scholarly journals The transcription factor early growth response factor-1 (EGR-1) promotes apoptosis of neuroblastoma cells

2003 ◽  
Vol 373 (3) ◽  
pp. 739-746 ◽  
Author(s):  
Miguel PIGNATELLI ◽  
Rosario LUNA-MEDINA ◽  
Arturo PÉREZ-RENDÓN ◽  
Angel SANTOS ◽  
Ana PEREZ-CASTILLO
Keyword(s):  
Growth Response ◽  
P53 Protein ◽  
Early Growth ◽  
Early Gene ◽  
Terminal Deoxynucleotidyl Transferase ◽  
Response Factor ◽  
P53 Family ◽  
Early Growth Response ◽  
In Cells

Early growth response factor-1 (EGR-1) is an immediate early gene, which is rapidly activated in quiescent cells by mitogens or in postmitotic neurons after depolarization. EGR-1 has been involved in diverse biological functions such as cell growth, differentiation and apoptosis. Here we report that enforced expression of the EGR-1 gene induces apoptosis, as determined by flow cytometry and terminal deoxynucleotidyl transferase-mediated dUTP-fluorescein nick-end labelling (TUNEL) analysis, in murine Neuro2A cells. In accordance with this role of EGR-1 in cell death, antisense oligonucleotides increase cell viability in cells cultured in the absence of serum. This apoptotic activity of the EGR-1 appears to be mediated by p73, a member of the p53 family of proteins, since an increase in the amount of p73 is observed in clones stably expressing the EGR-1 protein. We also observed an increase in the transcriptional activity of the mdm2 promoter in cells overexpressing EGR-1, which is paralleled by a marked decrease in the levels of p53 protein, therefore excluding a role of this protein in mediating EGR-1-induced apoptosis. Our results suggest that EGR-1 is an important factor involved in neuronal apoptosis.

The Role of Early Growth Response 1 in the Prognostic Value and Cell Migration of Breast Cancer

2021 ◽  
Author(s):  
Leiyu Hao ◽  
Fengru Huang ◽  
Xinqian Yu ◽  
Bujie Xu ◽  
Yan Liu ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cell Migration ◽  
Protein Expression ◽  
Prognostic Value ◽  
Growth Response ◽  
Expression Patterns ◽  
Early Growth ◽  
The Cancer Genome Atlas ◽  
Early Growth Response

Abstract Background: Early growth response family members (EGRs), EGR1-4, have increasingly attracted attention in multiple cancers. However, the exact expression patterns and prognostic values of EGRs in the progress of breast cancer (BRCA) remain largely unknown. Methods: The mRNA expression and prognostic characteristics of EGRs were examined by the Cancer Genome Atlas (TCGA), Oncomine and Kaplan-Meier plotter. Enrichment analyses were conducted based on protein-protein interaction (PPI) network. The Tumor Immune Estimation Resource (TIMER) database and MethSurv were further explored. The protein expression level of EGR1 and cell migration were measured by Western blotting, immunohistochemistry, wound-healing assay and Boyden chamber assay in BRCA. Results: The transcriptional levels of EGR1/2/3 displayed significantly low expression in BRCA compared to that in normal tissues, while EGR4 was shown adverse expression pattern. Survival analysis revealed up-regulated EGR1-4 were remarkably associated with favorable relapse-free survival (RFS). A close correlation with specific tumor-infiltrating immune cells (TIICs) and several CpG sites of EGRs were exhibited. Immunohistochemistry assays showed that the protein expression of EGR1 was remarkably downregulated in BRCA compared to that in paracancerous tissues. Cell migration of MCF10A cells was increased after the silence of EGR1 by siRNA transfection.Conclusions: This study provides a novel insight to the role of EGR1 in the prognostic value and cell migration of BRCA.

scholarly journals Catalytic Oligodeoxynucleotides Define a Key Regulatory Role for Early Growth Response Factor-1 in the Porcine Model of Coronary In-Stent Restenosis

2001 ◽  
Vol 89 (8) ◽  
pp. 670-677 ◽  
Author(s):  
Harry C. Lowe ◽  
Roger G. Fahmy ◽  
Mary M. Kavurma ◽  
Andrew Baker ◽  
Colin N. Chesterman ◽  
...  
Keyword(s):  
Growth Response ◽  
Porcine Model ◽  
Early Growth ◽  
Regulatory Role ◽  
Response Factor ◽  
Early Growth Response ◽  
Stent Restenosis ◽  
In Stent Restenosis

scholarly journals Involvement of Early Growth Response Factor Egr-1 in Apolipoprotein AI Gene Transcription

1995 ◽  
Vol 270 (12) ◽  
pp. 7004-7010 ◽  
Author(s):  
Edward J. Kilbourne ◽  
Russell Widom ◽  
Douglas C. Harnish ◽  
Sohail Malik ◽  
Sotirios K. Karathanasis
Keyword(s):  
Gene Transcription ◽  
Growth Response ◽  
Early Growth ◽  
Response Factor ◽  
Apolipoprotein Ai ◽  
Early Growth Response
Sign in / Sign up

Export Citation Format

Share Document