Browsing by Author "Gulcan, Erim"

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Combined Immune Thrombocytopenic Purpura and Immunoglobulin a Nephropathy: a Similar Pathophysiologic Process
(informa Healthcare, 2014) Kahraman, Cuneyt; Emre, Habib; Gulcan, Erim; Bilen, Yusuf; Uludag, Koray; Uyanik, Abdullah; Keles, Mustafa
IgA nephropathy is one of the most common forms of glomerulopathies. It is an immune complex-mediated glomerulonephritis diagnosed by the presence of mesangial IgA deposits that are often associated with mesangial cell proliferation. The IgG, C-3, IgM, or other immunoglobulin light chains may be co-existed with IgA. Its pathogenesis suggested that it is responsible for enhancing the production of proinflammatory cytokines, chemokines, and growth factors. Platelet-derived growth factor (PDGF) has also been implicated as a modulator of disease activity. Immune thrombocytopenic purpura (ITP) is a bleeding disorder caused by thrombocytopenia that is not associated with a systemic disease. Its pathogenesis suggested an autoimmune disease in which IgG is thought to damage megakaryocytes, which are the precursors of platelet cells. Several studies reported that PDGF levels were higher in normal subjects than in patients with ITP. Moreover, ITP is a disease related to the antibody. Thus, our aim is to examine whether a similar pathophysiological relationship exist between ITP and IgAN that may be mediated by PDGF and/or IgG.
Topical Effects of Nebivolol on Wounds in Diabetic Rats
(Elsevier Science Bv, 2012) Gulcan, Erim; Kucuk, Aysegul; Cayci, Kasim; Tosun, Murat; Emre, Habib; Koral, Lokman; Avsar, Umit
Objective: Recently, it has reported that nebivolol might be useful in the treatment of diabetes mellitus foot ulcers. The aim of this study was to examine treatment of the wounds in streptozotocin-induced diabetic rats with topical nebivolol. Methods: Two 15 x 15 mm-sized wounds were created in 56 streptozotocin-induced rats. A total of 56 diabetic wounds were studied in eight groups (n = 7). No treatment was administered to the first and second groups. The third and fourth groups consisted of diabetic rats that were administered 1:1 mixture of lanolin and vaseline for 7 and 14 days, respectively. Five percent nebivolol plus 1:1 mixture of lanolin and vaseline was administered to rats in the fifth and sixth groups for 7 and 14 days, respectively, and 10% nebivolol plus 1:1 mixture of lanolin and vaseline was administered to rats in the seventh and eighth groups for 7 and 14 days, respectively. On days 7 and 14, wound healing was observed, and the percent of wound healing was determined by measuring its size and histopathologic examination. The ratio was calculated by the formula, healing ratio (%) = 100 x (1-wound area/initial wound area). Statistical analysis was performed by ANOVA with Tukey's HSD test and Mann-Whitney U test, using SPSS 15.0 software. Results: On days 7 and 14, rates of wound healing in the fifth, sixth, seventh, and eighth groups were 57.42%, 89.16%, 60.80%, and 91.80%, respectively. Multiple comparison showed that rates of wound healing were significantly higher in rats administered 5% and 10% nebivolol than those in rats administered a mixture of lanolin and vaseline and in the untreated group (P < 0.05). Conclusion: Topical nebivolol therapy may be useful for wound healing in diabetic rats. Further studies are needed to support these data. (c) 2012 Elsevier B.V. All rights reserved.