Ji J

References (21)

Title : Biotransformation activities of fungal strain apiotrichum sp. IB-1 to ibuprofen and naproxen - Peng_2024_Arch.Microbiol_206_232
Author(s) : Peng L , Yun H , Ji J , Zhang W , Xu T , Li S , Wang Z , Xie L , Li X
Ref : Arch Microbiol , 206 :232 , 2024
Abstract : Ibuprofen (IBU) and naproxen (NPX), as widely prescribed non-steroidal anti-inflammatory drugs (NSAIDs), are largely produced and consumed globally, leading to frequent and ubiquitous detection in various aqueous environments. Previously, the microbial transformation of them has been given a little attention, especially with the isolated fungus. A yeast-like Apiotrichum sp. IB-1 has been isolated and identified, which could simultaneously transform IBU (5 mg/L) and NPX (2.5 mg/L) with maximum efficiencies of 95.77% and 88.31%, respectively. For mono-substrate, the transformation efficiency of IB-1 was comparable to that of co-removal conditions, higher than most of isolates so far. IBU was oxidized mainly through hydroxylation (m/z of 221, 253) and NPX was detoxified mainly via demethylation (m/z of 215) as shown by UPLC-MS/MS results. Based on transcriptome analysis, the addition of IBU stimulated the basic metabolism like TCA cycle. The transporters and respiration related genes were also up-regulated accompanied with higher expression of several dehydrogenase, carboxylesterase, dioxygenase and oxidoreductase encoding genes, which may be involved in the transformation of IBU. The main functional genes responsible for IBU and NPX transformation for IB-1 should be similar in view of previous studies, which needs further confirmation. This fungus would be useful for potential bioremediation of NSAIDs pollution and accelerate the discovery of functional oxidative genes and enzymes different from those of bacteria.
ESTHER : Peng_2024_Arch.Microbiol_206_232
PubMedSearch : Peng_2024_Arch.Microbiol_206_232
PubMedID: 38658486

Title : Isolation and Mechanistic Characterization of a Novel Zearalenone-Degrading Enzyme - Ji_2022_Foods_11_
Author(s) : Ji J , Yu J , Xu W , Zheng Y , Zhang Y , Sun X
Ref : Foods , 11 : , 2022
Abstract : Zearalenone (ZEN) and its derivatives pose a serious threat to global food quality and animal health. The use of enzymes to degrade mycotoxins has become a popular method to counter this threat. In this study, Aspergillus niger ZEN-S-FS10 extracellular enzyme solution with ZEN-degrading effect was separated and purified to prepare the biological enzyme, FSZ, that can degrade ZEN. The degradation rate of FSZ to ZEN was 7580% (pH = 7.0, 28 degreesC). FSZ can function in a temperature range of 2838 degreesC and pH range of 2.07.0 and can also degrade ZEN derivatives (alpha-ZAL, beta-ZOL, and ZAN). According to the enzyme kinetics fitting, ZEN has a high degradation rate. FSZ can degrade ZEN in real samples of corn flour. FSZ can be obtained stably and repeatedly from the original strain. One ZEN degradation product was isolated: FSZP(C18H26O4), with a relative molecular weight of 306.18 g/mol. Amino-acid-sequencing analysis revealed that FSZ is a novel enzyme (homology < 10%). According to the results of molecular docking, ZEN and ZAN can utilize their end-terminal carbonyl groups to bind FSZ residues PHE307, THR55, and GLU129 for a high-degradation rate. However, alpha-ZAL and beta-ZOL instead contain hydroxyl groups that would prevent binding to GLU129; thus, the degradation rate is low for these derivatives.
ESTHER : Ji_2022_Foods_11_
PubMedSearch : Ji_2022_Foods_11_
PubMedID: 36141036

Title : ((E)-N-(4-(((2-Amino-5-phenylpyridin-3-yl)imino)methyl)pyridin-2-yl)cyclopropanecarboxamide) Ameliorated Abeta(1-42)-Induced Alzheimer's Disease in SD Rats by Inhibiting Oxidative Stress and Apoptosis - Ding_2021_ACS.Chem.Neurosci__
Author(s) : Ding Y , Wang X , Ji J , Zhang X , Chen M , Li S , Zhang Q , Liu P
Ref : ACS Chem Neurosci , : , 2021
Abstract : Our study investigated the protective effects of ((E)-N-(4-(((2-amino-5-phenylpyridin-3-yl)imino)methyl)pyridin-2-yl)cyclopropanecarboxamide) 9b, a novel glycogen synthase kinase-3beta (GSK-3beta) inhibitor, on the learning and memory function of rats with amyloid-beta(1-42) (Abeta(1-42))-induced Alzheimer's disease (AD) and explored the possible mechanisms. Sixty male Sprague-Dawley (SD) rats were randomly divided into five groups: the control, Abeta, donepezil, and low-dose and high-dose 9b groups. The rats in the Abeta, donepezil, and two 9b intervention groups received a single microinjection of 10 microg of Abeta(1-42) into the hippocampus followed by intragastric administration of 0.5% sodium carboxymethyl cellulose (CMC-Na), 12 (mg/kg)/d donepezil hydrochloride and 6 or 18 (mg/kg)/d compound 9b for 28 days, while the rats in the control group were treated with the vehicles. Learning and memory impairment were attenuated, the activities of superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), acetylcholinesterase (AChE), and adenosine triphosphatase (ATPase) in the brain tissue were significantly increased (p < 0.05), and the concentrations of Abeta(1-42), phospho-tau (p-tau), and malondialdehyde (MDA) in the brain tissue were significantly decreased (p < 0.05) in the compound 9b group compared to the Abeta group. In addition, compound 9b regulated the imbalance in the concentrations of neurotransmitters and alleviated severe damage and apoptosis in the brains of the rats exposed to Abeta(1-42). The novel GSK-3beta inhibitor 9b could improve learning and memory dysfunction caused by Abeta(1-42) through its antioxidant and antiapoptotic effects.
ESTHER : Ding_2021_ACS.Chem.Neurosci__
PubMedSearch : Ding_2021_ACS.Chem.Neurosci__
PubMedID: 33517657

Title : Insecticidal effect of aconitine on the rice brown planthoppers - Wei_2019_PLoS.One_14_e0221090
Author(s) : Wei S , Zhang H , Li B , Ji J , Shao X
Ref : PLoS ONE , 14 :e0221090 , 2019
Abstract : The brown planthopper, Nilaparvata lugens (Stal), severely damages rice production and develops high level resistance to several classes of insecticides. To find potential insecticidal resources is always important. As an environmentally friendly compound, aconitine exhibits potential pesticide features. In the present study, the pesticide and knockdown effects of aconitine were first tested on the brown planthopper. The results showed that the knockdown rates for an aconitine concentration of 200 ppm was 83.6%. The insecticidal LD50 was 22.68 ng/pest (95% CI, 17.75-28.99). The molecular mechanisms responding to aconitine application were analyzed through transcriptional sequencing. Compared to that of the knockdown nymphs of the brown planthoppers, the enzymes CYP3A4, UDP-glucuronosyltransferase (UGT), GST, carboxylesterase (EC3.1.1.1), and GABAergic synapse were up-regulated. We inferred that aconitine might be neurotoxic to the brown planthoppers, and the conscious nymphs resist the drug neurotoxicity through the upregulation of CYP3A4, UGT, and GABA receptor mutation. Although aconitine is not safe for mammals, it may be a leading compound to develop novel insecticides.
ESTHER : Wei_2019_PLoS.One_14_e0221090
PubMedSearch : Wei_2019_PLoS.One_14_e0221090
PubMedID: 31426056

Title : Sequencing of a Wild Apple (Malus baccata) Genome Unravels the Differences Between Cultivated and Wild Apple Species Regarding Disease Resistance and Cold Tolerance - Chen_2019_G3.(Bethesda)_9_2051
Author(s) : Chen X , Li S , Zhang D , Han M , Jin X , Zhao C , Wang S , Xing L , Ma J , Ji J , An N
Ref : G3 (Bethesda) , 9 :2051 , 2019
Abstract : Malus baccata is one of four wild apple species that can hybridize with the cultivated apple species (Malus domestica). It is widely used in high-latitude apple-producing areas as a rootstock and breeding resource because of its disease resistance, and cold tolerance. A lack of a reference genome has limited the application of M. baccata for apple breeding. We present a draft reference genome for M. baccata The assembled sequence consisting of 665 Mb, with a scaffold N50 value of 452 kb, included transposable elements (413 Mb) and 46,114 high-quality protein-coding genes. According to a genetic map derived from 390 sibling lines, 72% of the assembly and 85% of the putative genes were anchored to 17 linkage groups. Many of the M. baccata genes under positive selection pressure were associated with plant-pathogen interaction pathways. We identified 2,345 Transcription factor-encoding genes in 58 families in the M. baccata genome. Genes related to disease defense and cold tolerance were also identified. A total of 462 putative nucleotide-binding site (NBS)-leucine-rich-repeat (LRR) genes, 177 Receptor-like kinase (RLK) and 51 receptor-like proteins (RLP) genes were identified in this genome assembly. The M. baccata genome contained 3978 cold-regulated genes, and 50% of these gene promoter containing DREB motif which can be induced by CBF gene. We herein present the first M. baccata genome assembly, which may be useful for exploring genetic variations in diverse apple germplasm, and for facilitating marker-assisted breeding of new apple cultivars exhibiting resistance to disease and cold stress.
ESTHER : Chen_2019_G3.(Bethesda)_9_2051
PubMedSearch : Chen_2019_G3.(Bethesda)_9_2051
PubMedID: 31126974
Gene_locus related to this paper: malba-a0a540mnd7 , malba-a0a540lct9 , malba-a0a540lik7 , malba-a0a540lik0 , malba-a0a540lri2 , malba-a0a540lr05

Title : Triazole derivatives as inhibitors of Alzheimer's disease: Current developments and structure-activity relationships - Xu_2019_Eur.J.Med.Chem_180_656
Author(s) : Xu M , Peng Y , Zhu L , Wang S , Ji J , Rakesh KP
Ref : Eur Journal of Medicinal Chemistry , 180 :656 , 2019
Abstract : Alzheimer's disease (AD) is a well known neurodegenerative disorder alarming millions of people worldwide and the subsequent epidemiological statistics highlights the implication of the disease. AD is a multi-factorial disease, a variety of single-target directed drugs that have reached clinical trials have unsuccessful. Hence, various factors associated without set of AD have been considered in targeted drug discovery and development. Triazoles are five-membered heterocyclic scaffold due to their broad range of biological activities. The present review focuses on the recent developments in the area of medicinal chemistry to explore the diverse chemical structures of potential inhibitors of Alzheimer's disease and also look at its structure-activity relationships (SAR) studies of bioactive compounds for future discovery of suitable drug candidates. The prominence has been given on the major advancements in the medicinal brochure of this pharmacophore for the period during 2012-2019.
ESTHER : Xu_2019_Eur.J.Med.Chem_180_656
PubMedSearch : Xu_2019_Eur.J.Med.Chem_180_656
PubMedID: 31352246

Title : Cholinergic mechanisms in an organic dust model simulating an acute exacerbation in patients with COPD - Palmberg_2018_Int.J.Chron.Obstruct.Pulmon.Dis_13_3611
Author(s) : Palmberg L , Sundblad BM , Ji J , Karen J , Larsson K
Ref : Int J Chron Obstruct Pulmon Dis , 13 :3611 , 2018
Abstract : Background: Exposure in a pig barn induces airway inflammation that has similarities with the response observed in acute exacerbations in COPD. Methods: A total of 15 smokers with COPD and 15 healthy non-smokers were exposed for 2 hours in a pig barn (in vivo exposure). Symptoms were assessed, lung function measured, and blood and sputum samples taken before and after exposure. Blood neutrophils were isolated and stimulated ex vivo with dust from a pig barn and acetylcholine, and inflammatory markers were analyzed. Results: In vivo exposure caused more symptoms and greater lung function fall in COPD patients than in controls. Baseline concentrations of MMP9, TIMP1, IL6, CXCL8, in sputum and neutrophil blood count were higher in COPD patients than in controls. In vivo exposure increased MMP9, TIMP1, IL6, CXCL8, TNFalpha, and LTB4 in sputum and MMP9 and IL6 in blood, with no difference between the groups, and serum CRP increased more in COPD subjects. Expression of choline acetyltransferase and acetylcholinesterase on sputum and blood cells was similar in the groups and uninfluenced by in vivo exposure. Dust exposure ex vivo increased choline acetyltransferase expression in neutrophils, but the dust and acetylcholine response did not differ between the groups before and after in vivo exposure. Conclusion: COPD patients exposed in a pig barn experience symptoms similar to those in acute exacerbations and lung function deterioration that is unrelated to bronchial responsiveness. Cholinergic mechanisms are involved in the inflammatory response to dust, with no difference between COPD and non-smokers.
ESTHER : Palmberg_2018_Int.J.Chron.Obstruct.Pulmon.Dis_13_3611
PubMedSearch : Palmberg_2018_Int.J.Chron.Obstruct.Pulmon.Dis_13_3611
PubMedID: 30464444

Title : Cloning, expression, and functional analysis of two acetylcholinesterase genes in Spodoptera litura (Lepidoptera: Noctuidae) - Salim_2017_Comp.Biochem.Physiol.B.Biochem.Mol.Biol_206_16
Author(s) : Salim AM , Shakeel M , Ji J , Kang T , Zhang Y , Ali E , Xiao Z , Lu Y , Wan H , Li J
Ref : Comparative Biochemistry & Physiology B Biochem Mol Biol , 206 :16 , 2017
Abstract : Two acetylcholinesterase genes (SlAce1 and SlAce2) were cloned from Spodoptera litura, which is an important pest that causes widespread economic damage to vegetables and ornamental plants. We analyzed their expression patterns and compared their biological functions by using RNA interference. Our results showed that SlAce1 and SlAce2 cDNA contains 2085bp and 1917bp nucleotides and encoding proteins of 694 and 638 amino acid residues, respectively. Phylogenic analysis indicated that the lineage of SlAce genes and SlAce1 was completely different from SlAce2. Although both genes were expressed in all developmental stages and majorly in the brain. The expression levels of the both genes were suppressed by inserting their related dsRNA in the 6th instar larvae, which led to 47.3% (SlAce1) and 37.9% (SlAce2) mortality. Interestingly, the suppression of the SlAce2 transcripts also led to significant reductions in the fecundity, hatching, and offspring in the parental generation of S. litura. It is concluded that SlAce2 is responsible for the hydrolysis of acetylcholine and also plays role in female breeding, embryo progress, and the development of progeny. Considerable larval mortality was observed after both AChE genes (i.e. Ace1 and Ace2) were silenced in S. litura confirms its insecticidal effectiveness, which provided a molecular basis in biological pest control approach.
ESTHER : Salim_2017_Comp.Biochem.Physiol.B.Biochem.Mol.Biol_206_16
PubMedSearch : Salim_2017_Comp.Biochem.Physiol.B.Biochem.Mol.Biol_206_16
PubMedID: 28111266
Gene_locus related to this paper: spolt-ACHE2 , spolt-ACHE1

Title : The metastatic suppressor NDRG1 inhibits EMT, migration and invasion through interaction and promotion of caveolin-1 ubiquitylation in human colorectal cancer cells - Mi_2017_Oncogene_36_4323
Author(s) : Mi L , Zhu F , Yang X , Lu J , Zheng Y , Zhao Q , Wen X , Lu A , Wang M , Zheng M , Ji J , Sun J
Ref : Oncogene , 36 :4323 , 2017
Abstract : N-myc downstream-regulated gene 1 (NDRG1) has been reported to act as a key regulatory molecule in tumor progression-related signaling pathways, especially in tumor metastasis. However, the related mechanism has not been fully discovered yet. Herein we demonstrated that the novel molecule of cell migration and invasion, caveolin-1, has direct interaction with NDRG1 in human colorectal cancer (CRC) cells. Moreover, we discovered that NDRG1 reduces caveolin-1 protein expression through promoting its ubiquitylation and subsequent degradation via the proteasome in CRC cells. In addition, caveolin-1 mediates the suppressive function of NDRG1 in epithelial-mesenchymal transition, migration and invasion in vitro and metastasis in vivo. These results help to fulfill the potential mechanisms of NDRG1 in anti-metastatic treatment for human colorectal cancer.
ESTHER : Mi_2017_Oncogene_36_4323
PubMedSearch : Mi_2017_Oncogene_36_4323
PubMedID: 28346422
Gene_locus related to this paper: human-NDRG1

Title : alpha\/beta-Hydrolase domain-containing 6 (ABHD6) negatively regulates the surface delivery and synaptic function of AMPA receptors - Wei_2016_Proc.Natl.Acad.Sci.U.S.A_113_E2695
Author(s) : Wei M , Zhang J , Jia M , Yang C , Pan Y , Li S , Luo Y , Zheng J , Ji J , Chen J , Hu X , Xiong J , Shi Y , Zhang C
Ref : Proc Natl Acad Sci U S A , 113 :E2695 , 2016
Abstract : In the brain, AMPA-type glutamate receptors are major postsynaptic receptors at excitatory synapses that mediate fast neurotransmission and synaptic plasticity. alpha/beta-Hydrolase domain-containing 6 (ABHD6), a monoacylglycerol lipase, was previously found to be a component of AMPA receptor macromolecular complexes, but its physiological significance in the function of AMPA receptors (AMPARs) has remained unclear. The present study shows that overexpression of ABHD6 in neurons drastically reduced excitatory neurotransmission mediated by AMPA but not by NMDA receptors at excitatory synapses. Inactivation of ABHD6 expression in neurons by either CRISPR/Cas9 or shRNA knockdown methods significantly increased excitatory neurotransmission at excitatory synapses. Interestingly, overexpression of ABHD6 reduced glutamate-induced currents and the surface expression of GluA1 in HEK293T cells expressing GluA1 and stargazin, suggesting a direct functional interaction between these two proteins. The C-terminal tail of GluA1 was required for the binding between of ABHD6 and GluA1. Mutagenesis analysis revealed a GFCLIPQ sequence in the GluA1 C terminus that was essential for the inhibitory effect of ABHD6. The hydrolase activity of ABHD6 was not required for the effects of ABHD6 on AMPAR function in either neurons or transfected HEK293T cells. Thus, these findings reveal a novel and unexpected mechanism governing AMPAR trafficking at synapses through ABHD6.
ESTHER : Wei_2016_Proc.Natl.Acad.Sci.U.S.A_113_E2695
PubMedSearch : Wei_2016_Proc.Natl.Acad.Sci.U.S.A_113_E2695
PubMedID: 27114538
Gene_locus related to this paper: human-ABHD6

Title : SAR of alpha7 nicotinic receptor agonists derived from tilorone: exploration of a novel nicotinic pharmacophore - Schrimpf_2012_Bioorg.Med.Chem.Lett_22_1633
Author(s) : Schrimpf MR , Sippy KB , Briggs CA , Anderson DJ , Li T , Ji J , Frost JM , Surowy CS , Bunnelle WH , Gopalakrishnan M , Meyer MD
Ref : Bioorganic & Medicinal Chemistry Lett , 22 :1633 , 2012
Abstract : The well-known interferon-inducer tilorone was found to possess potent affinity for the agonist site of the alpha7 neuronal nicotinic receptor (K(i)=56 nM). SAR investigations determined that both basic sidechains are essential for potent activity, however active monosubstituted derivatives can also be prepared if the flexible sidechains are replaced with conformationally rigidified cyclic amines. Analogs in which the fluorenone core is replaced with either dibenzothiophene-5,5-dioxide or xanthenone also retain potent activity.
ESTHER : Schrimpf_2012_Bioorg.Med.Chem.Lett_22_1633
PubMedSearch : Schrimpf_2012_Bioorg.Med.Chem.Lett_22_1633
PubMedID: 22281189

Title : Role of alpha7 nicotinic acetylcholine receptors in regulating tumor necrosis factor-alpha (TNF-alpha) as revealed by subtype selective agonists - Li_2011_J.Neuroimmunol_239_37
Author(s) : Li J , Mathieu SL , Harris R , Ji J , Anderson DJ , Malysz J , Bunnelle WH , Waring JF , Marsh KC , Murtaza A , Olson LM , Gopalakrishnan M
Ref : Journal of Neuroimmunology , 239 :37 , 2011
Abstract : Immunological responses to protect against excessive inflammation can be regulated by the central nervous system through the cholinergic anti-inflammatory pathway wherein acetylcholine released from vagus nerves can inhibit inflammatory cytokines. Although a role for the alpha7 nicotinic acetylcholine receptor (alpha7 nAChR) in mediating this pathway has been suggested, pharmacological modulation of the pathway by selective agonists remains to be further elucidated. In this study, the role of alpha7 nAChRs in the regulation of TNF-alpha release was investigated using high affinity and selective alpha7 nAChR agonists in mouse peritoneal macrophage and human whole blood in vitro, and in mouse serum in vivo. In mouse peritoneal macrophages, LPS-induced TNF-alpha release in vitro was inhibited by a selective alpha7 nAChR agonist, A-833834 (5-[6-(5-Methyl-hexahydro-pyrrolo[3,4-c]pyrrol-2-yl)-pyridazin-3-yl]-1H-indole), and that effect was attenuated by alpha7 nAChR antagonist methyllycaconitine. The inhibitory effect of A-833834 on LPS-induced TNF-alpha release was also observed in human whole blood in vitro. I.v. LPS-induced TNF-alpha release in mouse serum was attenuated following i.p. administration of A-833834. Similarly, i.v. LPS-induced TNF-alpha release in mouse serum was also attenuated following i.p. administration of A-585539, another alpha7 nAChR agonist with limited brain penetration, suggesting that these effects are mediated by peripheral alpha7 nAChRs. A-833834 was also efficacious in suppressing TNF-alpha release in mouse serum following oral administration in zymosan-induced peritonitis. These studies collectively demonstrate that selectively targeting alpha7 nAChRs could offer a novel therapeutic modality to treat acute and chronic inflammatory disease states.
ESTHER : Li_2011_J.Neuroimmunol_239_37
PubMedSearch : Li_2011_J.Neuroimmunol_239_37
PubMedID: 21911260

Title : Syntheses and structure-activity relationship (SAR) studies of 2,5-diazabicyclo[2.2.1]heptanes as novel alpha7 neuronal nicotinic receptor (NNR) ligands - Li_2010_Bioorg.Med.Chem.Lett_20_3636
Author(s) : Li T , Bunnelle WH , Ryther KB , Anderson DJ , Malysz J , Helfrich R , Gronlien JH , Hakerud M , Peters D , Schrimpf MR , Gopalakrishnan M , Ji J
Ref : Bioorganic & Medicinal Chemistry Lett , 20 :3636 , 2010
Abstract : Biaryl substituted 2,5-diazabicyclo[2.2.1]heptanes have been synthesized and tested for their affinity toward alpha7 neuronal nicotinic receptors (NNRs). SAR studies established that 5-N-methyl substituent, heteroaryl linker and the nature of terminal aryl group are critical for the ligand to achieve potent alpha7 NNR agonist activity.
ESTHER : Li_2010_Bioorg.Med.Chem.Lett_20_3636
PubMedSearch : Li_2010_Bioorg.Med.Chem.Lett_20_3636
PubMedID: 20472430

Title : Enhancement of attentional performance by selective stimulation of alpha4beta2(*) nAChRs: underlying cholinergic mechanisms - Howe_2010_Neuropsychopharmacology_35_1391
Author(s) : Howe WM , Ji J , Parikh V , Williams S , Mocaer E , Trocme-Thibierge C , Sarter M
Ref : Neuropsychopharmacology , 35 :1391 , 2010
Abstract : Impairments in attention are a major component of the cognitive symptoms of neuropsychiatric and neurodegenerative disorders. Using an operant sustained attention task (SAT), including a distractor condition (dSAT), we assessed the putative pro-attentional effects of the selective alpha4beta2(*) nicotinic acetylcholine receptor (nAChR) agonist S 38232 in comparison with the non-selective agonist nicotine. Neither drug benefited SAT performance. However, in interaction with the increased task demands implemented by distractor presentation, the selective agonist, but not nicotine, enhanced the detection of signals during the post-distractor recovery period. This effect is consistent with the hypothesis that second-long increases in cholinergic activity ('transients') mediate the detection of cues and that nAChR agonists augment such transients. Electrochemical recordings of prefrontal cholinergic transients evoked by S 38232 and nicotine indicated that the alpha4beta2(*) nAChR agonist evoked cholinergic transients that were characterized by a faster rise time and more rapid decay than those evoked by nicotine. Blockade of the alpha7 nAChR 'sharpens' nicotine-evoked transients; therefore, we determined the effects of co-administration of nicotine and the alpha7 nAChR antagonist methyllycaconitine on dSAT performance. Compared with vehicle and nicotine alone, this combined treatment significantly enhanced the detection of signals. These results indicate that compared with nicotine, alpha4beta2(*) nAChR agonists significantly enhance attentional performance and that the dSAT represents a useful behavioral screening tool. The combined behavioral and electrochemical evidence supports the hypothesis that nAChR agonist-evoked cholinergic transients, which are characterized by rapid rise time and fast decay, predict robust drug-induced enhancement of attentional performance.
ESTHER : Howe_2010_Neuropsychopharmacology_35_1391
PubMedSearch : Howe_2010_Neuropsychopharmacology_35_1391
PubMedID: 20147893

Title : Prefrontal beta2 subunit-containing and alpha7 nicotinic acetylcholine receptors differentially control glutamatergic and cholinergic signaling - Parikh_2010_J.Neurosci_30_3518
Author(s) : Parikh V , Ji J , Decker MW , Sarter M
Ref : Journal of Neuroscience , 30 :3518 , 2010
Abstract : One-second-long increases in prefrontal cholinergic activity ("transients") were demonstrated previously to be necessary for the incorporation of cues into ongoing cognitive processes ("cue detection"). Nicotine and, more robustly, selective agonists at alpha4beta2* nicotinic acetylcholine receptors (nAChRs) enhance cue detection and attentional performance by augmenting prefrontal cholinergic activity. The present experiments determined the role of beta2-containing and alpha7 nAChRs in the generation of prefrontal cholinergic and glutamatergic transients in vivo. Transients were evoked by nicotine, the alpha4beta2* nAChR agonist ABT-089 [2-methyl-3-(2-(S)-pyrrolindinylmethoxy) pyridine dihydrochloride], or the alpha7 nAChR agonist A-582941 [2-methyl-5-(6-phenyl-pyridazin-3-yl)-octahydro-pyrrolo[3,4-c]pyrrole]. Transients were recorded in mice lacking beta2 or alpha7 nAChRs and in rats after removal of thalamic glutamatergic or midbrain dopaminergic inputs to prefrontal cortex. The main results indicate that stimulation of alpha4beta2* nAChRs evokes glutamate release and that the presence of thalamic afferents is necessary for the generation of cholinergic transients. ABT-089-evoked transients were completely abolished in mice lacking beta2* nAChRs. The amplitude, but not the decay rate, of nicotine-evoked transients was reduced by beta2* knock-out. Conversely, in mice lacking the alpha7 nAChR, the decay rate, but not the amplitude, of nicotine-evoked cholinergic and glutamatergic transients was attenuated. Substantiating the role of alpha7 nAChR in controlling the duration of release events, stimulation of alpha7 nAChR produced cholinergic transients that lasted 10- to 15-fold longer than those evoked by nicotine. alpha7 nAChR-evoked cholinergic transients are mediated in part by dopaminergic activity. Prefrontal alpha4beta2* nAChRs play a key role in evoking and facilitating the transient glutamatergic-cholinergic interactions that are necessary for cue detection and attentional performance.
ESTHER : Parikh_2010_J.Neurosci_30_3518
PubMedSearch : Parikh_2010_J.Neurosci_30_3518
PubMedID: 20203212

Title : In vitro pharmacological characterization of a novel selective alpha7 neuronal nicotinic acetylcholine receptor agonist ABT-107 - Malysz_2010_J.Pharmacol.Exp.Ther_334_863
Author(s) : Malysz J , Anderson DJ , Gronlien JH , Ji J , Bunnelle WH , Hakerud M , Thorin-Hagene K , Ween H , Helfrich R , Hu M , Gubbins E , Gopalakrishnan S , Puttfarcken PS , Briggs CA , Li J , Meyer MD , Dyhring T , Ahring PK , Nielsen EO , Peters D , Timmermann DB , Gopalakrishnan M
Ref : Journal of Pharmacology & Experimental Therapeutics , 334 :863 , 2010
Abstract : Enhancement of alpha7 nicotinic acetylcholine receptor (nAChR) activity is considered a therapeutic approach for ameliorating cognitive deficits present in Alzheimer's disease and schizophrenia. In this study, we describe the in vitro profile of a novel selective alpha7 nAChR agonist, 5-(6-[(3R)-1-azabicyclo[2,2,2]oct-3-yloxy]pyridazin-3-yl)-1H-indole (ABT-107). ABT-107 displayed high affinity binding to alpha7 nAChRs [rat or human cortex, [(3)H](1S,4S)-2,2-dimethyl-5-(6-phenylpyridazin-3-yl)-5-aza-2-azoniabicyclo[2.2.1 ]heptane (A-585539), K(i) = 0.2-0.6 nM or [(3)H]methyllycaconitine (MLA), 7 nM] that was at least 100-fold selective versus non-alpha7 nAChRs and other receptors. Functionally, ABT-107 did not evoke detectible currents in Xenopus oocytes expressing human or nonhuman alpha3beta4, chimeric (alpha6/alpha3)beta4, or 5-HT(3A) receptors, and weak or negligible Ca(2+) responses in human neuroblastoma IMR-32 cells (alpha3* function) and human alpha4beta2 and alpha4beta4 nAChRs expressed in human embryonic kidney 293 cells. ABT-107 potently evoked human and rat alpha7 nAChR current responses in oocytes (EC(50), 50-90 nM total charge, approximately 80% normalized to acetylcholine) that were enhanced by the positive allosteric modulator (PAM) 4-[5-(4-chloro-phenyl)-2-methyl-3-propionyl-pyrrol-1-yl]-benzenesulfonamide (A-867744). In rat hippocampus, ABT-107 alone evoked alpha7-like currents, which were inhibited by the alpha7 antagonist MLA. In dentate gyrus granule cells, ABT-107 enhanced spontaneous inhibitory postsynaptic current activity when coapplied with A-867744. In the presence of an alpha7 PAM [A-867744 or N-[(3R)-1-azabicyclo[2.2.2]oct-3-yl]-4-chlorobenzamide hydrochloride (PNU-120596)], the addition of ABT-107 elicited MLA-sensitive alpha7 nAChR-mediated Ca(2+) signals in IMR-32 cells and rat cortical cultures and enhanced extracellular signal-regulated kinase phosphorylation in differentiated PC-12 cells. ABT-107 was also effective in protecting rat cortical cultures against glutamate-induced toxicity. In summary, ABT-107 is a selective high affinity alpha7 nAChR agonist suitable for characterizing the roles of this subtype in pharmacological studies.
ESTHER : Malysz_2010_J.Pharmacol.Exp.Ther_334_863
PubMedSearch : Malysz_2010_J.Pharmacol.Exp.Ther_334_863
PubMedID: 20504915

Title : Poster: Role of alpha-7 nicotinic acetylcholine receptors in regulating tumor necrosis factor-alpha (TNF-alpha) as Revealed by subtype selective agonists -
Author(s) : Li J , Mathieu SL , Harris R , Ji J , Anderson DJ , Malysz J , Bunnelle WH , Waring JF , Marsh KC , Murtaza A , Olson LM , Gopalakrishnan M
Ref : Biochemical Pharmacology , 78 :924 , 2009
PubMedID:

Title : Lipase-catalyzed esterification of conjugated linoleic acid with L-carnitine in solvent-free system and acetonitrile - Li_2007_Bioprocess.Biosyst.Eng_30_331
Author(s) : Li Z , Yang D , Jiang L , Ji J , Ji H , Zeng X
Ref : Bioprocess Biosyst Eng , 30 :331 , 2007
Abstract : Lipase-catalyzed esterification of conjugated linoleic acid (CLA) with L-carnitine in solvent-free system and acetonitrile was studied. Three lipases (Novzym 435, Amamo AY30 and Amano AYS) have been assayed as suitable biocatalysts in the reaction. It was found that Amano AY30 was the most effective biocatalyst in both solvent-free system and acetonitrile. The conversion rate varied from 8.05 to 60.9% in terms of reaction conditions such as the amount of lipase, the presence of water, the amount of molecular sieves and reaction time. The conversions of substrate in solvent-free system were higher than that in acetonitrile. When the substrates were 1 mmol CLA and 1 mmol L-carnitine, the maximum conversion (60.9%) was obtained in solvent-free system with 150 mg lipase AY30, 50% water content and 150 mg molecular sieves at the reaction time of 24 h. A novel CLA ester product was successfully isolated and characterized by ESI-MS and (1)H NMR.
ESTHER : Li_2007_Bioprocess.Biosyst.Eng_30_331
PubMedSearch : Li_2007_Bioprocess.Biosyst.Eng_30_331
PubMedID: 17503088

Title : A-366833: a novel nicotinonitrile-substituted 3,6-diazabicyclo[3.2.0]-heptane alpha4beta2 nicotinic acetylcholine receptor selective agonist: Synthesis, analgesic efficacy and tolerability profile in animal models - Ji_2007_Biochem.Pharmacol_74(8)_1253
Author(s) : Ji J , Bunnelle WH , Anderson DJ , Faltynek C , Dyhring T , Ahring PK , Rueter LE , Curzon P , Buckley MJ , Marsh KC , Kempf-Grote A , Meyer MD
Ref : Biochemical Pharmacology , 74 :1253 , 2007
Abstract : 5-[(1R,5S)-3,6-Diazabicyclo[3.2.0]heptan-6-yl]nicotinonitrile (A-366833) is a novel nicotinic acetylcholine receptor (nAChR) ligand that binds to the agonist-binding site ([3H]-cytisine) with Ki value of 3.1 nM and exhibits agonist selectivity at alpha4beta2 nAChR relative to the alpha3beta4 nAChR subtype. The analgesic effects of A-366833 were examined across a variety of animal models including the mouse model of writhing pain (abdominal constriction), the rat models of acute thermal (hot box), persistent chemical (formalin) and neuropathic (spinal nerve ligation, SNL) pain. In the abdominal constriction model, A-366833 was effective at doses ranging from 0.062 to 0.62 micromol/kg (i.p.). In addition, A-366833 demonstrated significant effects in acute thermal pain (6.2-19.0 micromol/kg, i.p.), formalin (1.9-19 micromol/kg i.p.) and SNL (1.9-19 micromol/kg i.p.) models. The systemic effects of A-366833 were attenuated by pretreatment with mecamylamine (5 micromol/kg i.p.) in both the formalin and SNL models, suggesting that the analgesic effects of A-366833 in models of persistent nociceptive and neuropathic pain are mediated by activation of nAChRs. Pharmacokinetic investigations of A-366833 in rat revealed moderate brain:plasma distribution, half-life of 1.5h and excellent oral bioavailability of 73%. Comparison of peak plasma levels at the minimal effective doses across rat models of acute thermal pain, formalin and SNL with the maximal exposure that does not evoke emesis in ferret revealed therapeutic margins ranging from 6- to 22-fold. These studies indicate that compounds like A-366833 with improved agonist selectivity at alpha4beta2 vs. alpha3beta4 nAChR can elicit a broad spectrum of analgesic efficacy without concurrent adverse effects.
ESTHER : Ji_2007_Biochem.Pharmacol_74(8)_1253
PubMedSearch : Ji_2007_Biochem.Pharmacol_74(8)_1253
PubMedID: 17854775

Title : The Genomes of Oryza sativa: a history of duplications - Yu_2005_PLoS.Biol_3_e38
Author(s) : Yu J , Wang J , Lin W , Li S , Li H , Zhou J , Ni P , Dong W , Hu S , Zeng C , Zhang J , Zhang Y , Li R , Xu Z , Li X , Zheng H , Cong L , Lin L , Yin J , Geng J , Li G , Shi J , Liu J , Lv H , Li J , Deng Y , Ran L , Shi X , Wang X , Wu Q , Li C , Ren X , Li D , Liu D , Zhang X , Ji Z , Zhao W , Sun Y , Zhang Z , Bao J , Han Y , Dong L , Ji J , Chen P , Wu S , Xiao Y , Bu D , Tan J , Yang L , Ye C , Xu J , Zhou Y , Yu Y , Zhang B , Zhuang S , Wei H , Liu B , Lei M , Yu H , Li Y , Xu H , Wei S , He X , Fang L , Huang X , Su Z , Tong W , Tong Z , Ye J , Wang L , Lei T , Chen C , Chen H , Huang H , Zhang F , Li N , Zhao C , Huang Y , Li L , Xi Y , Qi Q , Li W , Hu W , Tian X , Jiao Y , Liang X , Jin J , Gao L , Zheng W , Hao B , Liu S , Wang W , Yuan L , Cao M , McDermott J , Samudrala R , Wong GK , Yang H
Ref : PLoS Biol , 3 :e38 , 2005
Abstract : We report improved whole-genome shotgun sequences for the genomes of indica and japonica rice, both with multimegabase contiguity, or almost 1,000-fold improvement over the drafts of 2002. Tested against a nonredundant collection of 19,079 full-length cDNAs, 97.7% of the genes are aligned, without fragmentation, to the mapped super-scaffolds of one or the other genome. We introduce a gene identification procedure for plants that does not rely on similarity to known genes to remove erroneous predictions resulting from transposable elements. Using the available EST data to adjust for residual errors in the predictions, the estimated gene count is at least 38,000-40,000. Only 2%-3% of the genes are unique to any one subspecies, comparable to the amount of sequence that might still be missing. Despite this lack of variation in gene content, there is enormous variation in the intergenic regions. At least a quarter of the two sequences could not be aligned, and where they could be aligned, single nucleotide polymorphism (SNP) rates varied from as little as 3.0 SNP/kb in the coding regions to 27.6 SNP/kb in the transposable elements. A more inclusive new approach for analyzing duplication history is introduced here. It reveals an ancient whole-genome duplication, a recent segmental duplication on Chromosomes 11 and 12, and massive ongoing individual gene duplications. We find 18 distinct pairs of duplicated segments that cover 65.7% of the genome; 17 of these pairs date back to a common time before the divergence of the grasses. More important, ongoing individual gene duplications provide a never-ending source of raw material for gene genesis and are major contributors to the differences between members of the grass family.
ESTHER : Yu_2005_PLoS.Biol_3_e38
PubMedSearch : Yu_2005_PLoS.Biol_3_e38
PubMedID: 15685292
Gene_locus related to this paper: orysa-Q7XTC5 , orysa-Q852M6 , orysa-Q8GSE8 , orysa-Q9S7P1 , orysa-Q9FYP7 , orysa-Q5ZBH3 , orysa-Q5ZA26 , orysa-Q5JLP6 , orysa-Q8H5P9 , orysa-Q8H5P5 , orysa-Q7F1Y5 , orysa-Q949C9 , orysa-cbp1 , orysa-cbp3 , orysa-cbpx , orysa-Q33B71 , orysa-Q8GSJ3 , orysa-LPL1 , orysa-Q6YSZ8 , orysa-Q8S5X5 , orysa-Q8LIG3 , orysa-Q6K7F5 , orysa-Q7F1B1 , orysa-Q8H4S9 , orysa-Q69UB1 , orysa-Q9FW17 , orysa-Q337C3 , orysa-Q7F959 , orysa-Q84QZ6 , orysa-Q84QY7 , orysa-Q851E3 , orysa-Q6YTH5 , orysa-Q0JK71 , orysa-Q8S1D9 , orysa-Q5N8V4 , orysa-Q0JCY4 , orysa-Q8GTK2 , orysa-B9EWJ8 , orysa-Q8H3K6 , orysa-Q6ZDG8 , orysa-Q6ZDG6 , orysa-Q6ZDG5 , orysa-Q6ZDG4 , orysa-Q5NAI4 , orysa-Q658B2 , orysa-Q5JMQ8 , orysa-Q5QMD9 , orysa-Q5N7L1 , orysa-Q8RYV9 , orysa-Q8H3R3 , orysa-Q5SNH3 , orysa-Q8W0F0 , orysa-pir7a , orysa-pir7b , orysa-q2qlm4 , orysa-q2qm78 , orysa-q2qm82 , orysa-q2qn31 , orysa-q2qnj4 , orysa-q2qnt9 , orysa-q2qur1 , orysa-q2qx94 , orysa-q2qyi1 , orysa-q2qyj1 , orysa-q2r051 , orysa-q2r077 , orysa-q2ram0 , orysa-q2rat1 , orysa-q2rbb3 , orysa-Q4VWY7 , orysa-q5na00 , orysa-q5nbu1 , orysa-Q5QLC0 , orysa-q5smv5 , orysa-Q5VP27 , orysa-q5vrt2 , orysa-q5w6c5 , orysa-q5z5a3 , orysa-q5z9i2 , orysa-q5z417 , orysa-q5z901 , orysa-Q5ZAM8 , orysa-Q5ZBI5 , orysa-Q5ZCR3 , orysa-q6atz0 , orysa-q6ave2 , orysa-q6f358 , orysa-q6h6s1 , orysa-q6h7i6 , orysa-q6i5q3 , orysa-q6i5u7 , orysa-q6j657 , orysa-q6k3d9 , orysa-q6k4q2 , orysa-q6k880 , orysa-q6l5b6 , orysa-Q6L5F5 , orysa-q6l556 , orysj-q6yse8 , orysa-q6yy42 , orysa-q6yzk1 , orysa-q6z8b1 , orysa-q6z995 , orysa-q6zc62 , orysa-q6zia4 , orysa-q6zjq6 , orysa-q7x7y5 , orysa-Q7XC50 , orysa-q7xej4 , orysa-q7xem8 , orysa-q7xkj9 , orysa-q7xr62 , orysa-q7xr63 , orysa-q7xr64 , orysa-q7xsg1 , orysa-q7xsq2 , orysa-q7xts6 , orysa-q7xv53 , orysa-Q7XVB5 , orysa-Q8L562 , orysa-Q8LQS5 , orysa-Q8RZ40 , orysa-Q8RZ79 , orysa-Q8S0U8 , orysa-Q8S0V0 , orysa-Q8S125 , orysa-Q8SAY7 , orysa-Q8SAY9 , orysa-Q8W3C6 , orysa-Q8W3F2 , orysa-Q8W3F4 , orysa-Q8W3F6 , orysa-Q9LHX5 , orysa-q33aq0 , orysa-q53lh1 , orysa-q53m20 , orysa-q53nd8 , orysa-q60e79 , orysa-q60ew8 , orysa-q67iz2 , orysa-q67iz3 , orysa-q67iz7 , orysa-q67iz8 , orysa-q67j02 , orysa-q67j05 , orysa-q67j07 , orysa-q67j09 , orysa-q67j10 , orysa-q67tr6 , orysa-q67tv0 , orysa-q67uz1 , orysa-q67v34 , orysa-q67wz5 , orysa-q69j38 , orysa-q69k08 , orysa-q69md7 , orysa-q69me0 , orysa-q69pf3 , orysa-q69ti3 , orysa-q69xr2 , orysa-q69y12 , orysa-q69y21 , orysa-q75hy2 , orysa-q75i01 , orysa-Q94JD7 , orysa-Q0J0A4 , orysa-q651a8 , orysa-q651z3 , orysa-q652g4 , orysa-q688m0 , orysa-q688m8 , orysa-q688m9 , orysa-Q6H8G1 , orysi-a2wn01 , orysi-a2xc83 , orysi-a2yh83 , orysi-a2z179 , orysi-a2zef2 , orysi-b8a7e6 , orysi-b8a7e7 , orysi-b8bfe5 , orysi-b8bhp9 , orysj-a3b9l8 , orysj-b9eub8 , orysj-b9eya5 , orysj-b9fi05 , orysj-b9fkb0 , orysj-b9fn42 , orysj-b9gbb7 , orysj-cgep , orysj-PLA7 , orysj-q0d4u5 , orysj-q0djj0 , orysj-q0jaf0 , orysj-q5jl22 , orysj-q5jlw7 , orysj-q5z419 , orysj-q6h7q9 , orysj-q6yvk6 , orysj-q6z6i1 , orysj-q7f8x1 , orysj-q7xcx3 , orysj-q9fwm6 , orysj-q10j20 , orysj-q10ss2 , orysj-q69uw6 , orysj-q94d71 , orysj-q338c0 , orysi-b8bly4 , orysj-b9gbs4 , orysi-a2zb88 , orysj-b9gbs1 , orysi-b8b698 , orysj-pla4 , orysj-pla1

Title : Hepatic lipase gene -514 C\/T polymorphism and premature coronary heart disease - Ji_2002_J.Cardiovasc.Risk_9_105
Author(s) : Ji J , Herbison CE , Mamotte CD , Burke V , Taylor RR , van Bockxmeer FM
Ref : J Cardiovasc Risk , 9 :105 , 2002
Abstract : BACKGROUND: A common polymorphism in the hepatic lipase (HL) gene promoter, -514C/T, affecting enzyme activity, has been associated with alterations in plasma lipoprotein levels. However a relationship with coronary heart disease (CHD) is less well documented. DESIGN AND
METHODS: We studied HL -514 C/T in 562 Caucasian CHD patients aged under 50 years and in 642 Caucasian community recruited subjects without historical evidence of CHD.
RESULTS: Male CHD subjects (n = 490) had a 41% carrier rate for the C to T substitution, compared with 33% in corresponding controls (n = 330), [OR = 1.42 (95% CI:1.06-1.90), P < 0.02], T allele frequencies being 0.231 and 0.177 respectively [OR = 1.39 (1.08-1.78), P < 0.01]. In male CHD subjects, the T allele was associated with higher HDL-cholesterol (HDL-C) (CC: 0.95 +/- 0.24 (SD); CT: 1.04 +/- 0.41; TT: 1.01 +/- 0.20 mmol/l, P = 0.02, ANOVA) but the trend was not significant in females. In male CHD patients the T allele was more frequently encountered in those with high (> 4.5 mmol/l) than in those with low triglycerides [68% vs. 39%, OR = 3.13 (1.54-6.67), P = 0.001]. In community control subjects, the T allele was associated with a trend to higher HDL-C levels, the significance varying between subgroups while, in males, serum total and LDL-cholesterol were significantly lower in T homozygotes than in the other two genotypes (LDL-C: 2.73 +/- 0.63 vs. 3.56 +/- 0.95 mmol/l; P = 0.01). During the course of this study, a previously unreported promoter region polymorphism was found exclusively on -514C chromosomes (-592A/G, A allele frequency 0.108, 95% CI 0.09 - 0.126). It can lead to mistyping of C as T alleles in C/T heterozygotes, resulting in overestimation of -514 T homozygotes.
CONCLUSIONS: The T allele of the hepatic lipase -514 C/T polymorphism is associated with changes in plasma lipids. The superficially paradoxical predisposition to CHD in males is attributable to impairment of TG rich lipoprotein metabolism and reverse cholesterol transport.
ESTHER : Ji_2002_J.Cardiovasc.Risk_9_105
PubMedSearch : Ji_2002_J.Cardiovasc.Risk_9_105
PubMedID: 12006918