CPTH2 是有效的组蛋白乙酰基转移酶 (HAT) 抑制剂。CPTH2 选择性地抑制 Gcn5 对组蛋白 H3 的乙酰化。CPTH2 通过抑制乙酰转移酶 p300 (KAT3B) 诱导凋亡 (apoptosis) 并降低透明细胞肾癌 (ccRCC) 细胞系的侵袭性。

CPTH2 is a potent histone acetyltransferase (HAT) inhibitor. CPTH2 selectively inhibits the acetylation of histone H3 by Gcn5. CPTH2 induces apoptosis and decreases the invasiveness of a clear cell renal carcinoma (ccRCC) cell line through the inhibition of acetyltransferase p300 (KAT3B).

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GCN5

CPTH2 (100 μM; 12, 24, 48 hours) causes a decrease in cell proliferation after as early as 12 h with a further significant reduction after 48 h stimulation.
CPTH2 (100 μM; 12 or 48 hours) causes a comparable drop of the activity in both cell lines.
CPTH2 (100 μM; 48 hours) produces a drastic increase in apoptotic/dead cell population after 48 h.
CPTH2 (100 μM; 12, 24, 48 hours) shows a reduced acetylation of both global AcH3 histone and H3AcK18.
CPTH2 (100 μM; 24, 48 hours) is capable to counteract invasion and migration of ccRCC-786-O cells in culture.
CPTH2 (0.2, 0.5, 1 mM) inhibits the growth of a GCN5 deleted strain and a single catalytic mutant E173H.
CPTH2 (0.6, 0.8 mM; for 24 hours) inhibits histone H3 acetylation in yeast cell cultures.
CPTH2 inhibits the Gcn5p dependent functional network.

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[1]. Cocco E, et al. KAT3B-p300 and H3AcK18/H3AcK14 levels are prognostic markers for kidney ccRCC tumoraggressiveness and target of KAT inhibitor CPTH2. Clin Epigenetics. 2018 Apr 4;10:44.
[2]. Chimenti F, et al. A novel histone acetyltransferase inhibitor modulating Gcn5 network: cyclopentylidene-[4-(4-chlorophenyl)thiazol-2-yl)hydrazone. J Med Chem. 2009 Jan 22;52(2):530-6.

In Vitro: DMSO : 16.67 mg/mL (57.13 mM; ultrasonic and warming and heat to 60°C)Ethanol : 1 mg/mL (3.43 mM; Need ultrasonic)H₂O : < 0.1 mg/mL (ultrasonic) (insoluble)