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[Isolation and identification of cDNA sequence differentially expressed in human lung carcinoma]
Hai-long Xie1, You-jun Li, Zhu-chu Chen
1Laboratory of Tumor Cell Biology, Cancer Research Institute, Xiangya Medical School, Central South University, Changsha 410078, P. R. China.
Background & Objective:
The molecular mechanism of the pathogenesis of lung carcinoma is unclear; because key genes related to lung carcinoma have not been identified. This study was designed to isolate and identify differentially expressed cDNA sequences in human lung carcinoma for cloning lung carcinoma-related genes.
Method:
Using mRNA differential display method combined with cloning and reserve Northern dot blot and sequencing and RT-PCR, differentially expressed cDNA sequences were isolated between two lung cancer cell lines, two adult lung carcinoma tissue and paired normal tissue of trachea epithelia.
Result:
Sixteen differentially expressed cDNA fragments were isolated, subsequent cloning of sixteen differentially expressed cDNA fragments were confirmed by reverse Northern dot blot and sequencing and BLAST analysis. Two of these were shown to be novel gene sequences that had not been reported. Eight of the remaining cDNA sequences homologize to known genes; additionally two differentially expressed cDNA sequences were confirmed by RT-PCR.
Conclusion:
Using mRNA differentially display, The authors had successfully isolated ten differentially expressed cDNA sequences from human lung carcinoma, these cDNA sequences might be involved in the pathogenesis of lung carcinoma.
Insights
Researchers identified ten differentially expressed cDNA sequences in human lung carcinoma using mRNA differential display. These novel gene sequences may play a role in lung cancer development.
Area of Science:
- Molecular Biology
- Genomics
- Cancer Research
Context:
- The molecular mechanisms underlying lung carcinoma pathogenesis remain largely unknown.
- Identifying key genes involved in lung cancer is crucial for understanding its development.
Purpose:
- To isolate and identify differentially expressed cDNA sequences in human lung carcinoma.
- To clone potential lung carcinoma-related genes for further study.
Summary:
- This study employed mRNA differential display, cloning, reverse Northern dot blot, sequencing, and RT-PCR.
- Sixteen differentially expressed cDNA fragments were isolated from lung cancer cell lines and tissues.
- Ten sequences, including two novel ones, were confirmed and may be implicated in lung carcinoma pathogenesis.
Impact:
- Successfully identified ten differentially expressed cDNA sequences in human lung carcinoma.
- Provides potential candidate genes for further investigation into lung cancer molecular mechanisms.
- Contributes to the ongoing effort to uncover the genetic basis of lung cancer.