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Arzneimittelforschung 2008; 58(6): 261-264
DOI: 10.1055/s-0031-1296504
Review
Editio Cantor Verlag Aulendorf (Germany)

Intrinsic and Acquired Drug Resistance in Malignant Tumors

The main reason for therapeutic failure
Theodor H Lippert
1   Medical Faculty, University of Tuebingen, Germany
,
Hans-Jörg Ruoff
1   Medical Faculty, University of Tuebingen, Germany
,
Manfred Volm
2   German Cancer Research Center, Heidelberg, Germany
› Author Affiliations
Further Information

Publication History

Publication Date:
15 December 2011 (online)

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Abstract

Drug resistance is the major reason for failure in cancer chemotherapy. Resistance may be either pre-existent (intrinsic resistance), or induced by drugs (acquired resistance).

So far, no strategy has been found to overcome resistance, which is based on highly complex and individually variable biological mechanisms. In present clinical practice, drug resistance can only be recognized during treatment, after long lag times. Thus diagnostic tests are required, indicating resistance at an earlier stage, in order to avoid unnecessary medication, frequently associated with toxic side-effects.

A number of new anti-cancer drugs are now available. In contrast to the unspecifically acting cytostatic chemotherapy, these compounds have targeted actions. However, as recent studies have shown, resistances and severe side-effects can also be found with targeted drugs.

With the increasing number of new treatment regimens, the early diagnosis of resistance will optimize therapy, and indeed will be indispensable for individual cancer therapy.

The resistance assays available for use in clinical practice should be integrated into cancer therapy. Research into this neglected area needs to be intensified.

Key words

Cancer drug therapy - Drug resistance, resistance mechanisms, resistance reversal - Individualised cancer therapy - Predictive tests
 

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