PUNICALAGIN AND PUNICALIN SUPPRESS THE ADIPOCYTE DIFFERENTIATION THROUGH THE TRANSCRIPTION FACTORS.

BACKGROUND: Pomegranate is a rich source of many polyphenolic compounds including ellagitannins (punicalagin, punicalin and others). AIM: The effects of punicalagin and punicalin on adipogenesis were investigated in this study. MATERIALS AND METHODS: To examine the effect of punicalagin and punicalin on adipocyte differentiation, various concentrations of punicalagin and punicalin (2-10 µM) were applied to differentiated 3T3-L1 cells. Glyceraldehyde-3-phosphate dehydrogenase (GPDH) activity, Oil red O staining, intracellular triglyceride levels, and gene expressions of transcription factors (Peroxisome proliferator-activated receptor-γ (PPARγ), CCAAT-enhancer-binding proteins-α (C/EBPα), Sterol regulatory element-binding protein 1c (SREBP-1c)) and lipolysis-associated genes (hormone-sensitive lipase (HSL), Perilipin A, tumor necrosis factor-α (TNF-α)) were examined in order to investigate the effects of punicalagin and punicalin on adipocyte differentiation. RESULTS: Punicalagin and punicalin applications caused a continuous decrease in cell size and intracellular triglyceride accumulation. GPDH activity and transcription gene expressions decreased significantly in groups that were applicated punicalagin and punicalin at high concentrations. Punicalagin, but not punicalin, down-regulated the expression of HSL and perilipin A and up-regulated the expression of TNF-α in a dose-dependent manner. In conclusion, both punicalagin and punicalin were able to inhibit the adipocyte differentiation.

A Programmable Toolkit to Dynamically Signal Cells Using Peptide Strand Displacement.

The native extracellular matrix communicates and interacts with cells by dynamically displaying signals to control their behavior. Mimicking this dynamic environment in vitro is essential in order to unravel how cell-matrix interactions guide cell fate. Here, we present a synthetic platform for the temporal display of cell-adhesive signals using coiled-coil peptides. By designing an integrin-engaging coiled-coil pair to have a toehold (unpaired domain), we were able to use a peptide strand displacement reaction to remove the cell cue from the surface. This allowed us to test how the user-defined display of RGDS ligands at variable duration and periodicity of ligand exposure influence cell spreading degree and kinetics. Transient display of αVß3-selective ligands instructed fibroblast cells to reversibly spread and contract in response to changes in ligand exposure over multiple cycles, exhibiting a universal kinetic response. Also, cells that were triggered to spread and contract repeatedly exhibited greater enrichment of integrins in focal adhesions versus cells cultured on persistent RGDS-displaying surfaces. This dynamic platform will allow us to uncover the molecular code by which cells sense and respond to changes in their environment and will provide insights into ways to program cellular behavior.

Assessment of Anemia and Quality of Life in Patients With Renal Transplantation.

PURPOSE: Anemia is associated with poor quality of life in dialysis patients. However, data on this association are scarce on transplant patients. We aimed to find the frequency of anemia, and the effect of anemia on the quality-of-life parameters in patients who have undergone kidney transplantation. METHODS: Anemia was defined by a hemoglobin (Hgb) level of <12 g/dL and severe anemia by a Hgb level of <10 g/dL. All patients were evaluated with the Kidney Disease Quality of Life (KDQOL-SF) scale forms. RESULTS: Two hundred patients (128 male and 72 female; mean age, 39.2 ± 11.5 years) were examined. Anemia was found in 19% and severe anemia was found in 4.5% of all patients. Low glomerular filtration rate, young age, and female gender were demographic parameters associated with anemia. Parathormone levels were higher in the anemic group. The use of angiotensin converting enzyme inhibitors, angiotensin receptor blockers, and mammalian target of rapamycin inhibitors was significantly higher in the anemic group. In addition, patients with anemia had a lower KDQOL-SF mental health component score than that of the patients without anemia. CONCLUSIONS: Anemia was related to the degree of renal function in posttransplant patients. Anemia had an important influence on mental health in renal transplant patients.

Possible role of selective serotonin reuptake inhibitor sertraline on oxidative stress responses.

The naphthylamine derivative sertraline is a potent and selective inhibitor of serotonin reuptake into presynaptic terminals and the most widely used that has been shown to have both antidepressant and antianxiety effects. In the present study the possible role of sertraline (acute and chronically doses) was evaluated on lipid peroxidation levels and antioxidant enzyme activities in plasma and brain tissues of (10, 40, 80 mg/kg) sertraline treated Wistar albino rats (n=48). Lipid peroxidation levels (MDA) of plasma and brain tissue increased in all acute and chronic sertraline treated rats (p < 0.05). According to results of present study superoxide dismutase (SOD) levels of brain tissue decreased while plasma levels increased (p < 0.05) as compared with vehicle group. Catalase (CAT) levels of plasma and brain tissue and paraoxonase (PON) levels of plasma decreased (p < 0.05) as compared with vehicle group. Based on the data, it can be concluded that high dose sertraline administration enhances oxidative stress. Therefore, dose adjustment in depression patients seems significant as it may help prevention of further prognosis of the diseases.

Is there a role of free oxygen radicals in primary male osteoporosis?

OBJECTIVE: There is not enough evidence about the relationship between free radicals and male osteoporosis. In this study we investigated the role of free oxygen radicals and antioxidants on male osteoporosis in 31 male patients with primary osteoporosis and 21 subjects as controls. METHODS: Bone mineral densities (BMD) of the lumbar and femoral neck region were evaluated using dual energy X-ray absorbsiometry. Serum malondialdehyde (MDA) and nitric oxide (NO) levels and superoxide dismutase (SOD) and glutathione peroxidase (GPx) activities were measured by analytical methods. In addition, serum osteocalcine and C telopeptide levels were determined to evaluate bone turnover MDA and NO levels and SOD activity were significantly increased (p < 0.05) in osteoporotic males. RESULTS: There was a negative correlation between SOD and lumbar BMD levels (r= -0.328; p = 0.021). The same trend was observed between NO and lumbar BMD (r = -0.473; p = 0.001) and femoral neck BMD values (r = -0.540; p = 0.000). There was no significant correlation between free radical levels and bone turnover markers. CONCLUSION: The data indicate an increase in free oxygen radical levels. As a result, antioxidant defenses would compromise in primary male osteoporotic patients. Therefore, it may be suggested that oxidative stress plays an important role in the pathophysiology of primary male osteoporosis.

[The effects of the short-term regular exercise-diet program on lipid profile in sedentary subjects]. / Sedanter bireylerde kisa dönem düzenli egzersiz-diyet programinin lipid profili üzerindeki etkileri.

OBJECTIVE: Regular aerobic exercise leads to changes in plasma lipids, lipoprotein and apoprotein levels. The aim of this study was to examine the training effects of the intervention program consisted of regular exercise and low fat diet on plasma lipid profile. METHODS: The effects of the four weeks intervention programme which consisted of walking and dietary restriction on lipid profile in sedentary subjects were investigated. Subjects, who had dyslipidemia or obesity, were instructed to walk (consecutive 60 minutes, one times daily) and to consume no more than 20% total fat and 300 mg/d of cholesterol for four weeks. At the end of fourth week, 41 subjects who had implemented exercise-diet programme, were assigned to study (intervention) group; 21 subjects who had remained sedentary, nondieting, were included into the control group. Total-C, triglycerides, LDL-C, HDL-C, Lp (a), apo A1 and apo B100 were measured in fasting blood samples before and after 4 weeks of intervention programme. RESULTS: At the end of four weeks, subjects in the exercise-diet group, as compared with the control group, showed a significant reduction in body weight (respectively 1.67 +/- 2.36 kg versus -0.21 +/- 1.36 kg, p = 0.001), total cholesterol (35 +/- 37 mg/dl vs -20 +/- 25 mg/dl, p < 0.001), triglycerides (30 +/- 68 mg/dl vs -10 +/- 52 mg/dl, p = 0.024) and LDL-C (29 +/- 41 mg/dl vs -18 +/- 25 mg/dl, p < 0.001) levels. However, at the end of programme, in the exercise-diet group, as compared with the control group, the changes in HDL-C (respectively -0.85 +/- 7.30 mg/dl vs 1.05 +/- 5.64 mg/dl, p = 0.302), Lp (a) (1.59 +/- 3.06 mg/dl vs -0.09 +/- 3.96 mg/dl, p = 0.069), apo A1 (0.61 +/- 22.69 mg/dl vs -0.66 +/- 17.27 mg/dl, p = 0.822) and apo B100 (5.41 +/- 19.33 mg/dl vs -4.00 +/- 20.51 mg/dl, p = 0.080) were not significant. CONCLUSION: The data of this study demonstrate that the four weeks programme based on regular daily aerobic exercise and low fat diet is capable of decreasing total cholesterol, triglycerides and LDL-C levels and that this short-term intervention is insufficient in increasing HDL-C, in decreasing Lp (a) and improving apoprotein levels.