- MeSH
- inzulinová rezistence fyziologie MeSH
- kanabinoidy metabolismus MeSH
- lidé MeSH
- mastné kyseliny * dějiny fyziologie klasifikace metabolismus MeSH
- nenasycené mastné kyseliny fyziologie metabolismus MeSH
- obezita * patofyziologie MeSH
- přijímání potravy MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- přehledy MeSH
INTRODUCTION: Patients who have sustained extensive burns frequently exhibit substantial damage to skeletal muscle and associated complications. The rehabilitation of these patients can be challenging due to the nature of the injury and the subsequent complications. Nevertheless, there is a possibility that functional proprioceptive stimulation (illusory movements) may facilitate effective rehabilitation in patients with limited physiotherapy options. Nevertheless, this approach has yet to be tested in patients with burn injuries. MATERIAL AND METHODOLOGY: A prospective, randomised, crossover trial was conducted at a burn centre in a tertiary teaching hospital. The objective was to assess the effects of illusory movements on energy metabolism, insulin sensitivity, and skeletal muscle biology in adult critically ill patients with deep burns covering 30 % or more of the total body surface area. Two 30-minute daily sessions of functional proprioceptive stimulation were administered in addition to the standard physical therapy or physical activity regimen. Subsequently, the patients proceeded to the next stage of the trial, which involved a two-week crossover period. MEASUREMENTS AND MAIN RESULTS: Daily indirect calorimetry and calculation of nitrogen balance. Skeletal muscle biopsies from vastus lateralis for high resolution respirometry and euglycemic clamps to assess whole body glucose disposal were performed three times: at baseline and then fortnightly after each intervention period. The intervention was feasible and well tolerated in both early and late stages of burn disease. It did not change energy expenditure (mean change -33 [95 % CI: -292;+227] kcal .24 h-1, p = 0.79), nitrogen balance (+2.0 [95 % CI: -3.1;+7.1] g N .1.73 m-2 BSA .24 h-1), or insulin sensitivity (mean change of insulin-mediated glucose disposal -0.33 [95 % CI: -1.18;+0.53] mmol.h-1). At the cellular level, the intervention increased the capacity of mitochondria to synthesize ATP by aerobic phosphorylation and tended to increase mitochondrial coupling. Functional capacities of fatty acid oxidation and electron transfer chain complexes I, II, and IV were unaffected. CONCLUSIONS: Compared to physical therapy alone, two daily sessions of functional proprioceptive stimulation in addition to usual physical therapy in patients with extensive burns did not change energy expenditure, insulin sensitivity, nitrogen balance, or energy substrate oxidation. At cellular level, the intervention improved the capacity of aerobic phosphorylation in skeletal muscle mitochondria. Clinical effects remain to be demonstrated in adequately powered trials.
- MeSH
- dospělí MeSH
- energetický metabolismus * fyziologie MeSH
- fyzioterapie (techniky) MeSH
- inzulinová rezistence fyziologie MeSH
- klinické křížové studie * MeSH
- kosterní svaly * metabolismus patofyziologie MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladý dospělý MeSH
- nepřímá kalorimetrie MeSH
- popálení * metabolismus terapie rehabilitace patofyziologie komplikace MeSH
- povrch těla MeSH
- propriocepce fyziologie MeSH
- prospektivní studie MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mladý dospělý MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- randomizované kontrolované studie MeSH
Background: Asprosin is correlated to many pathologic of glucose dysregulation, insulin resistance, β-cell dysfunction, serum lipids, and adiposity.Objective investigating the role of the asprosin hormone and its relationship to insulin resistance in newly diagnosed metabolic syndrome and clinical parameters.Methods: The study included measurement of asprosin hormone, insulin, insulin resistance and some biochemical variable levels in metabolic syndrome patients with age matching to the control group (35 - 65 years). The study included the measurement of asprosin hormone. MetS were diagnosed in compliance with the European Group for the Study of Insulin Resistance (EGIR) criteria for patients attending the abdominal consultation unit at the Ibn Sina Teaching Hospital in Mosul, Iraq.Results: The findings revealed a significant increase in the concertation of asprosin hormone in metabolic syndrome patients compared to the control group. Also, it has been found that was a significant increase in the concertation of glucose, insulin, homeostasis model for insulin resistance (HOMA-IR), Glucose to insulin Ratio(G/I), Triglyceride Glucose index (TyG), and McAuley Index, in addition to decreasing in homeostasis model for β-cell function(HOMA-%β), sensitivity of insulin(HOMA-%S) and Quantitative insulin sensitivity check index(QUICKI) in the metabolic syndrome patients. there is also a significant positive correlation between asprosin hormone with insulin resistance.Conclusion: Findings indicated that serum levels of asprosin and insulin resistance are increased in patients with metabolic syndrome. Also, they have a relationship with clinical parameters. So asprosin hormone can be used new biomarker of metabolic turbulence.
- Klíčová slova
- asprosin,
- MeSH
- biologické markery analýza MeSH
- dospělí MeSH
- hormony analýza MeSH
- index tělesné hmotnosti MeSH
- inzulinová rezistence * fyziologie MeSH
- inzuliny analýza MeSH
- klinické laboratorní techniky metody přístrojové vybavení MeSH
- lidé středního věku MeSH
- lidé MeSH
- metabolický syndrom * komplikace patologie MeSH
- Check Tag
- dospělí MeSH
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- klinická studie MeSH
Bariatric procedures are considered to be the most effective treatment options for obesity. One of them is laparoscopic sleeve gastrectomy (LSG), which is nowadays very popular and widely used. LSG leads to weight loss and metabolic improvement and also changes adipokine levels, although it is just a restrictive operation. We describe changes in pro-inflammatory (leptin, resistin, visfatin and chemerin) and anti-inflammatory adipokines (adiponectin, omentin), with adiponectin and leptin being most studied. Their levels are markedly changed after LSG and this may partially explain the weight loss seen after LSG. Adipokines are closely connected to insulin resistance and chronic inflammation both being positively influenced after LSG. Leptin regulates amount of body fat, appetite, thermogenesis and metabolic rate and its levels are positively correlated with both weight and BMI changes after operation. Resistin influences insulin sensitivity, modulates body cholesterol trafficking and its changes after operation correlate with BMI, waist circumference, fat mass, LDL cholesterol and C-reactive protein. Chemerin, an important component of immune system, decreases after bariatric surgery and its levels correlate with BMI, triglyceride levels, and blood glucose. On the other hand, pro-inflammatory adipokine adiponectin, which influences fatty acid oxidation, browning of fat tissue and energy metabolism, is declining after LSG. This decline explains improvement of glucose status after bariatric surgery in patients with diabetes and is correlated with BMI loss, waist circumference and LDL cholesterol level. Effect of LSG goes beyond calory restriction and the changes of adipokines have a great impact on health status of the bariatric patients.
- MeSH
- adipokiny MeSH
- adiponektin MeSH
- gastrektomie metody MeSH
- hmotnostní úbytek fyziologie MeSH
- inzulinová rezistence * fyziologie MeSH
- laparoskopie * metody MeSH
- LDL-cholesterol MeSH
- leptin MeSH
- lidé MeSH
- morbidní obezita * metabolismus chirurgie MeSH
- resistin MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
In recent years, there has been an increasing incidence of metabolic syndrome, type 2 diabetes, and cardiovascular events related to insulin resistance. As one of the target organs for insulin, adipose tissue is essential for maintaining in vivo immune homeostasis and metabolic regulation. Currently, the specific adipose tissue mechanisms involved in insulin resistance remain incompletely understood. There is increasing evidence that the process of insulin resistance is mostly accompanied by a dramatic increase in the number and phenotypic changes of adipose tissue macrophages (ATMs). In this review, we discuss the origins and functions of ATMs, some regulatory factors of ATM phenotypes, and the mechanisms through which ATMs mediate insulin resistance. We explore how ATM phenotypes contribute to insulin resistance in adipose tissue. We expect that modulation of ATM phenotypes will provide a novel strategy for the treatment of diseases associated with insulin resistance.
- MeSH
- diabetes mellitus 2. typu * metabolismus MeSH
- inzulinová rezistence * fyziologie MeSH
- lidé MeSH
- makrofágy metabolismus MeSH
- tuková tkáň metabolismus MeSH
- zánět metabolismus MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
- přehledy MeSH
BACKGROUND: COVID-19, an infectious disease caused by SARS-CoV-2, was shown to be associated with an increased risk of new-onset diabetes. Mechanisms contributing to the development of hyperglycemia are still unclear. We aimed to study whether hyperglycemia is related to insulin resistance and/or beta cell dysfunction. MATERIALS AND METHODS: Survivors of severe COVID-19 but without a known history of diabetes were examined at baseline (T0) and after 3 (T3) and 6 (T6) months: corticosteroids use, indirect calorimetry, and OGTT. Insulin response and sensitivity (IS) were expressed as insulinogenic (IGI), disposition (DI), and Matsuda insulin sensitivity index (ISI). Resting energy expenditure (REE) and respiratory quotient (RQ) was calculated from the gas exchange and nitrogen losses. RESULTS: 26 patients (out of 37) with complete outcome data were included in the analysis (age ~59.0 years; BMI ~ 30.4, 35% women). Patients were hypermetabolic at T0 (30.3 ± 4.0 kcal/kg lean mass/day, ~120% predicted) but REE declined over 6 months (ΔT6-T0 mean dif. T6-T0 (95% CI): -5.4 (-6.8, -4.1) kcal/kg FFM/day, p < 0.0001). 17 patients at T0 and 13 patients at T6 had hyperglycemia. None of the patients had positive islet autoantibodies. Insulin sensitivity in T0 was similarly low in hyperglycemic (H) and normoglycemic patients (N) (T0 ISIH = 3.12 ± 1.23, ISIN = 3.47 ± 1.78, p = 0.44), whereas insulin response was lower in the H group (DIH = 3.05 ± 1.79 vs DIN = 8.40 ± 5.42, p = 0.003). Over 6 months ISI (ΔT6-T0 mean dif. T6-T0 for ISI (95% CI): 1.84 (0.45, 3.24), p = 0.01)) increased in the H group only. CONCLUSIONS: Patients with severe COVID-19 had increased REE and insulin resistance during the acute phase due to the infection and corticosteroid use, but these effects do not persist during the follow-up period. Only patients with insufficient insulin response developed hyperglycemia, indicating that beta cell dysfunction, rather than insulin resistance, was responsible for its occurrence.
- MeSH
- COVID-19 * komplikace MeSH
- hyperglykemie * MeSH
- inzulin MeSH
- inzulinová rezistence * fyziologie MeSH
- krevní glukóza MeSH
- lidé středního věku MeSH
- lidé MeSH
- prospektivní studie MeSH
- SARS-CoV-2 MeSH
- Check Tag
- lidé středního věku MeSH
- lidé MeSH
- mužské pohlaví MeSH
- ženské pohlaví MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
Natural compounds may bear promising therapeutic benefits against metabolic diseases such as type 2 diabetes mellitus (T2DM), which are characterized by a state of insulin resistance and mitochondrial dysfunction. Here, we examined the cellular mechanisms by which aspalathin, a dihydrochalcone C-glucoside unique to rooibos, may ameliorate palmitate-induced insulin resistance and mitochondrial dysfunction in cultured C2C12 myotubules. This current study demonstrated that aspalathin remains effective in improving glucose uptake in insulin-resistant skeletal muscle cells, supported by the upregulation of insulin-dependent signaling that involves the activation of insulin receptor (IR) and direct phosphorylation of protein kinase B (AKT). Interestingly, aspalathin also improved mitochondrial respiration and function, which was evident by an increased expression of carnitine palmitoyltransferase 1 (Cpt1), fatty acid transport protein 1 (Fatp1), sirtuin 1 (Sirt1), nuclear respiratory factor 1 (Nrf1), and transcription factor A, mitochondrial (Tfam). Importantly, our results showed that aspalathin treatment was effective in ameliorating the devastating outcomes of insulin resistance and mitochondrial dysfunction that are linked with an undesired pro-inflammatory response, by reducing the levels of well-known pro-inflammatory markers such as interleukin-6 (IL-6), tumor necrosis factor-alpha (TNF-alpha), and protein kinase C-theta (PKC-theta). Thus, beyond improving glucose uptake and insulin signaling, the current study brings a new perspective in the therapeutic benefits of aspalathin in improving mitochondrial respiration and blocking inflammation to attenuate the detrimental effect of palmitate in skeletal muscle cells.
- MeSH
- diabetes mellitus 2. typu * metabolismus MeSH
- glukosa metabolismus MeSH
- inzulin farmakologie MeSH
- inzulinová rezistence * fyziologie MeSH
- kosterní svalová vlákna metabolismus MeSH
- kosterní svaly metabolismus MeSH
- lidé MeSH
- mitochondrie metabolismus MeSH
- palmitany MeSH
- Check Tag
- lidé MeSH
- Publikační typ
- časopisecké články MeSH
BACKGROUND: If menopause is really independent risk factor for cardiovascular disease is still under debate. We studied if ovariectomy in the model of insulin resistance causes cardiovascular changes, to what extent are these changes reversible by estradiol substitution and if they are accompanied by changes in other organs and tissues. METHODS: Hereditary hypertriglyceridemic female rats were divided into three groups: ovariectomized at 8th week (n = 6), ovariectomized with 17-β estradiol substitution (n = 6), and the sham group (n = 5). The strain of abdominal aorta measured by ultrasound, expression of vascular genes, weight and content of myocardium and also non-cardiac parameters were analyzed. RESULTS: After ovariectomy, the strain of abdominal aorta, expression of nitric oxide synthase in abdominal aorta, relative weight of myocardium and of the left ventricle and circulating interleukin-6 decreased; these changes were reversed by estradiol substitution. Interestingly, the content of triglycerides in myocardium did not change after ovariectomy, but significantly increased after estradiol substitution while adiposity index did not change after ovariectomy, but significantly decreased after estradiol substitution. CONCLUSION: Vascular and cardiac parameters under study differed in their response to ovariectomy and estradiol substitution. This indicates different effects of ovariectomy and estradiol on different cardiovascular but also extracardiac structures.
