scholarly journals The influence of transforming growth factor β, epidermal growth factor and insulin on DNA biosynthesis in mouse fibroblasts of swiss-3T3 line grown in monolayer cultures with low and high cell density

1992 ◽  
Vol 8 (4) ◽  
pp. 39-43 ◽  
Author(s):  
R. S. Stoika ◽  
S. I. Sushelnitsky ◽  
S. I. Kusen'
Keyword(s):  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Transforming Growth Factor Beta ◽  
Transforming Growth Factor ◽  
High Cell Density ◽  
High Cell ◽  
Dna Biosynthesis ◽  
Monolayer Cultures ◽  
Epidermal Growth ◽  
Growth Factor Beta

Interaction of epidermal growth factor and transforming growth factor beta in human prostatic epithelial cells in culture

The Prostate ◽  
1992 ◽  
Vol 21 (2) ◽  
pp. 133-143 ◽  
Author(s):  
Debra M. Sutkowski ◽  
Chau-Jye Fong ◽  
Julia A. Sensibar ◽  
Alfred W. Rademaker ◽  
Edward R. Sherwood ◽  
...  
Keyword(s):  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Epithelial Cells ◽  
Transforming Growth Factor Beta ◽  
Transforming Growth Factor ◽  
Cells In Culture ◽  
Epidermal Growth ◽  
Growth Factor Beta

Transcriptional modulation of transin gene expression by epidermal growth factor and transforming growth factor beta

1988 ◽  
Vol 8 (6) ◽  
pp. 2479-2483
Author(s):  
C M Machida ◽  
L L Muldoon ◽  
K D Rodland ◽  
B E Magun
Keyword(s):  
Gene Expression ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Transforming Growth Factor Beta ◽  
Transforming Growth Factor ◽  
Prolonged Treatment ◽  
Transcriptional Level ◽  
Tgf Beta ◽  
Epidermal Growth ◽  
Growth Factor Beta

Transin is a transformation-associated gene which is expressed constitutively in rat fibroblasts transformed by a variety of oncogenes and in malignant mouse skin carcinomas but not benign papillomas or normal skin. It has been demonstrated that, in nontransformed Rat-1 cells, transin RNA expression is modulated positively by epidermal growth factor (EGF) and negatively by transforming growth factor beta (TGF-beta); other peptide growth factors were found to have no effect on transin expression. Results presented here indicate that both protein synthesis and continuous occupancy of the EGF receptor by EGF were required for sustained induction of transin RNA. Treatment with TGF-beta inhibited the ability of EGF to induce transin, whether assayed at the transcriptional level by nuclear run-on analysis or at the level of transin RNA accumulation by Northern (RNA) blot analysis of cellular RNA. TGF-beta both blocked initial induction of transin transcription by EGF and halted established production of transin transcripts during prolonged treatment. These results suggest that TGF-beta acts at the transcriptional level to antagonize EGF-mediated induction of transin gene expression.

scholarly journals The Effect of Alpha-Tocopherol on the Expression of Epidermal Growth Factor Receptor and Transforming Growth Factor Beta Genes in Three Developmental Stages of Echinococcus granulosus

2020 ◽  
Author(s):  
Seyyed Jafar NOSRATABADI ◽  
Nasim HAYATI ROODBARI ◽  
Mohammad Hossein MODARRESI ◽  
Alireza FARSINEJAD ◽  
Majid FASIHI HARANDI
Keyword(s):  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Transforming Growth Factor Beta ◽  
Growth And Development ◽  
Transforming Growth Factor ◽  
Developmental Stages ◽  
Alpha Tocopherol ◽  
Tgf Beta ◽  
Epidermal Growth ◽  
Growth Factor Beta

Background: In recent decades platyhelminths have been used as model organisms to address some of the fundamental questions related to the growth and development of animal organisms. Epidermal Growth Factor Receptors (EGFR) and Transforming Growth Factor beta (TGF-beta) have a regulatory role in the growth and development of Echinococcus species. This study determined the effect of alpha-tocopherol on the expression of EGFR and TGF-beta genes in three in vitro developmental stages of E. granulosus. Methods: E. granulosus protoscoleces were cultured in diphasic medium containing bovine serum and CMRL 1066. Three developmental stages of E. granulosus, i.e. invaginated protoscoleces, evaginated protoscoleces and three-proglottid worms, were treated by alphatocopherol (250 μg/ml for 36 h) and the expression of EGFR and TGF-beta genes were evaluated by using qPCR analysis. Results: Intact protoscoleces were successfully developed to the segmented worms in diphasic culture media. Higher levels of both EGFR and TGF-beta gene expression were observed in the invaginated protoscoleces as well as the segmented worms in comparison to the non-treated controls. Conclusion: Administration of alpha-tocopherol to different developmental stages of E. granulosus significantly enhanced EGFR and TGF-beta expression in the parasite. Both oxidant and non-oxidant activities of alpha-tocopherol could explain the study findings. Overexpression of the genes could in turn enhance growth factor effects and facilitates the viability of the parasite.

A Study of Burns for Wound Ageing reveals Changes in Unburnt Skin with Implications for Future Research

2005 ◽  
Vol 45 (3) ◽  
pp. 205-210 ◽  
Author(s):  
Neil E I Langlois ◽  
Sarah Tarran ◽  
Peter Dziewulski
Keyword(s):  
Epidermal Growth Factor Receptor ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Transforming Growth Factor Beta ◽  
Transforming Growth Factor ◽  
Growth Factor Receptor ◽  
Burn Wounds ◽  
Epidermal Growth ◽  
Growth Factor Beta ◽  
Mib 1

Thirty-three punch biopsy sets of burn wound edge and adjacent unburnt skin from burn wounds aged six hours to 23 days were obtained from 18 patients. Immunohistochemical staining was performed for transforming growth factor beta receptor, epidermal growth factor receptor and MIB-1 (which stains the cell cycle associated antigen ki-67) in addition to integrins alpha V, 5 and 3 to assess for temporal patterns that might assist in the ageing of burn wounds. There was an early (12 hr-4 day) rise in integrin alpha V expression, an increasing expression of transforming growth factor beta receptor from 12 hours onwards, and increased expression of MIB-1 commencing at 2 days. In biopsy samples from the edge of the burn there was a trend for an early (6 hr-4 day) rise in epidermal growth factor receptor expression. There were no discernable changes in integrin alpha 5 or 3. The striking feature was that biopsy samples from the adjacent, unburnt skin showed similar temporal staining patterns. A further study would be required to determine if the effect was generalised or local, but the observation of changes in unburnt tissue implies that careful consideration must be given to selecting control tissue.

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