The effects of various protein supplementations on In vitro maturation of cat oocytes
Bu çalışma, medyuma katılan değişik protein kaynaklarının kedi oositlerinin in vitro olgunlaştırılması üzerine etkilerini araştırmak amacıyla yapıldı. Çalışmada, kısırlaştırma operasyonu uygulanmış 40 kediden kazanılan 1013 oosit kullanıldı. Ovaryumlar, 2530° C sıcaklıktaki PBS solüsyonu içerisinde laboratuvara taşındı. Kazanılan oositler, farklı protein kaynaklarını içeren Ham’s F-10 medyumu içerisinde ve 38.5°C sıcaklık, %100’e yakın nem ve gaz karışımının (%5 O2, %5 CO2, %90 N2) sağlandığı inkübatör ortamında 48 saat süreyle olgunlaşmaya bırakıldı. Sunulan çalışmada dört uygulama grubu oluşturuldu. Grup I: Fetal Buzağı Serumu (FCS), Grup II: Sığır Serum Albumini (BSA), Grup III: Östrustaki Kedi Serumu (OCS), Grup IV: Kontrol (protein katkısı yok). Olgunlaşma sürecinin sonunda, oositler fikse edilerek boyandı. Olgunlaşma oranları, faz - kontrast mikroskopta (x400) yapılan incelemelerle belirlendi. Metafaz II (M II) dönemine ulaşma oranları Grup I, II, III ve IV için sırasıyla %6.2 (14/255), %16.5 (43/260), %13.1 (36/273) ve %13.3 (30/225) olarak bulundu. Protein kaynağı olarak FCS’nin kullanıldığı Grup I deki olgunlaşma oranları, diğerlerinden oldukça düşük olarak bulundu (P
Kedi oositlerinin in vitro olgunlaştırılması üzerine değişik protein katkılarının etkileri
This study has been conducted to evaluate the effects of certain media containing various protein sources on the in vitromaturation (IVM) of cat oocytes. In this study 1013 oocytes obtained from 40 cats underwent ovario-hysterectomy surgeriesfor the purposes of spaying were used. Ovaries were brought to the laboratory in Dulbecco’s PBS at 25-30°C. The recoveredoocytes were left to mature for 48 hours in Ham’s F-10 media supplemented with different protein sources. In this study fourexperimental groups were designed: Group I: Fetal Calf Serum (FCS), Group II: Bovine Serum Albumin (BSA), Group III: EstrusCat Serum (OCS), Group IV: Control (No protein supplementation). The incubator conditions were 38.5°C temperature, almost100% humidity and a gaseous mixture (5% O2, 5% CO2, 90% N2). At the end of the maturation period, the oocytes were fixed and stained. The maturation rates were determined under 400 x magnification on a phase-contrast microscope. Metaphase II(M II) rates were 6.2% (14/255), 16.5% (43/260), 13.1% (36/273) and 13.3% (30/225) in Groups I, II, III and IV, respectively. The maturation rate in the Group I where FCS was used as protein additive was significantly lower (P<0.001) than other groups.The ratio of oocytes reaching M I+M II stages was 28.6% (73/255), 40.3% (105/260), 31.1% (85/273) and 30.2% (68/225),respectively. The difference in the Group II (BSA added), was significantly superior to the other groups (P<0.05). In conclusion,although homologous protein source OCS was ineffective and FCS has negative effects, it was determined that using BSA asthe protein additive for the medium will be beneficial for in vitro maturation of cat oocytes.
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- 1. Pope CE: Embryo technology in conservation efforts for endangered felids. Theriogenology, 53, 163-174, 2000.
- 2. Evecen M, Cirit Ü, Demir K, Özdaş ÖB, Taş M, Birler S, Pabuccuoğlu S: Effects of estrous cycle stage and transport temperature of ovaries on in vitro maturation of canine oocytes. Anim Reprod Sci, 117, 160-165, 2010.
- 3. Evecen M, Cirit Ü, Demir K, Karaman E, Bakırer G, Hamzaoğlu Aİ, Alkan S, Birler S, Pabuccuoğlu S: Comparison of two diff erent media for in vitro production of dog embryos. Kafkas Univ Vet Fak Derg, 16 (6): 897-902, 2010.
- 4. Taş M, Evecen M, Özdaş ÖB, Cirit Ü,Demir K, Birler S, Pabuccuoğlu S: Effect of transport and storage temperature, of ovaries on in vitro maturation of bitch oocytes. Anim Reprod Sci, 96, 30-34, 2006.
- 5. Yindee K, Saikhun J, Pavasuthipaisit K: Somatic cell nuclear transfer in domestic cat oocytes treated with IGF-I for in vitro maturation. Theriogenology, 59, 1775-1786, 2003.
- 6. Karja NWK, Otoi T, Murakami M, Fahrudin M, Suzuki T: In vitro maturati on, ferti lization and development of domesti c cat oocytes recovered from ovaries collected at three stages of the reproducti ve cycle. Theriogenology, 57, 2289-2298, 2002.
- 7. Goodrowe KL: Cat reproduction and artificial breeding technologies. Anim Reprod Sci, 28, 389-397, 1992.
- 8. Farstad W: Current state in biotechnology in canine and cat reproduction. Anim Reprod Sci, 60-61, 375-387, 2000.
- 9. Robinson JJ: Nutrition and reproduction. Anim Reprod Sci, 42, 25-34, 1996.
- 10. Johnston LA, O’Brien SJ, Wildt DE: In vitro maturati on and ferti lization of domestic cat follicular oocytes. Gam Res, 24, 343356, 1989.
- 11. Freistedt P, Stojkovic M, Wolf E: Efficient in vitro producti on of cat embryos in modifi ed syntheti c oviduct fluid medium: Eff ects of season and ovarian status. Biol Reprod, 65, 9-13, 2001.
- 12. Evecen M, Özdaş ÖB, Pabuccuoğlu S, Birler S, Tek Ç, İleri İK: The eff ects reproductive status of queens on in vitro maturati on of cat oocytes. Indian Vet J, 81, 1005-1009, 2004.
- 13. Pope CE, McRae MA, Plair BL, Keller GL, Dresser BL: In vitro and in vivo development of embryos produced by in vitro maturation and in vitro ferti lization of cat oocytes. J Reprod Fert, 51, 69-82, 1997.
- 14. Evecen M, Cirit Ü, Demir K, Karaman E, Hamzaoğlu Aİ, Bakırer G: Developmental competence of domestic cat oocytes from ovaries stored at various durations at 4°C temperature. Anim Reprod Sci, 116, 169-172, 2009.
- 15. Wood TC, Byers AP, Jannette BD, Wildt DE: Influence of protein and hormone supplementation on in vitro maturation and ferti lization of domestic cat eggs. J Reprod Fert, 104, 315-323, 1995.
- 16. Evecen, M, Baran A, Tek Ç: The effects of gonadotrophins on in vitro maturation of cat oocytes. Tr J Vet Anim Sci, 26, 1315-1320, 2002.
- 17. Schramm RD, Bavister BD: Effects of gonadotrophins, growth hormone and prolactin in developmental competence of domestic cat oocytes matured in vitro. Reprod Ferti l Dev, 7, 1061-1066, 1995.
- 18. Evecen M, Baran A, Alkan S, Özdaş ÖB, Tek Ç: The eff ects of BSA and FCS on in vitro maturation of bitch oocytes. Tr J Vet Anim Sci, 26, 1453-1458, 2002.
- 19. Evecen M, Şahin BE, Baran A, Ak K, İleri İK: In vitro ferti lization of cat oocytes. J Fac Vet Univ Istanbul, 29, 253-258, 2003.
- 20. Bogliolo L, Leoni G, Ledda S, Naitana S, Zedda M, Carluccio A, Pau S: Intracytoplasmic sperm injecti on of in vitro matured oocytes of domestic cats with frozen-thawed epididymal spermatozoa. Theriogenology, 56, 955-967, 2001.
- 21. Evecen M, Atalla H, Birler S, Baran A, Ak K: Studies on the in vitro maturation of cat oocytes. Tr J Vet Anim Sci, 27, 1409-1412, 2003.
- 22. Goodrowe KL, Hay M, King WA. Nuclear maturation of domestic cat ovarian oocytes in vitro. Biol Reprod, 45, 466-470, 1991.
- 23. Katska L, Rynska B, Kania G, Smorag S, Gajda B, Pienkowski M: Timing nuclear maturation of nonstored and stored domesti c cat oocytes. Theriogenology, 59, 1567-1574, 2003.