Child, Preschool ; Epithelioid Cells ; Heart Atria ; pathology ; Heart Neoplasms ; Humans ; Perivascular Epithelioid Cell Neoplasms

Objective To study the effects of 900 MHz electromagnetic field(EMF)on DNA and the protein expression of p53 gene in human embryonic lung cells.Methods Single cell gel electrophoresis(SCGE)and Western Blot were used for the research.Results The results showed that 900 MHz EMF could not damage the DNA of human embryonic lung cells when the exposure time was 1 h and the exposure doses were 1,2,5 and 8 mW/cm2 respectively;900 MHz EMF could not affect the protein expression of p53 gene in human embryonic lung cells when the exposure time was 12 h and the exposure doses were 1,2,5 and 8 mW/cm2 respectively.Conclusion At the exposure doses in the present research,900 MHz EMF neither can damage the DNA of cells,nor can affect the protein expression of p53 gene,so the results can not sustain the issue that 900 MHz EMF may cause cancer.

With the development of organ transplantation for nearly half a century, currently the hot issues in clinical renal transplantation have already shifted to the application of low toxicity immunosuppressive drugs and their projects, as well as the research of technique which induces low or no immunity response to the specific donor. At present the main effective strategies of inducing immune tolerance are donor specific blood transfusion and donor specific bone marrow transplantation. This article summarizes the background, mechanism and clinical application of these two strategies.

Objective To explore adherence to highly active antiretroviral treatment(HAART)and related factors in dnlg users with HIV/AIDS.Methods From July to September 2007,111 HIV-infected drug users who received national free HAART were investigated in the HAART clinics in Hengyang,Yueyang,and Chenzhou districts of Hunan Province.A questionnaire of Community Programs for Clinical Research on AIDS(CPCRA)Antiretroviral Medication Self-Report Was used to assess adherence to HAART,and Zung Depression Scale and Adaptation Partnership Growth Affection Resolve Scale were used to assess patients'depression and family function respectively.ResllIts The average level of adherence to HAART was 83%.Among 111 patients.28.8%of patients reported poor adherence and took medication less than 90%.The mean score of depression was 60.8 1±13.03.There were 83.9%patients demonstrating depressive symptom and only 30.6%patients' family had good function.Logistic regression analysis showed that the degree of depression(β=-0.48,P=0.024)and treatment time(β=-1.11,P=0.036)were significantly associated with adherence negatively,while family function (β=0.65,P=0.043)and the time of being free from drug(β=0.55,P=0.040)were positively associated with adherence.Conclusion The level of adherence to HAART is low in the drug users with HIV/AIDS.Comprehensive interventions are needed to improve adherence to HAART,including managing depression,encouraging drug rehabilitation,improving family function,and evaluating adherence periodically.

Adult ; Female ; Humans ; Maxillofacial Abnormalities ; Nose ; abnormalities

Arsenic Poisoning ; diagnosis ; Humans ; Occupational Diseases ; diagnosis ; Occupational Exposure ; adverse effects

Adult ; Causality ; Cross-Sectional Studies ; Efficiency ; Female ; Humans ; Male ; Middle Aged ; Occupations ; Social Support ; Stress, Psychological ; Surveys and Questionnaires

Objective To explore the expression and significance of hedgehog signal molecules (Ptch,Smo and Gli1 ) in chronic pancreatitis tissues in rats.MethodsSixty SD rats were randomly divided into CP group (n =50) and control group (n =10).DBTC solvent (8 mg · ml-1 · kg-1 ) was injected into the rat via tall vein in CP group.In control group,rats were treated only with the solvent at a dose of 1ml/kg body weight.All rats were sacrificed 6 weeks later to observe the pancreatic pathologic changes.Collagen accumulation in pancreatic sections was determined by staining for Sirius red.Expressions of Ptch,Smo,Gli1 mRNA and protein in pancreatic tissues were assessed by RT-PCR and immunohistochemistry.ResultsThe rate of chronic pancreatitis development in rats in CP group within six weeks was 73.9％.Collagen content was markedly higher in CP group than that in control group [ ( 38.52 ± 6.49 ) ％ ~s (7.37 ± 2.28 ) ％,P ＜ 0.05 ].No Path,Smo,Gli1 protein expression was observed in normal pancreatic tissues in control group.The positive rate of Ptch,Smo,Gli 1 expression was 73.5％,64.7％ and 52.9％ in CP group,and the difference between the two groups was statistically significant (P ＜ 0.05).The expressions of Ptch,Smo,Gli1 mRNA were 2.38 ±0.42,3.85 ± 1.03,4.63 ± 1.49 in CP group,which were significantly higher than those in control group (0.23 ±0.16,0.14 ±0.05,0.57 ±0.12,P ＜0.05).ConclusionsThe Ptch,Smo,Gli1 was highly expressed in pancreatic tissues in CP rats,suggests hedgehog messenger pathway may play an important role in the chronic inflammation and fibrosis of chronic pancreatitis.

AIM: To investigate the relation between the changes of the cerebral microvasculature and the expression of plasminogen activator inhibitor-1 (PAI-1) in ischemic focal and perifocal areas after 2 hours focal cerebral ischemia with reperfusion in rats. METHODS: The changes of cerebral microvascular structure were observed by optical microscope and electric microscope, the expression of PAI-1 were assessed by immunohistochemical staining, Western blotting in ischemic focus and perifocal areas after focal cerebral ischemia with reperfusion. RESULTS: The edema of extra-cellular matrix and the hemorrhage of extravessels in ischemic focus and perifocal areas were most severe, and degradation and the defect of basement membrane were also observed after 6 hours and 3 days reperfusion following focal cerebral ischemia. The expression of PAI-1 decreased significantly compared with control group (P