Cannabis exposure altered DNA methylation at autism-linked genes in lab-grown sperm cells
Using a lab model of human sperm development, researchers found cannabis exposure changed DNA methylation at genes linked to genomic imprinting and autism spectrum disorder.
Quick Facts
What This Study Found
In an in vitro human spermatogenesis model, cannabis exposure significantly altered DNA methylation at maternally imprinted genes (SGCE, GRB10, PEG3) and autism candidate genes (HCN1, NR4A2) in spermatogonial stem cell-like and spermatid-like cells.
Key Numbers
Methylation changes found at 3 imprinted genes (SGCE, GRB10, PEG3) and 2 of 10 randomly selected ASD candidate genes (HCN1, NR4A2).
How They Did This
Used an in vitro human spermatogenesis model to simulate chronic cannabis exposure. Assessed DNA methylation at imprinted genes and 10 randomly selected ASD candidate genes in spermatogonial stem cell (SSC)-like and spermatid-like cells.
Why This Research Matters
This study provides a mechanistic link between paternal cannabis use and potential heritable changes at genes associated with autism, supporting epidemiological observations of increased ASD risk in children of cannabis-using fathers.
The Bigger Picture
The idea that a father's substance use before conception could affect offspring neurodevelopment through epigenetic changes challenges traditional assumptions and has major public health implications.
What This Study Doesn't Tell Us
This is an in vitro model, not actual human sperm from cannabis users. Only 10 ASD candidate genes were sampled. The functional consequences of these methylation changes on offspring are not established.
Questions This Raises
- ?Do these methylation changes translate to actual autism risk in children?
- ?Are the effects reversible if cannabis use stops before conception?
- ?How long must exposure last to produce these changes?
Trust & Context
- Key Stat:
- 2 of 10 randomly selected autism genes showed altered methylation
- Evidence Grade:
- Preliminary: in vitro model only, no human cohort data on actual offspring outcomes.
- Study Age:
- Published in 2022.
- Original Title:
- Cannabis alters DNA methylation at maternally imprinted and autism candidate genes in spermatogenic cells.
- Published In:
- Systems biology in reproductive medicine, 68(5-6), 357-369 (2022)
- Authors:
- Schrott, Rose(6), Greeson, Katherine W, King, Dillon, Symosko Crow, Krista M, Easley, Charles A, Murphy, Susan K
- Database ID:
- RTHC-04203
Evidence Hierarchy
Watches what happens naturally without intervening.
What do these levels mean? →Frequently Asked Questions
What is DNA methylation and why does it matter?
DNA methylation is a chemical modification that can turn genes on or off without changing the DNA sequence itself. Changes in sperm methylation can potentially be passed to offspring and affect their development.
What are imprinted genes?
Imprinted genes are expressed from only one parent's copy. Disrupting their methylation can have outsized effects because there is no backup copy to compensate.
Does this prove cannabis causes autism?
No. This study shows cannabis can change methylation at ASD-linked genes in a lab model of sperm cells. Whether these changes actually increase autism risk in children requires follow-up studies in human families.
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Cite This Study
https://rethinkthc.com/research/RTHC-04203APA
Schrott, Rose; Greeson, Katherine W; King, Dillon; Symosko Crow, Krista M; Easley, Charles A; Murphy, Susan K. (2022). Cannabis alters DNA methylation at maternally imprinted and autism candidate genes in spermatogenic cells.. Systems biology in reproductive medicine, 68(5-6), 357-369. https://doi.org/10.1080/19396368.2022.2073292
MLA
Schrott, Rose, et al. "Cannabis alters DNA methylation at maternally imprinted and autism candidate genes in spermatogenic cells.." Systems biology in reproductive medicine, 2022. https://doi.org/10.1080/19396368.2022.2073292
RethinkTHC
RethinkTHC Research Database. "Cannabis alters DNA methylation at maternally imprinted and ..." RTHC-04203. Retrieved from https://rethinkthc.com/research/schrott-2022-cannabis-alters-dna-methylation
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.