CD147 expression in peritoneal injury.

Abstract:

BACKGROUND:Peritoneal injury is an important cause of technical failure of long-term peritoneal dialysis (PD). Encapsulating peritoneal sclerosis (EPS) is a severe complication of long-term PD with potentially life threatening consequences. CD147 is a glycoprotein with diverse functions including modulation of extracellular matrix via induction of matrix metalloproteinases, cell adhesion, and regulation of immune reactions. We hypothesized that CD 147 plays a role in the peritoneal cavity. METHODS:In this retrospective study, we localized CD147 by immunohistochemistry in peritoneal biopsies from uremic patients not on PD (n = 8), on PD without signs of EPS (n = 7), and in biopsies in patients with the diagnosis of EPS (n = 7). Double immunofluorescence was used to co-localize α-smooth-muscle actin (α-SMA) and CD147 in selected biopsies from each group. Expression was scored semi-quantitatively. RESULTS:In biopsies from uremic controls, CD147 was prominently expressed in mesothelial cells, focally between fat cells and by some perivascular cells. In patients on PD, a similar distribution was present (although mesothelium was rarely conserved), with some focal accentuation. In EPS, layers of fibroblastic cells were positive for CD147. EPS biopsies demonstrated a significantly higher score in a blinded evaluation, compared to uremic patients. Cells expressing CD147 were α-SMA positive myofibroblasts as demonstrated by double immunofluorescence. Mean CD147 scores did not differ between patients with different transporter status. CONCLUSIONS:This is the first study demonstrating CD147 on a major part of fibroblastic cells in EPS. Future studies need to address the role of these cells in this severe complication of long-term PD.

journal_name

Clin Exp Nephrol

authors

Seeger H,Latus J,Kitterer D,Alscher MD,Biegger D,Chen J,Edenhofer I,Wüthrich RP,Segerer S

doi

10.1007/s10157-017-1390-0

subject

Has Abstract

pub_date

2017-12-01 00:00:00

pages

1097-1104

issue

6

eissn

1342-1751

issn

1437-7799

pii

10.1007/s10157-017-1390-0

journal_volume

21

pub_type

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