Serum total L-carnitine levels in non-obese women with polycystic ovary syndrome

BACKGROUND: Carnitine plays essential roles in energy production, oxidative stress and glucose metabolism. This study was planned to determine serum total l-carnitine levels in non-obese women with polycystic ovary syndrome (PCOS). METHODS: There were 27 non-obese women with PCOS and 30 healthy, age- and body mass index (BMI) matched controls were evaluated in this controlled clinical study. Serum lipid sub-fractions, fasting glucose, insulin and other hormones (gonadotrophins, androgens) and total l-carnitine levels were measured. Homeostasis model assessment (HOMA-IR) was used to estimate insulin resistance. RESULTS: The women with PCOS had significantly higher serum dehydroepiandrosterone sulfate, total testosterone, free androgen index (FAI), luteinizing hormone (LH), low-density lipoprotein (LDL) cholesterol, non-high density lipoprotein (HDL) cholesterol, fasting insulin levels and HOMA-IR measurement and LH/FSH ratios than healthy women. However, total l-carnitine and sex hormone-binding globulin (SHBG) levels were significantly lower in women with PCOS. l-Carnitine level was negatively correlated with FAI, but positively correlated with SHBG. Multiple regression analysis revealed that SHBG was a strong predictor of serum total l-carnitine level. CONCLUSIONS: Decreased total l-carnitine levels may be associated with hyperandrogenism and/or insulin resistance in non-obese women with PCOS. Long-term studies are needed to evaluate carnitine metabolism in PCOS, especially with regard to the molecular basis. © The Author 2008. Published by Oxford University Press on behalf of the European Society of Human Reproduction and Embryology. All rights reserved

Biological activities of Liquidambar orientalis: antibiofilm, cytotoxicity, apoptosis, and miRNA expressions

Due to its strong biological, pharmacological, and medical activities and rich chemical content, Liquidambar orientalis, known for its resinous exudate storax, has a widespread and well-established ethnopharmacological use. Although it is known that storax has anticancer, antimicrobial, antioxidant, wound-healing and other ethnomedicinal properties, the number of existing scientific studies is very limited. In this context, the aims of this study were to determine the antibiofilm activity of storax and its cytotoxic and apoptotic effects in A549 lung cancer cells. In addition, with this study, it is also possible to make a very comprehensive biological evaluation by determining the effect of storax on certain microRNA expressions. According to our results, L. orientalis storax decreases cell proliferation in A549 lung cancer cells and the IC50 value was determined at 31.5 μg/mL at 24h. Storax also induces apoptosis via upregulating CASP3, 8, 9, and Bax gene expression and downregulating Bcl-2 expressions in A549 cells. Furthermore, storax decreases the expression of miR-146a, miR-21, and miR-223, while increasing the expression of miR-155. Storax inhibits biofilm formation and reduces the preformed biofilm of microbial strains including Staphylococcus aureus (ATCC 33862), Pseudomonas aeruginosa (ATCC 27853) and Candida albicans (ATCC 64548). The results suggest that storax has strong cytotoxic, apoptotic and antibiofilm properties and thus promising potential in medicine

Decreased total antioxidant status and increased oxidative stress in women with polycystic ovary syndrome may contribute to the risk of cardiovascular disease

Objective: To determine oxidative stress by the level of protein carbonyls and total antioxidant status (TAOS), and whether oxidative stress is associated with increased risk of cardiovascular disease in women with polycystic ovary syndrome (PCOS). Design: Controlled clinical study. Setting: University hospital. Patient(s): Thirty women with PCOS and 31 healthy control women. Intervention(s): Biometric measures and blood samples collection. Main Outcome Measure(s): C-reactive protein (CRP), lipid fractions, glucose, protein carbonyls, insulin, and other hormone (gonadotropins, androgens) levels and TOAS were measured. The estimate of insulin resistance was calculated by homeostasis model assessment (HOMA-R). Result(s): The women with PCOS had significantly higher serum fasting insulin, CRP, protein carbonyl levels, HOMA-R, LH levels, and LH/FSH ratios than healthy women. However, TAOS was significantly lower in women with PCOS. TAOS was negatively correlated with fasting insulin, HOMA-R, CRP, and protein carbonyls. Fasting insulin was positively correlated with protein carbonyls. High density lipoprotein (HDL) was inversely associated with fasting insulin, HOMA-R, and protein carbonyls. Conclusion(s): Increased oxidative stress and decreased antioxidant capacity may contribute to the increased risk of cardiovascular disease in women with PCOS, in addition to known risk factors such as insulin resistance, hypertension, central obesity, and dyslipidemia. © 2003 by American Society for Reproductive Medicine

LID - 10.1111/cxo.12969 [doi]

BACKGROUND: The aim of this study was to investigate the effect of microalbuminuria on corneal endothelium in patients with diabetes without retinopathy. METHODS: This cross-sectional study comprised 100 patients with type 2 diabetes mellitus (DM) without diabetic retinopathy and 92 control subjects without diabetes. Forty-five patients had microalbuminuria and 55 subjects were microalbuminuria negative. Endothelial measurements were obtained using specular microscopy. Endothelial cell density, average area, co-efficient of variation, maximum area, minimum area, hexagonality and corneal thickness were compared between the groups on the basis of microalbuminuria, DM duration and medication, HbA(1c) , body mass index, serum lipid and protein profiles, hypertension and hyperlipidaemia diagnosis. RESULTS: There were no significant differences in age, gender, endothelial cell density, average area, co-efficients of variation, maximum area, minimum area, hexagonality or corneal thickness among the microalbuminuria positive, microalbuminuria negative and control groups (p > 0.05). However, microalbuminuria positive patients had lower high-density lipoprotein levels than the microalbuminuria negative patients (p = 0.042). DM and control groups showed similar endothelial measurements (p > 0.05). Patients with a HbA(1c) > 7 per cent (53 mmol/mol) had lower hexagonality value (p = 0.039) than in the subjects with a HbA(1c) ≤ 7 per cent. No significant differences were found in endothelial parameters when groups were compared based on DM duration, medication and co-morbidities. CONCLUSIONS: Microalbuminuria positive and negative patients with DM without retinopathy seem to have similar corneal endothelial measurements with controls. However, patients with a HbA(1c) > 7 per cent should be monitored for deterioration in corneal endothelial cell morphology even without diabetic retinopathy, which might be critical prior to anterior segment surgery

Effect of microalbuminuria on corneal endothelium in patients with diabetes without retinopathy

Background: The aim of this study was to investigate the effect of microalbuminuria on corneal endothelium in patients with diabetes without retinopathy. Methods: This cross-sectional study comprised 100 patients with type 2 diabetes mellitus (DM) without diabetic retinopathy and 92 control subjects without diabetes. Forty-five patients had microalbuminuria and 55 subjects were microalbuminuria negative. Endothelial measurements were obtained using specular microscopy. Endothelial cell density, average area, co-efficient of variation, maximum area, minimum area, hexagonality and corneal thickness were compared between the groups on the basis of microalbuminuria, DM duration and medication, HbA1c, body mass index, serum lipid and protein profiles, hypertension and hyperlipidaemia diagnosis. Results: There were no significant differences in age, gender, endothelial cell density, average area, co-efficients of variation, maximum area, minimum area, hexagonality or corneal thickness among the microalbuminuria positive, microalbuminuria negative and control groups (p > 0.05). However, microalbuminuria positive patients had lower high-density lipoprotein levels than the microalbuminuria negative patients (p = 0.042). DM and control groups showed similar endothelial measurements (p > 0.05). Patients with a HbA1c > 7 per cent (53 mmol/mol) had lower hexagonality value (p = 0.039) than in the subjects with a HbA1c ≤ 7 per cent. No significant differences were found in endothelial parameters when groups were compared based on DM duration, medication and co-morbidities. Conclusions: Microalbuminuria positive and negative patients with DM without retinopathy seem to have similar corneal endothelial measurements with controls. However, patients with a HbA1c > 7 per cent should be monitored for deterioration in corneal endothelial cell morphology even without diabetic retinopathy, which might be critical prior to anterior segment surgery. © 2019 Optometry Australi

Early retinal neurodegeneration in preclinical diabetic retinopathy: a multifactorial investigation.

BACKGROUND/OBJECTIVES: To investigate effects of microalbuminuria (MA), diabetes duration, glycosylated haemoglobin (HbA1c) level, hypertension (HT) and/or hyperlipidaemia (HL) coexistence on retinal layers in diabetic patients without diabetic retinopathy (DR) using spectral-domain optical coherence tomography (SD-OCT). SUBJECTS/METHODS: This cross-sectional study involved 95 (45 had MA and 50 had no MA) patients with type 2 diabetes mellitus (DM) without DR and 91 age- and gender-matched non-diabetic controls. Macular and peripapillary SD-OCT measurements (Heidelberg Engineering GmbH, Heidelberg, Germany), DM duration, HbA1c levels and presence of HT and/or HL were used for statistical analyses. RESULTS: The MA (+), MA (-) and control groups had similar age and gender distribution (p > 0.05). The differences in SD-OCT measurements among the MA (+), MA (-) and control groups were insignificant (p > 0.05). However, diabetic patients (n = 95) had significantly thinner inferior-temporal peripapillary retinal nerve fibre layer (RNFL) (p = 0.042) than in the controls (n = 91). Superior peripapillary RNFL was significantly thinner in patients with an HbA1c level > 7% (p = 0.049). However, 3 mm-nasal, temporal and superior perifoveal thicknesses were significantly lower in patients with DM duration over 10 years (p < 0.05). HT and/or HL coexistence did not lead a significant difference in SD-OCT parameters among the groups. CONCLUSIONS: In diabetic patients without DR, peripapillary inferior-temporal RNFL thinning might be an early sign of neuroretinal degeneration and it seems to be independent from vascular endothelial damage (MA). Poor metabolic control appears to lead superior peripapillary RNFL thinning, while perifoveal thicknesses tend to decrease with longer DM duration