A comparison of brown fat tissue related hormone levels in metabolically healthy and unhealthy individuals with obesity.

PURPOSE: One of the key functions of brown adipose tissue is its positive impact on metabolism. This study aimed to examine the potential involvement of brown fat-related hormones in the development of metabolically healthy obesity. Specifically, we sought to compare the levels of NRG4, FGF21, and irisin between metabolically healthy and unhealthy individuals with obesity. METHODS: Patients with BMI ≥ 30 kg/m2 and aged between 20 and 50 years were included in the study. Among these patients, those who did not have any metabolic syndrome criteria except for increased waist circumference were defined as metabolically healthy obese. Age, gender, BMI, body fat, and muscle mass, matched metabolically healthy and unhealthy obese groups were compared in terms of FGF21, irisin, and NRG4 levels. RESULTS: Metabolically healthy and unhealthy obese groups were similar in terms of age and gender. There was no difference between the two groups in terms of BMI, weight, total body fat, muscle, fat-free mass, distribution of body fat and muscle mass. No statistically significant difference was found between irisin, NRG4, and FGF21 levels between metabolically healthy and unhealthy individuals with obesity. It was found that irisin had a significant inverse correlation with BMI and body fat percentage. CONCLUSION: The present study showed no difference between metabolically healthy and unhealthy obese individuals in terms of irisin, FGF21, and NRG4 levels. The weak association between irisin and BMI and body fat percentage may suggest a potential link between irisin with metabolic health.

The Validity and Reliability of the Turkish Version of Jefferson Scale of Physician Lifelong Learning for Medical Students.

OBJECTIVE: Lifelong Learning is a voluntary and self-motivated form of learning that lasts from birth to death for personal and professional reasons. As medical science has a dynamic nature, the knowledge gained in the faculty of medicine mostly will not be enough in the later professional life. The aim of this study is to determine the validity and reliability of the JeffSPLL-MS© in Turkish. METHOD: Linguistic equivalence analysis was applied first, and confirmatory factor analysis (CFA) was utilized in order to test the construct validity. Concurrent validity was tested by simultaneous administration of Lifelong Learning Trends Scale (LLTS) and JeffSPLL-MS©. Finally, internal consistency and test-retest reliability of the scores gathered from the scales in the study were calculated. RESULTS: Linguistic equivalence study supplied that there is a strong relationship (r=.873, p=.001) between Turkish and English forms of the scale. For CFA, Kaiser Meyer Olkin (KMO) value was .863 and the results of Bartlett Sphericity Test were appropriate (X2 = 1173,6; p=.001, df=91); model-data fit indices for JeffSPLL-MS© with 14 items in three factors were also satisfactory ((X2/df =1,51); RMSEA=0,046; NFI=0,918; RFI=0,902; CFI=0,971) and factor loadings of items were ranging between.522 and.764. The Pearson correlation coefficient as the indicator of concurrent validity of the scales LLTS and JeffSPLL-MS© was calculated as .624 (p=.001). The internal consistency (Cronbach alpha) of the total scores gathered from JeffSPLL-MS© is .843 and stratified alpha coefficient is .892. Cronbach alpha values for the subscales are as follows: .830 (F1=Learning beliefs and motivation), .719 (F2=Skills in seeking information), .721 (F3=Attention to learning opportunities). The test-retest reliability values for the scale, and its subscales were ranged between.709 and.812 within a four-week period. CONCLUSION: It is concluded that JeffSPLL-MS© can be used as a valid and reliable measurement instrument for medical education studies in Turkey.

Effect of Repeated Sterilization by Different Methods on Strength of Carbon Fiber Rods Used in External Fixator Systems.

OBJECTIVES: We aimed to study the effects of repeated sterilization, using different methods, on the carbon fiber rods of external fixator systems. METHODS: We used a randomized set of 44 unused, unsterilized, and identical carbon fiber rods (11 × 200 mm), randomly assigned to 2 groups: unsterilized (4 rods) and sterilized (40 rods). The sterilized rods were divided into 2 groups, those sterilized in an autoclave and those sterilized using hydrogen peroxide. These were further divided into 5 subgroups based on the number of sterilization repetition to which the fibers were subjected (25, 50, 75, 100, and 200). A bending test was conducted to measure the maximum bending force, maximum deflection, flexural strength, maximum bending moment and bending rigidity. We also measured the surface roughness of the rods. RESULTS: An increase in the number of sterilization repetition led to a decrease in maximum bending force, maximum bending moment, flexural strength, and bending rigidity, but increased maximum deflection and surface roughness (P < 0.01). The effect of the number of sterilization repetition was more prominent in the hydrogen peroxide group. CONCLUSIONS: This study revealed that the sterilization method and number of sterilization repetition influence the strength of the carbon fiber rods. Increasing the number of sterilization repetition degrades the strength and roughness of the rods.

A comparison of metacognitive factors among patients with cancer and the control group.

OBJECTIVE: Research examining the relationship between metacognitions and cancer has only recently begun to emerge. This study attempted to compare the metacognitions of the patients with and without cancer. The effects of stage of cancer, type of cancer, and treatment modality (chemotherapy, radiotherapy, operation) on metacognitions were investigated. Patients with cancer were hypothesized to have higher levels of negative metacognitions. METHODS: Participants were patients with cancer (N = 279) and patients without cancer (control group, N = 212). The Metacognition Questionnaire-30 was administered to all participants. Results were analyzed according to demographic and histopathological characteristics of the patients. RESULTS: The results showed that patients with different cancer diagnoses scored higher than the controls on all subscales of the MCQ-30. Those who received chemotherapy scored the highest on the MCQ-30. The patients who were in early stages of cancer had higher levels of negative metacognitions. Patients who did not have operation but had chemotherapy had the highest levels of negative metacognitions. Patients who were in locally advanced stage, did not have operation but had received or was receiving chemotherapy had the highest levels of negative metacognitions. CONCLUSIONS: Patients who were in early stages of cancer appeared to be in greater need for psychological help and access to services. Findings indicated a need for psychological support for patients who undergo chemotherapy.

Skin findings in autoimmune and nonautoimmune thyroid disease with respect to thyroid functional status and healthy controls.

BACKGROUND/AIM: Thyroid disorders are associated with a wide variety of skin disorders that respond to treatment of hormone imbalance in most cases and thus are of vital importance to dermatologists. This study aimed to evaluate skin findings associated with autoimmune and nonautoimmune thyroid disease with respect to thyroid functional status and healthy controls. MATERIALS AND METHODS: A total of 300 consecutive patients with either autoimmune (n = 173) or nonautoimmune (n = 127) thyroid disease and 100 healthy control subjects were included in this cross-sectional study. Data on patient demographics, thyroid function tests, and skin findings were recorded for patient and control groups. RESULTS: Compared to control subjects, patients had higher proportions in populations with alopecia (P < 0.001), nail thinning (P = 0.02), brittle nails (P = 0.001), pruritus (P < 0.001), diffuse hyperhidrosis (P = 0.01), flushing (P = 0.001), and xerosis (P < 0.001). Onycholysis (P = 0.02), yellow skin (P = 0.04), periorbital edema (P = 0.03), psoriasis (P = 0.001), and palmoplantar hyperkeratosis (P = 0.007) were significantly more common in patients with autoimmune than nonautoimmune thyroid disease. A significantly higher percentage of patients with autoimmune rather than nonautoimmune thyroid disease had overall skin findings (P = 0.03) among the hyperthyroid patients.Conclusions: Our findings indicate that the presence of skin findings in a majority of thyroid patients significantly differs for certain cutaneous manifestations with respect to controls, autoimmune etiology, and thyroid functional status.

Evaluation of Stress Scores Throughout Radiological Biopsies.

BACKGROUND: Ultrasound-guided biopsy procedures are the most prominent methods that increase the trauma, stress and anxiety experienced by the patients. OBJECTIVES: Our goal was to examine the level of stress in patients waiting for radiologic biopsy procedures and determine the stress and anxiety level arising from waiting for a biopsy procedure. PATIENTS AND METHODS: This prospective study included 35 female and 65 male patients who were admitted to the interventional radiology department of Kartal Dr. Lütfi Kirdar training and research hospital, Istanbul between the years 2014 and 2015. They filled out the adult resilience scale consisting of 33 items. Patients who were undergoing invasive radiologic interventions were grouped according to their phenotypic characteristics, education level (low, intermediate, and high), and biopsy features (including biopsy localization: neck, thorax, abdomen, and bone; and the number of procedures performed, 1 or more than 1). Before the biopsy, they were also asked to complete the depression-anxiety-stress scale (DASS 42), state-trait anxiety inventory scale (STAI-I), and continuous anxiety scale STAI-II. A total of 80 patients were biopsied (20 thyroid and parathyroid, 20 thorax, 20 liver and kidney, and 20 bone biopsies). The association between education levels (primary- secondary, high school and postgraduate) and the number of biopsies (1 and more than 1) with the level of anxiety and stress were evaluated using the above-mentioned scales. RESULTS: Evaluation of sociodemographic and statistical characteristics of the patients showed that patients with biopsy in the neck region were moderately and severely depressed and stressed. In addition, the ratio of severe and extremely severe anxiety scores was significantly high. While the STAI-I and II scores were lined up as neck > bone > thorax > abdomen, STAI-I was higher in neck biopsies compared to thorax and abdomen biopsies. Regarding STAI-I and II scales, patients with neck biopsy had the highest anxiety score. CONCLUSION: We believe that active briefing of patients who need to undergo neck and bone biopsies and have high anxiety score by healthcare personnel is an effective method to control psychological mood and increase the efficiency of treatment.

Impaired Gallbladder Motility and Increased Gallbladder Wall Thickness in Patients with Nonalcoholic Fatty Liver Disease.

BACKGROUND/AIMS: Nonalcoholic fatty liver disease (NAFLD) is currently the most common chronic liver disease worldwide. Along with the increase in the incidence of NAFLD and associated obesity, an increase in gallbladder disease (GD) has been noted. This has led to the identification of a new disease entity called fatty GD. There is a gap in the literature on the dynamics of gallbladder function in patients with NAFLD. METHODS: An observational case-control study, a total of 50 patients with biopsy proven NAFLD without gallbladder stone/sludge and 38 healthy comparison subjects were enrolled. Fasting, postprandial gallbladder volumes (PGV), gallbladder ejection fraction (GEF), and fasting gallbladder wall thickness (FGWT) were measured by real-time 2-dimensional ultrasonography. RESULTS: Fasting gallbladder wall thickness, fasting gallbladder volumes and PGV were significantly higher in patients with NAFLD than control subjects (P < 0.001, P = 0.006, and P < 0.001, respectively). Gallbladder ejection fraction was significantly lower in the NAFLD group than the controls (P = 0.008). The presence of NAFLD was an independent predictor for GEF, PGV, and FGWT. Also, steatosis grade was an independent predictor for GEF, and GEF was significantly lower in the nonalcoholic steatohepatitis (NASH) subgroup than the controls. CONCLUSIONS: Gallbladder dysfunction and increase in gallbladder wall thickness exists in asymptomatic (without stone/sludge and related symptoms) patients with NAFLD and are useful in identifying fatty GD. Measurement of these variables in NAFLD patients may be useful in identifying those at higher risk for GD.

Protective Effects of Curcumin on Intestinal Damage in Cholestatic Rats.

BACKGROUND: The aim of this study was to evaluate the possible protective effects of curcumin on oxidative stress, cell proliferation, and apoptosis in the rat intestinal mucosa after bile duct ligation (BDL). METHODS: A total of 18 male Sprague Dawley rats were divided into three groups: sham control, BDL and BDL+curcumin; each group contain six animals. The rats in the curcumin-treated group were given curcumin (100 mg/kg) once a day orally for 14 days, starting 3 days prior to BDL operation. Following 14 days of treatment, all the animals were decapitated and intestinal tissues samples obtained for biochemical and histopathological investigation. RESULTS: Curcumin treatment was found to significantly lower elevated tissue malondialdehyde levels and myeloperoxidase activity, and to raise reduced glutathione levels in intestinal tissues samples. BDL caused severe histopathological injury, including shortening of the villi, loss of villous epithelium, multiple erosions, inflammatory cell infiltration, necrosis, and hemorrhage into the intestinal wall. Curcumin treatment significantly attenuated the severity of intestinal injury, with inhibition of BDL-induced apoptosis and cell proliferation. CONCLUSION: Curcumin treatment has a protective effect against intestinal damage induced by BDL. The ability of curcumin treatment is to inhibit BDL-induced oxidative stress, apoptosis, and cell proliferation.

Lowering Uric Acid With Allopurinol Improves Insulin Resistance and Systemic Inflammation in Asymptomatic Hyperuricemia.

BACKGROUND: Hyperuricemia is an independent predictor of impaired fasting glucose and type 2 diabetes, but whether it has a causal role in insulin resistance remains controversial. Here we tested the hypothesis that lowering uric acid in hyperuricemic nondiabetic subjects might improve insulin resistance. METHODS: Subjects with asymptomatic hyperuricemia (n = 73) were prospectively placed on allopurinol (n = 40) or control (n = 33) for 3 months. An additional control group consisted of 48 normouricemic subjects. Serum uric acid, fasting glucose, fasting insulin, HOMA-IR (homeostatic model assessment of insulin resistance), and high-sensitivity C-reactive protein were measured at baseline and at 3 months. RESULTS: Allopurinol-treated subjects showed a reduction in serum uric acid in association with improvement in fasting blood glucose, fasting insulin, and HOMA-IR index, as well as a reduction in serum high-sensitivity C-reactive protein. The number of subjects with impaired fasting glucose significantly decreased in the allopurinol group at 3 months compared with baseline (n = 8 [20%] vs n = 30 [75%], 3 months vs baseline, P < 0.001). In the hyperuricemic control group, only glucose decreased significantly and, in the normouricemic control, no end point changed. CONCLUSIONS: Allopurinol lowers uric acid and improves insulin resistance and systemic inflammation in asymptomatic hyperuricemia. Larger clinical trials are recommended to determine if lowering uric acid can help prevent type 2 diabetes.

A potential treatment of non-alcoholic fatty liver disease with SIRT1 activators.

Sirtuins (SIRTs) are members of the silent information regulator-2 family and act as nicotinamide adenine dinucleotide (NAD+)-dependent histone/protein deacetylases. The de-acetylation of proteins and histones results in an up- or down-regulation of gene transcription and protein function. In recent years, the regulatory action of the deacetylation activity of SIRT1 has been shown to have a positive impact on the pathophysiological mechanisms of nonalcoholic fatty liver disease (NAFLD). Among the effects of SIRT1 are: its healing activity on insulin sensitivity, thereby ameliorating glycemic regulation; its mimetic activity on calorie restriction; its antihyperlipidemic activity on lipid homeostasis via the liver, adipose tissues and skeletal muscles; its anti-inflammatory activities; its protective effects against cardiovascular events and endothelial dysfunction; its positive influence on autophagy, apoptosis and cancer; and finally, its anti-aging activity. The current approach for the treatment of NAFLD involves the treatment of etiological factors and recommendation of life-style changes including more physical activity and a low-calorie diet. However, there is no specific medical treatments for NAFLD. The therapeutic potential of SIRT1 activity in the treatment of NAFLD discovered in humans has been presented in this article. In this review, the potential effects of SIRT1 activation on NAFLD-related pathophysiological mechanisms and on the treatment of NAFLD are discussed.