Objective To clarify the combined ability of viral macrophage inflammatory protein (vMIP) to receptors through comparison research of vMIP binding to chemokine receptors of peripheral blood macrophages(PBMCs). Methods Combined ability of vMIP to receptors was measured with radioligand assay and identified with saturation, kinetic and specificity analyses. Results Kd is 11.1 nmol/L to human receptors of PBMC and 14.3 nmol/L to monkey receptors. The IC50 is 3.4 nmol/L to CCR5 and 4.5 nmol/L to CXCR4. Conclusion vMIP has high affinity with receptors and high specificity to CCR5 and CXCR4.This may be of great significance in the prevention and treatment of inflammation and HIV infection.

Adolescent ; Adult ; Head and Neck Neoplasms ; diagnosis ; pathology ; Humans ; Magnetic Resonance Imaging ; Male ; Meninges ; pathology ; Sarcoma ; diagnosis ; pathology ; Scalp ; pathology ; Skin Neoplasms ; diagnosis ; pathology ; Skull ; pathology

Adult ; Carcinoma, Renal Cell ; secondary ; Female ; Humans ; Kidney Neoplasms ; pathology ; Magnetic Resonance Imaging ; Vaginal Neoplasms ; secondary

Objective To explore the feasibility of evaluating the lung function by MSCT in emphysema.Methods The MSCT scan and pulmonary function tests(PFF)were respectively performed in 147 receptors within one week.They were randomly divided into 2 groups:group A(120 receptors), including normal,mild,moderate and severe abnormal pulmonary function based on the PFT,for comparing the correlation between pulmonary quantitative indexes of MSCT pulmonary function and PFT and settingup the primary grade criteria of abnormal pulmonary function in emphysema,group B(27 receptors)for evaluating the diagnostic accuracy in group A.The total lung was respectively scanned at the full inspiration and full expiration with MSCT.The pulmonary quantitative indexes of MSCT were measured with Siemens Pulmo pulmonary quantitative software.Results There was correlation between pulmonary quantitative indexes of MSCT and PFF.The Piex/in_(-910)showed best correlation with FEV_1%(r=-0.905,P

Female ; Humans ; Kidney Neoplasms ; complications ; pathology ; Ovarian Neoplasms ; pathology ; Wilms Tumor ; complications ; pathology ; Young Adult

Objective To investigate neuroprotective effect of AM-36 on secondary brain injury following traumatic brain injury(TBI)in rats.Methods A total of 38 male Sprague-Dawley rats were divided into an experimental group,a control group and a sham operation group,then sustained to moder- ate TBI.AM-36(0.1 ml/100 g)was administered intraperitoneally in the experimental group and isoton- ic saline solution was administered intraperitoneally in the control and the sham operation groups at 30 mi- nutes,24 and 48 hours after TBI,respectively.The brain water content was determined at 24 hours after TBI.Rats were sacrificed by decapitation at 24 hours or one week after TBI for observing histological changes in peripheral cortex,thalamus and hippocampus by means of Hematoxylin and Eosin staining and Fluoro-Jade(F-J)staining.Results The brain water content of bilateral hemispheres 24 hours after TBI in the experimental group was significantly decreased,compared to that of the control group.Histo- logical examination revealed less degenerating neurons(F-J positive neurons)in the cortex,thalamus, CAI and CA3 of the hippocampus in AM-36 treated rats 24 hours and one week after injury(P＜0.05). Conclusion Systemic administration of AM-36 at the early stage after TBI can decrease brain water content and exert neuroprotective effect on TBI.F-J staining can be used for histopathologic quantitation of neuronal damage,for it can accurately exhibit pathologic changes following TBI induced by fluid per- cussion.

OBJECTIVETo study the correlation between the lung pixel indexes of multi-slice spiral CT (MSCT) and pulmonary function test (PFT), and to explore the CT features of histograms of lung attenuation.

METHODSMSCT scan and pulmonary function test (PFT) were separately performed in 127 subjects within one week. The total lung was scanned with MSCT at full inspiration, full expiration, and normal respiration. The lung pixel indexes were measured by Pulmo pulmonary quantitative software. These indexes include PI(-910Huin), PI(-960HUEX), PI(-910Huin), PI(-960Huex), PI(-910(Hun), PI(-960Hun), PI(910Huex/in), and the histograms of lung attenuation.

RESULTSCorrelation existed between all the lung pixel indexes of MSCT and PFT. PI(-910Huex/in showed the best correlation with FEV1/FVC (r = 0.901, P < 0.01). Three distribution patterns were found in the histograms of lung attenuation of total lung, including double-peak distribution (n = 28), similar normal distribution (n = 81), and partial distribution (n = 18).

CONCLUSIONThe lung pixel indexes of MSCT have significant correlation with PFT and can be used to assess the pulmonary function.

Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Lung ; diagnostic imaging ; Male ; Middle Aged ; Respiratory Function Tests ; Tomography, Spiral Computed

OBJECTIVETo investigate the diagnosis and surgical treatment of adult Hirschsprung disease (AHD).

METHODSClinical data of 10 patients with AHD undergoing operation from May 1985 to May 2005 were analyzed retrospectively.

RESULTSThere were 7 males and 3 females with an age ranged from 14 to 40 years. All the cases had constipation, and were diagnosed by barium enema. Aganglionosis was located in distal sigmoid and rectum in 2 cases, in rectum in 7 cases, unknown in one case. Colostomy was performed in one, Ikeda s operation in 6, Rehbein operation in two,modified Swenson operation in one. After radical operation,7 patients had excellent continence function, one had good function, one had poor function.

CONCLUSIONSThe diagnosis of adult HD mainly depends on the history of constipation, barium enema and manometry examination. The pull-through procedures are effective surgical treatments for adult HD. The operation type should be selected individually.

Adolescent ; Adult ; Female ; Hirschsprung Disease ; diagnosis ; surgery ; Humans ; Male ; Young Adult

OBJECTIVETo establish an animal model visualizing orthotopic growth and metastasis of colorectal cancer.

METHODSpEGFP-N1 plasmid was transfected into human colorectal carcinoma cell line SW480 so that the resultant SW480/EGFP cells emitted fluorescence that could be detected externally by fluorescence stereo microscope. SW480/EGFP cells were inoculated subcutaneously in nude mice, and the orthotopic tumor growth was evaluated in real time. Whole-body visualization models of orthotopically implanted colorectal carcinoma was established surgically, and the tumor growth and metastasis are evaluated by conventional pathological methods.

RESULTSSW480/EGFP cells stably expressed high-levels of enhanced green fluorescent protein. Subcutaneous injection of SW480/EGFP cells resulted in tumor growth in nude mice, and the emitted fluorescence could be quantitatively detected and imaged with fluorescence stereo microscope to visualize real-time tumor growth. Visualization animal model was established successfully with surgical orthotopic implantation (SOI) of the tumor, and all mice survived. After two weeks, all the mice developed colorectal carcinoma without metastasis, but 4 weeks later, 75%percnt; of the mice developed peritoneal tumor metastasis and 50% had liver metastasis. The whole-body visualization animal model was successfully validated by pathological detection.

CONCLUSIONWhole-body visualization model of orthotopic and metastatic tumor growths provides a reliable means for observing the behavior of human colorectal carcinoma and can be helpful to study the growth and metastasis patterns of the cancer.

Animals ; Cell Line, Tumor ; Cell Transformation, Neoplastic ; Colorectal Neoplasms ; genetics ; pathology ; Disease Models, Animal ; Gene Expression Regulation, Neoplastic ; Green Fluorescent Proteins ; metabolism ; Humans ; Mice ; Mice, Nude ; Neoplasm Metastasis ; Whole Body Imaging

Objective To evaluate the development of the sphincter muscle complex(SMC)and defecation function in pediatric patients with congenital anorectal malformations(ARM).Methods A total of 64 children underwent MRI,among whom 39 were patients with ARM,and the others were patients without ARM undergoing MRI because of other dieases.The dimensions of the SMC in different planes were evaluated with different sequences and coils.The relationship between the SMC development and the defecation function was investigated.Results In control group,the absolute value of SMC width was (3.63?0.22)mm,which had a high correlation with age(r=0.998,P0.05).The SMCs in intermediate ARM patients[muscle index(MI)=0.47?0.05]and low ARM patients(MI=0.49? 0.05)were well developed.The SMCs in a portion of patients with high ARM(MI=0.28?0.06)were poorly developed,when MI≤0.18,anorectal contraction pressurewas significantly lower(t=3.55, P0.18[(0.85?0.20)vs(2.24?1.02)kPa].The length of anal canal with high-pressure[(10.88?3.64)vs(20.26?4.34)mm]was shorter(t=5.18,P0.18,the anorectal angle was less than 90 degrees,and normal continent function was found in 21 of 23 cases(91%).Conclusion MRI can be employed to evaluate the development of SMC in patients with ARM,MI was an objective criteria to evaluate the development of SMC.When MI≤0.18, maldevelopment of SMC will be highly suspected.