Lecture of Physiology of Aging versi 2.pdf

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Prof.dr.Hardi Darmawan, MPH&TM, FRSTM, AIF 1 Sriwijaya Medical School Palembang, South Sumatra - Indonesia

Transcript of Lecture of Physiology of Aging versi 2.pdf

  • Prof.dr.Hardi Darmawan, MPH&TM, FRSTM, AIF

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    Sriwijaya Medical SchoolPalembang, South Sumatra - Indonesia

  • Greta Garbo

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  • Indonesian Life Expectancy2000 2005 : 67.8 years

    2020 2025 : 73.6 years

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    Saparman,Sragen (143 yrs) Mak Encuh, Bandung (131 yrs)

  • Aging is not an inevitable process leading to disease and

    deterioration4

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  • NORMAL AGING

    Despite stereotype most of the elderly age well !

    Most of our images are based on the frail sub-set who frequently use medical services

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  • Normal Aging

    Generally normal aging in associated with a reduction in functional reserve capacity in tissues and organs.

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  • Normal Aging

    At advanced age more common to see evidence of impaired homeostasis and response to external insults e.g. illness.

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  • Temperature Regulation and Aging

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  • Risk Factors for Hypothermia in Elderly

    Decreased thermogenesis

    Decreased vasoconstriction in response to cold

    Decrease in intensity of shivering

    Medications e.g. Chlorpromazine

    Socio-economic (nutrition, heating, etc)

    Co-morbidities including falls / immobility

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  • Decreased ability to sweat

    Decreased ability to redirect heat :

    Reduced capacity for vasodilation peripherally

    Modest ability to increase cardiac output

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    Risk Factors for Hypothermia in Elderly

  • Summary of Normal Aging Changes

    Despite stereotype most of the elderly age well!

    Most of our images are based on the frail sub-set who frequently use medical services

    Generally normal aging in associated with a reduction in functional reserve capacity in tissues and organs

    At advanced age more common to see evidence of impaired homeotasis and reponse to external insults eg. Illness.

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  • Characteristic of AgingMortality increases exponentially

    Biochemical composition of tissue changes

    Physiologic capacity decreased

    Ability to maintain homeostasis diminishes

    Susceptibility and vulnerability to disease increases

    Environmental and Genetic factors influence

    the rate of age

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  • Characteristic of Aging

    Loss of physiologic reserve and decreased homeotatic control may result from :

    Allostatic load (persistent activation of normal neuroendrocrine, immune and autonomic responses to stress)

    Development of homeostasis (altered response to physiologic stresses)

    Changes are generally irreversible

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  • Theories of Aging : Oxidative Stress

    Synopsis : Oxygen converted during metabolism causes protein, lipid and DNA damage over time

    In support :

    Mutations in oxidative stress pathway can extend life span

    Mutations in other pathways that increase longevity resist oxidative damage

    In opposition : antioxidants do not delay human senescence or disease

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  • Systemic Inflammatory = Silent, Minimally Persistent InflammationAA, arachidonic Acid (Omega 6) high in

    contemporary diet Higher AA in cell membranes

    AA reacts avidly than EPA with cyclo-oxygenase enzyme

    AA-eicosanoids > EPA-eicosanoids systemic inflammation

    Silent inflammation = inflammation without the 5 cardinal signs

    Pain, red, swell, heat and loss of function

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  • Glycation Theory

    Occurs in everyone, but a faster rate in diabetics

    Reaction with glucose with macromolecules

    Devastating effects on macromolecules

    Condition related to AGE

    Senile dementia

    Vascular Stiffening

    Cataract

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  • Oxidative Stress Bodily Damage

    Heart disease

    Hypertension

    Cancer

    Inflammatory bowel disease (IBD)

    Arthritis

    Diabetes

    Alzheimers disease

    Stroke

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  • Free Radical TheoryOxidative Stress = Free Radicals > Antioxidants Effect

    Free Radical overactivity

    Imbalance between antioxidant Free radicals

    Oxidative stress

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  • Free Radical TheoryOxidative Stress = Free Radicals > Antioxidants

    Accelerated Aging

    Diabetes

    Sun exposure

    Poor Nutrition

    Stress

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  • Physiology of Aging

    Why do we need to know the physiology of aging?

    to tell the difference between physiological and pathologicalphenomena in the geriatric population

    To appreciate the impact of normal age-related degeneration on diseases and their management.

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  • Goals of Successful Aging

    Compression of debilitating disease into final portion of life

    Maintain high-level of function until end of life

    Death with dignity and comfort

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  • Health ModelAnti aging internal health

    Aesthetic external health

    Regenerative - rejuvenation

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  • Why do we age?2 categories of theories :

    Aging events occur randomly and accumulate in time : Stochastic Theory

    Accumulated errors in making bodily and cell proteins Error Catastrophe Theory

    Cross-linking of big molecules such as proteins accumulates over time Cross-linking theory

    Repeated damage to DNA and incomplete repair wear and Tear Theory

    Aging is inevitable : Nonstochastic Theory26

  • Why do we age?

    2 categories of theories :

    Aging is inevitable : Nonstochastic Theory

    Certain organ-systems such as hypothalamus, immune and neuroendocrine systems have in-built pacemakers that involute with agepacemaker theory

    There is familiar predisposition for longevity and thus there may be a genetic basis for aging genetic theory

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  • SarcopeniaBetween ages 30 and 75:

    Lean body mass decreases due to loss of skeletal muscle mass

    Number and size of muscle fibers progressively decrease.

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  • Endocrine Changes with Aging

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  • Hormone Deficiencies many if not most of the signs, complaints, causes of Senescence

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    Age-related

    physiology :- Intestinal transit- cardiac output- kidney function- liver function

    Age-related signs :- wrinkles- skin & hair thinning- hair loss- muscle atrophy- abdominal obesity

    Age-related symptoms :

    - fatique- cognition

    - depression

    Age-related

    diseases :- cardiovascular- cancer- obesity- diabetes- osteoporosis- dementia

  • 5 Strategies of Healthy Aging

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  • Balanced Diet

    Energy intake 50/25/25

    50% Carbohydrate fruits & vegetables

    25% Protein 2/3 plant, 1/3 meat preferably fish

    25% Fat (mono & poly) unsaturated

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  • Balanced Anti Aging Diet

    Caloric restriction Keep low end of ideal body weight

    Okinawan diet

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  • Okinawan Diet 7 servings of vegetables

    7 servings of grains

    4 servings of fruits

    Abundance of soy

    3 times per week fish

    Alcohol in moderation

    Low caloric diet

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  • Positive Food Intake

    Fruits Minerals & Vitamin

    Vegetables Fibres & Phytonutrients

    Spices Hormone modulator, Cancer Preventive

    Mushrooms/Ginsengs -Adaptogen

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  • Killer Intake - Delicious

    Avoid high fat, salt, sugar

    Avoid trans fatty acid cooked fat

    Avoid acralamide heated carbohydrate

    Avoid preservatives & additives

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  • Colour Agents

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  • Dietary Risk Factors

    American Cancer Society Study

    150000

    20 year study

    53% higher risk of distal colon cancer in red meat eater

    John Hopkins Bloomberg Study

    Higher sugar intake increase cancer risk

    Eat nut & Beans

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  • Hydration

    Drink liquids (ml) = 33 x body weight (kg)/day

    Hydrate before during & after exercise

    Test hydration status

    Specific gravity - 1020

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  • Precision of Anti Aging Exercise

    Exercise to be stronger, younger & healthier

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  • Aim of Anti Aging Exercise

    Balance Coordination

    Strength: Muscular Cardiovascular

    Stretch: flexibility, posture & range of motion

    Better circulatory system

    Lymphatic massage

    Mental alertness

    Degenerative Disease Prevention

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    Balance

  • Musculoskeletal Composition & Deterioration in Aging

    30 year old 75 year old

    30% - muscle 15% - muscle

    20% - adipose tissue 40% - adipose tissue

    10% - bone 8% - bone

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  • Types of ExerciseFive main types of exercise

    Strength build muscle, HGH stimulation

    Aerobics cardiopulmonary conditioning

    Intervals accommodate heart size to demand

    Stretching flexibility

    Eastern balance & coordination

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  • Osteoporosis and Fractures

    Low dietary intake of calcium

    Loss of endocrine protection

    Reduced endogenous production of vitamin D

    Disuse

    Disease Chronic Renal Disease, Rheumatoid Arthritis, Thyroid Disease

    Medications Steroids, Thyroxin.

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  • Osteoporosis

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    Age related disorder,

    aging disease major morbidity/mortality

    atherosclerosis CV diseases

    metabolic syndrome

    tumors

    neurodegenerative diseases

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    Asymptomatic bone fracture & complication

    bone mineral density

    Loss of architectural integrity

    Should understand physiologypathophysiology

    Immuno senescence & inflammatory of aging

    Immuno senescence lifelong antigenic load chronic immune system activation

    proinflammatory

    till

    Fragility fracturerisk

    hyper

    production

    Osteoporosis

  • Proinflammatory cytokines - IL-1, IL-6, TNF inverse CRP

    Immuno senescence shape the same immunological cell & cytokine

    TNF, IL-1, Rank-L, M-CSF expression osteoclast precursor

    Why not build the osteoblast

    aging & estrogen deficiency : most important risk - osteoporosis

  • Immune Mechanism of Osteoporosis

    The skeleton is physiologically in a state of dynamic equilibrin between

    formation vs reabsorption

    osteoblasts vs osteoclasts

    tuning by cytokins

    growth factors

  • accumulation Age immune profile

    memory/effector cells expressing

    Rank L resident in bone

    secreting

    osteoclastogenic

    proinflammatory cytokins

  • Natural Bone Building Plan

    1. Hormones

    2. Minerals

    3. Vitamins

    4. Diet

    5. Digestion

    6. Exercise

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    HormonesVit D is a steroid hormones

    Determinant for bone

    health & all ages determinant

  • Summary of Hormones to treat bone loss (1)

    1. Estrogen to prevent bone loss : estradiol transdermal titrated area 1 mg/ml

    2. Progesterone To build bone & balance estrogen

    50-300mg oral / transdermally53

  • Summary of Hormones to treat bone loss (2)3. DHEA/testosterone

    Start DHEA (5-25 mg/day)

    Testosterone 1-5 mg/night

    4. Melatonin (0.5 3 mg/night)

    5. GH if IgF -1 low or below mid range

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  • Summary of Vitamins to treat Bone Loss

    1. Vitamin D3 2000-5000 u/d

    2. Vitamin K2 50-150 mcg/d

    3. Vitamin C 1000mg 4000mg/d

    4. Vitamin B 100mg/d, if homocysteine not

    improving use Methyl B12/ folic acid

    5. Vitamin E 200-800 U

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  • 1. Magnesium

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    Summary of Mineral to treat Bone Loss

  • Diet & Bone Health Enzyme function optimally at PH neutral

    Acidic by products accelerate bone loss

    High protein & diary (western diet) chronic metabolic acidosis

    Bones ability to neutralize acid load -- depend on KT

    stores

    K+ intertitial fluid

    K+ Ca++ from bone to buffer in a place of KTchronic high steroids

    diuretics

    Eating alkaline diet

    Rich fresh fruit vegetables

    Limited protein & diary

    Artificial sweetness

    Preservatives 57

    KT

  • Acidifying FoodsSugar

    Yeast, wheat breads

    Soft drinks, alcohol, tea, coffee

    Cranberries

    Sweet potato

    Salt

    HOPS

    Corn oil

    White balsamic vinegar

    Saccharine, aspartame benzoate

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    Alkalinizing Foods

    Honey, maple syrup, stevia

    Goats milk

    Soy milk

    Umeboshi plums

    Sea salt

    Most herbal teas

    Lemon, limes, grapefruit, onion

    Olive oil

    Miso

    Most fruits & vegetables

  • Healthy Ageing

    L

    Unhealthy Ageing

  • Mrs. B.Gozali,MD 84 years oldShe was doing her flying fox (30 meters height from ground).

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    Implicated in

    SIRT1

    Audrey Hepburn

    is

    a

  • SIRT 1

    A key mediator of beneficial effects of :

    Caloric restriction

    Regulates lipid

    Regulates glucose

    Regulates metabolism

    By deacetylating metabolic regulators

    SIRT1 levels are regulated by microRNAs (miRs)

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    Telomerase Theory of Aging

    Geron Corporation (Menlo Park, California)

    Telomeres : sequences of nucleic acids extending from the ends of chromosoms

    Telomeres : maintain integrity of chromosoms

    Telomeres shortened cellular damage

    Cellular death

    aging

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  • with unhealthy aging and a shorter life span

    Telomeres from the ends of human chromosome

    Telomeres shortened limit proliferation of human cells, by inducing :

    Replicative senescence

    Differentiation

    Apoptosis

    Increasing cancer risk

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    Telomere Shortening & Aging (2007). H.Jiang, Z.Ju, K.L Rudolph: Z Gerontol. Geriat 40:314-324

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  • Short Telomeres have been associated with maladies in these tissue :

    Immune cells-memory and nave

    Heart cardiomyocytes

    Hematopoietic stem cells

    Lung alveolar cells

    Skin dermis, epidermis, vasculature

    Vascular intima (endothelium)

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    Osteoblasts, MSCs

    Retinal pigmented tissue of eye

    Chondrocytes

    Skeletal muscle

    Kidney cortex

    Neurons

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    The Seven Step Program :

    1. Nutritional Modification2. Nutrient Supplementation3. Herbs4. Pharmaceuticals5. Hormone Replacement Therapy6. Mental Training7. Mind / Body Exercise

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    Maria Olivia da Silva

    132 tahun

    Brasil

    Lahir : 28 Feb 1880

    2 x menikah

    Anak 14

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