menopause, perimenopause, . · pdf filehoyte l. management of the menopause 2000. z. female...
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MENOPAUSE, MENOPAUSE, PERIMENOPAUSE, PERIMENOPAUSE, POSTMENOPAUSE.POSTMENOPAUSE.
Dr G. Girardet Nendaz, MDHôpitaux Universitaires de Genève,
Sept 2001
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PlanPlan
General considerations about agingDefinitionsEndocrinology of the perimenopauseEndocrinology of the menopauseEstrogen Deficiency– Symptoms and signs– The Brain– The Bones– Cardiovascular system
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AgingAging
• 1650 mio of human being in 1900• 6168 mio of human being in 2000
• In the next 25 years in western countries– People over 65 will increase from 82 % – Newborn will increase from 3 %– People 20 to 65 will increase from 46 %
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Aging and Quality of LifeAging and Quality of Life
• There is some interest to maintain our old population in good health, by– exercise– stop smocking– not much of alcohol– control obesity
– Good Quality of Life allows Choices
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DefinitionDefinition
• Menopause: permanent cessation of menstruation following the loss of ovarian activity. 12 months.
• Median age: 50 to 52 years old
• Post hysterectomy: FSH > 30-60 U/l
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DefinitionDefinition
• Perimenopause :– Period of time where a woman passes from the
reproductive stage of life to the menopause.
– May starts about 8 years before menopause.
– Marked by irregular cycles and climacteric symptoms.
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From the endocrinologicFrom the endocrinologicpoint of viewpoint of view
• Menopause is the end point of a process.– Hormones are stable– Take care of the long term consequences of
hypoestrogenisme.• Perimenopause is an on going process
– Hormones are fluctuating– Key word is “variability”– Take care of the short term consequences
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Premature ovarian failurePremature ovarian failure
• POF = before 40 years old
• Many causes:– Genetics: premutation of chrom. X– Enzymatic– Physical agents (radiotherapy; anticancer)– Immunologic– Failure of FSH/LH– Idiopathic
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Premature menopause (POF)Premature menopause (POF)
• Age of menopause genetically determined(X chromosome)
• Dx made by hormonal profile• Ovarian volume (ultrasound) may
distinguish simple POF from insensitive ovary syndrome (“immunological”)
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The Endocrinology of the The Endocrinology of the PerimenopausePerimenopause
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Physiology of the menstrual Physiology of the menstrual cyclecycle
• D1-D14: follicular phase
• D14: ovulation
• D14-D28: luteal phase
• Ovarian secretion• Adrenal secretion
• FSH / E2
• LH / A / T
• P / E2
• E2,E1, P, A, DHEA, T• DHEAS,DHEA, A T
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Regular menstrual cycleRegular menstrual cycle
• Related to the number of ovarian follicules• Reduction by atresia
– 7 mio of oocytes at 20 weeks of gestation– 2.5 mio of follicules at birth– 400 000 at the time of menarche.
• Necessity of normal hypothalamus, pituitary gland, ovary, cortex, thyroid and adrenal
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PerimenopausePerimenopause
• Age related alterations start at approximately 42-44
• Ovarian production of proteins affected first (clinically silent)
• Ultimately, ovulation disorders result in dysfunctional breakthrough bleeding (Pre/peri-menopause)
• DUB may be associated with hyperplasia
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Perimenopausal transitionPerimenopausal transition
• Decreased stocks of ovarian oocytes
• Decreased Inhibin
• Ovulation/ Anovulation
• FSH
• Normal E2- P or E2 , normal P or E2/P
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The Endocrinology ofThe Endocrinology ofthe Menopausethe Menopause
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Menopause and hormonal Menopause and hormonal modificationsmodifications
• Postmenopausal hormonal profile:– FSH > 30 U/l– LH > 15 U/l– E2 < 40 pg/ml
• Ovarian production:– T stays unchanged, DHEA and A decrease
• Adrenal production:– Decreased DHEA and A
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Source of estrogen at the Source of estrogen at the postmenopausepostmenopause
• Not from the ovary
• From peripheral conversion in the adipose tissue– Androstenedion to Estrone– Testosterone to Estradiol
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Hormone MeasurementsHormone Measurements
• Not helpful when menopause occurs at expected age
• Reflect instant status, fluctuate a lot• Hormonal profile helps to clarify premature
symptoms• Can not accurately predict fecundity• Ovarian volume (ultrasound) is helpful
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Estrogen DeficiencyEstrogen Deficiency
Symptoms and signsBrain
Cardiovascular systemBone
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Symptoms and SignsSymptoms and Signs
Hot Flashes
Psychological functioning
Vulvovaginal and urinary disorders
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Incidence of Hot FluschesIncidence of Hot FluschesMayas Indians: 0 %Chineses from Hong Kong 10-22 %Japaneses 17 %North American 45 %Netherlands 80 %
Research on the menopause in the 1990s Technical report of a WHO Scientific group
No 866, 1996
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Hot Flashes (HF)Hot Flashes (HF)• Emblematic symptom for menopause• Episodic phenomenon with:
– upper body vasodilatation– intense perspiration– unpleasant psychological symptom(s)
• Up to one every 60 minutes, timely related episodic LH elevations
• Only after prior exposure to E2• Aggravated by hot climate
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Hot Flashes (HF)Hot Flashes (HF)
• Episodic resetting of thermostat after progressive upward slide of Basal Body Temperature (BBT) reference– Ends when BBT reaches new lower setting
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Psychological functioningPsychological functioning
Depressive symptomsMemory difficultiesConcentration difficultiesSleep disordersDecrease of sexual interest– 30-50 % of the general menopausal population
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Psychological FunctioningPsychological Functioning
Natural menopause doesn’t increase the risk of depression (longitudinal studies)
Kaufert PMaturitas 1992 ;14: 143
However
65 % of women attending “menopause clinics”had varying degrees of depression
Anderson E Am J Obstet Gynecol 1987; 156:428
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Effect of estrogen deficiency Effect of estrogen deficiency on the urogynecologic mucosaon the urogynecologic mucosa• Vaginal atrophy leading to vaginal dryness
• Urethral mucosa atrophy leading to pollakiuria
• Bladder mucosa atrophy leading to urge incontinence
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Incidence of urinary Incidence of urinary incontinenceincontinence
Depending on what population is studiedWalking in clinics:
– 489 women 50-64 yo 30 %– 285 women attending “menopause clinics”:
45 % stress 21 % urgeHoyte L. Management of the menopause 2000
Female Nursing home residents 50%
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Vulvovaginal and urinary Vulvovaginal and urinary disordersdisorders
Effects of Estrogens
E receptors found on urethral and bladder mucosa
E2 increase elasticity by collagen synthesis
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Effects of sex steroids on the Effects of sex steroids on the BrainBrain
For reproductive functions– Neuroendocrine hormone release– Behavior
For non reproductive functions– cerebral lateralisation– response of the brain to injury– cognitive performances
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Neurobiologic effects of Neurobiologic effects of EstrogensEstrogens
Direct– alteration of the electrical activity of the
hypothalamusInductive– induction of the RNA/protein synthesis
changes in a specific gene product, such as neurotransmitter synthesizing enzymes.
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Where to find Estrogens Where to find Estrogens receptorsreceptors
PituitaryHypothalamus ( ERα / ERβ )
Limbic Forebrain ( ERα > ERβ )Cerebellum ( ERβ )
Cerebral Cortex ( ERα > ERβ )Brain StemSpinal Cord
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The BrainThe Brain
Effects of EstrogensIncrease synaptic density in the hippocampus
(limbic sys. structure for memory)Increase neurotransmitters activity
(acetylcholine)Increase the rate of degradation of MAOStimulate neurons growth reparation
Act as an antioxydant
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Effect of estrogen deficiency Effect of estrogen deficiency on the CNSon the CNS
• Hot flushes• Sleep disorders• Loss of memory• Fatigue• Irritability
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Estrogen DeficiencyEstrogen Deficiencyandand
The BonesThe Bones
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Bone mass and osteoporosisBone mass and osteoporosis
• Bone: constant remodeling• Bone mass reflected by: bone formation
bone resorption• Remodeling is important in:
– Maintaining the vitality of the squeleton– Maintaining the capacity to resist stress– Contributes to calcium homeostasis
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DefinitionDefinition
Osteoporosis– Bone mass below the range expected in young
healthy adult (20-30 years old) of the same sex.
– Statistically, BMD more than -2,5 SD from the peak bone mass.
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Estrogen deficiency and BoneEstrogen deficiency and Bone
• Gonadal failure increases bone resorption– More remodeling sites are activated– More bone is removed than synthesized
• Biochemical markers of the bone remodeling increased in urine:– Desoxypiridinoline, Hydroxyproline, Calcium
Bone loss leads to osteoporosis
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Estrogen deficiency and BoneEstrogen deficiency and Bone
Bone loss occurs at a rate of 2 to 3 % per year in early menopauseBone loss continues during the next yearsBone loss accelerates in older age
Decreased intestin absorption of CalciumIncreased renal loss of Calcium
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Where to find Estrogens Where to find Estrogens receptorsreceptors
OsteoblastsOsteoclasts
Mononuclear cells
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Estrogen DeficiencyEstrogen Deficiencyandand
Cardiovascular DiseaseCardiovascular Disease
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Coronary Heart Disease Coronary Heart Disease (CHD)(CHD)
• Lower CHD incidence in women before menopause
• After menopause, similar CHD incidence in men and women
• Ovarian function protects against CHD
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Effects of Estrogen on Effects of Estrogen on Coronary ArteryCoronary Artery
Animal Model studies provided indirect evidence regarding the effets of endogenous sex hormones on atheroscerosis extent.
Adam MR Atheroscerosis 1985; 5:192-200
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Animal studies: coronary plaque Animal studies: coronary plaque extent in four groups of cynomolgus extent in four groups of cynomolgus
monkeys modelmonkeys model
00.020.040.060.08
0.10.120.140.160.18
0.2
male ovx fem non pregn pregnant
plaque size
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Effects of Estrogen on Effects of Estrogen on Lipoprotein MetabolismLipoprotein Metabolism
On LDL-lipoprotein– Increased catabolic rate of LDL– Increased hepatic receptors of LDL
On HDL-lipoprotein– Increased HDL-lipoprotein synthesis– Decreased HDL clearance– Reduced hepatic receptors of HDL
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Effects of Estrogen Deficiency Effects of Estrogen Deficiency on Lipid profileon Lipid profile
• Increased total cholesterol (CHOL)• Increased Low density lipoproteins (LDL)• Increased triglycerides (TG)
Matthews KA N Engl J Med 1989; 321 641
• Decreased High density lipoprotein (HDL)MORE ATHEROGENIC
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Effects of Estrogens on the Effects of Estrogens on the Arterial CirculationArterial Circulation
• Estrogen receptors on • endothelial cell• on smooth muscle cells
• Vascular relaxation on– Coronary arteries– Peripheral : brachial, carotid arteries– Cerebrovascular arteries
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Effects of Estrogens on Effects of Estrogens on Coronary EndotheliumCoronary Endothelium
Ach-induced vasoconstriction is abolished by an infusion of E2; gender dependent.
– Collins P Circulation 1995; 92: 24
This effect is caused by NO.Guetta V Circulation 1997;96: 2795
This effect may be dependent on ERα.– On cultured human ombilical, aortic, coronary
endothelial cell.Venkov CD Circulation 1996;94: 727
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Effects of Estrogen on Effects of Estrogen on Coronary Smooth Muscle cellsCoronary Smooth Muscle cells
In vitro and animal studies
Supraphysiologic concentration of E2 (> 0,1 µmol/L
Mediated by potassium or calcium channelSudhir K J Am Coll Cardiol 1995 ; 26 (3):807
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Estradiol (E2) and Coronary Estradiol (E2) and Coronary Heart Disease (CHD)Heart Disease (CHD)
• Oral E2 increases HDL and lowers LDL• E2 induces direct vasoactive effects (NO
and non-NO mediated)• E2 decreases smooth muscle proliferation• E2 improves vascular reactivity
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PlanPlanGeneral considerations about agingDefinitionsEndocrinology of the perimenopauseEndocrinology of the menopauseEstrogen Deficiency– Symptoms and signs– The Brain– The Bones– Cardiovascular system
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ConclusionsConclusions
• Menopause is a physiologic event.– women who are not symptomatic don’t seek
medical advice.
Menopause coincides with middle age– increased incidence of CHD– increased incidence of cancer– increased incidence of osteoporosis
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ConclusionConclusion
Estrogen deficiency is responsible for– alteration of the quality of life by
alteration of mood disorderssleep disordersuroggynecologic symptoms
– osteoporosis– more atherogenic lipid profile
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ConclusionConclusion
Estrogen deficiency may be responsible for– Increased incidence for CHD– decreased cognitive fonction– decreased memory
Is Estrogen deficiency responsible for– Alzheimer disease ?– Parkinson disease ?
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ConclusionConclusion
Menopause is the opportunity for women– to be screened for age related diseases
cardiovascular risks factorscancerosteoporosis
– to receive medical advise about health care
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