Objective To evaluate the diagnostic and differential diagnostic effects of ultrasound in testicular tumors and tumor-like lesions.Methods Ultrasound features of 33 cases of testicular masses were reviewed and the results were compared with pathological findings.Results For the 33 cases of testicular masses,12 cases were diagnosed as seminoma,6 cases as lymphoma,6 cases as epidermoid cyst,2 cases as mixed germ cell tumor,2 cases as teratoma,1 case as embryonal carcinoma,1 case as endodermal sinus tumor and 3 cases of the other tumor.Conclusions Ultrasound has important value in the diagnosis and differential diagnosis of testicular tumor and tumor-like lesions,and it can be considered first choice of clinical imaging examination.

Purpose To construct expression vector of Fas extracellular region gene(eFas) ,to express and purify recombination protein and to prepare polyclonal antibody, which have laid a foundation of studying its function. Methods The eFas gene encoding sequence was acquired through overlapping PCR, and pET-22b ( + )/eFas expression vector was constructed. Then this vector was transformed into E. coli Rosetta-gami. Re-combinant protein was expression being induced by IPTG,and was purified using Ni-NTA matrix of affinity chromatograph. The purity of recombination protein was identified by SDS-PAGE. Hereafter, the purified eFas recombinant protein was immunized to New Zealand white rabbit in order to prepare polyclonal antibody. The titer of polyclonal antibody was determined by ELISA. Results The encoding sequence and expression vector of eFas was obtained while the interest protein was mainly expressed in the inclusion body. The eFas fusion protein's expression quantity accounts for more than 30% proportion of total E. coli protein. The eFas protein we obtained was provided with the purity of at least 95 % . Conclusion The successful constrution, expression and purification of FasL fusion protein and preparation of polyclonal antibody will provide some material for further studies of Fas.

A 54-year-old man was admitted to the Department of Rheumatology in Peking Union Medic.al College Hospital due to polyarthritis.back pain and multiple subcutaneous masses.He had symmetrical polyarthritis at onset.which was diagnosed as theumatoid arthritis.His follow-up and treatment were irregular.Back pain and multiple subcutaneous masses developed 2 year ago.Erythrocyte sedimentation rate and C-reac.tive protein were elevated.Rheumatoid fac.tor and Anti-cylic citrullinated peptide antibody were positive.No evidence of infection or malignancy was detected.Chest CT suggested pulmonary fibrosis and osteolytic lesions of stemum.Spinal MRI showed paravertebral soft tissue.Biopsy of the soft tissue suggested the pathologic.al finding of a theumatoid nodule.The patient was diagnosed as theumatoid arthritis complic.ated with multiple theumatoid bursal cysts.Combination therapy of methylprednisolone (40mg/d) and cyclophosphamide (0.4g/w) lead to a rapid improvement of clinical symptoms and laboratory parameters.The patient was still in remission at 6-month follow-up.

Objective:The purpose of this study is to evaluate the effects of a single-chain antibody against death receptor 5 (ZF1) on tumor growth and survival in murine H22 hepatocellular carcinoma tumor model.Methods:Killing effect of ZF1 on H22 cells was analyzed by MTT assay in vitro. The apoptosis rate of H22 cells induced by ZF1 was detected using Flow Cytometry assay. The transplanted model of H22 tumor was developed in mice. The mice were randomly divided into four groups, PBS group, ZF1 group, EPI group and combined treatment group of ZF1/EPI. Tumor growth and body weight changes were observed. After treatment over 13 days, the tumor tissue for HE staining and TUNNEL assay was performed to detect apoptosis.Results:The results showed that ZF1 could inhibit growth of H22 cells in a dose dependent manner. The growth inhibition rate was up to 84.5%. The results showed that ZF1 alone or in combination with ZF1/EPI, the tumor growth was significantly inhibited. HE staining and TUNNEL analysis showed that ZF1 could effectively induce apoptosis of tumor cells without toxic effects, especially in ZF1/EPI combined treatment group.Conclusion:It is showed that ZF1 induces a good inhibition on the proliferation of H22 cell, especially in combined treatment group of ZF1/EPI.

This research was to study the regulation of intravenous administration of human umbilical cord blood mesenchymal stem cells (HUCBMSCs) on secretion of neural specific protein in rats after traumatic brain injury (TBI), and to explore its mechanisms promoting the recovery of neurological function. The TBI models of rats were established. We then injected HUCBMSCs, labelled by Brdu (5-bromo-2-deoxyuridine), into the TBI rats via the tail vein using modified Feeney free-falling method. The levels of neural biochemical indicators (serum S100β protein, NSE, LDH, CK) of rats were detected in shamed group, injury group and HUCBMSCs-transplanted group. And the morphological changes of brain tissue of rats in the three groups were observed by using HE staining under light microscope. During the whole experiment no immunosuppressant was used for the four groups. From the research, transplant-related death of the rats was not found in transplantation group. In the injury group, rises were found in contents of serum S100β protein, NSE, LDH, CK in the early stage after the rats were injured, which were much higher than those in shamed group at correspondent time point (P < 0.01). In HUCBMSCs-transplanted group, although these biochemistry indexes were found rising for a short period in the early stage, along with the time, these indexes were obviously lower than in those injury group (P < 0.05). Under light microscopy pathological changes of rats in HUCBMSCs-transplanted group were much slighter than those in injury group. It was well concluded that in the situation of no immuno-suppressants, the intravenous-injected HUCBMSCs could reduce the secretion of serum S100β protein, NSE, LDH, CK, promote the repair of tissue injury effectively, and promote the functional recovery of neurons.
Animals ; Biomarkers ; chemistry ; Brain ; pathology ; Brain Injuries ; therapy ; Cord Blood Stem Cell Transplantation ; Humans ; Mesenchymal Stem Cell Transplantation ; Neurons ; chemistry ; Rats

Objective To analyze the clinical data of diagnosis and treatment of Wegener' s granulomatosis (WG) in order to understand the nature of this disease. Methods The clinical data including clinical manifestations,laboratory findings imaging features,pathological changes and efficacy of treatment of 34 patients with WG admitted from January 2002 to March 2012 were analyzed.Results Of the 34 patients,male to female ratio was 18 to 16,and the average age subjected to WG onset was (45 ± 15)years old ranged from 18 to 81 years old.The average duration before the diagnosis confirmed was ( 140 ±72) mouths,while 29.4％ was diagnosed within 3 months. The presenting symptoms included initial involvements in lung (41.1％),nose (38.2％ ),eyes ( 11.7％ ),ear (8.8％ ) and constitutional symptoms such as fever (26.4％ ). Throughout the whole disease course,the incidence of systemic impairments were as follows:lung (76.4％),nose (73.5％),kidney (67.6),eyes (58.5％),ear (47.0％),nervous system (41.1％),oral ulcer (20.5％ ).Of laboratory findings,C - ANCA/PR3 -ANCA was positive in 61.7％ patients,P - ANCA/MPO - ANCA positive in 20.5％ patients,ANCA negative in 11.7％ patients,P- ANCA positive with MPO- ANCA negative in one patient (2.9 ％ ) and C -ANCA positive with PR3 and MPO positive in one patient (2.9％ ).Of imaging findings,nodules or masses were most commonly observed (34％), followed by fibrotic lesions (20.5％ ), cavitations ( 17.6％ )、opacities ( 17.6％ ).Typically pathological triad ( vasculitis,necross and granuloma formation)was found in one patient ( 4.3％ ),while two pathological changes of the triad occurred in 10 patients (43.4％). Pulmonary infection was highly prevalent (50％), and of them,20.5％ patients were misdiagnosed as tuberculosis,malignancy or abscess.After admission,high dose of corticosteroids and cyclophosphamide were administered as bolus and maintenance therapy. Plasma exchange,intravenous immunoglobulin,and rituximab were added for refractory cases and optimal response were obtained in most cases.Conclusions Wegeners granulomatosis is a clinically complicated entity and sometimes can have progression,leading to misdiagnosis. Early and prompt use of steroids and cyclophosphamide may confer good therapeutic efficacy and avoid life -threatening complications.

Objective To observe homing of mesenchymal stem cells (MSCs) in immune organs and inflammatory joints in collagen induced arthritis(CIA) rats. MethodsRats MSCs were isolated and expanded from bone marrow cells by density gradient centrifugation and adhering to the culture cell walls, and the phenotypes were assessed by flow cytometry. MSCs were labeled by PKH-26 and Brdu. Sixty-four rats were randomly divided into normal group and CIA group. Every 8 rats were sacrificed at 3, 11, 30, 42 days after transplantation of MSCs. At the end of the experiment, the specimens of thymus gland, spleen, ankle joints were exposed, fixed, decalcified, wrapped and cut into slices. Confocal laser scanning microscope and immunohistochemical method were used to observe migration and distribution of MSCs in different organs. Independent samples group t test with SPSS 12.0 software package was used for statistical analysis. ResultsIt was found that allogenic MSCs could stay in spleen, thymus gland and joints of CIA rats for a relatively long period (42days). Forty-two days after transplantation of MSCs, the average grey scale values of spleen and thymus gland in CIA group(37.5±8.8, 29.9±5.9 respectively) were significantly higher than the normal group(16.0±2.3,13.2±4.3 respectively), the average grey scale values of ankle joints in CIA group 78±8 was significantly lower than the normal group 93±14(P<0.05). ConclusionIt has been found that MSCs can stay in the injured tissue and organs preferentially.

Objective To investigate the mechanical prosperity and degradation rate of the scaffolds with compounding collagen and the nano sol-gel derived bioactive glass were studied,and provide the theoretical basis for the further application of collagen based scaffolds.Method The scaffold with compounding collagen and the nano sol-gel derived bioactive glass(58S)were prepared using the freeze-drying techniques with the bioactive glass as phase addition.By affecting the aggregation state of the collagen fibers with adjusting the supplementation of bioactive glass to change the microstructures of the compound scaffolds and finatly the compound scaffolds with different mechanical properties were prepared.Results (1)As the aggregation state of the collagen fibers changes,the scaffolds with the coarser collagen fibers is prepared with the diameters 400-600 nm approximately.The coarser collagen fibers will play an important role in improving the mechanical property and slowing down the degradation rate of the collagen based scaffolds.(2)The interactions between bioactive glass and collagen are studied by FTIR and Raman technologies.When the quality of content of collagen in the compound scaffolds is lower than 20%,the secondary structure of collagen is damaged severely.Conclusion The composite scaffolds with the mass ratio of collagen to bioactive glass 40:60 has the best performance in mechanical property and degradation,which will be helpful for further applications.

Salmonella is the main food-borne pathogen that causes food poisoning and gastroenteritis in human and ani-mals .The type III secretion system in Salmonella has played an important role in the invasion of host cell .In recent years ,the research of the composition ,assembly and related pathogenesis of Salmonella T3SS have made some progress .This article re-views the composition and assembly of Salmonella type III secretion system ,which could provide further study the pathogene-sis of Salmonella and also the new strategies and methods toward the treatment and prevention of Salmonella infections .

Aim To investigate the effect of ASIC1 a ( acid-sensing ion channel 1 a ) on the pathological change of diabetes complication liver fibrosis and the proliferation and activation of hepatic stellate cell ( HSC-T6 ) stimulated by PDGF-BB under hyperglyce-mia. Methods Diabetes rats model was established by streptozotocin ( STZ) , and liver fibrosis rats model was induced by carbon tetrachloride ( CCl4 ) . Then, the liver extent of damage and the expression of ASIC1 a were observed in the diabetic rats, liver fibrosis rats and diabetes complication liver fibrosis rats. In vitro, after pretreated with amiloride, HSC-T6 was treated with high glucose for 24 h and then stimulated with PDGF-BB for another 24 h. The proliferation and acti-vation of HSC-T6 were observed, and the expression of ASIC1a, α-SMA and collagen Ⅰ were detected by Western blot. Results Compared with the control group, rats from diabetic group induced by STZ, liver fibrosis group induced by CCl4 , and the diabetes com-plication liver fibrosis rats co-induced by STZ and CCl4 were all observed with liver damage at different levels, and tissue injury of complication group was most seri-ous. However, the expression of ASIC1a in the three model groups was significantly increased compared to the control group. ASIC1a level was most obvious in the diabetes complication liver fibrosis rats. Amiloride pretreatment significantly decreased ASIC1 a expression and inhibited PDGF-BB mediated proliferation and the expression ofα-SMA and collagenⅠin HSC-T6 under high glucose environment. Conclusion High ambient glucose aggravates HSC activation and hepatic fibrosis, and this may be related with the increasing expression of ASIC1a.