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Biomedical subjects

Philip M Sarrel

Publications and source records attributed to Philip M Sarrel.

10 recordsLinked to original sources
PubMed2005

Striatal dopamine transporter availability with [123I]beta-CIT SPECT is unrelated to gender or menstrual cycle.

OBJECTIVES: The effect of gender and female menstrual cycle on human striatal dopamine transporters (DATs) was investigated with single-photon emission computed tomography (SPECT) using the ligand 2beta-carbomethoxy-3beta-(4-[(123)I]iodophenyl)tropane. METHODS: Ten female subjects aged 18-40 years (25.3+/-7.3 years) were scanned twice during the early follicular and the mid-luteal phases to detect any hormone-mediated changes in DAT availability in the striatum or serotonin transporter (SERT) availability in brainstem-diencephalon. Plasma estradiol and progesterone levels were obtained at the time of SPECT and confirmed the expected increases from the follicular to the luteal phases. Finally, in a post hoc analysis of a previously published healthy-subject sample, striatal DAT availability was compared between 70 male and 52 female subjects who ranged in age from 18 to 88 years. RESULTS: In the ten menstrual cycle subjects, DAT availability (V(3)'') in striatum and SERT availability in brainstem-diencephalon did not differ between follicular and luteal phases. Moreover, change in V(3)'' for striatum or brainstem-diencephalon was uncorrelated with change in plasma estradiol or progesterone from the follicular to the luteal phase. In the larger healthy-subject sample, there was no significant effect of gender or the interaction of age and gender on striatal V(3)''. CONCLUSIONS: These findings suggest that in using DAT or SERT ligands in the study of neuropsychiatric disorders, matching of female subjects according to a menstrual cycle phase is unnecessary. Although the present investigation did not confirm previous reports of gender differences in striatal DAT availability, controlling for gender in such studies still seems advisable.

Adolescent↗
PubMed2005

Decline in physical performance among women with a recent transient ischemic attack or ischemic stroke: opportunities for functional preservation a report of the Women's Estrogen Stroke Trial.

BACKGROUND AND PURPOSE: Physical performance for walking, reaching, turning, and other common tasks is a major determinant of functional independence after stroke. Current strategies to preserve physical performance focus on prevention of recurrent stroke. Loss of physical performance, however, may occur in the absence of recurrence. To examine this possibility, we measured change in physical performance, independent of subsequent stroke, among women with a recent ischemic stroke or transient ischemic attack (TIA). METHODS: Among 664 postmenopausal women who participated in a clinical trial of estrogen therapy after stroke or TIA, we administered the Physical Performance Test (PPT) at baseline (mean 58 days from the cerebrovascular event) and annually. Women who died or had a stroke during follow-up were censored. Decline or improvement in physical performance was defined as a change in the PPT score from baseline of at least 3 points. Sustained decline or improvement was defined as 2 consecutive years during which the score had declined or improved, respectively, relative to the baseline score. RESULTS: With each year of follow-up, a smaller proportion of the cohort demonstrated improvement (16% in year 1, 6% in year 5) and a larger proportion demonstrated decline (15% in year 1, 35% in year 5). In an analysis restricted to 259 women with 3 years of follow-up, 46 (18%) experienced a nonsustained decline in physical performance, and 39 (15%) experienced a sustained decline. CONCLUSIONS: Decline in physical performance is common after an ischemic stroke or TIA even in the absence of a recurrent neurological event. Our findings suggest that specific interventions to maintain and improve physical performance may be important for reducing long-term disability.

Aged↗
PubMed2005

Estrogen therapy and risk of cognitive decline: results from the Women's Estrogen for Stroke Trial (WEST).

OBJECTIVE: This study was undertaken to assess whether estrogen therapy (ET) reduces the risk of cognitive decline in women with cerebrovascular disease. STUDY DESIGN: We conducted a randomized, double-blind trial of estradiol 17beta versus placebo for secondary stroke prevention in 664 postmenopausal women with a recent stroke or transient ischemic attack. The Mini-Mental State Examination (MMSE) and 5 domain measures were obtained at baseline and exit. RESULTS: Among 461 women withdrawn alive without stroke, ET did not have a significant effect on cognitive measures after an average of 3 years (relative risk of MMSE decline: 0.74, 95% CI, 0.49-1.13). In women with normal MMSE at entry, estrogen was associated with less decline (relative risk, 0.46, 95% CI, 0.24-0.87). CONCLUSION: In this study, estradiol did not have significant effects on cognitive measures. However, in women with normal function at baseline, there may be a benefit for ET in reducing the risk for cognitive decline.

Aged↗
PubMed2005

Sexual dysfunction: treat or refer.

Sexual dysfunction is common in postmenopausal women, but because this problem may be caused by several factors, the primary need for these patients is an initial assessment and accurate diagnosis by the primary care provider. Listening to the patient and clarifying her concerns are important for defining the nature of the problem, its severity and duration, and her motivation for treatment. A complete physical evaluation, including a pelvic examination and measurement of postmenopausal hormone levels, may provide important information for structuring a treatment plan to address the patient's concerns. Providing postmenopausal women with reassuring reading materials and focusing on their specific concerns about sexual dysfunction will help reduce anxiety, as will physician suggestions keyed to the patient's individual needs. Alleviation of some menopause-related sexual function difficulties with prescription medications may be warranted, and referral to a specialist for further treatment and counseling may often be the best course of action for a primary care provider. Sexual problems in postmenopausal women are usually amenable to fairly simple interventions that are within the competence of primary care professionals. This paper provides the primary care provider with a perspective on the appropriateness of treatment compared with referral for women experiencing postmenopausal sexual dysfunction.

Aged↗
PubMed2004

Oats, antioxidants and endothelial function in overweight, dyslipidemic adults.

OBJECTIVE: To determine effects of oat and antioxidant vitamin (C 500 mg, E 400 IU) ingestion on endothelial function in overweight, dyslipidemic adults. DESIGN: Randomized, blinded, placebo-controlled, crossover trial Intervention(s): Subjects (16 males > or = age 35; 14 postmenopausal females) were assigned, in random order, to oats (60 g oatmeal), vitamin E (400 IU) plus vitamin C (500 mg), the combination of oats and vitamins, or placebo, and underwent brachial artery reactivity scans (BARS) following a single dose of each treatment, and again following 6 weeks of daily ingestion, with 2-week washout periods. At each test, a provocation high-fat meal (50 g, predominantly saturated) was administered and subjects were scanned pre, and 3 hours post-ingestion. RESULTS: Mean flow-mediated vasodilation (FMD; measured as percent diameter change before and after treatments) at baseline was 6.35 +/- 3.37. Oats increased FMD non-significantly (p > 0.05) with both single acute dose (from 6.07 +/- 6.25 to 9.22 +/- 8.82) and six weeks of sustained treatment (from 6.01 +/- 10.07 to 8.69 +/- 8.42). The direction of effect was negative for vitamins and the oat/vitamin combination with both acute and sustained treatment. There were no significant differences in FMD change among the treatments in either phase of the study, however when acute and sustained effects were pooled, oat treatment significantly augmented FMD (p < 0.05). CONCLUSIONS: This trial suggests but does not confirm a beneficial influence of oat ingestion on endothelial function in overweight, dyslipidemic adults. Further study of this potential association is warranted.

Adult↗
PubMed2003

Raloxifene and endothelial function in healthy postmenopausal women.

OBJECTIVE: The purpose of this study was to determine the effects of raloxifene on endothelial function in healthy, postmenopausal women. STUDY DESIGN: This was a randomized, double-blind, placebo-controlled crossover trial. Subjects (n = 19; mean age, 61 years) underwent endothelial function testing at baseline and after treatment with placebo or raloxifene (60 mg per day for 6 weeks). RESULTS: Brachial artery diameter change (flow-mediated dilation) increased 5.0% with placebo and 8.56% with raloxifene (SE = 1.83, P =.03) in response to a hyperemic stimulus; an adjustment of this response for a variation in stimulus intensity resulted in greater discrimination (P =.009). The ratio of area under the curve response to area under the curve reference with the use of laser Doppler measures was 1.18 for placebo and 1.28 for raloxifene (P =.05). Flow-mediated dilation and area under the curve ratio correlated significantly (r = 0.33, P =.04). CONCLUSION: Treatment with raloxifene enhanced endothelial-mediated dilation in brachial arteries and digital vessels in healthy, postmenopausal women. A potential mechanism for a cardioprotective effect of raloxifene is suggested and warrants further study.

Brachial Artery↗
PubMed2002

Clinical assessment of function among women with a recent cerebrovascular event: a self-reported versus performance-based measure.

BACKGROUND: Self-reported functional status is a commonly used health measure in clinical settings, yet the optimal approach for assessing function is often debated. OBJECTIVE: To examine the agreement between a self-reported and a performance-based measure of function and the relative ability of each measure to predict long-term health outcomes. DESIGN: Prospective cohort study. SETTING: 20 hospitals in Connecticut and Massachusetts. PARTICIPANTS: 620 postmenopausal women (46 to 91 years of age) who had experienced a stroke or transient ischemic attack. MEASUREMENTS: A self-reported and a performance-based measure of function were assessed at baseline (before intervention) by using the Barthel index and the Physical Performance Test. RESULTS: Disagreement between the self-reported and performance-based measure of function was common (slight disagreement, 55.0%; substantial disagreement, 19.3%). Most women (95.4%) overreported their level of function. Women who were more clinically impaired (risk ratio [RR] for more comorbid conditions, 1.52 [95% CI, 1.17 to 1.97]; RR for recent stroke, 2.33 [CI, 1.45 to 3.73]; and RR for cognitive impairment, 1.76 [CI, 1.34 to 2.32]); who were less educated (RR = 1.30 [CI, 1.02 to 1.67]); and who were of nonwhite ethnicity (RR 1.43 [CI, 1.07 to 1.91]) were more likely to overreport their level of function. An impaired performance-based measure of function predicted subsequent stroke or death (hazard ratio, 1.50, [CI, 1.06 to 2.11]); however, an impaired self-reported measure of function was not likely to predict these outcomes. CONCLUSIONS: Clinicians should be aware that results of self-reported and performance-based measures of function can differ in women who have experienced a recent cerebrovascular event. Although more difficult to collect, results of a performance-based measure may provide information about long-term health outcomes that is not available from a self-reported measure.

Activities of Daily Living↗
PubMed2002

Androgen deficiency: menopause and estrogen-related factors.

OBJECTIVE: To describe the changes in ovarian hormones caused by natural menopause and hormone replacement therapy that have effects on androgen bioavailability and to describe indications for androgen replacement in postmenopausal women. DESIGN: Review of English language-published research over the last 35 years from January 1, 1966 to June 30, 2001 using MEDLINE. SETTING: Academic medical center. INTERVENTION(S): None. RESULT(S): In menopausal women, the effects of estradiol depletion and replacement on sex hormone-binding globulin appear to have clinically significant effects on bioavailable endogenous androgens. Many women whose menopause-related symptoms and bone loss responded inadequately to estrogen replacement were found to benefit from the addition of androgens. Most studies have focused on the sexual benefits of prescribing androgens to postmenopausal women. New studies have begun exploring the effects of androgens in other body systems, including the brain and the cardiovascular system. CONCLUSION(S): Estrogen depletion and replacement therapy at menopause can have clinically significant effects on bioavailability of endogenous androgens. Androgens complement the actions of estrogens in symptom control and disease prevention in postmenopausal women. Although androgen effects on sexual function are important, effects of androgens in many body systems should be considered in future research to determine optimal postmenopausal hormone replacement therapy.

Androgens↗
PubMedDate not supplied

Vaginal laser Doppler flowmetry pre- and posthysterectomy.

The objective of this study was to demonstrate the applicability of laser doppler flowmetry to pre- and posthysterectomy vaginal blood flow assessment. We used laser Doppler flowmetry to measure pre-and postoperational vaginal blood flow in 8 premenopausal women undergoing benign hysterectomies; we also measured serum E2, FSH, FT and administered a brief sexual function questionnaire. We analyzed data using two tailed t-test for paired samples. We found no significant differences at the P <.05 level of significance for vaginal blood flow. Accompanying values of estradiol, FSH, and free testosterone remained unchanged as well. A brief sexual function assessment revealed improvement or stability of libido, arousal, orgasm, and partner relatedness. Laser doppler flowmetry is an objective, reproducible measure of vaginal blood flow and may be used to investigate posthysterectomy sexual function.

Adult↗