[Cancer chemotherapy and apoptosis]
T Mashima1, M Naito, S Kataoka
1Institute of Molecular and Cellular Biosciences, University of Tokyo.
Nihon Rinsho. Japanese Journal of Clinical Medicine
|July 1, 1996
Summary
Chemotherapy triggers programmed cell death (apoptosis) in tumor cells via a common pathway. Resistance to this apoptosis may lead to multi-drug resistance, highlighting ICE/ced-3 proteases as potential therapeutic targets.
Area of Science:
- Biochemistry
- Molecular Biology
- Oncology
Context:
- Chemotherapeutic agents induce apoptotic cell death in tumor cells.
- Despite diverse cellular targets, these agents trigger a common cell death pattern, suggesting a shared apoptosis signaling pathway.
Purpose:
- To investigate the potential existence of a common apoptosis signaling pathway in tumor cells treated with chemotherapy.
- To explore the link between apoptosis resistance and multi-drug resistance in cancer.
Summary:
- Chemotherapy induces apoptosis, a form of programmed cell death, in tumor cells.
- The consistent induction of apoptosis suggests a conserved signaling cascade.
- Resistance to apoptosis could be a mechanism of multi-drug resistance in cancer.
- ICE/ced-3 family proteases are implicated in chemotherapy-induced apoptosis.
Impact:
- Understanding these pathways can identify novel therapeutic targets for cancer treatment.
- Targeting apoptosis pathways may overcome multi-drug resistance.
- This research opens new avenues for developing more effective cancer chemotherapy strategies.
Related Concept Videos
Cancer
Cancers arise due to mutations in genes involved in the regulation of cell division, which leads to unrestricted cell proliferation. Modern science and medicine have made great strides in the understanding and treatment of cancer, including eradicating cancer in some patients. However, there is still no cure for cancer. This is largely due to the fact that cancer is a large group of many diseases.
Cancer Therapies
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...
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...
Targeted Cancer Therapies
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against specific...
There are several types of targeted therapies against specific...
Combination Therapies and Personalized Medicine
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...
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...
The Intrinsic Apoptotic Pathway
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
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...
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...


