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The role of clinical response to metformin in patients newly diagnosed with type 2 diabetes: a monotherapy study.
MedLine Citation:
PMID:  24740684     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
A major predicament in certain users of metformin, which is one of the most commonly used antihyperglycemic agents for type 2 diabetes (T2DM) treatment, is the lack of appropriate response to the drug. We evaluated the role of metformin response and OCT1 (organic cation transporter1) Met420del polymorphism in a monotherapy study (metformin therapy for 12 weeks) on patients newly diagnosed with T2DM. Based on the response to metformin, patients (n = 108) were divided into two groups: responders (n = 49) and non-responders (n = 59). HbA1c levels were determined by affinity technique. The OCT1-Met420del polymorphism was genotyped by PCR-based restriction fragment length polymorphism. There was a significant association between the variable response with HbA1c and fasting blood sugar (FBS) (Wilks' λ = 0.905, p = 0.01). Responders had significantly lower HbA1c and FBS levels compared with non-responders (η (2) = 0.087, p = 0.004 for HbA1c and η (2) = 0.055, p = 0.022 for FBS). The interaction treatment-response increased the effect sizes from 32 to 58 % for HbA1c. Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) values were significantly lower in the responder group than in the non-responders (η (2) = 0.067, p = 0.01 for ALT and η (2) = 0.052, p = 0.025 for AST). This observational study showed that the variant OCT1-Met420del may be more effective on plasma glucose than HbA1c. The variable response could account for a significant proportion of the variance in HbA1c levels observed following treatment with metformin. Metformin shows a significantly greater effect on ALT and AST in responders than in non-responders.
Authors:
Abdolkarim Mahrooz; Hassan Parsanasab; Mohammad Bagher Hashemi-Soteh; Zahra Kashi; Adele Bahar; Ahad Alizadeh; Maliheh Mozayeni
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-4-17
Journal Detail:
Title:  Clinical and experimental medicine     Volume:  -     ISSN:  1591-9528     ISO Abbreviation:  Clin. Exp. Med.     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-4-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100973405     Medline TA:  Clin Exp Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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