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Membranoproliferative glomerulonephritis in a girl and her mother
Osamu Motoyama1, Ken Sakai, Yasushi Ohashi
1Department of Pediatrics, Toho University Medical Center, Sakura Hospital, 564-1 Shimoshizu, Sakura, Chiba, Japan. motoyan@basil.ocn.ne.jp
Insights
This study reports the first known familial cases of membranoproliferative glomerulonephritis (MPGN) type I in Japan, affecting a mother and daughter across two generations. Both experienced persistent symptoms and hypocomplementemia, highlighting a potential genetic link in MPGN.
Area of Science:
- Nephrology
- Genetics
- Internal Medicine
Background:
- Membranoproliferative glomerulonephritis (MPGN) type I is a rare kidney disease.
- Familial MPGN is uncommon, with limited documented cases globally.
- Understanding the genetic basis of MPGN is crucial for diagnosis and treatment.
Observation:
- A mother and daughter diagnosed with MPGN type I presented with microscopic hematuria and proteinuria at ages 9 and 14, respectively.
- Both patients exhibited persistent hypocomplementemia and were treated with corticosteroids.
- The mother, at 40, still had proteinuria and reduced creatinine clearance (64.4 ml/min/1.73 m²); the daughter, at 15, had ongoing microscopic hematuria.
Findings:
- This represents the first reported instance of familial MPGN type I spanning two generations in Japan.
- The clinical presentation and persistent hypocomplementemia suggest a potential hereditary component.
- The long-term persistence of renal abnormalities underscores the chronic nature of the disease.
Implications:
- This case highlights the importance of considering familial inheritance patterns in MPGN diagnosis.
- Further research into the genetic factors underlying MPGN in this family may reveal new insights.
- Early identification and management strategies for familial MPGN can potentially improve patient outcomes.
Abstract:
A girl and her mother were diagnosed as having membranoproliferative glomerulonephritis (MPGN) type I. Microscopic hematuria and proteinuria presented at 9 years of age in the mother and at 14 years in the daughter. Both had persistent hypocomplementemia and were treated with steroids. When the mother was 40 years old, proteinuria was still continuing and creatinine clearance was 64.4 ml/min per 1.73 m(2). When the daughter was 15 years old, microscopic hematuria was still continuing. To our knowledge, familial cases of MPGN in two generations have not been reported in Japan.