ACTA ENDOCRINOLOGICA (BUC)

Context. Papillary thyroid carcinoma(PTC)s are the indolent progressive tumours. Survivin is a unique bifunctional protein with cell cycle regulation and apoptosis inhibition. The expression of this protein has been shown to be increased in thyroid tumours correlated with aggressive behavior from well differentiated to anaplastic. Objective. In this study, we aimed to investigate the relationship between immunohistochemically survivin expression and tumour-associated prognostic factors in papillary thyroid carcinomas. Design. In patients with thyroidectomy, we compared the clinicopathological findings and immunohistochemical positivity for survivin. Subjects and Methods. In 109 patients, sex, age, tumour size, histological tumour variant, tumour focality, tumour border pattern, tumour peripheral/intratumoural lymphocytic and stromal response, intraglandular spread, extrathyroideal spread, lymph node metastases, lymphocytic tiroiditis and relationships of these findings with survivin positivity were investigated. Results. When we indicated the tumour size and compared it with survivin expression, tumour size correlates with, survivin expression (p = 0.016). Survivin expression was correlated statistically significant with lymphovascular invasion, without stromal response and with intraglandular extension respectively (p<0.001, p = 0.043, p<0.001). No significant correlation was found between other clinicopathological parameters and survival. Conclusion. Few studies have investigated the relationship of survivin expression with prognosis in thyroid papillary carcinomas and showed that survivin was a poor prognostic marker. If its expression is detected in preoperative cytology smears, it may affects the surgical treatment strategy. When it is detected in the tissue, postoperative radioactive iodine treatment plan may be modified and the need for more aggressive follow-up may be considered.

Context. Patients with Cushing’s syndrome (CS) of any etiology experience a number of physical and psychological symptoms which impact negatively on healthrelated quality of life (HRQoL). Subjects and methods. HRQoL was measured using CushingQoL questionnaire. Results. The first part of our study was a crosssectional analysis of 141 patients with CS over a 10-year period. CushingQoL score was lower in pituitary CS compared to adrenal CS. Remission and older age were associated with better outcome on item 7 (physical appearance anxiety). In a multivariate regression analysis after adjustment for etiology, remission status, age, UFC, duration of hypercortisolism and presence of hypercortisolism-associated comorbidities the female gender was the only negative predictor associated with poorer outcome on each of the three scores. The presence of hypercortisolism-associated comorbidities independently predicted poorer outcome on the psychological and the global subscales. The second part of our research was a prospective study of 27 patients with adrenal adenoma. Achievement of remission independently predicted improvement of the total score of any patient. Conclusion. Studying in details and understanding the mechanisms of the impaired HRQoL in patients with CS is the only way to become aware of the problem and create methods that could help these patients.

Aim. To explore the effects and underlying mechanisms of pioglitazone (pio) on insulin sensitivity in insulin-resistant KKAy mice. Methods. Sixteen eight-week-old male KKAy mice were randomly assigned to two groups based on body weight: an insulin resistance model group and a pioglitazone treatment group (hereafter referred to as the pio-group). Eight male C57BL/6J mice were used as an insulin resistance control group. Mice in all three groups were fed an AIN-93G diet, and pio was added to the diet in the pio-group. After twelve weeks of treatment, blood glucose, serum insulin, glucose tolerance, and insulin tolerance were measured. ELISA was used to determine adiponectin and leptin in serum. A real time PCR assay was used to detect the mRNA of adiponectin and leptin in epididymal adipose tissue. A Western blot assay was used to analyze protein expression and/ or phosphorylation levels of peroxisome proliferator activated receptor γ (PPARγ), insulin receptor substrate 1 (IRS1), and protein kinase B (PKB/AKT) in the liver and epididymal adipose tissue.Results. The results showed that Pio treatment may effectively reduce levels of blood glucose and serum insulin, improve insulin tolerance and glucose tolerance, increase serum adiponectin, decrease serum leptin, and enhance mRNA expression of adiponectin in epididymal adipose tissue. Furthermore, with pio treatment, protein expression of PPARγ and phosphorylation levels of IRS1 and AKT were increased in the liver and epididymal adipose tissue. Conclusion. These results suggested that Pio intervention may ameliorate insulin resistance and improve insulin sensitivity in KKAy mice, which may be due to an increase of PPARγ and further activation of the insulin signaling transduction pathway (IRS1 and AKT) in the liver and epididymal adipose tissue of KKAy mice.

Aim. The purpose of this study is to investigate the effect of self-monitoring of blood glucose (SMBG) on glycemic control in insulin-naive type 2 diabetic patients comparing SMBG plus self-regulatory behavioral education, and SMBG plus individual education. Methods. Participants with glycated hemoglobin A1C (HbA1C) of 7.5-12% were enrolled in this 24-week, prospective study. Forty-two and forty participants received SMBG plus selfregulatory behavioral education, and SMBG plus individual education, respectively. The glycemic and behavioral attitudes outcomes were evaluated. Results. The A1C level decreased in both groups, from 9.41± 1.7% to 7.84± 0.83% in the SMBG plus self-regulatory behavioral education and 9.62 ±1.08% to 9.09± 1.1% in the SMBG plus individual education. However, the postprandial glucose (PPG) level sustained more significant decreases from 277.1 ±80.1 to 175.7 ±53.9 mg/dL in the SMBG plus self-regulatory behavioral education, and from 261.2 ±80.5 to 221.6 ±41.2 mg/dL in the SMBG plus individual education. The frequency of PPG monitoring increased from 0.1 ± 0.81 to 3.46 ± 2.81 times/week in SMBG plus self-regulatory behavioral education, whereas it increased from 0.13± 0.78 to 1.01± 0.89 in SMBG plus individual education. The amount of carbohydrates consumed per day decreased and the amount of physical activity performed per week increased significantly in self-regulatory behavioral education group. Conclusions. The use of this model of SMBG plus self-regulatory behavior education appears to have resulted in superior improvements in glycemic control and behavioral outcomes compared with those achieved by SMBG plus individual education.