Low-dose, long-wave UV light does not affect gene expression of human mesenchymal stem cells

ABSTRACT: This experiment was conducted to test multiple hypotheses: 1) long-wave 365 nm UV light exposure at low fluences does not alter gene expression of hMSC, 2) presence of radical species during polymerization causes DNA damage in hMSC, 3) 3D encapsulation of hMSC causes changes in gene expression of hMSC compared with traditional 2D culture, 4) Differencesin 3D hydrogel networks induce gene expression changes in hMSC The first publication derived from this data set concerns UV exposure and reactive radical species. Light is a non-invasive tool that is widely used in a range of biomedical applications. Techniques such as photopolymerization, photodegradation and photouncaging can be used to alter the chemical and physical properties of biomaterials in the presence of live cells. Long-wave UV light is an easily accessible and commonly used wavelength. Although exposure to low doses of long-wave UV light is generally accepted as biocompatible, most studies only investigate cell viability, ignoring other possible non-toxic effects. Since light exposure could potentially induce phenotypic changes (i.e. if damage repair mechanisms are activated), we examined changes in gene expression of human mesenchymal stem cells exposed to light under various 2D and 3D culture conditions. While exposure to long-wave UV light did not induce any significant changes in gene expression regardless of culture conditions, significant changes were observed due to scaffold fabrication chemistry and between cells plated in 2D versus 3D scaffolds.

ORGANISM(S): Homo sapiens

PROVIDER: GSE58093 | GEO | 2015/09/02

SECONDARY ACCESSION(S): PRJNA248892

REPOSITORIES: GEO