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Updated: Mar 31, 2026

Investigating the Pathogenesis of MYH7 Mutation Gly823Glu in Familial Hypertrophic Cardiomyopathy using a Mouse Model
Published on: August 8, 2022
MYH9 nephropathy.
Taehoon Oh1, Hyun Jung Seo1, Kyu Taek Lee1
1Department of Internal Medicine, Soonchunhyang University Cheonan Hospital, Cheonan, Korea.
MYH9-related disorder, a genetic condition, can cause kidney problems. This case study shows that proteinuria in MYH9 nephropathy may improve with certain blood pressure medications but worsen with others.
Area of Science:
- Genetics and Molecular Biology
- Nephrology
- Hematology
Background:
- MYH9-related disorder is an autosomal dominant genetic condition.
- It is caused by mutations in the MYH9 gene, encoding nonmuscle myosin heavy chain IIA.
- The disorder presents with characteristic features including giant platelets, thrombocytopenia, and nephropathy in 30% of cases.
Purpose of the Study:
- To describe a case of MYH9-related nephropathy.
- To investigate the clinical course and treatment response of proteinuria in a patient with MYH9 nephropathy.
- To contribute to understanding the prognosis of MYH9 nephropathy.
Main Methods:
- Case report of a 36-year-old woman with proteinuria.
- Diagnosis confirmed by renal biopsy and MYH9 gene analysis.
- Monitoring of proteinuria response to different antihypertensive medications (angiotensin II receptor blocker and calcium channel blocker).
Main Results:
- The patient was diagnosed with MYH9 nephropathy.
- Proteinuria initially improved with an angiotensin II receptor blocker.
- Proteinuria subsequently worsened upon switching to a calcium channel blocker.
Conclusions:
- MYH9-related nephropathy is a significant complication of the disorder.
- The response to antihypertensive medications can vary, impacting proteinuria.
- Further research is needed to clarify the prognosis and optimal management of MYH9 nephropathy.
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