Objective　To study the effects of systemic irradiation and conglutinant drug W11-a12 on the number and some functions of wound nentrophils (Neu). Methods　Wound Neu was collected from sponges which were implanted in rat's dorsum incision. The number of Neu, as well as the phagocytic function and motility of wound Neu were measured. Results　After 4,6,8 Gy systemic irradiation, the number of white blood cells and Neu in wound, as well as the phagocytic function and chemotactic motility of wound Neu, were significantly decreased at 24 h, 48 h after wounding. W11-a12 markedly increased the number of wound Neu, improved the phagocytic function and chemotactic motility of wound Neu at 24 h, 48 h after wounding despite the rats were radiated or not. Conclusion　The results indicated that the decreased number and function of wound Neu in the early stage of wound healing contributed to the impairment of repair after systemic irradiation. W11-a12 accelerated normal and irradiation-impaired wound healing partly by increasing the number of wound Neu and improving the Neu function.

Objective To analyze the epidemiologic characteristics of epidemic hemorrhagic fever syndrome (EHF) from 2004 to 2010 and provide scientific basis for formulating control measures.Methods Epidemiological data of EHF between 2004 to 2010 were obtained from the“National Disease Surveillance Report on Management Information System”,and the population data were from the“National Disease Surveillance Information Management System for Basic Information Report System”.Descriptive epidemiological methods was used for statistical analysis.ResultsA total of 173 cases were reported in Qian'an from 2004 to 2010.From 2004 to 2010,the cases were 86,67,12,1,0,1,and 7 cases,respectively,and the rate were 13.12/10 million ( 86/640 249 ),10.42/10 million (67/642 688 ),1.86/10 million ( 12/645 124),0.15/10 million (1/647 983 ),0(0/650 720),0.15/10 million( 1/653 839),and 0.11/10 million(7/657 380),respectively.The overall rate was 3.86/10 million(25/648 283) of population.From 2004 to 2008 the incidence reported declined rapidly,then increased slowly after 2009.The cases were found intensively in winter(November - next January) and spring season (february - may).The incidence in the age group of 10 - 45 was higher than that of other age groups,and the total number of cases was 82.08％(142/173).The incidence in males( 114 cases) was higher than that of females(59 cases).Occupational distribution mainly to peasants and students,which accounted for 87.86％ (152/173).Conclusions Epidemic in the city declines rapidly follows by a slow recovery,suggesting that in the future surveillance,mice-killing and protection of vulnerable population should be strengthened.

OBJECTIVETo evaluate clinical applicability of a novel technique that can quantify the lamivudine-resistant mutants of hepatitis B virus (HBV) in the serum of patients utilizing gene microarray technology.

METHODSThe oligonucleotide microarray was designed to detect 3 important mutational positions. Fifty-one patients who were receiving lamivudine therapy were selected as subjects. The oligonucleotide microarray and traditional sequencing were applied to detect the lamivudine resistant mutation, the monitoring lasted for 24 months. Then the clinical result was analyzed and the obtained data were compared between the two methods.

RESULTSLamivudine resistant mutation was detected in 39 percent of the patients during the 2 years period. The results of the oligonucleotide microarray technique was consistent to the results of traditional sequencing in accuracy and the miroarray was more sensitive in detection of the mixed infection.

CONCLUSIONApplication of the oligonucleotide microarray for quantitative detection of lamivudine-resistant mutation of HBV is feasible.

Antiviral Agents ; therapeutic use ; Drug Resistance, Viral ; Female ; Hepatitis B ; drug therapy ; virology ; Hepatitis B virus ; drug effects ; genetics ; isolation & purification ; Humans ; Lamivudine ; therapeutic use ; Male ; Mutation ; Oligonucleotide Array Sequence Analysis ; methods

Adult ; Blast Injuries ; therapy ; Explosions ; Humans ; Male ; Multiple Trauma ; therapy

Objective To evaluate the value of three-dimensional contrast-enhanced angiography (3D CE MRA) and MRI in the diagnosis and delineation of cerebral arteriovenous malformation(AVM). Methods Twenty-two cases of cerebral AVM examined by MRI and 3D CE,MRA.DSA was performed in 17 cases.A three-dimensional fast low angle shot (3D FLASH) was used for 3D CE MRA with Gd-DTPA dosage of 0.2 mmol per kilogram for body weight.The source images were subtracted from mask images and transferred to computer workstation using three-dimensional reconstruction.Results Among 22 cases, 19 showed typical AVM“flow void”signal on MR images.3D CE MRA clearly displayed the nidus,feeding artery and draining vein.All of the foci were above the cerebellum tentorium.13 located within one lobe, 3 exceeded one lobe and 3 situated in the deep of cerebrum.Feeding arteries were derived from single artery in 9 cases,and mixed supply in 10 cases.Draining veins diverted to sagittal sinus and/or sigmoid sinus in 6,deep cerebral veins in 8 and mixed in 5.In the 14 cases examined by both DSA and 3D CE MRA,3D CE MRA was superior to DSA in three-dimensional demonstration of the nidus,but inferior to DSA in demonstration of some details.3D CE MRA depicted 78.4% feeding arteries and 84.0% draining veins in addition,tiny pathologic blood vessels smaller than 1 centimeter were detected by DSA,but could not be found by 3D CE MRA and were only shown as hemorrhage lesions on MR images in 3 cases.Conclusion As a non-invasive technique,3D CE MRA combined with MRI is accurate in diagnosis and localization of cerebral AVM,and should be used as the first choice for those clinically suspected of AVM.But DSA remains needed for demonstration of details and tiny AVM.

0.05),the mean FA on the left was higher than the right(t=1.912,P

Objective　To observe some biological features of bone marrow mesenchymal stem cells and explore the best conditions for isolatin g and culturing in vitro. Methods　Common cell culture techn ique, light and electron microscopy were used to study the effects of the growth , proliferation, morphology of the bone marrow mesenchymal stem cells in differe nt adherent time, concentration of serum and cell density. Results　The best culture condition in vitro for growth was 4-24 hours adherent time, 5%-10% fetal bovine serum, (4-8)×104/ml cell density. The cells were sp indle in shape and had a strong ability of proliferation. The time for cell duplication was 3 to 4 days. The cells showed the characteristics of stem cell s in electron microscope. Conclusion　The best condition for iso lation and culture of bone marrow mesemchymal stem cells was successfully establ ished and some biological features were obserred. It found a base for further in vestigation and using of mesenchymal stem cells.

OBJECTIVE: To compare the iterative decomposition of water and fat with echo asymmetry and the least-squares estimation (IDEAL) method with a fat-saturated T2-weighted (T2W) fast recovery fast spin-echo (FRFSE) imaging of the spine. MATERIALS AND METHODS: Images acquired at 3.0 Tesla (T) in 35 patients with different spine lesions using fat-saturated T2W FRFSE imaging were compared with T2W IDEAL FRFSE images. Signal-to-noise ratio (SNR)-efficiencies measurements were made in the vertebral bodies and spinal cord in the mid-sagittal plane or nearest to the mid-sagittal plane. Images were scored with the consensus of two experienced radiologists on a four-point grading scale for fat suppression and overall image quality. Statistical analysis of SNR-efficiency, fat suppression and image quality scores was performed with a paired Student's t test and Wilcoxon's signed rank test. RESULTS: Signal-to-noise ratio-efficiency for both vertebral body and spinal cord was higher with T2W IDEAL FRFSE imaging (p < 0.05) than with T2W FRFSE imaging. T2W IDEAL FRFSE demonstrated superior fat suppression (p < 0.01) and image quality (p < 0.01) compared to fat-saturated T2W FRFSE. CONCLUSION: As compared with fat-saturated T2W FRFSE, IDEAL can provide a higher image quality, higher SNR-efficiency, and consistent, robust and uniform fat suppression. T2W IDEAL FRFSE is a promising technique for MR imaging of the spine at 3.0T.
Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Image Interpretation, Computer-Assisted ; Magnetic Resonance Imaging/*methods ; Male ; Middle Aged ; Signal-To-Noise Ratio ; Spinal Diseases/*diagnosis/pathology ; Statistics, Nonparametric

No abstract available.

OBJECTIVEHematologic relapse remains the greatest obstacle to the cure of acute lymphoblastic leukemia (ALL), especially T-lineage acute lymphoblastic leukemia (T-ALL) in children. Recent studies have shown that patients with increased risk of relapse can be identified by measuring residual leukemic cells, called minimal residual disease (MRD), during clinical remission. Current polymerase chain reaction (PCR) methods, however, for measuring MRD are cumbersome and time-consuming. To improve and simplify MRD assessment, the author developed a real-time quantitative PCR (RQ-PCR) assay for the detection of leukemic cells that harbor the tal-1 deletion. In addition, the author discussed the significance of MRD levels at different stages in treatment and prognosis of children with T-ALL.

METHODSA total of 50 consecutively enrolled patients with T-ALL were analysed for detection of leukemic cells harboring the most common tal-1 deletion. Serial dilutions of leukemic DNA were studied to find the sensitivity of detection with RQ-PCR assay. The MRD of 28 samples in clinical remission from 10 patients were quantified by RQ-PCR assay and limiting dilution assay. The results detected by both methods were compared statistically with correlation analysis.

RESULTS(1) A total of 10 patients presented tal-1 deletion involving the sildb1 breakpoint rearranged to tal1db1 in 50 cases with T-ALL. The breakpoints of relapsed samples are the same as those of the corresponding diagnostic samples; (2) The RQ-PCR assay had a sensitivity of detection of one leukemic cell among 100,000 normal cells. In 24 samples, MRD levels > 10(-5) could be detected with both methods. The percentages of leukemic cells measured by the two methods correlated well (r = 0.898, P < 0.001); (3) The MRD levels of 3 patients out of the 8 cases undergoing disciplinary regimen were over 10(-4) at the end of induction chemotherapy. They all relapsed in bone marrow during chemotherapy. The higher the MRD levels, the earlier the relapse. The other 5 patients with MRD levels < 10(-4) had been relapse-free survival (RFS) for 4-59 months, one of whom with increased MRD levels > 10(-4) for twice at the continuation stage had been RFS for 27 months till now.

CONCLUSIONSThe sildb1-taldb1 deletion presents in 20% of T-ALL, and is an ideal PCR marker for its specificity, uniform and stability; The tal-1 RQ-PCR can be used for the rapidly, sensitively and accurately quantitative assessment of MRD in T-ALL with the tal-1 deletion. MRD levels at different stages of chemotherapy have different significance in prognosis and treatment.

Adolescent ; Base Sequence ; Basic Helix-Loop-Helix Transcription Factors ; genetics ; Child ; Child, Preschool ; Female ; Gene Deletion ; Humans ; Male ; Molecular Sequence Data ; Neoplasm, Residual ; diagnosis ; Polymerase Chain Reaction ; methods ; Precursor T-Cell Lymphoblastic Leukemia-Lymphoma ; diagnosis ; genetics ; mortality ; Prognosis ; Proto-Oncogene Proteins ; genetics ; T-Cell Acute Lymphocytic Leukemia Protein 1