PMID- 36619632 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230111 IS - 2296-858X (Print) IS - 2296-858X (Electronic) IS - 2296-858X (Linking) VI - 9 DP - 2022 TI - Long-term peritoneal dialysate exposure modulates expression of membrane complement regulators in human peritoneal mesothelial cells. PG - 972592 LID - 10.3389/fmed.2022.972592 [doi] LID - 972592 AB - The membrane complement regulators (CRegs) CD46, CD55, and CD59 are highly expressed on human peritoneal mesothelial cells. However, how mesothelial CRegs change according to the peritoneal dialysis (PD) history of patients has remained unclear. We therefore examined longitudinal changes in CRegs in primary cultured mesothelial cells from PD patients (human peritoneal mesothelial cells; HPMCs) and examined which components of PD fluid (PDF) affect CRegs in vitro. We measured levels of soluble C5b-9 in overnight-dwelling PDF in PD patients and also evaluated changes in CRegs expression on HPMCs collected from PDF using flow cytometry and polymerase chain reaction at a 1-year interval of PD therapy. We also evaluated changes in CReg expressions with stimulation by each component of PDF (glucose, lactic acid and pH) using the Met5A human mesothelial cell line. Levels of sC5b-9 in PDF decreased significantly during 1 year, while expressions of CD46 and CD59 proteins and mRNAs increased significantly in HPMCs during 1 year. Analyzing Met-5A cells, we observed that expressions of the three CRegs were increased by glucose and lactic acid in a concentration-dependent manner, but conversely that expressions of CRegs were decreased by lower pH stimulation. History of PD might influence expression of CRegs by HPMCs through properties of PDF such as glucose, lactic acid, and pH. These results suggest that mesothelial cells may alter expression of CRegs for the purpose of protecting the peritoneum and the presence of PDF might affect peritoneal homeostasis associated with the complement system. CI - Copyright (c) 2022 Kobayashi, Ozeki, Kim, Imai, Kojima, Iguchi, Fukui, Suzuki, Suzuki, Maruyama, Ito and Mizuno. FAU - Kobayashi, Kazuma AU - Kobayashi K AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Ozeki, Toshikazu AU - Ozeki T AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Kim, Hangsoo AU - Kim H AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. AD - Department of Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Imai, Masaki AU - Imai M AD - Department of Immunology, Nagoya City University Graduate School of Medicine, Nagoya, Japan. FAU - Kojima, Hiroshi AU - Kojima H AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. AD - Department of Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Iguchi, Daiki AU - Iguchi D AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Fukui, Sosuke AU - Fukui S AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. AD - Department of Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Suzuki, Masafumi AU - Suzuki M AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Suzuki, Yasuhiro AU - Suzuki Y AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. AD - Department of Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Maruyama, Shoichi AU - Maruyama S AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. FAU - Ito, Yasuhiko AU - Ito Y AD - Department of Nephrology and Rheumatology, Aichi Medical University, Nagakute, Japan. FAU - Mizuno, Masashi AU - Mizuno M AD - Department of Nephrology, Nagoya University Graduate School of Medicine, Nagoya, Japan. AD - Department of Renal Replacement Therapy, Nagoya University Graduate School of Medicine, Nagoya, Japan. LA - eng PT - Journal Article DEP - 20221220 PL - Switzerland TA - Front Med (Lausanne) JT - Frontiers in medicine JID - 101648047 PMC - PMC9815709 OTO - NOTNLM OT - complement OT - complement regulator OT - mesothelial cells OT - peritoneal dialysate OT - peritoneal dialysis COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/01/10 06:00 MHDA- 2023/01/10 06:01 PMCR- 2022/12/20 CRDT- 2023/01/09 03:55 PHST- 2022/06/18 00:00 [received] PHST- 2022/11/28 00:00 [accepted] PHST- 2023/01/09 03:55 [entrez] PHST- 2023/01/10 06:00 [pubmed] PHST- 2023/01/10 06:01 [medline] PHST- 2022/12/20 00:00 [pmc-release] AID - 10.3389/fmed.2022.972592 [doi] PST - epublish SO - Front Med (Lausanne). 2022 Dec 20;9:972592. doi: 10.3389/fmed.2022.972592. eCollection 2022.