α-Cyano-4-hydroxycinnamic acid (CHC) is a non-competitive inhibitor of the mitochondrial pyruvate transporter with a Ki of 6.3μM[1]. α-Cyano-4-hydroxycinnamic acid inhibits both the monophenolase activity and diphenolase activity of mushroom tyrosinase, with IC50 values of 48µM and 2.17mM, respectively[2]. α-Cyano-4-hydroxycinnamic acid regulates isolated mouse muscle fatigue and recovery by blocking the transport of lactate and hydrogen ions[3]. α-Cyano-4-hydroxycinnamic acid has been extensively used for protein and peptide analysis as a matrix for ultraviolet matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS)[4].
In vitro, α-Cyano-4-hydroxycinnamic acid treatment for 72 hours significantly inhibited the viability of HeLa and HCT116 cells, with IC50 values of 2.41mM and 1.65mM, respectively[5]. Treatment with 400µM α-Cyano-4-hydroxycinnamic acid for 24 hours altered the activities of protein kinase C (PKC)-δ and PKC-ζ, and reduced the occurrence of malformations in rat embryos cultured in high-glucose conditions[6].
In vivo, a single intraperitoneal injection of α-Cyano-4-hydroxycinnamic acid (200mg/kg) stimulated food intake in rats within 4 hours, without affecting blood glucose levels[7].
References:
[1] Halestrap A P. The mitochondrial pyruvate carrier. Kinetics and specificity for substrates and inhibitors[J]. Biochemical Journal, 1975, 148(1): 85-96.
[2] Qiu L, Chen Q H, Zhuang J X, et al. Inhibitory effects of α-cyano-4-hydroxycinnamic acid on the activity of mushroom tyrosinase[J]. Food Chemistry, 2009, 112(3): 609-613.
[3] Clarke P D, Clift D L, Dooldeniya M, et al. Effects of α-cyano-4-hydroxycinnamic acid on fatigue and recovery of isolated mouse muscle[J]. Journal of Muscle Research & Cell Motility, 1995, 16(6): 611-617.
[4] Mojica E R E, Vedad J, Desamero R Z B. Vibrational analysis of α-cyanohydroxycinnamic acid[J]. Journal of molecular structure, 2015, 1094: 203-209.
[5] Ji H, Tan Y, Gan N, et al. Synthesis and anticancer activity of new coumarin-3-carboxylic acid derivatives as potential lactate transport inhibitors[J]. Bioorganic & Medicinal Chemistry, 2021, 29: 115870.
[6] Gäreskog M, Wentzel P. N-Acetylcysteine and α-cyano-4-hydroxycinnamic acid alter protein kinase C (PKC)-δ and PKC-ζ and diminish dysmorphogenesis in rat embryos cultured with high glucose in vitro[J]. Journal of endocrinology, 2007, 192(1): 207-214.
[7] Del Prete E, Lutz T A, Scharrer E. Inhibition of glucose oxidation by α-cyano-4-hydroxycinnamic acid stimulates feeding in rats[J]. Physiology & behavior, 2004, 80(4): 489-498.
















