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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Medicine+(Baltimore)
2016 ; 95
(3
): e2520
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Pentraxin 3 Is Closely Associated With Tubulointerstitial Injury in Lupus
Nephritis: A Large Multicenter Cross-Sectional Study
#MMPMID26817892
Pang Y
; Tan Y
; Li Y
; Zhang J
; Guo Y
; Guo Z
; Zhang C
; Yu F
; Zhao MH
Medicine (Baltimore)
2016[Jan]; 95
(3
): e2520
PMID26817892
show ga
Lupus nephritis always elicits immune inflammatory tissue damages in kidney.
Pentraxin 3 (PTX3), mainly produced at inflammatory sites, is known to be
involved in the regulation of the innate immunity system. The aim of this study
was to investigate the serum and urine levels of PTX3, and the expression of PTX3
in renal tissues in lupus nephritis patients from a large Chinese cohort.The
study used cross-sectional survey and 288 active lupus nephritis patients,
including discovery cohort and validation cohort, 115 systemic lupus
erythematosus (SLE) patients without clinical renal involvement and 46 healthy
controls were enrolled. Serum and urine PTX3 were screened by enzyme-linked
immunosorbent assay (ELISA). The renal deposition of PTX3 was detected by
immunohistochemistry and immunofluorescence.The average level of serum PTX3 in
the discovery cohort of lupus nephritis was significantly higher than that in
nonrenal involvement SLE group and normal controls (P?0.001, P?0.001,
respectively), which was confirmed by the validation cohort. Serum PTX3 levels of
15 lupus nephritis patients in remission decreased significantly compared with
that in active phase. Serum PTX3 levels were significantly higher in patients
with hematuria (P?=?0.014), leucocyturia (P?=?0.002), acute renal failure
(P?=?0.001), and nephrotic syndrome (P?=?0.036). There were significant
correlations between serum PTX3 levels and Systemic Lupus Erythematosus Disease
Activity Index (SLEDAI) scores, serum creatinine value, renal pathological
activity indices, and serum complement 3 (C3) in active lupus nephritis patients.
The urinary PTX3 levels were significantly higher in active lupus nephritis
patients compared with patients in remission and normal controls (P?=?0.011,
P?=?0.008, respectively). There were significant associations between urinary
PTX3 levels and multiple indices of tubulointerstitial lesions, including urinary
KIM-1 (r?=?0.368, P?=?0.016), neutrophil gelatinase-associated lipocalin (NGAL)
(r?=?0.320, P?=?0.039), microalbumin (r?=?0.621, P?=?0.003), transferring
(r?=?0.451, P?=?0.040) levels and renal pathological indices scores, especially
interstitial inflammation (r?=?0.349, P?=?0.025) in active lupus nephritis
patients. A significant correlation was found between serum and urine PTX3 levels
(r?=?0.431, P?=?0.006). PTX3 staining was mainly observed in tubulointerstitial
areas of patients with lupus nephritis, and immunofluorescence study showed that
PTX3 could colocalize with fibroblast in interstitium.Circulating and local PTX3
levels were significantly increased in patients with active lupus nephritis and
might be a biomarker for the disease progression, especially of
tubulointerstitial injury.