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Tubulin Proteins in Cancer Resistance: A Review
Mohammad Amjad Kamal1, Maryam Hassan Al-Zahrani2, Salman Hasan Khan3
1Metabolomics and Enzymology Unit, Fundamental and Applied Biology Group, King Fahd Medical Research Center, King Abdulaziz University, Jeddah 21589, Saudi Arabia.
Abstract:
Cancer cells are altered with cell cycle genes or they are mutated, leading to a high rate of proliferation compared to normal cells. Alteration in these genes leads to mitosis dysregulation and becomes the basis of tumor progression and resistance to many drugs. The drugs which act on the cell cycle fail to arrest the process, making cancer cell non-responsive to apoptosis or cell death. Vinca alkaloids and taxanes fall in this category and are referred to as antimitotic agents. Microtubule proteins play an important role in mitosis during cell division as a target site for vinca alkaloids and taxanes. These proteins are dynamic in nature and are composed of α-β-tubulin heterodimers. β-tubulin specially βΙΙΙ isotype is generally altered in expression within cancerous cells. Initially, these drugs were very effective in the treatment of cancer but failed to show their desired action after initial chemotherapy. The present review highlights some of the important targets and their mechanism of resistance offered by cancer cells with new promising drugs from natural sources that can lead to the development of a new approach to chemotherapy.
Insights
Cancer cells resist chemotherapy by altering cell cycle genes, leading to drug resistance. This review explores resistance mechanisms and natural compounds for new chemotherapy strategies.
Area of Science:
- Oncology
- Cell Biology
- Pharmacology
Background:
- Cancer cells exhibit altered cell cycle genes or mutations, resulting in uncontrolled proliferation.
- Dysregulation of mitosis due to genetic alterations drives tumor progression and drug resistance.
- Antimitotic agents like vinca alkaloids and taxanes target microtubule proteins (α-β-tubulin heterodimers) crucial for cell division.
Purpose of the Study:
- To review key targets in cancer cells that confer resistance to antimitotic chemotherapy.
- To elucidate the mechanisms by which cancer cells develop resistance to established drugs.
- To highlight novel therapeutic agents from natural sources for overcoming chemotherapy resistance.
Main Methods:
- Literature review focusing on cell cycle regulation, mitosis, and drug resistance in cancer.
- Analysis of the role of β-tubulin isotypes, particularly βIII-tubulin, in cancer.
- Identification and evaluation of natural compounds with potential antimitotic or resistance-modulating activities.
Main Results:
- Alterations in cell cycle genes and βIII-tubulin expression are implicated in cancer's resistance to antimitotic drugs.
- Cancer cells develop resistance, rendering initial chemotherapy regimens ineffective over time.
- Natural sources offer promising compounds that may circumvent existing resistance mechanisms.
Conclusions:
- Understanding cancer cell resistance mechanisms is crucial for developing effective chemotherapy.
- Targeting specific tubulin isotypes and exploring natural compounds represent a promising avenue for novel cancer treatments.
- A new approach to chemotherapy integrating resistance modulation is needed to improve patient outcomes.
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