The Influence of Cell-Cell Contact on Radiosensitivity of Human Squamous Carcinoma Cells

1991 ◽  
Vol 126 (1) ◽  
pp. 52 ◽  
Author(s):  
Tim T. Kwok ◽  
Robert M. Sutherland
Keyword(s):  
Squamous Carcinoma ◽  
Carcinoma Cells ◽  
Cell Contact ◽  
Squamous Carcinoma Cells ◽  
Cell Cell

scholarly journals Cytotoxic Influence of Khat (Catha edulis (Vahl) Forssk. ex Endl) on Oral Fibroblasts, Squamous Carcinoma Cells, and Expression of α Smooth Muscle Actin

2021 ◽  
Vol 11 (8) ◽  
pp. 3524
Author(s):  
Azeem Ul Yaqin Syed ◽  
Muhammad A. Ahmed ◽  
Eman I. AlSagob ◽  
Mansour Al-Askar ◽  
Abdulrahman M. AlMubarak ◽  
...  
Keyword(s):  
Cell Death ◽  
Smooth Muscle ◽  
Smooth Muscle Actin ◽  
Control Cell ◽  
Squamous Carcinoma ◽  
Carcinoma Cells ◽  
Muscle Actin ◽  
Catha Edulis ◽  
Squamous Carcinoma Cells ◽  
Dose Dependent

The aim was to determine the cytotoxicity of Khat (Catha edulis (Vahl) Forssk. ex Endl) on normal oral fibroblasts (NOFs) and SCC4 (squamous carcinoma cells) along with expression of α-smooth muscle actin (α-SMA) in fibroblasts. Khat filtrate was prepared to obtain a concentrated viscous solution. NOFs and SCC4 cells were cultured in biological cabinets and were grown in Dulbeccos’ modified Eagles medium. Frozen cells were thawed at 37 °C and cell seeding was performed. NOFs and SCC4 cells were seeded on 96 well plates and allowed to attach. The medium was removed and a fresh medium containing different concentrations of Khat was added. The group without Khat served as a negative control and 4% paraformaldehyde as the positive control. Cell viability was assessed using the MTT assay and effect of Khat on fibroblast and SCC4 phenotypes was evaluated by immunostaining. Analysis of variance was used to assess data (p < 0.05). NOF 316 showed cell death in response to 4% paraformaldehyde, 12.5, 6.25, and 3.12 mg/mL of Khat. The highest concentration of Khat (25 mg/mL) failed to cause cytotoxicity of NOF 316. NOF 319 and NOF 26 displayed cell death at all concentrations of Khat, however, cytotoxicity was not dose dependent. NOF 18 and SCC4 cells showed dose-dependent cell death. NOF 316 showed α-SMA expression after 1 mg/mL of Khat exposure. Not all fibroblasts were α-SMA-positive, suggesting specific activation of a subset of fibroblasts. Khat is cytotoxic to NOF and SCC4 cells. Furthermore, it can also cause activation and phenotypic changes in oral fibroblasts, indicating a potential role in progression of oral squamous cell carcinoma.

Upregulation of HO-1 is accompanied by activation of p38MAPK and mTOR in human oesophageal squamous carcinoma cells

2013 ◽  
Vol 37 (6) ◽  
pp. 584-592 ◽  
Author(s):  
Jian-Li Hu ◽  
Lan Xiao ◽  
Zhen-Yun Li ◽  
Qiong Wang ◽  
Yu Chang ◽  
...  
Keyword(s):  
Squamous Carcinoma ◽  
Carcinoma Cells ◽  
Squamous Carcinoma Cells

Improved gene transfer to esophageal adenocarcinoma and squamous carcinoma cells using targeted adenovirus vectors

2001 ◽  
Vol 120 (5) ◽  
pp. A11
Author(s):  
Willem A. Marsman ◽  
Christianne J. Buskens ◽  
John G. Wesseling ◽  
Hidde J. Haisma ◽  
David T. Curiel ◽  
...  
Keyword(s):  
Gene Transfer ◽  
Esophageal Adenocarcinoma ◽  
Squamous Carcinoma ◽  
Carcinoma Cells ◽  
Squamous Carcinoma Cells ◽  
Adenovirus Vectors

scholarly journals DNA-Bound Platinum Is the Major Determinant of Cisplatin Sensitivity in Head and Neck Squamous Carcinoma Cells

PLoS ONE ◽  
2013 ◽  
Vol 8 (4) ◽  
pp. e61555 ◽  
Author(s):  
Sanne R. Martens-de Kemp ◽  
Simone U. Dalm ◽  
Fiona M. J. Wijnolts ◽  
Arjen Brink ◽  
Richard J. Honeywell ◽  
...  
Keyword(s):  
Head And Neck ◽  
Squamous Carcinoma ◽  
Carcinoma Cells ◽  
Major Determinant ◽  
Squamous Carcinoma Cells ◽  
Cisplatin Sensitivity

Down-regulation of p21Waf-1 protein facilitates IR- and UV-induced apoptosis in human squamous carcinoma cells

2004 ◽  
Author(s):  
Shinsuke Izumaru ◽  
Nobuyuki Arima ◽  
Yasuo Toyozumi ◽  
Seiya Kato ◽  
Minoru Morimatsu ◽  
...  
Keyword(s):  
Squamous Carcinoma ◽  
Carcinoma Cells ◽  
Down Regulation ◽  
Squamous Carcinoma Cells ◽  
Induced Apoptosis
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