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Vertebrate reproductive science and technology
RESEARCH ARTICLE

Baicalin improves IVM of pig oocytes and subsequent preimplantation embryo development by inhibiting apoptosis

Qing Guo A * , Mei-Fu Xuan A * , Zhao-Bo Luo A , Jun-Xia Wang A , Song-Shan Jin A , Xi-Jun Yin https://orcid.org/0000-0003-0322-3560 A B and Jin-Dan Kang A B
+ Author Affiliations
- Author Affiliations

A Jilin Provincial Key Laboratory of Transgenic Animal and Embryo Engineering, Yanbian University, No. 977 Gongyuan Street, Yanji, Jilin 133002, China.

B Corresponding authors. Emails: yinxj33@msn.com; kangjindan@hotmail.com

Reproduction, Fertility and Development 31(5) 983-992 https://doi.org/10.1071/RD18333
Submitted: 20 August 2018  Accepted: 25 December 2018   Published: 1 March 2019

Abstract

Baicalin, a monomer of flavonoids extracted from dried roots of Scutellaria baicalensis, is used to treat female infertility. However, the effect of baicalin on oocyte maturation is unknown. In this study we investigated the effects of baicalin on the IVM of pig oocytes and subsequent embryo development following parthenogenetic activation (PA). We found that 0.1 µg mL−1 baicalin significantly (P < 0.05) increased the IVM rate of oocytes compared with the non-treatment (control) group by reducing levels of reactive oxygen species (ROS). In addition, the mRNA expression of genes related to nuclear maturation and cumulus cell expansion, mitochondrial membrane potential and ATP content was significantly (P < 0.05) higher in baicalin-treated than control oocytes. To determine whether baicalin treatment during IVM of pig oocytes improves subsequent development of PA embryos, we measured the cleavage and blastocyst formation rates, as well as the number of cells per blastocyst. All these parameters were significantly (P < 0.05) higher in the baicalin-treated than control group. In conclusion, this study demonstrates that baicalin improves pig oocyte maturation and subsequent embryo development in vitro by inhibiting production of ROS and reducing apoptosis in oocytes.

Additional keywords: parthenogenetic activation, reactive oxygen species.


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