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Updated: Nov 27, 2025
Mosaic Zebrafish Transgenesis for Functional Genomic Analysis of Candidate Cooperative Genes in Tumor Pathogenesis
Published on: March 31, 2015
Stepwise crosstalk between aberrant Nf1, Tp53 and Rb signalling pathways induces gliomagenesis in zebrafish
Juanjuan Luo1,2, Pei Liu1, Chunjiao Lu1
1Neuroscience Center, Shantou University Medical College, Shantou 515041, China.
Abstract:
The molecular pathogenesis of glioblastoma indicates that RTK/Ras/PI3K, RB and TP53 pathways are critical for human gliomagenesis. Here, several transgenic zebrafish lines with single or multiple deletions of nf1, tp53 and rb1 in astrocytes, were established to genetically induce gliomagenesis in zebrafish. In the mutant with a single deletion, we found only the nf1 mutation low-efficiently induced tumour incidence, suggesting that the Nf1 pathway is critical for the initiation of gliomagenesis in zebrafish. Combination of mutations, nf1;tp53 and rb1;tp53 combined knockout fish, showed much higher tumour incidences, high-grade histology, increased invasiveness, and shortened survival time. Further bioinformatics analyses demonstrated the alterations in RTK/Ras/PI3K, cell cycle, and focal adhesion pathways, induced by abrogated nf1, tp53, or rb1, were probably the critical stepwise biological events for the initiation and development of gliomagenesis in zebrafish. Gene expression profiling and histological analyses showed the tumours derived from zebrafish have significant similarities to the subgroups of human gliomas. Furthermore, temozolomide treatment effectively suppressed gliomagenesis in these glioma zebrafish models, and the histological responses in temozolomide-treated zebrafish were similar to those observed in clinically treated glioma patients. Thus, our findings will offer a potential tool for genetically investigating gliomagenesis and screening potential targeted anti-tumour compounds for glioma treatment.
Insights
The Nf1 pathway is crucial for initiating glioblastoma in zebrafish. Combining mutations in Nf1, Tp53, and Rb1 significantly increased tumor development and invasiveness, offering new models for glioma research.
Area of Science:
- Oncology
- Genetics
- Developmental Biology
Background:
- Glioblastoma pathogenesis involves critical RTK/Ras/PI3K, RB, and TP53 pathways.
- Understanding gliomagenesis initiation and progression is vital for effective treatment strategies.
Purpose of the Study:
- To establish and characterize transgenic zebrafish models for studying gliomagenesis.
- To investigate the roles of Nf1, Tp53, and Rb1 in glioma initiation and development.
- To evaluate the efficacy of temozolomide in zebrafish glioma models.
Main Methods:
- Generation of transgenic zebrafish with single or multiple gene deletions (nf1, tp53, rb1) in astrocytes.
- Induction of gliomagenesis through genetic manipulation.
- Bioinformatics and gene expression profiling for pathway analysis.
- Histological analysis of tumor development and invasiveness.
- Assessment of temozolomide treatment response.
Main Results:
- Single nf1 mutation showed low-efficient tumor induction, highlighting its critical role in gliomagenesis initiation.
- Combined nf1;tp53 and rb1;tp53 mutations led to higher tumor incidence, advanced histology, increased invasiveness, and reduced survival.
- Alterations in RTK/Ras/PI3K, cell cycle, and focal adhesion pathways were identified as key events.
- Zebrafish-derived tumors exhibited similarities to human glioma subgroups.
- Temozolomide effectively suppressed gliomagenesis in these models, mirroring clinical responses.
Conclusions:
- Nf1 pathway is critical for gliomagenesis initiation in zebrafish.
- Combined genetic mutations accelerate glioma development and progression.
- Zebrafish models accurately recapitulate human glioma characteristics and treatment responses.
- These models serve as valuable tools for gliomagenesis research and anti-cancer drug screening.
