{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T21:54:27Z","timestamp":1790373267571,"version":"4.1.0"},"reference-count":44,"publisher":"Oxford University Press (OUP)","issue":"9","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2010,5,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Extracellular ATP and adenosine are important regulators of immune responses; however, contribution of purinergic signaling to host defense during persistent microbial infections remains obscure. Lyme borreliosis is a common arthropod-borne infection caused by Borrelia burgdorferi sensu lato. In this study, we investigated whether lymphoid purinergic signaling contributes to the mechanisms by which borreliae species evade the immune system and trigger joint inflammation. Intracutaneous inoculation of Borrelia garinii to C3H\/He mice induced symptomatic infection manifested in elevated levels of borrelia-specific IgG Abs, persistent spirochete dissemination into the tissues and joint swelling, as well as \u223c2- to 2.5-fold enlargement of draining lymph nodes with hyperplasia of B cell follicle area and L-selectin shedding from activated T lymphocytes. Purine catabolism was also activated in lymph nodes but not spleen and blood of infected C3H\/He mice within the first 4 postinfection weeks, particularly manifested in transient upregulations of adenosine triphosphatase\/ectonucleoside triphosphate diphosphohydrolase and ecto-5\u2032-nucleotidase\/CD73 on CD4+CD8+ T lymphocytes and adenosine deaminase activity on B220+ B lymphocytes. Compared with borrelia-susceptible C3H\/He strain, lymphocytes from C57BL\/6 mice displayed markedly enhanced adenosine-generating capability due to approximately three times higher ratio of ecto-5\u2032-nucleotidase to adenosine deaminase. Borrelia-infected C57BL\/6 mice efficiently eradicated the inoculated spirochetes at more chronic stage without any signs of arthritis. Strikingly, deletion of key adenosine-generating enzyme, ecto-5\u2032-nucleotidase\/CD73, was accompanied by significantly enhanced joint swelling in borrelia-infected CD73-deficient C57BL\/6 mice. Collectively, these data suggest that insufficient basal adenosine level and\/or pathogen-induced disordered lymphoid purine homeostasis may serve as important prerequisite for promotion of inflammatory responses and further host\u2019s commitment to persistence of bacterial infection and arthritis development.<\/jats:p>","DOI":"10.4049\/jimmunol.0902760","type":"journal-article","created":{"date-parts":[[2010,4,1]],"date-time":"2010-04-01T03:07:42Z","timestamp":1270091262000},"page":"5112-5120","source":"Crossref","is-referenced-by-count":19,"title":["Disordered Lymphoid Purine Metabolism Contributes to the Pathogenesis of Persistent<i>Borrelia garinii<\/i>Infection in Mice"],"prefix":"10.1093","volume":"184","author":[{"given":"Gennady G.","family":"Yegutkin","sequence":"first","affiliation":[{"name":"*MediCity Research Laboratory and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jukka","family":"Hyt\u00f6nen","sequence":"additional","affiliation":[{"name":"\u2020Department of Medical Microbiology and Immunology, University of Turku, Turku, Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sergei S.","family":"Samburski","sequence":"additional","affiliation":[{"name":"*MediCity Research Laboratory and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Heta","family":"Yrj\u00e4n\u00e4inen","sequence":"additional","affiliation":[{"name":"\u2020Department of Medical Microbiology and Immunology, University of Turku, Turku, Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sirpa","family":"Jalkanen","sequence":"additional","affiliation":[{"name":"*MediCity Research Laboratory and"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Matti K.","family":"Viljanen","sequence":"additional","affiliation":[{"name":"\u2020Department of Medical Microbiology and Immunology, University of Turku, Turku, Finland"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"286","published-online":{"date-parts":[[2010,5,1]]},"reference":[{"key":"2023010204101721500_r1","doi-asserted-by":"crossref","first-page":"2962","DOI":"10.4049\/jimmunol.170.6.2962","article-title":"Secretion of IL-2 and IFN-\u03b3, but not IL-4, by antigen-specific T cells requires extracellular ATP.","volume":"170","author":"Langston","year":"2003","journal-title":"J. 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