A series of lH-pyrazolo[3,4-b]quinolin-3-amine derivatives were synthesized and evaluated for anticancer efficacy in a panel of ten cancer cell lines, including breast (MDAMB-231 and MCF-7), colon (HCT-116, HCT-15, HT-29 and LOVO), prostate (DU-145 and PC3), brain (LN-229), ovarian (A2780), and human embryonic kidney (HEK293) cells, a non-cancerous cell line. Among the eight derivatives screened, compound QTZ05 had the most potent and selective antitumor efficacy in the four colon cancer cell lines, with IC₅₀ values ranging from 2.3 to 10.2 µM. Furthermore, QTZ05 inhibited colony formation in HCT-116 cells in a concentration-dependent manner. Cell cycle analysis data indicated that QTZ05 caused an arrest in the sub G1 cell cycle in HCT-116 cells. QTZ05 induced apoptosis in HCT-116 cells in a concentration-dependent manner that was characterized by chromatin condensation and increase in the fluorescence of fluorochrome-conjugated Annexin V. The findings from our study suggest that QTZ05 may be a valuable prototype for the development of chemotherapeutics targeting apoptotic pathways in colorectal cancer cells.

合成了一系列1 H-吡唑并[3,4- b ]喹啉-3-胺衍生物，并评估了十种癌细胞系（包括乳腺癌（MDAMB-231和MCF-7），结肠（ HCT-116，HCT-15，HT-29和LOVO），前列腺（DU-145和PC3），脑（LN-229），卵巢（A2780）和人胚肾（HEK293）细胞（非癌细胞）线。在筛选的八种衍生物中，化合物QTZ05在四种结肠癌细胞系中具有最强效和选择性的抗肿瘤功效，IC ₅₀值范围为2.3至10.2 µM。此外，QTZ05以浓度依赖的方式抑制HCT-116细胞中的集落形成。细胞周期分析数据表明，QTZ05导致HCT-116细胞亚G1细胞周期停滞。QTZ05以浓度依赖的方式诱导HCT-116细胞凋亡，其特征在于染色质浓缩和荧光素偶联膜联蛋白V的荧光增强。我们的研究结果表明QTZ05可能是化学疗法发展的有价值的原型靶向大肠癌细胞的凋亡途径。