Polycyclic aromatic hydrocarbons (PAHs) are widespread environmental pollutants with high toxicity. It is a potent way to remove these pollutions by microbe degradation and conversion, and many bacteria have been found performing this function. Here the bacterial catabolic enzymes and genes participating in upper pathway of PAHs degradation were revealed, the genetic properties were illuminated, and the gene evolution of PAHs catabolism was further discussed. It would contribute to elucidating PAHs degrading mechanisms in bacteria and provide theoretical evidence for achieving efficient bioremediation.

The article introduces the denomination,desire of precaution and content of medical risks of interventional radiology in brief.To strengthen the management of medical risk is an effective way to decrease malpractice and improve the safety of patients.The medical risk of interventional radiology possesses distinct characteristics,therefore the management should be strictly executed according to the principles.

Multiple myeloma (MM) is one of hot topics in the 54th ASH annual meeting.There were over 700 myeloma related abstracts in 2012.The abstracts reflected recent progress of MM researches and fell into 4 major groups,including new drug trials,frontline options,biology and molecular genetics,and myelodysplastic syndrome prior to the onset of myeloma and myeloma treatment.

Application ofmolecular diagnostic technique has shown greatpotential and technical advantages in the diagnosis and treatment of cardiovascular disease ( CVD ) .It can be used toscreening , diagnosis , treatment and prognostic evaluation of CVD disease .Early screening helps to notice the risk of the disease, make us take appropriate measures to reduce the health care costs and improve outcomes .To achieve the highest diagnostic efficiency by applying different molecular diagnostic strategies in different diseases.In term of treatment, molecular diagnostic technologies are mainly used in the drug discovery , personalized drug therapy and treatment options; In addition, prognostic assessment of CVD is also an important development direction of molecular diagnostic technique .However, there are severe challenges remained in applying molecular diagnostic techniques in CVD disease , such as the basic andclinicalapplication research and the quality control , etc.

The microRNAs is a kind of endogenous and non-coding small RNA ,which possesses biological function negatively regulating gene expression.Recent researches also found that artificial controlling some microRNAs ex-pressions can improve heart function via regulating skeletal myoblasts through multiple mechanisms,so may become a new breakthrough point in myocardial infarction treatment area.

Objective To investigate the causes of coma children in Pediatric Intensive Care Unit (PICU).Methods The causes of 210 children with coma were retrospectively analyzed.Results Among 210 cases,150 cases attributed to medical disease (71.43 ％),while 60 cases attributed to surgical disease (28.57 ％).110 cases were caused by infection(52.38％),58 cases were caused by cranioeerebral trauma (27.62％),while 31 cases involved in traffic accident(14.76％).Conclusion The main cause of coma in PICU is infectious diseases,but traffic accident trauma coma has been increased.It is positive to correct treatment and improve prognosis to recognize the cause as soon as possible.

Objective To evaluate the effects of total glucosides of paeony (TCP) on cell proliferation of and expression of VECF and IL-23 in human HaCaT keratinocytes and their potential mechanisms. Methods MTT assay was performed to detect the cell proliferation of HaCaT cells incubated with various concentrations (0.5 to 312.5 mg/L) of TGP. HaCaT cells were classified into 8 groups, control group without any treatment, TGP groups treated with 6 different concentrations of TGP, SB203580 group treated with TGP of 125 mg/L after 2-hour pretreatment with SB203580 of 10 μmol/L After additional culture, reverse transcription (RT)- PCR and enzyme linked immunosorbent assay (ELISA) were conducted to determine the expression levels of VEGF and IL-23 mRNA and protein, Western blot to test the phosphorylation of p38 mitogen-activated protein kinase (MAPK) in these cells. Results The proliferation of HaCaT cells was promoted by TGP of low concentrations (0.5 and 2.5 mg/L), but inhibited by TGP of equal to or more than 12.5 mg/L, and peaked at the concentration of 125 mg/L. TGP of 0.5 and 2.5 mg/L enhanced the mRNA and protein expressions of VEGF and IL-23, while TGP of 12.5 to 125 mg/L suppressed the expression of VEGF mRNA and protein, and TGP of 62.5 to 125 mg/L downregulated the expression of IL-23 mRNA and protein. The phosphorylation of p38 protein kinase in HaCaT cells was induced by TGP of 125 mg/L in a time-dependant manner. Concretely, the level of phosphorylated p38 kinase in HaCaT cells was 0.3314 ± 0.0245 (peak) at 5 minutes, decreased to 0.2173 ± 0.0189 at 10 minutes (still statistically higher than untreated HaCaT cells) and 0.1664 ± 0.0201 at 30 minutes after treatment with TGP of 125 mg/L. SB203580 attenuated the effect of TGP on p38 phosphorylation, and the level of phosphorylated p38 kinase was 0.1529 ±0.0147 in HaCaT cells pretreated with SB203580 prior to the treatment with TGP. Conclusion TGP can inhibit the cell proliferation of and expressions of VEGF and IL-23 mRNA and protein in HaCaT cells, likely mediated by the p38 MAPK signaling pathway.

Objective:To study the effect of melatonin(Mel),a potent antioxidant,on the oxidative stress and the activity of hypothalamo-pituitary-adrenal axis in diabetic rats.Methods:Male SD rats were assigned to the following 4 groups:normal control(treated with 2% ethyl alcohol lavage\[NC,n=6\]),diabetes mellitus control(treated with 2% ethyl alcohol lavage \[DM,n=7\]),diabetes mellitus model group 1(treated with Mel lavage \[10 mg?kg-1?d-1,DM+Mel1,n=6\]),diabetes mellitus model group 2(treated with Mel lavage \[0.2 mg?kg-1?d-1,DM+Mel2,n=6\]).Diabetes in DM group,DM+Mel1 group and DM+Mel2 group was induced by intraperitoneal injection of streptozotacin(65 mg/kg).Blood glucose,body weight and adrenal gland weight/body weight(AW/BW)were determined in the 4 groups 12 weeks later;malondialdehyde(MDA)was examined with visible spectrophotometry;blood total cholesterol(TC)and triglyceride(TG)were examined with enzymology method;blood corticotrophin-releasing hormone(CRH),adreno-corticotrophic hormone(ACTH)and corticosterone(CORT)were examined with radioimmune method.Results:Blood glucose,MDA,TC,TG,CRH,ACTH,CORT and AW/BW in DM group were significantly higher than those in NC group(P

Objective Different types of colon cancer have a big difference in their clinical features and prognosis.The article aimed to provide theoretical basis for the diagnosis and treatment of colon cancer patients by analyzing the differences of clinical features and survival rates between hereditary non-polyposis colorectal cancer (HNPCC) and sporadic colon cancer.Methods Retrospective analysis was made on 22 HNPCC cases and 105 cases of sporadic colon cancer in our hospital from January 2007 to January 2012 to get the clinical features and prognosis by comparative analysis.Results Compared with sporadic group, the early onset(under 40 years) (36.37％ vs 9.52％), mucinous adenocarcinoma (59.09％ vs 17.14％), low differentiation (45.45％ vs 16.19％), TNM stage (III+IV) (54.55％ vs 26.66％), lymph node metastasis (81.82％ vs 57.14％), multiple primary carcinoma (36.36％ vs 7.62％) and parenteral tumor (22.73％ vs 5.71％) were higher in HNPCC group, but the 5 year survival rate was lower in HNPCC group, and there were significant differences between two groups(P<0.05);but there were no significant difference in gender, tumor size, location and operation (P>0.05) between two groups.Multiple primary tumors were independent risk factors for survival in HNPCC group (P<0.05), lymph node metastasis and TNM stage were independent risk factors for survival sporadic group (P<0.05).Conclusion Compared with sporadic colon cancer, HNPCC is characterized by early onset, low differentiation, high incidence of multiple primary tumors and poor prognosis, which is of great importance to find HNPCC patients or suspicious HNPCC patients.

BACKGROUND:The inflammation of osteoarthritis is mediated by chondrocytes and the synovial tissue-secreted cytokines. Articular cartilage and synovial tissue contains a variety of cytokines, which play important regulatory role in the repair of articular cartilage injury.
OBJECTIVE:To analyze the relationship between chondrocytes, synovial tissue-secreted cytokines and osteoarthritis, as wel as the effect of chondrocytes and synovial tissue-secreted cytokines on osteoarthritis.
METHODS:A computer-based search was conducted in Wanfang database (www.wanfangdata.com.cn), PubMed database (www.ncbi.nlm.nih.guv/pubmed) by the first author from 2005 to 2010. The key words were“osteoarthritis, degeneration, cartilage tissue, cytokines”. A total of 146 articles were obtained through computer search, then reading the titles and abstracts for initial screen, 86 articles with the unrelated research purposes were eliminated, 40 articles with the repetitive content were excluded, and final y 21 articles related to the effect of various cytokines in the degenerative cartilage and synovial tissue of the osteoarthritis patients were included for further analysis.
RESULTS AND CONCLUSION:The cytokines mainly refers to the activated immune cel s and some stromal cel-secreted non-specific regulate immune responses and inflammatory responses-mediated smal molecule proteins, including lymphokines produced by the lymphocytes, as wel as the single nuclear factor and other cytokines produced by monocytes macrophages. Synovial cel-secreted cytokines may partial y explain the pathological process of osteoarthritis and play an important role in joint inflammation. Although, more and more scholars have pay attention to the effect of synovial cel s and cartilage cel-secreted cytokines, but mainly studies the effect of exogenous cytokines on chondrocytes or synovial cel s, and the effect of endogenous cytokines in the pathogenesis of osteoarthritis has not been extensively studied.