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Updated: Jun 2, 2026
From a 2DE-Gel Spot to Protein Function: Lesson Learned From HS1 in Chronic Lymphocytic Leukemia
Published on: October 19, 2014
Separation of chronic lymphocytic-leukemia (cll) cells by a discontinuous density gradient - correlation with
Insights
Cell density in chronic lymphocytic leukemia (CLL) patients varies by disease stage. Lighter density malignant B lymphocytes correlate with advanced CLL, suggesting a potential new prognostic marker.
Area of Science:
- Hematology
- Oncology
- Immunology
Background:
- Chronic lymphocytic leukemia (CLL) is a heterogeneous lymphoid malignancy.
- Understanding the biological characteristics of malignant cells is crucial for prognosis.
Purpose of the Study:
- To investigate the density distribution of malignant B lymphocytes in chronic lymphocytic leukemia (CLL) patients.
- To explore the potential of cell density as a prognostic marker in CLL.
Main Methods:
- Peripheral blood and bone marrow cells from 15 CLL patients were separated using albumin density gradient centrifugation.
- In vitro B cell colony formation assays were performed on fractionated peripheral blood cells from 10 patients.
Main Results:
- Malignant B lymphocyte distribution differed between CLL patients and healthy volunteers.
- In advanced CLL (Rai stages 3-4), B-lymphocyte colonies predominantly formed in lighter density fractions (1+2, 3).
- In early-stage CLL (Rai stages 0-2), colonies were mainly found in heavier fractions (4, bottom).
Conclusions:
- The density of chronic lymphocytic leukemia (CLL) cells varies based on disease stage.
- Cell density may serve as a novel prognostic indicator for chronic lymphocytic leukemia (CLL).
Abstract:
Peripheral blood or bone marrow cells of 15 patients with chronic lymphocytic leukemia (CLL) were separated on an albumin density gradient. In 5 of 5 CLL patients, the distribution of malignant B lymphocytes was similar across the gradient when blood and bone marrow were compared, but different from the distribution of cells from healthy volunteers. In 10 patients, B cell colony formation was measured in vitro from peripheral blood cells after gradient fractionation. Although most of the cells in all patients were found in fraction 4, the majority of B-lymphocyte colonies were found in light density fractions (1+2, 3) in patients with more advanced disease (Rai stages 3 or 4), and in heavier fractions (4, bottom) in patients with less advanced disease (Rai stages 0, 1 or 2). The density of CLL cells might provide a new prognostic marker in this disease.
