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Journal of Clinical Oncology, Vol 22, No 17 (September 1), 2004: pp. 3491-3497
© 2004 American Society of Clinical Oncology.
DOI: 10.1200/JCO.2004.10.087

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Nuclear Expression of BCL10 or Nuclear Factor Kappa B Predicts Helicobacter pylori–Independent Status of Early-Stage, High-Grade Gastric Mucosa-Associated Lymphoid Tissue Lymphomas

Sung-Hsin Kuo, Li-Tzong Chen, Kun-Huei Yeh, Ming-Shiang Wu, Hui-Chen Hsu, Pei-Yen Yeh, Tsui-Lien Mao, Chi-Long Chen, Shin-Lian Doong, Jaw-Town Lin, Ann-Lii Cheng

From the Departments of Oncology, Internal Medicine, and Pathology, National Taiwan University Hospital and National Taiwan University College of Medicine; Cancer Research Center, Graduate Institute of Clinical Medicine, and Graduate Institute of Microbiology, National Taiwan University College of Medicine; Division of Cancer Research, National Health Research Institutes; Department of Pathology, Taipei Medical University, Taipei; and Department of Internal Medicine, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan

Address reprint requests to Ann-Lii Cheng, MD, PhD, Department of Internal Medicine and Department of Oncology, National Taiwan University Hospital, No. 7, Chung-Shan S Rd, Taipei, Taiwan; e-mail: andrew{at}ha.mc.ntu.edu.tw

PURPOSE: A high percentage of early-stage, high-grade gastric mucosa-associated lymphoid tissue (MALT) lymphomas remain Helicobacter pylori dependent. t(11;18)(q21;q21), a genetic aberration highly predictive of H pylori–independent status in low-grade gastric MALT lymphoma, is rarely detected in its high-grade counterpart. This study examined whether nuclear expression of BCL10 or nuclear factor kappa B (NF-{kappa}B) is useful in predicting H pylori–independent status in patients with stage IE high-grade gastric MALT lymphomas.

PATIENTS AND METHODS: Twenty-two patients who had participated in a prospective study of H pylori eradication for stage IE high-grade gastric MALT lymphomas were studied. The expression of BCL10 and NF-{kappa}B in pretreatment paraffin-embedded lymphoma tissues was evaluated by immunohistochemistry and confocal immunofluorescence microscopy. The presence of t(11;18)(q21;q21) was identified by a multiplex reverse transcriptase polymerase chain reaction of the API2-MALT1 chimeric transcript.

RESULTS: Aberrant nuclear expression of BCL10 was detected in seven (87.5%) of eight H pylori–independent and in none of 14 H pylori–dependent high-grade gastric MALT lymphomas (P < .001). All seven patients with nuclear BCL10 expression had nuclear expression of NF-{kappa}B, compared with only two of 15 patients without nuclear BCL10 expression (P = .002). As a single variable, the frequency of nuclear expression of NF-{kappa}B was also significantly higher in H pylori–independent tumors than in H pylori–dependent tumors (seven of eight [87.5%] v two of 15 [12.3%]; P = .002). The API2-MALT1 fusion transcript was detected in only one (12.5%) of eight H pylori–independent lymphomas.

CONCLUSION: Nuclear expression of BCL10 or NF-{kappa}B is highly predictive of H pylori–independent status in high-grade gastric MALT lymphoma, and coexpression of these two markers in the nuclei is frequent.

Supported by research grants NSC91-3112-B-002-009 from the National Science Council, NHRI-91A1-CANT-1 from the National Health Research Institutes, and NTUH 93-N012 from National Taiwan University Hospital, Taiwan.

S.-H.K. and L.-T.C. contributed equally to this work.

Authors' disclosures of potential conflicts of interest are found at the end of this article.


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