Serum levels of DNAJB9 are elevated in fibrillary glomerulonephritis patients.

Abstract:

:Fibrillary glomerulonephritis (FGN) is a rare glomerular disease. Kidney biopsy is required to establish the diagnosis. Recent studies have identified abundant glomerular deposition of DNAJB9 as a unique histological marker of FGN. We developed an immunoprecipitation-based multiple reaction monitoring method to measure serum levels of DNAJB9. We detected a 4-fold higher abundance of serum DNAJB9 in FGN patients when compared to controls, including patients with other glomerular diseases. Serum DNAJB9 levels were also negatively associated with estimated glomerular filtration rate in patients with FGN. Serum DNAJB9 levels accurately predicted FGN with moderate sensitivity (67%) and with high specificity (98%) and positive and negative predictive value (89% and 95%, respectively). A receiver operating curve analysis demonstrated an AUC of 0.958. These results suggest that serum levels of DNAJB9 could be a valuable marker to predict FGN, with the potential to complement kidney biopsy for the diagnosis of FGN.

journal_name

Kidney Int

journal_title

Kidney international

authors

Nasr SH,Dasari S,Lieske JC,Benson LM,Vanderboom PM,Holtz-Heppelmann CJ,Giesen CD,Snyder MR,Erickson SB,Fervenza FC,Leung N,Kurtin PJ,Alexander MP

doi

10.1016/j.kint.2019.01.024

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

1269-1272

issue

5

eissn

0085-2538

issn

1523-1755

pii

S0085-2538(19)30166-8

journal_volume

95

pub_type

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