Primary ovarian cancer cell inhibition by human Wharton's Jelly stem cells (hWJSCs): Mapping probable mechanisms and targets using systems oncology


Gauthaman Kalamegam1*, Peter Natesan Pushparaj1, Fazal Khan2, Khalid Hussein Wali Sait3, Nisreen Anfinan3, Mohammed Al-Qahtani1 


1 Center of Excellence in Genomic Medicine Research (CEGMR), King Abdulaziz University, Jeddah, Saudi Arabia; 2Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia; 3Department of Obstetrics and Gynaecology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia

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Received November 20, 2015; Revised December 07, 2015; Accepted December 07, 2015; Published December 31, 2015



Ovarian cancer is one of the most lethal gynaecological cancers. Its subtle onset and absence of symptoms in early stages are associated with poor prognosis and high mortality. Identification of early biomarkers would aid in ovarian cancer control. Mesenchmal stem cells (MSCs) and/or their secretory products are identified to have cancer inhibitory properties. Therefore, it is of interest to study the anticancer properties of human Wharton's jelly stem cells conditioned medium (hWJSCs-CM) on primary ovarian carcinoma cells in vitro Primary cultures of epithelial ovarian carcinoma cells (EOCs) and  hWJSCs were used in this study.  EOCs were exposed to hWJSC-CM (100%) for 24h-72h and changes in mophology and cell proliferation were monitored. Treatment with hWJSC-CM showed altered morphological changes that resulted in death of EOCs. Colorimetric assay [MTT, (3-(4, 5-dimethylthiazolyl-2)-2, 5-diphenyltetrazolium bromide)] showed mean decreases in EOC proliferation by 16.21%, 23.89% and 40.08% at 24h, 48h and 72h respectively compared to control. Ingenuity Pathway Analysis (IPA, Igenuity Systems, USA) deduced important molecular pathways and signaling networks associated with cancer cell death and these correlated with significant expression of tumour suppresors and apoptotic genes in hWJSCs. Secretory products of hWJSC-CM induced cell death of EOCs via apoptosis. IPA identification of canonical genes/pathways involved in EOCs that overlap with  hWJSCs tumour suppressors and apoptosis genes further support this hypotheis. Additional in vitro and in vivo studies are necessary to validate EOCs inhibition with hWJSC-extracts towards their mechanism of action

Keywords Ovarian cancer, hWJSCs, Cell proliferation, Cell death, IPA


Kalamegam et al. Bioinformation 11(12): 529-534 (2015)

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P Kangueane






Biomedical Informatics



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