Obesity as Chronic Disease Flashcards
Obesity = impaired _____
function
There are > ___ comorbid conditions &
affects quality & quantity of life that can be associated with obesity
160
Obesity in adolescents has increased from ↑ 5% to 17% in what timeframe?
the last 25 years
Obesity % in Developed vs. Developing countries
~23% in developed vs. ~13% in developing
T/F Obesity is higher with cesarean sections and bottle feedings vs. breast feeding
T
___% of obese children will become obese adults
80
What is the cause of obesity?
Combination of socioeconomic, genetic, & biologic factors
↑ Calories, ↓ Activity, & Genetic/Metabolic predisposition
T/F Inheritance of obesity is usually Mendelian
F
“obesity gene”
ob gene
Leptin
(Greek leptos, “thin”) is one of several appetite-suppression hormones
how does the ob gene relate to leptin?
if someone has the ob gene → increase leptin in adipocytes (also secreted by the stomach)
Normal function of leptin
- Negative feedback signal
- Signals hypothalamus
- Alters the expression of neuroendocrine peptides that regulate energy
intake/expenditure
↓ dietary intake & fat storage
↑ energy expenditure & carbohydrate metabolism
Set-Point Theory
There is a control system built into every person dictating how much adipose tissue s/he should carry
A “thermostat” for body fat
Successfull weight loss according to set point theory
Successful weight loss within this theory is to lower the set point as opposed to just having a caloric deficit
Patients MUST be educated about losing consistent weight over time as opposed to losing a large amount of weight quickly (yo-yo effect)
Goal = 5-10% of body weight over 6-12 months
Obese individuals often have a form of functional “___”
Leptin resistance
The argument for how genetics is involved in obesity
Famine prevents obesity in even the most obesity-prone individual
↑ prevalence of obesity in the US is far too rapid to be due to changes in the gene pool
The Four Horsemen of the Diabesaclypse
Soda
Frozen dairy
Pastries
Fast food
RISK FACTORS OF
OVERWEIGHT & OBESITY
Older age
Lower socioeconomic status in developed countries
Physical inactivity
Stress & other mental illnesses
Disordered sleep (<6 hours/night)*
Childhood obesity
Obese individuals have ____% of the risk of developing T2D
60
Obese indidividuals have >___% of hypertension and coronary heart disease risk
20
There are >____ complications that can occur from obesity
200
PEDIATRIC OBESITY DIAGNOSIS
BMI for age from 85th to 95th percentiles indicates overweight
BMI for age > 95th percentile indicates obesity
BMI for age > 99th percentile indicates severe obesity
ADULT OBESITY DIAGNOSIS criteria
BMI 18.5-24.9 indicates normal weight
BMI 25-29.9 indicates overweight
BMI 30-34.9 indicates obesity, class I
BMI 35-39.9 indicates obesity, class II
BMI >40 indicates obesity, class III (morbid)
BMI ≥ 50 indicates “super obese”
OTHER TESTING for Obesity
- Lipid profile → identify hyperlipidemia
- FBG or OGGT to identify prediabetes or DM
- Liver enzymes → nonalcoholic steatohepatitis (NASH)
- CBC
- Polycythemia may be seen with alveolar hypoventilation syndrome with resulting right heart failure
- Thyroid-Stimulating Hormone (TSH) → hypothyroidism
The USPSTF recommends that clinicians offer or refer adults with a body mass index (BMI) of 30 or higher to _____
intensive, multicomponent behavioral interventions
Rx for ↓television/screen time recommending
SWAP ENJOYABLE ACTIVITY FOR SEDENTARY TIME
TREATMENT & PREVENTION STRATEGIES that address the family as well, not just the child
Eat meals as a family in a fixed place & time
Use small plates & keep serving dishes away from the table
“Plate” food then bring it to the table
Address the family, NOT just the child
What is healthy eating?
Nutrient rich, calorie poor
ORLISTAT MOA
Inhibits gastric & pancreatic lipases in the lumen of the stomach & intestine
Makes them unavailable to hydrolyze dietary triglycerides into absorbable fatty acids & monoglycerides.
Inhibits dietary fat absorption by ~30%
Orlistat Indication
FDA-approved medication for weight loss in obese adults & the only one for adolescents aged 12-16 years old, in addition to multidisciplinary lifestyle weight loss programs
FDA approved for long-term use
Finer et al Trial Highlights for Orlistat
12 months, 228 participants
120 mg TID
≧ 5% weight loss (35 v 21%-placebo)
≧ 10% weight loss (28 v 17%-placebo)
XENDOS Trial Highlights for Orlistat
4 years, 3,305 participants
Mean weight loss (5.8 kg v 3.0 kg-placebo)
Incidence of DM II (6.2 v 9.0%-placebo)
↓ Impaired Glucose Tolerance
ORLISTAT Contraindications
Cholestasis
Chronic malabsorption syndrome
Hypersensitivity to orlistat
contraindicated during pregnancy; safety in lactation unknown
Side effects of Orlistat
GI: oily spotting, flatus with discharge, fecal urgency, fecal incontinence
- Small study (~100 pts) showed ↓ S/S by ↑ fiber intake
psyllium husk & ↓ dietary fat
Send them for dietary counseling first
Pearls for taking cyclosporine or levothyroxine with Orlistat
If used with orlistat, take cyclosporine 3 hours after the orlistat dose.
If used with orlistat, take levothyroxine 4 hours before/after the orlistat dose.
NALTREXONE/BUPROPION (CONTRAVE) MOA
- Not fully understood
- Naltrexone, an opioid antagonist & bupropion, an aminoketone antidepressant (↓ reuptake of dopamine & norepinephrine)
- Regulate food intake by ↑ the firing rate of the hypothalamic pro-opiomelanocortin neurons (appetite regulatory center) & the mesolimbic dopamine circuit
(reward center)
COR (Contrave Obesity Research) I Trial Highlights
≧ 10% weight loss (21% v 7%-placebo)