Journals / Kafkas Üniversitesi Veteriner Fakültesi Dergisi / 2011 / Cilt: 17 - Sayı: 4

Sığır oositlerinin ICSI sonrası aktivasyonu ve embriyonun gelişim aşamalarına göre aktivasyonun etkileri

Activation of bovine oocytes following ICSI and effect of activation on embryo according to developmental stages

Pages
631–634
DOI
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⚡ TL;DR(Too Long; Didn't Read)

In conclusion, the activation of bovine oocytes after ICSI is obligated to apply, and Ca ionophore was a practical and rapid activator to incite cleavage, but inadequate for embryos to reach the morula and blastocyst stages.

📌 3 Key Takeaways

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Objective & Hypothesis:In the present study the aim was investigate to Ca ionophore activation in fertilized oocytes by using Intracytoplasmic sperm injection (ICSI) method and the effects of activation considering the stages of embryo development.
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Key Findings & Data:In vitro maturation of A quality COCs (n=500) was performed in TCM 199 medium at 39°C in an atmosphere of 5% CO2 in air with maximum humidity for 22 h.
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Conclusion & Impact:In conclusion, the activation of bovine oocytes after ICSI is obligated to apply, and Ca ionophore was a practical and rapid activator to incite cleavage, but inadequate for embryos to reach the morula and blastocyst stages.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:oosit olgunlaşması · Bovidae · blastosist

Abstract

In the present study the aim was investigate to Ca ionophore activation in fertilized oocytes by using Intracytoplasmic sperm injection (ICSI) method and the effects of activation considering the stages of embryo development. Cumulus-oocyte complexes (COCs) were collected by aspiration method from the ovaries of cattle and heifers slaughtered at an abattoir. In vitro maturation of A quality COCs (n=500) was performed in TCM 199 medium at 39°C in an atmosphere of 5% CO2 in air with maximum humidity for 22 h. Subsequently, ICSI was carried out to oocytes and randomly divided into two groups. In Group I (n=250; study group) consisted of oocytes activated with 5 &#956;M Ca ionophore at 38.5°C for 5 min, and in Group II (n=250; control group) contained oocytes without any activation. In Group I cleavage, morula and blastocyst rates were determined as 44.8%, 17.2% and 11.6%, respectively. In Group II the rates were established as 26.8%, 9.2% and 3.2%, respectively. Statistically the difference between groups considering the cleavage rates were obtained significantly (P<0.001); however, difference between groups considering morula and blastocyst rates was not determined significantly (P>0.05). In conclusion, the activation of bovine oocytes after ICSI is obligated to apply, and Ca ionophore was a practical and rapid activator to incite cleavage, but inadequate for embryos to reach the morula and blastocyst stages.

Özet

Bu çalışmada amaç ICSI uygulanan oositlerin Ca iyonofor ile aktivasyonu ve bu aktivasyon yönteminin embriyonik gelişim aşamalarına göre etkilerinin araştırılmasıdır. Çalışma materyalini mezbahada kesilen inek ve düve ovaryumlarından aspirasyon metodu ile toplanan kumulus oosit kompleksleri oluşturdu. A kalite kumulus oosit komplekslerinin (n=500) in vitro maturasyonu TCM-199 vasatında, 39°C’de %5 CO2 içeren maksimum neme sahip ortamda 22 saat süreyle inkübe edilerek sağlandı. Matur oositler seçilerek rastgele iki gruba ayrıldı ve ICSI işlemi gerçekleştirildi. Grup I’de (n=250) bulunan oositler 5 µM Ca iyonofor ile 38.5°C’de, 5 dak. süreyle aktive edildi. Grup II’de (n=250) bulunan oositler ise kontrol grubu olarak alındı ve herhangi bir aktivasyon işlemi uygulanmadan ICSI sonrası kültür vasatına kondu. Grup I’de bölünme, morula ve blastosist oranları sırasıyla %44.8, %17.2 ve %11.6 olarak bulunurken, Grup II’de bu oranlar sırasıyla %26.8, %8.2 ve %3.2 olarak belirlendi. Bölünme oranları açısından gruplar arasındaki fark önemli bulunurken (P 0.05). Sonuç olarak, sığır oositlerinde ICSI sonrası aktivasyonun zorunlu olduğu, bölünmenin başlatılmasında Ca iyonofor ile aktivasyonun pratik ve hızlı bir yöntem olduğu fakat embriyoların morula ve blastosist aşamalarına ulaşmasında yetersiz kaldığı belirlendi.

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Cite This Article

ACAR, D. B., BAŞTAN, A. (2011). Sığır oositlerinin ICSI sonrası aktivasyonu ve embriyonun gelişim aşamalarına göre aktivasyonun etkileri. Kafkas Üniversitesi Veteriner Fakültesi Dergisi, Cilt: 17 - Sayı: 4, 631–634. https://ajindex.com/articles/273168

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