Eradication rates of Helicobacter pylori in treatment-naive patients following 14-day vonoprazan-amoxicillin dual therapy: A multicenter randomized controlled trial in China.

BACKGROUND: Potassium-competitive acid blockers (P-CAB) are recommended for the treatment of Helicobacter pylori infections, but dual therapy of P-CAB with amoxicillin has been poorly studied. The current study compared the efficacy, adverse reactions, compliance, and effects on gut microbiota of 14-day vonoprazan-amoxicillin (VA) dual therapy with esomeprazole, bismuth potassium citrate, amoxicillin, and metronidazole (EBAM) quadruple therapy in treatment-naive patients with H. pylori. MATERIALS AND METHODS: This was a multicenter, open-label, randomized, and controlled, non-inferiority study. Patients (n = 194) enrolled from six centers were randomly divided into either the VA or EBAM group. H. pylori eradication was determined using 13 C urea breath tests (UBT) 4-6 weeks post-treatment. Fecal samples were collected, and gut microbial populations were analyzed by 16S rDNA and metagenomic sequencing technology. RESULTS: Eradication rates of H. pylori in the VA and EBAM groups were 88.7% and 91.8%, respectively, according to intention-to-treat (ITT) analysis; 95.6% and 96.7% with per-protocol (PP) analysis; and 94.5% and 96.7% with modified ITT (mITT) analysis (all p > 0.05). The incidence of adverse reactions in the VA group was significantly lower compared to the EBAM group, and compliance within both groups was good. There was no difference in α-diversity or microbial composition in the VA and EBAM groups at one-month post-treatment compared to baseline, except for a markedly reduced abundance of Bacteroides in the EBAM group. CONCLUSION: VA therapy achieved excellent eradication rates with low adverse reactions, good compliance, and little impact on gut microbiota. VA therapy should be recommended as a first-line treatment against H. pylori.

Effect of Microvascular Endothelial Cells on the Proliferation of Bone Marrow Hematopoietic Stem Cells under Different Culture Conditions / 中国实验血液学杂志

OBJECTIVE@#To investigate the effect of microvascular endothelial cells (MEC) on the proliferation of hematopoictic stem cells (HSC) under different culture conditions in vitro.@*METHODS@#The MEC from lung tissue of C57BL/6 mice and the HSC from bone marrow of GFP mice were used for non-contact co-culture, 2 D contact co-culture, at same time the single MEC and single HSC culture were seted up and were used as control group. The cell counting and CCK-8 method were used to detect and compare the proliferation levels of suspension cells in different groups on day 1, 3, 5 and 7.@*RESULTS@#MEC presented adherent growth. In process of cell culture in vitro, the number of suspension cells in MEC and HSC co-culture group and single HSC culture group increased, the suspension cells in 2D contact and non-contact co-culture groups more early gated into logarithmic growth phase as compared with suspension cells in control group, the proliferation level of suspention cells in 2D contact culture group was higher than that in non-contact co-culture group and single HSC culture group (P<0.05), the proliferation level of suspension cells in non-contact co-culture group was higher than that in single HSC culture group (P<0.05).@*CONCLUSION@#The culture of HSC in vitro can proliferate HSC, MEC can promote the proliferation of HSC, MEC also can promote the HSC proliferation by non-contact co-culture in vitro, which relates with the effect of cytokines secreted from MEC; the effect of MEC and HSC contact co-culture on the proliferation of HSC is stronger than that of non-contact co-culture, which relates with the regulation of cell-cell contact.

Effect of Shh and BM-MSC Synergism on the Proliferation of Hematopoietic Stem Cells / 中国实验血液学杂志

<p><b>OBJECTIVE</b>To study the effect and mechanism of shh and mesenchymal stem cell（MSC）synergism on the proliferation of hematopoietic stem cells in noninvasive co-culture system in vitro.</p><p><b>METHODS</b>The mesenchymal stem cells were cultured in vitro，CD34 cells were sorted by mini MACS magnetic bead separator，flow cytometry was used to identify the purity of 2 cells. CD34 cells and MSCs were seeded to upper and low of transwell respecibely for non-contact coculture，and add exogenous shh protein for intervenece. The number of MSCs and HSCs，the total amount of RNA，the expression of ki67 and Tie-2 mRNA of HSC，the expression of VEGF and Ang-1 mRNA of MSC were detected for investigating the condition of cell proliferation and the expression of angiogenic factors.</p><p><b>RESULTS</b>The total number of cells，the total amount of RNA and the relative expression of ki67, Tie-2, VEGF and Ang-1 in non-contact co-culture group increased and showed the following trends on the 7th day：the above-mentioned indexes in group MSC + HSC, group shh + HSC were higher than those in group HSC, while those in MSC + shh + HSC Group was higher than those in MSC + HSC and shh + HSC group.</p><p><b>CONCLUSION</b>Angiogenic factors help MSC to proliferate HSC and amplify the CD34 hematopoietic stem/progenitor cells by shh and MSC synergism in vitro coculture system which may be related with angiogenic factors.</p>

Coculture with mesenchymal stem cells facilitates the proliferation of hematopoietic stem cells under different coculture modes / 中国组织工程研究

BACKGROUND: Although a large number of related studies have been carried out, there is still a lack of practical methods to amplify hematopoietic stem cells(HSCs)in vitro.Mesenchymal stem cells(MSCs)secrete a variety of cytokines that promote the HSCs proliferation and inhibit their differentiation. These cytokines play an important role in maintaining the hematopoietic microenvironment and regulating HSCs function. OBJECTIVE:To investigate the effect of bone marrow MSCs on the proliferation of HSCs in vitro under different coculture modes. METHODS:Mesenchymal stem cells from the bone marrow of C57BL/6 mice were cultured in vitro using the whole bone marrow adherent culture. CD117+cells (HSCs) were sorted from passage 3 cells by using miniMACS magnetic beads sorting. Then, CD117+cells were co-cultured with MSCs under different coculture models, including single culture of HSCs (control group), Transwell coculture (upper chamber, HSCs; lower chamber, MSCs) and two-dimensional contact coculture (coculturing HSCs and MSCs in 24-well plates). The morphology of HSCs was observed under phase contrast microscope and fluorescence microscope, and the number of active cells of HSCs was counted at 1, 3, 5, and 7 days after coculture. RESULTS AND CONCLUSION: During the coculture of 1-7 days, the number of HSCs in the two groups was increased with culture time (P <0.05). After 3 days of coculture, HSCs in each group was grown into the logarithmic growth phase, and morphological changes in some HSCs were detected at 5 days of coculture. At 7 days of coculture, the viabilities of HSCs in different culture models were ranked as follows: single culture model < Transwell coculture model < two-dimensional contact coculture model (P < 0.05). These findings suggest that MSCs can effectively promote the proliferation of HSCs in vitro,and the promotion effect is increased under contact coculture conditions.

miRNA-regulated delivery of lincRNA-p21 suppresses ß-catenin signaling and tumorigenicity of colorectal cancer stem cells.

Cancer stem cells (CSCs) are key cellular targets for effective cancer therapy, due to their critical roles in cancer progression and chemo/radio-resistance. Emerging evidence demonstrates that long non-coding RNAs (lncRNAs) are important players in the biology of cancers. However, it remains unknown whether lncRNAs could be exploited to target CSCs. We report that large intergenic non-coding RNA p21 (lincRNA-p21) is a potent suppressor of stem-like traits of CSCs purified from both primary colorectal cancer (CRC) tissues and cell lines. A novel lincRNA-p21-expressing adenoviral vector, which was armed with miRNA responsive element (MRE) of miR-451 (Ad-lnc-p21-MRE), was generated to eliminate CRC CSCs. Integration of miR-451 MREs into the adenovirus efficiently delivered lincRNA-p21 into CSCs that contained low levels of miR-451. Moreover, lincRNA-p21 inhibited the activity of ß-catenin signaling, thereby attenuating the viability, self-renewal, and glycolysis of CSCs in vitro. By limiting dilution and serial tumor formation assay, we demonstrated that Ad-lnc-p21-MRE significantly suppressed the self-renewal potential and tumorigenicity of CSCs in nude mice. Importantly, application of miR-451 MREs appeared to protect normal liver cells from off-target expression of lincRNA-p21 in both tumor-bearing and naïve mice. Taken together, these findings suggest that lncRNAs may be promising therapeutic molecules to eradicate CSCs and MREs of tumor-suppressor miRNAs, such as miR-451, may be exploited to ensure the specificity of CSC-targeting strategies.

Efficacy and safety of esomeprazole with flupentixol/melitracen in treating gastroesophageal reflux disease patients with emotional disorders.

BACKGROUND AND AIM: This study was designed to demonstrate the safety and efficacy of esomeprazole combined with flupentixol/melitracen for the treatment of gastroesophageal reflux disease (GERD) patients with emotional disorders. METHODS Two hundred eighty-nine GERD patients with emotional disorders were divided randomly into two groups: group 1 received esomeprazole only (monotherapy) and group 2 received esomeprazole and flupentixol/melitracen (combination therapy). The patients' GERD questionnaire (GerdQ) and hospital anxiety and depression (HAD) scores were obtained before and after treatment. Changes in the scores, rates of symptom remission, and adverse effects were compared between the two groups. RESULTS: After 2 weeks of treatment, the average decrease in GerdQ score in the combination group (4.04 ± 2.34) was significantly greater than that in the monotherapy group (3.34 ± 2.74; P < 0.05). Significant differences between the two groups were also found for changes in HAD anxiety scores (5.45 ± 2.41 vs 3.34 ± 2.43, P < 0.05), depression scores (5.47 ± 2.47 vs 3.00 ± 3.28, P < 0.05), and anxiety-depression scores (5.20 ± 2.71 vs 3.60 ± 2.56, P < 0.05). The remission of symptoms (eructation, abdominal pain, anorexia, and other accompanying symptoms) in the combination group was significantly better than that in the monotherapy group, and no significant difference in the incidence of adverse events was observed between the two groups. CONCLUSIONS: The combination therapy has better efficacy than the monotherapy in improving the symptoms of gastroesophageal reflux in patients with emotional disorders. In addition, this combination treatment is safe, with a low incidence of adverse events.

Unsedated transnasal upper gastrointestinal endoscopy has favorable diagnostic effectiveness, cardiopulmonary safety, and patient satisfaction compared with conventional or sedated endoscopy.

BACKGROUND: To assess the diagnostic effectiveness, cardiopulmonary safety, and patient comfort of transnasal endoscopy (TNE), compared with conventional endoscopy (CES) and sedated endoscopy (SES), and to compare procedural risks and patient satisfaction/preference. METHODS: In this prospective, randomized, and controlled protocol, eligible patients (n = 397) in an outpatient clinic were randomized to CES (n = 133), SES (n = 134), or unsedated TNE (n = 130) due to upper gastrointestinal (GI) complaints. Patients were continuously monitored for systolic/diastolic blood pressure (SBP/DBP), pulse rate (PR), and SpO(2) throughout the endoscopy. All subjects (n = 392) completing their assigned endoscopy were asked to evaluate endoscopy satisfaction, pain, and nausea/vomiting on visual analog scales. Patient preference for the assigned endoscopy was assessed against previous endoscopy experience or by willingness to repeat the assigned endoscopy. RESULTS: Endoscopic outcomes for the esophagus, stomach, and duodenum were comparable among the three groups. SBP/DBP and PR were more stable in patients undergoing TNE than in those undergoing CES or SES, while SpO(2) remained stable and above 95% among all three groups. Patients were more satisfied with TNE than with CES and experienced less pain and nausea/vomiting. Patients exhibited a high preference for SES, whereas 67.6% of patients who previously underwent SES and were randomly assigned to TNE were willing to undergo TNE again. CONCLUSIONS: TNE has comparable diagnostic effectiveness to CES and SES, but is less stressful on cardiopulmonary function, indicating that TNE is a more comfortable, preferred, and cost-effective endoscopic technique than CES and SES.

Again review of research design and statistical methods of Chinese Journal of Cardiology / 中华心血管病杂志

<p><b>OBJECTIVE</b>To re-evaluate and compare the research design and the use of statistical methods in Chinese Journal of Cardiology.</p><p><b>METHOD</b>Summary the research design and statistical methods in all of the original papers in Chinese Journal of Cardiology all over the year of 2011, and compared the result with the evaluation of 2008.</p><p><b>RESULTS</b>(1) There is no difference in the distribution of the design of researches of between the two volumes. Compared with the early volume, the use of survival regression and non-parameter test are increased, while decreased in the proportion of articles with no statistical analysis. (2) The proportions of articles in the later volume are significant lower than the former, such as 6(4%) with flaws in designs, 5(3%) with flaws in the expressions, 9(5%) with the incomplete of analysis. (3) The rate of correction of variance analysis has been increased, so as the multi-group comparisons and the test of normality. The error rate of usage has been decreased form 17% to 25% without significance in statistics due to the ignorance of the test of homogeneity of variance.</p><p><b>CONCLUSION</b>Many improvements showed in Chinese Journal of Cardiology such as the regulation of the design and statistics. The homogeneity of variance should be paid more attention in the further application.</p>

[SREBP-1c knockdown attenuated fatty degeneration in hepatic L02 cells and inhibited CCL2 and FGF21 protein expression].

OBJECTIVE: To study the effect of SREBP-1c silencing on lipid metabolism and expression of inflammatory chemokines in a NAFLD model with endoplasmic reticulum stress. METHOD: NAFLD model was established in L02 cells treated with oleic acid. SREBP-1c expression was inhibited using RNA interference with a p Silencer-1.0-U6-4476 vector. After transfection with p Silencer-1.0-U6-4476 or control vector for 0 h, 24 h, 48 h and 72 h, the extent of fatty degeneration was shown by Oil Red O staining. The mRNA and protein expression of inflammatory chemokine CCL2 and basic fibroblast growth factor-21 (FGF21) were determined by real time PCR and Western blot respectively. RESULTS: SREBP-1c silenced L02 cells showed fat droplets with smaller diameter and attenuated fatty deposition, as compared with control cells. The relative CCL2 mRNA levels in SREBP-1c silencing vector transfected L02 cells were 1.03+/-0.11 for 0 h, 1.11+/-0.21 for 24 h, 0.88+/-0.16 for 48 h, and 1.05+/-0.15 for 72 h, which showed no significant difference as compared with control cells (P>0.05, respectively). In addition, no difference was found between the different time points within the same group (P>0.05). However, CCL2 protein levels in SREBP-1c silenced cells were 1.19+/-0.15, 1.07+/-0.18, 0.48+/-0.14, and 0.05+/-0.24 after transfection for 0 h, 24 h, 48 h, and 72 h respectively, which were significantly downregulated as compared to the control group (P<0.01). And CCL2 protein levels between different time points in SREBP-1c silenced cells were also distinct (P<0.01). The relative FGF21 mRNA levels in SREBP-1c silenced L-02 cells were 1.01+/-0.08, 0.91+/-0.22, 0.98+/-0.20, and 1.02+/-0.12 for 0 h, 24 h, 48 h, and 72 h respectively, which were not statistically different as compared with the corresponding control cells. Statistic difference of FGF21 mRNA levels in SREBP-1c knockdown cells of different time points was not found (P>0.05). In striking contrast, robust down regulation of FGF21 protein in SREBP-1c silenced cells was observed, with 0.81+/-0.05, 0.66+/-0.12, 0.58+/-0.08 and 0.19+/-0.13 after transfection for 0 h, 24 h, 48 h and 72 h respectively, as compared to control group (P<0.01). And differences in FGF21 protein level between different time points in SREBP-1c silenced cells were also demonstrated (P<0.01). CONCLUSION: SREBP-1c knockdown attenuated fatty deposition in oleic acid treated L02 cells. In addition, silencing of SREBP-1c expression reduced expressions of CCL2 and FGF21 proteins posttranscriptionally, which may play a role in endoplasmic reticulum stress induced inflammatory response in NAFLD.

Knockdown of ezrin via RNA interference suppresses Helicobacter pylori-enhanced invasion of gastric cancer cells.

BACKGROUND AND AIM: H. pylori interacts with gastric epithelial cells, which may activate signaling pathways important for gastric cancer invasion. Ezrin, a membrane cytoskeletal crosslinker protein, is well documented to regulate cell adhesion and cell motility. The aim of the present study was to determine whether ezrin is involved in H. pylori-induced cancer cell motility and invasion. METHODS: The VIL-2 of RNA interference plasmid vector and control plasmid vector were constructed. AGS (a human gastric adenocarcinoma cell line) cells were transfected by these plasmid vectors. The stable expression cell lines AGS(ezrin) was obtained by G418 resistance screening. The express levels of ezrin protein and the cellular invasive potential of four groups, including the AGS control, AGS(ezrin) control, AGS co-culture with H. pylori, AGS(ezrin) co-culture with H. pylori were detected. Meanwhile, the morphology, cell migration and adhesion were determined respectively. RESULTS: Co-culture with H. pylori stimulated AGS cell motility and invasion, up-regulated ezrin expression at the protein level and induced a Hummingbird phenotype. The silencing of ezrin expression suppressed the motility and invasion of gastric cancer cells and inversed the cell invasion phenotype and enhanced the ability for cell adhesion. CONCLUSION: Knockdown of ezrin by RNAi suppresses H. pylori-enhanced migration and invasion of gastric cancer cells. These findings indicate that ezrin may play a key role in the migration and invasion of gastric cancer cells, and thus may be a therapeutic target to prevent metastasis of gastric cancer promoted by H. pylori infection.

Involvement of VDAC1 and Bcl-2 family of proteins in VacA-induced cytochrome c release and apoptosis of gastric epithelial carcinoma cells.

OBJECTIVE: It is known that the vacuolating cytotoxin (VacA) could induce apoptosis. However, the mechanism remained to be elucidated. The aim of this study is to investigate the role of Bcl family of proteins (Bcl-2 and Bax) and the mitochondrial voltage-dependent anion channel (VDAC) in VacA-induced apoptosis of AGS cells. METHODS: Plasmid pGBKT7-VacA p58 was constructed and transfected into the AGS cells. RT-PCR and Western blotting were used to determine the expressions of cytochrome c, caspase-3, Bax, Bcl-2 and VDAC1 mRNA and proteins. RESULTS: VacA p58 can induce cytochrome c release and activate caspase-3 in AGS cells. It up-regulated the expressions of Bax and VDAC1 mRNA and proteins, and decreased the expression of Bcl-2 in AGS cells. CONCLUSION: VacA p58 induces apoptosis in AGS cells. This apoptotic process is associated with the up-regulation of Bax/VDAC1 and downregulation of Bcl-2. These findings suggest that the release of cytochrome c by VacA p58 is mainly through VDAC-dependent and Bcl-2 family-dependent pathways.

[The expression and significance of osteopontin in the development of nonalcoholic fatty liver fibrosis in rats].

OBJECTIVE: To investigate the changes of osteopontin (OPN) in the liver tissues during nonalcoholic fatty liver fibrosis in rats and to explore the effect of OPN in the development of nonalcoholic fatty liver fibrosis. METHODS: Fifty-six male Wistar rats were randomly divided into a control group (8 rats) and a high-fat diet group. The high-fat diet group was divided into 6 subgroups (8 rats in each subgroup) with high-fat feedings for 4, 8, 12, 16, 20 or 24 weeks. Conventional histochemical, HE, Masson-trichrome and immunohistochemical staining for alpha-smooth muscle actin (a-SMA) were performed with the liver histological preparations. The expression of OPN was detected with reverse transcription and polymerase chain reactions and Western blot. RESULTS: Levels of OPN in liver tissues in rat nonalcoholic fatty liver fibrosis induced by high-fat diet were significantly increased over those in the control group (F=7.15, P less than 0.01). OPN expressions were closely correlated with a-SMA and nonalcoholic fatty liver fibrosis, and correlation coefficients of the two groups were 0.94 and 0.82, and both P values were less than 0.01. CONCLUSION: Expression of OPN increases dramatically in the livers during the development of nonalcoholic fatty liver fibrosis, and OPN may play an important role in this event.

[The role of mitochondrial damages in Helicobacter pylori-induced apoptosis of gastric cancer cells].

OBJECTIVE: To explain the role of mitochondrial pathway in the apoptosis of SGC-7901 cell line induced by concentrated Helicobacter pylori culture supernatant (CHCS). METHODS: Cytochrome oxidase (COX) I expression was detected by Western blotting. Cell apoptosis and mitochondrial membrane potential were measured by flow cytometry. RESULTS: CHCS could induce the apoptosis of SGC-7901 in a dose- and time-dependent manner. Apoptotic rates gradually enhanced followed by the concentrations increasing. The mitochondrial membrane potential (MMP) began to descend after treating CHCS for 4 h, and MMP descended most distinctly in 8 h. It descended the lowest point in 12 h, and it had no special changes in 24 h. The expression of COX I was notably lower than that of control group after CHCS treating (632.8 +/- 40.6 vs 895.1 +/- 44.2, P < 0.05). CONCLUSION: Mitochondrial pathway may play an important role in the apoptosis of SGC-7901 cells induced by CHCS.