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El fútbol es un deporte complejo que implica alto riego de lesión, sin embargo, a pesar de su popularidad a nivel juvenil, los datos sobre la presencia de traumatismo en edades menores a 9 años son limitados. El objetivo de este trabajo es determinar la incidencia de lesiones deportivas en participantes del torneo de fútbol SECACUP 2022 categoría sub-9. Se realizó un estudio observacional, no experimental, transversal y exploratorio. Los parámetros de evaluación fueron: ubicación topográfica, mecanismo de lesión, diagnóstico presuntivo, momento del torneo, tipo de atención, superficie de la cancha y limitación para jugar. Se evaluaron 107 jugadores repartidos en 9 equipos, obteniendo un total de 9 lesionados durante 15 juegos. La incidencia de lesiones fue 4,18 lesiones/1000hrs de juego con un promedio de 0,6 lesiones/partido, en su mayoría contusiones en muslo. El 89% de los jugadores lesionados no presentaban una lesión previa al momento del inicio del torneo. La posición con mayor incidencia de lesiones fue el Medio-Campo con 45%. En 89% de los casos, la causa de la lesión fue el traumatismo directo. Está actividad ha llevado a mayor participación de niños, incrementando las lesiones, el conocimiento de la incidencia es importante para desarrollar medidas preventivas apropiadas para la edad(AU)

Soccer is a complex sport that involves a high risk of injury; however, despite its popularity at the youth level, data on the presence of trauma in children under 9 years of age are limited. The objective of this work is to determine the incidence of sports injuries in participants of the SECACUP 2022 soccer tournament under-9 category. An observational, nonexperimental, cross-sectional and exploratory study was made. The evaluation parameters were: topographic location, injury mechanism, presumptive diagnosis, time of the tournament, type of care, court surface and limitation to play. 107 players divided into 9 teams were evaluated, obtaining a total of 9 injured during 15 games. The incidence of injuries was 4, 18 injuries/1000 hours of play with an average of 0,6 injuries/game, mostly thigh contusions. 89% of the injured players had no previous injury at the start of the tournament. The position with the highest incidence of injuries was Midfield with 45%. In 89% of cases, the cause of the injury was direct trauma. This activity has led to a greater participation of children, increasing injuries, knowledge of the incidence is important to develop age-appropriate preventive measures(AU)

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BACKGROUND AND AIMS: Chronic heart failure (CHF) represents a significant cause of morbidity and mortality globally. Metabolic maladaptation has proven to be critical in the progression of this condition. Preclinical studies have shown that irisin, an adipomyokine involved in metabolic regulations, can induce positive cardioprotective effects by improving cardiac remodeling, cardiomyocyte viability, calcium delivery, and reducing inflammatory mediators. However, data on clinical studies identifying the associations between irisin levels and functional imaging parameters are scarce in CHF patients. The objective of this study was to determine the association of irisin levels with cardiac imaging measurements through cardiac magnetic resonance, inflammatory markers, and biochemical parameters in patients with CHF compared with control subjects. METHODS AND RESULTS: Thirty-two subjects diagnosed with CHF and thirty-two healthy controls were evaluated in a cross-sectional study. Serum irisin levels were significantly lower in patients with CHF than in controls. This is the first study to report a significant positive correlation between irisin levels and cardiac magnetic resonance parameters such as left ventricular ejection fraction, fraction shortening, and global radial strain. A negative correlation was demonstrated between irisin levels and brain natriuretic peptide, insulin levels, and Homeostatic model assessment for insulin resistance index. We did not observe significant correlations between irisin levels and inflammatory cytokines. CONCLUSIONS: Given the importance of fraction shortening and global radial strain as accurate markers of ventricular wall motion, these results support the hypothesis that irisin may play an essential role in maintaining an adequate myocardial wall architecture, deformation, and thickness.

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Endothelial dysfunction is a crucial physiopathological mechanism for cardiovascular diseases that results from the harmful impact of metabolic disorders. Irisin, a recently discovered adipomyokine, has been shown to exert beneficial metabolic effects by increasing energy consumption, improving insulin sensitivity, and reducing the proinflammatory milieu. Multiple preclinical models have assessed irisin's possible role in the development of endothelial dysfunction, displaying that treatment with exogenous irisin can decrease the production of oxidative stress mediators by up-regulating Akt/mTOR/Nrf2 pathway, promote endothelial-dependent vasodilatation through the activation of AMPK-PI3K-AkteNOS pathway, and increase the endothelial cell viability by activation of ERK proliferation pathway and downregulation of Bad/Bax/Caspase 3 pro-apoptotic pathway. However, there is scarce evidence of these mechanisms in clinical studies, and available results are controversial. Some have shown negative correlations of irisin levels with the burden of coronary atherosclerosis and leukocyte adhesion molecules' expression. Others have demonstrated associations between irisin levels and increased atherosclerosis risk and higher carotid intima-media thickness. Since the role of irisin in endothelial damage remains unclear, in this review, we compare, contrast, and integrate the current knowledge from preclinical and clinical studies to elucidate the potential preventive role and the underlying mechanisms and pathways of irisin in endothelial dysfunction. This review also comprises original figures to illustrate these mechanisms.

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The prevalence of type 2 diabetes mellitus (T2DM) and metabolic syndrome (MetS) has increased in the pediatric population. Irisin, an adipomyokine, is involved in white adipose tissue browning, energy expenditure, insulin sensitivity, and anti-inflammatory pathways. Data on the associations among circulating irisin levels, soluble cell adhesion molecules (sCAMs), and inflammatory cytokines is scarce in children and adolescents with MetS and T2DM. Subjects aged 6-16 years were grouped into T2DM, MetS, and healthy controls. Serum irisin levels were significantly lower in the MetS (6.6 [2.8-18.0] ng/mL) and T2DM (6.8 [2.2-23.2] ng/mL) groups compared with controls (30.3 [24.6-57.1] ng/mL). Negative correlations between irisin and the BMI percentile (R = -0.358), WC percentile (R = -0.308), and triglycerides (R = -0.284) were identified, while positive associations with TC (R = 0.287), HDL-c (R = 0.488), and LDL-c (R = 0.414) were observed. Significant negative correlations were found between irisin and sNCAM (R = -0.382), sICAM-2 (R = -0.300), sVCAM-1 (R = -0.292), MCP-1 (R = -0.308), and IFN-α2 (R = -0.406). Of note, lower concentrations of most sCAMs (sICAM-1, sPSGL-1, sP-selectin, sEpCAM, sICAM-2, sALCAM, sPECAM-1, sCD44, sVCAM-1, sICAM-3, sL-selectin, and sNCAM) were shown in T2DM subjects compared with MetS patients. Lower irisin levels induce a lack of inhibition of oxidative stress and inflammation. In T2DM, higher ROS, AGEs, glucotoxicity, and inflammation trigger endothelial cell apoptosis, which downregulates the sCAM expression as a compensatory mechanism to prevent further vascular damage. In opposition, in subjects with MetS that have not yet developed T2DM and its accompanying stressors, the upregulation of the sCAM expression is ensued.

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Exercise is an effective strategy for preventing and treating obesity and its related cardiometabolic disorders, resulting in significant loss of body fat mass, white adipose tissue browning, redistribution of energy substrates, optimization of global energy expenditure, enhancement of hypothalamic circuits that control appetite-satiety and energy expenditure, and decreased systemic inflammation and insulin resistance. Novel exercise-inducible soluble factors, including myokines, hepatokines, and osteokines, and immune cytokines and adipokines are hypothesized to play an important role in the body's response to exercise. To our knowledge, no review has provided a comprehensive integrative overview of these novel molecular players and the mechanisms involved in the redistribution of metabolic fuel during and after exercise, the loss of weight and fat mass, and reduced inflammation. In this review, we explain the potential role of these exercise-inducible factors, namely myokines, such as irisin, IL-6, IL-15, METRNL, BAIBA, and myostatin, and hepatokines, in particular selenoprotein P, fetuin A, FGF21, ANGPTL4, and follistatin. We also describe the function of osteokines, specifically osteocalcin, and of adipokines such as leptin, adiponectin, and resistin. We also emphasize an integrative overview of the pleiotropic mechanisms, the metabolic pathways, and the inter-organ crosstalk involved in energy expenditure, fat mass loss, reduced inflammation, and healthy weight induced by exercise.

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Despite numerous demonstrations that the immune system is activated in heart failure, negatively affecting patients' outcomes, no definitive treatment strategy exists directed to modulate the immune system. In this review, we present the evidence that B cells contribute to the development of hypertrophy, inflammation, and maladaptive tissue remodelling. B cells produce antibodies that interfere with cardiomyocyte function, which culminates as the result of recruitment and activation of a variety of innate and structural cell populations, including neutrophils, macrophages, fibroblasts, and T cells. As B cells appear as active players in heart failure, we propose here novel immunomodulatory therapeutic strategies that target B cells and their products.

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Vitamin D deficiency is highly prevalent worldwide. It has been associated with heart failure (HF) given its immunoregulatory functions. In-vitro and animal models have shown protective roles through mechanisms involving procollagen-1, JNK2, calcineurin/NFAT, NF-κB, MAPK, Th1, Th2, Th17, cytokines, cholesterol-efflux, oxLDL, and GLUT4, among others. A 12-month follow-up in HF patients showed a high prevalence of vitamin D deficiency, with no seasonal variation (64.7-82.4%). A positive correlation between serum 25(OH)D concentration and dietary intake of vitamin D-rich foods was found. A significant inverse correlation with IL-1ß (R = -0.78), TNF-α (R = -0.53), IL-6 (R = -0.42), IL-8 (R = -0.41), IL-17A (R = -0.31), LDL-cholesterol (R = -0.51), Apo-B (R = -0.57), total-cholesterol (R = -0.48), and triglycerides (R = -0.32) was shown. Cluster analysis demonstrated that patients from cluster three, with the lowest 25(OH)D levels, presented the lowermost vitamin D intake, IL-10 (1.0 ± 0.9 pg/mL), and IL-12p70 (0.5 ± 0.4 pg/mL), but the highest TNF-α (9.1 ± 3.5 pg/mL), IL-8 (55.6 ± 117.1 pg/mL), IL-17A (3.5 ± 2.0 pg/mL), total-cholesterol (193.9 ± 61.4 mg/dL), LDL-cholesterol (127.7 ± 58.2 mg/dL), and Apo-B (101.4 ± 33.4 mg/dL) levels, compared with patients from cluster one. Although the role of vitamin D in the pathogenesis of HF in humans is still uncertain, we applied the molecular mechanisms of in-vitro and animal models to explain our findings. Vitamin D deficiency might contribute to inflammation, remodeling, fibrosis, and atherosclerosis in patients with HF.

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BACKGROUND: Adipokines and the myokine irisin, involved in mechanisms associated with obesity and metabolic syndrome (MS), are understudied in the pediatric population. OBJECTIVE: To investigate the relationship between irisin, and leptin, resistin, adiponectin, adipsin, anthropometric and cardiovascular risk factors in Mexican children. METHODS: A cross-sample of 126 Mexican children aged 6-12 years old were classified as normal weight (n = 46), obese (n = 40), and MS (n = 40) according to CDC's and Cook's age-modified criteria for obesity and MS. Anthropometric parameters and blood pressure were determined and percentiles calculated for age and gender. Irisin, leptin, adiponectin, adipsin, resistin, triglycerides, glucose, high-density lipoprotein cholesterol (HDL-c) levels, and physical activity were determined. Statistical tests for differences between groups, correlation, and multiple regression analyses were performed. RESULTS: Irisin plasma levels were significantly lower in the obese (6.08 [4.68-6.65]) and MS groups (6.46 [5.74-7.02]) compared with the normal-weight group (8.05 [7.24-8.94]) (p < 0.001). Irisin levels were not influenced by age or gender, but significant dispersion was observed in obese girls (95% CI median [2.29-6.30]). Leptin, resistin, and adipsin levels were significantly increased in the obese and MS groups. Lean-fat ratio was significantly higher in the NW group. Irisin correlated negatively with leptin (- 0.310), resistin (- 0.389), adipsin (- 0.362), BMI% (-0.472), WC% (- 0.453), BMI z-score (- 0.496), fat free mass (- 0.257), fat percentage (- 0.532), fat mass (- 0.515), triglycerides (- 0.291), the number of cardiometabolic risk factors (- 0.443) (p < 0.001); positively with lean-fat ratio (0.489) and HDL-c (0.328) (p < 0.001) and none with physical activity (p < 0.001). Following stepwise multiple linear regression analysis, the lean-fat ratio was the only determinant of irisin levels (B = 1.168, p < 0.001). CONCLUSIONS: Lean-fat ratio, more than the absolute amount of muscle or fat mass, as well as potential myokine-adipokine cross-talk mechanisms may explain the lower irisin levels in children with obesity and MS, through blunted compensatory responses interfering with tissue-dependent irisin secretion, contributing to a continuous deleterious effect cycle.

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Proinflammatory cytokines and the novel myokine irisin, a cleavage product of FNDC5, have been found to play a role in obesity and type 2 diabetes mellitus (T2DM). Irisin has been shown to increase browning of adipose tissue, thermogenesis, energy expenditure, and insulin sensitivity, yet its association with inflammatory markers is still limited. Circulating irisin has been found to be increased in obesity, while in adult subjects with T2DM decreased levels have been found. However, data establishing the association of circulating irisin in children and adolescents with T2DM has not been described in the literature. The objective of this study was to determine irisin plasma concentration and its association with metabolic and adiposity markers and with hs-CRP, a surrogate marker of inflammation used in clinical practice, in a pediatric population with T2DM. A cross-sample of 40 Mexican children and adolescents aged 7-17 were recruited, 20 diagnosed with T2DM and 20 healthy controls. Plasma irisin levels were found to be lower in the T2DM group compared with controls, which could be attributed to a reduced PGC-1α activity in muscle tissue with a consequent decrease in FNDC5 and irisin expression. Irisin concentration was found to be positively correlated with HDL-c, LDL-c, and total cholesterol, while negatively correlated with BMI, waist circumference, and triglycerides. However, after multiple regression analysis, only HDL-c correlation remained significant. hs-CRP was higher in the T2DM group and positively associated with adiposity markers, unfavorable lipid profile, insulin levels, and HOMA-IR, but no association with irisin was found. Given the favorable metabolic effects attributed to irisin, the low plasma levels found in children and adolescents with T2DM could exacerbate the inflammatory and metabolic imbalances and the intrinsic cardiovascular risk of this disease. We propose an "irisin-proinflammatory/anti-inflammatory axis" to explain the role of irisin as a metabolic regulator in obesity and T2DM.

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Introducción: En la literatura se describe poca utilización y conocimiento de las pruebas de hidrógeno en aliento por la comunidad médica. Este trabajo busca aportar datos cuantitativos sobre el conocimiento y uso de este tipo de pruebas en la comunidad médica de Monterrey, Nuevo León, México. Materiales y Métodos: Se elaboró y valido mediante metodología DELPHI una encuesta que evaluó los conocimientos y uso de pruebas de hidrógeno en aliento. Para el análisis de datos se utilizaron estadísticas descriptivas. Resultados: Se obtuvieron 158 encuestas siendo la mayor parte de los encuestados pediatras (34%). La mayoría de los encuestados refirió no conocer las pruebas (69%), no haberlas indicado (93%) y desconocer su costo (95,6%). El 67,1% de los encuestados refirieron el desconocimi ento como factor limitante para la indicación de estas pruebas en su práctica. Los médicos consideraron útiles las pruebas de hidrógeno en aliento para el diagnóstico de intolerancia a carbohidratos (38,6%), síndrome de sobrecrecimiento bacteriano intestin al (31,6%) y ninguna opción (32,9%). Discusión : Los resultados indican que las pruebas son poco utilizadas y se tiene un considerable desconocimiento sobre ellas en nuestro medio. Esto indica la necesidad de dar mayor difusión y educar a la comunidad médic a sobre su utilidad.

Introduction: In the literature, it is reported an underuse and limited knowledge of hydrogen breathe tests by the medical community. This work aim to provide quantitative data about the knowledge and use hydrogen breath test in the medical community of Monterrey, Nuevo León, México. Materials and methods: A survey was developed and validated thought DELPHI methodology. The survey evaluated knowledge and use of hydrogen breath tests. For the data analysis, descriptive statistics was used. Results: A total of 158 surveys was obtained. Most of the survey physicians were pediatricians (34%). Most of the survey physicians referred not knowing hydrogen breath tests (69%), have not indicated the breath tests (93%), and not knowing the cost (95,6%). 67,1% of the survey physicians described ignorance has the limiting factor for not indicating this kind of test in their practice. Physicians considered hydrogen breath test useful for the diagnosis of carbohydrates intolerance (38,6%), intestinal overgrowth bacterial syndrome (31,6%), and not useful (32,9%). Discussions : There is a considerable ignorance in the medical community about hydrogen breath test. Even further, this diagnostic resource is underutilized in our context. The results present the necessity to give more diffusion and to educate medical community about hydrogen breath tests.

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BACKGROUND: Hydrogen breath tests (HBT) are used to confirm the diagnosis of carbohydrate intolerance or small intestinal bacterial overgrowth (SIBO). OBJECTIVE: Determine the existence of a correlation between the presence and intensity of symptoms experimented by the patient after the ingestion of a carbohydrate load and the test result. MATERIALS AND METHODS: This is an observational, retrospective and analytic study, in which all patients' files from year 2008 to 2014 containing a report of a HBT performed at Hospital San José TEC de Monterrey were revised. Using a visual analogue scale (VAS), the patient reported the intensity of gastrointestinal symptoms during the test. Descriptive statistics were obtained, and exclusively for lactose HBTs, Pearson's correlation coefficient (r) between maximum hydrogen concentration in breath and symptom intensity was calculated. RESULTS: A HBT was performed in 33 patients: 23 with lactose, 5 with fructose, and 5 with lactulose as substrate. Of these, 10, 2, and 5 tests were positive, respectively. For lactose HBTs, the symptom with most sensitivity was flatulence (80%), which also had the greatest likelihood ratio for a positive test (1.73). Diarrhea had the greatest specificity (84.6%). A tendency for positivity was observed when patients presented symptoms. A moderately positive correlation between hydrogen ppm and symptom intensity was found (r=0.427, p=0.023). CONCLUSIONS: A correlation between symptom intensity and test positivity was found in patients with lactose intolerance. The presence of flatulence after lactose loading may be indicative of a positive test.

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Antecedentes: Las pruebas de hidrógeno en aliento (PHA) se utilizan para el diagnóstico de intolerancia a carbohidratos y sobrecrecimiento bacteriano intestinal. Objetivo: Determinar si existe una correlación entre la presencia e intensidad de los síntomas experimentados por el paciente tras la carga de carbohidrato y el resultado de la PHA. Materiales y métodos: Estudio observacional, retrospectivo y analítico en el cual se revisaron los expedientes con PHA realizadas en el Hospital San José TEC de Monterrey. Mediante una escala visual análoga se reportaron los síntomas y su intensidad presentados durante la PHA. Se realizó estadística descriptiva y para las pruebas de lactosa se calculó el coeficiente de correlación de Pearson entre la concentración máxima de hidrógeno y la intensidad de los síntomas (r). Resultados: 33 pacientes se sometieron a PHA: 23 de lactosa, 5 de fructosa y 5 de lactulosa. De estas, 10, 2 y 5 pruebas resultaron positivas, respectivamente. En las pruebas de lactosa, el síntoma más sensible fue la flatulencia (80%) con el coeficiente de probabilidad más alto (1,73). La diarrea tuvo la mayor especificidad (84,6%). Se observó una tendencia a positividad cuando los pacientes experimentaron síntomas. Se encontró una correlación moderadamente positiva entre las ppmh y la intensidad de los síntomas (r=0,472, p=0,023). Conclusiones: En los pacientes con intolerancia a la lactosa existe una correlación entre la intensidad de los síntomas y la positividad de la prueba de aliento. La presencia de flatulencia tras la carga de lactosa orienta a una prueba positiva.

Background: Hydrogen breath tests (HBT) are used to confirm the diagnosis of carbohydrate intolerance or small intestinal bacterial overgrowth (SIBO). Objective: Determine the existence of a correlation between the presence and intensity of symptoms experimented by the patient after the ingestion of a carbohydrate load and the test result. Materials and methods: This is an observational, retrospective and analytic study, in which all patients files from year 2008 to 2014 containing a report of a HBT performed at Hospital San José TEC de Monterrey were revised. Using a visual analogue scale (VAS), the patient reported the intensity of gastrointestinal symptoms during the test. Descriptive statistics were obtained, and exclusively for lactose HBTs, Pearsons correlation coefficient (r) between maximum hydrogen concentration in breath and symptom intensity was calculated. Results: A HBT was performed in 33 patients: 23 with lactose, 5 with fructose, and 5 with lactulose as substrate. Of these, 10, 2, and 5 tests were positive, respectively. For lactose HBTs, the symptom with most sensitivity was flatulence (80%), which also had the greatest likelihood ratio for a positive test (1.73). Diarrhea had the greatest specificity (84.6%). A tendency for positivity was observed when patients presented symptoms. A moderately positive correlation between hydrogen ppm and symptom intensity was found (r=0.427, p=0.023). Conclusions: A correlation between symptom intensity and test positivity was found in patients with lactose intolerance. The presence of flatulence after lactose loading may be indicative of a positive test.