H-Gly-Pro-Hyp-OH is an oral collagen tripeptide with high enzyme stability and intestinal permeability [1]. H-Gly-Pro-Hyp-OH is a moderately competitive inhibitor of dipeptidylpeptidase-IV with a Ki value of 4.5mM[2]. H-Gly-Pro-Hyp-OH has unique specificity for platelet Gp VI and mediates the activation of platelets by collagen [3]. H-Gly-Pro-Hyp-OH treatment inhibits the excessive growth of S. mutans and promotes the dominant growth of S. oralis Dominance [4]. H-Gly-Pro-Hyp-OH has been widely used to improve skin conditions and regulate the central nervous system [5].
In vivo, H-Gly-Pro-Hyp-OH treatment via oral administration at a dose of 31.36mg/kg/day for 6 weeks increased the content of elastin in the skin of aged mice exposed to light, and alleviated the damage to the skin structure on the back caused by chronic ultraviolet radiation[6].
References:
[1] Sontakke S B, Jung J, Piao Z, et al. Orally available collagen tripeptide: enzymatic stability, intestinal permeability, and absorption of Gly-Pro-Hyp and Pro-Hyp[J]. Journal of agricultural and food chemistry, 2016, 64(38): 7127-7133.
[2] Hatanaka T, Kawakami K, Uraji M. Inhibitory effect of collagen-derived tripeptides on dipeptidylpeptidase-IV activity[J]. Journal of enzyme inhibition and medicinal chemistry, 2014, 29(6): 823-828.
[3] Knight C G, Morton L F, Onley D J, et al. Collagen–platelet interaction: Gly-Pro-Hyp is uniquely specific for platelet Gp VI and mediates platelet activation by collagen[J]. Cardiovascular research, 1999, 41(2): 450-457.
[4] Jung H Y, Cai J N, Yoo S C, et al. Collagen peptide in a combinatorial treatment with Lactobacillus rhamnosus inhibits the cariogenic properties of Streptococcus mutans: An in vitro study[J]. International Journal of Molecular Sciences, 2022, 23(3): 1860.
[5] Hatanaka T, Kawakami K, Uraji M. Inhibitory effect of collagen-derived tripeptides on dipeptidylpeptidase-IV activity[J]. Journal of enzyme inhibition and medicinal chemistry, 2014, 29(6): 823-828.
[6] Yang D, Liu Q, Xu Q, et al. Effects of collagen hydrolysates on UV-induced photoaging mice: Gly-Pro-Hyp as a potent anti-photoaging peptide[J]. Food & function, 2024, 15(6): 3008-3022.
















