Inhibition of PCAF Histone Acetyltransferase, Cytotoxicity and Cell Permeability of 2-Acylamino-1-(3- or 4-Carboxy-phenyl)benzamides
作者:Woong Park、Eunsook Ma
DOI:10.3390/molecules171113116
日期:——
Small molecule HAT inhibitors are useful tools to unravel the role of histone acetyltransferases (HATs) in the cell and they also have relevance in oncology. We synthesized a series of 2-acylamino-1-(3- or 4-carboxyphenyl)benzamides 8–19 bearing C6, C8, C10, C12, C14, and C16 acyl chains at the 2-amino position of 2-aminobenzoic acid. Enzyme inhibition of these compounds was investigated using in vitro PCAF HAT assays. The inhibitory activities of compounds 8–10, 16, and 19 were similar to that of anacardic acid, and 17 was found to be more active than anacardic acid at 100 μM. Compounds 11–15 showed the low inhibitory activity on PCAF HAT. The cytotoxicity of the synthesized compounds was evaluated by SRB (sulforhodamine B) assay against seven human cancer cell lines: HT-29 (colon), HCT-116 (colon), MDA-231 (breast), A549 (lung), Hep3B (hepatoma), HeLa (cervical) and Caki (kidney) and one normal cell line (HSF). Compound 17 was more active than anacardic acid against human colon cancer (HCT 116, IC50: 29.17 μM), human lung cancer (A549, IC50: 32.09 μM) cell lines. 18 was more active than anacardic acid against human colon cancer (HT-29, IC50: 35.49 μM and HCT 116, IC50: 27.56 μM), human lung cancer (A549, IC50: 30.69 μM), and human cervical cancer (HeLa, IC50: 34.41 μM) cell lines. The apparent permeability coefficient (Papp, cm/s) values of two compounds (16 and 17) were evaluated as 68.21 and 71.48 × 10−6 cm/s by Caco-2 cell permeability assay.
小分子组蛋白乙酰转移酶(HAT)抑制剂是揭示组蛋白乙酰转移酶在细胞中作用的有用工具,并且在肿瘤学中也具有相关性。我们合成了一系列2-酰氨基-1-(3或4-羧基苯基)苯甲酰胺8–19,这些化合物在2-氨基苯甲酸的2-氨基位置上具有C6、C8、C10、C12、C14和C16的酰基链。利用体外PCAF HAT测定法研究了这些化合物的酶抑制作用。化合物8–10、16和19的抑制活性与腰果酸相似,而17在100 μM浓度下被发现比腰果酸活性更强。化合物11–15在PCAF HAT上显示出较低的抑制活性。通过SRB(硫罗丹明B)测定法评估了合成化合物对七种人类癌细胞系的细胞毒性:HT-29(结肠癌)、HCT-116(结肠癌)、MDA-231(乳腺癌)、A549(肺癌)、Hep3B(肝癌)、HeLa(宫颈癌)和Caki(肾癌)以及一种正常细胞系(HSF)。化合物17对人类结肠癌(HCT 116,IC50: 29.17 μM)、人类肺癌(A549,IC50: 32.09 μM)细胞系的活性超过腰果酸。化合物18在对人类结肠癌(HT-29,IC50: 35.49 μM和HCT 116,IC50: 27.56 μM)、人类肺癌(A549,IC50: 30.69 μM)和人类宫颈癌(HeLa,IC50: 34.41 μM)细胞系时也比腰果酸更活跃。两个化合物(16和17)的表观透过系数(Papp,cm/s)通过Caco-2细胞透过性测定法评估为68.21和71.48 × 10−6 cm/s。