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Public Health.

Avi Cohen1, Stephen Z Levine1, Shiraz Vered1

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Summary
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Dipeptidyl peptidase 4 inhibitors (DPP-4i) did not significantly alter cognitive function in older adults with type 2 diabetes. However, a trend suggested slower memory decline in DPP-4i users, particularly over age 70.

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Area of Science:

  • Gerontology
  • Pharmacology
  • Neuroscience

Background:

  • Dipeptidyl peptidase 4 inhibitors (DPP-4i) are common antidiabetic drugs with potential neuroprotective effects.
  • The impact of DPP-4i on cognitive function in older adults with type 2 diabetes (T2D) remains unclear.

Purpose of the Study:

  • To investigate the association between DPP-4 inhibitor use and cognitive function changes in elderly T2D patients.
  • To analyze the impact of DPP-4i on memory, attention, executive functions, and semantic categorization.

Main Methods:

  • Longitudinal study of non-demented T2D adults (≥65 years) from the Israel Diabetes and Cognitive Decline (IDCD) cohort.
  • Analysis of electronic health records for antidiabetic medication use, classifying exposure to DPP-4i.
  • Linear mixed-effects models adjusted for confounders to assess cognitive changes over time.

Main Results:

  • No significant differences in global cognition, attention, executive function, or semantic categorization were found between DPP-4i users and non-users.
  • A trend towards slower memory decline was observed in the DPP-4i group (p=0.06).
  • Memory score divergence was noted in individuals over 70 years old.

Conclusions:

  • DPP-4i use was not significantly associated with overall cognitive function changes in this T2D cohort.
  • A potential trend of preserved memory function warrants further investigation.
  • Larger sample sizes and longer follow-up periods are needed to confirm these findings.