Co-cultured Human Liver Epithelial Cells in Collagen Gel: A Source for Tissue Engineering in Vitro

1998 ◽  
pp. 135-142
Author(s):  
M. K. H. Auth ◽  
R. Joplin ◽  
R. Blaheta ◽  
A. Encke ◽  
P. McMaster ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Epithelial Cells ◽  
Human Liver ◽  
Collagen Gel ◽  
Liver Epithelial Cells

Effects of IL-1β, TNF-α, and TGF-β on Proliferation of Human Nasal Epithelial Cells in Vitro

1998 ◽  
Vol 12 (4) ◽  
pp. 279-282 ◽  
Author(s):  
Yang-Gi Min ◽  
Chae-Seo Rhee ◽  
Sam-Hyun Kwon ◽  
Kang Soo Lee ◽  
Ja Bock Yun
Keyword(s):  
Epithelial Cells ◽  
Collagen Gel ◽  
Time Dependent ◽  
Dependent Manner ◽  
Primary Cells ◽  
Nasal Epithelial Cells ◽  
Human Nasal Epithelial Cells ◽  
Tnf Α ◽  
Collagen Gel Matrix

Previous reports suggest that cytokines may be involved in proliferation of the epithelium. The aim of this study was to determine the effects of cytokines, IL-1β, TNF-α, and TGF-β on proliferation of human nasal epithelial cells (HNECs) in vitro. Primary cells were cultured from HNECs on collagen gel matrix. Subcultured HNECs were incubated in a medium with recombinant human (rh) cytokines, rhIL-1β, rhTNF-a, and rhTGF-β at different concentrations of 0.01 ng/mL, 0.1 ng/mL, 1 ng/mL, 10 ng/mL, and 100 ng/mL. After 2-day incubation with these cytokines, daily cell proliferation was measured by MTT assay for 6 days. While rhIL-1β inhibited proliferation of HNECs in concentration-dependent and time-dependent manners, rhTNF-a stimulated HNEC growth at concentrations ranging from 0.01 ng/mL to 10 ng/mL in concentration-dependent and time-dependent manner. In contrast, rhTGF-b inhibited HNEC growth irrespective of concentration and incubation time. This study suggests that IL-1β, TNF-α, and TGF-β may have an important role in the repair of the nasal mucosa by regulating proliferation of the nasal epithelium.

Production and characterization of an in vitro engineered human oral mucosa

2002 ◽  
Vol 80 (2) ◽  
pp. 189-195 ◽  
Author(s):  
Mahmoud Rouabhia ◽  
Noëlla Deslauriers
Keyword(s):  
Tissue Engineering ◽  
Epithelial Cells ◽  
Oral Mucosa ◽  
Oral Diseases ◽  
Ki 67 ◽  
Necrosis Factor Alpha ◽  
Engineering Technology ◽  
Cell Monolayers ◽  
Factor Alpha

The role of epithelial cells in oral pathologies is poorly understood. Until now, most studies have used normal or transformed epithelial cell monolayers, a system that largely bypasses oral mucosal complexity. To overcome these limitations, an engineered human oral mucosa (EHOM) model has been produced and characterized. Following histological and immunohistochemical analyses, EHOM showed well-organized and stratified tissues in which epithelial cells expressed proliferating keratins such as Ki-67, K14, and K19 and also differentiating keratin (K10). In this model, epithelial cells interacted with fibroblasts in the lamina propria by secreting basement membrane proteins (laminins) and by expressing integrins (β1 and α2β1). Cytokine analyses using cultured supernatants showed that cells in EHOM were able to secrete interleukins (IL) including IL-1β and IL-8 and tumor necrosis factor alpha (TNF-α). Finally, cells in this engineered model were able to secrete different metalloproteinases such as gelatinase-A and gelatinase-B. In conclusion, using tissue engineering technology, we produced well-organized EHOM tissues. It is anticipated that this model will be useful for examining mechanisms involved in oral diseases under controlled conditions by modeling the interactions between mucosa and microorganisms in the oral cavity.Key words: tissue engineering, oral mucosa, periodontitis, keratinocytes, fibroblasts.

Tropism of liver epithelial cells toward hepatocellular carcinoma in vitro and in vivo with altering gene expression of cancer stem cells

2018 ◽  
Vol 215 (4) ◽  
pp. 735-743
Author(s):  
Kuo-Shyang Jeng ◽  
Chi-Juei Jeng ◽  
Wen-Juei Jeng ◽  
I-Shyan Sheen ◽  
Shih-Yun Li ◽  
...  
Keyword(s):  
Gene Expression ◽  
Hepatocellular Carcinoma ◽  
Stem Cells ◽  
Epithelial Cells ◽  
Cancer Stem Cells ◽  
Liver Epithelial Cells

Factors modulating mouse lens epithelial cell morphology with differentiation and development of a lentoid structure in vitro

Development ◽  
1987 ◽  
Vol 99 (1) ◽  
pp. 25-32
Author(s):  
A.L. Muggleton-Harris ◽  
N. Higbee
Keyword(s):  
Epithelial Cells ◽  
Collagen Gel ◽  
Cell Aggregation ◽  
Lens Epithelial Cell ◽  
Lens Capsule ◽  
Lens Epithelial Cells ◽  
Collagen Membrane ◽  
Mouse Lens

The morphological and cellular changes that occur with differentiation and development of a lentoid structure from cultured mouse lens epithelial cells have been found to be dependent on the presence of lens capsule in association with the cells. The development of the ‘lentoid body’ is a multiphase process involving cell replication, synthesis of mucosubstances and a basement collagen membrane, cell aggregation and differentiation. Stage-specific synthesis of lens proteins confirms that the genes regulating normal differentiation in vivo are operating in the in vitro system. The hydrated collagen gel studies described in this report demonstrate that the cuboidal morphology and apical-basal polarity of the lens epithelial cells are dependent on their relationship with the lens capsule. Following a replicative phase the cells assume a mesenchyme-like morphology and migrate into the gel. Trypsinized cells freed from the lens capsule replicate but form colonies on the surface of the gel. The implications of these results are discussed with respect to previous observations made on normal lens development and the abnormalities associated with the congenital cataractous embryonic lens.

In vitro and in vivo regulation of liver epithelial cells carrying a metallothionein-rasT24 fusion gene

1988 ◽  
Vol 1 (2) ◽  
pp. 89-95 ◽  
Author(s):  
Toshio Seyama ◽  
Andrew K. Godwin ◽  
Margaret Dipietro ◽  
Thomas S. Winokur ◽  
Russell M. Lebovitz ◽  
...  
Keyword(s):  
Epithelial Cells ◽  
Fusion Gene ◽  
Liver Epithelial Cells
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