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Abstract Title:

Magnesium Protects Against Cisplatin-Induced Acute Kidney Injury without Compromising Cisplatin-Mediated Killing of an Ovarian Tumor Xenograft in Mice.

Abstract Source:

Am J Physiol Renal Physiol. 2015 May 6:ajprenal.00096.2015. Epub 2015 May 6. PMID: 25947343

Abstract Author(s):

Malvika H Solanki, Proydot K Chatterjee, Xiangying Xue, Madhu Gupta, Ivy Rosales, Michael M Yeboah, Nina Kohn, Christine N Metz

Article Affiliation:

Malvika H Solanki

Abstract:

Cisplatin, a commonly used chemotherapeutic for ovarian and other cancers, leads to hypomagnesemia in most patients and causes acute kidney injury (AKI) in 25-30% of patients. Previously, we showed that magnesium deficiency worsens and magnesium replacement during cisplatin treatment protects against cisplatin-mediated AKI in non-tumor-bearing mice. This study investigates the role of magnesium in cisplatin-induced AKI using a human ovarian tumor (A2780) xenograft model in mice and the effect of magnesium status on tumor growth and the chemotherapeutic efficacy of cisplatin in vivo. Tumor progression was unaffected by magnesium status in saline-treated mice. Cisplatin treatment reduced tumor growth in all mice, irrespective of magnesium status. In fact, cisplatin-treated magnesium-supplemented mice had reduced tumor growth after 3 weeks compared to cisplatin-treated controls. While Mg status did not interfere with tumor killing by cisplatin, it significantly affected renal function following cisplatin. Cisplatin-induced AKI was enhanced by magnesium deficiency, as evidenced by increased blood urea nitrogen (BUN), creatinine and other markers of renal damage. This was accompanied by reduced renal mRNA expression of the cisplatin efflux transporter Abcc6. These effects were significantly reversed by magnesium replacement. On the contrary, magnesium status did not affect the mRNA expression of cisplatin uptake or efflux transporters by the tumors in vivo. Finally, magnesium deficiency enhanced platinum accumulation in the kidneys and renal epithelial cells, but not in the A2780 tumor cells. These findings demonstrate the renoprotective role of magnesium during cisplatin AKI, without compromising the chemotherapeutic efficacy of cisplatin in an ovarian tumor-bearing mouse model.

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Sayer Ji
Founder of GreenMedInfo.com

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