What question did this study set out to answer?

To determine the molecular mechanisms by which heat shock protein 90 (Hsp90) and its inhibitor 17-AAG regulate cellular tolerance to genotoxic stress through the Fanconi anemia pathway.

February 28, 2007BloodOpen Access

Hsp90 regulates the Fanconi anemia DNA damage response pathway

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Authors

TOTsukasa OdaGunma University THToshiya HayanoRitsumeikan University HMHidenobu MiyasoTokyo Medical University

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Implication

Experimental study demonstrates Hsp90 stabilizes FANCA in human cells, indicating Hsp90 inhibition sensitizes cells to genotoxic stress by disrupting Fanconi anemia repair.

Key Points

To determine the molecular mechanisms by which heat shock protein 90 (Hsp90) and its inhibitor 17-AAG regulate cellular tolerance to genotoxic stress through the Fanconi anemia pathway.
Assessed in vitro and in vivo physical interactions between Hsp90 and the Fanconi anemia core complex protein FANCA.
Evaluated FANCA intracellular turnover, subcellular localization, and downstream FANCD2 activation upon pharmacological Hsp90 inhibition using 17-AAG.
Measured DNA cross-linker-induced cytotoxicity and chromosomal aberrations in Fanconi anemia pathway-proficient versus pathway-deficient cells.
Hsp90 associates with FANCA in vivo and in vitro, establishing FANCA as a novel client protein sensitive to 17-AAG disruption.
Pharmacological inhibition of Hsp90 by 17-AAG induces rapid proteasomal degradation and cytoplasmic relocalization of FANCA, blocking activation of FANCD2.
17-AAG enhances DNA cross-linker-induced cytotoxicity and chromosomal aberrations in repair-competent cells, with significantly reduced sensitization in FA pathway-defective cells.

Cite This Study

Oda et al. (2007) studied this question.

synapsesocial.com/papers/6a844e58fc282ee53183d3f9 https://doi.org/10.1182/blood-2006-08-038638

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Implication

Experimental study demonstrates Hsp90 stabilizes FANCA in human cells, indicating Hsp90 inhibition sensitizes cells to genotoxic stress by disrupting Fanconi anemia repair.

Hsp90 regulates the Fanconi anemia DNA damage response pathway

Discussion

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Implication

Key Points

Cite This Study

Hsp90 regulates the Fanconi anemia DNA damage response pathway

Discussion

Member takes

Implication

Key Points

Cite This Study

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