To systematically outline the expression profile of OPN3 in the skin and analyze its molecular characteristics, light detection mechanisms, and downstream signaling pathways.
Approach:
Literature Review: A comprehensive literature search was conducted in PubMed, Web of Science, and Scopus using relevant keywords to synthesize findings from various studies on OPN3.
Key Findings:
OPN3 is one of the most abundantly expressed opsins in mammalian skin, found in keratinocytes, melanocytes, fibroblasts, and other skin cells.
OPN3 detects light signals, particularly ultraviolet and short-wavelength visible light, triggering various intracellular signaling pathways.
Key signaling pathways activated by OPN3 include the G protein-mediated PLC-IP3/DAG-Ca2+ pathway and the cAMP-MITF pathway.
Dysregulation of OPN3 signaling is implicated in skin pathophysiology, including UV damage, melanoma, photoaging, and inflammatory skin diseases.
Interpretation:
OPN3 serves as a crucial link between environmental light signals and the physiological and pathological states of the skin.
Limitations:
The review does not perform a meta-analysis or assess risk of bias quantitatively due to the heterogeneity of study designs.
Conclusion:
This review outlines the expression profile of OPN3 in the skin and its roles in light detection and associated signaling pathways.
