Membrane cofactor protein (MCP; CD46): deficiency states and pathogen connections

Area of Science:

• Immunology
• Molecular Biology
• Cell Biology

Background:

• Membrane cofactor protein (MCP; CD46) is a key complement regulator.
• CD46 has diverse roles beyond complement, including in reproduction, autophagy, and T cell modulation.
• It is also part of the intracellular complement system (complosome) and acts as a receptor for multiple pathogens.

Purpose of the Study:

• To review recent advances in understanding CD46.
• To highlight the identification of disease-causing CD46 variants.
• To explore CD46's connections with pathogens and its therapeutic implications.

Main Methods:

• Literature review of recent scientific publications.
• Analysis of studies on CD46 variants and their associated diseases.
• Examination of research on CD46 as a pathogen receptor and therapeutic target.

Main Results:

• CD46 deficiencies are linked to inflammatory disorders.
• Overexpression of CD46 in cancers is a target for oncolytic agents and adenoviral vectors.
• CD46 serves as a receptor for 11 pathogens, influencing host-pathogen interactions.

Conclusions:

• CD46 is a multifunctional protein with critical roles in immunity, reproduction, and disease.
• Identifying disease-causing CD46 variants is crucial for understanding inflammatory disorders.
• CD46's pathogen-binding and therapeutic targeting potential warrant further investigation.