Related Experiment Videos
Cloning and characterization of a cDNA encoding a precursor for human uroguanylin
M Miyazato1, M Nakazato, H Yamaguchi
1Third Department of Medicine, Miyazaki Medical College, Kiyotake, Japan.
Biochemical and Biophysical Research Communications
|February 15, 1996
Summary
Human uroguanylin, a peptide hormone, activates intestinal guanylate cyclase (GC-C). Researchers cloned its precursor and confirmed its expression in the stomach and intestine, suggesting a role in fluid and electrolyte transport.
Area of Science:
- Gastroenterology
- Molecular Biology
- Endocrinology
Background:
- Uroguanylin is part of the guanylin peptide family.
- It acts as an endogenous activator of intestinal guanylate cyclase (GC-C).
Purpose of the Study:
- To clone and sequence the precursor for human uroguanylin.
- To investigate the expression of human uroguanylin mRNA in different tissues.
Main Methods:
- Cloning of a human uroguanylin precursor from a colon cDNA library.
- DNA sequencing of the precursor.
- RNA blot analysis.
- Reverse transcription-polymerase chain reaction (RT-PCR) for gene expression analysis.
Main Results:
- A 112-amino acid precursor for human uroguanylin was identified.
- The precursor contains a signal peptide and the uroguanylin sequence.
- Human uroguanylin mRNA was detected in both the stomach and intestine.
Conclusions:
- Human uroguanylin is expressed in the gastrointestinal tract.
- Uroguanylin, alongside guanylin, may significantly regulate intestinal fluid and electrolyte transport.