ArticleZhongguo fei ai za zhi = Chinese journal of lung cancer2014
[Accumulation-associated protein gene and TGF-beta 1 affects the formation of lung cancer-related biological material Staphylococcus epidermidis biofilm].
Article in Zhongguo fei ai za zhi = Chinese journal of lung cancer, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
BACKGROUND AND
objectiveThis study was conducted to evaluate the effects of the accumulation-associated protein (Aap) gene and transform growth factor-beta 1 (TGF-β1) on the biofilm formation of lung cancer-related Staphylococcus epidermidis (SE).
methodsSpecies identification was performed to isolate SE strains from clinically implanted materials in lung cancer patients. Stable genetic aggregated proteins, which are associated with negative and positive isolates, were obtained. The biofilm-formation ability of the SE Aap gene was determined by PCR. Density gradient method was used to extract peripheral blood mononuclear cells from patients with non-small cell lung cancer. After 30 h, these cells were co-cultured with A549 at different TGF-β1 concentrations. The supernatant was then combined with SE Aap+ and SE Aap- strains and co-cultured with a medical silicone rubber. A semi-quantitative adhesion test was performed for each bacterial biofilm formation. Scanning electron microscopy was also conducted to observe the microcosmic condition of this material on the bacterial biofilm surface.
resultsThe Aap gene was closely related to SE biofilm formation. At 10 ng/mL, 20 ng/mL, and 40 ng/mL, SE Aap+ biofilm on the medical silicone rubber surface was thicker in the TGF-β1 group than in the control group. No significant differences were found between TGF-β1 groups. For the SE Aap- strains, no evident biofilm was formed in TGF-β1 and control groups.
conclusionsIn plant material-related infection of lung cancer patients, SE Aap+ strain easily forms biofilm. Furthermore, TGF-β1 was conducive for the biofilm formation of SE Aap+ strains.
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