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Pterostilbene attenuates myocardial ischemia-reperfusion injury via the phosphatidylinositol 3'-kinase-protein kinase B signaling pathway.

The current study aimed to evaluate the cardioprotective effects of pterostilbene (PTB) on myocardial ischemia-reperfusion (I/R) injury in rats and identify its possible underlying mechanisms of action. A rat I/R model was established by ligating the left anterior descending coronary artery for 30 min and releasing the ligature to induce reperfusion for 120 min. Serum creatine kinase-MB (CK-MB) and lactate dehydrogenase (LDH) levels were measured using CK-MB and LDH assay kits and myeloperoxidase (MPO) activity in the myocardium was evaluated using an MPO assay kit. Tumor necrosis factor-α, interleukin (IL)-6 and IL-8 levels were assayed using ELISA kits. Cardiomyocyte apoptosis was measured using terminal deoxynucleotidyl transferase dUTP nick end labeling staining. Levels of protein kinase B (Akt) and phosphorylated Akt (p-Akt) were measured using western blotting. The results demonstrated that treatment with PTB significantly reduced cardiomyocyte apoptosis, significantly increased Bcl-2 and p-Akt levels and decreased Bax expression in the hearts of rats subjected to I/R injury. However, the protective effects induced by PTB were attenuated by LY294002, which inhibits Akt activation. The results of the current study suggest that PTB treatment may reduce the I/R injury-induced apoptosis of cardiomyocytes, which is mediated by the phosphoinositide 3-kinase/Akt signaling pathway.

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Diagnostic and clinical significance of the titin fragment in urine of Duchenne muscular dystrophy patients.

Duchenne muscular dystrophy (DMD) is a fatal progressive muscle wasting disease of childhood. Titin in sarcomere is digested by calcium dependent protease. To explore muscle damage in DMD, the urinary concentrations of the N-terminal fragment of titin were determined using a newly developed enzyme linked immune sorbent assay kit. The urinary titin concentrations were normalized to creatinine (Cr). A total of 145 urine samples were obtained at a single Japanese hospital from 113 DMD patients aged 3-29years. Normalized urinary titin concentration was 965.8±1011.9 (Mean±SD) pmol/mg Cr in patients with DMD. This was nearly 700-fold higher than healthy children (1.4±0.8pmol/mg Cr). The concentration was significantly higher in DMD than in BMD patients who had significantly higher urinary titin than normal. Urinary titin in DMD patients tended to decrease with age. The median concentration of urinary titin in the youngest (aged 3-7years) and oldest (aged ≥16years) groups was 1468.3 and 411.3pmol/mg Cr, respectively, with significant difference. Urinary concentration of titin correlated significantly with serum creatine kinase concentration, the best-known biomarker of DMD. The N-terminal fragment of titin in urine has potential as a diagnostic and clinical biomarker for DMD.

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Cloning, Expression and Purification ofCreatinase.

ATCC12633 can produce creatinase. It is a microbial enzyme which degrades creatinine in bacteria and provides source of carbon and nitrogen. Also, this enzyme is used in the enzymatic measurement of creatinine concentration for diagnosis of renal and muscles functions and diseases. Our purpose was recombinant production of creatinase for using in clinical measurement of serum or urine creatinine.

2447 related Products with: Cloning, Expression and Purification ofCreatinase.

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[Grain-Moxibustion may Protect Myocardium by Reducing Oxidative Stress in Doxorubicin-induced Cardiomyopathy Rats].

To observe the effectiveness of grain-moxibustion in resisting oxidative stress in doxorubicin (DOX)-induced cardiomyopathy rats.

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Cardioprotective Effects of Malvidin Against Isoproterenol-Induced Myocardial Infarction in Rats: A Mechanistic Study.

BACKGROUND Malvidin (alvidin-3-glucoside) is a polyphenol that belongs to the class of natural anthocyanin, which is abundantly found in red wines, colored fruits, and the skin of red grapes. Therefore, the current investigation was intended to evaluate the effect of malvidin against myocardial infarction induced by isoproterenol in the rats. MATERIAL AND METHODS The cardioprotective effects was assessed by determining the effect of malvidin on the activities of endogenous antioxidants - catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GSH) - and on the levels of lipid peroxidation and serum marker enzymes. The serum levels of IL-6 and TNF-α were also determined using an enzyme-linked immunosorbent assay (ELISA) kit. RESULTS The present study demonstrated a significant cardioprotective effect of malvidin by restoring the defensive activities of endogenous antioxidants - catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GSH) - and by reducing the levels of lipid peroxidation and serum marker enzymes lactate dehydrogenase (LD) and creatine kinase (CK). Malvidin significantly ameliorated the histopathological changes and impaired mitochondria in the cardiac necrosis stimulated with isoproterenol. Additionally, the results also demonstrated that nuclear translocation of Nrf-2 and subsequent HO-1 expression might be associated with nuclear factor kappa B (NF-κB) pathway activation. CONCLUSIONS Our findings suggest that malvidin exerts cardioprotective effects that might be due to possible strong antioxidant and anti-inflammatory activities. Therefore, this study provides the basis for the development of malvidin as a safe and effective treatment of myocardial infarction.

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YiQiFuMai Powder Injection attenuates coronary artery ligation-induced myocardial remodeling and heart failure through modulating MAPKs signaling pathway.

YiQiFuMai Powder Injection (YQFM), a traditional Chinese medicine prescription re-developed based on Sheng-Mai-San, is a classical and traditional therapeutic for clinical heart failure (HF) and angina. However, its potential mechanism against HF remains unclear.

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[Noninvasive diagnostic and predictive value in renal transplant recipients with acute rejection by measurement of urine Fractalkine].

To investigate the relationship between early-stage renal acute rejection(AR) and the level of Fractalkine in urine, explore the diagnostic and noninvasive monitoring value in early stage after transplantation by measurement of urine Fractalkine.Urine samples were examined from renal transplant patients between January 2006 and October 2009. A total of 155 patients were enrolled, including 49 with biopsy-proved AR, 58 patients with stable renal function and no abnormal histological findings, 10 patients with subclinical rejection in protocol biopsy, 9 patients with biopsy-proven acute tubular necrosis and 29 patients with biopsy-proven chronic allograft nephropathy. Additionally, urine samples were also collected from 40 healthy controls. Fractalkine was measured in urine samples using a commercial human Fractalkine enzyme-linked immunosorbent assay (ELISA) kit. Immunohistochemistry for Fractalkine expression was performed on biopsies from renal transplant patients with AR and non-AR.Forty-nine patients with AR excreted urinary Fractalkine at a significantly higher level than levels in patients with stable renal function and healthy controls[(429.1±56.1)vs (94.6±8.4), (84.5±8.9)ng/mmol creatine, both<0.001]. Patients with AR excreted urinary Fractalkine at a significantly higher level than levels in patients with acute tubular necrosis and chronic allograft nephropathy[(429.1±56.1)vs(133.0±9.8), (183.0±18.9)ng/mmol creatine, both<0.001]. Receiver operating characteristic(ROC)curve was constructed to determine the discriminatory power of Fractalkine levels for diagnosis of AR. The area under ROC curve was 0.920(95%: 0.875-0.969,<0.001), which showed that Fractalkine was a suitable marker for the diagnosis of AR. At a cut-off point of 157.5 ng/mmol creatinine, the sensitivity was 83.7% and the specificity was 84.5% (<0.001). The dynamic level of urinary Fractalkine in AR patients within 3 weeks after transplantation fluctuated above 300 ng/mmol creatine, which is remarkably higher than patients with stable renal function (below 200 ng/mmol creatinine).As a noninvasive monitoring method, Fractalkine in urine may be a new approach for detection of AR as well as useful to predict response to antirejection therapy. It has good sensitivity and specificity. Besides, measurement of Fractalkine in urine is a simple, inexpensive method for the routine clinical monitoring after kidney transplantation.

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Apoptosis kinetics at reperfusion period in patients with acute ST-Segment Elevation Myocardial Infarction undergoing primary percutaneous coronary intervention and treated with thrombolytic therapy.

To evaluate the kinetics of cardiomyocyte apoptosis in patients undergoing primary percutaneous coronary intervention and thrombolytic therapy in order to elucidate the dark side of reperfusion injury.

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A reference interval study for common biochemical analytes in Eastern Turkey: a comparison of a reference population with laboratory data mining.

The aim of this study was to define the reference intervals (RIs) in a Turkish population living in Northeast Turkey (Erzurum) for 34 analytes using direct and indirect methods. In the present study, the regional RIs obtained were compared with other RI studies, primarily the nationwide study performed in Turkey.

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Cardioprotection provided by Echinatin against ischemia/reperfusion in isolated rat hearts.

This study evaluated the protective effect of Echinatin against myocardial ischemia/reperfusion (I/R) injury in rats.

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