KPV

Mechanism (as reported)

A mechanistic review in the provided sources frames KPV (as a fragment of α-MSH) as modulating inflammatory responses, including via NF-κB-related anti-inflammatory actions (described for α-MSH and its fragments such as KPV). Additionally, a study in keratinocytes reported that KPV affected oxidative stress and modulated signaling pathways including MAPK and NF-κB, while another study in melanocytes reported KPV-modified liposomes used to knock down NLRP3 affecting inflammasome activation and pyroptosis-related processes. Mechanistic details are described differently by each source.

Key findings (each cites a source)

• A study investigated transdermal enhancement strategies for KPV across microporated human skin and reported that passive diffusion resulted in permeation below the limit of detection, while microneedle treatment increased permeation and iontophoresis (alone or combined with microneedles) increased permeation further; confocal imaging indicated KPV migration through stratum corneum and along microchannels into lower epidermal tissue. [PMID 28343991]
• A keratinocyte study reported that fine dust (PM10) suppressed HaCaT proliferation and increased IL-1β secretion, and that KPV treatment restored cell viability and reduced IL-1β secretion in PM10-exposed cells. [PMID 40073467]
• The same keratinocyte study reported that KPV inhibited PM10-induced reactive oxygen species (ROS) production, and it described effects on apoptosis- and inflammation-related proteins and modulation of NF-κB-associated signaling components. [PMID 40073467]
• A 3D skin model study reported that KPV attenuated inflammatory cell death induced by PM10. [PMID 40073467]
• A peptide receptor-targeted imaging study reported development of a PepT1-targeted fluorescent probe (DCM-KPV) and described its receptor-targeted interaction with PepT1 via the KPV moiety, enabling discrimination among chronic, acute ulcerative colitis, and normal groups in their reported setup. [PMID 28349696]
• A vascular calcification study reported that self-assembled carrier-free KPV–RAPA spherical nanoparticles inhibited vascular calcification in mice compared with other groups and described mechanistic findings including inhibition of inflammatory responses and activated autophagy. [PMID 39252648]
• A hydrogel study reported that a double-network hydrogel (PMSP) with negative charge adhered specifically to inflamed mucosa and that KPV was captured by PMSP through electrostatic interactions with preserved bioactivity; the study reported improved alleviating effects in a TNBS-induced colitis rat model with PMSP-KPV compared with the non-hydrogel condition described in its grouping, and suggested a possible association with oxidative stress inhibition. [PMID 35245681]
• A melanocyte mechanistic study reported that NLRP3 expression was upregulated in melanocytes in vitiligo contexts described by the authors, and that genetic knockout of NLRP3 alleviated vitiligo progression in their mouse model; the study described impaired NLRP3 autophagic degradation and reported that melanocyte-specific knockdown using KPV-modified deformable liposomes carrying Nlrp3 shRNA alleviated vitiligo development in their reported experiments. [PMID 40935835]
• A neuroimmunomodulatory peptide review described α-MSH and fragments such as KPV as modulating inflammation and stated that α-MSH inhibits NF-κB activation through effects on IκBα, which prevents NF-κB migration to the nucleus. [PMID 11268347]
• An additional provided trial source is not about KPV; it reported erythropoietin administration with therapeutic hypothermia did not reduce death or neurodevelopmental impairment versus placebo and was associated with higher serious adverse events in the specified neonatal hypoxic-ischemic encephalopathy trial. [PMID 35830641]