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Laboratory/Clinical Translational Research

Fine Needle Aspiration May Shed Breast Cells into Peripheral Blood as Determined by RT-PCR

Hu X.C. · Chow L.W.C.

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Department of Surgery, University of Hong Kong Medical Center, Queen Mary Hospital, Pokfulam, Hong Kong

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Oncology 2000;59:217–222

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Article / Publication Details

First-Page Preview
Abstract of Laboratory/Clinical Translational Research

Published online: October 02, 2000
Issue release date: September 2000

Number of Print Pages: 6
Number of Figures: 3
Number of Tables: 2

ISSN: 0030-2414 (Print)
eISSN: 1423-0232 (Online)

For additional information: https://www.karger.com/OCL

Abstract

Objective: A diagnostic test applying reverse-transcriptase chain reaction (RT-PCR) assay targeted against cytokeratin 19 (CK19), cytokeratin 20 (CK20) and the β-subunit of human chorionic gonadotropin (β-hCG) mRNAs was used to evaluate the impact of fine needle aspiration (FNA) on breast cell shedding into peripheral blood. Methods: The sensitivity of this assay was based on the different degree of admix of MCF-7 breast cancer cell line with HL-60 leukemic cell line. For blood samples of 24 cases with benign breast diseases and 20 cases with malignant ones, 5 ml of peripheral blood was drawn before and within 10 min after puncture. Total RNA was extracted from peripheral blood mononuclear (PBMN) cells; β-actin was used to assess the quality of cDNA. RT-PCR products were run in ethidium bromide gel and observed under ultraviolet. RT-PCR products for β-hCG were digested with Sty I endonuclease to confirm the specificity. Results: The sensitivity of RT-PCR assay was 1 MCF-7 cell in 105 HL-60 cells for CK19 and CK20, and 1 in 106 for β-hCG. For 24 benign cases, none of the pre- FNA samples was positive for CK20 and β-hCG, and 3 cases (12.5%) were positive for CK19. As for 20 malignant cases, 1 pre-FNA sample was positive for all three markers and 2 other samples were positive for CK19. After aspiration, 3/21 benign cases and 1/17 malignant case with pre-FNA negative signals became positive for CK19, while 3/19 malignant cases with pre-FNA negative signals were converted to a positive result for CK20 and β-hCG. Of 6 pre-FNA positive cases, all cases remained positive for the respective marker. Conclusion: FNA to breast tumor may cause hematogenous dissemination of breast cells.

© 2000 S. Karger AG, Basel


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Article / Publication Details

First-Page Preview
Abstract of Laboratory/Clinical Translational Research

Published online: October 02, 2000
Issue release date: September 2000

Number of Print Pages: 6
Number of Figures: 3
Number of Tables: 2

ISSN: 0030-2414 (Print)
eISSN: 1423-0232 (Online)

For additional information: https://www.karger.com/OCL


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