PMID- 21703396 OWN - NLM STAT- MEDLINE DCOM- 20111028 LR - 20211020 IS - 1525-2191 (Electronic) IS - 0002-9440 (Print) IS - 0002-9440 (Linking) VI - 179 IP - 1 DP - 2011 Jul TI - Suppression of chronic damage in renal allografts by Liver X receptor (LXR) activation relevant contribution of macrophage LXRalpha. PG - 92-103 LID - 10.1016/j.ajpath.2011.03.019 [doi] AB - Liver X receptors (LXR)-alpha,beta regulate intracellular cholesterol homeostasis and inhibit inflammatory gene expression. We studied the effects of the LXRalpha,beta-agonist GW3965 on acute and chronic organ damage in the F344-LEW rat kidney transplantation model. In addition, to gain LXR isoform and cell-specific insights BALB/c kidneys were transplanted into mice with macrophage overexpression of LXRalpha (mLXRalpha-tg) and evaluated 7 and 42 days after transplantation. After 56 days GW3965 improved significantly function and morphology of rat kidney allografts by substantial reduction of mononuclear cell infiltrate and fibrosis; in vitro GW3965 reduced inflammatory activity of bone marrow-derived macrophages (BMDMs) and alloreactivity of T cells. Kidneys transplanted into mLXRalpha-tg mice were also protected from development of chronic allograft dysfunction. Similarly to GW3965-activated BMDMs, mLXRalpha-tg macrophages secreted significantly less monocyte chemoattractant protein 1 and macrophage inflammatory protein 1beta. Interestingly, 7 days after transplantation, when the total number of intragraft macrophages did not differ, evidently more arginase 1- and mannose receptor C type 1-positive cells were found in LXR rat and mice kidney allografts; in vitro both LXR activation by GW3965 and mLXRalpha overexpression accentuated the induction of alternative activation of BMDMs by IL-4/IL-13, suggesting an additional mechanism by LXRs to prevent graft damage. The results highlight the relevance of macrophage LXRalpha in allograft rejection and prevention of fibrosis. CI - Copyright (c) 2011 American Society for Investigative Pathology. Published by Elsevier Inc. All rights reserved. FAU - Kiss, Eva AU - Kiss E AD - Department of Cellular and Molecular Pathology, German Cancer Research Center, Heidelberg, Germany. FAU - Popovic, Zoran AU - Popovic Z FAU - Bedke, Jens AU - Bedke J FAU - Wang, Shijun AU - Wang S FAU - Bonrouhi, Mahnaz AU - Bonrouhi M FAU - Gretz, Norbert AU - Gretz N FAU - Stettner, Paula AU - Stettner P FAU - Teupser, Daniel AU - Teupser D FAU - Thiery, Joachim AU - Thiery J FAU - Porubsky, Stefan AU - Porubsky S FAU - Adams, Judith AU - Adams J FAU - Grone, Hermann-Josef AU - Grone HJ LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20110505 PL - United States TA - Am J Pathol JT - The American journal of pathology JID - 0370502 RN - 0 (Benzoates) RN - 0 (Benzylamines) RN - 0 (Chemokines) RN - 0 (Cytokines) RN - 0 (GW 3965) RN - 0 (Ligands) RN - 0 (Liver X Receptors) RN - 0 (Nr1h3 protein, mouse) RN - 0 (Nr1h3 protein, rat) RN - 0 (Orphan Nuclear Receptors) RN - 0 (RNA, Messenger) SB - IM MH - Animals MH - Benzoates/*pharmacology MH - Benzylamines/*pharmacology MH - Blotting, Western MH - Chemokines/metabolism MH - Chronic Disease MH - Cytokines/metabolism MH - Fibrosis/metabolism/*prevention & control MH - Flow Cytometry MH - Graft Rejection/metabolism/*prevention & control MH - Immunoenzyme Techniques MH - Kidney Transplantation MH - Ligands MH - Liver X Receptors MH - Macrophages/*drug effects/*metabolism MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Mice, Transgenic MH - Orphan Nuclear Receptors/agonists/*metabolism MH - RNA, Messenger/genetics MH - Rats MH - Rats, Inbred F344 MH - Rats, Inbred Lew MH - Reverse Transcriptase Polymerase Chain Reaction MH - Transplantation, Homologous PMC - PMC3123851 EDAT- 2011/06/28 06:00 MHDA- 2011/10/29 06:00 PMCR- 2012/07/01 CRDT- 2011/06/28 06:00 PHST- 2010/10/08 00:00 [received] PHST- 2011/02/22 00:00 [revised] PHST- 2011/03/17 00:00 [accepted] PHST- 2011/06/28 06:00 [entrez] PHST- 2011/06/28 06:00 [pubmed] PHST- 2011/10/29 06:00 [medline] PHST- 2012/07/01 00:00 [pmc-release] AID - S0002-9440(11)00335-X [pii] AID - AJPA354 [pii] AID - 10.1016/j.ajpath.2011.03.019 [doi] PST - ppublish SO - Am J Pathol. 2011 Jul;179(1):92-103. doi: 10.1016/j.ajpath.2011.03.019. Epub 2011 May 5.