- Synthesis of C5-tethered indolyl-3-glyoxylamide derivatives as tubulin polymerization inhibitors
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A series of C5-tethered Indolyl-3-glyoxylamide derivatives were synthesized and evaluated for their in?vitro cytotoxic activity against DU145 (prostate), PC-3 (prostate), A549 (lung) and HCT-15 (colon) cancer cell lines by employing the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Among all the synthesized compounds, compound 7f displayed cytotoxicity of IC50?=?140?nM towards DU145 cancer cell line. The treatment of DU145?cells with 7f led to inhibition of cell migration ability. Futher, the detailed studies such as acridine orange/ethidium Bromide (AO/EB), DAPI, annexin V-FITC/propidium iodide staining assay suggested that the compound 7f induced apoptosis in DU145?cells. The influence of the cytotoxic compound 7f on the cell cycle distribution was assessed on the DU145?cell line, exhibiting a cell cycle arrest at the G2/M phase (hallmark of tubulin polymerization) and next inhibited tubulin polymerization with IC500.40?μM. Furthermore, the treatment with compound 7f caused collapse of mitochondrial membrane potential and elevated intracellular superoxide ROS levels in DU145?cells. Western blotting was performed to examine the levels of apoptotic proteins (Bcl-2 and Bax); the study confirmed that compound 7f induced apoptosis through apoptosis-related protein expression. Thus, these studies provided a new molecular scaffold for the further development of anticancer agents that target tubulin.
- Guggilapu, Sravanthi Devi,Lalita, Guntuku,Reddy, T. Srinivasa,Prajapti, Santosh Kumar,Nagarsenkar, Atulya,Ramu, Shymala,Brahma, Uma Rani,Lakshmi, Uppa Jaya,Vegi, Ganga Modi Naidu,Bhargava, Suresh K.,Babu, Bathini Nagendra
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- Synthesis and biological evaluation of oxindole linked indolyl-pyrimidine derivatives as potential cytotoxic agents
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In our endeavor towards the development of effective cytotoxic agents, a series of oxindole linked indolyl-pyrimidine derivatives were synthesized and characterized by IR, 1H NMR, 13C NMR and Mass spectral analysis. All the newly synthesized target compounds were assessed against PA-1 (ovarian), U-87MG (glioblastoma), LnCaP (prostate), and MCF-7 (Breast) cancer cell lines for their cytotoxic potential, with majority of them showing inhibitory activity at low micro-molar concentrations. Significantly, compound 8e was found to be most potent amongst all the tested compounds with an IC50 value of (2.43 ± 0.29 μM) on PA-1 cells. The influence of the most active cytotoxic compound 8e on the cell cycle distribution was assessed on the PA-1 cell line, exhibiting a cell cycle arrest at the G2/M phase. Moreover, acridine orange/ethidium bromide staining and annexin V binding assay confirmed that compound 8e can induce cell apoptosis in PA-1 cells. These preliminary results persuade further investigation on the synthesized compounds aiming to the development of potential cytotoxic agents.
- Prajapti, Santosh Kumar,Nagarsenkar, Atulya,Guggilapu, Sravanthi Devi,Gupta, Keshav Kumar,Allakonda, Lingesh,Jeengar, Manish Kumar,Naidu,Babu, Bathini Nagendra
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supporting information
p. 3024 - 3028
(2016/06/13)
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