Youichi Sato

ORCID: 0000-0003-2224-552X
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About
Contact & Profiles
Research Areas
  • Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
  • Sperm and Testicular Function
  • Sexual Differentiation and Disorders
  • Diabetes Treatment and Management
  • Peptidase Inhibition and Analysis
  • Neuropeptides and Animal Physiology
  • Forensic and Genetic Research
  • Genomics and Chromatin Dynamics
  • Genetic Associations and Epidemiology
  • Ubiquitin and proteasome pathways
  • Muscle metabolism and nutrition
  • Genetic diversity and population structure
  • Metabolism, Diabetes, and Cancer
  • Hormonal and reproductive studies
  • Chemical Synthesis and Analysis
  • Pharmacological Effects of Natural Compounds
  • Genetic and phenotypic traits in livestock
  • Adipose Tissue and Metabolism
  • Click Chemistry and Applications
  • Reproductive Biology and Fertility
  • Biochemical Acid Research Studies
  • Hypothalamic control of reproductive hormones
  • Aldose Reductase and Taurine
  • Pancreatitis Pathology and Treatment
  • Biotin and Related Studies

Tokushima University
2014-2024

Institute of Biomedical Science
2016-2021

Japan Aerospace Exploration Agency
2012

Saitama Medical University Hospital
2011

Sakurabashi Watanabe Hospital
2010

Health and Human Development (2HD) Research Network
2008-2010

Iwate Biotechnology Research Center
2009

In-Q-Tel
2009

Japan Science and Technology Agency
2007

Public Health Institute
2006

The aim of this study was to determine whether cinnamon extract (CE) would improve the glucose utilization in normal male Wistar rats fed a high-fructose diet (HFD) for three weeks with or without CE added drinking water (300 mg/kg/day). In vivo measured by euglycemic clamp technique. Further analyses on possible changes insulin signaling occurring skeletal muscle were performed afterwards Western blotting. At 3 mU/kg/min infusions, decreased infusion rate (GIR) HFD-fed (60 % controls, p <...

10.1055/s-2004-814223 article EN Hormone and Metabolic Research 2004-02-01

Examination of the EtOH extract fruiting bodies Terminalia chebula RETZ. led to isolation two potent antimicrobial substances against even methicillin-resistant strains Staphylococcus aureus. On basis spectroscopic evidence, isolates have been identified as gallic acid and its ethyl ester.

10.1248/bpb.20.401 article EN Biological and Pharmaceutical Bulletin 1997-01-01

We examined the role of dipeptidyl peptidase IV (DPP4) in development diabetes, dyslipidaemia and renal dysfunction induced by streptozotocin (STZ). F344/DuCrlCrlj rats, which lack DPP4 activity, wild-type rats were treated with STZ. Plasma activity biochemical parameters measured until 42 days after STZ treatment. At end experiment, function expressions kidney, liver, pancreas adipose tissues determined. Increases blood glucose, cholesterol triglycerides evoked both rat strains; however,...

10.1677/joe-08-0424 article EN Journal of Endocrinology 2008-10-17

We previously found that plasma dipeptidyl peptidase 4 (DPP4) activity was associated with the development of obesity, type 2 diabetes, and 1 diabetes using animal models. In this study, we investigated whether DPP4 is correlated clinical parameters obesity and/or in healthy young subjects. Body mass index (BMI), activity, total cholesterol, high density lipoprotein (HDL) triglycerides, fasting blood glucose, adiponectin concentration, body fat were measured 165 subjects (110 males 55...

10.1507/endocrj.ej12-0158 article EN Endocrine Journal 2012-01-01

10.1007/s13530-025-00253-z article EN Toxicology and Environmental Health Sciences 2025-02-04

Are the four candidate loci (rs7867029, rs7174015, rs12870438 and rs724078) for human male fertility traits, identified in a genome-wide association study (GWAS) of Hutterite population USA, associated with infertility Japanese population? rs7867029, rs7174015 are significantly risk population. Recently, GWAS USA revealed that 41 single-nucleotide polymorphisms (SNPs) were correlated family size or birth rate. Of these, SNPs found to be semen parameters ethnically diverse men from Chicago....

10.1093/humrep/dev088 article EN Human Reproduction 2015-04-23

Abstract This study was conducted to find constituents of an annual herb, Xanthium sibiricum Patr er Widd, with effective antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA). By monitoring MRSA strains, it shown that a sesquiterpene lactone, identified as [3aR-(3aα,7β,8aβ)]-3,3a,4,7,8,8a-hexahydro-7-methyl-3-methylene-6-(3-oxo-1-butenyl)-2H-cyclohepta[b]furan-2-one, or xanthatin, isolated from leaves the had outstandingly potent S. species, including MRSA; its...

10.1111/j.2042-7158.1997.tb06038.x article EN Journal of Pharmacy and Pharmacology 1997-10-01

Altered dipeptidyl peptidase-4 (DPP4) activity during the progression of late-stage type 2 diabetes was measured in Otsuka Long-Evans Tokushima fatty (OLETF) rats. Compared with OLETF rats subjected to 30% food restriction, food-satiated exhibited spontaneous hyperphagic obesity, insulin resistance, hyperglycemia, hyperinsulinemia, and increased plasma DPP4 early phase experiment (up ∼30 wk). Subsequently, their as well body weight, fat, concentration declined control levels late phase,...

10.1152/ajpendo.00319.2010 article EN AJP Endocrinology and Metabolism 2010-12-08

Several studies have investigated whether particular Y chromosome haplogroups are associated with spermatogenic failure in Japanese males; however, they produced differing results. In this study, to investigate the association of haplogroup failure, we recruited 451 infertile patients and 730 fertile men from a population typed their haplogroups. The were suffering varicocele, azoospermia, oligozoospermia, asthenozoospermia, obstructive karyotype abnormalities, microdeletions long arm...

10.1095/biolreprod.112.105718 article EN Biology of Reproduction 2013-03-07

The ligand-dependent incorporation of a reporter molecule (e.g., fluorescence dye or biotin) onto endogenous target protein has emerged as an important strategy for elucidating function using various affinity-based labelling reagents consisting reporter, ligand and reactive units. Conventional generally use weakly activated unit, which can result in the non-specific proteins ligand-independent manner. In this context, activation reagent through targeted protein-ligand interaction could...

10.1039/c6ob01014h article EN Organic & Biomolecular Chemistry 2016-01-01

Several studies have investigated whether dipeptidyl peptidase IV (DPP IV) activity is correlated to the severity of diabetes; however, it remains unclear. To investigate roles DPP in metabolic abnormalities, impaired glucose tolerance rats were produced using a high-fat (HF) or high-sucrose (HS) diet. HF diet-fed obviously exhibited tolerance, with increases subcutaneous and epididymal fat mass, insulin resistance dyslipidaemia. In fed HS diet rather than normal diet, lower body weight...

10.1248/bpb.32.463 article EN Biological and Pharmaceutical Bulletin 2009-01-01

Obesity as well its associated chronic diseases and adverse health consequences such type 2 diabetes mellitus, dyslipidemia, hypertension, coronary artery disease are afflicting middle-aged adults an ever greater number of children globally. We planned to investigate new obesity-related factors using proteomics approaches in a randomly selected three high low BMI samples Epstein-Barr-transformed B (EBV-B) lymphoblastoid cell lines prepared from two groups young Japanese men with different...

10.1038/oby.2008.612 article EN Obesity 2009-01-19

Japanese people are widely believed to be the descendants of Jomon and Yayoi people. The dual-structure model, which attempts explain formation population, hypothesizes that indigenous migrated from northern island Hokkaido Ryukyu Islands other islands Japan, where they resided before started arrive in Kyushu (the westernmost main archipelago) Korean peninsula. Regarding Y chromosome DNA polymorphisms, it is assumed males frequently belong haplogroups C or D, while haplogroup O. These...

10.1537/ase.140709 article EN Anthropological Science 2014-01-01

Heat shock transcription factor on Y (HSFY) is located in one of three candidate regions for azoospermic (AZF), AZFb the chromosome. We and others have already revealed that some males are missing chromosome including HSFY. Previously, we showed murine HSFY-like sequence [mHSFYL (Riken cDNA 4933413G11Rik)], which mouse orthologue HSFY, exclusively expressed testis. The sequences encoding presumed DNA-binding domain HSFY mHSFYL were found other mammals such as dogs, cows chickens. To...

10.2152/jmi.53.117 article EN The Journal of Medical Investigation 2006-01-01

The association between the Y chromosome haplogroup D2 and risk of azoospermia low sperm motility has been previously studied, it was indicated that haplogroups DE (YAP lineage) are associated with prostate cancer in Japanese males. Our assumption had may be sex hormone levels, because hormones have deemed responsible for spermatogenesis carcinogenesis. In this study, we assessed including those testosterone, hormone-binding globulin (SHBG), follicle-stimulating (FSH), luteinizing (LH),...

10.1111/andr.12026 article EN Andrology 2015-04-08

The DAZL (DAZ-like) gene is suggested to be an ancestral of the DAZ (deleted in azoospermia) on Y chromosome, which a strong candidate for azoospermic factor. Recently, it has been reported that T54A (Thr54→Ala) polymorphism exon 3 associated with spermatogenic failure Taiwanese population. In this study, investigate whether Japanese males, we analysed genomic DNA derived from 234 patients azoospermia or oligozoospermia and 131 fertile controls. was completely absent both T12A (Thr12→Ala) 2...

10.1093/molehr/gah202 article EN Molecular Human Reproduction 2005-07-01
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