Cell death pathways in graft-versus-host disease.

Area of Science:

• Immunology
• Cell Biology
• Transplantation Science

Background:

• Regulated cell death pathways (apoptosis, necroptosis, pyroptosis, ferroptosis, autophagy) are crucial in cancer, autoimmunity, and transplantation.
• Graft-versus-host disease (GVHD) is a severe complication of allogeneic hematopoietic cell transplantation, characterized by donor T-cell mediated tissue injury.
• While apoptosis in GVHD is well-studied, emerging cell death forms offer new insights.

Purpose of the Study:

• To review recent advancements in understanding the role of diverse cell death pathways in GVHD pathogenesis.
• To explore the therapeutic potential of manipulating these pathways for GVHD management.

Main Methods:

• Literature review of current research on cell death mechanisms and GVHD.
• Analysis of how different cell death pathways influence immune and non-immune cells in GVHD.
• Synthesis of therapeutic implications for targeting cell death in GVHD.

Main Results:

• Emerging cell death pathways beyond apoptosis play significant roles in regulating immune responses during GVHD.
• These pathways influence both pathogenic alloreactive T cells and protective cell populations (e.g., regulatory T cells, innate lymphoid cells, intestinal epithelial cells).

Conclusions:

• Diverse cell death pathways are integral to GVHD pathogenesis.
• Targeting these pathways presents promising therapeutic avenues for alleviating GVHD by selectively eliminating harmful cells or preserving beneficial ones.