Prenatal THC exposure showed narrow effects on fetal muscle but triggered inflammation-related gene changes in primates
In a nonhuman primate model, chronic prenatal THC exposure had limited overall effects on fetal and infant muscle development but activated inflammation and cytokine signaling pathways that suggest potential for tissue damage and atrophy.
Quick Facts
What This Study Found
RNA analysis of fetal and infant skeletal muscle using a 770-gene neuroinflammatory panel revealed that prenatal THC exposure had narrow overall effects on muscle development. The greatest impacts were in pathways related to inflammation and cytokine signaling, suggesting potential for tissue damage and atrophy. Histomorphological evaluation showed limited changes in muscle morphology and composition.
Key Numbers
770 genes analyzed via Nanostring nCounter panel. Inflammation and cytokine signaling pathways most affected. Histomorphological changes limited. Pilot study establishes feasibility for follow-on research.
How They Did This
Pilot study using a nonhuman primate model with chronic prenatal THC exposure. RNA isolated from skeletal muscle analyzed for differential gene expression using Nanostring nCounter neuroinflammatory panel (770 genes). Histomorphological evaluation of muscle morphology also performed.
Why This Research Matters
This is the first study to examine prenatal THC effects on musculoskeletal development in a highly translational primate model. While effects were narrow, the inflammation signals raise concerns about longer-term functional consequences as offspring mature.
The Bigger Picture
Most prenatal cannabis research focuses on brain development. This study expands the scope to musculoskeletal effects, finding that while gross muscle development appears largely intact, molecular-level inflammation signals may have consequences that only become apparent later in development.
What This Study Doesn't Tell Us
Pilot study with likely very small sample size (not specified in abstract). Nonhuman primate model is translational but not identical to human development. Gene panel focused on neuroinflammation, which may miss muscle-specific pathways. Short follow-up cannot capture long-term functional outcomes.
Questions This Raises
- ?Do the inflammatory gene changes observed translate to measurable functional deficits as offspring develop?
- ?Would longer follow-up reveal progressive muscle changes not apparent in the fetal/infant period?
Trust & Context
- Key Stat:
- prenatal THC exposure activated cytokine signaling pathways in fetal primate muscle despite limited gross morphological changes
- Evidence Grade:
- Highly translational primate model with molecular-level analysis, but pilot study likely has very small sample and cannot determine functional significance of gene changes.
- Study Age:
- 2024 publication.
- Original Title:
- Effects of in utero delta-9-tetrahydrocannabinol (THC) exposure on fetal and infant musculoskeletal development in a preclinical nonhuman primate model.
- Published In:
- PloS one, 19(7), e0306868 (2024)
- Authors:
- Moellmer, Samantha A, Hagen, Olivia L(5), Farhang, Parsa A, Duke, Victoria R, Fallon, Meghan E, Hinds, Monica T, McCarty, Owen J T, Lo, Jamie O, Nakayama, Karina H
- Database ID:
- RTHC-05560
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
Does THC during pregnancy affect the baby's muscles?
In this primate study, prenatal THC did not cause obvious muscle structural changes, but it activated inflammatory gene pathways in fetal muscle tissue. Whether these molecular changes lead to functional problems requires longer-term follow-up studies.
Why use a primate model?
Nonhuman primates share close developmental similarity with humans, making findings more translatable than rodent studies. This is especially important for prenatal research where timing and biology of fetal development differ substantially across species.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-05560APA
Moellmer, Samantha A; Hagen, Olivia L; Farhang, Parsa A; Duke, Victoria R; Fallon, Meghan E; Hinds, Monica T; McCarty, Owen J T; Lo, Jamie O; Nakayama, Karina H. (2024). Effects of in utero delta-9-tetrahydrocannabinol (THC) exposure on fetal and infant musculoskeletal development in a preclinical nonhuman primate model.. PloS one, 19(7), e0306868. https://doi.org/10.1371/journal.pone.0306868
MLA
Moellmer, Samantha A, et al. "Effects of in utero delta-9-tetrahydrocannabinol (THC) exposure on fetal and infant musculoskeletal development in a preclinical nonhuman primate model.." PloS one, 2024. https://doi.org/10.1371/journal.pone.0306868
RethinkTHC
RethinkTHC Research Database. "Effects of in utero delta-9-tetrahydrocannabinol (THC) expos..." RTHC-05560. Retrieved from https://rethinkthc.com/research/moellmer-2024-effects-of-in-utero
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.