THC exposure triggered caspase-3 activation, morphological changes in microglia, and astrocyte reactivity in the rat cerebellum, indicating neurotoxic and inflammatory effects.
Neuroscientists, toxicologists, and researchers studying cannabis effects on brain tissue.
Caspase-3 increaseTHC at 10 mg/kg triggered apoptosis markers and inflammatory glial changes in rat cerebellum
What the researchers found
THC at 10 mg/kg caused increased caspase-3 (apoptosis marker), altered microglial morphology, and astrocyte reactivity in the cerebellum, demonstrating both neurotoxic and neuroinflammatory effects in this brain region.
Why it matters
The cerebellum is critical for motor coordination and increasingly recognized for cognitive and emotional functions. THC-induced changes here could explain motor and cognitive effects of cannabis use.
The numbers in context
10 mg/kg THC dose in male rats was assessed using stereology, Sholl analysis, immunofluorescence, and real-time qPCR for cerebellar changes.
How the study worked
Preclinical histological study using multiple techniques (stereology, Sholl analysis, immunofluorescence, RT-qPCR) to assess THC effects on rat cerebellum.
Who was studied
Male rats exposed to 10 mg/kg THC, with cerebellar tissue analyzed using multiple histological and molecular techniques.
What this study cannot tell us
Single high dose in rats; acute exposure may not represent chronic human use patterns; rat cerebellar development differs from human; 10 mg/kg is a relatively high dose.
How to read the evidence
Preclinical histological study with multiple assessment techniques; single dose and species limits translation.
When this study was published
Recent preclinical study with detailed cerebellar assessment methodology.
The bigger picture
This detailed histological analysis adds to understanding of how THC affects brain tissue at the cellular level, potentially explaining some cognitive and motor effects of cannabis use.
Replication
Adds cerebellar data to THC neurotoxicity literature; multiple histological techniques strengthen findings.
Funding
Not specified
Conflicts of interest
Not specified
Questions still open
- Are these cerebellar changes reversible?
- Do chronic lower doses produce similar effects?
- Does CBD co-administration protect against these changes?
Read the original research
Exposure to Δ9-tetrahydrocannabinol leads to a rise in caspase-3, morphological changes in microglial, and astrocyte reactivity in the cerebellum of rats.
Toxicology research, 12(6), 1077-1094
Citation
Mohammadpanah, Mojtaba; Farrokhi, Sheida; Sani, Mojtaba; Moghaddam, Meysam Hassani; Bayat, Amir-Hossein; Boroujeni, Mahdi Eskandarian; Abdollahifar, Mohammad-Amin; Fathi, Mobina; Vakili, Kimia; Nikpour, Fatemeh; Omran, Hossein Salehi; Ahmadirad, Hossein; Ghorbani, Zeynab; Peyvandi, Ali Asghar; Aliaghaei, Abbas. (2023). Exposure to Δ9-tetrahydrocannabinol leads to a rise in caspase-3, morphological changes in microglial, and astrocyte reactivity in the cerebellum of rats.. Toxicology research, 12(6), 1077-1094. https://doi.org/10.1093/toxres/tfad098