title: Cytotoxic Impact of Costunolide Isolated from Costus speciosus on Breast Cancer via Differential Regulation of Cell Cycle-An In-vitro and In-silico Approach.
abstract: Costunolide, a sesquiterpene lactone, is a biologically active molecule found in most of the medicinally valuable plants. The present study aims to evaluate the anticancer property of costunolide isolated from Costus speciosus against breast cancer cell lines (MCF-7 and MDA-MB-231). Costunolide effectively reduced the viability of both MCF-7 and MDA-MB-231 cell lines at an IC50 value of 40 μM. Flow cytometric analysis revealed costunolide mediated cell cycle arrest at G2/M phase in both the cell types. Western blotting results confirmed the alterations in the expression of cell cycle regulators (cyclin D1, D3, CDK-4, CDK-6, p18 INK4c, p21 CIP1/Waf-1 and p27 KIP1) and apoptosis inducers (caspase-3 and caspase-9) upon costunolide treatment in comparison with their expressions in normal breast cell line (MCF-10A). Costunolide mediated downregulation of positive cell cycle regulators and upregulation of negative cell cycle regulators were related to the induction of apoptosis in cancer cells. The above results were validated with in-silico results that predicted stable interactions between costunolide and cancer targets. Thus costunolide effectively induced breast cancer cell apoptosis targeting cell cycle regulation, and the compound can be used as an effective herbal therapeutic molecule to treat breast cancer with further explorations.
authors.affiliation: Holy Cross College-PG and Research Department of Biotechnology and Bioinformatics, Tiruchirappalli, Tamil Nadu, India.
authors.forename: Anita
authors.initials: A
authors.lastname: Roy
authors.affiliation: Holy Cross College-PG and Research Department of Biotechnology and Bioinformatics, Tiruchirappalli, Tamil Nadu, India.
authors.forename: Rajalakshmi
authors.initials: R
authors.lastname: Manikkam
mesh_terms: D017209:Apoptosis / Q000187:drug effects; D001940:Breast; D001943:Breast Neoplasms / Q000188:drug therapy* / Q000378:metabolism; D053148:Caspase 3 / Q000378:metabolism; D053453:Caspase 9; D002453:Cell Cycle / Q000187:drug effects; D059447:Cell Cycle Checkpoints / Q000187:drug effects; D002455:Cell Division; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D003198:Computer Simulation; D029770:Costus; D005260:Female; D016195:G2 Phase / Q000187:drug effects; D006801:Humans; D019001:Nitric Oxide Synthase / Q000037:antagonists & inhibitors; D012717:Sesquiterpenes / Q000494:pharmacology*; D007783:Lactones
chemical_list: D053148:Caspase 3; D053453:Caspase 9; D019001:Nitric Oxide Synthase; D012717:Sesquiterpenes; C002602:costunolide; D007783:Lactones
keywords: Phytotherapy; anticancer; apoptosis; cell cycle; docking