VIP (Vasoactive Intestinal Peptide): A Research Overview
All information here is for laboratory and educational research only. No compound referenced is approved for human or veterinary use, and nothing here is medical advice.
Vasoactive intestinal peptide (VIP) is a 28-amino-acid neuropeptide that has drawn sustained interest in immunology and inflammation laboratories. All information here is for laboratory and educational research only. No compound referenced is approved for human or veterinary use, and nothing here is medical advice. This overview summarizes how researchers study VIP within immune and inflammatory-pathway contexts.
What VIP Is
VIP belongs to the secretin/glucagon peptide superfamily and is distributed widely across neural, gastrointestinal, and immune tissues. In published research it is described as a signaling peptide that interacts with G-protein-coupled receptors, principally VPAC1 and VPAC2. Researchers study VIP as a model molecule for understanding how neuropeptides communicate with immune cells, and reference materials are handled strictly as laboratory reagents for in vitro and preclinical research.
Mechanism and What Research Explores
Studies have examined VIP signaling through VPAC1 and VPAC2 receptors and downstream cyclic-AMP pathways in immune cells. In published research, investigators characterize how VIP appears to modulate the balance of pro-inflammatory and regulatory signaling in cultured macrophages, dendritic cells, and T-cell populations. This is why VIP is frequently described as a peptide with pleiotropic immune functions. None of this work establishes any therapeutic effect; it is mechanistic and exploratory laboratory science.
Research Stage and Limitations
VIP research in the immune and inflammatory space remains largely at the in vitro and animal-model stage. Findings reported in cell cultures or in model organisms do not transfer to human outcomes, and researchers emphasize that receptor expression, peptide stability, and experimental conditions vary widely between studies. Some online community and anecdotal mentions of VIP circulate informally; these are unverified anecdotal reports, not controlled findings, and BioRegen does not make or endorse any claims based on them.
Handling and Laboratory Notes
As a peptide reagent, VIP is typically supplied lyophilized and is sensitive to temperature, moisture, and repeated freeze-thaw cycles. Laboratories generally store it cold and reconstitute it shortly before an experiment. For general reference on peptide preparation methods in a research setting, see our overview on how to reconstitute peptides. These notes describe laboratory handling only and are not instructions for any human or animal use.
Frequently Asked Questions
What receptors does VIP act on in research models?
In published research, VIP is described as signaling primarily through the VPAC1 and VPAC2 receptors, which are studied across neural and immune cell types.
Why do immunology labs study VIP?
Researchers study VIP as a model neuropeptide for understanding neuro-immune communication and how signaling peptides may influence inflammatory pathways in cultured cells and animal models.
Is VIP approved for any use?
No. VIP referenced here is a research reagent only. It is not approved for human or veterinary use, and nothing here should be interpreted as medical advice.
Continue Your Research
To explore related compounds, use our research finder or browse the immunity research category. New to sourcing reference materials? Read the BioRegen research guide and use code RESEARCH10 for 10% off your first order.
Selected research references
- Vasoactive intestinal peptide: a neuropeptide with pleiotropic immune functions. Amino Acids, 2011.
- Vasoactive Intestinal Peptide (VIP) Protects Nile Tilapia against Infection. International Journal of Molecular Sciences, 2022.
Reference metadata sourced via PubMed.
All information on this page is provided strictly for laboratory and educational research purposes. No compound referenced is approved for human or veterinary use, none of it is intended to diagnose, treat, cure, or prevent any disease, and nothing here constitutes medical advice.