Nitrate-Induced DNA damage and carcinogenesis in children: Agrochemical contaminants as hidden catalysts for pediatric cancer proliferation

Nitrate contamination, primarily derived from agrochemical runoff, fertilizers, and industrial waste, has emerged as a significant environmental and public health concern, particularly for children. As a prevalent groundwater pollutant, nitrates undergo biochemical conversion to nitrites and N-nitroso compounds (NOCs), which exhibit potent genotoxic and carcinogenic properties. Chronic exposure to these compounds has been linked to DNA damage, oxidative stress, and epigenetic alterations, raising concerns about their role in pediatric cancer proliferation. Epidemiological studies suggest a strong correlation between early-life nitrate exposure and increased risks of childhood leukemias, brain tumors, and gastrointestinal cancers. The mechanisms underlying nitrate-induced carcinogenesis include reactive oxygen species (ROS) generation, DNA strand breaks, and disruption of cell cycle regulation, which promote malignant transformation. Additionally, nitrate ingestion through contaminated drinking water, food sources, and prenatal exposure amplifies cancer susceptibility, particularly in developing tissues with heightened vulnerability to mutagenic insults. This review evaluates the biological and toxicological pathways of nitrate-induced DNA damage, emphasizing the cumulative effects of agrochemical contaminants in pediatric cancer cases. A critical analysis of dose-response relationships, exposure thresholds, and synergistic effects with other environmental carcinogens highlights the urgent need for enhanced water quality regulations, biomonitoring strategies, and policy interventions to mitigate exposure risks. Given the increasing global incidence of childhood cancers, a multidisciplinary approach integrating toxicology, public health, and environmental science is essential for safeguarding children from the hidden oncogenic potential of nitrate contamination.