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IOSR Journal 0f Pharmacy
(e)-ISSN: 2250-3013, (p)-ISSN: 2319-4219
www.iosrphr.0rg Volume 4, Issue 01 (January 2014), Pp 01-05

Obesity, a burning problem
1,

Dr. Arunima Chaudhuri, 2, Dr. Amit Kumar Bandopadhyay

1

Assistant Professor, Department of Physiology, Burdwan Medial College, Burdwan 713104, West Bengal,
India.
2
Professor and Head of the Department of Anaesthesiology, Burdwan Medial College, Burdwan 713104, West
Bengal, India.
Abstract: Obesity, one of the greatest public health challenges of 21st century, is related to several chronic
conditions such as type II diabetes, hypertension, dyslipaedaemia and cardiovascular diseases and renal
pathologies. Individuals with increased abdominal obesity are found to have an atherogenic triad, associated
with adverse cardiovascular outcomes. Human obesity is characterized by marked sympathetic activation.
Adiposity is associated with chronic low-grade systemic as well as inflammation of the hypothalamus. In
women, early onset of obesity favors the development infertility in the adult age. In men, obesity is associated
with low testosterone levels, reduced spermatogenesis and erectile dysfunction. Lifestyle modifications, drugs &
surgical intervention may prove to be fruitful in treatment of obesity.
Keywords: Obesity, health hazards.

I.

INTRODUCTION:

One of the greatest public health challenges in the first half of 21 st century is preventing the epidemic of obesity.
In India obesity is most prevalent in urban populations (male = 5.5%, female = 12.6%), followed by the urban slums (male =
1.9%, female = 7.2%). Obesity rates are the lowest in rural populations (male = 1.6%, female = 3.8%). Obesity has reached
epidemic proportions in India , with morbid obesity affecting 5% of the country's population. Socioeconomic class has an
effect on the rate of obesity. As populations become more westernized, concerns about an obesity epidemic are on rise 1, 2.

II.

CLASSIFICATION OF OBESITY:

Body mass index (BMI) is used by the National Institutes of Health's (NIH) to classify obesity, while the World
Health Organization (WHO), uses body fat percentage. Using race or ethnic-specific BMI cut-off values can more accurately
identify obesity in a population than the existing classification system 3, 4. For Asians population the values of BMI have
been reset as their body composition is different from that of the western world 5. Proposed classification of weight by BMI
in adult Asians: Underweight < 18.5; Normal range: 1 8. 5 - 22. 9; Overweight >23; Obese I: 2 5 - 2 9. 9; Obese II > 30.
MRI and Bioelectric Impedance Analyzer for measuring body fat percentage have proven to be more useful. Based
on cross-sectional analyses, it has been suggested that hip circumference divided by height (1.5) minus 18 (the body
adiposity index, BAI), could directly estimate percent body fat without the need for further correction for sex or age. But
other studies showed that estimates based on BAI are not more accurate than those based on BMI, waist circumference, or
hip circumference6.

III.

OBESITY AND HEALTH HAZARDS:

Obesity is related to type II diabetes, hypertension, dyslipaedaemia and cardiovascular diseases (CVD) 1, 2, 3, 7, 8.
The endocannabinoid system (ECS) is involved in lipid metabolism and obesity. In obese individuals blood concentrations
of the endocannabinoids anandamide (AEA), 2 arachidonoylglcyerol (2-AG), fatty acid amide hydrolase (FAAH) and
monoacylglycerol lipase (MGL) changes. FAAH activity in subcutaneous adipocytes increases with BMI 9, 10. Polymorphism
of 385 C/A of FAAH is associated with overweight and obesity while mutations have been found to improve cardiovascular
profile 10. Adiposity is associated with chronic low-grade systemic inflammation as well as increased inflammation of the
hypothalamus. Inflammation of hypothalamus may reduce the integrity of structures involved in reward and feeding
behaviours8 and this may alter the feeding behaviors.
In women, early onset of obesity favors the development infertility in the adult age. Obesity in women can also
increase risk of miscarriages and impair the outcomes of assisted reproductive technologies and pregnancy. Polycystic ovary
syndrome (PCOS) is the most common cause of infertility, affecting up to one in 10 women 3, 11. Insulin resistance, marked
by persistently elevated insulin, abnormal regulation of blood sugar and insensitivity to insulin in the liver and muscle cells,
occurs in PCOS. The pituitary gland actively responds to chronically high insulin levels, triggering a cascade of hormonal
changes that disrupt ovarian function and impair fertility. With increased circulating insulin levels, the gonadotrophs in
obesity start pumping out large amounts of LH, thus disrupting ovulation 11. In men, obesity is associated with low
testosterone levels, reduced spermatogenesis and erectile dysfunction 3, 11.

1
Obesity, a burning problem

IV.

DYSLIPIDEMIA OF OBESITY:

In many overweight and obese patients hypertension, diabetes mellitus and hyperlipidemia occur
together, greatly increasing the risk of atherosclerosis which may lead to heart attack, stroke and kidney diseases
3
. Adipose tissue lipid storage and processing capacity can be a key factor for obesity-related metabolic
disorders. Morbidly obese patients have a lower gene expression of factors related with lipid uptake and
processing 11, 12.
Paraoxonase-1 (PON1) plays a significant role in the prevention of obesity-related accelerated
atherosclerosis by hydrolyzing lipid peroxides in oxidized low-density lipoproteins.
Obese subjects have increased oxidative stress and decreased PON1 activity 13. Increased proportion of
small, dense LDL and HDL particles are associated with the risk of coronary heart disease (CHD) 1, 2, 3. Potential
mechanisms that link small LDL particles to increased risk of vascular events are augmented oxidizability and
increased permeability through the endothelial barrier. As for HDL, particle size, may involve the altered
activity of lipases involved with the maturation and transformation of lipoproteins 1, 2, 3, 12.
Direct adipose tissue free fatty acid (FFA) storage may contribute to body fat distribution. There is
evidence of reduced storage proteins in those with greater visceral fat 14. The elevated Intramyocellular
triglyceride (IMTG) concentration in obesity is accompanied by a increased capacity for fatty acid flux into the
myocyte via an abundance of the key fatty acid transporter FAT/CD36 on the muscle membrane. Augmented
intramyocellular fatty acid availability can increase triglyceride synthesis without altering the activity of key
enzymes within the esterification pathway 15.
Differential lipid redistribution through lipoproteins may affect body fat distribution. 16
Potential adipocyte specific rate-limiting steps include 1) facilitated FA transport across the plasma membrane,
mediated by proteins such as CD36, plasma membrane-associated fatty acid-binding protein (FABP[pm]), and
fatty acid transport protein 1 (FATP1); 2) acylation,
3) final step of triacylglycerol formation 14,15,16.
V.

EFFECT OF DISTRIBUTION OF BODY FAT AND INFLUENCE OF GENDER:

Effect of body fat distribution on CVD can be explained by the hormonal and metabolic disturbances
observed in abdominal obesity. As there are marked gender differences in regional body fat distribution, sex
steroids are likely candidates for the determination of individual differences in body fat distribution and related
metabolism 17, 18, 19.
Abdominal obesity drives the progression of multiple cardiometabolic risk factors. This occurs through
altered secretion of adipocyte-derived biologically active substances (adipokines), including free fatty acids,
adiponectin, interleukin-6, tumour necrosis factor alpha, and plasminogen activator inhibitor-1. Typically, upper
body obesity (android, ‘apple shape’ obesity) is more commonly found in men, whereas lower body obesity
(gynoid, ‘pear shape’) is more commonly found in women. Upper body obesity receives contributions from
adiposity in subcutaneous and intra-abdominal compartments. Individuals with increased waist circumference
are found to have an atherogenic triad of elevated apolipoprotein B, fasting hyperinsulinaemia, and small, dense
LDL, which are strongly associated with adverse cardiovascular outcomes 17, 18, 19.

VI.

OBESITY AND AUTONOMIC FUNCTIONS:

Obese persons suffer from an increased mortality risk supposedly due to cardiovascular disorders
related to either continuously lowered parasympathetic or altered sympathetic activation 20.
Heart rate variation is reported to be reduced in obese individuals. Human obesity is characterized by
marked sympathetic activation 21. A 10 percent increase in body weight above an individual’s usual weight is
accompanied with a decrease in parasympathetic activity 21.This is one mechanism for cardiac arrhythmias that
accompany obesity 21.
Leptin is an anorexigenic hormone that influences the feeding and satiety centres in hypothalamus.
Neuropeptide Y (NPY) is orexigenic and NPY containing neurons have their cell bodies in the arcuate nuclei of
hypothalamus and project to the paraventricular nuclei 3.
Higher sympathetic activity in obese individuals is related to higher leptin levels. Leptin increases
sympathetic activity in kidneys, adrenals and brown adipose tissue and results in increased vascular resistance
and blood pressure 22.At one time it was thought that adipocytes are the sole site of leptin production and
release. Evidence from studies in experimental animals and human now indicates that leptin is also derived from
non-adipose sites, one of these being the brain 22. NPY concentration is increased in hypothalamus in obesity,
and NPY has been implicated in effects of leptin on feeding behaviour.

2
Obesity, a burning problem
It has been suggested that there may be a two-way interaction between leptin and sympathetic nervous
system. Leptin acting within the hypothalamus causes activation of the central sympathetic outflow and
stimulation of adrenal medullary release of epinephrine. Conversely, sympathetic nervous system stimulation
inhibits leptin release from white adipose tissue 22, 23, 24. In obesity the sympathetic sensitivity of adipose tissue
is reduced and this factor may underlie the dysregulation of leptin production and other adipose tissue
secretions22, 23, 24.

VII.

OBESITY & MENOPAUSE:

Postmenopausal women have increased risk of metabolic syndrome including dyslipidaemia, insulin
resistance, hypertension and cardiovascular diseases. The pathology may be a direct result of ovarian failure or
an indirect result of central fat distribution associated with estrogen deficiency 25.
Menopause is associated with reduced energy expenditure during rest and physical activity, an
accelerated loss of fat free mass and alteration of adipose tissue metabolism and fat oxidation. Dysregulation of
energy metabolism can induce an increase in total adiposity and a redistribution of fat in the abdominal region in
postmenopausal women and increase fasting insulin levels. 26.
Comparative studies in postmenopausal and perimenopausal women, have shown that despite similar
fat cell size and ß-adrenergic receptor and post receptor (dibutyryl-cAMP)-stimulated lipolysis, basal lipolysis is
lower in gluteal adipose cells in postmenopausal as compared to perimenopausal women. AT-LPL activity in the
gluteal region is higher than in the abdominal region and in the postmenopausal females 27.
Menopause may result in endothelial dysfunction and increase in body weight and type II diabetes,
causing an increase in sympathetic activation. Sympathetic activation can result in increased release of renin and
Angiotensin II. Endothelial dysfunction is accompanied by reductions in nitric oxide (NO) and increases in
endothelin, which both contribute to salt sensitivity of Blood Pressure and may lead to increased oxidative
stress. All these factors may contribute to increase in renal vasoconstriction that may cause hypertension 28.

VIII.

AGE AND BODY FAT:

By 60 years body weight is 25 percent higher in males and 18 percent higher in females than in mature
young adults. After 60 years, body weight decreases rapidly returning to values comparable to young adulthood.
Effects of ageing on body composition are – increase in lipid fraction, loss of skeletal muscle and other
components of lean body mass 29. Ageing is a result of random mutations in the DNA of somatic cells, with
consequent introduction of cumulative abnormalities. Changes in body composition with ageing reflect a
decrease in lean body mass and an increase in body fat 29, 3.

IX.

TREATMENT:

The current NIH guideline recommend a decrease in calorie intake of 500 kilocalories per day for BMI > 25
but<35 and up to 1000 kilocalories per day for BMI>35 3.Dietary restriction increases LDL particle size, while endurance
training augments HDL particle size, with minimal weight loss 2. To decrease energy intake, diet should contain large
quantities of cellulose 2, 3.
Significant weight loss can be achieved with increased physical activity 1, 2, 3. Eating oat bran, which binds bile
acids, increases the proportion of cholesterol that forms bile acids rather than new LDL. Resin agents can be used to bind
bile acids in gut and increase their faecal excretion, thereby reducing cholesterol synthesis by the liver. Statins competitively
inhibits hydroxymethylglutaryl- coenzyme A Reductase, a rate limiting enzyme in synthesis of cholesterol 3.
Because of potential side effects, it is recommended that anti-obesity drugs only be prescribed for obesity where it
is hoped that the benefits of the treatment outweigh risks. Orlistat is currently approved for long term use. It reduces
intestinal fat absorption by inhibiting pancreatic lipase. Rimonabant, works via a specific blockade of the endocannabinoid
system. Sibutramine, which acts in the brain to inhibit deactivation of the neurotransmitters. Phentermine, is used medically
as an appetite suppressant. It is approved as an appetite suppressant to help reduce weight in obese patients when used for
short-term. FDA officially approved lorcaserin for use in the treatment of obesity for adults with a BMI equal to or greater
than 30 or adults with a BMI of 27 or greater who "have at least one weight-related health condition, such as high blood
pressure, type 2 diabetes, or high cholesterol". Topiramate has been investigated for use in treating obesity, especially to
reduce binge eating 30, 31, 32.

3
Obesity, a burning problem
Bariatric surgery should be considered for all patients with a BMI of more than 40 kg/m2 and for those
with a BMI of more than 35 kg/m2 with concomitant obesity-related conditions after failure of conventional
treatment. For patients that are obese but not extremely obese, sleeve gastrectomy is a suitable operation with
minimum risks. Two other most common surgical procedures to treat morbid obesity are gastric bypass and
gastric banding 3, 21, 33, 34.
Stress is an important risk factor for the emergence of metabolic syndrome. There are numerous
techniques available to reduce stress and produce relaxation. One of these, Jacobson’s Progressive Muscle
Relaxation technique, has shown positive clinical results and may be of help in reducing stress induced obesity
35
.
Conclusions: Obesity causes various harmful pathological changes in the body which needs to be studied
elaborately to prevent and control the epidemic of obesity.

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5

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A0401001005

  • 1. IOSR Journal 0f Pharmacy (e)-ISSN: 2250-3013, (p)-ISSN: 2319-4219 www.iosrphr.0rg Volume 4, Issue 01 (January 2014), Pp 01-05 Obesity, a burning problem 1, Dr. Arunima Chaudhuri, 2, Dr. Amit Kumar Bandopadhyay 1 Assistant Professor, Department of Physiology, Burdwan Medial College, Burdwan 713104, West Bengal, India. 2 Professor and Head of the Department of Anaesthesiology, Burdwan Medial College, Burdwan 713104, West Bengal, India. Abstract: Obesity, one of the greatest public health challenges of 21st century, is related to several chronic conditions such as type II diabetes, hypertension, dyslipaedaemia and cardiovascular diseases and renal pathologies. Individuals with increased abdominal obesity are found to have an atherogenic triad, associated with adverse cardiovascular outcomes. Human obesity is characterized by marked sympathetic activation. Adiposity is associated with chronic low-grade systemic as well as inflammation of the hypothalamus. In women, early onset of obesity favors the development infertility in the adult age. In men, obesity is associated with low testosterone levels, reduced spermatogenesis and erectile dysfunction. Lifestyle modifications, drugs & surgical intervention may prove to be fruitful in treatment of obesity. Keywords: Obesity, health hazards. I. INTRODUCTION: One of the greatest public health challenges in the first half of 21 st century is preventing the epidemic of obesity. In India obesity is most prevalent in urban populations (male = 5.5%, female = 12.6%), followed by the urban slums (male = 1.9%, female = 7.2%). Obesity rates are the lowest in rural populations (male = 1.6%, female = 3.8%). Obesity has reached epidemic proportions in India , with morbid obesity affecting 5% of the country's population. Socioeconomic class has an effect on the rate of obesity. As populations become more westernized, concerns about an obesity epidemic are on rise 1, 2. II. CLASSIFICATION OF OBESITY: Body mass index (BMI) is used by the National Institutes of Health's (NIH) to classify obesity, while the World Health Organization (WHO), uses body fat percentage. Using race or ethnic-specific BMI cut-off values can more accurately identify obesity in a population than the existing classification system 3, 4. For Asians population the values of BMI have been reset as their body composition is different from that of the western world 5. Proposed classification of weight by BMI in adult Asians: Underweight < 18.5; Normal range: 1 8. 5 - 22. 9; Overweight >23; Obese I: 2 5 - 2 9. 9; Obese II > 30. MRI and Bioelectric Impedance Analyzer for measuring body fat percentage have proven to be more useful. Based on cross-sectional analyses, it has been suggested that hip circumference divided by height (1.5) minus 18 (the body adiposity index, BAI), could directly estimate percent body fat without the need for further correction for sex or age. But other studies showed that estimates based on BAI are not more accurate than those based on BMI, waist circumference, or hip circumference6. III. OBESITY AND HEALTH HAZARDS: Obesity is related to type II diabetes, hypertension, dyslipaedaemia and cardiovascular diseases (CVD) 1, 2, 3, 7, 8. The endocannabinoid system (ECS) is involved in lipid metabolism and obesity. In obese individuals blood concentrations of the endocannabinoids anandamide (AEA), 2 arachidonoylglcyerol (2-AG), fatty acid amide hydrolase (FAAH) and monoacylglycerol lipase (MGL) changes. FAAH activity in subcutaneous adipocytes increases with BMI 9, 10. Polymorphism of 385 C/A of FAAH is associated with overweight and obesity while mutations have been found to improve cardiovascular profile 10. Adiposity is associated with chronic low-grade systemic inflammation as well as increased inflammation of the hypothalamus. Inflammation of hypothalamus may reduce the integrity of structures involved in reward and feeding behaviours8 and this may alter the feeding behaviors. In women, early onset of obesity favors the development infertility in the adult age. Obesity in women can also increase risk of miscarriages and impair the outcomes of assisted reproductive technologies and pregnancy. Polycystic ovary syndrome (PCOS) is the most common cause of infertility, affecting up to one in 10 women 3, 11. Insulin resistance, marked by persistently elevated insulin, abnormal regulation of blood sugar and insensitivity to insulin in the liver and muscle cells, occurs in PCOS. The pituitary gland actively responds to chronically high insulin levels, triggering a cascade of hormonal changes that disrupt ovarian function and impair fertility. With increased circulating insulin levels, the gonadotrophs in obesity start pumping out large amounts of LH, thus disrupting ovulation 11. In men, obesity is associated with low testosterone levels, reduced spermatogenesis and erectile dysfunction 3, 11. 1
  • 2. Obesity, a burning problem IV. DYSLIPIDEMIA OF OBESITY: In many overweight and obese patients hypertension, diabetes mellitus and hyperlipidemia occur together, greatly increasing the risk of atherosclerosis which may lead to heart attack, stroke and kidney diseases 3 . Adipose tissue lipid storage and processing capacity can be a key factor for obesity-related metabolic disorders. Morbidly obese patients have a lower gene expression of factors related with lipid uptake and processing 11, 12. Paraoxonase-1 (PON1) plays a significant role in the prevention of obesity-related accelerated atherosclerosis by hydrolyzing lipid peroxides in oxidized low-density lipoproteins. Obese subjects have increased oxidative stress and decreased PON1 activity 13. Increased proportion of small, dense LDL and HDL particles are associated with the risk of coronary heart disease (CHD) 1, 2, 3. Potential mechanisms that link small LDL particles to increased risk of vascular events are augmented oxidizability and increased permeability through the endothelial barrier. As for HDL, particle size, may involve the altered activity of lipases involved with the maturation and transformation of lipoproteins 1, 2, 3, 12. Direct adipose tissue free fatty acid (FFA) storage may contribute to body fat distribution. There is evidence of reduced storage proteins in those with greater visceral fat 14. The elevated Intramyocellular triglyceride (IMTG) concentration in obesity is accompanied by a increased capacity for fatty acid flux into the myocyte via an abundance of the key fatty acid transporter FAT/CD36 on the muscle membrane. Augmented intramyocellular fatty acid availability can increase triglyceride synthesis without altering the activity of key enzymes within the esterification pathway 15. Differential lipid redistribution through lipoproteins may affect body fat distribution. 16 Potential adipocyte specific rate-limiting steps include 1) facilitated FA transport across the plasma membrane, mediated by proteins such as CD36, plasma membrane-associated fatty acid-binding protein (FABP[pm]), and fatty acid transport protein 1 (FATP1); 2) acylation, 3) final step of triacylglycerol formation 14,15,16. V. EFFECT OF DISTRIBUTION OF BODY FAT AND INFLUENCE OF GENDER: Effect of body fat distribution on CVD can be explained by the hormonal and metabolic disturbances observed in abdominal obesity. As there are marked gender differences in regional body fat distribution, sex steroids are likely candidates for the determination of individual differences in body fat distribution and related metabolism 17, 18, 19. Abdominal obesity drives the progression of multiple cardiometabolic risk factors. This occurs through altered secretion of adipocyte-derived biologically active substances (adipokines), including free fatty acids, adiponectin, interleukin-6, tumour necrosis factor alpha, and plasminogen activator inhibitor-1. Typically, upper body obesity (android, ‘apple shape’ obesity) is more commonly found in men, whereas lower body obesity (gynoid, ‘pear shape’) is more commonly found in women. Upper body obesity receives contributions from adiposity in subcutaneous and intra-abdominal compartments. Individuals with increased waist circumference are found to have an atherogenic triad of elevated apolipoprotein B, fasting hyperinsulinaemia, and small, dense LDL, which are strongly associated with adverse cardiovascular outcomes 17, 18, 19. VI. OBESITY AND AUTONOMIC FUNCTIONS: Obese persons suffer from an increased mortality risk supposedly due to cardiovascular disorders related to either continuously lowered parasympathetic or altered sympathetic activation 20. Heart rate variation is reported to be reduced in obese individuals. Human obesity is characterized by marked sympathetic activation 21. A 10 percent increase in body weight above an individual’s usual weight is accompanied with a decrease in parasympathetic activity 21.This is one mechanism for cardiac arrhythmias that accompany obesity 21. Leptin is an anorexigenic hormone that influences the feeding and satiety centres in hypothalamus. Neuropeptide Y (NPY) is orexigenic and NPY containing neurons have their cell bodies in the arcuate nuclei of hypothalamus and project to the paraventricular nuclei 3. Higher sympathetic activity in obese individuals is related to higher leptin levels. Leptin increases sympathetic activity in kidneys, adrenals and brown adipose tissue and results in increased vascular resistance and blood pressure 22.At one time it was thought that adipocytes are the sole site of leptin production and release. Evidence from studies in experimental animals and human now indicates that leptin is also derived from non-adipose sites, one of these being the brain 22. NPY concentration is increased in hypothalamus in obesity, and NPY has been implicated in effects of leptin on feeding behaviour. 2
  • 3. Obesity, a burning problem It has been suggested that there may be a two-way interaction between leptin and sympathetic nervous system. Leptin acting within the hypothalamus causes activation of the central sympathetic outflow and stimulation of adrenal medullary release of epinephrine. Conversely, sympathetic nervous system stimulation inhibits leptin release from white adipose tissue 22, 23, 24. In obesity the sympathetic sensitivity of adipose tissue is reduced and this factor may underlie the dysregulation of leptin production and other adipose tissue secretions22, 23, 24. VII. OBESITY & MENOPAUSE: Postmenopausal women have increased risk of metabolic syndrome including dyslipidaemia, insulin resistance, hypertension and cardiovascular diseases. The pathology may be a direct result of ovarian failure or an indirect result of central fat distribution associated with estrogen deficiency 25. Menopause is associated with reduced energy expenditure during rest and physical activity, an accelerated loss of fat free mass and alteration of adipose tissue metabolism and fat oxidation. Dysregulation of energy metabolism can induce an increase in total adiposity and a redistribution of fat in the abdominal region in postmenopausal women and increase fasting insulin levels. 26. Comparative studies in postmenopausal and perimenopausal women, have shown that despite similar fat cell size and ß-adrenergic receptor and post receptor (dibutyryl-cAMP)-stimulated lipolysis, basal lipolysis is lower in gluteal adipose cells in postmenopausal as compared to perimenopausal women. AT-LPL activity in the gluteal region is higher than in the abdominal region and in the postmenopausal females 27. Menopause may result in endothelial dysfunction and increase in body weight and type II diabetes, causing an increase in sympathetic activation. Sympathetic activation can result in increased release of renin and Angiotensin II. Endothelial dysfunction is accompanied by reductions in nitric oxide (NO) and increases in endothelin, which both contribute to salt sensitivity of Blood Pressure and may lead to increased oxidative stress. All these factors may contribute to increase in renal vasoconstriction that may cause hypertension 28. VIII. AGE AND BODY FAT: By 60 years body weight is 25 percent higher in males and 18 percent higher in females than in mature young adults. After 60 years, body weight decreases rapidly returning to values comparable to young adulthood. Effects of ageing on body composition are – increase in lipid fraction, loss of skeletal muscle and other components of lean body mass 29. Ageing is a result of random mutations in the DNA of somatic cells, with consequent introduction of cumulative abnormalities. Changes in body composition with ageing reflect a decrease in lean body mass and an increase in body fat 29, 3. IX. TREATMENT: The current NIH guideline recommend a decrease in calorie intake of 500 kilocalories per day for BMI > 25 but<35 and up to 1000 kilocalories per day for BMI>35 3.Dietary restriction increases LDL particle size, while endurance training augments HDL particle size, with minimal weight loss 2. To decrease energy intake, diet should contain large quantities of cellulose 2, 3. Significant weight loss can be achieved with increased physical activity 1, 2, 3. Eating oat bran, which binds bile acids, increases the proportion of cholesterol that forms bile acids rather than new LDL. Resin agents can be used to bind bile acids in gut and increase their faecal excretion, thereby reducing cholesterol synthesis by the liver. Statins competitively inhibits hydroxymethylglutaryl- coenzyme A Reductase, a rate limiting enzyme in synthesis of cholesterol 3. Because of potential side effects, it is recommended that anti-obesity drugs only be prescribed for obesity where it is hoped that the benefits of the treatment outweigh risks. Orlistat is currently approved for long term use. It reduces intestinal fat absorption by inhibiting pancreatic lipase. Rimonabant, works via a specific blockade of the endocannabinoid system. Sibutramine, which acts in the brain to inhibit deactivation of the neurotransmitters. Phentermine, is used medically as an appetite suppressant. It is approved as an appetite suppressant to help reduce weight in obese patients when used for short-term. FDA officially approved lorcaserin for use in the treatment of obesity for adults with a BMI equal to or greater than 30 or adults with a BMI of 27 or greater who "have at least one weight-related health condition, such as high blood pressure, type 2 diabetes, or high cholesterol". Topiramate has been investigated for use in treating obesity, especially to reduce binge eating 30, 31, 32. 3
  • 4. Obesity, a burning problem Bariatric surgery should be considered for all patients with a BMI of more than 40 kg/m2 and for those with a BMI of more than 35 kg/m2 with concomitant obesity-related conditions after failure of conventional treatment. For patients that are obese but not extremely obese, sleeve gastrectomy is a suitable operation with minimum risks. Two other most common surgical procedures to treat morbid obesity are gastric bypass and gastric banding 3, 21, 33, 34. Stress is an important risk factor for the emergence of metabolic syndrome. There are numerous techniques available to reduce stress and produce relaxation. One of these, Jacobson’s Progressive Muscle Relaxation technique, has shown positive clinical results and may be of help in reducing stress induced obesity 35 . Conclusions: Obesity causes various harmful pathological changes in the body which needs to be studied elaborately to prevent and control the epidemic of obesity. 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