Heterogeneity of proliferative markers in pancreatic β-cells of patients with severe hypoglycemia following Roux-en-Y gastric bypass.

Severe postprandial hypoglycemia with neuroglycopenia is an increasingly recognized, debilitating complication of Roux-en-Y gastric bypass (RYGB) surgery. Increased secretion of insulin and incretin hormones is implicated in its pathogenesis. Histopathologic examination of pancreas has demonstrated increased islet size and/or nuclear diameter in post-RYGB patients who underwent pancreatectomy for severe refractory hypoglycemia with neuroglycopenia (RYGB + NG). We aimed to determine whether β-cell proliferation or apoptosis is altered in RYGB + NG. We performed an observational study to analyze markers of proliferation, apoptosis, cell cycle, and transcription factor expression in pancreatic tissue from affected RYGB + NG patients (n = 12), normoglycemic patients undergoing pancreatic surgery for benign lesions (controls, n = 6), and individuals with hypoglycemia due to insulinoma (n = 52). Proliferative cell nuclear antigen (PCNA) expression was increased in insulin-positive cells in RYGB + NG patients (4.5-fold increase, p < 0.001 vs. controls) and correlated with β-cell mass. Ki-67 immunoreactivity was low in both RYGB + NG and controls, but did not differ between groups. Phospho-histone H3 levels did not differ between RYGB + NG and controls. PCNA and Ki-67 were both significantly lower in both controls and RYGB + NG than insulinomas. Markers of apoptosis and cell cycle (M30, p27, and p21) did not differ between groups. PDX1 and menin exhibited similar expression patterns, while FOXO1 appeared to be more cytosolic in RYGB + NG. Markers of proliferation are heterogeneous in patients with severe post-RYGB hypoglycemia. Increased β-cell proliferation in some individuals may contribute to increased β-cell mass observed in severely affected patients

Relationship between protein O -linked glycosylation and insulin-stimulated glucose transport in rat skeletal muscle following calorie restriction or exposure to O -(2-acetamido-2-deoxy-d-glucopyranosylidene)amino- N -phenylcarbamate

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/65566/1/j.1365-201X.2004.01403.x.pd

Comparative effectiveness of autologous hematopoietic stem cell transplant vs fingolimod, natalizumab, and ocrelizumab in highly active relapsing-remitting multiple sclerosis

Importance: Autologous hematopoietic stem cell transplant (AHSCT) is available for treatment of highly active multiple sclerosis (MS). Objective: To compare the effectiveness of AHSCT vs fingolimod, natalizumab, and ocrelizumab in relapsing-remitting MS by emulating pairwise trials. Design, Setting, and Participants: This comparative treatment effectiveness study included 6 specialist MS centers with AHSCT programs and international MSBase registry between 2006 and 2021. The study included patients with relapsing-remitting MS treated with AHSCT, fingolimod, natalizumab, or ocrelizumab with 2 or more years study follow-up including 2 or more disability assessments. Patients were matched on a propensity score derived from clinical and demographic characteristics. Exposure: AHSCT vs fingolimod, natalizumab, or ocrelizumab. Main outcomes: Pairwise-censored groups were compared on annualized relapse rates (ARR) and freedom from relapses and 6-month confirmed Expanded Disability Status Scale (EDSS) score worsening and improvement. Results: Of 4915 individuals, 167 were treated with AHSCT; 2558, fingolimod; 1490, natalizumab; and 700, ocrelizumab. The prematch AHSCT cohort was younger and with greater disability than the fingolimod, natalizumab, and ocrelizumab cohorts; the matched groups were closely aligned. The proportion of women ranged from 65% to 70%, and the mean (SD) age ranged from 35.3 (9.4) to 37.1 (10.6) years. The mean (SD) disease duration ranged from 7.9 (5.6) to 8.7 (5.4) years, EDSS score ranged from 3.5 (1.6) to 3.9 (1.9), and frequency of relapses ranged from 0.77 (0.94) to 0.86 (0.89) in the preceding year. Compared with the fingolimod group (769 [30.0%]), AHSCT (144 [86.2%]) was associated with fewer relapses (ARR: mean [SD], 0.09 [0.30] vs 0.20 [0.44]), similar risk of disability worsening (hazard ratio [HR], 1.70; 95% CI, 0.91-3.17), and higher chance of disability improvement (HR, 2.70; 95% CI, 1.71-4.26) over 5 years. Compared with natalizumab (730 [49.0%]), AHSCT (146 [87.4%]) was associated with marginally lower ARR (mean [SD], 0.08 [0.31] vs 0.10 [0.34]), similar risk of disability worsening (HR, 1.06; 95% CI, 0.54-2.09), and higher chance of disability improvement (HR, 2.68; 95% CI, 1.72-4.18) over 5 years. AHSCT (110 [65.9%]) and ocrelizumab (343 [49.0%]) were associated with similar ARR (mean [SD], 0.09 [0.34] vs 0.06 [0.32]), disability worsening (HR, 1.77; 95% CI, 0.61-5.08), and disability improvement (HR, 1.37; 95% CI, 0.66-2.82) over 3 years. AHSCT-related mortality occurred in 1 of 159 patients (0.6%). Conclusion: In this study, the association of AHSCT with preventing relapses and facilitating recovery from disability was considerably superior to fingolimod and marginally superior to natalizumab. This study did not find evidence for difference in the effectiveness of AHSCT and ocrelizumab over a shorter available follow-up time

Epigenetics and epigenomics: implications for diabetes and obesity

The American Diabetes Association convened a research symposium, "Epigenetics and Epigenomics: Implications for Diabetes and Obesity" on 17-19 November 2017. International experts in genetics, epigenetics, computational biology, and physiology discussed the current state of understanding of the relationships between genetics, epigenetics, and environment in diabetes and examined existing evidence for the role of epigenetic factors in regulating metabolism and the risk of diabetes and its complications. The authors summarize the presentations, which highlight how the complex interactions between genes and environment may in part be mediated through epigenetic changes and how information about nutritional and other environmental stimuli can be transmitted to the next generation. In addition, the authors present expert consensus on knowledge gaps and research recommendations for the field

Illness perceptions and psychological adjustment among persons with multiple sclerosis: the mediating role of coping strategies and social support

Purpose: The aim of this study was to test the Common Sense Model of Self-Regulation among persons with multiple sclerosis (MS), hypothesizing direct relations between illness beliefs and psychological adjustment, and indirect relations through coping strategies and social support. Materials and methods: Questionnaires were administered cross-sectionally to 680 participants (M age =40.1; 64.4% women) recruited in eight MS units to assess illness beliefs, coping strategies, social support, and adjustment indicators including life satisfaction, psychological well-being, mental health, and depression. Multiple mediational analyses were conducted to identify direct and indirect paths connecting illness beliefs to psychological outcomes. Results: Controlling for disability level, significant direct and indirect relationships were observed: Beliefs on illness coherence, personal and treatment control were associated with better adjustment; emotion representations and cyclic timeline with worse adjustment; illness identity, consequences, psychological and chance/bad luck causes with mixed positive and negative outcomes. Notably, findings identified recurrent and unique pathways connecting illness beliefs to the different indicators through meaning- and problem-focused coping strategies, avoidance and social support. Conclusions: The Common Sense Model can represent a useful framework to be tested in rehabilitation programs, jointly addressing illness beliefs and coping resources for the promotion of psychological adjustment among persons with MS.IMPLICATIONS FOR REHABILITATION Based on the Common Sense Model, the beliefs held by persons with MS about their illness are related to various aspects of psychological adjustment in multiple ways, both directly and indirectly through engagement in specific coping strategies and perception of social support. Clinicians supporting patients\u2019 adjustment may take into account that some illness beliefs were consistently associated with positive adjustment, some with poor adjustment, and some yielded mixed positive and negative results. Some ways in which coping strategies and social support connected illness beliefs to psychological adjustment were specific to the adjustment indicator under consideration including satisfaction with life, psychological well-being, mental health and depression. It may be worth testing comprehensive psychological interventions with the aim of raising awareness of one\u2019s illness beliefs, the strategies enacted in response to these beliefs, and the positive and negative relations of these processes with psychological adjustment, encompassing broad areas of individuals\u2019 lives and not only health-related issues or depression

The caring experience in multiple sclerosis : caregiving tasks, coping strategies and psychological well‐being

Informal caregivers play a crucial role in supporting persons with multiple sclerosis (MS), a neurodegenerative disease resulting in progressive worsening of physical and cognitive functioning. While research extensively showed that caregiving workload can be perceived as burdensome, little attention was devoted to the relation connecting workload and caregivers' well-being. Building on previous literature on stress and coping, the aim of this study was to test the mediational role of coping between caregivers' tasks and well-being. A group of 680 caregivers of persons with MS (M age = 46.45; 51.2% women) was recruited in eight Italian MS centres between June 2015 and December 2016. Caregiving tasks related to basic activities of daily living (ADL), instrumental ADL, psycho-emotional and social-practical care were assessed through the Caregiving Tasks in MS Scale; coping strategies (avoidance, criticism and coercion, practical assistance, supportive engagement, positive reframing) were investigated through the Coping with MS Caregiving Inventory; well-being was evaluated through the Psychological Well-Being Scales. Analyses substantiated a multi-mediation model including tasks in basic ADL, psycho-emotional and social-practical care, and the coping strategies avoidance, criticism/coercion, supportive engagement, positive reframing. Basic ADL care was negatively related to psychological well-being through lower use of supportive engagement and positive reframing. By contrast, psycho-emotional and social-practical tasks were both negatively and positively related to psychological well-being, through higher use of avoidance and criticism/coercion as well as supportive engagement and positive reframing. Findings suggest that caregiving tasks are not solely detrimental to well-being, but they may also provide a positive contribution through the adaptive coping strategies supportive engagement and positive reframing. Findings also highlighted task-specific areas that could be targeted in intervention in order to effectively lighten burden and promote well-being among caregivers