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Table of Contents
Vol. 62, No. 4, 2002
Issue release date: July 2002
Section title: Laboratory/Clinical Translational Research
Oncology 2002;62:305–312
(DOI:10.1159/000065061)

Prognostic Value of Multidrug Resistance 1, Glutathione-S-Transferase-π and p53 in Advanced Nasopharyngeal Carcinoma Treated with Systemic Chemotherapy

Hsu C.H.a,e · Chen C.L.b,d · Hong R.L.a,e · Chen K.L.a,e · Lin J.F.a,e · Cheng A.-L.a,c,e
Departments of aOncology, bPathology and cInternal Medicine, National Taiwan University Hospital, Taipei, dDepartment of Pathology, China Medical College Hospital, Taichung, and eCancer Research Center, National Taiwan University College of Medicine, Taipei, Taiwan, ROC

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Article / Publication Details

First-Page Preview
Abstract of Laboratory/Clinical Translational Research

Published online: July 04, 2002
Issue release date: July 2002

Number of Print Pages: 8
Number of Figures: 2
Number of Tables: 4

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

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

Abstract

Objective: Nasopharyngeal carcinoma (NPC) is one of the dominant cancers in South China and Taiwan. Although NPC is highly chemosensitive, the use of chemotherapy for treating patients with recurrent or metastatic NPC has not been very successful. The emergence of drug resistance may be one of the major reasons. However, the mechanisms of drug resistance of NPC have never been addressed before. In this study, we sought to clarify the role of classical drug resistance markers in predicting the chemosensitivity and the prognosis of patients with advanced NPC. Methods: In a cohort of 202 consecutive patients diagnosed at the Department of Pathology of the National Taiwan University Hospital, 44 patients with adequately preserved pretreatment tumor tissues and complete clinical information regarding the details of chemotherapy and tumor response were identified. The expression of multidrug resistance (MDR1), glutathione-S-transferase-π (GSTπ), and p53 were determined by immunohistochemistry. Tumor response to chemotherapy and survival of the patients were the endpoints of this analysis. Results: Thirty-four patients received cisplatin-based regimens, and 28 of them were enrolled in a prospective trial using a doxorubicin-containing regimen. The overall response rate was 70%. Expression of MDR1 was seen in only 5 cases (11%) and was associated with a significantly worse overall survival, yet did not appear to predict chemoresistance to the doxorubicin-containing regimen. Overexpression of p53 was seen in 22 patients, and surprisingly, was correlated with chemoresponse and a trend towards better survival. GSTπ expression was demonstrated in 13 cases (30%) and was not correlated with chemoresistance to cisplatin-containing regimens and overall survival. Conclusion: In this relatively small cohort, positive MDR1 immunostaining predicted a poor overall survival for recurrent or metastatic NPC patients receiving chemotherapy. Overexpression of p53 by immunohistochemical staining, however, was associated with a better response rate to systemic chemotherapy and a trend towards better survival.

© 2002 S. Karger AG, Basel


Article / Publication Details

First-Page Preview
Abstract of Laboratory/Clinical Translational Research

Published online: July 04, 2002
Issue release date: July 2002

Number of Print Pages: 8
Number of Figures: 2
Number of Tables: 4

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

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


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Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher or, in the case of photocopying, direct payment of a specified fee to the Copyright Clearance Center.
Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug.
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