Book contents
- Frontmatter
- Dedication
- Contents
- List of Contributors
- Preface
- Part 1.1 Analytical techniques: analysis of DNA
- Part 1.2 Analytical techniques: analysis of RNA
- Part 2.1 Molecular pathways underlying carcinogenesis: signal transduction
- Part 2.2 Molecular pathways underlying carcinogenesis: apoptosis
- Part 2.3 Molecular pathways underlying carcinogenesis: nuclear receptors
- Part 2.4 Molecular pathways underlying carcinogenesis: DNA repair
- Part 2.5 Molecular pathways underlying carcinogenesis: cell cycle
- Part 2.6 Molecular pathways underlying carcinogenesis: other pathways
- Part 3.1 Molecular pathology: carcinomas
- Part 3.2 Molecular pathology: cancers of the nervous system
- Part 3.3 Molecular pathology: cancers of the skin
- Part 3.4 Molecular pathology: endocrine cancers
- Part 3.5 Molecular pathology: adult sarcomas
- Part 3.6 Molecular pathology: lymphoma and leukemia
- 68 Molecular pathology of lymphoma
- 69 The molecular basis of acute myeloid leukemia
- 70 Molecular oncology of acute promyelocytic leukemia (APL)
- 71 Acute lymphoblastic leukemia (ALL)
- 72 B-cell chronic lymphocytic leukemia
- 73 Chronic myeloid leukemia: imatinib and next-generation ABL inhibitors
- 74 Multiple myeloma
- 75 EMS: the 8p11 myeloproliferative syndrome
- 76 JAK2 and myeloproliferative neoplasms
- Part 3.7 Molecular pathology: pediatric solid tumors
- Part 4 Pharmacologic targeting of oncogenic pathways
- Index
- References
71 - Acute lymphoblastic leukemia (ALL)
from Part 3.6 - Molecular pathology: lymphoma and leukemia
Published online by Cambridge University Press: 05 February 2015
- Frontmatter
- Dedication
- Contents
- List of Contributors
- Preface
- Part 1.1 Analytical techniques: analysis of DNA
- Part 1.2 Analytical techniques: analysis of RNA
- Part 2.1 Molecular pathways underlying carcinogenesis: signal transduction
- Part 2.2 Molecular pathways underlying carcinogenesis: apoptosis
- Part 2.3 Molecular pathways underlying carcinogenesis: nuclear receptors
- Part 2.4 Molecular pathways underlying carcinogenesis: DNA repair
- Part 2.5 Molecular pathways underlying carcinogenesis: cell cycle
- Part 2.6 Molecular pathways underlying carcinogenesis: other pathways
- Part 3.1 Molecular pathology: carcinomas
- Part 3.2 Molecular pathology: cancers of the nervous system
- Part 3.3 Molecular pathology: cancers of the skin
- Part 3.4 Molecular pathology: endocrine cancers
- Part 3.5 Molecular pathology: adult sarcomas
- Part 3.6 Molecular pathology: lymphoma and leukemia
- 68 Molecular pathology of lymphoma
- 69 The molecular basis of acute myeloid leukemia
- 70 Molecular oncology of acute promyelocytic leukemia (APL)
- 71 Acute lymphoblastic leukemia (ALL)
- 72 B-cell chronic lymphocytic leukemia
- 73 Chronic myeloid leukemia: imatinib and next-generation ABL inhibitors
- 74 Multiple myeloma
- 75 EMS: the 8p11 myeloproliferative syndrome
- 76 JAK2 and myeloproliferative neoplasms
- Part 3.7 Molecular pathology: pediatric solid tumors
- Part 4 Pharmacologic targeting of oncogenic pathways
- Index
- References
Summary
It is estimated that 5760 new cases of acute lymphoblastic leukemia (ALL) will be diagnosed in 2013 (including 3509 children younger than 20 years), and 1400 patients will die from this disease(1). Genetically, ALL is one of the better-characterized malignancies, and common recurrent abnormalities are recognized and integrated into the risk stratification.
BCR–ABL1
Approximately 20–30% of adult cases of ALL are associated with the reciprocal translocation t(9;22)(q34,q11), or Philadelphia chromosome (Ph; 2,3) This translocation results in a head-to-tail fusion of the ABL1 proto-oncogene on chromosome 9 to the 5ʹ half of the breakpoint cluster region (BCR) from chromosome 22. The resulting chimeric BCR–ABL1 gene is expressed as a 210 or 190 kDa protein. The p190 product is common in ALL, while the p210 is characteristic of chronic myeloid leukemia (4). The N-terminus of the ABL1 kinase is the “Cap” region, which binds to the kinase domain and keeps the Src-homology-2 (SH2) and SH3 autoinhibitory structure in place, thus displacing catalytic residues from the active site and diminishing ATP accessibility (i.e. “off state”; 5,6). In contrast, the chimeric BCR–ABL1 protein is a constitutive kinase that activates the RAS, PI3K/AKT, MEK/ERK, and c-Jun/N-terminal kinase (JNK) pathways, and up-regulates the anti-apoptotic Bcl-2 and Bcl-X, overall resulting in enhanced cell proliferation and survival (7–10).
- Type
- Chapter
- Information
- Molecular OncologyCauses of Cancer and Targets for Treatment, pp. 777 - 785Publisher: Cambridge University PressPrint publication year: 2013