ArticleCancer biology & therapy2009
Chemotherapeutic sensitization by endoplasmic reticulum stress: increasing the efficacy of taxane against prostate cancer.
Article in Cancer biology & therapy, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
31 citing papers in PubMed, 50 citations in OpenAlex.
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Corrections and comments
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Authors and funding
3 authors at 1 institution in 1 country.
Funding
Abstract
Taxanes are first line drugs for treating prostate cancer recurrence after the failure of anti-androgen therapy. There is a need to make taxanes more effective since they only provide palliative benefit. Exploiting endoplasmic reticulum (ER) stress death signaling to enhance drug efficacy has not been delineated. Human PC-3 cells were used as a model of hormone refractory prostate cancer. Thapsigargin and methylseleninic acid (MSA) were examined as sensitizers. Thapsigargin is a classic ER stress inducer. The activity of MSA in inducing ER stress has recently been studied by our group. The efficacy of single drug and the various combinations was evaluated by measuring apoptosis with a cell death ELISA kit. Thapsigargin increased the cell killing potency of paclitaxel or docetaxel by 10- to 12-fold, while MSA caused a 5- to 8-fold increase. Since thapsigargin is not used clinically because of its toxicity, the follow-up experiments were done with MSA. To test the hypothesis that a threshold level of ER stress is crucial to chemotherapeutic sensitization, three different approaches designed to dampen the severity of ER stress induced by MSA were examined. Lowering ER stress consistently attenuated the efficacy of MSA/taxane. GADD153 is a pro-apoptotic transcription factor which is upregulated during ER stress. Knocking down GADD153 by siRNA also reduced the cell killing effect of MSA/taxane. Both the intrinsic and extrinsic apoptotic pathways were involved in the sensitization mechanism. Our study supports the idea that marshalling ER stress apoptotic response is conducive to chemotherapeutic sensitization.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.