Small molecules have been discovered the can target cancer by the following pathways. Question 23 options: Activating p53 Inhibiting Bcr-Abl Activating BCL-2 Inhibiting BCL-2
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- p53 is a tumor suppressor protein that helps prevent cancer by inducing cell cycle arrest or apoptosis in damaged cells. Activating p53 can promote the death of cancer cells. - Bcr-Abl is an abnormal fusion protein with tyrosine kinase activity found in certain Show more…
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2. A current focus of molecular medicine is to trigger or prevent apoptosis in specific cells. Several components of the apoptotic pathway are being targeted using this approach. For each of the following, state specifically how the treatment would be expected to stimulate or inhibit apoptosis. a. Cells are treated with a small molecule called pifithrin-α, which was originally isolated for its ability to reversibly block p53-dependent transcriptional activation. b. Exposing cells to recombinant TRAIL protein, a ligand for the tumor necrosis factor family of receptors.
Adi S.
The ATM-p53 repair pathway is a crucial mechanism for maintaining genomic stability in both normal cells and cancerous cells. ATM (ataxia-telangiectasia mutated) is a protein kinase that plays a key role in detecting DNA damage and initiating the appropriate cellular response. In normal cells, when DNA damage occurs, ATM is activated and phosphorylates the tumor suppressor protein p53. This phosphorylation event stabilizes p53 and allows it to accumulate in the nucleus, where it can activate the transcription of genes involved in DNA repair, cell cycle arrest, or apoptosis. In the context of cancerous cells, the ATM-p53 repair pathway can be dysregulated or impaired. Mutations in the ATM gene or alterations in the p53 pathway can lead to the loss of proper DNA damage response and repair mechanisms. This can result in genomic instability and the accumulation of additional mutations, contributing to the development and progression of cancer. Furthermore, cancer cells may exhibit defects in the downstream effectors of the ATM-p53 pathway, such as the genes involved in DNA repair or cell cycle regulation. These defects can further compromise the ability of cancer cells to repair DNA damage and maintain genomic stability. Understanding the ATM-p53 repair pathway in both normal and cancerous cells is crucial for developing targeted therapies that can exploit the vulnerabilities of cancer cells while sparing normal cells. By selectively targeting the dysregulated components of the ATM-p53 pathway, it may be possible to enhance the efficacy of cancer treatments and minimize side effects.
Describe the nature of p53 reactivation as a cancer-fighting strategy.
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