With the dose of D-galactose 80mg/kg by sc administration to the female NIH mice for 6 weeks,the sub-acute aging model was established. In order to observe the effect of the polysaccharide (PSP) on anti-aging, the mice were received PSP 200mg/kg^ 100mg/kg respectively by ig administration at the same time of injection D-galactose. It was found that PSP could remarkably antagonise the effect of D-galactose on the mice. The results showed that PSP could significantly(1)decrease the content of MDA in heart,liver and brain of the mice;(2)increase the SOD activity of RBCJiver and brain in the mice;(3)increase the GSH-Px activity and GSH content of the blood and liver of the mice; (4)inhibit the MAO-B activity of liver and brain in the mice;(5)increase the hydroxyproline content of dermal tissue in aging model mice. In short,it is suggested that PSP could obviously improve the aging effect of D-galactose on the mice.

BACKGROUND: The anterior thoracolumbar internal fixation devices can be divided into two main categories: the stick system such as kaneda,and the plate system such as Z-plate. Both categories have satisfactory biomechanical properties, but the devices of these types are all imported and so expensive that they exceed the affordability of domestic patients:Based on various anterior throacolumbar internal fixation devices and the spinal characteristics of the Chinese people, the author designed a new brand of anterior thoracolumbar internal fixation device for Chinese people:New Ti-plate (NTP).OBJECTIVE: Biomechanical properties of three anterior thoracolumbar internal fixation devices were compared in an attempt to provide a scientific and theoretical basis for clinical applications.DESIGN: A sampling investigation.SETTING: The Department of Orthopaedics of the Second Affiliated Hospital of Soochow University and Department of Radiology of Nantong Hongqiao Hospital.PARTICIPANTS: This study was carried out at the Biomechanical Engineering Research Institute of Shanghai University between May and August 2003. Fifteen fresh spinal samples from the healthy adults (T12-S1) were used in this study.METHODS: Fifteen spinal (T12-S1) specimens were obtained from fresh bodies to induce injuries to anterior and middle columns, which were fixed with Dunn Ⅲ, NTP and Z-plate respectively to compare the strength, rigidity, and the stability of the spine.MAIN OUTCOME MEASURES: Changes of load-straining and loaddisplacement of the three groups of specimens under the conditions of axial decompression, anteflection, post-extention, and lateral flexion.RESULTS: Fifteen fresh adult spinal specimens were involved in this study and all entered the stage of result analysis. Under the maximal load of 500 N,the average straining for Z-plate, NTP and Dunn Ⅲ was 410 uε,430 uε, 477 uε respectively. The average longitude displacement for the above three devices was 2.23 mm, 2.38 mm and 2.85 mm respectively.The thoracolumbar fracture was fixed with three anterior internal fixation devices and it was proved that Z-plate and NTP fixations were better than fixation with Dunn Ⅲ in respect of spinal strength, rigidity and stability (P ＜ 0.05), but the difference between Z-plate and NTP had no statistical significance (P ＞ 0.05).CONCLUSION: NTP and Z-plate devices are conformed to the spinal biomechanical principles and were capable of reconstructing spinal biomechanical stability effectively, and it is a preferable anterior spinal internal fixation device.

BACKGROUND:Intraarticular cocktail analgesic injection is a popular postoperative analgesia method and can effectively control postoperative pain and relieve side effects after total hip arthroplasty.
OBJECTIVE:To compare and assess the effectiveness and safety of intraarticular analgesic injection or intravenous injection of parecoxib after total hip arthroplasty.
METHODS:A total of 60 patients undergoing total hip arthroplasty were randomly assigned to:treatment group (intraarticular cocktail analgesic injection with morphine, bupivacaine, and compound betamethasone), and control group (intravenous injection of parecoxib). Al patients received tramadol hydrochloride at 24 hours after replacement. Analgesic consumption, visual analog scale at rest and during activity, range of motion, and postoperative complication of patients in each group were recorded.
RESULTS AND CONCLUSION:Intraarticular cocktail analgesic injection significantly reduced analgesic consumption. When comparing visual analog scale scores, rest pain scores were significantly less in the treatment group at 12, 24 and 48 hours after replacement than that in the control group (P<0.05). Scores on range of motion were significantly less in the treatment group at 24 and 36 hours than that in the control group (P<0.05). No significant differences in total complications were detectable between the treatment and control groups (P>0.05). Results suggested that intraarticular cocktail analgesic injection lessened analgesic consumption after replacement, relieved early pain after replacement, and contributed to early rehabilitation of patients. Moreover, no significant adverse reactions were visible.

Objective To establish a double reporter transgenic mice for monitoring Cre recombinase activity. Methods ZAP DNA fragment with lacZ and human alkaline phosphatase (hAP) gene was microinjected into the male pronucleus of 554 fertilized eggs from C57BL/6 mice. The founder mice and their progeny were screened for integration of transgene into the mouse genome by PCR and Southern blotting. The expression of lacZ transgene at early embryos from F1 generation mice was analyzed by X gal staining. Results A total of 398 survival ZAP DNA injected fertilized eggs were transfered to the oviducts of 21 pseudopregnant recipient mice. Of the 21 recipient mice, 13 became pregnancy and gave birth to 68 offspring mice. The zygote survival rate and birth rate were 71% (398/554) and 17% (68/398), respectively. Of the 68 offspring mice, 9 mice (5 males and 4 females) were identified by PCR and Southern blot analysis. Total integration rate and efficiency of transgene was 13% (9/68) and 1.6% (9/554), respectively. Nine mice as the founders were back crossed to set up F1 generation with other inbred C57BL/6 mice. Out of 9 transgenic mice, transmission of reporter gene in F1 offspring mice followed Mendelian rules, but the expression of lacZ protein was detected at the early embryonic stage (13.5 days postcoitum) in only 3 mice. Conclusion A double reporter transgenic mice for monitoring Cre recombinase activity is established.

0.05). There was no significant difference in radiation reaction and squeal between two groups. Conclusions The clinical results of LCAH radiotherapy may be improve the three year of local control rate than conventional CF in stage Ⅲ~Ⅳa but do not improve the survival rate of three years.The radiation reaction and sequela was similar,is worth further study.

Objective: To investigate the chromosomal aberration rate, micronucleus cell rate and the related factors of radiation workers in Changzhou, provide evidence for the occupational health and safety of radiation workers. Methods: Descriptive analysis of the chromosomal aberration rate, micronucleus cell rate and the related factors of 3021 radiation workers who conducted occupational health examination in the Changzhou Center for Disease Control and prevention in 2017, multivariate logistic regression was used to analyze the data. Results: The abnormal rate of chromosome aberration and micronucleus cells of 3021radiation workers in Changzhou were 1.32% and 3.34% respectively. The results of multivariate logistic regression showed that the exposure year (OR=1.501, 95%CI:1.078~2.089, P=0.016) was a risk factor for chromosome aberration. The risk of chromosome aberration in radiation therapy (OR=6.417, 95%CI:1.360~30.280, P=0.019) and interventional radiology (OR=4.598, 95%CI:1.688~12.524, P=0.003) was higher than that of industrial application. the exposure year (OR=1.245, 95%CI:1.007~1.539, P=0.043) is also a risk factor for micronucleus cell rate. The micronucleus cell rate abnormality Risk of nuclear medicine (OR=3.934, 95%CI:1.305~11.858, P=0.015) , radiation therapy (OR=3.802, 95%CI:1.101~13.128, P=0.035) , and interventional radiology (OR=2.953, 95%CI:1.324~6.584, P=0.008) is higher than industrial application. Conclusion The chromosome aberration rate and micronucleus rate of workers who are exposed to low dose ionizing radiation for long time are related to the exposure year of radiation workers and the occupational categories involved.

AIM: Open reading frame(ORF) of death associa ted protein kinase1(DAPK1) gene was cloned for studying on tumor forming and met astasis.METHODS: Based on nucleotide sequence of DAPK1 gene f rom GenBank, a pair of primers was designed. DAPK1 gene ORF was transfected into Raji cells in expression vector pcDNA3.1(+) with lipofectamine reagent. Morphol ogic assessment of apoptosis was performed with fluorescence microscope cytotoxi city and cell viability was assayed by MTT. RESULTS: DAPK1 gene ORF was amprified from K562 cells by RT-PCR. It was cloned into plasmid pMD18-T and sequenced. There were seven mutation in 4 300 bp nucleotide sequence rel ativel y to DAPK1 nucleotide sequence from GenBank, but six was synonymous mutation and one was single nucleotide polymorphism. 4 300 bp nucleotide of DAPK1 gene O RF was transfected into Raji cells. DAPK1 gene expression was detected in 48 h a fter it was transfected into Raji cells. Then Raji cells showed apoptosis.CONCLUS ION: Large fragment gene was cloned by RT-PCR and transfected into Raji cells successfully. Over-expression of DAPK1 gene induced Raji cells apoptosis.

AIM: To inhibit the expression of tyrosinase gene in murine B16 melanoma cells by antisense nucleotide. METHODS: The antisense recombinant pcDNA3.1(-)-tyr was constructed and was used to infect murine B16 melanoma cells for expression of tyr antisense nucleotide. The effect of antisense nucleotide of tyr on the expression of tyr gene was detected by determination of the activity of tyrosinase and of the production of melanin, Dopa staining and electronic microscope. RESULTS: The tyr antisense recombinant was successfully constructed and injected into murine B16 melanoma cell. The activity of tyrosinase in B16 cells infected with pcDNA3.1 (-)-tyr decreased to 0.0498?0.0036, compared to the tyrosinase activity of 0.0916?0.0132 in the control cells without treatment (P

Objective: To provide clinicians with diagnostic strategy and techniques for adrenal tumor by evaluating various imaging studies.Methods: The accuracy of localizing and qualitative diagnosis was analyzed by comparing various imaging examination with pathological findings after surgery combined with centesis by BUS.The clinical data of 112 patients with adrenal tumors were analyzed.Results: The pre operation lesion localizing accuracy with BUS,CT and MRI was 85.71%, 95.54%, and 98.14%,respectively.The qualitative accuracy with the same modalities as above were 33.33%,65.69%, 79.63%, respectively.For combining different imaging examination group, the accuracy of localizing and qualitative diagnosis was 100% and 86.92%,respectively.Tolally 102 cases were treated by operation and were surgically cured, of which 9 cases were treated with intervention therapy,30 cases had large tumors(exceeding 10.0 cm? 5.0 cm? 4.0 cm). Conclusion:The diversified diagnostic imaging should be applied orderly and rationality.BUS can be used as a screening method.CT and MRI are accurate in localization and differentiation of benign and malignant.Combination of various examinations has the advantages of different modalities and greatly increase the diagnostic accuracy.We should select right incision. Sufficient preparation during perioperation can reduce the complication.

AIM To investigate the effects of tranfection of IL 2R antisense RNA expression plasmids on mouse spleen cells' proliferation in vitro and its possible mechanism. METHODS Spleen cells were transfected with IL 2R antisense RNA eukaryotic expression plasmids using adhesion assisted lipofection method, and then the spleen cells were stimulated by mitogen. Cells' proliferation was tested by tetrazolium salt (MTT) method. IL 2R mRNA and protein expression level were measured by slot blot hybridization assay and flow cytometry method respectively. RESULTS The proliferation of spleen cells was inhibited obviously after transfecting with recombinant plasmids. The inhibitory rate of pcAnti mIL 2R?? and pciAnti mIL 2R?? transfected group was higher than that of pcAnti mIL 2R? and pcAnti mIL 2R? transfected group; the inhibitory rate of pcAnti mIL 2R? tranfected group was higher than that of pcAnti mIL 2R? tranfected group. No inhibitory effect on the growth of NIH3T3 cells was observed when they were transfected with recombinant plasmids. IL 2R mRNA and protein expression level were decreased in spleen cells after transfection of recombinant plasmids. CONCLUSION IL 2R antisense RNA can efficiently inhibit the proliferation of mouse spleen cells in vitro. IL 2R?? chimeric antisense RNA showed higher inhibitory rate than ? or ? antisense RNA. IL 2R? antisense RNA was more effective than ? antisense RNA. It can be concluded preliminarily that the inhibitory effect of IL 2R antisense RNA was exclusively on the growth of cells functionally expressing IL 2R. The inhibitory effect on the spleen cells proliferation was likely due to the blocking of IL 2R expression by antisense RNA.