Endoplasmic reticulum stress in periimplantation embryos

Area of Science:

• Cellular Biology
• Developmental Biology
• Reproductive Science

Background:

• Cellular stress coping mechanisms are vital for survival in changing environments.
• The unfolded protein response (UPR) is a key pathway for restoring endoplasmic reticulum (ER) homeostasis.
• UPR components are present and inducible in oocytes and preimplantation embryos.

Purpose of the Study:

• To investigate the role of UPR and ER stress coping mechanisms in preimplantation embryonic development.
• To explore the potential of UPR-associated molecules as diagnostic markers for embryo stress.
• To assess the impact of ER stress coping responses on post-implantation development.

Main Methods:

• Identification and induction of UPR-associated molecules (Perk, Ask1, Bip, Chop, Gadd34, Ire1, Atf4, Atf6, Xbp1) in embryos.
• Assessment of UPR's role in preimplantation embryo development.
• Evaluation of ER stress coping response attenuation using tauroursodeoxycholate and salubrinal on cultured embryos.

Main Results:

• UPR and associated coping responses are integral to normal preimplantation embryonic development.
• UPR molecules can potentially serve as biomarkers for diagnosing stress in preimplantation embryos.
• Attenuating ER stress with specific compounds prevented cell death in cultured embryos.

Conclusions:

• The UPR pathway plays a pivotal role in embryonic development and adaptation to ER stress.
• Further research into ER stress coping mechanisms can enhance understanding of embryonic development and in vitro potentiation.
• Targeting ER stress pathways offers potential therapeutic strategies for improving embryo viability.