Cao L

References (26)

Title : OsLDDT1, encoding a transmembrane structural DUF726 family protein, is essential for tapetum degradation and pollen formation in rice - Sun_2023_Plant.Sci__111596
Author(s) : Sun Z , Liu K , Chen C , Chen D , Peng Z , Zhou R , Liu L , He D , Duan W , Chen H , Huang C , Ruan Z , Zhang Y , Cao L , Zhan X , Cheng S , Sun L
Ref : Plant Sci , :111596 , 2023
Abstract : Formation of the pollen wall, which is mainly composed of lipid substances secreted by tapetal cells, is important to ensure pollen development in rice. Although several regulatory factors related to lipid biosynthesis during pollen wall formation have been identified in rice, the molecular mechanisms controlling lipid biosynthesis are unclear. We isolated the male-sterile rice mutant oslddt1 (leaked and delayed degraded tapetum 1). oslddt1 plants show complete pollen abortion resulting from delayed degradation of the tapetum and blocked formation of Ubisch bodies and pollen walls. OsLDDT1 (LOC_Os03g02170) encodes a DUF726 containing protein of unknown functionwith highly conserved transmembrane and alpha/beta Hydrolase domains. OsLDDT1 localizes to the endoplasmic reticulum and the gene is highly expressed in rice panicles. Genes involved in regulating fatty acid synthesis and formation of sporopollenin and pollen exine during anther developmentshowed significantly different expression patterns in oslddt1 plants. Interestingly, the wax and cutin contents in mature oslddt1-1 anthers were decreased by 74.07% and 72.22% compared to WT, indicating that OsLDDT1 is involved in fatty acid synthesis and affects formation of the anther epidermis. Our results provide as deeper understanding of the role of OsLDDT1 in regulating male sterility and also provide materials for hybrid rice breeding.
ESTHER : Sun_2023_Plant.Sci__111596
PubMedSearch : Sun_2023_Plant.Sci__111596
PubMedID: 36657664
Gene_locus related to this paper: orysj-q10ss2

Title : A main chain biodegradable polyurethane with anti-protein adsorption and anti-bacterial adhesion performances - Cao_2023_Soft.Matter__
Author(s) : Cao Z , Ma C , Xiang L , Cao L
Ref : Soft Matter , : , 2023
Abstract : Biofilms are initially formed by substances such as proteins secreted by bacteria adhering to a surface. To achieve a durable antibacterial material, biodegradable dihydroxyl-terminated poly[(ethylene oxide)-co-(ethylene carbonate)] (PEOC(OH)(2)) with anti-protein adsorption properties was synthesized in this study. Further polycondensation of PEOC(OH)(2) and isophorone diisocyanate (IPDI) led to biodegradable polyurethane (PEOC-PU) with PEOC as the soft segment. For comparison, polyurethanes with polyethylene glycol (PEG-PU) and polypropylene glycol (PPG-PU) as soft segments were also synthesized. The chemical structures of the polyurethanes were characterized by (1)H NMR and FTIR. The biodegradation behavior of PEOC-PU promoted by lipase due to the presence of ethylene carbonate units was also studied. Their resistance to proteins was studied using quartz crystal microbalance with dissipation (QCM-D) and the results revealed that PEOC-PU exhibited excellent nonspecific resistance to proteins. The colonization of microorganisms on PU in the liquid culture medium was further examined and the results showed that PEOC-PU exhibited excellent antibacterial adhesion performance due to its protein resistance and biodegradation.
ESTHER : Cao_2023_Soft.Matter__
PubMedSearch : Cao_2023_Soft.Matter__
PubMedID: 38073481

Title : Ferulic acid production from wheat bran by integration of enzymatic pretreatment and a cold-adapted carboxylesterase catalysis - Cao_2023_Bioresour.Technol__129435
Author(s) : Cao L , Xue D , Liu X , Wang C , Fang D , Zhang J , Gong C
Ref : Bioresour Technol , :129435 , 2023
Abstract : High-value chemical production from natural lignocellulose transformation is a reliable waste utilization approach. A gene encoding cold-adapted carboxylesterase in Arthrobacter soli Em07 was identified. The gene was cloned and expressed in Escherichia coli to obtain a carboxylesterase enzyme with a molecular weight of 37.2 KDa. The activity of the enzyme was determined using alpha-naphthyl acetate as substrate. Results showed that the optimum enzyme activity of carboxylesterase was at 10 degreesC and pH 7.0. It was also found that the enzyme could degrade 20 mg enzymatic pretreated de-starched wheat bran (DSWB) to produce 235.8 microg of ferulic acid under the same conditions, which was 5.6 times more than the control. Compared to the chemical strategy, enzymatic pretreatment is advantageous because it is environmentally friendly, and the by-products can be easily treated. Therefore, this strategy provides an effective method for high-value utilization of biomass waste in agriculture and industry.
ESTHER : Cao_2023_Bioresour.Technol__129435
PubMedSearch : Cao_2023_Bioresour.Technol__129435
PubMedID: 37399964

Title : Concurrent production of ferulic acid and glucose from wheat bran by catalysis of a putative bifunctional enzyme - Fang_2022_Bioresour.Technol__128393
Author(s) : Fang D , Xue D , Liu X , Cao L , Zhang J , Gong C
Ref : Bioresour Technol , :128393 , 2022
Abstract : The aim of this work is to study a bifunctional endoglucanase/carboxylesterase in Sphingobacterium soilsilvae Em02 and express it in soluble form in engineered Escherichia coli. The molecular weight of the recombinant protein of the bifunctional enzyme was 41 KDa. This research also determined the enzymatic activities of the bifunctional enzymes using microcrystalline cellulose and p-nitrophenyl butyrate as substrates and found 40 degreesC as the optimum temperature for their enzymatic activities. The optimal pH in dual function was 6.0 for endoglucanase and 7.0 for carboxylesterase. The bifunctional enzyme also exhibited enzymatic activities on the natural biomass by generating up to 3.94 mg of glucose and 49.4 microg of ferulic acid from 20 mg of destarched wheat bran. This indicates the broad application prospects of the bifunctional enzyme in agriculture and industry.
ESTHER : Fang_2022_Bioresour.Technol__128393
PubMedSearch : Fang_2022_Bioresour.Technol__128393
PubMedID: 36442604

Title : Patatin-like phospholipase CapV in Escherichia coli - morphological and physiological effects of one amino acid substitution - Li_2022_NPJ.Biofilms.Microbiomes_8_39
Author(s) : Li F , Cao L , Bahre H , Kim SK , Schroeder K , Jonas K , Koonce K , Mekonnen SA , Mohanty S , Bai F , Brauner A , Lee VT , Rohde M , Romling U
Ref : NPJ Biofilms Microbiomes , 8 :39 , 2022
Abstract : In rod-shaped bacteria, morphological plasticity occurs in response to stress, which blocks cell division to promote filamentation. We demonstrate here that overexpression of the patatin-like phospholipase variant CapV(Q329R), but not CapV, causes pronounced sulA-independent pyridoxine-inhibited cell filamentation in the Escherichia coli K-12-derivative MG1655 associated with restriction of flagella production and swimming motility. Conserved amino acids in canonical patatin-like phospholipase A motifs, but not the nucleophilic serine, are required to mediate CapV(Q329R) phenotypes. Furthermore, CapV(Q329R) production substantially alters the lipidome and colony morphotype including rdar biofilm formation with modulation of the production of the biofilm activator CsgD, and affects additional bacterial traits such as the efficiency of phage infection and antimicrobial susceptibility. Moreover, genetically diverse commensal and pathogenic E. coli strains and Salmonella typhimurium responded with cell filamentation and modulation in colony morphotype formation to CapV(Q329R) expression. In conclusion, this work identifies the CapV variant CapV(Q329R) as a pleiotropic regulator, emphasizes a scaffold function for patatin-like phospholipases, and highlights the impact of the substitution of a single conserved amino acid for protein functionality and alteration of host physiology.
ESTHER : Li_2022_NPJ.Biofilms.Microbiomes_8_39
PubMedSearch : Li_2022_NPJ.Biofilms.Microbiomes_8_39
PubMedID: 35546554

Title : Strategy to small intestine obstruction caused by Crohn's disease on the basis of transnasal ileus tube insertion - Zuo_2022_BMC.Surg_22_183
Author(s) : Zuo L , Cao L , Ding C , Tu H , Wei C , Yuan L , Wang H , Zhang B
Ref : BMC Surg , 22 :183 , 2022
Abstract : BACKGROUND: Previous studies reported that transnasal ileus tube was a new and useful method for rapid relief of small intestinal obstruction. However, no study reported the impacts of the transnasal ileus tube for Crohn's disease combined with intestinal obstruction. We aimed to describe the strategy to the small intestine obstruction caused by Crohn's disease on the basis of transnasal ileus tube insertion. METHODS: From November 2019 to November 2021, the data of 6 hospitalized patients with CD, diagnosed and conservatively treated in The Second Hospital of Nanjing, were not relived and retrospectively collected. After the insertion of transnasal ileus tube, demographic information, clinical features and treatment data were extracted from medical records. RESULTS: Six Crohn's disease patients with intestinal obstruction were included. Half of them were male. The patients aged from 29 to 70 years. Five patients had chronic intestinal obstruction more than one year. Three patients had intestinal surgery history. One patient had colonic abdominal fistula and anastomotic fistula, when she took intermittent usage of sulfsalazine and steroid. On admission, all the patients had abdominal pain, distention and mass. Five patients had anemia, low albumin and cholinesterase. All CDAI scores were more than 400. Compared to 19 patients with incomplete intestinal obstruction improved by nasogastric decompression tube, 6 patients with intestinal obstruction catheter had significant difference in time for relieving abdominal pain and distension (p = 0.003), time for alleviating abnormal mass (p >= 0.01), drainage volume (p = 0.004), and preoperative CDAI score (p = 0.001). Compared with X-ray image before insertion, complete remission of obstruction of 5 patients were observed in intestinal cavity after insertion. After 1-2 months nutrition, all the patients had small intestine resection and ileostomy, half of them underwent colectomy and fistula repair, and 4 patients were performed enterolysis at the same time, the residual small intestine length ranging from 250 to 400 cm. 1 patient had permanent ileostomy;1 patient had abdominal infection after operation. The typical manifestations of acute and chronic inflammation, transmural inflammation, pseudopolyps and serous fiber hyperplasia could be seen in pathological findings of patients 1 to 5. All the patients continued enteral nutrition after surgery. Four patients were treated with infliximab or vedolizumab. CONCLUSION: The current intestinal obstruction catheter which is used to treat patients with Crohn's combined obstruction can afford quick clinical remission, longer nutrition time, and suitable preoperative CDAI score for operation, which is worthy of wildly being used.
ESTHER : Zuo_2022_BMC.Surg_22_183
PubMedSearch : Zuo_2022_BMC.Surg_22_183
PubMedID: 35568851

Title : Point-of-care testing of butyrylcholinesterase activity through modulating the photothermal effect of cuprous oxide nanoparticles - Ma_2021_Mikrochim.Acta_188_392
Author(s) : Ma J , Ma L , Cao L , Miao Y , Dong J , Shi YE , Wang Z
Ref : Mikrochim Acta , 188 :392 , 2021
Abstract : Butyrylcholinesterase (BChE) is an important indicator for clinical diagnosis of liver dysfunction, organophosphate toxicity, and poststroke dementia. Point-of-care testing (POCT) of BChE activity is still a challenge, which is a critical requirement for the modern clinical diagnose. A portable photothermal BChE assay is proposed through modulating the photothermal effects of Cu(2)O nanoparticles. BChE can catalyze the decomposition of butyrylcholine, producing thiocholine, which further reduce and coordinate with CuO on surface of Cu(2)O nanoparticle. This leads to higher efficiency of formation of Cu(9)S(8) nanoparticles, through the reaction between Cu(2)O nanoparticle and NaHS, together with the promotion of photothermal conversion efficiency from 3.1 to 59.0%, under the excitation of 1064 nm laser radiation. An excellent linear relationship between the temperature change and the logarithm of BChE concentration is obtained in the range 1.0 to 7.5 U/mL, with a limit of detection of 0.076 U/mL. In addition, the portable photothermal assay shows strong detection robustness, which endows the accurate detection of BChE in human serum, together with the screening and quantification of organophosphorus pesticides. Such a simple, sensitive, and robust assay shows great potential for the applications to clinical BChE detection and brings a new horizon for the development of temperature based POCT.
ESTHER : Ma_2021_Mikrochim.Acta_188_392
PubMedSearch : Ma_2021_Mikrochim.Acta_188_392
PubMedID: 34697648

Title : N-MYC Downstream Regulated Gene 4 (NDRG4), a Frequent Downregulated Gene through DNA Hypermethylation, plays a Tumor Suppressive Role in Esophageal Adenocarcinoma - Cao_2020_Cancers.(Basel)_12_
Author(s) : Cao L , Hu T , Lu H , Peng D
Ref : Cancers (Basel) , 12 : , 2020
Abstract : The incidence of esophageal adenocarcinoma (EAC) has been rising dramatically in the past few decades in the United States and Western world. The N-myc downregulated gene 4 (NDRG4) belongs to the human NDRG family. In this study, we aimed to identify the expression levels, regulation, and functions of NDRG4 in EAC. Using an integrative epigenetic approach, we identified genes showing significant downregulation in EAC and displaying upregulation after 5-Aza-deoxycitidine. Among these genes, likely to be regulated by DNA methylation, NDRG4 was among the top 10 candidate genes. Analyses of TCGA (The Cancer Genome Atlas) and GEO (Gene Expression Omnibus) data sets and EAC tissue samples demonstrated that NDRG4 was significantly downregulated in EAC (p < 0.05). Using Pyrosequencing technology for quantification of DNA methylation, we detected that NDRG4 promoter methylation level was significantly higher in EAC tissue samples, as compared to normal esophagus samples (p < 0.01). A strong inverse correlation between NDRG4 methylation and its gene expression levels (r = -0.4, p < 0.01) was observed. Treatment with 5-Aza restored the NDRG4 expression, confirming that hypermethylation is a driving force for NDRG4 silencing in EAC. Pathway and gene set enrichment analyses of TCGA data suggested that NDRG4 is strongly associated with genes related to cell cycle regulation. Western blotting analysis showed significant downregulation of Cyclin D1, CDK4 and CDK6 in EAC cells after overexpression of NDRG4. Functionally, we found that the reconstitution of NDRG4 resulted in a significant reduction in tumor cell growth in two-dimensional (2D) and three-dimensional (3D) organotypic culture models and inhibited tumor cell proliferation as indicated by the EdU (5-ethynyl-2'-deoxyuridine) proliferation assay.
ESTHER : Cao_2020_Cancers.(Basel)_12_
PubMedSearch : Cao_2020_Cancers.(Basel)_12_
PubMedID: 32927604

Title : SNHG20\/miR-140-5p\/NDRG3 axis contributes to 5-fluorouracil resistance in gastric cancer - Yu_2019_Oncol.Lett_18_1337
Author(s) : Yu J , Shen J , Qiao X , Cao L , Yang Z , Ye H , Xi C , Zhou Q , Wang P , Gong Z
Ref : Oncol Lett , 18 :1337 , 2019
Abstract : 5-fluorouracil (5-FU)-based chemotherapy is the first line treatment for advanced gastric cancer. However, the effectiveness of 5-FU is limited by drug resistance. The N-myc downstream-regulated gene, family member 3 (NDRG3) is a member of the NDRG family and has been implicated in numerous types of cancer. However, the role of NDRG3 in gastric cancer remains unclear. In the present study, NDRG3 mRNA expression in gastric cancer and adjacent normal tissues was analyzed using the Gene Expression Profiling Interactive Analysis web tool. NDRG3 expression was silenced using short hairpin RNAs to examine the effect of NDRG3 on the growth of gastric cancer cells. Potential regulators of NDRG3 were identified using the TargetScan and MicroRNA tools and verified by a luciferase assay and reverse transcription-quantitative PCR analysis. The current study demonstrated that NDRG3 was upregulated in gastric cancer specimens and promoted cell proliferation in gastric cancer cell lines. Furthermore, the present study revealed that the small nucleolar RNA host gene 20 (SNHG20)/microRNA (miR)-140-5p signaling pathway may regulate the expression of NDRG3. SNHG20 was revealed to be involved in mediating resistance to 5-FU in gastric cancer cell lines via NDRG3. In conclusion, the results of the present study suggest that the SNHG20/miR-140-5p/NDRG3 axis may be involved in mediating resistance to 5-FU in gastric cancer.
ESTHER : Yu_2019_Oncol.Lett_18_1337
PubMedSearch : Yu_2019_Oncol.Lett_18_1337
PubMedID: 31423195
Gene_locus related to this paper: human-NDRG3

Title : Physicochemical Properties, Crystallization Behavior and Oxidative Stabilities of Enzymatic Interesterified Fats of Beef Tallow, Palm Stearin and Camellia Oil Blends - Pang_2019_J.Oleo.Sci_68_131
Author(s) : Pang M , Ge Y , Cao L , Cheng J , Jiang S
Ref : J Oleo Sci , 68 :131 , 2019
Abstract : Properties, crystallization behavior and oxidative stabilities of enzymatically catalyzed interesterified fats were investigated in this study. Interesterified fats were catalyzed by Lipase Lipozyme RM IM, through reaction from beef tallow (BT), palm stearin (PS) and camellia oil (CO)under the mass ratio of 7.55: 2.45: 4 (BT: CO: PS) using 3.65% (w/w) of Lipozyme RM IM at 72.6 degC for 3.85 h. After reaction, interesterified fats with 36.8 degC sliding melting point (SMP) was obtained. Physicochemical properties (fatty acid profile, triacylglycerol profile, solid fat content (SFC), melting and crystallization curve, polymorphic forms) of interesterified fats were characterized. Results proved that interesterified fats blends after interesterification were improved with desirable beta' type crystals and preferable SFC. Triacylglycerol constituent of interesterified fats displayed a decrease in OOO, PSS/SPS, LLL, SSS and increased in PSO/POS/SPO, POO/OPO, POP/PPO, PLO/PLP/PPL by comparison of physical blends without interesterification. Additionally, it is estimated that interesterified fats have a moderate antioxidative stability about 352 days-shelf life at 20 degC through the traditional accelerated oxidation test. In conclusion, interesterified fats with desirable properties could be suitable for plastic fats use.
ESTHER : Pang_2019_J.Oleo.Sci_68_131
PubMedSearch : Pang_2019_J.Oleo.Sci_68_131
PubMedID: 30651414

Title : We FRET so You Don't Have To: New Models of the Lipoprotein Lipase Dimer - Hayne_2018_Biochemistry_57_241
Author(s) : Hayne CK , Yumerefendi H , Cao L , Gauer JW , Lafferty MJ , Kuhlman B , Erie DA , Neher SB
Ref : Biochemistry , 57 :241 , 2018
Abstract : Lipoprotein lipase (LPL) is a dimeric enzyme that is responsible for clearing triglyceride-rich lipoproteins from the blood. Although LPL plays a key role in cardiovascular health, an experimentally derived three-dimensional structure has not been determined. Such a structure would aid in understanding mutations in LPL that cause familial LPL deficiency in patients and help in the development of therapeutic strategies to target LPL. A major obstacle to structural studies of LPL is that LPL is an unstable protein that is difficult to produce in the quantities needed for nuclear magnetic resonance or crystallography. We present updated LPL structural models generated by combining disulfide mapping, computational modeling, and data derived from single-molecule Forster resonance energy transfer (smFRET). We pioneer the technique of smFRET for use with LPL by developing conditions for imaging active LPL and identifying positions in LPL for the attachment of fluorophores. Using this approach, we measure LPL-LPL intermolecular interactions to generate experimental constraints that inform new computational models of the LPL dimer structure. These models suggest that LPL may dimerize using an interface that is different from the dimerization interface suggested by crystal packing contacts seen in structures of pancreatic lipase.
ESTHER : Hayne_2018_Biochemistry_57_241
PubMedSearch : Hayne_2018_Biochemistry_57_241
PubMedID: 29303250

Title : Responses of Antioxidant Defense and Immune Gene Expression in Early Life Stages of Large Yellow Croaker (Pseudosciaena crocea) Under Methyl Mercury Exposure - Wu_2018_Front.Physiol_9_1436
Author(s) : Wu F , Huang W , Liu Q , Xu X , Zeng J , Cao L , Hu J , Gao Y , Jia S
Ref : Front Physiol , 9 :1436 , 2018
Abstract : Early life stages of marine organisms are the most sensitive stages to environment stressors including pollutants. In order to understand the toxicological effects induced by MeHg exposure on juveniles of large yellow croaker (Pseudosciaena crocea), a toxicity test was performed wherein fish were exposed to sub-lethal concentrations of MeHg under laboratory conditions (18 +/- 1 degrees C; 26 +/- 1 in salinity). After 30 days of 0-4.0 mug L(-1) MeHg exposure, SOD activity was significantly decreased in the 0.25, 1.0, and 4.0 mug L(-1) treatments; while CAT activity was significantly increased in the 4.0 mug L(-1) treatments; GSH level, GPx activity were significantly elevated in the 4.0 mug L(-1) treatments, respectively. Meanwhile, malondialdehyde content was also significantly increased in the 1.0 and 4.0 mug L(-1) treatments with respect to the control. Acetylcholinesterase activity was significantly decreased by 18.3, 25.2, and 21.7% in the 0.25, 1.0, and 4.0 mug L(-1) treatments, respectively. The expression of TCTP, GST3, Hsp70, Hsp27 mRNA were all up-regulated in juveniles with a dose-dependent manner exposed to MeHg. These results suggest that large yellow croaker juveniles have the potential to regulate the levels of antioxidant enzymes and initiate immune response in order to protect fish to some extent from oxidative stress induced by MeHg.
ESTHER : Wu_2018_Front.Physiol_9_1436
PubMedSearch : Wu_2018_Front.Physiol_9_1436
PubMedID: 30364149

Title : Tat-Independent Secretion of Polyethylene Terephthalate Hydrolase PETase in Bacillus subtilis 168 Mediated by Its Native Signal Peptide - Huang_2018_J.Agric.Food.Chem_66_13217
Author(s) : Huang X , Cao L , Qin Z , Li S , Kong W , Liu Y
Ref : Journal of Agricultural and Food Chemistry , 66 :13217 , 2018
Abstract : Widespread utilization of polyethylene terephthalate (PET) has caused critical environmental pollution. The enzymatic degradation of PET is a promising solution to this problem. In this study, PETase, which exhibits much higher PET-hydrolytic activity than other enzymes, was successfully secreted into extracellular milieu from Bacillus subtilis 168 under the direction of its native signal peptide (named SP(PETase)). SP(PETase) is predicted to be a twin-arginine signal peptide. Intriguingly, inactivation of twin-arginine translocation (Tat) complexes improved the secretion amount by 3.8-fold, indicating that PETase was exported via Tat-independent pathway. To the best of our knowledge, this is the first report on the improvement of Tat-independent secretion by inactivating Tat components of B. subtilis 168 in LB medium. Furthermore, PET film degradation assay showed that the secreted PETase was fully active. This study paves the first step to construct an efficient engineered strain for PET degradation.
ESTHER : Huang_2018_J.Agric.Food.Chem_66_13217
PubMedSearch : Huang_2018_J.Agric.Food.Chem_66_13217
PubMedID: 30465427

Title : The HindIII and PvuII polymorphisms of lipoprotein lipase (LPL) gene reduce the risk of ischemic stroke (IS): A meta-analysis - Cao_2018_Medicine.(Baltimore)_97_e0483
Author(s) : Cao L , Li Q , Chen X
Ref : Medicine (Baltimore) , 97 :e0483 , 2018
Abstract : BACKGROUND: Lipoprotein lipase (LPL) polymorphisms were suggested to be the risk factor for ischemic stroke (IS). However, controversial results were obtained. Our objective was to investigate the association of LPL polymorphisms at Ser447Ter, HindIII (+/-), and PvuII (+/-) with IS risk. METHODS: Literatures search were carried out on databases: PubMed, Web of science, the Cochrane database of system reviews, Chinese National Knowledge Infrastructure, and Embase. Pooled odds ratio (OR) with 95% confidence interval (CI) was calculated to detect the relationship between LPL polymorphisms and the risk of IS. RESULTS: No significant association was detected between LPL Ser447Ter and IS in allelic, dominant, or recessive models (P > .05). Significant lower frequencies of allelic and dominant models of LPL HindIII (+/-) and PvuII (+/-) in cases were detected (HindIII (+/-): allelic model: P = .0002, OR[95%CI] = 0.80 [0.71, 0.90]; dominant model: P = 0.003, OR[95%CI] = 0.80 [0.69, 0.92]; PvuII (+/-): allelic model: P < 0.0001, OR[95%CI] = 0.75[0.65-0.86]; dominant model: P = 0.02, OR[95%CI] = 0.67[0.48-0.93]). And the recessive model of PvuII (+/-) was significantly associated with the IS risk (P = .01, OR[95%CI] = .71[0.55-0.93]). Subgroup analysis stratified by ethnicity showed that the frequencies of allelic, dominant, and recessive models of HindIII (+/-), as well as dominant model of PvuII (+/-) were significant lower in Asian cases (HindIII (+/-): allelic model: P < .00001, OR[95%CI] = 0.69 [0.59, 0.79]; dominant model: P < .0001, OR[95%CI] = 0.69 [0.58, 0.83]; recessive model: P = .005, OR[95%CI] = 0.66 [0.50, 0.89]; PvuII (+/-): dominant model: P = .0008, OR[95%CI] = 0.66 [0.51-0.84]), but not in Caucasian cases (P > .05). In addition, the frequencies of allelic and recessive models of PvuII (+/-) significantly decreased in Caucasian cases (P < .05). CONCLUSION: the HindIII (+/-) and PvuII (+/-), but not the Ser447Ter might be the protective factors for IS.
ESTHER : Cao_2018_Medicine.(Baltimore)_97_e0483
PubMedSearch : Cao_2018_Medicine.(Baltimore)_97_e0483
PubMedID: 29718838
Gene_locus related to this paper: human-LPL

Title : Clinical diagnostic significance of prealbumin, cholinesterase and retinol binding protein in liver cirrhosis combined with encephalopathy - Tan_2018_Br.J.Biomed.Sci__1
Author(s) : Tan L , Meng Y , Zeng T , Wang Q , Long T , Wu S , Guan X , Fu H , Zheng W , Tian Y , Chen J , Yu J , Wu Y , Li H , Cao L
Ref : Br J Biomed Sci , :1 , 2018
Abstract : OBJECTIVE: Hepatic encephalopathy is a common consequence of liver cirrhosis, but diagnosis can be difficult as it is based on clinical criteria alone. We hypothesised that serum prealbumin, cholinesterase and retinol binding protein (RBP) can help support the diagnosis of hepatic encephalopathy. METHODS: We enrolled 306 cirrhotic patients (110 with encephalopathy), 100 chronic hepatitis B patients and 50 healthy controls, measuring routine liver function tests (ALT, AST, GGT, ALP, and bilirubin), albumin, prothrombin time, prealbumin, cholinesterase and RBP by routine methods. Logistic regression analysis and areas under the receiver operating characteristic curves (AUCs) were used to find predictive factors for hepatic encephalopathy. RESULTS: There were differences in all laboratory indices between the three groups (all p < 0.001). In univariate analysis, albumin, prothrombin time, prealbumin, cholinesterase and RBP were significantly altered in those with encephalopathy (p < 0.01), but only prealbumin, cholinesterase and RBP levels were significant predictors in multivariate analysis, and each was linked to the severity of liver fibrosis defined by the Child-Pugh score (all p < 0.001). The AUCs (95% CI) of prealbumin, cholinesterase and RBP for diagnosing liver cirrhosis with hepatic encephalopathy were comparable at 0.85 (81-90), 0.81 (0.76-0.85) and 0.81 (0.76-0.86), respectively (all p < 0.01). CONCLUSIONS: Serum prealbumin, cholinesterase and RBP levels are of potential clinical value in diagnosis of liver cirrhosis complicated by encephalopathy.
ESTHER : Tan_2018_Br.J.Biomed.Sci__1
PubMedSearch : Tan_2018_Br.J.Biomed.Sci__1
PubMedID: 30392460

Title : Increased permeability of the blood-brain barrier and Alzheimer's disease-like alterations in slit-2 transgenic mice - Li_2015_J.Alzheimers.Dis_43_535
Author(s) : Li JC , Han L , Wen YX , Yang YX , Li S , Li XS , Zhao CJ , Wang TY , Chen H , Liu Y , Qi CL , He XD , Gu QL , Ye YX , Zhang Y , Huang R , Wu YE , He RR , Kurihara H , Song XY , Cao L , Wang LJ
Ref : J Alzheimers Dis , 43 :535 , 2015
Abstract : Alzheimer's disease (AD) is a progressive neurological disorder that primarily affects memory, and its prevalence is rising. Increasing evidence suggests that dysfunction of the blood-brain barrier (BBB) may be involved in AD and other neurodegenerative diseases. Herein, we report that the permeability of the BBB is increased and that AD-like alterations are present in Slit-2 overexpressing transgenic mice. We found that behavioral change and the corresponding molecular diagnostic markers of AD, such as hippocampal neuron apoptosis, amyloid-beta (Abeta) protein deposition, and acetylcholinesterase expression, were increased in the Slit-2 transgenic mice. Moreover, the endothelial cells were dysfunctional, the size of the lateral ventricle cavity increased, and the permeability of the BBB increased. Additionally, there was an increased serum level of glutamate indicating that the BBB is related to AD. Finally, histopathological analysis of other organs in the Slit-2 overexpressing mice did not show any marked abnormalities. These findings demonstrate that Slit2 overexpression may be responsible for AD-like alterations and the increased BBB permeability in these mice. Our study provides a potential novel mechanism for the development of AD.
ESTHER : Li_2015_J.Alzheimers.Dis_43_535
PubMedSearch : Li_2015_J.Alzheimers.Dis_43_535
PubMedID: 25114073

Title : Genetic variants in epoxide hydrolases modify the risk of oligozoospermia and asthenospermia in Han-Chinese population - Qin_2012_Gene_510_171
Author(s) : Qin Y , Han X , Peng Y , Shen R , Guo X , Cao L , Song L , Sha J , Xia Y , Wang X
Ref : Gene , 510 :171 , 2012
Abstract : OBJECTIVES Epoxide hydrolases are involved in detoxifying and excreting the environmental chemicals which are associated with decreased semen quality and male infertility We hypothesized that polymorphisms in epoxide hydrolases may be associated with risk of oligozoospermia and asthenospermia DESIGN AND METHODS In this study 468 fertile controls and 672 idiopathic male infertile patients were recruited SNPstream and TaqMan assay were used to genotype four single nucleotide polymorphisms in EPHX1 and EPHX2 The semen analysis was performed by computer-assisted semen analysis system RESULTS Our results demonstrated that rs1042064 of EPHX2 was significantly associated with decreased risk of oligozoospermia OR=0.65 95 CI 0.44-0.98 and asthenospermia OR=0.66 95 CI 0.46-0.94 CONCLUSIONS Our results provided evidence that genetic variants in epoxide hydrolases may modify the risk of oligozoospermia and asthenospermia in Han-Chinese population.
ESTHER : Qin_2012_Gene_510_171
PubMedSearch : Qin_2012_Gene_510_171
PubMedID: 22986331

Title : Direct pharmacokinetic analysis of puqietinone by in vivo microdialysis sampling and turbulent-flow chromatography coupled with liquid chromatography-mass spectrometry - Xin_2012_J.Chromatogr.B.Analyt.Technol.Biomed.Life.Sci_899_127
Author(s) : Xin GZ , Cao L , Shi ZQ , Li HJ , Wen XD , Chen J , Qi LW , Li P
Ref : Journal of Chromatography B Analyt Technol Biomed Life Sciences , 899 :127 , 2012
Abstract : Sample pretreatment is a key step in bioanalytical process because of possible interference and matrix effects in mass spectrometry analysis. In this work, a novel strategy towards high speed and sensitivity was developed combining in vivo microdialysis (MD) sampling, turbulent-flow chromatography (TFC), and liquid chromatography-mass spectrometry (LC-MS). The procedures of cleanup, preconcentration, and separation were completed on-line in one step within 10min. During the MD optimization procedure, 1% hydroxypropyl-beta-cyclodextrin (HP-beta-CD) was used to improve the relative recovery of the analyte. Untreated MD samples were directly injected, and a TFC precolumn was flushed for 1min with aqueous phase of 4mL/min flow rate to desalt and concentrate biosamples. The retained analytes were then back-flushed by a switching valve onto a fast LC column (4.6mmx50mm, 1.8mum) for separation. Another diverter valve was employed to prevent the HP-beta-CD that interferes with the ESI process from entering the MS. Puqietinone, a lipophilic alkaloid from Fritillaria puqiensis, was used as a case for validation. Results showed that the limit of quantification for puqietinone was 0.10ng/mL, and good linearity (R(2)=0.9993) was maintained over the range of 1.02-200.02ng/mL. Accuracy and precision were satisfactory within the range of the standard curve. This approach was able to effectively eliminate the influences of matrix effect and carry-over as the injection volume increased up to 20muL. The developed method was successfully applied to pharmacokinetic study of puqietinone after intravenous administration to rat. Results demonstrate the potential of using MD with TFC-LC/MS for in vivo monitoring experiments.
ESTHER : Xin_2012_J.Chromatogr.B.Analyt.Technol.Biomed.Life.Sci_899_127
PubMedSearch : Xin_2012_J.Chromatogr.B.Analyt.Technol.Biomed.Life.Sci_899_127
PubMedID: 22658466

Title : Comparative analysis of the genomes of two field isolates of the rice blast fungus Magnaporthe oryzae - Xue_2012_PLoS.Genet_8_e1002869
Author(s) : Xue M , Yang J , Li Z , Hu S , Yao N , Dean RA , Zhao W , Shen M , Zhang H , Li C , Liu L , Cao L , Xu X , Xing Y , Hsiang T , Zhang Z , Xu JR , Peng YL
Ref : PLoS Genet , 8 :e1002869 , 2012
Abstract : Rice blast caused by Magnaporthe oryzae is one of the most destructive diseases of rice worldwide. The fungal pathogen is notorious for its ability to overcome host resistance. To better understand its genetic variation in nature, we sequenced the genomes of two field isolates, Y34 and P131. In comparison with the previously sequenced laboratory strain 70-15, both field isolates had a similar genome size but slightly more genes. Sequences from the field isolates were used to improve genome assembly and gene prediction of 70-15. Although the overall genome structure is similar, a number of gene families that are likely involved in plant-fungal interactions are expanded in the field isolates. Genome-wide analysis on asynonymous to synonymous nucleotide substitution rates revealed that many infection-related genes underwent diversifying selection. The field isolates also have hundreds of isolate-specific genes and a number of isolate-specific gene duplication events. Functional characterization of randomly selected isolate-specific genes revealed that they play diverse roles, some of which affect virulence. Furthermore, each genome contains thousands of loci of transposon-like elements, but less than 30% of them are conserved among different isolates, suggesting active transposition events in M. oryzae. A total of approximately 200 genes were disrupted in these three strains by transposable elements. Interestingly, transposon-like elements tend to be associated with isolate-specific or duplicated sequences. Overall, our results indicate that gain or loss of unique genes, DNA duplication, gene family expansion, and frequent translocation of transposon-like elements are important factors in genome variation of the rice blast fungus.
ESTHER : Xue_2012_PLoS.Genet_8_e1002869
PubMedSearch : Xue_2012_PLoS.Genet_8_e1002869
PubMedID: 22876203
Gene_locus related to this paper: maggr-q0pnd2 , mago7-g4mk92 , mago7-g4mkc6 , mago7-g4mkk9 , mago7-g4mns9 , mago7-g4ms19 , mago7-g4mvm8 , mago7-g4mvw5 , mago7-g4mvw6 , mago7-g4n6j4 , mago7-g4nal1 , mago7-g4nba0 , mago7-g4nbs0 , mago7-g4nc41 , mago7-g4ncz9 , mago7-g4nhn9 , mago7-g4nil3 , mago7-g4nky6 , mago7-g5ehg6 , mago7-g5ehv6 , mago7-g4msm5 , magoy-l7il05 , magoy-l7i6m7 , magoy-l7ic25

Title : Ontogenetic development of digestive enzymes and effect of starvation in miiuy croaker Miichthys miiuy larvae - Shan_2009_Fish.Physiol.Biochem_35_385
Author(s) : Shan XJ , Huang W , Cao L , Xiao ZZ , Dou SZ
Ref : Fish Physiol Biochem , 35 :385 , 2009
Abstract : The ontogenetic development of the digestive enzymes amylase, lipase, trypsin, and alkaline phosphatase and the effect of starvation in miiuy croaker Miichthys miiuy larvae were studied. The activities of these enzymes were detected prior to exogenous feeding, but their developmental patterns differed remarkably. Trypsin activity continuously increased from 2 days after hatching (dah), peaked on 20 dah, and decreased to 25 dah at weaning. Alkaline phosphatase activity oscillated at low levels within a small range after the first feeding on 3 dah. In contrast, amylase and lipase activities followed the general developmental pattern that has been characterized in fish larvae, with a succession of increases or decreases. Amylase, lipase, and trypsin activities generally started to increase or decrease at transitions from endogenous to exogenous feeding or diet changes, suggesting that these enzymatic activities can be modulated by feeding modes. The activities of all the enzymes remained stable from 25 dah onwards, coinciding with the formation of gastric glands and pyloric caecum. These results imply that specific activities of these enzymes underwent changes due to morphological and physiological modifications or diet shift during larval development but that they became stable after the development of the digestive organs and associated glands was fully completed and the organs/glands functioned. Trypsin and alkaline phosphatase were more sensitive to starvation than amylase and lipase because delayed feeding up to 2 days after mouth opening was able to adversely affect their activities. Enzyme activities did not significantly differ among feeding groups during endogenous feeding; however, all activities were remarkably reduced when delayed feeding was within 3 days after mouth opening. Initiation of larvae feeding should occur within 2 days after mouth opening so that good growth and survival can be obtained in the culture.
ESTHER : Shan_2009_Fish.Physiol.Biochem_35_385
PubMedSearch : Shan_2009_Fish.Physiol.Biochem_35_385
PubMedID: 18821026

Title : FRET-based fluorescence probes for hydrolysis study and pig liver esterase activity - Yi_2008_Tetrahedron_64_8947
Author(s) : Yi L , Cao L , Liu L , Xi Z
Ref : Tetrahedron , 64 :8947 , 2008
Abstract : New fluorescent probes based on simple organic synthesis were designed and synthesized, and their hydrolysis catalyzed via base and pig liver esterase (PLE) was studied using FRET (fluorescence resonant energy transfer), with 1-naphthylacetic group as a donor and dansyl group as an acceptor. By simultaneous recording of changes of the donor fluorescence intensities, kinetic parameters for base-catalyzed and PLE-catalyzed hydrolysis can be determined. The presented FRET assay is a convenient and simple method and both fluorescent probes are good real-time indicators for the analysis of ester hydrolysis such as PLE activities.
ESTHER : Yi_2008_Tetrahedron_64_8947
PubMedSearch : Yi_2008_Tetrahedron_64_8947
PubMedID:
Gene_locus related to this paper: pig-PLE1

Title : Chain length dependence of the interactions of bisquaternary ligands with the Torpedo nicotinic acetylcholine receptor - Carter_2007_Biochem.Pharmacol_73_417
Author(s) : Carter CR , Cao L , Kawai H , Smith PA , Dryden WF , Raftery MA , Dunn SM
Ref : Biochemical Pharmacology , 73 :417 , 2007
Abstract : The interactions of a series of bisholine esters [(CH3)3N+CH(2)CH2OCO-(CH2)n-COOCH2CH2N+(CH3)3] with the Torpedo nicotinic acetylcholine receptor have been investigated. In equilibrium binding studies, [3H]-suberyldicholine (n=6) binds to an equivalent number of sites as [3H]-acetylcholine and with similar affinity (KD approximately 15 nM). In competition studies, all bischoline esters examined displaced both radioligands in an apparently simple competitive manner. Estimated dissociation constants (KI) showed clear chain length dependence. Short chain molecules (n6) had high affinity similar to suberyldicholine. Functional responses were measured by either rapid flux techniques using Torpedo membrane vesicles or voltage-clamp analyses of recombinant receptors expressed in Xenopus oocytes. Both approaches revealed that suberyldicholine (EC50 approximately 3.4 microM) is 14-25-fold more potent than acetylcholine. However, suberyldicholine elicited only about 45% of the maximum response of the natural ligand, i.e., it is a partial agonist. The potency of this bischoline series increased with chain length. Whereas the shorter ligands (nor=4) had similar (or higher) potency to suberyldicholine. Ligand efficacy had an approximately bell-shaped dependence on chain length and compounds where nor=8 were very poor partial agonists. Based on estimates of interonium distances, we suggest that bisquaternary ligands can interact with multiple binding sites on the nAChR and, depending on the conformational state of the receptor, these sites are 15-20A apart.
ESTHER : Carter_2007_Biochem.Pharmacol_73_417
PubMedSearch : Carter_2007_Biochem.Pharmacol_73_417
PubMedID: 17118342

Title : Protein engineering of epoxide hydrolase from Agrobacterium radiobacter AD1 for enhanced activity and enantioselective production of (R)-1-phenylethane-1,2-diol - Rui_2005_Appl.Environ.Microbiol_71_3995
Author(s) : Rui L , Cao L , Chen W , Reardon KF , Wood TK
Ref : Applied Environmental Microbiology , 71 :3995 , 2005
Abstract : DNA shuffling and saturation mutagenesis of positions F108, L190, I219, D235, and C248 were used to generate variants of the epoxide hydrolase of Agrobacterium radiobacter AD1 (EchA) with enhanced enantioselectivity and activity for styrene oxide and enhanced activity for 1,2-epoxyhexane and epoxypropane. EchA variant I219F has more than fivefold-enhanced enantioselectivity toward racemic styrene oxide, with the enantiomeric ratio value (E value) for the production of (R)-1-phenylethane-1,2-diol increased from 17 for the wild-type enzyme to 91, as well as twofold-improved activity for the production of (R)-1-phenylethane-1,2-diol (1.96 +/- 0.09 versus 1.04 +/- 0.07 micromol/min/mg for wild-type EchA). Computer modeling indicated that this mutation significantly alters (R)-styrene oxide binding in the active site. Another three variants from EchA active-site engineering, F108L/C248I, I219L/C248I, and F108L/I219L/C248I, also exhibited improved enantioselectivity toward racemic styrene oxide in favor of production of the corresponding diol in the (R) configuration (twofold enhancement in their E values). Variant F108L/I219L/C248I also demonstrated 10-fold- and 2-fold-increased activity on 5 mM epoxypropane (24 +/- 2 versus 2.4 +/- 0.3 micromol/min/mg for the wild-type enzyme) and 5 mM 1,2-epoxyhexane (5.2 +/- 0.5 versus 2.6 +/- 0.0 micromol/min/mg for the wild-type enzyme). Both variants L190F (isolated from a DNA shuffling library) and L190Y (created from subsequent saturation mutagenesis) showed significantly enhanced activity for racemic styrene oxide hydrolysis, with 4.8-fold (8.6 +/- 0.3 versus 1.8 +/- 0.2 micromol/min/mg for the wild-type enzyme) and 2.7-fold (4.8 +/- 0.8 versus 1.8 +/- 0.2 micromol/min/mg for the wild-type enzyme) improvements, respectively. L190Y also hydrolyzed 1,2-epoxyhexane 2.5 times faster than the wild-type enzyme.
ESTHER : Rui_2005_Appl.Environ.Microbiol_71_3995
PubMedSearch : Rui_2005_Appl.Environ.Microbiol_71_3995
PubMedID: 16000814
Gene_locus related to this paper: agrra-echA

Title : Active site engineering of the epoxide hydrolase from Agrobacterium radiobacter AD1 to enhance aerobic mineralization of cis-1,2-dichloroethylene in cells expressing an evolved toluene ortho-monooxygenase - Rui_2004_J.Biol.Chem_279_46810
Author(s) : Rui L , Cao L , Chen W , Reardon KF , Wood TK
Ref : Journal of Biological Chemistry , 279 :46810 , 2004
Abstract : Chlorinated ethenes are the most prevalent ground-water pollutants, and the toxic epoxides generated during their aerobic biodegradation limit the extent of transformation. Hydrolysis of the toxic epoxide by epoxide hydrolases represents the major biological detoxification strategy; however, chlorinated epoxyethanes are not accepted by known bacterial epoxide hydrolases. Here, the epoxide hydrolase from Agrobacterium radiobacter AD1 (EchA), which enables growth on epichlorohydrin, was tuned to accept cis-1,2-dichloroepoxyethane as a substrate by accumulating beneficial mutations from three rounds of saturation mutagenesis at three selected active site residues, Phe-108, Ile-219, and Cys-248 (no beneficial mutations were found at position Ile-111). The EchA F108L/I219L/C248I variant coexpressed with a DNA-shuffled toluene ortho-monooxygenase, which initiates attack on the chlorinated ethene, enhanced the degradation of cis-dichloroethylene (cis-DCE) an infinite extent compared with wild-type EchA at low concentrations (6.8 microm) and up to 10-fold at high concentrations (540 microm). EchA variants with single mutations (F108L, I219F, or C248I) enhanced cis-DCE mineralization 2.5-fold (540 microm), and EchA variants with double mutations, I219L/C248I and F108L/C248I, increased cis-DCE mineralization 4- and 7-fold, respectively (540 microm). For complete degradation of cis-DCE to chloride ions, the apparent Vmax/Km for the Escherichia coli strain expressing recombinant the EchA F108L/I219L/C248I variant was increased over 5-fold as a result of the evolution of EchA. The EchA F108L/I219L/C248I variant also had enhanced activity for 1,2-epoxyhexane (2-fold) and the natural substrate epichlorohydrin (6-fold).
ESTHER : Rui_2004_J.Biol.Chem_279_46810
PubMedSearch : Rui_2004_J.Biol.Chem_279_46810
PubMedID: 15347647
Gene_locus related to this paper: agrra-echA

Title : [Protective effect of exogenous glial cell line derived neurotrophic factor on neurons after sciatic nerve injury in rats] - Chen_2000_Sheng.Li.Xue.Bao_52_295
Author(s) : Chen ZY , Cao L , Lu CL , He C , Bao X
Ref : Sheng Li Xue Bao , 52 :295 , 2000
Abstract : The aim of the study was to investigate the effect of exogenous glial cell line derived neurotrophic factor (GDNF) on spinal cord neurons after sciatic nerve axotomy. Upon silicone tubulization of transected sciatic nerve in the adult rat, either 0.9% saline or GDNF solution was injected into the silicone chamber. It was observed by Nissl and enzyme histochemistry staining that exogenous GDNF decreased lesion induced motor neuron death in lateral nucleus of spinal anterior horn and the changes in activity of cholinesterase and acid phosphatase in spinal cord and sensory ganglions. These results suggest that exogenous GDNF is capable of protecting motor neurons from death induced by peripheral nerve injury.
ESTHER : Chen_2000_Sheng.Li.Xue.Bao_52_295
PubMedSearch : Chen_2000_Sheng.Li.Xue.Bao_52_295
PubMedID: 11951110

Title : Interaction of a semirigid agonist with Torpedo acetylcholine receptor - Kawai_2000_Biochemistry_39_3867
Author(s) : Kawai H , Cao L , Dunn SM , Dryden WF , Raftery MA
Ref : Biochemistry , 39 :3867 , 2000
Abstract : The binding of the semirigid agonist [(3)H]arecolone methiodide to the Torpedo nicotinic acetylcholine receptor has been correlated with its functional properties measured both in flux studies with Torpedo membrane vesicles and by single-channel analysis after reconstitution in giant liposomes. Under both equilibrium and preequilibrium conditions, the binding of arecolone methiodide is similar to that of other agonists such as acetylcholine. At equilibrium, it binds to two sites per receptor with high affinity (K(d) = 99 +/- 12 nM), and studies of its dissociation kinetics suggest that each of these sites is made up of two subsites that are mutually exclusive at equilibrium. The kinetics of arecolone methiodide binding were monitored by the changes in the receptor intrinsic fluorescence, and the data are consistent with a model in which the initial binding event is followed by sequential conformational transitions of the receptor-ligand complex. In flux studies, arecolone methiodide was approximately 3-fold more potent (EC(50) = 31 +/- 5 microM) than acetylcholine but its maximum flux rate was 4-10-fold lower. This phenomenon has been studied further by single-channel analysis of Torpedo receptors reconstituted in giant liposomes. Whereas the flexible agonist carbamylcholine (5 microM) was shown to induce channels with conductances of 56 and 34 pS with approximately equal frequency, arecolone methiodide (2 microM) preferentially induced the channel of lower conductance. These results are interpreted in terms of a simple model in which the rigidity of arecolone methiodide restrains the conformation that the receptor-ligand complex can adopt, thus favoring the lower conductance state.
ESTHER : Kawai_2000_Biochemistry_39_3867
PubMedSearch : Kawai_2000_Biochemistry_39_3867
PubMedID: 10747774