Objective To evaluate the value of diffusion-weighted imaging(DWI)on differential diagnosis of intracranial cystic lesions.Methods Seventy-six patients with surgically and pathologically confirmed intracranial cystic lesions undergone conventional MRI,DWI and contrast enhanced MRI examination.The signal characteristics of intracrania]cystic lesions on DWI were analysed retrospectively, the apparent diffusion coefficient(ADC)values of cystic areas were measured quantitatively.Results Nineteen brain abscesses showed hyperintense signal on DWI.Among 34 brain tumors,3 brain gliomas were hyperintense signal,1 brain glioma was isointense signal and 1 metastasis was hyperintense signal;the other 29 brain tumors showed hypointense signal on DWI.The ADC values of all lesions were:(0.62?0.15)? 10~(-3)mm~2/s in brain abscesses,(2.39?0.78)?10~(-3)mm~2/s in brain gliomas,(2.68?0.40)? 10~(-3)mm~2/s in brain hemangioblastomas,(2.79?0.79)?10~(-3)mm~2/s in brain metastases,respectively. There were significant differences between the ADC values of brain abscess and the cystic or necrotic portions of brain glioma,hemangioblastoma,metastasis(P0.05). Seven intracranial arachnoid cysts showed hypointense signal and 16 epidermoid cysts strikingly hyperintense signal on DWI.The ADC values of arachnoid cysts and epidermoid cysts were(2.96?0.36)?10~(-3)mm~2/s and(0.94?0.13)?10~(-3)mm~2/s respectively.There was significant difference between the ADC values of arachnoid cysts and epidermoid cysts(P

OBJECTIVETo study the nosocomial fungal infections in the patient with severe hepatitis and analyze of risk factor.

METHODSAll 115 severe hepatitis with fungal infections inpatients was studied prospectively.

RESULTSWe identified 115 cases with fungal infections, the mean age of patients was 37.2+/-21.5 years, male: 49 cases, female 66 cases. Infection of abdominal cavity accounted for 40.9%, infectious rate in respiratory tract and digestive tract were 26.9%, 21.8%, respectively. Candida albicans accounted for 67.6%. Use of broad-spectrum antibiotic and corticosteroids, neutropenia, severity of liver disease, improper medical manipulations as significant risk factors for fungal infection. Death rate of study group and control group was 59.1%, 34.8%, respectively (x2=36.0). In multivariate analysis, neutropenia, disseminated infection and severity of liver diseases were independent prognostic factors.

CONCLUSIONIdentification of risk factors and predictors of a poor outcome in patients with severe hepatitis with fungal infections, it suggested that implications in prophylaxis of fungal infection, early diagnosis and appropriate therapy would be important for these patients.

Adult ; Candidiasis ; diagnosis ; epidemiology ; China ; epidemiology ; Cross Infection ; complications ; epidemiology ; Female ; Hepatitis, Viral, Human ; complications ; Humans ; Male ; Middle Aged ; Multivariate Analysis ; Mycoses ; epidemiology ; microbiology ; Prospective Studies ; Risk Factors ; Severity of Illness Index

Child, Preschool ; Disease Outbreaks ; prevention & control ; Humans ; Mumps ; epidemiology ; prevention & control ; Mumps Vaccine ; Treatment Outcome

The purpose of this study was to evaluate the efficiency of Japan Langerhans Cell Histiocytosis Study Group (JLSG) Protocol in treatment of children suffering from multiple system langerhans cell histiocytosis (MS-LCH). The clinical features, therapeutic response and prognosis of 11 children who were diagnosed and treated by JLSG in our department during October 2004 through October 2011 were analyzed. Among all 11 cases, 8 males and 3 females, the age at diagnosis was from 3 month to 6.5 years old with a median age of 3 years old. There were 10 cases of LCH with multi-system involvement (MS-LCH) and 1 case of single-system involvement (SS-LCH). Among those MS-LCH patients, 5 patients had risk organ involvement, and the other 5 patients did not develop risk organ involvement. All patients had been treated with JLSG protocol. The results showed that 4 cases achieved good response after 6-week induction treatment and the time of drug discontinuation were 5 - 20 months without relapse; 3 cases achieved partial response after 6-week induction treatment, among them 1 case did not relapse after discontinuation of drugs for 19 months, 1 case was still receiving maintenance treatment, 1 case abandoned induction treatment; 4 patients got no response (NR) or progressive disease after 6-week of induction treatment and were switched to salvage therapy, among them, 2 patients had stopped treatment for 2 - 20 months without relapse, 1 patient was still receiving maintenance treatment, one had changed to another therapy. It is concluded that the most of childhood LCH can be effectively controlled by immunochemical therapy based on the JLSG protocol. For children with LCH who has a poor response after 6-week induction treatment, LCH can still be well controlled if switched to salvage treatment.
Antineoplastic Protocols ; Child ; Child, Preschool ; Female ; Histiocytosis, Langerhans-Cell ; drug therapy ; Humans ; Infant ; Male ; Retrospective Studies ; Treatment Outcome

BACKGROUNDAdvanced glycation end products (AGEs) play a critical role in the development of diabetic nephropathy. Reactive oxygen species (ROS) may play a critical role in AGEs induced growth factor expression. In this study, the effects of AGEs on transforming growth factor beta1 (TGF-beta1), connective tissue growth factor (CTGF) and fibronectin (Fn) mRNA expression and oxidative stress in cultured NRK-49F cells were examined.

METHODSNRK-49F cells were incubated with medium containing different doses of AGEs (50, 100 or 200 microg/ml) for 24 hours, or with AGEs 100 microg/ml for different times (0, 12, 24 or 48 hours). Cells in the serum-free medium or medium containing 25 mmol/L glucose were controls. Cells were treated with 25 mmol/L glucose and 100 microg/ml AGEs for 24 hours to determine the effects between AGEs and glucose. We clarified the role of antioxidant by pretreating cells with N-acetylcysteine (10 mmol/L), ginkgo biloba extract (50 or 100 mg/L) for 24 hours and with 100 microg/ml AGEs for further 24 hours. Alamarblue dye assay was used to analyze cell growth; intracellular ROS generation was measured by flow cytometry; intracellular glutathione by fluorescence spectrophotometry; expressions of TGF-beta1, CTGF and Fn mRNA by semiquantitative RT-PCR.

RESULTSAGEs significantly increased the expressions of TGF-beta1, CTGF, Fn mRNA and intracellular ROS generation, and decreased the glutathion level in NRK-49F cells in dose- and time-dependent manners. High glucose and AGEs together significantly increased the expression of TGF-beta1, CTGF and Fn mRNA, compared with AGEs and high glucose separately. Preincubation with N-acetylcysteine or ginkgo biloba extract increased GSH level, suppressed AGEs-induced oxidative stress and TGF-beta1, CTGF and Fn mRNA overexpression.

CONCLUSIONSAGEs can significantly increase expression of TGF-beta1, CTGF, Fn mRNA in NRK-49F cells through enhancement of oxidative stress. The accumulation of AGEs may play a pivotal role in the pathogenesis of tubulointerstitial fibrosis in diabetic nephropathy. Suppression of AGEs induced TGF-beta1, CTGF and Fn mRNA overexpression in renal fibroblasts through inhibition of oxidative stress may be a mechanism underlying effect of ginkgo biloba extract in diabetic nephropathy. In addition, antioxidant therapy may help prevent AGEs accumulation and its induced damage.

Antioxidants ; pharmacology ; Cell Proliferation ; drug effects ; Cells, Cultured ; Connective Tissue Growth Factor ; Diabetic Nephropathies ; etiology ; Fibronectins ; genetics ; Fibrosis ; Glutathione ; analysis ; Glycation End Products, Advanced ; pharmacology ; Humans ; Immediate-Early Proteins ; Intercellular Signaling Peptides and Proteins ; Kidney ; drug effects ; metabolism ; pathology ; Oxidative Stress ; drug effects ; Transforming Growth Factor beta1 ; genetics

UNLABELLEDTo analyse the live pathology characteristics in mild ALT-elevated (1 x ULN less than ALT less than 2 x ULN ) HBeAg-positive and HBeAg-negative chronic hepatitis B (CHB) patients, and to explore the influence of the age and HBV DNA level to liver pathology in different HBeAg status patients.

METHODSAll the patients who met the inclusion criteria form "eleventh five-year plan" National Science and Technology Major Project, the treatment program of integrative traditional and western medicine for CHB were enrolled in this study between October 2009 and March 2011 .B type ultrasound-guided liver biopsy was carried out in all patients and hepatitis B surface antigen (HBsAg) , HBeAg titer as well as HBV DNA level were detected at the same time. Hepatic tissue inflammation and fibrosis degree of patients according to HBeAg-positive and negative, age ( more than or equal to 40 years and less than 40 years), HBV DNA level (more than or equal to 10^5copy/ml and less than l0^5 copy/ml) were compared respectively. Chi-square test was used to compare the constitute percentage between the two samples. Multivariate logistic regression analysis was also performed to evaluate the correlation between different factors.

RESULTSThere were no significant difference in the grade of liver inflammation and the stage of liver fibrosis between 389 HBeAg positive and 126 HBeAg-negative patients (X2=4.326 and X2=3.464, respectively, P values were all more than 0.05). In the group of patients with age less than 40 years, the distribution of different liver inflammation and fibrosis had no significant difference between HBeAg-positive and negative patients (X2=2.543 and X2=5.024, respectively, P values were all more than 0.05). In the group of patient with age more than or equal to 40 years, the percentage of moderate and severe inflammation (G3, G4) HBeAg-positive patients(32.9%) owned is much higher than that of HBeAg-negative patients(16.4%), X2=8.777, P less than 0.05.But the stage of liver fibrosis in HBeAg-positive patients was not significantly different than that of HBeAg-negative ones (X2=0.977, P more than 0.5). In the group of patients with HBV DNA more than or equal to 10^5copy/ml, the percentage of mild inflammation in HBeAg-positive patients (17.5%) was much high than that of HBeAg-negative patients(7.3%), X2=8.851, P less than 0.05. The stage of liver fibrosis between HBeAg-positive and negative patients was no significant difference (X2=8.227, P more than 0.05).In the patients with HBV DNA less than 10^5 copy/ml, The percentage of HBeAg-negative patients(29.6%) with mild inflammation(G1) was much higher than HBeAg-positive patients (6.9%), X2=6.357, P less than 0.05. There was no significant difference in the stage of liver fibrosis between HBeAg-positive and negative patients (X2=4.061, P more than 0.05). The results of multivariate logistic regression analysis showed that age was the independent risk factor for different degree of liver inflammation and fibrosis seriousness.

CONCLUSIONThe status of HBeAg has no association with the grade of liver inflammation and the stage of liver fibrosis in CHB patients with mildly elevated ALT. The percentage of moderate and severe inflammation in the HBeAg-positive patients with age more than or equal to 40 years was significantly elevated. The grade of liver inflammation has significant difference between HBeAg-positive and negative patients with different HBV DNA levels as well.

Adolescent ; Adult ; Alanine Transaminase ; blood ; Female ; Hepatitis B e Antigens ; blood ; Hepatitis B, Chronic ; blood ; pathology ; Humans ; Liver ; pathology ; Male ; Middle Aged ; Young Adult

OBJEVTIVETo construct a eukaryotic expression vector of short-hairpin RNA (shRNA) targeting human Akt gene and assess the effect of Akt gene silencing on the growth of colon cancer Lovo cells.

METHODSTwo shRNAs targeting human Akt gene were cloned into pENTRTM/U6 plasmid to obtain the entry clones, and the positive clones were verified by sequencing. After recombination of the pENTRTM/U6 entry constructs and Plenti6/Block-iT DEST vector, the positive clones were confirmed by sequencing. Lovo cells were transfected by the entry vector and DEST Vector, and RT-PCR and Western blotting were performed to detect the interference of Akt gene expressions.

RESULTSThe pENTRTM/U6 entry clones carrying Akt shRNA and pLenti6/DEST-pENTRTM/U6-Akt shRNA were successfully constructed. Both of the vectors were transfected into Lovo cells and resulted in obvious knockdown of the mRNA and protein expressions of Akt.

CONCLUSIONThe Akt siRNA expression vector constructed can significantly inhibit Akt gene expression in Lovo cells, which facilitates further studies of Akt function and tumor gene therapy.

Cell Line, Tumor ; Colonic Neoplasms ; pathology ; Genetic Vectors ; genetics ; Humans ; Proto-Oncogene Proteins c-akt ; biosynthesis ; genetics ; RNA Interference ; RNA, Small Interfering ; genetics ; Transfection

OBJECTIVETo develop a traction reductor for the reduction of lower limb fractures during the minimally invasive surgery and explore its safety and efficacy.

METHODSFrom February 2007 to March 2009, closed or limited open reduction plus percutaneous plate and screw internal-fixation were conducted in 34 patients with fracture of distal femur and tibia metaphysic, among which there were 3 distal femoral fractures (2 33-B, 1 33-C), 14 proximal tibial fractures (9 41-A, 3 41-B, 2 41-C) and 17 distal tibial fractures (9 43-A, 5 43-B, 3 43-C, 2 Gustilo I a), according to the Association for Osteosynthesis-Orthopaedic Trauma Association (AO-OTA) classification. Besides, closed reduction plus interlocking intramedullary nailing on tibial shaft fracture were applied in 36 patients (7 42-A, 21 42-B, 8 42-C, 2 Gustilo I a). All the 70 patients, with an average age of 37.6 years (range: 17 to 63 years) and average time before surgery of 4.7 d (range: 0.7 to 12.0 d), underwent reduction by self-designed traction reductor for lower limb fracture in the surgery. The reduction duration and C-arm fluoroscopy time were recorded. Recovery of the force line of affected limbs after surgery was determined by whether the line from anterior superior iliac spine to the interdigit between the first and second toe-web passed the patella center. And the distance from bilateral anterior superior iliac spine to medial malleolus tip as well as the difference between lower limbs were recorded to determine the recovery of length after surgery. Meanwhile, the varus-valgus and anteroposterior angulations after reduction were measured by AP and lateral X-ray.

RESULTSThe reduction duration was 12.7 min (range: 7 to 31 min); X-ray fluoroscopy time, 1.3 min (range: 0.4 to 3.0 min); length difference between both lower limbs (6.5 ± 1.1) mm; and axial alignment difference (7.0 ± 1.8) mm. The X-ray result showed that varus-valgus angle was (2.75 ± 0.16)°; and anteroposterior angulation (5.13 ± 0.51)°.

CONCLUSIONThe traction reductor for lower limb fracture could achieve satisfying fracture reduction in the minimally invasive surgery of distal femur, tibia metaphysic and tibial shaft fracture.

Adolescent ; Adult ; Equipment Design ; Female ; Fractures, Bone ; surgery ; Humans ; Leg Injuries ; surgery ; Male ; Middle Aged ; Traction ; instrumentation ; Young Adult

To investigate the non-viral vector mediating human coagulation factor VIII gene expression in mouse 32D cell line, a recombinant plasmid vector, pRC/RSV-hFVIIIBDcDNA, was constructed by cloning B-domain-deleted (Delta760aa-1639aa) human factor VIII cDNA (hFVIIIBDcDNA) into plasmid vector, pRC/RSV. The plasmid RC/RSV-hFVIIIBDcDNA was then transfected by means of SuperFect Transfection Reagent into mouse 32D cell line. After screening with G418, the procoagulant activity (hFVIII:C) and antigen (hFVIII:Ag) of human factor VIII in the culture medium were detected using one-stage method and ELISA, respectively. Furthermore, RT-PCR was performed to observe the transcription of hFVIIIBDcDNA. The results showed that human coagulation factor VIII protein existed in culture medium with hFVIII:C up to 2.01 U/(10(6) cell x 24 hours) and hFVIII:Ag to 450.08 ng/(10(6) cell x 24 hours). RT-PCR displayed mRNA of hFVIIIBDcDNA in 32D cells. It is concluded that the recombinant plasmid RC/RSV-hFVIIIBDcDNA can successfully express human FVIII in mouse 32D cell line, and hFVIII expressed in vitro presents the similar coagulant activity to the native hFVIII existing in normal human plasma.
Animals ; Cell Line ; DNA, Complementary ; genetics ; Enzyme-Linked Immunosorbent Assay ; Factor VIII ; genetics ; metabolism ; Gene Expression Regulation ; Humans ; Mice ; Plasmids ; genetics ; Reverse Transcriptase Polymerase Chain Reaction ; Transfection

Objective To understand the knowledge,risk behaviors and HIV prevalence in men who have sex with men (MSM) in thirteen cities.Methods Target samples were chosen using the snowball-rolling method,with transverse KABP and HIV-antibody testing developed for those MSM in thirteen cities of Yunnan.Results A total of 1237 valid questionnaires and 1129 blood samples were collected.Basic knowledge on HIV and the rate of the response was 93.2％.81.1％ of the respondents had anal sex with male parmers in the last six months,of them 49.7％ could persistently using condoms in each anal sex episode.29.0％ of the respondents had sex with female partners in the last six months.The HIV prevalence among the studied MSM was 8.2％ and the prevalence of syphilis among them was 3.9％.Most risky factors of those MSM infected by HIV would include:not persistently use condom when having sex and co-infection of syphilis.Conclusion Both rates of HIV infection associated risk behaviors and HIV prevalence were high in MSM under study that called for more work on HIV prevention and control MSM in Yunnan.