Autophagy Regulates Embryonic Survival During Delayed Implantation

作者：Lee Jong Eun; Oh Hyun Ah; Song Haengseok; Jun Jin Hyun; Roh Cheong Rae; Xie Huirong; Dey S K; Lim Hyunjung Jade^*

来源：Endocrinology, 2011, 152(5): 2067-2075.

DOI：10.1210/en.2010-1456

Delayed implantation, considered a state of suspended animation, is widespread in mammals. Blastocysts under this condition remain dormant for an extended period but resume implantation competence upon favorable conditions. The underlying mechanism by which extended longevity of dormant blastocysts is maintained is not clearly understood. Using autophagy markers and the well-defined delayed implantation model in mice, we show that autophagy is important for the extended longevity of dormant blastocysts in utero during delayed implantation. However, prolonged dormancy leads to reduced developmental competency of blastocysts and cellular damage with compromised pregnancy outcome. Estrogen supplementation, which activates implantation of dormant blastocysts, induces the formation of multivesicular bodies in the trophectoderm in vivo. Collectively, our results suggest that autophagy is a critical cellular mechanism that is utilized for the prolonged survival of dormant blastocysts. (Endocrinology 152: 2067-2075, 2011)

• 出版日期2011-5