T-cell nonmalignant clonal proliferation in ataxia telangiectasia: a cytological, immunological, and molecular characterization.

نویسندگان

  • M H Stern
  • I Theodorou
  • A Aurias
  • M Maier-Redelsperger
  • M Debre
  • P Debre
  • C Griscelli
چکیده

Cytogenetically abnormal T-cell nonmalignant clones are a characteristic feature of ataxia telangiectasia (AT). Here, we study a t(14;14) clone from a patient with AT, and provide a cytological, immunological, and molecular characterization. This cellular population is clonal at the molecular level, but is phenotypically heterogeneous, with CD4+CD8+ and CD4-CD8+ cells. Although these cells do not divide in the peripheral blood, a majority of them are found in G1 phase and express the membrane antigen 4F2, a very early marker of activation. Many similarities are found between this nonmalignant AT clone and T-cell prolymphocytic leukemia at the morphologic, cytogenetic, and immunologic levels, despite the different clinical courses associated with these proliferations. We hypothesize that the t(14;14) translocation is linked to the abnormal morphology and immunophenotype of the AT clone cells, but that this translocation confers only a preactivated state to the cells. A complete malignant transformation would then be due to secondary events.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Regulation of oxidative stress responses by ataxia-telangiectasia mutated is required for T cell proliferation.

Mutations in the gene encoding ataxia-telangiectasia (A-T) mutated (Atm) cause the disease A-T, characterized by immunodeficiency, the molecular basis of which is not known. Following stimulation through the TCR, Atm-deficient T cells and normal T cells in which Atm is inhibited undergo apoptosis rather than proliferation. Apoptosis is prevented by scavenging reactive oxygen species (ROS) durin...

متن کامل

Phospho-SMC1 in-Cell ELISA based Detection of Ataxia Telangiectasia

BackgroundAtaxia telangiectasia (A-T) is a common genetically inherited cause of early childhood-onset ataxia. The infrequency of this disease, vast phenotype variation, disorders with features similar to those of A-T, and lack of definite laboratory test, make diagnosis difficult.  In addition, there is no rapid reliable laboratory method for identifying A-T heterozygotes, who susceptible to i...

متن کامل

TCL-1, MTCP-1 and TML-1 gene expression profile in non-leukemic clonal proliferations associated with ataxia-telangiectasia.

We analyzed the role of 4 genes, TCL-1, MTCP-1, TML-1 and ATM, in the early pathogenesis of T cell leukemia, with particular interest in the characteristics of long-standing non-leukemic clonal proliferations in ataxia-telangiectasia (A-T) patients. Five patients were studied: 4 patients had A-T (2 of whom had non-leukemic clonal proliferations [ATCP]), 1 had B cell lymphoma and 1 had T-ALL; a ...

متن کامل

Role of Mitochondria in Ataxia-Telangiectasia: Investigation of Mitochondrial Deletions and Haplogroups

Ataxia-Telangiectasia (AT) is a rare human neurodegenerative autosomal recessive multisystem disease that is characterized by a wide range of features including, progressive cerebellar ataxia with onset during infancy, occulocutaneous telangiectasia, susceptibility to neoplasia, occulomotor disturbances, chromosomal instability and growth and developmental abnormalities. Mitochondrial DNA (mtDN...

متن کامل

Cutaneous granulomas in ataxia telangiectasia and other primary immunodeficiencies: reflection of inappropriate immune regulation?

BACKGROUND Non-infective cutaneous granulomas with unknown pathogenesis occur in various primary immunodeficiencies (PIDs) including ataxia telangiectasia (A-T). OBJECTIVE To find a common immunological denominator in these cutaneous granulomas. METHODS The dermatological and immunological features of 4 patients with A-T and cutaneous granulomas were described. The literature on skin granul...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:
  • Blood

دوره 73 5  شماره 

صفحات  -

تاریخ انتشار 1989