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Aliaga-Gaspar P, Hurtado-Guerrero I, Ciano-Petersen NL, Urbaneja P, Brichette-Mieg I, Reyes V, Rodriguez-Bada JL, Alvarez-Lafuente R, Arroyo R, Quintana E, Ramió-Torrentà L, Alonso A, Leyva L, Fernández O, Oliver-Martos B. Soluble Receptor Isoform of IFN-Beta (sIFNAR2) in Multiple Sclerosis Patients and Their Association With the Clinical Response to IFN-Beta Treatment. Front Immunol 2021; 12:778204. [PMID: 34975865 PMCID: PMC8716373 DOI: 10.3389/fimmu.2021.778204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 11/29/2021] [Indexed: 11/25/2022] Open
Abstract
Purpose Interferon beta receptor 2 subunit (IFNAR2) can be produced as a transmembrane protein, but also as a soluble form (sIFNAR2) generated by alternative splicing or proteolytic cleavage, which has both agonist and antagonist activities for IFN-β. However, its role regarding the clinical response to IFN-β for relapsing-remitting multiple sclerosis (RRMS) is unknown. We aim to evaluate the in vitro short-term effects and after 6 and 12 months of IFN-β therapy on sIFNAR2 production and their association with the clinical response in MS patients. Methods Ninety-four RRMS patients were included and evaluated at baseline, 6 and 12 months from treatment onset. A subset of 41 patients were classified as responders and non-responders to IFN-β therapy. sIFNAR2 serum levels were measured by ELISA. mRNA expression for IFNAR1, IFNAR2 splice variants, MxA and proteases were assessed by RT-PCR. The short-term effect was evaluated in PBMC from RRMS patients after IFN-β stimulation in vitro. Results Protein and mRNA levels of sIFNAR2 increased after IFN-β treatment. According to the clinical response, only non-responders increased sIFNAR2 significantly at both protein and mRNA levels. sIFNAR2 gene expression correlated with the transmembrane isoform expression and was 2.3-fold higher. While MxA gene expression increased significantly after treatment, IFNAR1 and IFNAR2 only slightly increased. After short-term IFN-β in vitro induction of PBMC, 6/7 patients increased the sIFNAR2 expression. Conclusions IFN-β administration induces the production of sIFNAR2 in RRMS and higher levels might be associated to the reduction of therapeutic response. Thus, levels of sIFNAR2 could be monitored to optimize an effective response to IFN-β therapy.
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Affiliation(s)
- Pablo Aliaga-Gaspar
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
- Facultad de Medicina, Universidad de Málaga, Málaga, Spain
| | - Isaac Hurtado-Guerrero
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
- Neuroinflammation Unit, Biotech Research and Innovation Centre (BRIC), Faculty of Health and Medical Sciences, Copenhagen Biocentre, University of Copenhagen, Copenhagen, Denmark
| | - Nicolas Lundahl Ciano-Petersen
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
- Red Andaluza de Investigación Clínica y Traslacional en Neurología (Neuro-Reca), Málaga, Spain
| | - Patricia Urbaneja
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
- Red Andaluza de Investigación Clínica y Traslacional en Neurología (Neuro-Reca), Málaga, Spain
| | - Isabel Brichette-Mieg
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Virginia Reyes
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
- Red Andaluza de Investigación Clínica y Traslacional en Neurología (Neuro-Reca), Málaga, Spain
| | - Jose Luis Rodriguez-Bada
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
| | - Roberto Alvarez-Lafuente
- Grupo de Investigación de Factores Ambientales en Enfermedades Degenerativas, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos (IdISSC), Madrid, Spain
- Red Española de Esclerosis Múltiple (REEM), Madrid, Spain
| | - Rafael Arroyo
- Servicio de Neurología, Hospital Universitario Quirónsalud, Madrid, Spain
| | - Ester Quintana
- Red Española de Esclerosis Múltiple (REEM), Madrid, Spain
- Servicio de Neurología, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
| | - Lluis Ramió-Torrentà
- Red Española de Esclerosis Múltiple (REEM), Madrid, Spain
- Servicio de Neurología, Hospital Universitari de Girona Doctor Josep Trueta, Girona, Spain
- Girona Biomedical Research Institute (IDIBGI), Girona, Spain
- Medical Sciences Department, University of Girona, Girona, Spain
| | - Ana Alonso
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
- Red Andaluza de Investigación Clínica y Traslacional en Neurología (Neuro-Reca), Málaga, Spain
| | - Laura Leyva
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
- Red Española de Esclerosis Múltiple (REEM), Madrid, Spain
| | - Oscar Fernández
- Departmento de Farmacología, Facultad de Medicina, Universidad de Málaga, Málaga, Spain
- *Correspondence: Begoña Oliver-Martos, ; Oscar Fernández,
| | - Begoña Oliver-Martos
- Neuroimmunology and Neuroinflammation Group, Instituto de Investigación Biomédica de Málaga (IBIMA), Unidad de Gestión Clínica (UGC) Neurociencias, Hospital Regional Universitario de Málaga, Málaga, Spain
- Red Andaluza de Investigación Clínica y Traslacional en Neurología (Neuro-Reca), Málaga, Spain
- Red Española de Esclerosis Múltiple (REEM), Madrid, Spain
- Departamento de Biología Celular, Genética y Fisiología, Área de Fisiología, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
- *Correspondence: Begoña Oliver-Martos, ; Oscar Fernández,
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Tang ZZ, Wang TY, Chen YM, Chen TY. Cloning and characterisation of type I interferon receptor 1 in orange-spotted grouper (Epinephelus coioides) for response to nodavirus infection. FISH & SHELLFISH IMMUNOLOGY 2020; 101:302-311. [PMID: 32335315 DOI: 10.1016/j.fsi.2020.04.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 03/23/2020] [Accepted: 04/19/2020] [Indexed: 06/11/2023]
Abstract
Grouper is known as a highly economical teleost species in the Asian aquaculture industry; however, intensive culture activities easily cause disease outbreak, especially viral disease. For the prevention of viral outbreaks, interferon (IFN) is among the major defence systems being studied in different species. Fish type I IFNs are known to possess antiviral properties similar to mammalian type I IFNs. In order to stimulate antiviral function, IFN will bind to its cognate receptor, the type I interferon receptor (IFNAR), composed of heterodimeric receptor subunits known as IFNAR1 and IFNΑR2. The binding of type I interferon to receptors assists in the transduction of signals from the external to internal environments of cells to activate biological responses. In order to study the function of IFN, we first need to understand IFN receptors. In this study, we cloned and identified IFNAR1 in orange-spotted grouper (osgIFNAR1) and noted the up-regulated mRNA expression of the receptor and downstream effectors in the head kidney cells with cytokine treatment. The transcriptional expression of osgIFNAR1, which is characterised using polyinosinic-polycytidylic acid (poly[I:C]) and lipopolysaccharide (LPS) treatments, indicated the involvement of osgIFNAR1 in the immune response of grouper. The subcellular localisation of osgIFNAR1 demonstrated scattering across the grouper cell. Viral infection showed the negative feedback regulation of osgIFNAR1 in grouper larvae. Further loss of function of IFNAR1 showed a decreased expression of the virus. This study reported the identification of osgIFNAR1 and characterisation of receptor sensitivity towards immunostimulants, cytokine response, and viral challenge in the interferon pathway of orange-spotted grouper and possible different role of the receptor in viral production. Together, these results provide a frontline report of the potential function of osgIFNAR1 in the innate immunity of teleost.
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Affiliation(s)
- Zhi Zhuang Tang
- Laboratory of Molecular Genetics, Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Agriculture Biotechnology Research Center, National Cheng Kung University, Tainan, 70101, Taiwan
| | - Ting-Yu Wang
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Agriculture Biotechnology Research Center, National Cheng Kung University, Tainan, 70101, Taiwan
| | - Young-Mao Chen
- Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Agriculture Biotechnology Research Center, National Cheng Kung University, Tainan, 70101, Taiwan; University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Bachelor Degree Program in Marine Biotechnology, College of Life Sciences, National Taiwan Ocean University, Keelung, 20224, Taiwan; Center of Excellence for the Oceans, National Taiwan Ocean University, Keelung, 20224, Taiwan
| | - Tzong-Yueh Chen
- Laboratory of Molecular Genetics, Department of Biotechnology and Bioindustry Sciences, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Institute of Biotechnology, College of Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Translational Center for Marine Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan; Agriculture Biotechnology Research Center, National Cheng Kung University, Tainan, 70101, Taiwan; University Center for Bioscience and Biotechnology, National Cheng Kung University, Tainan, 70101, Taiwan.
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Antiviral RNAi in Insects and Mammals: Parallels and Differences. Viruses 2019; 11:v11050448. [PMID: 31100912 PMCID: PMC6563508 DOI: 10.3390/v11050448] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 12/26/2022] Open
Abstract
The RNA interference (RNAi) pathway is a potent antiviral defense mechanism in plants and invertebrates, in response to which viruses evolved suppressors of RNAi. In mammals, the first line of defense is mediated by the type I interferon system (IFN); however, the degree to which RNAi contributes to antiviral defense is still not completely understood. Recent work suggests that antiviral RNAi is active in undifferentiated stem cells and that antiviral RNAi can be uncovered in differentiated cells in which the IFN system is inactive or in infections with viruses lacking putative viral suppressors of RNAi. In this review, we describe the mechanism of RNAi and its antiviral functions in insects and mammals. We draw parallels and highlight differences between (antiviral) RNAi in these classes of animals and discuss open questions for future research.
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Characterization of interferon α and β receptor IFNAR1 and IFNAR2 expression and regulation in the uterine endometrium during the estrous cycle and pregnancy in pigs. Theriogenology 2016; 88:166-173. [PMID: 27769575 DOI: 10.1016/j.theriogenology.2016.09.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 09/07/2016] [Accepted: 09/13/2016] [Indexed: 11/24/2022]
Abstract
Type I interferons (IFNs) bind to the heterodimeric receptor composed of IFN-α/β receptor 1 (IFNAR1) and IFN-α and β receptor 2 (IFNAR2) to transmit signals into the cell. It is well known that IFN-δ (IFND), a type I IFN, is secreted by the conceptus during early pregnancy in pigs. However, expression and regulation of IFNAR1 and IFNAR2 in the porcine uterine endometrium are not well understood. Thus, we analyzed the expression and regulation of IFNAR1 and IFNAR2 in the uterine endometrium during the estrous cycle and pregnancy and conceptus and chorioallantoic tissues during pregnancy in pigs. The IFNAR1 and IFNAR2 mRNAs were expressed in the uterine endometrium, and their levels on Day 12 of pregnancy were higher than those on Day 12 of the estrous cycle and highest during pregnancy. The IFNAR1 and IFNAR2 mRNAs were also expressed in conceptuses during early pregnancy, in chorioallantoic tissues during mid-to-term pregnancy, and in endometrial epithelial cells and chorionic membrane during mid-to-late pregnancy. The abundance of IFNAR1 and IFNAR2 mRNAs was increased by interleukin-1β (IL1B), and the abundance of IFNAR2 was increased by estradiol in endometrial tissue explants. Thus, IFNAR1 and IFNAR2 mRNAs were expressed in the uterine endometrium during the estrous cycle and pregnancy in a pregnancy status- and stage-specific manner, and their expression was affected by estradiol and/or IL1B. These results suggest that endometrial and conceptus IFNAR1 and IFNAR2 may mediate the action of type I IFNs during the implantation period for the establishment and maintenance of pregnancy in pigs.
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Samarajiwa SA, Mangan NE, Hardy MP, Najdovska M, Dubach D, Braniff SJ, Owczarek CM, Hertzog PJ. Soluble IFN receptor potentiates in vivo type I IFN signaling and exacerbates TLR4-mediated septic shock. THE JOURNAL OF IMMUNOLOGY 2014; 192:4425-35. [PMID: 24696235 DOI: 10.4049/jimmunol.1302388] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Circulating levels of a soluble type I IFNR are elevated in diseases, such as chronic inflammation, infections, and cancer, but whether it functions as an antagonist, agonist, or transporter is unknown. In this study, we elucidate the in vivo importance of the soluble type I IFNAR, soluble (s)IFNAR2a, which is generated by alternative splicing of the Ifnar2 gene. A transgenic mouse model was established to mimic the 10-15-fold elevated expression of sIFNAR2a observed in some human diseases. We generated transgenic mouse lines, designated SolOX, in which the transgene mRNA and protein-expression patterns mirrored the expression patterns of the endogenous gene. SolOX were demonstrated to be more susceptible to LPS-mediated septic shock, a disease model in which type I IFN plays a crucial role. This effect was independent of "classical" proinflammatory cytokines, such as TNF-α and IL-6, whose levels were unchanged. Because the increased levels of sIFNAR2a did not affect the kinetics of the increased interferonemia, this soluble receptor does not potentiate its ligand signaling by improving IFN pharmacokinetics. Mechanistically, increased levels of sIFNAR2a are likely to facilitate IFN signaling, as demonstrated in spleen cells overexpressing sIFNAR2a, which displayed quicker, higher, and more sustained activation of STAT1 and STAT3. Thus, the soluble IFNR is an important agonist of endogenous IFN actions in pathophysiological processes and also is likely to modulate the therapeutic efficacy of clinically administered IFNs.
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Affiliation(s)
- Shamith A Samarajiwa
- Centre for Innate Immunity and Infectious Diseases, Monash Institute of Medical Research, Monash University, Clayton, Victoria 3168, Australia
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Molecular characterization of the type I IFN receptor in two woodchuck species and detection of its expression in liver samples from woodchucks infected with woodchuck hepatitis virus (WHV). Cytokine 2012; 60:179-85. [PMID: 22705153 DOI: 10.1016/j.cyto.2012.05.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 05/15/2012] [Accepted: 05/17/2012] [Indexed: 02/06/2023]
Abstract
Type I interferons (IFN-α/β) serve as the first line of defense against viral infection and share the same type I IFN receptor (IFNAR) complex, which is composed of IFNAR1 and -2. The Eastern woodchuck (Marmota monax) and Chinese woodchuck (Marmota himalayana) are suitable for studying hepatitis B virus (HBV) infection. Here, the complete or partial sequences of the IFNARs of both species were obtained and analyzed. Small interference RNAs targeting wIFNAR1 and -2 specifically down-regulated the expression of wIFNAR1 and -2 and the IFN-stimulated gene MxA in a woodchuck cell line, respectively. IFNAR2 was significantly up-regulated in primary woodchuck hepatocytes stimulated with IFN-α or -γ. The expression of woodchuck IFNAR1 and -2 was decreased in woodchucks chronically infected with woodchuck hepatitis virus (WHV). These results are essential for studying type I IFN-related innate immunity and therapy in hepadnaviral infection in the woodchuck model.
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Xing F, Li Y, Liang S, Liu D, Jiang C, Zhang Y, Kang L, Jiang Y. cDNA cloning, genomic structure and mRNA expression pattern of porcine type I interferons receptor 2 gene. Int J Immunogenet 2011; 38:339-45. [PMID: 21649860 DOI: 10.1111/j.1744-313x.2011.01018.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Type I interferons (IFN) are important mediators of the host defence against viruses through binding to the cell surface receptors, among which the binding to type I IFN receptor 2 (IFNAR2) is the very first step initiating a complex signal transduction cascade. By using RT-PCR and 5' RACE approaches, we obtained porcine IFNAR2 cDNA, the nucleotide identity of its coding region is 57.53%, 67.45%, 74.07% and 74.63% to those of mouse, human, sheep and cattle, respectively; and the deduced protein of which shares 38.18%, 55.29%, 62.01% and 63.39% identity to those of mouse, human, sheep and cattle, respectively. The genomic structure of porcine IFNAR2 gene consists of nine exons and eight introns. Porcine IFNAR2 mRNA expression was detected in all tissues examined, being strong in the spleen, small intestine, cerebrum and uterus tissues and relatively weak in the stomach tissues. As compared with piglets, the expression of IFNAR2 mRNA was significantly higher in both liver and spleen of Laiwu adult pigs (P < 0.01); in Duroc pigs, however, significantly higher IFNAR2 mRNA expression was only found in adult liver (P < 0.05). In Duroc × Landrace × Yorkshire commercial pigs infected with porcine reproductive and respiratory syndrome virus (PRRSV), the expression of IFNAR2 mRNA in lung tissue was significantly down-regulated as compared to uninfected ones (P < 0.05).
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Affiliation(s)
- F Xing
- Shandong Provincial Key Laboratory of Animal Biotechnology and Disease Control and Prevention, College of Animal Science and College of Veterinary Medicine, Shandong Agricultural University, Taian, China
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Pham NLL, Badovinac VP, Harty JT. A default pathway of memory CD8 T cell differentiation after dendritic cell immunization is deflected by encounter with inflammatory cytokines during antigen-driven proliferation. THE JOURNAL OF IMMUNOLOGY 2009; 183:2337-48. [PMID: 19635915 DOI: 10.4049/jimmunol.0901203] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Inflammatory cytokines induced by infection or vaccination with adjuvant act directly or indirectly on CD8 T cells to modulate their expansion, contraction, and acquisition of memory characteristics. Importantly, the initial exposure of naive T cells to inflammatory cytokines may occur before, during, or after their interaction with stimulating dendritic cells (DC) and it is unknown whether and how the timing of cytokine exposure impacts the CD8 T cell response. In this study, we use an immunization strategy with peptide-coated mature DC that, in the absence of inflammatory cytokines, results in a transient effector phase followed by the accelerated acquisition of memory characteristics by the responding CD8 T cells. Induction of inflammatory cytokines by TLR agonists, at the time of DC immunization or 2-4 days after DC immunization, prevented the early acquisition of memory characteristics by the responding CD8 T cells. Interestingly, although induction of inflammatory cytokines at the time of DC immunization increased the effector response, induction of inflammatory cytokines after DC immunization did not promote further expansion of the responding CD8 T cells but still prevented their early acquisition of memory characteristics. In contrast, induction of inflammatory cytokines 2 days before DC immunization did not prevent the CD8 T cells from early acquisition of memory characteristics. Furthermore, TLR ligand-induced inflammatory cytokines had the most significant impact on the phenotype and function of proliferating CD8 T cells. These data suggest that a default pathway of memory CD8 T cell differentiation is deflected toward sustained effector commitment by encounter with inflammatory cytokines during Ag-driven proliferation.
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Affiliation(s)
- Nhat-Long L Pham
- Interdisciplinary Graduate Program in Immunology, University of Iowa, Iowa City, IA 52242, USA
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Oostingh GJ, Schmittner M, Ehart AK, Tischler U, Duschl A. A high-throughput screening method based on stably transformed human cells was used to determine the immunotoxic effects of fluoranthene and other PAHs. Toxicol In Vitro 2008; 22:1301-10. [DOI: 10.1016/j.tiv.2008.03.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2007] [Revised: 03/03/2008] [Accepted: 03/09/2008] [Indexed: 11/25/2022]
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Field J, Alderuccio F, Hertzog P, Toh BH. GM-CSF-induced autoimmune gastritis in interferon alpha receptor deficient mice. J Autoimmun 2008; 31:274-80. [PMID: 18501559 DOI: 10.1016/j.jaut.2008.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Experimental autoimmune gastritis (EAG), a mouse model of human autoimmune gastritis, is characterised by gastric mononuclear cell infiltrates and parietal and zymogenic cell destruction. The gastritis is accompanied by circulating auto-antibodies to parietal cell-associated gastric H(+)/K(+) ATPase. As interferon alpha has been implicated in the regulation of immune responses, we asked whether EAG induced by the local transgenic expression of granulocyte-macrophage colony stimulating factor (GM-CSF) in the stomach (PC-GMCSF transgenic mice) would be affected by deficiency of its binding receptor. To address this, we crossed PC-GMCSF transgenic mice with mice deficient in interferon alpha (IFNalpha) receptor2 (IFNAR2). We found that EAG development in the PC-GMCSF transgenic mice was not affected by IFNAR2 deficiency. There was no difference in severity of gastric pathology, nor in autoantibody levels in the IFNAR2 deficient mice compared to wild-type, and heterozygous littermates. We conclude that the local transgenic expression of GM-CSF in the stomach overrides any possible modulatory effects of IFNAR2 on EAG development.
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Affiliation(s)
- Judith Field
- Department of Medicine, Monash University, Clayton, Victoria 3168, Australia
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Wang H, Zhou M, Brand J, Huang L. Inflammation activates the interferon signaling pathways in taste bud cells. J Neurosci 2007; 27:10703-13. [PMID: 17913904 PMCID: PMC2096741 DOI: 10.1523/jneurosci.3102-07.2007] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2007] [Revised: 08/20/2007] [Accepted: 08/20/2007] [Indexed: 11/21/2022] Open
Abstract
Patients with viral and bacterial infections or other inflammatory illnesses often experience taste dysfunctions. The agents responsible for these taste disorders are thought to be related to infection-induced inflammation, but the mechanisms are not known. As a first step in characterizing the possible role of inflammation in taste disorders, we report here evidence for the presence of interferon (IFN)-mediated signaling pathways in taste bud cells. IFN receptors, particularly the IFN-gamma receptor IFNGR1, are coexpressed with the taste cell-type markers neuronal cell adhesion molecule and alpha-gustducin, suggesting that both the taste receptor cells and synapse-forming cells in the taste bud can be stimulated by IFN. Incubation of taste bud-containing lingual epithelia with recombinant IFN-alpha and IFN-gamma triggered the IFN-mediated signaling cascades, resulting in the phosphorylation of the downstream STAT1 (signal transducer and activator of transcription protein 1) transcription factor. Intraperitoneal injection of lipopolysaccharide or polyinosinic:polycytidylic acid into mice, mimicking bacterial and viral infections, respectively, altered gene expression patterns in taste bud cells. Furthermore, the systemic administration of either IFN-alpha or IFN-gamma significantly increased the number of taste bud cells undergoing programmed cell death. These findings suggest that bacterial and viral infection-induced IFNs can act directly on taste bud cells, affecting their cellular function in taste transduction, and that IFN-induced apoptosis in taste buds may cause abnormal cell turnover and skew the representation of different taste bud cell types, leading to the development of taste disorders. To our knowledge, this is the first study providing direct evidence that inflammation can affect taste buds through cytokine signaling pathways.
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Affiliation(s)
- Hong Wang
- Monell Chemical Senses Center, Philadelphia, Pennsylvania 19104-3308, and
| | - Minliang Zhou
- Monell Chemical Senses Center, Philadelphia, Pennsylvania 19104-3308, and
| | - Joseph Brand
- Monell Chemical Senses Center, Philadelphia, Pennsylvania 19104-3308, and
- Department of Biochemistry, School of Dental Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Liquan Huang
- Monell Chemical Senses Center, Philadelphia, Pennsylvania 19104-3308, and
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de Weerd NA, Samarajiwa SA, Hertzog PJ. Type I interferon receptors: biochemistry and biological functions. J Biol Chem 2007; 282:20053-7. [PMID: 17502368 DOI: 10.1074/jbc.r700006200] [Citation(s) in RCA: 277] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Affiliation(s)
- Nicole A de Weerd
- Centre for Functional Genomics and Human Disease, Monash Institute of Medical Research, Monash University, Clayton, Victoria 3168, Australia
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Morbitzer M, Herget T. Expression of gastrointestinal glutathione peroxidase is inversely correlated to the presence of hepatitis C virus subgenomic RNA in human liver cells. J Biol Chem 2004; 280:8831-41. [PMID: 15623509 DOI: 10.1074/jbc.m413730200] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
There is great medical need to develop novel therapies for treatment of human hepatitis C virus (HCV). By gene expression analysis of three HCV-subgenomic RNA replicon cell lines, we identified cellular proteins whose expression is affected by the presence of HCV and therefore may serve as drug targets. Data from cDNA array filter hybridization, as well as from Northern and Western blotting, revealed that the gastrointestinal-glutathione peroxidase (GI-GPx) was drastically down-regulated (up to 20-fold) in all replicon cell lines tested. Concomitantly, total cellular glutathione peroxidase activity was drastically reduced, which rendered these human liver cells more susceptible toward oxidative stress. Interferon alpha caused down-regulation of the HCV-replicon followed by recovery of GI-GPx expression to nearly normal levels. Furthermore, expression of GI-GPx in replicon cells by gene transduction caused down-regulation of HCV RNA in a dose-dependent manner. Moreover, activating the endogenous gene coding for GI-GPx by all-trans-retinoic acid (RA) was sufficient to cause down-regulation of the HCV replicon. A small interfering RNA duplex abrogated GI-GPx up-regulation by RA and concomitantly suppression of HCV. The RA effect was dependent on the presence of sodium selenite, was reversible, and was independent of RNA-activated protein kinase. Taken together, these results show that HCV inhibits the expression of GI-GPx in replicon cells to promote its intracellular propagation. Modulation of GI-GPx activity may open new avenues of treatment for HCV patients.
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Affiliation(s)
- Monika Morbitzer
- AXXIMA Pharmaceuticals AG, Max-Lebsche-Platz 32, 81377 Munich, Germany
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Hardy MP, McGGettrick AF, O'Neill LAJ. Transcriptional regulation of the human TRIF (TIR domain-containing adaptor protein inducing interferon beta) gene. Biochem J 2004; 380:83-93. [PMID: 14960149 PMCID: PMC1224148 DOI: 10.1042/bj20040030] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2004] [Revised: 02/06/2004] [Accepted: 02/09/2004] [Indexed: 01/24/2023]
Abstract
TRIF [TIR (Toll/interleukin-1 receptor) domain-containing adaptor protein inducing interferon beta; also known as TICAM-1 (TIR-containing adaptor molecule-1)] is a key adaptor for TLR3 (Toll-like receptor 3)- and TLR4-mediated signalling. We have performed a detailed annotation of the human TRIF gene and fine analysis of the basal and inducible promoter elements lying 5' to the site of initiation of transcription. Human TRIF maps to chromosome 19p13.3 and is flanked upstream by TIP47, which encodes the mannose 6-phosphate receptor binding protein, and downstream by a gene encoding FEM1a, a human homologue of the Caenorhabditis elegans Feminisation-1 gene. Using promoter-reporter deletion constructs, we identified a distal region with the ability to negatively regulate basal transcription and a proximal region containing an Sp1 (stimulating protein 1) site that confers approx. 75% of basal transcriptional activity. TRIF expression can be induced by multiple stimuli, such as the ligands for TLR2, TLR3 and TLR4, and by the pro-inflammatory cytokines tumour necrosis factor alpha and interleukin-1alpha. All of these stimuli act via an NF-kappaB (nuclear factor-kappaB) motif at position -127. In spite of the presence of a STAT1 (signal transduction and activators of transcription 1) motif at position -330, the addition of type I or type II interferon had no effect on TRIF activity. The human TRIF gene would therefore appear to be regulated primarily by NF-kappaB.
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MESH Headings
- Adaptor Proteins, Vesicular Transport/biosynthesis
- Adaptor Proteins, Vesicular Transport/genetics
- Animals
- Base Sequence
- Binding Sites
- Cells, Cultured
- Chromosome Mapping
- Chromosomes, Human, Pair 19/genetics
- Gene Expression Regulation
- Humans
- Interleukin-1/physiology
- Luciferases/genetics
- Membrane Glycoproteins/physiology
- Mice
- Molecular Sequence Data
- NF-kappa B/physiology
- Promoter Regions, Genetic/genetics
- Protein Structure, Tertiary
- Receptors, Cell Surface/physiology
- Sequence Alignment
- Sequence Homology, Nucleic Acid
- Sp1 Transcription Factor/physiology
- Toll-Like Receptor 2
- Toll-Like Receptor 3
- Toll-Like Receptor 4
- Toll-Like Receptors
- Transcription Factors/metabolism
- Transcription, Genetic
- Transfection
- Tumor Necrosis Factor-alpha/physiology
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Affiliation(s)
- Matthew P Hardy
- Department of Biochemistry and Biotechnology Institute, Trinity College, University of Dublin, College Green, Dublin 2, Ireland.
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15
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Ito K, Tanaka H, Ito T, Sultana TA, Kyo T, Imanaka F, Ohmoto Y, Kimura A. Initial expression of interferon alpha receptor 2 (IFNAR2) on CD34-positive cells and its down-regulation correlate with clinical response to interferon therapy in chronic myelogenous leukemia. Eur J Haematol 2004; 73:191-205. [PMID: 15287917 DOI: 10.1111/j.1600-0609.2004.00275.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In order to investigate the mechanism of interferon-alpha (IFNalpha) action in the treatment of chronic myelogenous leukemia (CML), we examined surface expressions of both type I interferon receptor 1 (IFNAR1) and 2 (IFNAR2) subunits on CD34-positive cells in bone marrow (BM) in a total of 57 CML patients. Initial cell-surface IFNAR2 expression at diagnosis assessed by flow cytometry widely distributed but showed overall significantly higher expression in CML patients when compared with normal controls. In 15 fresh patients who subsequently received IFNalpha therapy, IFNAR2 expression at diagnosis was significantly higher in cytogenetic good responders than in poor responders. Down-regulation of IFNAR2 expression during IFNalpha therapy was observed only in good responders but not in poor responders. In addition to protein level, both initial high IFNAR2c mRNA expression level and its down-regulation during IFNalpha therapy, in purified CD34-positive cells, were also observed only in good responders. In contrast to IFNAR2, cell-surface IFNAR1 expression was generally lower than IFNAR2, and correlation between either the pretreatment level or down-regulation of IFNAR1 and clinical response was not evident. With in vitro IFNalpha stimulation, CD34-positive cells showed down-regulations of cell-surface IFNAR2, and IFNAR1 to a lesser extent, in one good-responder patient, but not in one poor-responder patient. Serum soluble interferon receptor (sIFNR) was higher in untreated CML patients than in normal controls, without any correlation with clinical response to IFNalpha. Thus, the pretreatment protein and mRNA expression levels of IFNAR2 and their down-regulations during IFNalpha therapy correlate well with IFNalpha response in CML patients.
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MESH Headings
- Adult
- Aged
- Antigens, CD34
- Bone Marrow Cells/chemistry
- Down-Regulation/drug effects
- Female
- Flow Cytometry
- Humans
- Interferon-alpha/pharmacology
- Interferon-alpha/therapeutic use
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/metabolism
- Male
- Membrane Proteins
- Middle Aged
- RNA, Messenger/drug effects
- Receptor, Interferon alpha-beta
- Receptors, Interferon/analysis
- Receptors, Interferon/biosynthesis
- Receptors, Interferon/genetics
- Treatment Outcome
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Affiliation(s)
- Kinro Ito
- Department of Hematology and Oncology, Division of Clinical and Experimental Oncology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Japan
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16
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Stumpo R, Kauer M, Martin S, Kolb H. IL-10 induces gene expression in macrophages: partial overlap with IL-5 but not with IL-4 induced genes. Cytokine 2004; 24:46-56. [PMID: 14561490 DOI: 10.1016/s1043-4666(03)00270-9] [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: 10/27/2022]
Abstract
The hypothesis that IL-10, in addition to down-regulating pro-inflammatory activities of macrophages, induces an alternative state of macrophage reactivity was tested. We therefore conducted a systematic search for genes induced by IL-10 using the method of suppression subtractive hybridisation. Of an initial 1,300 candidate clones obtained, several screening rounds led to the identification of 51 clones which were reproducibly at least twofold up-regulated in mouse J774 macrophages in response to treatment with IL-10. Of these, 41 genes were homologous to known genes involved in cell metabolism or immunoregulation, five contained novel sequences and another five were homologous to ESTs without known function. One major finding was that about 25% of the IL-10 genes were also found expressed in response to IFNgamma, and several of these also reappeared in IL-4 or IL-5 induced mRNA species. Hence, Th1 and Th2 type cytokines may elicit a common basal activation response in macrophages. The second major finding was that 57% of IL-10 induced genes reappeared in IL-5 induced mRNA but no more than 18% were also found in IL-4 induced mRNA of J774 cells. We conclude that the gene expression response to IL-10 in macrophages is partially different from the response to IL-5 and is substantially different from the response to IL-4, which suggests an unexpected diversity of biological phenotypes induced by different Th2 type cytokines.
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Affiliation(s)
- Rita Stumpo
- Department of Immunology, School of Pharmacy and Biochemistry, University of Buenos Aires and IDEHU, National Research Council for Science and Technology, Junín 956, 4th Floor. (1113), Buenos Aires, Argentina.
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17
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Hardy MP, O'Neill LAJ. The Murine Irak2 Gene Encodes Four Alternatively Spliced Isoforms, Two of Which Are Inhibitory. J Biol Chem 2004; 279:27699-708. [PMID: 15082713 DOI: 10.1074/jbc.m403068200] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The interleukin-1 receptor-associated kinases (IRAKs) are important downstream signaling components of Toll-like receptors (TLRs). To date, four mammalian IRAKs have been found, namely IRAK-1, IRAK-2, IRAK-4, and IRAK-M. Herein, we show a detailed analysis of the genomic region encompassing the murine Irak2 gene and the molecular cloning of four isoforms of Irak2 (designated Irak2a, Irak2b, Irak2c, and Irak2d) generated by alternative splicing at the 5'-end of the gene. This alternative splicing has direct effects on the expression of the N-terminal death domain and/or inter-domain. No evidence of similar alternative splicing was found for the human IRAK2 gene. When overexpressed, Irak2a and Irak2b potentiated NF-kappaB activation by lipopolysaccharide. Importantly, Irak2c and Irak2d were inhibitory. The promoter for Irak2c differed from that of the other Irak2 isoforms in that it contained putative NF-kappaB binding sites. Lipopolysaccharide induced the expression of Irak2c, indicating a possible negative feedback effect on the signaling pathway. Alternative splicing of the Irak2 gene in mice will therefore generate agonistic or antagonistic Irak2 isoforms, which is likely to have consequences for the regulation of TLR signaling. These observations identify another distinguishing feature between mice and humans in the TLR system that is likely to be due to differences in the selective pressure imposed by pathogens on each species during evolution.
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Affiliation(s)
- Matthew P Hardy
- Department of Biochemistry and the Biotechnology Institute, Trinity College Dublin, Dublin 2, Ireland
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18
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Flodström-Tullberg M. Viral infections: their elusive role in regulating susceptibility to autoimmune disease. Microbes Infect 2003; 5:911-21. [PMID: 12919859 DOI: 10.1016/s1286-4579(03)00161-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Viral infections may trigger autoimmune disease. Complicating our understanding of how viral infections promote disease is the realization that viral infections can sometimes prevent auto-aggressive reactions. Here, we will discuss recent findings that provide insights into how viral infections may alter susceptibility to autoimmunity.
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Affiliation(s)
- Malin Flodström-Tullberg
- Department of Medicine, The Karolinska Institute, Huddinge University Hospital, S-141 86 Stockholm, Sweden.
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Nagabhushan TL, Reichert P, Walter MR, Murgolo NJ. Type I interferon structures: Possible scaffolds for the interferon-alpha receptor complex. CAN J CHEM 2002. [DOI: 10.1139/v02-158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The structures of several type I interferons (IFNs) are known. We review the structural information known for IFN alphas and compare them to other interferons and cytokines. We also review the structural information known or proposed for IFNcell receptor complexes. However, the structure of the IFN cell receptor IFN receptor2 (IFNAR2) and IFN receptor1 (IFNAR1) complex has not yet been determined. This paper describes a structural model of human IFN-IFNAR2/IFNAR1 complex using human IFN-α2bdimer as the ligand. Both the structures of recombinant human IFN-α2band IFN-β were determined by X-ray crystallography as zinc-mediated dimers. Our proposed model was generated using human IFN-α2bdimer docked with IFNAR2/IFNAR1. We compare our model with the receptor complex models proposed for IFN-β and IFN-γ to contrast similarities and differences. The mutual binding sites of human IFN-α2band IFNAR2/IFNAR1 complex are consistent with available mutagenesis studies.Key words: three dimensional structure, antiviral activity, receptor, interferon.
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