Clinical significance of bone marrow micrometastasis detected by nested rt-PCR for keratin-19 in breast cancer patients.

Abstract:

PURPOSE:Breast cancers in the early phase frequently undergo distant metastasis and survival of patients is greatly dependent on distant metastasis. The occurrence of micrometastasis has been suggested to relate with prognostic features of breast cancer, such as lymph node metastasis and the presence of vascular invasion. The aim of this study was to examine the presence of keratin-19 mRNA of epithelial tumors in bone marrow aspirates obtained from breast cancer patients and its possible correlation with tumor staging and disease-free survival. METHODS:Bone marrow samples were obtained from 59 breast cancer patients at the time of surgery. We separated the mononuclear fraction from the samples and carried out nested reverse transcriptase polymerase chain reaction (RT-PCR) for the detection of keratin-19 mRNA with two different pairs of primers. After operation, the patients were followed up at 3-month intervals. We studied the possible correlation of the detection of keratin-19 mRNA with tumor size, nodal involvement, stage and recurrence rate. RESULTS:Bone marrow micrometastasis was detected by nested RT-PCR for keratin-19 mRNA in one of four patients with ductal carcinoma in situ (DCIS), 13 of 30 patients with T1, 11 of 20 patients with T2 and all four patients with T3 lesion. Recurrence was observed in seven cases and all of them were positive for micrometastasis in bone marrow. CONCLUSION:The method of nested RT-PCR to detect the presence of keratin-19 mRNA in bone marrow from patients with breast cancer is sensitive and reliable. Moreover, early recurrence was observed in the patients with the tumor mRNA detected in bone marrow. Additional studies with larger numbers of patients and longer follow-up are desirable.

journal_name

Jpn J Clin Oncol

authors

Jung YS,Lee KJ,Kim HJ,Yim HE,Park JS,Soh EY,Kim MW,Park HB

doi

10.1093/jjco/hyg038

keywords:

subject

Has Abstract

pub_date

2003-04-01 00:00:00

pages

167-72

issue

4

eissn

0368-2811

issn

1465-3621

journal_volume

33

pub_type

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