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Molecular markers of injury in kidney biopsy specimens of patients with lupus nephritis.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Reich, Heather N. Landolt-Marticorena, Carol Boutros, Paul C. John, Rohan Wither, Joan Fortin, Paul R. Yang, Stuart Scholey, James W. Herzenberg, Andrew M.
Description	Country affiliation: Canada Author Affiliation: Reich HN ( University Health Network and University of Toronto, Toronto, Ontario, Canada. hreich@uhnresearch.ca)
Abstract	Prediction of prognosis in patients who have lupus nephritis is inadequate, limiting individualization of potentially toxic therapy. Advances in tissue molecular techniques offer new approaches to study mechanisms underlying kidney injury, and add to prognostic information gleaned from biopsy specimens. Analysis of mRNA expression in formalin-fixed, paraffin-embedded renal biopsy specimens is limited by both quantity and quality of RNA, requiring RNA pre-amplification, which can introduce bias. Accordingly, we developed a new technique for RNA extraction from human kidney formalin fixed paraffin embedded biopsy specimens, and used Taqman low-density arrays Applied Biosystems, Carlsbad, CA to simultaneously measure 48 mRNAs in duplicate, in a single biopsy. We extracted mRNA from more than 150 blocks to determine the quantity and vintage of biopsy tissue suitable for analysis using this protocol. We then used Taqman low-density arrays to identify suitable housekeeping genes in lupus nephritis. Finally, we measured expression of 48 mRNA transcripts in archived lupus biopsy specimens (n = 54). We identified that the mRNA levels of three transcripts (MMP7, EGF, COL1A1) relate to pathological indices of kidney injury and kidney function at the time of biopsy; these were associated with parallel changes in expression of these proteins. This new method for measurement of kidney biopsy mRNA expression has enabled us to identify tissue biomarkers of kidney damage and function, and potentially can increase the information yielded from diagnostic kidney biopsy specimens to improve tailoring of therapy.
File Format	HTM / HTML
ISSN	15251578
e-ISSN	19437811
DOI	10.1016/j.jmoldx.2010.10.005
Journal	The Journal of Molecular Diagnostics
Issue Number	2
Volume Number	13
Language	English
Publisher	Elsevier
Publisher Date	2011-03-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Molecular Biology Biological Markers Biopsy Kidney Chemistry Injuries Pathology Lupus Nephritis Collagen Type I Genetics Epidermal Growth Factor Metabolism Diagnosis Physiopathology Matrix Metalloproteinase 7 Polymerase Chain Reaction Prognosis Rna, Messenger Evaluation Studies Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Molecular Medicine Pathology and Forensic Medicine

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Molecular Markers of Injury in Kidney Biopsy Specimens of Patients with Lupus Nephritis

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Molecular Markers of Injury in Kidney Biopsy Specimens of Patients with Lupus Nephritis

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