Anaplastic large-cell lymphoma (ALCL) is a distinct subtype of peripheral T-cell lymphomas harboring chromosomal translocations involving the ALK tyrosine kinase. ALCL represents about 10% of all childhood non-Hodgkin lymphoma (NHL). The t(2;5)(p23;q35) chromosomal aberration resulting in overexpression of a chimeric oncogene, nucleophosmin-anaplastic lymphoma kinase (NPM/ALK) is the most common translocation found in these tumors. The NPM/ALK protein plays a key role in ALCL lymphomagenesis and has been shown to cause lymphoid malignancy in vitro and in vivo. Although, the prognosis of localized childhood ALCL is excellent with 5 year survival ranging from 90-95%, children with advanced stage ALCL only have a 5 year survival of about 60% with late relapses are a common complication. Since 70% of children present with advanced disease, 25%-35% of all children with ALCL will relapse or become refractory to initial treatment. Biomarkers of ALCL that can be useful for diagnosis, early detection, prediction of biologic behavior and therapy are needed. Novel targeted therapies are needed for children with refractory/relapsed ALCL and for the subset of children with a poor prognosis at diagnosis. In this application, we propose to utilize a suite of quantitative mass spectrometry-based proteomics strategies supported by sophisticated bioinformatics approaches to identify proteomic biomarkers of NPM/ALK-positive lymphomas.
In specific aim 1, we will perform global quantitative proteomic analysis in an unbiased manner to identify the proteomic and phosphoproteomic changes associated with the expression of NPM/ALK in human lymphoid cells.
In specific aim 2, we will establish the functional relevance of selected components of the MS-derived NPM/ALK signaling pathways. Our long-term goal is to identify robust, sensitive and specific protein biomarkers for the detection of NPM/ALK-positive ALCLs. Our studies have implications for the identification of disease biomarkers for other forms of cancers characterized by ALK deregulation.

Public Health Relevance

Health-care impact. Children with advanced stage ALCL only have a 5 year event free survival of about 60% with late relapses as a common complication. Since 70% of children present with advanced disease, 25%-35% of all children with ALCL will relapse or become refractory to initial treatment. Biomarkers of ALCL that can be useful for diagnosis, early detection, prediction of biologic behavior and therapy are needed. In addition, novel targeted therapies are needed for children with refractory/relapsed ALCL and for the subset of children with a poor prognosis at diagnosis. In this application, we propose to utilize a suite of quantitative mass spectrometry-based proteomics strategies supported by sophisticated bioinformatics approaches to identify proteomic biomarkers of NPM/ALK-positive lymphomas. Our proposed studies offer an opportunity for the discovery of robust, sensitive biomarkers of ALCL. Collectively, our studies will lead to identification of protein biomarkers of NPM/ALK lymphomas that will be important for the diagnostic assessment, treatment and monitoring of patients with ALCL.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
5R01CA140806-03
Application #
8196784
Study Section
Cancer Biomarkers Study Section (CBSS)
Program Officer
Jessup, John M
Project Start
2009-12-03
Project End
2013-11-30
Budget Start
2011-12-01
Budget End
2012-11-30
Support Year
3
Fiscal Year
2012
Total Cost
$310,970
Indirect Cost
$109,695
Name
University of Michigan Ann Arbor
Department
Pathology
Type
Schools of Medicine
DUNS #
073133571
City
Ann Arbor
State
MI
Country
United States
Zip Code
48109
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