A5077311819- Reproductive biology and impacts on aquatic species
- Aquaculture Nutrition and Growth
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Sperm and Testicular Function
- Advanced ceramic materials synthesis
- Advanced materials and composites
- Fish Biology and Ecology Studies
- Rheumatoid Arthritis Research and Therapies
- Bone health and osteoporosis research
- High-Temperature Coating Behaviors
- Environmental Toxicology and Ecotoxicology
- Fish Ecology and Management Studies
- Microbial Natural Products and Biosynthesis
- Physiological and biochemical adaptations
- Reproductive Biology and Fertility
- Primate Behavior and Ecology
- Animal Behavior and Reproduction
- ZnO doping and properties
- Circadian rhythm and melatonin
- Hormonal and reproductive studies
- Wildlife Ecology and Conservation
- Carbohydrate Chemistry and Synthesis
- Crustacean biology and ecology
- Semiconductor materials and devices
- Avian ecology and behavior
Kanazawa University
2019-2025
Kitasato Institute Hospital
1980-2021
Kitasato University
1984-2021
IHI Corporation (Japan)
2020
Deen Dayal Upadhyaya Gorakhpur University
2019
Tokyo University of Agriculture
2009-2018
Magyar Agrár- és Élettudományi Egyetem
2018
Keio University
2017
Kitano Hospital
2016
Handa City Hospital
2014
In some animals, such as fish, insects, and cephalopods, the thick egg coat has a narrow canal—a micropyle—through which spermatozoa enter eggs. there is no indication that are attracted by eggs from distance, but once come near outer opening of micropyle, they exhibit directed movement toward it, suggesting substance exists in this defined region to attract spermatozoa. Since Coomassie Blue (CB) binds preferentially micropyle flounder, herring, steelhead, other it probably stains sperm...
Eggs of teleost fish, unlike those many other animals, allow sperm entry only at a single site, narrow canal in the egg's chorion called micropyle. In some fish (e.g., flounder, herring, and Alaska pollock), micropyle is channel chorion, with or without shallow depression around outer opening salmon, pufferfish, cod, medaka), like funnel conical opening. all above have glycoprotein tightly bound to surface This directs spermatozoa into micropylar Ca2+-dependent manner. substance, attractant...
Steroid hormone receptor family provides an example of evolution diverse transcription factors through whole-genome duplication (WGD). However, little is known about how their functions have been evolved after the duplication. Teleosts present a good model to investigate accurate evolutionary history protein function WGD, because teleost-specific WGD (TSGD) resulted in variety duplicated genes modern fishes. This study focused on androgen (AR) gene, as two distinct paralogs, ARα and ARβ,...
Abstract The occurrence of morphological deformities under different rearing water temperatures (18, 20, 22, 24, 26, 28, and 30 C) was examined in Japanese eel larvae. rates hatching survival until yolk resorption at 22–26 C were higher than those other temperatures. Fertilized eggs never hatched 18 C. abnormal larvae reared the 24–28 lower 20 or 22 Pericardial edema jaw occurred most frequently (20 C). In contrast, incubation temperature did not significantly affect relative frequency some...
Room temperature continuous wave operation of ZnSe-based blue/green laser diodes grown homoepitaxially on conductive ZnSe substrates with threshold current densities as low 176 A/cm2 has been demonstrated. This is the lowest reported among all short wavelength lasers in region. Lifetimes at room up to 2.1 h have obtained for pre-existing defect lower than 3×104 cm−2.
To understand the dynamics of lipid uptake into ovary and potential role that lipoprotein lipase plays in this event, changes LPL transcript abundance during oogenesis were measured both wild-caught pituitary homogenate-induced artificially maturing eels. Also, effects 11-ketotestosterone (11-KT) on mRNA levels investigated vivo vitro. Normalized ovarian increased as advanced, it rose particularly rapidly midvitellogenesis, corresponding to pronounced increases deposits activity....
We comprehensively analyzed X-ray cocrystal structures of dipeptidyl peptidase IV (DPP-4) and its inhibitor to clarify whether DPP-4 alters general or partial structure according the used has a common rule for binding.All main side chains in binding area were minimally altered, except few chains, despite inhibitors various shapes. Some residues (Arg125, Glu205, Glu206, Tyr662 Asn710) had modes fix specific atom particular spatial position DPP-4. found two water molecules that 92 structures....
To study the toxicity of 3-hydroxybenzo[c]phenanthrene (3-OHBcP), a metabolite benzo[c]phenanthrene (BcP), first we compared it with its parent compound, BcP, using an in ovo-nanoinjection method Japanese medaka. Second, examined influence 3-OHBcP on bone metabolism goldfish. Third, detailed mechanism was investigated zebrafish and The LC50s BcP medaka were 5.7 nM 0.003 nM, respectively, indicating that more than 1900 times as toxic compound. In addition, nanoinjected (0.001 nM) induced...
To elucidate the molecular mechanisms underling hydration during oocyte maturation, we characterized structure of Japanese eel (Anguilla japonica) novel-water selective aquaporin 1 (AQP1b) that thought to be involved in hydration. The aqp1b cDNA encodes a 263 amino acid protein includes six potential transmembrane domains and two Asn-Pro-Ala motifs. Reverse transcription-polymerase chain reaction showed transcription ovary testis but not other tissues. In situ hybridization studies with cRNA...