1
|
Abbey CA, Duran CL, Chen Z, Chen Y, Roy S, Coffell A, Sveeggen TM, Chakraborty S, Wells GB, Chang J, Bayless KJ. Identification of New Markers of Angiogenic Sprouting Using Transcriptomics: New Role for RND3. Arterioscler Thromb Vasc Biol 2024; 44:e145-e167. [PMID: 38482696 PMCID: PMC11043006 DOI: 10.1161/atvbaha.123.320599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Accepted: 02/28/2024] [Indexed: 04/26/2024]
Abstract
BACKGROUND New blood vessel formation requires endothelial cells to transition from a quiescent to an invasive phenotype. Transcriptional changes are vital for this switch, but a comprehensive genome-wide approach focused exclusively on endothelial cell sprout initiation has not been reported. METHODS Using a model of human endothelial cell sprout initiation, we developed a protocol to physically separate cells that initiate the process of new blood vessel formation (invading cells) from noninvading cells. We used this model to perform multiple transcriptomics analyses from independent donors to monitor endothelial gene expression changes. RESULTS Single-cell population analyses, single-cell cluster analyses, and bulk RNA sequencing revealed common transcriptomic changes associated with invading cells. We also found that collagenase digestion used to isolate single cells upregulated the Fos proto-oncogene transcription factor. Exclusion of Fos proto-oncogene expressing cells revealed a gene signature consistent with activation of signal transduction, morphogenesis, and immune responses. Many of the genes were previously shown to regulate angiogenesis and included multiple tip cell markers. Upregulation of SNAI1 (snail family transcriptional repressor 1), PTGS2 (prostaglandin synthase 2), and JUNB (JunB proto-oncogene) protein expression was confirmed in invading cells, and silencing JunB and SNAI1 significantly reduced invasion responses. Separate studies investigated rounding 3, also known as RhoE, which has not yet been implicated in angiogenesis. Silencing rounding 3 reduced endothelial invasion distance as well as filopodia length, fitting with a pathfinding role for rounding 3 via regulation of filopodial extensions. Analysis of in vivo retinal angiogenesis in Rnd3 heterozygous mice confirmed a decrease in filopodial length compared with wild-type littermates. CONCLUSIONS Validation of multiple genes, including rounding 3, revealed a functional role for this gene signature early in the angiogenic process. This study expands the list of genes associated with the acquisition of a tip cell phenotype during endothelial cell sprout initiation.
Collapse
Affiliation(s)
- Colette A. Abbey
- Texas A&M Health, Department of Medical Physiology, Texas A&M School of Medicine, Bryan TX
- Department of Molecular & Cellular Medicine, Texas A&M School of Medicine, Bryan, TX
| | - Camille L. Duran
- Department of Molecular & Cellular Medicine, Texas A&M School of Medicine, Bryan, TX
| | - Zhishi Chen
- Center for Genomic and Precision Medicine, Institute of Biosciences and Technology, Houston, TX
| | - Yanping Chen
- Center for Genomic and Precision Medicine, Institute of Biosciences and Technology, Houston, TX
| | - Sukanya Roy
- Texas A&M Health, Department of Medical Physiology, Texas A&M School of Medicine, Bryan TX
| | - Ashley Coffell
- Department of Molecular & Cellular Medicine, Texas A&M School of Medicine, Bryan, TX
| | - Timothy M. Sveeggen
- Department of Molecular & Cellular Medicine, Texas A&M School of Medicine, Bryan, TX
| | - Sanjukta Chakraborty
- Texas A&M Health, Department of Medical Physiology, Texas A&M School of Medicine, Bryan TX
| | - Gregg B. Wells
- Department of Molecular & Cellular Medicine, Texas A&M School of Medicine, Bryan, TX
- Department of Cell Biology and Genetics, Texas A&M School of Medicine, Bryan, TX
| | - Jiang Chang
- Center for Genomic and Precision Medicine, Institute of Biosciences and Technology, Houston, TX
| | - Kayla J. Bayless
- Texas A&M Health, Department of Medical Physiology, Texas A&M School of Medicine, Bryan TX
- Department of Molecular & Cellular Medicine, Texas A&M School of Medicine, Bryan, TX
| |
Collapse
|
2
|
Gorczynski R. Translation of Data from Animal Models of Cancer to Immunotherapy of Breast Cancer and Chronic Lymphocytic Leukemia. Genes (Basel) 2024; 15:292. [PMID: 38540350 PMCID: PMC10970502 DOI: 10.3390/genes15030292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 02/18/2024] [Accepted: 02/23/2024] [Indexed: 06/14/2024] Open
Abstract
The field of clinical oncology has been revolutionized over the past decade with the introduction of many new immunotherapies the existence of which have depended to a large extent on experimentation with both in vitro analysis and the use of various animal models, including gene-modified mice. The discussion below will review my own laboratory's studies, along with those of others in the field, on cancer immunotherapy. Our own studies have predominantly dwelt on two models of malignancy, namely a solid tumor model (breast cancer) and lymphoma. The data from our own laboratory, and that of other scientists, highlights the novel information so obtained, and the evidence that application of such information has already had an impact on immunotherapy of human oncologic diseases.
Collapse
Affiliation(s)
- Reginald Gorczynski
- Institute of Medical Science, Department of Immunology and Surgery, University of Toronto, C/O 429 Drewry Avenue, Toronto, ON M2R 2K6, Canada
| |
Collapse
|
3
|
Eidizadeh A, Papert S, Valk J, Pollok-Kopp B, Goldmann M, Riggert J, Moltrecht R, Legler TJ. Adverse drug reactions following lymphocyte immunotherapy for the treatment of infertility: A retrospective study. J Obstet Gynaecol Res 2022; 48:2571-2582. [PMID: 35775609 DOI: 10.1111/jog.15348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/25/2022] [Accepted: 06/20/2022] [Indexed: 11/30/2022]
Abstract
AIM Unexplained infertility is a major burden for couples who want to have children. Lymphocyte immunotherapy (LIT) could be a therapeutic help for these couples. Although LIT has been carried out for decades, the data on the success of therapy are still controversial and there is hardly information on possible adverse drug reactions. METHODS In this study, we used a questionnaire to determine the frequency of local and systemic adverse drug reactions in our patients who were treated with LIT between 2017 and 2020 (n = 302). In addition, we asked about pregnancies and/or live births after LIT in a 2-year follow-up (n = 140). RESULTS Most of the patients reported the occurrence of mild local adverse drug reactions in a period of less than 4 weeks: Over 75% reported moderate erythema, itching or swelling, over 10% erythema, itching or swelling as more pronounced adverse drug reaction. Blistering was specified in 10% of the cases. Serious adverse drug reactions or adverse events were not described. In the follow-up, 69% of our patients stated a pregnancy after LIT, and 50% a life birth. CONCLUSIONS Overall, LIT represents a well-tolerated therapy for couples with unexplained infertility, however, more evidence is needed on the benefits.
Collapse
Affiliation(s)
- Abass Eidizadeh
- Institute for Clinical Chemistry/Interdisciplinary UMG Laboratory, University Medical Center Göttingen, Göttingen, Germany
| | - Susanne Papert
- Department of Transfusion Medicine, University Medical Center Göttingen, Göttingen, Germany
| | - Jakob Valk
- Department of Transfusion Medicine, University Medical Center Göttingen, Göttingen, Germany
| | - Beatrix Pollok-Kopp
- Department of Transfusion Medicine, University Medical Center Göttingen, Göttingen, Germany
| | - Monika Goldmann
- Department of Transfusion Medicine, University Medical Center Göttingen, Göttingen, Germany
| | - Joachim Riggert
- Department of Transfusion Medicine, University Medical Center Göttingen, Göttingen, Germany
| | | | - Tobias J Legler
- Department of Transfusion Medicine, University Medical Center Göttingen, Göttingen, Germany
| |
Collapse
|
4
|
Li WX, Xu XH, Jin LP. Regulation of the innate immune cells during pregnancy: An immune checkpoint perspective. J Cell Mol Med 2021; 25:10362-10375. [PMID: 34708495 PMCID: PMC8581333 DOI: 10.1111/jcmm.17022] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2021] [Revised: 09/03/2021] [Accepted: 10/04/2021] [Indexed: 12/17/2022] Open
Abstract
The foetus can be regarded as a half‐allograft implanted into the maternal body. In a successful pregnancy, the mother does not reject the foetus because of the immune tolerance mechanism at the maternal‐foetal interface. The innate immune cells are a large part of the decidual leukocytes contributing significantly to a successful pregnancy. Although the contributions have been recognized, their role in human pregnancy has not been completely elucidated. Additionally, the accumulated evidence demonstrates that the immune checkpoint molecules expressed on the immune cells are co‐inhibitory receptors regulating their activation and biological function. Therefore, it is critical to understand the immune microenvironment and explore the function of the innate immune cells during pregnancy. This review summarizes the classic immune checkpoints such as PD‐1, CTLA‐4 and some novel molecules recently identified, including TIM‐3, CD200, TIGIT and the Siglecs family on the decidual and peripheral innate immune cells during pregnancy. Furthermore, it emphasizes the role of the immune checkpoint molecules in pregnancy‐associated complications and reproductive immunotherapy.
Collapse
Affiliation(s)
- Wen-Xuan Li
- Shanghai Key Laboratory of Maternal-Fetal Medicine, Clinical and Translational Research Center, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Xiang-Hong Xu
- Shanghai Key Laboratory of Maternal-Fetal Medicine, Clinical and Translational Research Center, Department of Biobank, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Li-Ping Jin
- Shanghai Key Laboratory of Maternal-Fetal Medicine, Clinical and Translational Research Center, Department of Biobank, Shanghai First Maternity and Infant Hospital, School of Medicine, Tongji University, Shanghai, China
| |
Collapse
|
5
|
Le CS, Hao XD, Li JW, Zhong JW, Lin HR, Zhou YT, Travis ZD, Tong LS, Gao F. CD200Fc Improves Neurological Function by Protecting the Blood-brain Barrier after Intracerebral Hemorrhage. Cell Transplant 2019; 28:1321-1328. [PMID: 31208229 PMCID: PMC6767889 DOI: 10.1177/0963689719857655] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
CD200 is widely distributed in the central nervous system and plays an essential role in
the immune response in neurological diseases. However, little is currently known about the
effects of CD200 signaling on the blood–brain barrier (BBB) function after intracerebral
hemorrhage (ICH). In this study, the role of CD200 during ICH in an autologous blood
induced mouse ICH model was investigated. Following ICH, critical protein expression, BBB
permeability, and neurological function were measured with or without CD200Fc
administration. Our results showed that both the expression of CD200 and CD200R1 decreased
after ICH and administration of CD200Fc attenuated BBB leakage and improved neurological
functions. In conclusion, our work demonstrated that CD200Fc might be a potential
treatment option for ICH by protecting the BBB and improving functional outcomes.
Collapse
Affiliation(s)
- Chen-Sheng Le
- Department of Neurology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.,All the authors contributed equally to this article
| | - Xiao-di Hao
- Department of Neurology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.,All the authors contributed equally to this article
| | - Jia-Wen Li
- Department of Neurology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Jia-Wei Zhong
- Department of Neurology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Hao-Ran Lin
- College of Pharmaceutical Science, Zhejiang University, Hangzhou, Zhejiang, China
| | - Yi-Ting Zhou
- Department of Pharmacy, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
| | - Zachary D Travis
- Loma Linda University, School of Medicine, Earth and Biological Sciences, Loma Linda, CA, USA
| | - Lu-Sha Tong
- Department of Neurology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.,All the authors contributed equally to this article
| | - Feng Gao
- Department of Neurology, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang, China.,All the authors contributed equally to this article
| |
Collapse
|
6
|
Ritzel RM, Al Mamun A, Crapser J, Verma R, Patel AR, Knight BE, Harris N, Mancini N, Roy-O'Reilly M, Ganesh BP, Liu F, McCullough LD. CD200-CD200R1 inhibitory signaling prevents spontaneous bacterial infection and promotes resolution of neuroinflammation and recovery after stroke. J Neuroinflammation 2019; 16:40. [PMID: 30777093 PMCID: PMC6378746 DOI: 10.1186/s12974-019-1426-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 01/31/2019] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Ischemic stroke results in a robust inflammatory response within the central nervous system. As the immune-inhibitory CD200-CD200 receptor 1 (CD200R1) signaling axis is a known regulator of immune homeostasis, we hypothesized that it may play a role in post-stroke immune suppression after stroke. METHODS In this study, we investigated the role of CD200R1-mediated signaling in stroke using CD200 receptor 1-deficient mice. Mice were subjected to a 60-min middle cerebral artery occlusion and evaluated at days 3 and 7, representing the respective peak and early resolution stages of neuroinflammation in this model of ischemic stroke. Infarct size and behavioral deficits were assessed at both time points. Central and peripheral cellular immune responses were measured using flow cytometry. Bacterial colonization was determined in lung tissue homogenates both after acute stroke and in an LPS model of systemic inflammation. RESULTS In wild-type (WT) animals, CD200R1 was expressed on infiltrating monocytes and lymphocytes after stroke but was absent on microglia. Early after ischemia (72 h), CD200R1-knockout (KO) mice had significantly poorer survival rates and an enhanced susceptibility to spontaneous bacterial colonization of the respiratory tract compared to wild-type (WT) controls, despite no difference in infarct or neurological deficits. While the CNS inflammation was resolved by day 7 post-stroke in WT mice, brain-resident microglia and monocyte activation persisted in CD200R1-KO mice, accompanied by a delayed, augmented lymphocyte response. At this time point, CD200R1-KO mice displayed greater weight loss, more severe neurological deficits, and impaired motor function compared to WT. Systemically, CD200R1-KO mice exhibited signs of persistent infection including lymphopenia, T cell activation and memory conversion, and narrowing of the TCR repertoire. These findings were confirmed in a second model of acute neuroinflammation induced by systemic endotoxin challenge. CONCLUSION This study defines an essential role of CD200-CD200R1 signaling in stroke. Loss of CD200R1 led to high mortality, increased rates of post-stroke infection, and enhanced entry of peripheral leukocytes into the brain after ischemia, with no increase in infarct size. This suggests that the loss of CD200 receptor leads to enhanced peripheral inflammation that is triggered by brain injury.
Collapse
Affiliation(s)
- Rodney M Ritzel
- Department of Anesthesiology, Center for Shock, Trauma and Anesthesiology Research (STAR) Center, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Abdullah Al Mamun
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin Street, Houston, TX, 77370, USA
| | - Joshua Crapser
- Neuroscience Department, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT, 06030, USA
| | - Rajkumar Verma
- Neuroscience Department, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT, 06030, USA
| | - Anita R Patel
- Neuroscience Department, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT, 06030, USA
| | - Brittany E Knight
- Neuroscience Department, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT, 06030, USA
| | - Nia Harris
- Neuroscience Department, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT, 06030, USA
| | - Nickolas Mancini
- Neuroscience Department, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT, 06030, USA
| | - Meaghan Roy-O'Reilly
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin Street, Houston, TX, 77370, USA
| | - Bhanu Priya Ganesh
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin Street, Houston, TX, 77370, USA
| | - Fudong Liu
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin Street, Houston, TX, 77370, USA
| | - Louise D McCullough
- Department of Neurology, McGovern Medical School, University of Texas Health Science Center, 6431 Fannin Street, Houston, TX, 77370, USA.
| |
Collapse
|
7
|
Liu C, Shen Y, Tang Y, Gu Y. The role of N-glycosylation of CD200-CD200R1 interaction in classical microglial activation. JOURNAL OF INFLAMMATION-LONDON 2018; 15:28. [PMID: 30574022 PMCID: PMC6300008 DOI: 10.1186/s12950-018-0205-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 12/10/2018] [Indexed: 01/09/2023]
Abstract
Background Microglial inflammatory activation is the common feature of the central nervous system (CNS) diseases. Microglia can be activated and particularly polarized toward a dual role in the injured CNS. The CD200 receptor 1 (CD200R1) inhibits inflammatory microglia activation as illustrated by studies. Publications show abnormal activation of microglia secondary to the deficient inhibit of CD200-CD200R interaction. In the present study, we established a neuronal-microglia co-culture system to investigate the association between CD200R1 engagement and classical microglial activation. We analyzed the glycosylation of CD200R1 and the CD200 binding. Secretion of pro-inflammatory cytokines were measured. Results CD200R1 was N-glycosylated at Asparagine 44 (Asn44, N44). Mutation of this site disrupted CD200-CD200R1 interaction and up-regulated the expression of cytokines iNOS, CD86, IL-1β and TNF-α. Conclusion N44 of CD200R1 is a significant binding site for CD200-CD200R1 interaction and play a critical role in the maintenance of microglia. The N-glycosylation of CD200R1 could serve as a therapeutic agent for CNS inflammation. Electronic supplementary material The online version of this article (10.1186/s12950-018-0205-8) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Chao Liu
- Central Lab, First People's Hospital of Wujiang Dist, Suzhou, 215200 Jiangsu Province China
| | - Yifen Shen
- Central Lab, First People's Hospital of Wujiang Dist, Suzhou, 215200 Jiangsu Province China
| | - Ying Tang
- Central Lab, First People's Hospital of Wujiang Dist, Suzhou, 215200 Jiangsu Province China
| | - Yongchun Gu
- Central Lab, First People's Hospital of Wujiang Dist, Suzhou, 215200 Jiangsu Province China.,2Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, 136 Hanzhong Road, Nanjing, 210029 Jiangsu Province China
| |
Collapse
|
8
|
Xia L, Xie X, Liu Y, Luo X. Peripheral Blood Monocyte Tolerance Alleviates Intraperitoneal Lipopolysaccharides-Induced Neuroinflammation in Rats Via Upregulating the CD200R Expression. Neurochem Res 2017; 42:3019-3032. [DOI: 10.1007/s11064-017-2334-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 05/01/2017] [Accepted: 06/16/2017] [Indexed: 01/17/2023]
|
9
|
Kobayashi K, Yano H, Umakoshi A, Matsumoto S, Mise A, Funahashi Y, Ueno Y, Kamei Y, Takada Y, Kumon Y, Ohnishi T, Tanaka J. A Truncated form of CD200 (CD200S) Expressed on Glioma Cells Prolonged Survival in a Rat Glioma Model by Induction of a Dendritic Cell-Like Phenotype in Tumor-Associated Macrophages. Neoplasia 2017; 18:229-41. [PMID: 27108386 PMCID: PMC4840271 DOI: 10.1016/j.neo.2016.02.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 02/08/2016] [Accepted: 02/15/2016] [Indexed: 12/03/2022] Open
Abstract
CD200 induces immunosuppression in myeloid cells expressing its receptor CD200R, which may have consequences for tumor immunity. We found that human carcinoma tissues express not only full-length CD200 (CD200L) but also its truncated form, CD200S. Although CD200S is reported to antagonize the immunosuppressive actions of CD200L, the role of CD200S in tumor immunity has never been investigated. We established rat C6 glioma cell lines that expressed either CD200L or CD200S; the original C6 cell line did not express CD200 molecules. The cell lines showed no significant differences in growth. Upon transplantation into the neonatal Wistar rat forebrain parenchyma, rats transplanted with C6-CD200S cells survived for a significantly longer period than those transplanted with the original C6 and C6-CD200L cells. The C6-CD200S tumors were smaller than the C6-CD200L or C6-original tumors, and many apoptotic cells were found in the tumor cell aggregates. Tumor-associated macrophages (TAMs) in C6-CD200S tumors displayed dendritic cell (DC)-like morphology with multiple processes and CD86 expression. Furthermore, CD3+, CD4+ or CD8+ cells were more frequently found in C6-CD200S tumors, and the expression of DC markers, granzyme, and perforin was increased in C6-CD200S tumors. Isolated TAMs from original C6 tumors were co-cultured with C6-CD200S cells and showed increased expression of DC markers. These results suggest that CD200S activates TAMs to become DC-like antigen presenting cells, leading to the activation of CD8+ cytotoxic T lymphocytes, which induce apoptotic elimination of tumor cells. The findings on CD200S action may provide a novel therapeutic modality for the treatment of carcinomas.
Collapse
Affiliation(s)
- Kana Kobayashi
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan; Department of Hepato-biliary pancreatic surgery and breast surgery, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Hajime Yano
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Akihiro Umakoshi
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Shirabe Matsumoto
- Department of Regeneration of Community Medicine, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Ayano Mise
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Yu Funahashi
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Yoshitomo Ueno
- Department of Hepato-biliary pancreatic surgery and breast surgery, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Yoshiaki Kamei
- Department of Hepato-biliary pancreatic surgery and breast surgery, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Yasutsugu Takada
- Department of Hepato-biliary pancreatic surgery and breast surgery, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Yoshiaki Kumon
- Department of Regeneration of Community Medicine, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Takanori Ohnishi
- Department of Neurosurgery, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan
| | - Junya Tanaka
- Department of Molecular and Cellular Physiology, Graduate School of Medicine, Ehime University, Toon, Ehime, Japan.
| |
Collapse
|
10
|
Xie X, Luo X, Liu N, Li X, Lou F, Zheng Y, Ren Y. Monocytes, microglia, and CD200-CD200R1 signaling are essential in the transmission of inflammation from the periphery to the central nervous system. J Neurochem 2017; 141:222-235. [PMID: 28164283 DOI: 10.1111/jnc.13972] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 01/27/2017] [Accepted: 01/30/2017] [Indexed: 01/05/2023]
Abstract
Peripheral inflammation is known to trigger neuroinflammation and neurodegenerative disease. However, the key components during the propagation of inflammation from the periphery to the central nervous system (CNS) remain unclear. Lipopolysaccharide (LPS) was administered to Sprague-Dawley rats to induce peripheral inflammation. An intravenous injection and an intranigral injection of clodronate liposomes were given to deplete monocytes and microglia, respectively. Recombinant CD200 fusion protein (CD200Fc) or an anti-CD200R1 antibody was injected into the substantia nigra to manipulate the involvement of CD200 and CD200R1. Immunohistochemistry and immunofluorescence staining were used to measure microglial activation and dopaminergic neuronal loss. The expression of brain pro-inflammatory cytokines (i.e., tumor necrosis factor alpha, IL-1β) and CD200-CD200R1 signaling were measured by quantitative RT-PCR. Our data showed that the peripheral LPS injection activated the microglia and induced an increase in the levels of pro-inflammatory cytokines (i.e., tumor necrosis factor alpha, IL-1β). The depletion of either monocytes or microglia suppressed these inflammatory effects that were induced by peripheral LPS administration. The peripheral LPS injection increased the expression of CD200 and CD200R1 in the substantia nigra. Dopaminergic neuronal loss induced by the peripheral LPS injection was accelerated by the blockade of CD200-CD200R1 signaling with an anti-CD200R1 antibody and attenuated by intensifying the signaling with CD200Fc. These results highlight the importance of monocytes, microglia, and CD200-CD200R1 signaling in the transmission of inflammation from the periphery to the CNS.
Collapse
Affiliation(s)
- Xin Xie
- Department of Neurology, First Affiliated Hospital of China Medical University, Shenyang, China
| | - Xiaoguang Luo
- Department of Neurology, First Affiliated Hospital of China Medical University, Shenyang, China
| | - Na Liu
- Department of Neurology, First Affiliated Hospital of China Medical University, Shenyang, China
| | - Xiaohong Li
- Department of Neurology, First Affiliated Hospital of China Medical University, Shenyang, China
| | - Fan Lou
- Department of Neurology, First Affiliated Hospital of China Medical University, Shenyang, China
| | - Yumin Zheng
- Department of Neurology, First Affiliated Hospital of China Medical University, Shenyang, China
| | - Yan Ren
- Department of Neurology, First Affiliated Hospital of China Medical University, Shenyang, China
| |
Collapse
|
11
|
Jin H, Jeon S, Kang GY, Lee HJ, Cho J, Lee YS. Identification of radiation response genes and proteins from mouse pulmonary tissues after high-dose per fraction irradiation of limited lung volumes. Int J Radiat Biol 2016; 93:184-193. [DOI: 10.1080/09553002.2017.1235297] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Hee Jin
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Korea
| | - Seulgi Jeon
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Korea
| | - Ga-Young Kang
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Korea
| | - Hae-June Lee
- Division of Radiation Effects, Korea Institute of Radiological & Medical Sciences, Seoul, Korea
| | - Jaeho Cho
- Department of Radiation Oncology, Yonsei University Health System, Seoul, Korea
| | - Yun-Sil Lee
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul, Korea
| |
Collapse
|
12
|
Clark DA, Arredondo JL, Dhesy-Thind S. The CD200 tolerance-signaling molecule and its receptor, CD200R1, are expressed in human placental villus trophoblast and in peri-implant decidua by 5 weeks' gestation. J Reprod Immunol 2015; 112:20-3. [PMID: 26123445 DOI: 10.1016/j.jri.2015.05.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 05/21/2015] [Accepted: 05/26/2015] [Indexed: 11/25/2022]
Abstract
CD200 expression in murine trophoblast and decidua prevents semi-allogeneic and LPS-induced abortions by binding to CD200 receptor-bearing cells to suppress NK activity, induces IDO in macrophages, and promotes the generation of regulatory T cell subsets. CD200 and its receptor CD200R1 reported in 7-9 weeks' gestation human villus trophoblasts are reduced in spontaneous abortion syncytiotrophoblasts. By specific antibody staining, we find that both CD200 and CD200R1 are expressed even earlier, by 5 weeks' gestation, by villus trophoblasts and by decidual cells. Expression of CD200 was validated using two independent antibodies. CD200-CD200R1 signaling may be required for human pregnancy success.
Collapse
Affiliation(s)
- David A Clark
- Department of Medicine, McMaster University, Health Sciences Center Rm. 3H1E, 1280 Main St. West, Hamilton, Ontario, Canada L8S 4K1; Toronto General Research Institute, Toronto, Ontario, Canada; Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada.
| | - Jorge L Arredondo
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | | |
Collapse
|
13
|
Clark DA, Dhesy-Thind S, Arredondo JL, Ellis PM, Ramsay JA. The Receptor for the CD200 Tolerance-Signaling Molecule Associated with Successful Pregnancy is Expressed by Early-Stage Breast Cancer Cells in 80% of Patients and by Term Placental Trophoblasts. Am J Reprod Immunol 2015; 74:387-91. [DOI: 10.1111/aji.12403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 05/05/2015] [Indexed: 11/27/2022] Open
Affiliation(s)
- David A. Clark
- Department of Medicine; McMaster University; Health Sciences Center Rm 3H1E; Hamilton ON Canada
- Department of Molecular Medicine & Pathology; McMaster University; Hamilton ON Canada
- Affiliate Scientist; Toronto General Research Institute; Toronto ON Canada
| | - Sukhbinder Dhesy-Thind
- Department of Oncology; McMaster University and Juravinski Cancer Center; Hamilton ON Canada
| | - Jorge L. Arredondo
- Department of Molecular Medicine & Pathology; McMaster University; Hamilton ON Canada
| | - Peter M. Ellis
- Department of Oncology; McMaster University and Juravinski Cancer Center; Hamilton ON Canada
| | - Jennifer A. Ramsay
- Department of Molecular Medicine & Pathology; McMaster University; Hamilton ON Canada
| |
Collapse
|
14
|
Moertel CL, Xia J, LaRue R, Waldron NN, Andersen BM, Prins RM, Okada H, Donson AM, Foreman NK, Hunt MA, Pennell CA, Olin MR. CD200 in CNS tumor-induced immunosuppression: the role for CD200 pathway blockade in targeted immunotherapy. J Immunother Cancer 2014; 2:46. [PMID: 25598973 PMCID: PMC4296547 DOI: 10.1186/s40425-014-0046-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2014] [Accepted: 12/04/2014] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Immunological quiescence in the central nervous system (CNS) is a potential barrier to immune mediated anti-tumor response. One suppressive mechanism results from the interaction of parenchyma-derived CD200 and its receptor on myeloid cells. We suggest that CD200/CD200R interactions on myeloid cells expand the myeloid-derived suppressor cell (MDSC) population and that blocking tumor-derived CD200 will enhance the efficacy of immunotherapy. METHODS CD200 mRNA expression levels in human brain tumor tissue samples were measured by microarray. The amount of circulating CD200 protein in the sera of patients with brain tumors was determined by ELISA and, when corresponding peripheral blood samples were available, was correlated quantitatively with MDSCs. CD200-derived peptides were used as competitive inhibitors in a mouse model of glioblastoma immunotherapy. RESULTS CD200 mRNA levels were measured in human brain tumors, with different expression levels being noted among the sub groups of glioblastoma, medulloblastoma and ependymoma. Serum CD200 concentrations were highest in patients with glioblastoma and correlated significantly with MDSC expansion. Similarly, in vitro studies determined that GL261 cells significantly expanded a MDSC population. Interestingly, a CD200R antagonist inhibited the expansion of murine MDSCs in vitro and in vivo. Moreover, inclusion of CD200R antagonist peptide in glioma tumor lysate-derived vaccines slowed tumor growth and significantly enhanced survival. CONCLUSION These data suggest that CNS-derived tumors can evade immune surveillance by engaging CD200. Because of the homology between mouse and human CD200, our data also suggest that blockade of CD200 binding to its receptor will enhance the efficacy of immune mediated anti-tumor strategies for brain tumors.
Collapse
Affiliation(s)
- Christopher L Moertel
- />Department of Pediatrics, hematology/oncology, University of Minnesota, Minneapolis, MN 55455 USA
| | - Junzhe Xia
- />Department of Pediatrics, hematology/oncology, University of Minnesota, Minneapolis, MN 55455 USA
- />Department of Neurosurgery, Hospital Number 1 of China Medical University, Shenyang, China
| | - Rebecca LaRue
- />Department of Pediatrics, hematology/oncology, University of Minnesota, Minneapolis, MN 55455 USA
| | - Nate N Waldron
- />Department of Pediatrics, hematology/oncology, University of Minnesota, Minneapolis, MN 55455 USA
| | - Brian M Andersen
- />Department of Pediatrics, hematology/oncology, University of Minnesota, Minneapolis, MN 55455 USA
| | - Robert M Prins
- />Department of Neurosurgery, UCLA Medical Center, Los Angeles, CA 90095 USA
| | - Hideho Okada
- />Department of Neurosurgery, University of California San Francisco, San Francisco, CA 94158 USA
| | - Andrew M Donson
- />Department of Pediatrics, University of Colorado, Denver Anschutz Medical Center, Aurora, CO 80045 USA
| | - Nicholas K Foreman
- />Department of Pediatrics, University of Colorado, Denver Anschutz Medical Center, Aurora, CO 80045 USA
| | - Matthew A Hunt
- />Department of Neurosurgery, University of Minnesota, Minneapolis, MN 55455 USA
| | | | - Michael R Olin
- />Department of Pediatrics, hematology/oncology, University of Minnesota, Minneapolis, MN 55455 USA
| |
Collapse
|
15
|
Addressing the Inflammatory Response to Clinically Relevant Polymers by Manipulating the Host Response Using ITIM Domain-Containing Receptors. Polymers (Basel) 2014; 6:2526-2551. [PMID: 25705515 PMCID: PMC4333742 DOI: 10.3390/polym6102526] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Tissue contacting surfaces of medical devices initiate a host inflammatory response, characterized by adsorption of blood proteins and inflammatory cells triggering the release of cytokines, reactive oxygen species (ROS) and reactive nitrogen species (RNS), in an attempt to clear or isolate the foreign object from the body. This normal host response contributes to device-associated pathophysiology and addressing device biocompatibility remains an unmet need. Although widespread attempts have been made to render the device surfaces unreactive, the establishment of a completely bioinert coating has been untenable and demonstrates the need to develop strategies based upon the molecular mechanisms that define the interaction between host cells and synthetic surfaces. In this review, we discuss a family of transmembrane receptors, known as immunoreceptor tyrosine-based inhibitory motif (ITIM)-containing receptors, which show promise as potential targets to address aberrant biocompatibility. These receptors repress the immune response and ensure that the intensity of an immune response is appropriate for the stimuli. Particular emphasis will be placed on the known ITIM-containing receptor, Signal Regulatory Protein Alpha (SIRPhα), and its cognate ligand CD47. In addition, this review will discuss the potential of other ITIM-containing proteins as targets for addressing the aberrant biocompatibility of polymeric biomaterials.
Collapse
|
16
|
The transcriptomic response of rat hepatic stellate cells to endotoxin: implications for hepatic inflammation and immune regulation. PLoS One 2013; 8:e82159. [PMID: 24349206 PMCID: PMC3857241 DOI: 10.1371/journal.pone.0082159] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Accepted: 10/26/2013] [Indexed: 12/13/2022] Open
Abstract
With their location in the perisinusoidal space of Disse, hepatic stellate cells (HSCs) communicate with all of the liver cell types both by physical association (cell body as well as cytosolic processes penetrating into sinusoids through the endothelial fenestrations) and by producing several cytokines and chemokines. Bacterial lipopolysaccharide (LPS), circulating levels of which are elevated in liver diseases and transplantation, stimulates HSCs to produce increased amounts of cytokines and chemokines. Although recent research provides strong evidence for the role of HSCs in hepatic inflammation and immune regulation, the number of HSC-elaborated inflammatory and immune regulatory molecules may be much greater then known at the present time. Here we report time-dependent changes in the gene expression profile of inflammatory and immune-regulatory molecules in LPS-stimulated rat HSCs, and their validation by biochemical analyses. LPS strongly up-regulated LPS-response elements (TLR2 and TLR7) but did not affect TLR4 and down-regulated TLR9. LPS also up-regulated genes in the MAPK, NFκB, STAT, SOCS, IRAK and interferon signaling pathways, numerous CC and CXC chemokines and IL17F. Interestingly, LPS modulated genes related to TGFβ and HSC activation in a manner that would limit their activation and fibrogenic activity. The data indicate that LPS-stimulated HSCs become a major cell type in regulating hepatic inflammatory and immunological responses by altering expression of numerous relevant genes, and thus play a prominent role in hepatic pathophysiology including liver diseases and transplantation.
Collapse
|
17
|
Kacerovsky M, Drahosova M, Krejsek J, Musilova I, Hornychova H, Matula V, Simetka O, Jacobsson B, Andrys C. Amniotic fluid CD200 levels in pregnancies complicated by preterm prelabor rupture of the membranes. J Matern Fetal Neonatal Med 2013; 26:1416-24. [PMID: 23489112 DOI: 10.3109/14767058.2013.785517] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
OBJECTIVE To determine the amniotic fluid CD200 levels in uncomplicated pregnancies and in preterm prelabor rupture of the membranes (PPROM) according to microbial invasion of the amniotic cavity and histological chorioamnionitis and its association with neonatal outcomes. METHODS One hundred and fifty-nine women with singleton pregnancies were included in this study. Amniotic fluid was collected, and CD200 levels were determined using ELISA. RESULTS No difference was found in CD200 levels between women in the second trimester and women at term without labor. Women at term with labor had higher CD200 levels than women in the second trimester and women at term without labor. The presence of funisitis in PPROM pregnancies was associated with higher CD200 levels independent of gestational age (with funisitis: median 197.5 pg/mL versus without funisitis: median 61.0 pg/mL; p = 0.003). The need for tracheal intubation and the development of bronchopulmonary dysplasia were associated with higher CD200 levels. CONCLUSIONS Amniotic fluid CD200 levels remained stable in advanced pregnancy and they were increased during parturition. Elevated CD200 levels in the presence of funisitis suggest the involvement of negative regulatory mechanisms of innate immunity. CD200 may play a role in the development of pulmonary aspects of neonatal morbidity.
Collapse
Affiliation(s)
- Marian Kacerovsky
- Biomedical Research Center, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic.
| | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Darmochwal-Kolarz D, Serafin A, Tabarkiewicz J, Kolarz B, Rolinski J, Oleszczuk J. The expressions of co-stimulatory molecules are altered on putative antigen-presenting cells in cord blood. Am J Reprod Immunol 2012; 69:180-7. [PMID: 23066977 DOI: 10.1111/aji.12031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Accepted: 09/17/2012] [Indexed: 11/30/2022] Open
Abstract
PROBLEM The aim of our study was to estimate the expressions of both B7-H1 and B7-H4 as well as CD200 and CD200R co-stimulatory molecules on immature myeloid and lymphoid dendritic cells, B CD19(+) lymphocytes and monocytes in umbilical cord blood of healthy neonates and in peripheral blood of healthy adults. METHOD OF STUDY Thirty-nine healthy full-term neonates from physiological single pregnancies and 27 healthy adults were included in the study. The expressions of B7-H1, B7-H4, CD200, CD200R antigens were estimated using flow cytometry. Statistical analysis was performed using a non-parametric Mann-Whitney U-test and parametric Wilcoxon's test. RESULTS The expressions of B7-H1 and B7-H4 molecules on immature BDCA-1(+) myeloid dendritic cells were significantly lower in umbilical cord blood of healthy neonates when compared with those cells in peripheral blood of healthy adults (P < 0.0001). Furthermore, the suppression of B7-H4 molecule on BDCA-2(+) lymphoid dendritic cells was observed in cord blood of healthy neonates when compared with peripheral blood of healthy adults (P < 0.02). The expressions of CD200 antigen on BDCA-1(+) cells, CD200R antigen on BDCA-2(+) cells and CD200R antigen on B CD19(+) cells were significantly lower in cord blood of healthy neonates. On the other hand, the expressions of CD200 and CD200R as well as B7-H4 co-stimulatory molecules on CD14(+) cells were significantly higher in cord blood when compared with peripheral blood. CONCLUSION The increased percentages of CD14(+) monocytes with the expressions of CD200 and CD200R as well as B7-H4 co-stimulatory molecules can suggest the increased immunomodulatory properties of neonatal monocytes in cord blood.
Collapse
|
19
|
Clark DA, Chaouat G. Regulatory T cells and reproduction: how do they do it? J Reprod Immunol 2012; 96:1-7. [PMID: 23021867 DOI: 10.1016/j.jri.2012.07.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Revised: 07/04/2012] [Accepted: 07/05/2012] [Indexed: 01/09/2023]
Abstract
Regulatory T cells (Treg cells) identified by expression of Foxp3 play an important role in successful implantation and gestation. Various mechanisms have been proposed to explain their actions, and the more credible and less credible are set out in this review. Induction of Treg cells is believed to occur in response to paternal antigens in seminal plasma at the time of mating, and these Treg cells home to the uterus prior to implantation. Tolerogenic dendritic cells are proposed to play an important role in the generation of Treg cells in the draining lymph nodes and in maintaining Treg activity in the uterus. Recent data indicate that abortion in the CBAxDBA/2 model may be prevented by seminal plasma antigens from DBA/2 and BALB/c males, but H-2(d) restriction suggests that presentation to Treg cells might occur via a novel mechanism. The relevance of findings in mice to human pregnancy problems is also discussed.
Collapse
Affiliation(s)
- David A Clark
- Departments of Medicine, Molecular Medicine and Pathology, Obstetrics and Gynecology, McMaster University, Health Sciences Centre Rm 3H1E, Hamilton, Ontario, Canada L8S 4K1.
| | | |
Collapse
|
20
|
Characterization and functionality of the CD200-CD200R system during mesenchymal stromal cell interactions with T-lymphocytes. Immunol Lett 2012; 146:50-6. [PMID: 22575528 DOI: 10.1016/j.imlet.2012.04.017] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 04/02/2012] [Accepted: 04/23/2012] [Indexed: 02/07/2023]
Abstract
Mesenchymal stromal cells (MSCs) possess a specific immunological profile that makes them potentially useful for immune-based therapies. Adipose tissue (AT) and Wharton's jelly (WJ) are considered to be valuable alternatives to bone marrow (BM) as sources of MSCs. These MSCs exhibit strong immunomodulatory properties that affect lymphocyte responses. The CD200/CD200R axis has been reported to be important in regulating the immune responses. Engagement of CD200R by CD200 initiates an inhibitory pathway that displays immunosuppressive effects. Because the CD200/CD200R axis is involved in immunoregulation, we investigated the expression and role of this ligand/receptor pair in MSCs and T-lymphocytes during co-culture. CD200 is differently expressed and modulated on MSCs depending on the tissue of origin and the culture conditions. Among the different MSC sources, WJ-MSCs express CD200 in the greatest proportion. This high constitutive CD200 expression may represent a distinctive marker for WJ-MSCs. A pro-inflammatory environment and IFN-γ in particular induce an increase in CD200 expression by BM-MSCs. In T-lymphocytes, CD200R and CD200 are differently distributed between the CD4(+) and CD8(+) T-cell subsets. During co-culture, blocking CD200-CD200R interactions does not prevent MSC-mediated inhibition of lymphocyte proliferation. However, depending on their origin, MSCs are able to modulate the expression of both CD200 and CD200R on some T-cells. Further study is required to understand the function of CD200 expression by nonmyeloid cells such MSCs and the significance of CD200 and C200R expression by T-cells. The findings presented here support bidirectional communication between MSCs and T-lymphocytes. Understanding the role of this ligand-receptor pair during co-culture will improve and increase the clinical use of MSCs.
Collapse
|
21
|
Darmochwal-Kolarz DA, Kludka-Sternik M, Chmielewski T, Kolarz B, Rolinski J, Leszczynska-Gorzelak B, Oleszczuk J. The expressions of CD200 and CD200R molecules on myeloid and lymphoid dendritic cells in pre-eclampsia and normal pregnancy. Am J Reprod Immunol 2012; 67:474-81. [PMID: 22462561 DOI: 10.1111/j.1600-0897.2012.01126.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 02/19/2012] [Indexed: 11/26/2022] Open
Abstract
PROBLEM The purpose of our study was to test the hypothesis that the expressions of CD200 and CD200R tolerance molecules are increased on peripheral blood dendritic cells (DCs) in normal pregnancy and decreased on peripheral blood DCs in pre-eclampsia. METHOD OF STUDY Thirty-three patients with pre-eclampsia, 38 normal pregnant women, and 10 healthy non-pregnant women were included in the study. Dendritic cells were isolated from peripheral blood, stained with monoclonal antibodies against blood dendritic cell antigens as well as CD200 and CD200R antigens, and estimated using flow cytometry. RESULTS The expressions of CD200 and CD200R molecules on CD1c(+) myeloid and BDCA-2(+) lymphoid DCs in the first trimester of normal pregnancy were significantly higher when compared to the luteal phase of the ovarian cycle. The expressions of CD200 molecule on CD1c(+) myeloid DCs were significantly lower in the third trimester of normal pregnancy when compared to the second trimester. The expressions of CD200R molecule on CD1c(+) myeloid DCs and BDCA-2(+) lymphoid DCs did not differ in pre-eclampsia and healthy third trimester pregnant women. However, the expressions of CD200 molecule on CD1c(+) myeloid and BDCA-2(+) lymphoid DCs were significantly higher in pre-eclampsia when compared to the healthy third trimester pregnant women. CONCLUSION The results suggest increased tolerogenic properties of myeloid and lymphoid DCs in normal human pregnancy. Moreover, they suggest a decrease in tolerogenic properties of DCs before delivery. It seems possible that higher expressions of CD200 molecule on CD1c(+) myeloid and BDCA-2(+) lymphoid DCs in pre-eclampsia may constitute the tolerogenic mechanism secondary to the pro-inflammatory response that is observed in this syndrome.
Collapse
|
22
|
Berencsi G, Takács M. Barriers of the Human Organism and Their Achilles’ Heels. MATERNAL FETAL TRANSMISSION OF HUMAN VIRUSES AND THEIR INFLUENCE ON TUMORIGENESIS 2012. [PMCID: PMC7121758 DOI: 10.1007/978-94-007-4216-1_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The human body is covered by barriers separating it from the external and internal surroundings. The “milieu enterieur” has to be stabilised in spite of the variable external and internal conditions of toxic, osmotic, microbial and climatic environmental circumstances. This first line of barriers is composed of skin and mucous membranes of complicated structures. A second line of barrier system is present in our organisms. Certain organs have to be separated from the immune system and other parts of the body because of evolutionary reasons (eye-bulb and testicles) because of unique proteins “unknown” for the acquired immune system. The blood-brain barrier (BBB) is providing enhanced safety circumstances for the central nervous system. The second line of barriers is represented by the special properties of the capillary endothelial system. The maternal-fetal barrier is the most complex. At the maternal fetal interface two individuals of two different haplotypes has to be live 9 months separated by a very complicated dynamic barrier. The placenta is the organ, which is separating the maternal and fetal tissues. Similar to others the bidirectional transport of gasses, metabolites, cells, proteins, regulatory substances, are transported by active or passive transcellular and intercellular mechanisms. The fetal immune system develops immunotolerance to all maternal cells and antigens transferred transplacentally. The problem is to mitigate the maternal immune system to tolerate the paternal haplotype of the fetus. In the case of normal pregnancy a complex series of physiological modifications can solve the problem without harmful consequences to the mother and fetus. The outermost contact cells of trophoblasts express instead of HLA-class Ia and class II antigens non-variable HLA-C, HLA-E, HLA-F and HLA-G antigens. The first consequence of this is reduction of the activity of maternal natural killer cells and maternal dendritic cells; Progesteron, micro-RNA and mediators influence the development of T effector-cells. The production of soluble HLA-G(5 and 6) and IL-10 supports the differentiation of Th-2 CD4+ helper cells, reducing the ability of maternal cells to kill fetal cells. Series of receptors and costimulators are expressed by the different lines of semi-allogenic trophoblast cells to bind HLA-G and mitigate maternal immune response; The maternal immunotolerance is further facilitated by the activation of CD4+CD25brightFoxp3+ regulatory T (TREG) cells. Infections have to be prevented during pregnancy. The cells of placenta express 10 Toll-like receptors a group of pattern recognition receptors responsible for innate immunity. The interferon level is also higher in the placental tissues than in the somatic fetal or maternal cells. The complement system is also adapted to the requirements of the pregnancy and fetal damage is inhibited by the production of “assymmetric IgG antibodies” under hormonal and placental-regulation. These modifications prevent the activation of complement, cytotoxic activity, opsonising ability, antigen clearance and precipitating activity of the molecules. The Achilles’ heels of the different barriers are regularly found by virus infections. Lamina cribrosa of the blood-brain barrier, optical nerve of the eyes, etc. the risk factors of the maternal-fetal barrier has been summarised in Table 1.1.
Collapse
|
23
|
Zhang S, Wang XJ, Tian LP, Pan J, Lu GQ, Zhang YJ, Ding JQ, Chen SD. CD200-CD200R dysfunction exacerbates microglial activation and dopaminergic neurodegeneration in a rat model of Parkinson's disease. J Neuroinflammation 2011; 8:154. [PMID: 22053982 PMCID: PMC3226566 DOI: 10.1186/1742-2094-8-154] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2011] [Accepted: 11/06/2011] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND Increasing evidence suggests that microglial activation may participate in the aetiology and pathogenesis of Parkinson's disease (PD). CD200-CD200R signalling has been shown to be critical for restraining microglial activation. We have previously shown that expression of CD200R in monocyte-derived macrophages, induced by various stimuli, is impaired in PD patients, implying an intrinsic abnormality of CD200-CD200R signalling in PD brain. Thus, further in vivo evidence is needed to elucidate the role of malfunction of CD200-CD200R signalling in the pathogenesis of PD. METHODS 6-hydroxydopamine (6-OHDA)-lesioned rats were used as an animal model of PD. CD200R-blocking antibody (BAb) was injected into striatum to block the engagement of CD200 and CD200R. The animals were divided into three groups, which were treated with 6-OHDA/Veh (PBS), 6-OHDA/CAb (isotype control antibody) or 6-OHDA/BAb, respectively. Rotational tests and immunohistochemistry were employed to evaluate motor deficits and dopaminergic neurodegeneration in animals from each group. HPLC analysis was used to measure monoamine levels in striatum. Morphological analysis and quantification of CD11b- (or MHC II-) immunoreactive cells were performed to investigate microglial activation and possible neuroinflammation in the substantia nigra (SN). Finally, ELISA was employed to assay protein levels of proinflammatory cytokines. RESULTS Compared with 6-OHDA/CAb or 6-OHDA/Veh groups, rats treated with 6-OHDA/BAb showed a significant increase in counts of contralateral rotation and a significant decrease in TH-immunoreactive (TH-ir) neurons in SN. A marked decrease in monoamine levels was also detected in 6-OHDA/BAb-treated rats, in comparison to 6-OHDA/Veh-treated ones. Furthermore, remarkably increased activation of microglia as well as up-regulation of proinflammatory cytokines was found concomitant with dopaminergic neurodegeneration in 6-OHDA/BAb-treated rats. CONCLUSIONS This study shows that deficits in the CD200-CD200R system exacerbate microglial activation and dopaminergic neurodegeneration in a 6-OHDA-induced rat model of PD. Our results suggest that dysfunction of CD200-CD200R signalling may be involved in the aetiopathogenesis of PD.
Collapse
Affiliation(s)
- Shi Zhang
- Department of Neurology & Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, 197 Ruijin Er Road, Shanghai, P.R. China
| | | | | | | | | | | | | | | |
Collapse
|
24
|
Winger EE, Reed JL, Ashoush S, El-Toukhy T, Ahuja S, Taranissi M. Elevated Preconception CD56+16+ and/or Th1:Th2 Levels Predict Benefit from IVIG Therapy in Subfertile Women Undergoing IVF. Am J Reprod Immunol 2011; 66:394-403. [DOI: 10.1111/j.1600-0897.2011.01018.x] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
|
25
|
Clark DA, Chaouat G, Wong K, Gorczynski RM, Kinsky R. REVIEW ARTICLE: Tolerance Mechanisms in Pregnancy: A Reappraisal of the Role of Class I Paternal MHC Antigens*. Am J Reprod Immunol 2009; 63:93-103. [DOI: 10.1111/j.1600-0897.2009.00774.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
26
|
Clark DA. ORIGINAL ARTICLE: Cell-Surface CD200 May Predict Efficacy of Paternal Mononuclear Leukocyte Immunotherapy in Treatment of Human Recurrent Pregnancy Loss. Am J Reprod Immunol 2008; 61:75-84. [DOI: 10.1111/j.1600-0897.2008.00665.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
|
27
|
Khatri I, Alexander C, Brandenburg K, Fournier K, Lee L, Mach J, Rietschel E, Ulmer A, Waelli T, Gorczynski R. A role for altered TLR gene expression in association with increased expression of CD200R in the induction of mucosal tissue CD4+ Treg in aged mice following gavage with a liver extract along with intramuscular monophosphoryl lipid A (MPLA) injection. Exp Gerontol 2008; 43:771-81. [DOI: 10.1016/j.exger.2008.05.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2008] [Revised: 04/16/2008] [Accepted: 05/06/2008] [Indexed: 12/30/2022]
|
28
|
Siva A, Xin H, Qin F, Oltean D, Bowdish KS, Kretz-Rommel A. Immune modulation by melanoma and ovarian tumor cells through expression of the immunosuppressive molecule CD200. Cancer Immunol Immunother 2008; 57:987-96. [PMID: 18060403 PMCID: PMC11030565 DOI: 10.1007/s00262-007-0429-6] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2007] [Accepted: 11/13/2007] [Indexed: 01/20/2023]
Abstract
BACKGROUND AND OBJECTIVE Immune escape by tumors can occur by multiple mechanisms, each a significant barrier to immunotherapy. We previously demonstrated that upregulation of the immunosuppressive molecule CD200 on chronic lymphocytic leukemia cells inhibits Th1 cytokine production required for an effective cytotoxic T cell response. CD200 expression on human tumor cells in animal models prevents human lymphocytes from rejecting the tumor; treatment with an antagonistic anti-CD200 antibody restored lymphocyte-mediated tumor growth inhibition. The current study evaluated CD200 expression on solid cancers, and its effect on immune response in vitro. METHODS AND RESULTS CD200 protein was expressed on the surface of 5/8 ovarian cancer, 2/4 melanoma, 2/2 neuroblastoma and 2/3 renal carcinoma cell lines tested, but CD200 was absent on prostate, lung, breast, astrocytoma, or glioblastoma cell lines. Evaluation of patient samples by immunohistochemistry showed strong, membrane-associated CD200 staining on malignant cells of melanoma (4/4), ovarian cancer (3/3) and clear cell renal cell carcinoma (ccRCC) (2/3), but also on normal ovary and kidney. CD200 expression on melanoma metastases was determined by RT-QPCR, and was found to be significantly higher in jejunum metastases (2/2) and lung metastases (2/6) than in normal samples. Addition of CD200-expressing, but not CD200-negative solid tumor cell lines to mixed lymphocyte reactions downregulated the production of Th1 cytokines. Inclusion of antagonistic anti-CD200 antibody restored Th1 cytokine responses. CONCLUSION These data suggest that melanoma, ccRCC and ovarian tumor cells can express CD200, thereby potentially suppressing anti-tumor immune responses. CD200 blockade with an antagonistic antibody may permit an effective anti-tumor immune response in these solid tumor types.
Collapse
Affiliation(s)
- A. Siva
- Alexion Antibody Technologies, Inc., 3985 Sorrento Valley Blvd, Ste A, San Diego, CA 92121 USA
| | - H. Xin
- Alexion Antibody Technologies, Inc., 3985 Sorrento Valley Blvd, Ste A, San Diego, CA 92121 USA
| | - F. Qin
- Alexion Antibody Technologies, Inc., 3985 Sorrento Valley Blvd, Ste A, San Diego, CA 92121 USA
| | - D. Oltean
- Alexion Antibody Technologies, Inc., 3985 Sorrento Valley Blvd, Ste A, San Diego, CA 92121 USA
| | - K. S. Bowdish
- Alexion Antibody Technologies, Inc., 3985 Sorrento Valley Blvd, Ste A, San Diego, CA 92121 USA
| | - A. Kretz-Rommel
- Alexion Antibody Technologies, Inc., 3985 Sorrento Valley Blvd, Ste A, San Diego, CA 92121 USA
| |
Collapse
|
29
|
Gorczynski R, Boudakov I, Khatri I. Peptides of CD200 Modulate LPS-Induced TNF-α Induction and Mortality In Vivo. J Surg Res 2008; 145:87-96. [DOI: 10.1016/j.jss.2007.04.043] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2006] [Revised: 04/19/2007] [Accepted: 04/25/2007] [Indexed: 10/22/2022]
|
30
|
Kretz-Rommel A, Bowdish KS. Rationale for anti-CD200 immunotherapy in B-CLL and other hematologic malignancies: new concepts in blocking immune suppression. Expert Opin Biol Ther 2008; 8:5-15. [PMID: 18081533 DOI: 10.1517/14712598.8.1.5] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Immune evasion in cancer is increasingly recognized as a contributing factor in the failure of a natural host antitumor immune response as well as in the failure of cancer vaccine trials. Immune evasion may be the result of a number of factors, including expansion of regulatory T cells, production of immunosuppressive cytokines, downregulation of HLA class I and tumor-associated antigens and upregulation of immunosuppressive molecules on the surface of tumor cells. CD200, a cell surface ligand that plays a role in regulating the immune system, has been shown to be upregulated on the surface of some hematologic and solid tumor malignancies. This review characterizes the role of CD200 in immune suppression, and describes strategies to target this molecule in the oncology setting, thus directly modulating immune regulation and potentially altering tolerance to tumor antigens.
Collapse
|
31
|
Clark DA, Wong K, Banwatt D, Chen Z, Liu J, Lee L, Gorczynski RM, Blajchman MA. CD200-dependent and nonCD200-dependent pathways of NK cell suppression by human IVIG. J Assist Reprod Genet 2008; 25:67-72. [PMID: 18256920 DOI: 10.1007/s10815-008-9202-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2007] [Accepted: 01/14/2008] [Indexed: 11/26/2022] Open
Abstract
PROBLEM Intravenous immunoglobulin (IVIG) has been used to suppress autoimmune and inflammatory disorders by a variety of mechanisms. Recently, the CD200 tolerance-promoting signal has been found to play a role in IVIG suppression of blood natural killer (NK) cells. Further, different types of IVIG have been reported to differ in this activity, and that has been related to efficacy (and inefficacy) of treatment of women with pregnancy failure. CD200 acts by binding to CD200 receptors (C200R). The objective of this study was to determine if CD200-dependent NK suppression by IVIG involved direct binding of IVIG-associated CD200 molecules to CD200R on NK cells. METHOD OF STUDY Peripheral Blood Lymphocytes isolated from human blood were used as a source of NK cells to lyse Cr(51)-labelled K562 target cells in vitro in 18 and 4 h assays, and three different types of IVIG were tested for suppressive activity in the presence or absence of specific monoclonal anti-huCD200. In some experiments, CD56(+) NK cells were purified using anti-CD56 magnetic beads. Western blotting of IVIG using a specific anti-huCD200 antibody was done. Enzyme-Linked ImmunoSorbent Assays were used to measure cytokine production in NK assays. RESULTS Different IVIGs showed significant differences in potency in suppressing NK cytolytic activity in vitro (mg/ml for 60% suppression, Gammagard 4.1, Gamunex 14.1, Gamimmune 20.2). For CD200-dependent suppression, Gammagard was twice as potent as Gamimmune, but equivalent to Gamunex. The presence of suppression in 4 hour assays indicated stimulation of cytokine synthesis was unlikely to explain CD200-dependent suppression. Purification of NK cells led to loss of the CD200-dependent component. Western blotting confirmed that material reactive with anti-CD200 antibody was present in Immunoglobulin G (IgG) preparations, and at a lower level in human serum that contains IgG. CONCLUSIONS IVIGs are not all equipotent in suppressing NK cell cytolytic activity. CD200 associated with IVIG is an important component of suppression. CD200-dependent suppression appears to be mediated by a non-NK population that then acts on NK cells by direct contact rather than indirectly through release of immunosuppressive cytokines.
Collapse
Affiliation(s)
- David A Clark
- Department of Medicine, McMaster University, 1200 Main St. West., Hamilton, ON L8N 3Z5, Canada.
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Boudakov I, Liu J, Fan N, Gulay P, Wong K, Gorczynski RM. Mice lacking CD200R1 show absence of suppression of lipopolysaccharide-induced tumor necrosis factor-alpha and mixed leukocyte culture responses by CD200. Transplantation 2007; 84:251-7. [PMID: 17667818 DOI: 10.1097/01.tp.0000269795.04592.cc] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
BACKGROUND CD200:CD200R interactions deliver immunoregulatory signals. A family of CD200Rs (CD200R1-5) has been described, and engagement of CD200R1 by its ligand CD200 suppresses LPS-induced macrophage cytokine production, decreases alloimmune responses in vivo and in vitro, and suppresses collagen-induced arthritis. METHODS We generated C57BL/6 mice lacking the genomic exons encoding the extracellular domains of the CD200R1 molecule using transformation of ES cells and explored cell subtypes and immune responses in these mice. RESULTS Myeloid cells/splenocytes from CD200R1(-/-) mice were not stained in FACS by anti-CD200R1 mAb. Stimulation of splenic tumor necrosis factor-alpha production by lipopolysaccharide was enhanced relative to control (+/+) mice and was not suppressed by addition of exogenous CD200Fc. Modulation of alloreactivity in mixed leukocyte cultures by CD200Fc depended upon CD200R1+ stimulatory cells, although maximal immunoregulation by CD200Fc occurred only when CD200R1+ T responder cells also were used. CD200Fc failed to suppress graft rejection in CD200R1(-/-) mice. CONCLUSION CD200:CD200R1 plays an immunoregulatory role in vivo.
Collapse
MESH Headings
- Animals
- Antigens, Surface/genetics
- Antigens, Surface/immunology
- Blotting, Southern
- Cells, Cultured
- Disease Models, Animal
- Female
- Flow Cytometry
- Gene Expression
- Graft Rejection/immunology
- Graft Rejection/metabolism
- Graft Rejection/pathology
- Graft Survival
- Lipopolysaccharides/pharmacology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Knockout
- Myeloid Cells/metabolism
- Myeloid Cells/pathology
- Orexin Receptors
- RNA, Messenger/genetics
- Receptors, Cell Surface/deficiency
- Receptors, Cell Surface/genetics
- Receptors, Cell Surface/immunology
- Reverse Transcriptase Polymerase Chain Reaction
- Skin Transplantation/immunology
- Spleen/metabolism
- Spleen/pathology
- Transplantation, Homologous
- Tumor Necrosis Factor-alpha/biosynthesis
- Tumor Necrosis Factor-alpha/drug effects
Collapse
Affiliation(s)
- Ivo Boudakov
- University Health Network, Transplant Research Division, MaRS Medical Discovery Tower, Toronto, Ontario, Canada
| | | | | | | | | | | |
Collapse
|
33
|
Wang XJ, Ye M, Zhang YH, Chen SD. CD200–CD200R Regulation of Microglia Activation in the Pathogenesis of Parkinson’s Disease. J Neuroimmune Pharmacol 2007; 2:259-64. [DOI: 10.1007/s11481-007-9075-1] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2007] [Accepted: 04/20/2007] [Indexed: 01/11/2023]
|
34
|
Rezaee SAR, Cunningham C, Davison AJ, Blackbourn DJ. Kaposi's sarcoma-associated herpesvirus immune modulation: an overview. J Gen Virol 2006; 87:1781-1804. [PMID: 16760382 DOI: 10.1099/vir.0.81919-0] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Kaposi's sarcoma-associated herpesvirus (KSHV) is the most recently discovered human herpesvirus. It is the aetiological agent of Kaposi's sarcoma (KS), a tumour frequently affecting AIDS patients not receiving treatment. KSHV is also a likely cause of two lymphoproliferative diseases: multicentric Castleman's disease and primary effusion lymphoma. The study of KSHV offers exciting challenges for understanding the mechanisms of virus pathogenesis, including those involved in establishing infection and dissemination in the host. To facilitate these processes, approximately one-quarter of KSHV genes encode cellular homologues or unique proteins that have immunomodulatory roles in cytokine production, apoptosis, cell signalling and the immunological synapse. The activities of these molecules are considered in the present review and the positions of their genes are mapped from a complete KSHV genome sequence derived from a KS biopsy. The understanding gained enables the significance of different components of the immune response in protection against KSHV infection to be evaluated. It also helps to unravel the complexities of cellular and immunological pathways and offers the potential for exploiting viral immunomodulators and derivatives in disease therapy.
Collapse
Affiliation(s)
- S A Rahim Rezaee
- Cancer Research UK Institute for Cancer Studies, University of Birmingham, Vincent Drive, Birmingham B15 2TT, UK
| | | | | | - David J Blackbourn
- Cancer Research UK Institute for Cancer Studies, University of Birmingham, Vincent Drive, Birmingham B15 2TT, UK
| |
Collapse
|
35
|
Gorczynski RM. Thymocyte/Splenocyte-Derived CD4+CD25+Treg Stimulated by Anti-CD200R2 Derived Dendritic Cells Suppress Mixed Leukocyte Cultures and Skin Graft Rejection. Transplantation 2006; 81:1027-34. [PMID: 16612280 DOI: 10.1097/01.tp.0000214984.65520.50] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND CD200 delivers immunoregulatory signals following engagement of its receptor, CD200R. A family of CD200Rs (CD200R1-4) has been described. Spleen expresses cell surface CD200R1, while bone marrow shows predominantly expression of cell surface CD200R2/R3. We showed that dendritic cell precursors (DCp) cultured with anti-CD200R2/3 develop the capacity to induce CD4(+)CD25(+) regulatory T cells (Treg) from peripheral lymphocytes. We now characterize DCs involved in induction of antigen-specific Treg from thymocytes or peripheral T cells, and the properties of Treg cells maintained in long-term culture. METHODS Bone marrow DCp (C3H or BL/6 origin) were cultured for 8 days with GMCSF, IL-4 and anti-CD200R2, or with CD200Fc and a previously described peptide inhibitor of CD200R1 to allow preferential engagement of non-CD200R1 receptors by CD200. Mixed leukocyte cultures (MLCs) were initiated with allogeneic responder lymphocytes/thymocytes (BL/6 or C3H) and mitomycin-c treated DCs to induce Treg. Treg cells were maintained by reculture with DCs derived in the same manner and IL-2, cloned at limiting dilution, and tested for their ability to suppress MLCs and skin graft rejection in vivo. RESULTS Foxp3(+) CD4(+)CD25(+) Treg were derived from 60-hr thymocyte and splenocyte T cell cultures using both DC populations. Cloned C3H Treg (Foxp3(+)) suppressed both C3H anti-BL/6 reactivity in a fresh MLC and rejection of BL/6 skin allografts in C3H recipients; the converse was true for BL/6 Treg. CONCLUSIONS We conclude that CD200 triggering of bone-marrow DCs in the absence of CD200R1 engagement induces CD4(+)CD25(+) Treg, and these cloned antigen-specific Treg may have clinical utility.
Collapse
Affiliation(s)
- Reginald M Gorczynski
- Transplant Research Division, Toronto Hospital, University Health Network, Ontario, Canada.
| |
Collapse
|
36
|
Lee L, Liu J, Manuel J, Gorczynski RM. A role for the immunomodulatory molecules CD200 and CD200R in regulating bone formation. Immunol Lett 2006; 105:150-8. [PMID: 16530849 DOI: 10.1016/j.imlet.2006.02.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2005] [Revised: 12/12/2005] [Accepted: 02/06/2006] [Indexed: 01/07/2023]
Abstract
Altered osteoprotogerin (OPG) and OPG ligand (RANKL) ratios are known to regulate bone metabolism. We investigated whether CD200:CD200R interaction would alter OPG:RANKL ratios, and thus modulate bone differentiation in cultures derived from neonatal calvariae, a source of osteoblast precursors (OBp), or bone marrow-derived myeloid cells as a source of osteoclast precursors (OCp). We characterized cells in cultures using real-time PCR to measure expression of a number of mRNAs characteristic of cells differentiating towards the osteoblast or osteoclast lineage, and enumerated bone nodule formation and osteoclasts directly. CD200Fc or anti-CD200 mAbs were included as modulating agents. In addition, calvariae from transgenic mice overexpressing CD200 under control of a doxycycline-inducible promoter were used as a source of OBp endogenously overexpressing CD200. Our data show that increased endogenous expression of CD200 on OBp, or addition of CD200Fc into cultures, led to increased OPG:RANKL ratios and increased bone nodule growth, while anti-CD200 abolished this effect.
Collapse
Affiliation(s)
- L Lee
- The Toronto Hospital, University Health Network, Toronto, Canada
| | | | | | | |
Collapse
|
37
|
Abstract
The membrane glycoprotein CD200, which has a widespread but defined distribution and a structurally similar receptor (CD200R) that transmits an inhibitory signal to cells of the hematopoetic lineage, especially myeloid cells, has been characterized. CD200R expression is restricted predominantly to cells of the myeloid lineage indicating that this ligand/receptor pair has a specific role in controlling myeloid cell function. In addition to CD200R, several related genes have been identified. Whether these gene products also regulate immune function is controversial. CD200R is also expressed by certain subsets of T cells and CD200 may be expressed by antigen-presenting cells, adding additional layers of complexity to the CD200/CD200R axis. Because monocytic myeloid cells provide a link between the innate and adaptive immune response, mechanisms to control their function through receptors such as CD200R will have therapeutic potential. Regulation of immune responses is accomplished by the concerted, but opposing, activity of kinases and phosphatases, fine control often being achieved through paired receptors. In this review, we will consider whether CD200R signaling functions within a framework of paired activating and inhibitory receptors and whether the inhibitory signal delivered has functional consequences beyond inhibition of myeloid cell proinflammatory activation.
Collapse
Affiliation(s)
- Konstantinos Minas
- Department of Ophthalmology, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen, UK AB25 2ZD
| | - Janet Liversidge
- Department of Ophthalmology, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen, UK AB25 2ZD
| |
Collapse
|
38
|
Yu K, Chen Z, Wang S, Gorczynski R. Decreased Alloreactivity Using Donor Cells from Mice Expressing a CD200 Transgene Under Control of a Tetracycline-Inducible Promoter. Transplantation 2005; 80:394-401. [PMID: 16082336 DOI: 10.1097/01.tp.0000168152.72560.82] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND CD200 delivers an immunsuppressive signal that augments allograft survival following interaction with its receptor, CD200R1. We hypothesized that mice overexpressing CD200 as a trangene would also show a diminished alloresponsiveness and decreased allograft rejection. METHODS A transgenic mouse on a C57BL/6 background, expressing a murine CD200 cDNA genetically linked to a green fluorescent protein tag (GFP) under control of a tetracycline response element (TRE), was mated with a commercial transgenic mouse carrying the reverse tetracycline regulated transactivator gene under control of a human CMV promoter. F1 mice were examined for induction of alloimmunity in vivo/in vitro, and for their ability to reject skin allografts in vivo. RESULTS The F1 hybrid expressed CD200 after exposure to doxycyline (DOX), as assessed both by enhanced GFP expression in multiple organs and CD200-GFP expression. Splenocytes from F1 mice stimulated with LPS or allogeneic cells in vitro in the presence/absence of DOX showed reduced production of TNFalpha, and of allospecific CTL. Splenocytes from F1 mice used as stimulator cells in allogeneic MLCs in the presence of DOX were inefficient at induction of cytokines or CTL in vitro from normal allogeneic responder cells. Skin grafts from transgenic mice were inefficient at induction of CTL in vivo. Transgenic mice receiving DOX showed prolonged acceptance of skin allografts, which was abolished by infusion of anti-CD200 mAb. CONCLUSIONS Our data confirmed that overexpression of CD200 in transgenic mice, or in skin grafts from these mice, decreases alloimmunity. This has potential clinical utility in transplantation and other diseases.
Collapse
Affiliation(s)
- Kai Yu
- The Toronto Hospital, University Health Network, Departments of Surgery and Immunology, University of Toronto, Toronto, Canada
| | | | | | | |
Collapse
|
39
|
Tomasello E, Vivier E. KARAP/DAP12/TYROBP: three names and a multiplicity of biological functions. Eur J Immunol 2005; 35:1670-7. [PMID: 15884055 DOI: 10.1002/eji.200425932] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The signaling adaptor protein KARAP/DAP12/TYROBP (killer cell activating receptor-associated protein / DNAX activating protein of 12 kDa / tyrosine kinase binding protein) belongs to the family of transmembrane polypeptides bearing an intracytoplasmic immunoreceptor tyrosine-based activation motif (ITAM). This adaptor, initially characterized in NK cells, is associated with multiple cell-surface activating receptors expressed in both lymphoid and myeloid lineages. We review here the main features of KARAP/DAP12, describing findings from its identification to recently published data, showing its involvement in a broad array of biological functions. KARAP/DAP12 is a wiring component for NK cell anti-viral function (e.g. mouse cytomegalovirus via its association with mouse Ly49H) and NK cell anti-tumoral function (e.g. via its association with mouse NKG2D or human NKp44). KARAP/DAP12 is also involved in inflammatory reactions via its coupling to myeloid receptors, such as the triggering receptors expressed by myeloid cells (TREM) displayed by neutrophils, monocytes/macrophages and dendritic cells. Finally, bone remodeling and brain function are also dependent upon the integrity of KARAP/DAP12 signals, as shown by the analysis of KARAP/DAP12-deficient mice and KARAP/DAP12-deficient Nasu-Hakola patients.
Collapse
Affiliation(s)
- Elena Tomasello
- Laboratory of NK cells and Innate Immunity, Centre d'Immunologie de Marseille-Luminy, INSERM - CNRS - Université de la Méditerranée, Marseille, France.
| | | |
Collapse
|
40
|
Gorczynski RM. Regulation of transplantation tolerance by antigen-presenting cells. Transplant Rev (Orlando) 2005. [DOI: 10.1016/j.trre.2005.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
41
|
Chen DX, Gorczynski RM. Discrete monoclonal antibodies define functionally important epitopes in the CD200 molecule responsible for immunosuppression function. Transplantation 2005; 79:282-8. [PMID: 15699757 DOI: 10.1097/01.tp.0000149506.61000.86] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
BACKGROUND Both murine and human CD200 fusion proteins (CD200Fc) act as immunosuppressants after engagement of cell-bound receptors (CD200R). Anti-CD200 monoclonal antibodies (mAbs) augment activity in mixed leukocyte cultures (MLCs) (increased cytotoxic T lymphocyte/cytokine production) after neutralization of endogenous CD200 activity. Previous studies documented critical regions in the N-terminal domains of both CD200 and CD200R1 for ligand:receptor binding and defined a number of synthetic CD200 and CD200R peptides that antagonize that interaction. METHODS We used a panel of mAbs to mouse and human CD200Fc to compare the rank activities of antibodies for binding (flow cytometric analysis [FACS] or enzyme-linked immunoadsorbent assay [ELISA]) to CD200 with their abilities to augment immune reactivity in MLCs. RESULTS Only mAbs defining epitopes in the N-terminal domain could augment MLC reactivity (or block immunosuppression by soluble CD200Fc), whereas mAbs targeting C-domain epitopes, although reactive in ELISA or FACS (targeting cell surface CD200), were inactive in MLCs. CONCLUSION In addition to defining the importance of N-terminal epitopes for CD200 function, rank comparison of mAbs for FACS staining of CD200 expressed on various cell types indicates heterogeneity in expressed CD200.
Collapse
Affiliation(s)
- Dang-Xiao Chen
- The Toronto Hospital, University Health Network, Toronto, Canada
| | | |
Collapse
|
42
|
Clark DA, Chaouat G. Loss of Surface CD200 on Stored Allogeneic Leukocytes may Impair Anti-abortive EffectIn Vivo. Am J Reprod Immunol 2005; 53:13-20. [PMID: 15667521 DOI: 10.1111/j.1600-0897.2005.00240.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
PROBLEM Prevention of spontaneous abortion by allogeneic mononuclear leukocyte immunotherapy has proven ineffective in the CBA x DBA/2 murine abortion model if the leukocytes are stored overnight before inoculation. The mechanism and generality of the phenomenon has not been elucidated. METHODS As prevention of recurrent abortion in the CBA x DBA/2 model requires allogeneic BALB/c lymphoid cells bearing paternal antigens and the tolerance-signaling molecule CD200 (OX-2), we evaluated effects of cell storage on cell surface CD200 expression using flow cytometry of fresh or stored cells stained with monoclonal anti-CD200 antibody. Release of putative CD200 molecules into culture supernatant during storage was tested by the ability of supernatants to block binding of anti-CD200 to freshly isolated cells. Similar studies were done using human peripheral blood mononuclear leukocytes. Possible binding of soluble CD200 to immunoglobulin G (IgG) molecules in plasma as a basis for the anti-abortive effect of intravenous immunoglobulin G (IVIG) was tested using the standard peripheral blood lymphocyte (PBL) natural killer (NK) cell lysis of (51)Cr-labeled K562 cells and monoclonal anti-human CD200 antibodies. RESULTS Loss of anti-abortive effect of BALB/c cells with overnight storage at 4 degrees C and blocking of protective effect of freshly isolated cells with anti-CD200 antibody was confirmed. Supernatants of stored cells acquired a low level of protective activity against abortion in the CBA x DBA/2 model. Cell surface CD200 was lost with overnight storage at 4 or 22 degrees C, and supernatants acquired the ability to block binding of anti-CD200 antibody to fresh cells. Similar results were obtained using human PBL. However, if cells were stored overnight in IgG containing plasma, binding was not blocked. Suppression of NK cell lysis by PBL was abrogated if anti-CD200 antibody was added to the assay. CONCLUSIONS Loss of the tolerance signal CD200 from allogeneic cells occurs with storage overnight, and their ability to protect against abortion is lost. CD200 appears to be shed into the supernatant, and may associate with IgG molecules rendering IVIG suppressive.
Collapse
MESH Headings
- Abortion, Spontaneous/immunology
- Abortion, Spontaneous/prevention & control
- Animals
- Antigens, CD
- Antigens, Surface/immunology
- Cold Temperature
- Female
- Humans
- Immunoglobulin G/immunology
- Immunoglobulin G/pharmacology
- Immunoglobulins, Intravenous/immunology
- Killer Cells, Natural/drug effects
- Killer Cells, Natural/immunology
- Leukocytes/immunology
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Inbred CBA
- Mice, Inbred DBA
Collapse
Affiliation(s)
- David A Clark
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada.
| | | |
Collapse
|