Strain NCIMB 10467, a lignin degrader, was reclassified as genus Burkholderia according to its 16S rDNA sequence. It seems that the metabolism of protocatechuate by this strain is diverse under the induction of various substrates. A 9505-bp DNA fragment extending from α conserved region of the gene, which encodes β subunit of orthocleavage protocatechuate 3, 4-dioxygenase(P34D; EC 1.13.11.3),was obtained by genome walking. Sequence analysis revealed two deduced open reading frames, pcaG and pcaH, encoding the α and β subunits of P34D respectively in this fragment. The P34D activity could be detected when pcaGH were expressed in E. Coli and the disruption of pcaH in strain NCIMB 10467 has lead to loss of its ability to catabolize protocatechuate. It was proved that the cloned pcaGH were encoding a functional protocatechuate 3, 4-dioxygenase which was necessary for the protocatechuate metabolism in this strain.

Objective To discuss the application of role reversal teaching in the clinical course of rehabilitation medicine. Methods 64 students of a vocational college under clinical practice were divided into traditional teaching group (n=30) and role reversal teaching group (n=34). The achievement of knowledge and practice tests were compared after course. Results There was no significant difference in the score of knowledge test between the groups before clinical practice (P>0.05), however, the scores of both knowledge and practice tests were higher in the role reversal teaching group than in the traditional teaching group (P<0.001). Conclusion The role reversal teaching may improve the achievement of students for clinical course of rehabilitation medicine.

Adult ; Antigens, CD20 ; metabolism ; Brain ; pathology ; Brain Neoplasms ; immunology ; pathology ; CD3 Complex ; metabolism ; Diagnosis, Differential ; Humans ; Leukocyte Common Antigens ; metabolism ; Lymphomatoid Granulomatosis ; immunology ; pathology ; Male

Objective To explore the value of somatostatin receptor scintigraphy(SRS) in evaluating the immune activity of orbital inflammatory pseudotumor associated with systemic vasculitis.Methods Twenty-five patients with orbital inflammatory pseudotumor associated with systemic vasculitis (10 males,15 females,average age:(51.2± 14.2) years) underwent SRS.The uptake ratio (UR) of orbital inflammatory pseudotumor was obtained.(1) Patients were divided into group A (with immune activity) and group B (without immune activity) according to Birmingham vasculitis activity score (BVAS).The difference of UR between the 2 groups was compared by two-sample t test.The difference of UR before and after treatment in 12 patients was also compared.(2) Based on the results by BVAS,ROC curve was used to obtain the cut-off value of UR,as well as the diagnostic efficiency and Youden index.The consistency between SRS and BVAS was calculated.(3)Patients were divided into two groups according to the cut-off value of UR and the prognosis difference between them was compared by Fisher exact test.(4)The expression of SSTR2 and SSTR5 was observed by immunohistochemistry.Results (1) UR in group A was significantly higher than that in group B (2.09±0.44 vs 1.32±0.46,t =5.94,P＜0.01).After glucocorticoids treatment,the UR in group A reduced significantly (t=4.07,P＜0.01),but not in group B (t=1.76,P＞0.05).(2)ROC curve analysis identified UR cut-off value as 1.66,with the sensitivity of 87.5％,specificity of 95.7％,positive predictive value of 95.2％,negative predictive value of 88.0％,accuracy of 91.3％ and Youden index of 83.2％.The consistency between SRS and BVAS was strong (Kappa =0.840).(3) The prognosis was significantly different between patients with UR≥ 1.66 and UR＜1.66 (P＜0.05).(4) The immunohistochemical results revealed high expression of SSTR2 and SSTR5 in inflammatory cells in patients with immune activity.Conclusion SRS has potential value in evaluating the immune activity of orbital inflammatory pseudotumor associated with systemic vasculitis.

Objective To evaluate effection of the myocardial protective in treatment of coenzyme complex to the VR patients .Methods Eighty patients who need to VR were divided into control group ( n=40) and coenzyme complex group ( n =40) with double -blind.The automatic recovery rate of heart beats after cardiac resuscitation , the changes of postoperative arrhythmia rate , postoperative serum CK-MB, cTnI in 12h in two groups were recorded .Results The automatic recovery rate of heart beats was higher in coenzyme complex group than that in control group , (85%vs 67%, P <0.05).The changes of postopera-tive arrhythmia rate (26%vs 38%), serum CK-MB, cTnI at clamp off of aorta, end of operation,6hour of postoperation and 12 hour of postoperation were lower in coenzyme complex group than those in control group respectively ( all P <0.05 ) .Conclusion Coenzyme complex shows positive protection of myocardial in the VR patients.

OBJECTIVE: To verify the biocompatibility between diamond-like carbon (DLC) film and human vascular endothelial cells and to provide evidences for construction of artificial mechanical valve prosthesis. METHODS: Nanophase DLC film was deposited using pulse laser deposition, while vascular endothelial cells derived from human umbilical vein was cultured with nanophase DLC film in vitro. Cell growth and adhesion were observed under inverted microscope, and cell proliferation was measured with MIT method. In addition, levels of nitric oxide (NO) and prostacyclin (PGI2) were measured in the DLC group and blank control group in order to evaluate their activities. RESULTS: Adhesion, proliferation, and growth of vascular endothelial cells derived from human umbilical vein were great on the surface of nanophase DLC film. There were no significant differences in the levels of NO and PGI2 between DLC group and blank control group (P > 0.05), showing that nanophase DLC film had no effect on activity of vascular endothelial cells derived from human umbilical vein. CONCLUSION: Nanophase DLC film has a good biocompatibility, and it can become an ideal material of tissue-engineering artificial mechanical valve prosthesis.

Objective To evaluate the imaging diagnosis value of glomus tympanicum tumors.Methods Images of 10 patients with surgically and pathologically confirmed glomus tympanicum tumors were reviewed.The image characteristics and diagnostic value were summarized.Results In 8 patients with high resolution CT scan and 2 patients with routine CT scan,soft tissue nodules within the tympanic cavity were identified on axial or coronal images in 7 of them.And in 3 patients with chronic tympanitis,glomus tympanicum tumors were not differentiated on CT images.Eight patients had undergone MR examination,on T2WI the tumors were moderate hyperintense(n=6)and hyperintense(n=2),and the tumors were enhanced obviously after contrast.In 3 patients with chronic tympanitis,moderate high signal of the tumor can be differentiated with the high signal of tympanitis on T2WI.On contrast MRI,the signal of enhanced tumor or unenhanced tympanitis was identified clearly.Conclusion On diagnosis of glomus tympanicum tumors,MRI is prior to CT,especially in patient with glomus tympanicum and tympanitis.

OBJECTIVE:To evaluate the rationality of cefoxitin use in our hospital. METHODS:Evaluation index and evalua-tion criteria were established on the basis of DUE. The relative weight of evaluation index were calculated by using attribute-based AHM weight method,and the gas between medical orders and complete rational ones were evaluated by using TOPSIS processing method. The proportion of rational medical orders were calculated to evaluate the rationality of drug use. RESULTS:Among 116 medical records,there were 19%reasonable medical orders(including 4.3%complete reasonable medical orders,5 cases),50%ba-sically reasonable medical orders(58 cases)and 31% unreasonable medical orders(36 cases). CONCLUSIONS:It is reasonable and feasible to use AHM weighted TOPSIS method to evaluate the rationality of cefoxitin. The utilization of cefoxitin in our hospital is basically reasonable,but there are still many problems.

Objective To understand the level of vitamin A (VA)in children in Beijing city.Methods 292 children aged from 0~14 years old visited the health clinic from November 2012 to March 2013 in Beijing city were surveyed by a question-naire,and medical history,physical examination,a blood sample was collected from each child,and serum VA was measured with reversed-phase high-performance liquid chromatography(HPLC).Results ①The mean serum VA concentration for the 292 children was (1.09 ± 0.29)μmol/L.②There were 5.8% (17/292)of children affected with subclinical VAD (SVAD),and 38.0% (107/292)had suspected SVAD (SSVAD).③Multivariate logistic regression analysis showed that parents were unware of health implications of VA,low VA intake and recurrent respiratory infection were associated with SVAD or SSVAD.Conclusion Low VA status remains a nutritional problem in children in Beij ing city.Multiple factors need to be considered together for them,such as parents were unware of health implications of VA,low VA intake and re-current respiratory infection.

Objective: To explore the changes of resting-state functional connectivity (FC) of bilateral precuneus and other brain regions in patients with minimal hepatic encephalopathy (MHE). Methods: Twenty-two liver cirrhosis patients with MHE (MHE group), 23 liver cirrhotic patients without MHE (NMHE group) and 24 healthy subjects (control group) underwent resting-state functional MRI (rs-fMRI). Bilateral precuneus was picked as seeds, and then FC of bilateral precuneus and other brain regions were calculated for statistical analysis by using standard seed-based whole-brain correlation method. Results: Compared with control group, the left precuneus showed reduced FC with the right superior frontal gyrus, left middle cingulate gyrus, while the right precuneus showed reduced FC with the right temporal pole, left superior temporal gyrus, bilateral frontal lobe and medial cingulum cortex in MHE group, and the left precuneus showed reduced FC with the right middle frontal gyrus, while the right precuneus showed reduced FC with the left precuneus and left middle cingulate gyrus in NMHE group (all P<0.05). Compared with the NMHE group, the left precuneus showed reduced FC with the right superior frontal gyrus, while the right precuneus showed reduced FC with the right insula and right superior/middle frontal gyrus in MHE group (all P<0.05). Conclusion: Abnormal resting-state FC of bilateral precuneus and multiple brain regions are demonstrated in patients with MHE, which may be the mechanism of endogenous neurological impairment of MHE.