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Targeted agents in AML: much more to do
1Adult Leukemia Program, Dana Farber Cancer Institute and Harvard Medical School, 44 Binney Street, D 840 Boston, MA 02115, USA. rstone@partners.org
Abstract:
To what degree has targeted therapy succeeded in acute myeloid leukemia (AML)? Targeted therapy has become a buzzword, with its meaning lost from overuse. In chronic myeloid leukemia (CML), gastrointestinal stromal cell tumor, and a small subset of patients with non-small cell lung cancer, a validated target has been identified and a highly specific therapeutic agent has been developed. Targeted therapy generally requires a pathophysiological Achilles heel in a tumor that can be exploited by nontoxic therapy. In most cases, the validated target has been a tyrosine kinase enzyme critical for tumor growth and survival. Are similar "drugable" targets available in AML? While our understanding of the pathophysiology of AML has advanced over the past decade, and some potential targets have been identified, no single agent will likely produce a significant proportion of remissions. On the other hand, nascent attempts with mild success have been achieved, yielding hope that this strategy will bear real fruit in the future.
Insights
Targeted therapy shows limited success in acute myeloid leukemia (AML) compared to other cancers. While potential targets exist, current treatments offer modest results, with future hope for improved outcomes in AML therapy.
Area of Science:
- Hematology
- Oncology
- Pharmacology
Background:
- Targeted therapy has revolutionized cancer treatment in diseases like CML and GIST.
- Its success relies on identifying specific molecular targets crucial for tumor survival.
- Acute myeloid leukemia (AML) presents a complex challenge for targeted approaches.
Purpose of the Study:
- To evaluate the effectiveness of targeted therapy in acute myeloid leukemia (AML).
- To identify "drugable" molecular targets within AML pathophysiology.
- To assess the potential for future targeted treatment strategies in AML.
Main Methods:
- Review of current understanding of AML pathophysiology.
- Analysis of identified molecular targets in AML.
- Comparison of targeted therapy success rates across different cancers.
Main Results:
- Unlike CML and GIST, AML lacks a single validated "Achilles heel" target for current therapies.
- Potential molecular targets have been identified, but no single agent yields significant remission rates.
- Early attempts show modest success, indicating potential for future development.
Conclusions:
- Targeted therapy in AML has not yet achieved the success seen in other malignancies.
- Further research into AML-specific targets is crucial for developing effective treatments.
- Nascent successes offer hope for future advancements in AML targeted therapy.
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