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Clinical Chemistry 50: 80-87, 2004. First published November 21, 2003; 10.1373/clinchem.2003.024695
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(Clinical Chemistry. 2004;50:80-87.)
© 2004 American Association for Clinical Chemistry, Inc.

Molecular Diagnostics and Genetics

Real-Time Quantitative Reverse Transcription-PCR for Cyclin D1 mRNA in Blood, Marrow, and Tissue Specimens for Diagnosis of Mantle Cell Lymphoma

John Greg Howe1, Jill Crouch1, Dennis Cooper2 and Brian R. Smith1,2,a

Departments of
1 Laboratory Medicine and
2 Internal Medicine, Yale University School of Medicine, 333 Cedar St., New Haven, CT 06520.

aAddress correspondence to this author at: Department of Laboratory Medicine, Yale University School of Medicine, 333 Cedar St., PO Box 208035, New Haven, CT 06520-8035. Fax 203-688-4111; e-mail brian.smith{at}yale.edu.

Background: Overexpression of cyclin D1 mRNA, found in mantle cell lymphoma (MCL), is a critical diagnostic marker. We investigated the use of real-time reverse transcription-PCR (RT-PCR) for cyclin D1.

Methods: We studied 97 fresh specimens (50 blood, 30 bone marrow, 15 lymph node, and 2 other samples) from patients diagnosed with a variety of lymphoproliferative diseases, including 25 cases of MCL. We used real-time quantitative RT-PCR to evaluate cyclin D1 mRNA expression. Because blood and marrow specimens may contain only a minority of potentially malignant cells (as opposed to most lymph nodes) and to increase sensitivity, we normalized the cyclin D1 mRNA concentrations to mRNA of a B-cell-specific marker, CD19, as well as to previously characterized ß2-microglobulin mRNA.

Results: In 16 of 21 cases of MCL with overt disease, the ratio of cyclin D1 mRNA to ß2-microglobulin mRNA was increased, but all 21 cases showed increased ratios of cyclin D1 mRNA to CD19 mRNA. Cyclin D1 mRNA was low or undetectable in various lymphoproliferative diseases, including cases of ambiguous immunophenotype. The mRNA ratios were stable over 3–7 days of sample storage.

Conclusion: Quantitative RT-PCR for cyclin D1 mRNA normalized to CD19 mRNA can be used in the diagnosis of MCL in blood, marrow, and tissue.




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