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Opioids in neural and nonneural tissues
1Department of Clinical Chemistry, School of Medicine, University of Crete, Iraklion 71110, Greece.
Trends in Endocrinology and Metabolism: TEM
|July 1, 1993
Summary
Endogenous opioid peptides (EOPs) show distinct tissue distribution patterns and gene expression in cells. Opioids influence cell differentiation and proliferation, impacting normal and neoplastic cell growth.
Area of Science:
- Neuroscience
- Molecular Biology
- Endocrinology
Background:
- Endogenous opioid peptides (EOPs) are classified into three families based on precursor molecules and receptor affinity.
- EOP genes are expressed across diverse cell types, including neural, neurosecretory, and endocrine cells.
Purpose of the Study:
- To review and identify patterns in the distribution and expression of endogenous opioid peptides.
- To explore the relationship between opioid peptides, cell proliferation, and differentiation.
Main Methods:
- Literature review of studies on endogenous opioid peptide expression and function.
- Analysis of EOP gene expression patterns in different cell types.
- Examination of the effects of mitogenic factors and opioids on cell proliferation and differentiation.
Main Results:
- EOP tissue distribution is family-specific.
- EOP-producing cells are categorized by single or multiple EOP gene expression; neural cells typically express one, while nonneural cells express multiple.
- Opioids are linked to cell differentiation and can inhibit proliferation of normal and neoplastic cells.
Conclusions:
- Distinct patterns in EOP distribution and gene expression exist.
- Opioid signaling plays a role in regulating cell proliferation and differentiation states.
- Further research is needed to fully elucidate the physiological implications of these opioid-cell interactions.
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