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 Kisspeptin is a key regulator of the hypothalamic–pituitary–gonadal axis, controlling puberty and fertility; kisspeptin-10 also inhibits trophoblast invasion and tumor metastasis in experimental models339199, MOTS-c improves insulin sensitivity, enhances glycolysis, reduces oxidative stress, and shows protective effects in models of metabolic syndrome, aging, and ischemia-reperfusion injury8135146.
While Kisspeptin works as a family of peptides (eg, kisspeptin-10, -13, -14, -54) derived from the KISS1 precursor that activate G-protein–coupled receptor KISS1R (GPR54), triggering GnRH release and regulating pubertal onset and reproductive axis activity339199, MOTS-c is a 16-amino-acid mitochondrial-derived peptide that translocates to the nucleus under metabolic stress and regulates glucose and lipid metabolism largely via activation of AMPK and modulation of mTOR and folate-cycle–linked pathways854140146.
Kisspeptin
KISS1
MOTS-c
MT-RNR1
Kisspeptin and MOTS-c are noticeably different, with limited direct overlap in their usual biological context. Their typical research and application settings separate fairly clearly: Kisspeptin is more often discussed in the realm of Reproductive health, whereas MOTS-c is more often associated with the realm of Metabolic and endocrine and Aging and longevity. They also influence different molecular systems, with Kisspeptin tracking more closely to GPCR receptor while MOTS-c centers more on Mitochondrial membrane. Kisspeptin has a more natural endogenous origin, while MOTS-c is closer to mitochondrial-encoded background and both are still best understood as being in Preclinical development. Kisspeptin incorporates amidation features that are not part of MOTS-c, while their sequence patterns also diverge, with Kisspeptin showing alpha-helical domain features and MOTS-c showing hydrophobic domain features.