Exposure to certain perfluoroalkyl substances, such as PFDA and PFOS, is linked to a higher risk of cancers in the urinary and reproductive organs, but not to cancers in the breast, thyroid, or...
Mechanism
Synthesis from 1 study
These chemicals stick around in certain parts of the body, like the bladder and kidneys, and mess up how cells communicate, clean up toxins, and repair DNA. This makes cancer more likely in those areas. Other organs either clear the chemicals faster or aren’t as affected by the damage they cause.
Most probable mechanism
Certain chemicals build up in the body and interfere with how cells talk to each other, stop the body from cleaning out harmful substances, and cause DNA damage. This makes some tissues, like those in the bladder, kidneys, and prostate, more likely to develop cancer, while other tissues, like the breast or thyroid, are less affected because they handle these chemicals differently.
Perfluoroalkyl substances enter epithelial cells through passive diffusion or transporters and accumulate in tissues with high metabolic or excretory activity.
These substances disrupt gap junctional communication by altering connexin proteins and calcium signaling, preventing cells from coordinating growth and repair.
They inhibit detoxifying enzymes that conjugate and eliminate carcinogens and estrogen metabolites, leading to prolonged exposure to DNA-damaging compounds.
Oxidative stress increases due to mitochondrial disruption and reduced antioxidant capacity, causing DNA lesions and genomic instability.
Apoptotic pathways are suppressed, allowing cells with damaged DNA to survive and proliferate.
Chronic inflammation is triggered through inflammasome activation, releasing cytokines that damage tissue structure and promote a tumor-friendly environment.
Epigenetic changes silence tumor suppressor genes and activate oncogenes, further driving uncontrolled cell growth.
Evidence from Studies
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Contradicting (1)
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Perfluoroalkyl and polyfluoroalkyl substances and Cancer risk: results from a dose-response Meta-analysis
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