RT Journal Article SR Electronic T1 Organochlorine pesticides, oxidative stress biomarkers, and leukemia: a case-control study JF Journal of Investigative Medicine JO J Investig Med FD BMJ Publishing Group Ltd SP 1736 OP 1745 DO 10.1136/jim-2021-002289 VO 70 IS 8 A1 Arash Rafeeinia A1 Gholamreza Asadikaram A1 Mehrnaz Karimi-Darabi A1 Moslem Abolhassani A1 Mojtaba Abbasi-Jorjandi A1 Vahid Moazed YR 2022 UL http://jim.bmj.com/content/70/8/1736.abstract AB Exposure to pesticides has been linked to an elevated risk of leukemia. The present research aimed to evaluate the relationship between organochlorine (OC) pesticides and biomarkers of oxidative stress in patients with leukemia. This work was conducted on 109 patients with leukemia and 109 healthy controls. The serum concentrations of seven derivatives of OCs including alpha-hexachlorocyclohexane (HCH), beta-HCH, gamma-HCH, 2,4-dichlorodiphenyltrichloroethane (DDT), 4,4-DDT, 2,4-dichlorodiphenyldichloroethylene (DDE), and 4,4-DDE along with acetylcholinesterase (AChE), glutathione peroxidase (GPx), superoxide dismutase (SOD), paraoxonase-1 (PON1), and catalase (CAT) activities as well as total antioxidant capacity (TAC), nitric oxide (NO), protein carbonyl (PC), and malondialdehyde (MDA) levels were measured in all the subjects. Levels of OCs were remarkably higher in patients with leukemia compared with the controls (p<0.05). In addition, levels of SOD, AChE, GPx, PON1, and TAC were remarkably lower in patients with leukemia compared with controls (p<0.05). In contrast, MDA, NO, and PC concentrations were higher in patients with leukemia than in the controls (p<0.05). Moreover, the serum level of 4,4-DDE was negatively associated with GPx activity (p=0.038). Our findings suggest that OCs may play a role in the development of leukemia by disrupting the oxidant/antioxidant balance.No data are available.