Gene Expression Profiling Reveals Multiple Protective Influences of The
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Gene Expression Profiling Reveals Multiple Protective Influences of the Peptide α -Melanocyte-Stimulating Hormone in Experimental Heart Transplantation This information is current as of September 30, 2021. Gualtiero Colombo, Stefano Gatti, Flavia Turcatti, Andrea Sordi, Luigi R. Fassati, Ferruccio Bonino, James M. Lipton and Anna Catania J Immunol 2005; 175:3391-3401; ; doi: 10.4049/jimmunol.175.5.3391 Downloaded from http://www.jimmunol.org/content/175/5/3391 References This article cites 52 articles, 14 of which you can access for free at: http://www.jimmunol.org/ http://www.jimmunol.org/content/175/5/3391.full#ref-list-1 Why The JI? Submit online. • Rapid Reviews! 30 days* from submission to initial decision • No Triage! Every submission reviewed by practicing scientists by guest on September 30, 2021 • Fast Publication! 4 weeks from acceptance to publication *average Subscription Information about subscribing to The Journal of Immunology is online at: http://jimmunol.org/subscription Permissions Submit copyright permission requests at: http://www.aai.org/About/Publications/JI/copyright.html Email Alerts Receive free email-alerts when new articles cite this article. Sign up at: http://jimmunol.org/alerts The Journal of Immunology is published twice each month by The American Association of Immunologists, Inc., 1451 Rockville Pike, Suite 650, Rockville, MD 20852 Copyright © 2005 by The American Association of Immunologists All rights reserved. Print ISSN: 0022-1767 Online ISSN: 1550-6606. The Journal of Immunology Gene Expression Profiling Reveals Multiple Protective Influences of the Peptide ␣-Melanocyte-Stimulating Hormone in Experimental Heart Transplantation1 †,Luigi R. Fassati ء,Andrea Sordi ء,Stefano Gatti,† Flavia Turcatti ء,Gualtiero Colombo ءFerruccio Bonino,‡ James M. Lipton,§ and Anna Catania2 Novel therapies are sought to increase efficiency and survival of transplanted organs. Previous research on experimental heart transplantation showed that treatment with the anti-inflammatory peptide ␣-melanocyte-stimulating hormone (␣-MSH) prolongs allograft survival. The aim of the present research was to determine the molecular mechanism of this protective activity. Gene expression profile was examined in heart grafts removed on postoperative days 1 and 4 from rats treated with saline or the 4 7 synthetic ␣-MSH analog Nle DPhe (NDP)-␣-MSH. On postoperative day 1, the peptide induced expression of cytoskeleton Downloaded from proteins, intracellular kinases, transcription regulators, metallopeptidases, and protease inhibitors. Conversely, NDP-␣-MSH repressed immune, inflammatory, cell cycle, and protein turnover mediators. Later effects of ␣-MSH treatment included down- regulation of oxidative stress response and up-regulation of ion channels, calcium regulation proteins, phosphatidylinositol sig- naling system, and glycolipidic metabolism. NDP-␣-MSH exerted its effects on both Ag-dependent and -independent injury. The results indicate that NDP-␣-MSH preserves heart function through a broad effect on multiple pathways and suggest that the peptide could improve the outcome of organ transplantation in combination with immunosuppressive treatments. The Journal http://www.jimmunol.org/ of Immunology, 2005, 175: 3391–3401. cute rejection is a significant obstacle to successful or- soon be used clinically as truly novel anti-inflammatory/immuno- gan transplantation and its prevention is crucial for fa- modulatory compounds (4–8). Therefore, we designed research to A vorable clinical outcome. Although immunosuppressive determine the molecular mechanism underlying the protective ef- molecules can reduce rejection, they are associated with serious fects of the peptide. Using complement DNA arrays, an estab- side effects such as organ toxicity, increased viral infection, and lished technique for identification of pathways involved in trans- cancer (1). Because most of these harmful effects are dose-depen- plant rejection and its prevention (9), we found multiple protective dent, reduction of immunosuppressive drug treatment necessary to influences of ␣-MSH in experimental heart transplantation. by guest on September 30, 2021 prevent rejection is a major clinical target. As intragraft inflam- mation is known to promote and accelerate rejection (2), use of Materials and Methods anti-inflammatory compounds that enhance effectiveness of immu- Animals nosuppressive agents could be a successful strategy. Previous research on experimental heart transplantation showed Adult inbred Brown Norway and Lewis male rats (Charles River Labora- ␣ tories) weighing 200–300 g were used in the research. All animals received that treatment with the immunomodulatory peptide -melanocyte- care in compliance with the Principles of Laboratory Animal Care, formu- stimulating hormone (␣-MSH)3 prolongs survival and improves lated by the National Society of Medical Research, and the Guide for the allograft histopathology (3). Such beneficial effects were associ- Care and Use of Laboratory Animals, prepared by the National Academy ated with reduced intragraft expression of cytokines, chemokines, of Sciences and published by the National Institutes of Health (National Institutes of Health Publication No. 86–23). and adhesion molecules (3). ␣-MSH or its synthetic analogues may Surgical procedures Rats were anesthetized with a combination of 100 mg/kg ketamine and 6 *Division of Internal Medicine, †Division of Liver Transplantation, and ‡Scientific Direction, Fondazione Instituto di Ricovero e Cura a Carattere Scientifico (IRCCS) mg/kg xylazine injected i.p. During anesthesia, heart rate, ventilation rate, Ospedale Maggiore Policlinico, Mangiagalli e Regina Elena, Milano, Italy; and §Zen- and temperature were closely monitored. Brown Norway donor hearts were gen, Woodland Hills, CA 91367 transplanted into either the MHC incompatible Lewis rats (allografts) or into Brown Norway rats (isografts). The donor heart was transplanted het- Received for publication May 17, 2005. Accepted for publication June 24, 2005. erotopically into the abdominal cavity of the recipient using the technique The costs of publication of this article were defrayed in part by the payment of page described by Ono and Lindsey (10). All cardiac transplants had good initial charges. This article must therefore be hereby marked advertisement in accordance contractile function. Graft function was monitored by palpation through the with 18 U.S.C. Section 1734 solely to indicate this fact. abdominal wall twice daily. There were no early deaths nor graft rejections 1 This work was supported by Progetto di Ricerca “Meccanismi molecolari del danno during the study period. At each planned interval, rats were euthanized nel trapianto singenico e nell’allotrapianto”, Ospedale Maggiore di Milano, Italy, and with thoracotomy under ketamine and xylazine anesthesia. The abdomen Progetto di Ricerca Finalizzata “Strategie innovative per il trapianto di fegato was incised and the heart grafts were immediately removed. (SITF)”, Ministero della Salute, Italy. 2 Address correspondence and reprint requests to Dr. Anna Catania, Divisione di Treatments Medicina Interna, Pad. Granelli, Ospedale Maggiore Policlinico, Via F. Sforza 35, Milano 20122, Italy. E-mail address: [email protected] Each treatment group included five rats. Allograft recipients assigned to 4 7 3 ␣ ␣ active treatment received i.p. injections of 100 gofNleDPhe (NPD)- Abbreviations used in this paper: -MSH, -melanocyte stimulating hormone; ␣ NDP, Nle4DPhe7; POD, postoperative day; SAM, significance analysis of microar- -MSH (11) (kindly provided by Prof. P. Grieco, University of Naples, rays; FDR, false discovery rate; CT, cycle threshold; PKC, protein kinase C; Plc, Naples, Italy) dissolved in 0.5 ml of saline, every 12 h. Treatment was phospholipase C; Adcy6, adenylyl cyclase VI. started 1 h before transplantation and continued until sacrifice. Untreated Copyright © 2005 by The American Association of Immunologists, Inc. 0022-1767/05/$02.00 3392 EFFECT OF ␣-MSH ON GRAFT TRANSCRIPTIONAL PROFILE FIGURE 1. Histology of cardiac grafts. H&E staining (ϫ120) of a control nontransplanted heart (A); POD4 cardiac allograft from a saline-treated rat (B) and from an NDP-␣-MSH-treated animal (C). allograft recipients and isograft recipients received i.p. parallel injections sen samples for each allograft group and obtained consistent results (data of 0.5 ml of saline. not shown). Cardiac isografts were used to estimate heart injury caused by surgical procedures alone and were harvested on postoperative day (POD) 1. Al- Analysis of macroarray data Downloaded from lografts were harvested on POD 1 or 4. Two Brown Norway donor hearts Normalization. Phosphorimager scans were analyzed using AtlasImage were subjected to cold ischemia of similar duration and not transplanted. software (version 2.7; BD Biosciences/Clontech). A given gene was con- They served as nontransplanted controls. Heart grafts were sectioned coro- sidered to be detectable if its intensity was at least twice the global external nally. Two sections were snap-frozen in liquid nitrogen and stored at background of the array. The background level was subtracted from the Ϫ 80°C for RNA extraction. One section was fixed in 10% buffered for- intensity of each spot to generate the raw data for each gene. Raw data were malin and paraffin-embedded for light microscopy examination. normalized according to the sum of the intensities global normalization method. The normalization coefficient was obtained by dividing the global