Mehmet TÜRKEN, Sedat YILMAZ, Leyla ÇOLPAN, Belkis AYDINOL, Alpaslan TUZCU

The effect of vitamin D deficiency on serum sIL-2R, IL-6 and TNF-alpha levels in adults with Type 1 diabetes

Objective: The aim of this study was to investigate the role of vitamin D deficiency in DMT1 pathogenesis by examining the effects of vitamin D levels on immune modulatory cytokines in patients with DMT1.Methods: Thirty adults with DMT1 from the endocrine clinic and 30 healthy controls were included in the study. Measurements for 25-hydroxyvitamin D (25OHD), soluble interleukin-2 receptor (sIL-2R), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α) levels were obtained from serum samples from each study participant. Measurements were compared between the control group and the patient group. Correlations between 25OHD levels and the levels of sIL-2R, IL-6, and TNF-α cytokines were investigated in patients with DMT1.Results: The mean 25OHD value for the DMT1 patients was significantly lower than for the control group (14.9±9.8 ng/ml versus 24.8±9.4 ng/ml, respectively; p<0.01). The mean sIL-2R and TNF-α scores for patients with DMT1 were significantly higher than for the control group (707.3 ± 265 U/mL versus 403.1 ± 128 U/mL, respectively; p<0.01; and 10.2±3.0 pg/mL versus 3.8 ± 1.6 pg/mL, respectively; p<0.01). There was no significant difference between the mean IL-6 scores of the DMT1 patients and the controls (3.7±1.5 pg/mL versus 4.6±1.3 pg/mL, respectively; p=0,202). Negative correlations with varying levels of significance were observed between 25OHD and sIL-2R, IL-6, and TNF-α cytokine levels in patients with DMT1.Conclusion: Vitamin D deficiency in DMT1 patients may contribute to disease pathogenesis by increasing sIL-2R, IL-6, and TNF-α cytokines.Key words: Diabetes mellitus type 1, vitamin D deficiency, soluble interleukin-2 receptor, interleukin-6, tumor necrosis factor-α

Anahtar Kelimeler:

Tip1 diyabetes mellitus, D vitamini eksikliği, solubl interlökin-2 reseptör, interlökin-6, tümör nekrozis faktör alfa-α

The comparison of Brucella gel agglutination test with other Brucella tests

Objective: In this study, it was aimed to compare the sensitivity of diagnostic tests in patients with a preliminary diagnosis of brucellosis.Methods: We have compared the serological methods, standard tube agglutination test (STA), Coombs Test (CT), Rose Bengal (RBT), and the gel centrifugation test. In patients with a preliminary diagnosis of brucellosis, subjects with a positive test result of RBT has been included in the research and other diagnostic tests STA, CT and Coombs Gel centrifugation tests were performed within the range of same titration.Results: Total 132 patient’s serums were studied. In RBT positive 92 patients’ serums, negative test results were found in 11 with STA, in 9 with CT and in 6 with gel test. While 35 patients were identified to be positive by using Brucella gel test at 1/5120 titer, no positive test results were seen with STA and CT at the same titer. Generally, CT results were one titration below the gel centrifugation test results.Conclusion: In conclusion, RBT and STA were not always adequate to determine the diagnosis of brucellosis. Low titer STA results should be supported by tests such as CT or gel centrifugation and the seroconversion must be monitored. Due to giving fast results, gel centrifugation test can be preferred in diagnosis of Brucellosis.Key words: Brucellosis, gel centrifugation, Coombs test

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