Endometrial pinopode biomarkers: Molecules and microRNAs

Area of Science:

• Reproductive Biology
• Cell Biology
• Endocrinology

Background:

• Pinopodes are apical surface structures of uterine luminal epithelium.
• Their morphology and content differ significantly between species, notably rodents and humans.
• Pinopodes are proposed as key indicators of endometrial receptivity and the implantation window.

Purpose of the Study:

• To summarize the morphology and function of pinopodes.
• To highlight molecular markers associated with pinopodes.
• To explore the role of microRNAs in pinopode expression and endometrial receptivity.

Main Methods:

• Literature review and synthesis of existing research on pinopodes.
• Comparative analysis of pinopode morphology across species.
• Identification and discussion of molecular markers linked to pinopodes.

Main Results:

• Pinopode morphology varies, with human pinopodes containing organelles like Golgi complex and mitochondria, unlike rodent pinopodes.
• Numerous molecular markers, including integrins, LIF, and miRNAs, are associated with pinopodes.
• MicroRNAs may influence LIF expression and pinopode formation, impacting the implantation window.

Conclusions:

• Pinopodes are dynamic structures reflecting uterine receptivity.
• Associated molecular markers, particularly miRNAs, offer potential biomarkers for the implantation window.
• Further research into these markers can advance understanding of human reproduction.