Objective To investigate the effects of leukotriene in children with respiratory syncytial (RSV)viral bronchiolitis.Methods The blood and sputum levels of Ieukotriene were detected in 33 cases diagnosed RSV bronchiolitis and 12 cases which were diagnosed pneumonia without RSV infection.Thirty-three cases of bronchiolitis were devided into mild-moderate group(n =22)and severe group(n =11)according to the lowell score.Results The blood and sputum levels of leukotriene in mild-moderate group,severe group,and pneumonia group were(76.96 ± 28.19)pg/ml,(103.53 ± 16.85)pg/ml,(18.14.± 7.49)pg/ml;(31.83 ± 19.14)pg/ml,(67.11 ± 15.11)pg/ml,(6.81 ± 2.90)pg/ml in acute period,and(36.04 ±16.38)pg/ml,(52.27 ± 17.03)pg/m l,(18.14 ± 7.49)pg/ml of serum in recovery period.There were significant differences among three groups(F =48.09,P ＜ 0.001 ; F =15.50,P ＜ 0.001 ; F =44.43,P ＜0.001).After treatment,the blood levels of leukotriene were significantly decreased,but were still higher than that of pneumonia group(P ＜ 0.05).Conclusion The blood and sputum levels of leukotriene increase in children with RSV bronchiolitis,which is related with the severity of bronchiolitis.

A cross-sectional survey of 3589 adolescents was conducted in three cities from different typical geographical zones of Guangdong province. The median urinary iodine concentrations (MUI) of adolescents in Nanxiong, Guangzhou and Maoming were 286.6,204.1 and 166.0μ/L, respectively. The MUI of all these adolescents Was 231.7μg/L, which was slightly higher than the current World Health Organization recommendation.

Objective To investigate the characteristics of post-transplantation diabetes mellitus and analyze its risk factors. Methods Extensive survey was carried out to understand the characteristics of post-transplantation diabetes mellitus in patients who received kidney grafting from February 1984 to December 2006. Results Three hundred forty-four post-transplantatian diabetes mellitus patients from 1872 ones after kidney grafting were found from February 1984 to December 2006. The prevalence of new onset post-transplant diabetes mellitus and impaired fasting glucose in kidney allograft recipients were 18. 4% and 12. 7% respectively, being significantly higher than that in general population and other inpatients. The options of immunosuppressants were significantly associated with the prevalence of post-transplantation diabetes mellitus. By multivariate logistic regression analysis, the baseline characteristics of the post transplantation diabetes mellitus patients were significantly associated with increased age(OR: 1. 309, P = 0. 049), elevated level of the triglyceride (OR: 1. 311, P = 0. 005), treatment with taerolimus (FK506) (OR: 1. 522, P = 0. 008), and large dose of intravenous pulsed prednisolane(OR: 1. 239, P = 0. 011), as compared with patients without post-transplantation diabetes mellitus. Besides, the number of patients with at least one acute rejection episode was significantly greater in the post-transplantation diabetic patients. Mycophenolate mofetil (OR: 0. 716, P = 0. 028) and diltiazem (OR: 0. 737, P =0. 015) were associated with lower risk of post-transplantation diabetes mellitus. Conclusions High prevalence of abnormal glucose metabolism in renal allograft recipients during hospitalization was observed. Many risk factors contributed to the development of post transplantation diabetes mellitus.

Objective To report the clinical and pathological characteristics of one patient with glycogen storage disease Ⅳ (Anderson disease). Methods The patient was received detailed clinical examinations, ultrasound, electromyography, head MRI and muscle biopsy. Results The onset of the 22 years old male patient was 7yrs. The main symptoms were intolerance and fatigue in proximal limbs muscular movement, cardiopalmus by chance. Abdominal ultrasound examinations showed cirrhosis, portal hypertension, splenomegaly. Echocardiogram showed left ventricular myohypertrophia, mild mitral and tricuspid valve insufficiency. Electrophysiology study revealed widespread myogenic changes. Cranial MRI, MRA and MRS were normal. Muscle biopsy showed basophilic intracytoplasmic material in a lot of fibers deposits, which was intensively PAS-positive material and partially resistant to diastase digestion. In the electron microscope, the storage material consisted of filamentous and finely granular material. Conclusions There was the first case of glycogen storage disease Ⅳ reported in our country, mainly involved skeletal muscle, liver, spleen and cardiac muscle.

Aiming at building research disciplines,Xijing hospital has initially achieved a strategic transformation into a hospital with research disciplines,with such measures as scientific layout of disciplines,making of advantageous disciplines with overseas benchmarks,encouragement of potential disciplines with advantageous disciplines,promotion of medical innovation with innovative ideas,and upgrading clinical service quality with technical innovation.

Computed tomography (CT) is considered the most sensitive method for the detection of intraocular foreign bodies (IOFBs).The purpose of this study was to evaluate a new method of 3-dimentional (3D) localization of IOFBs that takes advantage of the anatomical structure of the optic nerve and to assess the clinical outcomes using this new method.Twenty-two trauma patients with IOFBs or suspected IOFBs admitted to our hospital were scanned with multislice CT (MSCT) between July and December 2003.All scanning was performed with a 16-row spiral CT in axial plane using a sequential scanning protocol.During the scanning,the eyeball of the patient was kept stable and was not allowed to rotate internally or externally.Section collimation was set at 16 mm × 0.75 mm.Table feed was 12 mm.Reconstruction index was 0.75 mm.After scanning,the reconstructed images were loaded into a workstation to create the multiplanar reconstruction images with the aid of the 3D software.We compared the localization results with the operative findings.Multiplanar reconstruction images showed IOFBs in all 22 patients.IOFBs occurred in the eyeball of 14 patients,in the wall of the eyeball of 5 patients and in the posterior orbits of 3 patients.Different surgical procedures were designed according to the localization by this new method and all IOFBs were successfully removed.All of these foreign bodies were metallic and the localization of IOFB using MSCT was consistent with that found by operative findings.It was suggested that MSCT is a simple and effective imaging modality for the localization of IOFBs.In our study,we localized the IOFBs more quickly and accurately by taking advantage of the fixed position of the intraocular segment of the optic nerve,and determined the necessary surgical parameters.

Objective To compare the clinical characteristics of multiple sclerosis ( MS) and neuromyelitis optica (NMO) for better diagnosis and differential diagnosis of them. Methods The characteristics of 40 MS and 38 NMO cases were retrospectively studied on clinic manifestations, electroneurophysiology,some laboratory indices, imaging characteristics and so on. Results The ratios of male to female were 1: 1. 35 and 1:4. 43 respectively in patients with MS and NMO, so patients with NMO were more likely to be female as compared with MS ( P < 0. 05 ). The mean onset age was ( 35. 5 ±13. 9 ) years in MS patients and (30. 6 ± 15. 6) years in NMO patients, but no significant difference was found (P>0. 05). The cases of visual acuity ≤0.1 in patients NMO was 13, which of MS was merely 1. The cases of visual acuity less than 0. 5 after treatment in NMO patients was 19, which in MS was only 1. The cases of cognitive impairment in NMO was 3, which of MS was 10. The cases of cerebrospinal fluid oligoclonal bands in MS was 16, which in NMO patients was 9. The lesions of spinal cord shown in MRI of MS patients were typically oval, peripheral and asymmetric, but those in NMO patients extended longitudinally and converged centrally. The mean number of involved vertebral segments in NMO patients was significantly greater than that in MS patients ( 6. 6 vs 2. 2, P < 0. 01). Furthermore, the number of spinal cord lesions in MS patients was alse remarkably greater than that in NMO patients (2. 0vs1.2, P <0. 01). Conclusions NMO may be a distinct clinical entity, which is likely to be differentiated from MS by its tendency to affect women, younger age at onset, and other features clinical manifestations, electroneurophysiology, laboratory parameters, neuroimaging show..

OBJECTIVETo elucidate the regulatory mechanism underlying proliferation and anti-apoptosis in NSCLC by overexpression of miR-21.

METHODSReal-time PCR was used to measure miR-21 abundance in non-small cell lung cancer (NSCLC) tumor samples and adjacent normal tissues, as well as NSCLC cell lines. Tumor suppressor genes as potential targets of miR-21 were predicted by sequence analysis. Luciferase assay and Western blot were used to assess the regulatory effect. The effect on A549 cell viability and apoptosis by miR-21-induced gene repression was tested by trypan-blue exclusion and flow cytometry.

RESULTSmiR-21 expression was 2.24-fold higher in the NSCLC tumor samples and 3.06-fold higher in the A549 cells than that in the adjacent normal tissues. Sequence prediction and gene expression regulation assays showed that miR-21 could reversely regulate the expression of PDCD4 (P < 0.01). Suppression of miR-21 expression is associated with an elevation of Pdcd4, resulting in a significant reduction of proliferation and the apoptosis rate (2.6%) was increased to 10.9%. Moreover, the anti-proliferation and pro-apoptotic effect by miR-21 suppression could be reversed by PDCD4 knock down.

CONCLUSIONSuppression of the tumor suppressor PDCD4 expression may be one of the important regulatory pathways of the miR-21-mediated cell proliferation and decrease of apoptosis in non-small cell lung cancer.

Aged ; Apoptosis ; Apoptosis Regulatory Proteins ; genetics ; metabolism ; Carcinoma, Non-Small-Cell Lung ; metabolism ; pathology ; Cell Line, Tumor ; Cell Proliferation ; Gene Expression Regulation, Neoplastic ; Humans ; Lung Neoplasms ; metabolism ; pathology ; Male ; MicroRNAs ; genetics ; metabolism ; Middle Aged ; Oligonucleotides, Antisense ; genetics ; RNA Interference ; RNA-Binding Proteins ; genetics ; metabolism ; Transfection

Objective To explore the effect of ginsenoside Rg1 on leukemia stem cells through comparing the biological senescence characteristics of HSCs in the patients with leukemia and healthy people,and provide new ideas and methods for leukemia prevention and treatment.Methods Fifteen cases of normal bone marrow in normal group and sixteen cases of chronic myeloid leukemia in leukemia group were divided into control group and Rg1 group,respectively.The control group used the conventional culture.The Rg1 group used the culture system with 10 μg/mL ginsenoside Rg1,other conditions were the same as control group.The bone marrow mononuclear cell of all groups were extracted after 2 days,and the CD34 +/CD38-cells population was isolated and purified by immunomagnetic adsorption cell sorting(MACS).The purity of the cells and cell cycles phase were detected by flow cytometry.Cell viability was detected by trypan blue staining.The percentage of positive cells was detected by SA-β-gal staining.CCK-8 detected the CD34 +/CD38-proliferation ability of each group.Results The ratio of CD34 +/CD38-cell population was (1.76 ± 0.34) ％ in every 1 × 106 BMNCs before sorting;the proportion of CD34 +/CD38-cell population per 1 × 106 cells after immunomagnetic sorting was (91.15 ± 2.41)％.The positive rate of SA-β-gal staining in human bone marrow CD34 +/CD38-cells of leukemia Rg1 group was significantly higher than that in leukemia control group,the difference was not significant (P ＞ 0.05);meanwhile there was no significant difference between normal control group and normal Rg1 group,but higher than that in leukemia control group,the difference was significant(P ＜ 0.05).CCK-8 results showed that the proliferation of CD34 +/CD38-cells was significantly increased in leukemia control group than those in the other groups.The survival rate of CD34 +/CD38-cells in human bone marrow was 99.1％ in all groups.Cell cycle phase results showed that the G1 arrest of CD34 +/CD38-cells in leukemia control group was significantly lower than those in the other three groups.Conclusion CD34 +/CD38-cells in chronic myeloid leukemia patients may be caused by some chronic myeloid leukemia.Ginsenoside Rg1 can effectively delay the process of aging.

Special designed group I intron ribozymes can specifically splice objective RNA, repair the mutant gene in RNA level. The specificity of ribozyme is determined by nucleotides specific internal guide sequence (IGS) introduced to the enzyme. In this study, fragment sequence containing Tetrahymena thermophilia intron I of 26S rRNA gene was cloned and cis-splicing activity of this ribozyme was confirmed by in vitro transcription. For evaluating the trans-splicing activity of this ribozyme, a truncated mutant Green Fluorescence Protein (GFP) vector, XYQ5/XYQ10- pEGFP-C2, was constructed. This vector deleted the 3' end 564bp fragment of EGFP coding sequence, led to the lost the activity of emitting green fluorescence. Trans-splicing ribozyme plasmids ptrans-rib-CMV2 for remedy of the truncated mutant EGFP was constructed by PCR and molecular cloning techniques. This vector utilizing cloned 26S rRNA intron 1 as core enzyme; selecting T-G site at 194bp of EGFP coding sequence as splicing receptor, designed an IGS which is inversely complement to the 188-193nt of EGFP mRNA; the 195-890bp fragment of EGFP coding sequence was ligated to the 3'-end of ribozyme core. The fragment containing these components was inserted to a eukayotic expression vector pRC-CMV2. Using linearized XYQ5/XYQ10- pEGFP-C2 and ptrans-rib-CMV2 as templates, truncated EGFP mRNA and the constructed ribozyme vector were transcribed and mixed to evaluate the trans-splicing activity. Analysis of in vitro transcription products mix by RT-PCR verified the existence of wild type EGFP mRNA molecule. Co-transfection of XYQ5/XYQ10- pEGFP-C2 with ptrans-rib-CMV2 to Hela cells proved this ribozyme restored green fluorescence within cell, but the efficiency was low.
Animals ; Base Sequence ; Green Fluorescent Proteins ; genetics ; HeLa Cells ; Humans ; Introns ; genetics ; Molecular Sequence Data ; Mutant Proteins ; genetics ; Mutation ; RNA, Catalytic ; genetics ; RNA, Messenger ; genetics ; Tetrahymena ; enzymology ; Trans-Splicing ; Transcription, Genetic