The ambiguous role of interferon regulatory factor-1 (IRF-1) immunoexpression in myelodysplastic syndrome.
Recent investigations postulate a participation of the interferon regulatory factor-1 (IRF-1) in the development of myelodysplasia (MDS) and in the pathogenesis of autoimmune manifestations (AIMs) in patients with this disease. The aim of this prospective study was to compare the IRF-1 immunoexpression in MDS patients with or without AIMs and to investigate its prognostic relevance. Fifty consecutive MDS patients entered this prospective study. There was no difference in overall survival between patients with or without autoimmune manifestations. In a multivariate Cox regression "IRF-1 expression in immature myeloid cells", Hb, and the IPSS risk group stratification were independent prognostic parameters. Bootstrap resampling confirmed these data. In a multivariate logistic regression older patients with, higher platelet count and increased IRF-1 expression had a higher risk to develop autoimmune-like phenomena. Thus our study shows that IRF-1 plays an ambiguous role in MDS patients. Whereas high levels of IRF-1 in myeloid cells are a favorable prognostic factor for overall survival, they increase the probability of the manifestation of autoimmune phenomena, with a diminished quality of life.
Disciplina de Hematologia e Hemoterapia-Universidade Federal de São Paulo-UNIFESP-EPM, Brazil.
Ronald Feitosa
RF
Pinheiro
Konradin
K
Metze
Maria Regina Régis
MR
Silva
Maria de Lourdes Lopes Ferrari
Mde L
Chauffaille
D000368:Aged; D000369:Aged, 80 and over; D001327:Autoimmune Diseases / Q000235:genetics*; D005260:Female; D005500:Follow-Up Studies; D005786:Gene Expression Regulation; D006801:Humans; D050856:Interferon Regulatory Factor-1 / Q000235:genetics* / Q000378:metabolism; D007621:Karyotyping; D008297:Male; D008875:Middle Aged; D009190:Myelodysplastic Syndromes / Q000235:genetics* / Q000401:mortality / Q000503:physiopathology / Q000523:psychology; D022423:Myeloid Cells / Q000502:physiology; D011446:Prospective Studies; D011788:Quality of Life; D012044:Regression Analysis; D015996:Survival Rate; D017741:Survivors; D055815:Young Adult
D050856:Interferon Regulatory Factor-1