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001-es BibID:	BIBFORM083545
035-os BibID:	(WOS)000537433000017 (Scopus)85084167516
Első szerző:	Betteridge, Zoe
Cím:	Identification of a novel autoantigen eukaryotic initiation factor 3 associated with polymyositis / Zoe Betteridge, Hector Chinoy, Jiri Vencovsky, John Winer, Kiran Putchakayala, Pauline Ho, Ingrid Lundberg, Katalin Danko, Robert Cooper, Neil McHugh
Dátum:	2020
ISSN:	1462-0324 1462-0332
Megjegyzések:	OBJECTIVES: To describe the prevalence and clinical associations of autoantibodies to a novel autoantigen, eukaryotic initiation factor 3 (eIF3), detected in idiopathic inflammatory myositis. METHODS: Sera or plasma from 678 PM patients were analysed for autoantigen specificity by radio-labelled protein immunoprecipitation (IPP). Samples immunoprecipitating the same novel autoantigens were further analysed by indirect immunofluorescence and IPP using pre-depleted cell extracts. The autoantigen was identified through a combination of IPP and MALDI-TOF mass spectrometry, and confirmed using commercial antibodies and IPP-western blots. Additional samples from patients with DM (668), DM-overlap (80), PM-overlap (191), systemic sclerosis (150), systemic lupus erythematosus (200), Sjogren's syndrome (40), rheumatoid arthritis (50) and healthy controls (150) were serotyped by IPP as disease or healthy controls. RESULTS: IPP revealed a novel pattern in three PM patients (0.44%) that was not found in disease-specific or healthy control sera. Indirect immunofluorescence demonstrated a fine cytoplasmic speckled pattern for all positive patients. Mass spectrometry analysis of the protein complex identified the target autoantigen as eIF3, a cytoplasmic complex with a role in the initiation of translation. Findings were confirmed by IPP-Western blotting. The three anti-eIF3-positive patients had no history of malignancy or interstitial lung disease, and had a favourable response to treatment. CONCLUSION: We report a novel autoantibody in 0.44% of PM patients directed against a cytoplasmic complex of proteins identified as eIF3. Although our findings need further confirmation, anti-eIF3 appears to correlate with a good prognosis and a favourable response to treatment.
Tárgyszavak:	Orvostudományok Klinikai orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk autoantibodies autoantigens myositis
Megjelenés:	Rheumatology. - 59 : 5 (2020), p. 1026-1030. -
További szerzők:	Chinoy, Hector Vencovsky, Jiri Winer, John Putchakayala, Kiran Ho, Pauline Lundberg, Ingrid Dankó Katalin (1952-2021) (belgyógyász, allergológus és klinikai immunológus) Cooper, Robert G. McHugh, Neil
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