RGD Reference Report - Molecular markers of injury in kidney biopsy specimens of patients with lupus nephritis. - Rat Genome Database

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

Authors: Reich, HN  Landolt-Marticorena, C  Boutros, PC  John, R  Wither, J  Fortin, PR  Yang, S  Scholey, JW  Herzenberg, AM 
Citation: Reich HN, etal., J Mol Diagn. 2011 Mar;13(2):143-51.
RGD ID: 5688301
Pubmed: PMID:21354048   (View Abstract at PubMed)
PMCID: PMC3128621   (View Article at PubMed Central)
DOI: DOI:10.1016/j.jmoldx.2010.10.005   (Journal Full-text)

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.




  
Object Symbol
Species
Term
Qualifier
Evidence
With
Notes
Source
Original Reference(s)
COL1A1Humanlupus nephritis  IEP  RGD 
Col1a1Ratlupus nephritis  ISOCOL1A1 (Homo sapiens) RGD 
Col1a1Mouselupus nephritis  ISOCOL1A1 (Homo sapiens) RGD 
EGFHumanlupus nephritis  IEP  RGD 
EgfRatlupus nephritis  ISOEGF (Homo sapiens) RGD 
EgfMouselupus nephritis  ISOEGF (Homo sapiens) RGD 


Genes (Rattus norvegicus)
Col1a1  (collagen type I alpha 1 chain) Egf  (epidermal growth factor)

Genes (Mus musculus)
Col1a1  (collagen, type I, alpha 1) Egf  (epidermal growth factor)

Genes (Homo sapiens)
COL1A1  (collagen type I alpha 1 chain) EGF  (epidermal growth factor)