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Natural IgM antibodies in the immune defence against neoehrlichiosis
Department of Infectious Diseases and Hematology , Sahlgrenska Academy, University of Gothenburg , Göteborg , Sweden.
Immunobiology Section , Great Ormond Street Institute of Child Health, University College London , London , UK.
Immunobiology Section , Great Ormond Street Institute of Child Health, University College London , London , UK.
Department of Hematology , Uppsala University Hospital , Uppsala , Sweden.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Infectious Diseases, ISSN 2374-4235, E-ISSN 2374-4243, Vol. 49, nr 11, s. 809-816Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Background: Neoehrlichiosis is an infectious disease caused by the tick-borne bacterium ?Candidatus Neoehrlichia mikurensis?. Splenectomy and rituximab therapies are risk factors for severe neoehrlichiosis. Our aim was to examine if neoehrlichiosis patients had low levels of natural IgM antibodies and/or were hypogammaglobulinemic, and if such deficiencies were associated with asplenia and vascular complications.

Methods: Neoehrlichiosis patients (n?=?9) and control subjects (n?=?10) were investigated for serum levels of IgG, IgA, and IgM, and for levels of natural IgM antibodies to pneumococcal polysaccharides (6B, 14), and to the malondialdehyde acetaldehyde epitope of oxidized LDL. The multivariate method Projection to Latent Structures was used to analyze the data.

Results: The levels of natural IgM antibodies of various specificities were decreased or not measurable in half of the studied patients with neoehrlichiosis. Only one patient and one control subject were hypogammaglobulinemic. An inverse relationship was noted between the levels of natural IgM antibodies and the development of deep vein thrombosis. Unexpectedly, no association was seen between having or not having a spleen and the levels of natural IgM antibody levels in the circulation.

Conclusions: Neither hypogammaglobulinemia nor lack of natural IgM antibodies alone predisposes for severe neoehrlichiosis. The importance of the spleen in the immune defence against Ca. N. mikurensis probably lies in its capacity to generate or maintain specific antibodies.

sted, utgiver, år, opplag, sider
Taylor & Francis, 2017. Vol. 49, nr 11, s. 809-816
Emneord [en]
Candidatus Neoehrlichia mikurensis, natural IgM antibodies, malondialdehyde acetaldehyde epitope, pneumococci
HSV kategori
Identifikatorer
URN: urn:nbn:se:liu:diva-139739DOI: 10.1080/23744235.2017.1347815ISI: 000408792600004PubMedID: 28682152Scopus ID: 2-s2.0-85022013697OAI: oai:DiVA.org:liu-139739DiVA, id: diva2:1131500
Merknad

Funding agencies: Swedish Cancer and Allergy Foundation [149781]; ALF Project grant [71580]; Vastra Gotaland Research and Development grant [94510]; Swedish Cancer Association; National Institute for Health Research UK

Tilgjengelig fra: 2017-08-14 Laget: 2017-08-14 Sist oppdatert: 2017-09-22bibliografisk kontrollert

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