Related Experiment Videos
Identification of novel cAMP responsive element modulator (CREM) isoforms expressed by osteoblasts
1Department of Medicine, University of Connecticut Health Center, 263 Farmington Avenue, Farmington, CT 06030, USA.
Calcified Tissue International
|August 2, 2005
Summary
Cyclic adenosine monophosphate (cAMP) responsive element modulator (CREM) gene expression in osteoblasts involves numerous transcripts. Researchers identified 15 CREM transcripts from the P1 promoter, including novel isoforms with unique exon combinations.
Area of Science:
- Molecular biology
- Genetics
- Cell biology
Background:
- CREM is a transcription factor regulating cAMP-responsive genes.
- CREM isoforms are generated through alternative splicing and multiple promoters.
- Previous work identified CREM P2 promoter products (ICER) in osteoblasts.
Purpose of the Study:
- To investigate CREM transcript diversity in osteoblasts.
- To identify novel CREM isoforms originating from the P1 promoter.
Main Methods:
- Analysis of CREM gene expression in osteoblasts.
- Identification and characterization of CREM mRNA transcripts.
- Investigation of alternative splicing patterns.
Main Results:
- Osteoblasts express at least 15 CREM transcripts from the P1 promoter.
- Seven novel CREM transcripts resulting from alternative splicing were identified.
- A new CREM isoform, CREM-X, was found to contain previously undescribed exons (theta1 and L).
Conclusions:
- Osteoblasts exhibit extensive CREM transcript diversity.
- Alternative splicing of CREM in osteoblasts generates novel isoforms.
- These findings expand the understanding of CREM regulation in bone cells.