Using PVA and TPGS as combined emulsifier in nanoprecipitation method improves characteristics and anticancer activity of ibuprofen loaded PLGA nanoparticles.

In the preparation of nanoparticles (NPs) by the nanoprecipitation method, emulsifiers play a key role for NPs' characteristics. The present study aimed to investigate the combined emulsifier effect on ibuprofen loaded poly(lactic-co-glycolic acid) (PLGA) NPs' characteristics and anticancer activity. Ibuprofen loaded PLGA NPs were prepared by nanoprecipitation using different concentrations of PVA (poly(vinyl alcohol)) or PVA-TPGS (d-α-tocopherol polyethylene glycol 1000 succinate) combination as emulsifier. It was found that encapsulation efficiencies of NPs varied between 17.9 and 41.9 % and the highest encapsulation efficiency was obtained with 0.5% PVA + 0.1% TPGS (coded as PLGA PVA/TPGS NPs). PLGA PVA/TPGS NPs were characterized and compared with PLGA PVA NPs, which was obtained by 0.5% PVA alone. Polydispersity index of PLGA PVA/TPGS and PLGA PVA NPs were found to be 0.08 and 0.15, respectively. Incorporation of TPGS with PVA slightly decreased the initial ibuprofen release. Transmission electron microscopy analyses demonstrated a nearly uniform particle size distribution and spherical particle shape of the PLGA PVA/TPGS NPs. Additionally, PLGA PVA/TPGS NPs were significantly more cytotoxic than PLGA PVA NPs on the MCF-7 (human breast adenocarcinoma cells) and Caco-2 (human epithelial colorectal adenocarcinoma) cells (p<0.05). Also PLGA PVA/TPGS NPs were not cytotoxic on normal cells (L929, mouse healthy fibroblast cells) (p>0.05). In conclusion, these results indicated that using a combination of TPGS and PVA as an emulsifier in nanoprecipitation could be a promising approach for preparing ibuprofen loaded PLGA NPs because of their improved characteristics and anticancer activity.

Is NAFLD an independent risk factor for increased IMT in T2DM?

AIM: Recent data have suggested that the presence of non-alcoholic fatty liver disease (NAFLD) in type 2 diabetes mellitus may also be linked to increased risk of cardiovascular disease (CVD) independent from metabolic syndrome. Therefore the aim of the study is to compare the CVD risk in diabetic and non diabetic participants and to evaluate whether there is an association betweeen NAFLD and CVD risk. METHODS: Fifty five type 2 diabetic (study group) and 44 nondiabetic patients (control group) were included in the study. Patients were divided into two groups according to degree of hepatosteatosis. Group 1 include grade≥2 hepatosteatosis and group 2 include grade<2 hepatosteatosis patients. RESULTS: As a result, hepatosteatosis rates were found to be similar in diabetic and non-diabetic patients (P=0.07). Mean CIMT was significantly higher in diabetic patients (P=0.01). Mean fasting plasma glucose (FPG) and glucolise hemoglobin (HbA1c) were found to be higher in grade≥2 hepatosteatosis group (P=0.002 and 0.004 respectively). But CIMT was found to be similar between hepatosteatosis groups (P=0.618). CONCLUSION: NAFLD is extremely common in people with type 2 diabetes and is mainly associated with uncontrolled diabetes. CIMT values as cardiovascular risk assessment were found to be significantly higher in diabetic patients regardless degree of hepatosteatosis.

Oxidative stress markers are not valuable markers in lean and early age of polycystic ovary syndrome patients.

BACKGROUND: Early atherosclerosis and increased risk of cardiovascular diseases (CVD) have been reported in patients with polycystic ovary syndrome (PCOS). Oxidative stress is an accepted risk factor for the development of CVD. AIM: To evaluate the association between oxidative stress markers [ischemia-modified albumin (IMA), total antioxidant status (TAS), and total oxidant status (TOS) levels], carotid intima- media thickness (CIMT), endocrine and metabolic parameters in patients with PCOS. MATERIALS, SUBJECTS, AND METHODS: We studied 52 patients with PCOS and 36 age- and body mass index (BMI)-matched controls. The diagnosis of PCOS was made according to the Rotterdam criteria. Metabolic, hormonal parameter and IMA, TAS, TOS levels were measured. RESULTS: No statistically significant difference was determined in relation to age, BMI and waist-hip ratio, IMA, TAS, and TOS levels between groups. Mean IMA level was higher in PCOS patients, however, statistical significant difference was not observed. Mean CIMT and homeostasis model assessment of insulin resistance levels were significantly higher in patients with PCOS than in control subjects. CONCLUSION: Our study has shown that although CIMT levels, showing CVD risk, were higher in PCOS patients, TAS and TOS oxidative stress markers were found to be similar between groups, IMA was higher in PCOS patients however the difference was not reach statistical significant. The present results suggest that CIMT increases before the state of ischemia and shows preischemic state of vasculature, while oxidative stress markers are considered to be indicators of ischemia and reperfusion injury in progressive vascular disease. Further studies are needed to show the association between oxidative stress markers, CVD and PCOS.

Thyroid hormone receptor beta gene mutation (P453A) in a family producing resistance to thyroid hormone.

BACKGROUND: Resistance to thyroid hormone (RTH) is a dominantly inherited syndrome characterized by decreased responsiveness of target tissues to thyroid hormone. Two members of a Turkish family, a mother and son, had thyroid function tests suggestive of resistance to thyroid hormone (RTH). METHODS: The clinical presentation was, however, different. The mother (proposita) had palpitation, weakness, tiredness, nervousness, dry mouth and was misdiagnosed as having multinodular toxic goiter which was treated with antithyroid drugs and partial thyroidectomy. Her younger son had attention deficit hyperactivity disorder and primary encopresis, but normal intellectual quotient. Both had elevated serum iodothyronine levels with nonsuppressed thyrotropin. RESULTS: A mutation in one allele of the thyroid hormone receptor beta gene (P453A) was identified, providing a genetic confirmation for the diagnosis of RTH. CONCLUSION: Mutational analysis of the TRss gene allows definitive diagnosis of RTH, potentially avoiding the need for protracted and expensive pituitary function testing.

Sheehan's syndrome associated with Glanzmann's Thrombasthenia: case report and literature review.

OBJECTIVES: We aimed to present a case of Sheehan's syndrome associated with Glanzmann's thrombasthenia. CASE REPORT: A 41-year-old-woman presented with hemorrhagic diathesis needed blood transfusions occasionally during her life-time. In the course of her second delivery, four units of whole blood transfusion were required to control profuse uterine bleeding and her hemodynamic status. During postpartum period, she was not able to lactate and her menstrual periods did not return. Her hormonal profile revealed gonadotropin, TSH and prolactin deficiencies. CONCLUSION: According to our knowledge, this is the first case report of hypopituitarism developed after delivery in association with Glanzmann's thromboasthenia-induced severe uterine hemorrhage.

A national survey of Turkish emergency physicians perspectives regarding family witnessed cardiopulmonary resuscitation.

We investigated Turkish emergency physicians' views regarding family witnessed resuscitation (FWR) and to determine the current practice in Turkish academic emergency departments with regard to family members during resuscitation. A national cross-sectional, anonymous survey of emergency physicians working in academic emergency departments was conducted. Nineteen of the 23 university-based emergency medicine programs participated in the study. Two hundred and thirty-nine physicians completed the survey. Of the respondents, 83% did not endorse FWR. The most common reasons for not endorsing FWR was reported as higher stress levels of the resuscitation team and fear of causing physiological trauma to family members. Previous experience, previous knowledge in FWR, higher level of training and the acceptance of FWR in the institution where the participant works were associated with higher rates of FWR endorsement for this practice among emergency physicians.