» Articles » PMID: 21473868

Serum Response Factor-dependent MicroRNAs Regulate Gastrointestinal Smooth Muscle Cell Phenotypes

Overview
Specialty Gastroenterology
Date 2011 Apr 9
PMID 21473868
Citations 38
Authors
Affiliations
Soon will be listed here.
Abstract

Background & Aims: Smooth muscle cells (SMCs) change phenotypes under various pathophysiological conditions. These changes are largely controlled by the serum response factor (SRF), a transcription factor that binds to CC (A/T)6 GG (CArG) boxes in SM contractile genes. MicroRNAs (miRNA) regulate transitions among SMC phenotypes. The SMC miRNA transcriptome (SMC miRNAome) and its regulation by SRF have not been determined.

Methods: We performed massively parallel sequencing to identify gastrointestinal (GI) SMC miRNA transcriptomes in mice and humans. SMC miRNA transcriptomes were mapped to identify all CArG boxes, which were confirmed by SRF knockdown and microarrays. Quantitative polymerase chain reaction was used to identify SMC-phenotypic miRNAs in differentiated and proliferating SMCs. Bioinformatics and target validation analysis showed regulation of SMC phenotype by SRF-dependent, SMC-phenotype miRNAs.

Results: We cloned and identified GI miRNA transcriptomes using genome-wide analyses of mouse and human cells. The SM miRNAome consisted of hundreds of unique miRNAs that were highly conserved among both species. We mapped miRNAs CArG boxes and found that many had an SRF-dependent signature in the SM miRNAome. The SM miRNAs CArG boxes had several distinct features. We also identified approximately 100 SMC-phenotypic miRNAs that were induced in differentiated or proliferative SMC phenotypes. We showed that SRF-dependent, SMC-phenotypic miRNAs bind and regulate Srf and its cofactors, myocadin (Myocd) and member of ETS oncogene family Elk1.

Conclusions: The GI SMC phenotypes are controlled by SRF-dependent, SMC-phenotypic miRNAs that regulate expression of SRF, MYOCD, and ELK1.

Citing Articles

SRF SUMOylation modulates smooth muscle phenotypic switch and vascular remodeling.

Xu Y, Zhang H, Chen Y, Pober J, Zhou M, Zhou J Nat Commun. 2024; 15(1):6919.

PMID: 39134547 PMC: 11319592. DOI: 10.1038/s41467-024-51350-5.


miR-10b-5p rescues leaky gut linked with gastrointestinal dysmotility and diabetes.

Zogg H, Singh R, Ha S, Wang Z, Jin B, Ha M United European Gastroenterol J. 2023; 11(8):750-766.

PMID: 37723933 PMC: 10576606. DOI: 10.1002/ueg2.12463.


Functional Implications and Clinical Potential of MicroRNAs in Irritable Bowel Syndrome: A Concise Review.

Bravo-Vazquez L, Medina-Rios I, Marquez-Gallardo L, Reyes-Munoz J, Serrano-Cano F, Pathak S Dig Dis Sci. 2022; 68(1):38-53.

PMID: 35507132 PMC: 9066399. DOI: 10.1007/s10620-022-07516-6.


Role of microRNAs in Disorders of Gut-Brain Interactions: Clinical Insights and Therapeutic Alternatives.

Singh R, Zogg H, Ro S J Pers Med. 2021; 11(10).

PMID: 34683162 PMC: 8541612. DOI: 10.3390/jpm11101021.


Micro-organic basis of functional gastrointestinal (GI) disorders: Role of microRNAs in GI pacemaking cells.

Singh R, Wei L, Ghoshal U Indian J Gastroenterol. 2021; 40(2):102-110.

PMID: 33738768 DOI: 10.1007/s12664-021-01159-7.


References
1.
Xie C, Huang H, Sun X, Guo Y, Hamblin M, Ritchie R . MicroRNA-1 regulates smooth muscle cell differentiation by repressing Kruppel-like factor 4. Stem Cells Dev. 2010; 20(2):205-10. PMC: 3128754. DOI: 10.1089/scd.2010.0283. View

2.
Miano J . Serum response factor: toggling between disparate programs of gene expression. J Mol Cell Cardiol. 2003; 35(6):577-93. DOI: 10.1016/s0022-2828(03)00110-x. View

3.
Rothman A, Kulik T, Taubman M, Berk B, Smith C, Nadal-Ginard B . Development and characterization of a cloned rat pulmonary arterial smooth muscle cell line that maintains differentiated properties through multiple subcultures. Circulation. 1992; 86(6):1977-86. DOI: 10.1161/01.cir.86.6.1977. View

4.
Kent W, Sugnet C, Furey T, Roskin K, Pringle T, Zahler A . The human genome browser at UCSC. Genome Res. 2002; 12(6):996-1006. PMC: 186604. DOI: 10.1101/gr.229102. View

5.
Lewis B, Burge C, Bartel D . Conserved seed pairing, often flanked by adenosines, indicates that thousands of human genes are microRNA targets. Cell. 2005; 120(1):15-20. DOI: 10.1016/j.cell.2004.12.035. View