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Age-dependent decrease in the ghrelin gene expression in the human adrenal cortex: a real-time PCR study.
Gianni Carraro1, Giovanna Albertin, Francesco Aragona
1Department of Anatomy and Physiology, Section of Anatomy, University of Padua, I-35121 Padua, Italy.
International Journal of Molecular Medicine
|January 5, 2006
Summary
Ghrelin gene expression in the adrenal cortex significantly decreases with age in humans. This finding suggests a potential link between reduced ghrelin and age-related changes in adrenal function.
Area of Science:
- Endocrinology
- Molecular Biology
- Aging Research
Background:
- Ghrelin, the endogenous ligand for the growth hormone-secretagogue receptor, is present in the adrenal cortex.
- Ghrelin influences adrenocortical cell growth and proliferation.
Purpose of the Study:
- To investigate age-related changes in ghrelin gene expression within the human adrenal cortex.
- To explore the potential implications of these changes on adrenal function during aging.
Main Methods:
- Semi-quantitative real-time reverse transcription-polymerase chain reaction (RT-PCR) was employed.
- Adrenal cortex tissue samples from 27 patients (33-82 years old) were analyzed.
Main Results:
- A significant negative correlation was found between ghrelin mRNA levels and patient age.
- No significant differences in adrenal ghrelin expression were observed between males and females.
Conclusions:
- Adrenal ghrelin gene transcription down-regulates with aging in humans.
- This age-associated decrease may contribute to reduced adrenal DNA synthesis and mitogenic activity observed in aging.