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A RAPID Method for Blood Processing to Increase the Yield of Plasma Peptide Levels in Human Blood
Published on: April 28, 2016
Posttranslational processing of progastrin
Jens R Bundgaard1, Jens F Rehfeld
1Department of Clinical Biochemistry, KB 3014, Rigshospitalet, University of Copenhagen, Blegdamsvej 9, 2100, Copenhagen, Denmark. jrb@rh.dk
Results and Problems in Cell Differentiation
|December 5, 2009
Summary
Gastrin and cholecystokinin (CCK) are homologous hormones. This review details progastrin
Area of Science:
- Endocrinology and Neuroscience
- Molecular and Cellular Biology
Background:
- Gastrin and cholecystokinin (CCK) are homologous hormones with critical roles in the brain and gastrointestinal tract.
- While transcription regulates tissue-specific expression, post-translational processing is crucial for accurate prohormone maturation.
- Differences in post-translational processing and secretion exist between gastrin and CCK, suggesting evolved, specific functions.
Purpose of the Study:
- To review the post-translational processing of gastrin and its products in gastrin gene-expressing tissues.
- To discuss the roles of specific processing enzymes and structural features of progastrin in precursor activation.
- To elucidate how cell-specific enzyme expression and secretory pathway kinetics influence progastrin processing.
Main Methods:
- Review of existing literature on gastrin and CCK biogenesis.
- Analysis of post-translational modifications and processing pathways.
- Discussion of enzyme kinetics and cellular expression patterns.
Main Results:
- Progastrin processing is complex and cell-specific, ensuring accurate maturation of gastrin and related peptides.
- CCK and gastrin exhibit distinct post-translational processing and secretion, correlating with their circulating concentrations and functions.
- Neoplastic cells often exhibit disturbed progastrin processing, impacting hormone function in cancers.
Conclusions:
- Post-translational processing is a critical determinant of gastrin and CCK function.
- Variations in processing contribute to differences in hormone levels and biological activities.
- Understanding progastrin processing is vital for comprehending its role in both normal physiology and disease, particularly cancer.
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