ER-stress and apoptosis: molecular mechanisms and potential relevance in infection

Area of Science:

• Cellular biology
• Molecular biology
• Immunology

Background:

• Endoplasmic reticulum (ER) stress is a cellular state that can trigger apoptosis, or programmed cell death.
• While the molecular mechanisms initiating apoptosis are understood, upstream signaling pathways connecting ER stress to apoptosis remain largely unclear.
• The Bcl-2 family of proteins plays a crucial role in regulating apoptosis during ER stress.

Purpose of the Study:

• To elucidate the upstream signaling pathways that link ER stress to apoptosis.
• To discuss the role of Bcl-2 family proteins in mediating ER stress-induced apoptosis.
• To explore the relevance of these pathways in the context of microbial infections.

Main Methods:

• The study will discuss existing molecular data and signaling pathways.
• Focus on the interplay between ER stress, Bcl-2 family proteins, and mitochondrial apoptosis.
• Literature review and theoretical discussion.

Main Results:

• Apoptosis is a key cellular response to overwhelming ER stress.
• Pro- and anti-apoptotic Bcl-2 family proteins are confirmed targets regulating ER-stress-induced apoptosis.
• Mitochondrial apoptosis is triggered through specific pathways linked to ER stress.

Conclusions:

• Understanding the upstream pathways of ER stress-induced apoptosis is critical.
• The Bcl-2 family is central to the decision between cell survival and apoptosis under ER stress.
• These mechanisms may have significant implications for cellular responses during microbial infections.