The Impact of Cadmium Telluride Quantum Dots on Male Reproductive Health: A Systematic Review of Toxicological Effects and Mechanisms

Abstract

Cadmium telluride (CdTe) quantum dots (QDs) are widely utilized in biomedical applications because of their unique optical properties. However, concerns regarding their potential reproductive toxicity have emerged, necessitating comprehensive toxicological evaluations. Evidence suggests that Cd-based QDs can traverse the blood-testis barrier, accumulate in testicular tissue, and impair male fertility. Studies have reported detrimental effects, including reduced sperm quality, endocrine disruption, and oxidative stress-induced cellular damage. Moreover, multigenerational toxicity has been observed, with adverse effects on offspring, such as developmental delays, lower body weights, and biochemical markers of hepatic and renal dysfunction. To mitigate these toxic effects, various protective strategies have been investigated. Antioxidants, including astaxanthin nanoparticles and N-acetylcysteine, have demonstrated efficacy in reducing oxidative stress by neutralizing reactive oxygen species and restoring the cellular balance. Additionally, surface modifications, particularly zinc sulfide coatings, have shown promise in limiting cadmium ion release, thereby decreasing cytotoxicity and reproductive harm. The potential reproductive toxicity of CdTe QDs underscores the importance of developing safer nanomaterials. Future research should prioritize optimizing nanoparticle design, refining exposure parameters, and elucidating the molecular mechanisms underlying their toxicity to increase biocompatibility while minimizing reproductive risk.