Ohta Y

References (15)

Title : Characterization of a poly(butylene adipate- co -terephthalate) hydrolase from the mesophilic actinobacteria Rhodococcus fascians - Soulenthone_2021_Polym.Degrad.Stab_184_109481
Author(s) : Soulenthone P , Tachibana Y , Suzuki M , Mizuno T , Ohta Y , Kasuya KI
Ref : Polymer Degradation and Stability , 154 :109481 , 2021
Abstract : Poly(butylene adipate- co -terephthalate) (PBAT) possesses excellent film-forming ability and biodegrad- ability. Therefore, it is considered to be a promising mulching film material that eliminates the need for recovery. In the applications that require PBAT degradation in the field after use, it is important to un- derstand the biodegradation mechanism at moderate temperatures. We have previously isolated from the soil the mesophilic actinobacteria Rhodococcus fascians NKCM2511 that biodegraded PBAT under moderate temperature conditions (20-30 C). In this study, to clarify the mechanism of PBAT degradation by the strain NKCM2511, a DNA fragment carrying the gene pbath Rf responsible for the PBAT degradation activity was cloned. The gene encoded a 216-amino-acid-long protein designated as PBATH Rf . Homology modeling revealed that PBATH Rf belongs to the alpha/ betahydrolase fold family, lacking the lid domain covering the active site. PBATH Rf degraded PBAT film at 30 C at the rate of 0.10 +/- 0.03 mg/cm 2 /d and was capable of degrad- ing several other aliphatic polyester films. Liquid chromatography revealed that PBATH Rf preferentially cleaved the ester bond between 1,4-butanediol and adipic acid rather than that between 1,4-butanediol and terephthalic acid (T). This characteristic of PBATH Rf may explain the low degradation rate of the aliphatic - aromatic copolyester PBAT, compared to the rate of degradation of aliphatic polyesters without T. In addition, liquid chromatography showed that PBATH Rf released T, mono(2-hydroxyethyl) terephthalic acid, and bis(2-hydroxybutyl) terephthalate from an amorphous poly(ethylene terephthalate) (PET) film. However, no significant change in the PET film surface after the treatment with PBATH Rf was found by scanning electron microscopy. This is the first report of an enzyme from the mesophilic actinobacteria Rhodococcus fascians that can hydrolyze various polyesters, including PBAT, and catalyze hydrolysis on the surface of an amorphous PET film. This study also provides insight into the biodegradation mechanism of PBAT in the actual field as it describes an enzyme from a naturally occurring organism that acts in the medium temperature range.
ESTHER : Soulenthone_2021_Polym.Degrad.Stab_184_109481
PubMedSearch : Soulenthone_2021_Polym.Degrad.Stab_184_109481
PubMedID:
Gene_locus related to this paper: rhofa-a0a7i8e2z4

Title : Degradation of ester linkages in rice straw components by Sphingobium species recovered from the sea bottom using a non-secretory tannase-family alpha\/beta hydrolase - Ohta_2021_Environ.Microbiol__
Author(s) : Ohta Y , Katsumata M , Kurosawa K , Takaki Y , Nishimura H , Watanabe T , Kasuya KI
Ref : Environ Microbiol , : , 2021
Abstract : Microbial decomposition of allochthonous plant components imported into the aquatic environment is one of the vital steps of the carbon cycle on earth. To expand the knowledge of the biodegradation of complex plant materials in aquatic environments, we recovered a sunken wood from the bottom of Otsuchi Bay, situated in northeastern Japan in 2012. We isolated Sphingobium with high ferulic acid esterase activity. The strain, designated as OW59, grew on various aromatic compounds and sugars, occurring naturally in terrestrial plants. A genomic study of the strain suggested its role in degrading hemicelluloses. We identified a gene encoding a non-secretory tannase-family alpha/beta hydrolase, which exhibited ferulic acid esterase activity. This enzyme shares the consensus catalytic triad (Ser-His-Asp) within the tannase family block X in the ESTHER database. The molecules, which had the same calculated elemental compositions, were produced consistently in both the enzymatic and microbial degradation of rice straw crude extracts. The non-secretory tannase-family alpha/beta hydrolase activity may confer an important phenotypic feature on the strain to accelerate plant biomass degradation. Our study provides insights into the underlying biodegradation process of terrestrial plant polymers in aquatic environments. This article is protected by copyright. All rights reserved.
ESTHER : Ohta_2021_Environ.Microbiol__
PubMedSearch : Ohta_2021_Environ.Microbiol__
PubMedID: 33939871
Gene_locus related to this paper: sphxe-a0a401IYY6

Title : Therapeutic effects of drug switching between acetylcholinesterase inhibitors in patients with Alzheimer's disease - Ohta_2017_Geriatr.Gerontol.Int_17_1843
Author(s) : Ohta Y , Darwish M , Hishikawa N , Yamashita T , Sato K , Takemoto M , Abe K
Ref : Geriatr Gerontol Int , 17 :1843 , 2017
Abstract : AIM: To evaluate the therapeutic effects of switching from one acetylcholinesterase inhibitor (ChEI), donepezil, galantamine or rivastigmine, to another in Alzheimer's disease patients. METHODS: We retrospectively enrolled 171 Alzheimer's disease patients, whose ChEI medication was changed. The patients were evaluated on three major aspects of dementia - cognitive, affective and activities of daily living (ADL) measures - at 6 months (M) before the drug switch, at the time of drug switch (baseline), and at 3 M and 6 M after the drug switch. RESULTS: The doses of the three ChEI were significantly lower at 6 M after the switch compared with the pre-switch doses. Improvements in apathy were found at 3 M when switching from donepezil to galantamine, but not to rivastigmine, but this switch had adverse effects on ADL. Improvements in cognitive scores at 3 M were also found when switching from galantamine to rivastigmine, but not to donepezil. However, both of these changes improved Abe's Behavioral and Psychological Symptoms of Dementia scores (ABS), except ADL. Switching from rivastigmine to donepezil worsened ABS at 6 M, but preserved cognitive and ADL scores. CONCLUSIONS: The present study suggests that despite a relatively lower dose of ChEI after the switch, switching from donepezil or rivastigmine preserved cognitive functions for at least 6 M. Switching from galantamine to rivastigmine improved Mini-Mental State Examination and ABS at 3 M, but did not improve ADL scores. Geriatr Gerontol Int 2017; 17: 1843-1848.
ESTHER : Ohta_2017_Geriatr.Gerontol.Int_17_1843
PubMedSearch : Ohta_2017_Geriatr.Gerontol.Int_17_1843
PubMedID: 28060449

Title : Chronic Cerebral Hypoperfusion Accelerates Alzheimer's Disease Pathology with Cerebrovascular Remodeling in a Novel Mouse Model - Zhai_2016_J.Alzheimers.Dis_53_893
Author(s) : Zhai Y , Yamashita T , Nakano Y , Sun Z , Shang J , Feng T , Morihara R , Fukui Y , Ohta Y , Hishikawa N , Abe K
Ref : J Alzheimers Dis , 53 :893 , 2016
Abstract : Recently, aging societies have been showing an increasingly strong relationship between Alzheimer's disease (AD) and chronic cerebral hypoperfusion (HP). In the present study, we created a new mouse model for AD with HP, and investigated its clinical and pathological characteristics. Alzheimer's disease transgenic mice (APP23) were subjected to bilateral common carotid arteries stenosis with ameroid constrictors for slowly progressive cerebral HP. In contrast to simple APP23 mice, cerebral HP exacerbated motor and cognitive dysfunctions with white matter lesions and meningo-parenchymal amyloid-beta (Abeta) burdens. Strong cerebrovascular inflammation and severe amyloid angiopathy with cerebrovascular remodeling were also observed in APP23 + HP mouse brains. An acetylcholinesterase inhibitor galantamine improved such clinical dysfunctions, retrieved above neuropathological characteristics, and enhanced nicotinic acetylcholine receptor (nAChR)-binding activity. The present study demonstrates that chronic cerebral HP enhanced cognitive/motor dysfunctions with parenchymal/cerebrovascular Abeta accumulation and cerebrovascular remodeling. These neuropathological abnormalities were greatly ameliorated by galantamine treatment associated with nAChR-mediated neuroprotection by allosterically potentiating ligand action.
ESTHER : Zhai_2016_J.Alzheimers.Dis_53_893
PubMedSearch : Zhai_2016_J.Alzheimers.Dis_53_893
PubMedID: 27314529

Title : Genome evolution in the allotetraploid frog Xenopus laevis - Session_2016_Nature_538_336
Author(s) : Session AM , Uno Y , Kwon T , Chapman JA , Toyoda A , Takahashi S , Fukui A , Hikosaka A , Suzuki A , Kondo M , van Heeringen SJ , Quigley I , Heinz S , Ogino H , Ochi H , Hellsten U , Lyons JB , Simakov O , Putnam N , Stites J , Kuroki Y , Tanaka T , Michiue T , Watanabe M , Bogdanovic O , Lister R , Georgiou G , Paranjpe SS , van Kruijsbergen I , Shu S , Carlson J , Kinoshita T , Ohta Y , Mawaribuchi S , Jenkins J , Grimwood J , Schmutz J , Mitros T , Mozaffari SV , Suzuki Y , Haramoto Y , Yamamoto TS , Takagi C , Heald R , Miller K , Haudenschild C , Kitzman J , Nakayama T , Izutsu Y , Robert J , Fortriede J , Burns K , Lotay V , Karimi K , Yasuoka Y , Dichmann DS , Flajnik MF , Houston DW , Shendure J , DuPasquier L , Vize PD , Zorn AM , Ito M , Marcotte EM , Wallingford JB , Ito Y , Asashima M , Ueno N , Matsuda Y , Veenstra GJ , Fujiyama A , Harland RM , Taira M , Rokhsar DS
Ref : Nature , 538 :336 , 2016
Abstract : To explore the origins and consequences of tetraploidy in the African clawed frog, we sequenced the Xenopus laevis genome and compared it to the related diploid X. tropicalis genome. We characterize the allotetraploid origin of X. laevis by partitioning its genome into two homoeologous subgenomes, marked by distinct families of 'fossil' transposable elements. On the basis of the activity of these elements and the age of hundreds of unitary pseudogenes, we estimate that the two diploid progenitor species diverged around 34 million years ago (Ma) and combined to form an allotetraploid around 17-18 Ma. More than 56% of all genes were retained in two homoeologous copies. Protein function, gene expression, and the amount of conserved flanking sequence all correlate with retention rates. The subgenomes have evolved asymmetrically, with one chromosome set more often preserving the ancestral state and the other experiencing more gene loss, deletion, rearrangement, and reduced gene expression.
ESTHER : Session_2016_Nature_538_336
PubMedSearch : Session_2016_Nature_538_336
PubMedID: 27762356
Gene_locus related to this paper: xenla-a0a1l8f4t7 , xenla-a0a1l8fbc6 , xenla-a0a1l8fct2 , xenla-q2tap9 , xenla-q4klb6 , xenla-q5xh09 , xenla-q6ax59 , xenla-q6dcw6 , xenla-q6irp4 , xenla-q6pad5 , xenla-q7sz70 , xenla-Q7ZXQ6 , xenla-q66kx1 , xenla-q640y7 , xenla-q642r3 , xenla-Q860X9 , xenla-BCHE2 , xenla-a0a1l8g7v4 , xenla-a0a1l8g1u7 , xenla-a0a1l8fmc5 , xenla-a0a1l8g467 , xenla-a0a1l8g4e4 , xenla-a0a1l8ga66 , xenla-a0a1l8gaw4 , xenla-a0a1l8gt68 , xenla-a0a1l8h0b2 , xenla-a0a1l8fdr1 , xenla-a0a1l8fdt7 , xenla-a0a1l8fi72 , xenla-a0a1l8fi73 , xenla-a0a1l8fi77 , xenla-a0a1l8fi96 , xenla-a0a1l8hc38 , xenla-a0a1l8hn27 , xenla-a0a1l8hry6 , xenla-a0a1l8hw96 , xenla-a0a1l8i2x6 , xenla-a0a1l8hei7 , xenla-a0a1l8gnd1 , xenla-a0a1l8i2g3 , xenla-a0a1l8hdn0 , xenla-a0a1l8h622

Title : Draft Genome Sequence of Novosphingobium sp. Strain MBES04, Isolated from Sunken Wood from Suruga Bay, Japan - Ohta_2015_Genome.Announc_3_e01373
Author(s) : Ohta Y , Nishi S , Kobayashi K , Tsubouchi T , Iida K , Tanizaki A , Kurosawa K , Adachi A , Nishihara M , Sato R , Hasegawa R , Hatada Y
Ref : Genome Announc , 3 : , 2015
Abstract : This report describes the draft genome sequence of Novosphingobium sp. strain MBES04, isolated from sunken wood from Suruga Bay, Japan, which is capable of degrading a wide range of lignin-related aromatic monomers. The draft genome sequence contains 5,361,448 bp, with a G+C content of 65.4%.
ESTHER : Ohta_2015_Genome.Announc_3_e01373
PubMedSearch : Ohta_2015_Genome.Announc_3_e01373
PubMedID: 25593249
Gene_locus related to this paper: 9sphn-a0a0s6wud3 , 9sphn-a0a0s6wy59 , 9sphn-a0a0s6wym3 , 9sphn-a0a0s6wzq4 , 9sphn-a0a0s6x1d8 , 9sphn-a0a0s6x4h8

Title : Combination Therapy of Cholinesterase Inhibitor (Donepezil or Galantamine) plus Memantine in the Okayama Memantine Study - Matsuzono_2015_J.Alzheimers.Dis_45_771
Author(s) : Matsuzono K , Hishikawa N , Ohta Y , Yamashita T , Deguchi K , Nakano Y , Abe K
Ref : J Alzheimers Dis , 45 :771 , 2015
Abstract : BACKGROUND/OBJECTIVE: To compare the effectiveness of combination therapy with cholinesterase inhibitors (ChEI) plus memantine in all AD patients and in older AD patients (age >75 years).
METHODS: The Okayama Memantine Study was used to compare the clinical effects of combination therapy of donepezil plus memantine (n = 61) or galantamine plus memantine (n = 53) in all AD patients, and in older AD patients separately, with six batteries at baseline, at 6 months with ChEI only monotherapy, and at 3, 6, and 12 months after addition of memantine to the treatment schedule (18 months total).
RESULTS: The addition of memantine resulted in stabilization of the Mini-Mental State Examination scores and Hasegawa dementia rating for 6 months, and then significantly declined at 12 months in both subgroups. Frontal assessment battery (FAB) declined significantly at 12 months after memantine addition in the donepezil subgroup, while the galantamine subgroup significantly improved at 6 months. Affective functions were well preserved after memantine addition until 12 months, except for the apathy scale at 12 months after memantine addition in the galantamine subgroup. The combination therapy of donepezil plus memantine was better for apathy in older AD patients, and galantamine plus memantine was better for cognitive functions.
CONCLUSIONS: The addition of memantine stabilized cognitive scores for 6 months and affective scores for 12 months in the donepezil subgroup. Additionally, memantine significantly improved FAB at 6 months in the galantamine subgroup although apathy scale became significantly worse at 12 months.
ESTHER : Matsuzono_2015_J.Alzheimers.Dis_45_771
PubMedSearch : Matsuzono_2015_J.Alzheimers.Dis_45_771
PubMedID: 25624417

Title : Elephant shark genome provides unique insights into gnathostome evolution - Venkatesh_2014_Nature_505_174
Author(s) : Venkatesh B , Lee AP , Ravi V , Maurya AK , Lian MM , Swann JB , Ohta Y , Flajnik MF , Sutoh Y , Kasahara M , Hoon S , Gangu V , Roy SW , Irimia M , Korzh V , Kondrychyn I , Lim ZW , Tay BH , Tohari S , Kong KW , Ho S , Lorente-Galdos B , Quilez J , Marques-Bonet T , Raney BJ , Ingham PW , Tay A , Hillier LW , Minx P , Boehm T , Wilson RK , Brenner S , Warren WC
Ref : Nature , 505 :174 , 2014
Abstract : The emergence of jawed vertebrates (gnathostomes) from jawless vertebrates was accompanied by major morphological and physiological innovations, such as hinged jaws, paired fins and immunoglobulin-based adaptive immunity. Gnathostomes subsequently diverged into two groups, the cartilaginous fishes and the bony vertebrates. Here we report the whole-genome analysis of a cartilaginous fish, the elephant shark (Callorhinchus milii). We find that the C. milii genome is the slowest evolving of all known vertebrates, including the 'living fossil' coelacanth, and features extensive synteny conservation with tetrapod genomes, making it a good model for comparative analyses of gnathostome genomes. Our functional studies suggest that the lack of genes encoding secreted calcium-binding phosphoproteins in cartilaginous fishes explains the absence of bone in their endoskeleton. Furthermore, the adaptive immune system of cartilaginous fishes is unusual: it lacks the canonical CD4 co-receptor and most transcription factors, cytokines and cytokine receptors related to the CD4 lineage, despite the presence of polymorphic major histocompatibility complex class II molecules. It thus presents a new model for understanding the origin of adaptive immunity.
ESTHER : Venkatesh_2014_Nature_505_174
PubMedSearch : Venkatesh_2014_Nature_505_174
PubMedID: 24402279
Gene_locus related to this paper: calmi-ACHE , calmi-v9kt48 , calmi-v9kmb8 , calmi-v9kbr4 , calmi-v9kn25 , calmi-v9l873 , calmi-v9kkm2 , calmi-v9ku67 , calmi-v9ki62 , calmi-v9l0a5 , calmi-v9kuk3 , calmi-v9kdh1 , calmi-v9kas4 , calmi-v9keu1 , calmi-v9kj52 , calmi-v9kre8 , calmi-v9ki07 , calmi-v9kmn7 , calmi-a0a4w3h3v0 , calmi-a0a4w3hel5

Title : The genome of the Western clawed frog Xenopus tropicalis - Hellsten_2010_Science_328_633
Author(s) : Hellsten U , Harland RM , Gilchrist MJ , Hendrix D , Jurka J , Kapitonov V , Ovcharenko I , Putnam NH , Shu S , Taher L , Blitz IL , Blumberg B , Dichmann DS , Dubchak I , Amaya E , Detter JC , Fletcher R , Gerhard DS , Goodstein D , Graves T , Grigoriev IV , Grimwood J , Kawashima T , Lindquist E , Lucas SM , Mead PE , Mitros T , Ogino H , Ohta Y , Poliakov AV , Pollet N , Robert J , Salamov A , Sater AK , Schmutz J , Terry A , Vize PD , Warren WC , Wells D , Wills A , Wilson RK , Zimmerman LB , Zorn AM , Grainger R , Grammer T , Khokha MK , Richardson PM , Rokhsar DS
Ref : Science , 328 :633 , 2010
Abstract : The western clawed frog Xenopus tropicalis is an important model for vertebrate development that combines experimental advantages of the African clawed frog Xenopus laevis with more tractable genetics. Here we present a draft genome sequence assembly of X. tropicalis. This genome encodes more than 20,000 protein-coding genes, including orthologs of at least 1700 human disease genes. Over 1 million expressed sequence tags validated the annotation. More than one-third of the genome consists of transposable elements, with unusually prevalent DNA transposons. Like that of other tetrapods, the genome of X. tropicalis contains gene deserts enriched for conserved noncoding elements. The genome exhibits substantial shared synteny with human and chicken over major parts of large chromosomes, broken by lineage-specific chromosome fusions and fissions, mainly in the mammalian lineage.
ESTHER : Hellsten_2010_Science_328_633
PubMedSearch : Hellsten_2010_Science_328_633
PubMedID: 20431018
Gene_locus related to this paper: xenla-q6pcj9 , xentr-a9umk0 , xentr-abhdb , xentr-ACHE , xentr-b0bm77 , xentr-b1h0y7 , xentr-b2guc4 , xentr-b7zt03 , xentr-b7ztj4 , xentr-BCHE1 , xentr-BCHE2 , xentr-cxest2 , xentr-d2x2k4 , xentr-d2x2k6 , xentr-f6rff6 , xentr-f6v0g3 , xentr-f6v2j6 , xentr-f6v3z1 , xentr-f6y4c8 , xentr-f6yve5 , xentr-f7a4y9 , xentr-f7acc5 , xentr-f7e2e2 , xentr-LOC394897 , xentr-ndrg1 , xentr-q0vfb6 , xentr-f7cpl7 , xentr-f6yj44 , xentr-f7ejk4 , xentr-f6q8j8 , xentr-f6z8f0 , xentr-f7d709 , xentr-b0bmb8 , xentr-f7af63 , xentr-a0a1b8y2w9 , xentr-f7d4k9 , xentr-f6r032 , xentr-f6yvq3 , xentr-a0a1b8y2z3 , xentr-f7afg4 , xentr-f6xb15 , xentr-f7e1r2 , xentr-a4ihf1 , xentr-f7eue5 , xentr-f6u7u3 , xentr-f172a , xentr-f7equ8 , xentr-f7dd89 , xentr-a9jtx5

Title : Pseudomonas putida CE2010 can degrade biphenyl by a mosaic pathway encoded by the tod operon and cmtE, which are identical to those of P. putida F1 except for a single base difference in the operator-promoter region of the cmt operon - Ohta_2001_Microbiology_147_31
Author(s) : Ohta Y , Maeda M , Kudo T
Ref : Microbiology , 147 :31 , 2001
Abstract : Psudomonas putida CE2010 can assimilate biphenyl despite its high similarity to P. putida F1. Biphenyl degradation in strain CE2010 was achieved using a mosaic of pathways consisting of the cmt and tod operons. CmtE hydrolysed 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoic acid, the meta-cleavage product of 2,3-dihydroxybiphenyl. This enzyme was expressed differently in strains CE2010 and F1. A cmtE disruption mutant, a tod operon disruption mutant and a cmt operon disruption mutant were unable to utilize biphenyl. The introduction of the cmtE gene enabled the cmt operon disruption mutant to grow on biphenyl. A single base difference was found in the cmt promoter-operator region in strain CE2010, compared with that of strain F1. CymR protein was purified from Escherichia coli and binding assays were performed, the results of which suggested that the protein bound less strongly to the CE2010 operator sequence than to the F1 operator sequence. Exchanging the F1 promoter-operator fragment into strain CE2010 resulted in a loss of biphenyl degradation capacity. These results indicate that cmtE is not effectively repressed by CymR in strain CE2010, leading to low constitutive expression and, therefore, low growth on biphenyl.
ESTHER : Ohta_2001_Microbiology_147_31
PubMedSearch : Ohta_2001_Microbiology_147_31
PubMedID: 11160798
Gene_locus related to this paper: psepu-todf

Title : Alcoholic hypertriglyceridemia with decreased activity of lipoprotein lipase and hepatic triglyceride lipase - Hiasa_1993_Intern.Med_32_490
Author(s) : Hiasa Y , Nakanishi K , Tada K , Mizukami Y , Akamatsu K , Ohta Y
Ref : Intern Med , 32 :490 , 1993
Abstract : A 35-year-old male with alcoholic hypertriglyceridemia due to decreased lipoprotein lipase (LPL) and hepatic triglyceride lipase (HTGL) activities is reported. The patient had been drinking about 180 ml of whiskey (equivalent to 80 g of 100% ethanol) every day for the last 17 years, and the highest levels of serum triglyceride (TG) and cholesterol were 5,120 mg/dl and 506 mg/dl, respectively. Serum TG level returned to normal levels after complete alcohol abstinence. Further intake of ethanol resulted in an increase in serum TG to 326 mg/dl with a concomitant decrease in the serum levels of LPL and HTGL activities.
ESTHER : Hiasa_1993_Intern.Med_32_490
PubMedSearch : Hiasa_1993_Intern.Med_32_490
PubMedID: 8241594

Title : Molecular defect in familial lecithin:cholesterol acyltransferase (LCAT) deficiency: a single nucleotide insertion in LCAT gene causes a complete deficient type of the disease - Bujo_1991_Biochem.Biophys.Res.Commun_181_933
Author(s) : Bujo H , Kusunoki J , Ogasawara M , Yamamoto T , Ohta Y , Shimada T , Saito Y , Yoshida S
Ref : Biochemical & Biophysical Research Communications , 181 :933 , 1991
Abstract : Familial lecithin:cholesterol acyltransferase (LCAT) deficiency is a hereditary disorder with clinical manifestations including corneal opacity, premature atherosclerosis and renal failure. In this study, we analyzed the molecular base underlying a case of Japanese LCAT deficiency, in which both LCAT mass and activity of the proband were nearly absent. DNA blot hybridization analysis showed no gross rearrangement in the LCAT gene of the proband. The nucleotide sequence analysis of the cloned LCAT gene demonstrated only an extra nucleotide "C" insertion at the first exon, when compared to the sequence of wild type. This single base insertion caused a shift of the following reading frame, probably resulting in a truncated abnormal LCAT polypeptide that consist of only 16 amino acids. The direct sequence analysis of PCR-amplified DNA showed only the same insertion, indicating that the LCAT-deficient proband is a homozygote for the mutant allele. These results indicate that the clinical and biochemical feature of the patient is mainly caused by a complete deficiency of the enzyme based on a homozygous abnormality of LCAT gene.
ESTHER : Bujo_1991_Biochem.Biophys.Res.Commun_181_933
PubMedSearch : Bujo_1991_Biochem.Biophys.Res.Commun_181_933
PubMedID: 1662503

Title : The pre- and postjunctional components of the neuromuscular effect of antibiotics - Vizi_1991_J.Anesth_5_1
Author(s) : Vizi ES , Chaudhry IA , Goldiner PL , Ohta Y , Nagashima H , Foldes FF
Ref : J Anesth , 5 :1 , 1991
Abstract : The relative contributions of the pre- and postsynaptic components of the myoneural blocking effect of different antibiotics were studied using: (a) a radio-active method that measures selectively the Ca(2+)-dependent, stimulation evoked, quantally released, (3)H-acetylcholine ((3)H-ACh) from the mouse in vitro phrenic nerve-hemidiaphragm preparation without cholinesterase inhibition; (b) measurement of the force of contraction of the indirectly or directly stimulated muscle. The antibiotics studied (neomycin, polymyxin B and lincomycin), reduced the release of (3)H-ACh evoked by stimulation (18 trains of 40 shocks at 50 Hz) in a concentration dependent manner. While the inhibitory effect of neomycin was inversely related to [Ca(2+)](o), that of lincomycin was moderately and that of polymyxin B was not affected by increasing [Ca(2+)](o) from 0.75 to 5.0 mM. Similarly, the d-tubocurarine (d-Tc)-induced inhibition of the release of (3)H-ACh was independent of [Ca(2+)](o). The K-channel blocking agent, 4-aminopyridine (4-AP), enhanced the release of ACh in a concentration dependent manner and prevented the neuromuscular effect of neomycin. However, the neuromuscular effect of polymyxin B and of lincomycin was not affected by 4-AP. Atropine, enhanced the release of (3)H-ACh. Antibiotics, however, were still able to reduce the release of ACh when the negative muscarinic feedback mechanism of ACh release was eliminated by atropine. Our findings indicate that the antibiotics studied possess both pre- and postsynaptic effects. Presynaptically they reduce the evoked release of ACh; postsynaptically they inhibit muscle contractility. The rank order of presynaptic action is neomycin >polymyxin B >lincomycin.
ESTHER : Vizi_1991_J.Anesth_5_1
PubMedSearch : Vizi_1991_J.Anesth_5_1
PubMedID: 15278661

Title : The mechanism of the anti-desensitizing action of sodium fluoride at the amphibian neuromyal junction -
Author(s) : Ohta Y , Akasu T , Karczmar AG
Ref : Neuropharmacology , 21 :861 , 1982
PubMedID: 6815547

Title : Neuromyopharmacology as related to anticholinesterase action -
Author(s) : Karczmar AG , Ohta Y
Ref : Fundamental & Applied Toxicology , 1 :135 , 1981
PubMedID: 6307795