Relationship between diabetic retinopathy and cerebral perfusion in type 2 diabetes mellitus
Zherdiova N.M., Cand Sc (Med), Medvedovska N.V., Dr Sc (Med), Makeev S.K., Dr Sc (Med), Mankovsky BN, NAMS Corr Member, Prof, Dr Sc (Med)
Shupyk National Medical Academy of Postgraduate Education;
Background: Compared to patients without diabetic retinopathy (DR), those with DR demonstrate better cognitive performance. It is therefore reasonable to hypothesize that retinal microcirculatory changes might be a marker of impaired cerebral microcirculation.
Purpose: To examine the association between the presence of diabetic retinopathy and cerebral perfusion in patients with type 2 diabetes mellitus (T2DM).
Materials and Methods: Ninety-five T2DM patients aged 50-70 years were enrolled. They were divided into two groups, those with DR (DR group) and without DR (non-DR group). Regional cerebral blood flows (rCBF) were measured with 99mTc-HMPAO single-photon emission computed tomography (SPECT).
Results: Linear regression analysis revealed negative relationships between DR and cerebral perfusion impairments in right frontal lobe (B (95% CI) = 0.58 (-0.98/-0.18); P = 0.01), left frontal (B (95% CI) = -0.55 (-0.99/-0.12); P = 0.02) lobe, right parietal lobe (B (95% CI) = -0.68 (-1.19/-0.16); P = 0.01), left parietal lobe (B (95% CI) = -0.79 (-1.31/-0.27); P = 0.00); right occipital lobe (B (95% CI) = -0.61(-1.17/-0.06); P = 0.03), left occipital lobe (B (95% CI) = -0.81 (-1.35/-0.26); P = 0.00); right cerebral cortex (B (95% CI) = -0,58 (-0.98/-0.18); P = 0.01) and left cerebral cortex (B (95% CI) = -0.54 (-91/-0.17); P = 0.01).
Conclusions: The findings might indicate that, in diabetic patients, damage to retinal microvessels develops somewhat in parallel with that to the brain.
Keywords: diabetic retinopathy, type 2 diabetes mellitus, cerebral blood flow
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