PARP1-DNMT1-CTCF complex and the apoptotic-induced factor mRNA expressions in workers occupationally exposed to benzene

• Published in: Environmental science and pollution research international 2020-06, Vol.27 (18), p.22648-22657
• Main Authors: Habieb, Mona Salah El-din, Younis, Faten Ezzelarab, Safan, Manal, Allam, Heba Khodary
• Format: Article
• Language: English
• Subjects: Adenosine diphosphate; air; Apoptosis; Apoptosis-inducing factor; Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Benzene; Damage; Deoxyribonucleic acid; DNA; DNA damage; DNA methylation; DNA repair; DNMT1 protein; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Environmental science; Erythropoiesis; Exposure; Gene expression; glycosidases; Hematology; Hematopoietic system; Hydrocarbons; Methylation; Occupational exposure; Occupational hazards; Occupational health; Pathogenesis; pollution; Poly(ADP-ribose) polymerase; Polymerase chain reaction; Repair; Research Article; reverse transcriptase polymerase chain reaction; Reverse transcription; Ribose; Waste Water Technology; Water Management; Water Pollution Control; working conditions
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-020-08614-6

Exposure to benzene is a common occupational hazard as well as a hematopoietic system intoxicant, but the entire picture of its molecular pathogenesis is still hazy. Its leukemogenic effect could be attributed to DNA damage, decreased repair capacity, altered methylation patterns, and defective apoptosis. Poly ADP-ribose polymerase1, DNA methyltransferase1, and CCCTC-binding factor (PARP1-DNMT1-CTCF) complex play an essential role in methylation maintenance and DNA damage repair response. This study aimed to assess the expression of PARP1, PAR glycohydrolases (PARG), DNMT1, CTCF, and apoptosis-inducing factor (AIF) in subjects occupationally exposed to benzene. A total of 200 subjects were enrolled in this study: 100 workers occupationally exposed to benzene (painters and decorators) and 100 unexposed office workers. Occupational exposure data were obtained. The biochemical and hematological evaluations were done. Quantitative reverse transcription polymerase chain reaction ( RT-PCR) was used to assess mRNA expression of PARP1, PARG, DNMT1, CTCF, and AIF. Both biochemical and hematological parameters were within normal limits; workplace benzene air concentration was significantly higher in exposed workers than the levels among controls ( P