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Updated: May 10, 2026
Co-immunoprecipitation Assay Using Endogenous Nuclear Proteins from Cells Cultured Under Hypoxic Conditions
Published on: August 2, 2018
Identification of novel hypoxia response genes in human glioma cell line a172
Fatemeh Baghbani1, Reza Raoofian, Mohammad Hasanzadeh Nazarabadi
1Department of Medical Genetics, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
Objective(S):
Hypoxia is a serious challenge for treatment of solid tumors. This condition has been manifested to exert significant therapeutic effects on glioblastoma multiform or (WHO) astrocytoma grade IV. Hypoxia contributes numerous changes in cellular mechanisms such as angiogenesis, metastasis and apoptosis evasion. Furthermore, in molecular level, hypoxia can cause induction of DNA breaks in tumor cells. Identification of mechanisms responsible for these effects can lead to designing more efficient therapeutic strategies against tumor progression which results in improvement of patient prognosis. Materials and Methods : In order to identify more hypoxia regulated genes which may have a role in glioblastoma progression, cDNA-AFLP was optimized as a Differential display method which is able to identify and isolate transcripts with no prior sequence knowledge.
Results:
Using this method, the current study identified 120 Transcription Derived Fragments (TDFs) which were completely differentially regulated in response to hypoxia. By sequence homology searching, the current study could detect 22 completely differentially regulated known genes and two unknown sequence matching with two chromosome contig and four sequence matches with some Expressed Sequence Tags (ESTs).
Conclusion:
Further characterizing of these genes may help to achieve better understanding of hypoxia mediated phenotype change in tumor cells.
Insights
Researchers identified 120 hypoxia-regulated genes in glioblastoma using cDNA-AFLP. This discovery aids in understanding tumor progression and developing targeted therapies for brain tumors.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Hypoxia presents a significant challenge in solid tumor treatment, particularly impacting glioblastoma (astrocytoma grade IV).
- Tumor hypoxia influences critical cellular processes including angiogenesis, metastasis, apoptosis evasion, and DNA damage.
- Understanding hypoxia-driven molecular mechanisms is crucial for developing effective anti-cancer strategies and improving patient outcomes.
Purpose of the Study:
- To identify novel hypoxia-regulated genes involved in glioblastoma progression.
- To establish cDNA-amplified fragment length polymorphism (AFLP) as a differential display method for transcript discovery without prior sequence knowledge.
Main Methods:
- Optimization of cDNA-amplified fragment length polymorphism (cDNA-AFLP) as a differential display technique.
- Application of cDNA-AFLP to identify transcripts differentially regulated by hypoxia in glioblastoma cells.
- Sequence homology searching to analyze identified transcripts.
Main Results:
- Identified 120 Transcription Derived Fragments (TDFs) exhibiting differential regulation in response to hypoxia.
- Detected 22 known genes and two unknown sequences with homology to chromosome contigs.
- Found four sequence matches to expressed sequence tags (ESTs), indicating novel gene discoveries.
Conclusions:
- The identified genes provide potential targets for understanding hypoxia-mediated phenotypic changes in tumor cells.
- Further characterization of these hypoxia-regulated genes may lead to improved therapeutic strategies for glioblastoma.
