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Utility of Cystatin C for Estimating Glomerular Filtration Rate in Patients With Muscular Dystrophy

Koichi Kimura1, Hiroyuki Morita, Masao Daimon

  • 1Department of Cardiovascular Medicine, Graduate School of Medicine, The University of Tokyo.

International Heart Journal
|May 13, 2016
PubMed

Insights

Muscular dystrophy patients may have undiagnosed kidney problems. Serum cystatin C accurately estimates kidney function (GFR), aiding early detection and management of renal dysfunction in these individuals.

Area of Science:

  • Nephrology
  • Cardiology
  • Neurology
  • Clinical Biochemistry

Background:

  • Heart failure, arrhythmia, and sudden death are recognized concerns in muscular dystrophy.
  • Renal dysfunction is often overlooked in muscular dystrophy due to low serum creatinine levels.
  • Serum cystatin C is a reliable marker for kidney function, independent of muscle mass.

Observation:

  • This study presents cases of muscular dystrophy patients where cystatin C-based estimated glomerular filtration rate (eGFRcys) closely matched inulin renal clearance.
  • A patient with muscular dystrophy experienced sudden death due to acute heart failure, complicated by underlying renal dysfunction and elevated BNP.

Findings:

  • Estimated GFR by cystatin C (eGFRcys) demonstrated good agreement (<20% difference) with measured GFR by inulin clearance in muscular dystrophy patients.
  • The findings highlight the potential for cystatin C to serve as a superior marker for renal function assessment in this population.

Implications:

  • Neurologists and cardiologists should routinely assess renal function in muscular dystrophy patients using cystatin C-based GFR estimation.
  • Early identification of renal dysfunction may improve patient outcomes and prevent complications like acute heart failure.

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