Search Results - "Nagano, Masashi"

Acquisition of developmental competence and in vitro growth culture of bovine oocytes by NAGANO, Masashi

“…Recently, the demand of transferable embryos in cattle industry is increasing, and the number of embryos produced in vitro is also increasing in the world…”
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Effects of heat stress on the endometrial epidermal growth factor profile and fertility in dairy cows by KAWANO, Kohei, YANAGAWA, Yojiro, NAGANO, Masashi, KATAGIRI, Seiji

“…The endometrial epidermal growth factor (EGF) profile is an indicator of uterine function and fertility in cattle. The present study aimed to investigate the…”
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Macrophage ubiquitin-specific protease 2 contributes to motility, hyperactivation, capacitation, and in vitro fertilization activity of mouse sperm by Hashimoto, Mayuko, Kimura, Shunsuke, Kanno, Chihiro, Yanagawa, Yojiro, Watanabe, Takafumi, Okabe, Jun, Takahashi, Eiki, Nagano, Masashi, Kitamura, Hiroshi

“…Macrophages are innate immune cells that contribute to classical immune functions and tissue homeostasis. Ubiquitin-specific protease 2 (USP2) controls…”
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Relationship between the timing of insemination based on estrus detected by the automatic activity monitoring system and conception rates using sex-sorted semen in Holstein dairy cattle by FURUKAWA, Eri, KANNO, Chihiro, YANAGAWA, Yojiro, KATAGIRI, Seiji, NAGANO, Masashi

“…We investigated the optimal timing of artificial insemination (AI) for achieving pregnancy according to the onset/end of estrus detected by an accelerometer…”
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Pre-maturational culture promotes the developmental competence of bovine oocytes derived from an 8-day in vitro growth culture system by CHELENGA, Madalitso, YANAGAWA, Yojiro, KATAGIRI, Seiji, NAGANO, Masashi

“…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…”
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Effect of seminal plasma infusion into the vagina on the normalization of endometrial epidermal growth factor concentrations and fertility in repeat breeder dairy cows by BADRAKH, Dagvajamts, YANAGAWA, Yojiro, NAGANO, Masashi, KATAGIRI, Seiji

“…Epidermal growth factor (EGF) concentrations in the uterus show two peaks on days 2–4 and 13–14 during the estrous cycle in fertile cows. Loss of the two peaks…”
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The attempts to improve the conception rate of transvaginal artificial insemination using frozen-thawed semen by using a Foley catheter to retain semen adjacent to the cervical os in ewes by Saito, Nozomi, Sagawa, Satoko, Momozawa, Kenji, Nagano, Masashi

“…A new transvaginal artificial insemination (AI) procedure by frozen-thawed semen using a Foley catheter in ewes was performed in the present study. A 30-ml…”
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Low oxygen environment and astaxanthin supplementation promote the developmental competence of bovine oocytes derived from early antral follicles during 8 days of in vitro growth in a gas-permeable culture device by Chelenga, Madalitso, Sakaguchi, Kenichiro, Kawano, Kohei, Furukawa, Eri, Yanagawa, Yojiro, Katagiri, Seiji, Nagano, Masashi

“…We evaluated the effects of a constant low (5-5%) and modulated (5–20%) oxygen environments on the in vitro development of bovine oocyte-cumulus-granulosa cell…”
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Leptin receptor expression and its change in association with the normalization of EGF profile after seminal plasma treatment in repeat breeder dairy cows by NINPETCH, Nattapong, BADRAKH, Dagvajamts, KYAW, HAY MAR, KAWANO, Kohei, YANAGAWA, Yojiro, NAGANO, Masashi, KATAGIRI, Seiji

“…Factors associated with high milk production levels have been linked to alterations in the endometrial epidermal growth factor (EGF) profile, a cause of…”
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Effects of the presence of a large follicle and a corpus luteum in bovine ovaries on nuclear maturation of oocytes and steroidogenesis of granulosa cells cultured as oocyte-cumulus-granulosa complexes derived from early antral follicles by Kenichiro Sakaguchi, Kohei Kawano, Yojiro Yanagawa, Seiji Katagiri, Masashi Nagano

“…[Abstract] The presence of a dominant follicle (DF) and a corpus luteum (CL) in bovine ovaries is known to promote blood flow to each other and to antral…”
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Theca cells can support bovine oocyte growth in vitro without the addition of steroid hormones by Yang, Yinghua, Kanno, Chihiro, Sakaguchi, Kenichiro, Katagiri, Seiji, Yanagawa, Yojiro, Nagano, Masashi

“…Theca cells (TCs) are essential to folliculogenesis by contributing to steroidogenesis. However, the in vitro growth (IVG) of oocytes co-cultured with TCs has…”
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Deciphering two rounds of cell lineage segregations during bovine preimplantation development by Akizawa, Hiroki, Saito, Shun, Kohri, Nanami, Furukawa, Eri, Hayashi, Yoshihiro, Bai, Hanako, Nagano, Masashi, Yanagawa, Yojiro, Tsukahara, Hayato, Takahashi, Masashi, Kagawa, Shinjiro, Kawahara‐Miki, Ryouka, Kobayashi, Hisato, Kono, Tomohiro, Kawahara, Manabu

“…Blastocyst formation gives rise to the inner cell mass (ICM) and trophectoderm (TE) and is followed by the differentiation of the epiblast (Epi) and primitive…”
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Comparative study on the relationship between cytobrush cytology and histopathological examinations on endometrium of slaughtered cows without clinical symptom by Naoki Yamamoto, Ryo Nishimura, Yasuhisa Yamashita, Takehito Morita, Jun Kawase, Masashi Nagano

“…[Abstract] Cytobrush cytology of the endometrium has been developed as a practical procedure to diagnose subclinical endometritis in cows and polymorphonuclear…”
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Effect of increased oxygen availability and astaxanthin supplementation on the growth, maturation and developmental competence of bovine oocytes derived from early antral follicles by Chelenga, Madalitso, Sakaguchi, Kenichiro, Abdel-Ghani, Mohammed A., Yanagawa, Yojiro, Katagiri, Seiji, Nagano, Masashi

“…In vitro growth (IVG) culture of bovine oocyte-cumulus-granulosa complexes (OCGCs) is generally carried out for 12 or 14 days using conventional gas…”
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Effect of a single epidural administration of follicle-stimulating hormone via caudal vertebrae on superstimulation for in vivo and in vitro embryo production in Japanese black cows by SAKAGUCHI, Kenichiro, IDETA, Atsushi, YANAGAWA, Yojiro, NAGANO, Masashi, KATAGIRI, Seiji, KONISHI, Masato

“…Here, we describe a simplified procedure for embryo production in the Japanese black cow that uses a single caudal epidural injection of follicle-stimulating…”
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Monitoring follicular dynamics to determine estrus type and timing of ovulation induction in captive brown bears (Ursus arctos) by TORII, Yoshiko, MATSUMOTO, Naoya, SAKAMOTO, Hideyuki, NAGANO, Masashi, KATAGIRI, Seiji, YANAGAWA, Yojiro

“…It is important to understand ovarian physiology when developing an artificial insemination (AI) protocol. Brown bears (Ursus arctos) have a breeding season…”
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Relationships between the antral follicle count, steroidogenesis, and secretion of follicle-stimulating hormone and anti-Müllerian hormone during follicular growth in cattle by Sakaguchi, Kenichiro, Yanagawa, Yojiro, Yoshioka, Koji, Suda, Tomoko, Katagiri, Seiji, Nagano, Masashi

“…The antral follicle count (AFC) in mammalian ovaries positively correlates with female fertility. To clarify the causes of differences in fertility between low…”
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Fertilizability of oocytes derived from Holstein cows having different antral follicle counts in ovaries by Nagai, Katsuhisa, Yanagawa, Yojiro, Katagiri, Seiji, Nagano, Masashi

“…In this study, to clarify the relationship between ovarian reserve and oocyte quality, cumulus-oocyte complexes (COCs) were collected repeatedly by ovum…”
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Monitoring follicular dynamics using ultrasonography in captive brown bears (Ursus arctos) during the breeding season by Torii, Yoshiko, Matsumoto, Naoya, Sakamoto, Hideyuki, Nagano, Masashi, Katagiri, Seiji, Yanagawa, Yojiro

“…Artificial insemination (AI) may be a useful tool in the reproductive management of endangered animals, including bears. To establish an AI program for bears,…”
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Elobixibat alleviates chronic constipation in hemodialysis patients: a questionnaire-based study by Kamei, Daigo, Kamei, Yuiko, Nagano, Masashi, Mineshima, Michio, Nitta, Kosaku, Tsuchiya, Ken

“…Hemodialysis patients are prone to constipation, which can adversely affect their quality of life (QOL). Elobixibat, a highly selective inhibitor of the ileal…”
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