CD38: An Immunomodulatory Molecule in Inflammation and Autoimmunity

Area of Science:

• Immunology
• Molecular Biology
• Biochemistry

Background:

• CD38 is a pleiotropic molecule functioning as both an enzyme and a cell surface receptor.
• It is expressed on various cell types, notably hematopoietic cells, with distinct localization (cell surface or intracellular compartments).
• CD38 influences immune cell differentiation, effector functions, and modulates NAD levels, impacting inflammation.

Purpose of the Study:

• To review current knowledge and controversies surrounding CD38's role in inflammation and autoimmunity.
• To highlight novel molecular tools that can elucidate CD38's function in autoimmune inflammation.
• To address the complexity of CD38's physiological roles in the context of immune responses.

Main Methods:

• Literature review of existing research on CD38.
• Analysis of studies investigating CD38's function in immune cells during inflammation.
• Examination of data related to CD38's involvement in autoimmune processes across different models.

Main Results:

• CD38 exhibits diverse functions, including NAD depletion, intracellular signaling, and cell adhesion.
• Its role in autoimmunity is context-dependent, showing both pathogenic and regulatory effects.
• Variability in CD38's impact is observed across different diseases, immune cells, and animal models.

Conclusions:

• The multifaceted nature of CD38 presents challenges in fully understanding its biology during autoimmune inflammation.
• Further research utilizing advanced molecular tools is necessary to resolve current knowledge gaps.
• Clarifying CD38's precise role is crucial for developing targeted therapeutic strategies for autoimmune diseases.