As the major pathway mediating specific protein degradation in eukaryotes, ubiquitin-proteasome system (UPS) is involved in various physiological and pathological processes such as cell cycle regulation, immune response, signal transduction and DNA-repair. Deubiquitinases (DUB) maintain the balance of UPS and related physiological processes via reversibly removing ubiquitin from the covalently modified protein substrates, which have been implicated in various disease processes in case of their imbalance expression. Because DUB plays critical regulating roles in the UPS pathway, they may be also the ideal drug targets for severe and intractable human diseases, such as cancer and neurodegenerative disease. With the rapid development of proteomic technology, systematical investigation of specific substrates and interacting proteins of varied DUB via mass spectrometry approach may shed light on these DUB's biological function and regulating roles in the physiological and pathogenic states. In this review, we briefly introduce the characteristics of DUB and summarize the recent application and progresses of proteomics in DUB research.
Humans ; Mass Spectrometry ; Proteasome Endopeptidase Complex ; metabolism ; Proteomics ; Signal Transduction ; Ubiquitin ; metabolism ; Ubiquitin-Specific Proteases ; metabolism

Protein ubiquitination is one of the most important and widely exist protein post-translational modifications in eukaryotic cells, which takes the ubiquitin and ubiquitin chains as signal molecules to covalently modify other protein substrates. It plays an important roles in the control of almost all of the life processes, including gene transcription and translation, signal transduction and cell-cycle progression, besides classical 26S protesome degradation pathway. Varied modification sites in the same substrates as well as different types of ubiquitin linkages in the same modification sites contain different structural information, which conduct different signal or even determine the fate of the protein substrates in the cell. Any abnormalities in ubiquitin chain formation or its modification process may cause severe problem in maintaining the balance of intracellular environment and finally result in serious health problem of human being. In this review, we discussed the discovery, genetic characteristics and the crystal structure of the ubiquitin. We also emphasized the recent progresses of the assembly processes, structure and their biological function of ubiquitin chains. The relationship between the disregulation and related human diseases has also been discussed. These progress will shed light on the complexity of proteome, which may also provide tools in the new drug research and development processes.
Humans ; Proteome ; Ubiquitin ; chemistry ; Ubiquitination

Objective To observe the iodine state of patients with autoimmunity thyroid disease(AITD) in Shaanxi province,and to discuss the relationship between the metabolism of iodine and the occurrance,development and prognosis of AITD.Methods A total of 388 cases were collected,among whom 283 were patients with AITD,and 105 were patients with non-AITD.Questionnaires were designed to determine the general state of the patients,the size,shape and texture of the thyroid,the urinary concentration of iodine,the function of thyroid and the autoantibody of thyroid.The data were processed by SPSS12.0.Results The mean urinary concentrations of iodine in patients with GD,with HT,and the control group were 212?g/L,245.4?g/L,and 197.8?g/L respectively,which were statistically different.In the HT group,wich different urinary concentrations of iodine,there were no statistical difference of TGAb,TMAb,and HS-TSH.Conclusion Excessive in-take of dietary iodine may be related with AITD.

Fluorescent staining method is a sensitive cytochemical staining method, it can reflect minimal changes of biochemical components of cells. The 7690-Xu fluorescent staining solution prepared with thioflavine can show the heterogeneo- us fluorescence of cells in different stages of differentiation. The younger cells with low degree of differentiation show blue fluorescence, the lower the degree the deeper the color. Along with the differentiation of cells, the blue color of fluorescence deflects to the red color of spectrum gradually, the blue color of fluorescence of cytoplasm changes gradually to bluish, bluish-green, and finally yellow color. The blue color of fluorescence of nucleus changes through greyish- blue to orangeyellow or orange-red.The cytoplasm of cells in various organs with high degree of differentiation appears yellow, and the nucleus orange-yellow or orange-red in color.

group Nor(P0.05).Conclusions The changes of ambulatory pulse pressure can reflect the degree of EH.The obvious increase of PP and decrease of DBP maybe are the exclusive features of ABPM in EH patients with target organs damage.

Scientific research is the essence of the comprehensive competitiveness in promoting medical development and progress.The county-level public hospitals are to improve all the medical staffs' scientific research awareness and level and the development and progress of clinical medical science by establishing an incentive mechanism and a platform for scientific research and combining the specialties of the hospitals to carry out relative scientific research.

Antineoplastic Combined Chemotherapy Protocols ; therapeutic use ; Cyclophosphamide ; therapeutic use ; Doxorubicin ; therapeutic use ; Female ; Follow-Up Studies ; Genes, Immunoglobulin Heavy Chain ; Genes, bcl-2 ; Genes, myc ; Humans ; Lymphoma, B-Cell ; drug therapy ; genetics ; pathology ; Male ; Methotrexate ; therapeutic use ; Prednisone ; therapeutic use ; Translocation, Genetic ; Vincristine ; therapeutic use

Adolescent ; Adult ; Cord Blood Stem Cell Transplantation ; adverse effects ; Female ; Graft vs Host Disease ; etiology ; Granulocyte Colony-Stimulating Factor ; pharmacology ; Haploidy ; Histocompatibility Testing ; Humans ; Killer Cells, Natural ; immunology ; Male ; Reoperation

Objective To investigate the radiographic classification and presentation of atypical spinal tuberculosis in adults.Methods Data of 45 consecutive patients who had suffered from atypical spinal tuberculosis confirmed by surgical interventions and pathologic examinations at our department from February 2000 to August 2012 were retrospectively analyzed.There were 29 males and 16 females,aged from 20 to 71 years (mean,46.2 years).Twenty-five patients presented with low-grade fever,lassitude and loss of weight,and the other 20 patients denied the constitutional symptoms of tuberculosis.An increased erythrocyte sedimentation rate (range,25-107 mm/1 h) was found in 37 patients.All patients were investigated by the following imaging resources:plain X-rays,CT scan and MRI.3D reconstruction CT was performed in 12 patients and PET-CT was performed in 2 patients.All patients were treated surgically and confirmed by pathologic examinations and 3 patients had undergone CT-guided biopsy.Results Atypical spinal tuberculosis presented in different radiographic presentation forms.Nine patients had involvement of a single vertebral body,which was depicted with nonuniformly increased signal intensity on T2-weighted MR images.CT scan showed irregular bony destruction in old patients and solitary osteolytic lesion with well-defined margins in young adults.There were 2 cases of isolated affection in the posterior elements (vertebral appendages type),and the involved vertebral appendages demonstrated hyperintense signal on T2-weighted MR images and bony destruction on CT scan.There were 8 cases of simultaneous affection in the anterior and posterior element of one vertebra (circumferential vertebral involvement type),and CT scan showed multiple bony destruction in vertebral body and neural arch.There were 5 cases of affection in disc (intervertebral disc involvement type),which presented decreased signal in MRI and protruding disc pressing the dural sac could be found.There were 14 cases of multiple vertebral tuberculosis in continuity (contiguous spinal tuberculosis),which presented multiple tuberculosis lesions on 3D-CT.There were 7 cases of multiple vertebral tuberculosis in noncontinuity (noncontiguous spinal tuberculosis),which presented destructive tubercular lesions affected different levels in different regions of the spine on MRI.Conclusion Atypical spinal tuberculosis had multiply radiographic presentation forms and atypical radiographic features.Worm-eaten destruction of bone or vertebral endplate,marrow edema and increased signal intensity of paraspinal ligament are features of radiographic presentation in diagnosis of atypical spinal tuberculosis.

Objective To measure the effect of one-stage transplantation of reverse-flow vascular pedicle fibular grafts in treatment of infected nonunion of the distal tibia.Methods From January 2001 to December 2012,23 patients sustaining the infected nonunion of the distal tibia were transplanted with reverse-flow vascular pedicled fibular grafts in one-stage.There were 13 males and 10 females,aged 26 to 59 years (mean,38.7 years).Tibial nounion based on the Jain-Sinha classification was rated as Type A in 6 patients and Type B in 17 patients.After the operation,the patients received 2-3 weeks of intravenous antibiotic treatment and then 4-week oral antibiotic therapy.Wound healing,limb and ankle joint fucntion and outcomes in fibular transplantation were observed.Results Duration of follow-up was 16-46 months (mean,28.6 months).There were no exudates and ulcerations of the skins.Smooth healing was achieved in all the patients except that fibular fracture was noted in one patient healed after cast immobilization.Healing time ranged from 12 to 28 weeks (mean,15.6 weeks).Limb function evaluated with Ennecking system had (87 ± 11) ％ restoration.According the Olerud-Molander scoring system,ankle function was excellent in 16 patients and good in 7 patients,with the excellent-good rate of 100％.Conclusion One-stage reverse-flow vascular pedicle fibular grafting is an optional procedure for treatment of infected nonunion of the distal tibia,due to the technique is easy and effective.