Related Experiment Video
Updated: Sep 5, 2025

Yeast As a Chassis for Developing Functional Assays to Study Human P53
Published on: August 4, 2019
p53 Isoforms as Cancer Biomarkers and Therapeutic Targets
1Department of Cell and Molecular Biology, Uppsala University, SE-75124 Uppsala, Sweden.
Abstract:
This review aims to summarize the implications of the major isoforms of the tumor suppressor protein p53 in aggressive cancer development. The current knowledge of p53 isoforms, their involvement in cell-signaling pathways, and their interactions with other cellular proteins or factors suggests the existence of an intricate molecular network that regulates their oncogenic function. Moreover, existing literature about the involvement of the p53 isoforms in various cancers leads to the proposition of therapeutic solutions by altering the cellular levels of the p53 isoforms. This review thus summarizes how the major p53 isoforms Δ40p53α/β/γ, Δ133p53α/β/γ, and Δ160p53α/β/γ might have clinical relevance in the diagnosis and effective treatments of cancer.
Insights
This review explores how p53 isoforms, such as Δ40p53, Δ133p53, and Δ160p53, impact aggressive cancer development and suggests therapeutic strategies targeting these variants for improved diagnosis and treatment.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Genetics
Background:
- The tumor suppressor protein p53 plays a critical role in preventing cancer.
- Aberrant expression and function of p53 isoforms are increasingly implicated in aggressive cancer.
- Understanding the complex network of p53 isoforms is crucial for cancer research.
Purpose of the Study:
- To review the implications of major p53 isoforms in aggressive cancer development.
- To elucidate the involvement of p53 isoforms in cell-signaling pathways and protein interactions.
- To explore the clinical relevance of p53 isoforms in cancer diagnosis and therapy.
Main Methods:
- Comprehensive literature review of existing studies on p53 isoforms.
- Analysis of p53 isoform involvement in various cancer types.
- Synthesis of current knowledge on p53 isoform function and regulation.
Main Results:
- Major p53 isoforms (Δ40p53, Δ133p53, Δ160p53) exhibit complex roles in cancer.
- These isoforms are involved in intricate molecular networks regulating oncogenic functions.
- Alterations in cellular levels of p53 isoforms are linked to cancer progression.
Conclusions:
- p53 isoforms have significant clinical relevance in cancer diagnosis.
- Targeting specific p53 isoforms offers potential therapeutic strategies for cancer treatment.
- Further research into p53 isoform networks may unlock novel cancer therapies.
Related Concept Videos
Abnormal Proliferation
Interactions Between Signaling Pathways
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Negative Regulator Molecules
DNA Damage can Stall the Cell Cycle
Targeted Cancer Therapies
There are several types of targeted therapies against...
Cancer-Critical Genes II: Tumor Suppressor Genes
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...

