Induction of apoptosis and up-regulation of cellular proliferation in oral leukoplakia cell lines inside electric field
Objective In dentistry, metallic alloys are used for dentures, restorative materials, and orthodontic devices. Electric voltages up to 950 mV may occur between different dental alloys in the oral cavity. This study aimed to investigate physiologic reactions of oral leukoplakia cells in vitro to elec...
Saved in:
Published in | Oral surgery, oral medicine, oral pathology and oral radiology Vol. 113; no. 5; pp. 644 - 654 |
---|---|
Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
New York, NY
Mosby, Inc
01.05.2012
Elsevier |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | Objective In dentistry, metallic alloys are used for dentures, restorative materials, and orthodontic devices. Electric voltages up to 950 mV may occur between different dental alloys in the oral cavity. This study aimed to investigate physiologic reactions of oral leukoplakia cells in vitro to electric fields. Study Design A human leukoplakia cell line (MSK-LEUK1), cultivated in keratinocyte growth medium (KGM-2) supplemented with growth factors in 5% CO2 humidified air at 37°C, was exposed to electric field strength of 1-20 V/m for 24 hours in a custom-made pulse chamber. The cells were then analyzed for proliferation with the use of BrdU assay and for apoptosis with the use of TUNEL assay. Findings were assessed with the use of fluorescent microscopy. Ultrastructural changes were studied by transmission electron microscopy. Results Electric field strength of 1-10 V/m led to up-regulation of cell proliferation rate from 10.64% to 44.06% ( P = .0001). The apoptotic index increased significantly ( P = .0001) from 20.03% at 1 V/m to 46.56% at 10 V/m. Individual cell keratinization was seen in leukoplakia cells treated with 16 V/m. Conclusions Oral galvanism induces subcellular changes in oral precancer cells in vitro that closely simulate some of the morphologic features of oral squamous cell carcinoma cells in vivo. |
---|---|
Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2212-4403 1079-2104 2212-4411 1528-395X |
DOI: | 10.1016/j.oooo.2011.11.016 |