Heparin Binding Epidermal Growth Factor-like Growth Factor Is a Transforming Growth Factor β-Regulated Gene in Intestinal Epithelial Cells

1999 ◽  
Vol 264 (3) ◽  
pp. 808-812 ◽  
Author(s):  
Nada Bulus ◽  
John A. Barnard
Keyword(s):  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Epithelial Cells ◽  
Transforming Growth Factor ◽  
Intestinal Epithelial Cells ◽  
Transforming Growth Factor Β ◽  
Intestinal Epithelial ◽  
Heparin Binding ◽  
Epidermal Growth

Epidermal growth factor and interleukin-1β synergistically stimulate the production of nitric oxide in rat intestinal epithelial cells

2004 ◽  
Vol 287 (6) ◽  
pp. G1188-G1193 ◽  
Author(s):  
Katsuhiko Kitagawa ◽  
Yoshinori Hamada ◽  
Yasunori Kato ◽  
Koji Nakai ◽  
Mikio Nishizawa ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Epithelial Cells ◽  
Intestinal Epithelial Cells ◽  
Pi3 Kinase ◽  
Intestinal Epithelial ◽  
Simultaneous Addition ◽  
Epidermal Growth ◽  
Inos Induction

Epidermal growth factor (EGF) is one of the trophic factors for intestinal adaptation after small bowel transplantation (SBT). A recent report indicates that nitric oxide (NO) has cytoprotective effects on bacterial translocation (BT) after SBT. We hypothesized that EGF stimulates the expression of the inducible NO synthase (iNOS) gene in the graft after SBT, followed by increased production of NO, resulting in the decrease of BT. Intestinal epithelial cells (IEC)-6 were treated with EGF and/or IL-1β in the presence and absence of phosphatidylinositol 3-kinase (PI3-kinase) and EGF receptor kinase inhibitors (LY-294002 and tyrphostin A25). The induction of NO production and iNOS and its signal molecules, including the inhibitory protein of NF-κB (IκB), NF-κB, and Akt, were analyzed. IL-1β stimulated the degradation of IκB and the activation of NF-κB but had no effect on iNOS induction. EGF, which had no effect on the NF-κB activation and iNOS induction, stimulated the upregulation of type 1 IL-1 receptor (IL-1R1) through PI3-kinase/Akt. Simultaneous addition of EGF and IL-1β stimulated synergistically the induction of iNOS, leading to the increased production of NO. Our results indicate that EGF and IL-1β stimulate two essential signals for iNOS induction in IEC-6 cells: the upregulation of IL-1R1 through PI3-kinase/Akt and the activation of NF-κB through IκB kinase, respectively. Simultaneous addition of EGF and IL-1β can enhance the production of NO, which may contribute to the cytoprotective effect of EGF against intestinal injury.

scholarly journals Contemporary concepts of uterine fibroids’ pathogenesis

2019 ◽  
Vol 10 (1) ◽  
pp. 91-99
Author(s):  
Anna N. Taits ◽  
Nikolai N. Ruhljada ◽  
Valeriy I. Matukhin ◽  
Aleksandra D. Somova ◽  
Kristina A. Dudova
Keyword(s):  
Growth Factors ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Transforming Growth Factor ◽  
Uterine Fibroids ◽  
Transforming Growth Factor Β ◽  
Reproductive Age ◽  
Heparin Binding ◽  
Common Benign Tumor ◽  
Epidermal Growth

Uterine myoma is the most common benign tumor among women which affects mainly those of reproductive age. Moreover, the frequency of emergence of this pathology in population is growing while the age of patients is steadily decreasing. Despite the enormous prevalence of this disease, its pathogenesis has not been studied properly. This article is concerned with an analysis of publications devoted to the study of the mechanisms of growth and development of uterine fibroids, it provides some data on the role of various factors in its extension. The article concerns the most popular concepts of the pathogenesis of this disease according to which the illness may be caused by increased levels of sex hormones (estrogens and progestins), enhanced expression of their receptors, impaired apoptosis, the effect of growth factors (e. g. epidermal growth factor, heparin-binding epidermal growth factor, acid and basic fibroblast growth factors, vascular endothelial growth factor, insulin-like growth factor, platelet-derived growth factor, transforming growth factor-β, activin, myostatin), abnormal deposition extracellular matrix, genetic (chromosomal aberration and various MED12 gene defect) and epigenetic mechanisms (such as action microRNA), circulatory disorders and impairment of cell differentiation from a population of accessory stem cells. However, it is noted that the pathogenesis of this pathology requires further detailed study, as the understanding of the processes leading to its development could greatly contribute to the improvement of the tactics of treatment and possibly allow to elaborate some preventive measures to avert the development of fibroids.

Free fucose is a danger signal to human intestinal epithelial cells

2008 ◽  
Vol 99 (3) ◽  
pp. 449-454 ◽  
Author(s):  
Wai Ling Chow ◽  
Yuan Kun Lee
Keyword(s):  
Growth Factor ◽  
Epithelial Cells ◽  
Transforming Growth Factor ◽  
Intestinal Epithelial Cells ◽  
Direct Interaction ◽  
Transforming Growth Factor Β ◽  
Intestinal Lumen ◽  
Mucosal Barrier ◽  
Intestinal Epithelial ◽  
Regulated Gene Expression

Fucose is present in foods, and it is a major component of human mucin glycoproteins and glycolipids.l-Fucose can also be found at the terminal position of many cell-surface oligosaccharide ligands that mediate cell-recognition and adhesion-signalling pathways. Mucin fucose can be released through the hydrolytic activity of pathogens and indigenous bacteria, leading to the release of free fucose into the intestinal lumen. The immunomodulating effects of free fucose on intestinal epithelial cells (enterocyte-like Caco-2) were investigated. It was found that the presence ofl-fucose up regulated genes and secretion of their encoded proteins that are involved in both the innate and adaptive immune responses, possibly via the toll-like receptor-2 signalling pathway. These include TNFSF5, TNFSF7, TNF-α, IL12, IL17 and IL18.Besides modulating immune reactions in differentiated Caco-2 cells, fucose induced a set of cytokine genes that are involved in the development and proliferation of immune cells. These include the bone morphogenetic proteins (BMP) BMP2, BMP4, IL5, thrombopoietin and erythropoietin. In addition, the up regulated gene expression of fibroblast growth factor-2 may help to promote epithelial cell restitution in conjunction with the enhanced expression of transforming growth factor-β mRNA. Since the exogenous fucose was not metabolised by the differentiated Caco-2 cells as a carbon source, the reactions elicited were suggested to be a result of the direct interaction of fucose and differentiated Caco-2 cells. The presence of free fucose may signal the invasion of mucin-hydrolysing microbial cells and breakage of the mucosal barrier. The intestinal epithelial cells respond by up regulation and secretion of cytokines, pre-empting the actual invasion of pathogens.

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