Abstract
Aims
The possibility that verapamil has new beneficial effects in diabetic patients in terms of an improvement in glycometabolic control has been put forward recently in several studies. However, to date the issue is still under debate. We conducted the first systematic review examining the impact of verapamil-based treatment on glycometabolic outcomes, in type 2 diabetes (T2D) patients.
Methods
We searched the PubMed, MEDLINE, Embase, Cochrane and ClinicalTrials.gov up to 9 October 2018, for all studies evaluating whether verapamil-based treatment is associated with changes in glycated haemoglobin (HbA1c), fasting plasma glucose levels, glucose and C-peptide areas from baseline in humans, without restrictions for study type.
Results
Plasma glucose levels were lowered significantly by verapamil-based treatment in patients with T2D (mean change − 13 ± 5.29; P = 0.049); HbA1c values were instead not affected by the drug (mean change − 0.10 ± 0.12; P = 0.453). In five studies, groups exposed to verapamil achieved lower value of glycometabolic outcomes: comparison with values recorded in control groups showed a significant difference, in terms of both HbA1c and plasma glucose levels.
Conclusions
Despite the fact that plasma glucose levels were lowered significantly by verapamil-based treatment in patients with T2D (the HbA1c values were not affected by the drug), the clinical significance of the glycometabolic response induced by verapamil-based treatment remains unclear due to the high variety of sample size and type of studies presently available. Further experimental and clinical trials are needed to clarify unambiguously the role of verapamil in metabolic control.
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Abbreviations
- CCB:
-
Calcium channel blocker
- FPG:
-
Fasting plasma glucose
- HbA1c:
-
Haemoglobin A1c, A1C, glycosylated haemoglobin, glycated haemoglobin, glycol-haemoglobin
- Rob:
-
Risk of bias
- T2D:
-
Type 2 diabetes
- TXNIP:
-
Thioredoxin-interacting protein
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Acknowledgements
Faizan Mazhar is supported by the 33rd cycle Ph.D. programme in “Scienze Farmacologiche Sperimentali e Cliniche”, Università degli Studi di Milano.
Funding
The financial support by the Agenzia Italiana del Farmaco (AIFA), by the Centre of Pharmacovigilance of Regione Lombardia (MEAP project, Monitoraggio degli Eventi Avversi nelle Popolazioni a Rischio, to EC), by the Italian Ministry of Health (Ricerca Corrente 2018, to MP) is gratefully acknowledged. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
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CC conceptualised and designed the study, carried out the data extraction and statistical analyses, drafted the manuscript and the summary tables, revised and approved the final manuscript as submitted; AD, GM and FM contributed to literature extraction and manuscript revision and approved the final manuscript as submitted; FD, MP and SR participated in the conceptualisation and design of the study, participated in the analysis of the data, revised the article, and approved the final article as submitted. PF and EC contributed to concept and design of the study, participated in the analysis and interpretation of the data, coordinated and supervised data collection, critically reviewed the manuscript and approved the final manuscript as submitted.
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Supplementary Figure 1
Summary of the risk-of-bias assessment, according to the Cochrane Collaboration tool. (TIFF 259 kb)
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Carnovale, C., Dassano, A., Mosini, G. et al. The β-cell effect of verapamil-based treatment in patients with type 2 diabetes: a systematic review. Acta Diabetol 57, 117–131 (2020). https://doi.org/10.1007/s00592-019-01370-1
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DOI: https://doi.org/10.1007/s00592-019-01370-1