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Decrease in hypothalamic vasopressin mRNA poly(A) tail length following physiological stimulation
K F Chooi1, D A Carter, D Murphy
1Neuropeptide Laboratory, National University of Singapore.
Cellular and Molecular Neurobiology
|December 1, 1992
Summary
Vasopressin mRNA poly(A) tail length modulation is age-dependent in young rats. Starvation has an opposite effect to dehydration, revealing a novel poly(A) tail shortening mechanism.
Area of Science:
- Neurobiology
- Molecular Biology
- Gene Regulation
Background:
- Vasopressin mRNA regulation in adult rats involves transcript abundance and poly(A) tail lengthening.
- The ontogeny and specific regulatory mechanisms of vasopressin mRNA poly(A) tail modulation are not fully understood.
Purpose of the Study:
- To investigate the age-dependent modulation of vasopressin mRNA poly(A) tail length in response to physiological stimuli in neonatal rats.
- To differentiate the effects of dehydration and starvation on vasopressin mRNA poly(A) tail length.
Main Methods:
- Analysis of vasopressin mRNA poly(A) tail length in rat neonates subjected to milk deprivation.
- Comparative study of dehydration and starvation effects on vasopressin mRNA poly(A) tail length in mature rats.
Main Results:
- In rats older than 12 days, milk deprivation increased vasopressin mRNA poly(A) tail length.
- In rats aged 5-9 days, milk deprivation caused a non-significant decrease in poly(A) tail length.
- Starvation induced a poly(A) tail length modification opposite to that of dehydration.
Conclusions:
- Vasopressin mRNA poly(A) tail length modulation is age-dependent and stimulus-specific.
- Poly(A) tail shortening represents a novel regulatory mechanism for vasopressin mRNA.
- This system serves as a model for studying adaptive roles of poly(A) tail modulation in response to physiological cues.