KPV Research FAQ

KPV comes up often in peptide research discussions because it sits at an unusual intersection — a fragment small enough to be a nutrient-transporter substrate, studied for effects that don't seem to run through the receptor its parent molecule uses. Below are the questions that come up most, answered the way the published literature actually frames them.

What is KPV?

KPV is a synthetic tripeptide made of the amino acids lysine, proline, and valine. It corresponds to the C-terminal three residues (positions 11–13) of alpha-melanocyte-stimulating hormone (α-MSH), a 13-amino-acid peptide studied for anti-inflammatory and antimicrobial signaling [4].

How does KPV get into cells?

Published research identified PepT1, a di/tripeptide transporter expressed in the small intestine and induced in the colon during inflammatory bowel disease, as KPV's route into intestinal epithelial and immune cells. Once inside, nanomolar concentrations of KPV were reported to inhibit NF-κB and MAP kinase inflammatory signaling [1].

Does KPV work through the same receptors as alpha-MSH?

Research directly comparing the two suggests not. KPV's anti-inflammatory effect in a mouse peritonitis model was not blocked by a melanocortin-3/4 receptor antagonist, and KPV did not raise cAMP in macrophages the way full alpha-MSH did — leading researchers to conclude its mechanism is likely receptor-independent, distinct from classical melanocortin signaling [3].

What animal models has KPV been studied in?

Published studies have evaluated KPV in murine models of DSS-induced colitis (reporting earlier weight recovery and reduced inflammatory infiltrates) [2], crystal-induced and IL-1β-induced peritonitis (reporting reduced immune-cell accumulation) [3], and in-vitro antimicrobial assays against Staphylococcus aureus and Candida albicans [4].

Is there human clinical trial data for KPV?

No completed human clinical trials specifically evaluating KPV were identified in the published record as of this writing. The evidence base is cell-based and animal-model research. KPV has not been approved by the FDA or any regulator as a drug for any use.

Has KPV been studied for antimicrobial effects?

Yes. Research on alpha-MSH and its KPV fragment reported inhibition of S. aureus colony formation and reduced viability of the yeast C. albicans across a range of concentrations, including physiological levels, without impairing (and appearing to enhance) pathogen killing by human neutrophils [4].

How is research-grade KPV supplied?

Typically as a lyophilized (freeze-dried) powder for reconstitution in a laboratory setting, accompanied by a Certificate of Analysis confirming HPLC-verified purity.

Can I use KPV?

Materials described here are for laboratory research only and are not for human consumption. Nothing here is medical advice.