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Postmortem stability of somatostatin in brain tissue
P E Cooper1, Q Rahman, T Phillips
1Department of Clinical Neurological Sciences, University of Western Ontario, London, Canada.
Neurochemical Research
|June 1, 1988
Summary
Somatostatin (SS) degrades in frozen post-mortem brain tissue. Avoid freezing human or rat brain samples to preserve somatostatin for accurate research.
Area of Science:
- Neuroscience
- Biochemistry
Background:
- Somatostatin (SS) is a crucial neuropeptide involved in various brain functions.
- Accurate quantification of somatostatin is essential for understanding neurological disorders.
Purpose of the Study:
- To investigate the stability of somatostatin in post-mortem human and rat brain tissue.
- To determine the impact of freezing on somatostatin levels and identify optimal storage conditions.
Main Methods:
- Analysis of somatostatin content in post-mortem human and rat brain samples.
- Comparison of somatostatin levels in fresh versus frozen (-70°C) tissue.
- Evaluation of different tissue processing methods in rats to assess somatostatin loss.
Main Results:
- Significant loss of somatostatin was observed in both human and rat brain tissue frozen at -70°C.
- In rat brain tissue, somatostatin loss ranged from 26% to 70% depending on processing methods.
- Freezing demonstrably compromises somatostatin integrity in brain tissue.
Conclusions:
- Frozen post-mortem brain tissue is unsuitable for reliable somatostatin studies.
- Researchers should avoid using frozen samples to ensure accurate somatostatin quantification.
- Alternative preservation methods are recommended for studying somatostatin in post-mortem brain samples.