Child ; Humans ; Masturbation ; Medicine, Chinese Traditional ; Qi ; Syndrome ; Yin-Yang

Objective To investigate clinical significance of positive antineutrophil cytoplasmic antibodies (ANCA) in diagnosis for vasculitis or other diseases. Methods From January 2005 to December 2008, 104 patients with positive ANCA detected by enzyme-linked immunosorbent assay (ELISA) in People's Hospital of Peking University were randomly selected and their clinical features and diagnoses were analyzed retrospectively. Results Among 104 ANCA-positive patients, 22 were diagnosed as vasculitis and 13 as ANCA-associated vasculitis, and 82 (78. 8% )were diagnosed as non-vasculitis including 40 of connective diseases such as systematic lupus erythematosus (SLE) and rheumatoid arthritis (RA) and 42 of non-connective diseases with the most common of ulcerative colitis. According to the results of ANCA tests by ELISA, ANCA-positive patients could be divided into those with proteinase 3 (PR3)-positive and myeloperoxideaso (MPO)-positive. More organs were involved in MPO-positive patients (n =48 ) than that in PR3-positive ones ( n = 49), and more frequent involvement of the kidneys and less frequent involvement of the gastrointestinal tract in MPO-positive than those in PR3-positive ones (P < 0. 01 ). As compared to those with non-vasculitis, more organs (2. 28 organs vs. 3.55 organs in average) were involved in patients with vasculitis (P <0. 01 ) and more frequent involvement of the upper or lower respiratory tracts and the kidneys in vasculitis patients ( P <0. 01 or <0. 05, respectively). Elevated leukocyte count and accelerated erythrocyte sedimentation rate (ESR) were also more common in vasculitis patients than those in non-vasculitis ones (P <0. 01 and P <0. 05, respectively). Positive ANCA combined with number of organs involved, clinical manifestations and other laboratory findings, its positive predictive value (PPV) in diagnosis for vasculitis can be improved. Conclusions Spectrum of disease in patients with positive ANCA was varied. Diagnostic value of positive ANCA in diagnosis for vasculitis can be improved if combined with comprehensive analysis of their clinical features and laboratory examinations.

OBJECTIVE: It's practically significant to study college students' behavior and psychology in using the Internet so as to guide them to take advantage of the Internet properly and to promote the proper use of the Internet. DATA SOURCES: The related articles indexed in the Medline Databank from January 2000 to January 2004 were searched by using computer with the index words "students' psychology, computer communication netware, elements analysis", and the language of the articles was limited to English. Meanwhile, the related articles indexed in the Full-length Chinese Journals Databank, Wanfang Databank and the Journal of Chinese Clinical Rehabilitation from January 2000 to January 2004 were searched through the computer with the index words "students' behavior, internet behavior, analysis of elements ", and the language of the articles was limited to Chinese. The subjects of the study were the Chinese college students aged 18 -24.STUDY SELECTION: The materials were studied first to choose the literature on the analysis of the collage students' Internet psychology and behavior. Inclusion criteria: ① random clinical trials; ② Aged 18-20. Exclusion criteria: ① Obviously not random clinical trials; ② Repeated study, syntheses, and Mata analysis articles. For the articles that we found, we conducted a search for each full-length article.DATA EXTRACTION: A total of 81 articles accorded with the standards were involved.DATA SYNTHESIS: From the comprehensive analysis of involved articles, we found that more college students' use the web just for communication, entertainment, excitement, and spiritual sustenance.CONCLUSION: This paper analyzes the modern college students' behavioral and psychological characteristics in Internet use from the perspectives of self-awareness, mood and emotion motivation, sexual psychology and so on respectively. It also puts forward an educational policy on how to instruct the college students to make use of the Internet properly and overcome the problems of psychology towards the Internet.

Adult ; Coronary Occlusion ; therapy ; Extracorporeal Membrane Oxygenation ; Humans ; Male ; Treatment Outcome

Connexin 43 ; genetics ; Connexins ; genetics ; Heart Defects, Congenital ; genetics ; Homeobox Protein Nkx-2.5 ; Homeodomain Proteins ; genetics ; Humans ; Infant ; Infant, Newborn ; Mutation ; genetics ; Myocardium ; metabolism ; Transcription Factors ; genetics

BACKGROUND: Embryonic stem cell (ESC) is a kind of highly undifferentiated totipotent cell. It can proliferate and maintain its totipotency in the system cultured in vitro. It is one of most promising stem cells in thetreatment of central nerve injury.OBJECTIVE: To observe the survival and migration of induced transplanted ESC in mice with spinal injury and hypoxic-ischemic encephalopathy.DESIGN: A completely randomized grouping design, controlled animal experiment.SETTING: Laboratory of Developmental Biology Research Center of Shanghai Second Medical University.MATERIALS: Sixty C57/BL6J mice, of clean grade and either gender, aged 6 to 8 weeks (n =30) and 7 days (n =30)were provided by the Shanghai Experimental Animal Center, Chinese Academy of Sciences [Permission No, SCXK (hu)2003-0003]. This animal experiment was approved by Animal Ethics Committee. Mouse ESC strain S8, labeled LacZ marker gene (Provided by Shanghai Developmental Biology Research Center). X-gal dyeing reagent (Sigma Company).METHODS: This experiment was carried out in the laboratory of Shanghai Developmental Biology Research Center (Shanghai Key Laboratory) from October 2002 to December 2003. ① Experimental grouping of spinal injury: Sixteen C57/BL6J successful mice models, aged 6-8 weeks, were randomized into 2 groups: experimental group (n =8), in which, following right spinal semi-sectioning, derivated cell suspension for inducing the in vitro differentiation of ESC was injected at 1 cm away from injury through vertebral canal, and control group (n =8), in which, following right spinal semi-sectioning, phosphate buffer solution (PBS) was injected at the peripheral region of injury. ② Hypoxic-ischemic encephalopathy experimental grouping: Sixteen successful C57/BL6J mice models, aged 7 days, were randomized into 2 groups: experimental group (n =8), following ligation of right common carotid artery, mice were placed in the closed container containing 0.08 volume fraction of oxygen and 0.92 volume fraction of Nitrogen gas, and taken out 1.5 hours later; 3 μL ESCs were injected into the right cerebral ventricle at about 1 week, and control group (n =8), in which, the same amount of PBS was injected into the right cerebral ventricle. ③ At 12 weeks after transplantation, the survival and migration of induced ESCs labeled by Lac-Z in the spinal cord and brain were observed by zymologic method.MATN OUTCOME MEASURES: Survival and migration of ESCs in the central nervous system.RESULTS: ①After being induced in vitro and transplanted to spinal injured region, ESCs differentiated into neural precursor cells. Neural precursor cells could survive in the injured region and migrate to 5 mm away from injured region.Immunohistochemistry proved that the neural precursor cells of transplanted ESCs could differentiate into neurons.Morphologically, it was proved that neural precursor cells-derived from ESCs could well integrate peripheral tissue. ② The induced ESCs were injected into the lateral cerebral ventricle of mice. Derived ESCs widely distributed in the injured hippocampal region, cerebral cortex ventricle choroid plexus, vascular endothelium and other regions, and integrated peripheral tissue, which were similar to adjacent cells in morphology, suggesting that induced ESCs also could survive for long time and far migrate.CONCLUSION:The induced ESC can survive and migrate in the host injured brain and spinal cord, and the migration of ESCs is more obvious in the brain than in the spinal cord.

To provide theoretical and practical basis for the successful formulation design of physically-mixed inhalation dry powder of proteins and peptides, related references were collected, analyzed and summarized. In this review drug micronization technology and commonly used carriers for inhalation dry powder preparation were introduced. For proteins and peptides, supercritical fluid technology and spray-drying are more suitable because of their capabilities of keeping drug activity. Being approved by U. S. Food and Drug Administration, lactose has been extensively used as carriers in many inhalation products. Formulation and process factors influencing drug deposition in the lung, including carrier properties, drug-carrier ratio, blending order, mixing methods, mixing time and the interaction between drug and carrier, were elucidated. The size, shape and surface properties of carries all influence the interaction between drug and carrier. Besides, influence of micromeritic properties of the dry powder, such as particle size, shape, density, flowability, charge, dispersibility and hygroscopicity, on drug deposition in the lung was elaborated. Among these particle size plays the most crucial role in particle deposition in the lung. Moreover, based on the mechanisms of powder dispersity, some strategies to improve drug lung deposition were put forward, such as adding carrier fines, adding adhesive-controlling materials and reprocessing micronized drug. In order to design physically-mixed inhalation dry powder for proteins and peptides with high lung deposition, it is essential to study drug-carriers interactions systematically and illustrate the potential influence of formulation, process parameters and micromeritic properties of the powder.
Administration, Inhalation ; Drug Carriers ; chemistry ; Dry Powder Inhalers ; Lactose ; chemistry ; Particle Size ; Peptides ; administration & dosage ; Powders ; administration & dosage ; Surface Properties ; Technology, Pharmaceutical

Adult ; Endocarditis ; complications ; microbiology ; Female ; Humans ; Pulmonary Embolism ; etiology ; Pulmonary Valve ; microbiology

Aim To establish a hepatic carcinoma cell line with stable voltage-gated chloride channel 3 ( ClC-3 ) gene silencing through the lentivirus-mediated short-hairpin RNA ( shRNA ) method and investigate the effects of gene silencing on invasion and migration. Methods Three lentiviral vectors coding shRNA tar-geting ClC-3 gene were constructed, the recombinant plasmids were packaged into mature lentivirus by 293FT cells, and then the lentiviruses were harvested, concentrated and titrated. MHCC97H cells were infec-ted with the recombinant lentiviruses and then were se-lected to obtain cell lines stably expressing ClC-3 shR-NA. The efficiency of ClC-3 mRNA and protein ex-pression interference were determined by real-time flu-orescence quantitative PCR and Western blot, respec-tively. The effects of ClC-3 gene interference on inva-sion and migration of MHCC97 H cells were performed by Transwell chamber assays with or without Matrigel and cell scratch assay. Results The recombinant lentiviral vectors were successfully constructed and four lentiviruses were acquired after packaged by 293 FT cells. One negative control cell line and three cell lines with ClC-3 gene interference ( MHCC97 H/shClC-3-1 , shClC-3-2 and shClC-3-3 ) were successfully construc-ted after MHCC97 H cells were infected with lentivirus-es. The expression level of ClC-3 mRNA and protein in three ClC-3-silenced cells were obviously lower than the negative control cells ( P <0. 01 ) , MHCC97 H/shClC-3-2 cells showed the greatest inhibition of ClC-3 mRNA and protein expressions. As compared with the negative control cells, the ClC-3 gene interference sig-nificantly decreased invasion and migration of MH-CC97 H cells in vitro ( P <0. 01 ) . Conclusion The hepatic carcinoma cell lines with stable ClC-3 gene si-lencing were successfully established and the ClC-3 gene interference could significantly inhibit invasion and migration of MHCC97H cells.

Objective To assess the value of multi-slice spiral CT angiography (MSCTA) in diagnosis of posterior nutcracker syndrome (NCS). Methods MSCTA of 15 patients clinically diagnosed as posterior NCS (patient group) and 50 subjects with normal renal vessels (control group) were retrospectively analyzed. The anatomy, course and relationship to the adjacent structure of left renal vein (LRV) and its branches were observed. The anteroposterior diameter (d1) and cross areas (s1) of the angle of control group and posterior abdominal artery (AA), the anteroposterior diameter (d2) and cross areas (s2) at the largest lumen near the renal hilar were measured and the ratio of s2/s1 and d2/ d1 were calculated.Results All LRVs posterior AA of patient group were compressed and narrowing with dilating apparently near the renal hilar. The difference of d2 was not significant (P＞0.05), but of other values were significant (P＜0.05).Conclusion MSCTA can show anatomy and three-dimentional trend clearly of LRV for posterior NCS, and evaluate the extent of narrow and dilating lumen accurately with cross areas measuring.