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Molecular studies on kinin receptors
1Sandoz Institute for Medical Research, London, United Kingdom.
Canadian Journal of Physiology and Pharmacology
|July 1, 1995
Summary
Researchers studied bradykinin receptors from humans, rats, and mice. Mouse bradykinin receptors showed both B1 and B2 properties, unlike human and rat receptors, suggesting distinct genetic encoding.
Area of Science:
- Molecular pharmacology
- Receptor biology
- Genomics
Background:
- Bradykinin receptors play crucial roles in physiological processes.
- Understanding bradykinin receptor subtypes (B1 and B2) is essential for therapeutic development.
- Previous studies have identified distinct pharmacological profiles for B1 and B2 receptors.
Purpose of the Study:
- To functionally characterize DNA clones encoding bradykinin receptors from human, rat, and mouse.
- To investigate the pharmacological properties of these receptors in different expression systems.
- To explore the molecular basis of B1 and B2 receptor subtype expression.
Main Methods:
- Functional expression studies using Xenopus oocytes and COS cells.
- Pharmacological characterization of receptor activation by bradykinin and related peptides.
- Analysis of mRNA species encoding B1 and B2 receptor subtypes in human fibroblasts.
Main Results:
- Human and rat bradykinin receptors exhibited B2 receptor pharmacology.
- Mouse bradykinin receptors displayed mixed B1- and B2-like pharmacological properties.
- Distinct mRNA species were identified for human B1 and B2 receptor subtypes.
Conclusions:
- Species-specific variations exist in bradykinin receptor pharmacology, particularly in mice.
- The B1 and B2 bradykinin receptor subtypes are encoded by separate genes and transcripts.
- These findings contribute to a deeper understanding of bradykinin receptor diversity and function.