Quantitative proteomics and functional analysis identified novel targets for missed abortion

Area of Science:

• Reproductive biology
• Proteomics
• Molecular mechanisms of pregnancy complications

Background:

• Missed abortion (MA) is a pregnancy complication with increasing incidence.
• The molecular underpinnings of MA, particularly in the decidua, remain largely unknown.
• Understanding these mechanisms is crucial for improving diagnosis and treatment.

Purpose of the Study:

• To identify molecular signaling pathways and proteins involved in missed abortion.
• To compare the decidual proteome between normal pregnancy and MA.
• To elucidate the role of specific proteins in MA pathophysiology.

Main Methods:

• Quantitative proteomics using HPLC-MS/MS and iTRAQ labeling.
• Comparative analysis of decidual proteins from normal pregnancy and MA samples.
• Integrated bioinformatics analysis of decidua and villi tissues.

Main Results:

• Identified 2277 proteins in decidua, with 232 differentially expressed in MA.
• Discovered altered pathways including ribosome and cellular metabolism signaling in MA.
• Found Importin 9, Cullin 1, and COX6C to be critical, with COX6C significantly downregulated in MA decidua and villi.
• COX6C knockdown inhibited apoptosis in cell lines, suggesting a protective role.

Conclusions:

• The study maps the regulatory protein network in MA, revealing key molecular players.
• Altered expression of proteins like COX6C contributes significantly to MA pathophysiology.
• COX6C may possess protective effects, offering potential therapeutic targets for MA.