Animals ; Catalysis ; Cell Adhesion ; drug effects ; radiation effects ; Humans ; Hydrophobic and Hydrophilic Interactions ; Osseointegration ; drug effects ; radiation effects ; Osteoblasts ; cytology ; drug effects ; radiation effects ; Osteogenesis ; drug effects ; radiation effects ; Photochemical Processes ; Surface Properties ; radiation effects ; Time Factors ; Titanium ; chemistry ; pharmacology ; radiation effects ; Ultraviolet Rays

OBJECTIVETo evaluate the adhesion, proliferation and differentiation of osteoblast-like cells on the ultraviolet (UV)-treated titanium in different storing environment, and to find a way to enhance the bioactivity of titanium and to prevent its age-related degradation.

METHODSAcid-etched titanium disks stored under ambient conditions for 4 weeks and treated with UV light for 48 h.Then disks were divided into three groups and placed in a sealed container for 0 h (no-stored,NO group) , 4 weeks (air-stored, AS group) or in a sealed container filled with nitrogen for 4 weeks (nitrogen-stored,NS group) respectively. A group of UV-untreated titanium served as negative control (NC group).The surface morphology was evaluated using scanning electron microscopy (SEM), and hydrophilicity of disks were measured using contact angle measuring device. Cell counting kit-8 was used to measure the cell adhesion and proliferation. Cell differentiation was evaluated by testing alkaline phosphatase (ALP) activity using ALP reagent kit.

RESULTSThere was no difference in surface topography among groups.Contact angels in NS group [(67.70 ± 3.59)°] and NO group [(0.70 ± 0.28)°] were smaller than the others (P < 0.05). Cell adhesion in NS group at 2 h and 4 h point was (0.237 ± 0.006) and (0.578 ± 0.039), respectively, and proliferation at 3 d and 5 d point was (0.743 ± 0.026) and (1.548 ± 0.046) respectively, which were significantly higher than those in AS group [(0.158 ± 0.036), (0.400 ± 0.010), (0.499 ± 0.019) and (1.174 ± 0.062)] and in NC group [(0.161 ± 0.024), (0.390 ± 0.011), (0.508 ± 0.015) and (1.209 ± 0.025)] at the same time point (P < 0.05). How ever the results mention above in the NS group were lower than those in the NO group (P < 0.05). No difference were found between data from the AS group and NS group (P > 0.05). Osteoblast-like cells had an abundant spread on NS and NO group during 2 h incubation, but did not exactly spread on AS and NC group after incubation for 4 h. No difference were found in ALP among groups.

CONCLUSIONSUV treatment can enhance bioactivity of titanium, and nitrogen storage can slow down its biological aging.

Alkaline Phosphatase ; metabolism ; Animals ; Biocompatible Materials ; chemistry ; Cell Adhesion ; radiation effects ; Cell Differentiation ; radiation effects ; Cell Proliferation ; radiation effects ; Cells, Cultured ; Mice ; Microscopy, Electron, Scanning ; Nitrogen ; chemistry ; Osteoblasts ; cytology ; metabolism ; Surface Properties ; Titanium ; chemistry ; radiation effects ; Ultraviolet Rays

We investigated the pathogenic spectrum of enteroviruses associated with hand, foot and mouth disease (HFMD) in Jinan, China. A total of 274 specimens with a clinical diagnosis of HFMD in Jinan from 2009 to June 2012 were used. A GenomeLab™ (GeXP)-based multiplex reverse transcription-polymerase chain reaction (RT-PCR) assay was employed to simultaneously detect 15 serotypes of human enteroviruses: human enterovirus (EV)71; coxsackievirus A (CVA)16, 4, 5, 6, 9, and 10; CVB1, 3 and 5; echovirus (Echo) 6, 7, 11, 13 and 19. Results showed that all samples were enterovirus-positive, with the most common serotypes being EV71 (25.18%) and CVA16 (16.06%), followed by CVA10 (14.23%), CVA6 (7.30%), CVB1 (1.09%), Echo6 (0.73%), CVA9 (0.36%), CVB3 (0.36%) and co-infections (5.11%). CVA10 and CVA6 had the third and fourth highest prevalence of pathogens for HFMD, respec- tively. The most prevalent season for CVA10 was from April to August, with a peak in April; for CVA6 it was from April to August, with a peak in June. This is the first report of the pathogenic spectrum of en- teroviruses associated with HFMD in Jinan using the GeXP-based multiplex RT-PCR assay. These data will provide the scientific evidence for the prevention and control of epidemics, as well as therapy for HFMD patients.
Child ; Child, Preschool ; China ; Enterovirus ; genetics ; pathogenicity ; Hand, Foot and Mouth Disease ; virology ; Humans ; Infant ; Multiplex Polymerase Chain Reaction ; methods ; Time Factors

Biopsy, Fine-Needle ; Female ; Humans ; Hypercalcemia ; etiology ; Mediastinal Cyst ; diagnosis ; diagnostic imaging ; pathology ; Middle Aged ; Parathyroid Diseases ; diagnosis ; diagnostic imaging ; pathology ; Ultrasonography

There are growing evidences that pinocembrin has better neuroprotective effect. In the present study, the effect of pinocembrin on mitochondrial respiratory function was evaluated in global brain ischemia/ reperfusion (4-vessel occlusion, 4-VO) rats. The results showed that pinocembrin improved the respiratory activity of 4-VO brain mitochondria, through increasing ADP/O, state 3 respiration state (V3), respiration control rate index (RCI) and oxidative phosphorylation rate (OPR). And then, the effect of pinocembrin on brain mitochondria was verified in vitro. The results showed that pinocembrin increased ADP/O, state 3 respiration state, respiration control rate index, oxidative phosphorylation rate in NADH/FADH2 dependent respiratory chain and decreased state 4 respiration state (V4) in NADH dependent respiratory chain. Pinocembrin improved ATP content in brain mitochondria in vitro and in SH-SY5Y cells.
Adenosine Diphosphate ; metabolism ; Adenosine Triphosphate ; biosynthesis ; Animals ; Brain Ischemia ; pathology ; physiopathology ; Cell Line, Tumor ; Cell Respiration ; drug effects ; Flavanones ; pharmacology ; Hippocampus ; pathology ; Male ; Mitochondria ; drug effects ; physiology ; Neuroblastoma ; metabolism ; pathology ; Neurons ; drug effects ; Neuroprotective Agents ; pharmacology ; Oxygen ; metabolism ; Rats ; Rats, Sprague-Dawley