Simultaneous interruption of signal transduction and cell cycle regulatory pathways: implications for new approaches to the treatment of childhood leukemias.

Abstract:

:The last decade has witnessed the introduction of a large number of novel, molecularly targeted agents into the therapeutic armamentarium against diverse forms of cancer, including leukemia. Such agents include signal transduction, cell cycle, histone deacetylase, Hsp90, proteasome, and Bcl-2 family member inhibitors, among others. While most of these agents have been or are currently being evaluated in adult patients with acute leukemia, experience in childhood leukemia is very limited. Although the use of such targeted agents as potentiators of conventional cytotoxic agent activity represents a logical approach, an emerging body of evidence suggests that neoplastic cells in general, and leukemic cells in particular, are highly susceptible to a therapeutic strategy in which survival signaling and cell cycle regulatory pathways are simultaneously disrupted. In in vitro studies, highly synergistic antileukemic interactions have been reported between CDK and HDAC inhibitors; HDAC and proteasome inhibitors; Bcl-2 antagonists and CDK inhibitors; MEK/ERK and Chk1 inhibitors, and proteasome and CDK inhibitors, among other combinations. Some of these strategies, including combinations of HDAC and CDK inhibitors, and CDK and proteasome inhibitors, have now entered the clinical arena in patients with leukemia and other hematologic malignancies. Based upon preclinical results to date, there is reason to suspect that such strategies might prove to be active against several types of childhood leukemia. Thus, over the next decade, the introduction of molecularly targeted agents, alone and in combination, into the therapeutic armamentarium against childhood leukemia may have significant implications for children with this disease.

journal_name

Curr Drug Targets

journal_title

Current drug targets

authors

Grant S,Dent P

doi

10.2174/138945007780830764

subject

Has Abstract

pub_date

2007-06-01 00:00:00

pages

751-9

issue

6

eissn

1389-4501

issn

1873-5592

journal_volume

8

pub_type

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