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Analysis of Sexed Sperm by Flow Cytometry in Hanwoo (Korean Native Cattle)
유한준,이경진,이용승,윤필상,박정준,김형철,박춘근 사단법인 한국동물생명공학회 2012 Reproductive & developmental biology Vol.36 No.1
This study evaluated a sexed sperm ability to produce embryos by flow cytometer. Hanwoo bulls sperm were separated to X and Y sperm via Hoechst 33342 stained with near UV laser or performed the pre-sorted without near UV laser beam in flow cytometry. Pre-sorted sperm had significantly higher viability (84±1.15 %, p<0.05) compared to other sorted groups in frozen-thawed semen. For fresh semen, pre-sorted sperm had the higher viability (79±3 %,p<0.05) than those of the X and Y sperm (44.7±1.67 and 41.7±1.2 %) separated by differences of DNA content. On the other hand, pre-sorted and X sperm sorted according to differences in DNA content had significantly higher viabilities (24.3±1.2 and 25.7±0.9 %, p<0.05) compared to that of the sorted Y sperm (13.7±1.2 %) in the hypoosmotic swelling test. The proportion acrosome reaction in the sorted X sperm was higher (55.0±1.7 and 45.0±1.5 %) than those of the sorted Y-sperm (32.3±0.9 %, p<0.05). However, the sperm morphologies of the sorted groups were not significantly differences. In conclusion, the sex-sorting procedure by flow cytometry affected some characteristics of Hanwoo sperm. Further study is needed to determine the optimal procedures to enhance male and female embryos and sorting accuracy.
도축 유래 황체난소, 낭종난소 및 정상난소로부터의 미성숙 난자 회수율 비교에 관한 연구
유한준,박정준,김기원,이승환,박춘근 한국동물생명공학회(구 한국동물번식학회) 2011 발생공학 국제심포지엄 및 학술대회 Vol.2011 No.1
본 연구는 도축된 한우의 황체난소, 낭종난소, 정상난소를 이용하여 체외 수정란 생산 시, 각각의 난소별 수정란 생산율을 분석하기 위하여 각 난소별 미성숙 난자의 회수율을 조사하였다. 15 18℃로 운반된 도축 유래 난소로부터 18G 주사침이 장착된 10 ml 주사 기를 이용하여 적색체 또는 황체가 형성된 난소, 직경 15 mm 이상의 낭종성 난소 및 4 10 mm의 정상난소로부터 미성숙 난자를 회수하여, 체외수정을 통한 분할율을 확인하 였다. 총 회수된 미성숙 난자와 이용 가능한 미성숙 난자의 수를 조사한 결과, 황체난소, 낭종난소 및 정상난소에서 총 회수된 미성숙 난자는 18.94±1.11, 18.57±1.42 및 20.24± 2.28개로 관찰되었으며, 그 중 성숙 배양에 이용된 미성숙 난자는 7.92±0.77, 8.22±1.31 및 10.70±1.02개로 확인되었고, 모두 유의적인 차이는 관찰되지 않았다(p<0.05). 또한, 난 소에서 총 회수된 미성숙 난자에 대한 성숙 배양으로의 효율은 황체난소, 낭종난소 및 정상난소에서 각 42.39±5.01, 43.60±5.15 및 53.55±3.19%로 조사되었으며 유의적인 차 이는 나타나지 않았다(p<0.05). 한편, 황체난소, 낭종난소 및 정상난소로부터 회수된 미성 숙 난자의 분할율은 77.46±1.60, 74.91±2.03 및 77.39±2.39%로 관찰되었고 유의적인 차 이는 나타나지 않았다(p<0.05). 본 연구의 실험 결과 황체 및 낭종난소와 정상난소에서 회수된 미성숙 난자의 개수 및 분할율에는 차이가 없다는 것을 알 수 있으며 이와 같은 결과를 통해 황체 및 낭종난소에서도 정상적인 난소에서와 마찬가지로 미성숙 난자가 채 란되며 이용가능하다는 것을 알 수 있었다. 하지만 보다 정확한 결과를 얻기 위해서는 추가적으로 성숙 및 발달율에 대한 조사가 이루어져 할 것이라고 생각된다.
Direct Embryo Collection(DEC)에 의한 한우의 수정란 채란
유한준,이용승,박정준,김기원,박춘근 韓國受精卵移植學會 2011 한국동물생명공학회지 Vol.26 No.3
This study was performed in order to simplify the operation and minimize stress of donor and be readily available in the field with low cost and high quality embryos using the Direct Embryo Collection (DEC). Donors, at random stages of the estrous cycle, received a CIDR. 7 days later, 200 mg FSH was treated with 40, 30, 20, 10 mg FSH levels in declining doses twice daily by intramuscular injection for 4 days. On the 3rd day administration of FSH, 25 mg was administered and CIDR was withdrawn. After FSH injections were complete, donors were artificially inseminated twice at 12 hr intervals. The donor cattle received 250 GnRH at time of 1 st insemination and embryos were recovered 8 days after the 1st insemination. Embryo collection from superovulated donors was performed to flushing by non-surgical methods of 3-way, 2-way and DEC (l-way). The average number of recovered embryos were 11.250.63, 12.50.65 and 11.750.48 from operations of 3-way, 2-way and DEC methods, respectively. There were no significant differences among the embryo collection methods. Also, The average number of transferable embryos were 6.250.48, 7.250.48 and 7.250.63 from each embryo collection procedures. The number of transferable embryos was no differences among the 3-way, 2-way and DEC methods, respectively. Meanwhile, the ratio of transferable embryos for all recovered embryos from DEC methods was higher as 61.7 % than 55.6 %, 58 % from methods of 3-way, 2-way. And the flushing solution required for recovering embryos by DEC method was significantly lower as 0.280.32 1 than 1.80.12 1, 1.750.10 1 from 3-way, 2-way methods (p<0.05). Also, the time required for recovering embryos by DEC methods was significantly lower as 272 min than 513, 452 min, respectively (p<0.05). In conclusion, these results suggest that DEC method for embryo collection may be effectively used for production of in vivo embryos using less flushing solution and, it might be effectively available in the field compared to conventional embryo recovery methods using 3-way or 2-way balloon catheter.
Percoll에 의한 미니돼지 정액내 세균 제거가 정자 성상과 수정란 분할에 미치는 영향
유한준,전준명,이용승,정희태,양부근,김대영,박춘근 한국동물생명공학회(구 한국동물번식학회) 2009 Reproductive & developmental biology Vol.33 No.1
The objectives of this study was to evaluate the efficiency of the bacteria eliminated sperm by percoll gradient method on sperm quality and embryo cleavage in vitro in pig. The semen of miniature pig collected by gloved-hand method pre-warmed (37℃) in thermos bottle, and separated by 65% percoll. Analysis of sperm ability was estimated by examining viability, capacitation and acrosome reaction using chlortetracycline (CTC) and the abnormality. Also, fertility of sperm was monitored with cleavage rate of embryo after IVF using separated and un-separated sperm by percoll. The result, viability of separated sperm was significantly(p<0.05) higher(83.6±2.0 vs 59.0±4.4%) than un- separated sperm. The results of CTC analysis showed the percentage of F- and B-patterned separated sperm was higher in separated that than un-separated sperm. On the contrary, the percentage of AR-patterned form un-separaed sperm was significantly(p<0.05) higher(13.6±0.8 vs 8.1±0.6%) than separated sperm. Also, abnormality of un-separated sperm was significantly(p<0.05) higher(20.2±0.4 vs 16.8±2.8%) than separated sperm. However, the cleavage rates of embryo using separated sperm by percoll and un-separated sperm had not significantly difference on 2 cell stage(9.25 vs 11.88%), 4 cell stage(26.76 vs 24.51%) and >4 cell stage(63.99 vs 63.61%) at 48h of IVF. Therefore, the sperm separated by percoll method showed improvement in sperm quality than un-separated sperm in miniature pig.
한우에서 Direct Embryo Collection(DEC)을 이용한 체내 수정란의 회수율 분석
유한준,박정준,윤필상,김기원,박춘근 韓國受精卵移植學會 2011 한국동물생명공학회지 Vol.26 No.3
This study was performed in order to determine optimum flushing solution using the direct embryo collection (DEC). Donors, at random stages of the estrous cycle, received a CIDR. 7 days later, 200 mg FSH was treated with 40, 30, 20, 10 mg FSH levels in declining doses twice daily by intramuscular injection for 4 days. On the 3 day administration of FSH, 25 mg was administered and CIDR was withdrawn. After FSH injections were complete, donors were artificially inseminated twice at 12 hr intervals. The donor cattle received 250 GnRH at time of 1 insemination and embryos were recovered 8 days after the 1 insemination. Embryo collection from superovulated donors were performed to flushing by DEC and conventional method. As a results, the average number of recovered embryos were significantly higher as 19.11.40 with DEC method than 12.00.44 with conventional embryo collection method, respectively (p<0.05). Also, The average number of transferable embryos were significantly higher (p<0.05) as 15.81.72 with DEC method than 6.90.35 from conventional embryo recovery procedures. Meanwhile, number of recovered embryos and number of recovered transferable embryos following the number of flushing times until 6 flushing were significantly higher as 8.60.53 and 8.60.53 from 2 flushing time than other groups (p<0.05). No. of Ear. B stage embryos were significantly higher as 3.90.90 and 3.90.90 with 2 flushing time in total collected embryos and transferable embryos (p<0.05). Com M stage embryos were significantly higher as 3.71.00 in 2 flushing time and as 2.20.76 in 3 flushing time for recovered embryos (p<0.05). In transferable embryos, Com. M stage embryos were significantly higher (p<0.05) as 3.71.00 in 2 flushing time and as 2.20.76 in 34 flushing time, also. No. of degradation embryos was significantly higher as 2.20.72 in 5 flushing time, On the other hand, degradation embryos was not observed in transferable embryos (p<0.05). In conclusion, these results suggest that DEC method should effective methods for production of in vivo embryos using less flushing solution following perform until 4 flushing time than conventional embryo collecting method. Also, it might be effectively collection of transferable embryos following more less procedure times compared to conventional embryo recovery methods.