Ceramide: physiological and pathophysiological aspects

Area of Science:

• Cell Biology
• Biochemistry
• Immunology

Background:

• Ceramide, generated in cell membranes, plays a key role in apoptosis induction by death receptors and stress stimuli.
• Ceramide reorganizes cell membranes, forming domains that organize cellular signaling pathways.
• These domains are involved in clustering death receptors like CD95 and DR5, facilitating apoptosis.

Purpose of the Study:

• To elucidate the multifaceted roles of ceramide-enriched membrane domains in cellular processes.
• To explore the involvement of ceramide domains beyond apoptosis, including pathogen interaction and immune response.
• To highlight the connection between ceramide metabolism and human diseases.

Main Methods:

• Analysis of ceramide's role in apoptosis signaling pathways.
• Investigation of ceramide-enriched membrane domain formation and function.
• Examination of ceramide metabolism in the context of cellular stress and disease models.

Main Results:

• Ceramide-enriched membrane domains are essential for apoptosis induction by various stimuli.
• These domains mediate pathogen internalization and regulate cytokine release in infected cells.
• Alterations in ceramide metabolism are linked to significant human diseases.

Conclusions:

• Ceramide-enriched membrane domains are critical regulators of apoptosis, cellular signaling, and immune responses.
• The function of ceramide domains extends to host-pathogen interactions and inflammatory processes.
• Dysregulation of ceramide metabolism represents a potential factor in the pathogenesis of diverse human diseases, including neurological disorders, cancer, and infectious diseases.