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Journal of Ovarian Research

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Open Access 01-12-2011 | Research

MicroRNA signature of cis-platin resistant vs. cis-platin sensitive ovarian cancer cell lines

Authors: Smriti Kumar, Arooshi Kumar, Parag P Shah, Shesh N Rai, Siva K Panguluri, Sham S Kakar

Published in: Journal of Ovarian Research | Issue 1/2011

Abstract

Background

Ovarian cancer is the leading cause of death from gynecologic cancer in women worldwide. According to the National Cancer Institute, ovarian cancer has the highest mortality rate among all the reproductive cancers in women. Advanced stage diagnosis and chemo/radio-resistance is a major obstacle in treating advanced ovarian cancer. The most commonly employed chemotherapeutic drug for ovarian cancer treatment is cis-platin. As with most chemotherapeutic drugs, many patients eventually become resistant to cis-platin and therefore, diminishing its effect. The efficacy of current treatments may be improved by increasing the sensitivity of cancer cells to chemo/radiation therapies.

Methods

The present study is focused on identifying the differential expression of regulatory microRNAs (miRNAs) between cis-platin sensitive (A2780), and cis-platin resistant (A2780/CP70) cell lines. Cell proliferation assays were conducted to test the sensitivity of the two cell lines to cis-platin. Differential expression patterns of miRNA between cis-platin sensitive and cis-platin resistant cell lines were analyzed using novel LNA technology.

Results

Our results revealed changes in expression of 11 miRNAs out of 1,500 miRNAs analyzed. Out of the 11 miRNAs identified, 5 were up-regulated in the A2780/CP70 cell line and 6 were down regulated as compared to cis-platin sensitive A2780 cells. Our microRNA data was further validated by quantitative real-time PCR for these selected miRNAs. Ingenuity Pathway Analysis (IPA) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis was performed for the selected miRNAs and their putative targets to identify the potential pathways and networks involved in cis-platin resistance.

Conclusions

Our data clearly showed the differential expression of 11 miRNAs in cis-platin resistant cells, which could potentially target many important pathways including MAPK, TGF-β signaling, actin cytoskeleton, ubiquitin mediated proteasomal pathway, Wnt signaling, mTOR signaling, Notch signaling, apoptosis, and many other signaling pathways. Manipulation of one or more of these miRNAs could be an important approach for ovarian cancer chemotherapy.

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Title: MicroRNA signature of cis-platin resistant vs. cis-platin sensitive ovarian cancer cell lines
Authors: Smriti Kumar
Arooshi Kumar
Parag P Shah
Shesh N Rai
Siva K Panguluri
Sham S Kakar
Publication date: 01-12-2011
Publisher: BioMed Central
Published in: Journal of Ovarian Research / Issue 1/2011
Electronic ISSN: 1757-2215
DOI: https://doi.org/10.1186/1757-2215-4-17

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

MicroRNA signature of cis-platin resistant vs. cis-platin sensitive ovarian cancer cell lines

Abstract

Background

Methods

Results

Conclusions

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Background

Methods

Results

Conclusions

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