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Analysis of ex vivo Apoptosis of B and T cells from Peripheral Blood and Bone Marrow of Patients with Chronic Lymphocytic Leukemia
Affiliations- Katedra i Zakład Immunologii Klinicznej, UM w Lublinie Kierownik: prof. dr hab. n. med. Jacek Roliński
- Katedra i Klinika Hematoonkologii i Transplantacji Szpiku, UM w Lublinie Kierownik: prof. dr hab. n. med. Anna Dmoszyńska
- Oddział Anestezjologii i Intensywnej Terapii Dziecięcy Szpital Kliniczny im. prof. Antoniego Gębali Kierownik: dr n. med. Witold Lesiuk
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Abstract
In this study we analyzed selected parameters of apoptosis in leukemic cells from peripheral blood and bone marrow of patients with chronic lymphocytic leukemia (CLL). The percentage of apoptotic leukemic B cells (Δψmlow/CD19+) was significantly lower in peripheral blood (median: 0.99%) than in bone marrow (median: 1.41%) (p<0.0001). These data can support the idea that these two compartments might have different proliferative statuses. There was an inverse correlation between the ex vivo percentage of apoptotic cells and lymphocytosis (R=-0.34; p<0.01), and a direct correlation between the percentage of PB apoptotic B cells and the Rai stage (R=0.42; p<0.05). The percentage of Δψmlow/CD19+ cells was significantly higher in ZAP-70-positive patients than from ZAP-70-negative patients (p<0.01). There was also a significant difference in the median percentage of apoptotic leukemic B cells between the patients carrying del(11q22.3) or/and del(17p13.1) (2.7%) and the patients without these unfavorable genetic aberrations (1.6%) (p<0.01). The B cells from ZAP-70-positive patients with more aggressive disease seem to be more susceptible to spontaneous apoptosis than those from ZAP-70-negative patients. We conclude that the evaluation of ex vivo apoptosis might provide new important information concerning the biology and prognosis of CLL.
Abstract
In this study we analyzed selected parameters of apoptosis in leukemic cells from peripheral blood and bone marrow of patients with chronic lymphocytic leukemia (CLL). The percentage of apoptotic leukemic B cells (Δψmlow/CD19+) was significantly lower in peripheral blood (median: 0.99%) than in bone marrow (median: 1.41%) (p<0.0001). These data can support the idea that these two compartments might have different proliferative statuses. There was an inverse correlation between the ex vivo percentage of apoptotic cells and lymphocytosis (R=-0.34; p<0.01), and a direct correlation between the percentage of PB apoptotic B cells and the Rai stage (R=0.42; p<0.05). The percentage of Δψmlow/CD19+ cells was significantly higher in ZAP-70-positive patients than from ZAP-70-negative patients (p<0.01). There was also a significant difference in the median percentage of apoptotic leukemic B cells between the patients carrying del(11q22.3) or/and del(17p13.1) (2.7%) and the patients without these unfavorable genetic aberrations (1.6%) (p<0.01). The B cells from ZAP-70-positive patients with more aggressive disease seem to be more susceptible to spontaneous apoptosis than those from ZAP-70-negative patients. We conclude that the evaluation of ex vivo apoptosis might provide new important information concerning the biology and prognosis of CLL.
Keywords
CLL; ex vivo apoptosis; CMXRos
About this articleTitle
Analysis of ex vivo Apoptosis of B and T cells from Peripheral Blood and Bone Marrow of Patients with Chronic Lymphocytic Leukemia
Journal
Issue
Pages
336-341
Published online
2012-10-01
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86
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86
DOI
10.1016/S0001-5814(12)70005-1
Bibliographic record
Acta Haematol Pol 2012;43(4):336-341.
Keywords
CLL
ex vivo apoptosis
CMXRos
Authors
Agnieszka Bojarska-Junak
Iwona Hus
Karolina Olszewska-Bożek
Sylwia Chocholska
Ewa Wąsik-Szczepanek
Waldemar Tomczak
Justyna Miłczak
Anna Dmoszyńska
Jacek Roliński