RESUMEN
Several studies have demonstrated that diabetes mellitus can increase the risk of cardiovascular disease and remains the principal cause of death in these patients. Costameres connect the sarcolemma with the cytoskeleton and extracellular matrix, facilitating the transmission of mechanical forces and cell signaling. They are related to cardiac physiology because individual cardiac cells are connected by intercalated discs that synchronize muscle contraction. Diabetes impacts the nanomechanical properties of cardiomyocytes, resulting in increased cellular and left ventricular stiffness, as evidenced in clinical studies of these patients. The question of whether costameric proteins are affected by diabetes in the heart has not been studied. This work analyzes whether type 1 diabetes mellitus (T1DM) modifies the costameric proteins and coincidentally changes the cellular mechanics in the same cardiomyocytes. The samples were analyzed by immunotechniques using laser confocal microscopy. Significant statistical differences were found in the spatial arrangement of the costameric proteins. However, these differences are not due to their expression. Atomic force microscopy was used to compare intrinsic cellular stiffness between diabetic and normal cardiomyocytes and obtain the first elasticity map sections of diabetic living cardiomyocytes. Data obtained demonstrated that diabetic cardiomyocytes had higher stiffness than control. The present work shows experimental evidence that intracellular changes related to cell-cell and cell-extracellular matrix communication occur, which could be related to cardiac pathogenic mechanisms. These changes could contribute to alterations in the mechanical and electrical properties of cardiomyocytes and, consequently, to diabetic cardiomyopathy.NEW & NOTEWORTHY The structural organization of cardiomyocyte proteins is critical for their efficient functioning as a contractile unit in the heart. This work shows that diabetes mellitus induces significant changes in the spatial organization of costamere proteins, t tubules, and intercalated discs. We obtained the first elasticity map sections of living diabetic cardiomyocytes. The results show statistical differences in the map sections of diabetic and control cardiomyocytes, with diabetic cardiomyocytes being stiffer than normal ones.
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Miocitos Cardíacos , Miocitos Cardíacos/metabolismo , Miocitos Cardíacos/patología , Animales , Masculino , Costameras/metabolismo , Diabetes Mellitus Tipo 1/metabolismo , Diabetes Mellitus Tipo 1/patología , Diabetes Mellitus Tipo 1/fisiopatología , Ratas , Microscopía de Fuerza Atómica , Cardiomiopatías Diabéticas/metabolismo , Cardiomiopatías Diabéticas/patología , Cardiomiopatías Diabéticas/fisiopatología , Diabetes Mellitus Experimental/patología , Diabetes Mellitus Experimental/metabolismo , Ratas Wistar , ElasticidadRESUMEN
Type 1 diabetes mellitus (T1D) is associated with cognitive impairments in humans. A well-established animal model of T1D is induced through the administration of streptozotocin (STZ), a glucose analog that induces pancreatic ß-cell death, resulting in hyperglycemia and cognitive impairment linked to neuroinflammation and oxidative stress. Tumor necrosis factor (TNF)-α, a key inflammatory mediator, is elevated in the central nervous system (CNS) of diabetic animals. In this study, we utilized TNFR1 knockout mice to investigate the role of TNFR1 signaling in short-term T1D-related cognitive impairment. Our findings showed that diabetic animals did not develop cognitive damage within the first 2 weeks of T1D but exhibited reduced exploration in all behavioral tests. Our findings suggest that this reduction in exploration was attributable to motor impairment, as there was no reduction in motivated novelty-seeking behavior. Additionally, deletion of TNFR1 signaling attenuated gait speed impairment in diabetic mice, but did not affect other motor-related or exploratory behaviors.
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Diabetes Mellitus Experimental , Diabetes Mellitus Tipo 1 , Conducta Exploratoria , Locomoción , Ratones Noqueados , Motivación , Receptores Tipo I de Factores de Necrosis Tumoral , Animales , Diabetes Mellitus Tipo 1/fisiopatología , Diabetes Mellitus Tipo 1/metabolismo , Diabetes Mellitus Tipo 1/complicaciones , Receptores Tipo I de Factores de Necrosis Tumoral/metabolismo , Receptores Tipo I de Factores de Necrosis Tumoral/genética , Diabetes Mellitus Experimental/fisiopatología , Diabetes Mellitus Experimental/psicología , Motivación/fisiología , Conducta Exploratoria/fisiología , Masculino , Ratones , Locomoción/fisiología , Ratones Endogámicos C57BL , Disfunción Cognitiva/fisiopatología , Disfunción Cognitiva/etiología , EstreptozocinaRESUMEN
We aimed to investigate sex-related glycemic and cardiovascular responses after intensity- (moderate) and duration- (30 minutes) matched interval aerobic exercise (IAE) and continuous (CAE) aerobic exercise sessions in patients with type 1 diabetes mellitus (T1DM). A total of 19 volunteers (10 women) participated in 2 randomized and crossover sessions (1:1). Heart rate, systolic and diastolic blood pressure, double product, and blood glucose (BG) levels were measured before (PRE), immediately after (POST-0), and 20 minutes after (POST-20) each session. The rates of perceived exertion (RPE) and enjoyment levels (ELs) were assessed after each session. Generalized estimating equations were used to analyze the data (condition × time × sex). Regarding sex-related changes, men showed BG reductions at POST-0 and POST-20 after CAE (∆: -3.7 and -3.7 mmol/L, respectively) and only at POST-0 after IAE (∆: -1.6 mmol/L), with 1 episode of hypoglycemia occurring in the latter group. In contrast, women showed reduced BG values only after CAE at both time points (∆: -1.4 and -1.7 mmol/L) compared with PRE values. The decrease in BG levels at both time points was higher for men after CAE than IAE. Cardiovascular responses, RPEs, and ELs were similar between exercise sessions, except for blood pressure, which showed higher values in men. In conclusion, lower BG levels were observed after CAE, with greater reductions in men. Similar cardiovascular, RPE, and EL responses were found across sexes and sessions. Consideration of sex-specific recommendations may be warranted when prescribing aerobic exercise, particularly, for men with irregular physical activity levels.
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Glucemia , Presión Sanguínea , Estudios Cruzados , Diabetes Mellitus Tipo 1 , Ejercicio Físico , Frecuencia Cardíaca , Humanos , Diabetes Mellitus Tipo 1/sangre , Diabetes Mellitus Tipo 1/terapia , Diabetes Mellitus Tipo 1/fisiopatología , Masculino , Femenino , Glucemia/metabolismo , Adulto , Frecuencia Cardíaca/fisiología , Presión Sanguínea/fisiología , Ejercicio Físico/fisiología , Factores Sexuales , Adulto JovenRESUMEN
INTRODUCTION: Low cardiorespiratory fitness (CRF) increases the risk of cardiovascular disease by up to eightfold and is one of the strongest predictors of mortality. Some studies demonstrate impaired CRF in people living with type 1 and type 2 diabetes compared with those without diabetes, whereas others demonstrate no diabetes-associated impairment in CRF. PURPOSE: We aimed to determine whether diabetes can influence CRF and, if so, identify clinical associations underlying diabetes-associated exercise impairments. METHODS: Sixty-eight studies were included in the quantitative analysis. Standardized mean difference (SMD) was calculated and meta-analyses and meta-regressions were performed by using a random-effects model. RESULTS: Diabetes is associated with a large negative effect on CRF (SMD = -0.80, P < 0.001)-an effect that is partially mitigated, but still significant, in those with high physical activity levels (SMD = -0.50, P = 0.007). A sedentary lifestyle (SMD = -0.83, P = 0.007) and the presence of clinical complications related to diabetes (SMD = -1.66, P < 0.001) predict a greater magnitude of CRF reduction in people with diabetes compared with controls without diabetes. Both type 1 diabetes and type 2 diabetes are independently associated with impaired CRF compared with controls without diabetes; however, the effect is significantly greater in those type 2 diabetes (SMD = -0.97, P < 0.001). Meta-regression analysis demonstrates the effects of diabetes on CRF are primarily associated with HbA1c levels for type 1 diabetes ( B = -0.07, P < 0.001) and body mass index for type 2 diabetes ( B = -0.17, P = 0.005). CONCLUSIONS: These data demonstrate a negative influence of diabetes on the key risk factor of low CRF and provide critical insight into specific clinical markers of low CRF associated with diabetes.
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Capacidad Cardiovascular , Diabetes Mellitus Tipo 1 , Diabetes Mellitus Tipo 2 , Ejercicio Físico , Humanos , Diabetes Mellitus Tipo 2/fisiopatología , Diabetes Mellitus Tipo 2/complicaciones , Diabetes Mellitus Tipo 1/fisiopatología , Diabetes Mellitus Tipo 1/complicaciones , Ejercicio Físico/fisiología , Conducta SedentariaRESUMEN
BACKGROUND: This study evaluated tibia's macroscopic structure, mechanical properties, and bone microarchitecture in rats with type 1 diabetes mellitus (T1DM). METHODS: Eighteen animals were divided into three groups (n=6): Non-diabetic (ND), diabetic (D), and diabetic+insulin (DI). T1DM was induced by streptozotocin; insulin was administered daily (4IU). The animals were euthanized 35 days after induction. The tibiae were removed and analyzed using macroscopic, micro-computed tomography (micro-CT) and three-point bending. The macroscopic analysis measured proximal-distal length (PD), antero-posterior thickness (AP) of proximal (AP-P) and distal (AP-D) epiphysis, and lateral-medial thickness (LM) of proximal (LM-P) and distal (LM-D) epiphysis. Micro-CT analysis closed porosity, tissue mineral density, and cortical thickness. The three-point bending test measured maximum strength, energy, and stiffness. RESULTS: The macroscopic analysis showed that D presented smaller measures of length and thickness (AP and AP-P) than ND and DI. More extensive measurements were observed of LM and AP-D thickness in DI than in D. In micro-CT, DI showed larger cortical thickness than D. Mechanical analysis showed lower strength in D than in other groups. CONCLUSIONS: T1DM reduces bone growth and mechanical strength. Insulin therapy in diabetic rats improved bone growth and fracture resistance, making diabetic bone similar to normoglycemic animals.
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Densidad Ósea , Diabetes Mellitus Experimental , Diabetes Mellitus Tipo 1 , Hipoglucemiantes , Insulina , Tibia , Microtomografía por Rayos X , Animales , Tibia/diagnóstico por imagen , Tibia/efectos de los fármacos , Tibia/patología , Insulina/administración & dosificación , Insulina/uso terapéutico , Ratas , Diabetes Mellitus Tipo 1/tratamiento farmacológico , Diabetes Mellitus Tipo 1/complicaciones , Diabetes Mellitus Tipo 1/fisiopatología , Masculino , Densidad Ósea/efectos de los fármacos , Hipoglucemiantes/uso terapéutico , Ratas Wistar , Fenómenos BiomecánicosRESUMEN
Type 1 diabetes (T1D) arises from autoimmune-mediated destruction of insulin-producing ß-cells leading to impaired insulin secretion and hyperglycemia. T1D is accompanied by DNA damage, oxidative stress, and inflammation, although there is still scarce information about the oxidative stress response and DNA repair in T1D pathogenesis. We used the microarray method to assess mRNA expression profiles in peripheral blood mononuclear cells (PBMCs) of 19 T1D patients compared to 11 controls and identify mRNA targets of microRNAs that were previously reported for T1D patients. We found 277 differentially expressed genes (220 upregulated and 57 downregulated) in T1D patients compared to controls. Analysis by gene sets (GSA and GSEA) showed an upregulation of processes linked to ROS generation, oxidative stress, inflammation, cell death, ER stress, and DNA repair in T1D patients. Besides, genes related to oxidative stress responses and DNA repair (PTGS2, ATF3, FOSB, DUSP1, and TNFAIP3) were found to be targets of four microRNAs (hsa-miR-101, hsa-miR148a, hsa-miR-27b, and hsa-miR-424). The expression levels of these mRNAs and microRNAs were confirmed by qRT-PCR. Therefore, the present study on differential expression profiles indicates relevant biological functions related to oxidative stress response, DNA repair, inflammation, and apoptosis in PBMCs of T1D patients relative to controls. We also report new insights regarding microRNA-mRNA interactions, which may play important roles in the T1D pathogenesis.
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Diabetes Mellitus Tipo 1/tratamiento farmacológico , MicroARNs/farmacología , Adolescente , Adulto , Muerte Celular/efectos de los fármacos , Muerte Celular/genética , Reparación del ADN/efectos de los fármacos , Reparación del ADN/genética , Diabetes Mellitus Tipo 1/metabolismo , Diabetes Mellitus Tipo 1/fisiopatología , Femenino , Perfilación de la Expresión Génica/métodos , Perfilación de la Expresión Génica/estadística & datos numéricos , Humanos , Inflamación/tratamiento farmacológico , Inflamación/genética , Masculino , MicroARNs/metabolismo , MicroARNs/uso terapéutico , Estrés Oxidativo/efectos de los fármacos , Estrés Oxidativo/genética , Regulación hacia ArribaRESUMEN
Visuospatial working memory (VSWM) deficits have been demonstrated to occur during the development of type-1-diabetes (T1D). Despite confirming the early appearance of distinct task-related brain activation patterns in T1D patients compared to healthy controls, the effect of VSWM load on functional brain connectivity during task performance is still unknown. Using electroencephalographic methods, the present study evaluated this topic in clinically well-controlled T1D young patients and healthy individuals, while they performed a VSWM task with different memory load levels during two main VSWM processing phases: encoding and maintenance. The results showed a significantly lower number of correct responses and longer reaction times in T1D while performing the task. Besides, higher and progressively increasing functional connectivity indices were found for T1D patients in response to cumulative degrees of VSWM load, from the beginning of the VSWM encoding phase, without notably affecting the VSWM maintenance phase. In contrast, healthy controls managed to solve the task, showing lower functional brain connectivity during the initial VSWM processing steps with more gradual task-related adjustments. Present results suggest that T1D patients anticipate high VSWM load demands by early recruiting supplementary processing resources as the probable expression of a more inefficient, though paradoxically better adjusted to task demands cognitive strategy.
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Disfunción Cognitiva/fisiopatología , Conectoma , Complicaciones de la Diabetes/fisiopatología , Diabetes Mellitus Tipo 1/fisiopatología , Memoria a Corto Plazo/fisiología , Desempeño Psicomotor/fisiología , Adolescente , Adulto , Disfunción Cognitiva/etiología , Diabetes Mellitus Tipo 1/complicaciones , Electroencefalografía , Femenino , Humanos , Masculino , Percepción Espacial/fisiología , Percepción Visual/fisiología , Adulto JovenRESUMEN
BACKGROUND: Uncontrolled type 1 diabetes mellitus (T1D) impairs reproductive potential of males. Insulin treatment restores metabolic parameters but it is unclear how it protects male reproductive health. Herein, we hypothesized that insulin treatment to T1D rats protects testicular physiology by mediating mechanisms associated with apoptosis and cell cycle. METHODS: Mature male Wistar rats (n = 24) were divided into 3 groups: control, T1D-induced (received 40 mg kg-1 streptozotocin) and insulin-treated T1D (Ins T1D; received 40 mg kg-1 streptozotocin and then treated 0.9 IU/100 gr of insulin for 56 days) (N = 8/group). Expression levels of intrinsic apoptosis pathways regulators (Bcl-2, Bax, Caspase-3 and p53) and core regulators of cell cycle machinery (Cyclin D1, Cdk-4 and p21) were determined in testicular tissue by immunohistochemistry (IHC) and RT-PCR techniques. The percentage of testicular apoptotic cells was evaluated by TUNEL staining. RESULTS: Our data shows that insulin treatment to T1D rats restored (P < 0.05) T1D-induced increased of caspase-3 and p53 expression in testis. Moreover, the testis of T1D rats treated with insulin exhibited increased expression of Cyclin D1 and cdk-4, and a reduced expression of p21 when compared with the expression in testis of T1D rats. Finally, insulin treatment could fairly control T1D-induced apoptosis. Accordingly, treatment of T1D rats with insulin led to a remarkable reduction (p < 0.05) in the percentage of apoptotic cells in the testis. CONCLUSIONS: Insulin treatment is able to restore the network expression of apoptosis and proliferation-related genes caused by T1D in the testis and via this mechanism, preserve the fertility of males.
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Diabetes Mellitus Tipo 1/tratamiento farmacológico , Insulina/fisiología , Testículo/efectos de los fármacos , Animales , Apoptosis/efectos de los fármacos , Apoptosis/fisiología , Puntos de Control del Ciclo Celular/efectos de los fármacos , Proliferación Celular/efectos de los fármacos , Diabetes Mellitus Experimental/tratamiento farmacológico , Diabetes Mellitus Experimental/fisiopatología , Diabetes Mellitus Tipo 1/fisiopatología , Fertilidad , Expresión Génica/efectos de los fármacos , Masculino , Sustancias Protectoras/farmacología , Ratas Wistar , Recuento de Espermatozoides , Motilidad Espermática/efectos de los fármacos , Testículo/patología , Testosterona/sangreRESUMEN
INTRODUCCIÓN: La diabetes mellitus tipo 1 (DM1) es una enfermedad que se perfila para toda la vida. OBJETIVO: Identificar evidencia científica sobre el impacto de la DM1 en la calidad de vida de los adolescentes portadores de esta enfermedad. MÉTODO: Revisión sistemática en las bases bibliografías MEDLINE, LILACS, CINAHL y ScIELO, utilizando los descriptores "Adolescent*", "Teen*", "Diabe tes Mellitus, Type1", "Diabetes, type 1", "Type 1 diabetes", "Quality of life", "Health related quality of life", "Life quality", "Health impact assessment", "Health impact", "Impact assessment, health", "Diabetes Impact Measurement Scales", "PedsQL", "Glycated Hemoglobin A1c", "Glycosylated He moglobin A1c", y "HbA1c". De los 679 artículos localizados, 25 fueron incluidos en el análisis. Al gunos estudios fueron multicéntricos nacionales e internacionales. Los instrumentos más utilizados, relativos a las mediciones de la calidad de vida, fueron el Cuestionario de Calidad de Vida Pediátrica (PedsQL) en su versión genérica y módulo diabetes. RESULTADOS: La calidad de vida evaluada por el adolescente que padece DM1 mediante Escalas de calidad de vida, está significativamente e inversa mente asociada a los valores de HbA1c. Esta vinculación se extiende a una correlación significativa entre los puntajes genéricos totales de calidad de vida y HbA1c, pero no tiene la misma repercusión en los puntajes específicos. CONCLUSIONES: El control metabólico se establece como la piedra angular que incide en el impacto en la relación DM1 y calidad de vida; vinculación que se vislumbra como bidireccional, aunque no se evidencia un consenso absoluto sobre los tipos de factores y los grados que influirían en el control metabólico.
INTRODUCTION: Type 1 diabetes mellitus (DM1) is a chronic disease. OBJECTIVE: To identify scientific evidence on the impact of DM1 on the quality of life of adolescents with this disease. METHOD: Sys tematic review in the bibliographic databases MEDLINE, LILACS, CINAHL, and ScIELO, using the following descriptors: "Adolescent *", "Teen *", "Diabetes Mellitus, Type1", "Diabetes, type 1", "Type 1 diabetes", "Quality of life", "Health related quality of life", "Life quality", "Health impact assessment", "Health impact", "Impact assessment, health", "Diabetes Impact Measurement Scales", "PedsQL", "Glycated Hemoglobin A1c", "Glycosylated Hemoglobin A1c", and "HbA1c". Out of 679 articles identified, 25 were included in the analysis. Some studies were national and international multicenter. The most widely used instruments related to quality of life measurements were the Pediatric Quality of Life Questionnaire (PedsQL) in its generic version and the diabetes module. RESULTS: The quality of life assessed by the adolescent with DM1 using Quality of Life Scales is significantly and inversely associated with HbA1c values. This association includes a significant correlation between the total generic quality of life scores and HbA1c but does not have the same impact on specific sco res. CONCLUSIONS: Metabolic control appears to be the cornerstone that influences the impact on the bidirectional relationship between DM1 and quality of life, however, there is no absolute consensus on the types of factors and degrees that would influence metabolic control.
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Humanos , Adolescente , Calidad de Vida , Hemoglobina Glucada/metabolismo , Diabetes Mellitus Tipo 1/fisiopatología , Encuestas y CuestionariosRESUMEN
Diabetes can elicit direct deleterious effects on the myocardium, independent of coronary artery disease or hypertension. These cardiac disturbances are termed diabetic cardiomyopathy showing increased risk of heart failure with or without reduced ejection fraction. Presently, there is no specific treatment for this type of cardiomyopathy and in the case of type I diabetes, it may start in early childhood independent of glycemic control. We hypothesized that alterations in isolated myocyte contractility and cardiac function are present in the early stages of experimental diabetes in rats before overt changes in myocardium structure occur. Diabetes was induced by single-dose injection of streptozotocin (STZ) in rats with data collected from control and diabetic animals 3 weeks after injection. Left ventricle myocyte contractility was measured by single-cell length variation under electrical stimulation. Cardiac function and morphology were studied by high-resolution echocardiography with pulsed-wave tissue Doppler imaging (TDI) measurements and three-lead surface electrocardiogram. Triglycerides, cholesterol and liver enzyme levels were measured from plasma samples obtained from both groups. Myocardial collagen content and perivascular fibrosis of atria and ventricle were studied by histological analysis after picrosirius red staining. Diabetes resulted in altered contractility of isolated cardiac myocytes with increased contraction and relaxation time intervals. Echocardiography showed left atrium dilation, increased end-diastolic LV and posterior wall thickness, with reduced longitudinal systolic peak velocity (S') of the septum mitral annulus at the apical four-chamber view obtained by TDI. Triglycerides, aspartate aminotransferase and alkaline phosphatase were elevated in diabetic animals. Intertitial collagen content was higher in atria of both groups and did not differ among control and diabetic animals. Perivascular intramyocardial arterioles collagen did not differ between groups. These results suggest that alterations in cardiac function are present in the early phase in this model of diabetes type 1 and occur before overt changes in myocardium structure appear as evaluated by intersticial collagen deposition and perivascular fibrosis of intramyocardial arterioles.
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Diabetes Mellitus Tipo 1/fisiopatología , Cardiomiopatías Diabéticas/fisiopatología , Contracción Miocárdica , Miocitos Cardíacos/patología , Animales , Células Cultivadas , Diabetes Mellitus Tipo 1/inducido químicamente , Diabetes Mellitus Tipo 1/patología , Cardiomiopatías Diabéticas/inducido químicamente , Cardiomiopatías Diabéticas/patología , Ratas , EstreptozocinaRESUMEN
AIMS: To investigate the relationship of unawareness of hypoglycemia with spectral analysis of heart rate variability (HRV) and clinical variables in type 1 diabetes (T1D) individuals. METHODS: Participants with type 1 diabetes mellitus (type 1 diabetes) were prospectively assessed for hypoglycemia awareness using the Pedersen-Bjergaard method and were classified as normal hypoglycemia awareness, impaired hypoglycemia awareness and hypoglycemia unawareness. Indices of HRV in frequency domain were evaluated and Ewing tests were used for the diagnosis of cardiovascular autonomic neuropathy (CAN). RESULTS: Ninety-eight participants with T1D (mean age 26â¯years, average diabetes duration 13â¯years, and mean HbA1c 8.4%) were included in this study. The prevalence of hypoglycemia unawareness was 28%. No significant difference was observed on the prevalence of CAN among groups of different hypoglycemia awareness (pâ¯=â¯0.740). On regression analyses, abnormal results of HRV in frequency domain were not associated with unawareness of hypoglycemia. On univariable regression analysis, age, diabetes duration and estimated creatinine clearance were associated with unawareness of hypoglycemia. CONCLUSION: CAN as assessed by Ewing tests and spectral analysis of HRV is not associated with unawareness of hypoglycemia. There is association of age, diabetes duration and renal deficit with unawareness of hypoglycemia.
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Enfermedades del Sistema Nervioso Autónomo/diagnóstico , Concienciación , Diabetes Mellitus Tipo 1/complicaciones , Neuropatías Diabéticas/diagnóstico , Frecuencia Cardíaca/fisiología , Hipoglucemia/psicología , Adolescente , Adulto , Enfermedades del Sistema Nervioso Autónomo/etiología , Enfermedades del Sistema Nervioso Autónomo/psicología , Diabetes Mellitus Tipo 1/fisiopatología , Diabetes Mellitus Tipo 1/psicología , Neuropatías Diabéticas/etiología , Neuropatías Diabéticas/psicología , Femenino , Humanos , Hipoglucemia/diagnóstico , Hipoglucemia/etiología , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Adulto JovenRESUMEN
OBJECTIVE: To identify the level of physical activity and glycemic variability of adolescents with type 1 diabetes mellitus and to compare glycemic variability on days with different amounts of moderate to vigorous physical activity (MVPA). SUBJECTS AND METHODS: A sample of 34 subjects aged 10 to 15 years, 18 (52.94%) female; age: 13.04 ± 1.94; HbA1c: 9.76 ± 1.51. Physical activity was measured by wGT3X accelerometer. The glucose data were obtained using continuous glucose monitoring, and the following glycemic variability measures were calculated: standard deviation (SD), low blood glucose index (LBGI), high blood glucose index (HBGI), mean amplitude of glycemic excursions (MAGE), glycemic risk assessment in diabetes equation (GRADE) and coefficient of variation (CV). The most and least active days (the days with greater and lesser time dedicated to physical activities of moderate to vigorous intensity, respectively) were identified. In addition, based on the whole period of accelerometer use, daily means of time spent in MVPA were identified among participants, who were then divided into three groups: up to 100 minutes; from 101 to 200 minutes and above 201 minutes. Then, the measures of glycemic variability were compared among the most and least active days and among the groups too. RESULTS: The amount of MVPA was significantly different between the days evaluated (237.49 ± 93.29 vs. 125.21 ± 58.10 minutes), but glycemic variability measures did not present a significant difference. CONCLUSION: Despite the significant differences in the amount of MVPA between the two days evaluated, the glycemic variability did not change significantly. Arch Endocrinol Metab. 2020;64(3):312-8.
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Glucemia/análisis , Diabetes Mellitus Tipo 1/sangre , Ejercicio Físico/fisiología , Adolescente , Niño , Estudios Transversales , Diabetes Mellitus Tipo 1/metabolismo , Diabetes Mellitus Tipo 1/fisiopatología , Femenino , Humanos , MasculinoRESUMEN
ABSTRACT Objective To identify the level of physical activity and glycemic variability of adolescents with type 1 diabetes mellitus and to compare glycemic variability on days with different amounts of moderate to vigorous physical activity (MVPA). Subjects and methods A sample of 34 subjects aged 10 to 15 years, 18 (52.94%) female; age: 13.04 ± 1.94; HbA1c: 9.76 ± 1.51. Physical activity was measured by wGT3X accelerometer. The glucose data were obtained using continuous glucose monitoring, and the following glycemic variability measures were calculated: standard deviation (SD), low blood glucose index (LBGI), high blood glucose index (HBGI), mean amplitude of glycemic excursions (MAGE), glycemic risk assessment in diabetes equation (GRADE) and coefficient of variation (CV). The most and least active days (the days with greater and lesser time dedicated to physical activities of moderate to vigorous intensity, respectively) were identified. In addition, based on the whole period of accelerometer use, daily means of time spent in MVPA were identified among participants, who were then divided into three groups: up to 100 minutes; from 101 to 200 minutes and above 201 minutes. Then, the measures of glycemic variability were compared among the most and least active days and among the groups too. Results The amount of MVPA was significantly different between the days evaluated (237.49 ± 93.29 vs. 125.21 ± 58.10 minutes), but glycemic variability measures did not present a significant difference. Conclusion Despite the significant differences in the amount of MVPA between the two days evaluated, the glycemic variability did not change significantly. Arch Endocrinol Metab. 2020;64(3):312-8
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Humanos , Masculino , Femenino , Niño , Adolescente , Glucemia/análisis , Ejercicio Físico/fisiología , Diabetes Mellitus Tipo 1/sangre , Estudios Transversales , Diabetes Mellitus Tipo 1/fisiopatología , Diabetes Mellitus Tipo 1/metabolismoRESUMEN
OBJECTIVE: In diabetics, foot deformities are risk factors that increase the risk of amputation as a result of developing ulcers. However, knowledge of the influence of plantar stiffness is still limited. The main objective was to describe connections between the degree of stiffness of the ankle, atypical amputation, and the Foot Posture Index (FPI). METHODS: 62 diabetic patients, 58 with type 2 and 4 with type 1 (average age 63.35 years) were included. Records of foot deformities were included; A range of motion test of the ankle joint was used to determine the degree of stiffness. An exploratory analysis of the association of foot position and the degree of rigidity was performed. RESULTS: The dorsal flexion range of the ankle was 9.6 ± 5.1 0, 13.8 ± 5.9 0 and 17.2 ± 6.5 0 and 20.5 ± 6.8 0 to 45, 67, 89 and 111 N respectively in the amputated feet., And 14 patients (22.58%) had a high level of pronation of IPF with an average value of 3.7 ± 2.629, CI (3.032.-4.367) in amputated feet compared to non-amputees. We use the device "Iowa ankle range of motion" (IAROM) to determine the differences in ankle stiffness. Proper IPF was associated with the presence of amputation and an increase in stiffness. CONCLUSIONS: There was an increase in the degree of limitation of movement of the ankle, as a greater force was applied. Comparing FPI between the groups, there was a higher frequency of prone feet in the group of amputees.
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Amputación Quirúrgica , Articulación del Tobillo/fisiopatología , Diabetes Mellitus Tipo 1/fisiopatología , Diabetes Mellitus Tipo 2/fisiopatología , Rango del Movimiento Articular/fisiología , Anciano , Antropometría , Estudios Transversales , Femenino , Pie/fisiopatología , Humanos , Masculino , Persona de Mediana Edad , Postura/fisiología , Valores de Referencia , Estadísticas no ParamétricasRESUMEN
BACKGROUND: The risk of cardiovascular events and sudden death increases with type 1 diabetes mellitus (T1DM). OBJECTIVE: To evaluate electrocardiographic markers of arrhythmias in T1DM patients. METHODS: Electrocardiographic parameters reflecting ventricular depolarization and repolarization, namely, QT, QTc, QTd, QTdc, Tp-e, JT, and JTc intervals and Tp-e/QT and Tp-e/QTc ratios, of 46 patients diagnosed with T1DM were retrospectively analyzed and compared with 46 healthy age-, sex-, and body mass-matched controls. Correlations between T1DM duration, hemoglobin A1c (HbA1c), and ventricular repolarization variables were analyzed. P values lower than 0.05 were considered statistically significant. RESULTS: Diabetes duration was 16.6 ± 7.1 years, and HbA1c was 10.81% ± 3.27% in the T1DM group. In comparison with the control group, heart rate, QTc, QTd, QTdc, Tp-e and JTc intervals, Tp-e/QT ratio (p < 0.001), and Tp-e/QTc ratio (p = 0.007) were significantly higher in T1DM patients. T1DM duration and HbA1c levels were significantly correlated with QTc, QTd, QTdc, Tp-e, and JTc intervals and Tp-e/QT and Tp-e/QTc ratios. CONCLUSIONS: In T1DM patients, potential electrocardiographic repolarization predictors were significantly increased in correlation with disease duration and HbA1c levels. These findings may contribute to the understanding of sudden cardiac death in patients with T1DM.
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Arritmias Cardíacas/fisiopatología , Diabetes Mellitus Tipo 1/fisiopatología , Adulto , Estudios de Casos y Controles , Muerte Súbita Cardíaca , Electrocardiografía/métodos , Fenómenos Electrofisiológicos/fisiología , Femenino , Hemoglobina Glucada/análisis , Frecuencia Cardíaca , Humanos , Masculino , Valores de Referencia , Estudios Retrospectivos , Estadísticas no Paramétricas , Factores de TiempoRESUMEN
SUMMARY In diabetics, foot deformities are risk factors that increase the risk of amputation as a result of developing ulcers. However, knowledge of the influence of plantar stiffness is still limited. The main objective was to describe connections between the degree of stiffness of the ankle, atypical amputation, and the Foot Posture Index (FPI). METHODS 62 diabetic patients, 58 with type 2 and 4 with type 1 (average age 63.35 years) were included. Records of foot deformities were included; A range of motion test of the ankle joint was used to determine the degree of stiffness. An exploratory analysis of the association of foot position and the degree of rigidity was performed. RESULTS The dorsal flexion range of the ankle was 9.6 ± 5.1 0, 13.8 ± 5.9 0 and 17.2 ± 6.5 0 and 20.5 ± 6.8 0 to 45, 67, 89 and 111 N respectively in the amputated feet., And 14 patients (22.58%) had a high level of pronation of IPF with an average value of 3.7 ± 2.629, CI (3.032.-4.367) in amputated feet compared to non-amputees. We use the device "Iowa ankle range of motion" (IAROM) to determine the differences in ankle stiffness. Proper IPF was associated with the presence of amputation and an increase in stiffness CONCLUSIONS There was an increase in the degree of limitation of movement of the ankle, as a greater force was applied. Comparing FPI between the groups, there was a higher frequency of prone feet in the group of amputees
RESUMO Nos diabéticos, as enfermidades nos pés são fatores de risco, que aumentam o risco de sofrerem uma amputação, como resultado do desenvolvimento de úlceras. Contudo, o conhecimento sobre a influência da rigidez plantar ainda é limitado. O objetivo principal foi descrever conexões entre o grau de rigidez do tornozelo, a amputação atípica e o Foot Posture Index (FPI). MÉTODOS 62 diabéticos, 58 com tipo 2; e 4 com tipo 1 (idade média de 63.35 anos). Incluindo o registro de deformidades do pé; teste de classificação do movimento da articulação do tornozelo, para determinar o grau de rigidez. Realizou-se uma análise exploratória da associação da posição do pé com o grau de rigidez. RESULTADO A classificação de flexão dorsal do tornozelo foi de 9.6 ± 5.1 0, 13.8 ± 5.9 0 e de 17.2 ± 6.5 0 e 20.5 ± 6.8 0 a 45, 67, 89 e 111 N respectivamente nos pés amputados, e 14 pacientes (22.58%) teve alto nível de pronação de FPI com um valor médio de 3.7 ±2.629, IC(3.032.-4.367) em pés amputados com relação aos não amputados. Utilizamos o dispositivo "Iowa ankle range of motion" (IAROM) para determinar as diferenças de rigidez do tornozelo. O FPI pronado foi associado à presença de amputação e um aumento da rigidez. CONCLUSÕES Aumento do grau de limitação do movimento do tornozelo; à medida que se aplicava uma força maior. Comparando FPI entre os grupos existentes maior frequência de pés pronados no grupo de amputados.
Asunto(s)
Humanos , Masculino , Femenino , Anciano , Rango del Movimiento Articular/fisiología , Diabetes Mellitus Tipo 1/fisiopatología , Diabetes Mellitus Tipo 2/fisiopatología , Amputación Quirúrgica , Articulación del Tobillo/fisiopatología , Postura/fisiología , Valores de Referencia , Antropometría , Estudios Transversales , Estadísticas no Paramétricas , Pie/fisiopatología , Persona de Mediana EdadRESUMEN
Abstract Background: The risk of cardiovascular events and sudden death increases with type 1 diabetes mellitus (T1DM). Objective: To evaluate electrocardiographic markers of arrhythmias in T1DM patients. Methods: Electrocardiographic parameters reflecting ventricular depolarization and repolarization, namely, QT, QTc, QTd, QTdc, Tp-e, JT, and JTc intervals and Tp-e/QT and Tp-e/QTc ratios, of 46 patients diagnosed with T1DM were retrospectively analyzed and compared with 46 healthy age-, sex-, and body mass-matched controls. Correlations between T1DM duration, hemoglobin A1c (HbA1c), and ventricular repolarization variables were analyzed. P values lower than 0.05 were considered statistically significant. Results: Diabetes duration was 16.6 ± 7.1 years, and HbA1c was 10.81% ± 3.27% in the T1DM group. In comparison with the control group, heart rate, QTc, QTd, QTdc, Tp-e and JTc intervals, Tp-e/QT ratio (p < 0.001), and Tp-e/QTc ratio (p = 0.007) were significantly higher in T1DM patients. T1DM duration and HbA1c levels were significantly correlated with QTc, QTd, QTdc, Tp-e, and JTc intervals and Tp-e/QT and Tp-e/QTc ratios. Conclusions: In T1DM patients, potential electrocardiographic repolarization predictors were significantly increased in correlation with disease duration and HbA1c levels. These findings may contribute to the understanding of sudden cardiac death in patients with T1DM.
Resumo Fundamento: O risco de eventos cardiovasculares e morte súbita aumenta com diabetes mellitus tipo 1 (DM1). Objetivo: Avaliar alguns marcadores eletrocardiográficos de arritmias em pacientes com DM1. Métodos: Parâmetros eletrocardiográficos que refletem despolarização e repolarização ventricular, a saber, os intervalos QT, QTc, QTd, QTdc, Tp-e, JT e JTc e as relações Tp-e/QT e Tp-e/QTc, de 46 pacientes diagnosticados com DM1 foram retrospectivamente analisados e comparados com 46 controles saudáveis, pareados por idade, sexo e massa corporal. As correlações entre duração de DM1, HbA1c e variáveis de repolarização ventricular foram analisadas. Foram considerados estatisticamente significativos os valores de p inferiores a 0,05. Resultados: A duração de diabetes foi de 16,6 ± 7,1 anos, e HbA1c foi 10,81% ± 3,27% no grupo DM1. Em comparação com o grupo controle, a frequência cardíaca, os intervalos QTc, QTd, QTdc, Tp-e e JTc, a relação Tp-e/QT (p < 0,001) e a relação Tp-e/QTc (p = 0,007) foram significativamente mais altos em pacientes com DM1. A duração de DM1 e os níveis de HbA1c foram significativamente correlacionados com os intervalos QTc, QTd, QTdc, Tp-e e JTc e com as relações Tp-e/QT e Tp-e/QTc. Conclusões: Em pacientes com DM1, potenciais preditores eletrocardiográficos de repolarização foram significativamente aumentados em correlação com a duração da doença e com os níveis de HbA1c. Estes achados podem contribuir à compreensão da morte súbita cardíaca em pacientes com DM1.
Asunto(s)
Humanos , Masculino , Femenino , Adulto , Arritmias Cardíacas/fisiopatología , Diabetes Mellitus Tipo 1/fisiopatología , Valores de Referencia , Factores de Tiempo , Hemoglobina Glucada/análisis , Estudios de Casos y Controles , Estudios Retrospectivos , Muerte Súbita Cardíaca , Estadísticas no Paramétricas , Electrocardiografía/métodos , Fenómenos Electrofisiológicos/fisiología , Frecuencia CardíacaRESUMEN
INTRODUCTION: Type 1 diabetes mellitus (DM1) is a chronic disease. OBJECTIVE: To identify scientific evidence on the impact of DM1 on the quality of life of adolescents with this disease. METHOD: Sys tematic review in the bibliographic databases MEDLINE, LILACS, CINAHL, and ScIELO, using the following descriptors: "Adolescent *", "Teen *", "Diabetes Mellitus, Type1", "Diabetes, type 1", "Type 1 diabetes", "Quality of life", "Health related quality of life", "Life quality", "Health impact assessment", "Health impact", "Impact assessment, health", "Diabetes Impact Measurement Scales", "PedsQL", "Glycated Hemoglobin A1c", "Glycosylated Hemoglobin A1c", and "HbA1c". Out of 679 articles identified, 25 were included in the analysis. Some studies were national and international multicenter. The most widely used instruments related to quality of life measurements were the Pediatric Quality of Life Questionnaire (PedsQL) in its generic version and the diabetes module. RESULTS: The quality of life assessed by the adolescent with DM1 using Quality of Life Scales is significantly and inversely associated with HbA1c values. This association includes a significant correlation between the total generic quality of life scores and HbA1c but does not have the same impact on specific sco res. CONCLUSIONS: Metabolic control appears to be the cornerstone that influences the impact on the bidirectional relationship between DM1 and quality of life, however, there is no absolute consensus on the types of factors and degrees that would influence metabolic control.
Asunto(s)
Diabetes Mellitus Tipo 1/fisiopatología , Hemoglobina Glucada/metabolismo , Calidad de Vida , Adolescente , Humanos , Encuestas y CuestionariosRESUMEN
Introdução: A associação entre perda auditiva e Diabetes Mellitus tipo 1 (DM1) é ainda pouco estudada. A perda auditiva é uma das complicações crônicas relacionadas ao grau de controle glicêmico, que os pacientes podem apresentar com a progressão da doença. Objetivo: Investigar o comprometimento auditivo por meio das emissões otoacústicas transitórias (EOAT) por banda de frequência em adolescentes com DM1 e relação com o controle glicêmico. Métodos: Foram incluídos 80 adolescentes, 50% do gênero masculino, entre 10 e 19 anos de idade: 40 com DM1 e 40 controles saudáveis, pareados por gênero e idade. Os dados clínicos e laboratoriais foram pesquisados nos prontuários médicos. O controle glicêmico foi avaliado por meio dos exames de hemoglobina glicada e os pacientes com DM1 analisados de acordo com o controle glicêmico. A avaliação auditiva foi realizada por meio da imitanciometria, audiometria, e posteriormente EOAT, em sala tratada acusticamente, pelo protocolo "TE Test" de clique não-linear (1 KHz a 4 kHz) a 80 dB NPS de intensidade (AuDX - Biologic). Resultados: As respostas às EOAT foram ausentes em 5,12% em pacientes com DM1, com diferença significativa em relação aos controles (p=0,04). A análise das EOAT por bandas de frequência mostrou maior proporção de alteração nos adolescentes com DM1 mal controlados quando comparados aos bem controlados, nas frequências de 1000Hz, 2000Hz e 3000Hz (p<0,05). Conclusão: As EOAT por bandas de frequência permitiram a identificação precoce de comprometimento auditivo em adolescentes com DM1 e mostraram associação entre DM1 mal controlado e perda auditiva. (AU)
Introduction: The association between hearing loss and type 1 diabetes mellitus (DM1) is still poorly studied. Hearing loss is one of the chronic complications related to the degree of glycemic control that patients may present with the progression of the disease. Objective: To investigate auditory impairment through transient otoacoustic emissions (TEOAE) by frequency band in adolescents with DM1 and in relation to glycemic control. Methods: Were included 80 adolescents, 50% males, between 10 and 19 years of age: 40 with DM1 and 40 healthy controls, matched by gender and age. Clinical and laboratory data were taken from the medical records. Glycemic control was evalueted by glycated hemoglobin and the patients with DM1 were analyzed according to glycemic control. To the auditory evaluation were used the immittance and audiometry, and the TEOAE. The test was performed in the acoustically treated room, the non-linear TE test protocol (1 KHz to 4 kHz) at 80 dB SPL (AuDX - Biologic ). Results: TEOAE responses were absent in 5.12% of patients with DM1, with a significant difference in relation to controls (p = 0.04). The analysis of TEOAE by frequency bands showed a higher proportion of alteration in adolescents with DM1 poorly controlled when compared to well controlled ones, in the frequencies of 1000Hz, 2000Hz and 3000Hz (p <0.05). Conclusion: TEOAE by frequency bands allowed the early identification of auditory impairment in adolescents with DM1 and showed an association between poorly controlled DM1 and hearing loss. (AU)
Asunto(s)
Humanos , Masculino , Femenino , Niño , Adolescente , Adulto , Adulto Joven , Estimulación Acústica/métodos , Diabetes Mellitus Tipo 1/fisiopatología , Glucemia/metabolismo , Estudios de Casos y Controles , Estudios Transversales , Cóclea , Diabetes Mellitus Tipo 1/complicaciones , Pérdida Auditiva/etiología , Pruebas Auditivas/métodosRESUMEN
OBJECTIVE: To evaluate the health-related quality of life of adolescents with type 1 diabetes mellitus, associating it with socio-demographic, clinical and biochemical variables. METHOD: Cross-sectional study with 92 adolescents with type 1 diabetes mellitus. A form containing socio-demographic, clinical and biochemical variables was used, as well as the Diabetes Quality of Life for Youths questionnaire. Descriptive statistics and logistic regression were used for analysis. RESULTS: Regarding socio-demographic variables, economic class showed statistically significant differences in relation to total Health Related Quality of Life (p-value =0.02) and the impact domain (p-value =0.009). However, the impact domain was more compromised. Diabetes-related complications (p-value =0.004), number of hospitalizations (p-value =0.01), number of daily insulin injections (p-value =0.02), glycated hemoglobin (p-value =0.002) and triglycerides (p-value =0.03) were associated with greater impairment of quality of life related to total health and greater dissatisfaction. CONCLUSION: Single male adolescents with lower level of education and high glycated hemoglobin levels were more likely to have lower health-related quality of life.