Analysis of human leukaemias and lymphomas using extensive immunophenotypes from an antibody microarray

Authors: Belov, Larissa¹; Mulligan, Stephen P.; Barber, Nicole²; Woolfson, Adrian³; Scott, Mike⁴; Stoner, Kerryn⁴; Chrisp, Jeremy S.¹; Sewell, William A.⁵; Bradstock, Kenneth F.⁶; Bendall, Linda⁶; Pascovici, Dana S.⁷; Thomas, Mervyn⁷; Erber, Wendy⁴; Huang, Pauline¹; Sartor, Mary⁶; Young, Graham A.R.⁸; Wiley, James S.⁹; Juneja, Surender¹⁰; Wierda, William G.¹¹; Green, Anthony R.⁴; Keating, Michael J.¹¹; Christopherson, Richard I.²

Source: British Journal of Haematology, Volume 135, Number 2, October 2006 , pp. 184-197(14)

Publisher: Blackwell Publishing

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Abstract:

Summary

A novel antibody microarray has been developed that provides an extensive immunophenotype of leukaemia cells. The assay is a solid phase cell-capture technique in which 82 antigens are studied simultaneously. This paper presents the analysis of 733 patients with a variety of leukaemias and lymphomas from peripheral blood and bone marrow. Discriminant Function Analysis of the expression profiles from these 733 patients and 63 normal subjects were clustered and showed high levels of consistency with diagnoses obtained using conventional clinical and laboratory criteria. The overall levels of consensus for classification using the microarray compared with established criteria were 93·9% (495/527 patients) for peripheral blood and 97·6% (201/206 patients) for bone marrow aspirates, showing that the extensive phenotype alone was frequently able to classify the disease when the leukaemic clone was the dominant cell population present. Immunophenotypes for neoplastic cells were distinguishable from normal cells when the leukaemic cell count was at least 5 × 10⁹ cells/l in peripheral blood, or 20% of cells obtained from bone marrow aspirates. This technique may be a useful adjunct to flow cytometry and other methods when an extensive phenotype of the leukaemia cell is desired for clinical trials, research and prognostic factor analysis.

Keywords: leukaemia; CD antigens; immunophenotype; expression profile; array

Document Type: Research article

DOI: 10.1111/j.1365-2141.2006.06266.x

Affiliations: 1: Medsaic Pty Ltd, Suite 145, level1, National Innovation Centre, Australian Technology Park, Garden Street, Eveleigh, Australia 2: School of Molecular and Microbial Biosciences, University of Sydney, Sydney, NSW, Australia 3: Addenbrooke's Hospital, University of Cambridge School of Clinical Medicine, Cambridge, UK 4: Department of Haematology, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK 5: Institute of Laboratory Medicine, St Vincent's Hospital Sydney, Darlinghurst, NSW, Australia 6: Westmead Millennium Institute, University of Sydney, Westmead, NSW, Australia 7: Emphron Informatics Pty Ltd, Chapel Hill, Qld, Australia 8: Kanematsu Research Laboratories, University of Sydney, NSW, Australia 9: Department of Medicine, Nepean Hospital, Penrith, NSW, Australia 10: Diagnostic Haematology, Melbourne Health Shared Pathology Service, Royal Melbourne Hospital, Parkville, Victoria, Australia 11: MD Anderson Cancer Center, Houston, TX, USA

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