Fludarabine and Cladribine Induce Changes in Surface Proteins on Human B-Lymphoid Cell Lines Involved with Apoptosis, Cell Survival, and Antitumor Immunity

被引:8
作者
Kohnke, Philippa L. [1 ]
Mactier, Swetlana [1 ]
Almazi, Juhura G. [1 ]
Crossett, Ben [1 ]
Christopherson, Richard I. [1 ]
机构
[1] Univ Sydney, Sch Mol Biosci, Sydney, NSW 2006, Australia
关键词
plasma membrane; N-linked glycoproteins; hydrazide coupling; cladribine; fludarabine; lymphoma; leukemia; iTRAQ; CHRONIC LYMPHOCYTIC-LEUKEMIA; RECEPTOR-INDUCED APOPTOSIS; PURINE NUCLEOSIDE ANALOGS; N-LINKED GLYCOPROTEINS; MASS-SPECTROMETRY; MEMBRANE PROTEOMICS; ANTIGEN PRESENTATION; T-LYMPHOCYTES; CANCER-CELLS; TUMOR-CELLS;
D O I
10.1021/pr300079c
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
Fludarabine and cladribine are purine analogues used to treat hematological malignancies. Alone or in combination with therapeutic antibodies, they are effective in treating patients with chronic lymphocytic leukemia and non-Hodgkin's lymphoma. However, the mechanisms of action of these drugs are not well understood. Plasma membrane proteins perform a variety of essential functions that can be affected by malignancy and perturbed by chemotherapy. Analysis of surface proteins may contribute to an understanding of the mechanisms of action of purine analogues and identify biomarkers for targeted therapy. The surface of human cells is rich in N-linked glycoproteins, enabling use of a hydrazide-coupling technique to enrich for glycoproteins, with iTRAQ labeling for quantitative comparison. A number of plasma membrane proteins on human leukemia and lymphoma cells were affected by treatment with a purine analogue, including decreases in CD22 (an adhesion and signaling molecule) and increases in CD205 (a "damaged cell marker") and CD80 and CD50 (T-cell interaction molecules). Purine analogues may affect B-cell receptor (BCR) signaling and costimulatory molecules, leading to multiple signals for apoptosis and cell clearance. Fludarabine and cladribine induce differential effects, with some cell survival proteins (ECE-1 and CD 100) more abundant after fludarabine treatment. Cell surface proteins induced by fludarabine and cladribine may be targets for therapeutic antibodies.
引用
收藏
页码:4436 / 4448
页数:13
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