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Mycobacterial Heat Shock Proteins in Sarcoidosis and Tuberculosis. Int J Mol Sci 2023; 24:ijms24065084. [PMID: 36982159 PMCID: PMC10048904 DOI: 10.3390/ijms24065084] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/01/2023] [Accepted: 03/05/2023] [Indexed: 03/09/2023] Open
Abstract
Pathological similarities between sarcoidosis (SA) and tuberculosis (TB) suggest the role of mycobacterial antigens in the etiopathogenesis of SA. The Dubaniewicz group revealed that not whole mycobacteria, but Mtb-HSP70, Mtb-HSP 65, and Mtb-HSP16 were detected in the lymph nodes, sera, and precipitated immune complexes in patients with SA and TB. In SA, the Mtb-HSP16 concentration was higher than that of Mtb-HSP70 and that of Mtb-HSP65, whereas in TB, the Mtb-HSP16 level was increased vs. Mtb-HSP70. A high Mtb-HSP16 level, induced by low dose-dependent nitrate/nitrite (NOx), may develop a mycobacterial or propionibacterial genetic dormancy program in SA. In contrast to TB, increased peroxynitrite concentration in supernatants of peripheral blood mononuclear cell cultures treated with Mtb-HSP may explain the low level of NOx detected in SA. In contrast to TB, monocytes in SA were resistant to Mtb-HSP-induced apoptosis, and CD4+T cell apoptosis was increased. Mtb-HSP-induced apoptosis of CD8+T cells was reduced in all tested groups. In Mtb-HSP-stimulated T cells, lower CD8+γδ+IL-4+T cell frequency with increased TNF-α,IL-6,IL-10 and decreased INF-γ,IL-2,IL-4 production were present in SA, as opposed to an increased presence of CD4+γδ+TCR cells with increased TNF-α,IL-6 levels in TB, vs. controls. Mtb-HSP modulating the level of co-stimulatory molecules, regulatory cells, apoptosis, clonal deletion, epitope spread, polyclonal activation and molecular mimicry between human and microbial HSPs may also participate in the induction of autoimmunity, considered in SA. In conclusion, in different genetically predisposed hosts, the same antigens, e.g., Mtb-HSP, may induce the development of TB or SA, including an autoimmune response in sarcoidosis.
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Immune dysregulation and pathogenic pathways mediated by common infections in rheumatoid arthritis. Folia Microbiol (Praha) 2023; 68:325-335. [PMID: 36680729 DOI: 10.1007/s12223-023-01036-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 01/12/2023] [Indexed: 01/22/2023]
Abstract
Rheumatoid arthritis (RA) is one of the world's most prevalent inflammatory autoimmune diseases, affecting between 0.4 and 1.3% of the population. The susceptibility to RA appears to be influenced by a complex interaction between a favorable genetic background and the existence of a specific immune reaction against a wide range of environmental variables. Among the known environmental variables, infections are believed to have a significant role in promoting the formation of autoimmune disorders, which are frequently caused by specific microorganisms. Infections have been linked to RA in recent medical studies. In this study, we selected the most prevalent infections associated with RA from the literature and described the data confirming their pathogenic role in RA. Our investigation included Mycobacterium, Porphyromonas gingivalis, Aggregatibacter actinomycetemcomitans, Proteus mirabilis, Epstein-Barr virus, parvovirus, and Prevotella copri.
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Pathak VK, Singh I, Singh SV, Sengupta U. Corroboration of cross-reactivity between Mycobacterium leprae and hosts' salivary and cutaneous proteins: A hope for prognostic biomarkers for the pathogenesis of reactions in leprosy. Front Microbiol 2022; 13:1075053. [PMID: 36560940 PMCID: PMC9764389 DOI: 10.3389/fmicb.2022.1075053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Accepted: 11/22/2022] [Indexed: 12/12/2022] Open
Abstract
Introduction Immunological reactions are frequent complications that may occur either before, during, or after treatment and affect 30-50% of leprosy patients. The presence of autoantibodies like rheumatoid factor, antinuclear factor, and antibodies to host collagen, keratin, actin, myosin, endothelial cells, and myelin basic protein (MBP) has been earlier reported in leprosy patients. The purpose of this study was to identify cross-reactive proteins in clinical samples such as saliva and slit skin scrapings (SSS) of leprosy patients which could be utilised as prognostic biomarkers for Type 1 Reaction (T1R) in leprosy. Method A total of 10 leprosy patients in T1R and 5 healthy volunteers were recruited. The protein was extracted from their SSS and saliva samples, thereafter, isoelectric focusing (IEF) and two-dimensional PAGE were performed to analyse the proteins. Furthermore, the cross-reactivity was identified by western blotting host proteins in gel against purified IgG from Mycobacterium leprae soluble antigen (MLSA)- hyperimmunized rabbit sera, thereafter, cross-reactive proteins were identified by MS/MS. The cross-reactive host proteins were analysed for homologous bacterial proteins and B cell epitopes (BCEs) were predicted by using bioinformatic tools. Results A total of five spots of salivary proteins namely S100-A9, 35.3 kDa, and 41.5 kDa proteins, Serpin peptidase inhibitor (clade A), Cystatin SA-III, and four spots of SSS namely 41.4 kDa protein, Alpha-1 antitrypsin, vimentin, and keratin 1, were identified as cross-reactive. Further, a total of 22 BCEs of cross-reactive host proteins were predicted and visualised. Discussion This data provides strong evidence of cross-reactivity/molecular mimicry between host and pathogen in leprosy patients with reaction. These BCEs of cross-reactive proteins could be further studied to predict reactions and may be utilised as an early diagnostic biomarker for T1R in leprosy.
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Affiliation(s)
- Vinay Kumar Pathak
- Stanley Browne Laboratory, The Leprosy Mission Community Hospital, New Delhi, India,Department of Biotechnology, GLA University, Mathura, Uttar Pradesh, India
| | - Itu Singh
- Stanley Browne Laboratory, The Leprosy Mission Community Hospital, New Delhi, India,*Correspondence: Itu Singh, ;
| | - Shoor Vir Singh
- Department of Biotechnology, GLA University, Mathura, Uttar Pradesh, India
| | - Utpal Sengupta
- Stanley Browne Laboratory, The Leprosy Mission Community Hospital, New Delhi, India,Utpal Sengupta,
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Pathak VK, Singh I, Singh SV, Sengupta U. Mimicking B and T cell epitopes between Mycobacterium leprae and host as predictive biomarkers in type 1 reaction in leprosy. Sci Rep 2021; 11:24431. [PMID: 34952925 PMCID: PMC8709860 DOI: 10.1038/s41598-021-04135-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 12/16/2021] [Indexed: 11/09/2022] Open
Abstract
Several Mycobacterial infections including leprosy and tuberculosis are known to evoke autoimmune responses by modulating homeostatic mechanism of the host. Presence of autoantibodies like, rheumatoid factor, anti-nuclear factor and antibodies to host, collagen, keratin, myelin basic protein (MBP) and myosin, have been earlier reported in leprosy patients. In the present study, we detected the role of mimicking epitopes between Mycobacterium leprae and host components in the induction of autoimmune response in leprosy. Based on our previous findings, we predicted and synthesized a total of 15 mimicking linear B cell epitopes (BCE) and 9 mimicking linear T cell epitopes (TCE) of keratin and MBP. Humoral and cell-mediated immune responses against these epitopes were investigated in Non-reaction (NR), Type 1 reaction (T1R) leprosy patients, and healthy controls. We observed significantly higher levels of antibodies against 8 BCE in T1R in comparison to NR leprosy patients. Further, we also found 5 TCE significantly associated with lymphocyte proliferation in the T1R group. Our results indicated that these epitopes play a key role in the induction of autoimmune response in leprosy and are also strongly associated with the inflammatory episodes of T1R. Conclusively, these molecules may be employed as a biomarker to predict the inflammatory episodes of T1R.
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Affiliation(s)
- Vinay Kumar Pathak
- Stanley Browne Laboratory, The Leprosy Mission Community Hospital, Nand Nagari, Shahdara, New Delhi, India, 110093.,GLA University, Mathura, UP, India, 281406
| | - Itu Singh
- Stanley Browne Laboratory, The Leprosy Mission Community Hospital, Nand Nagari, Shahdara, New Delhi, India, 110093.
| | | | - Utpal Sengupta
- Stanley Browne Laboratory, The Leprosy Mission Community Hospital, Nand Nagari, Shahdara, New Delhi, India, 110093.
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Sogkas G, Atschekzei F, Adriawan IR, Dubrowinskaja N, Witte T, Schmidt RE. Cellular and molecular mechanisms breaking immune tolerance in inborn errors of immunity. Cell Mol Immunol 2021; 18:1122-1140. [PMID: 33795850 PMCID: PMC8015752 DOI: 10.1038/s41423-020-00626-z] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 12/11/2020] [Indexed: 02/01/2023] Open
Abstract
In addition to susceptibility to infections, conventional primary immunodeficiency disorders (PIDs) and inborn errors of immunity (IEI) can cause immune dysregulation, manifesting as lymphoproliferative and/or autoimmune disease. Autoimmunity can be the prominent phenotype of PIDs and commonly includes cytopenias and rheumatological diseases, such as arthritis, systemic lupus erythematosus (SLE), and Sjogren's syndrome (SjS). Recent advances in understanding the genetic basis of systemic autoimmune diseases and PIDs suggest an at least partially shared genetic background and therefore common pathogenic mechanisms. Here, we explore the interconnected pathogenic pathways of autoimmunity and primary immunodeficiency, highlighting the mechanisms breaking the different layers of immune tolerance to self-antigens in selected IEI.
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Affiliation(s)
- Georgios Sogkas
- Department of Rheumatology and Immunology, Hannover Medical School, Hanover, Germany.
- Hannover Medical School, Cluster of Excellence RESIST (EXC 2155), Hanover, Germany.
| | - Faranaz Atschekzei
- Department of Rheumatology and Immunology, Hannover Medical School, Hanover, Germany
- Hannover Medical School, Cluster of Excellence RESIST (EXC 2155), Hanover, Germany
| | - Ignatius Ryan Adriawan
- Department of Rheumatology and Immunology, Hannover Medical School, Hanover, Germany
- Hannover Medical School, Cluster of Excellence RESIST (EXC 2155), Hanover, Germany
| | - Natalia Dubrowinskaja
- Department of Rheumatology and Immunology, Hannover Medical School, Hanover, Germany
- Hannover Medical School, Cluster of Excellence RESIST (EXC 2155), Hanover, Germany
| | - Torsten Witte
- Department of Rheumatology and Immunology, Hannover Medical School, Hanover, Germany
- Hannover Medical School, Cluster of Excellence RESIST (EXC 2155), Hanover, Germany
| | - Reinhold Ernst Schmidt
- Department of Rheumatology and Immunology, Hannover Medical School, Hanover, Germany
- Hannover Medical School, Cluster of Excellence RESIST (EXC 2155), Hanover, Germany
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Role of Infections in the Pathogenesis of Rheumatoid Arthritis: Focus on Mycobacteria. Microorganisms 2020; 8:microorganisms8101459. [PMID: 32977590 PMCID: PMC7598258 DOI: 10.3390/microorganisms8101459] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 09/17/2020] [Accepted: 09/21/2020] [Indexed: 12/16/2022] Open
Abstract
Rheumatoid arthritis (RA) is a systemic inflammatory autoimmune disease characterized by chronic erosive polyarthritis. A complex interaction between a favorable genetic background, and the presence of a specific immune response against a broad-spectrum of environmental factors seems to play a role in determining susceptibility to RA. Among different pathogens, mycobacteria (including Mycobacterium avium subspecies paratuberculosis, MAP), and Epstein–Barr virus (EBV), have extensively been proposed to promote specific cellular and humoral response in susceptible individuals, by activating pathways linked to RA development. In this review, we discuss the available experimental and clinical evidence on the interplay between mycobacterial and EBV infections, and the development of the immune dysregulation in RA.
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Saini C, Tarique M, Rai R, Siddiqui A, Khanna N, Sharma A. T helper cells in leprosy: An update. Immunol Lett 2017; 184:61-66. [PMID: 28235552 DOI: 10.1016/j.imlet.2017.02.013] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 01/24/2017] [Accepted: 02/20/2017] [Indexed: 01/02/2023]
Abstract
Leprosy is an ancient disease caused by gram positive, rod shaped bacilli called Mycobacterium leprae. Patients present with varied clinico-pathological disease depending on the host immune response to Mycobacterium leprae. Thus tuberculoid (TT) and lepromatous (LL) patients represent two ends of a spectrum where the former shows limited disease, high T cell mediate immune (CMI) response and low antibody (HI) levels in serum. In contrast the latter has low T cell and high humoral immune response i.e antibody levels. The mechanisms underlying these differences have been investigated intensely; however, there is no consensus on the primary immunological basis. Over three decades, Th1 and Th2 paradigm were thought to underling tuberculoid and lepromatous disease respectively. However many patients were shown to have mixed Th1/Th2 pattern of (IFN-γ/IL-4) cytokines. The present review was undertaken with a view to understand the T cells and cytokine dysregulation in leprosy. In recent years the sub classes of T cells that are Regulatory in nature (Treg) have been implicated in immune diseases where they were shown to suppress T cell functions. Additionally Th17 cells secreting IL-17A, IL17F, were implicated in immune inflammation. Taken together these regulatory cells may play a part in influencing immune responses in leprosy.
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Affiliation(s)
- Chaman Saini
- Department of Biochemistry, All India Institute of Medical sciences, New Delhi 110029, India.
| | - Mohd Tarique
- Department of Biochemistry, All India Institute of Medical sciences, New Delhi 110029, India
| | - Reeta Rai
- Department of Biochemistry, All India Institute of Medical sciences, New Delhi 110029, India
| | | | - Neena Khanna
- Department of Dermatology, All India Institute of Medical sciences, New Delhi 110029, India
| | - Alpana Sharma
- Department of Biochemistry, All India Institute of Medical sciences, New Delhi 110029, India.
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Gutlapalli VR, Sykam A, Nayarisseri A, Suneetha S, Suneetha LM. Insights from the predicted epitope similarity between Mycobacterium tuberculosis virulent factors and its human homologs. Bioinformation 2015; 11:517-24. [PMID: 26770024 PMCID: PMC4702028 DOI: 10.6026/97320630011517] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Revised: 12/13/2015] [Accepted: 12/13/2015] [Indexed: 01/22/2023] Open
Abstract
Mycobacterium tuberculosis is known to be associated with several autoimmune diseases such as systemic lupus erythematous, rheumatoid arthritis and multiple sclerosis. This is attributed to sequence similarity between virulent factors and human proteins. Therefore, it is of interest to identify such regions in the virulent factors to assess potential autoimmune related information. M. tb specific virulent factors were downloaded from the VFDB database and its human homologs were identified using the sequence comparison search tool BLASTP. Both virulent proteins and their corresponding human homologs were further scanned for epitopes (B cell and HLA class I and II allele specific) using prediction programs (BCPRED and NETMHC). Data shows the presence of matching 22 B-cell, 79 HLA class II and 16 HLA class I specific predicted epitopes in these virulent factors having human homologs. A known peptide (HAFYLQYKNVKVDFA) associated with autoimmune atopic dermatitis is shown in the superoxide dismutase homolog structures of the bacterium (PDB ID: 1IDS) and human (PDB ID: 2QKC). This data provides insight into the understanding of infection-associated auto-immunity.
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Affiliation(s)
- Venkata Ravi Gutlapalli
- CODEWEL Nireekshana-ACET, Hyderabad, Telangana-500029, India
- Centre for Biotechnology, AcharyaNagarjuna University, Nagarjuna Nagar, Guntur, Andhra Pradesh 522510, India
| | - Aparna Sykam
- CODEWEL Nireekshana-ACET, Hyderabad, Telangana-500029, India
- Centre for Biotechnology, AcharyaNagarjuna University, Nagarjuna Nagar, Guntur, Andhra Pradesh 522510, India
| | - Anuraj Nayarisseri
- Bioinformatics Research Laboratory, Eminent Biosciences, Vijaynagar, Indore - 452010, Madhya Pradesh, India
| | - Sujai Suneetha
- CODEWEL Nireekshana-ACET, Hyderabad, Telangana-500029, India
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Kida I, Kobayashi S, Takeuchi K, Tsuda H, Hashimoto H, Takasaki Y. Antineutrophil cytoplasmic antibodies against myeloperoxidase, proteinase 3, elastase, cathepsin G and lactoferrin in Japanese patients with rheumatoid arthritis. Mod Rheumatol 2014. [DOI: 10.3109/s10165-010-0356-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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10
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Iron-containing proteins lactoferrin and ferritin in biological media of patients with pulmonary tuberculosis. Bull Exp Biol Med 2013; 154:618-21. [PMID: 23658882 DOI: 10.1007/s10517-013-2013-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Salivary and serum levels of lactoferrin and ferritin were measured in patients with pulmonary tuberculosis and patients with other nonspecific respiratory diseases. Measurements of lactoferrin in biological media and particularly in the serum of patients with pulmonary tuberculosis proved to be a highly informative test for monitoring the disease course, i.e. for evaluation of inflammatory process activity. Ferritin level can serve as an indicator of tissue destruction during inflammation and of the course of rehabilitation processes.
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Chodisetti SB, Rai PK, Gowthaman U, Pahari S, Agrewala JN. Potential T cell epitopes of Mycobacterium tuberculosis that can instigate molecular mimicry against host: implications in autoimmune pathogenesis. BMC Immunol 2012; 13:13. [PMID: 22435930 PMCID: PMC3359254 DOI: 10.1186/1471-2172-13-13] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2011] [Accepted: 03/21/2012] [Indexed: 01/26/2023] Open
Abstract
Background Molecular mimicry between microbial antigens and host-proteins is one of the etiological enigmas for the occurrence of autoimmune diseases. T cells that recognize cross-reactive epitopes may trigger autoimmune reactions. Intriguingly, autoimmune diseases have been reported to be prevalent in tuberculosis endemic populations. Further, association of Mycobacterium tuberculosis (M. tuberculosis) has been implicated in different autoimmune diseases, including rheumatoid arthritis and multiple sclerosis. Although, in silico analyses have identified a number of M. tuberculosis specific vaccine candidates, the analysis on prospective cross-reactive epitopes, that may elicit autoimmune response, has not been yet attempted. Here, we have employed bioinformatics tools to determine T cell epitopes of homologous antigenic regions between M. tuberculosis and human proteomes. Results Employing bioinformatics tools, we have identified potentially cross-reactive T cell epitopes restricted to predominant class I and II alleles of human leukocyte antigens (HLA). These are similar to peptides of mycobacterial proteins and considerable numbers of them are promiscuous. Some of the identified antigens corroborated with established autoimmune diseases linked with mycobacterial infection. Conclusions The present study reveals many target proteins and their putative T cell epitopes that might have significant application in understanding the molecular basis of possible T cell autoimmune reactions during M. tuberculosis infections.
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Affiliation(s)
- Sathi Babu Chodisetti
- Immunology Laboratory, CSIR-Institute of Microbial Technology, Chandigarh 160036, India
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Lactoferrin-lipopolysaccharide (LPS) binding as key to antibacterial and antiendotoxic effects. Int Immunopharmacol 2011; 12:1-9. [PMID: 22101278 DOI: 10.1016/j.intimp.2011.11.002] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2011] [Revised: 09/01/2011] [Accepted: 11/03/2011] [Indexed: 01/03/2023]
Abstract
Lactoferrin (Lf), a multifunctional protein of the innate immune response, seems to act as a permeabilizing agent of Gram negative bacteria, apparently due to its interaction with enterobacterial lipopolysaccharide (LPS) on the bacterial surface. In both human and bovine Lf, a six residue sequence lying in an 18-loop region of the lactoferricin domain is key to Lf-LPS binding. There is much evidence that, by its action on LPS, Lf destabilizes the bacterial membrane and therefore increases bacterial permeability. By itself, Lf is not an effective antibacterial agent, but it permits the penetration of the bacterial membrane by some antibacterial substances whose hydrophobicity otherwise limits their efficacy. Additionally, Lf neutralizes free LPS by keeping the latter from forming complexes that activate TLR-4 signaling pathways. Such pathways, when over-activated, lead to the abundant production of pro-inflammatory mediators such as tumor necrosis factor (TNF) with fatal consequences to the host. The effect of Lf in reducing inflammation and destabilizing Gram negative bacteria has clinical implications in the control of sepsis, multiple organ dysfunction and bacterial invasion.
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Sierra VG. Is a new tuberculosis vaccine necessary and feasible? A Cuban opinion. Tuberculosis (Edinb) 2007; 86:169-78. [PMID: 16677860 DOI: 10.1016/j.tube.2006.03.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2005] [Accepted: 03/08/2006] [Indexed: 10/24/2022]
Abstract
Mycobacterium tuberculosis kills more human beings worldwide than any other pathogen. An estimated two billion people are already infected with the bacterium. In 2006, tuberculosis (TB) will kill nearly one million more people than in 1992. In Cuba, TB is not a serious health problem any more and we are striving to eliminate it in the near future. The most widely applied human vaccine in the world is BCG. It is also a safe vaccine except when it is applied to immunocompromised persons. Its protective efficacy is a controversial topic. In spite of this, more than 80 years of experience with this vaccine has demonstrated that BCG is effective, at least in significantly preventing childhood TB, including the meningeal and disseminated forms of the disease, but does not protect against the predominant pulmonary form of the disease in adults, which means that our best TB vaccine now is inadequate; we therefore need a new vaccine. The following facts, apart from the experience with BCG, support discussion about the feasibility of a new and better TB vaccine: Less than 10% of the 2 billion TB infected persons develop active disease. It has been demonstrated that HIV + TB co-infection increases 30 times the risk of contracting active TB and it increases the risk of being killed by the bacterium. Some new vaccine candidates, now under development and evaluation, are showing promising results in preclinical studies, and a few of them have entered clinical trials. There seems to be a consensus that a new TB vaccine will be feasible, but some challenging issues must be positively solved, such as, the lack of universally accepted correlates for protection, improved diagnostics, and final vaccine efficacy evaluation conducted on large phase III clinical trials in underdeveloped countries. The ethical, economical, organizational and scientific questions involved in this global task are enormous, but feasible.
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Iwata Y, Ohta S, Kawai K, Yamahana J, Sugimori H, Ishida YI, Saito K, Miyamori T, Futami K, Arakawa Y, Hirota YI, Wada T, Yokoyama H, Yoshida K. Shunt nephritis with positive titers for ANCA specific for proteinase 3. Am J Kidney Dis 2004; 43:e11-6. [PMID: 15112193 DOI: 10.1053/j.ajkd.2004.01.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The authors report a case of shunt nephritis with antineutrophil cytoplasmic autoantibody (ANCA) and review 2 similar cases. A 55-year-old man was admitted to our hospital for continuous fever and foot edema in 2002. A ventriculoperitoneal shunt was implanted because of a brain abscess and subsequent hydrocephalus in 1987; it was changed to a ventriculoatrial (VA) shunt in 1995. Urinary analysis showed proteinuria (5.4 g/d) and microscopic hematuria. Laboratory data showed renal dysfunction and hypocomplementemia. ANCA specific for proteinase 3 (PR3-ANCA) was positive in his serum, and blood culture grew Propionibacterium acnes. Renal biopsy results showed membranoproliferative glomerulonephritis type I. Therefore, the VA shunt was replaced, and antibiotics were administered. Oral prednisolone was initiated at a dose of 50 mg/d. Proteinuria and the serum levels of creatinine were improved concomitant with normalization of the serum complement levels and the decrease in serum PR3-ANCA titer. Similarly, another 2 cases reported in the literature of PR3-ANCA-positive shunt nephritis caused by P acnes and Gemella morbillorum showed good outcomes after removal of the shunt and administration of antibiotics with or without steroid therapy.
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Affiliation(s)
- Yasunori Iwata
- Department of Internal Medicine, Toyama City Hospital, Toyama, Japan.
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Brás A, Ruiz-Vela A, García-Domingo D, Martínez C. Apoptosis as a scaffold for building up the B cell repertoire. Ann N Y Acad Sci 2001; 926:13-29. [PMID: 11193029 DOI: 10.1111/j.1749-6632.2000.tb05595.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Control of cell number is determined by a balance between cell proliferation and cell death, both of which are highly regulated processes, with numerous checks and balances. Cells control their own death through activation of an internally coded suicide program that, when activated, initiates a characteristic form of cell death called apoptosis. This type of regulation allows elimination of cells that have been produced in excess, that have developed improperly, or that have sustained genetic damage. Apoptosis is, therefore, the most common physiological form of cell death and occurs during embryonic development, tissue remodeling, immune regulation, cell activation and tumor regression.
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Affiliation(s)
- A Brás
- Department of Immunology & Oncology, Centro Nacional de Biotecnología/CSIC, Universidad Autónoma, Campus de Cantoblanco, E-28049 Madrid, Spain
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16
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Zimecki M, Kruzel ML. Systemic or local co-administration of lactoferrin with sensitizing dose of antigen enhances delayed type hypersensitivity in mice. Immunol Lett 2000; 74:183-8. [PMID: 11064098 DOI: 10.1016/s0165-2478(00)00260-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Lactoferrin (LF), a major defense protein synthesized and stored in granulocytes has been implicated in maintaining immune homeostasis during an insult-induced metabolic imbalance. In this study, we demonstrated that lactoferrin augments the delayed type hypersensitivity (DTH) response to specific antigens in mice. Lactoferrin (LF) was given to mice orally or intraperitoneally (i.p. ) at the time of immunization, or subcutaneously (s.c.) in a mixture with the immunizing doses of the following antigens, sheep red blood cells (SRBC), Calmette-Guerin bacillus (BCG) or ovalbumin (OVA). A DTH reaction was determined 24 h after administration of an eliciting dose of antigen as a specific increase in foot pad swelling. Lactoferrin enhanced DTH reaction to all studied antigens in a dose-dependent manner. Lactoferrin (LF) given to mice in conjunction with antigen administered in an incomplete Freund's adjuvant induced the DTH response at the level of control mice given antigen in a complete Freund's adjuvant. In addition, LF remarkably increased DTH response to a very small, otherwise non-immunogenic SRBC dose. The increase in DTH response was less pronounced for orally administered LF than for any other routes of administration, however, statistically significant augmentation was demonstrated for each antigen studied. Although the costimulatory action of LF was accompanied by the appearance of bovine lactoferrin-specific cellular responses in mice, it is very unlikely that such responses will be generated in humans, since bovine lactoferrin is a dietary antigen to which a tolerance has been acquired. Considering the involvement of LF in generation of stimulatory signals during the induction phase of an antigen specific immune responses, we suggest that LF may be useful for development of safer and more efficacious vaccination protocols.
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Affiliation(s)
- M Zimecki
- Department of Experimental Therapy, Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Wroclaw, Poland
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Locht H, Skogh T, Kihlström E. Anti-lactoferrin antibodies and other types of anti-neutrophil cytoplasmic antibodies (ANCA) in reactive arthritis and ankylosing spondylitis. Clin Exp Immunol 1999; 117:568-73. [PMID: 10469064 PMCID: PMC1905360 DOI: 10.1046/j.1365-2249.1999.01008.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Fifty-five serum samples from patients with reactive arthritis (ReA), 40 from patients with ankylosing spondylitis (AS) and three from patients with chronic sacroiliac joint arthritis were analysed for the presence of ANCA of IgG class by means of enzyme immunosorbent assay using lactoferrin (Lf), myeloperoxidase (MPO) and antigen extracted from azurophil granules ('alpha-antigen') containing proteinase 3 (PR3) as substrate. IgG-ANCA were found in 31 (56%) patients with ReA. Twenty-three (42%) had anti-Lf antibodies, nine (16%) had anti-MPO and eight (15%) had anti-alpha-antigen antibodies, none of which reacted with PR3. Only six (14%) AS or sacroiliac joint arthritis patients had ANCA (P < 0.001). Three (7%) had anti-Lf, two (5%) anti-MPO and two (5%) anti-alpha-antigen antibodies. Yersinia and Salmonella bacteria were separated by SDS-PAGE and blots were incubated with serum from rabbits immunized with human Lf. The hyperimmune serum recognized a band of 78 kD from both bacteria which was not seen when preimmune serum was used. The reaction to the 78-kD antigen could be completely inhibited when anti-Lf antibodies were absorbed on Lf coupled to cyanogen bromide-activated Sepharose, possibly indicating cross-reacting epitopes in Lf and enterobacterial antigen.
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Affiliation(s)
- H Locht
- Department of Health and Environment, Division of Rheumatology, Faculty of Health Sciences, Linköping University, Sweden.
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18
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Caccavo D, Afeltra A, Guido F, Di Monaco C, Ferri GM, Amoroso A, Vaccaro F, Bonomo L. Two spatially distant epitopes of human lactoferrin. Hybridoma (Larchmt) 1996; 15:263-9. [PMID: 8880213 DOI: 10.1089/hyb.1996.15.263] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Lactoferrin (LF) is an iron binding protein, which may represent a target for antineutrophil cytoplasmic antibodies (ANCA) in patients affected by rheumatoid arthritis, ulcerative colitis, and primary sclerosing cholangitis. Here we describe the production and characterization of two new monoclonal antibodies (MAbs) against human LF. These MAbs (AGM 10.14, an IgG1, and AGM 2.29, an IgG2b) recognize spatially distant epitopes of LF as assessed by cross-blocking experiments. We also demonstrated by indirect immunofluorescence that both MAbs react with ethanol-fixed neutrophil granulocytes showing a perinuclear staining pattern. AGM 2.29 and AGM 10.14 have been utilized as capture and labeled tracer antibody, respectively, in a double determinant immunoassay (DDIA) to measure soluble LF. The results obtained show that this DDIA allows us to quantify even low concentrations of LF, the maximal range of the assay sensitivity being between 12 and 780 ng/ml. Therefore, AGM 10.14 and AGM 2.29 may represent useful reagents for studying the role of autoantibodies to LF as well as for measuring soluble LF, which is a reliable secretory marker of neutrophil activation.
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Affiliation(s)
- D Caccavo
- Department of Medicina Clinica, University La Sapienza, Rome, Italy
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19
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Yang N, Shigeta H, Shi H, Teng CT. Estrogen-related receptor, hERR1, modulates estrogen receptor-mediated response of human lactoferrin gene promoter. J Biol Chem 1996; 271:5795-804. [PMID: 8621448 DOI: 10.1074/jbc.271.10.5795] [Citation(s) in RCA: 132] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
We have shown previously that estrogen-stimulated transcription from the human lactoferrin gene in RL95-2 endometrium carcinoma cells is mediated through an imperfect estrogen response element (ERE) at the 5 -flanking region of the gene. Upstream from the ERE, a DNA sequence (-418 to -378, FP1) was selectively protected from DNase I digestion by nuclear extracts from endometrial and mammary gland cell lines. In this report, using the electrophoresis mobility shift assay, site-directed mutagenesis, and DNA methylation interference analyses, we show that three different nuclear proteins bind to the FP1 region (C1, C2, and C3 sites). The nuclear receptor, COUP-TF, binds to the C2 site. Mutations in the C1 binding region abolish C1 complex formation and reduce estrogen-dependent transcription from the lactoferrin ERE. When the imperfect ERE of the lactoferrin gene is converted to a perfect palindromic structure, the enhancing effect of the C1 binding element for estrogen responsiveness was abolished. We isolated a complementary DNA (cDNA) clone from an RL95-2 expression library that encodes the C1 site-binding protein. The encoded polypeptide maintains 99% amino acid identity with the previously described orphan nuclear receptor hERR1. A 2.2-kilobase mRNA was detected in RL95-2 cells by the newly isolated cDNA but not by the first 180 base pair of the published hERR1 sequence. By Western analysis, a major 42-kDa protein is detected in the RL95-2 nuclear extract with antibody generated against GST-hERR1 fusion protein. Finally, we show that the hERR1 interacts with the human estrogen receptor through protein-protein contacts.
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MESH Headings
- Amino Acid Sequence
- Base Sequence
- Binding Sites
- Breast
- Carcinoma, Endometrioid
- Cell Line
- Chloramphenicol O-Acetyltransferase/biosynthesis
- DNA Primers
- DNA, Complementary
- DNA, Neoplasm/metabolism
- DNA-Binding Proteins/metabolism
- Female
- Gene Expression
- Gene Library
- Glutathione Transferase/biosynthesis
- Humans
- Lactoferrin/biosynthesis
- Lactoferrin/genetics
- Methylation
- Molecular Sequence Data
- Mutagenesis, Insertional
- Mutagenesis, Site-Directed
- Nuclear Proteins/metabolism
- Promoter Regions, Genetic
- Receptors, Cytoplasmic and Nuclear/isolation & purification
- Receptors, Cytoplasmic and Nuclear/metabolism
- Receptors, Estrogen/isolation & purification
- Receptors, Estrogen/metabolism
- Recombinant Proteins/biosynthesis
- Regulatory Sequences, Nucleic Acid
- Transcription, Genetic
- Transfection
- Tumor Cells, Cultured
- ERRalpha Estrogen-Related Receptor
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Affiliation(s)
- N Yang
- Gene Regulation Group, Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA
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20
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Quinn A, Shinnick TM, Cunningham MW. Anti-Hsp65 antibodies recognize M proteins of group A streptococci. Infect Immun 1996; 64:818-24. [PMID: 8641786 PMCID: PMC173842 DOI: 10.1128/iai.64.3.818-824.1996] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Group A streptococcal M protein and the mycobacterial heat shock protein, hsp65, are strong bacterial immunogens that have been linked to arthritis and autoimmunity. Recent evidence has shown that streptococcal arthritis and adjuvant arthritis may be related to epitopes shared between group A streptococci and hsp65. We investigated the possibility that immunological similarities were shared between streptococcal M protein and hsp65. Antibodies against the 65-kDa heat shock protein of Mycobacterium tuberculosis were tested for reactivity with group A streptococci and purified recombinant M proteins (rM5 and rM6). Rabbit polyclonal anti-hsp65 serum was highly reactive with M type 5 Streptococcus pyogenes and rM5 and rM6 proteins in an enzyme-linked immunosorbent assay (ELISA). A mouse anti-hsp65 monoclonal antibody (MAb), IIC8, reacted with streptococcal M types 5, 6, 19, 24, and 49 in an ELISA but showed no reactivity with an isogenic streptococcal mutant which did not express M protein. Anti-hsp65 MAb IIC8 recognized rM5 and rM6 proteins in the ELISA, and MAbs IIC8 and IIH9 reacted strongly with rM6 protein in Western immunoblots. The binding of M protein by anti-hsp65 MAbs was shown to be inhibited by both hsp65 and M protein. These data show that anti-hsp65 antibodies recognize streptococcal M proteins.
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Affiliation(s)
- A Quinn
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, 73190, USA
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21
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Peen E, Eneström S, Skogh T. Distribution of lactoferrin and 60/65 kDa heat shock protein in normal and inflamed human intestine and liver. Gut 1996; 38:135-40. [PMID: 8566841 PMCID: PMC1382992 DOI: 10.1136/gut.38.1.135] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Immunisation against the mycobacterial heat shock protein (hsp-65) has been proposed to lead to production of autoantibodies against human lactoferrin. Such antibodies occur in ulcerative colitis and in primary sclerosing cholangitis. This study analysed the distribution of hsp-65 and lactoferrin in biopsy specimens from patients with inflammatory bowel disease and primary sclerosing cholangitis and studied whether immunisation against mycobacterial hsp-65 resulted in production of antilactoferrin antibodies and vice versa. Polyclonal rabbit antihuman lactoferrin and monoclonal mouse anti-hsp-65 (ML30) were used for immunohistochemistry on biopsy specimens from patients with inflammatory bowel disease and primary sclerosing cholangitis. Rats were immunised against human lactoferrin and mycobacterial hsp-65 respectively. Antibody measurements were done by enzyme immunosorbent assays. It was found that lactoferrin and hsp-60/65 were not codistributed. Lactoferrin was found on vascular endothelium and in nonparenchymal liver cells both in inflamed and uninflamed tissues, but only in the hepatocytes of inflamed liver. ML30 reactivity was not inhibited by antilactoferrin antibodies. Rat anti-hsp-65 serum had no detectable antilactoferrin antibodies. In conclusion, antilactoferrin antibodies probably do not arise by immunisation against mycobacterial hsp-65. Both nonparenchymal cells and hepatocytes probably participate in clearance of lactoferrin. Endothelial exposure of lactoferrin may have pathogenic implications in diseases with antilactoferrin autoantibodies.
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Affiliation(s)
- E Peen
- Department of Medical Microbiology, Faculty of Health Sciences, University of Linköping, Sweden
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22
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el-Zaatari FA, Naser SA, Engstrand L, Burch PE, Hachem CY, Whipple DL, Graham DY. Nucleotide sequence analysis and seroreactivities of the 65K heat shock protein from Mycobacterium paratuberculosis. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 1995; 2:657-64. [PMID: 8574825 PMCID: PMC170216 DOI: 10.1128/cdli.2.6.657-664.1995] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Mycobacterium paratuberculosis is the causative agent of Johne's disease, a chronic enteritis in ruminants. It has also been implicated as a possible cause of Crohn's disease, an inflammatory bowel disease of unknown etiology. The mycobacterial 65K heat shock proteins (hsp-65K) are among the most extensively studied mycobacterial proteins, and their immunogenic characteristics have been suggested to be the basis for autoimmunization in chronic inflammatory diseases. In this context, we isolated and sequenced the hsp-65K-encoding gene from our M. paratuberculosis PTB65K genomic library. A high degree of identity was found between the open reading frame (ORF) of the PTB65K gene and those of Mycobacterium tuberculosis (89.6%), Mycobacterium leprae (86.6%), and Mycobacterium avium 18 (98.8%). The amino acid sequence alignment of the PTB65K protein with the hsp-65K homologs revealed that the M. tuberculosis and M. leprae proteins each differed by 36 amino acid residues and that the M. avium 18 protein differed by 8 residues. We also investigated the humoral immune responses of animals with Johne's disease and patients with Crohn's disease against the recombinant PTB65K antigen. Immunoblot analysis showed that sera from only 3 of 10 clinically ill and 5 of 25 subclinically ill cows reacted with PTB65K. In addition, sera from two of two sheep and one of two goats with clinical symptoms of Johne's disease also reacted with PTB65K; 0 samples from 10 normal cows reacted. In humans, sera from 7 of 13 patients with Crohn's disease, 3 of 4 with tuberculosis, 5 of 6 with leprosy, 5 of 12 with non-inflammatory bowel disease, and 0 of 4 with ulcerative colitis reacted with the recombinant PTB65K antigen. These results indicate that this PTB65K heat shock protein is uninformative when used for serodiagnosis of Johne's disease in animals. However, in humans, the high intensity of antibody reactions of some sera from Crohn's disease patients compared with that from noninflammatory bowel disease patients showed a positive correlation with mycobacterial diseases.
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Affiliation(s)
- F A el-Zaatari
- Inflammatory Bowel Disease Laboratory, Veterans Affairs Medical Center, Houston, TX 77030, USA
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23
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24
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Teng C. Mouse lactoferrin gene: a marker for estrogen and epidermal growth factor. ENVIRONMENTAL HEALTH PERSPECTIVES 1995; 103 Suppl 7:17-20. [PMID: 8593866 PMCID: PMC1518891 DOI: 10.1289/ehp.95103s717] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Lactoferrin mRNA in the 21-day-old mouse uterus can be increased several hundredfold by estrogen. The physiological role of lactoferrin in mouse uterus is unclear; however, it can be a useful marker for the estrogen action in the uterus. The structural organization and the chromosome location of the lactoferrin gene are similar to members of the transferrin gene family. At the 5' flanking region of the lactoferrin gene, we have characterized two modules that respond to estrogen and growth factor stimulation. Each module is composed of either overlapping or multiple transcription factor-binding elements. The well-characterized estrogen and growth factor response modules in the mouse lactoferrin gene could serve as the foundation to understand the intricate molecular mechanisms of estrogen action and its relationship to growth factors.
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Affiliation(s)
- C Teng
- Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, NC 27709, USA
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25
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Martins TC, Aguas AP. Stress modulates acute inflammation triggered by mycobacteria in autoimmunity-prone and normal mice. Inflamm Res 1995; 44:393-9. [PMID: 8846198 DOI: 10.1007/bf01797867] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
We have investigated the effect of a single stress treatment of mice on the early cellular response (granulocyte influx) of acute inflammation that was produced by intraperitoneal inoculation of the animals with mycobacteria (10(6) bacilli of M. avium). Autoimmunity-prone (NZB/W) and normal (BALB/c, MRL, NZW) mice were submitted to the same stress (20 min of swimming) this given either before or simultaneously with the induction of the intraperitoneal mycobacteria-induced inflammation. Local inflammation was evaluated by the quantification of leukocytes harvested from the peritoneal cavity of the mice; this was done 30 and 60 minutes after the end of the stress treatment. We found that the stressor alone was able to increase the number of cells that were harvested from the peritoneal cavity; this may be due to stress-induced detachment of resident macrophages from the peritoneal walls. The autoimmunity-prone mice (NZB/W) showed a marked decrease in the number of inflammatory cells (mostly of granulocytes) when stress treatment was performed immediately before the triggering of inflammation; these stress-induced alterations were attenuated in normal mice (BALB/c and MRL strains), as well as in the non-autoimmune parent strain (NSW) of NZB/W mice. Modulation of the acute inflammatory response by stress was smaller if the stress was induced concomitantly with the triggering of inflammation; here, NZB/W were again the mice most affected by stress. Our data indicate that [1] stress is able to modify the acute inflammatory response of mice; [2] autoimmunity-prone mice are more sensitive to stress-induced modulation of inflammation than normal animals; and [3] the timing of stress (with regard to the initiation of inflammatory phenomena) is an important factor in the intensity of changes produced by stress in the early cellular response of acute inflammation.
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Affiliation(s)
- T C Martins
- Centre for Experimental Cytology, Abel Salazar Institute for the Biomedical Sciences, University of Porto, Portugal
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26
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Gross WL, Csernok E, Helmchen U. Antineutrophil cytoplasmic autoantibodies, autoantigens, and systemic vasculitis. APMIS 1995; 103:81-97. [PMID: 7748541 DOI: 10.1111/j.1699-0463.1995.tb01083.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Antineutrophil cytoplasmic antibodies (ANCA) encompass a heterogeneous group of autoantibodies targeting antigens in neutrophils (PMN), monocytes, and endothelial cells. ANCA are routinely detected by the indirect immunofluorescence technique (IFT) and at least three different patterns of fluorescence can be distinguished which have been assigned the acronyms cANCA, pANCA and aANCA. cANCA is mostly induced by proteinase 3 (PR3) antibodies (PR3-ANCA), and pANCA by myeloperoxidase (MPO) antibodies (MPO-ANCA), while aANCA has unidentified subspecificity. Over the past decade, ANCA have been the subject of extensive investigation. They have proved to be of significant value both as diagnostic tools and for follow-up in several forms of systemic vasculitis (e.g. Wegener's granulomatosis, WG; microscopic polyarteritis, MPA; Churg-Strauss syndrome, CSS) which are now termed 'ANCA-associated vasculitides'. Furthermore, it is suspected that the presence of ANCA is an important factor in the pathogenesis of these disease groups. Data regarding the detection of ANCA and their diagnostic value and role in the pathogenesis of vasculitic disorders will be discussed in this review. Growing evidence points to a pathophysiological and diagnostic relevance of the distribution of the ANCA target antigens PR3 and MPO (presence in the circulation, on cell membranes, and in tissue extracellularly). An autoimmune process has been implicated in the pathogenesis of ANCA-associated vasculitis, but it is uncertain which mechanism underlies the induction of the ANCA-related immunoresponse. In this paper mechanisms such as antigenic cross-reactivity between human PMN proteins and extrinsic antigens by molecular mimicry, idiotypic immunoglobulin regulation, and T-cell reactivity to PR3 and MPO will be discussed.
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Affiliation(s)
- W L Gross
- Department of Rheumatology, University of Lübeck, Germany
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27
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Vilagut L, Vila J, Viñas O, Parés A, Ginés A, Jiménez de Anta MT, Rodés J. Cross-reactivity of anti-Mycobacterium gordonae antibodies with the major mitochondrial autoantigens in primary biliary cirrhosis. J Hepatol 1994; 21:673-7. [PMID: 7529275 DOI: 10.1016/s0168-8278(94)80117-7] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Primary biliary cirrhosis is a chronic cholestatic liver disease associated with autoimmune disorders. Antimitochondrial autoantibodies and granulomatous portal lesions are characteristic in primary biliary cirrhosis. Since granuloma may be induced by Mycobacteria, and there is evidence implicating Mycobacteria as infectious agents capable of initiating autoimmunity, a study was performed to determine the presence of antibodies against 10 atypical Mycobacteria in 19 patients with primary biliary cirrhosis, and in 35 controls (25 patients with other chronic liver diseases and 10 healthy subjects). All primary biliary cirrhosis sera and none of the controls reacted with the extract from Mycobacterium gordonae, showing identical recognition profiles with two polypeptides of 70-65 and 55 kDa. No other reaction was found in primary biliary cirrhosis patients and in controls with the extracts from the other nine atypical Mycobacteria tested. Eluted immunoglobulins which reacted with the 70-65 and 55 kDa polypeptides from M. gordonae, bound to the mitochondrial antigens PDH-E2 and BCKDH-E2. Furthermore, when the extract from M. gordonae was tested with eluted immunoglobulins from recognized PDH-E2 and BCKDH-E2 by primary biliary cirrhosis patients, we observed both 70-65 and 55 kDa polypeptides. These data indicate that antibodies to M. gordonae, found in all primary biliary cirrhosis patients, cross-react with the major mitochondrial targets of the disease. We suggest that M. gordonae may play a potential pathogenic role in primary biliary cirrhosis.
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Affiliation(s)
- L Vilagut
- Laboratory of Microbiology, Hospital Clínic i Provincial, University of Barcelona, Spain
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28
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el-Zaatari FA, Naser SA, Engstrand L, Hachem CY, Graham DY. Identification and characterization of Mycobacterium paratuberculosis recombinant proteins expressed in E. coli. Curr Microbiol 1994; 29:177-84. [PMID: 7765093 DOI: 10.1007/bf01570760] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Mycobacterium paratuberculosis is the causative agent of Johne's disease, a chronic enteritis in ruminants, and it has also been isolated and identified from patients with Crohn's disease, an inflammatory bowel disease. The control of Johne's disease has been hampered by the lack of a reliable diagnostic test because of the large degree of antigenic cross-reactivity between mycobacterial and non-mycobacterial species. To help identify specific antigen(s) or epitope(s), an M. paratuberculosis expression library was screened with antibodies and DNA probes. In total, 54 clones were randomly picked, purified, and characterized by DNA probes and monoclonal antibodies with known specificity to individual mycobacterial antigens. Four clones carrying the heat shock protein 65K-, two representing the secreted protein 32K-, three representing the 21K-, and 20 clones representing the specific insertion element of M. paratuberculosis (IS900)-encoding genes and their gene products were identified and characterized. Well-defined recombinant antigens and/or epitopes representing M. paratuberculosis may facilitate the development of specific diagnostic tests and the investigation of their role in these chronic diseases.
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Affiliation(s)
- F A el-Zaatari
- Veterans Affairs Medical Center, Department of Medicine, Houston, Texas 77030
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29
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Shi H, Teng C. Characterization of a mitogen-response unit in the mouse lactoferrin gene promoter. J Biol Chem 1994. [DOI: 10.1016/s0021-9258(18)99971-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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30
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Hajeer AH, Bernstein RM. Antibody to mycobacterial 65-kD heat shock protein in commercial antisera. Clin Exp Immunol 1993; 94:544-7. [PMID: 7902791 PMCID: PMC1534447 DOI: 10.1111/j.1365-2249.1993.tb08232.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Inhibition ELISA and immunoblotting were used to examine the antigenic cross-reactivity claimed to exist between mycobacterial 65-kD heat shock protein (hsp65) and human lactoferrin. Commercially available anti-lactoferrin antibodies produced using either Freund's complete (FCA) or Freund's incomplete adjuvant were tested for binding to recombinant mycobacterial hsp65. Both antibody preparations showed reactivity with hsp65, this being greater with the antibody produced using FCA. However, we found no evidence of a cross-reaction. Lactoferrin failed to inhibit anti-hsp65 reactivity, while hsp65 itself did. Affinity purified anti-lactoferrin antibody showed no reaction with hsp65 by ELISA or immunoblotting. These data suggest that commercial anti-lactoferrin preparations are contaminated with antibodies to hsp65. A commercial anti-albumin antibody also bound to hsp65 in ELISA, so this may be a more general phenomenon.
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Affiliation(s)
- A H Hajeer
- Department of Rheumatology, University of Manchester Medical School, UK
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31
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Esaguy N, Freire O, Van Embden JD, Aguas AP. Lactoferrin triggers in vitro proliferation of T cells of Lewis rats submitted to mycobacteria-induced adjuvant arthritis. Scand J Immunol 1993; 38:147-52. [PMID: 8346415 DOI: 10.1111/j.1365-3083.1993.tb01706.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We have recently reported antigenic (B-cell) cross-reactivity between the mycobacterial 65 kDa heat shock protein (hsp65) and human lactoferrin (LF) and we suggested that this cross-reactivity might have a role in mycobacteria-associated autoimmune disease. Here, we have searched for anti-LF T-cell reactivity in Lewis rats submitted to a mycobacteria-triggered autoaggressive disorder (adjuvant arthritis, AA), an autoimmune disorder characterized by high anti-hsp65 reactivity. We have quantified the in vitro proliferative response to LF of lymph node and spleen cells of Lewis rats killed 9, 14 and 21 days after the immunization with the AA-triggering, mycobacteria-containing adjuvant (complete Freund's adjuvant, CFA). We found that LF induced significant proliferation of lymph node T cells of rats undergoing AA. This T-cell proliferation was not as marked as the one provoked by hsp65; it was, nevertheless, significantly higher (P < 0.05) than that produced by a non-arthritogenic antigen (i.e. albumin). T cells from naive or mineral oil (incomplete Freund's adjuvant, IFA) injected rats did not respond to LF or hsp65. These data indicate that LF may work as an accessory stimulatory factor of the T-cell autoreactivity associated with mycobacteria-induced arthritis.
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Affiliation(s)
- N Esaguy
- Center for Experimental Cytology, Abel Salazar Institute for the Biomedical Sciences, University of Porto, Portugal
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32
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Castro AP, Esaguy N, Aguas AP. Effect of mycobacterial infection in the lupus-prone MRL/lpr mice: enhancement of life span of autoimmune mice, amelioration of kidney disease and transient decrease in host resistance. Autoimmunity 1993; 16:159-66. [PMID: 8003610 DOI: 10.3109/08916939308993323] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We have used the MRL/lpr murine model of spontaneous lupus to investigate three questions in infection immunity: (1) does mycobacterial infection have any effect on the mortality of the autoimmunity-prone lpr mice?; (2) does the infection modify the progression of kidney disease of lpr lupus?; and (3) does the lpr gene change the resistance of mice to mycobacteria? Experimental infections were induced by intraperitoneal inoculation of 10(7) viable bacilli of Mycobacterium avium in 3 months old MRL/lpr mice and also in congeneic MRL/+ mice (lacking the lpr gene). MRL mice were sacrificed 1, 2.5 and 4 months after the M. avium injection. We found that infection caused lowering of urine protein concentration in lpr mice as compared with age-matched lpr controls. Mycobacteriosis also induced a marked decrease in the mortality of lpr animals, e.g. 85% of infected lpr mice reached the age of 7 months whereas only 10% of control lpr mice reached the same age. MRL/lpr mice showed, after 1 and 2.5 months of infection, higher mycobacterial loads than the congeneic non-lpr MRL mice; after 4 months of infection, however, differences in M. avium loads between the two groups of MRL mice became not statistically significant. We conclude that: (1) mycobacterial infection increases the life span of lpr mice; (2) the infection slows down the progression of kidney disease in the lupus-prone lpr animals; (3) the autoimmunity gene lpr is associated with a transient decrease in host resistance to mycobacteria.
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Affiliation(s)
- A P Castro
- Center for Experimental Cytology, Abel Salazar Institute for the Biomedical Sciences, University of Porto, Portugal
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33
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Skogh T, Peen E. Lactoferrin, anti-lactoferrin antibodies and inflammatory disease. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 1993; 336:533-8. [PMID: 8296671 DOI: 10.1007/978-1-4757-9182-2_97] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The nucleophilic properties of human lactoferrin (Lf) were demonstrated by immunofluorescence microscopy using cryostat rat tissue sections, and the nuclear/perinuclear distribution of Lf in ethanol-fixed human neutrophils was visualized with rabbit anti-human Lf, producing a P-ANCA/GS-ANA staining pattern. Prevention of complement activation by Lf was confirmed in a haemolytic assay. Antibodies (IgG) against human Lf were studied by ELISA in sera from patients with Crohn's disease, ulcerative colitis, primary sclerosing cholangitis, rheumatoid arthritis, systemic lupus erythematous and primary Sjögren's syndrome. Anti-Lf antibodies were found in high frequency in ulcerative colitis and primary sclerosing cholangitis, but only occasionally in the other conditions.
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Affiliation(s)
- T Skogh
- Dpt. Med. Microbiology, Faculty of Health Sciences, University of Linköping, Sweden
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Peen E, Almer S, Bodemar G, Rydén BO, Sjölin C, Tejle K, Skogh T. Anti-lactoferrin antibodies and other types of ANCA in ulcerative colitis, primary sclerosing cholangitis, and Crohn's disease. Gut 1993; 34:56-62. [PMID: 8432453 PMCID: PMC1374101 DOI: 10.1136/gut.34.1.56] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Fifty two serum samples from patients with Crohn's disease, 24 from patients with ulcerative colitis, and 12 from patients with primary sclerosing cholangitis were analysed for the presence of anti-neutrophil cytoplasm antibodies (ANCA) of IgG and IgA class by means of enzyme linked immunosorbent assays using lactoferrin, myeloperoxidase, and antigen extracted from azurophil granules, 'alpha antigen' (that is, an antigen preparation containing proteinase 3) as substrates. A high frequency of positive tests for IgG anti-lactoferrin antibodies was found in sera from patients with ulcerative colitis (50%) and primary sclerosing cholangitis (50%). In Crohn's disease only 4 of 52 (8%) sera had anti-lactoferrin antibodies--in all four instances the sera belonged to patients with disease involving the colon. All patients with sclerosing cholangitis and positive tests for anti-lactoferrin had ulcerative colitis. Low levels of IgG antibodies against myeloperoxidase or alpha antigen were also found occasionally in sera from patients with ulcerative colitis and primary sclerosing cholangitis. IgA antibodies directed against lactoferrin and alpha antigen (but not myeloperoxidase) were seen in all three conditions.
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Affiliation(s)
- E Peen
- Department of Internal Medicine, Faculty of Health Sciences, University Hospital, Linköping, Sweden
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Gross WL, Schmitt WH, Csernok E. ANCA and associated diseases: immunodiagnostic and pathogenetic aspects. Clin Exp Immunol 1993; 91:1-12. [PMID: 8419069 PMCID: PMC1554662 DOI: 10.1111/j.1365-2249.1993.tb03345.x] [Citation(s) in RCA: 214] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
The past decade has seen an explosion of data on the new group of autoantibodies known collectively as ANCA (anti-neutrophil cytoplasmic antibodies). ANCA are specific for granule proteins of granulocytes and monocytes and induce distinct fluorescence patterns, e.g. the cytoplasmic (classic) cANCA and the perinuclear pANCA. cANCA is induced by antibodies directed against Proteinase 3 (PR3; PR3-ANCA) in about 90% of all ANCA-positive sera, and pANCA is induced by antibodies against myeloperoxidase (MPO; MPO-ANCA) in about 40%. A further staining pattern, which does not have a clear cut association with a distinct granule protein, is sometimes seen in chronic inflammatory bowel diseases. PR3-ANCA are serological markers for Wegener's granulomatosis (WG) and MPO-ANCA are associated with certain subtypes of primary vasculitides. Evidence exists that both the autoantigen and ANCA participate in the pathogenesis of at least the group of 'ANCA-associated vasculitides'.
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Affiliation(s)
- W L Gross
- Department of Clinical Rheumatology, Medical University of Lübeck, Bad Bramstedt, Germany
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36
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Launois P, N'Diaye M, Sarthou JL, Millan J, Bach MA. Anti-peripheral nerve antibodies in leprosy patients recognize an epitope shared by the M. leprae 65 kDa heat shock protein. J Autoimmun 1992; 5:745-57. [PMID: 1283301 DOI: 10.1016/0896-8411(92)90190-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Binding of leprosy sera to peripheral nerve from different species (mouse, guinea pig and rabbit) was evaluated by ELISA. A majority of sera, whatever the clinical form of leprosy, bind to these antigens. Absorption with Mycobacterium bovis BCG demonstrated that these antibodies recognize cross-reactive epitopes between peripheral nerve and mycobacteria. In immunoblot analysis, both leprosy patient sera and a monoclonal antibody directed at the 65 kDa heat shock protein of M. leprae were shown to react with a heat-shock 67-68 kDa sciatic nerve protein. Binding of the monoclonal antibody to this sciatic nerve antigen was prevented by incubation with lepromatous patient sera, showing that some peripheral nerve epitopes recognized by patient antibodies are shared by the 65 kDa heat shock protein of M. leprae.
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Affiliation(s)
- P Launois
- Immunologie Cellulaire, Institut Pasteur de Dakar, Senegal
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Esaguy N, Macedo PM, Castro AP, Aguas AP. Acquisition of autoimmunity genes by New Zealand mice is associated with natural resistance to infection by mycobacteria. J Autoimmun 1992; 5:641-51. [PMID: 1418300 DOI: 10.1016/0896-8411(92)90160-r] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
New Zealand (NZ) mouse strains comprise both autoimmune and non-autoimmune animals: NZ black (NZB) mice and the F1 hybrid (NZB/W) of NZB and NZ white (NZW) mice show spontaneous autoimmune disease by 6 months of age and die before the first year of age from renal disease, while NZW mice do not show autoimmune disorders. We investigated whether the autoimmunity-prone NZ animals (NZB and NZB/W) differ from the non-autoimmune NZW mice in susceptibility/resistance to mycobacterial infection. The three groups of NZ mice were infected by intraperitoneal inoculation of 10(8) colony forming units (cfu) of Mycobacterium avium. The M. avium infection was induced in 3-month-old mice (i.e., before NZB and NZB/W mice develop autoimmune disease) and studied for 4 months. Infected NZB and NZB/W mice showed evidence of renal disease at 2 and 4 months of infection (but not at 1 month). The non-autoimmune NZW mice were found to be susceptible to M. avium since they allowed massive proliferation (4-5 log growth) of the bacilli in liver and spleen. In contrast, both groups of autoimmunity-prone mice (NZB and NZB/W) were resistant to M. avium since their mycobacterial loads remained below the value of the initial inoculum. We conclude that in NZ mice the acquisition of autoimmunity genes is associated with expression of natural resistance to mycobacterial infection. This is consistent with the view that autoimmunity genes may have been evolutionarily selected because of their association with increased resistance of the host to infections by intracellular parasites.
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Affiliation(s)
- N Esaguy
- Center for Experimental Cytology (INIC), University of Porto, Portugal
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Mollenhauer J, Schulmeister A. The humoral immune response to heat shock proteins. EXPERIENTIA 1992; 48:644-9. [PMID: 1639172 DOI: 10.1007/bf02118310] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Humoral immune reactions to heat shock proteins (hsp) from microorganisms are one aspect of microbial infections in humans. The production of antibodies which are specific to epitopes present on procaryotic hsp leads also to the appearance of cross-reactive serum antibodies in the host organism that react with human hsp. This article discusses the consequences of such autoreactive antibodies for the host in context with the development of immune tolerance and autoimmune diseases, especially rheumatoid arthritis (RA), and in experimental animal models for arthritis such as adjuvant arthritis in rats. On the basis of epitope cross-reactivity between hsp and other host proteins, a hypothesis is presented for the development of autoimmune disease following the production of hsp-specific antibodies.
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Affiliation(s)
- J Mollenhauer
- Institute of Pharmacology and Toxicology, University of Erlangen-Nürnberg, Germany
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Denis M. Interleukin-6 is used as a growth factor by virulent Mycobacterium avium: presence of specific receptors. Cell Immunol 1992; 141:182-8. [PMID: 1555250 DOI: 10.1016/0008-8749(92)90137-e] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In this paper, we examined the contribution of the lymphokine interleukin-6 (IL-6) to the growth of four virulent strains of Mycobacterium avium and the nature of the binding moieties on the mycobacteria. First, we showed that human or mouse recombinant interleukin-6 are potent growth factors for four strains of virulent M. avium. This was shown to occur in tissue culture medium, which does not support maximal growth of M. avium. Bioactive IL-6 was required, inasmuch as heat-activating IL-6 or adding an antibody against IL-6 blocked this growth-enhancing ability. The rapid uptake of IL-6 by M. avium was indicated by the fact that the incubation of IL-6 with the four M. avium strains led to a rapid removal of the bioactivity from the culture medium and a rapid removal of radiolabeled IL-6. Scatchard analysis of receptor interaction showed that the M. avium strains had a single receptor species with a Kd of 50 nM and the number of receptor sites was approximately 15,000 bacterium. Blocking experiments showed that the binding of radiolabeled IL-6 was fully displaceable with cold IL-6, but not with other lymphokines. These data suggest that IL-6 may play an important role in the pathogenesis of M. avium infections, notably by promoting growth of M. avium, and that some virulent M. avium strains bind IL-6 in a specific manner.
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Affiliation(s)
- M Denis
- Unité de Recherche Pulmonaire, CHUS, Sherbrooke, Quebec, Canada
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Ehrenstein M, Isenberg D. Autoimmunity associated with infection: leprosy, acute rheumatic fever and Lyme disease. Curr Opin Immunol 1991; 3:930-5. [PMID: 1793538 DOI: 10.1016/s0952-7915(05)80016-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This review examines the links between autoimmunity and three common infectious diseases. These disorders are associated with a variety of clinical and serological autoimmune phenomena. In addition they might conceivably trigger autoimmune diseases themselves. Mechanisms that may be responsible for these links, including molecular mimicry, are explored.
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Affiliation(s)
- M Ehrenstein
- University College and Middlesex Hospital Medical School, London, UK
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41
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Finberg RW. Heat-shock proteins, and gamma alpha/delta T cells. SPRINGER SEMINARS IN IMMUNOPATHOLOGY 1991; 13:55-62. [PMID: 1837960 DOI: 10.1007/bf01225278] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- R W Finberg
- Laboratory of Infectious Diseases, Dana-Farber Cancer Institute, Boston, MA 02115
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