The acetylation status of histories regulates access of transcription factors to DNA and influences levels of gene expression.Histone deacetylase(HDAC)activity diminishes acctylation of histones,causing compaction of the DNA-histone complex.This compaction blocks gene transcription and inhibits cell differentiation.HDAC inhibitom decompact the DNA-histone complex and promote cell growth arrest,differentiation,and apoptosis of tumor cells.Meantime,HDAC inhibition also affects acetylation status and function of non-histone proteins.HDAC inhibitors not only possess significant anti-tumor effects with single use,but also has great significance in combined therapy with other drugs.

BACKGROUND: Studies have confirmed that nerve growth factor can promote wound tissue to release al kinds of endogenous growth factors and growth factor receptors, which play a positive regulatory role. The nerve growth factor can promote cel proliferation and accelerate wound healing, thus making the wound healing developed from the passive waiting healing to active control healing. OBJECTIVE: To investigate the effects of local application of nerve growth factor on the expressions of transforming growth factor β1 and basic fibroblast growth factor in rat burn wounds. METHODS: Twenty-four adult Sprague Dawley rats were used in the study, and Ⅱ degree deep burn wound was made on the back of rats. Then, these rats were randomly divided into four groups. After burn wound debridement, the wounds were covered with gauzes containing 1, 2.5 and 5 μg/mL nerve growth factor solution and normal saline respectively. At 3, 5, 9 and 14 days after treatment, the wound healing time and percentage of residual wound were observed. Then, wound tissues were cut for histological examination, in order to detect the expressions of transforming growth factor β1 and basic fibroblast growth factor in wounds, as wel as the cel ular DNA cycle. RESULTS AND CONCLUSION: The wound healing time in the treatment groups was shorter than that in the control group, especial y in 5 ug/mL nerve growth factor treatment group (P < 0.01), and the percentage of residual wound in the treatment groups was less than that in the control group. The histological examination showed the number of nucleated cells in the superficial dermis of the treatment groups was significant increased when compared with that in the control group; the expressions of transforming growth factor β1 and basic fibroblast growth factor in the treatment groups at different time points were stronger than those in the control group, and the expressions at 5 and 9 days were stronger than those at 3 and 14 days; percentage of cells in S phase of the treatment groups was significantly increased, especial y in 5 mg/L nerve growth factor group (P < 0.01). The results indicate that local application of nerve growth factor can accelerate wound healing by increasing the expressions of transforming growth factor β1 and basic fibroblast growth factor, stimulating mitosis and promoting proliferation.

Objective: To investigate the immunosuppressive effect of sinomenine (SIN) on xenogenic skin transplantation in mice.Methods: BALB/c→C57BL/6 tergal skin transplantation model was established by an operation, and then the mice were divided into 5 groups at random, namely sham group, model group, SIN group (30 mg·kg-1), ciclosporin A group (CsA) (10 mg·kg-1) and combination of SIN and CsA group (SIN 30 mg·kg-1 and CsA 5 mg·kg-1) (n=10).All the mice were intraperitoneally administered once a day for ten days.The survival days of skin graft were recorded, and the IL-2 levels in plasma were determined by ELISA respectively on the 4th and 8th day after the operation.Results: The mean survival days of skin graft in the groups treated with different drugs were significantly prolonged when compared with that in the model group (P<0.01).The combination of SIN and CsA administration showed longer mean survival days than SIN or CsA (P<0.05 or P<0.01).The IL-2 levels in plasma in the groups treated with different drugs were significantly reduced than those in the model group on the 4th and 8th day after the operation (P<0.01).Conclusion: SIN may have a good immunosuppressive effect in the mice with xenogenic skin transplantation, and the combination of SIN and CsA shows a synergistic effect.

The original meaning of Portfolio is briefcase, generally translated as study archives in our country, with learners as the center, through the process of goal setting, feedback learning, self-reflection, steps, to show yourself and target revision form of process evaluation with learners as the center, to continuously promote the personal comprehensive ability through reflective learning progress. Portfolio, introduced in clinical admissions bilingual teaching, through six aspects such as individual learning, classroom display, clinical teaching, practice process and result display and target changes, and through the learning process assessment (fuzzy comprehensive evaluation method) and professional knowledge assessment (mini) method evaluating the clinical practice, evaluates Portfolio, in order to improve the medical students' clinical thinking and their comprehensive ability of lifelong learning,and promote the medical students' all-round development.

[ABSTRACT]OBJECTIVETo investigate the species distribution of the common inhaled allergens among the primary and middle school students in Beijing.METHODSA total of 1280 students who were randomly selected underwent 20 kinds of common allergen skin prick test. Skin prick test were positive in 495 students.RESULTS49.3% of the Beijing primary and secondary school students were positive for more than four kinds of allergens. The dust mites and fall pollen allergens were positive at the same time in 37.4% of the allergen positive students. The commonest three allergens were D. farina, D. pteronginus and Large seed fleabane pollen in urban area, and were dermatophagoides farinae, willow tree pollen and Large seed fleabane pollen in suburban area. The positive rate of skin prick test decreased with age.CONCLUSIONThe dust mites and fall pollen are the most important allergens in primary and middle school students in Beijing.

[ABSTRACT]OBJECTIVETo investigate the prevalence of allergic rhinitis in Beijing primary and middle school students.METHODSStratified cluster sampling was conducted with the school as a unit. The investigated subjects included the 7 to 15 years old students from the primary and middle school in Beijing Dongcheng District and Changping District. The epidemiological investigation was carried out using the designed allergic rhinitis questionnaire. Allergen skin prick test was performed in students randomly selected from those who participated the questionnaire survey. The results were statistically analyzed.RESULTS1. The self-reported prevalence of allergic rhinitis was 49.68% in Beijing primary and middle school students. 2. Self-reported prevalence increased with age going up. 3. City center self-reported prevalence was higher than that in suburb areas. 4. The confirmed prevalence of allergic rhinitis in Beijing primary and middle school students was 21.09%, in which, the male prevalence rate was 24.83% and the female prevalence rate was 14.11%. 5. The 5.14% of the students with allergic rhinitis were combined with asthma.CONCLUSIONThe self-reported and confirmed prevalence of allergic rhinitis in Beijing primary and middle school students was 49.68% and 21.09% respectively.

We used the Brucella data in Xinjiang between year 2009 to 2010 to explore and analyze the spatial clustering fea‐tures of brucellosis in Xinjiang ,and provided the basis for prevention and control on brucellosis in Xinjiang ,China .The time and population distribution of brucellosis in Xinjiang was analyzed for statistical analysis with descriptive epidemiology .Mean‐while ,we also used quartile classification methods to map the incidence of brucellosis in Xinjiang spatial distribution ,and calcu‐lated the Global Moran’s I index on the spatial clustering analysis .Results showed that brucellosis in Xinjiang had obvious sea‐sonal differences (peaked in May‐September) ,more cases for male than that for female (gender ratio‐‐2 .96∶1) ,and the total incidence of 74% were farmer and herdsman ,mainly concentrated at th e age of 40 to 60 years old .Compared with the onset range of brucellosis in 2009 ,there were clear tendency to spread in 2010 .The Global Moran’s I index was 0 .116 4 (P=0 .017) ,showing the spatial clustering on the incidence of brucellosis in Xinjiang .The incidence of hot spots concentrated in Tacheng and Altay ,and the incidence of cold spots concentrated in Kashi .The incidence level brucellosis has significant spatial aggregation in the area of Xinjiang ,which should be strengthened the prevention and control of high‐risk areas .

Objective To investigate the expression change of renal NLR family pyrin domain containing-3 protein(NALP3) in-flammasome in the nephrotic syndrome(NS) patients with focal segmental glomerulosclerosis(FSGS) and its relation with the tubu-lointerstitial pathogenic injury degree ,expression of inflammatory factors and clinical biochemical indexes .Methods Immunohisto-chemistry was used to detect the expressions of NALP3/ASC/caspase-1 and their downstream effector molecule IL-1β,IL-18 in re-nal tubular epithelial cells .The tubulointerstitial injury score and the activated macrophages F4/80 in renal interstitium of the FSGS patients and NS patiens were evaluated .The serum creatinine ,urea ,total protein ,albumin ,24 h urine protein and estimated glomer-ular filtration rate(eGFR) were observed .The correlation of tubulointerstitial injury with NALP3/ASC/caspase-1 ,IL-1β,IL-18 were respectively analyzed .Results The expression of NALP3/ASC/caspase-1 ,IL-1β,IL-18 in the renal tissue of the FSGS pa-tients was significantly increased compared with that in the control group (P<0 .01) .NALP3/ASC/capspase-1 expression was pos-itively correlated with the expression of IL-1β,IL-18(P< 0 .01) .NALP3/ASC/caspase-1 ,IL-1β,IL-18 expression was positively correlated with renal tubulointerstitial injury and the F4/80 expression intensity(P<0 .01) .NALP3/ASC/caspase-1 ,IL-1β,IL-18 was significantly positively correlated with 24 h urine protein and Scr ,and negatively correlated with the eGFR (P<0 .05) ,but had no obvious correlation with plasma urea ,plasma total protein and albumin concentrations .Conclusion The NALP3 inflammasome might participate in the pathogenic mechanism of FSGS through the activation of its downstream inflammatory factor of IL-1β,IL-18 ,the more higher its expression degree ,the more severe the renal tissue injury ,whether which could be served as the warning in-dex needs the further clinical verification .

Now human parasites are still important pathogens to harm human health.Researches on parasites have ranged from the simple aetiology to the field of studying vital phenomena by modern science.However some domestic medical colleges cut out the course of human parasitology without enough consideration.Aiming directly at this phenomenon the author has discussed the scientific orientation of human parasitology in preclinical medicine education and expounded the point of view.

Objective To analyze the channels of going abroad of imported malaria patients in Jiangsu Province,so as to provide the evidence for the control of imported malaria and health intervention for high?risk population. Methods The data of imported malaria cases in Jiangsu Province in 2015 were collected and the channels of going abroad were analyzed. The Quan?tum GIS 1.7.4 software was applied to map. Results Totally 405 imported cases were reported in Jiangsu Province in 2015, and the cases increased by 14.1%compared with those in 2014. All the patients were migrant workers. The migrant workers were mostly sent abroad by construction companies[43.21%(175/405)]. The dispatching companies were mainly concentrated in Taizhou,Lianyungang,Zhenjiang and Yangzhou cities,accounting for 6.17%(25/405),3.21%(13/405),2.72%(11/405) and 2.22%(9/405),respectively. Totally 176(43.46%)patients returned to China having accompanied workers,and 1.21%(9/745)of accompanied workers were found having symptoms of malaria later. Conclusions It is difficult to monitor malaria in overseas migrant works in Jiangsu Province. The channels of going abroad of migrant workers are various and complicated ,for?mulating the main difficulty and challenge of imported malaria control.