SK1-I hydrochloride (BML-258 hydrochloride), an analog of sphingosine, is an isozyme-specific competitive SPHK1 inhibitor with a Ki value of 10 µM. SK1-I hydrochloride shows no activity at SPHK1 PKCα, PKCδ, PKA, AKT1, ERK1, EGFR, CDK2, IKKβ or CamK2β. SK1-I hydrochloride enhances autophagy and has antitumor activity.
体外研究
SK1-I hydrochloride (0-10 μM; 24 hours) attenuates cancer cell growth and survival in a TP53-dependent manner in HCT116 cells and HCT116 cells bearing TP53 null cancer.
SK1-I hydrochloride (0-20 μM; 12 hours) induces more CASP3 cleavage in HCT116 cells, compared to HCT116 cells lacking TP53, leading to a hallmark of apoptosis.
Cell Viability Assay
Cell Line:
HCT116 cells and HCT116 cells bearing TP53 null cancer
Concentration:
0 µM, 2.5 µM, 5 µM, 7.5 µM, 10 µM
Incubation Time:
24 hours
Result:
Decreased cancer cell growth and survival.
Western Blot Analysis
Cell Line:
HCT116 cells and HCT116 cells bearing TP53 null cancer
Concentration:
0 µM, 5 µM, 10 µM, 20 µM
Incubation Time:
12 hours
Result:
Induced more CASP3 cleavage in HCT116 cells, compared to HCT116 cells lacking TP53.
体内研究
Pre-treatment with SK1-I hydrochloride (BML-258 hydrochloride; intraperitoneal (i.p.) injection; once; 24 hours prior to baseline mean arterial blood pressure (MAP) measurement; 75 mg/kg) before anandamide (i.v. injection; two doses; 1 and 10 mg/kg) significantly decreases the hypotensive response.