Mayer, Mascha and Berger, Alexander and Leischner, Christian and Renner, Olga and Burkard, Markus and Boecker, Alexander and Noor, Seema and Weiland, Timo and Weiss, Thomas S. and Busch, Christian and Lauer, Ulrich M. and Bischoff, Stephan C. and Venturelli, Sascha (2022) Preclinical Efficacy and Toxicity Analysis of the Pan-Histone Deacetylase Inhibitor Gossypol for the Therapy of Colorectal Cancer or Hepatocellular Carcinoma. PHARMACEUTICALS, 15 (4): 438. ISSN , 1424-8247
Full text not available from this repository. (Request a copy)Abstract
Gossypol, a sesquiterpenoid found in cotton seeds, exerts anticancer effects on several tumor entities due to inhibition of DNA synthesis and other mechanisms. In clinical oncology, histone deacetylase inhibitors (HDACi) are applied as anticancer compounds. In this study, we examined whether gossypol harbors HDAC inhibiting activity. In vitro analyses showed that gossypol inhibited class I, II, and IV HDAC, displaying the capability to laterally interact with the respective catalytic center and is, therefore, classified as a pan-HDAC inhibitor. Next, we studied the effects of gossypol on human-derived hepatoma (HepG2) and colon carcinoma (HCT-116) cell lines and found that gossypol induced hyperacetylation of histone protein H3 and/or tubulin within 6 h. Furthermore, incubation with different concentrations of gossypol (5-50 mu M) over a time period of 96 h led to a prominent reduction in cellular viability and proliferation of hepatoma (HepG2, Hep3B) and colon carcinoma (HCT-116, HT-29) cells. In-depth analysis of underlying mechanisms showed that gossypol induced apoptosis via caspase activation. For pre-clinical evaluation, toxicity analyses showed toxic effects of gossypol in vitro toward non-malignant primary hepatocytes (PHH), the colon-derived fibroblast cell line CCD-18Co, and the intestinal epithelial cell line CCD 841 CoN at concentrations of >= 5 mu M, and embryotoxicity in chicken embryos at >= 2.5 mu M. In conclusion, the pronounced inhibitory capacity of gossypol on cancer cells was characterized, and pan-HDACi activity was detected in silico, in vitro, by inhibiting individual HDAC isoenzymes, and on protein level by determining histone acetylation. However, for clinical application, further chemical optimization is required to decrease cellular toxicity.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CELL-DEATH; COLON-CARCINOMA; GENE-EXPRESSION; HDAC INHIBITORS; BREAST-CANCER; ORAL GOSSYPOL; CHICK-EMBRYO; IN-VITRO; APOPTOSIS; P53; gossypol; histone deacetylase; epigenetics; AT-101; colon cancer; liver cancer |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Kinder- und Jugendmedizin |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 29 Feb 2024 16:02 |
| Last Modified: | 29 Feb 2024 16:02 |
| URI: | https://pred.uni-regensburg.de/id/eprint/58463 |
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