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Annals of Clinical & Laboratory Science 38:361-367 (2008)
© 2008 Association of Clinical Scientists

Cytokine Profile of Peripheral Blood in Type 2 Diabetes Mellitus Patients with Diabetic Retinopathy

Jong-Han Lee1, Woonhyung Lee1, Oh Hun Kwon1, Jeong-Ho Kim1, Oh Woong Kwon2, Kyung Hwan Kim3 and Jong-Baeck Lim1
1 Departments of Laboratory Medicine, 2 Ophthalmology, and 3 Pharmacology, Yonsei University College of Medicine, Seoul, Korea

Address correspondence to Jong-Baeck Lim, M.D., Ph.D., Department of Laboratory Medicine, Yonsei University College of Medicine, 134 Shinchon-dong, Seodaemun-gu, Seoul, Korea 120-752; tel 82 2 2228 2447; fax 82 2 364 1583; e-mail jlim{at}yuhs.ac.

To evaluate the usefulness of cytokine levels of peripheral blood in diabetic retinopathy (DR), demographic and biochemical parameters including low-density lipoprotein (LDL) diameter as well as cytokine profiles were analyzed in 74 patients with type 2 diabetes mellitus (DM), with DR (n = 46) or without DR (n = 28). DM duration was longer in the patients with DR than without (p <0.001). Serum glucose (p = 0.005) and total cholesterol (p = 0.029) levels were higher in DM patients with DR than DM patients without DR. Plasma LDL diameter, interleukin-6 (IL-6), and interleukin-8 (IL-8) showed significant differences among the different degrees of DR severity in analysis of variance (ANOVA) with no definite trend. The risk of DR in DM patients was decreased by an increase of interleukin-10 (IL-10) level [odds ratio (OR) = 0.152; confidence interval (CI): 0.028–0.817]. Plasma LDL diameter was smaller and IL-6 and tumor necrosis factor-alpha (TNF-{alpha}) levels were higher in DM patients with proliferative diabetic retinopathy (PDR) compared to those with non-proliferative diabetic retinopathy (NPDR) (p <0.05). We found that higher IL-10 levels were related to lower risk of DR in DM patients. Levels of IL-6 and TNF-{alpha} as well as LDL diameter may be helpful in the prediction of PDR in DM patients with DR.

Keywords: plasma cytokine levels, plasma LDL diameter, proliferative diabetic retinopathy






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