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Biomedical subjects

J G Wilcox

Publications and source records attributed to J G Wilcox.

9 recordsLinked to original sources
PubMed1997

The significance of polycystic-appearing ovaries versus normal-appearing ovaries in patients with polycystic ovary syndrome.

OBJECTIVE: To evaluate what hormonal or biochemical parameters are most highly associated with the finding of polycystic-appearing ovaries as compared with normal-appearing ovaries in women with polycystic ovary syndrome (PCOS). DESIGN: Prospective randomized study. SETTING: Academic medical center. PATIENTS: Ten women with PCOS-five with normal-appearing ovaries and five with polycystic-appearing ovaries-were matched for age and body mass index. All had serum T levels between 80 and 150 ng/dL (conversion factor to SI unit, 3.467). INTERVENTION(S): Insulin infusion for the purpose of performing insulin tolerance testing to evaluate insulin resistance or sensitivity. MAIN OUTCOME MEASURE(S): We measured serum T, DHEAS, androstenedione, sex-hormone binding globulin, 5 alpha-androstane-3 alpha-17 beta-androstenediol glucuronide, FSH, LH, insulin-like growth factor-I, insulin-like growth factor binding protein-1, and insulin-like growth factor binding protein-3. Insulin resistance, measured by insulin tolerance testing, also was done on the same day after the patient had fasted for at least 8 hours. RESULT(S): Serum androgens and binding proteins were not significantly different in both groups. Insulin tolerance testing demonstrated a slower glucose disappearance in the polycystic appearing ovary group (Kitt glucose was 4.58% +/- 1.4%/min in the normal-appearing ovaries group versus 2.07% +/- 1.07%/min in the polycystic-appearing ovaries group). CONCLUSION(S): Women with PCOS and polycystic-appearing ovaries do not demonstrate any definitive serum hormonal differences compared with women with PCOS and normal-appearing ovaries. The presence of polycystic-appearing ovaries correlates significantly with the presence of insulin resistance.

Adult↗
PubMed1997

Cardioprotective effects of individual conjugated equine estrogens through their possible modulation of insulin resistance and oxidation of low-density lipoprotein.

OBJECTIVE: To examine the independent effects on insulin sensitivity and antioxidative activity of the three most prevalent constituents in Premarin (Wyeth-Ayerst Laboratories, Philadelphia, PA): estrone sulfate (E1S), 50%; equilin sulfate (EqS), 25%, and 17 alpha-dihydroequilin sulfate (17 alpha-ES), 15%. DESIGN: Prospective randomized cross-over study. SETTING: University of Southern California Medical Center. PATIENT(S): Eight healthy postmenopausal women, mean age 53 +/- 2 years, and mean body mass index, 26 +/- 2 kg/m2, were enrolled. INTERVENTION(S): Each woman received, in randomized succession, daily oral doses of 17 alpha-ES (0.2 mg), E1S (0.625 mg), and EqS (0.3 mg) for 30 days. MAIN OUTCOME MEASURE(S): Oxidation of low-density lipoprotein (LDL) by negatively charged LDL (LDL-) and lag phase duration and measured the plasma glucose disappearance after insulin administration (K(itt)). RESULT(S): All three estrogen preparations demonstrated antioxidant effects with E1S demonstrating the most significant changes, followed by EqS and 17 alpha-ES. Using E1S, LDL-levels decreased from a baseline of 3.91 +/- 0.9 to 2.05 +/- 0.32 mg/dL and the lag time increased from 24.5 +/- 6.0 to 87.8 +/- 11.8 minutes. Changes in insulin tolerance tests revealed improved insulin action with the various estrogens. With EqS, K(itt) increased from 3.1% +/- 0.3% to 4.3% +/- 0.3% glucose/min, was intermediate with E1S and was least with 17 alpha-ES. CONCLUSION(S): All three conjugated equine estrogens demonstrated antioxidant activity. Also, some improved insulin action was demonstrated. To our knowledge, this is the first in vivo study to examine the effects of these components which may help explain, in part, some of the cardioprotective properties ascribed to Premarin.

Adult↗
PubMed1997

Endothelin levels decrease after oral and nonoral estrogen in postmenopausal women with increased cardiovascular risk factors.

OBJECTIVE: To establish levels of plasma endothelin-1 in postmenopausal women with increased CV risk as compared with healthy premenopausal women and to measure the effects of different forms of estrogen replacement on plasma endothelin-1. DESIGN: Prospective randomized study. SETTING: University of Southern California Medical Center. PATIENT(S): We studied 18 postmenopausal women (mean age 53.4 +/- 4.9 years) with total cholesterol levels > 240 mg/dL divided into those with and without hypertension as well as in 10 healthy premenopausal women. INTERVENTION(S): The postmenopausal women were randomized to receive oral estrone sulfate, transdermal E2, or placebo for 30 days. MAIN OUTCOME MEASURE(S): We measured the endothelin-1 levels and total cholesterol at baseline and after 30 days of estrogen treatment. RESULT(S): In the postmenopausal women, endothelin-1 was higher (4.58 +/- 0.46 pg/mL) compared with premenopausal levels (2.80 +/- 0.46 pg/mL). In hypertensive postmenopausal women, endothelin-1 was 5.56 +/- 0.44 pg/mL. After estrogen, plasma endothelin-1 values decreased from 5.38 +/- 0.66 to 4.82 +/- 0.9 pg/mL with oral estrone sulfate, 4.84 +/- 0.25 to 4.54 +/- 0.49 pg/mL with transdermal E2, and did not change after placebo 4.76 +/- 0.71 to 4.81 +/- 0.46 pg/mL. In evaluating hypertensive women alone with estrogen therapy, plasma endothelin-1 showed the greatest decrement from 5.39 +/- 0.49 to 4.4 +/- 0.59 pg/mL (18.4%). The decrease in endothelin-1 with estrogen, which was statistically significant for the entire group, did appear to be influenced by the route of administration. Baseline plasma endothelin-1 levels were correlated positively to plasma cholesterol levels with a correlation coefficient of 0.632. CONCLUSION(S): These data provide another potential mechanism explaining the cardioprotective effects of hormone replacement therapy.

Administration, Cutaneous↗
PubMed1996

Biologic effects of 17 alpha-dihydroequilin sulfate.

OBJECTIVE: To determine the independent biologic effects of 17 alpha-dihydroequilin sulfate. DESIGN: Prospective randomized study. SETTING: University of Southern California Medical Center. PATIENTS(S): Twenty-one postmenopausal women, mean age 50 +/- 2 (+/-SEM) years, and mean body mass index 27 +/- 2. INTERVENTION(S): Women were randomized to receive daily oral doses of either 1.25 mg of estrone sulfate (E1S), 0.2 mg of 17 alpha-dihydroequilin sulfate, or a combination. Three blood and urine samples were obtained before and after 30 and 90 days of treatment. RESULT(S): After 30 and 90 days of treatment, E1S alone increased sex hormone-binding globulin (SHBG) levels significantly, 19.7% +/- 6.0% and 61.3% +/- 13.0%, whereas 17 alpha-dihydroequilin sulfate reduced SHBG levels, 20.8% +/- 68% and 12.4% +/- 7.5%, respectively. Nevertheless, the combination of E1S and 17 alpha-dihydroequilin sulfate significantly increased SHBG levels, 103% +/- 27.9% and 98.2% +/- 19.1%, compared with baseline at 30 and 90 days. Fewer changes were evident with corticosteroid-binding globulin (CBG). After 90 days of treatment, CBG levels significantly increased 30.9% +/- 5.5% with E1S, decreased by 7.2% +/- 5.0% with 17 alpha-dihydroequilin sulfate, and, with the combination, significantly increased by 10.5% +/- 2.4% compared with baseline. Changes in lipids and lipoproteins were more variable. However, high-density-lipoprotein cholesterol increased significantly with E1S at 30 and 90 days compared with baseline, 96.5% +/- 39% and 91.5% +/- 22.6%, and with the combination increased 66.4% +/- 13.3% and 79.2% +/- 24.4%, respectively. Fewer changes were evident with 17 alpha-dihydroequilin sulfate alone, decreasing 4.4% +/- 22% and 2.6% +/- 21.3%. Urinary ratios of bone collagen equivalents-creatinine and calcium-creatinine decreased in all three groups. However, the combination group resulted in a significantly greater percentage decrease in bone collagen equivalents-creatinine than with E1S alone. CONCLUSIONS(S): 17 alpha-Dihydroequilin sulfate could modify some of the first-pass effects of conjugated equine estrogens and act synergistically with other conjugated equine estrogens to reduce bone resorption.

Calcium↗
PubMed1994

Acyclovir for disseminated herpes simplex virus in pregnancy. A case report.

Seventeen cases of disseminated herpes simplex virus (HSV) infection have occurred during pregnancy. Acyclovir therapy was associated with prolongation of the time from admission until spontaneous rupture of the membranes or delivery and an improved maternal outcome. This life-threatening condition has a typical presentation, which includes a nonspecific viral prodrome. During pregnancy, fever and anicteric hepatitis unresponsive to empiric antibiotics should prompt an evaluation for disseminated herpes simplex. Pharyngitis or skin lesions with a positive herpes simplex culture are common, specific signs associated with dissemination. The fever resolves within 48 hours in response to acyclovir therapy. One case of maternal disseminated HSV occurred at 22 weeks' gestation and resolved with acyclovir therapy; a healthy neonate was delivered vaginally at term.

Acyclovir↗
PubMed1991

Group B streptococcus: the effectiveness of screening and chemoprophylaxis.

Although antepartum screening for Group B Streptococcus is not ideal, it may be the most practical approach until rapid tests are proven to be useful in this clinical setting. The efficacy has been established for intrapartum chemoprophylaxis with a penicillin antibiotic of patients with a positive antepartum culture. There is evidence that supports the concept for selective intrapartum chemoprophylaxis in some populations. Intrapartum chemoprophylaxis prevents maternal morbidity. Rapid tests for intrapartum diagnosis of Group B streptococcus colonization appear promising, providing results are available in time for therapy to be administered before delivery.

Ampicillin↗
PubMed1991

Comparison of culture for group B streptococcus versus enzyme immunoassay and latex agglutination rapid tests: results in 250 patients during labor.

Two hundred fifty women in labor were screened for vaginal colonization by group B streptococcus using standard culture and two rapid tests. This primarily Hispanic population had a group B streptococcus vaginal colonization rate of 2.4% (95% confidence interval 0.9-5.2%) for the patients sampled. An enzyme immunoassay and a latex agglutination test for group B streptococcus antigen both had sensitivities of 33% and had specificities of 99 and 95%, respectively, when compared with culture. Neither rapid test appeared to be clinically useful for detecting colonized women in labor, although both can be useful in excluding colonization.

Antigens, Bacterial↗