Related Experiment Video
Updated: Aug 6, 2026
04:56
Detection of Aggregation-Prone Behavior in Mutant P53 V157F Breast Cancer Cells Using Multipoint Thioflavin T Fluorescence
Published on: December 30, 2025
TP53 Amplification, a Rare but Recurrent Alteration in Myeloid Neoplasms
Anna Stengel1, Manja Meggendorfer1, Torsten Haferlach1
1MLL Munich Leukemia Laboratory, Munich, Germany.
Genes, Chromosomes & Cancer
|July 21, 2026
Summary
TP53 amplification, though rare in blood cancers, often occurs with TP53 mutations in myeloid neoplasms. This combination suggests complete TP53 gene inactivation, leading to poor prognosis and extreme genomic instability.
Area of Science:
- Oncology
- Genetics
- Hematology
Background:
- The TP53 tumor suppressor gene is crucial for genomic stability and frequently altered in human cancers.
- TP53 alterations (mutations, deletions) in hematologic malignancies correlate with poor prognosis and therapy resistance.
- TP53 amplifications have not been systematically studied in the context of hematologic malignancies.
Purpose of the Study:
- To investigate the occurrence and characteristics of TP53 amplifications in myeloid neoplasms.
- To analyze the clinical and genomic implications of TP53 amplification in these cancers.
Main Methods:
- Retrospective analysis of cases with suspected TP53 amplification using interphase FISH.
- Karyotyping and targeted sequencing for genomic characterization.
- Whole-transcriptome sequencing to assess TP53 gene expression.
Main Results:
- Eight cases of TP53 amplification were identified, all within myeloid neoplasms (6 AML, 2 MDS).
- All cases showed complex karyotypes and concurrent TP53 mutations.
- TP53 amplification did not lead to significant overexpression; median overall survival for AML cases was 1 month.
Conclusions:
- TP53 amplification is a rare but recurrent event in myeloid neoplasms, invariably associated with TP53 mutation and complex cytogenetics.
- The combined mutation and amplification likely result in biallelic TP53 inactivation, contributing to extreme genomic instability and adverse outcomes.
- TP53 copy number assessment may have diagnostic value, but its role in risk stratification needs further investigation.
Related Concept Videos
02:23Abnormal Proliferation
Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the daughter...
02:21Cancers Originate from Somatic Mutations in a Single Cell
Cancer arises from mutations in the critical genes that allow healthy cells to escape cell cycle regulation and acquire the ability to proliferate indefinitely. Though originating from a single mutation event in one of the originator cells, cancer progresses when the mutant cell lines continue to gain more and more mutations, and finally, become malignant. For example, chronic myelogenous leukemia (CML) develops initially as a non-lethal increase in white blood cells, which progressively...
01:05Cancer-Critical Genes II: Tumor Suppressor Genes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
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...
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...
03:18Non-LTR Retrotransposons
As the name suggests, non-LTR retrotransposons lack the long terminal repeats characteristic of the LTR retrotransposons. Additionally, both LTR and non-LTR retrotransposons use distinct mechanisms of mobilization. Non-LTR retrotransposons are further divided into two classes - Long interspersed nuclear elements (LINEs) and short interspersed nuclear elements (SINEs), both of which occur abundantly in most mammals, including humans. Some of the active non-LTR retrotransposons in humans are L1...