Acetyl tetrapeptide-5
is used in cosmetic eye formulations to decrease puffiness, eye bags, and dark circles by reducing edema and protecting proteins such as SOD from glycation
Alanine
Ala / A · hydrophobic residue · neutral charge
AOD-9604
is studied as an anti-obesity peptide that can reduce weight gain and increase fat oxidation in obese animal models with generally neutral effects on IGF-1 and glucose metabolism in early human trials
Arginine
Arg / R · basic residue · positive charge
Argireline
is a topical cosmetic peptide reported to decrease dynamic wrinkles by partially mimicking the mechanism of botulinum toxin in a non-invasive manner
Asparagine
Asn / N · polar residue · neutral charge
Aspartic acid
Asp / D · acidic residue · negative charge
BPC-157
is investigated for accelerating healing of gastrointestinal mucosa, tendons, ligaments, bone, and nervous tissue in preclinical models, with anti-inflammatory and pro-angiogenic effects
Comparison
While LL-37 acts as a broad-spectrum antimicrobial and immunomodulatory peptide involved in host defense and wound repair, but can also promote inflammation and cancer cell proliferation in some contexts5215, PT-141 is FDA-approved for treatment of hypoactive sexual desire disorder in premenopausal women and is studied for sexual dysfunction in other populations, increasing sexual desire via CNS melanocortin pathways42101.
While LL-37 works as a cationic amphipathic 37-amino-acid cathelicidin peptide generated from hCAP18 that disrupts microbial membranes and modulates innate immunity, including chemotaxis, cytokine induction, and NET formation521586, PT-141 is the synthetic melanocortin receptor agonist bremelanotide, an analog of α-MSH that activates central MC3R and MC4R to modulate neuronal circuits governing sexual desire and arousal3242101.
LL-37
CAMP
PT-141
POMC
The clearest overlap between LL-37 and PT-141 is that both converge around Signaling modulator and GPCR receptor. Their typical research and application settings separate fairly clearly: LL-37 is more often discussed in the realm of Immunology and inflammation and Gastroenterology, whereas PT-141 is more often associated with the realm of Reproductive health. Mechanistically, both point toward Signaling modulator and converge on GPCR receptor, although the downstream emphasis is not identical. LL-37 has a more natural endogenous origin, while PT-141 is closer to synthetic analog background and their development context also differs, with LL-37 in Preclinical development while PT-141 is approved. LL-37 takes the form of a linear peptide, whereas PT-141 is closer to a cyclic peptide, PT-141 incorporates acetylation features that are not part of LL-37; while their sequence patterns also diverge, with LL-37 showing cationic amphipathic and alpha-helical domain features and PT-141 showing protein-mimetic sequence features.
No related articles are linked to these peptides yet.