The Marine Natural Product Manzamine A Inhibits Cervical Cancer by Targeting the SIX1 Protein.

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2020
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Abstract
Natural products remain an important source of drug leads covering unique chemical space and providing significant therapeutic value for the control of cancer and infectious diseases resistant to current drugs. Here, we determined the antiproliferative activity of a natural product manzamine A () from an Indo-Pacific sponge following various in vitro cellular assays targeting cervical cancer (C33A, HeLa, SiHa, and CaSki). Our data demonstrated the antiproliferative effects of at relatively low and non-cytotoxic concentrations (up to 4 μM). Mechanistic investigations confirmed that blocked cell cycle progression in SiHa and CaSki cells at G1/S phase and regulated cell cycle-related genes, including restoration of p21 and p53 expression. In apoptotic assays, HeLa cells showed the highest sensitivity to as compared to other cell types (C33A, SiHa, and CaSki). Interestingly, decreased the levels of the oncoprotein SIX1, which is associated with oncogenesis in cervical cancer. To further investigate the structure-activity relationship among manzamine A () class with potential antiproliferative activity, molecular networking facilitated the efficient identification, dereplication, and assignment of structures from the manzamine class and revealed the significant potential in the design of optimized molecules for the treatment of cervical cancer. These data suggest that this sponge-derived natural product class warrants further attention regarding the design and development of novel manzamine analogues, which may be efficacious for preventive and therapeutic treatment of cancer. Additionally, this study reveals the significance of protecting fragile marine ecosystems from climate change-induced loss of species diversity.
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Authors Karan, Dev;Dubey, Seema;Pirisi, Lucia;Nagel, Alexis;Pina, Ivett;Choo, Yeun-Mun;Hamann, Mark T;
Journal Journal of natural products
Year 2020
DOI 10.1021/acs.jnatprod.9b00577
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