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Suzuki H, Mitsunaga S, Ikeda M, Aoyama T, Yoshizawa K, Yamaguchi M, Suzuki M, Narita M, Kawasaki T, Ochiai A. Interleukin 6/gp130 axis promotes neural invasion in pancreatic cancer. Cancer Med 2022; 11:5001-5012. [PMID: 35578571 PMCID: PMC9761092 DOI: 10.1002/cam4.4823] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 08/14/2021] [Accepted: 08/24/2021] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Nerve invasion (N-inv) is an important prognostic factor in pancreatic ductal adenocarcinoma (PDAC). Elucidation of circulating N-inv stimulators could provide deeper insights and novel perspectives for PDAC therapy. The interleukin (IL)-6/gp130 axis was evaluated in this study as a candidate N-inv stimulator. METHODS A human pancreatic cancer (PC) cell, Capan-1, was confirmed to have the stimulant activity of IL-6/gp130 axis through the evaluation of mRNA, cell surface protein and intracellular protein levels and chemotaxis and wound healing assay. The upregulation of IL-6/gp130 axis was evaluated using tumor-derived IL-6 level and intratumoral pSTAT3 expression in N-inv of murine sciatic nerves by intraneural injection of Capan-1 cell (N-inv model) and using resected pancreatic cancer tissue and clinical data from 46 PDAC patients. RESULTS mRNA and protein expressions of IL-6 and IL-6 receptor were found in whole cell lysate and condition medium from PC cell. Cell surface protein expression of gp130 were clearly detected on PC cell. IL-6 promoted migration and chemotaxis of PC cell. Serum IL-6 and tumoral IL-6 mRNA levels in N-inv model mice were significantly higher than those in subcutaneous tumor mice (p = 0.004 and p = 0.002, respectively). Silencing of IL-6 and gp130 on PC cell and administration of an anti-IL-6 receptor antibody, tocilizumab, suppressed N-inv, compared to each control (p = 0.070, p = 0.118 and p = 0.122, respectively). In PDAC patients, the high-N-inv group showed poor prognosis (p =0.059) and elevated serum levels of IL-6 and C-reactive protein, synthesis of which is promoted by IL-6, compared to those in the low-N-inv group (p = 0.006 and p = 0.075, respectively). Tumoral gp130 expression at N-inv was higher than that in the primary pancreatic tumor (p = 0.026). CONCLUSION Biological activity of IL-6/gp130 axis promoted N-inv in murine model and was upregulated in PDAC patients with severe N-inv. This study is the first evidence that the IL-6/gp130 axis offers a potential therapeutic target in PDAC with N-inv.
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Affiliation(s)
- Hidetaka Suzuki
- Division of Biomarker DiscoveryExploratory Oncology Research & Clinical Trial Center, National Cancer CenterKashiwaJapan
- Laboratory of PharmacotherapeuticsFaculty of Pharmaceutical Science, Tokyo University of ScienceTokyoJapan
- Department of PharmacyNational Cancer Center Hospital EastKashiwaJapan
| | - Shuichi Mitsunaga
- Division of Biomarker DiscoveryExploratory Oncology Research & Clinical Trial Center, National Cancer CenterKashiwaJapan
- Department of Hepatobiliary and Pancreatic OncologyNational Cancer Center Hospital EastKashiwaJapan
| | - Masafumi Ikeda
- Department of Hepatobiliary and Pancreatic OncologyNational Cancer Center Hospital EastKashiwaJapan
| | - Takao Aoyama
- Laboratory of PharmacotherapeuticsFaculty of Pharmaceutical Science, Tokyo University of ScienceTokyoJapan
| | - Kazumi Yoshizawa
- Laboratory of Pharmacology and TherapeuticsFaculty of Pharmaceutical Science, Tokyo University of ScienceTokyoJapan
| | - Masayuki Yamaguchi
- Division of Functional ImagingExploratory Oncology Research & Clinical Trial Center, National Cancer CenterKashiwaJapan
| | - Masami Suzuki
- Division of Cancer Genome Informatics MedicineGraduate School of Medicine, Osaka UniversityOsakaJapan
| | - Minoru Narita
- School of Pharmacy and Pharmaceutical SciencesHoshi UniversityTokyoJapan
| | | | - Atsushi Ochiai
- Division of Biomarker DiscoveryExploratory Oncology Research & Clinical Trial Center, National Cancer CenterKashiwaJapan
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Abstract
Although pancreatic cancer remains to be a leading cause of cancer-related deaths in many industrialized countries, there have been major advances in research over the past two decades that provided a detailed insight into the molecular and developmental processes that govern the genesis of this highly malignant tumor type. There is a continuous need for the development and analysis of preclinical and genetically engineered pancreatic cancer models to study the biological significance of new molecular targets that are identified using various genome-wide approaches and to better understand the mechanisms by which they contribute to pancreatic cancer onset and progression. Following an introduction into the etiology of pancreatic cancer, the molecular subtypes, and key signaling pathways, this review provides an overview of the broad spectrum of models for pancreatic cancer research. In addition to conventional and patient-derived xenografting, this review highlights major milestones in the development of chemical carcinogen-induced and genetically engineered animal models to study pancreatic cancer. Particular emphasis was placed on selected research findings of ligand-controlled tumor models and current efforts to develop genetically engineered strains to gain insight into the biological functions of genes at defined developmental stages during cancer initiation and metastatic progression.
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Jiao S, Subudhi SK, Aparicio A, Ge Z, Guan B, Miura Y, Sharma P. Differences in Tumor Microenvironment Dictate T Helper Lineage Polarization and Response to Immune Checkpoint Therapy. Cell 2020; 179:1177-1190.e13. [PMID: 31730856 DOI: 10.1016/j.cell.2019.10.029] [Citation(s) in RCA: 274] [Impact Index Per Article: 54.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 07/23/2019] [Accepted: 10/23/2019] [Indexed: 12/11/2022]
Abstract
Immune checkpoint therapy (ICT) shows encouraging results in a subset of patients with metastatic castration-resistant prostate cancer (mCRPC) but still elicits a sub-optimal response among those with bone metastases. Analysis of patients' bone marrow samples revealed increased Th17 instead of Th1 subsets after ICT. To further evaluate the different tumor microenvironments, we injected mice with prostate tumor cells either subcutaneously or intraosseously. ICT in the subcutaneous CRPC model significantly increases intra-tumoral Th1 subsets and improves survival. However, ICT fails to elicit an anti-tumor response in the bone CRPC model despite an increase in the intra-tumoral CD4 T cells, which are polarized to Th17 rather than Th1 lineage. Mechanistically, tumors in the bone promote osteoclast-mediated bone resorption that releases TGF-β, which restrains Th1 lineage development. Blocking TGF-β along with ICT increases Th1 subsets and promotes clonal expansion of CD8 T cells and subsequent regression of bone CRPC and improves survival.
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Affiliation(s)
- Shiping Jiao
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center UTHealth, Houston, TX 77030, USA
| | - Sumit K Subudhi
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Ana Aparicio
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Zhongqi Ge
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Baoxiang Guan
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Yuji Miura
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA
| | - Padmanee Sharma
- Department of Genitourinary Medical Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA; Graduate School of Biomedical Sciences, The University of Texas MD Anderson Cancer Center UTHealth, Houston, TX 77030, USA.
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Pilny E, Smolarczyk R, Jarosz-Biej M, Hadyk A, Skorupa A, Ciszek M, Krakowczyk Ł, Kułach N, Gillner D, Sokół M, Szala S, Cichoń T. Human ADSC xenograft through IL-6 secretion activates M2 macrophages responsible for the repair of damaged muscle tissue. Stem Cell Res Ther 2019; 10:93. [PMID: 30867059 PMCID: PMC6417195 DOI: 10.1186/s13287-019-1188-y] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 01/25/2019] [Accepted: 02/25/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Adipose-derived mesenchymal stromal cells (ADSCs) are multipotent stromal cells. The cells secrete a number of cytokines and growth factors and show immunoregulatory and proangiogenic properties. Their properties may be used to repair damaged tissues. The aim of our work is to explain the muscle damage repair mechanism with the utilization of the human adipose-derived mesenchymal stromal cells (hADSCs). METHODS For the hADSCs isolation, we used the subcutaneous adipose tissue collected during the surgery. The murine hind limb ischemia was used as a model. The unilateral femoral artery ligation was performed on 10-12-week-old male C57BL/6NCrl and NOD SCID mice. The mice received PBS- (controls) or 1 × 106 hADSCs. One, 3, 7, 14 and 21 days after the surgery, we collected the gastrocnemius muscles for the immunohistochemical analysis. The results were analyzed with relevant tests using the Statistica software. RESULTS The retention time of hADSCs in the limb lasted about 14 days. In the mice receiving hADSCs, the improvement in the functionality of the damaged limb occurred faster than in the control mice. More new blood vessels were formed in the limbs of the mice receiving hADSCs than in limbs of the control mice. hADSCs also increased the infiltration of the macrophages with the M2 phenotype (7-AAD-/CD45+/F4/80+/CD206+) into the ischemic limbs. hADSCs introduced into the limb of mice secreted interleukin-6. This cytokine stimulates the emergence of the proangiogenic M2 macrophages, involved, among others, in the repair of a damaged tissue. Both macrophage depletion and IL-6 blockage suppressed the therapeutic effect of hADSCs. In the mice treated with hADSCs and liposomes with clodronate (macrophages depletion), the number of capillaries formed was lower than in the mice treated with hADSCs alone. Administration of hADSCs to the mice that received siltuximab (human IL-6 blocker) did not cause an influx of the M2 macrophages, and the number of capillaries formed was at the level of the control group, as in contrast to the mice that received only the hADSCs. CONCLUSIONS The proposed mechanism for the repair of the damaged muscle using hADSCs is based on the activity of IL-6. In our opinion, the cytokine, secreted by the hADSCs, stimulates the M2 macrophages responsible for repairing damaged muscle and forming new blood vessels.
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Affiliation(s)
- Ewelina Pilny
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie Institute - Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland.,Department of Organic Chemistry, Biochemistry and Biotechnology, Silesian University of Technology, Księdza Marcina Strzody 9 Street, 44-100, Gliwice, Poland
| | - Ryszard Smolarczyk
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie Institute - Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland
| | - Magdalena Jarosz-Biej
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie Institute - Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland
| | - Alina Hadyk
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie Institute - Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland
| | - Agnieszka Skorupa
- Department of Medical Physics Maria Sklodowska-Curie Institute -Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland
| | - Mateusz Ciszek
- Department of Medical Physics Maria Sklodowska-Curie Institute -Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland
| | - Łukasz Krakowczyk
- Department of Oncologic and Reconstructive Surgery, Maria Sklodowska-Curie Institute -Oncology Center, Wybrzeże Armii Krajowej 15 Street, 44-101 Gliwice Branch, Gliwice, Poland
| | - Natalia Kułach
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie Institute - Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland.,Department of Animal Physiology and Ecotoxicology, Faculty of Biology and Environmental Protection, University of Silesia, Bankowa 12 Street, 40-007, Katowice, Poland
| | - Danuta Gillner
- Department of Organic Chemistry, Biochemistry and Biotechnology, Silesian University of Technology, Księdza Marcina Strzody 9 Street, 44-100, Gliwice, Poland
| | - Maria Sokół
- Department of Medical Physics Maria Sklodowska-Curie Institute -Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland
| | - Stanisław Szala
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie Institute - Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland
| | - Tomasz Cichoń
- Center for Translational Research and Molecular Biology of Cancer, Maria Sklodowska-Curie Institute - Oncology Center, Gliwice Branch, Wybrzeże Armii Krajowej 15 Street, 44-101, Gliwice, Poland.
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Eichten A, Su J, Adler AP, Zhang L, Ioffe E, Parveen AA, Yancopoulos GD, Rudge J, Lowy I, Lin HC, MacDonald D, Daly C, Duan X, Thurston G. Resistance to Anti-VEGF Therapy Mediated by Autocrine IL6/STAT3 Signaling and Overcome by IL6 Blockade. Cancer Res 2016; 76:2327-39. [PMID: 26921327 DOI: 10.1158/0008-5472.can-15-1443] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Accepted: 12/29/2015] [Indexed: 11/16/2022]
Abstract
Anti-VEGF therapies benefit several cancer types, but drug resistance that limits therapeutic response can emerge. We generated cell lines from anti-VEGF-resistant tumor xenografts to investigate the mechanisms by which resistance develops. Of all tumor cells tested, only A431 (A431-V) epidermoid carcinoma cells developed partial resistance to the VEGF inhibitor aflibercept. Compared with the parental tumors, A431-V tumors secreted greater amounts of IL6 and exhibited higher levels of phospho-STAT3. Notably, combined blockade of IL6 receptor (IL6R) and VEGF resulted in enhanced activity against A431-V tumors. Similarly, inhibition of IL6R enhanced the antitumor effects of aflibercept in DU145 prostate tumor cells that displays high endogenous IL6R activity. In addition, post hoc stratification of data obtained from a clinical trial investigating aflibercept efficacy in ovarian cancer showed poorer survival in patients with high levels of circulating IL6. These results suggest that the activation of the IL6/STAT3 pathway in tumor cells may provide a survival advantage during anti-VEGF treatment, suggesting its utility as a source of response biomarkers and as a therapeutic target to heighten efficacious results. Cancer Res; 76(8); 2327-39. ©2016 AACR.
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Affiliation(s)
| | - Jia Su
- Regeneron Pharmaceuticals, Tarrytown, New York
| | | | - Li Zhang
- Regeneron Pharmaceuticals, Tarrytown, New York
| | - Ella Ioffe
- Regeneron Pharmaceuticals, Tarrytown, New York
| | | | | | - John Rudge
- Regeneron Pharmaceuticals, Tarrytown, New York
| | - Israel Lowy
- Regeneron Pharmaceuticals, Tarrytown, New York
| | | | | | | | - Xunbao Duan
- Regeneron Pharmaceuticals, Tarrytown, New York
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Wang F, Tian Y, Li G, Chen X, Yuan H, Wang D, Li J, Shen J, Tao Z, Fu Y, Lu L. Molecular cloning, expression and regulation analysis of the interleukin-6 (IL-6) gene in goose adipocytes. Br Poult Sci 2013; 53:741-6. [PMID: 23398417 DOI: 10.1080/00071668.2012.746639] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
1. Interleukin-6 (IL-6) is a multifunctional cytokine involved in lipid metabolism in adipose tissue. The objective of the study was to identify and characterize the IL-6 gene in the goose. 2. A full-length coding sequence (CDS) of the goose (Anser anser) IL-6 gene was cloned that encoded a 234-amino acid peptide containing a 38-amino acid signal peptide, an IL-6/G-CSF/MGF family consensus pattern and four conserved α-helices. The mature goose IL-6 showed 74% and 39% identities to that of chicken and human, respectively. 3. Quantitative real-time PCR analysis showed that the goose IL-6 was predominantly expressed in liver and was up-regulated in adipocytes by lipopolysaccharide (LPS) and oleic acid.
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Affiliation(s)
- F Wang
- Institute of Animal Husbandry and Veterinary Science, Zhejiang Academy of Agricultural Sciences, Zhejiang University, Hangzhou, PR China
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Kanda K, Komekado H, Sawabu T, Ishizu S, Nakanishi Y, Nakatsuji M, Akitake-Kawano R, Ohno M, Hiraoka Y, Kawada M, Kawada K, Sakai Y, Matsumoto K, Kunichika M, Kimura T, Seno H, Nishi E, Chiba T. Nardilysin and ADAM proteases promote gastric cancer cell growth by activating intrinsic cytokine signalling via enhanced ectodomain shedding of TNF-α. EMBO Mol Med 2012; 4:396-411. [PMID: 22351606 PMCID: PMC3403297 DOI: 10.1002/emmm.201200216] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 01/08/2012] [Accepted: 01/11/2012] [Indexed: 01/05/2023] Open
Abstract
Nardilysin (NRDc), a metalloendopeptidase of the M16 family, promotes ectodomain shedding of the precursor forms of various growth factors and cytokines by enhancing the protease activities of ADAM proteins. Here, we show the growth-promoting role of NRDc in gastric cancer cells. Analyses of clinical samples demonstrated that NRDc protein expression was frequently elevated both in the serum and cancer epithelium of gastric cancer patients. After NRDc knockdown, tumour cell growth was suppressed both in vitro and in xenograft experiments. In gastric cancer cells, NRDc promotes shedding of pro-tumour necrosis factor-alpha (pro-TNF-α), which stimulates expression of NF-κB-regulated multiple cytokines such as interleukin (IL)-6. In turn, IL-6 activates STAT3, leading to transcriptional upregulation of downstream growth-related genes. Gene silencing of ADAM17 or ADAM10, representative ADAM proteases, phenocopied the changes in cytokine expression and cell growth induced by NRDc knockdown. Our results demonstrate that gastric cancer cell growth is maintained by autonomous TNF-α–NF-κB and IL-6–STAT3 signalling, and that NRDc and ADAM proteases turn on these signalling cascades by stimulating ectodomain shedding of TNF-α.
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Affiliation(s)
- Keitaro Kanda
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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Libetta C, Sepe V, Dal Canton A. Bio-incompatibility and Th2 polarization during regular dialysis treatment. Int Rev Immunol 2011; 29:608-25. [PMID: 21073329 DOI: 10.3109/08830185.2010.522282] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Long-term hemodialysis treatment results in chronic monocyte activation with cytokine release. It generates Treg induction with potential immune dysfunction and associated clinical complications. Recent immunological data and preliminary clinical evidence suggest that synthetic polymers and vitamin E coated membranes are associated with a significant improvement in hemodialysis tolerance when compared to cellulose membranes. The aim of this review is to update cytokine release, T-cell polarization, and its clinical impact in patients under extracorporeal hemodialysis comparing traditional cellulose to synthetic/vitamin E coated membranes.
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Affiliation(s)
- Carmelo Libetta
- Unit of Nephrology, Dialysis, Transplantation, Fondazione I.R.C.C.S. San Matteo Hospital, Pavia, Italy, and University of Pavia, Pavia, Italy
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Lee EG, Baek JE, Lee SH, Kim TW, Choi JH, Rho MC, Ahn JO, Lee HW, Jung JK. Efficient proteolytic cleavage by insertion of oligopeptide linkers and its application to production of recombinant human interleukin-6 in Escherichia coli. Enzyme Microb Technol 2009. [DOI: 10.1016/j.enzmictec.2008.12.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Sachs L, Lotem J, Shabo Y. The molecular regulators of macrophage and granulocyte development. Role of MGI-2/IL-6. Ann N Y Acad Sci 2008; 557:417-35, discussion 435-7. [PMID: 2660699 DOI: 10.1111/j.1749-6632.1989.tb24035.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The development of a cell culture system for the in vitro cloning and clonal differentiation of normal hematopoietic cells made it possible to identify the proteins that regulate growth and differentiation of different hematopoietic cell lineages and the change in normal controls that produce leukemia. A model system with myeloid cells has identified different myeloid cell colony-inducing proteins, which we called MGI-1 (= CSF, including IL-3). There is another protein that we first described in 1976 and called MGI-2 in 1980 that induces differentiation of myeloid cells to macrophages or granulocytes without inducing the clonal growth of myeloid cells. The four CSF proteins and IL-1 induce the production of MGI-2 in myeloid cells and MGI-2 induces the production of GM-CSF. This shows the participation of MGI-2 in the network of interactions with different myeloid regulatory proteins. Using a monoclonal antibody to MGI-2, amino acid sequencing, and recombinant protein, we have shown in collaboration with the Genetics Institute that the major form of MGI-2 (MGI-2A) is IL-6. This shows that IL-6 is a myeloid cell differentiation inducing protein. The results also suggest new clinical potentials for MGI-2/IL-6.
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Affiliation(s)
- L Sachs
- Department of Genetics, Weizmann Institute of Science, Rehovot, Israel
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LEE FRANK, CHIU CHOYPIK, WIDEMAN JANUSZ, HODGKIN PHILLIP, HUDAK SUSAN, TROUTT LOUISE, NG THERESA, MOULDS COURTNEY, COFFMAN ROBERT, ZLOTNIK ALBERT, RENNICK DONNA. Interleukin-6. Ann N Y Acad Sci 2008. [DOI: 10.1111/j.1749-6632.1989.tb24015.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fey GH, Hattori M, Northemann W, Abraham LJ, Baumann M, Braciak TA, Fletcher RG, Gauldie J, Lee F, Reymond MF. Regulation of rat liver acute phase genes by interleukin-6 and production of hepatocyte stimulating factors by rat hepatoma cells. Ann N Y Acad Sci 2008; 557:317-29; discussion 329-31. [PMID: 2472092 DOI: 10.1111/j.1749-6632.1989.tb24024.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- G H Fey
- Department of Immunology, Research Institute of Scripps Clinic, La Jolla, California 92037
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GAULDIE JACK, RICHARDS CARL, NORTHEMANN WOLFGANG, FEY GEORG, BAUMANN HEINZ. IFNβ2/BSF2/IL-6 Is the Monocyte-derived HSF That Regulates Receptor-specific Acute Phase Gene Regulation in Hepatocytesa. Ann N Y Acad Sci 2008. [DOI: 10.1111/j.1749-6632.1989.tb23998.x] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Pessler F, Mayer CT, Jung SM, Behrens EM, Dai L, Menetski JP, Schumacher HR. Identification of novel monosodium urate crystal regulated mRNAs by transcript profiling of dissected murine air pouch membranes. Arthritis Res Ther 2008; 10:R64. [PMID: 18522745 PMCID: PMC2483455 DOI: 10.1186/ar2435] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2008] [Revised: 03/02/2008] [Accepted: 06/03/2008] [Indexed: 12/20/2022] Open
Abstract
Introduction The murine air pouch is a bursa-like space that resembles the human synovial membrane. Injection of monosodium urate (MSU) crystals into the pouch elicits an acute inflammatory response similar to human gout. We conducted the present study to identify mRNAs that were highly regulated by MSU crystals in the pouch membrane. Methods Air pouch membranes were meticulously dissected away from the overlying skin. Gene expression differences between MSU crystal stimulated and control membranes were determined by oligonucleotide microarray analysis 9 hours after injection of MSU crystals or buffer only. Differential regulation of selected targets was validated by relative quantitative PCR in time course experiments with dissected air pouch membranes and murine peritoneal macrophages. Results Eleven of the 12 most highly upregulated mRNAs were related to innate immunity and inflammation. They included mRNAs encoding histidine decarboxylase (the enzyme that synthesizes histamine), IL-6, the cell surface receptors PUMA-g and TREM-1, and the polypeptides Irg1 and PROK-2. IL-6 mRNA rose 108-fold 1 hour after crystal injection, coinciding with a surge in mRNAs encoding IL-1β, tumour necrosis factor-α and the immediate early transcription factor Egr-1. The other mRNAs rose up to 200-fold within the subsequent 3 to 8 hours. MSU crystals induced these mRNAs in a dose-dependent manner in cultured macrophages, with similar kinetics but lower fold changes. Among the downregulated mRNAs, quantitative PCR confirmed significant decreases in mRNAs encoding TREM-2 (an inhibitor of macrophage activation) and granzyme D (a constituent of natural killer and cytotoxic T cells) within 50 hours after crystal injection. Conclusion This analysis identified several genes that were previously not implicated in MSU crystal inflammation. The marked rise of the upregulated mRNAs after the early surge in cytokine and Egr-1 mRNAs suggests that they may be part of a 'second wave' of factors that amplify or perpetuate inflammation. Transcript profiling of the isolated air pouch membrane promises to be a powerful tool for identifying genes that act at different stages of inflammation.
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Affiliation(s)
- Frank Pessler
- Klinik und Poliklinik für Kinder und Jugendmedizin, Technische Universität Dresden, Fetscherstrasse, 01307 Dresden, Germany.
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Abstract
Autoimmune diseases afflict more than 3% of the U.S. population. Current therapy for mild to moderate cases is symptomatic, however advanced cases suffer high morbidity and mortality. Advanced patients have benefited from stem cell therapy in the form of bone marrow transplantation in conjunction with high-dose cytotoxic therapy. Broader application of stem cell therapy requires better understanding of how adult stem cells affect development and foster treatment of autoimmune pathologies, and of better ways to manipulate the host immune responses. While extensive research documents the role of hematopoietic stem cells (HSCs) in autoimmune disease, few studies have addressed if and how mesenchymal stem cells (MSCs) contribute to their etiopathology. Recent characterization of MSCs and their role in hematopoiesis and immune modulation suggest that their potential for cell therapy extends beyond their traditional accessory function in HSC engraftment. MSCs contribute significantly to tissue restructuring and immune functioning, in addition to facilitating durable, long-lasting stem cell engraftment. MSCs are relatively easy to obtain and expand in in vitro cultures, rendering them a prime candidate for genetic manipulations for stem cell therapy. They have the potential to differentiate into multiple lineages such as osteoblasts, adipose tissue, cartilage, tendon, and stromal cells. The role of MSCs for autoimmune disease therapy could thus be based both on immune function modulation and contribution to hematopoiesis. In this review, we examine the biology of MSCs, and their potential for cell therapy of autoimmune disease.
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Affiliation(s)
- Nagwa S El-Badri
- Center for Excellence for Aging and Brain Repair, Department of Neurosurgery, College of Medicine, University of South Florida, Tampa, FL 33612, USA.
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Rodríguez MDC, Bernad A, Aracil M. Interleukin-6 deficiency affects bone marrow stromal precursors, resulting in defective hematopoietic support. Blood 2003; 103:3349-54. [PMID: 14701687 DOI: 10.1182/blood-2003-10-3438] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Interleukin-6 (IL-6) is a critical factor in the regulation of stromal function and hematopoiesis. In vivo bromodeoxyuridine incorporation analysis indicates that the percentage of Lin(-)Sca-1(+) hematopoietic progenitors undergoing DNA synthesis is diminished in IL-6-deficient (IL-6(-/-)) bone marrow (BM) compared with wild-type BM. Reduced proliferation of IL-6(-/-) BM progenitors is also observed in IL-6(-/-) long-term BM cultures, which show defective hematopoietic support as measured by production of total cells, granulocyte macrophage-colony-forming units (CFU-GMs), and erythroid burst-forming units (BFU-Es). Seeding experiments of wild-type and IL-6(-/-) BM cells on irradiated wild-type or IL-6-deficient stroma indicate that the hematopoietic defect can be attributed to the stromal and not to the hematopoietic component. In IL-6(-/-) BM, stromal mesenchymal precursors, fibroblast CFUs (CFU-Fs), and stroma-initiating cells (SICs) are reduced to almost 50% of the wild-type BM value. Moreover, IL-6(-/-) stromata show increased CD34 and CD49e expression and reduced expression of the membrane antigens vascular cell adhesion molecule-1 (VCAM-1), Sca-1, CD49f, and Thy1. These data strongly suggest that IL-6 is an in vivo growth factor for mesenchymal precursors, which are in part implicated in the reduced longevity of the long-term repopulating stem cell compartment of IL-6(-/-) mice.
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Affiliation(s)
- María del Carmen Rodríguez
- Department of Immunology and Oncology, Centro Nacional de Biotecnología/CSIC, UAM Campus de Cantoblanco, E-28049 Madrid, Spain
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18
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Hale KD, Weigent DA, Gauthier DK, Hiramoto RN, Ghanta VK. Cytokine and hormone profiles in mice subjected to handling combined with rectal temperature measurement stress and handling only stress. Life Sci 2003; 72:1495-508. [PMID: 12535717 DOI: 10.1016/s0024-3205(02)02415-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Stress is known to either up or down regulate immunity. In this study, mice were subjected to handling combined with rectal temperature measurement (RTM) stress or handling only stress. We investigated whether there were any significant differences in the effect of handling combined with RTM and handling only on NK cell activity, serum cytokine (IL-1beta, IL-6, and TNF-alpha) and ACTH and beta-endorphin levels, and splenic cytokine (IL-1beta, IL-6, TNF-alpha, IFN-alpha, and IFN-beta) levels. Circulating cytokines and hormones and splenic cytokine mRNA levels were measured in individual mice. NK cell activity was significantly increased in both stress groups when compared to the control group. Handling combined with RTM produced significantly increased serum levels of IL-1beta, IL-6, and beta-endorphin. Serum IL-1beta, ACTH, and beta-endorphin were elevated significantly in the handling only group. Splenic TNFalpha mRNA in both of the stress groups and IL-6 mRNA in handling only group decreased significantly. Our observations are supported by existing literature demonstrating that various stressors have differential effects on immune functions and the neuroendocrine hormones and cytokines, which regulate them.
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Affiliation(s)
- Kimberly D Hale
- Department of Biology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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19
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Zeytun A, McKallip RJ, Fisher M, Camacho I, Nagarkatti M, Nagarkatti PS. Analysis of 2,3,7,8-tetrachlorodibenzo-p-dioxin-induced gene expression profile in vivo using pathway-specific cDNA arrays. Toxicology 2002; 178:241-60. [PMID: 12167310 DOI: 10.1016/s0300-483x(02)00230-5] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
In the current study, we used pathway-specific cDNA arrays to detect the transcriptional signature induced by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in vivo by studying simultaneously the expression profiles of 83 genes involved in apoptosis, cytokine production and angiogenesis. To this end, C57BL/6 mice were injected i.p. with 50 microg/kg body weight of TCDD and 1 or 3 days later, the thymus was analyzed for gene expression profiles. In the thymus, 23 out of 37 apoptotic genes screened were up-regulated by TCDD by a factor of two or more when compared to the vehicle-treated controls. In contrast, in the spleen, 20 out of 22 and in the liver, 16 out of 37 apoptotic genes were up-regulated. In the thymus, several genes encoding caspases, and members of the TNF family, including Fas ligand, were induced. Also, in the thymus, eight out of 23, and in the spleen, six out of 23 cytokine genes were up-regulated. In the liver and to a lesser extent in the thymus, certain angiogenesis genes were induced while others were repressed. When mice were injected with 0.1, 1, 10 or 50 microg/kg body weight of TCDD and the thymus was analyzed for apoptotic genes 1 day later, a dose-dependent response was not seen with most apoptotic genes. However, certain apoptotic genes were induced in the thymus even at low doses of 0.1 microg/kg body weight of TCDD. These data demonstrate that TCDD alters the expression of a large array of genes involved in apoptosis, cytokine production and angiogenesis. Thus, pathway-specific cDNA arrays may help in the identification of specific gene expression profiles induced by xenobiotics and to delineate the molecular mechanisms of toxicity.
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Affiliation(s)
- Ahmet Zeytun
- Department of Microbiology and Immunology, Medical College of Virginia Campus, Virginia Commonwealth University, Richmond, VA 23113, USA
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20
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Guilpin VO, Swardson-Olver C, Nosbisch L, Titus RG. Maxadilan, the vasodilator/immunomodulator from Lutzomyia longipalpis sand fly saliva, stimulates haematopoiesis in mice. Parasite Immunol 2002; 24:437-46. [PMID: 12406198 DOI: 10.1046/j.1365-3024.2002.00484.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Protozoal parasites of the genus Leishmania are transmitted to their vertebrate host within the saliva of the sand fly during a blood meal. The saliva of the sand fly Lutzomyia longipalpis contains maxadilan, a potent vasodilator and immunomodulator. Maxadilan has been shown to enhance the virulence of L. major in all strains of laboratory mice when injected along with the organism. Increased haematopoiesis has been associated with enhanced susceptibility to Leishmania organisms. Here, we show that maxadilan alone stimulates bone marrow haematopoiesis through its ability to stimulate interleukin-6 production by bone marrow stromal cells. Moreover, these effects of maxadilan are mediated through the interaction of maxadilan with the pituitary adenylate cyclase activating polypeptide receptor. These data suggest that increasing haematopoiesis may be yet another way that maxadilan enhances susceptibility of mice to Leishmania infection.
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Affiliation(s)
- Valerie O Guilpin
- Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO 80523-1671, USA
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21
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Saito H, Patterson C, Hu Z, Runge MS, Tipnis U, Sinha M, Papaconstantinou J. Expression and self-regulatory function of cardiac interleukin-6 during endotoxemia. Am J Physiol Heart Circ Physiol 2000; 279:H2241-8. [PMID: 11045959 DOI: 10.1152/ajpheart.2000.279.5.h2241] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Interleukin (IL)-6 reportedly has negative inotropic and hypertrophic effects on the heart. Here, we describe endotoxin-induced IL-6 in the heart that has not previously been well characterized. An intraperitoneal injection of a bacterial lipopolysaccharide into C57BL/6 mice induced IL-6 mRNA in the heart more strongly than in any other tissue examined. Induction of mRNA for two proinflammatory cytokines, IL-1beta and tumor necrosis factor (TNF)-alpha, occurred rapidly before the induction of IL-6 mRNA and protein. Although stimulation of isolated rat neonatal myocardial cells with IL-1beta or TNF-alpha induced IL-6 mRNA in vitro, nonmyocardial heart cells produced higher levels of IL-6 mRNA upon stimulation with IL-1beta. In situ hybridization and immunohistochemical analyses localized the IL-6 expression primarily in nonmyocardial cells in vivo. Endotoxin-induced expression of cardiac IL-1beta, TNF-alpha, and intercellular adhesion molecule 1 was augmented in IL-6-deficient mice compared with control mice. Thus cardiac IL-6, expressed mainly by nonmyocardial cells via IL-1beta action during endotoxemia, is likely to suppress expression of proinflammatory mediators and to regulate itself via a negative feedback mechanism.
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Affiliation(s)
- H Saito
- Department of Human Biological Chemistry and Genetics, University of Texas Medical Branch, Galveston, Texas 77555, USA.
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22
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Guo Y, Matsumoto T, Kikuchi Y, Ikejima T, Wang B, Yamada H. Effects of a pectic polysaccharide from a medicinal herb, the roots of Bupleurum falcatum L. on interleukin 6 production of murine B cells and B cell lines. IMMUNOPHARMACOLOGY 2000; 49:307-16. [PMID: 10996028 DOI: 10.1016/s0162-3109(00)00245-9] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effect of T-cell-independent B cell mitogen, a pectic polysaccharide, bupleuran 2IIc, from a medicinal herb, the roots of Bupleurum falcatum L. on interleukin 6 (IL-6) production of murine B cells and B cell lines was investigated in order to clarify the mechanism of enhanced immunoglobulin (Ig) secretion from B cells. Bupleuran 2IIc enhanced IgM secretion from highly purified murine normal B cells. When normal B cells from murine spleen were cultured with bupleuran 2IIc in the presence of anti-IL-6 neutralizing antibody, the enhanced IgM secretion by bupleuran 2IIc was reduced. When B cells were stimulated with bupleuran 2IIc, their IL-6 secretion and the transcription of IL-6 mRNA were enhanced. The enhanced IL-6 secretion by bupleuran 2IIc was also observed in B cell line, Y16 cell. When bupleuran 2IIc was digested with endo-alpha-(1-->4)-D-polygalacturonase, the resulting enzyme resistant carbohydrate portion, "ramified" region (PG-1) composed of rhamnogalacturonan core containing neutral sugar side chains showed potent IL-6 secretion-enhancing activity. These results suggest that the "ramified" region of bupleuran 2IIc stimulates the secretion of IL-6 as the active site, and the resulting IL-6 may partially contribute the enhancement of IgM secretion as an autocrine and/or paracrine mechanism.
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Affiliation(s)
- Y Guo
- Oriental Medicine Research Center, The Kitasato Institute, 5-9-1, Shirokane, Minato-ku, 108-8642, Tokyo, Japan
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23
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Ali C, Nicole O, Docagne F, Lesne S, MacKenzie ET, Nouvelot A, Buisson A, Vivien D. Ischemia-induced interleukin-6 as a potential endogenous neuroprotective cytokine against NMDA receptor-mediated excitotoxicity in the brain. J Cereb Blood Flow Metab 2000; 20:956-66. [PMID: 10894179 DOI: 10.1097/00004647-200006000-00008] [Citation(s) in RCA: 147] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
In the brain, the expression of the pleiotropic cytokine interleukin-6 (IL-6) is enhanced in various chronic or acute central nervous system disorders. However, the significance of IL-6 production in such neuropathologic states remains controversial. The present study investigated the role of IL-6 after cerebral ischemia. First, the authors showed that focal cerebral ischemia in rats early up-regulated the expression of IL-6 mRNA, without affecting the transcription of its receptors (IL-6Ralpha and gp130). Similarly, the striatal injection of N-methyl-D-aspartate (NMDA) in rats, a paradigm of excitotoxic injury, activated the expression of IL-6 mRNA. The involvement of glutamatergic receptor activation was further investigated by incubating cortical neurons with NMDA or alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionate (AMPA). NMDA and ionomycin (a calcium ionophore) up-regulated IL-6 mRNA, suggesting that neurons may produce IL-6 in response to the calcium influx mediated through NMDA receptors. The potential role of IL-6 during ischemic/excitotoxic insults was then studied by testing the effect of IL-6 against apoptotic or excitotoxic challenges in cortical cultures. IL-6 did not prevent serum deprivation- or staurosporine-induced apoptotic neuronal death, or AMPA/kainate-mediated excitotoxicity. However, in both mixed and pure neuronal cultures, IL-6 dose-dependently protected neurons against NMDA toxicity. This effect was blocked by a competitive inhibitor of IL-6. Overall, the results suggest that the up-regulation of IL-6 induced by cerebral ischemia could represent an endogenous neuroprotective mechanism against NMDA receptor-mediated injury.
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MESH Headings
- Animals
- Apoptosis/drug effects
- Apoptosis/immunology
- Astrocytes/cytology
- Brain Chemistry/drug effects
- Brain Chemistry/immunology
- Cells, Cultured
- Cerebral Cortex/blood supply
- Cerebral Cortex/cytology
- Cerebral Cortex/immunology
- Excitatory Amino Acid Agonists/pharmacology
- Gene Expression/drug effects
- Gene Expression/immunology
- Infarction, Middle Cerebral Artery/immunology
- Interleukin-6/genetics
- Interleukin-6/immunology
- Ionomycin/pharmacology
- Ionophores/pharmacology
- Ischemic Attack, Transient/immunology
- Male
- N-Methylaspartate/pharmacology
- Neurons/chemistry
- Neurons/cytology
- Neurons/immunology
- Neuroprotective Agents/immunology
- Neurotoxins/pharmacology
- Polymerase Chain Reaction
- RNA, Messenger/analysis
- Rats
- Rats, Sprague-Dawley
- Receptors, AMPA/physiology
- Receptors, Interleukin-6/genetics
- Receptors, Interleukin-6/immunology
- Receptors, Kainic Acid/physiology
- Receptors, N-Methyl-D-Aspartate/physiology
- Transcription, Genetic/immunology
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Affiliation(s)
- C Ali
- Université de Caen, UMR-CNRS 6551, IFR 47, France
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24
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Remy-Martin JP, Marandin A, Challier B, Bernard G, Deschaseaux M, Herve P, Wei Y, Tsuji T, Auerbach R, Dennis JE, Moore KA, Greenberger JS, Charbord P. Vascular smooth muscle differentiation of murine stroma: a sequential model. Exp Hematol 1999; 27:1782-95. [PMID: 10641596 DOI: 10.1016/s0301-472x(99)00122-8] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Previous studies by our group showed that stromal cells from human long-term marrow cultures were mesenchymal cells following a vascular smooth muscle pathway. The present study using 58 immortalized stromal lines from different hematopoietic sites was conducted to verify whether this hypothesis also held true for murine stroma. Principal components analysis performed using cytoskeletal and extracellular matrix proteins allowed the segregation of five factors explaining more than 70% of the variance. Factor I, including osteopontin and vimentin, and factor II, laminins and fibronectins, were representative of the mesenchyme. The remaining three factors were representative of vascular smooth muscle: factor III, including alphaSM actin, SM alpha actinin, SM22alpha, EDa+ fibronectin, and thrombospondin-1; factor IV, metavinculin and h-caldesmon; and factor V, smooth muscle myosin SM1 and desmin. All lines expressed factors I and II; 53 lines expressed factor III, 35 lines expressed factor IV; and 11 lines expressed factor V. A second principal components analysis including membrane antigens indicated the cosegregration of vascular cell adhesion molecule-1 with osteopontin and that of Ly6A/E with vimentin, whereas CD34 and Thy-1 appeared to be independent factors. The heterogeneity of vascular smooth muscle markers expression suggests that harmonious maintenance of hematopoiesis depends on the cooperation between different stromal cell clones.
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Affiliation(s)
- J P Remy-Martin
- E.T.S. de Franche-Comté and Departement d'Information Medicale, Besancon, France
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25
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Saijo S, Kotani M, Habu K, Ishitsuka C, Yamamoto H, Sekiguchi T, Iwakura Y. Bone Marrow-Derived Cells Are Responsible for the Development of Autoimmune Arthritis in Human T Cell Leukemia Virus Type I-Transgenic Mice and Those of Normal Mice Can Suppress the Disease. THE JOURNAL OF IMMUNOLOGY 1999. [DOI: 10.4049/jimmunol.163.10.5700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Previously, we reported that human T cell leukemia virus type I env-pX region-introduced transgenic (pX-Tg) mice developed an inflammatory polyarthropathy associated with a development of autoimmunity. To elucidate roles of autoimmunity in the development of arthritis, the immune cells were reciprocally replaced between pX-Tg mice and non-transgenic (Tg) mice. When bone marrow (BM) cells and spleen cells from pX-Tg mice were transferred into irradiated non-Tg mice, arthritis developed in these mice. In contrast, arthritis in pX-Tg mice was completely suppressed by non-Tg BM and spleen cells. Similar results were obtained with BM cells only. After the transplantation, T cells, B cells, and macrophages were replaced completely, whereas cells in the joints were replaced partially. In those mice, serum Ig and rheumatoid factor levels correlated with the disease development, and inflammatory cytokine expression was elevated in the arthritic joints. Furthermore, involvement of T cells in the joint lesion was suggested, because the incidence was greatly reduced in athymic nu/nu mice although small proportion of the mice still developed arthritis. These observations suggest that BM stem cells are abnormal, causing autoimmunity in pX-Tg mice, and this autoimmunity plays an important, but not absolute, role in the development of arthritis in this Tg mouse.
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Affiliation(s)
- Shinobu Saijo
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo, Japan; and
| | - Motoko Kotani
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo, Japan; and
| | - Kiyoshi Habu
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo, Japan; and
| | - Chiho Ishitsuka
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo, Japan; and
| | | | | | - Yoichiro Iwakura
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Tokyo, Japan; and
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26
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Gao JX, Madrenas J, Zeng W, Cameron MJ, Zhang Z, Wang JJ, Zhong R, Grant D. CD40-deficient dendritic cells producing interleukin-10, but not interleukin-12, induce T-cell hyporesponsiveness in vitro and prevent acute allograft rejection. Immunology 1999; 98:159-70. [PMID: 10540214 PMCID: PMC2326930 DOI: 10.1046/j.1365-2567.1999.00863.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The induction of an immune response or tolerance is mediated by corresponding subsets of dendritic cells (DC). However, the property of tolerogenic DC is not clear. Recently, we have characterized a population of CD11c+ splenic DC derived from long-term mixed leucocyte culture (LT-MLC), which are able to proliferate upon stimulation and have a strong primary mixed leucocyte reaction (MLR)-stimulating activity in conventional MLR. In this study, we show that, in contrast to the irradiated ones, non-irradiated LT-MLC-derived DC induce polyclonal antigen-specific T-cell hyporesponsiveness when cocultured with allogeneic splenocytes for 3-11 days. The degree of the hyporesponsiveness increased with the length of coculture. Although these DC expressed major histocompatibility complex class II and B7 costimulatory molecules, which are down-regulated during coculture, they expressed very low or undetectable CD40 before and after coculture, respectively. The CD40-deficient DC spontaneously produce interleukin-10 (IL-10), but not IL-12. The skewed balance between IL-10 and IL-12 is associated with their capability to induce T-cell hyporesponsiveness, because a neutralizing antibody to IL-10, exogenous recombinant IL-12 or lipopolysaccharide (LPS) significantly blocked the hyporesponsiveness. Accordingly, infusion of a small number of non-irradiated LT-MLC-derived DC (5x105) significantly prolonged the survival of a vascularized heterotopic murine heart transplant, whereas irradiated DC accelerated graft rejection. These data suggest that CD40-deficient DC producing IL-10, but not IL-12 can induce T-cell hyporesponsiveness in vitro and in vivo.
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Affiliation(s)
- J X Gao
- Transplantation and Immunobiology Group, The John P. Robarts Research Institute, London, Ont., Canada
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27
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Sjin RM, Lord KA, Abdollahi A, Hoffman B, Liebermann DA. Interleukin-6 and leukemia inhibitory factor induction of JunB is regulated by distinct cell type-specific cis-acting elements. J Biol Chem 1999; 274:28697-707. [PMID: 10497240 DOI: 10.1074/jbc.274.40.28697] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Interleukin (IL)-6 plays an important role in a wide range of biological activities, including differentiation of murine M1 myeloid leukemic cells into mature macrophages. At the onset of M1 differentiation, a set of myeloid differentiation primary response (MyD) genes are induced, including the proto-oncogene for JunB. In order to examine the molecular nature of the mechanisms by which IL-6 activates the immediate early expression of MyD genes, JunB was used as a paradigm. A novel IL-6 response element, -65/-52 IL-6RE, to which a 100-kDa protein complex is bound, has been identified on the JunB promoter. Leukemia inhibitory factor (LIF)-induced activation of JunB in M1 cells was also mediated via the -65/-52 IL-6RE. The STAT3 and CRE-like binding sites of the JunB promoter, identified as IL-6-responsive elements in HepG2 liver cells were found, however, to play no role in JunB inducibility by IL-6 in M1 myeloid cells. Conversely, the -65/-52 IL-6RE is shown not to be necessary for JunB inducibility by IL-6 or LIF in liver cells. It appears, therefore, that immediate early activation of JunB is regulated differently in M1 myeloid cells than in HepG2 liver cells. This indicates that distinct cis-acting control elements participate in cell type-specific induction of JunB by members of the IL-6 cytokine superfamily.
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Affiliation(s)
- R M Sjin
- Fels Institute for Cancer Research, Department of Biochemistry, Temple University School of Medicine, Philadelphia, Pennsylvania 19140, USA
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28
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Abstract
BACKGROUND Interleukin-6 (IL-6) is a multifunctional cytokine which mediates many aspects of the acute phase response. Although known to be produced by macrophages and other proinflammatory cells, IL-6 is also released by many types of epithelial cells. The present studies were performed to determine if endotoxin and proinflammatory cytokines stimulate the release of IL-6 from native murine hepatocytes. METHODS Cultured hepatocytes were treated with various concentrations of lipopolysaccharide (LPS), interleukin-1 (IL-1), or tumor necrosis factor (TNF), in the presence or absence of the IL-1 receptor antagonist (IL-1 RA), an anti-TNF antibody, or dexamethasone. Culture supernatants were assayed for murine IL-6 using an ELISA. The cellular source of IL-6 was investigated using immunohistochemical staining. RESULTS Hepatocyte IL-6 production was significantly increased following treatment with LPS, IL-1, and TNF. Combinations of LPS and these cytokines were synergistic in stimulating IL-6 release. Dexamethasone, but not IL-1 RA or an anti-TNF antibody, inhibited hepatocyte production of IL-6 in response to LPS. Immunohistochemical staining revealed that the hepatocytes, and not contaminating nonparenchymal cells, were the principal source of the IL-6 produced in these cultures. CONCLUSIONS Murine hepatocytes release significant amounts of IL-6 when exposed to endotoxin or proinflammatory cytokines. LPS appears to stimulate hepatocyte IL-6 production directly, and this effect does not appear to be mediated by IL-1 or TNF.
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Affiliation(s)
- N Panesar
- Department of Surgery, DVA Medical Center, St. Louis, Missouri, USA
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29
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Hasty AH, Linton MF, Brandt SJ, Babaev VR, Gleaves LA, Fazio S. Retroviral gene therapy in ApoE-deficient mice: ApoE expression in the artery wall reduces early foam cell lesion formation. Circulation 1999; 99:2571-6. [PMID: 10330390 DOI: 10.1161/01.cir.99.19.2571] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Apolipoprotein E (apoE) has long been known to play an important role in the clearance of plasma lipoproteins. More recently, a direct role for apoE in delaying atherogenesis has been proposed. Macrophage production of apoE in the artery wall has been demonstrated to provide protection against atherosclerotic lesion development independently from its role in lipoprotein clearance. However, whether macrophage apoE can affect lesion growth at all stages of atherogenesis remains to be established. METHODS AND RESULTS To evaluate the role of macrophage apoE in different stages of atherogenesis, as well as to establish a novel gene therapy approach to atherosclerotic vascular disease, we used an apoE-expressing retrovirus to transduce apoE-deficient (-/-) bone marrow for transplantation into apoE(-/-) recipient mice. Three weeks after bone marrow transplantation, apoE was expressed from arterial macrophages and was detectable in plasma associated with lipoproteins at 0.5% to 1% of normal levels but did not affect plasma cholesterol levels. We used 2 groups of recipient mice: younger mice with lesions consisting primarily of foam cells and older mice with more advanced lesions. When either the mouse or human apoE transgenes were expressed in mice from 5 to 13 weeks of age, there was a significant reduction in lesion area, whereas no effects were detected in mice that expressed apoE from 10 to 26 weeks of age. CONCLUSIONS We demonstrate that arterial macrophage apoE secretion can delay atherogenesis if expressed during foam cell formation but is not beneficial during the later stages of atherogenesis. These data also provide evidence that apoE transgene expression from arterial macrophages may have therapeutic applications.
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Affiliation(s)
- A H Hasty
- Department of Pathology, Vanderbilt University Medical Center, Nashville, Tenn, USA
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30
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Bottrel RL, Yang YL, Levy DE, Tomai M, Reis LF. The immune response modifier imiquimod requires STAT-1 for induction of interferon, interferon-stimulated genes, and interleukin-6. Antimicrob Agents Chemother 1999; 43:856-61. [PMID: 10103191 PMCID: PMC89217 DOI: 10.1128/aac.43.4.856] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Imiquimod is an oral inducer of interferon (IFN) and several other proinflammatory cytokines and has been successfully used topically as an antiviral agent for the treatment of genital warts. We have investigated the molecular mechanisms by which imiquimod induces the expression of IFNs, IFN-stimulated genes (ISGs), and proinflammatory cytokines in vivo, using mice deficient in various components of the IFN signaling system. Mice deficient in the transcription factor interferon regulatory factor 1 (IRF-1) or in the serine/threonine protein kinase PKR responded normally to imiquimod, producing high levels of circulating IFN and induction of several ISGs. On the other hand, when mice deficient in STAT-1 were treated, a 32-fold reduction in the level of circulating IFN was observed, together with a lack of induction of 2-5 oligo adenylate synthetase (2-5 OAS) and IRF-1 genes. Interestingly, there was also a lack of induction of interleukin-6 (IL-6) gene expression, although tumor necrosis factor was induced and readily detected in serum. In mice deficient in the type I IFN receptor, imiquimod induced levels of IFN similar to those in control mice, but again, neither 2-5 OAS, IRF-1, nor IL-6 genes were induced in mutant mice. Our results suggest that STAT-1 plays a critical role in the mechanism of gene activation by imiquimod. Moreover, induction of IL-6 gene expression appears to be dependent on components of the IFN signaling cascade.
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Affiliation(s)
- R L Bottrel
- Department of Microbiology, ICB, UFMG, Belo Horizonte, Brazil
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Habu K, Nakayama-Yamada J, Asano M, Saijo S, Itagaki K, Horai R, Yamamoto H, Sekiguchi T, Nosaka T, Hatanaka M, Iwakura Y. The Human T Cell Leukemia Virus Type I- tax Gene Is Responsible for the Development of Both Inflammatory Polyarthropathy Resembling Rheumatoid Arthritis and Noninflammatory Ankylotic Arthropathy in Transgenic Mice. THE JOURNAL OF IMMUNOLOGY 1999. [DOI: 10.4049/jimmunol.162.5.2956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
We previously reported that inflammatory arthropathy resembling rheumatoid arthritis (RA) develops among transgenic mice carrying the long terminal repeat (LTR)-env-pX-LTR region of human T cell leukemia virus type I (LTR-pX-Tg mice). Because four genes are encoded in this region, we produced transgenic mice that only express the tax gene to examine its role in the development of arthritis. Transgenic mice were produced by constructing DNAs that express the tax gene alone under the control of either its own LTR or CD4 enhancer/promoter and by microinjecting them into C3H/HeN-fertilized ova. We produced seven transgenic mice carrying the LTR-tax gene and nine mice carrying the CD4-tax and found that one of the LTR-tax-Tg mice and five of CD4-tax-Tg mice developed RA-like inflammatory arthropathy similar to LTR-pX-Tg mice, indicating that the tax gene is arthritogenic. On the other hand, the other two LTR-tax-Tg mice had ankylotic changes caused by new bone formation without inflammation. In these ankylotic mice, tax mRNA, inflammatory cytokine mRNA, and autoantibody levels except for TGF-β1 level were lower than those in LTR-pX- or CD4-tax-Tg mice. These results show that Tax is responsible for the development of inflammatory arthropathy resembling RA and that this protein also causes ankylotic arthropathy.
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Affiliation(s)
- Kiyoshi Habu
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
| | - Junko Nakayama-Yamada
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
| | - Masahide Asano
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
| | - Shinobu Saijo
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
| | - Keiko Itagaki
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
| | - Reiko Horai
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
| | - Hiroaki Yamamoto
- †Kohno Clinical Medicine Research Institute, Kitashinagawa, Shinagawa-ku, Tokyo, Japan; and
| | - Toyozo Sekiguchi
- †Kohno Clinical Medicine Research Institute, Kitashinagawa, Shinagawa-ku, Tokyo, Japan; and
| | - Tetsuya Nosaka
- ‡Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Masakazu Hatanaka
- ‡Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Yoichiro Iwakura
- *Center for Experimental Medicine, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
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Aiuti A, Cicchini C, Bernardini S, Fedele G, Amicone L, Fantoni A, Tripodi M. Hematopoietic support and cytokine expression of murine-stable hepatocyte cell lines (MMH). Hepatology 1998; 28:1645-54. [PMID: 9828230 DOI: 10.1002/hep.510280626] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
It was recently reported that transgenic expression in the liver of truncated human Met renders hepatocytes constitutively resistant to apoptosis and reproducibly permits their immortalization. The derived stable cell lines (MMH from Met murine hepatocyte) are highly differentiated and nontransformed. In this report, the capacity of MMHs to support in vitro hematopoiesis is characterized. By reverse-transcription polymerase chain reaction, the expression by MMHs of cytokines involved in the survival and self-renewal of early progenitor cells (stem cell factor and FLT3 ligand) as well as those acting at different stages of progenitor differentiation (interleukin [IL] 1beta, IL-3, leukemia inhibitory factor, IL-6, granulocyte-macrophage colony-stimulating factor, granulocyte colony-stimulating factor, macrophage colony-stimulating factor, and thrombopoietin) was shown. A ribonuclease protection assay further substantiated the presence of at least six cytokine transcripts in MMH lines. Cocultures between MMH layers and progenitor-enriched fetal liver hematopoietic cells resulted in a 40-fold to 80-fold expansion of total hematopoietic cells and in a 2.5-fold expansion of clonogenic progenitors after 1 to 2 weeks. Hematopoiesis was maintained for up to 6 weeks with formation of typical cobblestone cell areas and continuous differentiation of precursor into cells at various degrees of maturation. At 5 weeks of coculture, clonogenic progenitors were maintained at 20% of the input level in coculture with embryonic-derived hepatocytes, showing the ability of hepatocyte feeder layer to support survival and possibly self-renewal of clonogenic progenitors. Therefore, the data emphasize a direct role of the hepatocyte in sustaining hematopoietic cell proliferation and differentiation.
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Affiliation(s)
- A Aiuti
- Fondazione Istituto Pasteur-Cenci Bolognetti, Dipartimento di Biotecnologie Cellulari ed Ematologia, Università La Sapienza, Roma, Italy
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Vandebriel RJ, Van Loveren H, Meredith C. Altered cytokine (receptor) mRNA expression as a tool in immunotoxicology. Toxicology 1998; 130:43-67. [PMID: 9846995 DOI: 10.1016/s0300-483x(98)00089-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Molecular immunotoxicology is aimed at analysing exposure effects on the temporal expression of important immunoregulatory genes. Cytokines play key roles in the immune system and thus molecular immunotoxicology has focused on the analysis of cytokine (expression) levels. These targets offer important new avenues to explore both in terms of mechanistic understanding of immunotoxicity and in terms of developing new assays and tests for predicting the immunotoxic potential of novel compounds. Effects on cytokine levels can be analysed on two different levels, these being mRNA and protein. The choice essentially depends on the aim of the study. Proteins comprise the biological activity so they are a more direct measure than mRNA. mRNA on the other hand, measures at a specific point in time within a tissue or organ, whereas protein is measured in a body fluid, possibly as a spill-over from tissue, or in a supernatant as a summation over a culture period. mRNA levels are assayed using Northern or dot blotting that both comprise hybridisation and using reverse transcription-polymerase chain reaction (RT-PCR). Although the latter technique has both enormous sensitivity and relative ease of operation as important advantages, it requires much more effort in terms of quantitation. References to the nucleic acid sequences of human, murine, and rat cytokines and their receptors are presented (with accession numbers). Examples in which molecular techniques were successfully employed to assess immunotoxicity and (in some cases) understand mechanisms of action are also presented.
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Affiliation(s)
- R J Vandebriel
- Laboratory for Pathology and Immunobiology, National Institute of Public Health and the Environment, Bilthoven, The Netherlands.
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Hauser SP, Allewelt MC, Lipschitz DA. Effects of myelotoxic agents on cytokine production in murine long-term bone marrow cultures. Stem Cells 1998; 16:261-70. [PMID: 9708448 DOI: 10.1002/stem.160261] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In long-term bone marrow cultures we studied the effect of the addition of the myelotoxic agents methotrexate (MTX) and ceftazidime (CEF) on the kinetics of cytokine production in the supernatant (SN) and on mRNA expression in the adherent stromal layer. In response to a medium change, a prompt and significant increase in colony-stimulating activity (CSA) and interleukin 6 (IL-6) concentrations in the SN occurred, peaking 12 h later. Two macrophage colony-stimulating factors (M-CSF) mRNA of 23 kb and 4 kb were identified. In response to the medium change, the 4.0-kb transcript increased significantly six h later. The 2.3-kb transcript expression was stronger than the 4-kb mRNA but did not cycle with medium change. At medium change, IL-6 mRNA was only minimally expressed; then a prompt increase occurred, which peaked six h later. The addition of 500 mg/ml (=915 microM) CEF to the culture caused a dose-dependent suppression of CSA and IL-6 supernatant concentrations and IL-6 and M-CSF mRNA expression. By contrast, 1 microM MTX had minimal effect on cytokine concentrations in the SN following medium change. mRNA expression was, however, suppressed. These results provide insights into the possible mechanisms whereby cytokines lead to increased myeloid cell proliferation following medium change. We also demonstrate that two myelotoxic agents have different effects on cytokine production. This information could be of value in developing rational approaches to the therapeutic use of cytokines in drug-induced neutropenia.
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Affiliation(s)
- S P Hauser
- Department of Medicine, University of Arkansas for Medical Sciences, and Geriatric Research, Education and Clinical Center, John L. McClellan Memorial Veterans Administration Hospital, Little Rock, USA
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Steidler L, Robinson K, Chamberlain L, Schofield KM, Remaut E, Le Page RW, Wells JM. Mucosal delivery of murine interleukin-2 (IL-2) and IL-6 by recombinant strains of Lactococcus lactis coexpressing antigen and cytokine. Infect Immun 1998; 66:3183-9. [PMID: 9632584 PMCID: PMC108331 DOI: 10.1128/iai.66.7.3183-3189.1998] [Citation(s) in RCA: 157] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Lactococcus lactis is a nonpathogenic and noncolonizing bacterium which is being developed as a vaccine delivery vehicle for immunization by mucosal routes. To determine whether lactococci can also deliver cytokines to the immune system, we have constructed novel constitutive expression strains of L. lactis which accumulate a test antigen, tetanus toxin fragment C (TTFC), within the cytoplasmic compartment and also secrete either murine interleukin-2 (IL-2) or IL-6. When mice were immunized intranasally with various different expression strains of L. lactis, the anti-TTFC antibody titers increased more rapidly and were substantially higher in mice immunized with the bacterial strains which secreted IL-2 or IL-6 in addition to their production of TTFC. This adjuvant effect was lost when the recombinant strains of L. lactis were killed by pretreatment with mitomycin C and could therefore be attributed to the secretion of IL-2 or IL-6 by the recombinant lactococci. These results provide the first example of the use of a cytokine-secreting, noninvasive experimental bacterial vaccine vector to enhance immune responses to a coexpressed heterologous antigen and point the way to experiments which will test the possible therapeutic efficacy of this mode of cytokine delivery.
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Affiliation(s)
- L Steidler
- Department of Molecular Biology, Flanders Inter-University Institute for Biotechnology, and University of Ghent, B-9000 Ghent, Belgium
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36
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Williams SC, Du Y, Schwartz RC, Weiler SR, Ortiz M, Keller JR, Johnson PF. C/EBPepsilon is a myeloid-specific activator of cytokine, chemokine, and macrophage-colony-stimulating factor receptor genes. J Biol Chem 1998; 273:13493-501. [PMID: 9593684 DOI: 10.1074/jbc.273.22.13493] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
C/EBPepsilon is a member of the CCAAT/enhancer binding protein family of basic region/leucine zipper transcriptional activators. The C/EBPepsilon protein is highly conserved between rodents and humans, and its domain structure is very similar to C/EBPalpha. In mice C/EBPepsilon mRNA is only detected in hematopoietic tissues, including embryonic liver and adult bone marrow and spleen. Within the hematopoietic system, C/EBPepsilon is expressed primarily in myeloid cells, including promyelocytes, myelomonocytes, and their differentiated progeny. To identify potential functions of C/EBPepsilon, cell lines over-expressing the C/EBPepsilon protein were generated in the P388 lymphoblastic cell line. In contrast to the parental cell line, C/EBPepsilon-expressing cell lines displayed lipopolysaccharide-inducible expression of the interleukin-6 and monocyte chemoattractant protein 1 (MCP-1) genes as well as elevated basal expression of the MIP-1alpha and MIP-1beta chemokine genes. In the EML-C1 hematopoietic stem cell line, C/EBPepsilon mRNA levels increased as the cells progressed along the myeloid lineage, just preceding activation of the gene encoding the receptor for macrophage-colony-stimulating factor (M-CSFR). M-CSFR expression was stimulated in C/EBPepsilon-expressing P388 cell lines, when compared with either the parental P388 cells or P388 cell lines expressing either C/EBPalpha or C/EBPbeta. These results suggest that C/EBPepsilon may be an important regulator of differentiation of a subset of myeloid cell types and may also participate in the regulation of cytokine gene expression in mature cells.
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Affiliation(s)
- S C Williams
- Department of Cell Biology & Biochemistry, Texas Tech University Health Sciences Center, Lubbock, Texas 79430, USA.
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37
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Horai R, Asano M, Sudo K, Kanuka H, Suzuki M, Nishihara M, Takahashi M, Iwakura Y. Production of mice deficient in genes for interleukin (IL)-1alpha, IL-1beta, IL-1alpha/beta, and IL-1 receptor antagonist shows that IL-1beta is crucial in turpentine-induced fever development and glucocorticoid secretion. J Exp Med 1998; 187:1463-75. [PMID: 9565638 PMCID: PMC2212263 DOI: 10.1084/jem.187.9.1463] [Citation(s) in RCA: 514] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Interleukin (IL)-1 is a major mediator of inflammation and exerts pleiotropic effects on the neuro-immuno-endocrine system. To elucidate pathophysiological roles of IL-1, we have first produced IL-1alpha/beta doubly deficient (KO) mice together with mice deficient in either the IL-1alpha, IL-1beta, or IL-1 receptor antagonist (IL-1ra) genes. These mice were born healthy, and their growth was normal except for IL-1ra KO mice, which showed growth retardation after weaning. Fever development upon injection with turpentine was suppressed in IL-1beta as well as IL-1alpha/beta KO mice, but not in IL-1alpha KO mice, whereas IL-1ra KO mice showed an elevated response. At this time, expression of IL-1beta mRNA in the diencephalon decreased 1.5-fold in IL-1alpha KO mice, whereas expression of IL-1alpha mRNA decreased >30-fold in IL-1beta KO mice, suggesting mutual induction between IL-1alpha and IL-1beta. This mutual induction was also suggested in peritoneal macrophages stimulated with lipopolysaccharide in vitro. In IL-1beta KO mice treated with turpentine, the induction of cyclooxygenase-2 (EC 1.14.99.1) in the diencephalon was suppressed, whereas it was enhanced in IL-1ra KO mice. We also found that glucocorticoid induction 8 h after turpentine treatment was suppressed in IL-1beta but not IL-1alpha KO mice. These observations suggest that IL-1beta but not IL-1alpha is crucial in febrile and neuro-immuno-endocrine responses, and that this is because IL-1alpha expression in the brain is dependent on IL-1beta. The importance of IL-1ra both in normal physiology and under stress is also suggested.
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Affiliation(s)
- R Horai
- Laboratory Animal Research Center, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108, Japan
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38
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Mayer A, Podlech J, Kurz S, Steffens HP, Maiberger S, Thalmeier K, Angele P, Dreher L, Reddehase MJ. Bone marrow failure by cytomegalovirus is associated with an in vivo deficiency in the expression of essential stromal hemopoietin genes. J Virol 1997; 71:4589-98. [PMID: 9151853 PMCID: PMC191681 DOI: 10.1128/jvi.71.6.4589-4598.1997] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Bone marrow (BM) failure associated with cytomegalovirus (CMV) infection is a feared complication after clinical BM transplantation. Experiments in long-term BM cultures have indicated that BM stromal cells (BMSC) are targets of productive CMV infection, but an in situ infection of BM stroma remained to be documented, and the pathomechanism is open to question. Here we describe a murine in vivo model of lethal CMV aplastic anemia (CMV-AA). The reconstitution of hematopoietic progenitor cells expressing stem cell factor (SCF) receptor was found to be defective in CMV-AA. While murine CMV replication in permissive parenchymal tissues is cytolytic, the hematopoietic cord was found to be a site of very limited virus production with foci of reticular BMSC expressing the intranuclear viral IE1 protein, but with only a few BMSC positive for viral genome in the in situ hybridization. XX-XY BM chimeras were established in order to quantitate Y-chromosome-tagged BMSC by a PCR specific for the male-sex-determining gene Tdy. This approach revealed that murine CMV infection is not associated with a significant loss of BMSC. Despite the physical integrity of the stromal network, the functional integrity of the stroma was impaired. While housekeeping genes were expressed normally in BMSC of infected mice, the expression of genes encoding the essential hemopoietins SCF, granulocyte colony-stimulating factor, and interleukin-6 was markedly reduced. In conclusion, the mechanism of BM failure is not a stromal lesion but an insufficient stromal function. These findings explain CMV-AA as a manifestation of multiple hemopoietin deficiency.
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Affiliation(s)
- A Mayer
- Institute for Virology, Johannes Gutenberg-University, Mainz, Germany
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Muraoka K, Shimizu K, Sun X, Zhang YK, Tani T, Hashimoto T, Yagi M, Miyazaki I, Yamamoto K. Hypoxia, but not reoxygenation, induces interleukin 6 gene expression through NF-kappa B activation. Transplantation 1997; 63:466-70. [PMID: 9039941 DOI: 10.1097/00007890-199702150-00023] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Interleukin (IL) 6 is one of major mediators of inflammation, and IL-6 gene activation during hypoxia/reoxygenation has been implicated in the pathogenesis of ischemia/reperfusion injury. However, molecular events involved in IL-6 gene expression during hypoxia/reoxygenation remain to be identified. We have previously shown that NF-kappa B plays an essential and indispensable role in the transcriptional activation of the IL-6 gene induced by various stimuli, including IL-1 and tumor necrosis factor-alpha. We show here that hypoxia, but not reoxygenation, induces the activation of NF-kappa B through the degradation of a major inhibitor of NF-kappa B, I kappa B alpha. This hypoxia-induced NF-kappa B activation resulted in the kappa B-dependent transcriptional activation of the IL-6 gene. Interestingly, the time course of hypoxia-induced NF-kappa B activation was rather slow as compared with those of NF-kappa B activation induced by other stimuli, such as IL-1: a significant NF-kappa B activation was not observed before 1 hr of hypoxia treatment and persisted for up to 7 hr of hypoxia treatment. However, hypoxia-induced NF-kappa B activation was not inhibited by cycloheximide, which indicates that hypoxia directly triggers NF-kappa B activation. Furthermore, while hypoxia is unlikely to generate reactive oxygen intermediates, pretreatment of cells with antioxidants such as N-acetyl cysteine and alpha-tocopherol inhibited NF-kappa B activation induced by hypoxia. Thus, we discuss possible implications of these results for a postulated role of reactive oxygen intermediates in NF-kappa B activation.
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Affiliation(s)
- K Muraoka
- Department of Molecular Pathology, School of Medicine, Kanazawa University, Ishikawa, Japan
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40
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Hauser SP, Kajkenova O, Lipschitz DA. The pivotal role of interleukin 6 in formation and function of hematopoietically active murine long-term bone marrow cultures. Stem Cells 1997; 15:125-32. [PMID: 9090789 DOI: 10.1002/stem.150125] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The multifunctional cytokine interleukin 6 (IL-6) is involved in the regulation of inflammatory and immune responses, and influences many bone and bone marrow functions. In this report we show high concentrations of IL-6 in the supernatant of murine long-term bone marrow cultures (LTBMC). The concentration increases following medium change peaking 12 h later. IL-6 plays a critical role in the generation and maintenance of myelopoiesis in LTBMC. The addition of monoclonal anti-IL-6 antibody to culture significantly suppresses myeloid cell production. IL-6 is also necessary for stromal layer development and the initiation of myelopoiesis in LTBMC. Horse sera (HS) containing low concentrations of IL-6 did not support LTBMC stromal layer development or myeloid cell production, whereas those with high concentrations did. LTBMC initially set up with horse serum containing high IL-6 concentration produced higher concentrations of colony-stimulating activity and IL-6 at the fifth week after culture initiation than those with low concentrations. The ability of a deficient serum to support myelopoiesis could be improved by the addition of recombinant IL-6 to culture. Similarly, the addition of an anti-IL-6 antibody to culture impaired the ability of a HS to initiate and support myelopoiesis in LTBMC. These results suggest that IL-6 is one of the factors that play an essential role in the formation and function of hematopoietically active LTBMC.
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Affiliation(s)
- S P Hauser
- Department of Medicine, University of Arkansas for Medical Sciences, Little Rock, USA
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Sensebe L, Deschaseaux M, Li J, Herve P, Charbord P. The broad spectrum of cytokine gene expression by myoid cells from the human marrow microenvironment. Stem Cells 1997; 15:133-43. [PMID: 9090790 DOI: 10.1002/stem.150133] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Nontransformed stromal colony-derived cell lines (CDCLs) consist of a pure stromal cell population that differentiates following a vascular smooth muscle cell repertoire, and whose in vivo counterpart is that of myoid cells found in adult and fetal human bone marrow cords. We studied the cytokine expression by reverse-transcriptase polymerase chain reaction (RT-PCR) from pooled fast-growing clones from 10 different bone marrow samples. RT-PCR indicated that 30 cytokines (out of 42 studied) were expressed by CDCLs (20 after medium renewal and hydrocortisone renewal, three after addition of interleukin I beta (IL-1 beta) and seven in only part of the CDCL layers examined). The cytokines expressed comprised mediators known to be involved in the maintenance of early and late hematopoiesis (IL-1 alpha and IL-beta, IL-6, IL-7, IL-8, IL-11 and IL-13; colony-stimulating factors, thrombopoietin, erythropoietin, stem cell factor, fit 3-ligand, hepatocyte cell growth factor, tumor necrosis factor alpha, leukemia inhibitory factor, transforming growth factors beta 1 and beta 3; and macrophage inflammatory protein 1 alpha), angiogenic factors (fibroblast growth factors 1 and 2, vascular endothelial growth factor) and mediators whose usual target (and source) is the connective tissue-forming cells (platelet-derived growth factor A, epidermal growth factor, transforming growth factors alpha and beta 2, oncostatin M and insulin-like growth factor 1), or neuronal cells (nerve growth factor). The cytokines not expressed were lymphokines (IL-2, IL-3, IL-4, IL-5, IL-9, IL-10, and IL-12 and interferon gamma) or mediators synthesized by macrophages (inhibin, activin, platelet-derived growth factor B, and IL-1 receptor antagonist). This study complements the description of the phenotype of the myoid cells, confirming that these cells are the marrow connective tissue-forming cells; moreover, this work suggests that stromal control of hematopoiesis is multifactorial and that myoid cells are involved in the control of marrow angiogenesis and innervation.
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Affiliation(s)
- L Sensebe
- Laboratoire d'Etude de l'Hématopoièse, Etablissement de Transfusion Sanguine, Besançon, France
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Biffl WL, Moore EE, Moore FA, Peterson VM. Interleukin-6 in the injured patient. Marker of injury or mediator of inflammation? Ann Surg 1996; 224:647-64. [PMID: 8916880 PMCID: PMC1235442 DOI: 10.1097/00000658-199611000-00009] [Citation(s) in RCA: 378] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
OBJECTIVE The effects of interleukin (IL)-6 in the injured patient are examined in an attempt to clarify the potential pathophysiologic role of IL-6 in the response to injury. SUMMARY BACKGROUND DATA Interleukin-6 is an integral cytokine mediator of the acute phase response to injury and infection. However, prolonged and excessive elevations of circulating IL-6 levels in patients after trauma, burns, and elective surgery have been associated with complications and mortality. The mechanistic role of IL-6 in mediating these effects is unclear. METHODS A review of current literature is performed to summarize the origins, mechanisms of action, and biologic effects of IL-6 and to characterize the IL-6 response to injury. RESULTS Interleukin-6 is a multifunctional cytokine expressed by a variety of cells after a multitude of stimuli, under complex regulatory control mechanisms. The IL-6 response to injury is uniquely consistent and related to the magnitude of the insult. Moreover, the early postinjury IL-6 response correlates with complications as well as mortality. CONCLUSIONS Interleukin-6 appears to play an active role in the postinjury immune response, making it an attractive therapeutic target in attempts to control hyperinflammatory provoked organ injury.
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Affiliation(s)
- W L Biffl
- Department of Surgery, Denver General Hospital, Colorado 80204, USA
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43
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Affiliation(s)
- S H Goey
- Department of Medical Oncology, Rotterdam Cancer Institute (Daniel den Hoed Kliniek), The Netherlands
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44
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Ogasawara H, Tsuji T, Hirano D, Aoki Y, Nakamura M, Kodama H. Induction of IL-6 production by bone marrow stromal cells on the adhesion of IL-6-dependent hematopoietic cells. J Cell Physiol 1996; 169:209-16. [PMID: 8841437 DOI: 10.1002/(sici)1097-4652(199610)169:1<209::aid-jcp21>3.0.co;2-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Cellular interactions between hematopoietic cells and stromal cells play crucial roles in the proliferation and differentiation of the hematopoietic cells. Interleukin-6 (IL-6)-dependent 7TD1 cells markedly proliferated without IL-6 when they were co-cultured with hematopoietic-supportive bone marrow stromal cells, HESS-5 cells and HESS-1 CL.3 cells, which can support long-term hematopoiesis in vitro with but not without direct cell contact, cell contact being prevented with a microporous membrane. The production of IL-6 and the amount of IL-6 mRNA in hematopoietic-supportive stromal cells but not 7TD1 cells significantly increased only when the stromal cells were co-cultured in direct contact with 7TD1 cells. Furthermore, the amount of IL-6 mRNA increased according to the number of 7TD1 cells co-cultured. These inductions were not observed on co-culture with a murine myeloid cell line, M1 cells, or on the addition of the co-culture supernatant. These results suggest that 7TD1 cells transmit the signal to stromal cells that enhances IL-6 production by stromal cells via direct cell contact. A certain specific molecule for transduction of the signals may exist on the surface membrane of stromal cells and hematopoietic cells.
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Affiliation(s)
- H Ogasawara
- Life Science Research Laboratory, JT Inc, Kanagawa, Japan
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45
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King DP, Schrenzel MD, McKnight ML, Reidarson TH, Hanni KD, Stott JL, Ferrick DA. Molecular cloning and sequencing of interleukin 6 cDNA fragments from the harbor seal (Phoca vitulina), killer whale (Orcinus orca), and Southern sea otter (Enhydra lutris nereis). Immunogenetics 1996; 43:190-5. [PMID: 8575817 DOI: 10.1007/bf00587299] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Using polymerase chain reaction, interleukin-6 (IL-6) cDNA fragments from harbor seal (Phoca vitulina), killer whale (Orcinus orca), and Southern sea otter (Enhydra lutris nereis) were cloned and sequenced. For all three species, a continuous open reading frame encoding 203 residues for harbor seal, 199 residues for killer whale, and 201 residues for sea otter with stop codons located at analogous positions were identified. These fragments correspond to nucleotides 71 - 753 of the human IL-6 transcript and represent 96% of the complete coding nucleotides. Comparison of these marine mammal sequences with other published mammalian IL-6 cDNA demonstrated that both harbor seal and sea otter IL-6 had most similarity to that of other terrestrial carnivores (Mustelidae and Canidae), while killer whale had highest identity with ruminants (Bovidae and Ovidae). Among the three marine mammal species characterized, as well as cDNA sequences from nine other species, 40 invariant amino acids, including a number of residues situated at the putative gp80 and gp130 receptor binding sites, were identified. The presence of invariant amino acids within the receptor-binding portion of IL-6 for twelve different species suggests these positions are essential for biological activity of IL-6 and, moreover, likely account for the cross-reactivity among different mammalian IL-6-like activities in mouse bioassays. An additional significant finding was the presence of several variant residues only within the mouse putative IL-6 receptor binding region, which may account for observations of restricted cross-reactivity of mouse IL-6-like activity in human bioassays. Together, these findings provide insights into the evolution of the mammalian IL-6 gene and additional valuable information regarding amino acid residues essential for the biological activity of mammalian IL-6.
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Affiliation(s)
- D P King
- International Program for Marine Mammal Health, The Marine Mammal Center, Marin Headlands, GGNRA, Sausalito, CA 94965
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Kuramitsu Y, Nishibe M, Kobayashi M, Togashi Y, Yuan L, Takizawa M, Okada F, Hosokawa M. Transforming growth factor beta 1 (TGF-beta 1) produced in tumour tissue after chemotherapy acts as a lymphokine-activated killer attractant. Br J Cancer 1996; 74:274-9. [PMID: 8688335 PMCID: PMC2074585 DOI: 10.1038/bjc.1996.351] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Using an under agarose migration (UAM) assay, we studied lymphokine-activated killer (LAK)-attractant activity in cultured conditioned medium of tumour tissues after chemotherapy as a possible mechanism of enhanced LAK cell accumulation into tumour tissues after chemotherapy. BMT-11 is a fibrosarcoma developed in C57BL/6 mice. The conditioned medium of BMT-11 tumour tissues obtained from mice treated with various anti-cancer drugs had chemotactic activity for LAK cells (LAK-attractant activity). mRNA expression of interleukin (IL)-1 alpha, IL-6, IL-8, interferon (IFN)-gamma, and tumour necrosis factor (TNF)-alpha was observed in untreated tumour tissues, which were not enhanced by cyclophosphamide treatment. mRNA expression of TGF-beta 1 was not detected in untreated tumour tissues by reverse transcription-polymerase chain reaction (RT-PCR), but was detected in tumour tissues treated with cyclophosphamide. Recombinant human TGF-beta 1 showed LAK-attractant activity at a concentration of 0.1 ng ml-1 and 1 ng ml-1, whereas fresh splenocytes were not attracted by TGF-beta 1. Anti-TGF-beta 1 antibody inhibited LAK-attractant activity in the conditioned medium of tumour tissues treated with cyclophosphamide to approximately 35% that of control at 100 micrograms ml-1. These findings indicate that TGF-beta 1 produced in the tumour tissues of mice treated with anti-cancer drugs could be a LAK attractant. By a 4 h 51Cr release assay of natural killer cell-resistant BMT-11 tumour cells, we observed that TGF-beta 1 at a concentration from 0.01 ng ml-1 to 10 ng ml-1 did not inhibit LAK activity in an effector phase. Taken together, we suggest that TGF-beta 1 produced in tumour tissues after chemotherapy participates in gathering transferred LAK cells and contributes to the therapeutic effects of transferred LAK cells.
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Affiliation(s)
- Y Kuramitsu
- Laboratory of Pathology, Hokkaido University School of Medicine, Sapporo, Japan
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Maeda YY, Takahama S, Kohara Y, Yonekawa H. Two genes controlling acute phase responses by the antitumor polysacch aride, lentinan. Immunogenetics 1996; 43:215-9. [PMID: 8575820 DOI: 10.1007/bf00587302] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Lentinan, a beta-1,6;1,3-glucan, is tumor-specific for transplantable mouse solid-type tumors and it also stimulates the production of acute phase proteins (APPs). The APP response to lentinan is of the delayed type (DT-APR) and differs from that to lipopolysaccharide, which is acute. We found that the responses were genetically controlled in mice and that low responsiveness is dominant (Maeda et al. 1991). Using 123 segregants of crosses between SWR/J (a high responder) and Mus spretus (a low responder), we analyzed the linkage between DT-APR responsiveness and the DNA polymerase chain reaction-simple sequence length polymorphism (PCR-SSLP) phenotype using 80 chromosome-specific microsatellite markers. We identified two loci (ltn1.1 and ltn1.2) responsible for DT-APR. ltn1.1 is closely linked to D3Mit11 on chromosome 3 and ltn1.2 to D11Nds9 on chromosome 11 (P <0.001). The linkage analysis also suggested that ltn1.2 is the major determinant for DT-APR. Correlation between lentinan-specific IL-6 mRNA expression (the late expression) controlled recessively and DT-APR induction suggests that the ltn1 loci control some process(es) of IL-6 expression in the regulation step before NF-IL6.
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Affiliation(s)
- Y Y Maeda
- Department of Laboratory Animal Science, The Tokyo Metropolitan Institute of Medical Science, Tokyo 113, Japan
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48
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Dunstan SJ, Ramsay AJ, Strugnell RA. Studies of immunity and bacterial invasiveness in mice given a recombinant salmonella vector encoding murine interleukin-6. Infect Immun 1996; 64:2730-6. [PMID: 8698502 PMCID: PMC174133 DOI: 10.1128/iai.64.7.2730-2736.1996] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Interleukin-6 (IL-6) was expressed in Salmonella typhimurium in an attempt to increase the mucosal immune response against the bacterium. Murine IL-6 was PCR amplified from cDNA, cloned, sequenced, and found to be functionally active when expressed in S. typhimurium BRD509, the (delta)aroA (delta)aroD vaccine strain. Expression of murine IL-6 did not appear to adversely affect the growth of salmonellae, as the construct was retained in the absence of antibiotic selection and the growth rate was unaffected compared with that of the parent strain in vitro. However, IL-6 expression led to a significant reduction in bacterial invasiveness in vitro and in vivo. Splenocytes and small intestinal lamina propria lymphocytes were isolated from mice orally immunized with BRD509 expressing IL-6 (pKK233-2/IL-6), and the number of antibody-secreting cells was determined by the ELISPOT technique. No differences were observed between mice immunized with BRD509(pKK.233-2/IL-6) and those immunized with BRD509(pKK233-2) with respect to the antibody subclass-specific responses elicited despite the markedly reduced invasiveness of the former. Serum antibody responses were also examined by a kinetic enzyme-linked immunosorbent assay (ELISA), and equivalent levels of antibody response were detected in mice given BRD509(pKK233-2/IL-6) and those given BRD509(pKK233-2). The humoral immune response against bacterial lipopolysaccharides was also examined in transgenic IL-6-deficient mice given oral inocula of BRD509. Equivalent numbers of antibody-secreting cells (ELISPOTs) were observed in the spleens and laminae propriae of both IL-6-deficient (-/-) mice and control (+/+) mice harboring an intact IL-6 gene, whereas small, yet significant differences in the serum immunoglobulin A ELISA titers were observed. These data suggest that the immunoglobulin A response against Salmonella lipopolysaccharides is largely IL-6 independent.
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Affiliation(s)
- S J Dunstan
- Department of Microbiology, University of Melbourne, Parkville, Victoria, Australia
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Murray PJ, Aldovini A, Young RA. Manipulation and potentiation of antimycobacterial immunity using recombinant bacille Calmette-Guérin strains that secrete cytokines. Proc Natl Acad Sci U S A 1996; 93:934-9. [PMID: 8570663 PMCID: PMC40162 DOI: 10.1073/pnas.93.2.934] [Citation(s) in RCA: 144] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Bacille Calmette-Guérin (BCG) is a live, attenuated strain of Mycobacterium bovis used widely for tuberculosis prophylaxis and bladder cancer immunotherapy, although it has limitations in both contexts. To investigate whether BCG's immunostimulatory properties could be modified, and to gain insight into the interaction between mycobacteria and their hosts, we constructed recombinant BCG strains that secrete functional murine cytokines and studied their properties in mouse models of experimental infection. Cell-mediated immune responses to mycobacterial antigen (purified protein derivative) were assayed using splenocytes from mice inoculated with various BCG recombinants. Antigen-specific proliferation and cytokine release were found to be substantially greater with splenocytes derived from mice injected with cytokine-secreting BCG than with splenocytes from mice injected with BCG lacking cytokines. The most profound effects were induced by BCG secreting interleukin 2, interferon gamma, or granulocyte-macrophage colony-stimulating factor. Thus, cytokine-secreting BCG can enhance immune responses to mycobacterial antigens and may be improved reagents for tuberculosis prophylaxis and cancer immunotherapy.
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Affiliation(s)
- P J Murray
- Whitehead Institute for Biomedical Research, Nine Cambridge Center, MA 02142, USA
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50
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Beagley KW, Murray AM, McGhee JR, Eldridge JH. Peritoneal cavity CD5 (Bla) B cells: cytokine induced IgA secretion and homing to intestinal lamina propria in SCID mice. Immunol Cell Biol 1995; 73:425-32. [PMID: 8595920 DOI: 10.1038/icb.1995.66] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The mouse peritoneal cavity contains a unique population of B cells (Bla) with a high IgM/low IgD ratio, CD5+ (Ly1), MAC-1 + phenotype. These cells arise early in ontogeny, utilize a limited repertoire of immunoglobulin V genes, produce polyreactive IgM antibodies and have been implicated as the source of many auto-reactive immunoglobulins. Recent data from chimeric mice suggest that this B cell population also contains the precursors of many IgA plasma cells found in the lamina propria of the small intestine. In the present study we have investigated the potential of this cell population to secrete IgA (and IgG) in response to various cytokines. IL-5 alone, or in combination with IL-2, greatly enhanced secretion of both IgG and IgA. Cytokine-induced IgA secretion resulted from expansion of a subset of CD5 B cells co-expressing sIgA. Adoptive transfer of CD5 B cells while peripheral lymph nodes contained only IgM+ and some IgG+ B cells. Transfer of CD5+ B cells also reconstituted serum IgM, IgG and IgA and IgG, immunoglobulins characteristic of mucosal and anamnestic responses, when cultured in vitro with the appropriate cytokines. These cells also give rise to IgA plasma cells in the intestinal lamina propria following adoptive transfer to SCID mice, further supporting the hypothesis that cells of this lineage may be important in immune responses at mucosal surfaces.
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Affiliation(s)
- K W Beagley
- Discipline of Pathology, University of Newcastle, Callaghan, NSW, Australia
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