PMID- 25725314 OWN - NLM STAT- MEDLINE DCOM- 20150511 LR - 20171116 IS - 1872-9142 (Electronic) IS - 0161-5890 (Linking) VI - 65 IP - 2 DP - 2015 Jun TI - Expression of membrane complement regulators, CD46, CD55 and CD59, in mesothelial cells of patients on peritoneal dialysis therapy. PG - 302-9 LID - S0161-5890(15)00045-0 [pii] LID - 10.1016/j.molimm.2015.02.005 [doi] AB - We investigated the expression of membrane complement regulators (CRegs), CD46, CD55 and CD59 in human mesothelial cells, and correlated with clinical background and level of complement (C) activation products in peritoneal dialysis (PD) fluids (PDF) to clarify influence of the C activation system in PD patients. Expression of CRegs was assessed on primary cultures of mesothelial cells (HPMC) harvested from PD fluid of 31 PD patients. Because expression of CD55 but not CD46 and CD59 in mesothelial cells was significantly correlated to value of dialysate-to-plasma creatinine concentration ratio (D/P Cre) (p<0.005) as an indicator of peritoneal function, we focused on analysis of CD55 expression of HPMCs in comparison with levels of C activation products in the PDF of the PD patients, and their background factors. When comparing expression of the CRegs between systemic neutrophils and HPMC, no correlation was observed, supporting that change of CRegs' expression in HPMC was independently occurring in the peritoneum. Expression of CD55 protein in HPMC was closely correlated with expression at the mRNA level (p<0.0001) and was inversely correlated with levels of sC5b-9 (p<0.05), but not C3, C4, IL6 and CA125 in the PDF. Complications of diabetes, usage of icodextrin and residual renal function were not correlated with change of CD55 expression in HPMCs. Our data show that the process of PD therapy modifies expression of CD55 on peritoneal mesothelium and triggers local C activation. These findings support efforts to modify PD therapy to limit effects on activation and regulation of the C system. CI - Copyright (c) 2015 Elsevier Ltd. All rights reserved. FAU - Sei, Yumi AU - Sei Y AD - Division of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Mizuno, Masashi AU - Mizuno M AD - Division of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan; Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan. Electronic address: mmizu@med.nagoya-u.ac.jp. FAU - Suzuki, Yasuhiro AU - Suzuki Y AD - Division of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan; Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Imai, Masaki AU - Imai M AD - Immunology, Nagoya City University Graduate School of Medicine, Nagoya, Japan. FAU - Higashide, Keiko AU - Higashide K AD - Division of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Harris, Claire L AU - Harris CL AD - Complement Biology Group, Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK. FAU - Sakata, Fumiko AU - Sakata F AD - Division of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan; Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Iguchi, Daiki AU - Iguchi D AD - Division of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Fujiwara, Michitaka AU - Fujiwara M AD - Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Kodera, Yasuhiro AU - Kodera Y AD - Department of Gastroenterological Surgery (Surgery II), Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Maruyama, Shoichi AU - Maruyama S AD - Division of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Matsuo, Seiichi AU - Matsuo S AD - Division of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Ito, Yasuhiko AU - Ito Y AD - Division of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan; Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan. LA - eng PT - Clinical Trial PT - Journal Article PT - Multicenter Study PT - Research Support, Non-U.S. Gov't DEP - 20150225 PL - England TA - Mol Immunol JT - Molecular immunology JID - 7905289 RN - 0 (CA-125 Antigen) RN - 0 (CD46 protein, human) RN - 0 (CD56 Antigen) RN - 0 (CD59 Antigens) RN - 0 (IL6 protein, human) RN - 0 (Interleukin-6) RN - 0 (MUC16 protein, human) RN - 0 (Membrane Cofactor Protein) RN - 0 (Membrane Proteins) RN - 0 (NCAM1 protein, human) RN - 101754-01-2 (CD59 protein, human) RN - 9007-36-7 (Complement System Proteins) SB - IM MH - CA-125 Antigen/immunology MH - CD56 Antigen/*immunology MH - CD59 Antigens/*immunology MH - Complement Activation MH - Complement System Proteins/immunology MH - Epithelial Cells/*immunology/pathology MH - Epithelium/immunology/pathology MH - Female MH - Gene Expression Regulation/*immunology MH - Humans MH - Interleukin-6/immunology MH - Male MH - Membrane Cofactor Protein/*immunology MH - Membrane Proteins/immunology MH - *Peritoneal Dialysis OTO - NOTNLM OT - CD55 OT - Complement OT - D/P creatinine OT - Membrane complement regulators OT - Peritoneal dialysis EDAT- 2015/03/01 06:00 MHDA- 2015/05/12 06:00 CRDT- 2015/03/01 06:00 PHST- 2014/10/21 00:00 [received] PHST- 2015/01/31 00:00 [revised] PHST- 2015/02/05 00:00 [accepted] PHST- 2015/03/01 06:00 [entrez] PHST- 2015/03/01 06:00 [pubmed] PHST- 2015/05/12 06:00 [medline] AID - S0161-5890(15)00045-0 [pii] AID - 10.1016/j.molimm.2015.02.005 [doi] PST - ppublish SO - Mol Immunol. 2015 Jun;65(2):302-9. doi: 10.1016/j.molimm.2015.02.005. Epub 2015 Feb 25.