By Susan O'Brien, John G. Gribben
Written by means of authors from the world’s so much favorite melanoma facilities, persistent Lymphocytic Leukemia offers a complete, up to date photograph of CLL and the way to higher deal with sufferers inflicted with the illness. New info on advancements within the molecular pathogenesis of this ailment affects how physicians method and deal with sufferers with CLL. many of the predisposing elements for the sickness are addressed besides present and destiny therapy modalities and advised criteria of care. Key good points contain: creation by way of Kanti Rai, MD who built the Rai category and Staging approach utilized in CLL prognosis CLL in dating to gene expression profiling and molecular abnormalities familial clustering and gene predisposition specified treatment trials medical sufferer administration established upon level and development of ailment
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Additional info for Chronic Lymphocytic Leukemia
INTRODUCTION B-cell chronic lymphocytic leukemia (CLL) had long been recognized as a morphologically homogeneous disease of mature, resting B lymphocytes. CLL cells are characterized by the expression of the cell surface antigens CD5, CD23, and CD27, and low level of surface immunoglobulin (Ig), a pattern not observed on any normal B cell (1,2). Despite their uniform histological appearance, however, CLL cases turned out to be surprisingly heterogeneous. First, the rearranged Ig variable region (IgV) genes of CLL cases can be either somatically mutated or unmutated (3–5), implying that the corresponding precursor cells may originate from either T cell–dependent or T cell– independent responses.
The expression level of the respective genes in CLL and Burkitt lymphoma (BL) is shown along with the differentially expressed genes. The relatedness of the tumor cases to either the GC B cells or the non-GC B cells is visible from the expression values coded in shades of gray and can be quantitatively expressed by statistical analysis (not shown). Upregulated and downregulated genes are identified by darker and lighter gray tones, respectively. Abbreviations: CLL, chronic lymphocytic leukemia; GC, germinal center (See Color Insert).
The case of the VH3-21 gene segment suggests that it appears to be the particular antigen receptor rather than the level of IgV somatic hypermutation as such that correlates with good or bad clinical prognosis. In several published GEP-based studies on CLL, biostatistical analyses suggested the existence of clinically defined subgroups. Thus, a subgroup of CLL was identified that predominantly comprised patients with a more favorable clinical course with longer progression-free survival (24). Other studies described a set of genes that correlated with clinical staging (29), or the identification of genes that distinguished Rai stage 0 from stage 4 patients in the respective panels (23).