This study is to investigate the protective effect of astaxanthin against injured hepatocyte L-02 cells induced by sodium azide (NaN3) and reveal the possible mechanisms. Hepatocyte L-02 cells were exposed to 100 mmol.L-1 NaN3 with various concentrations of astaxanthin pre-incubated, then the cell viability was measured by MTT method; The level of reactive oxygen species (ROS) was determined by DCFH-DA method; The changes of mitochondrial membrane potential (MMP) and apoptosis ratio were detected by JC-1 method and Annexin V-FITC/PI double stain method, respectively. Results showed that after cells were exposed to 100 mmol.L-1 NaN3 for 3 hours, the cell viability significantly decreased; ROS level and the percentage of late phase apoptosis increased obviously; MMP was also declined. When cells were pretreated with astaxanthin, the cell damage and late phase apoptosis ratio reduced and MMP was maintained. However, the level of ROS showed insignificant decrease (P>0.05). The beneficial concentration of astaxanthin in improving cell viability and MMP was not in a dose dependent manner and the most effective of which was 0.10 nmol.L-1 (P<0.01). In order to reveal its possible non-antioxidant mechanism, mitochondrial membrane was imitated and H+ transferring function of astaxanthin was also detected by bilayer lipid membrane (BLM) method. Results showed that 2.0% astaxanthin could transfer H+ efficiently. These suggested the mechanisms of astaxanthin in protection of hepatocyte L-02 cells not via its ROS quenching capability but via its H+ transferring function, which improved the mitochondrial function and had the sequence biology effects.

OBJECTIVETo evaluate a expanded reverse island flap with a saphenous neuro-vascular pedicle for repairing the defects of the feet and ankles.

METHODSAn expanded reverse island skin flap, with the Six saphenous neuro-vascular pedicle, was designed to repair the skin defects on the feet and ankles.

RESULTSpatients with the defects of the feet and ankles were treated with the expanded saphenous island flap and all of the The expanded reversed island skin flaps were survived. The largest flap size was 12 cm x 10 cm.

CONCLUSIONSflap could be a good option for repairing the defects of the feet and ankles.

Adolescent ; Adult ; Ankle Injuries ; surgery ; Child ; Female ; Femoral Nerve ; surgery ; Graft Survival ; Humans ; Male ; Middle Aged ; Skin Transplantation ; Soft Tissue Injuries ; surgery ; Surgical Flaps ; blood supply ; innervation ; Young Adult

Hepatitis B is a serious infectious disease worldwide, and hepatitis B virus (HBV) is the direct cause of this disease. In recent years, as an essential part of its evolutionary process, HBV mutation has been extensively studied domestically and globally. However, the study on the conserved sequences in HBV sequences is still in its infancy. In this study, we applied multiple EM for motif elicitation (MEME) algorithm to discover HBV motif and proposed a new metric, conservative index (CI), to carry out phylogenetic analysis based on HBV sequences. Then, the constructed phylogenetic tree was subjected to reliability assessment. The results demonstrated that the new metric CI combined with the MEME algorithm can effectively help to discover motifs in HBV sequences and construct a phylogenetic tree based on them and to analyze the evolutionary relationship between HBV sequences; in addition, the possible ancestral sequences of samples may be obtained by conservative analysis. The proposed method is valuable for the exploratory study on large HBV sequence data sets.
Computational Biology ; Conserved Sequence ; Evolution, Molecular ; Hepatitis B virus ; genetics ; Humans ; Nucleotide Motifs ; Phylogeny ; Reproducibility of Results

OBJECTIVE:To study the effect of losartan on heart rate variability of essential hypertensive patientsMETHO_DS:The heart rate power spectral density and time-domain in 24-hour dynamic EKG were analyzed in 50 healthy subjects and in 90 patients with hypertension before and after giving losartanRESULTS:The low frequency and total frequency and ratio between low frequency and high frequency of hypertensive patients were significantly higher than those of controls,the high frequency and standard deviation of normal-to-normal intervals(SDNN) and standard deviation of the average of RR intervals(SDANN) for each five-minute period of the 24-hour eletrocardiographic recordings were significantly lower than those of controlsThe SDNN and high frequency of grade Ⅲ hypertension were significantly lower than those of grade Ⅱ hypertensionThe low frequency and ratio between low frequency and high frequency of grade Ⅲ hypertension were significantly higher than those of grade Ⅱ hypertension,and so were the grade Ⅱ than those of the grade Ⅰ It showed that vegetative nerve functi_onal damage was positively related with hypertensive gradeThe severer the illness,the greater the changeAfter losartan treatment,in addition to lowing the blood pressure,the SDNN,SDANN and high frequency of hypertensive patients were significantly increasedThe low frequency,total frequency and ratio between low frequency and high frequency of hypertensive patients were significantly decreasedCONCLUSION:When losartan lowers blood pressure,it can significantly improve the heart rate variability of essential hypertensive patients

Objective To investigate the effect of dexamethasone addition in block anesthesia before surgery on postoperative quality of life after extraction of impacted mandibular wisdom teeth. Methods Using a random number table, 120 cases of patients were divided into experimental and control groups, each group contains 60 cases whose mandibular wis?dom tooth will be extracted. Before the surgery, the experimental group patients perform local block anesthetic injection with 3 mL out of 5 mL mixture of 2%lidocaine 4 mL+dexamethasone 1 mL (5 mg) to block nerve. The control group was given block anesthesia of inferior alveolar nerve with 3 mL of 2%lidocaine block anesthesia alone. Improved postoperative symp?toms severity scale (PoSSe) was used to evaluate patients’quality of life after tooth extraction comprehensively and quantita?tively by analysis and comparison of the two sets of scores. Results The experimental group’s PoSSe scores were 18.059 1 ± 13.210 9, which was lower compared with control group (27.819 3 ± 15.716 9). In experimental group, diet, language, swelling, pain and daily points were lower than the control group (P<0.05). Conclusion Topical application of dexamethasone in mandibular wisdom tooth extraction reduces postoperative adverse reactions in a certain degree and im?prove postoperative quality of life.

Retinal pigment epithelium ( RPE ) is a vital tissue for the maintenance of photoreceptor function and environment of outer retina, also the predominant cell type of proliferative vitreoretinopathy ( PVR ) . lt is also affected by many diseases of the retina and choroid, including diabetic retinopathy ( DR) , age-related macular degeneration ( AMD ) and retinal pigmentosa ( RP ) . Although of neural origin, the RPE is capable of local repair, and cells may migrate and take on altered characteristics. These findings indicate that RPE-based therapy is a promising option for congenital or degenerate disease of the retina.

OBJECTIVE:To guarantee the reliability of cold chain drug storage device and the quality of the drugs in the hospi-tal. METHODS:The establishment and effects of drug cold chain monitoring platform in our hospital were introduced as well as re-lated improvement and measures. RESULTS:The cold chain monitoring platform was established in our hospital through equipping with related equipment, constructing platform network, determining monitoring point, setting early warning condition, etc. All-weather and real-time monitoring of temperature and humidity were realized for different districts of the hospital and different cold chain equipments. The platform could provide the information about operating condition of equipment,and complete drug re-frigeration temperature record;equipment failure could be dissolved in time based on early warning message. Through analyzing rea-sons of early warning message,the unqualified equipment was updated in time,which further improve the system and procedure of cold chain monitoring platform. Within 2 years after the implementation of the platform,53 sets of special refrigerator for drug were updated. Monthly early warning message and the rate of refrigeration equipment early warning decreased from 6869 and 100% in Sept. 2014 at the early stage of short message warning function to 1083 and 40% in Feb. 2016,respectively. CONCLU-SIONS:The establishment of drug cold chain monitoring platform guarantees the reliability of cold drug storage condition so as to ensure the quality of drug in the hospital.

A protease from the culture supernatant of marine bacteria Pseudomonas sp. 7~11 was discovered. One component of the protease was purified to homogeneity by ammonium sulfate precipitation, dialysis, ion exchange chromatography. The specific activity of the enzyme was raised from 19.46U?mg -1 to 13953115U?mg -1 ,which was 717.02 times that of the culture supernatant with a yield of 1.24%.The molecular mass of purified enzyme was estimated to be 3000Da about by SDS PAGE. The optimum temperature for the activity was observed to be 45℃ using casein as substrate.The optimum pH for activity the enzyme was 8.0 and it was stable between pH6～7 and below 50℃.The activity of the enzyme was inhibited by EDTA and IAA strongly. But was not inhibited by PMSF. the enzyme was inhibited Mn 2+ , Hg 2+ , Fe 2+ , Zn 2+ , Cu 2+ ,Pb 2+ and SDS. The inactivity of the enzyme with EDTA could be recovered partially by Mg 2+ .while Ca 2+ , Mg 2+ and (NH 4) 2SO 4 was activator for the activity of the enzyme. The activity of the enzyme was fairly stable in the presence of ethanol and urea, and was resistant to Tween 20.

The optimum medium for Lactobacillus M7 was systematically studied with SAS system. Firstly, the prime factors affecting lactic acid yield were selected by means of Plackett-Burman design; secondly, the pnme facias were optimized by response rurface analysis. Under the optimum level determined, the yield is increased by 15%.

Adult ; Humans ; Male ; Patellar Dislocation ; congenital ; diagnosis ; therapy