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The ability of in vitro cultured bovine oviduct epityelial cells in binding and maintaining motility of bull sperm
1999
Roh, S.H. (Hankyong National University, Ansung (Korea Republic). Department of Animal Life Resources) | Lee, B.C. | Hwang, W.S. (Seoul National University, Suwon (Korea Republic). College of Veterinary Medicine)
The aim of these experiments was to investigate the effects of bovine oviduct epithelial cells(OEC) derived from different segments to bind sperm binding and maintain their motility in vitro. In experiment 1, the number of sperm attached to OEC derived from isthmus or ampulla, the motility of unattached sperm during co-culture and fertilizing ability were assessed. In experiment 2, heparin treated sperm 9hsp) or no treated sperm (nsp) were used to evaluate OEC binding ability ofcapacitated sperm. In experiment 1, regardless ofthier origin, approximately 65% of the sperm were attached to OEC within 2h. From 6h of co-culture, the numbers of unattached sperm on ampullary OEC were significantly higher than those on isthmic OEC (p0.005). From 12h of co-culture, the motility of unattached sperm on isthmic OEC were significantly higher than those on ampullary OEC(p0.05). The cleavage rate of oocytes inseminated on OEC derived from isthmic segment was also significantly higher than those from ampullary segment (p0.01). In experiment 2, the numbers of unattached hsp on OEC were significantly higher than those of controls(p0.01), between 2~24h examination. From 12h of co-culture, the motility of unattached nsp were sighificantly greater than those of hsp(p0.01). These results show that bovine OEC derived from the isthmus play more important role(s) for sperm binding, maintaining motility and fertilization in vitro than those from the ampulla, and heparin induced capacitation may change sperm binding ability on OEC in vitro.
Mostrar más [+] Menos [-]Histological and immunohistochemical effects of Jengjengamiyjintang on the duodenal ulcer induced by HCI-aspirin
1999
Ku, S.K. (Dong-Wha Pharmaceutical Industry Company, Anyang (Korea Republic). Parmacol & Toxicol Laboratory, Central Research Laboratories) | Lee, H.S. (Kyungsan University, Kyungsan (Korea Republic). Department of Biology, Faculty of Basic Science) | lee, J.H. (Kyungpook National University, Taegu (Korea Republic). Laboratory of Histology, College of Veterinary Medicine)
In order to study the effects of Jengjengamiyjintang on the duodenal ulcer induced by HCI-aspirin in rats, the changes of histological profiles, goblet cells(PAS-positive cells), and the distribution and frequency of cholecystokinin(CCK)-8 and serotonin-producing gastro-entero-endocrine cells were observed after oral administration of Jengjengamiyjintang. Histologically, very severe injury to duodenal epithelium were observed in control groups and theses injuries were increased with time intervals. But in the Jengjengamiyjintang administrated groups, no gross lesion of ulcer were demonstrated and histologically minor injury to the mucosal epithelium were observed. PAS-positive cells were increased in the Jengjengamiyjintang administrated groups compared to that of control groups. Severe degranulation of CCK-8- and serotonin-immunoreactive cells were observed in control groups but these phenomenon was seldom in the Jengjengamiyjintang administrated groups. Serotonin-immunoreactive cells were significantly decreased in control groups but increased in Jengjengamiyjintang administrated groups compared with control groups. According to these result, it is suggested that Jengjengamiyjintang would accelarat the healing of the duodenal ulcer but the functional mechanisms were unknown.
Mostrar más [+] Menos [-]Histological study on the injury of the seminiferous tubules of the pheasant (Phasianus colchicus) following 60Co gamma-irradiation
1994
Lee, D.M. (Kunsan Junior College, Kunsan (Korea Republic). Department of Radiotechnology)
Effect of filtrates of Serpulina (Treponema) hyodysenteriae on the epithelium in colonic loops in swine
1993
Kang, B.H. (Korea Research Institute of Chemical Technology, Taejon (Korea Republic). Toxicology Research Center) | Olander, H.J. (California University, California (USA). School of Veterinary Medicine)
Distributions of proliferative epithelial cells in gastrointestinal tracts by anti-bromodeoxyuridine monoclonal antibody
1993
Kwak, S.D. | Park, S.S. | Kang, W.H. (Gyeongsang National University, Chinju (Korea Republic). College of Veterinary Medicine)
Spermiogenesis and fine structure of the sertoli cell junctional specialization in the Jindo dog - (2) - Fine structure of the sertoli cell junctional specialization
1992
Park, Y.S. | Lee, J.H. (Chonnam National University, Kwangju (Korea Republic). College of Veterinary Medicine)
Spermiogenesis and fine structure of the sertoli cell junctional specialization in the Jindo dog - (1) - Studies on spermiogenesis in the Jindo dog
1992
Park, Y.S. | Lee, J.H. (Chonnam National University, Kwangju (Korea Republic). Department of Veterinary Anatomy)
An immunohistochemical study of the gastro-entero-pancreatic endocrine cells in the alimentary tract and the pancreas of the fresh water turtle, Geoclemys reevesii
1992
Kim, J.B. | Lee, J.H. (Kyungpook National University, Taegu (Korea Republic). College of Veterinary Medicine)
An immunohistochemical study on the endocrine cells in the gastrointestinal tract of the snakehead, Ophicephalus argus
1992
Kim, J.M. | Lee, J.H. (Kyungpook National University, Taegu (Korea Republic). College of Veterinary Medicine)
Studies on the digestive gland structures of domestic and experimental animals-(2)-The renewal cycle of the cells in the intestinal mucosa of suckling mouse
1992
Kwak, S.D. (Gyeongsang Nat'l Univ., Chinju (Korea Republic). Coll. of Veterinary Medicine)