C2 Ceramide is a short-chain cell-permeable ceramide analogue that inhibits the protein Bcl2 phosphorylation with an IC50 value of 14μmol/L [1]. C2 Ceramide serves as an effective research tool for tumor cell apoptosis studies because C2 Ceramide can activate apoptosis in nearly all cell types[2].
In vitro, C2 Ceramide exhibited the IC50 value of 39µmol/L toward HEp-2 cells for 24h[3]. C2 Ceramide caused the inhibition of HERG potassium channel current in HEK293 cells with an IC50 value of 19.5μmol/L after 10h treatment[4]. C2 Ceramide (25μmol/L, 1h) inhibited the mRNA levels and promoter activities of MMP-1, MMP-3 and MMP-9 in U87MG glioma cells, and suppressed cell migration[5]. The application of C2 Ceramide at a concentration of 50μmol/L for 60 minutes blocked the production of reactive oxygen species triggered by hydrogen peroxide and prevented the resulting cell death in rat primary astrocytes[6].
In vivo, C2 Ceramide treatment at 2.0mg/kg by intraperitoneal injection with Long Evans rat pups for 25 days alleviated the symptoms of hyperglycemia, hyperlipidemia and mild steatohepatitis, reduced the lipid content in the brain, and increased the ceramide levels in the liver, brain and serum[7]. The administration of 120μmol/L C2 Ceramide by gavage for 12 hours resulted in a significant reduction of mRNA and protein expression levels of HNF-1 and GSTA1 in the liver of adult male Kunming mice with acetaminophen-induced acute liver injury[8].
References:
[1] Ruvolo P P, Deng X, Ito T, et al. Ceramide induces Bcl2 dephosphorylation via a mechanism involving mitochondrial PP2A[J]. Journal of Biological Chemistry, 1999, 274(29): 20296-20300.
[2] Wagenknecht B, Roth W, Gulbins E, et al. C2-ceramide signaling in glioma cells: synergistic enhancement of CD95-mediated, caspase-dependent apoptosis[J]. Cell Death & Differentiation, 2001, 8(6): 595-602.
[3] Oğuz O, Manole F, Bayar Muluk N, et al. Effects of ceramide C2 application on human laryngeal carcinoma cells: a cell culture study[J]. Eur Rev Med Pharmacol Sci, 2023, 27(5 Suppl): 109-120.
[4] Bai Y, Wang J, Shan H, et al. Sphingolipid metabolite ceramide causes metabolic perturbation contributing to HERG K+ channel dysfunction[J]. Cellular Physiology and Biochemistry, 2007, 20(5): 429-440.
[5] Jung J S, Ahn Y H, Moon B I, et al. Exogenous C2 ceramide suppresses matrix metalloproteinase gene expression by inhibiting ROS production and MAPK signaling pathways in PMA-stimulated human astroglioma cells[J]. International Journal of Molecular Sciences, 2016, 17(4): 477.
[6] Jung J S, Choi M J, Ko H M, et al. Short-chain C2 ceramide induces heme oxygenase-1 expression by upregulating AMPK and MAPK signaling pathways in rat primary astrocytes[J]. Neurochemistry international, 2016, 94: 39-47.
[7] de la Monte S M, Tong M, Nguyen V A, et al. Ceramide-mediated insulin resistance and impairment of cognitive-motor functions[J]. Journal of Alzheimer’s Disease, 2010, 21(3): 967-984.
[8] Ma X, Chang Y, Zhang Y, et al. Effects of C2-ceramide and oltipraz on hepatocyte nuclear factor-1 and glutathione S-transferase A1 in acetaminophen-mediated acute mice liver injury[J]. Frontiers in Pharmacology, 2018, 9: 1009.
















