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Journal of Experimental Hematology ; (6): 1949-1954, 2019.
Article in Chinese | WPRIM | ID: wpr-781513


OBJECTIVE@#To investigate the changes of mean platelet volume (MPV), platelet distribution width (PDW) and platelet associated antibodies (PAIg) in children with acute immune thrombocytopenic purpura (aITP), and to explore the diagnostic value of MPV, PDW, PAIg and their combination for megakaryocyte dysmaturity in aITP children.@*METHODS@#Plt count, MPV and PDW of 36 aITP children were measured by using Sysmex XN automatic blood cell analyzer, and 33 children with acquired thrombocytopenic purpura (ATP) without megakaryocyte dysmaturity. The expression of PAIg was detected by flow cytometry, and the number and classification of megakaryocytes in the bone marrow were performed by marrow cytology. The diagnostic significances of MPV, PDW, PAIg and their combination as well as the sensitivity and specificity for megakaryocytes dysmaturity in aITP were assessed through calculating the area under ROC curve (AUC), after determining the influence of each parameters on the megakaryocyte dysmaturity by Logistic regression.@*RESULTS@#MPV, PDW and PAIg of aITP children were significantly higher than those of the ATP children (P<0.05), while the Plt count and number of thromocytogenic megakaryocytes per area (1.5 cm×3 cm) were less than those of the controls (P<0.05). Count of RBC and WBC, percentages of neutrophil granulocytes and lymphocydes in aITP were similar to those in the controls(P>0.05). The results of Logistic regression showed that Plt count, MPV, PDW and PAIg were the factors influencing megakaryocyte dysmaturity in aITP children, and the regression model has a high statistical significance (χ=65.491,P=0.001) and r square (R=0.713). The AUC of the combined detection of Plt count, MPV, PDW and PAIg was 0.863, which was much higher than that of Plt count, MPV, PDW, PAIg individually or in pairs. The sensitivity and specificity of the combined detection were 79.167% and 89.697%, which were higher than those of Plt count, MPV, PDW, PAIg individually or in pairs.@*CONCLUSION@#The diagnostic significance of MPV and PDW for megakaryocyte dysmaturity in aITP are insufficient, but the diagnostic efficacy can be improved by combined examination with PAIg.

Antibodies , Blood Platelets , Child , Humans , Mean Platelet Volume , Megakaryocytes , Platelet Count , Purpura, Thrombocytopenic, Idiopathic , Diagnosis
Gut and Liver ; : 324-328, 2014.
Article in English | WPRIM | ID: wpr-163233


To evaluate the effects of glutamine-supplemented parenteral nutrition (PN) and probiotics in adult autoimmune enteropathy (AIE) patients. Four adult AIE patients were identified from April 2006 to January 2012. Clinical and nutritional data were obtained from the patients' medical records. Glutamine-supplemented PN started immediately when the AIE diagnosis was confirmed. The total PN duration was 351 days. According to the PN prescription, the average caloric intake ranged from 20 to 25 kcal/kg/day, and the protein intake ranged from 1.2 to 1.5 g/kg/day. Alanyl-glutamine (20 g/day) was administered to AIE patients for 4 weeks followed by a 2-week break, and this treatment schedule was repeated when PN lasted for more than 6 weeks. Body weight gain and an increased serum albumin level were achieved after PN, and defecation frequency and quality also improved. Each patient received oral supplements, 250 mL of Ensure and two probiotics capsules (each capsule containing 0.5x10(8) colonies) three times a day when enteral nutrition started. Three AIE patients were successfully weaned off PN, and one patient died of pneumonia. Glutamine-supplemented PN and probiotics show promise in managing patients with AIE and related malnutrition.

Adult , Bifidobacterium , Enterococcus faecalis , Female , Glutamine/administration & dosage , Humans , Lactobacillus acidophilus , Length of Stay , Male , Malnutrition/therapy , Parenteral Nutrition/methods , Polyendocrinopathies, Autoimmune/therapy , Probiotics/administration & dosage , Young Adult
Article in Chinese | WPRIM | ID: wpr-635339


Background The in vitro culture of retinal vascular endothelial cells is the foundation of experimental study of retinal vascular disease. Shortage of human donor eyeballs is a main limiting for the laboratory work. The culture method of rat-derived vascular endothelial cells has been established. However, this method is not enough effective because of severer cellullar injury. Objective Present study was to establish a simple and high effective method for the culture of vascular endothelial cells in vitro. Methods The retinas from 5 SPF SD rats was digested by 0. 1% collagenase and cultured with explant culture method. 20% fetal bovine serum, vascular endothelial growth factor ( VEGF) , insulin-transferrin-selenium( ITS) were composed into the endothelial cell culture medium, and enough blowing was performed to get the cells and fragments from retinal tissue. The cellular suspension was prepared and cultured consequently on human fibronectin-coated culture flasks. Cultured vascular endothelial cells were identified by anti-von Willebrand staining factor. Results The cells emerged from the tissue mass,and cells and some tissue fragments attached to the wall after 24 hours of seeding. The cells grew to show the fusiform in 4 days and merged together in 5 to 6 days,and a cell monolayer was seen in the 14th day after culture. The endothelial cells showed the positive response for von Willebrand factor. After passage, the merging-growth statue of the cells was regained in 2 hours after culture. Conclusion Use of retinal pieces and collagenase-digestion can get the vascular endothelial cells with better activity in vitro. The culture method based on highly selective endothelial cell culture medium associated to FN adhesion-promoting is helpful for gaining the purified of endothelial cells.

International Eye Science ; (12): 209-211, 2010.
Article in Chinese | WPRIM | ID: wpr-641452


AIM: To observe the effect of endothelin-1(ET-1) on the cytoskeleton protein F-actin of cultured human trabecular meshwork (HTM) cells. METHODS: Cultured HTM cells were randomly divided into four groups: control group(0mol/L), low-dose ET-1(10-9mol/L) treatment group, middle-dose ET-1(10-8 mol/L) treatment group, and high-dose ET-1(10-7 mol/L) treatment group. After treated with ET-1, the expression of cytoskeleton protein F-actin in trabecular meshwork was analyzed with Western-blot and the distribution of F-actin was detected with FITC-Phalloidin probe. RESULTS: ET-1 dose-dependently and significantly increased F-actin in trabecular meshwork cells. The F-actin stress fiber and periphery actin fiber highly increased and manifested mild reorganization after treated with ET-1; and there were much more cell-to-cell and cell-to-extracellular matrix attachments formation in ET-1 treated HTM cells than that in the untreated HTM cells. CONCLUSION: ET-1 promoted the expression of cytoskeleton protein F-actin and induced the trabecular meshwork actin cytoskeleton reorganization.

International Eye Science ; (12): 1650-1653, 2010.
Article in Chinese | WPRIM | ID: wpr-641411


AIM: To investigate the influence of He-Ne laser on connective tissue growth factor (CTGF) expression and collagen formation of fibroblast in filtration site after trabeculectomy in rabbit, and to discuss the mechanism for preventing scar formation with He-Ne laserin vivo.METHODS: The upper nasal limbus area next to the upper rectus muscle in right eyes Received 10 minutes He-Ne laser irradiation (200mW/cm2) every day for three days, the left eyes served as control. Twenty-four hours after the last irradiation, both eyes of the rabbits were took trabeculectomy surgery. The expressions of CTGF in the filtration area were tested on the 7th, 14th and 28th day after surgery and collagen density was tested on the 14th and 28th day after surgery. Each of the time point had 7 rabbits. RESULTS: The expression of CTGF was lower than that of the control group's on the 7th and 14th day after trabeculectomy surgery (P=0.01, P=0.005). When examined on the 14th and 28th day, the collagen density of irradiation group were significantly lower than that of the control group's (P=0.013, P=0.01).CONCLUSION: Pretreating the filtration area with 200mW/cm2 He-Ne laser may be helpful in preventing scar formation after trabeculectomy in rabbit, possibly due to downregulation of the expression of CTGF and collagen synthesis in fibroblasts. He-Ne laser may be developed into a new scar preventing method in filtration surgery.

Chinese Journal of Epidemiology ; (12): 1297-1301, 2009.
Article in Chinese | WPRIM | ID: wpr-321065


<p><b>OBJECTIVE</b>To compare the prevalence rates of metabolic syndrome (MS) in obese children, according to three commonly used 'Pediatric MS definitions': (1) the International Diabetes Federation (IDF), (2) Cook, et al, and(3)da Silva, et al, in order to choose an appropriate one for the Chinese obese children. It was also intended to assess the variances of American or Chinese cutoff values on MS prevalence.</p><p><b>METHODS</b>A retrospective study was performed in obese children from Obesity Outpatient Service Program from January 2004 to December 2008. Subjects were eligible if they met the following criteria: (1) aged 7 to 18 years, (2) with no following conditions as hereditary endocrine or metabolic diseases, secondary obesity, hepatic or renal disease, using medication that alters blood pressure or glucose or lipid metabolism etc., (3) data were complete on the variables of interest. Height, weight and waist circumference, systolic and diastolic blood pressure, fasting lipid profiles, blood sugar and insulin were measured. Insulin resistance was evaluated by homeostasis model assessment (HOMA). American or Chinese cutoff values were used to identify central obesity and hypertension. The prevalence rates of MS under three definitions were calculated and compared by Kappa test to determine the degree of agreement.</p><p><b>RESULTS</b>136 patients with 103 males and 33 females were enrolled in the study. According to the American cutoff value, 19.2%, 34.6%, 52.9% of the subjects were classified as MS under definitions of IDF, Cook, et al, da Silva, et al respectively, matching well with 19.2%, 43.4%, 58.1% when the Chinese cutoff value was used (Kappa = 1, 0.79, 0.90). The degrees of agreement according to the Kappa statistics between Cook, et al and da Silva, et al (0.52, American cutoff value/0.51, Chinese cutoff value) were better than the others (0.24 - 0.4). Children who were diagnosed as MS under the definitions of Cook, et al. or da Silva, et al. appeared to have had serious insulin resistance when compared to those without MS.</p><p><b>CONCLUSION</b>Prevalence of the metabolic syndrome appeared to be high among the obese pediatric outpatients, which was probably due to the definition being chosen. The use of definitions provided by Cook, et al and da Silva, et al might be more suitable for MS diagnosis in obese children in the outpatient department, if insulin resistance was under consideration. Both American and Chinese cutoff value could be used for MS diagnosis in the Chinese obese children.</p>

Adolescent , Child , Female , Humans , Insulin , Metabolism , Insulin Resistance , Male , Metabolic Syndrome , Epidemiology , Metabolism , Obesity , Epidemiology , Metabolism , Prevalence , Retrospective Studies , Risk Factors