Obesity By Genetic And Environmental Factors

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Genetic factors of obesity The family transmission of obesity is well known. However, the members of a family, as well as share genes, are exposed to the same diet. Studies carried out twin envelopes show that body fat is determined significantly by genetic factors. The amount of fat and the same regional distribution are influenced by genetic factors as well as also the energy costs and the adaptation of the individual against an excess energy supply. Genetic factors: there is growing evidence that in a significant proportion obesity is genetically determined. Although it is difficult to differentiate between genetic inheritance and cultural heritage (lessons learned), there is one growing consensus that the IMC is inherited in about 33% of the cases (Stunkard, 1996). Genetic Heritage Of Obesity Research shows that the offspring of a couple with proper weight has only between 7 and 14% chance of suffering from obesity, the figure increases to 40% and 80% respectively, when one or both parents are obese. However, we noted the same trend of body weight both biological children and adopted children of obese people. This indicates that the behavior of parents or social heritage models, also play an important role in the genesis of obesity. Currently it is known that there are several genes capable of causing obesity or increase the susceptibility of developing it; two are the ones who have received greater attention: the ob. gene and the gene beta3-adrenoreceptor. The ob gene encodes the protein leptin into fat cells. Leptin acts on the hypothalamus and affects satiety signals. Gene beta3-adrenoreceptor, located mainly in adipose tissue, regulates the resting metabolic rate and the oxidation of fat in humans. Genes confer susceptibility to obesity, but there must be other factors that determine it, as these are the environmental factors (cultural, psychological and physical activity, among others).