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Title 

Tauroursodeoxycholic acid enhances the pre-implantation embryo development by reducing apoptosis in pigs

 

돼지 난자의 초기배발달 동안 세포자살을 줄여주는 타우로우르소디콜릭 엑시드 효과

Authors 

Ji Su KimBong Seok SongKyu-Sun LeeD H KimSun-Uk KimY K ChooKyu Tae ChangD B Koo

Publisher 

Blackwell Publishing

Issue Date 

2012

Citation 

Reproduction in Domestic Animals, vol. 47, no. 0, pp. 791-798

Abstract 

Apoptosis is an important determinant of the normal development of pre-implantation embryos in vitro. Recently, endoplasmic reticulum (ER) stress-mediated apoptosis has been extensively investigated in a wide variety of diseases. Efficient functioning of the ER is essential for most cellular activities and survival. Tauroursodeoxycholic acid (TUDCA), an endogenous bile acid, has been reported to attenuate ER stress-mediated cell death by interrupting the classic pathways of apoptosis. Therefore, in this study, the anti-apoptotic effect of TUDCA on ER stress-induced apoptosis was examined in pre-implantation pig embryos. Also, tunicamycin was used to investigate the effects of ER stress on pig embryo development. After in vitro maturation and fertilization, presumptive pig embryos were cultured in NCSU-23 medium supplemented with TUDCA or TM for 6days at 39°C, 5% CO 2 in air. All data were analysed using one-way anova and Duncan's multiple range test in the statistical analysis system (SAS). In addition, we also determined the optimal TM and TUDCA concentrations. Samples were treated with TM at concentrations of 0, 1, 2 or 5μm and with TUDCA at concentrations of 0, 100, 200 or 300μm. When TM was used during in vitro culture, only 8.2% (8/97) of the embryos developed to the blastocyst stage when the treatment concentration was 1μm compared with 27.4% (28/102) of the embryos in the control group (p<0.05). In contrast, the frequency of blastocyst formation and the number of cells were higher when treated with 200μm TUDCA compared with the control group (32.8% and 39.5 vs 22.2% and 35.6, p<0.05). Moreover, the developmental rate to the blastocyst stage embryo in the group treated with TM and TUDCA was not significantly different from that of the control group (17.8%, 26/142 vs 24.9%, 36/145). Furthermore, the blastocyst cell number was enhanced (31.9 vs 36.9) and apoptosis reduced (TUNEL-positive nuclei number, 6.0 vs 3.2) by TUDCA treatment in pig embryos. In the real-time quantitative RT-PCR analysis, the expression of anti-apoptotic Bcl-XL gene was shown to be increased in the blastocyst stage because of TUDCA treatment, whereas expression of pro-apoptotic Bax was decreased. In addition, we also found that TUDCA decreased the rate of TM-induced apoptosis in the pre-implantation stage. Taken together, our results indicate that TUDCA improves the developmental competence of pig embryos by modulating ER stress-induced apoptosis during the pre-implantation stage.

ISSN 

0936-6768

Link 

http://dx.doi.org/10.1111/j.1439-0531.2011.01969.x

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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