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Identification of novel tumor suppressor genes down-regulated in recurrent nasopharyngeal cancer by DNA microarray
Zhenxiao Huang1, Wenfeng Li2, Sen Lin1
1Department of Otolaryngology, The First Affiliated Hospital of Wenzhou Medical College, 2 Fuxue Road, Wenzhou, 32500 Zhejiang People's Republic of China.
Abstract:
The nasopharyngeal cancer is a common cancer among southern Chinese. In order to better understand molecular mechanism of recurrent nasopharyngeal cancer (rNPC), we used DNA microarray to identify down-regulated tumor suppressed genes (TSGs) in rNPC, and bioinformatics to analyze their chromosomal localizations and molecular functions. Eight non-recurrent nasopharyngeal cancer (nNPC) and six rNPC tissue samples were selected, and Affymetrix Gene1.0 ST chips were used to construct the expression profiling of each tissue sample. Identify the down-regulated TSGs in rNPC by comparing expression profiling data of two type tissue samples. A total of five TSGs were identified to be down-regulated in rNPC. These five TSGs include SERPINF1, TPD52L1, FBLN1, RASSF6, and S100A2, and Signal Log Ratio were -2.2, -2.3, -3.5, -3.9 and -6.9 respectively. Chromosomal localization analysis showed that S100A2, RASSF6, TPD52L1, SERPINF1, and FBLN1 were located on chromosomes 1q, 4q, 6q, 17p and 22q, respectively. Functional analysis showed that SERPINF1 and TPD52L1 belonged to enzyme activity genes, S100A2 and FBLN1 belonged to calcium ion binding genes, RASSF6 belong to protein binding genes. Five TSGs likely to be the candidate TSGs involved in rNPC, and may play important roles in occurrence of rNPC. Chromosomes 1q, 4q, 6q, 17p and 22q may be considered as important region for screening TSGs that may relevant to rNPC. Those genes and chromosomal region need to be further studied.
Insights
This study identified five down-regulated tumor suppressor genes (TSGs) in recurrent nasopharyngeal cancer (rNPC) using DNA microarray. These genes, located on specific chromosomes, may play key roles in rNPC development.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Nasopharyngeal cancer (NPC) is prevalent in southern China.
- Understanding the molecular mechanisms of recurrent NPC (rNPC) is crucial for targeted therapies.
- Tumor suppressor genes (TSGs) play a vital role in cancer development and progression.
Purpose of the Study:
- To identify down-regulated TSGs in rNPC tissues.
- To analyze the chromosomal localization and molecular functions of identified TSGs.
- To explore potential candidate TSGs and chromosomal regions involved in rNPC.
Main Methods:
- Gene expression profiling was performed on eight non-recurrent NPC (nNPC) and six rNPC tissue samples using Affymetrix Gene1.0 ST chips.
- DNA microarray data was analyzed to identify differentially expressed genes, specifically focusing on down-regulated TSGs in rNPC.
- Bioinformatic tools were employed for chromosomal localization and functional analysis of the identified TSGs.
Main Results:
- Five TSGs were found to be significantly down-regulated in rNPC: SERPINF1, TPD52L1, FBLN1, RASSF6, and S100A2.
- These genes are located on chromosomes 1q, 4q, 6q, 17p, and 22q.
- Functional analysis revealed that SERPINF1 and TPD52L1 are involved in enzyme activity, S100A2 and FBLN1 in calcium ion binding, and RASSF6 in protein binding.
Conclusions:
- The identified five TSGs are potential candidates involved in the molecular mechanisms of rNPC.
- Specific chromosomal regions (1q, 4q, 6q, 17p, and 22q) may harbor important TSGs relevant to rNPC.
- Further research is warranted to validate the role of these genes and chromosomal regions in rNPC development and progression.
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