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1.
Bull Exp Biol Med ; 177(4): 406-411, 2024 Aug.
Article de Anglais | MEDLINE | ID: mdl-39259466

RÉSUMÉ

The dynamics of nephropathy development in rats with type 2 diabetes mellitus, caused by a high-fat diet and the streptozotocin administration (25 mg/kg), and metabolic syndrome, caused by addition of 20% fructose solution to the diet, was evaluated during the experiment. Models with moderate severity of metabolic changes without significant changes in body weight were obtained after 24 weeks. To study neuropathy severity, the method of electroneuromyography was used; the velocities of motor and sensory excitation propagation along the caudal nerve fibers were measured. In modeled diabetes mellitus against the background of hyperglycemia, a marked decrease in motor and sensory propagation rates was observed, and an increase in the response durations was noted from week 12 to week 24, indicating pronounced neuropathy. In the fructose model, the motor response duration increased from week 12, which possibly indicates the development of peripheral neuropathy.


Sujet(s)
Diabète expérimental , Neuropathies diabétiques , Syndrome métabolique X , Streptozocine , Animaux , Syndrome métabolique X/métabolisme , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/anatomopathologie , Rats , Diabète expérimental/physiopathologie , Diabète expérimental/complications , Diabète expérimental/métabolisme , Mâle , Neuropathies diabétiques/physiopathologie , Neuropathies diabétiques/anatomopathologie , Neuropathies diabétiques/étiologie , Neuropathies diabétiques/métabolisme , Streptozocine/toxicité , Diabète de type 2/physiopathologie , Diabète de type 2/complications , Diabète de type 2/métabolisme , Rat Wistar , Fructose , Alimentation riche en graisse/effets indésirables , Neuropathies périphériques/physiopathologie , Neuropathies périphériques/anatomopathologie , Neuropathies périphériques/étiologie , Modèles animaux de maladie humaine , Conduction nerveuse/physiologie
3.
Adv Exp Med Biol ; 1460: 231-272, 2024.
Article de Anglais | MEDLINE | ID: mdl-39287854

RÉSUMÉ

The adipose tissue organ is organised as distinct anatomical depots located all along the body axis, and it is constituted of three different types of adipocytes: white, beige and brown, which are integrated with vascular, immune, neural, and extracellular stroma cells. These distinct adipocytes serve different specialised functions. The main function of white adipocytes is to ensure healthy storage of excess nutrients/energy and its rapid mobilisation to supply the demand of energy imposed by physiological cues in other organs, whereas brown and beige adipocytes are designed for heat production through uncoupling lipid oxidation from energy production. The concerted action of the three types of adipocytes/tissues ensures an optimal metabolic status. However, when one or several of these adipose depots become dysfunctional because of sustained lipid/nutrient overload, then insulin resistance and associated metabolic complications ensue. These metabolic alterations close a vicious cycle that negatively affects the adipose tissue functionality and compromises global metabolic homeostasis. Optimising white adipose tissue expandability and ensuring its functional metabolic flexibility and/or promoting brown/beige mediated thermogenic activity are complementary strategies that counteract obesity and its associated lipotoxic metabolic effects. However, the development of these therapeutic approaches requires a deep understanding of adipose tissue in all broad aspects. In this chapter, we will discuss the characteristics of the different adipose tissue depots with respect to origins and precursors recruitment, plasticity, cellular composition, and expandability capacity potential as well as molecular and metabolic characteristic signatures in both physiological and pathophysiological conditions. Current antilipotoxic strategies for future clinical application are also discussed in this chapter.


Sujet(s)
Tissu adipeux , Syndrome métabolique X , Humains , Syndrome métabolique X/métabolisme , Syndrome métabolique X/anatomopathologie , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/étiologie , Animaux , Tissu adipeux/métabolisme , Tissu adipeux/anatomopathologie , Métabolisme lipidique , Obésité/métabolisme , Obésité/anatomopathologie , Obésité/physiopathologie , Insulinorésistance , Métabolisme énergétique , Thermogenèse , Tissu adipeux blanc/métabolisme , Tissu adipeux blanc/anatomopathologie
4.
PLoS One ; 19(9): e0308421, 2024.
Article de Anglais | MEDLINE | ID: mdl-39241047

RÉSUMÉ

BACKGROUND: Metabolic Syndrome (MetS) increases the risk of other serious health problems, particularly cardiovascular diseases and stroke. Sensory processing patterns (SPPs) are internal factors shaping behaviors and emotions, both healthy and unhealthy. There is a lack of studies directly examining the relationship between the SPPs and metabolic risk factors. METHOD: This study aimed to investigate SPPs and their association with metabolic risk factors in individuals with metabolic syndrome (MetS). One hundred and seventeen individuals with MetS completed questionnaires on demographic characteristics and the Thai Sensory Patterns Assessment-adult version. Data on metabolic risk factors, including fasting blood glucose, blood pressure, and waist circumference, were collected. RESULTS: The findings revealed high arousal levels in proprioceptive and auditory senses among the participants. The fasting blood glucose was significantly correlated with a preference in the tactile sense (r = -0.150, P<0.05), while waist circumference was associated with arousal level in the auditory and smell-taste senses (r = 0.140, -0.160, P<0.05). Moreover, the GLMM revealed that fasting blood glucose was associated with preferences in tactile, vestibular, and proprioceptive senses (r = -0.481, 0.726, -0.386, P<0.05). Furthermore, diastolic blood pressure was associated with preferences in vestibular sense (r = 0.099; P<0.05). CONCLUSION: The SPPs might be related to metabolic risk factors, so it is important to recognize how individual SPPs relate to metabolic risk factors. However, further studies using a larger sample may be needed to deeply explore the mechanisms underlying these associations.


Sujet(s)
Syndrome métabolique X , Humains , Syndrome métabolique X/physiopathologie , Mâle , Femelle , Adulte d'âge moyen , Études transversales , Facteurs de risque , Adulte , Glycémie/métabolisme , Sujet âgé , Vie autonome , Pression sanguine , Tour de taille , Enquêtes et questionnaires
5.
Cardiovasc Diabetol ; 23(1): 315, 2024 Aug 27.
Article de Anglais | MEDLINE | ID: mdl-39192263

RÉSUMÉ

BACKGROUND: Insulin resistance is a frequent precursor of typical obesity and metabolic syndrome complications. However, accurate diagnosis remains elusive because of its pathophysiological complexity and heterogeneity. Herein, we have explored the utility of insulin secretion dynamics in response to an oral glucose tolerance test as a surrogate marker to identify distinct metabotypes of disease severity. METHODS: The study population consisted of children with obesity and insulin resistance, stratified according to the post-challenge insulin peak timing (i.e., early, middle, and late peak), from whom fasting and postprandial plasma and erythrocytes were collected for metabolomics analysis. RESULTS: Children with late insulin peak manifested worse cardiometabolic health (i.e., higher blood pressure, glycemia, and HOMA-IR scores) than early responders. These subjects also showed more pronounced changes in metabolites mirroring failures in energy homeostasis, oxidative stress, metabolism of cholesterol and phospholipids, and adherence to unhealthy dietary habits. Furthermore, delayed insulin peak was associated with impaired metabolic flexibility, as reflected in compromised capacity to regulate mitochondrial energy pathways and the antioxidant defense in response to glucose overload. CONCLUSIONS: Altogether, these findings suggest that insulin resistance could encompass several phenotypic subtypes characterized by graded disturbances in distinctive metabolic derangements occurring in childhood obesity, which serve as severity predictive markers.


Sujet(s)
Marqueurs biologiques , Glycémie , Hyperglycémie provoquée , Insulinorésistance , Insuline , Syndrome métabolique X , Métabolomique , Obésité pédiatrique , Indice de gravité de la maladie , Humains , Syndrome métabolique X/diagnostic , Syndrome métabolique X/sang , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/épidémiologie , Enfant , Mâle , Femelle , Obésité pédiatrique/diagnostic , Obésité pédiatrique/sang , Obésité pédiatrique/physiopathologie , Obésité pédiatrique/épidémiologie , Adolescent , Insuline/sang , Glycémie/métabolisme , Marqueurs biologiques/sang , Phénotype , Facteurs âges , Facteurs temps , Valeur prédictive des tests , Sécrétion d'insuline , Période post-prandiale , Métabolisme énergétique
6.
Cardiovasc Diabetol ; 23(1): 302, 2024 Aug 16.
Article de Anglais | MEDLINE | ID: mdl-39152431

RÉSUMÉ

BACKGROUND: The binary diagnosis of Metabolic Syndrome(MetS) fails to accurately evaluate its severity, and the association between MetS severity and frailty progression remains inadequately elucidated. This study aims to clarify the relationship between the severity of MetS and the progression of frailty among the middle-aged and elderly population in China. METHOD: Participants from the 2011-2018 China Health and Retirement Longitudinal Study(CHARLS) were included for a longitudinal analysis. The study employs a frailty index(FI) based on 32 health deficits to diagnose frailty and to assess FI trajectories. An age-sex-ethnicity-specific MetS scoring model (MetS score) was used to assess metabolic syndrome severity in Chinese adults. The Cumulative MetS score from 2012 to 2015 was calculated using the formula: (MetS score in wave 1 + MetS score in wave 3) / 2 × time(2015 - 2012). The association between MetS score, Cumulative MetS score, and the risk and trajectory of frailty were evaluated using Cox regression/logistic regression, and linear mixed models. Restricted Cubic Splines(RCS) models were utilized to detect potential non-linear associations. RESULTS: A higher MetS score was significantly associated with an increased risk of frailty(HR per 1 SD increase = 1.205; 95%CI: 1.14 to 1.273) and an accelerated FI trajectory(ß per 1 SD increase = 0.113 per year; 95%CI: 0.075 to 0.15 per year). Evaluating changes in MetS score using a Cumulative MetS score indicated that each 1 SD increase in the Cumulative MetS score increased the risk of frailty by 22.2%(OR = 1.222; 95%CI: 1.133 to 1.319) and accelerated the rate of increase in FI(ß = 0.098 per year; 95%CI: 0.058 to 0.138 per year). RCS model results demonstrated a dose-response curve relationship between MetS score and Cumulative MetS score with frailty risk. Stratified analysis showed consistency across subgroups. The interaction results indicate that in males and individuals under aged 60, MetS score may accelerate the increase in FI, a finding consistent across both models. CONCLUSIONS: Our findings underscore the positive correlation between the severity of MetS and frailty progression in the middle-aged and elderly, highlighting the urgent need for early identification of MetS and targeted interventions to reduce the risk of frailty.


Sujet(s)
Évolution de la maladie , Personne âgée fragile , Fragilité , Évaluation gériatrique , Syndrome métabolique X , Indice de gravité de la maladie , Humains , Syndrome métabolique X/épidémiologie , Syndrome métabolique X/diagnostic , Syndrome métabolique X/physiopathologie , Fragilité/diagnostic , Fragilité/épidémiologie , Fragilité/physiopathologie , Mâle , Femelle , Études longitudinales , Chine/épidémiologie , Sujet âgé , Adulte d'âge moyen , Appréciation des risques , Facteurs de risque , Facteurs âges , Facteurs temps , Sujet âgé de 80 ans ou plus , Pronostic , Peuples d'Asie de l'Est
7.
Nat Rev Rheumatol ; 20(9): 565-584, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-39112603

RÉSUMÉ

Obesity has a pivotal and multifaceted role in pain associated with osteoarthritis (OA), extending beyond the mechanistic influence of BMI. It exerts its effects both directly and indirectly through various modifiable risk factors associated with OA-related pain. Adipose tissue dysfunction is highly involved in OA-related pain through local and systemic inflammation, immune dysfunction, and the production of pro-inflammatory cytokines and adipokines. Adipose tissue dysfunction is intricately connected with metabolic syndrome, which independently exerts specific effects on OA-related pain, distinct from its association with BMI. The interplay among obesity, adipose tissue dysfunction and metabolic syndrome influences OA-related pain through diverse pain mechanisms, including nociceptive pain, peripheral sensitization and central sensitization. These complex interactions contribute to the heightened pain experience observed in individuals with OA and obesity. In addition, pain management strategies are less efficient in individuals with obesity. Importantly, therapeutic interventions targeting obesity and metabolic syndrome hold promise in managing OA-related pain. A deeper understanding of the intricate relationship between obesity, metabolic syndrome and OA-related pain is crucial and could have important implications for improving pain management and developing innovative therapeutic options in OA.


Sujet(s)
Tissu adipeux , Syndrome métabolique X , Obésité , Arthrose , Humains , Obésité/complications , Obésité/physiopathologie , Arthrose/physiopathologie , Arthrose/complications , Tissu adipeux/physiopathologie , Tissu adipeux/métabolisme , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/complications , Douleur/physiopathologie , Gestion de la douleur/méthodes
8.
J Electrocardiol ; 86: 153755, 2024.
Article de Anglais | MEDLINE | ID: mdl-38997874

RÉSUMÉ

BACKGROUND: Currently, there is a lack of research on the Tp-Te interval and Tp-e/QT ratio in obese adolescents who have metabolic syndrome. AIM: Our study aims to compare established ventricular repolarization parameters with these intervals and ratios in obese adolescents with or without metabolic syndrome, alongside a healthy control group, while exploring the association of these repolarization parameters with cardiovascular risk factors and echocardiographic variables. METHODS: The study included 100 obese adolescents and 50 lean subjects, with the obese participants categorized into two subgroups. The Tp-Te interval was identified as the duration from the peak to the end of the T wave. RESULTS: The metabolic and non-metabolic syndrome obese groups exhibited significantly elevated QTc and TpTe values compared to the control group, with no statistically significant differences observed in minimum QT, maximum QT, QT dispersion, QTc dispersion, TpTe dispersion, and TpTe/QT ratio values among obese subjects with metabolic or non-metabolic syndrome and controls. Specifically, TpTe values were significantly elevated in the non-metabolic syndrome obese groups compared to controls, while minimum TpTe values were significantly elevated in the metabolic syndrome obese groups compared to controls, and the prolongation of the QTc interval was notably elevated in the obese groups than in controls. CONCLUSIONS: Obese adolescents demonstrated an elevated TpTe interval compared to healthy controls, without any significant differences observed in TpTe dispersion, and TpTe/QT ratio values between the two groups. Results of our study showed that a negative correlation between TpTe and HDL-cholesterol and a positive correlation between the TpTe/QT ratio and insulin sensitivity indices in adolescents with metabolic syndrome.


Sujet(s)
Électrocardiographie , Syndrome métabolique X , Obésité pédiatrique , Humains , Adolescent , Mâle , Femelle , Syndrome métabolique X/physiopathologie , Obésité pédiatrique/physiopathologie , Obésité pédiatrique/complications , Échocardiographie , Études cas-témoins
9.
Trials ; 25(1): 497, 2024 Jul 22.
Article de Anglais | MEDLINE | ID: mdl-39039602

RÉSUMÉ

BACKGROUND: Time-restricted eating (TRE) has been shown to be associated with improvements in some aspects of the metabolic syndrome. Nevertheless, only a few studies have addressed the effect of TRE on pulse wave velocity (PWV). We thus propose a randomized controlled trial to compare the effects of TRE with standard dietary advice on PWV and thereby present the protocol. METHODS: Forty-eight participants will be assigned to either TRE or control groups using simple randomization. The TRE group will consume their meals during a 10-h period and experience 14 h of fasting. They will also be advised to consume their last meal no later than 20:00. Both groups will receive standard dietary advice. The participants will be followed for 6 weeks. The primary outcome will be changes in PWV. Laboratory measurements, including lipid profile, liver enzyme tests, fasting blood glucose (FBG), insulin concentrations, and insulin resistance, as well as anthropometric data, blood pressure, basal metabolic rate, appetite status, physical activity level, sleep quality, cognitive function, quality of life, and calorie intake, will be evaluated throughout the study. DISCUSSION: The outcomes of this study will allow a comparison of the effects of TRE and standard dietary recommendations on PWV and other cardiometabolic factors in individuals with metabolic syndrome (MetS). TRIAL REGISTRATION: Iranian Registry of Clinical Trials; code: IRCT20201230049889N1; registered on August 14, 2022. The registration of the trial is accessible at: https://www.IRCT.ir/trial/64485?revision=281341 .


Sujet(s)
Jeûne , Syndrome métabolique X , Analyse de l'onde de pouls , Essais contrôlés randomisés comme sujet , Rigidité vasculaire , Humains , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/diétothérapie , Syndrome métabolique X/sang , Mâle , Adulte d'âge moyen , Adulte , Facteurs temps , Résultat thérapeutique , Iran , Glycémie/métabolisme
10.
Medicina (Kaunas) ; 60(7)2024 Jun 30.
Article de Anglais | MEDLINE | ID: mdl-39064509

RÉSUMÉ

Background and Objectives: The thyroid is a key endocrine gland for the regulation of metabolic processes. A body composition analysis (BCA) is a valuable complement to the assessment of body mass index, which is derived only from body weight and height. This cross-sectional retrospective study aimed to investigate the relationships between thyroid volume (TV) and thyroid function parameters, anthropometric measurements, BCA parameters, and the presence of metabolic syndrome (MetS) in adults without clinically overt thyroid disease. Material and Methods: This study involved 45 people (females: 57.8%; MetS: 28.9%) hospitalized for planned diagnostics without signs of acute illness or a deterioration of their health and without thyroid disease, who underwent thyroid ultrasound scans, biochemical tests to assess their thyroid function, MetS assessments, anthropometric measurements, and BCAs using the bioelectrical impedance method. Results: The TV was significantly larger in people with MetS compared to people without MetS. The TV was significantly higher and the serum thyrotropin (TSH) concentration was significantly lower in overweight and obese people than in normal and underweight people. The free triiodothyronine (FT3) serum concentration and TV were correlated with waist circumference and some parameters of the BCA, and the FT3 concentration was also correlated with the body mass index, waist-hip ratio, and waist-height ratio. No significant correlations were found between the FT4 and TSH and the results of the anthropometric and BCA measurements. Conclusions: Even in a population of euthyroid patients without clinically overt thyroid disease, there were some significant relationships between the volume and function of the thyroid gland and the results of their anthropometric parameters, BCAs, and the presence of MetS features.


Sujet(s)
Anthropométrie , Composition corporelle , Indice de masse corporelle , Syndrome métabolique X , Glande thyroide , Humains , Études transversales , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/sang , Syndrome métabolique X/diagnostic , Mâle , Femelle , Études rétrospectives , Glande thyroide/imagerie diagnostique , Glande thyroide/physiopathologie , Glande thyroide/physiologie , Adulte d'âge moyen , Composition corporelle/physiologie , Adulte , Anthropométrie/méthodes , Sujet âgé , Adolescent , Tri-iodothyronine/sang , Tri-iodothyronine/analyse , Thyréostimuline/sang , Thyréostimuline/analyse
11.
Ther Umsch ; 81(3): 90-94, 2024 Jun.
Article de Allemand | MEDLINE | ID: mdl-38984933

RÉSUMÉ

INTRODUCTION: The prevalence of overweight and obesity has increased dramatically. At the same time, lack of sleep has become a part of the modern lifestyle, as well as shift and night work. As a result, chronodisruption, i. e. a change in physiological processes that are controlled by the internal clock, becomes commonplace. Epidemiological data show that too short but also too long sleep are associated with an increased risk of obesity, also seen for night shift work. Overweight and obesity are associated with metabolic syndrome and data likewise report an increased risk by both short and long sleep. It has not yet been conclusively clarified how chronodisruption influences the metabolic risks. Clinical experimental studies report on neuroendocrine and circadian mechanisms and it has been shown that lack of sleep increases the hunger-promoting hormone ghrelin as well as subjective feelings of hunger and increases leptin levels. Lack of sleep also increases hedonic hunger and food-related reward signals. Through preventive measures, chronodisruption and thus, the risk of obesity can be counteracted. The extent to which smartwatches and fitness trackers, which according to the manufacturer can measure and analyze sleep, provide an objective picture of sleep has not been sufficiently investigated. However, smartwatches and fitness trackers can - probably - increase awareness of sleep in the modern society.


Sujet(s)
Obésité , Humains , Obésité/physiopathologie , Privation de sommeil/physiopathologie , Rythme circadien/physiologie , Syndrome métabolique X/physiopathologie , Métabolisme énergétique/physiologie , Poids/physiologie , Facteurs de risque , Horaire de travail posté/effets indésirables , Troubles du rythme circadien du sommeil/physiopathologie
12.
Physiol Rep ; 12(13): e16126, 2024 Jul.
Article de Anglais | MEDLINE | ID: mdl-39001594

RÉSUMÉ

Molecular mechanisms associated to improvement of metabolic syndrome (MetS) during exercise are not fully elucidated. MetS was induced in 250 g male Wistar rats by 30% sucrose in drinking water. Control rats receiving tap water were controls, both groups received solid standard diet. After 14 weeks, an endurance exercised group, and a sedentary were formed for 8 weeks. The soleus and extensor digitorum longus (EDL) muscles were dissected to determine contractile performance, expression of myosin heavy chain isoforms, PGC1α, AMPKα2, NFATC1, MEF2a, SIX1, EYA1, FOXO1, key metabolic enzymes activities. Exercise mildly improved MetS features. MetS didn't alter the contractile performance of the muscles. Exercise didn't altered expression of PGC1α, NFATC1, SIX1 and EYA1 on MetS EDL whereas NFATC1 increased in soleus. Only citrate synthase was affected by MetS on the EDL and this was partially reverted by exercise. Soleus α-ketoglutarate dehydrogenase activity was increased by exercise but MetS rendered the muscle resistant to this effect. MetS affects mostly the EDL muscle, and endurance exercise only partially reverts this. Soleus muscle seems more resilient to MetS. We highlight the importance of studying both muscles during MetS, and their metabolic remodeling on the development and treatment of MetS by exercise.


Sujet(s)
Métabolisme énergétique , Syndrome métabolique X , Conditionnement physique d'animal , Rat Wistar , Animaux , Mâle , Syndrome métabolique X/métabolisme , Syndrome métabolique X/physiopathologie , Rats , Muscles squelettiques/métabolisme , Saccharose/métabolisme , Saccharose/administration et posologie , Fibres musculaires squelettiques/métabolisme , Contraction musculaire , Phénotype
13.
Am J Physiol Cell Physiol ; 327(3): C698-C715, 2024 Sep 01.
Article de Anglais | MEDLINE | ID: mdl-38946422

RÉSUMÉ

Type 2 diabetes (T2D) constitutes a major public health problem, and despite prevention efforts, this pandemic disease is one of the deadliest diseases in the world. In 2022, 6.7 million patients with T2D died prematurely from vascular complications. Indeed, diabetes increases the risk of myocardial infarction or stroke eightfold. The identification of the molecular factors involved in the occurrence of cardiovascular complications and their prevention are therefore major axes. Our hypothesis is that factors brought into play during physiological aging appear prematurely with diabetes progression. Our study focused on the aging of the extracellular matrix (ECM), a major element in the maintenance of vascular homeostasis. We characterized the morphological and functional aspects of aorta, with a focus on the collagen and elastic fibers of diabetic mice aged from 6 mo to nondiabetic mice aged 6 mo and 20 mo. The comparison with the two nondiabetic models (young and old) highlighted an exacerbated activity of proteases, which could explain a disturbance in the collagen accumulation and an excessive degradation of elastic fibers. Moreover, the generation of circulating elastin-derived peptides reflects premature aging of the ECM. These extracellular elements contribute to the appearance of vascular rigidity, often the origin of pathologies such as hypertension and atherosclerosis. In conclusion, we show that diabetic mice aged 6 mo present the same characteristics of ECM wear as those observed in mice aged 20 mo. This accelerated aortic wall remodeling could then explain the early onset of cardiovascular diseases and, therefore, the premature death of patients with T2D.NEW & NOTEWORTHY Aortic elastic fibers of young (6-mo old) individuals with diabetes degrade prematurely and exhibit an appearance like that found in aged (20-mo old) nondiabetic mice. Exacerbated elastolysis and elastin-derived peptide production are characteristic elements, contributing to early aortic wall rigidity and hypertension development. Therefore, limiting this early aging could be a judicious therapeutic approach to reduce cardiovascular complications and premature death in patients with diabetes.


Sujet(s)
Aorte , Tissu élastique , Matrice extracellulaire , Syndrome métabolique X , Souris de lignée C57BL , Rigidité vasculaire , Animaux , Tissu élastique/métabolisme , Tissu élastique/anatomopathologie , Rigidité vasculaire/physiologie , Souris , Aorte/métabolisme , Aorte/anatomopathologie , Aorte/physiopathologie , Matrice extracellulaire/métabolisme , Matrice extracellulaire/anatomopathologie , Mâle , Syndrome métabolique X/métabolisme , Syndrome métabolique X/anatomopathologie , Syndrome métabolique X/physiopathologie , Élastine/métabolisme , Collagène/métabolisme , Diabète expérimental/métabolisme , Diabète expérimental/anatomopathologie , Diabète expérimental/physiopathologie , Vieillissement/anatomopathologie , Vieillissement/métabolisme , Diabète de type 2/métabolisme , Diabète de type 2/anatomopathologie , Diabète de type 2/physiopathologie , Vieillissement précoce/métabolisme , Vieillissement précoce/anatomopathologie , Vieillissement précoce/physiopathologie
14.
Diabetes Metab Res Rev ; 40(6): e3835, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-39081178

RÉSUMÉ

AIMS: To examine whether sublingual microcirculation can be used as an effective and noninvasive method for assessing cardiovascular, kidney, and metabolic risks in patients with type 2 diabetes mellitus (T2DM). MATERIALS AND METHODS: This cross-sectional observational study enrolled 186 patients with T2DM. All patients were evaluated using the Framingham General Cardiovascular Risk Score (FGCRS) and cardiovascular-kidney-metabolic (CKM) syndrome stage. Side-stream dark-field microscopy was used for sublingual microcirculation, including total and perfused vessel density (TVD and PVD). Multiple machine-learning prediction models have been developed for CKM risk and stage assessment in T2DM patients. Receiver operating characteristic (ROC) curves were generated to determine cutoff points. RESULTS: Compared to patients with T2DM, diabetic patients with subclinical atherosclerosis (SA) had a greater CV risk, as measured by the FGCRS, accompanied by markedly decreased microcirculation perfusion. Microcirculatory parameters (TVD and PVD), including carotid intima-media thickness (IMT), brachial-ankle pulse wave velocity (ba-PWV), and FGCRS, were closely associated with SA incidence. Microcirculatory parameters, Index (DMSA screen), and cut-off points were used to screen for SA in patients with T2DM. Furthermore, a new set of four factors identified through machine learning showed optimal sensitivity and specificity for detecting CKM risk in patients with T2DM. Decreased microcirculatory perfusion served as a useful early marker for CKM syndrome risk stratification in patients with T2DM without SA. CONCLUSIONS: Sublingual microcirculatory dysfunction is closely correlated with the risk of SA and CKM risk in T2DM patients. Sublingual microcirculation could be a novel tool for assessing the CKM syndrome stage in patients with T2DM.


Sujet(s)
Maladies cardiovasculaires , Diabète de type 2 , Apprentissage machine , Syndrome métabolique X , Microcirculation , Humains , Diabète de type 2/complications , Diabète de type 2/physiopathologie , Études transversales , Mâle , Femelle , Adulte d'âge moyen , Syndrome métabolique X/complications , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/diagnostic , Maladies cardiovasculaires/étiologie , Maladies cardiovasculaires/diagnostic , Plancher de la bouche/vascularisation , Sujet âgé , Appréciation des risques/méthodes , Pronostic , Facteurs de risque de maladie cardiaque , Études de suivi , Facteurs de risque , Épaisseur intima-média carotidienne
15.
J Smooth Muscle Res ; 60: 23-30, 2024.
Article de Anglais | MEDLINE | ID: mdl-39085088

RÉSUMÉ

Detrusor underactivity, a condition in which the bladder muscle does not contract strongly or long enough to empty the bladder completely or within the normal time frame, is a common cause of lower urinary tract symptoms in older individuals of both sexes. Although aging is a known risk factor for detrusor underactivity, its pathophysiological mechanisms are not fully understood. Therefore, establishing animal models that closely mimic the pathophysiology of detrusor underactivity in humans is necessary to elucidate these mechanisms. Metabolic syndrome is a cluster of several risk factors, including obesity, hyperlipidemia, hyperglycemia, and hypertension, which are associated with the development of diabetes, cardiovascular disease, and lower urinary tract dysfunction in both sexes. Notably, bladder dysfunction resulting from detrusor underactivity is observed at an earlier age in animal models with diabetes mellitus than in those without. Recently, detrusor underactivity-like phenotypes have been observed at a relatively early age in animal models with metabolic syndrome, involving obesity, hyperlipidemia, and hypertension, compared with those without. Therefore, this review introduces the association of detrusor underactivity with aging and metabolic syndrome, as well as possible pathophysiological mechanisms for detrusor underactivity from reports of various animal models. Notably, metabolic syndrome may accelerate the onset of age-related detrusor underactivity, and further analysis of old animal models with metabolic syndrome may help elucidate the pathogenesis of detrusor underactivity in humans.


Sujet(s)
Vieillissement , Modèles animaux de maladie humaine , Syndrome métabolique X , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/métabolisme , Syndrome métabolique X/complications , Animaux , Vieillissement/physiologie , Humains , Hypoactivité vésicale/physiopathologie , Hypoactivité vésicale/étiologie , Vessie urinaire/physiopathologie , Facteurs de risque , Mâle , Femelle
16.
Diabetes Obes Metab ; 26(10): 4147-4164, 2024 Oct.
Article de Anglais | MEDLINE | ID: mdl-39044309

RÉSUMÉ

Obesity has increased dramatically worldwide. Being overweight or obese can lead to various conditions, including dyslipidaemia, hypertension, glucose intolerance and metabolic syndrome (MetS), which may further lead to type 2 diabetes mellitus (T2DM). Previous studies have identified a link between ß-cell dysfunction and the severity of MetS, with multiple organs and tissues affected. Identifying the associations between pancreatic ß-cell dysfunction and organs is critical. Research has focused on the interaction between the liver, gut and pancreatic ß-cells. However, the mechanisms and related core targets are still not perfectly elucidated. The aims of this review were to summarize the mechanisms of ß-cell dysfunction and to explore the potential pathogenic pathways and targets that connect the liver, gut, adipose tissue, muscle, and brain to pancreatic ß-cell dysfunction.


Sujet(s)
Tissu adipeux , Diabète de type 2 , Cellules à insuline , Foie , Obésité , Humains , Cellules à insuline/physiologie , Cellules à insuline/métabolisme , Diabète de type 2/physiopathologie , Diabète de type 2/métabolisme , Tissu adipeux/métabolisme , Tissu adipeux/physiopathologie , Obésité/physiopathologie , Obésité/métabolisme , Obésité/complications , Foie/métabolisme , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/métabolisme , Encéphale/physiopathologie , Encéphale/métabolisme , Animaux , Muscles squelettiques/métabolisme , Muscles squelettiques/physiopathologie
17.
J Hum Hypertens ; 38(9): 655-662, 2024 Sep.
Article de Anglais | MEDLINE | ID: mdl-39020025

RÉSUMÉ

Previous research shows that exercise pressor and metaboreflex responses are significantly exaggerated in individuals with metabolic syndrome, but it is unclear if these exaggerated responses extend to the cold pressor test (CPT). This study tested the hypothesis that, contrary to previously reported exaggerated responses during exercise, CPT responses would not be significantly exaggerated in individuals with MetS compared to matched controls. Eleven individuals with MetS and eleven control participants matched by age, race, sex, and ethnicity completed a cardiometabolic prescreening and a CPT. Each CPT required participants to immerse their hand in ice water for two minutes while beat-by-beat blood pressure, heart rate (HR), and leg blood flow (LBF) were continuously measured. Leg vascular conductance (LVC) was calculated as LBF divided by mean arterial pressure (MAP). The precent changes in MAP, systolic blood pressure (SBP), diastolic blood pressure (DBP), HR, LBF, and LVC were compared across time (BL vs. Minutes 1 and 2 of CPT) and between groups (MetS vs. Control) using repeated measures analyses of variance. As expected, MAP (f = 32.11, p < 0.001), SBP (f = 23.18, p < 0.001), DBP (f = 40.39, p < 0.001), and HR (f = 31.81, p < 0.001) increased during the CPT, and LBF (f = 4.75, p = 0.014) and LVC (f = 13.88, p < 0.001) decreased. However, no significant main effects of group or group by time interactions were observed (f ≤ 0.391, p ≥ 0.539). These findings indicate that the hemodynamic responses to the CPT are not significantly exaggerated in MetS, and therefore, previous reports of exaggerated exercise pressor and metaboreflex responses in MetS cannot be attributed to generalized sympathetic overexcitability.


Sujet(s)
Basse température , Hémodynamique , Syndrome métabolique X , Humains , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/diagnostic , Syndrome métabolique X/ethnologie , Mâle , Femelle , Études cas-témoins , Adulte , Adulte d'âge moyen , Hémodynamique/physiologie , Rythme cardiaque , Pression sanguine/physiologie , Débit sanguin régional
18.
Stomatologiia (Mosk) ; 103(3): 31-38, 2024.
Article de Russe | MEDLINE | ID: mdl-38904557

RÉSUMÉ

OBJECTIVE: The aim of the study is comparative analysis of the condition of oral organs and tissues in people with metabolic syndrome (MS) of varying severity before orthopedic dental rehabilitation based on dental implants. MATERIAL AND METHODS: 255 patients (151 women and 104 men) aged from 35 to 65 years were examined. 3 groups were formed: 2 study groups and a comparison group. Groups 1 and 2 included individuals with excess body weight and MS. The control group consisted of 88 people without MS. An index assessment of the condition of the periodontium and tissue structures of the alveolar bone (according to cone-beam computed tomography), microcirculation in the gingival mucosa was carried out using laser Doppler flowmetry. RESULTS: The analysis of the periodontal condition indicators showed that in all groups of patients with MS, periodontal pathology occurred, the value of which was significantly higher than in patients of the control group (p <0.05). The analysis of bone tissue according to CBCT data showed that the most favorable conditions (type 1 and type 2 of bone according to Misch) for dental implantation are found in people without MS, respectively 3.5% and 35.1% of cases. The intensity of blood flow (σ) was 21.2% lower in group 1 and 48% in group 2, compared with the control group. Vasomotor activity (Kv) was 13.2% lower in the first group and 35% lower in the second group. A decrease in amplitudes in the area of all rhythms in the LDF gram was found: low-frequency - by 15.6%, high-frequency - by 16.9%, pulse - by 3.6%. CONCLUSION: Changes occurring in the organs and tissues of the mouth against the background of MS of varying severity lead to a decrease in tissue perfusion with blood and blood flow activity, a local decrease in bone density, and as a result, pathological changes in periodontal tissues. Before performing dental rehabilitation, it is necessary to take into account all the risks of possible complications caused by the general condition of organs and systems of people with MS.


Sujet(s)
Tomodensitométrie à faisceau conique , Syndrome métabolique X , Parodonte , Humains , Adulte d'âge moyen , Syndrome métabolique X/physiopathologie , Femelle , Mâle , Adulte , Sujet âgé , Parodonte/imagerie diagnostique , Parodonte/vascularisation , Parodonte/physiopathologie , Fluxmétrie laser Doppler , Microcirculation , Gencive/vascularisation , Gencive/imagerie diagnostique , Bouche/imagerie diagnostique , Bouche/physiopathologie
19.
J Assoc Physicians India ; 72(5): 17-20, 2024 May.
Article de Anglais | MEDLINE | ID: mdl-38881104

RÉSUMÉ

BACKGROUND: Metabolic syndrome (MS) has emerged as a new health risk, and its associated metabolic derangements have detrimental effects on the cardiovascular system. In recent years, MS has been reported to affect reproductive health in males. It has been reported to be associated with erectile dysfunction (ED) and has been attributed to be due to endothelial dysfunction. Poor endothelial function in ED usually affects small-sized vasculature, so it can be looked at as a predictor for the endothelial dysfunction of macro vasculature. The aim of the present study was to determine the association of ED in patients with MS and to determine its correlation with endothelial dysfunction. MATERIALS AND METHODS: It was a hospital-based case-control study in which 120 male patients with MS and 120 age-matched controls were enroled. Demographic profiles, anthropometry, past illnesses, and medical history of patients were obtained. MS was diagnosed according to the International Diabetes Federation (IDF) criteria and was measured using the flow-mediated dilation (FMD) method with the help of ultrasound used to assess endothelial dysfunction. Diagnosis of ED was based on the International Index of Erectile Function (IIEF) scale. RESULTS: The study participants had a mean age of 40.91 ± 11.41 years. The majority of cases (57.5%) had ≤6 months of history of MS. The prevalence of ED was 31.7% in cases compared to 5% in controls, thus showing a significant difference between cases and controls. Mean IIEF scores were significantly lower in cases (18.82 ± 5.59) compared to those in controls (23.00 ± 2.57). A moderate positive and significant correlation was observed between FMD and IIEF scores. With an increasing number of MS components, there was a significant increase in the prevalence of ED. Those with ED had significantly lower mean FMD values (5.1 ± 1.1%) compared to those not having ED (10.9 ± 3.3%). CONCLUSION: The findings of the present study showed that there is a significant association between ED and MS. We observed that the increase in components of MS increased the prevalence of ED in MS. Endothelial dysfunction measured by FMD was correlated with ED.


Sujet(s)
Endothélium vasculaire , Dysfonctionnement érectile , Syndrome métabolique X , Humains , Mâle , Syndrome métabolique X/épidémiologie , Syndrome métabolique X/physiopathologie , Syndrome métabolique X/complications , Endothélium vasculaire/physiopathologie , Adulte , Dysfonctionnement érectile/épidémiologie , Dysfonctionnement érectile/physiopathologie , Dysfonctionnement érectile/étiologie , Études cas-témoins , Inde/épidémiologie , Adulte d'âge moyen , Prévalence
20.
Adv Gerontol ; 37(1-2): 138-143, 2024.
Article de Russe | MEDLINE | ID: mdl-38944784

RÉSUMÉ

Metabolic syndrome is a group of disorders that are closely related to both the risk of developing type 2 diabetes mellitus and cardiovascular diseases, and generally leading to the phenomenon of premature aging of the body. Excessive accumulation of adipose tissue contributes to the development of chronic immune inflammation and oxidative stress, which are both precursors to various disorders, such as insulin resistance, arterial hypertension and dyslipidemia, but also trigger inflammatory processes in patients. An increasing number of studies support the importance of chronic immune inflammation in the pathogenesis of metabolic syndrome, as pro-inflammatory markers such as TNF-α, IL-1ß, IL-6, monocyte chemotactic protein-1 and growth of vascular endothelium. Among a wide range of cytokines, monocyte chemotactic protein-1 is considered one of the most important chemokines, which activates monocytes and other immune cells actively involved in inflammation. Another important point of chronic immune inflammation is its impact on the mental health of patients with metabolic syndrome. Increased levels of anxiety and depression are associated with levels of pro-inflammatory cytokines produced by adipose tissue, which ultimately has an adverse effect on the cognitive status of patients.


Sujet(s)
Marqueurs biologiques , Inflammation , Syndrome métabolique X , Humains , Syndrome métabolique X/métabolisme , Syndrome métabolique X/psychologie , Syndrome métabolique X/immunologie , Syndrome métabolique X/physiopathologie , Inflammation/métabolisme , Inflammation/immunologie , Inflammation/psychologie , Marqueurs biologiques/métabolisme , Marqueurs biologiques/sang , Sujet âgé , Cytokines/métabolisme , Cytokines/sang , Adulte d'âge moyen , Vieillissement/psychologie , Vieillissement/immunologie , Stress oxydatif/physiologie
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