Child ; Chondrosarcoma, Mesenchymal ; diagnosis ; drug therapy ; pathology ; Diagnosis, Differential ; Humans ; Male ; Pelvic Neoplasms ; diagnosis ; drug therapy ; pathology ; Tomography, X-Ray Computed ; Treatment Outcome

Objective The regulation of ornithine decarboxylase (ODC) gene expression and enzyme activity by corticosterone, the main glucocorticoid in rat, during rat liver regeneration induced by partial hepatectomy (PH) was evaluated.Methods Bilateral adrenaleetomies (ADX) and sham-ADX were performed on ether-anesthetized rats 3 days before PH.Corticosterone in sesame oil was injected subcutaneously to adrenalectomied rats. ODC mRNA, ODC protein and enzyme activity were detected by RT-PCR, Western blotting and high performance liquid chromatography (HPLC), respectively. Results The ODC mRNA levels, protein accumulation and enzyme activity were lower in the intact liver compared to the regenerating liver.After PH, mRNA levels were remarkably enhanced in all groups (n=6 in each group) and peaked at 5 hours post-PH. Till 7 hours, the contents in all groups from high to low were ADX group,control group (Sham-ADX group), ADX treated with 10mg/kg and 40mg/kg body weight corticosterone group, respectively. ODC protein accumulation in ADX rats was higher than that in control rats (n=13, the same below), but it decreasod in corticosterone-treated (10mg/kg) rats until 24 hours post-PH, with a strong decline seen in 40mg/kg corticosterone-treated rats. ODC activity was rapidly promoted, and the highest levels were observed at 6 hours after PH in all groups (n=6 in each group). After corticosterone treatment, the activities declined significantly at 6 hours post-PH, with the lowest value found in the 40mg/kg group. Conclusion Corticosterone treatment results in dose-dependent decreases in ODC mRNA and enzyme protein both in the intact liver and the regenerating liver. The change in ODC activity is partially related to alterations of ODC mRNA and protein accumulation.

OBJECTIVE To strengthen occupational safety and health(OSH) management of medical service. METHODS To analyze actuality of OSH management and internal and international laws and regulations for OSH management,and give the proposition of its construction. RESULTS On the basis of the requirement,a set of OSH management scheme was established. CONCLUSIONS It is imperative that construct occupational safety and health management laws and regulations and system in medical service.They are pacing factors for physical and mental health of medical members.

OBJECTIVE To select applicable air disinfectors that can be used at indoor dynamic state to disinfect air in hospital.METHODS Some different air disinfectors were installed different volumetric rooms.To detect indoor air bacterial content before and after running the air disinfectors at quiet state and dynamic state.To evaluate the disinfection effect of these air disinfectors according to the eliminateion rates.RESULTS At quiet state,the indoor bacteria eliminateion rate exceed 90% after the air disinfectors running 0.5h.So the disinfection were qualified.At dynamic state,these air disinfectors showed good lasting disinfection effect.CONCLUSIONS The air disinfectors solve the problem of indoor air disinfection at dynamic state.It is imperative that select and use exactly the air(disinfectors) to get good disinfection effect.

Objective To observe the effect of transcranial low frequency electrical stimulation on the contents of monoamines in ischemic area of rats with middle cerebral artery occlusion(MCAO).MethodsPermanent MCAO model of Wistar rat was established with silk thread enveloped with polyammoniacum.The ischemic areas received various intensity of transcranial low frequency electrical stimulation for 1 hour in rats underwent 1 hour of ischemia.Then the affected tissue was processed with fluorospectrophotometry to determine the contents of dopamine(DA),noradrenalin(NE) and 5-hydroxytryptamine(5-HT).ResultsCompared with the sham-operation group,the contents of DA,NE and 5-HT in ischemic area of MCAO model rats decreased obviously(all P<0.01),while all three monoamines investigated in the sham-operation group with transcranial low frequency electrical stimulation had no significant change.In the MCAO groups stimulating with lower(10 V) and middle(30 V) intensity transcranial low frequency electrical field,the contents of DA,NE and 5-HT in ischemic area had no significant increase.But in the MCAO group stimulating with high(50 V) intensity transcranial low frequency electrical field,the contents of DA,NE and 5-HT in ischemic area increased significantly(P<0.05).ConclusionSome degree of intensity transcranial low frequency electrical field stimulation can increase the contents of DA,NE and 5-HT in ischemic area of rats subjected to MCAO.

A series of receptors expressed in the surface of tumor cells, which are able to mediate internalizing effect by specially connecting with corresponding ligands. These receptors are potential targets for drugs combined with conjugates. So the drug-conjugate compounds can be targeted delivery to tumor cells. The folate receptor is a promising target because of its marrow tissue specificity, its overexpression in malignant tissues, especially in myeloid leukemic cells, and its ability to bind and internalize folic acid conjugates. It is a promising potential method to apply folate receptor in the receptor-mediated targeting therapy of leukemic cells. In this review, the biological features of folate receptor, its chromosome location and its interaction with ligands, the distribution characteristics of folate receptor in normal and tumor tissues, especially in myeloid leukemic cells, and progress of research on folate receptor mediated targeting tumor cells, especially leukemic cells were summarized.
Antineoplastic Agents ; administration & dosage ; Carrier Proteins ; metabolism ; Drug Delivery Systems ; methods ; Folate Receptors, GPI-Anchored ; Folic Acid ; metabolism ; Humans ; Leukemia ; drug therapy ; metabolism ; pathology ; Receptors, Cell Surface ; metabolism ; Tretinoin ; administration & dosage ; Tumor Cells, Cultured

Objective To study the feasibility of TNF-α promoting migration of rat mesenchymal stem cells (MSCs) to local damaged tissues. Methods The MSCs was exposed to TNF-α at different concentrations and the expression rate of surface adheslon molecules and specific markers as well as their adhesion to endothelial cells were detected.Based on the above steps,the MSCs stimulated with the optimal concentration of TNF-α were obtained and were injected intravenously to the rats whose hindlimbs experienced ischemia damage.The rats were executed for achieving the muscle samples in the ischemic area,which were made into frozen section to count the number of MSCs. Results ( 1 ) Twenty-four hours after the TNF-o stimulation,the expression of adhesion molecule (VCAM-1) of MSCs increased in a concentration-dependent manner,while the expression of adhesion molecules (ICAM-1,L-Selectin and VLA4) of MSCs showed no significant changes.Besides,the expression rate of specific markers of MSCs was also obscure.(2) Exposed to 10 ng/ml TNF-o,MSCs presented an obviously increased ability in adhesion to the endothelial cells.(3) MSCs stimulated with 10 ng/ml TNF-α showed a larger number in the ischemia-damaged tissue of rat hindlimbs than that in the control group. Conclusion TNF-α at concentration of 10 ng/ml is effective within a short term in increasing VCAM-1 expression in rat MSCs and promoting the adhesion of MSCs to endothelial cells without affecting their character.

OBJECTIVE To give experimental basis for further investigation on Staphylococcus epidermidis biofilm resistance,we investigated the erythromycin repression of the planktonic,resuspended and biofilm cells.METHODS log Reduction of the planktonic,resuspended and biofilm cells of S.epidermidis strain 1457 and wild isolate S 68 was tested under 100 MIC erythromycin.The cells inside biofilm were observed by transmission electron microscope.RESULTS log Reduction of the planktonic and resuspended cells of S.epidermidis 1457 were 5.56?0.11 and 5.28?0.08,respectively,after 4h under 100 MIC erythromycin,which was higher than that of biofilm cells(P0.05).The tendency of the log reduction of isolate S 68 was the same as that of strain 1457.The cells of biofilm without erythromycin were spherical and of even distributed,but the swelling,liquefied cells and cell debris were observed in the biofilm with erythromycin after 12h.The arrangement of cells inside biofilm with erythromycin was looser than that without erythromycin.CONCLUSIONS The erythromycin resistance of biofilm cells is higher.Biofilm can give protection for the bacteria to avoid the killing of action by antibiotics.

OBJECTIVE To confirm the clinical disinfection effect of acidity electrolyzed oxidizing water(AEOW).METHODS According to the standards of disinfection techniques supplied by Health Ministry of China,the disinfection effect of health care worker,object surfaces and medical apparatus and instrument were investigated.RESULTS The log reduction of the bacteria on the hands,object surfaces and medical instruments were more than 1.00.The number of the bacteria on the endoscopes were 0-2 CFU per piece on average.No pathogenic bacteria were detected out.The disinfection effect of each experimental group was qualified.CONCLUSIONS The field disinfection effect of AEOW is accepted.

Objective To understand the cognition about healthcare-associated infection(HAI) management among directors in secondary and above hospitals in Shaanxi Province.Methods Questionnaire survey was adopted to investigate hospital directors who participated in The third session of Shaanxi Provincial HAI management training course for hospital directors.Results A total of 181 questionnaires were distributed, 173 (95.58％) were qualified.74.57％ of surveyed hospitals were secondary hospitals, 61.85％ were comprehensive hospitals, 67.05％ of respondents received HAI training in recent 3 years, 81.50％ and 55.49％ of hospital directors thought the main factors influencing the HAI management were health care workers'' awareness on HAI and leaders'' attention respectively.58.96％, 60.12％, and 46.82％ of hospital directors thought the director of HAI management department should have intermediate and above professional title, bachelor degree or above education, and preventive medicine professional requirements respectively.The awareness rate of HAI management-related knowledge was 86.71％, difference in awareness rate of HAI management-related knowledge among respondents of different job, gender, and HAI training in recent 3 years were all significantly different(all P<0.05).Conclusion Hospital directors'' cognition on HAI management affect the development of HAI work, strengthen the training on HAI knowledge among administrators can improve hospital administrators'' awareness on HAI prevention and control.