Cannabis Use Linked to Genetic Changes, Increased Cancer Risks and Hereditary Disruptions

Cannabis Use and Genetic Changes

Research shows that cannabis use can cause genetic changes that increase cancer risks and hereditary issues. A study published in Addiction Biology highlights how cannabis affects cell structure and function, leading to internal damage that might impact future generations.

The study found that cannabinoids, the active ingredients in cannabis, can harm mitochondrial function and increase micronuclei formation—small bodies with fragmented DNA. These changes create genetic instability, raising the risk of mutations that could affect descendants.

Researchers studied specific proteins, like Charged Multivesicular Body Protein 7 (CHMP7) and components of the Endosomal Sorting Complex Required for Transport III (ESCRT-III). These proteins lose functionality when oxidized, leading to cellular collapse. Damage in germline cells can result in immediate genetic harm and mutations passed to future generations.

Several cancers, including testicular, pancreatic, thyroid, and breast cancers, are linked to cannabis use. Regular users face a 2.6-fold higher risk for testicular cancer. Areas with high cannabis cultivation report more congenital abnormalities like cardiovascular and limb issues. Mis-segregation of chromosomes during meiosis in these regions correlates with birth defects such as limb absence (amelia) and shortened limbs (phocomelia).

Cannabis use also leads to epigenetic changes, which affect gene expression without altering the DNA sequence. This effect can accelerate cellular aging. Studies show that users as young as 30 exhibit increased cellular aging. Long-term use disrupts the balance of gene expression and affects reproductive cells, impacting both the user and their offspring.

Recent studies noted alterations in DNA methylation patterns linked to developmental conditions like autism spectrum disorder (ASD). This highlights the need for further research on the connection between cannabis use and ASD.

Future studies must identify safe levels of cannabis for those planning to conceive. Research may also explore whether certain cannabis strains or THC levels pose less risk.

Sources:

Study links cannabis use to genotoxicity and transgenerational health impacts

Key insights into cannabis‐cancer pathobiology and genotoxicity