PMID- 28955891 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200930 IS - 2405-5808 (Print) IS - 2405-5808 (Electronic) IS - 2405-5808 (Linking) VI - 7 DP - 2016 Sep TI - RP S19 C-terminal peptide trimer acts as a C5a receptor antagonist. PG - 70-76 LID - 10.1016/j.bbrep.2016.05.006 [doi] AB - We have demonstrated that ribosomal protein S19 (RP S19) polymer, when crosslinked between Lys122 and Gln137 by activated coagulation factor XIII, acts as a C5a receptor (C5aR) antagonist/agonist. Based on experimental data obtained using RP S19 analog peptide and recombinant protein monomer, we suggested that L(131)DR, I(134)AGQVAAAN and K(143)KH moieties in the RP S19 C-terminus act in, respectively, C5aR binding, penetration of the plasma membrane, and interaction with either an apoptosis-inducing molecule in neutrophils (delta lactoferrin) or a calcium channel-activating molecule (annexin A3) to induce the p38 MAPK pathway in macrophages. Recently, we observed RP S19 trimer in serum. To study the effects of this RP S19 trimer on C5aR, we prepared mutant RP S19 C-terminal peptide (RP S19(122-145)) dimer and trimer, and examined their chemotactic activities and signal transduction pathways in human C5aR-overexpressing squamous cell carcinoma HSC-1 (HSC-1(C5aR)) cells using 24 trans-well chamber and western blotting assays, respectively. HSC-1(C5aR) cells were attracted by RP S19(122-145) dimer and vice versa by RP S19(122-145) trimer. The RP S19(122-145) dimer-induced attraction was competitively blocked by pre-treatment with RP S19(122-145) trimer. Moreover, RP S19(122-145) trimer-induced p38 MAPK phosphorylation was stronger than RP S19(122-145) dimer-induced p38 MAPK phosphorylation. RP S19(122-145) trimer appeared to act as a C5aR antagonist. The agonistic and antagonistic effects of RP S19(122-145) dimers and trimers were reflected by monocytic, THP-1-derived macrophage-like cells. Unlike the C5aR agonist C5a, which acts at the inflammation phase of acute inflammation, RP S19 trimer might act as a C5aR antagonist at the resolution phase. FAU - Nishiura, Hiroshi AU - Nishiura H AD - Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan. FAU - Kawakami, Toru AU - Kawakami T AD - Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan. FAU - Kawabe, Mutsuki AU - Kawabe M AD - Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan. FAU - Kato-Kogoe, Nahoko AU - Kato-Kogoe N AD - Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan. FAU - Yamada, Naoko AU - Yamada N AD - Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan. FAU - Nakasho, Keiji AU - Nakasho K AD - Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan. FAU - Yamanegi, Koji AU - Yamanegi K AD - Department of Pathology, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan. LA - eng PT - Journal Article DEP - 20160510 PL - Netherlands TA - Biochem Biophys Rep JT - Biochemistry and biophysics reports JID - 101660999 PMC - PMC5613253 OTO - NOTNLM OT - ANXA3, annexin A3 OT - Antagonist OT - C5a receptor OT - C5aR, C5a receptor OT - ERK1/2, extracellular signal-regulated protein kinases 1/2 OT - HSC-1C5aR, C5aR-overexpressing human squamous cell carcinoma HSC-1 OT - Neutrophils OT - P38 MAPK OT - RP S19, S19 ribosomal protein OT - RP S19122-145, mutant RP S19122-145 peptide OT - Ribosomal protein S19 OT - Trimer OT - p38 MAPK, p38 mitogen-activated protein kinase OT - deltaLf, delta lactoferrin EDAT- 2016/05/10 00:00 MHDA- 2016/05/10 00:01 PMCR- 2016/05/10 CRDT- 2017/09/29 06:00 PHST- 2016/02/28 00:00 [received] PHST- 2016/04/30 00:00 [revised] PHST- 2016/05/09 00:00 [accepted] PHST- 2017/09/29 06:00 [entrez] PHST- 2016/05/10 00:00 [pubmed] PHST- 2016/05/10 00:01 [medline] PHST- 2016/05/10 00:00 [pmc-release] AID - S2405-5808(16)30061-9 [pii] AID - 10.1016/j.bbrep.2016.05.006 [doi] PST - epublish SO - Biochem Biophys Rep. 2016 May 10;7:70-76. doi: 10.1016/j.bbrep.2016.05.006. eCollection 2016 Sep.