Synergistic induction of apoptosis in B-cell chronic lymphocytic leukemia cells after treatment with all-trans retinoic acid in combination with interleukin-21 and rituximab.

Abstract:

AIM:B-cell chronic lymphocytic leukemia (B-CLL) is the most common adult leukemia in the Western world and characterized by the progressive expansion of malignant B lymphocytes in peripheral blood. In spite of advances in sciences to recognize the number of effective agents for the treatment of chronic lymphocytic leukemia (CLL), this leukemia is thought as incurable one. Introducing a new therapy that has a direct effect on B-CLL lymphocytes and no cytotoxic effects on the other cells is a great wish. MATERIALS AND METHODS:Twenty-one patients with B-CLL were enrolled in the study. Peripheral blood mononuclear cells (PBMCs) were isolated from patients' blood samples and were further treated with all-tans retinoic acid (ATRA), interleukin (IL-21), and rituximab at concentrations of 30 ng/ml, 25 ng/ml, and 4 μg/ml, respectively. ATRA, IL21, and rituximab were used alone or in various combinations and their effects on apoptosis were measured using annexin V-fluorescein isothiocyanate apoptosis detection kit. RESULT:Treatment of the patients' cells with IL21 and rituximab showed a synergistic effect on the induction of apoptosis, in comparison with untreated CLL cells (P < 0.05). The induction of apoptosis by ATRA in combination with IL21 and rituximab were significantly increased compared to untreated CLL cells as a negative control (P < 0.01). CONCLUSION:Treatment of patients' PBMCs by ATRA in combination with IL21 and rituximab and also IL21 in combination with rituximab showed synergistic induction of apoptosis compared to untreated CLL cells as a negative control (P < 0.01). It seems that ATRA in combination with IL21 and rituximab activate different pathways of apoptosis (extrinsic pathway, intrinsic pathway, and granzyme B pathway).

journal_name

J Cancer Res Ther

authors

Abbaszadeh-Goudarzi K,Shokri F,Hosseini M,Jadidi-Niaragh F,Ghalamfarsa G,Saboor-Yaraghi AA

doi

10.4103/0973-1482.184522

subject

Has Abstract

pub_date

2016-10-01 00:00:00

pages

1278-1283

issue

4

eissn

0973-1482

issn

1998-4138

pii

JCanResTher_2016_12_4_1278_184522

journal_volume

12

pub_type

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