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Kidney Int. 2012 Jul;82(2):226-34. doi: 10.1038/ki.2012.108. Epub 2012 Apr 11.

Laser microdissection and mass spectrometry-based proteomics aids the diagnosis and typing of renal amyloidosis.

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1
Division of Anatomic Pathology, Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905, USA. sethi.sanjeev@mayo.edu

Abstract

Accurate diagnosis and typing of renal amyloidosis is critical for prognosis, genetic counseling, and treatment. Laser microdissection and mass spectrometry are emerging techniques for the analysis and diagnosis of many renal diseases. Here we present the results of laser microdissection and mass spectrometry performed on 127 cases of renal amyloidosis during 2008-2010. We found the following proteins in the amyloid deposits: immunoglobulin light and heavy chains, secondary reactive serum amyloid A protein, leukocyte cell-derived chemotaxin-2, fibrinogen-α chain, transthyretin, apolipoprotein A-I and A-IV, gelsolin, and β-2 microglobulin. Thus, laser microdissection of affected areas within the kidney followed by mass spectrometry provides a direct test of the composition of the deposit and forms a useful ancillary technique for the accurate diagnosis and typing of renal amyloidosis in a single procedure.

PMID:
22495291
PMCID:
PMC3388518
DOI:
10.1038/ki.2012.108
[Indexed for MEDLINE]
Free PMC Article
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