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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Role of liver fatty acid binding protein in fatty liver cell culture model

Chen, Yufei 05 April 2012 (has links)
Liver fatty acid binding protein has been reported to possess antioxidant properties in the liver. The aim of this study was to investigate the effect of this protein in a nonalcoholic fatty liver disease (NAFLD) cell culture model. Rat hepatoma cells were treated with an oleate:palmitate (2:1) mixture for either 1 and 2 days, or further treated with 500 µM clofibrate to induce L-FABP expression. Intracellular lipid accumulation was quantitated by Nile Red. Lipotoxicity was determined using the WST-1 assay. Dichlorofluorescein (DCF) was utilized to assess intracellular reactive oxidative species (ROS) level. Measurement of lipotoxicity showed statistical decreases in cell viability as lipid concentrations increased in a dose-dependent manner. NAFLD cell cultures showed characteristic cellular damage from increased ROS levels in fatty acid treated cells. All groups treated with clofibrate showed statistically increased intracellular L-FABP levels and reduced ROS levels. The results lead to the conclusion that clofibrate induces L-FABP expression and in this manner suppresses hepatocellular ROS generation.
2

Role of liver fatty acid binding protein in fatty liver cell culture model

Chen, Yufei 05 April 2012 (has links)
Liver fatty acid binding protein has been reported to possess antioxidant properties in the liver. The aim of this study was to investigate the effect of this protein in a nonalcoholic fatty liver disease (NAFLD) cell culture model. Rat hepatoma cells were treated with an oleate:palmitate (2:1) mixture for either 1 and 2 days, or further treated with 500 µM clofibrate to induce L-FABP expression. Intracellular lipid accumulation was quantitated by Nile Red. Lipotoxicity was determined using the WST-1 assay. Dichlorofluorescein (DCF) was utilized to assess intracellular reactive oxidative species (ROS) level. Measurement of lipotoxicity showed statistical decreases in cell viability as lipid concentrations increased in a dose-dependent manner. NAFLD cell cultures showed characteristic cellular damage from increased ROS levels in fatty acid treated cells. All groups treated with clofibrate showed statistically increased intracellular L-FABP levels and reduced ROS levels. The results lead to the conclusion that clofibrate induces L-FABP expression and in this manner suppresses hepatocellular ROS generation.
3

Antioxidants and chronic pancreatitis

Shah, Nehal January 2017 (has links)
Chronic pancreatitis (CP) is characterised by chronic, frequent, disabling abdominal pain. It often leads to exocrine and endocrine insufficiency resulting in malabsorption and diabetes mellitus respectively. The incidence of CP is 5-10 per 100,000 population worldwide and is on the rise in UK. Alcohol (70%) is the commonest aetiologic cause, idiopathic (20%) and others (10%) being second and third respectively. There are various medical and surgical treatment options available depending on clinical characteristics and the stage of disease. In spite of wide spectrum of therapeutic options, pain control still remains a challenging problem to the clinicians. Surgical treatments for chronic pancreatitis, broadly classified into resectional and drainage procedures, may offer relief of symptoms. These surgeries are associated with severe morbidity and high mortality. In addition, our comprehensive review of surgery in chronic pancreatitis demonstrated lack of criteria for baseline assessment of patients with CP; resulting in lack of standardization, variation in indication and comparability in published literature on surgical treatment of chronic pancreatitis. These factors have collectively forced the medical fraternity to look for other non or minimally invasive options. Oxidative stress and deficiency of anti-oxidants have long been implicated in pathogenesis of CP. Our review of literature on oxidative stress and antioxidants has highlighted the shortcomings and inadequacies from the previously published reports. These reports were underpowered and not all included patients had chronic pancreatitis. This in turn led us to propose a well designed randomised, double blind, placebo controlled trial of antioxidant therapy in CP. Considering the loss of time and productivity, it is necessary to undertake Qol as an outcome measure in any intervention related to CP. Our study assessed the suitability and feasibility of validated quality of life indices in patients with painful chronic pancreatitis. After correction for disease duration, the outcome of contemporary quality of life assessments showed that patients with CP taking Antox had better scores than controls. Cytokines, a group of proteins and glycoproteins that act in regulation of immunity, inflammation and haematopoiesis are implicated in oxidative stress related pathogenesis of chronic pancreatitis. They are broadly classed as pro-inflammatory and anti-inflammatory. There have been few experimental studies suggesting that antioxidants ameliorate cytokine response in chronic pancreatitis. However our study has failed to demonstrate a significant effect on cytokine levels after six months of antioxidant therapy. Similarly, on the clinical front, a randomised, double blind placebo controlled study (referred to as ANTICIPATE TRIAL) has shown no benefit of antioxidant therapy in painful chronic pancreatitis, irrespective of age, gender, aetiology or operative intervention. So we are afraid to say that until we discover any novel treatment in management of intractable painful chronic pancreatitis, surgery and interventional endoscopy might be the only viable options.

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