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INTRODUCTION: Obesity presents with structural and functional hypothalamic dysfunction. However, it is unclear whether weight loss can lead to hypothalamic changes. We therefore aimed to conduct a systematic review and meta-analysis to determine the effect of body mass reduction in obese individuals on hypothalamic structure and function. METHODS: PubMed, Embase and Cochrane databases were searched for studies that reported the change in hypothalamic structure and function after weight loss. Qualitative and quantitative analyses were performed on magnetic resonance imaging techniques, medio-basal hypothalamus T2-relaxation time, blood oxygen level dependent (BOLD) contrast, voxel-based morphometry (VBM) and biomarkers including glucose, insulin, leptin, ghrelin and inflammatory markers of interleukins. Mean differences between pre- and post-weight loss and 95% confidence intervals (CIs) were pooled using random-effects models. RESULTS: Thirteen pre-post studies were included, of which six accounted for the meta-analysis. Studies showed a favorable decrease in T2-relaxation time (n = 1), favorable change in hypothalamic activity after weight loss on BOLD contrast (n = 4), with higher peak activities after surgical weight loss (n = 2). No differences were found in the gray matter density of the hypothalamus on VBM (n = 1). Pooled mean differences between pre- and post-surgical weight loss revealed a decrease of 8.53 mg/dl (95% CI: 5.17, 11.9) in glucose, 7.73 pmol/l (95% CI: 5.07, 10.4) in insulin, 15.5 ng/ml (95% CI: 9.40, 21.6) in leptin, 142.9 pg/ml (95% CI: 79.0, 206.8) in ghrelin and 9.43 pg/ml (95% CI: -6.89, 25.7) in IL-6 level. CONCLUSIONS: Our study showed weight reduction in obesity led to limited structural change and significant functional changes in the hypothalamus.
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BACKGROUND: While clinical trial data on the efficacy of itolizumab in the management of psoriasis is relatively well documented, data on the effectiveness of this humanized IgG1 monoclonal antibody in real-world settings is sparse. AIMS: The current study assessed the effectiveness of itolizumab in real-world settings. MATERIALS AND METHODS: This study assessed psoriasis area severity index (PASI), dermatology quality of life index (DLQI), safety, and tolerability data from a registry of itolizumab maintained by Syngene International, Bangalore. Registry data of 155 patients who were prescribed itolizumab at a dose of 1.6 mg/kg every 2 weeks for the first 12 weeks followed by 1.6 mg/kg every 4 weeks for up to 24 weeks for chronic plaque psoriasis. RESULTS: In the study, 35.48% completed itolizumab for 12 weeks and 76.59% of these patients achieved PASI 75. Furthermore, 24.51% patients completed the full Itolizumab regimen for 24 weeks, of whom 92.01% patients achieved PASI 75. The mean percent change in DLQI scores at weeks 12 and 24 were 60.19 and 82.72, respectively. Adverse events and infusion reactions noted in the study were generally of mild to moderate severity. CONCLUSION: Itolizumab is a safe and effective option in treatment-compliant patients with chronic plaque psoriasis. Effects of putative compliance-modulators such as cost, route of administration, and delayed onset of action warrant further investigation.
