Obesity and Weight Management Flashcards
What is obesity?
A chronic,
progressive, relapsing, and treatable multifactorial, neurobehavioral disease,
wherein an increase in body fat promotes adipose tissue dysfunction and
abnormal fat mass physical forces, resulting in adverse metabolic,
biomechanical, and psychosocial health consequences
How to classify obesity?
BMI
What are the classifications of BMI?
What is the Edmonton Obesity Staging System (EOSS)?
What is the American Association of Clinical Endocrinologists
Obesity Classification?
More than ___% of adults in the US are obese
40%
Obesity is the ___ leading cause for preventable death
Second
What are some contributing factors to obesity?
Genetic, environment, development, behavior
Describe the genetics of obesity
Monogenic vs. polygenic
Monogenic: early onset, severe obesity, rare, variation in single gene, alleles with high penetrance, no environmental influence
Polygenic: common, modest genetic influence, several variants, alleles of low penetrance, environment is a key factor in
expression
What are some genetic abnormalities and syndromes that are associated with obesity?
What is MC4R deficiency?
Hyperphagia, accelerated linear growth, insulin resistance
Autosomal dominant or recessive
Most common form of monogenic obesity
What is POMC Deficiency?
Hyperphagia, ACTH deficiency, hypopigmentation, pale skin, red hair
Autosomal recessive
What is leptin deficiency?
Hyperphagia, hypogonadism, absence growth spurt, impaired T cell function
Autosomal Recessive
What is Bardet-Biedl Syndrome?
Hyperphagia, vision loss, polydactyly, hypogonadism, renal disease, metabolic syndrome
Autosomal recessive
What is Cohen Syndrome?
Central obesity with thin arms/legs, small head with thick hair, eyebrows,
eyelashes, developmental delay, retinal dystrophy, joint hypermobility,
overly friendly behavior, neutropenia
Autosomal recessive
What is Prader-Willi Syndrome?
Hypotonia and poor feeding at birth, hyperphagia develops at 2 years,
thin face with almond shaped eyes, short stature with small
hands/feet, delayed development and intellectual impairment,
hypogonadism
Parental chromosome 15 partial loss of function (usually not inherited)
Most common form of syndromic obesity
Significant increase in ghrelin in PWS
What is Albright’s Hereditary Osteodystrophy?
Short stature, round face, dental abnormalities, shortened fingers/toes,
pseudohypoparathyroidism
Associated with genetic imprinting in an autosomal dominant manner
Describe specific epigenetic factors that play into obesity
DNA methylation, histone modification, RNA based mechanisms
Describe specific environmental factors that play into obesity
Diet, activity, aging, smoking, toxin exposures, sleep, stress, learned patterns
Describe specific social factors that play into obesity
Lack of green space, lack of safety, food deserts, food insecurity, low socioeconomic status, low education,
dietary
What are the forms of energy expenditure?
Resting metabolic rate - 60%
Physical activity - 30%
Thermic effects of food - 10%
What are the signaling pathways for the gut-brain axis?
- Hormonal
- Neuronal (vagus nerve)
- Orexigenic (appetite stimulant)
- Anorexigenic (appetite suppressant)
What role does our brain play in appetite
regulation?
Homeostatic eating: when we are
depleting our energy stores we have
increased motivation to eat
Hedonic eating: increased desire to
consume foods that are
highly palatable
Executive function: overriding any signaling and
deciding to eat or not eat
What are some hormonal factors that are involved in appetite regulation?