• 한국수정란이식학회지
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• 제21권4호
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• pp.323-330
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• 2006

본 연구의 목적은 3주 동안 장기간 냉각상태로 보관된 개 정자의 기능적 특성을 알아보고자 두 종류의 정자 희석액, Glucose-BSA(G-BSA), Dimitropoulos-II(BIMI)가 정자의 기능적 특성에 미치는 영향을 알아보고자 한다. 개 정액을 수지법에 의해 채취하여 원심분리한 후 정장은 제거하였다. 정자를 G-BSA나 DIMI으로 희석하여 최종 농도를 $100\times10^6$ sperm/ml로 하였다. 희석된 정자를 정자 운송 시스템을 이용하여 루지애나 주립 대학에서 뉴올리언즈 실험실까지 운송하였다. 정자 운송 시스템은 $20^{\circ}C$에서 $9^{\circ}C$까지 분당 $0.08^{\circ}C$ 냉각율로 설정하였다. 희석된 정자는 $4^{\circ}C$에서 3주간 보관하였다. 보관 1일부터, 매주 단위로 정자의 활력, 정자 원형질막 고유성(생존성), 정자 첨체의 고유성을 검사하였다. 또한 체외조건하에서의 정자 번식 능력을 평가하기 위해 zona binding assay를 실시하였다. 실험 결과 냉각 상태로 3주 동안 보관된 개 정자는 여전히 정자의 기능적 특성을 나타냈다. 냉각기간이 길어질수록 정자의 활력 및 생존성은 감소하였으며(P<0.01), 첨체의 고유성은 냉각기간에 따라 감소하였으나 유의성은 없었다. 정자의 특성 중 활력이 다른 특성에 비해 냉각처리에 민감한 반응을 보였다. G-BSA배지에 보관된 정자의 활력 및 생존성이 DIMI에 비해 높게 나타났으며, 1 주 동안 보관된 정자의 생존성의 비교시 유의성이 높게 나타났다(P<0.05). 그러나 첨체의 고유성은 1일 동안 DIMI에 보관된 정자에서 높게 나타났다(P<0.05). 3주 동안 냉각상태로 보관된 개 정자는 여전히 난자의 투명대에 결합하는 능력을 보였으며, G-BSA에 보관된 정자의 경우 난자에 부착되는 평균 정자 수가 보관일수에 따라 유의적으로 감소하였다(P<0.05). 그러나 희석액 종류에 따른 난자에 부착되는 평균 정자 수의 유의적 차이는 없었다. 정자의 활력 및 생존성과 난자의 투명대에 결합하는 정자 수와의 상관관계를 본 결과, 활력 및 생존성이 높은 정자일수록 난자의 투명대에 많이 결합하여 정자의 잠재적 번식력이 증가함을 보였다. 결론적으로 G-BSA나 DIMI의 희석액으로 희석된 후 $4^{\circ}C$에서 냉각 보관된 정자는 3주 동안 정자의 기능적 특성을 유지하였으며 냉각 보관 2주까지 좋은 성적의 정자 특성을 나타냈다. 개 정자 냉각 보존에 대안적인 희석액으로 G-BSA도 사용 가능한 것으로 사료된다.

• 생명과학회지
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• 제19권8호
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• pp.1055-1061
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• 2009

${\alpha}$-amino-3-hydroxy-5-methyl-4-isoxazole propionate (AMPA) 수용체는 중추신경계에 널리 발현하며, 연접부위에서 글루타메이트에 의한 흥분성 신경전달의 역할을 행한다. 이러한 수용체의 조절은 학습과 기억에 관여한다. 본 연구에서는 AMPA receptor subunit glutamate receptor-interacting protein 1 (GRIP1)과 결합하는 단백질로 armadillo family인 p0071/plakophilin-4을 분리하였다. GRIPl 단백질은 p0071/plakophilin-4 단백질의 C-말단과 결합하며, armadillo family 단백질 중 p0071/plakophilin-4 과만 결합한다. 효모 two-hybrid assay에서 GRIPl의 Postsynaptic density-95/Discs large/Zona occludens-1 (PDZ) 영역이 p0071/plakophilin-4 단백질과의 결합에 관여하며, p0071/plakophilin-4 단백질의 C-말단 아미노산인 "S-X-V" 배열이 결합에 필수적이었다. 이러한 결합은 뇌 균질액에서 Glutathione S-transferase (GST) pull-down assay와 공면역침강법으로 확인하였다. 이러한 결과들은 AMPA 수용체가 연접후막에 안정적으로 위치하는 새로운 역할을 시사한다.

• 한국동물번식학회:학술대회논문집
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• 한국동물번식학회 2001년도 춘계학술발표대회
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• pp.13-13
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• 2001

This study was undertaken to evaluate the effects of catalase using xanthine (X) - xanthine oxidase (XO) system on in vitro maturation and fertilization in pig. When follicular oocytes were cultured in maturation medium with X and/or XO, the maturation rates were not significantly different between in medium with and without catalase despite of different culture periods. However, significantly (P<0.05) higher maturation rates were obrained in culture with X-XO system. The rates of degenerated oocytes were increased with culture periods prolonged, and were significantly (P<0.05) higher in medium without than with catalase at 120 h of culture. On the other hand, the parthenogenetic oocytes were observed with high proportions at 72 h of culture, hut were not different in medium with and without catalase at various times of culture. In another experiment, the frozen-thawed boar spermatozoa treated with X-XO system for in vitro fertilization. The penetration rates were higher in medium with that than without catalase during the in vitro fertilization with, none (P<0.05), XO and X＋XO. On the other hand, when sperm were treated with none, X, XO and X＋XO, lipid peroxidation were higher in medium without that than with catalase. However, the changes in sperm penetration and lipid peroxidation showed opposite patterns. The sperm suspensions were also treated with X and/or XO for assay of sulfhydryl (-SH) group content. Under the above all conditions, sperm-SH group were higher detected In medium with that than without catalase. The activity of sperm binding to zona pellucida was also evaluated through binding to salt-stored porcine oocytes. In control group, sperm binding to zona pellucida were higher than in medium with X, XO and X＋XO groups. No significant differences, however, were observed between medium with and without catalase. In conclusion, the exposure of follicular oocytes and spermatozoa to X-XO system may be caused stimulating in vitro maturation and fertilization in pig. This work was supported by grant No. 2000-1-22200-001-3 from the Basic Research Program of the Korea Science & Engineering Foundation.

• Clinical and Experimental Reproductive Medicine
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• 제19권2호
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• pp.169-174
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• 1992

Previous studies have indicated that immunological factor is responsible for the infertility. We have detected sperm antibodies in ZIFT patients which grouped as fertilization failure (A; n=18) and low fertilization rate (${\leq}50%$)(B; n=20). Patients, however, had normal oocytes and sperms. We collected serum from wives and semen from husbands and donors (fertile sperm), if it was needed. We examined class, binding patterns and amounts of antisperm antibodies(ASA) by direct and indirect immunobead binding assay. In group A, 11 husbands were ASA positive showing 62.2% and 61.1% binding with IgA and IgG, respectively, and two wives were ASA positive showing 70.0% and 71.0% binding with IgA and IgG, respectively. Binding sites were mainly at the head of sperms (84%). In group B, 8 husbands were ASA positive showing 37.5% and 40.0% binding with IgA and IgG, respectively, and two wives were ASA positive showing 41.3% and 42.0% binding with IgA and IgG, respectively. Binding sites were also mainly at the head of sperms (78%). For the treatment of ZIFT patients who had fertilization failure at the first trial, we used albumin fractionation method and dilution method with 30% fetal cord serum (FCS) to reduce the titer of ASA. We used partial zona dissection (P.Z.D.) method for wives who have antisperm antibodies in their serum. According to represented method, we could inhance the fertilization rate to 60.0% by albumin fractionation and 20.0% by P.Z.D., respectively. We concluded that the use of micromanipulation like P.Z.D. or the other sperm processing methods is required to increase a chance of fertilization. This result suggested that it should be a prerequisite to test antisperm antibodies prior to entering assisted reproductive technologies (ART) programs.

• 한국임상수의학회지
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• 제9권2호
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• pp.373-390
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• 1992

To assay the fertilizing capacity of domestic animal spermatozoa by hamster test, semen were collected from 13 boars(Duroc. Landrace and Yorkshire) which had been proved to be fertile in the past. then, were preserved in BWW medium or in raw state at 18$^{\circ}C$ or at room temperature. The preserved semen were given each different treatment according to the experimental design and coincubated with zona-free hamster ova for 5 hours. The ova were stained by lacmoid and examined under phase contrast microscope to investigate the rates of ova bound with sperm(sperm binding). ova penetrated by sperm(penetration) and formation of a male pronucleus(pronucleus formation) and also numbers of both bound and penetrated sperm per ovum. Between BWW and TBM medium for boar sperm. no difference in the results of hamster test was obtained. The boar spermatozoa in BWW medium, BWW with caffeine, BWW with heparin, and BWW with both caffeine and heparin showed no difference in the results of hamster test. The boar spermatozoa in BWW medium containing both calcium and RSA showed considerably higher rates of sperm binding, penetration and pronucleus formation as well as higher numbers of both bound and penetrated sperm than those not containing calcium with or without BSA( p<0.01) and also the same results higher than that containing calcium without BSA( p< 0.05). The boar spermatozoa irradiated by X-ray(70 KVP, 20mA) for 3 seconds. then, maintained at 18$^{\circ}C$ for 18 hours showed considerably lower rate of sperm binding than all the other groups including the control and X-ray groups irradiated by smaller dose or maintained for shorter period(p<0.01), and also showed lower number of bound sperm than the other groups(p<0.01, p<0.05). All the control groups of both raw and diluted sperm in BWM medium showed higher rates of sperm binding, penetration and pronucleus formation as well as higher number of penetrated sperm than all the X-ray groups irradiated for 3 seconds(70KVP, 20mA) and maintained for either 3 or 18 hours (p<0.01, p<0.05). At the same time the control groups of diluted sperm showed considerably higher rates of sperm penetration and pronucleus formation than the control group of raw sperm( p<0.01). These results indicates that fertile boar sperm showed considerably lower rates In the results of hamster test, when incubated in the medium without calcium and irradiated by X-ray than when incubated in the medium with calcium and not irradiated by X-ray, respectively, to prove consequently that hamster test would be of great value in assaying the fertilizing capacity of boar spermatozoa.