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Articles 1 - 9 of 9
Full-Text Articles in Food Science
Biotransformation Of Resveratrol And Its Implications In Biological Activities In The Colon, Fang Li
Biotransformation Of Resveratrol And Its Implications In Biological Activities In The Colon, Fang Li
Doctoral Dissertations
Resveratrol (RES) is a natural polyphenol compound with a wide range of health-promoting activities, including protective effects against colon cancer and renal disease. However, the premise of these benefits has been dampened since RES shows a poor oral bioavailability due to its rapid and extensive biotransformation after oral consumption. The paradox (low bioavailability but high bioactivity) warrants further investigations to determine the contribution of RES metabolites to the health benefits associated with RES. We identified 11 metabolites of RES in mice with high-resolution HPLC-MS/MS, then quantified two major metabolites - dihydro-resveratrol (DHR) and lunularin (LUN). To further understand the chemopreventative …
Combination Regimens Using Dietary Components For The Chemoprevention Of Colorectal Cancer And Inflammation, Christina Dimarco-Crook
Combination Regimens Using Dietary Components For The Chemoprevention Of Colorectal Cancer And Inflammation, Christina Dimarco-Crook
Doctoral Dissertations
ABSTRACT COMBINATION REGIMENS USING DIETARY COMPONENTS FOR THE CHEMOPREVENTION OF COLORECTAL CANCER AND INFLAMMATION September 2018 CHRISTINA DIMARCO-CROOK, B.S., IMMACULATA UNIVERSITY M.S., DREXEL UNIVERSITY Ph.D., UNIVERSITY OF MASSACHUSETTS AMHERST Directed by: Professor Hang Xiao Dietary components have been found to effectively modulate multiple deregulated signaling pathways associated with the initiation and progression of carcinogenesis and inflammation in cellular and animal models. However, clinical studies have shown mixed results when examining the efficacy of individual dietary components, perhaps suggestive of the synergism that exists between multiple components within a particular food and the diet as a whole. Additional research is needed …
Applications Of Drosophila Melanogaster In Food Science Research, Phoebe Beverly Chen
Applications Of Drosophila Melanogaster In Food Science Research, Phoebe Beverly Chen
Doctoral Dissertations
Drosophila melanogaster is a versatile model organism that provides several unique features, such as highly conserved disease pathways with humans as well as availability of environmental and genetic manipulations. Meanwhile, there is increasing interest in the potential role of bioactive food components, epigallocatechin gallate (EGCG) and conjugated linoleic acid (CLA), in metabolic research. However, there is limited knowledge on the sex-dependent effects of EGCG and CLA on energy metabolism. In this study, Drosophila melanogaster was used to investigate the sex-dependent effects of EGCG and CLA with respect to energy metabolism, including body fat, locomotion, and their key metabolic regulators. We …
Modulation Of Hepatic Lipid Metabolism By Insecticides And Food Bioactives, Jason Yang
Modulation Of Hepatic Lipid Metabolism By Insecticides And Food Bioactives, Jason Yang
Doctoral Dissertations
Recent studies reported the positive association between exposure to insecticides and increased risks of obesity and type 2 diabetes, which is closely associated with non- alcoholic fatty liver disease (NAFLD). However, the effect of insecticide exposure on NAFLD remains unknown. Therefore, this project investigated the roles of insecticide exposure in the development of NAFLD using HepG2 hepatocytes. First, 12 insecticides were tested for their effects on triglycerides (TG) accumulation and interactions with palmitic acid (PA), which induces steatosis. Among tested insecticides, permethrin and ivermectin significantly altered TG accumulation and interacted with PA. Further mechanistic studies showed that permethrin promoted lipogenesis …
Interaction Between Dietary Components And Gut Microbiota And Its Implication In Bioactivities And Metabolism In Colon, Min Gu
Doctoral Dissertations
The microbial cells that colonize the human body, including mucosal and skin environments, are at least as abundant as our somatic cells and certainly contain far more genes than our human genome. Gut microbiota dysbiosis is associated with the onset and progress of several diseases, like diabetes, obesity, inflammatory bowel disease. One of the environmental factor-diet intervention can modulate the compositions of gut microbiota, which in turn may contribute to altered health outcomes such as changes in the risks of chronic diseases. Orange peel has been a traditional herb in China, and some of its compounds has shown health benefits. …
In Situ And Real-Time Monitoring And Characterization Of Pesticide Residues On And In Fresh Produce Using Sers, Tianxi Yang
In Situ And Real-Time Monitoring And Characterization Of Pesticide Residues On And In Fresh Produce Using Sers, Tianxi Yang
Doctoral Dissertations
Understanding of the behavior and fate of pesticides in fresh produce is of great significance for effectively applying pesticides and minimizing pesticide residues in food. There is lack, however, of an effective method that can monitor and characterize pesticide behaviors including penetration, persistence and translocation. Herein, we developed a novel method for real-time and in situ monitoring of pesticide behaviors in fresh produce based on surface-enhanced Raman scattering (SERS) mapping method. Taking advantage of penetrative gold nanoparticles as probes to enhance the internalized pesticide signals, the internal signals from pesticides were successfully obtained in situ. We found that systemic pesticides …
Interaction Of Titanium Dioxide Nanoparticles (Nps) With Food Components And Mechanistic Studies Of Adverse Effects Induced By Titanium Dioxide Nps, Xiaoqiong Cao
Doctoral Dissertations
Many food products contain engineered inorganic nanoparticles (NPs), such as titanium dioxide (TiO2) NPs as a part of food additive, due to both unintentional and intentional additions. There has been increasing concern about the health risks associated with foodborne inorganic NPs. However, the detailed understanding of the biological fate and potential adverse effects of foodborne TiO2 NPs is not available despite a limited number of published toxicity studies on TiO2 NPs. The purpose of this thesis was to characterize the interactions of TiO2 NPs and food components including dietary flavonoids and dietary proteins, …
A Living Model For Obesity And Aging Research: Caenorhabditis Elegans, Peiyi Shen
A Living Model For Obesity And Aging Research: Caenorhabditis Elegans, Peiyi Shen
Doctoral Dissertations
Caenorhabditis elegans (C. elegans) is a free-living nematode that has been extensively utilized as an animal model for the research involving aging and neurodegenerative diseases, like Alzheimer and Parkinson, etc. Compared with the traditional animal models, this nematode possesses many benefits, such as small body size, short lifespan, complete sequenced genome and more than 65% of the genes associated with human diseases. All these characteristics enable this organism to be an ideal living system for obesity and aging studies. Piceatannol is a natural stilbene with many beneficial effects, such as anti-oxidative, anti-inflammatory, anti-atherogenic activities, however, its role on …
The Heat Shock Cognate 70 Protein (Hsc70) Is A Novel Target For Nobiletin In Colon Cancer Cells, Zili Gao
The Heat Shock Cognate 70 Protein (Hsc70) Is A Novel Target For Nobiletin In Colon Cancer Cells, Zili Gao
Doctoral Dissertations
Nobiletin (NBT) is a unique flavonoid mainly found in citrus fruits, and has been reported to inhibit colon carcinogenesis in multiple rodent models. However, the direct molecular targets of NBT are unknown. Heat shock cognate 70 protein (HSC70) contributes to cancer cell survival and resistance to chemotherapies, thereby the inhibition of HSC70 is a promising strategy in cancer chemoprevention. Using affinity chromatography, proteomics analysis and computer modeling, we demonstrated that NBT bound to HSC70 at its ATP-binding site and specifically inhibited its ATPase activity. The association between HSC70 and HSP90 is critical for the stability of their client proteins, which …