Epigenetics is defined as heritable changes in genc expression that are,unlike mutations,not attributable to alterations in the sequence of DNA.The predominant epigenetic mechanisms are DNA methylation,histone modification and microRNA.Exploring the precise roles of epigenetic factors on autoimmunity has become an active research area.Rheumatoid arthritis (RA) is a chronic autoimmune inflammatory disorder with a prevalence of approximately 0.5％ to 1.0％ worldwide.The mechanisms underlying the initiation and progression of RA are still not completely understood.In recent years,the epigenetics of RA have been widely investigated.Alterations in the modification of histones and DNA methylation are the two major epigenetic mechanisms that may potentially cause a breakdown of immune tolerance and the perpetuation of RA.These epigenetic changes may be ideal targets for new personalized treatments.

Purpose This paper was to investigate the correlation between in vitro and in situ methods for propafenone transnasal absorption.MethodsUsing excised sheep nasal mucosa permeation test in vitro and rat nasal infusion test in situ. By means of changing the medium pH, drug conoentration, and forming β-cyclodextrin inclusion compound, the permeability coeffident (Pm), mean permeation rate, and permeation fraction were determined in vitro. Under the corresponding conditions the absorption rate oostant(k ) ,mean absorption rate and absorption fraction in situ were also detrmined.ResultsThe linear regression coefficient indicated that,under the various experimental conditions,a good in vitro-in situ correlation could be confirmed.ConclusionsHaving an in vitro-in situ correlation is useful for scientific justifying the different methods for nasal absorption studies.

Objective To explore the expression of PRR11(Proline-rich protein 11) in human osteosarcoma and investigate the effect of PRR11 on the proliferation of human osteosarcoma cells.Methods Immunohistochemical staining was applied to detect the PRR11 expression in 75 cases of osteosarcoma and corresponding normal tissues.Western blotting was used to examine PRR11 protein expression levels in osteosarcoma cell lines.We used siRNA to knock down the expression of PRR11 and tested the effects of PRR11 down-regulation on the proliferation in SaOS2 cells.Results PRR11 was overexpressed in osteosarcoma specimens compared to their paired normal tissues,the over expression rate of PRR11 in osteosarcoma and corresponding paracancerous tissues were 76％(57/75) and 9.33％(7/75) with statistical difference(P<0.05).The high expression of PRR11 was correlated with tumor pathological grade and lymphatic metastasis(P<0.05).PRR11 was expressed in 4 osteosarcoma cell lines which were SaOS2,143B,U2OS and MG63 respectively,the expression was highest in SaOS2 cells.Silencing PRR11 inhibited cell growth as compared with control cells(P<0.05).Conclusion PRR11 is overexpression in human osteosarcoma and promotes its progression by enhancing proliferation.The increased expression of PRR11 in osteosarcoma is a new target for treatment and early diagnosis of human osteosarcoma patients.

Objective To study the serum iaminin (LN) and fibronectin (FN) changes in acute coronary syndromes (ACS), and explore the role of them in assessing the severity of ACS. Methods This study included 46 ACS patients [25 with acute myocardial infarction (AMI) and 21 with unstable angina (UA)], 51 stable angina (SA) patients and 47 people without CHD as controls. Serum levels of LN, FN, fibrinogen and blood fat were assessed. Coronary angiography were performed on 49 of them. Results The serum concentration of LN was lower in ACS patients [(85.20±27. 57)ng/mL], higher in SA patients [(116. 80 ± 28. 80)ng/mL] as compared to that in the control group [(100.06±29.96)ng/mL], with significant difference among the groups (P<0.05). No difference was found in FN among the three groups. However, the subgroup analysis in the group with ACS showed that the serum concentration of FN was significantly higher in UA patients [(229.60±121.39)μg/mL ], and lower in AMI patients [(108.31±47.12) μg/mL ]. The serum LN and FN concentration could respectively enter the logistic regression equations of ACS patients and US patients. Neither LN nor FN concentration was correlated with narrowing of coronary artery of angiography. Conclusion Serum LN and FN level may be a useful indicator for stability of atherosclerosis plaque in coronary arterial disease patients, but could not predict the extent of narrowing in coronary angiography.

Objective To investigate the influence of lipid metabolic markers on hip osteoarthritis (OA) and the correlation with the pain of hip.Methods In this retrospectively cross sectional analysis,393 subjects fufilling the inclusive criteria were continuously included from June 2013 to September 2014.The presentation of hip X-ray of subjects were classified into OA group and non-OA group in terms of Kellgren-Lawrence grading scale,the subjects with Kellgren-Lawrence (K-L)≥2 was classified into OA group.The average of age in total was (62±9) years.There were 183 males and 210 females,the number of patients with OA was 182.There were 210 patients with hypertension and 118 patients with diabetes while the number of smoking patients was 74.The demographic information,risk factors,blood pressure,blood glucose,lipid metabolic markers were analyzed.Differences in proportions were compared using the Chi-square test.Difterences in continuous variables were tested for statistical significance using t test analysis.VAS score was used to evaluate the severity of hip pain.Independent risk factors were confirmed by using multiple logistic regression analysis.The correlation between the risk factors and severity of hip pain was analyzed by Spearman correlation analysis.Results Statistically significance existed in age (t=-4.849),sex (x2=8.946),BMI (t=-4.794),hypertension (x2=4.751),smoking (x2=7.062),metabolic syndrome (x2=34.406),apolipoprotein A1 (t=2.352),apolipoprotein B (t=-6.870),high density lipoprotein cholesterol (t=2.519),triglyceride (t=-4.652) and ApoB/ApoA1 ratio (t=-4.901) between OA group and non OA group.Age [OR =1.060(1.033,1.086)],metabolic syndrome [OR=3.682(2.284,5.938)] and ApoB/ApoA1 ratio [OR=5.743(2.393,13.785)] were the independent risk factors.The ApoB/ApoA1 ratio had positive correlation with the severity of hip pain(r=0.379).Conclusion ApoB/ApoA1 ratio is the independent risk factor of hip osteoarthritis,and has positive correlation with the severity of hip pain.The ApoB/ApoA1 ratio should be monitored in hip osteoarthritis patients in clinical work,to get the relief of pain and improve hip osteoarthritis.

Objective The effect of fertilizer application on yield and quality of Notopterygium forbesii was studied in order to provide a theoretical basis for high quality and yield planting.Methods With various nitrogenous(N) and phosphorous(P) fertilizer formula,the field tests were carried out to determine the yield,extract content,and essential oil content,from the root of N.forbesill.Results Showed that various proportion of fertilizer had a great affect on yield,extract content,and essential oil content,and the treatment with N2P2 was the highest.The yield in the treatment with N2P2 increased 43.33%,the extract content increased 17.95%,and the essential oil content increased 43.48% as compared with CK.Different rates of fertilizer application had a certain effect on weight and diameter in the root of N.forbesii,and the N2P2 was the best.Each treatment had a significant effect on diameter in the root of N.forbesii in comparision with CK.Conclusion Amount and ratio of N and P fertilizers have a greater influence on the yield and quality,while improper application could reduce the yield and quality.

Objective To synthesize podo-and epipodo-podophyllotoxin labeled with 11C and investigate their biodistribution in mice bearing EMT6 tumor by microPET.Methods 11 C-podo-or epipodopodophyllotoxin was synthesized by 11 C-CH3-Triflate mixed with 4'-methyl-demethmyl-podophyllotoxin (podo-and epipodo-) and purified using HPLC.The radiochemical purity (RCP) was analyzed by HPLC.Thirty mice bearing EMT6 tumor were divided into 2 groups and injected with 3.7 MBq 11C-podo-or epipodo-podophyllotoxin.The biodistribution of 11C-podo-or epipodo-podophyllotoxin was evaluated with microPET.The ID％/g was calculated.Paired t test was used to analyze the data.Results The yields of 11C-podo-and epipodo-podophyllotoxin were both ＞90％.The RCP was ＞99％.The biodistribution of 11C-podo-and epipodo-podophyllotoxin was similar with slow blood clearance and high uptake in abdomen.The tumor uptake of 11C-epipodophyllotoxin and 11C-podophyllotoxin at 30 min was (3.63±0.98) ％ID/g and (3.16±0.27) ％ID/g,respectively.The uptake ratio of tumor to blood and to muscle was 0.68 vs 0.62 and 1.52 vs 1.22,respectively.There was no significant difference between the tumor uptake of the two agents (t=0.47,P＞0.05).The result of microPET imaging was consistent with that of mice experiment.Conclusion 11C-podophyllotoxin has limited clinical value for tumor imaging.

Objective Laboratory tests of yeast, with their disadvantages of long identification, complicated operation, and low positive rate, cannot meet the needsof rapid diagnosis and timely treatment.This studyinvestigated the feasibility ofapplying matrix-assisted laser desorption ionization-time of flight mass spectrometry ( MALDI-TOF-MS) in rapid identification and clinical isolationof yeast strains. Methods A total of 120 clinical non-repetitive isolates were collected from clinical culture samples and identified by MALDI-TOF-MS and VITEK 2-Compact/API, respectively.The discordant results were resolved by ITS gene sequencing. Results Of the 120 yeast isolates analyzed, 117 (97.5%) were correctly identified at the species level by MALDI-TOF-MS, 1(0.8%) misidenti-fied, and 2 ( 1.7%) unidentified.ITS gene sequencing of the 3 isolates showed the coincidence rate to be 0( 0/3) for MALDI-TOF-MS and Vitek 2-Compact/API. Conclusion MALDI-TOF-MScan be used as a rapid, accurate, and inexpensive tool for the identification of clinical yeast strains.

Objective: The aim was to explore the association between the HLA-DRB1 allele polymorphism and susceptibility to chronic myelogenous leukemia(CML)in Chinese Han population.Methods: The polymorphism of HLA-DRB1 alleles in 762 CML patients and 2 264 normal umbihcal cord blood samples were tested by polymerase chain reaction with sequence specific primer(PCR-SSP).Results: The most common allele in DRB1 locus in normal population was DRB1 * 15(17.25%), whereas DRB1 * 10 was the least frequent allele(1.39%).Compared with normal controls, the frequency of HLA-DRB1 * 08 was significantly increased in all CML groups(7.48%vs 5.39%, X~2 =8.963,OR= 1.023, P =0.004)and CML male groups(7.72%vs 5.39%,X~2 = 8.059,OR= 1.025,P = 0.007).But there was no significant difference between the normal controls and CML female patients.Conclusion: It should be concluded that DRB1 * 08 could be considered a susceptible allele for CML male patients.

OBJECTIVE To investigate the aminoglycoside modifying enzymes genes of multi-drug resistant Acinetobacter baumannii(MDR-ABA).METHODS The four kinds aminoglycoside modifying enzymes genes(aac(6′)-Ⅰad,aac(6′)-Ⅰb,aac(3)-Ⅰ,ant(3″)-Ⅰ) of 20 strains MDR-ABA were detected by PCR.RESULTS Among 20 MDR-ABA strains,12 strains of aac(3)-Ⅰ,15 strains of aac(6′)-Ⅰb,18 strains of ant(3″)-Ⅰwere positive,and aac(6′)-Ⅰad was negative.The new subtype aac(6′)-Ⅰad gene has not been found.CONCLUSIONS Twenty strains MDR-ABA aminoglycoside modifying enzymes genes are found in all the 20 MDR-ABA strains.The genotype is in accordance with antibiotics resistance.It can induce clone transmitting hospital infection.It is first time to study the aac(6′)-Ⅰad gene of A.baumannii in China.