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Screening for novel human genes associated with CRE pathway activation with cell microarray
Linjie Tian1, Pingzhang Wang, Jinhai Guo
1Chinese National Human Genome Center, Beijing, 3-707 North YongChang Road BDA, Beijing 100176, People's Republic of China.
Abstract:
In this study, cell microarray technology is used to identify novel human genes associated with CRE pathway activation. By reverse transfection, expression plasmids containing full-length cDNAs were cotransfected with the reporter plasmid pCRE-d2EGFP to monitor the activation of the CRE pathway via enhanced green fluorescence protein (EGFP) expression. Of the 575 predominantly novel genes screened, 22 exhibited relatively higher EGFP fluorescence compared with a negative control. After a functional validation with a dual luciferase reporter system that included both cis- and trans-luciferase assays, 4 of the 22 genes (RNF41, C8orf32, C6orf208, and MEIS3P1) were confirmed as CRE-pathway activators. Western blot analysis revealed that RNF41 can promote CREB phosphorylation. These results demonstrate the successful combination of cell microarray technology with this reporting system and the potential of this tool to characterize functions of novel genes in a highly parallel format.
Insights
Researchers identified novel human genes activating the cAMP response element (CRE) pathway using cell microarray technology. Four genes, including RNF41, were confirmed as CRE pathway activators, with RNF41 promoting CREB phosphorylation.
Area of Science:
- Molecular Biology
- Genomics
- Cell Biology
Background:
- The cAMP response element (CRE) pathway is crucial in cellular signaling.
- Identifying novel genes that regulate this pathway is essential for understanding cellular functions.
Purpose of the Study:
- To discover novel human genes involved in CRE pathway activation.
- To validate the utility of cell microarray technology for high-throughput functional screening of genes.
Main Methods:
- Cell microarray technology was employed for high-throughput screening of 575 novel genes.
- Reporter gene assays (pCRE-d2EGFP) monitored CRE pathway activation.
- Dual luciferase reporter systems were used for functional validation.
- Western blot analysis confirmed protein-level effects (CREB phosphorylation).
Main Results:
- 22 out of 575 screened genes showed potential CRE pathway activation.
- Four genes (RNF41, C8orf32, C6orf208, MEIS3P1) were confirmed as CRE pathway activators.
- RNF41 was shown to promote CREB phosphorylation, a key event in the CRE pathway.
Conclusions:
- Cell microarray technology combined with a reporter system is effective for identifying novel gene functions.
- This approach enables parallel characterization of gene functions, particularly in signaling pathways.
- The identified genes, especially RNF41, offer new insights into CRE pathway regulation.
