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Estrogen Lecture
Rich
172
Medical
Kindergarten
04/25/2010

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Term
What does SERMS stand for?
Definition
Selective Estrogen Receptor Modulators
Term
What does SERDS stand for?
Definition
Selective Estrogen Receptor Down Regulators
Term
What results from the Pulsatile release of GnRH from the Hypothalamus?
Definition
Triggers LH and FSH release from the Pituitary Gland which will trigger Estrogen Production
Term
What feedback inhibits the release of GnRH by the hypothalamus?
Definition
Estrogen
Term
What are the Estrogen levels in a young female?
Definition
Low
Term
What happens at puberty to estrogen levels?
Definition
Pulse Generator of GnRH turns on leading to increased LH/FSH/Estrogen
Term
What is happening during the Follicular phase of a adult womans cycle?
Definition
Pulsatile Fluxuations
Term
What happens during the Luteal Phase of an adult womans cycle?
Definition
Surge of LH which triggers an increase in Estrogen and Progestin
Term
What happens to Estrogen levels around 50 years old in a Woman?
Definition
Estrogen levels Decrease (Menopause)
Term
What does the drop in estrogen at age 50 in women do to LH/FSH levels?
Definition
Without the Feedback inhibition these Levels Sky Rocket
Term
In menses what is the first phase?
Definition
Follicular Phase
Term
What happens int the Follicular phase?
Definition
Slow rise in LH which leads to Increase in Estrogen
Term
What triggers the transition from Follicular phase to Luteal Phase?
Definition
Estrogen levels get so high they change from Negative Feedback to Positive feedbakc which Leads to a Surge in LH
Term
What does the surge in LH lead to?
Definition
Ovulation
Term
When is the Corpus Luteum formed?
Definition
Ovulation
Term
What does the Corpus Luteum produce?
Definition
It produces Progestins
Term
Which hormone helps the proliferation of the endometrium?
Definition
Estrogen
Term
What halts the proliferation of the Endometrium and leads to Vascularization?
Definition
Progestin
Term
Why is the Endometrium vascularized?
Definition
To prepare for the implantation of the Blastocyst
Term
What hormone is responsible for the rise in temperature a Woman experinces as they approach ovulation?
Definition
Progestin
Term
Where does LH bind to trigger the formation of Estradiol?
Definition
Theca Cells
Term
What happens when LH binds in the Theca Cells?
Definition
Adenyl Cyclase/cAMP/PKA triggers expression of Proteins for Testosterone Synthesis
Term
What happens to the Testosterone Androstenedione after its produced in the Theca Cells?
Definition
Diffuses into the Granulosa Cells
Term
What enzyme is highly active in the Granulosa Cells?
Definition
Aromatase
Term
What is the action of Aromatase in the Granulosa Cells?
Definition
Converts Testosterone into Estradiol
Term
What determines the amount of Aromatase in Granulosa Cells?
Definition
FSH via PKA
Term
How does Estradiol travel in the blood?
Definition
Bound to Albumin and SHBG, 2% is Free
Term
What are the physiologic functions of Estrogen?
Definition
Libido, Feminization, Endometrial Development, Bone Antiresorption, Closre of Epiphyses, Nitrogen Balance, Water Retention, and Protein Synthesis by the Liver
Term
What two receptors does Estrogen bind to?
Definition
ER beta and ER alpha
Term
What happens to the receptor when Estrogen binds?
Definition
Dimerization and expression of specific genes
Term
Do all types of Estrogen Receptors bind with the same affinity?
Definition
No leads to Specific Actions
Term
What are the two SERMS?
Definition
Tamoxifen and Raloxifene
Term
What is the overall action of SERMS?
Definition
Can be estrogen Agonist or Antagonist depending on what tissue its in
Term
What is the action of SERDS?
Definition
Selectively down regulate the expression of Estrogen Receptors in tissues
Term
What are the 17Beta-esters?
Definition
Estradiol valerate and Estradiol cypionate
Term
How are these 17Beta-esters administered?
Definition
IM since HIghly Lipophilic
Term
What are Estradiol Valerate and Estradiol Cypionate used for?
Definition
Hormone Replacement Therapy
Term
What are the 17Alpha-Substituted Estrogens?
Definition
Ethinyl Estradiol and Mestranol
Term
Are Ethinyl Estradiol and Mestranol orally active?
Definition
Yes
Term
What are Ethinyl Estradiol and Mestranol typically used as?
Definition
Birth Control pills since very slowly metabolized by the liver
Term
What are the Conjugated Estrogens?
Definition
Na+Estron Sulfate and Na+Equillin Sulfate
Term
What are the conjugated Estrogens purified from?
Definition
Horse Urine Hence Equillin
Term
What are the conjugated Estrogens typically used for?
Definition
Hormone Replacement Therapy and Vaginal Atrophy
Term
What drug was widely used to prevent miscarriages?
Definition
Diethystilbestrol (DES)
Term
What was the problem with DES?
Definition
Female offspring Developed Vaginal and Cervical Cancer
Term
What is used in combo with Ethinyl Estradiol and Mestranol in Birth Control?
Definition
Progestins
Term
What would happen if only estrogen was used?
Definition
Unimpeded Endometrial Growth and Cancer
Term
Can estrogens be used to trigger Puberty?
Definition
Yes in 14-15 year olds
Term
What is the problem with inducing puberty with Estrogen?
Definition
Leads to closing of epiphyseal plates early if Max Height isnt already reached
Term
What hormone can be used to treat Prostate Cancer and Dysmenorrhea?
Definition
Estrogen
Term
What other than SSRIs can be used to treat Emotional Distress?
Definition
Estrogen Oral Contraceptives
Term
What is the effect of Estrogen on Osteoporosis?
Definition
Positive Effect
Term
What can be used to treat vaginal Atophy?
Definition
Estrogen
Term
What are the side effects of Estrogen Therapy?
Definition
Nausea, Weight Gain, Edema, Endometrial Cancer, Cervical Cancer, Thromboemboli, Increased Blood Pressure, Gall Bladder Disease, and Risk of Breast Cancer
Term
What is more likely to cause breat cancer Estrogen Alone or Estrogen with Progestins?
Definition
Estrogen with Progestins
Term
What iss estrogen replacement therapy a risk factor for?
Definition
Heart Disease, Stroke, and Breast Cancer
Term
What does Estrogen Therapy greatly increase rick of?
Definition
130% increase in Pulmonary Embolism
Term
What can estrogen decrease the risk of?
Definition
Hip Fracture, Colon Cancer, and Uterine Cancer
Term
What are the physiological Antagonists of Estrogen?
Definition
Progesterone and Testosterone
Term
Where does Progesterone work as a Estrogen antagonist?
Definition
Feedback inhibits Hypothalamus and Pituitary also works in the Uterus
Term
What are the SERMs?
Definition
Tamoxifen, Clomiphene, and Raloxifene
Term
What is used to treat Estrogen Receptor Positive Breast Cancer?
Definition
Tamoxifen
Term
What is a side effect of Tamoxifen?
Definition
Can Cause endometrial Cancer due to Agonist activity in this Uterus, also Blood Clots
Term
How long is Tamoxifen usually used?
Definition
5 years
Term
What is the effect of Tamoxifen on liver enzymes?
Definition
Estrogenic Positive
Term
Why is Tamoxifen only used for 5 years?
Definition
By that time Increased Risk of Blood Clot out weighs Breast Cancer Benefits
Term
What drug is used to induce Ovulation in women with intact ovaries?
Definition
Clomiphene
Term
Can Clomiphene be used in patients with venous thrombolytic disorders?
Definition
No
Term
How long is Clomiphene used for before the negatives outweight the Positives?
Definition
Up to 1 year
Term
What drug is used to treat Osteoporosis?
Definition
Raloxifene
Term
Where does Raloxifene have agonist effects?
Definition
In the Bone and Lipid Metabolism, so good for Cholesterol
Term
Where does Raloxifene act as an Antagonist?
Definition
Brain, Breast, and Uterus
Term
What drug is used prophalactically for breat cancer?
Definition
Raloxifene
Term
How long can Raloxifene be used to reduce risk of breast cancer?
Definition
5 years
Term
What are the Selective Estrogen Receptor Downregulators?
Definition
Fulvestrant
Term
What is the 7-alpha alkylamide derivative of estradiol?
Definition
Fulvestrant
Term
What is the MOA of Fulvestrant?
Definition
Prevents Dimerization of Estrogen Receptors
Term
What type of cancer is Fulvestrant useful in treating?
Definition
Tamoxifen Resistant Breast Cancer and possible Estrogen Receptor Positive Ovarian Cancer
Term
How is Fulvestrant administered?
Definition
IM infection Monthly
Term
What are the Aromatase Inhibitor?
Definition
Aminogluthemide, Formestane, Exemestane, and Anastrozole
Term
Why is Aminogluthemide no longer used?
Definition
Inhibits the Synthesis of Adrenocortical Steroids
Term
What is given with Aminogluthemide to combat Adrenocortical Steroid Inhibition?
Definition
Hydrocortisone Supplementation
Term
What are the Steroidal inhibitors of Aromatase?
Definition
Formestane and Exemestane
Term
What are the Non-steroidal Aromatase Inhibitors?
Definition
Anastrozole
Term
What are the Aromatase inhibitors used to treat?
Definition
ER Positive Breast Cancer
Term
What is the risk of Uterine Cancer and Venous Thromboembolism with Aromatase inhibitors?
Definition
None
Term
What are the negative side effects of Aromatase Inhibitors?
Definition
Vasomotor Instability
Term
What is the MOA of Progestins?
Definition
Decrease GnRH pulse Frequency
Term
What do Progestins do in the body?
Definition
Suppress Uterine Smooth Muscle Contraction, Stabilize Endometrium, Promote Vascularization, and Develop Mammary Glands
Term
What effect do Progestins have on Thermogenesis?
Definition
Increase Temp when Ovulation is occuring
Term
What are the two Progestin Receptors?
Definition
PRA and PRB, distributed in different tissures throughout the body
Term
How do the affinities of Progestin Receptors compare?
Definition
Very Similar
Term
What is the binding site of Progestins?
Definition
Bind Nucleus-Bound Heat Shock Proteins
Term
What happens when Progetins bind Heat Shock Proteins?
Definition
Dimerization, binding to Response elements and coactivators to regulate transcription
Term
Which Progestin receptor type has stimulatory effects?
Definition
PRB found in mammary glands
Term
Which Progestin receptor type is inhibitory?
Definition
PRA Found in Endometrial Tissue
Term
What are the Therapeutic uses of Progestin?
Definition
Oral Contraceptives, Uterine Bleeding, Endometriosis, and Breat/Endometrial Cancer
Term
Is Progesterone orally active?
Definition
No
Term
Why must Progesterone be given IM while suspended in Oil?
Definition
Very Irritating
Term
What are the two preparation types of Progestins?
Definition
Progesterone Derivatives and Testosterone Derivatives
Term
What are the Progesterone Derivatives?
Definition
Medroxyprogesterone and Megestrol Acetate
Term
What are the 19-Nortestosterone Derivatives?
Definition
Norgestrel, Norethindrone, and Ethynodiol
Term
How do 19-Nortestosterone Derivatives differ from Progesterone derivatives?
Definition
They have more Androgenic Activity
Term
What are the Progesterone Derivatives Used for?
Definition
Long acting Injectable Contraceptive
Term
What are the side effects of Progestins?
Definition
Break through Bleeding and Decreased HDL
Term
What is Mifpristone?
Definition
RU 486, competitive inhibitor of Progesterone and Glucocorticoid
Term
Where does RU 486 work?
Definition
Blocks Action of Progesterone on Estrogen Primed Endometrium
Term
How does RU486 work?
Definition
Increases Prostaglandins and Mestraul Bleeding
Term
What drug is used to terminate pregnancy?
Definition
RU 486 with Prostaglandin
Term
What are the side effects of Mifpristone?
Definition
Nausea, Dizziness, and Abdominal Pain
Term
What is endometrium growth outside the uterus typically in the Pertioneal Cavity?
Definition
Endometriosis
Term
What are the possible treatments for Endometriosis?
Definition
Surgery or Leuprolide
Term
What does Leuprolide do in the short term?
Definition
Increases GnRH acts as Agonist
Term
What is the long term effect of Leuprolide?
Definition
Suppresses GnRH and Steroidigenesis
Term
What can be the side effect of Long term Leuprolide use?
Definition
Reduces Estrogen Levels
Term
What is the MOA of Medroxyprogesterone?
Definition
Inhiits Gonadotrophin Secretion but also opposes the Estrogenic Stimulation of Endometriosis
Term
Which drug can be given as a Intruterine Device to combat endometriosis?
Definition
Levonorgestrel
Term
What are the side effects of Levonorgestel is used for longer than 5 years?
Definition
Excessive Uterine Bleeding
Term
What is the effect of Birth Control pills on endometriosis?
Definition
Stabilize Estrogen and Progestin levels
Term
What is the MOA of Danazol against endomertiosis?
Definition
Reduces Estrogen Production by decreaseing FSH/LH
Term
What are the side effects of Danazol?
Definition
Poor Cholesterol, Hirutism, Hotflashes, and Deepening of the Voice
Term
Why are progestins typically given in conjunction with estrogens during Hormone Replacement Therapy?
Definition
To Inhibit Proliferation of Endometrial Tissue
Term
What is the effect of Progestins on the Fallopian Tubes?
Definition
Decrease Contractions of the Fallopian Tubes
Term
What is the effect of Estrogens on the Fallopian Tubes?
Definition
Increase Contractions of the Fallopian Tubes
Term
What Triggers the formation of Hostile Cervical mucus?
Definition
Progestins
Term
What triggers the switch from Proliferative to Secretory phases of the endometrium?
Definition
Progestins
Term
What can inhibit smooth muscle contracton during pregnancy?
Definition
Progestins
Term
Which hormone can stimulte proliferation of Mammary Gland Tissue?
Definition
Both Progesterone and Estrogen
Term
Long exposure to Birth Control is a risk factor for what type of cancer?
Definition
Breast
Term
What is the action of Clomiphene on fertility?
Definition
Induces Fertility by competeing with estrogen at the Hypothalamus and Pituitary
Term
What fertility drug us a partial estrogen receptor agonist?
Definition
Clomiphene
Term
In what percentage of Women will Clomiphene trigger Ovulation?
Definition
90-95% with normal Ovarian Reserve
Term
What are some of the side effects of Clomiphene?
Definition
Multiple Births, Hot Flashes, Ovarian Enlargement, and Blurred Vision
Term
After the intial administration of Clomiphene is pregancy most likely?
Definition
Within a Year
Term
When are Gonadotrophins used to stimulate Ovulation?
Definition
When patient doesnt have a functioning Pituitary Gland
Term
What are Menotropin
Definition
Urofollitropin, and HCG?,Gonadotropins used to stimulate Ovulation
Term
What must be monitored when using Gonadotrophins?
Definition
Estradiol and Follicular Growth to prevent multiple Pregnancies
Term
What is a common cause of infertility?
Definition
Hyperprolactinemia
Term
What is used to treat Hyperprolactinemia?
Definition
Bromocriptine
Term
What is used to boost fertility in men?
Definition
Gonadotropins and Clomiphene, to increase LH
Term
Which estrogen derivatives are used in oral contraceptives?
Definition
Mestronol and Ethinyl Estradiol
Term
What are the Progesterones used in oral contraceptives?
Definition
Norethindrone, Norgestrel, Ethynodiol Diacetate, and Levonorgestrel
Term
Which of the Progesterone Derivtives have lower androgenic activity?
Definition
Norgestrel and Levonorgestrel
Term
What is the advantage of the new Multiphasic Oral Contraceptives?
Definition
Lower Hormone Levels
Term
What is the disadvantage of the Multiphasic Pills?
Definition
If you miss a pill the possibilty of Ovulation is higher
Term
What are the benefits of Borth Control other than not getting Preggers?
Definition
Controls Dysmenorrhea, Decreased Endometrial/Ovarian Cancer, Decrease PID, Fibrocystic Disease, Ovarian Cysts, and Decreased ACne
Term
What are some of the side effects of Birth Control?
Definition
Breast Cancer, Cervical Cancer with HPV, MI, Thrombosis, Headache/Migraine, HDL and LDL Negative, and Glucose Tolerance
Term
What is the effect of older Oral Contraceptives on Clotting Factors and Platelets?
Definition
Increases
Term
What is the effect of older Oral Contraceptives on Prothrombin time?
Definition
Decreases
Term
What happens to Steroid Hormone Binding Globulins when using older forms of Birth Control?
Definition
Increase
Term
What is the effect of older Contraceptives on Ang I and Ang II?
Definition
Increase
Term
What is the effect of older contraceptives on cholesterol?
Definition
Increase
Term
What is the effect of older contraceptives on LH/FSH/Estradiol/Progesterone?
Definition
Decrease
Term
What is the so called 'Mini Pill" for birth control?
Definition
Progestin only formulation
Term
What are the advantages of Progestin only Oral Contraceptives?
Definition
Decreased Bleeding, Decreased Cramps, Ok for Breat Feeding Women, and Can be used by Smokers who have risk factor for CAD
Term
Which oral contraceptive must be taken at the same time each day in order to be effective?
Definition
Progestin Only Formulation
Term
What form of Oral Contraceptives can cause Irregular Heavy Bleeding?
Definition
Progestin Only
Term
What are the Adverse side effects of Progestin only contraceptives?
Definition
Breakthrough Bleeding, Headache, Mood Change, Weight Gain, Increased Acne, Decreased HDL, Increased LDL, Decreased Bone Density
Term
What drugs are contraindicated in women with Thromboembolic Disorders?
Definition
Medroprogesterone and Levonorgestrel
Term
What drugs can interact with p450s to decrease the effectiveness of Oral Contraceptives?
Definition
Tetracycline, Rifampin, Metronidazole, Penicillin, Anti-HIV Drugs, Anti-Epileptic Drugs, and St Johns Wort
Term
What composes the Morning after pill?
Definition
.50 mg of Ethinyl Estradiol and .25 mg of Norgestrel
Term
When must the morning after pill be taken?
Definition
WIthin 72 hours of exposure then again 12 hours later
Term
What is the MOA of the Morning After Pill?
Definition
Stimulates Endometrial Bleeding
Term
What is Plan B?
Definition
Synthetic Progestin .75 mg of Levonorgestrel
Term
What is the MOA of Plan B?
Definition
Not Well Understood, May Inhibit or Delay Ovulation, Fertilizaton, Transport, or Implantation
Term
How effective are the progestin only birth control pills?
Definition
Block 80% of the time but are as effective as Combined at Preventing Pregnancy
Term
What is the basis of Male Antifertility drugs?
Definition
Inhibit LH and Endogenous Testosterone production
Term
What is used to treat precocious puberty?
Definition
GnRH Agonists
Term
What is used to treat Hypogonadism?
Definition
Androgens and Estrogens
Term
If hypogonadism in a short stature boy what should be given with Androgens?
Definition
Aromatase Inhibitors
Term
What is used to treat breast cancer?
Definition
SERMs, SERDs, and Aromatase INhibitors
Term
What is used to treat hyperprolactenimia?
Definition
Bromocriptine
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