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Animal Model |

From the Department of Pathology,*
Beth Israel Deaconess
Medical Center and Harvard Medical School, Boston, Massachusetts; and
the Department of Pediatric Oncology,
Dana
Farber Cancer Institute, Boston, Massachusetts
To develop a model for the biology and treatment of CD30+
anaplastic large cell lymphoma (ALCL), we transplanted leukemic
tumor cells from a 22-month-old girl with multiple relapsed ALCL. Tumor
cells were inoculated intraperitoneally into a 4-week-old SCID/bg mouse
and produced a disseminated tumor within 8 weeks; this tumor was
serially transplanted by subcutaneous injections to other mice.
Morphology, immunohistochemistry, and molecular
genetics which demonstrated the NPM-ALK fusion protein,
resulting from the t(2;5)(p23;q35), confirmed the identity of
the xenograft with the original tumor. The tumor produced transcripts
for interleukin-1
, tumor necrosis factor-
, and
interferon-
which could explain the patient's B-symptoms. Treatment
of mice with monoclonal antibody (HeFi-1) which activates CD30 antigen
administered on day 1 after tumor transplantation prevented tumor
growth. Treatment with HeFi-1 after tumors had reached a 0.2
cm3 volume caused tumor growth arrest and prevention of
tumor dissemination. We conclude that transplantation of CD30+ ALCL to
SCID/bg mice may provide a valuable model for the study of the biology
and design of treatment modalities for CD30+ ALCL.
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