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[Congenital nephrogenic diabetes insipidus]
1Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, Ohio 44106-4982.
La Revue Du Praticien
|May 1, 1994
Summary
Congenital nephrogenic diabetes insipidus results from mutations in the vasopressin V2 receptor gene. These genetic defects cause kidney insensitivity to vasopressin, leading to the disease.
Area of Science:
- Genetics
- Molecular Biology
- Endocrinology
Context:
- Congenital nephrogenic diabetes insipidus (cNDI) is a rare hereditary disorder.
- It is characterized by the kidneys' inability to respond to vasopressin.
- Genetic studies pinpoint the responsible gene to the X chromosome.
Purpose:
- To investigate the genetic basis of congenital nephrogenic diabetes insipidus.
- To identify the specific molecular defects causing renal insensitivity to vasopressin.
- To confirm the role of the vasopressin V2 receptor gene in cNDI.
Summary:
- Genetic linkage studies localized the cNDI gene to Xq28.
- The gene for the vasopressin V2 receptor is also in Xq28, suggesting a receptor defect.
- Several point mutations in the V2 receptor gene have been identified in patients.
- One mutation confirmed to abolish cyclic AMP production in response to vasopressin.
Impact:
- Establishes mutations in the vasopressin V2 receptor gene as the molecular cause of cNDI.
- Highlights the genetic heterogeneity of the disease.
- Provides a basis for understanding the pathophysiology of cNDI at the molecular level.