Obesity: The disease
Obesity: The disease
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DOI:
10.1021/jm0680124
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发表时间:
2006-07-13
影响因子:
7.3
通讯作者:
Bray, George A.
中科院分区:
文献类型:
--
作者:
Bray, George A.
Both increased body weight, as expressed in the body mass index [(body weight, kg)/(height, m) 2], and the waist circumference can be used to assess the risk of obesity, and both indices have been rising rapidly as the epidemic of obesity has increased over the past 20 years. Although obesity results from an imbalance between energy intake and expenditure, it is the connections between these two components of the first law of thermodynamics that can provide the clues about how we should understand, prevent, and treat this problem. An epidemiological model that describes the environmental factors that act on a susceptible host provides a useful framework for describing the current epidemic. The pathology of obesity can best be understood as an enlargement of fat cells and in some individuals an increased number of fat cells. These large fat cells release more fatty acids and a variety of cytokines that can provide a basis for understanding how obesity produces insulin resistance and changes in the inflammatory, thrombotic, and coagulation systems. Since no one wants to be obese, there is a large industry offering various forms of treatment. Though we can treat obesity with some success, we rarely cure it, and a plateau in body weight during treatment with subsequent relapse when treatment is terminated is the common experience. Surgical intervention with gastric bypass or gastric restriction is the most effective treatment but at an increased risk of mortality and with substantial morbidity. Only two pharmacological agents are currently approved for long-term use, and they produce only modest weight loss.I start with the premise that all of us want to have a healthy weight and that no one wants to be obese. Interest in obesity has taken a sharp upturn in recent years, and the prevalence of this problem by any standards has increased rapidly. Obesity can be viewed as a chronic, stigmatized, neurochemical disease. 1 In this context, the goal is to return weight to a healthy level and to remove the stigma associated with the use of the word obesity. To consider it in the context of a neurochemical derangement has the advantage of focusing on the underlying mechanisms that produce the distortion in energy balance that produces the unhealthy state. 2