Browsing by Author "Kalkan, Goknur"

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The Effect of Acitretin Treatment on Insulin Resistance, Retinol-Binding Protein-4, Leptin, and Adiponectin in Psoriasis Vulgaris: a Noncontrolled Study
(Karger, 2013) Karadag, Ayse Serap; Ertugrul, Derun Taner; Kalkan, Goknur; Bilgili, Serap Gunes; Celik, Huseyin Tugrul; Takci, Zennure; Calka, Omer
Background/Aim: To investigate the effects of acitretin treatment on insulin resistance (IR) and adipokines, particularly retinol-binding protein (RBP)-4. Methods: Thirty-four patients with chronic plaque psoriasis and a control group of 34 healthy volunteers were recruited in the study. Screening for the parameters was performed before starting and after 3 months of acitretin treatment in the psoriasis group. The control group was only evaluated at the beginning of the study and did not receive placebo. We could not compare our results with a placebo control group because of ethical reasons. Results: Basal adiponectin (p = 0.01), insulin (p < 0.0001) levels and homeostasis model assessment (HOMA) IR (p < 0.0001) were significantly higher in psoriasis patients. After the treatment, insulin (p = 0.014), C peptide (p = 0.011), RBP-4 (p < 0.0001) levels and HOMA-IR (p = 0.008) decreased significantly. Posttreatment leptin (p = 0.036)levels were significantly lower than those of the controls. Posttreatment adiponectin (p = 0.005) and insulin (p = 0.048) levels were higher than those of the controls. Conclusions:This study showed for the first time that RBP-4 levels and IR are decreased significantly with acitretin treatment. This finding is very important in psoriasis patients because psoriasis may cause insulin resistance and diabetes. Further experimental and clinical studies are needed to clarify the effect of acitretin on adipocyte structure and behavior. (C) 2013 S. Karger AG, Basel
The Effect of Covid-19 on Development of Hair and Nail Disorders: a Turkish Multicenter, Controlled Study
(Wiley, 2023) Kutlu, Omer; Demircan, Yuhanize Tas; Yildiz, Kenan; Kalkan, Goknur; Demirseren, Duriye Deniz; An, Isa; Karadag, Ayse Serap
Background A broad spectrum of skin diseases, including hair and nails, can be directly or indirectly triggered by COVID-19. It is aimed to examine the type and frequency of hair and nail disorders after COVID-19 infection. Methods This is a multicenter study conducted on consecutive 2171 post-COVID-19 patients. Patients who developed hair and nail disorders and did not develop hair and nail disorders were recruited as subject and control groups. The type and frequency of hair and nail disorders were examined. Results The rate of the previous admission in hospital due to COVID-19 was statistically significantly more common in patients who developed hair loss after getting infected with COVID-19 (P < 0.001). Telogen effluvium (85%) was the most common hair loss type followed by worsening of androgenetic alopecia (7%) after COVID-19 infection. The mean stress scores during and after getting infected with COVID-19 were 6.88 +/- 2.77 and 3.64 +/- 3.04, respectively, in the hair loss group and were 5.77 +/- 3.18 and 2.81 +/- 2.84, respectively, in the control group (P < 0.001, P < 0.001). The frequency of recurrent COVID-19 was statistically significantly higher in men with severe androgenetic alopecia (Grades 4-7 HNS) (P = 0.012; Odds ratio: 2.931 [1.222-7.027]). The most common nail disorders were leukonychia, onycholysis, Beau's lines, onychomadesis, and onychoschisis, respectively. The symptoms of COVID-19 were statistically significantly more common in patients having nail disorders after getting infected with COVID-19 when compared to the control group (P < 0.05). Conclusion The development of both nail and hair disorders after COVID-19 seems to be related to a history of severe COVID-19.