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Marangoni A, Accardo S, Aldini R, Guardigli M, Cavrini F, Sambri V, Montagnani M, Roda A, Cevenini R. Production of reactive oxygen species and expression of inducible nitric oxide synthase in rat isolated Kupffer cells stimulated by Leptospira interrogans and Borrelia burgdorferi. World J Gastroenterol 2006; 12:3077-81. [PMID: 16718791 PMCID: PMC4124385 DOI: 10.3748/wjg.v12.i19.3077] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the production of reactive oxygen species (ROS) and the expression of inducible nitric oxide synthase (iNOS) in rat isolated Kupffer cells (KCs) stimulated by Leptospira interrogans and Borrelia burgdorferi.
METHODS: Rat Kupffer cells were separated by perfusion of the liver with 0.05% collagenase, and purified by Percoll gradients. Purified Kupffer cells were tested in vitro with alive L.interogans and B. burgdorferi preparations. The production of ROS was determined by chemiluminescence, whereas iNOS protein expression was evaluated by Western blot assay using anti-iNOS antibodies.
RESULTS: B. burgdorferi and to a less extent L. interrogans induced ROS production with a peak 35 min after infection. The chemiluminescence signal progressively diminished and was undetectable by 180 min of incubation. Leptospirae and borreliae induced an increased iNOS expression in Kupffer cells that peaked at 6 hours and was still evident 22 h after infection.
CONCLUSION: Both genera of spirochetes induced ROS and iNOS production in rat Kupffer cells. Since the cause of liver damage both in leptospiral as well as in borrelial infections are still unknown, we suggest that leptospira and borrelia damage of the liver can be initially mediated by oxygen radicals, and is then maintained at least in part by nitric oxide.
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Affiliation(s)
- Antonella Marangoni
- Sezione di Microbiologia DMCSS, University of Bologna, Policlinico S. Orsola, Via Massarenti 9, 40138 Bologna, Italy
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Marangoni A, Sambri V, Storni E, D'Antuono A, Negosanti M, Cevenini R. Treponema pallidum surface immunofluorescence assay for serologic diagnosis of syphilis. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 2000; 7:417-21. [PMID: 10799455 PMCID: PMC95888 DOI: 10.1128/cdli.7.3.417-421.2000] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
A surface immunofluorescence assay (SIFA) using live spirochetes was analyzed and compared with Western blot (WB), fluorescent treponemal antibody absorption (FTA-ABS), microhemagglutination (MHA-TP), and Treponema pallidum immobilization (TPI) assays for detecting serum antibodies to T. pallidum in patients with syphilis, in disease controls, and in healthy subjects. SIFA and WB were 99% sensitive (99 of 100 positive specimens) and specific (140 of 140 negative specimens); FTA-ABS showed a sensitivity and a specificity of 90 and 89% (90 of 100 positive and 125 of 140 negative specimens), respectively. MHA-TP showed a sensitivity of 84% (84 of 100 positive specimens) and a specificity of 98.5% (138 of 140 negative specimens). Finally, TPI had a sensitivity of 52% (52 of 100 positive specimens) and a specificity of 100% (140 of 140 negative specimens). The T. pallidum SIFA was therefore highly specific, showing no equivocal reactivities with control sera, and sensitive. The results suggest the possible use of SIFA as a confirmatory test in the serologic diagnosis of syphilis.
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Affiliation(s)
- A Marangoni
- Sezione di Microbiologia, DMCSS, University of Bologna, St. Orsola Hospital, 40138 Bologna, Italy
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Marangoni A, Sambri V, Olmo A, D'Antuono A, Negosanti M, Cevenini R. IgG western blot as a confirmatory test in early syphilis. ZENTRALBLATT FUR BAKTERIOLOGIE : INTERNATIONAL JOURNAL OF MEDICAL MICROBIOLOGY 1999; 289:125-33. [PMID: 10360313 DOI: 10.1016/s0934-8840(99)80095-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
Sensitivity and specificity of IgG detection by Western blotting performed with a lysate of Treponema pallidum whole cells were compared with those of the most common assays used in the laboratory diagnosis of syphilis, i.e. fluorescent treponemal antibody absorption test (FTA-ABS) and treponemal haemagglutination assay (TPHA). Thirty-five serum samples obtained from twenty-one patients with a clinical diagnosis of early syphilis, based on the presence of typical chancre or skin or mucous membrane lesions, were studied. In addition, thirty blood samples from donors, ten sera positive for Borrelia burgdorferi and five positive for Leptospira interrogans were tested as controls. The clinical diagnosis was the reference method used to compare the performance of the serological tests. Western blotting performed with a sensitivity and specificity of 100%, whereas the corresponding sensitivity and specificity for FTA-ABS were 88.5% and 98%, respectively. The performance of TPHA showed a sensitivity of 86% and a specificity of 100%.
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Affiliation(s)
- A Marangoni
- Sezione di Microbiologia, Policlinico S. Orsola, University of Bologna, Italy
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Donati M, Moreno S, Storni E, Tucci A, Poli L, Mazzoni C, Varoli O, Sambri V, Farencena A, Cevenini R. Detection of serum antibodies to CagA and VacA and of serum neutralizing activity for vacuolating cytotoxin in patients with Helicobacter pylori-induced gastritis. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 1997; 4:478-82. [PMID: 9220168 PMCID: PMC170554 DOI: 10.1128/cdli.4.4.478-482.1997] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Thirty patients with dyspepsia, with histological diagnosis of gastritis, and with endoscopic diagnosis of peptic ulcer disease (PUD) (n = 13) or nonulcer dyspepsia (NUD) (n = 17) were admitted to the study. Helicobacter pylori vacuolating cytotoxin-producing strains (Tox+) were isolated from 14 (46.7%) patients, whereas non-cytotoxin-producing (Tox-) H. pylori strains were isolated from the remaining patients. Of 30 patients studied, 20 (66.7%) had serum cytotoxin neutralizing activity in vitro. Fourteen patients with Tox+ H. pylori strains showed serum cytotoxin neutralizing activity and serum immunoglobulin G (IgG) and IgA antibodies reactive with both 87-kDa H. pylori vacuolating cytotoxin (VacA) and 128-kDa cytotoxin-associated gene product (CagA) by immunoblotting using native enriched preparations of VacA and CagA proteins from H. pylori culture supernatants as the antigens. A 94-kDa antigen cross-reacting with the 87-kDa VacA protein could be demonstrated in culture supernatant with immune sera from humans and animals. All patients (n = 10) lacking serum neutralizing activity were also negative for IgG or IgA against VacA antigen, whereas 6 of the 10 patients showed IgG serum antibody responses against CagA antigen. The prevalence of antibodies to VacA and CagA antigens was significantly (P < 0.001) higher in patients with gastritis (20 and 26 patients for VacA and CagA, respectively, of 30 patients) than in H. pylori culture-negative controls (0 of 27 for both VacA and CagA) and in randomly selected blood donors (17 and 21 for VacA and CagA, respectively, of 120 subjects). All patients with PUD had antibodies to CagA, whereas 13 of 17 (76.5%) patients with NUD had anti-CagA antibodies. Serum IgG antibodies to VacA were present in 9 (69.2%) patients with PUD of 13 patients and in 11 (64.7%) patients with NUD of 17 patients. Anti-CagA antibodies seemed to correlate better with PUD than anti-VacA antibodies.
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Affiliation(s)
- M Donati
- Sezione di Microbiologia DMCSS, Policlinico S. Orsola, University of Bologna, Italy
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Moroni A, Pavan G, Donati M, Cevenini R. Differences in the envelope proteins of Chlamydia pneumoniae, Chlamydia trachomatis, and Chlamydia psittaci shown by two-dimensional gel electrophoresis. Arch Microbiol 1996; 165:164-8. [PMID: 8599533 DOI: 10.1007/bf01692857] [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] [Indexed: 01/31/2023]
Abstract
Analysis by two-dimensional gel electrophoresis of the N-laurylsarkosinate(Sarkosyl)-insoluble envelope complexes of L-[35]S-cysteine-labeled elementary bodies of Chlamydia pneumoniae strain IOL-207, Chlamydia trachomatis serovar LGV2, D, and F, and Chlamydia psittaci strain 6BC showed differences in the molecular charges of chlamydial outer membrane proteins. The apparent isoelectric point (pI) of the major outer membrane protein of C. pneumoniae strain IOL-207 was 6.4, whereas the pI of the major outer membrane protein of the C. trachomatis and C. psittaci strains differed little from one another, ranging from 5.3 to 5.5. The 60-kDa cysteine-rich protein of C. pneumoniae was the only 60-kDa chlamydial protein with a pI value (5.9) more acidic than that of the corresponding major outer membrane protein. As a general rule, the charges of both the 60-kDa and the low-molecular-mass (12-15 kDa) cysteine-rich proteins were widely variable, depending on the strain. However, in each individual strain, the variation of the charge of the 60-kDa protein had a compensatory change in the low-molecular-mass cysteine-rich protein.
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Affiliation(s)
- A Moroni
- Institute of Microbiology, University of Bologna, St. Orsola Hospital, Via Massarenti 9, I-40138 Bologna, Italy
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Immune Protection Against Chlamydia trachomatis in Females. Infect Dis Obstet Gynecol 1996; 4:163-70. [PMID: 18476089 PMCID: PMC2364487 DOI: 10.1155/s106474499600035x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/1996] [Accepted: 10/01/1996] [Indexed: 11/25/2022] Open
Abstract
Despite significant advances in our understanding of the biology and antigenic structure of
Chlamydia trachomatis, and the epidemiology and clinical spectrum of chlamydial disease, the magnitude of
morbidity from human chlamydial infections remains an important public health concern. Control
of chlamydial disease will likely depend on a multidisciplinary approach, including the development
of immunoprophylactic or immunotherapeutic strategies. Reasonable progress has been made in
understanding specific immune mechanisms that contribute to host immunity in experimental models
of chlamydial infection. However, studies of human immunity have not been so successful. This
is particularly evident in that studies to address the development and role of mucosal immune
responses to urogenital chlamydial infections have not been forthcoming. The following review is
a brief summary of our current knowledge of protective immunity to chlamydial urogenital infections
of females. It is not meant to be exhaustive, but instead to touch upon aspects of protective immunity
that have been described in both human and experimental animal models of chlamydial
infection.
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Sambri V, Marangoni A, Massaria F, Farencena A, La Placa M, Cevenini R. Functional activities of antibodies directed against surface lipoproteins of Borrelia hermsii. Microbiol Immunol 1995; 39:623-7. [PMID: 7494503 DOI: 10.1111/j.1348-0421.1995.tb02252.x] [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: 01/25/2023]
Abstract
Enriched preparations for mouse polyclonal immunoglobulin G (IgG) antibodies reactive with surface-exposed epitopes (Ab-SEE) of the 22-kDa and 24-kDa membrane lipoproteins of living Borrelia hermsii (HS 1 strain) cells were obtained by an antibody absorption technique using living spirochetes. In vitro, the antibody preparations both inhibited spirochetal growth and were borreliacidal in the presence of complement. The monovalent Fab antibody fragments, prepared from antibody-enriched preparations, did not inhibit the growth of the bacteria, whereas they killed the bacteria in the presence of complement. The two-dimension gel electrophoresis of B. hermsii cells showed that 3H-labeled fatty acids incorporated into the 22-kDa and 24-kDa lipoproteins were resolved into one and three compact spots, respectively. The spots were recognized by the Ab-SEE preparations reactive with the 22-kDa and 24-kDa proteins, by Western blotting.
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Affiliation(s)
- V Sambri
- Institute of Microbiology, St. Orsola Hospital, University of Bologna, Italy
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Cevenini R, Sambri V, Massaria F, Franchini R, D'Antuono A, Borda G, Negosanti M. Surface immunofluorescence assay for diagnosis of Lyme disease. J Clin Microbiol 1992; 30:2456-61. [PMID: 1401015 PMCID: PMC265523 DOI: 10.1128/jcm.30.9.2456-2461.1992] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
A surface immunofluorescence assay (SIFA) was analyzed and compared with a conventional indirect immunofluorescence assay (IFA) and whole-cell enzyme-linked immunosorbent assay (ELISA) for detecting immunoglobulin G (IgG) antibodies to Borrelia burgdorferi in sera from patients with Lyme disease. Fifty-five patients with syphilis and 33 patients with rheumatoid arthritis were used as disease controls. The sensitivity of the SIFA was low during the acute phase of Lyme disease (sera from seven of nine patients presenting with erythema chronicum migrans were negative during the first 2 months of illness); later, seroconversion was observed in all patients at various times during convalescence. Sera from five patients with complicated Lyme disease were strongly positive. SIFA was found to be highly specific, since sera from all patients with secondary or latent syphilis and patients with rheumatoid arthritis did not react in the test. Strong cross-reactivity occurred when these sera were tested in conventional IFA and ELISA; sera from 38 (69%) patients with syphilis were positive by IFA and sera from 51 (93%) patients were positive by ELISA, whereas 7 (21%) and 12 (36%) of the serum samples from patients with rheumatoid arthritis were positive by IFA and ELISA, respectively. Immunoblot analysis of SIFA-positive sera showed that the 31- and 34-kDa outer surface proteins (proteins A and B, respectively) of B. burgdorferi were the major reactive antigens involved in the test. The results support a role for SIFA in the investigation of complicated Lyme disease as well as in the differentiation of Lyme disease from other diseases associated with B. burgdorferi cross-reactive antibodies.
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Affiliation(s)
- R Cevenini
- Institute of Microbiology, Policlinico S. Orsola, University of Bologna, Italy
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Cevenini R, Sambri V, Massaria F, Placa M, Brocchi E, Simone F. Complement-mediated in vitro bactericidal activity of monoclonal antibodies reactive with outer-surface-protein OspB ofBorrelia burgdorferi. FEMS Microbiol Lett 1992. [DOI: 10.1111/j.1574-6968.1992.tb05142.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Cevenini R, Sambri V, Pileri S, Ratti G, La Placa M. Development of transplantable ascites tumours which continuously produce polyclonal antibodies in pristane primed BALB/c mice immunized with bacterial antigens and complete Freund's adjuvant. J Immunol Methods 1991; 140:111-8. [PMID: 2061607 DOI: 10.1016/0022-1759(91)90132-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Bacterial immunogens (whole cells of Borrelia burgdorferi, elementary bodies of Chlamydia trachomatis and purified proteins of 22 and 24 kDa of Borrelia hermsii) were emulsified with an excess of complete Freund's adjuvant and injected (i.p.) on days 0, 7, 14 and 21, into BALB/c mice treated with pristane on day 6. This procedure induced the development of antibody-producing ascites tumours which could be serially transplanted in pristane-conditioned mice. Ascites tumours continued to yield a consistent amount of specific polyclonal antibody after ten serial transplants. The method described appears to be particularly useful for the production of a large amount of antibody when only small amounts of immunogen are available.
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Affiliation(s)
- R Cevenini
- Institute of Microbiology, University of Bologna, Italy
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Cevenini R, Donati M, Brocchi E, Simone F, Placa M. Partial characterization of an 89-kDa highly immunoreactive protein fromChlamydia psittaciA/22 causing ovine abortion. FEMS Microbiol Lett 1991. [DOI: 10.1111/j.1574-6968.1991.tb04722.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Taylor-Robinson D, Thomas BJ. Laboratory techniques for the diagnosis of chlamydial infections. Genitourin Med 1991; 67:256-66. [PMID: 2071132 PMCID: PMC1194684 DOI: 10.1136/sti.67.3.256] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Yolk-sac inoculation of embryonated eggs was superseded 25 years ago by the use of cell cultures (often McCoy) for the isolation of Chlamydia trachomatis. Centrifugation of specimens onto the cell monolayers was shown to increase sensitivity, but little of late has further improved sensitivity which is at least ten-fold greater than that of eggs. However, culture is slow and labour intensive so that non-cultural techniques without these drawbacks have come to dominate. Direct fluorescent antibody (DFA) tests are rapid and have sensitivities that range from 70% to 100% for men and 68% to 100% for women, and specificities that range from 87% to 99% for men and 82% to 100% for women; if the tests are read by competent observers the values are at the top end of the ranges. The detection rate may be enhanced even further by relatively low-speed centrifugation of specimens before staining. Skilled reading is not a feature of enzyme immunoassays (EIAs) which according to the literature have sensitivities that range from 62% to 97% for men and 64% to 100% for women, and specificities that range from 92% to 100% for men and 89% to 100% for women. However, comparison against poor reference tests is responsible for most of the higher values and the clinician should not be misled into believing that EIAs have excellent sensitivity; the lower values in the ranges are closer to reality. Furthermore, EIAs that are being designed for use by general practitioners should be regarded with the greatest caution since lack of sensitivity means that chlamydia-positive patients will go undetected. The polymerase chain reaction (PCR) is not bedevilled by insensitivity but it is no more sensitive than the most sensitive cell culture or DFA tests. PCR is unsuitable for routine diagnosis but has a place as a research tool. For men, examination of "first-catch" urine samples by the best of the non-cultural procedures provides an acceptable non-invasive approach to diagnosis; for women, the value of examining urine may be less, but needs to be thoroughly tested. However, there is little doubt that a Cytobrush used to obtain cervical specimens holds no practical advantage over a swab. Serological tests are reliant on the provision of paired sera for making a diagnosis; high antibody titres in single sera may be suggestive of an aetiological association in deep-seated chlamydial infections (epididymitis, arthritis, salpingitis, etc), but unequivocal interpretation is unusual, particularly in an individual case, since the distinction between a current and past infection is problematical.
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Affiliation(s)
- D Taylor-Robinson
- Division of Sexually Transmitted Diseases, Clinical Research Centre, Middlesex, UK
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Miettinen A, Heinonen PK, Teisala K, Punnonen R, Paavonen J. Antigen specific serum antibody response to Chlamydia trachomatis in patients with acute pelvic inflammatory disease. J Clin Pathol 1990; 43:758-61. [PMID: 2212068 PMCID: PMC502756 DOI: 10.1136/jcp.43.9.758] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Sera from 35 patients with acute pelvic inflammatory disease (PID) with and without Chlamydia trachomatis confirmed by culture and sera from 19 control patients with neither evidence of pelvic infection nor C trachomatis infection were studied for the presence of serum IgG, IgA, and IgM antibodies to C trachomatis using enzyme immunoassay (EIA) and immunoblotting techniques. There was no correlation between the antibody concentrations in the EIA and the spread of chlamydial infection, as determined by cervical, endometrial, and laparoscopic sampling for chlamydia. The immunoblot analysis showed antibodies to the major outer membrane protein (MOMP) of C trachomatis elementary bodies in all patients who had had C trachomatis isolated. Reactivity was also frequently observed against the 68, 62, 60, 45, and 31 kilodalton antigens. About 20 antigenic polypeptides were identified. Differences in antibody prevalence to specific chlamydial antigens, however, were not related to the site of chlamydial isolation or serum antibody concentrations observed with the EIA. The results indicate that patients with PID with and without upper genital tract infection with C trachomatis cannot be differentiated by reactivity of sera to specific chlamydial polypeptide antigens. The determination of a specific serum IgA antibody response by EIA was the most effective single test to discriminate between patients with and without acute chlamydial infection.
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Affiliation(s)
- A Miettinen
- Department of Biomedical Sciences, University of Tampere, Finland
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Affiliation(s)
- D I Stott
- Department of Bacteriology and Immunology, University of Glasgow, Scotland
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Cevenini R, Donati M, La Placa M. Effects of penicillin on the synthesis of membrane proteins of Chlamydia trachomatis LGV2 serotype. FEMS Microbiol Lett 1988. [DOI: 10.1111/j.1574-6968.1988.tb03147.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Cevenini R, Donati M, Sambri V, Rumpianesi F, La Placa M. Reactivity of elementary and reticulate bodies ofChlamydia trachomatisLGV2 with monoclonal antibodies specific for the major outer membrane protein. FEMS Microbiol Lett 1987. [DOI: 10.1111/j.1574-6968.1987.tb02297.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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17
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Cevenini R, Rumpianesi F, Donati M, Moroni A, Sambri V, La Placa M. Class specific immunoglobulin response to individual polypeptides of Chlamydia trachomatis, elementary bodies, and reticulate bodies in patients with chlamydial infection. J Clin Pathol 1986; 39:1313-6. [PMID: 3805317 PMCID: PMC1140794 DOI: 10.1136/jcp.39.12.1313] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Sera from 10 women with Chlamydia trachomatis culture positive cervicitis and sera from six men with C trachomatis positive non-gonococcal urethritis were studied for the presence of IgG, IgM, and IgA antibodies to polypeptides of C trachomatis elementary bodies and reticulate bodies using immunoblotting techniques. All the sera with IgG, IgM, or IgA immunoglobulins specific to C trachomatis recognised the major outer membrane protein (MOMP) of elementary bodies. IgG antibodies also detected several other proteins, whereas IgM immunoglobulins recognised only MOMP and proteins of 60 kD, 62 kD, and 66 kD. The IgA reacted with MOMP and the 60 kD and 62 kD proteins in elementary bodies. Class specific antibody response against the proteins of reticulate bodies was similar to that observed for elementary body antigens--with one substantial difference: no reaction was observed in the 60 kD and 62 kD positions. This suggests that 60 kD and 62 kD proteins are deficient in reticulate bodies.
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