Cyclic AMP signaling in bivalve molluscs: an overview

Area of Science:

• Marine Biology
• Molecular Physiology
• Biochemistry

Background:

• Cyclic AMP (cAMP) signaling is crucial for physiological functions in mammals.
• Its role in non-mammalian vertebrates and invertebrates, including bivalve molluscs, is increasingly recognized.
• Existing research provides a foundation but leaves gaps in understanding bivalve cAMP pathways.

Purpose of the Study:

• To review the current knowledge on cAMP-dependent signaling in bivalve molluscs.
• To examine the structural and functional aspects of key cAMP pathway components (adenylyl cyclase, G proteins, protein kinase A).
• To discuss the role of cAMP in various bivalve physiological processes and its response to environmental stressors.

Main Methods:

• Literature review of studies from the 1980s to the present.
• Analysis of research on adenylyl cyclase, G proteins, and protein kinase A in bivalves.
• Synthesis of findings on cAMP's role in smooth muscle, heart, gills, gonads, and metabolism.
• Inclusion of recent data on environmental stress effects on the cAMP system.

Main Results:

• cAMP plays a significant role in regulating smooth muscle, heart, gills, gonads, and metabolism in bivalves.
• The core components of the cAMP signaling pathway are present and functional in bivalves.
• Environmental stressors can impact the cAMP system in these organisms.

Conclusions:

• cAMP is a widespread and important signaling molecule in bivalve physiology.
• While much is known for model species, molecular details and interactions with other pathways require further investigation.
• Future research should focus on elucidating the molecular mechanisms and cross-talk of cAMP signaling in bivalves.