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Platinum-based chemotherapy resistance is a key factor of poor prognosis and recurrence in hepatocellular carcinoma (HCC). Herein, RNAseq analysis revealed that elevated tubulin folding cofactor E (TBCE) expression is associated with platinum-based chemotherapy resistance. High expression of TBCE contributes to worse prognoses and earlier recurrence among liver cancer patients. Mechanistically, TBCE silencing significantly affects cytoskeleton rearrangement, which in turn increases cisplatin-induced cycle arrest and apoptosis. To develop these findings into potential therapeutic drugs, endosomal pH-responsive nanoparticles (NPs) were developed to simultaneously encapsulate TBCE siRNA and cisplatin (DDP) to reverse this phenomena. NPs (siTBCE + DDP) concurrently silenced TBCE expression, increased cell sensitivity to platinum treatment, and subsequently resulted in superior anti-tumor effects both in vitro and in vivo in orthotopic and patient-derived xenograft (PDX) models. Taken together, NP-mediated delivery and the co-treatment of siTBCE + DDP proved to be effective in reversing chemotherapy resistance of DDP in multiple tumor models.
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Objective:To investigate the effects and its mechanism of chronic unpredictable stress on intestine and liver injuries in rats, and explore the possibility of the existence of brain-gut-liver axis.Methods:Twenty male SD rats were randomly divided into control group and stress group (with 10 in each group). The rats in the stress group were stimulated by chronic unpredictable stress for 4 weeks to prepare the chronic stress model. The rats in the control group were fed normally without stress stimulation. After modeling, ten rats in the control group and seven rats in the stress group were included. The depressive behavior of the two groups was evaluated by sugar water preference experiment. Then the rats were sacrificed. The diversity of gut flora in intestinal feces was analyzed by 16S rRNA sequencing analysis. The pathological injuries of ileum and liver were detected by HE staining. The expressions of occludin in ileum and Toll-like receptor 4 (TLR4) in liver were detected by immunohistochemistry. The expression of TLR4 protein in liver tissue was detected by Western blot. The level of lipopolysaccharide (LPS) in rat portal vein serum was detected by AZO chromogenic limulus test and blood biochemical method was used to detect liver function.Statistical analysis was performed using SPSS 25.0 software, and t-test or Mann-Whitney U test was used for comparison between the two groups. Using STAMP software, Wilcoxon rank sum test was used to analyze the difference in bacterial abundance between the two groups. Results:The consumption of sugar water ((7.86±0.90)ml) and the preference rate of sugar water ((43.06±5.65)%) in the stress group were lower than those in the control group ((15.10±1.51)ml, (76.81±6.44)%), and the difference were statistically significant ( t=11.33, 11.16, both P<0.01). Chronic stress caused pathological damage to rat ileum tissue. Compared with the control group, the ileum villi of rats in the chronic stress group were longer ((448.93±12.71)μm, (497.12±16.72)μm, t=-5.88, P<0.01) and thicker ((81.99±16.54)μm, (133.93±6.78)μm, t=-7.12, P<0.01), and the expression of occludin was significantly down-regulated ((0.236±0.011), (0.130±0.026), t=9.12 , P<0.01), the LPS level increased significantly ((18.83±2.62)EU/L, (38.64±2.51)EU/L, t=-5.79, P<0.01). The Beta diversity of rat intestinal flora changed under chronic stress, and the abundance of WPS-2 phylum in intestinal tract of rats in stress group was higher than that in control group ( t=2.76, P<0.05). Chronic stress caused pathological damage to the liver tissue of rats. Compared with the control group, the expression of TLR4 protein in the liver tissue of the chronic stress group increased ((0.169±0.014), (0.475±0.034), Z=-2.37, P<0.05). Compared with the control group, the ALT ((39.7±6.2)U/L, (82.9±43.1)U/L, Z=-2.35, P<0.05) and AST((130.9±28.9)U/L, (472.7±263.3)U/L, Z=-2.64, P<0.05) levels of the chronic stress group increased, especially in AST. Conclusion:Chronic stress cause synchronous damage to the intestine and liver in rats. The mechanism may be related to the results caused by chronic stress such as the changes of the diversity of intestinal flora, the increasing of intestinal permeability, the action of LPS translocated through portal vein blood on TLR4 in liver.
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Objective:To summarize the perioperative nursing points of percutaneous kyphoplasty (PKP) in elderly patients with osteoporotic vertebral compression fractures assisted by robots, so as to provide reference for orthopedic nursing.Methods:From July 2019 to February 2021, the data of 72 patients undergoing robot-assisted PKP in the spinal surgery of the First Affiliated Hospital of Anhui Medical University were retrospectively analyzed. The perioperative nursing points were summarized, and the nursing experience was summarized. The nursing under the new measures of precise minimally invasive treatment was analyzed and discussed. The length of hospital stay, postoperative ambulation time, complications and satisfaction survey results of patients were collected and recorded. The Numerical Rating Scale(NRS) score, Self-rating Anxiety Scale(SAS) score and Oswestry Disability Index (ODI) score before and after surgery were compared. The correlation analysis of the scores of various factors was combined to comprehensively evaluate the surgical and nursing effects.Results:All patients had no complications related to machine use during and after operation, and their symptoms were improved to varying degrees. Fifty-seven cases of indwelling catheter, catheter time (19.00±14.24) h. The preoperative hospitalization time was (6.16±2.22) d, and the postoperative hospitalization time was (1.94±0.99) d. Postoperative bed time was (16.34±6.81) h. Postoperative nursing satisfaction was (98.55±2.44)%.The postoperative NRS and SAS scores were (1.00±0.55) and (32.06±5.33) points, respectively, which were lower than those before operation (3.51 ± 0.71) and (39.08±8.86) points, and the differences were statistically significant ( t values were 33.976, 8.184, P<0.01). There were statistically significant differences in six indicators of ODI scores before and after surgery, including low back pain, walking, standing, sitting, sleep and self-care ( P<0.01). Correlation analysis showed that there was a strong correlation between the six ODI score factors and the NRS score. The four factors of sitting, walking, low back pain and standing were highly correlated with SAS. Conclusions:The implementation of good perioperative nursing management for patients with PKP assisted by robot can effectively promote the rehabilitation of patients, reduce the incidence of complications and improve patient satisfaction.
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Five patients with mediastinal bronchogenic cyst (MBC) were treated with endoscopic submucosal tunnel dissection (ESTD) between January 2018 and October 2019 at the Department of Gastroenterology in Henan Provincial People′s Hospital. Lesions were located in the middle or lower esophageal level, with diameters≤3.5 cm. The tunnel establishment time was 13-18 min, and the tumor stripping time was 30-51 min. The number of titanium clips used for tunnel closure was 5-8. The tumors were completely resected. No major bleeding or hypoxemia occurred during the operation and no serious adverse reactions occurred after the operation. Postoperative pain scores were all ≤3. The hospital stay was 4-7 days. There was no tumor residue and recurrence during 4-23 months of follow-up.It is suggested that ESTD for MBC which derived from post mediastinum and located at the lower or middle level esophagus is safe and effective.
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Objective@#To investigate the development of hepatocyte senescence during liver fibrogenesis and to explore the effect and possible mechanism of insulin-like growth factor 1 (IGF-1) on hepatocyte senescence and liver fibrosis.@*Methods@#A total of 42 male Sprague Dawley (SD) rats were selected. Eighteen rats were induced by carbon tetrachloride (CCl4) to establish the rat model of liver fibrosis. On the day 0, six and 28 after the establishment of the model, six rats were executed respectively to analyze the liver fibrosis and hepatocyte senescence in CCl4-induced liver fibrosis rat models. Twenty-four rats were divided into control group, CCl4 group, CCl4+ lentivirus vector (LV-CTR) group and CCl4+ LV-IGF-1 group, with six rats in each group.The rats were sacrificed on the 28th day after the establishment of the model. The liver tissues were obtained and the inferior vena cava blood was collected to analyze the effect of IGF-1 overexpression on liver fibrosis and hepatocyte senescence. Analysis variance (ANOVA), least significant difference (LSD) and Dunnett T3 test were performed for statistical analysis.@*Results@#Steatohepatitis on the 6th day and early stage of hepatic fibrosis on the 28th day, which indicated the model was successfully established. The results of the effects of IGF-1 overexpression on hepatic fibrosis and hepatocyte senescence showed that on the 28th day, compared with those of control group, both the score of Ishak liver inflammation and necrosis and the score of Ishak liver fibrosis were increased in the CCl4 group, CCl4+ LV-CTR group and CCl4+ LV-IGF-1 group (0, 14.55±1.94, 15.43±2.19 and 10.29±1.47, respectively; 0, 3.51±0.51, 3.21±0.79 and 1.32±0.40, respectively). The area of liver tissues by Masson staining (0.45±0.40, 5.62±1.08, 6.03±0.65 and 2.88±1.54), SA-β-Gal staining (1.75±0.80, 4.28±1.19, 4.92±1.14, 3.11±0.79), p53 (2.02±0.81, 4.36±1.02, 4.72±0.72 and 3.58±0.70) and progerin (0.72±0.40, 4.52±1.01, 4.01±1.25 and 2.66±0.80) all were increased. The levels of serum IGF-1 all were decreased ((632.00±6.04), (503.00±40.42), (508.00±21.94) and (572.40±5.94) ng/L). However the levels of ALT all were increased ((11.20±5.97), (214.00±73.90), (245.00±76.06) and (30.00±5.00) U/L). The relative expression levels of p53 (0.58±0.06, 1.78±0.18, 1.72±0.10 and 1.23±0.22) and progerin (0.12±0.02, 0.78±0.15, 1.32±0.20 and 0.81±0.16) in the primary hepatocytes were increased. The differences were all statistically significant (F=91.674, 90.778, 32.982, 9.726, 10.640, 17.029, 103.910, 30.059, 64.707 and 97.457, all P<0.05). Compared with those of CCl4+ LV-CTR group, the score of Ishak liver inflammation and necrosis and the score of Ishak liver fibrosis were decreased in the rats′ liver tissues of CCl4+ LV-IGF-1 group, the areas of Masson staining, SA-β-Gal staining, p53 and progerin in the liver tissues were decreased, the level of serum IGF-1 was increased, the level of ALT was decreased, and the relative expression levels of p53 and progerin in primary hepatocytes both were decreased. The differences were all statistically significant (all P<0.05, respectively).@*Conclusions@#Hepatocyte senescence increases in the process of liver fibrosis induced by CCl4. Overexpression of IGF-1 may alleviate liver injury, improve hepatocyte senescence and liver fibrogenesis by regulating the nuclear p53/progerin pathway.
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Objective To investigate the development of hepatocyte senescence during liver fibrogenesis and to explore the effect and possible mechanism of insulin-like growth factor 1 (IGF-1) on hepatocyte senescence and liver fibrosis.Methods A total of 42 male Sprague Dawley (SD) rats were selected.Eighteen rats were induced by carbon tetrachloride (CCl4) to establish the rat model of liver fibrosis.On the day 0,six and 28 after the establishment of the model,six rats were executed respectively to analyze the liver fibrosis and hepatocyte senescence in CCl4-induced liver fibrosis rat models.Twenty-four rats were divided into control group,CCl4 group,CCl4 + lentivirus vector (LV-CTR) group and CCl4 + LV-IGF-1 group,with six rats in each group.The rats were sacrificed on the 28th day after the establishment of the model.The liver tissues were obtained and the inferior vena cava blood was collected to analyze the effect of IGF-1 overexpression on liver fibrosis and hepatocyte senescence.Analysis variance (ANOVA),least significant difference (LSD) and Dunnett T3 test were performed for statistical analysis.Results Steatohepatitis on the 6th day and early stage of hepatic fibrosis on the 28th day,which indicated the model was successfully established.The results of the effects of IGF-1 overexpression on hepatic fibrosis and hepatocyte senescence showed that on the 28th day,compared with those of control group,both the score of Ishak liver inflammation and necrosis and the score of Ishak liver fibrosis were increased in the CCl4 group,CCl4 + LV-CTR group and CCl4 + LV-IGF-1 group (0,14.55 ±1.94,15.43 ±2.19 and 10.29 ±1.47,respectively;0,3.51 ±0.51,3.21 ±0.79 and 1.32 ±0.40,respectively).The area of liver tissues by Masson staining (0.45 ±0.40,5.62 ± 1.08,6.03 ± 0.65 and 2.88 ± 1.54),SA-β-Gal staining (1.75 ± 0.80,4.28 ± 1.19,4.92 ± 1.14,3.11 ± 0.79),p53 (2.02 ±0.81,4.36 ±1.02,4.72 ±0.72 and 3.58 ±0.70) and progerin (0.72 ±0.40,4.52±1.01,4.01 ± 1.25 and 2.66 ± 0.80) all were increased.The levels of serum IGF-1 all were decreased ((632.00 ± 6.04),(503.00 ± 40.42),(508.00 ± 21.94) and (572.40 ± 5.94) ng/L).However the levels of ALT all were increased ((11.20 ± 5.97),(214.00 ± 73.90),(245.00 ± 76.06) and (30.00 ± 5.00) U/L).The relative expression levels of p53 (0.58 ± 0.06,1.78 ± 0.18,1.72 ± 0.10 and 1.23 ± 0.22) and progerin (0.12 ± 0.02,0.78 ± 0.15,1.32 ± 0.20 and 0.81 ± 0.16) in the primary hepatocytes were increased.The differences were all statistically significant (F =91.674,90.778,32.982,9.726,10.640,17.029,103.910,30.059,64.707 and 97.457,all P ＜ 0.05).Compared with those of CCl4 + LV-CTR group,the score of Ishak liver inflammation and necrosis and the score of Ishak liver fibrosis were decreased in the rats' liver tissues of CCl4 + LV-IGF-1 group,the areas of Masson staining,SA-β-Gal staining,p53 and progerin in the liver tissues were decreased,the level of serum IGF-1 was increased,the level of ALT was decreased,and the relative expression levels of p53 and progerin in primary hepatocytes both were decreased.The differences were all statistically significant (all P ＜ 0.05,respectively).Conclusions Hepatocyte senescence increases in the process of liver fibrosis induced by CCl4.Overexpression of IGF-1 may alleviate liver injury,improve hepatocyte senescence and liver fibrogenesis by regulating the nuclear p53/progerin pathway.
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Objective To investigate the effects of bone marrow mesenchymal stem cells (BMSC) on the expression of inflammatory factors in rats with multiple organ dysfunction syndrome (MODS). Methods BMSC extracted from the 4-week-old Sprague-Dawley (SD) rats was cultivated and identified in vitro, then the 4th passage of which was used in the experimental study. Sixty SD rats were randomly(random number) divided into three groups (n=20 in each group): Sham group (SG), MODS group (MG) and BMSC group (BG). Rats in the MG was injected by 1 mg/kg lipopolysaccaride (LPS) via great saphenous vein, rats in the SG injected with the same volume sterile phosphate buffer saline and rats in the BG infused by 1×106/cells BMSCs through the tail vein at 2 h after LPS injection. The survival rate, tissue pathological changes of the lung, liver and heart by hematoxylin and eosin (HE) staining, organ dysfunction measurement by blood gas analysis and biochemical indicators as well as the related inflammatory factors by protein microarray and enzyme linked immunosorbent assay (ELISA), were detected 72 h post operation. Multi-group quantitative data was analyzed by one way ANOVA, paired-comparisons by LSD-t test and the comparisons of survival curves in the three groups by Log-rank test. The value of P<0.05 was considered statistically significant. Results The survival rate in SG, MG and BG was 100％, 60％ and 80％, respectively. The survival curves showed that the survival rate of SG was higher than the MG and BG (SG vs. MG, χ2=9.798, P=0.0017; SG vs. BG, χ2=4.333, P=0.0374), but there was no significant difference comparing the BG to the MG (χ2=2.408, P=0.1207). The tissue congestion and edema, and inflammatory cells infiltration in the lung, liver, and heart of the MG were observed by HE staining, while these changes reduced in the BG. Compared with the SG, the levels of pH and PaCO2 and lactic acid (Lac) increased significantly (all P<0.01), the level of total bilirubin (TB) significantly increased [(0.801±0.501)U/L vs. (2.533±0.382)U/L, P=0.003], while the albumin(ALB) level decreased significantly[(35.471±4.015)U/L vs. (23.202±4.872)U/L, P<0.01], and creatine kinase (CK) level increased significantly in MG [(315.670±41.402) vs. (708.250±219.201), P=0.042]. After BMSC treatment, the organ function improved significantly (all P<0.05). Gamma interferon (IFN-γ) and monocyte chemotactic protein 1 (MCP-1) were the differential expression factors in protein chips. The results of ELISA were similar to the protein chips: compared with the SG, IFN-γ and MCP-1 expressions in the MG increased significantly (P<0.01). Compared with MG, the expressions of IFN-γ and MCP-1 decreased significantly in the BG (P<0.01). Conclusion BMSC administration could modulate the inflammatory response of MODS rats by inhibiting the levels of IFN-γ and MCP-1, and improve the organ function and the survival rate.
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Objective To analyze drug resistance and epidemic features of Acinetobacter baumannii in two hospitals of Rushan city .Methods Acinetobacter baumannii strains were collected from Rushan People′s Hospital and Chinese Medicine Hospital of Rushan in 2015 .Antimicrobial susceptibility test was carried out by Kirby-Bauer(K-B) method .Homology analysis were conducted by pulsed-field gel electrophoresis(PFGE) in 50 Acinetobacter baumannii strains .Results There were 158 Acinetobacter baumannii strains were isolated ,108 strains were from Rushan People′s Hospital ,50 strains were from Chinese Medicine Hospital of Rushan . 59 .9% strains was from sputum specimens .The most strains were from Respiratory department (39 .8% ) and ICU (25 .3% ) .All strains were resistant to aztreonam ,ampicillin and cefoxitin ,but sensitive to polymyxin B and tigecycline .50 strains could be divided into five types(A -E) .A typewas the predominant type ,including A1 ,A2 ,A3 three subtypes .Conclusion The resistance of Acine-tobacter baumannii was serious in the two hospitals in Rushan city .It mainly cause respiratory infections ,and could spread among different departments .The most strains were from Respiratory Department and ICU .
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Objective To analyze drug resistance and epidemic features of Acinetobacter baumannii in two hospitals of Rushan city .Methods Acinetobacter baumannii strains were collected from Rushan People′s Hospital and Chinese Medicine Hospital of Rushan in 2015 .Antimicrobial susceptibility test was carried out by Kirby-Bauer(K-B) method .Homology analysis were conducted by pulsed-field gel electrophoresis(PFGE) in 50 Acinetobacter baumannii strains .Results There were 158 Acinetobacter baumannii strains were isolated ,108 strains were from Rushan People′s Hospital ,50 strains were from Chinese Medicine Hospital of Rushan . 59 .9% strains was from sputum specimens .The most strains were from Respiratory department (39 .8% ) and ICU (25 .3% ) .All strains were resistant to aztreonam ,ampicillin and cefoxitin ,but sensitive to polymyxin B and tigecycline .50 strains could be divided into five types(A -E) .A typewas the predominant type ,including A1 ,A2 ,A3 three subtypes .Conclusion The resistance of Acine-tobacter baumannii was serious in the two hospitals in Rushan city .It mainly cause respiratory infections ,and could spread among different departments .The most strains were from Respiratory Department and ICU .
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In this study, a novel tetrapeptide hydrophilic interaction chromatography (HILIC) material was synthesized, and corresponding enrichment method for glycopeptides was developed.The tetrapeptide modified silica gel materials (denoted as Poly-DAPD) were synthesized by atom-transfer radical-polymerization (ATRP) and characterized by N2 adsorption desorption and thermometer, thermal gravimetric analyzer (TGA) and X-ray photoelectron spectrometer (XPS).The characterization results indicated that tetrapeptide had been successfully synthesized on silica gel.Poly-DAPD materials showed high enrichment selectivity toward fetuin glycopeptides under solid-phase extraction (SPE) mode.Comparing with commercialized ZIC-HILIC in glycopeptides enrichment of fetuin digest which mixed with 5 mole ratio of albumin bovine (BSA), the as-prepared materials showed higher selectivity in both aspects of the identified number of glycopeptides and anti-interference property.The SPE results demonstrated that the tetrapeptide-based HILIC materials could be a potential tool in large-scale glycosylation analysis.
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<p><b>OBJECTIVE</b>To analyze the clinical and genetic features of 9 ethnic Han Chinese patients with disseminated superfacial actinic porokeratosis (DSAP).</p><p><b>METHODS</b>Genomic DNA was extracted from peripheral blood samples collected from the patients. PCR and direct sequencing were carried out for five patients from a family, 4 sporadic cases, and 120 healthy controls to identify potential mutations of four genes (MVK, MVD, PMVK, FDPS) involved in the mevalonate pathway as well as SLC17A9, SSH1, and SART3 genes. Pathogenecity of suspected mutations were assessed with SIFT, and Polyphen-2 scores.</p><p><b>RESULTS</b>A c.746T>C mutation was identified in the family and two sporadic cases, while a c.875A>G mutation was identified in another sporadic case. No mutation was identified in the remainder genes among all patients. Scoring has suggested that the c.746T>C and c.875A>G mutations of the MVD gene are probably pathogenic.</p><p><b>CONCLUSION</b>c.746 T>C and c.875A>G of the MVD gene are most common mutations. Skin rashes of the patients have a strong connection with the sunlight, albeit a significant difference among patients was discovered.</p>
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Aged, 80 and over , Female , Humans , Male , Middle Aged , Case-Control Studies , Mutation , Genetics , Pedigree , Porokeratosis , GeneticsABSTRACT
Objective:To research on the genetic polymorphism distributions of fifteen short tandem repeat ( STR ) loci (D8S1179,D21S11,D7S820,CSF1PO,D3S1358,TH01,D13S317,D16S539,D2S1338,D19S433,VWA,TPOX,D18S51,D5S818, FGA) in Han race of Yunnan. Methods:A total of 313 specimens were collected from the unrelated individuals in Yunnan Han popu-lation. Genome DNA was extracted and amplified by multiplex PCR technique,the PCR products were analyzed by ABI-3130 genetic analyzer capillary electrophoresis detection, collected statistics of each STR loci genotypic frequency, and carried out the Hardy-Weinberg Genetic balance test. Results: No significant deviation from the Hardy-Weinberg Equilibrium was observed ( P>0. 05 ) , the heterozygosity of the fifteen STR loci in Yunnan Han population were found to be 0. 636-0. 901, Probability match was 0. 034-0. 220. Discrimination power of signal STR loci was 0. 780-0. 966, power of paternity exclusion was 0. 336-0. 797, polymorphism information content was 0. 555-0. 860,the combined accumulation discrimination power and exclusion probability for the 15 STR loci in Yunnan Han population were determined to be more than 0. 999 999 99 and 0. 999 998 408. The allele frequency of the 15 STR loci had a similarity compared with other areas in China,but also had a slight regional differences. Conclusion: The 15 STR loci( D8S1179, D21S11,D7S820, CSF1PO, D3S1358, TH01, D13S317, D16S539, D2S1338, D19S433, VWA, TPOX, D18S51, D5S818, FGA ) demonstrate high genetic polymorphism in Yunnan Han population, they have a high forensic science application value in paternity testing and individual identification.
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Objective To explore differences in phototest and photopatch test results, and in skin color?related parameters between healthy subjects and patients with chronic actinic dermatitis (CAD), and to examine their relationship with the melanocortin?1 receptor gene(MC1R)Arg163Gln variant. Methods Phototests were performed by using a sun simulator SUN1000, and skin color was analyzed by using Hexameter MX18 in 25 patients with CAD and 25 healthy subjects. The MC1R genotype at position?163 was determined by PCR. Photopatch tests were performed on 25 patients with CAD and 5 healthy subjects using a standard series of photoallergens(RuiMin)and an ultraviolet (UV)phototherapy equipment, SS?03A. Results Regarding phototest results, both UVA?minimal persistent pigment darkening dose(MPPD)and UVB?minimal erythema dose(MED)were significantly lower in CAD patients compared with healthy controls (both P 0.05), but that of the CAA genotype differed significantly between the two groups(P<0.01). UVA?MPPD and UVB?MED were both significantly lower in CAD patients with the CAA genotype at position?163 in the MC1R gene than in those without the genotype(P=0.055, 0.325, respectively). Conclusions Skin photobiological testing plays a critical role in the diagnosis of CAD. Further studies are needed to clarify the role of the CAA genotype at position?163 in the MC1R gene in the diagnosis, prevention and treatment of CAD.
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Objective To assess the diagnostic value of capsule endoscopy (CE) and CT virtual endoscopy (CTVE) for small intestinal diseases.Methods The data of 31 patients with suspected small bowel diseases who were examined by both CTVE and CE were collected.The diagnostic rates of CE and CTVE was compared by paired data McNemar test,using the diagnosis confirmed by surgery or follow-up as the golden standard.Results The confirmed diagnosis of 31 patients were small intestinal tumor in 16,nontumorous lesion in 10 and no abnormal lesion in 5.CE identified positive findings in 24 patients,including 14 cases of tumorous lesion (with mis-location in 2 and failure in definite diagnosis in 7) and 10 cases of non-tumorous lesion.CTVE identified positive findings in 17 patients,including 14 cases of tumorous lesion (with mis-location in 1 and failure in definite diagnosis in 4) and 3 cases of non-tumorous lesion.The combination of CE and CTVE could identified positive findings in 26 patients,including 16 tumorous and 10 nontumorous lesions.The diagnostic rates of CE and CTVE for tumorous lesions were both 87.5％ (14/16).The overall diagnostic rate of combined CE and CTVE was 83.9％ (26/31),which was significantly higher than that of CTVE alone (54.8％,17/31) but similar to that of CE alone (77.4％,24/31).Conclusion Both CE and CTVE are effective in diagnosis of small intestinal lesions and the combined use of 2 methods can increase diagnosis yield.
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ObjectiveTo study the biological characterization and the genetic background of circulating CA16 strains in mainland of China for the purpose of CA16 vaccine development in the future.MethodsCA16 strains were isolated from throat swabs of patients with hand-foot-mouth disease and identified by neutralization assay and RT-PCR.The genotype of these isolates were determined by sequence alignment and phylogenetic analysis of VP1 gene.The proliferation dynamics and the plaque morphology were observed when propagated in Vero cells.The pathogenicity of these CA16 isolates was evaluated by challenging newborn mice.ResultsIn this study,six CA16 circulating isolates,BJ-1-6 were obtained.The RT-PCR products were 150 bp amplified with the general enterovirus primers and 210 bp with CA16 primers respectively,which cannot be amplified by EV71 primers.Additionally,these isolates were identified to display some obvious proliferation dynamics and plaque morphology when propagated for 96 h in Vero cells.The diameter of plaques were about 1.5 to 2 mm for BJ-1,BJ-2,BJ-4,BJ-6,4-5 mm for BJ-3 and 3 mm for BJ5,the plaques were regular except BJ-3.All the six isolates can be neutralized by the convalescent serum of patient infected with CA16.The virus titer of different isolates propagated for five passages in Vero cells was 7.0LgCCID50/ml.The sequence alignment of VP1 gene demonstrated that the genotypes of BJ-2,BJ-4,BJ5 were C1 and BJ-1,BJ-3,B J-6 were C,3 comparatively.The genetic distance of the VPI gene from theseisolates suggested that they were highly genetic identity with the homology of 90％ in nucleotide and 99％ in dedicated amino acid respectively.However,a distinctive difference in pathogenic ability in neonatal mice was found that the suckling mice challenged with BJ-3 & BJ-5 were paralyzed 4-5 d and dead 6-7d postchallenge,compared with the control group without any abnormality in the during of 14 d.ConclusionThe circulating CA16 isolates in China have different biological characteristics,different pathogenic ability and similar genetic backgrounds,which is helpful for the development of a CA16 vaccine in the future.
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Objective To construct an infectious full-length cDNA clone of enterovirus 71(EV71)and develop a technological platform for study on vaccine development as well as molecular virology of EV71.Methods According to the nucleotide sequence of EV71 strain 085 isolated in China,four pairs of primers were designed for amplification of four end to end overlapping subgenomic cDNA fragments,the cDNA fragments were directional cloned into pBluescript SK(+)vector,and the virus genome cDNA clone was obtained by ligation orderly.The rescued virus of parental strain 085 from RNA transfected host cells was identified by RT-PCR,IFA,titration as well as transmission electron microscope(TEM)after the transcription of the full-length cDNA clone in vitro.Results The full-length cDNA clone was constructed successfully,and the typical CPE was observed after its transcription into Vero cells.The rescued virus with 20-30 nm in diameter can not only be neutralized by EV71 special anti-serum but also react with anti-EV71 monoclonal antibody that virus infected cells stained with FITC can be detected by IFA.After amplification from the total RNA extraction of virus infected cells by RT-PCR with EV71 special primers,the 226 bp products can be detected.The growth curve showed that the rescued virus can propagate in Vero cells stably with a titer of 4.5 ～6.0 lgCCID50/ml during 8 passages.The plaque formed by rescued virus is identical as parental virus in morphology but smaller in size.Conclusion An infectious full-length clone of EV71 was developed successfully,which will be used for further study on pathogenesis and vaccine development of EV71.
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Objective To construct a recombinant adenovirus contained respiratory syncytial virus F gene fragment. Methods The F gene fragment was amplified by RT-PCR. Then the recombinant shuttle plasmid pShuttle-CMV/F was constructed. The iinearized pShuttle-CMV/F was transformed into BJ5183-AD-1 electroporation competent cells which contained plasmid pAdEasy-1. The obtained homologous recom-binant plasmid was named pAdEasy/F, and transfected into 293 cells. Then the recombinant adenovirus rAd/F was obtained, and it was tested by electron microscope, RT-PCR, Western blot and immuno-fluores-cence assay(IFA). The vires titer and genetic stability were also studied initially. Results The recombi-nant adenovirus rAd/F was constructed, which was visualized as typical adenovirus morphology under elec-tron microscope. The transcription and expression of RSV F gene fragment integrated in the rAd/F were con-finned by RT-PCR, Western blot and IFA. Conclusion The recombinant adenovirus rAd/F contained RSV F gene fragment is successfully constructed and lay an important foundation for the further vaccine study.
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Objective To compare the therapeutic result of endoscopic po lypectomy with colectomy for polypoid malignant colorectal tumor. Methods A tot al of 61 cases of polypoid malignant colorectal tumor including thirty－ nine pa tients treated by endoscopic polypectomy and surveillance,twenty－ two patients treated by colectomy.Follow－ up ranged from 28 to 168(mean 64) months. Results During the follow－ up period,one patient died relating to this disease,two rec urred at the original site,and one metastasized to the liver.The distribution of the adverse outcome had no significant statistical difference between the group of endoscopic polypectomy and colectomy;significant difference existed between the sessile and pedunculated malignant polyps (P=0.006),as well as between favou rable(carcinoma invading the muscularis mucosa or above,limited to the head of t he pedunculated polyp,polypectomy margin negative,and well and moderately differ entiated)and unfavourable(without those criteria) histologic characteristics(P=0 .002).Conclusion The polypoid malignant colorectal tumors with favourable his tologic characteristics could be treated by endoscopic polypectomy alone,tumors with unfavourable histologic characteristics should be treated by colectomy.
ABSTRACT
Aim To evaluate the effect of 15d-PGJ2 on up-regulated expression of PPAR? and inducing HSC apoptosis and inhibiting HSC proliferation. Methods The rat liver stellate cell line (HSC-T6) was cultured in DMEM, and treated with PPAR? agonist 15d-PGJ2 of different concentrations. The expression of PPAR? mRNA was detected by RT-PCR. The protein expression of NF-?B was examined by Western blot. The cell proliferation rate of HSC-T6 was determined by MTT colorimetric assay. The cell cycle and apoptosis ratio were measured using flow cyto -metry analysis. Results The proliferation rate of the rat liver stellate cell line (HSC-T6) was significantly inhibited by 15d-PGJ2 (vs controls, P