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Matias CAR, Pereira IA, Rodrigues DP, Siciliano S. Staphylococcus spp. isolated from wild birds apprehended in the local illegal trade in Rio de Janeiro, Brazil, and relevance in public health. Lett Appl Microbiol 2018; 67:292-298. [PMID: 29924392 DOI: 10.1111/lam.13035] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 06/15/2018] [Accepted: 06/16/2018] [Indexed: 11/28/2022]
Abstract
This work aimed to investigate the prevalence of Staphylococcus in wild birds seized in illegal trade and their antimicrobial resistance patterns. Cloacal samples were obtained from 109 wild birds apprehended in the street markets in Rio de Janeiro, Brazil. Staphylococcus spp. were phenotypically and genotypically identified, and resistance profile was evaluated according to Clinical and Laboratory Standards Institute guidelines and by polymerase chain reaction of mecA and blaZ genes. Staphylococcus was detected in 45·9% (50/109) of the cloacal swab samples, and 39 (78·0%) isolates were resistant to one or more of the nine antimicrobials tested and were also positive to mecA (12/39) or blaZ genes (14/39). High percentage of resistance was detected to ampicillin, oxacillin, cefoxitin, clindamycin and tetracycline, with the absence of resistance to vancomycin. Wild birds captured and submitted to captive stress conditions of illegal trade market of Brazil may have an important role as reservoirs of Staphylococcus spp. and its antimicrobial resistance mechanisms. The significance of this study is revealed by the zoonotic and pathogenic potential of staphylococci and that impact to public health and requires monitoring polices of wild birds health in tropical areas. SIGNIFICANCE AND IMPACT OF THE STUDY The isolation of Staphylococcus species that are not commonly isolated from wild bird faeces, the relatively high proportion of strains showing degrees of resistance to β-lactamics, lincosamides and tetracycline, and also the presence of mecA and blaZ genes that has been associated with multidrug phenotype reveal its public health relevance and zoonotic potential. Consequently, this represents an important route to transmission of this pathogen and its antimicrobial resistance mechanisms throughout national and international frontiers fostered by the illegal trade of wild animals and close contact with humans.
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Affiliation(s)
- C A R Matias
- Department of Epidemiology and Public Health, Veterinary Institute, Federal Rural University of Rio de Janeiro, Seropédica, Brazil.,Post-Graduation Program in Public Health and Environment, National School of Public Health Sérgio Arouca, Rio de Janeiro, Brazil
| | - I A Pereira
- Laboratory of Microbiology, Federal University of Rio de Janeiro, Macaé, Brazil
| | - D P Rodrigues
- National Reference Laboratory of Enterobacteria Infections, Oswaldo Cruz Institute, Rio de Janeiro, Brazil
| | - S Siciliano
- National Reference Laboratory of Enterobacteria Infections, Oswaldo Cruz Institute, Rio de Janeiro, Brazil
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Drehmer MN, Andrade D, Pereira IA, Marrero AR, Muniz YCN, de Souza IR, Löfgren SE. Estrogen receptor alpha gene (ESR1) polymorphism can contribute to clinical findings in systemic lupus erythematosus patients. Lupus 2016; 26:294-298. [DOI: 10.1177/0961203316668041] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background Estrogens have a modulatory effect on several immune responses, many of which are correlated to autoimmune diseases. Estrogens act through binding to their receptors, and an overexpression of these receptors has been identified in patients with different autoimmune diseases. Here we analyzed the association of a putative functional genetic variant in the main estrogen receptor (ERα) gene ( ESR1), and the susceptibility to clinical findings and severity of SLE. Methods A total of 426 individuals (266 healthy controls and 160 SLE patients) were genotyped for the polymorphism rs2234693 in the ESR1 gene. Allele and genotype frequencies were calculated and analyzed between cases and controls using Unphased software. Results The SNP rs2234693 was not associated with SLE per se but the minor allele rs2234693-C was correlated with the presence of nephritis and discoid skin rash. On the other hand, the rs2234693-CC genotype was correlated with the absence of arthritis as well as anti-ANA and anti-RNP autoantibodies. The comprehensive clinical analysis of these patients revealed a more severe status of the disease, characterized by a younger age of onset and higher number of organs involved when compared to European populations. Conclusions Minor allele rs2234693-C was associated with renal and cutaneous involvement, as well as the absence of arthritis, anti-ANA and anti-RNP autoantibodies.
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Affiliation(s)
- M N Drehmer
- Federal University of Santa Catarina, Department of Cell Biology, Embryology and Genetics, Florianopolis, Brazil
| | - D Andrade
- Federal University of Santa Catarina, Department of Cell Biology, Embryology and Genetics, Florianopolis, Brazil
| | - I A Pereira
- University Hospital, Rheumatology division, Federal University of Santa Catarina, Florianopolis, Brazil
| | - A R Marrero
- Federal University of Santa Catarina, Department of Cell Biology, Embryology and Genetics, Florianopolis, Brazil
| | - Y C N Muniz
- Federal University of Santa Catarina, Department of Cell Biology, Embryology and Genetics, Florianopolis, Brazil
| | - I R de Souza
- Federal University of Santa Catarina, Department of Cell Biology, Embryology and Genetics, Florianopolis, Brazil
| | - S E Löfgren
- Federal University of Santa Catarina, Department of Cell Biology, Embryology and Genetics, Florianopolis, Brazil
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Fafá B, Valim V, Peçanha P, Laurindo I, Ranzolin A, Hayata A, Duarte Â, Brenol C, Carvalho H, Pinheiro GC, Silveira I, Pereira IA, Costa I, Macieira J, Miranda JR, Moraes JC, Barbosa LSG, Bértolo M, Sauma M, Silva M, Freire M, Scheinberg M, Júnior PL, Toledo R, Ranza R, Oliveira S, Fernandes V, Bianchi W, Titton D, Brasil B. AB0524 Biological agents survival comparisons among different rheumatic disease - brazilian register of biological agents in rheumatic diseases - biobadabrasil. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.2846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Skare TL, Leite N, Bortoluzzo AB, Gonçalves CR, da Silva JAB, Ximenes AC, Bértolo MB, Ribeiro SLE, Keiserman M, Menin R, Carneiro S, Azevedo VF, Vieira WP, Albuquerque EDN, Bianchi WA, Bonfiglioli R, Campanholo C, Carvalho HMS, Costa IP, Duarte AP, Gavi MBO, Kohem CL, Lima SAL, Meirelles ES, Pereira IA, Pinheiro MM, Polito E, Resende GG, Rocha FAC, Santiago MB, Sauma MDFLC, Sampaio-Barros PD. Effect of age at disease onset in the clinical profile of spondyloarthritis: a study of 1424 Brazilian patients. Clin Exp Rheumatol 2012; 30:351-357. [PMID: 22510473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Accepted: 10/25/2011] [Indexed: 05/31/2023]
Abstract
OBJECTIVES To analyse demographic and clinical variables in patients with disease onset before and after 40, 45 and 50 years in a large series of Brazilian SpA patients. METHODS A common protocol of investigation was prospectively applied to 1424 SpA patients in 29 centres distributed through the main geographical regions in Brazil. The mean age at disease onset was 28.56 ± 12.34 years, with 259 patients (18.2%) referring disease onset after 40 years, 151 (10.6%) after 45 years and 81 (5.8%) after 50 years. Clinical and demographic variables and disease indices (BASDAI, BASFI, BASRI, MASES, ASQoL) were investigated. Ankylosing spondylitis was the most frequent disease (66.3%), followed by psoriatic arthritis (18%), undifferentiated SpA (6.7%), reactive arthritis (5.5%), and enteropathic arthritis (3.5%). RESULTS Comparing the groups according to age of disease onset, those patients with later onset presented statistical association with female gender, peripheral arthritis, dactylitis, nail involvement and psoriasis, as well as negative statistical association with inflammatory low back pain, alternating buttock pain, radiographic sacroiliitis, hip involvement, positive familial history, HLA-B27 and uveitis. BASDAI, BASFI and quality of life, as well as physicians and patient's global assessment, were similar in all the groups. Radiographic indices showed worse results in the younger age groups. CONCLUSIONS There are two different clinical patterns in SpA defined by age at disease onset: one with predominance of axial symptoms in the group with disease onset ≤ 40 years and another favouring the peripheral manifestations in those with later disease onset.
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Affiliation(s)
- T L Skare
- Hospital Evangélico de Curitiba, Brazil.
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Werner de Castro GR, Neves FS, de Magalhães Souza Fialho SC, Pereira IA, Ribeiro G, Zimmermann AF. Flare-up of hand osteoarthritis caused by zoledronic acid infusion. Osteoporos Int 2010; 21:1617-9. [PMID: 19936866 DOI: 10.1007/s00198-009-1123-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2009] [Accepted: 10/14/2009] [Indexed: 10/20/2022]
Abstract
Zoledronic acid is effective for osteoporosis at a single annual intravenous dose. It usually causes few adverse effects; the most common are related to acute phase reactions. We reported the case of a 64-year-old woman who presented flare-up of hand osteoarthritis after zoledronic acid infusions. Despite the fact that arthralgia is a common side effect of intravenous bisphosphonates, development of inflammatory signs in osteoarthritic joints is a rare event. We hypothesized that this side effect is caused by a release of cytokines secondary to activation of gamma-delta T lymphocytes.
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Gossec L, Bijlsma JWJ, Bombardier C, Canhao H, Devlin J, Edwards CJ, Hamuryudan V, Kvien TK, Leeb BF, Martin-Mola EM, Mielants H, Muller-Ladner U, Ostergaard M, Pereira IA, Ramos-Remus C, Zochling J, Dougados M. Dissemination and evaluation of the 3E initiative recommendations for use of methotrexate in rheumatic disorders: results of a study among 2233 rheumatologists. Ann Rheum Dis 2010; 70:388-9. [DOI: 10.1136/ard.2010.128652] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Visser K, Katchamart W, Loza E, Martinez-Lopez JA, Salliot C, Trudeau J, Bombardier C, Carmona L, van der Heijde D, Bijlsma JWJ, Boumpas DT, Canhao H, Edwards CJ, Hamuryudan V, Kvien TK, Leeb BF, Martín-Mola EM, Mielants H, Müller-Ladner U, Murphy G, Østergaard M, Pereira IA, Ramos-Remus C, Valentini G, Zochling J, Dougados M. Multinational evidence-based recommendations for the use of methotrexate in rheumatic disorders with a focus on rheumatoid arthritis: integrating systematic literature research and expert opinion of a broad international panel of rheumatologists in the 3E Initiative. Ann Rheum Dis 2008; 68:1086-93. [PMID: 19033291 PMCID: PMC2689523 DOI: 10.1136/ard.2008.094474] [Citation(s) in RCA: 307] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Objectives: To develop evidence-based recommendations for the use of methotrexate in daily clinical practice in rheumatic disorders. Methods: 751 rheumatologists from 17 countries participated in the 3E (Evidence, Expertise, Exchange) Initiative of 2007–8 consisting of three separate rounds of discussions and Delphi votes. Ten clinical questions concerning the use of methotrexate in rheumatic disorders were formulated. A systematic literature search in Medline, Embase, Cochrane Library and 2005–7 American College of Rheumatology/European League Against Rheumatism meeting abstracts was conducted. Selected articles were systematically reviewed and the evidence was appraised according to the Oxford levels of evidence. Each country elaborated a set of national recommendations. Finally, multinational recommendations were formulated and agreement among the participants and the potential impact on their clinical practice was assessed. Results: A total of 16 979 references was identified, of which 304 articles were included in the systematic reviews. Ten multinational key recommendations on the use of methotrexate were formulated. Nine recommendations were specific for rheumatoid arthritis (RA), including the work-up before initiating methotrexate, optimal dosage and route, use of folic acid, monitoring, management of hepatotoxicity, long-term safety, mono versus combination therapy and management in the perioperative period and before/during pregnancy. One recommendation concerned methotrexate as a steroid-sparing agent in other rheumatic diseases. Conclusions: Ten recommendations for the use of methotrexate in daily clinical practice focussed on RA were developed, which are evidence based and supported by a large panel of rheumatologists, enhancing their validity and practical use.
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Affiliation(s)
- K Visser
- Leiden University Medical Center, Department of Rheumatology, Leiden, The Netherlands.
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Sampaio-Barros PD, Carvalho MAP, Azevedo VF, Campos WR, Carneiro SCS, Giorgi RDN, Gonçalves CR, Hilário MOE, Keiserman MW, Leite NH, Pereira IA, Vieira WP, Vilela EG, Xavier RM, Ximenes AC. Espondiloartropatias: outras artropatias. Rev Bras Reumatol 2004. [DOI: 10.1590/s0482-50042004000600013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Sampaio-Barros PD, Carvalho MAP, Azevedo VF, Campos WR, Carneiro SCS, Giorgi RDN, Gonçalves CR, Hilário MOE, Keiserman MW, Leite NH, Pereira IA, Vieira WP, Vilela EG, Xavier RM, Ximenes AC. Espondiloartropatias: espondilite anquilosante e artrite psoriásica. Rev Bras Reumatol 2004. [DOI: 10.1590/s0482-50042004000600012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Abstract
A new tetraheme cytochrome c3 was isolated from the membranes of Desulfovibrio vulgaris Hildenborough (DvH). This cytochrome has a molecular mass of 13.4 kDa and a pI of 5.5 and contains four heme c groups with apparent reduction potentials of -170 mV, -235 mV, -260 mV and -325 mV at pH 7.6. The complete sequence of the new cytochrome, retrieved from the preliminary data of the DvH genome, shows that this cytochrome is homologous to the "acidic" cytochrome c3 from Desulfovibrio africanus (Da). A model for the structure of the DvH cytochrome was built based on the structure of the Da cytochrome. Both cytochromes share structural features that distinguish them from other cytochrome c3 proteins, such as a solvent-exposed heme 1 surrounded by an acidic surface area, and a heme 4 which lacks most of the surface lysine patch proposed to be the site of hydrogenase interaction in other cytochrome c3 proteins. Furthermore, in contrast to previously discovered cytochrome c3 proteins, the genes coding for these two cytochromes are adjacent to genes coding for two membrane-associated FeS proteins, which indicates that they may be part of membrane-bound oxidoreductase complexes. Altogether these observations suggest that the DvH and Da cytochromes are a new type of cytochrome c3 proteins (Type II: TpII-c3) with different redox partners and physiological function than the other cytochrome c3 proteins (Type I: TpI-c3). The DvH TpII-c3 is reduced at considerable rates by the two membrane-bound [NiFe] and [NiFeSe] hydrogenases, but catalytic amounts of TpI-c3 increase these rates two- and fourfold, respectively. With the periplasmic [Fe] hydrogenase TpII-c3 is reduced much slower than TpI-c3, and no catalytic effect of TpI-c3 is observed.
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Affiliation(s)
- F M Valente
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Apt. 127, 2780-156 Oeiras, Portugal
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Pereira IA, LeGall J, Xavier AV, Teixeira M. Characterization of a heme c nitrite reductase from a non-ammonifying microorganism, Desulfovibrio vulgaris Hildenborough. Biochim Biophys Acta 2000; 1481:119-30. [PMID: 11004582 DOI: 10.1016/s0167-4838(00)00111-4] [Citation(s) in RCA: 91] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
A cytochrome c nitrite reductase (NiR) was purified for the first time from a microorganism not capable of growing on nitrate, the sulfate-reducing bacterium Desulfovibrio vulgaris Hildenborough. It was isolated from the membranes as a large heterooligomeric complex of 760 kDa, containing two cytochrome c subunits of 56 and 18 kDa. This complex has nitrite and sulfite reductase activities of 685 micromol NH(4)(+)/min/mg and 1.0 micromol H(2)/min/mg. The enzyme was studied by UV-visible and electron paramagnetic resonance (EPR) spectroscopies. The overall redox behavior was determined through a visible redox titration. The data were analyzed with a set of four redox transitions, with an E(0)' of +160 mV (12% of total absorption), -5 mV (38% of total absorption), -110 mV (38% of total absorption) and -210 mV (12% of total absorption) at pH 7.6. The EPR spectra of oxidized and partially reduced NiR show a complex pattern, indicative of multiple heme-heme magnetic interactions. It was found that D. vulgaris Hildenborough is not capable of using nitrite as a terminal electron acceptor. These results indicate that in this organism the NiR is not involved in the dissimilative reduction of nitrite, as is the case with the other similar enzymes isolated so far. The possible role of this enzyme in the detoxification of nitrite and/or in the reduction of sulfite is discussed.
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Affiliation(s)
- I A Pereira
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Portugal.
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Loubinoux J, Mory F, Pereira IA, Le Faou AE. Bacteremia caused by a strain of Desulfovibrio related to the provisionally named Desulfovibrio fairfieldensis. J Clin Microbiol 2000; 38:931-4. [PMID: 10655421 PMCID: PMC86253 DOI: 10.1128/jcm.38.2.931-934.2000] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Eight isolates of Desulfovibrio spp. have been obtained over 5 years from abdominal or brain abscesses or blood. Seven isolates were part of a mixed flora [corrected]. One strain was isolated in pure culture from the blood of a patient with peritonitis of appendicular origin. According to the 16S rRNA gene sequences, this strain was close to Desulfovibrio fairfieldensis. The present report describes the fourth isolate of this recently described species to be isolated in pure culture or as a predominant part of the flora and to be associated with infectious processes. Thus, D. fairfieldensis may possess a higher pathogenic potential than other Desulfovibrio species.
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Affiliation(s)
- J Loubinoux
- UMR UHP-CNRS 7565, Laboratoire de Bactériologie-Virologie, Faculté de Médecine de Nancy, 54505 Vandoeuvre-lès-Nancy Cedex, France
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Matias PM, Coelho R, Pereira IA, Coelho AV, Thompson AW, Sieker LC, Gall JL, Carrondo MA. The primary and three-dimensional structures of a nine-haem cytochrome c from Desulfovibrio desulfuricans ATCC 27774 reveal a new member of the Hmc family. Structure 1999; 7:119-30. [PMID: 10368280 DOI: 10.1016/s0969-2126(99)80019-7] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
BACKGROUND Haem-containing proteins are directly involved in electron transfer as well as in enzymatic functions. The nine-haem cytochrome c (9Hcc), previously described as having 12 haem groups, was isolated from cells of Desulfovibrio desulfuricans ATCC 27774, grown under both nitrate- and sulphate-respiring conditions. RESULTS Models for the primary and three-dimensional structures of this cytochrome, containing 292 amino acid residues and nine haem groups, were derived using the multiple wavelength anomalous dispersion phasing method and refined using 1.8 A diffraction data to an R value of 17.0%. The nine haem groups are arranged into two tetrahaem clusters, with Fe-Fe distances and local protein fold similar to tetrahaem cytochromes c3, while the extra haem is located asymmetrically between the two clusters. CONCLUSIONS This is the first known three-dimensional structure in which multiple copies of a tetrahaem cytochrome c3-like fold are present in the same polypeptide chain. Sequence homology was found between this cytochrome and the C-terminal region (residues 229-514) of the high molecular weight cytochrome c from Desulfovibrio vulgaris Hildenborough (DvH Hmc). A new haem arrangement in domains III and IV of DvH Hmc is proposed. Kinetic experiments showed that 9Hcc can be reduced by the [NiFe] hydrogenase from D. desulfuricans ATCC 27774, but that this reduction is faster in the presence of tetrahaem cytochrome c3. As Hmc has never been found in D. desulfuricans ATCC 27774, we propose that 9Hcc replaces it in this organism and is therefore probably involved in electron transfer across the membrane.
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Affiliation(s)
- P M Matias
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, 2780 OEIRAS, Portugal
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Romão CV, Pereira IA, Xavier AV, LeGall J, Teixeira M. Characterization of the [NiFe] hydrogenase from the sulfate reducer Desulfovibrio vulgaris Hildenborough. Biochem Biophys Res Commun 1997; 240:75-9. [PMID: 9367885 DOI: 10.1006/bbrc.1997.7598] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The [NiFe] hydrogenase from Desulfovibrio vulgaris Hildenborough was isolated from the cytoplasmic membranes and characterized by EPR spectroscopy. It has a total molecular mass of 98.7 kDa (subunits of 66.4 and 32.3 kDa), and contains 1 nickel and 12 Fe atoms per heterodimer. The catalytic activities for hydrogen consumption and production were determined to be 174 and 89 mumol H2.min-1.mg-1, respectively. As isolated, under aerobic conditions, this hydrogenase exhibits EPR signals characteristic of the nickel centers in [NiFe] hydrogenases (Ni-A signal at gx,y,z = 2.32, 2.23 and approximately 2.0 and Ni-B signal at gx,y,z = 2.33, 2.16 and approximately 2.0) as well as an intense quasi-isotropic signal centered at g = 2.02 due to the oxidized [3Fe-4S] center. The redox profile under hydrogen atmosphere is remarkably similar to that of other [NiFe] hydrogenases. The signals observed for the oxidized state disappear, first being substituted by the Ni-C type signal (gx,y,z = 2.19, 2.14, approximately 2.01), which upon long incubation under hydrogen yields the split Ni-C signal due to interaction with the reduced [4Fe-4S] centers.
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Affiliation(s)
- C V Romão
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
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Pereira IA, Pereira RM, Borba EF, Gonçalves CR, Yoshinari NY, Cossermelli W. [Low complement levels in urticarial vasculitis as first manifestation of systemic lupus erythematosus]. Rev Assoc Med Bras (1992) 1997; 43:311-3. [PMID: 9595743 DOI: 10.1590/s0104-42301997000400006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Hypocomplementaemic urticarial vasculitis syndrome is a leukocytoclastic vasculitis characterized by urticarial lesions, associated with fever, arthralgias, arthritis and abdominal pain. Other systemic manifestations include glomerulonephritis, uveitis, episcleritis, chronic obstructive pulmonary disease and neurological abnormalities. Some case associated with systemic lupus erythematosus have been described and SLE diagnosis was made by previous or concomitant diagnostic criteria before onset of urticarial vasculitis. Urticarial vasculitis prior to SLE diagnosis is rare. The development of anti-Ro/SS-A antibody for the diagnosis of SLE is emphasized. The authors alert to the importance of periodically searching for this marker in patients with urticarial vasculitis.
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Affiliation(s)
- I A Pereira
- Disciplina de Reumatologia do Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo
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Pereira IA, Pacheco I, Liu MY, Legall J, Xavier AV, Teixeira M. Multiheme cytochromes from the sulfur-reducing bacterium Desulfuromonas acetoxidans. Eur J Biochem 1997; 248:323-8. [PMID: 9346284 DOI: 10.1111/j.1432-1033.1997.00323.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Two new multiheme cytochromes were isolated from the anaerobic sulfur reducing bacterium Desulfuromonas acetoxidans. They have monomeric molecular masses of 50 and 65 kDa and contain six and eight hemes, respectively. Visible and EPR spectroscopies, in the as-isolated (oxidised) cytochromes, show the presence of only low-spin hemes in the 50-kDa cytochrome, and of high-spin and low-spin hemes in the 65-kDa cytochrome. The EPR spectra of the native 65-kDa cytochrome indicate multiple heme-heme interactions, including integer-spin systems as judged by parallel-mode EPR. The 50-kDa cytochrome has a complex redox pattern, as shown by EPR redox titrations, and contains one heme with unusual characteristics. Both cytochromes cover an extremely wide range of reduction potentials, which go from +100 mV to -375 mV for the 50-kDa cytochrome, and +185 mV to -235 mV for the 65-kDa cytochrome. The two cytochromes were tested for hydroxylamine oxidoreductase activity and polysulfide reductase activity, but neither displayed any activity. In contrast, it was found for the first time that the previously characterised cytochrome c551.5, from the same bacterium is very active in the reduction of polysulfide, which suggests that it acts as a terminal reductase in D. acetoxidans.
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Affiliation(s)
- I A Pereira
- Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, Oeiras, Portugal
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Borba EF, Pereira RM, Velloso ED, Pereira IA, Goncalves CR, Yoshinari NH. Neutropenia associated with myelofibrosis in systemic lupus erythematosus. Acta Haematol 1993; 89:82-5. [PMID: 8503249 DOI: 10.1159/000204493] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Although myelofibrosis has been described in systemic lupus erythematosus (SLE), this coexistence must be rare since there are few reports showing this combination. The possible relationship between hematologic abnormalities and SLE remains unresolved. The authors describe a 39-year-old woman with persistent neutropenia and SLE in whom myelofibrosis was found. Unlike previously reported cases, myelofibrosis did not resolve with steroid therapy. In this report, the clinical course of the patient is compared with others described in the literature.
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Affiliation(s)
- E F Borba
- Department of Rheumatology, School of Medicine, University of São Paulo, Brazil
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Pereira IA, Pereira RM, Borba EF, Gonçalves CR, Yoshinari NH, Cossermelli W. [Primary erythromelalgia]. Rev Assoc Med Bras (1992) 1992; 38:228-30. [PMID: 1340383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Erythromelalgia is a rare disease characterized by intense erythema, burning pain and increased temperature in the distal of the extremities. Primary forms and secondary forms have been described, most commonly with essential thrombocythemia and policythemia vera. The authors describe a fifteen year old patient with primary erythromelalgia and discuss the pathogenic, clinical and therapeutic features of this disease.
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Affiliation(s)
- I A Pereira
- Disciplina de Reumatologia do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo
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