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BACKGROUND Asymmetric dimethylarginine (ADMA) is an endogenous inhibitor of nitric oxide synthase (NOS). Plasma levels of ADMA are elevated in individuals with hypercholesterolemia or atherosclerosis. We postulated that reduced degradation of ADMA may play a role in the accumulation of ADMA in these individuals. Accordingly, we studied the effects of(More)
BACKGROUND An endogenous inhibitor of nitric oxide synthase, asymmetric dimethylarginine (ADMA), is elevated in patients with type 2 diabetes mellitus (DM). This study explored the mechanisms by which ADMA becomes elevated in DM. METHODS AND RESULTS Male Sprague-Dawley rats were fed normal chow or high-fat diet (n=5 in each) with moderate streptozotocin(More)
BACKGROUND NO is a major regulator of cardiovascular physiology that reduces vascular and cardiac contractility. Accumulating evidence indicates that endogenous inhibitors may regulate NOS. The NOS inhibitors asymmetric dimethylarginine (ADMA) and N-monomethylarginine are metabolized by the enzyme dimethylarginine dimethylaminohydrolase (DDAH). This study(More)
The p53 tumor suppressor gene product is a transcription factor involved in cell-cycle regulation, apoptosis, and DNA repair. We and others have shown that p53 is required for efficient nucleotide excision repair (NER) of UV-induced DNA lesions. p53-deficient cells are defective in the repair of UV photoproducts in genomic DNA but proficient for(More)
The tumor suppressor protein p53 functions in many cellular responses to UV-induced DNA damage, including activating the global nucleotide excision repair (NER) pathway. A potential mechanism for the effect on NER is through the ability of p53 to transcriptionally regulate genes that are directly involved in NER. DDB2 is one such gene that is regulated by(More)
Histone deacetylase (HDAC) inhibitors such as the phenyl hydroxamic acid PCI-24781 have emerged recently as a class of therapeutic agents for the treatment of cancer. Recent data showing synergy of HDAC inhibitors with ionizing radiation and other DNA-damaging agents have suggested that HDAC inhibitors may act, in part, by inhibiting DNA repair. Here we(More)
In response to a variety of types of DNA damage, the p53 tumor suppressor gene product is activated and regulates a number of downstream cellular processes such as cell cycle arrest, apoptosis and DNA repair. Recent discoveries concerning the regulation of DNA repair processes by p53, such as nucleotide excision repair (NER) and base excision repair (BER)(More)
The p53 tumor suppressor gene is a transcriptional activator involved in cell cycle regulation, apoptosis, and DNA repair. We have shown that p53 is required for efficient nucleotide excision repair of UV-induced DNA photoproducts from global genomic DNA but has no effect on transcription-coupled repair. In order to evaluate whether p53 influences repair(More)
Myc, a pleiotropic transcription factor that is deregulated and/or overexpressed in most human cancers, instructs multiple extracellular programs that are required to sustain the complex microenvironment needed for tumor maintenance, including remodeling of tumor stroma, angiogenesis, and inflammation. We previously showed in a model of pancreatic β-cell(More)
A group of asthmatics treated in a clinic setting were compared to a group treated by private allergists. Statistical differences were found regarding family income, racial distribution, family structure, educational level, reading habits, management of acute asthma attacks, housing, living space, school absences and hospital admissions.