Association between the apoptotic effect of Cabazitaxel and its pro-oxidant efficacy on the redox adaptation mechanisms in prostate cancer cells with different resistance phenotypes
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
View abstract on PubMed
Summary
This summary is machine-generated.Redox adaptation in prostate cancer cells reduces Cabazitaxel efficacy by altering oxidative stress responses. Targeting redox adaptation may improve treatment outcomes for aggressive prostate cancer.
Area Of Science
- Oncology
- Cell Biology
- Biochemistry
Background
- Redox adaptation confers resistance to oxidative stress in cancer cells.
- Prostate cancer (PC) cells with redox adaptation exhibit reduced sensitivity to Cabazitaxel (Cab), a key drug for metastatic castration-resistant PC (mCRPC).
Purpose Of The Study
- To investigate the association between Cabazitaxel's apoptotic and pro-oxidant effects and redox adaptation in PC cells with varying phenotypes.
- To explore the role of redox adaptation in modulating drug sensitivity and survival pathways in prostate cancer.
Main Methods
- Utilized LNCaP (mPC), LNCaP-HPR (oxidative stress-resistant mPC), C4-2 (mCRPC), and RWPE-1 (normal prostate epithelial) cells.
- Assessed Cabazitaxel's effects on reactive oxygen species (ROS) generation, mitochondrial damage, and key redox-sensitive proteins (p-Nrf2, HIF-1α, p-NF-κB).
- Evaluated cytotoxic and apoptotic effects of Cabazitaxel across different cell lines.
Main Results
- Cabazitaxel demonstrated pro-oxidant and apoptotic effects proportional to its efficacy, more pronounced in less aggressive LNCaP cells.
- Reduced pro-oxidant and apoptotic effects were observed in redox-adapted LNCaP-HPR and C4-2 cells, indicating decreased drug sensitivity.
- Cabazitaxel increased p-NF-κB activation in aggressive PC cells, suggesting a role in survival under increased ROS.
- RWPE-1 cells showed less sensitivity to Cabazitaxel's cytotoxic effects compared to LNCaP, but exhibited altered pro-oxidant responses.
Conclusions
- Cabazitaxel's efficacy is variable and influenced by cellular redox adaptation and phenotype.
- Altered regulation of redox adaptation in aggressive PC cells diminishes Cabazitaxel's pro-oxidant and apoptotic impact.
- Targeting redox-sensitive proteins and pathways could enhance Cabazitaxel's therapeutic effect in advanced prostate cancer.
Contact us if these videos are not relevant.
Contact us if these videos are not relevant.
Related Concept Videos
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
Cancer cells accumulate genetic changes at an abnormally rapid rate due to the defects in the DNA repair mechanisms. From an evolutionary perspective, such genetic instability is advantageous for cancer development. Mutant cell lines accumulate a series of beneficial mutations that contribute to their progression into cancer.
Some of the advantages that cancer cells have on normal cells include - enhanced ability to divide without terminally differentiating, induce new blood vessel formation,...
Combining two or more treatment methods increases the life span of cancer patients while reducing damage to vital organs or tissue from the overuse of a single treatment. Combination therapy also targets different cancer-inducing pathways, thus reducing the chances of developing resistance to treatment.
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
Internal cellular stress, such as cellular injury or hypoxia, triggers intrinsic apoptosis. The B-cell lymphoma 2 (Bcl-2) family of proteins are the primary regulators of the intrinsic apoptotic pathway. For example, during DNA damage, checkpoint proteins, such as Ataxia Telangiectasia Mutated (ATM protein) and Checkpoints Factor-2 (Chk2) proteins, are activated. These proteins phosphorylate p53 which further activates pro-apoptotic proteins, such as Bax, Bak, PUMA, and Noxa, and inhibits...
Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...