Introduction: Mothers do not recognize when their child is overweight or obese (OW-OB), and the evidence suggests a relationship between inadequate maternal perception of her child weight (MPCW), and maternal feeding style (MFS). Objectives: a) To assess the reliability of the Caregiver Feeding Style Questionnaire (CFSQ); b) to verify association between MPCW and child' nutritional status; c) to describe the MFS; d) to verify differences between MPCW and child's body mass index (BMI); e) and to verify the association between MPCW and MFS. Methods: 566 dyads participated (mother/preschool child). Mothers circle the image that more resembled their child (MPCW), and answered the CFSQ. Cronbach alpha coeffi cient was calculated. V Cramer, ANOVA and Chi-square were applied. Results: The internal consistency of CFSQ was 0.88. The 8.4% (n = 12) mothers of children are OW-OB had adequate MPCW (V = 0.26, p = 0.001). The most frequent MFS was authoritarian (34.5%, n = 195), MFS uninvolved presented the highest child' BMI (F = 3.91, p < 0.05). When mothers perceive her child is OW-OB have a MFS uninvolved (χ 2 = 15,384, df = 6, p < 0.05).

Objectives to describe the maternal eating and physical activity strategies (monitoring, discipline, control, limits and reinforcement) [MEES]; to determine the relation between MEES and the child's nutritional status [body mass index (BMI) and body fat percentage (BFP)]; to verify whether the MEES differ according to the child's nutritional status. Method participants were 558 mothers and children (3 to 11 years of age) who studied at public schools. The Parental Strategies for Eating and Activity Scale (PEAS) was applied and the child's weight, height and BFP were measured. For analysis purposes, descriptive statistics were obtained, using multiple linear regression and the Kruskal-Wallis test. Results the highest mean score was found for reinforcement (62.72) and the lowest for control (50.07). Discipline, control and limits explained 12% of the BMI, while discipline and control explained 6% of the BFP. Greater control is found for obese children (χ2=38.36, p=0.001) and greater reinforcement for underweight children (χ2=7.19, p<0.05). Conclusions the mothers exert greater control (pressure to eat) over obese children and greater recognition (congratulating due to healthy eating) in underweight children. Modifications in parental strategies are recommended with a view to strengthening healthy eating and physical activity habits.

Introducción: a pesar de que la obesidad infantil es un problema de salud serio, poco se sabe de los factores relacionados con esta en la primera infancia.Objetivo: evaluar qué factores maternos, cognitivos y del lactante influyen en la ingesta energética del lactante y si estos a la vez influyen en su estado nutricional antes del año.Métodos: estudio descriptivo de correlación. Participaron 267 diadas (madre/hijo). Los cuestionarios consistieron en cuatro instrumentos para las variables cognitivas de la madre (autoeficacia materna, actitud en la alimentación, percepción sobre señales de hambre, saciedad y peso delhijo), aporte energético mediante recordatorio de 24 horas y datos sociodemográficos y antropométricos de la madre y del niño, mediante losque se han calculado el índice de masa corporal (IMC) materno y Z-score de peso/talla del lactante.Resultados: el modelo fue significativo para la ingesta de kcal/kg peso (F = 8,624; p < 0,001; R2 = 0,104), correlacionando negativamente con la percepción materna del peso del hijo (B = -9,73; p = 0,002), las horas de sueño (B = -2,19; p = 0,044) y la edad del hijo (B = -2,26; p = 0,001). También para el Z-score (peso/longitud) (F = 68,979; p < 0,001; R2 = 0,564), y se explicó de manera positiva con percepción del peso del hijo (B = 1,133; p < 0,001) y edad del hijo (B = 0,054; p = 0,006) y negativamente con horas de sueño de la madre (B = -0,07; p = 0,040) e ingesta calórica (B = -0,004; p = 0,027).Conclusión: las madres de hijos lactantes que subestiman el peso de su hijo y duermen menos horas proporcionan más ingesta calórica y sus niños presentan mayor Z-score del peso/longitud.

Whole-transcriptome expression profiling provides novel phenotypes for analysis of complex traits. Gene expression measurements reflect quantitative variation in transcript-specific messenger RNA levels and represent phenotypes lying close to the action of genes. Understanding the genetic basis of gene expression will provide insight into the processes that connect genotype to clinically significant traits representing a central tenet of system biology. Synchronous in vivo expression profiles of lymphocytes, muscle, and subcutaneous fat were obtained from healthy Mexican men. Most genes were expressed at detectable levels in multiple tissues, and RNA levels were correlated between tissue types. A subset of transcripts with high reliability of expression across tissues (estimated by intraclass correlation coefficients) was enriched for cis-regulated genes, suggesting that proximal sequence variants may influence expression similarly in different cellular environments. This integrative global gene expression profiling approach is proving extremely useful for identifying genes and pathways that contribute to complex clinical traits. Clearly, the coincidence of clinical trait quantitative trait loci and expression quantitative trait loci can help in the prioritization of positional candidate genes. Such data will be crucial for the formal integration of positional and transcriptomic information characterized as genetical genomics.

r e s U M e n Se identificaron predictores de la percepción materna del peso del hijo (PMPH) con sobrepeso-obesidad (SP-OB). Participaron 2.874 madres e hijos, residentes en el Noreste de México; 951 tenían un hijo con SP-OB. La PMPH se evaluó por palabras (PP) y por imágenes (PI). Por PP, 63.71% y 74.9% de madres de hijos con SP-OB no percibieron adecuadamente el peso del hijo y por PI, 27% y 10.99%. Mediante regresión logística, el modelo para PP fue χ 2 = 152.05, gl = 9, p = 0.001, varianza explicada 21.5% y para PI fue χ 2 = 192.35, gl = 9, p = 0.001, varianza explicada 31.9%. Edad del hijo y si el médico informa de SP en el niño/a, fueron variables que contribuyeron a los modelos. Se concluye que las madres de niños con SP-OB no perciben de forma adecuada esta situación. Se resalta la importancia de informar respecto al SP-OB del hijo. Palabras clave autoresNiño, obesidad, percepción, percepción del peso, reconocimiento, sobrepeso. Palabras clave descriptors a b s T r a c T Several predictors of a mother's perception of her child's weight (MPCW) when the child is overweigh-obese (OW-OB) were identified. Participants: 2,842 mothers and children who reside in Mexico's northeastern region, 951 mothers had an OW-OB child. The MPCW was evaluated for words (PW) and images (PI). PW, 63.71% and 74.9% of the mothers with an OW-OB child, did not perceive the child's weight adequately and PI, 27% and 10.99%. Through Logistic Regression Analysis, a model for PW was χ 2 = 152.05, gl = 9, p = 0.001, 21.5% explained variance; and for PI χ 2 = 192.35, gl = 9, p = 0.001, 31.9% explained variance. The child's age, a doctor's report that the child had OW, were some variables that contributed to the models. We concluded that mothers with OW-OB children * Artículo de investigación. Agradecimientos al Programa de Mejoramiento del Profesorado (PROMEP/103.5/07/2522) por el financiamiento otorgado para la realización del presente proyecto. Los autores están de acuerdo en el orden de autoría y manifiestan que contribuyeron sustancialmente en la elaboración del manuscrito.