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VIP History: Research Comparison — Mechanism, Focus, and Endpoints Across Eras
The evolution of VIP research reflects fundamental shifts in how researchers understood the peptide's biological role and therapeutic potential. 1970–1985 Gastrointestinal and vascular physiology Smooth muscle relaxation via cAMP elevation Vasodilation, intest
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- The evolution of VIP research reflects fundamental shifts in how researchers understood the peptide's biological role and therapeutic potential.
- 1970–1985
- Gastrointestinal and vascular physiology
- Smooth muscle relaxation via cAMP elevation
- Vasodilation, intestinal secretion, gastric acid inhibition
- VIP understood as a gut-brain neuropeptide with local digestive and vascular effects. Immune and CNS roles not yet recognized
- 1985–2000
- Receptor characterization and neuroanatomy
- VPAC1/VPAC2 cloning, receptor distribution mapping
- Receptor binding affinity, tissue expression patterns, neural localization
- Receptor mapping revealed VIP's highest expression in brain and immune tissues, forcing reconsideration of its primary biological functions
- 2000–2010
- Immunomodulation and Th1/Th2 balance
- T-cell differentiation, cytokine regulation, NF-κB inhibition
- Pro-inflammatory cytokine suppression, Treg induction, Th2 shift
- VIP recognized as an endogenous anti-inflammatory mediator with therapeutic potential in autoimmune disease. Research shifted from physiology to immunology
- 2010–present
- Neuroprotection and neuroinflammation
- Microglial activation inhibition, neuronal survival signaling, BBB integrity
- Neuronal apoptosis, microglial M1/M2 polarization, cognitive outcomes
- Current VIP research emphasizes CNS applications. Alzheimer's, Parkinson's, traumatic brain injury. With focus on neuroinflammation resolution and synaptic preservation