scholarly journals Irisin as a Novel Marker for Insulin Resistance in Iraqi Women with Polycystic Ovary Syndrome Before and After Metformin Therapy

2018 ◽  
Vol 69 (S2) ◽  
pp. 194-200 ◽  
Author(s):  
Fatin Shallal Farhan ◽  
Shatha Sami Hussien
Keyword(s):  
Insulin Resistance ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Ovary Syndrome ◽  
Metformin Therapy ◽  
Before And After ◽  
Iraqi Women

scholarly journals The treatment of insulin resistance does not improve adrenal cytochrome P450c17alpha enzyme dysregulation in polycystic ovary syndrome

1999 ◽  
pp. 56-61 ◽  
Author(s):  
K Unluhizarci ◽  
F Kelestimur ◽  
Y Sahin ◽  
F Bayram
Keyword(s):  
Insulin Resistance ◽  
Insulin Sensitivity ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Tolerance Test ◽  
Glucose Disposal ◽  
Ovary Syndrome ◽  
Metformin Therapy ◽  
Insulin Levels ◽  
Healthy Women

OBJECTIVE: To determine whether metformin. when given to non-diabetic women with polycystic ovary syndrome (PCOS), results in a reduction of insulin resistance and hyperinsulinemia while body weight is maintained. Also we aimed to see whether the reduction in insulin levels attenuates the activity of adrenal P450c17alpha enzyme in patients with PCOS. DESIGN: We investigated the 17-hydroxyprogesterone (17-OHP) and androstenedione responses to ACTH, insulin responses to an oral glucose tolerance test (OGTT) and glucose disposal rate in an insulin tolerance test before and after metformin therapy (500 mg, orally, twice daily, for 12 weeks). METHODS: The presence of hyperinsulinemia in 15 women with PCOS was demonstrated by an OGTT and results were compared with those of 10 healthy women. Insulin sensitivity was measured by the rate of endogenous glucose disposal after i.v. bolus injection of insulin. 17-OHP and androstenedione responses to ACTH were measured in all the women with PCOS and the normal women. RESULTS: Women with PCOS were hyperinsulinemic (102.0+/-13.0 (S.E.M.) VS 46.2+/-4.4 pmol/l) and hyperandrogenemic (free testosterone 15.3+/-1.7 vs 7.9+/-0.6 nmol/l; androstenedione 11.8+/-0.8 vs 8.2+/-0.6 nmol/l) and more hirsute (modified Ferriman-Gallwey score, 17.7+/-1.6 vs 3.0+/-0.3) than healthy women. In addition, women with PCOS had higher 17-OHP and androstenedione responses to ACTH when compared with healthy women. Metformin therapy resulted in some improvement in insulin sensitivity and reduced the basal and post-glucose load insulin levels. But 17-OHP and androstenedione responses to ACTH were unaltered in response to metformin. CONCLUSIONS: PCOS is characterized by hyperactivity of the adrenal P450c17alpha enzyme and insulin resistance. It seems that there is no direct relationship between insulin resistance and adrenal P450c17alpha enzyme dysregulation.

Metformin therapy improves coronary microvascular function in patients with polycystic ovary syndrome and insulin resistance

2006 ◽  
Vol 65 (1) ◽  
pp. 75-80 ◽  
Author(s):  
Semra Topcu ◽  
Derya Tok ◽  
Mustafa Caliskan ◽  
Emel Ebru Ozcimen ◽  
Hakan Gullu ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Microvascular Function ◽  
Ovary Syndrome ◽  
Metformin Therapy ◽  
Coronary Microvascular Function

1186-P: Lean Women with Polycystic Ovary Syndrome and Insulin Resistance Have Normal Incretin Effect, which Is Unaffected by Metformin Therapy

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 1186-P
Author(s):  
LOUISE VEDTOFTE ◽  
SIGNE FOGHSGAARD ◽  
LOUISE ZIERAU ◽  
TINA VILSBØLL ◽  
FILIP K. KNOP
Keyword(s):  
Insulin Resistance ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Incretin Effect ◽  
Ovary Syndrome ◽  
Metformin Therapy

scholarly journals Therapeutic effects of metformin on insulin resistance and hyperandrogenism in polycystic ovary syndrome

1998 ◽  
pp. 269-274 ◽  
Author(s):  
E Diamanti-Kandarakis ◽  
C Kouli ◽  
T Tsianateli ◽  
A Bergiele
Keyword(s):  
Insulin Resistance ◽  
Polycystic Ovary Syndrome ◽  
Polycystic Ovary ◽  
Free Testosterone ◽  
Sex Hormone Binding Globulin ◽  
Therapeutic Effects ◽  
Obese Women ◽  
Ovary Syndrome ◽  
Before And After ◽  
Ovarian Hyperandrogenism

Evidence suggests that insulin resistance and hyperinsulinaemia are associated with ovarian hyperandrogenism and menstrual irregularities in polycystic ovary syndrome (PCOS). Sixteen obese women with PCOS on a weight-maintaining diet were studied before and after 6 months of therapy with the insulin-sensitizing antidiabetic agent metformin at a dose of 1700 mg per day. Compared with baseline values, glucose utilization was markedly enhanced at 6 months using the two-step euglycaemic-hyperinsulinaemic clamp to measure changes in insulin sensitivity (2.56 +/- 0.32 vs 4.68 +/- 0.49 mg/kg per min, P = 0.0001, when 40 mU insulin/m2 per min was infused, and 6.48 +/- 0.58 vs 9.84 +/- 0.72 mg/kg per min, P = 0.0002, when 400 mU insulin insulin/m2 per min was infused). The improvement in insulin action was accompanied by significant increases in the levels of sex hormone-binding globulin (24.5 +/- 7.2 vs 39.8 +/- 16.2 nmol/l, P = 0.003) and decreases in free testosterone (12.8 +/- 5.8 vs 9.0 +/- 3.0 pmol/l, P = 0.03) and androstenedione (12.9 +/- 5.6 vs 7.3 +/- 1.7 nmol/l, P = 0.003). No significant changes were recorded in body weight. Seven subjects resumed normal menstruation and two cases of spontaneous pregnancy occurred during treatment. Metformin was well tolerated except for one case of flatulence. These results confirm that metformin treatment can lead to improvements in insulin resistance and ovarian hyperandrogenism.

Lipocalin-2 Level in Patients with Polycystic Ovary Syndrome: Association with Insulin Resistance and Metformin Therapy

QJM ◽  
2021 ◽  
Vol 114 (Supplement_1) ◽  
Author(s):  
Mohamed Reda Halawa ◽  
Laila Mahmoud Ali Hendawy ◽  
Alaa Sayed Hassanin ◽  
Salah Hussein Ali El Halawany ◽  
Hanem Ibrahim Abdel Fattah Abdel Kader
Keyword(s):  
Insulin Resistance ◽  
Waist Circumference ◽  
Polycystic Ovary Syndrome ◽  
Weight Reduction ◽  
Polycystic Ovary ◽  
P Value ◽  
Lipocalin 2 ◽  
Ovary Syndrome ◽  
Metformin Therapy ◽  
Pcos Group

Abstract Background PCOS appears to be associated with an increased risk of metabolic aberrations, including insulin resistance and hyperinsulinemia, type 2 diabetes mellitus, dyslipidemia, and cardiovascular disease throughout womens’ lifespan. Obesity is a state of chronic low-grade systemic inflammation. This chronic inflammation is characterized by abnormal cytokine production and activation of inflammatory signaling pathways in adipose tissues, which contributes to insulin resistance and its related diseases such as PCOS and metabolic syndrome. Objective To evaluate Lipocalin-2 level in a sample of Egyptian females with PCOS and study the effect of metformin therapy on Lipocalin-2 level in patients with PCOS. Methods This case control study was conducted on 52 females, collected from the outpatient obstetrics and gynaecology clinics of Ain Shams University Hospitals from June 2018 to March 2019, their age ranged between 17-43 years old. divided into 2 groups: Group (I) 32 women with polycystic ovary syndrome According to the Rotterdam diagnostic criteria of PCOS, and Group (II) 20 healthy women old with normal ovulatory cycle as a control group. All subjects were subjected to full medical history taking, thorough physical examination including BMI and waist circumference. Fasting plasma glucose, Fasting s.insulin, HOMA-IR, lipocalin-2 level were assessed. Results Serum lipocalin-2 levels did not differ between patients with PCOS and BMI-matched healthy controls (P-value 0.193), and there was no significant difference between the 2 studied groups as regard HOMA-IR (p = 0.375). Metformin therapy for 3 months in patients with PCOS in the present study, resulted in significant reduction in lipocalin-2 level (p-value<0.01), (mean 54.2±15.3ng/ml before metformin therapy vs 42.9±14.2 ng/ml after metformin therapy). Moreover, metformin therapy in PCOS group resulted in significant reduction in weight, BMI, waist circumference and HOMA-IR. Furthermore, linear regression analysis for the parameters affecting lipocalin level in our study, showed that BMI was the only significant confounder affecting lipocalin level. So, the reduction in lipocalin level following metformin therapy in PCOS group in our study may be due to weight reduction perse. Conclusion PCOS per se is not associated with elevated serum lipocalin-2 levels. Metformin therapy induces a significant reduction in serum lipocalin-2 levels, weight, BMI, waist circumference and HOMA-IR in patients with PCOS. Reduction of BMI was the only significant confounder affecting lipocalin level after metformin therapy. So the reduction in lipocalin level following metformin therapy in patients with PCOS in our study may be due to weight reduction perse.

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