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Jash A, Howie HL, Hay AM, Luckey CJ, Hudson KE, Thomson PC, Ratcliffe SJ, Smolkin M, Zimring JC. Identification of multiple genetic loci associated with red blood cell alloimmunization in mice. Haematologica 2023; 108:905-908. [PMID: 36373252 PMCID: PMC9973466 DOI: 10.3324/haematol.2022.281767] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Indexed: 11/11/2022] Open
Affiliation(s)
- Arijita Jash
- University of Virginia School of Medicine, Charlottesville VA; Carter Immunology Center, University of Virginia
| | | | - Ariel M Hay
- University of Virginia School of Medicine, Charlottesville VA; Carter Immunology Center, University of Virginia
| | | | - Krystalyn E Hudson
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York
| | - Peter C Thomson
- Sydney School of Veterinary Science, University of Sydney, Sydney, NSW
| | - Sarah J Ratcliffe
- University of Virginia, Public Health Sciences, Division of Biostatistics
| | - Mark Smolkin
- University of Virginia, Public Health Sciences, Division of Biostatistics
| | - James C Zimring
- University of Virginia School of Medicine, Charlottesville VA; Carter Immunology Center, University of Virginia.
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Adjuvant effect of mesoporous silica SBA-15 on anti-diphtheria and anti-tetanus humoral immune response. Biologicals 2022; 80:18-26. [DOI: 10.1016/j.biologicals.2022.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 07/25/2022] [Accepted: 10/25/2022] [Indexed: 11/21/2022] Open
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Pedrini SCB, Acorci MJ, Pinto JGG, Silveira LVA, Oliveira SL. Immune Response to theRhodococcus equiInfection in High and Low Antibody-Producing Mice (Selection IV-A). Microbiol Immunol 2013; 49:915-23. [PMID: 16237269 DOI: 10.1111/j.1348-0421.2005.tb03683.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Rhodococcus equi is a gram-positive, facultative intracellular bacterium which infects macrophages and causes rhodococcal pneumonia and enteritis in foals. Recently, this agent has been recognized as an opportunistic pathogen for immunocompromised humans. Several murine experimental models have been used to study R. equi infection. High (H(IV-A)) and Low (L(IV-A)) antibody (Ab)-producers mice were obtained by bi-directional genetic selections for their ability to produce antibodies against sheep and human erythrocytes (Selection IV-A). These lines maintain their phenotypes of high and low responders also for other antigens than those of selection (multispecific effect). A higher macrophage activity in L(IV-A) mice has been described for several intracellular infectious agents, which could be responsible for their intense macrophage antigens (Ag)-handling and low Ab production. Due to these differences, L(IV-A) mice were found to exhibit a better performance to trigger an effective immune response towards intracellular pathogens. The objective of this work was to characterize the immune response of Selection IV-A against R. equi. H(IV-A) and L(IV-A) mice were infected with 2.0x10(6) CFU of ATCC 33701+R. equi by intravenous route. With regards to bacterial clearance and survival assays, L(IV-A) mice were more resistant than H(IV-A) mice to virulent R. equi. L(IV-A) mice presented a higher hydrogen peroxide (H2O2) and nitric oxide (NO) endogenous production by splenic macrophages than H(IV-A) mice. L(IV-A) expressed the most intense cellular response, available by the Delayed-Type Hypersensitivity (DTH) reaction, which activated macrophages and produced more H2O2 and NO. The three times higher specific antibodies titres in H(IV-A) indicated that Selection IV-A maintained the multispecific effect and the polygenic control of humoral and cellular responses also to R. equi.
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Affiliation(s)
- Sílvia C B Pedrini
- Department of Microbiology and Immunology of the Biosciences Institute, UNESP, São Paulo State University, Botucatu, Brazil
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Haanwinckel MCS, de Oliveira SL. Production of reactive oxygen (H2O2) and nitrogen (NO) intermediates and tnf-α in mice genetically selected for high (H) and low (L) antibody response and experimentally infected with Leptospira serovar pomona. Braz J Microbiol 2011; 42:729-39. [PMID: 24031688 PMCID: PMC3769827 DOI: 10.1590/s1517-838220110002000041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 05/24/2010] [Accepted: 01/13/2011] [Indexed: 11/30/2022] Open
Abstract
The aim of the present study was to evaluate the activity of macrophages, and the production of TNF-α and antibodies against experimental infection by Leptospira serovar Pomona in mice genetically selected for High (H) or Low (L) humoral immune response. To evaluate macrophagic activity, peritoneal and splenic lavages were performed for determination of oxygen (H2O2) and nitrogen (NO) intermediates. The production of the tumor necrosis factor (TNF-α) was investigated through bioassays in serum and homogenates of splenic and hepatic cells of control and infected animals, as was as specific antibodies production. The immune response against serovar Pomona in those lines, was characterized by high antibody production, especially in later periods of the infectious process, whereas values of bacterial recovery in culture medium were lower. The production of reactives oxygen and nitrogen intermediate, also helped to eliminate Leptospira Pomona in both lines; H2O2 production an important factor in HIV-A, as well as NO production in LIV-A, especially in later post-inoculation periods. The same was detected for TNF-α. Results suggest that such lines could be an important model to investigate the pathogenesis and the immune response of animals against the several Leptospira serovars.
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Affiliation(s)
- Maria Cristina Santos Haanwinckel
- Departamento de Microbiologia-Imunologia, Instituto de Biociências, Universidade Estadual Paulista , Botucatu, SP , Brasil; ; Departamento de Doenças Tropicais e Diagnóstico por Imagem, Faculdade de Medicina, Universidade Estadual Paulista , Botucatu, SP , Brasil
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Raadsma HW, Attard GA, Nicholas FW, Egerton JR. Disease resistance in Merino sheep. V. Genetic heterogeneity in response to vaccination with Dichelobacter nodosus and clostridial antigens. J Anim Breed Genet 2011. [DOI: 10.1111/j.1439-0388.1996.tb00604.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Haanwinckel MCS, Cavalheiro JS, Oliveira SLD. Identificação da Leptospira interrogans sorovar pomona em camundongos geneticamente selecionados, para a alta e baixa produção de anticorpos, através da técnica de imunoperoxidase em tecido renal e isolamento bacteriano em meio de Fletcher. Rev Soc Bras Med Trop 2007; 40:648-52. [DOI: 10.1590/s0037-86822007000600010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2007] [Accepted: 10/16/2007] [Indexed: 11/22/2022] Open
Abstract
O presente trabalho teve por objetivo identificar a presença da Leptospira interrogans sorovar pomona em camundongos geneticamente selecionados para a alta e baixa resposta a anticorpos. Todos os animais foram submetidos ao isolamento bacteriano, imunohistoquímica (imunoperoxidase) em cortes de tecido renal e coloração através da hematoxilina-eosina. A técnica de imunoperoxidase apresentou-se pouco mais sensível em relação ao cultivo, entretanto, ambas foram bons parâmetros de identificação do agente. Presença de lesões renais mais intensas ocorreram em períodos em que houve maior número de bactérias isoladas em meio de cultivo. Camundongos da linhagem HIV-A conseguiram eliminar as leptospiras com maior eficiência e rapidez em relação as linhagem LIV-A, entretanto o estudo demonstrou que ambas linhagens da seleção IV-A foram eficientes em controlar o processo infeccioso.
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Pinto JGG, Martins LA, Cavalheiro JS, Acorsi MJ, Pedrini SCB, Soares AMVC, Oliveira SL. Cytokine production in lungs and adrenal glands of high and low antibody producing mice infected with Paracoccidioides brasiliensis. Med Mycol 2006; 44:505-14. [PMID: 16966167 DOI: 10.1080/13693780600760781] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Mice genetically selected for high (H) and low (L) antibody production (HIV-A and LIV-A) were used in an experimental model of paracoccidioidomycosis. In a previous work, it was observed that male HIV-A animals were more susceptible to the infection due to adrenal gland damage. Male HIV-A and LIV-A animals were intravenously inoculated with Paracoccidioides brasiliensis (strain 18) and sacrificed 2, 4, 6, 8 and 10 weeks after inoculation. At each time interval, lungs and adrenals were removed to estimate recoverability of the fungus, as well as to determine Th1 (IFN-gamma, TNF-alpha) and Th2 (IL-4 and IL-10) cytokine profiles. While viable fungi recoverability from the lungs of HIV-A mice was higher after 4 and 8 weeks, there was less fungal recovery from the adrenals of LIV-A animals after the 2nd week, with total fungal elimination after the 8th week. With regard to Th2 cytokines, there was an inhibition in IL-4 production in the organs from infected animals, the extent of which varied according to the organ and the time period after initiation of infection. IL-10 production was found to be lower in both organs. Determination of Th1 cytokines revealed that IFN-gamma production increased in both organs, mainly in the adrenal of LIV-A after 8 and 10 weeks, when these animals showed a total fungal elimination. A significant difference was observed between HIV-A and LIV-A concerning TNF-alpha production in both organs and at all recovery times, in that LIV-A produced a higher level of this cytokine, mainly in the adrenal. These results may explain the high susceptibility of HIV-A to P. brasiliensis infection, is due, at least in part, to adrenal involvement. The higher production of Th1 cytokines by LIV-A in comparison to HIV-A mice may account for LIV-A resistance to P. brasiliensis infection. Our data reveal the importance of this experimental model in the study of the adrenal involvement in paracoccidioidomycosis, since this gland may be highly compromised in the patients, leading to the development of Addison's Disease.
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Affiliation(s)
- J G G Pinto
- Department of Microbiology and Immunology, Biosciences InstituteUNESP-São Paulo State University, Botucatu, State of São Paulo, Brazil
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Barros MT, Acencio MMP, Garcia MLB, Macedo Soares MF, Ibañez OM, Martins MA, Ribeiro OG, Kalil J, Perini A. BCG modulation of anaphylactic antibody response, airway inflammation and lung hyperreactivity in genetically selected mouse strains (Selection IV-A). Life Sci 2005; 77:1480-92. [PMID: 15953620 DOI: 10.1016/j.lfs.2005.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2004] [Accepted: 04/11/2005] [Indexed: 11/30/2022]
Abstract
The effect of Bacillus Calmette-Guérin (BCG) treatment in allergic pulmonary reaction was studied in mice genetically selected accordingly to a High (H-IVA) or Low (L-IVA) antibody responsiveness. Mice were immunized with ovalbumin (OVA) or OVA plus BCG. Two days after nasal antigenic challenge, seric IgE and IgG1 anti-OVA, eosinophils in pulmonary tissue, inflammatory cells in bronchoalveolar lavage and the compliance and conductance of respiratory system were evaluated. H-IVA mice were found more susceptible than L-IVA, and BCG was able to inhibit simultaneously the production of IgE, the bronchopulmonary inflammation and bronchial hyperresponsiveness in these genetically selected mice.
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Affiliation(s)
- Myrthes Toledo Barros
- Division of Clinical Immunology and Allergy, Heart Institute (InCor), Division of General Internal Medicine, Department of Medicine, University São Paulo, Av. Dr. Arnaldo, 455, Cerqueira César, 01246-903, São Paulo, Brazil.
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Vassão RC, Consales CA, Sant'Anna OA, Pereira CA. Antibody responsiveness during immunization and challenge of genetically modified antibody responder mice with murine hepatitis virus 3. Immunobiology 2003; 207:275-83. [PMID: 12952350 PMCID: PMC7134454 DOI: 10.1078/0171-2985-00239] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The aim of this study was to evaluate some immunological patterns involved in natural and acquired resistance against MHV3 using the original model of genetically modified lines of mice selected for high (HIII) and low (LIII) antibody responsiveness. As previously shown, a lower pre-existing anti-MHV antibody level was found in susceptible HIII mice as compared to resistant LIII mice. Mortality rates of the F1 (H x L) hybrids and F2 and backcross segregants reflected co-dominance of both characters and the survivors had higher preexisting anti-MHV antibody titers. The present data show that both lines had the potential to synthesize antibodies and that the resistance acquired by the susceptible HIII mice paralleled the antibody synthesis. Nevertheless, higher antibody titers were necessary to confer resistance in HIII mice than in LIII ones. When compared to uvMHV3, a single immunization with a related infectious MHV strain induced a higher antibody synthesis and led the HIII mice to resist the MHV3 challenge. A direct correlation between the antibody level and resistance to infection was always observed in HIII mice. Although mounting a Th2 response as indicated by IgG1 responses, they were also able to readily synthesize large amounts of IgG2a antibodies after immunization or during infection, reflecting a Th1 response. The transfer of anti-MHV antibodies to susceptible HIII mice was capable of conferring resistance to MHV3, providing the antibodies were present before virus infection and in large amounts. The resistance and the survival time of these animals increased with the level of antibody administered. If these direct and clear data suggest that HIII mice can acquire resistance through antibodies, the basis of the resistance of the resistant LIII mice may rely on mechanisms less dependent on antibodies.
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Affiliation(s)
- Ruth C Vassão
- Instituto Butantan, Laboratório de Imunologia Viral, São Paulo, SP, Brazil
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Visscher AH, Janss LLG, Niewold TA, de Greef KH. Disease incidence and immunological traits for the selection of healthy pigs. A review. Vet Q 2002; 24:29-34. [PMID: 11924559 DOI: 10.1080/01652176.2002.9695121] [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: 10/15/2022] Open
Abstract
Disease is a major issue in animal production systems and society demands that the use of medicines and vaccines be reduced. This review describes the breeding approaches that could be used to improve disease resistance and focuses especially on their application to pigs. Disease reduction by genetic means has certain advantages through cumulative and permanent effects, and direct and indirect selection methods are available. Direct selection for disease incidence requires, besides a unique pig identification and disease registration system, challenge routines that are inconvenient in intensive pig production. Indirect selection for the expression of immune capacity may be an alternative but requires detailed knowledge of the different components of the immune system. There is ample opportunity for genetic improvement of the immune capacity because immune traits show substantial genetic variation between pigs. We therefore conclude that indirect selection via immune traits is very interesting, also for practical implementation, and that there is an urgent need for knowledge, within lines, about the genetic relationships between immune capacity traits and resistance to specific diseases or to disease incidence in general. Furthermore, knowledge about the relationship between immune system traits and production traits is needed as well as knowledge about the effect of selection on the epidemiology of disease at a farm/population level and on the host-pathogen interaction and coevolution.
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Affiliation(s)
- A H Visscher
- Institute for Animal Science and Health (ID-Lelystad), The Netherlands
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Soares AM, Rezkallah-Iwasso MT, Oliveira SL, Peraçoli MT, Montenegro MR, Musatti CC. Experimental paracoccidioidomycosis in high and low antibody responder mice of Selection IV-A. Med Mycol 2000; 38:309-15. [PMID: 10975699 DOI: 10.1080/mmy.38.4.309.315] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
High (H) and low (L) responder mice were selected for their ability to produce antibodies against sheep and human erythrocytes (Selection IV-A). In this selection, the difference in antibody responsiveness between H and L lines (HIV-A and LIV-A mice, respectively) was shown to depend mainly on macrophage function. The more rapid catabolism of antigens by macrophages in L mice has been suggested as the main cause of the low antibody production. Due to this high macrophage activity, L animals have been described as more resistant than H animals to intracellular pathogens. These animals were utilized as an experimental model of paracoccidioidomycosis. HIV-A and LIV-A mice were infected with Paracoccidioides brasiliensis by the intravenous route. As expected, H mice were more susceptible to P. brasiliensis with a shorter survival time and higher levels of specific antibodies when compared to L mice. Contrasting with the survival time, the lungs, spleen and liver from H mice showed typical nodular granulomas containing epithelioid and giant cells and few fungi. On the other hand, in LIV-A mice, the lesions of these organs were characterized by looser granulomas with irregular borders and the presence of a large number of fungi. However, the adrenal gland showed different lesion patterns. In H mice these lesions were extensive and characterized by loose granulomas with numerous fungi, while in LIV-A mice the lesions were small and limited to the cortex. Moreover the HIV-A mice presented higher levels of serum corticosterone when compared to LIV-A ones. The higher susceptibility of H mice could be attributed to the extensive lesions of the adrenal glands. These results suggest the use of the H line from the IV-A Selection as an experimental model for further studies of adrenal involvement in paracoccidioidomycosis.
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Affiliation(s)
- A M Soares
- Department of Microbiology and Immunology, Biosciences Institute, UNESP, SP, Brazil.
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Raadsma HW, McEwan JC, Stear MJ, Crawford AM. Genetic characterisation of protective vaccine responses in sheep using multi-valent Dichelobacter nodosus vaccines. Vet Immunol Immunopathol 1999; 72:219-29. [PMID: 10614512 DOI: 10.1016/s0165-2427(99)00135-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Protective vaccine responses to nine distinct serogroups of Dichelobacter nodosus (serogroups A-I) can be readily measured by serogroup-specific K-agglutinating antibody titres. On the basis of a large quantitative genetic experiment (1200 progeny from 129 sire groups), it was shown that variation in antibody responses following vaccination with a multi-valent pilus antigen D. nodosus vaccine (serogroups A-I) is, in part, under genetic control and thus heritable. Based on the genetic relationships between antibody responses to all nine antigens, results suggested that both genes for a broad-based and genes for serogroup-specific response contributed to genetic variation in vaccine response. Furthermore, preliminary data in 389 progeny showed that polymorphism within the ovine major histocompatibility (MHC) based on serological classification accounted for a significant proportion of the variation in vaccine responses. In subsequent experimentation, we examined the importance of genetic polymorphism within the ovine MHC, and the possibility of genes outside the MHC for their involvement in antigen-specific and broad-based vaccine response. Within two large half sib families(131, and 143 progeny), four MHC haplotypes were investigated and found to be associated with differential antibody responses to six out of eight distinct vaccine-antigens presented to the host in a multi-valent vaccine. The model used here shows how well characterised immunogens, quantitative genetic experimentation, and molecular gene mapping tools can be used to unravel genetic differences in host responses to commercial vaccines.
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Affiliation(s)
- H W Raadsma
- Department of Veterinary Clinical Science, University of Sydney, Camden, NSW, Australia
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Fechio CJ, Soares AM, de Oliveira SL, Sartori A. Experimental visceral leishmaniasis in high and low antibody-producer mice (selection IV-A). Rev Soc Bras Med Trop 1999; 32:229-34. [PMID: 10380560 DOI: 10.1590/s0037-86821999000300002] [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: 11/22/2022] Open
Abstract
Leishmaniasis is a typical parasite infection whose protective immunity depends on macrophage activation. Susceptibility to Leishmania donovani infection was compared in H (high antibody responder) and L (low antibody responder) mice from selection IV-A. H mice infected intravenously with 10(7) amastigotes of L. donovani were more susceptible to infection than their L counterparts. This higher susceptibility was characterized by a higher splenic and hepatic parasite burden. An increased splenic index was observed in both lines after sixty days of infection. This splenomegaly was caused, at least partially, by an increase in the number of splenic cells as determined by direct counts of cells from spleen. The results show that selection IV-A is susceptible to visceral leishmaniasis, with the H line being more susceptible than the L line.
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Affiliation(s)
- C J Fechio
- Departamento de Microbiologia e Imunologia, Universidade Estadual Paulista (UNESP), Botucatu
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da Silva AC, de Souza KW, Machado RC, da Silva MF, Sant'Anna OA. Genetics of immunological tolerance: I. Bidirectional selective breeding of mice for oral tolerance. RESEARCH IN IMMUNOLOGY 1998; 149:151-61. [PMID: 9628396 DOI: 10.1016/s0923-2494(98)80298-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The polygenic nature of oral tolerance regulation was elucidated by the method of bidirectional selective breeding of mouse strains for tolerance susceptibility (TS) and resistance (TR) starting from a genetically heterogeneous population achieved by the equilibrated intercrossing of eight inbred mouse strains (A/J, DBA/2J, P/J, SWR/J, SJL/J, CBA/J, BALB/cJ and C57BL/6J). Seven days after intragastric administration of 5 mg OVA or BSA, mice were intraperitoneally immunized with 100 microg of the corresponding antigen. The individual antibody titres were measured by haemagglutination. The phenotypes at the highest and lowest extremes were selected for assortative mating, avoiding consanguinity. The second litter of each mating couple was intraperitoneally immunized only to evaluate the immunocompetence of the corresponding generation and to ascertain the non-selection of non-responder mice. A normal distribution of agglutinin titres ranging from 4 to 14 log2 was observed in the F0 population. In the F12 generation, TR and TS strains showed highly significant differences for agglutinin titres (TR=15.06+/-1.80 and TS=8.35+/-2.44), and IgG responses by ELISA. Up to the F12 generation, the mean realized heritability was 0.14+/-0.02. The response to the selection was 0.43 log2 and the selection differential 3.10 log2/generation. A provisional estimation indicated that oral tolerance may be influenced by eight or nine independent loci.
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Affiliation(s)
- A C da Silva
- Departamento de Biologia Celular e Genética, Instituto de Biologia, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
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De Franco M, Massa S, Vassão RC, Siqueira M, Sant'Anna OA. Polygenic control of antibody production and correlation with vaccine induced resistance to rabies virus in high and low antibody responder mice. Arch Virol 1996; 141:1397-406. [PMID: 8856022 DOI: 10.1007/bf01718243] [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
The amplification of "high" (H) and "low" (L) multispecific antibody responses achieved respectively by H and L lines of selection GP represents a valuable tool in the genetic study of host-infection interactions. These lines were obtained by bidirectional selective breeding for high (HGP) or low (LGP) antibody production to natural complex antigens. HGP and LGP parental lines and reciprocal F1 hybrids, as well as their F2 segregants and backcrosses were submitted to immunization and challenge with rabies virus CVS strain. Acquired resistance was 1000-fold higher in HGP than LGP mice, with a dominance effect to low antibody production observed in F1 hybrids. An association between high antibody response and acquired resistance (P < 0.001) in F2 segregant mice was noticed. The genetic study was performed in these several populations, with a single dose of 104.5-fold LD50 CVS. We could demonstrate 3 independent loci regulating the anti-rabies antibody production, that are distinct, at least in part, from the 10 genes controlling the antigen selection response (sheep erythrocytes) of selection GP.
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Affiliation(s)
- M De Franco
- Laboratório de Imunogenética, Instituto Butantan, São Paulo, Brazil
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Cabrera WH, Siqueira M, Takahashi NS, Ribeiro OG, Araujo LM, Mouton D, Ibanez OM. Specific and non-specific T-cell activation in high and low antibody-producing mice (selection IV-A). Scand J Immunol 1995; 41:293-7. [PMID: 7871390 DOI: 10.1111/j.1365-3083.1995.tb03567.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]
Abstract
The T-cell regulatory function has been evaluated in lines of mice genetically selected according to the High (H) and Low (L) antibody responsiveness to heterologous erythrocytes. The inhibition of antibody production following CD4+ subset depletion was stronger in L than in H mice. The dose of CD4-specific monoclonal antibody (MoAb) needed for a 50% inhibition of the anti-sheep erythrocyte antibody response was much lower in L mice, even when their responsiveness was improved by repeated antigen injections or by co-injection of lipopolysaccharide as an adjuvant. Lymph-node cells from L mice responded normally or even better than those from H mice to in vitro non-specific triggering via lectins, exogenous superantigens or CD3-specific MoAb. In contrast, the antigen-specific responses of the lymph-node cells from protein-primed mice were consistently lower in the Low responder mice. Altogether the results suggest that a defective stimulation of T helper lymphocytes by the antigen contributes to the weak antibody response of L mice.
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Affiliation(s)
- W H Cabrera
- Laboratorio de Imunogenetica, Instituto Butantan, Sao Paulo
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Vassão RC, Mello IG, Pereira CA. Role of macrophages, interferon gamma and procoagulant activity in the resistance of genetic heterogeneous mouse populations to mouse hepatitis virus infection. Arch Virol 1994; 137:277-88. [PMID: 7944950 PMCID: PMC7087281 DOI: 10.1007/bf01309475] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Genetic heterogeneous mouse populations selected for high (HIII) and low (LIII) antibody response were used to study some aspects of mouse hepatitis virus 3 (MHV3) infection, such as the resistance pattern, virus replication in the liver and peritoneal exudate or in cultured peritoneal macrophages, the interferon (IFN) synthesis in the serum and peritoneal exudate and the procoagulant activity (PCA) of the peritoneal exudate (PEC) and spleen cells (SC). The HIII mice, when compared to their LIII mice counterparts, were susceptible to MHV3 infection showing higher virus titres in the liver and peritoneal exudate, comparable IFN alpha/beta or IFN gamma titres in the peritoneal exudate or in the serum, and higher levels of PCA of PEC and SC. A higher virus titre was detected in the supernatants of HIII mouse macrophages infected with MHV3. The activation of HIII mouse macrophages with LPS, IFN alpha/beta or IFN gamma, in contrast to that of LIII mouse macrophages, did not induce an antiviral effect with partial restriction of the MHV3 replication. The LPS antiviral activity was shown to be partially exerted by IFN alpha/beta synthesis. The IFN gamma was shown to be more effective in inducing an antiviral state in LIII macrophages, when compared to IFN alpha/beta. The data obtained are consistent with the notion that the resistance mechanisms to the MHV3 infection involve the PCA and the sensitivity of macrophages to IFN.
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Affiliation(s)
- R C Vassão
- Laboratorio de Imunologia Viral, Instituto Butantan, Sao Paulo, Brasil
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Sant'Anna OA, Massa S, Mouton D, Bouthillier Y, Mevel JC, Ibanez OM, Vassao R, de Franco M, Bellinati R, Siqueira M. Salmonella typhimurium infection in high and low antibody responder mice: inverse correlation between antibody responsiveness and resistance to infection. FEMS MICROBIOLOGY IMMUNOLOGY 1989; 1:465-71. [PMID: 2697320 DOI: 10.1111/j.1574-6968.1989.tb02437.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Susceptibility to Salmonella typhimurium infection was compared in H (high Ab responder) and L (low Ab responder) mice obtained by several selective breeding experiments (Selections I, II, III, IV and IV A). H mice were always much more susceptible to infection than their L mice counterparts within a continuous LD 50 variation range. In three of the selections (I, II and IV A) the low responsiveness character is known to result mainly from rapid Ag degradation in L mice macrophages. It was hypothesized that resistance to multiplication of intracellular pathogens could be related to an increased catabolic activity towards Ag. This was actually demonstrated, in F2 segregant hybrids of selection IV A, by the significant inverse correlation between capacity for Ab production and resistance to infection.
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Affiliation(s)
- O A Sant'Anna
- Seçao de Immunologia, Instituto Biologico, Sao Paulo, Brazil
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