Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Yojiro Yanagawa"'
Publikováno v:
The Journal of Reproduction and Development, Vol 70, Iss 3, Pp 184-191 (2024)
Heat stress reduces the developmental competence of bovine oocytes during the growth phase; however, the detailed mechanisms remain unclear. Amino acids play various critical roles in follicular development, including protein synthesis and as energy
Externí odkaz:
https://doaj.org/article/c96055b28d7649aca7599b75c8091977
Publikováno v:
The Journal of Reproduction and Development, Vol 69, Iss 4, Pp 214-217 (2023)
In this study, we evaluated the effects of pre-maturational culture (pre-IVM) on the developmental competence of bovine oocytes derived from an 8-day in vitro growth (IVG) culture system. IVG oocytes were subjected to 5 h pre-IVM before in vitro matu
Externí odkaz:
https://doaj.org/article/94a896d2d8424806bbf6c0ae2197f8c7
Autor:
Eri FURUKAWA, Yojiro YANAGAWA, Akira MATSUZAKI, Heejin KIM, Hanako BAI, Masashi TAKAHASHI, Seiji KATAGIRI, Shogo HIGAKI
Publikováno v:
The Journal of Reproduction and Development, Vol 69, Iss 2, Pp 103-108 (2023)
The present study investigated the applicability of a calving prediction model based on supervised machine learning of ruminal temperature (RT) data in dairy cows. The existence of cow subgroups for prepartum RT changes was also examined, and the pre
Externí odkaz:
https://doaj.org/article/0221c974ac4145498cdc5ea23b208252
Autor:
Shun SAITO, Hiroki AKIZAWA, Eri FURUKAWA, Yojiro YANAGAWA, Hanako BAI, Masashi TAKAHASHI, Manabu KAWAHARA
Publikováno v:
The Journal of Reproduction and Development, Vol 68, Iss 5, Pp 330-334 (2022)
Conventional culture systems for bovine embryos are unable to support sustained embryonic development until the developmentally mature blastocyst stage. Although we have previously developed an on-gel culture system that enables bovine blastocysts to
Externí odkaz:
https://doaj.org/article/0e9bc0cb210d483c817c7bf7e6530922
Publikováno v:
The Journal of Reproduction and Development, Vol 68, Iss 4, Pp 295-298 (2022)
We investigated the optimal timing of artificial insemination (AI) for achieving pregnancy according to the onset/end of estrus detected by an accelerometer system in Holstein cattle. The conception rates of conventional semen were used as a referenc
Externí odkaz:
https://doaj.org/article/54eb3bc153df4c128b0d7dce7adeaf0a
Autor:
Kohei Kawano, Kenichiro Sakaguchi, Chelenga Madalitso, Nattapong Ninpetch, Shintaro Kobayashi, Eri Furukawa, Yojiro Yanagawa, Seiji Katagiri
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-14 (2022)
Abstract In dairy cows, low fertility caused by summer heat stress continues into the cooler autumn season. This can be caused by impaired oocyte quality in small growing follicles during summer. Here, we subjected oocyte–cumulus–granulosa comple
Externí odkaz:
https://doaj.org/article/d37fa024c8254915b7f0a8b832263c93
Autor:
Nattapong NINPETCH, Dagvajamts BADRAKH, HAY MAR KYAW, Kohei KAWANO, Yojiro YANAGAWA, Masashi NAGANO, Seiji KATAGIRI
Publikováno v:
The Journal of Reproduction and Development, Vol 68, Iss 3, Pp 209-215 (2022)
Factors associated with high milk production levels have been linked to alterations in the endometrial epidermal growth factor (EGF) profile, a cause of reduced fertility in dairy cows. Therefore, we examined the leptin system that connects nutrition
Externí odkaz:
https://doaj.org/article/e4860b9db74a4a7aa338f9dab7939828
Publikováno v:
The Journal of Reproduction and Development, Vol 68, Iss 2, Pp 144-151 (2022)
The endometrial epidermal growth factor (EGF) profile is an indicator of uterine function and fertility in cattle. The present study aimed to investigate the effects of heat stress on the endometrial EGF profile and fertility in lactating Holstein co
Externí odkaz:
https://doaj.org/article/d4761fd817ed44068cfa57e193b028df
Autor:
Otgontuya Ganbaatar, Satoru Konnai, Tomohiro Okagawa, Yutaro Nojima, Naoya Maekawa, Yoshiki Ichikawa, Atsushi Kobayashi, Tomoyuki Shibahara, Yojiro Yanagawa, Hidetoshi Higuchi, Yukinari Kato, Yasuhiko Suzuki, Shiro Murata, Kazuhiko Ohashi
Publikováno v:
Immunity, Inflammation and Disease, Vol 9, Iss 4, Pp 1573-1583 (2021)
Abstract Introduction Chronic infections lead to the functional exhaustion of T cells. Exhausted T cells are phenotypically differentiated by the surface expression of the immunoinhibitory receptor, such as programmed death‐1 (PD‐1). The inhibito
Externí odkaz:
https://doaj.org/article/c1781704b73940e2bfc77036577955b1
Autor:
Kenichiro Sakaguchi, Kohei Kawano, Yuki Otani, Yojiro Yanagawa, Seiji Katagiri, Evelyn E. Telfer
Publikováno v:
Animals, Vol 13, Iss 7, p 1141 (2023)
The amino acid metabolism of bovine follicles during in vitro growth (IVG) was evaluated to identify potential indicators of health during culture. The bovine ovarian cortex was sliced, prepared as strips, and cultured for 6 days. Tissue samples were
Externí odkaz:
https://doaj.org/article/9ff77af433c44efc94d55b37194c96ad