Hyperglycaemia Induced by Novel Anticancer Agents: An Undesirable Complication or a Potential Therapeutic Opportunity?

Rashmi R. Shah ()

Drug Safety, 2017, vol. 40, issue 3, No 3, 228 pages

Abstract: Abstract Signalling pathways involving protein kinase, insulin-like growth factor 1, insulin receptors and the phosphoinositide 3 kinase/protein kinase B/mammalian target of rapamycin (PI3K/AKT/mTOR) system are critical in promoting oncogenesis. The use of anticancer agents that inhibit these pathways frequently results in hyperglycaemia, an on-target effect of these drugs. Hyperglycaemia induced by these agents denotes optimal inhibition of the desired pharmacological target. As hyperglycaemia can be treated successfully and effectively with metformin, managing this complication by reducing the dose of or discontinuing the anticancer drug may be counterproductive, especially if it is otherwise effective and clinically tolerated. The use of metformin to treat hyperglycaemia induced by anticancer drugs provides a valuable therapeutic opportunity of potentiating their clinical anticancer effects. Although evidence from randomised controlled trials is awaited, extensive preclinical evidence and clinical observational studies suggest that metformin has anticancer properties that improve overall survival in patients with diabetes and a variety of cancers. Metformin has also been reported to reverse resistance to epidermal growth factor receptor (EGFR)-inhibiting tyrosine kinase inhibitors. This review summarises briefly the role of the above signalling pathways in oncogenesis, the causal association between inhibition of these pathways and hyperglycaemia, and the effect of metformin on clinical outcomes resulting from its anticancer properties. The evidence reviewed herein, albeit almost exclusively from observational studies, provides support for a greater use of metformin not only in patients with cancer and diabetes or drug-induced hyperglycaemia but also potentially as an anticancer drug. However, prospective randomised controlled studies are needed in all these settings to better assess the effect on clinical outcomes of adding metformin to ongoing anticancer therapy.

Keywords: Overall Survival; Epidermal Growth Factor Receptor; Metformin; Sunitinib; Insulin Receptor (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1007/s40264-016-0485-y

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