Paola Villa

The differential effect of the phytoestrogen genistein on cardiovascular risk factors in postmenopausal women: relationship with the metabolic status.

CONTEXT The wide family of the phytoestrogens has become an alternative to the classical hormonal therapy in menopause; nevertheless, some findings are still conflicting. OBJECTIVE To examine the effect of genistein administration on metabolic parameters and vascular reactivity considering the basal endocrine status of the patients. DESIGN AND SETTING A randomized placebo controlled study was conducted at a university hospital. PARTICIPANTS Fifty postmenopausal women participated. INTERVENTIONS Thirty subjects (group A) were randomized to receive 54 mg/d genistein while 20 subjects (group B) were treated with the placebo for 24 wk. In group A, we distinguish two subgroups: 14 normoinsulinemic and 12 hyperinsulinemic patients. MAIN OUTCOME MEASURES Anthropometric measures, hormonal and lipid assays, oral glucose tolerance test with glycemic, insulin, and C-peptide evaluation, indexes of insulin sensitivity and endothelial function, and euglycemic-hyperinsulinemic clamps were performed. RESULTS The insulin basal values significantly decreased in group A, whereas the homeostasis model index of insulin sensitivity and the fasting glucose levels significantly improved compared with placebo group. The genistein administration decreased fasting glucose and area under the curve glucose levels in the normoinsulinemic patients after treatment. In the hyperinsulinemic patients, a significant reduction in fasting insulin, fasting C-peptide, and area under the curve insulin levels as well as an increase in fractional hepatic insulin extraction was shown. In these patients, high-density lipoprotein cholesterol levels were significantly improved. The endothelium-dependent and -independent dilatation improved in the treated group. Normoinsulinemic patients showed both a significantly enhanced flow-mediated and nitrate-mediated dilatation, whereas no significant changes were found in the hyperinsulinemic group. CONCLUSIONS The glycoinsulinemic metabolism and the endothelial function were significantly influenced by genistein. In particular, normoinsulinemic patients showed an improvement in glycemic and vascular reactivity indexes. Conversely, an improvement in the insulin sensitivity indexes was noted in hyperinsulinemic patients.

Gonadotropin-releasing hormone agonist versus human chorionic gonadotropin as a trigger of ovulation in polycystic ovarian disease gonadotropin hyperstimulated cycles

OBJECTIVE To compare the use of GnRH agonist (GnRH-a) versus hCG in triggering the follicular rupture in patients with polycystic ovarian disease (PCOD) in whom ovulation was induced by gonadotropins. DESIGN Polycystic ovarian disease gonadotropin hyperstimulated cycles outcome was investigated in a prospective study. PATIENTS AND INTERVENTIONS Thirty-three PCOD patients (40 cycles) with gonadotropin-induced mild to moderate degree of ovarian hyperstimulation received 5,000 IU IM hCG or 200 microg [corrected] SC GnRH-a. A subgroup of GnRH-a-treated patients received P for luteal support. Five GnRH-a-treated patients underwent a GnRH test during luteal phase. MAIN OUTCOME MEASURES Echographic and endocrine characteristics both during the therapy and the luteal phase. RESULTS There was a similar percentage of ovulation and pregnancy rate in both groups of patients. The ovarian enlargement during the luteal phase in the GnRH-a-treated patients was lower than in the hCG group. Progesterone plasma levels (at midluteal phase) and the length of luteal phase was significantly lower in GnRH-a-treated patients with respect to the hCG-treated group. These differences disappeared in patients receiving luteal support. After GnRH injection, LH secretion decreased in GnRH-a-treated patients with respect to controls; however, corpus luteum was able to respond with a normal increase of P production. CONCLUSION The GnRH-a appears to be an effective alternative to hCG for inducing the follicular rupture in stimulated cycles in women who are at risk for developing ovarian hyperstimulation syndrome. However, GnRH-a administration can induce short luteal phase. This defect may be ascribed to the pituitary desensitization rather than to a direct effect on corpus luteum. Luteal phase support is needed to prevent luteal phase deficiency.

Vaginal atrophy of women in postmenopause. Results from a multicentric observational study: The AGATA study.

OBJECTIVES Prevalence of vulvar-vaginal atrophy (VVA) has been always investigated by phone or web interview without any objective evaluation. Objective signs associated with symptoms of VVA are now termed genitourinary syndrome of menopause (GSM). This multi-centric study was performed in order to provide nation-wide data on the prevalence and management of GSM. METHODS Nine hundred thirteen females, 59.3 ± 7.4 years old asking for a routine gynecological examination were recruited. Diagnosis of GSM was based on patient sensation of vaginal dryness, any objective sign of VVA and a pH > 5. RESULTS A 722/913 (79.1%) women were diagnosed with GSM with a prevalence ranging from 64.7% to 84.2%, starting from 1 to 6 years after menopause. Sedentary women were at higher risk of GSM (OR 1.8, 95% CI: 1.3-2.5; p = 0.0005). Recent vaginal infection was more likely in women with GSM (OR 2.48, 95% CI: 1.33-4.62; p = 0.0041). Symptoms reported by women with GSM were vaginal dryness (100%), dyspareunia (77.6%), burning (56.9%), itching (56.6%) and dysuria (36.1%). Signs detected by gynecologists were mucosal dryness (99%), thinning of vaginal rugae (92.1%), pallor of the mucosa (90.7%), mucosal fragility (71.9%) and petechiae (46.7%). Only 274 (30%) of women had had a previous diagnosis of VVA/GSM. These were treated either with no therapy (9.8%), systemic hormone (9.2%), local hormone (44.5%) or local non-hormonal (36.5%) therapy. At the time of our investigation 266 of them (97.1%) still had the disorder. CONCLUSIONS GSM is a common, under-diagnosed and under-treated disorder. Measures to improve its early detection and its appropriate management are needed.

Effect of opioid blockade on insulin and growth hormone (GH) secretion in patients with polycystic ovary syndrome: the heterogeneity of impaired GH secretion is related to both obesity and hyperinsulinism

OBJECTIVE To investigate the involvement of opioid tone, obesity, and hyperinsulinemia in GH secretion in women with polycystic ovary syndrome (PCOS). DESIGN Controlled clinical study. SETTING Catholic University of Sacred Heart School of Medicine in Rome, Italy. PATIENT(S) Twenty-two patients with PCOS and 14 healthy, normally ovulating volunteers, matched for age and body mass index. INTERVENTION(S) Patients underwent a GH-releasing hormone (GHRH) test and an oral glucose tolerance test before and after 4-5 weeks of treatment with 50 mg/d of naltrexone. MAIN OUTCOME MEASURE(S) Serum concentrations of GH, insulin, glucose, steroids, and gonadotropins, as well as the GH area under the curve (AUC-GH) and the insulin area under the curve (AUC-I), were measured before and after naltrexone treatment. RESULT(S) In patients with PCOS, the administration of naltrexone increased the GH response to the GHRH test without interfering with the insulin response to the oral glucose tolerance test. However, the GH response to the GHRH test was improved significantly only in lean patients with PCOS, whereas obese patients with PCOS did not show any improvement in GH secretion. In obese control subjects, the treatment reduced plasma basal insulin concentrations and increased the AUC-GH, whereas in lean control subjects, the treatment reduced the GHRH-induced response. In normoinsulinemic patients with PCOS, the GH response to the GHRH test increased significantly after treatment, whereas the AUC-I was not affected. In hyperinsulinemic patients with PCOS, treatment with naltrexone significantly reduced the AUC-I, whereas the AUC-GH increased only in lean hyperinsulinemic patients with PCOS. CONCLUSION(S) Naltrexone treatment improves GHRH-induced GH secretion in patients with PCOS. However, this GH response is heterogeneously represented in relation to both obesity and hyperinsulinism.

Ovarian volume and gluco-insulinaemic markers in the diagnosis of PCOS during adolescence

To evaluate the role of mean ovarian volume (MOV) in the diagnosis of polycystic ovary syndrome (PCOS) during adolescence, and its relationship with metabolic and endocrine parameters.

Low- and standard-estrogen dosage in oral therapy: dose-dependent effects on insulin and lipid metabolism in healthy postmenopausal women

Objective To evaluate the influences of different doses of daily oral unopposed 17β-estradiol compared with placebo, both on glucose tolerance and lipid metabolism in healthy postmenopausal women. Patients and methods Forty-eight normoinsulinemic postmenopausal women were enrolled in the study. Patients were assigned to receive randomly 1 mg (group A) or 2 mg (group B) of oral micronized estradiol therapy daily or to the placebo (group C), for 12 weeks. Results The low-dose estradiol treatment determined an improvement of the peripheral insulin sensitivity, made evident by a significant increase both in the metabolic index and oral glucose insulin sensitivity index (p < 0.01 and p < 0.05, respectively) as well as a decrease in the homeostasis model assessment-estimated insulin resistance (p < 0.01). Conversely, in the standard-dose group, the metabolic index significantly decreased (p < 0.05), showing a slight deterioration in insulin sensitivity. For lipid metabolism, the 1 mg dose showed a neutral effect, while 2 mg had a beneficial effect on low density lipoprotein cholesterol, but caused an increase in triglycerides (p < 0.01 and p < 0.05, respectively). Conclusions The oral low dose of unopposed estradiol therapy had a favorable effect on glycoinsulinemic metabolism in healthy postmenopausal women; however, the standard dose caused a slight but significant deterioration in insulin sensitivity.

Individual effect of E2 and dydrogesterone on insulin sensitivity in post-menopausal women

The aim of this study was to evaluate the impact of a three-month continuous administration of oral E2, alone, or combined with 2 different dosages of dydrogesterone, on the glucose tolerance and insulin sensitivity in postmenopausal women. In a prospective placebocontrolled study, 43 normal weight and normoinsulinemic women were randomized to receive either 2 mg of oral 17β?E2 daily (group A), or 2 mg E2 daily plus 5 mg daily oral dydrogesterone, from day 14 to 28, in a sequentially combined regimen (group B), or 2 mg of E2 and 10 mg dydrogesterone in the same sequentially combined regimen (group C) or placebo for 12 weeks. An OGTT and a euglycemic hyperinsulinemic clamp were performed before and after treatment. Serum glucose and insulin concentrations were measured both in fasting conditions and after OGTT. C-peptide pancreatic secretion was tested only in fasting conditions. Total body glucose utilization (M), for insulin sensitivity evaluation, was determined in each subject. Postmenopausal women treated with unopposed 17β E2 (group A) showed a slight but statistically significant decrease of insulin sensitivity (p<0.05). A more marked deterioration of the same parameter was observed in the 2 groups treated with E2 plus dydrogesterone (group B and group C: p<0.01). Post hoc testing for the percent change from baseline indicated that group A significantly differed from group C (p<0.05) and all treated groups significantly differed from the placebo group (p<0.01). Finally, after treatment in group C, a significant reduction of insulin and an increase of glucose responses to OGTT (p<0.01) were observed. These results indicate that, in a short-term period, the use of 17β?E2 and overall 17β?E2 plus dydrogesterone, even with the reduction of insulin plasma levels, might cause a decrease in insulin sensitivity in normal weight and normoinsulinemic post-menopausal women.

Low-dose estrogen and drospirenone combination: effects on glycoinsulinemic metabolism and other cardiovascular risk factors in healthy postmenopausal women.

OBJECTIVE To evaluate the effects of a daily E2 (1 mg) plus drospirenone oral formulation (2 mg) on glycoinsulinemic metabolism, lipid profile, and endothelial function in symptomatic healthy menopausal women. DESIGN Randomized, double-blind study. SETTING Operative Division of Endocrinological Gynecology, Catholic University of the Sacred Heart, Rome, Italy. PATIENT(S) Forty postmenopausal women. INTERVENTION(S) Patients were randomly submitted to receive treatment with an oral dose of E2 (1 mg) plus drospirenone (2 mg) (group A) or placebo (group B). MAIN OUTCOME MEASURE(S) Hormonal and lipid assessment; evaluation of glucose and insulin metabolism by the clamp test and the oral glucose tolerance test; evaluation of endothelial function by the vascular reactivity test. RESULT(S) Total cholesterol levels, low-density lipoprotein cholesterol levels, and nonesterified fatty acids levels significantly decreased both after 3 and 6 months. No changes in high-density lipoprotein, triglycerides, apolipoprotein A1, apolipoprotein B, and lipoprotein (a) were found. Treatment resulted in few changes in glycoinsulinemic metabolism. We observed a significant reduction of the area under curve of insulin after 6 months of therapy. Endothelial function was significantly influenced by treatment, and an improvement in both flow-mediated dilatation and nitrate-mediated dilatation values after 6 months was observed. CONCLUSION(S) Low-dose E2/drospirenone treatment did not reveal any negative effect on carbohydrate metabolism, acting in a neutral way on insulin sensitivity. The treatment induced favorable changes in lipid profile and showed a significant improvement of vascular reactivity.

Insulin and GH secretion in adolescent girls with irregular cycles: Polycystic vs multifollicular ovaries

In the present study insulin (I) and GH secretion was studied in a group of twenty-five young adolescent girls (mean age: 15±0.23 yr) with cycle irregularity associated to clinical signs of hyperandrogenism in comparison with that observed in eleven normal matched subjects with regular menses. All patients underwent basal hormone measurements and, on two consecutive days, an oral glucose tolerance test (OGTT) and a GHRH iv test. Therefore, all subjects had a transabdominal US scan for the measurement of ovarian volume and the characterization of ovarian morphology. On the basis of the US examination we found patients with poly-cystic ovaries (PCO-like group) and subjects with multifollicular ovaries (MFO group). PCO-like group exhibited T (p<0.01) and LH (p<0.05) plasma levels higher than control group and the highest free androgen index (FAI) values (13±0.87). All patients with irregular menses showed plasma concentrations of AUC for I (AUC-I) significantly higher in respect to control group (7359.4±709 vs 5447±431 μIU/ml × 180min, p<0.01) as well as both PCO-like group and MFO group did (p<0.001 and p<0.01) respectively. MFO group showed higher values of the AUC for GH (AUC-GH) (2809±432 ng/ml × 120min) in respect to controls (1708±208 ng/ml × 120min, p<0.05) and PCO-like subjects (p<0.001), who on the contrary showed the lowest AUC-GH values (618±119 ng/ml × 120min). In conclusion, PCO-like patients associated hyperinsulinemia with a blunted GH secretion while MFO patients had higher GH secretion associated with higher AUC-I values in a way suggesting an immature and still developing reproductive system.

Fasting and post-methionine homocysteine levels in Alzheimers disease and vascular dementia

The aim of the study is to compare the basal homocysteine levels in patients with impairment of cognitive status, and in controls, to evaluate if the methionine loading test is able to identify any differences between patients with Alzheimers disease and patients with vascular dementia. We enrolled 56 subjects, 20 with Alzheimers disease, 18 with vascular dementia, and 18 normal controls. The data shown that plasma homocysteine levels both basal and post-methionine load were significantly higher in the two groups of demented patients than in the control group. No significant differences were found between Alzheimers patients and vascular dementia patients. The homocysteine percent increase after a methionine loading test was significantly higher in the controls with respect to the two groups of demented patients. Only in Alzheimers patients were vitamin B(12) basal levels negatively correlated with basal homocysteine levels (p<0.05), while positively correlated with the homocysteine percent increase after load (p<0.05). The study confirms the possible role of chronically elevated homocysteinemia in neuronal degeneration in demented patients. Even if the methionine loading test revealed an abnormal homocysteine metabolism in demented patients, it didnt show any difference among patients with Alzheimers disease and vascular dementia.