Search results for "self-antigens"

showing 3 items of 3 documents

Human parvovirus B19 induced apoptotic bodies contain altered self-antigens that are phagocytosed by antigen presenting cells.

2013

Human parvovirus B19 (B19V) from the erythrovirus genus is known to be a pathogenic virus in humans. Prevalence of B19V infection has been reported worldwide in all seasons, with a high incidence in the spring. B19V is responsible for erythema infectiosum (fifth disease) commonly seen in children. Its other clinical presentations include arthralgia, arthritis, transient aplastic crisis, chronic anemia, congenital anemia, and hydrops fetalis. In addition, B19V infection has been reported to trigger autoimmune diseases such as systemic lupus erythematosus and rheumatoid arthritis. However, the mechanisms of B19V participation in autoimmunity are not fully understood. B19V induced chronic dise…

Programmed cell deathScienceAntigen-Presenting CellsArthritisApoptosisAutoimmunitySpodopteraViral Nonstructural ProteinsBiologymedicine.disease_causeAutoantigensVirusautoimmuniteettiImmune toleranceAutoimmunityParvoviridae InfectionsPathogenesis03 medical and health sciences0302 clinical medicineImmune systemPhagocytosisImmune ToleranceParvovirus B19 HumanSf9 CellsHuman Parvovirus B19medicineta319AnimalsHumansAntigen-presenting cellself-antigens030304 developmental biology0303 health sciencesMultidisciplinaryQta1182RHep G2 CellsFlow Cytometrymedicine.diseaseVirology3. Good healthImmunologyMicroscopy Electron ScanningMedicineResearch Article030215 immunologyPLoS ONE
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Immune tolerance disruption by human parvovirus B19 viral infection mechanisms

2013

Virusinfektioita pidetään kasvavissa määrin suurimpana ympäristöperäisenä syynä, joka vaikuttaa autoimmuunisairauksien kehitykseen ja autoimmuniteetin muodostukseen. Esimerkiksi parvovirus B19 (B19V) on yhdistetty punahukkaan sekä nivelreumaan. On todettu, että B19V:n ei-rakenteellinen proteiini 1 (NS1) aiheuttaa apoptoosia soluissa, jotka eivät tavallisesti ole B19V infektion kohteena. Lisäksi hiljattain on osoitettu, että apoptoosin seurauksena muodostuvat apoptoottiset kappaleet kykenevät esittelemään antigeenejä niitä esittelemään erikoistuneille soluille, kuten makrofageille tai dendriittisoluille. Tämän tutkimuksen tarkoituksena on löytää B19V infektioon liittyviä autoantigeenejä sekä…

immune toleranceohjelmoitunut solukuolemaantigeenitnuclear antigensimmuniteettiapoptotic bodiesself-antigensparvoviruksetHuman parvovirus B19
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Pathogenic mechanisms of how human parvovirus breaks self-tolerance

2017

It is known that viral infections can cause acute, chronic, and autoimmune diseases (ADs). However, the mechanism of how a persistent viral infection contributes to ADs remains still unclear. In this thesis, pathological and immunological aspects of how common viruses can initiate autoimmunity were investigated, and human parvovirus B19 (B19V) was employed as a model virus. B19V non-structural protein 1 (NS1), a superfamily 3 (SF3) helicase, initiated DNA damage resulting in cellular apoptosis. The apoptotic bodies (ApoBods) induced by B19V NS1 were purified and characterized. These ApoBods contained viral NS1 proteins with modified autoimmune-associated self-antigens, e.g. DNA, Smith, Apol…

viruksetautoantibodiespatogeneesivirusesautoimmunityapoptosisvasta-aineetinfektiotautoimmuniteettiohjelmoitunut solukuolemaantigeenitimmunologianon-structural protein 1autovasta-aineethuman parvovirus B19apoptotic bodiesself-antigensparvovirukset
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