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Akt3 Regulates the Tissue-Specific Response to Copaiba Essential Oil
Yasuyo Urasaki1, Cody Beaumont2, Jeffery N Talbot1
1College of Pharmacy, Roseman University of Health Sciences, 10530 Discovery Drive, Las Vegas, NV 89135, USA.
Abstract:
This study reports a relationship between Akt3 expression and tissue-specific regulation of the pI3K/Akt/mTOR signaling pathway by copaiba essential oil. Akt3, a protein kinase B isoform important for the regulation of neuronal development, exhibited differential expression levels in cells of various origins. In neuronal and microglial cells, where Akt3 is present, copaiba essential oil positively regulated the pI3K/Akt/mTOR signaling pathway. In contrast, in liver cells and T lymphocytes, where Akt3 is absent, copaiba essential oil negatively regulated the pI3K/Akt/mTOR signaling pathway. The expression of Akt3 via plasmid DNA in liver cells led to positive regulatory effects by copaiba essential oil on the pI3K/Akt/mTOR signaling pathway. In contrast, inhibition of Akt3 expression in neuronal cells via small interfering RNA molecules targeting Akt3 transcripts abrogated the regulatory effects of copaiba essential oil on the pI3K/Akt/mTOR signaling pathway. Interestingly, Akt3 expression did not impact the regulatory effects of copaiba essential oil on other signaling pathways. For example, copaiba essential oil consistently upregulated the MAPK and JAK/STAT signaling pathways in all evaluated cell types, independent of the Akt3 expression level. Collectively, the data indicated that Akt3 expression was required for the positive regulatory effects of copaiba essential oil, specifically on the pI3K/Akt/mTOR signaling pathway.
Insights
Copaiba essential oil
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Akt3, a key protein kinase B isoform, regulates neuronal development.
- The PI3K/Akt/mTOR pathway is crucial in cellular signaling.
- Copaiba essential oil is known for its biological activities.
Purpose of the Study:
- To investigate the role of Akt3 expression in copaiba essential oil's regulation of the PI3K/Akt/mTOR pathway.
- To determine tissue-specific effects of copaiba essential oil based on Akt3 presence.
- To elucidate the mechanism of copaiba essential oil's action on specific signaling cascades.
Main Methods:
- Differential expression analysis of Akt3 in various cell types (neuronal, microglial, liver, T lymphocytes).
- Treatment with copaiba essential oil and assessment of PI3K/Akt/mTOR pathway activity.
- Modulation of Akt3 expression using plasmid DNA and small interfering RNA (siRNA).
- Analysis of other signaling pathways (MAPK, JAK/STAT) for comparison.
Main Results:
- Copaiba essential oil positively regulated the PI3K/Akt/mTOR pathway in Akt3-expressing cells (neuronal, microglial).
- Copaiba essential oil negatively regulated the PI3K/Akt/mTOR pathway in Akt3-absent cells (liver, T lymphocytes).
- Restoring Akt3 expression in liver cells induced positive regulation by copaiba essential oil.
- Inhibiting Akt3 in neuronal cells abolished copaiba essential oil's positive regulatory effect on the PI3K/Akt/mTOR pathway.
- Copaiba essential oil consistently upregulated MAPK and JAK/STAT pathways irrespective of Akt3 levels.
Conclusions:
- Akt3 expression is essential for the positive regulatory effects of copaiba essential oil on the PI3K/Akt/mTOR signaling pathway.
- The study highlights Akt3's critical role in mediating tissue-specific responses to copaiba essential oil.
- These findings provide insights into the molecular mechanisms underlying copaiba essential oil's therapeutic potential.
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