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Mei XF, Shi W, Zhang YY, Zhu B, Wang YR, Hou LJ, Zhao WP, Li J, Wang DY, Luo HL, Huang WY. DNA methylation and hydroxymethylation profiles reveal possible role of highly methylated TLR signaling on Fasciola gigantica excretory/secretory products (FgESPs) modulation of buffalo dendritic cells. Parasit Vectors 2019; 12:358. [PMID: 31337442 PMCID: PMC6647289 DOI: 10.1186/s13071-019-3615-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 07/13/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Excretory/secretory products (ESPs) released by parasites influence the development and functions of host dendritic cells (DCs). However, little is known about changes of DNA (hydroxy)methylation on DC development during Fasciola gigantica infection. The present study aimed to investigate whether F. gigantica ESPs (FgESPs) affects the development and functions of buffalo DCs through altering the DNA (hydroxy)methylation of DCs. METHODS Buffalo DCs were prepared from peripheral blood mononuclear cells (PBMCs) and characterized using scanning and transmission electron microscopy (SEM/TEM) and quantitative reverse transcriptional PCR (qRT-RCR). DCs were treated with 200 μg/ml of FgESPs in vitro, following DNA extraction. The DNA methylome and hydroxymethylome were profiled based on (hydroxy)methylated DNA immunoprecipitation sequencing [(h)MeDIP-Seq] and bioinformatics analyses. qRT-RCR was also performed to assess the gene transcription levels of interest. RESULTS FgESPs markedly suppressed DC maturation evidenced by morphological changes and downregulated gene expression of CD1a and MHC II. Totals of 5432 and 360 genes with significant changes in the 5-methylcytosine (5-mC) and the 5-hydroxymethylcytosine (5-hmC) levels, respectively, were identified in buffalo DCs in response to FgESPs challenge. Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis revealed that these differentially expressed genes were highly enriched in pathways associated with immune response. Some cancer-related pathways were also indicated. There were 111 genes demonstrating changes in both 5-mC and 5-hmC levels, 12 of which were interconnected and enriched in 12 pathways. The transcription of hypermethylated genes TLR2, TLR4 and IL-12B were downregulated or in a decreasing trend, while the mRNA level of high-hydroxymethylated TNF gene was upregulated in buffalo DCs post-exposure to FgESPs in vitro. CONCLUSIONS To our knowledge, the present study provides for the first time a unique genome-wide profile of DNA (hydroxy)methylation for DCs that interact with FgESPs, and suggests a possible mechanism of FgESPs in suppressing DC maturation and functions that are involved in TLR signaling.
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Affiliation(s)
- Xue-Fang Mei
- School of Animal Science and Technology, Guangxi University, Nanning, People's Republic of China
| | - Wei Shi
- School of Preclinical Medicine, Guangxi Medical University, Nanning, People's Republic of China
| | - Yao-Yao Zhang
- School of Animal Science and Technology, Guangxi University, Nanning, People's Republic of China
| | - Bin Zhu
- School of Animal Science and Technology, Guangxi University, Nanning, People's Republic of China
| | - Yu-Rui Wang
- School of Animal Science and Technology, Guangxi University, Nanning, People's Republic of China
| | - Lin-Jing Hou
- School of Animal Science and Technology, Guangxi University, Nanning, People's Republic of China
| | - Wen-Ping Zhao
- School of Animal Science and Technology, Guangxi University, Nanning, People's Republic of China
| | - Jian Li
- State Key Laboratory of Genetic Engineering, Ministry of Education Key Laboratory of Contemporary Anthropology, Collaborative Innovation Center for Genetics and Development, School of Life Sciences, Fudan University, Shanghai, People's Republic of China
| | - Dong-Ying Wang
- School of Animal Science and Technology, Guangxi University, Nanning, People's Republic of China.
| | - Hong-Lin Luo
- Guangxi Key Laboratory for Aquatic Genetic Breeding and Healthy Aquaculture, Guangxi Institute of Fishery Sciences, Nanning, People's Republic of China.
| | - Wei-Yi Huang
- School of Animal Science and Technology, Guangxi University, Nanning, People's Republic of China.
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Kratochvílová L, Sláma P. Overview of Bovine Dendritic Cells. ACTA UNIVERSITATIS AGRICULTURAE ET SILVICULTURAE MENDELIANAE BRUNENSIS 2018. [DOI: 10.11118/actaun201866030815] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Baquero MM, Plattner BL. Bovine WC1 + and WC1 neg γδ T Lymphocytes Influence Monocyte Differentiation and Monocyte-Derived Dendritic Cell Maturation during In Vitro Mycobacterium avium Subspecies paratuberculosis Infection. Front Immunol 2017; 8:534. [PMID: 28588573 PMCID: PMC5439176 DOI: 10.3389/fimmu.2017.00534] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Accepted: 04/21/2017] [Indexed: 12/23/2022] Open
Abstract
During early Mycobacterium avium subspecies paratuberculosis (Map) infection, complex interactions occur between the bacteria, cells from the mononuclear phagocyte system (MPS) including both resident (macrophages and dendritic cells) and recruited (monocytes) cells, and other mucosal sentinel cells such as γδ T lymphocytes. Though the details of early host–pathogen interactions in cattle remain largely underexplored, our hypothesis is that these significantly influence development of host immunity and ultimate success or failure of the host to respond to Map infection. The aims of the present study were to first characterize monocyte-derived MPS cells from young calves with respect to their immunophenotype and function. Then, we set out to investigate the effects of WC1+ and WC1neg γδ T lymphocytes on (1) the differentiation of autologous monocytes and (2) the maturation of autologous monocyte-derived dendritic cells (MDDCs). To achieve this, peripheral blood WC1+ or WC1neg γδ T lymphocytes were cocultured with either autologous freshly isolated peripheral blood-derived monocytes or autologous immature MDDCs (iMDDCs). We began by measuring several markers of interest on MPS cells. Useful markers to distinguish monocyte-derived macrophages (MDMs) from MDDCs include CD11b, CD163, and CD172a, which are expressed significantly higher on MDMs compared with MDDCs. Function, but not phenotype, was influenced by WC1neg γδ T lymphocytes: viability of Map harvested from monocytes differentiated in the presence of WC1neg γδ T lymphocytes (dMonWC1neg) was significantly lower compared to MDMs and MDDCs. With respect to DC maturation, we first showed that mature MDDCs (mMDDCs) have significantly higher expression of CD11c, CD80, and CD86 compared with iMDDCs, and the phagocytic capacity of mMDDCs is significantly reduced compared to iMDDCs. We then showed that γδ T lymphocyte subsets induce functional (reduced phagocytosis) but not phenotypic (surface marker expression) iMDDC maturation. These data collectively show that γδ T lymphocytes influence differentiation, maturation, and ultimately the function of monocytes during Map infection, which has significant implications on survival of Map and success of host defense during early Map infection.
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Affiliation(s)
- Monica M Baquero
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Brandon L Plattner
- Department of Pathobiology, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
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Lund H, Boysen P, Åkesson CP, Lewandowska-Sabat AM, Storset AK. Transient Migration of Large Numbers of CD14(++) CD16(+) Monocytes to the Draining Lymph Node after Onset of Inflammation. Front Immunol 2016; 7:322. [PMID: 27621730 PMCID: PMC5002921 DOI: 10.3389/fimmu.2016.00322] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 08/15/2016] [Indexed: 12/12/2022] Open
Abstract
The dynamics of skin-draining cells following infection or vaccination provide important insight into the initiation of immune responses. In this study, the local recruitment and activation of immune cells in draining lymph nodes (LNs) was studied in calves in an adjuvant-induced inflammation. A transient but remarkably strong recruitment of monocytes was demonstrated after onset of inflammation, constituting up to 41% of live cells in the draining LNs after 24 h. Numerous CD14(+) cells were visualized in subcutaneous tissues and draining LNs, and the majority of these cells did not express dendritic cell-associated markers CD205 and CD11c. In the LNs, recruited cells were predominately of a CD14(++) and CD16(+) phenotype, consistent with an intermediate monocyte subset characterized to possess a high inflammatory potential. Moreover, monocytes from the draining LN showed a high expression of genes coding for pro-inflammatory cytokines, including IL-1β, IL-6, TNFa, and TGFβ. Shortly after their appearance in the LN cortical areas, the monocytes had moved into the medulla followed by an increase in peripheral blood. In conclusion, this study provides novel information on in vivo monocyte recruitment and migration after onset of inflammation.
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Affiliation(s)
- Hege Lund
- Department of Food Safety and Infection Biology, Norwegian University of Life Sciences , Oslo , Norway
| | - Preben Boysen
- Department of Food Safety and Infection Biology, Norwegian University of Life Sciences , Oslo , Norway
| | - Caroline Piercey Åkesson
- Department of Basic Sciences and Aquatic Medicine, Norwegian University of Life Sciences , Oslo , Norway
| | | | - Anne K Storset
- Department of Food Safety and Infection Biology, Norwegian University of Life Sciences , Oslo , Norway
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Sei JJ, Waters RA, Kenney M, Barlow JW, Golde WT. Effect of Foot-and-Mouth Disease Virus Infection on the Frequency, Phenotype and Function of Circulating Dendritic Cells in Cattle. PLoS One 2016; 11:e0152192. [PMID: 27008425 PMCID: PMC4805171 DOI: 10.1371/journal.pone.0152192] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 03/10/2016] [Indexed: 11/18/2022] Open
Abstract
Foot-and-mouth disease virus (FMDV) is a highly contagious virus that causes one of the most devastating diseases in cloven-hoofed animals. Disease symptoms develop within 2 to 3 days of exposure and include fever and vesicular lesions on the tongue and hooves. Dendritic cells (DC) play an essential role in protective immune responses against pathogens. Therefore, investigating their role during FMDV infection would lead to a better understanding of host-pathogen interactions. In this study, following infection of cattle with FMDV, we investigated the frequency and function of conventional (cDC) and plasmacytoid DC (pDC) in blood by using multi-color flow cytometry. We show that the frequency of cDC and pDC increased following FMDV infection and peaked 3 to 4 days post-infection. During peak viremia, the cattle became lymphopenic, the expression of MHC class II molecules on cDC and pDC was dramatically down-regulated, the processing of exogenous antigen by cDC and pDC was impaired, and there was an increase in IL-10 production by DC and monocytes. Notably, after clearance of FMDV from the blood, MHC class II expression returned to pre-infection levels. Altogether, our study demonstrates that in cattle, FMDV inhibits the function of DC, thereby retarding the initiation of adaptive immune responses, potentially enhancing virus shedding during the acute phase of infection.
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Affiliation(s)
- Janet J. Sei
- Plum Island Animal Disease Center, Agricultural Research Service, USDA, Greenport, NY, United States of America
- Department of Animal and Veterinary Sciences, University of Vermont, Burlington, VT, United States of America
| | - Ryan A. Waters
- Plum Island Animal Disease Center, Agricultural Research Service, USDA, Greenport, NY, United States of America
| | - Mary Kenney
- Plum Island Animal Disease Center, Agricultural Research Service, USDA, Greenport, NY, United States of America
| | - John W. Barlow
- Department of Animal and Veterinary Sciences, University of Vermont, Burlington, VT, United States of America
| | - William T. Golde
- Plum Island Animal Disease Center, Agricultural Research Service, USDA, Greenport, NY, United States of America
- * E-mail:
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Hajam IA, Dar PA, Appavoo E, Kishore S, Bhanuprakash V, Ganesh K. Bacterial Ghosts of Escherichia coli Drive Efficient Maturation of Bovine Monocyte-Derived Dendritic Cells. PLoS One 2015; 10:e0144397. [PMID: 26669936 PMCID: PMC4684396 DOI: 10.1371/journal.pone.0144397] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 11/17/2015] [Indexed: 01/28/2023] Open
Abstract
Bacterial ghosts (BGs) are empty cell envelopes derived from Gram-negative bacteria. They not only represent a potential platform for development of novel vaccines but also provide a tool for efficient adjuvant and antigen delivery system. In the present study, we investigated the interaction between BGs of Escherichia coli (E. coli) and bovine monocyte-derived dendritic cells (MoDCs). MoDCs are highly potent antigen-presenting cells and have the potential to act as a powerful tool for manipulating the immune system. We generated bovine MoDCs in vitro from blood monocytes using E. coli expressed bovine GM-CSF and IL-4 cytokines. These MoDCs displayed typical morphology and functions similar to DCs. We further investigated the E. coli BGs to induce maturation of bovine MoDCs in comparison to E. coli lipopolysaccharide (LPS). We observed the maturation marker molecules such as MHC-II, CD80 and CD86 were induced early and at higher levels in BG stimulated MoDCs as compared to the LPS stimulated MoDCs. BG mediated stimulation induced significantly higher levels of cytokine expression in bovine MoDCs than LPS. Both pro-inflammatory (IL-12 and TNF-α) and anti-inflammatory (IL-10) cytokines were induced in MoDCs after BGs stimulation. We further analysed the effects of BGs on the bovine MoDCs in an allogenic mixed lymphocyte reaction (MLR). We found the BG-treated bovine MoDCs had significantly (p<0.05) higher capacity to stimulate allogenic T cell proliferation in MLR as compared to the LPS. Taken together, these findings demonstrate the E. coli BGs induce a strong activation and maturation of bovine MoDCs.
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Affiliation(s)
- Irshad Ahmed Hajam
- FMD Research Center, Indian Veterinary Research Institute, Bangalore, India
| | - Pervaiz Ahmad Dar
- Division of Veterinary Microbiology and Immunology, Faculty of Veterinary Sciences and Animal Husbandry, SKUAST-Kashmir, Srinagar, India
- * E-mail: (PAD); (KG)
| | - Elamurugan Appavoo
- FMD Research Center, Indian Veterinary Research Institute, Bangalore, India
| | - Subodh Kishore
- FMD Research Center, Indian Veterinary Research Institute, Bangalore, India
| | | | - Kondabattula Ganesh
- FMD Research Center, Indian Veterinary Research Institute, Bangalore, India
- * E-mail: (PAD); (KG)
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Summerfield A, Auray G, Ricklin M. Comparative Dendritic Cell Biology of Veterinary Mammals. Annu Rev Anim Biosci 2015; 3:533-57. [DOI: 10.1146/annurev-animal-022114-111009] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Artur Summerfield
- Institute of Virology and Immunology, 3147 Mittelhäusern, Switzerland;
| | - Gael Auray
- Institute of Virology and Immunology, 3147 Mittelhäusern, Switzerland;
| | - Meret Ricklin
- Institute of Virology and Immunology, 3147 Mittelhäusern, Switzerland;
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Sei JJ, Ochoa AS, Bishop E, Barlow JW, Golde WT. Phenotypic, ultra-structural, and functional characterization of bovine peripheral blood dendritic cell subsets. PLoS One 2014; 9:e109273. [PMID: 25295753 PMCID: PMC4190170 DOI: 10.1371/journal.pone.0109273] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 09/01/2014] [Indexed: 11/18/2022] Open
Abstract
Dendritic cells (DC) are multi-functional cells that bridge the gap between innate and adaptive immune systems. In bovine, significant information is lacking on the precise identity and role of peripheral blood DC subsets. In this study, we identify and characterize bovine peripheral blood DC subsets directly ex vivo, without further in vitro manipulation. Multi-color flow cytometric analysis revealed that three DC subsets could be identified. Bovine plasmacytoid DC were phenotypically identified by a unique pattern of cell surface protein expression including CD4, exhibited an extensive endoplasmic reticulum and Golgi apparatus, efficiently internalized and degraded exogenous antigen, and were the only peripheral blood cells specialized in the production of type I IFN following activation with Toll-like receptor (TLR) agonists. Conventional DC were identified by expression of a different pattern of cell surface proteins including CD11c, MHC class II, and CD80, among others, the display of extensive dendritic protrusions on their plasma membrane, expression of very high levels of MHC class II and co-stimulatory molecules, efficient internalization and degradation of exogenous antigen, and ready production of detectable levels of TNF-alpha in response to TLR activation. Our investigations also revealed a third novel DC subset that may be a precursor of conventional DC that were MHC class II+ and CD11c−. These cells exhibited a smooth plasma membrane with a rounded nucleus, produced TNF-alpha in response to TLR-activation (albeit lower than CD11c+ DC), and were the least efficient in internalization/degradation of exogenous antigen. These studies define three bovine blood DC subsets with distinct phenotypic and functional characteristics which can be analyzed during immune responses to pathogens and vaccinations of cattle.
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Affiliation(s)
- Janet J. Sei
- Plum Island Animal Disease Center, Agricultural Research Service, USDA, Greenport, New York, United States of America
- Department of Animal Sciences, University of Vermont, Burlington, Vermont, United States of America
| | - Amanda S. Ochoa
- Department of Animal Sciences, University of Vermont, Burlington, Vermont, United States of America
| | - Elizabeth Bishop
- Plum Island Animal Disease Center, Agricultural Research Service, USDA, Greenport, New York, United States of America
| | - John W. Barlow
- Department of Animal Sciences, University of Vermont, Burlington, Vermont, United States of America
| | - William T. Golde
- Plum Island Animal Disease Center, Agricultural Research Service, USDA, Greenport, New York, United States of America
- * E-mail:
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González-Cano P, Arsic N, Popowych YI, Griebel PJ. Two functionally distinct myeloid dendritic cell subpopulations are present in bovine blood. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2014; 44:378-388. [PMID: 24502939 DOI: 10.1016/j.dci.2014.01.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 01/15/2014] [Accepted: 01/16/2014] [Indexed: 06/03/2023]
Abstract
Immature myeloid (m)DCs circulating in the blood of cattle have been defined as lineage negative (Lin(-))MHCII(+)CD11c(+)CD205(+) cells. Lin(-)MHCII(+)CD11c(+)CD205(+) mDCs (0.2% blood mononuclear cells) isolated from bovine blood were heterogeneous in cell size and CD205 expression. Using highspeed cell sorting, Lin(-)MHCII(+)CD11c(+)CD205(+) DCs were sorted into CD205(Hi) and CD205(Lo) subpopulations which were phenotypically distinct and differed significantly (P<0.01) in TLR gene expression. CD205(Hi) and CD205(Lo) mDCs were more efficient in macropinocytosis than monocytes and expressed no or little detectable non-specific esterase activity. CD205(Lo) mDCs efficiently activated purified allogeneic T cells and the addition of TLR agonists did not significantly alter this antigen presentation capacity. T cell activation by CD205(Lo) mDCs was associated with differential up-regulation of CD40, CD80, CD86 and TGFβ1 gene expression when compared to CD205(Hi) mDCs. In conclusion, two phenotypically and functionally distinct CD11c(+)CD205(+) mDCs were isolated from blood that had an equal capacity to acquire antigen but markedly different capacities to activate T cells.
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Affiliation(s)
- Patricia González-Cano
- Vaccine and Infectious Disease Organization-International Vaccine Center, 120 Veterinary Road, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Natasa Arsic
- Vaccine and Infectious Disease Organization-International Vaccine Center, 120 Veterinary Road, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Yurij I Popowych
- Vaccine and Infectious Disease Organization-International Vaccine Center, 120 Veterinary Road, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada
| | - Philip J Griebel
- Vaccine and Infectious Disease Organization-International Vaccine Center, 120 Veterinary Road, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada; School of Public Health, University of Saskatchewan, Saskatoon, SK S7N 5E3, Canada.
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Mackenzie-Dyck S, Attah-Poku S, Juillard V, Babiuk LA, van Drunen Littel-van den Hurk S. The synthetic peptides bovine enteric β-defensin (EBD), bovine neutrophil β-defensin (BNBD) 9 and BNBD 3 are chemotactic for immature bovine dendritic cells. Vet Immunol Immunopathol 2011; 143:87-107. [PMID: 21764462 DOI: 10.1016/j.vetimm.2011.06.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2010] [Revised: 05/11/2011] [Accepted: 06/17/2011] [Indexed: 11/17/2022]
Abstract
Human and murine immature DCs (iDCs) are highly efficient in antigen capture and processing, while as mature cells they present antigen and are potent initiators of cell-mediated immune responses. Consequently, iDCs are logical targets for vaccine antigens. Originally discovered for their antimicrobial activity, and thought of as strictly part of the innate immune system, studies with defensins such as human β (beta)-defensin 2 (hBD2) and murine β-defensin 2 (mBD2) have shown that they can function as chemo-attractant for iDCs and, in vaccination strategies, can enhance antigen-specific adaptive immune responses. Most studies to date have been conducted in mice. In contrast, little is known about defensins in cattle. To expand our understanding of the role of defensins in modulating immune responses in cattle, DCs were generated from bovine monocytes and the immature state of these bovine DCs was characterized phenotypically and through functional assays. By day 3 (DC3), bovine monocyte-derived DCs stained positively for DC-specific receptors CD1, CD80/86, CD205, DC-Lamp and MMR. When compared to conventional 6-day DC cultures or DCs cultured for 10 days with and without maturation factors, these DC3 were functionally at their most immature stage. Fourteen of the 16 known bovine β-defensins were synthesized and the synthetic peptides were screened for their ability to attract bovine iDCs. Bovine DC3 were consistently attracted to BNBD3, an analog of BNBD3 (aBNBD3), BNBD9 and bovine EBD in vitro and to aBNBD3 in vivo. These results are the first to describe chemotactic ability of synthetic bovine β-defensins for immature bovine monocyte-derived DCs.
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Affiliation(s)
- Sarah Mackenzie-Dyck
- Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, Canada
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Zebrafish kidney phagocytes utilize macropinocytosis and Ca+-dependent endocytic mechanisms. PLoS One 2009; 4:e4314. [PMID: 19183805 PMCID: PMC2629567 DOI: 10.1371/journal.pone.0004314] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2008] [Accepted: 12/17/2008] [Indexed: 01/20/2023] Open
Abstract
Background The innate immune response constitutes the first line of defense against invading pathogens and consists of a variety of immune defense mechanisms including active endocytosis by macrophages and granulocytes. Endocytosis can be used as a reliable measure of selective and non-selective mechanisms of antigen uptake in the early phase of an immune response. Numerous assays have been developed to measure this response in a variety of mammalian and fish species. The small size of the zebrafish has prevented the large-scale collection of monocytes/macrophages and granulocytes for these endocytic assays. Methodology/Principal Findings Pooled zebrafish kidney hematopoietic tissues were used as a source of phagocytic cells for flow-cytometry based endocytic assays. FITC-Dextran, Lucifer Yellow and FITC-Edwardsiella ictaluri were used to evaluate selective and non-selective mechanisms of uptake in zebrafish phagocytes. Conclusions/Significance Zebrafish kidney phagocytes characterized as monocytes/macrophages, neutrophils and lymphocytes utilize macropinocytosis and Ca2+-dependant endocytosis mechanisms of antigen uptake. These cells do not appear to utilize a mannose receptor. Heat-killed Edwardsiella ictaluri induces cytoskeletal interactions for internalization in zebrafish kidney monocytes/macrophages and granulocytes. The proposed method is easy to implement and should prove especially useful in immunological, toxicological and epidemiological research.
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Bovine viral diarrhea virus infection affects the expression of proteins related to professional antigen presentation in bovine monocytes. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2008; 1794:14-22. [PMID: 18930168 DOI: 10.1016/j.bbapap.2008.09.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2008] [Revised: 09/08/2008] [Accepted: 09/09/2008] [Indexed: 11/22/2022]
Abstract
The complete annotation of the cattle genome allows reliable protein identification by tandem mass spectrometry (MS(2)) and greatly facilitates proteomics. Previously, we reported that differential detergent fractionation (DDF) analysis of bovine monocytes reveals proteins related to antigen pattern recognition, uptake and presentation to immunocompetent lymphocytes. Here we have identified 47 bovine proteins, involved in immune function of professional antigen-presenting cells (APC) that have been significantly altered after cytopathic (cp) Bovine Viral Diarrhea Virus (BVDV) infection. In particular, proteins related to immune responses such as cell adhesion, apoptosis, antigen uptake, processing and presentation, acute phase response proteins, MHC class I- and II-related proteins and other molecules involved in immune function of professional antigen presentation have been significantly altered after BVDV infection. Our data suggest that cp BVDV, while promoting monocyte activation and differentiation, is inhibiting their antigen presentation to immunocompetent T cells, thus resulting in the uncontrolled inflammation mediated by activated macrophages, enhanced viral spread, and impaired anti-viral defense mechanisms in the host.
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Pinchuk GV, Lee SR, Nanduri B, Honsinger KL, Stokes JV, Pinchuk LM. Bovine viral diarrhea viruses differentially alter the expression of the protein kinases and related proteins affecting the development of infection and anti-viral mechanisms in bovine monocytes. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2008; 1784:1234-47. [DOI: 10.1016/j.bbapap.2008.05.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2007] [Revised: 05/05/2008] [Accepted: 05/06/2008] [Indexed: 10/22/2022]
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Lee SR, Pharr GT, Boyd BL, Pinchuk LM. Bovine viral diarrhea viruses modulate toll-like receptors, cytokines and co-stimulatory molecules genes expression in bovine peripheral blood monocytes. Comp Immunol Microbiol Infect Dis 2008; 31:403-18. [PMID: 17706777 DOI: 10.1016/j.cimid.2007.06.006] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/25/2007] [Indexed: 11/28/2022]
Abstract
We have used noncytopathic (ncp) and cytopathic (cp) Bovine Viral Diarrhea Viruses (BVDV) to determine the expression levels of TLR genes, type I IFN, pro-inflammatory and Th1/Th2 cytokine gene expression in bovine monocytes. In general, both BVDV strains had similar effects. However, we found some significant differences that could be due to biological differences between cp and ncp BVDV strains. TLR3 was significantly up-regulated in 1h ncp, but not in cp BVDV- infected monocytes, whereas TLR7 expression dominated in 24h infection with both BVDV strains. Type I IFN and IL-12 gene expression was also significantly up-regulated in 1h ncp, but not cp BVDV infection that correlated with the enhanced TLR3 gene expression. Both BVDV biotypes suppressed pro-inflammatory cytokines TNF-alpha, IL-1beta, and IL-6, co-stimulatory molecules CD80 and CD86, but did not change Th1 type cytokine IL-12 and INF-gamma, gene expression after 24h infection. We hypothesize that BVDV may escape immune responses by altering the expression of TLR 3 and 7 and their signaling pathways.
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Affiliation(s)
- S-R Lee
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, P.O. Box 6100, Mississippi State, MS 39762-6100, USA
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Buza J, Benjamin P, Zhu J, Wilson HL, Lipford G, Krieg AM, Babiuk LA, Mutwiri GK. CD14+ cells are required for IL-12 response in bovine blood mononuclear cells activated with Toll-like receptor (TLR) 7 and TLR8 ligands. Vet Immunol Immunopathol 2008; 126:273-82. [PMID: 18789542 DOI: 10.1016/j.vetimm.2008.08.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Revised: 07/15/2008] [Accepted: 08/13/2008] [Indexed: 12/21/2022]
Abstract
Single-stranded viral RNA (ssRNA) was recently identified as the natural ligand for TLR7 and TLR8. ssRNA sequences from viruses, as well as their synthetic analogues stimulate innate immune responses in immune cells from humans and mice, but their immunostimulatory activity has not been investigated in ruminants. In the present investigations, we tested whether synthetic RNA oligoribonucleotides (ORN) can activate immune cells from cattle. In vitro incubation of bovine peripheral blood mononuclear cells (PBMCs) with ORN-induced production of IL-12, IFN-gamma and TNF-alpha. No significant induction of IFN-alpha was observed. Depletion of CD14+ cells from PBMC abrogated the IL-12 response and consequently the IFN-gamma response, suggesting that CD14+ cells are required for PBMC immune activation with ORN. Consistent with these findings, the putative receptors for ORN (TLR7 and TLR8) were expressed at higher levels in the CD14+ fraction than the CD14- PBMC fraction. Pre-treatment of PBMC with bafilomycin (an inhibitor of phagosomal acidification) prior to stimulation with ORN abolished the cytokine responses, confirming that the receptor(s) which mediate the ORN-induced responses are intracellular. These results demonstrate for the first time that the TLR7/8 agonist ORN's have strong immune stimulatory effects in cattle, and suggest that further investigation on the potential of TLR7/8 ligands to activate innate and adaptive immune responses in domestic animals are warranted.
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Affiliation(s)
- Joram Buza
- Vaccine & Infectious Disease Organization/International Vaccine Center, University of Saskatchewan, Saskatoon, Saskatchewan, Canada SK S7N 5E3
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16
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Lei L, Hostetter JM. Limited phenotypic and functional maturation of bovine monocyte-derived dendritic cells following Mycobacterium avium subspecies paratuberculosis infection in vitro. Vet Immunol Immunopathol 2007; 120:177-86. [PMID: 17686529 DOI: 10.1016/j.vetimm.2007.06.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2007] [Revised: 06/05/2007] [Accepted: 06/25/2007] [Indexed: 11/19/2022]
Abstract
After encountering antigen, dendritic cells (DC) must differentiate into a fully mature phenotype to induce a protective, lasting T cell immunity. Paratuberculosis is a disease caused by the intracellular pathogen Mycobacterium avium subspecies paratuberculosis (M. paratuberculosis) and is characterized by a transient cell mediated immune response, that when dissipates correlates to the onset of clinical disease. In order to study the mechanism of early cellular immunity associated with M. paratuberculosis infection, we tested the hypothesis that M. paratuberculosis infected bovine DC have impaired activation and maturation thus are defective in the initiation of a sustainable and protective Th1 immune response locally. Our results demonstrate that M. paratuberculosis infected DC showed decreased endocytosis of ovalbumin, indicating some functional maturation. Co-stimulatory molecules CD40 and CD80 mRNA expression from M. paratuberculosis infected DC was increased over untreated immature DC. M. paratuberculosis infection induced chemokine receptor CCR7 increase in DC, yet CCR5 remained high. MHC II surface expression remained low on M. paratuberculosis infected DC. M. paratuberculosis infection inhibited pro-inflammatory cytokine IL-12 production and promoted IL-10 secretion by bovine DC. Together, our findings showed evidence of phenotypic and functional maturation of DC. However, we did not see the expected antigen presentation via MHC II and cytokine responses as a fully mature DC. This may suggest semi-mature DC phenotype induced by M. paratuberculosis infection.
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Affiliation(s)
- Liying Lei
- Immunobiology Graduate Program, Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, IA 50010-1250, United States
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17
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Yaghoubi SMJ, Ghorbani GR, Rahmani HR, Nikkhah A. Growth, weaning performance and blood indicators of humoral immunity in Holstein calves fed supplemental flavonoids. J Anim Physiol Anim Nutr (Berl) 2007; 92:456-62. [PMID: 18662355 DOI: 10.1111/j.1439-0396.2007.00734.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The primary objective was to test the hypothesis that flavonoids mediate immune response and affect calf performance. Twenty Holstein calves [7 +/- 2 days age; 41.4 +/- 0.7 kg body weight (BW)] were randomly assigned to four treatments of (i) no; (ii) low (7.3 x 10(-5) g/kg BW); (iii) medium (7.3 x 10(-4) g/kg BW); and (iv) high (3.6 x 10(-3) g/kg BW) doses of flavonoids intake in a completely randomized design. Calves received the treatments as a tablet until weaning or a daily intake of 680 g starter. After weaning, calves received no supplemental flavonoids and monitored until 120 days of age. The flavonoids were extracted from propolis. Treatments did not affect body length, wither height and the severity of scours. At week 5 of age, BW was higher when calves fed the high compared to the low dose of flavonoids. At week 6, calves fed the high dose of flavonoids had higher BW than those fed no or low doses of flavonoids. The serum immunoglobulin G (IgG) concentrations remained lower at the first 3 weeks of the experiment when calves received the low but not the high doses of flavonoids. At week 4, both medium and low doses of flavonoids moderated serum IgG. At week 8, the medium and high but not the low doses of flavonoids lowered serum IgG. At week 6, calves fed high and medium flavonoids doses had lower blood immunoglobulin M (IgM) than control calves. Results suggest that flavonoids affect the humoral immune response and can improve growth in young calves. This response depended on calf age. Future studies are needed to further evaluate the premise that dietary forages or the main source of flavonoids are helpful for a less stressful weaning in the modern calf raising.
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Affiliation(s)
- S M J Yaghoubi
- Department of Animal Science, Isfahan University of Technology, Isfahan, Iran
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18
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Pinchuk LM, Lee SR, Filipov NM. In vitro atrazine exposure affects the phenotypic and functional maturation of dendritic cells. Toxicol Appl Pharmacol 2007; 223:206-17. [PMID: 17662328 PMCID: PMC2042142 DOI: 10.1016/j.taap.2007.06.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2007] [Revised: 06/10/2007] [Accepted: 06/12/2007] [Indexed: 11/22/2022]
Abstract
Recent data suggest that some of the immunotoxic effects of the herbicide atrazine, a very widely used pesticide, may be due to perturbations in dendritic cell (DC) function. As consequences of atrazine exposure on the phenotypic and functional maturation of DC have not been studied, our objective was, using the murine DC line, JAWSII, to determine whether atrazine will interfere with DC maturation. First, we characterized the maturation of JAWSII cells in vitro by inducing them to mature in the presence of growth factors and selected maturational stimuli in vitro. Next, we exposed the DC cell line to a concentration range of atrazine and examined its effects on phenotypic and functional maturation of DC. Atrazine exposure interfered with the phenotypic and functional maturation of DC at non-cytotoxic concentrations. Among the phenotypic changes caused by atrazine exposure was a dose-dependent removal of surface MHC-I with a significant decrease being observed at 1 microM concentration. In addition, atrazine exposure decreased the expression of the costimulatory molecule CD86 and it downregulated the expression of the CD11b and CD11c accessory molecules and the myeloid developmental marker CD14. When, for comparative purposes, we exposed primary thymic DC to atrazine, MHC-I and CD11c expression was also decreased. Phenotypic changes in JAWSII DC maturation were associated with functional inhibition of maturation as, albeit at higher concentrations, receptor-mediated antigen uptake was increased by atrazine. Thus, our data suggest that atrazine directly targets DC maturation and that toxicants such as atrazine that efficiently remove MHC-I molecules from the DC surface are likely to contribute to immune evasion.
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Affiliation(s)
- Lesya M. Pinchuk
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Sang-Ryul Lee
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762, USA
| | - Nikolay M. Filipov
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762, USA
- Center for Environmental Health Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762, USA
- Address all correspondence to: Nick M. Filipov, Ph.D., Center for Environmental Health Sciences, Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, P. O. Box 6100, Mississippi State, MS 39762-6100. Phone: (662) 325-1208, Fax: (662) 325-1031, E-mail:
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19
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Avery PR, Lehman TL, Hoover EA, Dow SW. Sustained generation of tissue dendritic cells from cats using organ stromal cell cultures. Vet Immunol Immunopathol 2007; 117:222-35. [PMID: 17376541 DOI: 10.1016/j.vetimm.2007.02.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2006] [Revised: 01/31/2007] [Accepted: 02/05/2007] [Indexed: 12/14/2022]
Abstract
Currently most dendritic cells (DC) for in vitro study are generated from bone marrow or peripheral blood by culture in high concentrations of GM-CSF and other cytokines. However, in mice it is also possible to generate DC from spleen cells using long-term stromal cell cultures. To determine whether tissue DC could be also be generated from cats, we established stromal cell cultures from a number of different tissues of newborn cats. We found that stromal cell cultures from spleen, lung, liver, kidney, brain, and lymph node tissues were all capable of spontaneously generating DC over long periods of time (months), without requiring the addition of exogenous cytokines. The tissue DC generated from these stromal cell cultures could be readily isolated at high purity by simple mechanical detachment. The feline tissue DC expressed high levels of CD11c, CD11b, and MHC Class II and variable levels of CD80 and CD14 and exhibited high levels of spontaneous macropinocytosis. Moreover, DC from spleen stromal cell cultures, but not DC from lung or liver stromal cell cultures, stimulated mixed-lymphocyte reactions. The DC generated from the stromal cell cultures were relatively independent of GM-CSF for survival and proliferation, indicative of a dependence on other growth factors produced by the stromal cells. These results suggest that tissues of young cats contain a population of resident DC progenitor cells that under appropriate conditions are capable of spontaneous proliferation and generation of immature DC.
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Affiliation(s)
- Paul R Avery
- Department of Microbiology, Immunology, and Pathology, Colorado State University, Ft. Collins, CO 80523, United States
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20
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Zhao Y, Jackson SM, Aitken R. The bovine antibody repertoire. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2006; 30:175-86. [PMID: 16054212 DOI: 10.1016/j.dci.2005.06.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Cattle are able to produce a full range of Ig classes including the long-elusive IgD through rearrangement of their germline genes. Several IgL groupings have been reported but as in several other livestock species (e.g. sheep, rabbits, chickens), rearrangement per se fails to generate significant IgH diversity. This is largely because of the modest number of bovine VH segments that participate in rearrangement and their conserved sequences. Perhaps in compensation, bovine Ig heavy chains carry CDR3 sequences of exceptional length. Processes that operate post-rearrangement to generate diversity remain ill defined as are the location, timing and triggers to these events. Reagents are needed to understand better the maturation of B lymphocytes, their responses to antigens and cytokines, and to provide standards for the quantitation of Ig responses in cattle; recombinant methods may help meet this need as Ab engineering technologies become more widely used.
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Affiliation(s)
- Yaofeng Zhao
- Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska University Hospital at Huddinge, SE-14186 Stockholm, Sweden
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21
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Lee SR, Pharr GT, Cooksey AM, McCarthy FM, Boyd BL, Pinchuk LM. Differential detergent fractionation for non-electrophoretic bovine peripheral blood monocyte proteomics reveals proteins involved in professional antigen presentation. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2006; 30:1070-83. [PMID: 16566999 DOI: 10.1016/j.dci.2006.02.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2005] [Revised: 02/08/2006] [Accepted: 02/09/2006] [Indexed: 05/08/2023]
Abstract
Professional antigen presenting cells (APC), dendritic cells (DC) and their myeloid progenitors, monocytes/macrophages are critical controllers of innate and adaptive immunity. Here we show that differential detergent fractionation (DDF) analysis of bovine monocytes reveals proteins related to antigen pattern recognition, uptake and presentation to immunocompetent lymphocytes. We identify 53 bovine proteins involved in immune function of professional APC. In particular, 13 adhesion molecules, three toll-like receptors (TLR1, 6 and 8), three antigen uptake-related proteins (including mannose receptor [MR] precursor), and eight actin-like proteins involved in active endocytosis were identified. In addition, MHC class I and II-related proteins, cytokines, active substances and growth factors have been identified. We conclude that the DDF approach can provide interpretable and meaningful functional information concerning protein expression profiles associated with monocyte activation, transformation into macrophages and/or immature DC, and maturation of monocyte-derived DC in the presence of multiple bovine pathogens.
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Affiliation(s)
- S-R Lee
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, MS, 39762-6100, USA
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22
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Sprague WS, Pope M, Hoover EA. Culture and comparison of feline myeloid dendritic cells vs macrophages. J Comp Pathol 2005; 133:136-45. [PMID: 16038926 DOI: 10.1016/j.jcpa.2005.03.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2004] [Accepted: 03/07/2005] [Indexed: 11/26/2022]
Abstract
To gain insight into the role of dendritic cells (DCs) in feline immunodeficiency virus (FIV) infection and immunity, methods were developed to culture feline myeloid DCs from CD14(+) monocytes with a combination of human recombinant granulocyte-macrophage colony-stimulating factor (hrGM-CSF) and interleukin-4 (hrIL-4). These cells were compared with feline macrophages cultured in the presence of hrGM-CSF. As with DCs in other species, feline DCs showed uniformly high MHC class II expression, moderate B7.1 expression, potent induction of the allogeneic mixed leucocyte reaction (MLR), and moderate uptake of fluorescein isothiocyanate-dextran (FITC-DX) in the endocytic assay. In comparison with feline macrophages, DCs showed higher expression of MHC class II, similar expression of B7.1, CD14, CXCR4 and CD1a, and lower expression of CD11b. When placed on alcian blue-coated glass slides, DCs differed from macrophages in showing a greater tendency to spread out; they also had characteristic fine cytoplasmic processes instead of the broader pseudopodia of macrophages. Basal IL-12 mRNA expression and FITC-DX uptake were greater in DCs than in macrophages. Unlike feline DCs, feline macrophages exhibited a dose-dependent suppressive effect in the MLR. Feline DCs propagated in vitro should prove useful in the development of DC-mediated vaccination and therapy for infectious and neoplastic feline diseases. Additionally, macrophages cultured with GM-CSF provide a potential means of studying the mechanism of immunosuppression in cats.
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Affiliation(s)
- W S Sprague
- Department of Microbiology, Immunology and Pathology, Colorado State University, 1619 Campus Delivery, Fort Collins, CO 80523-1619, USA
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23
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Miranda de Carvalho C, Bonnefont-Rebeix C, Rigal D, Chabanne L. "Dendritic cells in different animal species: an overview". ACTA ACUST UNITED AC 2005; 54:85-93. [PMID: 16019158 DOI: 10.1016/j.patbio.2005.04.005] [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] [Received: 03/25/2005] [Accepted: 04/13/2005] [Indexed: 12/30/2022]
Abstract
The comprehension of the immune system and the role of DC in the pathological diseases may contribute to their use in veterinary medicine in the prevention and treatment of many diseases. Currently, most dendritic cell (DC) research occurs in the human and murine model systems on the generation of cells from the bone marrow or peripheral blood mononuclear cells (PBMC) cultured in vitro. Despite the lack of available immunological reagents such as antibodies and cytokines, analogous cells have been generated and identified in many different species and reviewed in this study.
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Affiliation(s)
- C Miranda de Carvalho
- Etablissement français du sang, 1-3, rue du Vercors, 69007 Lyon, France; Ecole nationale vétérinaire de Lyon, 1, avenue Bourgelat, 69380 Marcy l'Etoile, France.
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24
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Kashino SS, Resende J, Sacco AMS, Rocha C, Proença L, Carvalho WA, Firmino AA, Queiroz R, Benavides M, Gershwin LJ, De Miranda Santos IKF. Boophilus microplus: the pattern of bovine immunoglobulin isotype responses to high and low tick infestations. Exp Parasitol 2005; 110:12-21. [PMID: 15804374 DOI: 10.1016/j.exppara.2005.01.006] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2004] [Revised: 01/19/2005] [Accepted: 01/20/2005] [Indexed: 10/25/2022]
Abstract
Cattle present variable levels of resistance to ticks and the immune correlates of these heritable phenotypes must be known in order to develop effective vaccines. The antibody responses to tick salivary antigens were examined in cattle of tick-susceptible (Holstein) and tick-resistant (Nelore) breeds. After heavy infestations, levels of IgG1 and IgG2 antibodies decreased in Holsteins and remained the same in Nelores. Conversely, levels of IgE antibodies increased in Holsteins. Different sizes of tick burdens modulated the IgG1 antibody response in a susceptible breed (Aberdeen): levels were higher than in controls in heavily infested animals, but not in those undergoing intermediary or minimal infestations. The three experimental groups presented similar levels of IgG2 antibodies. Levels of IgE antibodies were higher only in animals undergoing intermediate infestations. These results indicate that tick infestations suppress the IgG antibody response in susceptible breeds, that IgE antibodies are not protective, and that the dose of tick saliva modulates the isotype of host antibody responses.
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Affiliation(s)
- Suely S Kashino
- Empresa Brasileira de Pesquisa Agropecuária--Embrapa, Brasília DF, Brazil
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25
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Boyd BL, Lee TM, Kruger EF, Pinchuk LM. Cytopathic and non-cytopathic bovine viral diarrhoea virus biotypes affect fluid phase uptake and mannose receptor-mediated endocytosis in bovine monocytes. Vet Immunol Immunopathol 2004; 102:53-65. [PMID: 15451615 DOI: 10.1016/j.vetimm.2004.06.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2004] [Revised: 05/27/2004] [Accepted: 06/11/2004] [Indexed: 10/26/2022]
Abstract
We have used non-cytopathic (ncp) and cytopathic (cp) bovine viral diarrhoea viruses (BVDV) to determine how the two biotypes affect mannose receptor (MR)-mediated endocytosis and fluid phase uptake in bovine monocytes. We have demonstrated that endocytosis in uninfected monocytes after 1 h of culture was mediated by the MR and fluid phase uptake, and after 24 h of culture it was mediated via fluid phase uptake only. Both cp and ncp BVDV affected the mechanisms of antigen uptake in monocytes. Endocytosis in BVDV infected monocytes, unlike in uninfected cells, was MR-independent and mediated by fluid phase uptake after 1 h of infection. The 24-h-BVDV infection changed the antigen uptake mechanisms to become MR- and fluid phase uptake-dependent. We conclude that antigen uptake, an important antigen presenting cell (APC) function, is affected in the early stage of BVDV infection during the first 24 h, with both BVDV biotypes, cp and ncp, having similar effects on monocyte antigen uptake in cattle. By influencing the early antigen uptake function of APC, BVDV might disrupt the function of monocytes as professional APC and contribute to the specific immunotolerance to BVDV.
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MESH Headings
- Animals
- Antigens, Viral/immunology
- Antigens, Viral/physiology
- Bovine Virus Diarrhea-Mucosal Disease/immunology
- Bovine Virus Diarrhea-Mucosal Disease/metabolism
- Bovine Virus Diarrhea-Mucosal Disease/virology
- Cattle
- Cytopathogenic Effect, Viral/immunology
- Dextrans/immunology
- Diarrhea Viruses, Bovine Viral/genetics
- Diarrhea Viruses, Bovine Viral/immunology
- Disease Reservoirs/veterinary
- Endocytosis/immunology
- Endocytosis/physiology
- Female
- Fluorescein-5-isothiocyanate/analogs & derivatives
- Lectins, C-Type/immunology
- Lectins, C-Type/metabolism
- Mannose Receptor
- Mannose-Binding Lectins/immunology
- Mannose-Binding Lectins/metabolism
- Monocytes/immunology
- Monocytes/virology
- RNA, Viral/chemistry
- RNA, Viral/genetics
- Receptors, Cell Surface/immunology
- Receptors, Cell Surface/metabolism
- Reverse Transcriptase Polymerase Chain Reaction/veterinary
- Viral Envelope Proteins/chemistry
- Viral Envelope Proteins/genetics
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Affiliation(s)
- Bobbie L Boyd
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, PO Box 6100, 39762-6100, USA
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26
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Kruger EF, Boyd BL, Pinchuk LM. Bovine monocytes induce immunoglobulin production in peripheral blood B lymphocytes. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2003; 27:889-897. [PMID: 12880638 DOI: 10.1016/s0145-305x(03)00080-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Although a role for monocytes and monocyte-derived dendritic cells (DC) in the activation of T cells is well established, it is less clear to what extent DC and their precursors, monocytes, regulate B cell immune responses. Here we show that regulatory mechanisms similar to those in humans are in place in the bovine immune system. In vitro culture of bovine monocytes with bovine B cells activated by the anti-CD3 triggered CD4+ T cells or through immunoglobulin (Ig) receptor crosslinking induces B cell Ig secretion. Unlike bovine monocyte-derived DC, monocytes do not promote Ig class switching to IgG and IgA in activated peripheral blood B cells. These results suggest that bovine monocytes are capable of directly inducing Ig secretion in activated bovine peripheral blood B cells, but do not provide the signals for B cell Ig class switching.
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Affiliation(s)
- E F Kruger
- Department of Basic Sciences, College of Veterinary Medicine, Mississippi State University, P.O. Box 6100, Spring Street, Mississippi State, MS 39762-6100, USA
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