The aim of this study was to evaluate the relationship among oxidative DNA damage, density of Helicobacter pylori and the relevance of cagA, vacA and iceA genotypes of H. pylori. Gastric epithelial cells were isolated from 24 uninfected patients, 42 H. pylori infected patients with gastritis, and 61 patients with gastric cancer. Oxidative DNA damage was analyzed by the Comet assay, the density of H. pylori was measured by real-time polymerase chain reaction (PCR), and allelic variants of cagA, vacA and iceA were identified using the PCR. Infected patients by Helicobacter pylori cagA(+), vacAs1 m1 and iceA1 genotype showed higher levels of oxidative DNA damage than infected patients with H. pylori cagA(-), vacAs2 m2 and iceA2 genotypes and uninfected patients. Density of H. pylori did not influence oxidative DNA damage. Our results indicate that H. pylori genotype is more relevant than density for oxidative DNA damage.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1007/s10620-007-9850-0 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
A Prototype of Ultrasensitive Time-Resolved Fluoroimmunoassay with Enhanced Fluorescence System for the Trace Determination of Urinary 8-Hydroxy-2`-Deoxyguanosine, the DNA Oxidative Stress Biomarker.
J Fluoresc
January 2025
Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Phayathai Road Pathumwan, 10330, Thailand.
This study presents a new highly sensitive and specific time-resolved fluoroimmunoassay (TRFIA) for the measurement of trace amounts of the urinary 8-hydroxy-2`-deoxyguanosine (8-OHdG) which is a biomarker for oxidative stress on DNA. The assay relied on a competitive binding approach and a mouse monoclonal antibody which recognized 8-OHdG with high specificity. In this assay, 8-OHdG conjugated with bovine serum albumin protein (8-OHdG-BSA) was employed as a solid phase antigen.
View Article and Find Full Text PDFPolystyrene nanoplastics promote colitis-associated cancer by disrupting lipid metabolism and inducing DNA damage.
Environ Int
January 2025
Department of Gastrointestinal Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China. Electronic address:
Nanoplastics (NPs) have attracted widespread attention owing to their presence in the body. Recent studies highlighted the detrimental effects of NPs on the digestive tract. However, no studies have reported an association between NPs exposure and colitis-associated cancer (CAC).
View Article and Find Full Text PDFStudy on the developmental, behavioral toxicity, and toxicological mechanism of the antidepressant drug venlafaxine and its active metabolites in zebrafish.
Environ Toxicol Chem
January 2025
School of Environment and Energy, South China University of Technology, Guangzhou, PR China.
As a representative agent of bicyclic antidepressants, venlafaxine (VEN) has become widely used worldwide and is frequently detected in surface waters with concentrations ranging from ng/L to µg/L. To evaluate the toxicological effects of such medications on aquatic species, studies on environmentally relevant concentrations are essential. Zebrafish were used as a model organism to assess growth and development in larvae and examine tissue accumulation, oxidative stress, and DNA methylation in adults.
View Article and Find Full Text PDFA Case-Control Study of the Association Between Gene Polymorphisms (rs1695 and rs1138272) and the Susceptibility to Male Infertility in the Moroccan Population.
Genet Test Mol Biomarkers
January 2025
Laboratory of Genomics and Human Genetics, 1, Place Louis Pasteur, Institut Pasteur du Maroc, Casablanca, Morocco.
Infertility affects 10-15% of couples worldwide, with male factors accounting for half of cases. Environmental, behavioral, and genetic problems contribute to spermatogenic failure in 30% of idiopathic male infertility cases. Other factors, such as oxidative stress (OS), cause impaired spermatogenesis, abnormal sperm morphology, and reduced motility, eventually triggering male infertility.
View Article and Find Full Text PDFERK1/2 gene expression and hypomethylation of Alu and LINE1 elements in patients with type 2 diabetes with and without cataract: Impact of hyperglycemia-induced oxidative stress.
J Diabetes Investig
January 2025
Department of Medical Sciences, Shahid Beheshti University, Tehran, Iran.
Aims: This study aimed to delineate the effect of hyperglycemia on the Alu/LINE-1 hypomethylation and in ERK1/2 genes expression in type 2 diabetes with and without cataract.
Methods: This study included 58 diabetic patients without cataracts, 50 diabetic patients with cataracts, and 36 healthy controls. After DNA extraction and bisulfite treatment, LINE-1 and Alu methylation levels were assessed using Real-time MSP.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!