Targeting HIF-1α by newly synthesized Indolephenoxyacetamide (IPA) analogs to induce anti-angiogenesis-mediated solid tumor suppression
作者:Fares Hezam Al-Ostoot、Ankith Sherapura、Vigneshwaran V、Giridhara Basappa、Vivek H.K.、Prabhakar B.T、Shaukath Ara Khanum
DOI:10.1007/s43440-021-00266-8
日期:2021.10
Hypoxic microenvironment is a common feature of solid tumors, which leads to the promotion of cancer. The transcription factor, HIF-1α, expressed under hypoxic conditions stimulates tumor angiogenesis, favoring HIF-1α as a promising anticancer agent. On the other hand, synthetic Indolephenoxyacetamide derivatives are known for their pharmacological potentiality. With this background here, we have synthesized, characterized, and validated the new IPA (8a–n) analogs for anti-tumor activity. The new series of IPA (8a–n) were synthesized through a multi-step reaction sequence and characterized based on the different spectroscopic analysis FT-IR, 1H, 13C NMR, mass spectra, and elemental analyses. Cell-based screening of IPA (8a–n) was assessed by MTT assay. Anti-angiogenic efficacy of IPA (8k) validated through CAM, Rat corneal, tube formation and migration assay. The underlying molecular mechanism is validated through zymogram and IB studies. The in vivo anti-tumor activity was measured in the DLA solid tumor model. Screening for anti-proliferative studies inferred, IPA (8k) is a lead molecule with an IC50 value of ˜5 μM. Anti-angiogenic assays revealed the angiopreventive activity through inhibition of HIF-1α and modulation downstream regulatory genes, VEGF, MMPs, and P53. The results are confirmative in an in vivo solid tumor model. The IPA (8k) is a potent anti-proliferative molecule with anti-angiogenic activity and specifically targets HIF1α, thereby modulates its downstream regulatory genes both in vitro and in vivo. The study provides scope for new target-specific drug development against HIF-1α for the treatment of solid tumors.
低氧微环境是实体瘤的常见特征,它促进了癌症的发展。在低氧条件下表达的转录因子HIF-1α刺激肿瘤血管生成,使HIF-1α成为一个有前景的抗癌剂。另一方面,合成吲哚酚氧乙酰胺衍生物以其药理潜力而闻名。基于此背景,我们合成了新型IPA(8a-n)类似物,并验证了其抗肿瘤活性。新系列的IPA(8a-n)通过多步骤反应序列合成,并基于不同的光谱分析FT-IR、1H、13C NMR、质谱和元素分析进行表征。通过MTT assay评估了IPA(8a-n)的基于细胞的筛选。通过CAM、大鼠角膜、管形成和迁移实验验证了IPA(8k)的抗血管生成效果。通过酶谱和IB研究验证了其分子机制。在DLA实体瘤模型中测量了体内抗肿瘤活性。进行抗增殖研究筛选,结果显示IPA(8k)是一个领先分子,其IC50值约为5μM。抗血管生成实验揭示了通过抑制HIF-1α和调节下游调节基因VEGF、MMPs和P53来预防血管生成的活性。在体内实体瘤模型中得到了确认的结果。IPA(8k)是一个强效的抗增殖分子,具有抗血管生成活性,并特异性地靶向HIF1α,从而调节其下游调节基因在体外和体内。该研究为针对HIF-1α的针对特定靶点的新药开发提供了范围,用于治疗实体瘤。