The effects of sitagliptin, a DPP-4 inhibitor, on cognitive functions in elderly diabetic patients with or without Alzheimer's disease.

Abstract:

AIMS:The present study aimed to evaluate effect of sitagliptin, a dipeptidyl peptidase-4 inhibitor (DPP-4I), on cognitive functions in elderly diabetic patients with and without cognitive impairment. METHODS:253 elderly patients with type 2DM, were enrolled in this prospective and observational study. After comprehensive geriatric assessment, the patients were divided into either sitagliptin or non-sitagliptin group. RESULTS:A total of 205 patients who completed the study (52 with Alzheimer's Disease (AD)) were re-evaluated 6months later. Sixth-month evaluation revealed no difference between sitagliptin and non-sitagliptin groups in terms of weight, body mass index, and HbA1c (p>0.05). However, the number of patients that required reduced insulin dose was significantly higher in the sitagliptin group (p=0.01). Sitagliptin therapy was associated with an increase in the Mini-Mental State Examination (MMSE) scores (p=0.034); patients without AD receiving only sitagliptin or insulin showed higher MMSE scores as compared to the patients receiving metformin alone (p=0.024). Likewise, the change in MMSE scores in AD patients receiving sitagliptin was significant and indicated improvement as compared to the patients receiving metformin (p=0.047). CONCLUSION:Besides its effects similar to those of insulin and metformin in glycemic control and in reducing need for insulin, 6-month sitagliptin therapy may also associated with improvement of cognitive function in elderly diabetic patients with and without AD. Further randomized controlled trials are needed to support these results.

authors

Isik AT,Soysal P,Yay A,Usarel C

doi

10.1016/j.diabres.2016.12.010

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

192-198

eissn

0168-8227

issn

1872-8227

pii

S0168-8227(16)30473-9

journal_volume

123

pub_type

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