Related Experiment Videos
Assessment of cannabinoid induced gene changes: tolerance and neuroprotection
Elena Grigorenko1, Joseph Kittler, Chris Clayton
1Millenium Pharmaceuticals Inc, Cambridge, MA, USA.
Abstract:
The analysis of gene changes associated with exposure to cannabinoids is critical due to the multiple possible signaling pathways potentially affected by cannabinoid receptor activation. A comparison of altered gene profiles under two different conditions, one in vivo (chronic exposure to delta-9-THC) and the other in vitro (neuroprotection mediated by WIN55212-2), was made to determine whether it was possible to identify common genes that were affected. Up and down-regulated sets of genes are described. Genes affected in one or the other circumstance include alterations in a 14-3-3 regulator protein of PKC, CREB, BDNF and GABA receptor subunit proteins, as well as several genes associated with known cannabinoid receptor-coupled signaling pathways. Unexpectedly, several genes that were altered in both circumstances were associated with synaptic and membrane structure, motility and neuron growth. These included, neuronal cell adhesion molecule (NCAM), hyloronidan motility receptor, and myelin proteolipid protein. While the basis for involvement of these particular genes in cannabinoid receptor activated functional processes within the cell is still not well understood, awareness that significant numbers of genes and presumably proteins are changed following either acute or long-term exposure may provide new insight into their effects.
Insights
Cannabinoid exposure alters gene expression, impacting signaling pathways and neuron growth. This study identified common genes affected by delta-9-THC in vivo and WIN55212-2 in vitro, revealing insights into cannabinoid receptor function.
Area of Science:
- Neuroscience
- Molecular Biology
- Pharmacology
Background:
- Cannabinoid receptor activation affects multiple signaling pathways.
- Understanding gene expression changes is crucial for cannabinoid research.
Purpose of the Study:
- To compare gene expression profiles from in vivo and in vitro cannabinoid exposure models.
- To identify common genes affected by delta-9-THC and WIN55212-2.
Main Methods:
- Analysis of gene expression changes in response to chronic delta-9-THC exposure (in vivo).
- Analysis of gene expression changes during WIN55212-2-mediated neuroprotection (in vitro).
- Comparison of up- and down-regulated gene sets between the two conditions.
Main Results:
- Identified common affected genes involved in cannabinoid signaling pathways, including CREB and BDNF.
- Observed alterations in genes related to synaptic and membrane structure, neuron growth, and motility, such as NCAM and myelin proteolipid protein.
- Found changes in regulators like 14-3-3 protein and GABA receptor subunits.
Conclusions:
- Cannabinoid receptor activation leads to significant changes in gene expression affecting both known signaling pathways and unexpected cellular processes.
- Genes involved in neuronal structure and growth are unexpectedly altered by cannabinoid exposure.
- Further research is needed to understand the mechanisms linking cannabinoid receptor activation to changes in synaptic and membrane structure genes.