Nicotine has been reported to cause acute toxicity and to present long-term risks, such as chromosomal damage and genetic instability. The genotoxicity of nicotine may be mediated partly by an oxidative mechanism. We have evaluated the effects of the antioxidant vitamin C on nicotine-induced genotoxicity in mice. The comet assay and the micronucleus test were used to assess the effects of nicotine (15mg/kg) at different exposure times (2, 4, and 24h in the comet assay; 24h in the micronucleus test). Pretreatment with vitamin C 24h before nicotine exposure strongly protected mice against nicotine-induced DNA damage.
Download full-text PDF |
Source |
---|---|
http://dx.doi.org/10.1016/j.mrgentox.2012.01.008 | DOI Listing |
Andrology
January 2025
Department of Surgery, Division of Urology, Human Reproduction Section, São Paulo Federal University, São Paulo, Brazil.
Background: Varicocele is associated with a progressive decrease in male fertile potential, but it has yet to be determined if the duration of varicocele is associated with altered sperm functional quality.
Objectives: This experimental study investigated the time-dependent effects of varicocele on spermatogenesis, sperm parameters, and sperm functional traits.
Materials And Methods: Thirty-five mature male Wistar rats (200 ± 25 g) were included.
Turk J Pharm Sci
January 2025
Yeditepe University Faculty of Pharmacy, Department of Pharmaceutical Toxicology, İstanbul, Türkiye.
Objectives: The chemotherapeutic drug doxorubicin (DOX) affects not only cancer cells but also healthy cells in an undesirable manner. The purpose of this study was to investigate the protective roles of rosmarinic acid (RA) and Epigallocatechin gallate (EGCG) alone and in combination against DOX-induced oxidative stress, cytotoxicity, and genotoxicity in healthy cells. In addition, this study evaluated the expression of the mammalian target of rapamycin (mTOR) protein in the Chinese hamster ovary cell line (CHO-K1).
View Article and Find Full Text PDFExp Hematol Oncol
January 2025
Cancer Science Institute of Singapore, National University of Singapore, Singapore, Singapore.
Background: Radiotherapy is the primary treatment modality for most head and neck cancers (HNCs). Despite the addition of chemotherapy to radiotherapy to enhance its tumoricidal effects, almost a third of HNC patients suffer from locoregional relapses. Salvage therapy options for such recurrences are limited and often suboptimal, partly owing to divergent tumor and microenvironmental factors underpinning radioresistance.
View Article and Find Full Text PDFPhytomedicine
December 2024
Beijing Key Laboratory of Antimicrobial Agents, Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100073, China. Electronic address:
Background: Adherence of Helicobacter pylori to the surface of the gastric mucosa is the initial and crucial step for its survival and colonization in the harsh conditions of the stomach. We had previously demonstrated that daphnetin has anti-adhesion effect.
Purpose: This study aims to explore the mechanisms of daphnetin to reduce H.
J Transl Med
January 2025
Department of Radiation Oncology, The Second Affiliated Hospital of Dalian Medical University, No. 467 of Zhongshan Road, Shahekou District, Dalian, 116023, China.
Objective: Cervical cancer is a common malignancy among women, and radiotherapy remains a primary treatment modality across all disease stages. However, resistance to radiotherapy frequently results in treatment failure, highlighting the need to identify novel therapeutic targets to improve clinical outcomes.
Methods: The expression of molecule interacting with CasL-2 (MICAL2) was confirmed in cervical cancer tissues and cell lines through western blotting (WB) and immunohistochemistry (IHC).
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!