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    Biochemical and histopathologic assessment of effects of acitretin on epiphyseal growth plate in rats
    (Termedia Publishing House Ltd, 2020) Onder, Sevda; Bilgili, Serap Gunes; Bulut, Gulay; Celik, Huseyin Tugrul; Oguztuzun, Serpil; Onder, Haci; Calka, Omer
    Introduction: Acitretin is a commonly used retinoid in dermatology. Although there are generally known side effects, the effects on the epiphyseal plaque and bone metabolism are not clear in the literature. Aim: To histopathologically investigate the effects on the epiphyseal plate and assess variations in bone metabolism caused by acitretin. Material and methods: Three groups were formed with 10 rats in each group. The 1st group (n = 10, 5 male, 5 female) were administered 10 mg/kg/day oral acitretin solution and the 2nd group (n = 10, 5 male, 5 female) were administered 3 mg/kg/day oral acitretin solution. The control group were given normal standard feed and water. Rats were sacrificed at the end of 4 weeks. The proximal tibias were excised and histopathologically and immunohistochemically assessed. Biochemical assessment was also carried out. Results: Staining with haematoxylin-eosin found reductions in the epiphyseal plate in the 1st and 2nd group compared to the control group, though this situation was not statistically significant. Immunohistochemical studies did not encounter Type II collagen in the epiphyseal bone, proliferative zone and hypertrophic zone in the control group, low dose acitretin solution group and high dose acitretin solution group. Type II collagen was not observed in osteoids and osteoblasts. Type I collagen was not observed in the hypertrophic zone and proliferative zone of any group. Conclusions: Our data show that though acitretin caused degeneration of the epiphyseal plate, it did not cause clear thinning and we identified no significant variations in bone metabolism markers.
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    The Effect of Isotretinoin on Retinol-Binding Protein 4, Leptin, Adiponectin and Insulin Resistance in Acne Vulgaris Patients
    (Karger, 2015) Karadag, Ayse Serap; Ertugrul, Derun Taner; Takci, Zennure; Bilgili, Serap Gunes; Namuslu, Mehmet; Ata, Naim; Sekeroglu, Ramazan
    Background: The effect of isotretinoin (ISO) on adipokines and insulin resistance has been investigated in a few studies, and the results are conflicting. Objective: The aim of this study was to investigate the effect of ISO treatment on insulin resistance and adipokines. Methods: Thirty-three patients with acne vulgaris and a control group of 30 healthy volunteers were included in our study. Screening for the biochemical parameters was performed just before the initiation and after 3 months of ISO treatment. Results: In the acne group, basal leptin levels were significantly lower (p = 0.003) and basal adiponectin levels significantly higher (p = 0.008) compared with the control group. After ISO treatment, leptin levels (p = 0.0005) decreased and adiponectin levels (p = 0.003) increased significantly. However, measurements of fasting blood glucose, insulin, C peptide, retinol-binding protein 4 (RBP4), homeostasis model assessment insulin re-sistance and BMI did not differ after ISO treatment. Conclusion: ISO may affect leptin and adiponectin levels. It does not, however, affect insulin resistance and RBP4 levels. (C) 20155. Karger AG, Basel