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| 1 | Reduction of the closure time of postoperative enterocutaneous fistulas with fibrin sealant显示文摘AIM: To assess whether the use of fibrin sealantshortens the closure time of postoperative enterocutaneous fistulas (ECFs). METHODS: The prospective case-control study included 70 patients with postoperative ECFs with an output of < 500 mL/d, a fistulous tract of > 2 cm and without any local complication. They were divided into study (n = 23) and control groups (n = 47). Esophageal, gastric and colocutaneous fistulas were monitored under endoscopic visualization, which also allowed fibrin glue application directly through the external hole. Outcome variables included closure time, time to resume oral feeding and morbidity related to nutritional support. RESULTS: There were no differences in mean age, fistula output, and follow-up. Closure-time for all patients of the study group was 12.5 ± 14.2 d and 32.5 ± 17.9 d for the control group (P < 0.001), and morbidity related to nutritional support was 8.6% and 42.5%, respectively (P < 0.01). In patients with colonic fistulas, complete closure occurred 23.5 ± 19.5 d after the first application of fibrin glue, and spontaneous closure was observed after 36.2 ± 22.8 d in the control group (P = 0.36). Recurrences were observed in 2 patients because of residual disease. One patient of each group died during follow-up as a consequence of septic complications related to parenteral nutrition. CONCLUSION: Closure time was significantly reduced with the use of fibrin sealant, and oral feeding was resumed faster. We suggest the use of fibrin sealant for the management of stable enterocutaneous fistulas. | Jorge Avalos-González Eliseo Portilla-deBuen Caridad Aurea Leal-Cortés Abel Orozco-Mosqueda María del Carmen Estrada-Aguilar Gabriela Abigail Velázquez-Ramírez Gabriela Ambriz-González Clotilde Fuentes-Orozco Aldo Emmerson Guzmán-Gurrola Alejandro González-Ojeda | 2010 | World Journal of Gastroenterology2010，16，22： | 10 |
| 2 | Prolonged high-fat-diet feeding promotes non-alcoholic fatty liver disease and alters gut microbiota in mice显示文摘BACKGROUND Non-alcoholic fatty liver disease (NAFLD) has become an epidemic largely due to the worldwide increase in obesity. While lifestyle modifications and pharmacotherapies have been used to alleviate NAFLD, successful treatment options are limited. One of the main barriers to finding safe and effective drugs for long-term use in NAFLD is the fast initiation and progression of disease in the available preclinical models. Therefore, we are in need of preclinical models that (1) mimic the human manifestation of NAFLD and (2) have a longer progression time to allow for the design of superior treatments. AIM To characterize a model of prolonged high-fat diet (HFD) feeding for investigation of the long-term progression of NAFLD. METHODS In this study, we utilized prolonged HFD feeding to examine NAFLD features in C57BL/6 male mice. We fed mice with a HFD (60% fat, 20% protein, and 20% carbohydrate) for 80 wk to promote obesity (Old-HFD group, n = 18). A low-fat diet (LFD)(14% fat, 32% protein, and 54% carbohydrate) was administered for the same duration to age-matched mice (Old-LFD group, n = 15). An additional group of mice was maintained on the LFD (Young-LFD, n = 20) for a shorter duration (6 wk) to distinguish between age-dependent and age-independent effects. Liver, colon, adipose tissue, and feces were collected for histological and molecular assessments.RESULTS Prolonged HFD feeding led to obesity and insulin resistance. Histological analysis in the liver of HFD mice demonstrated steatosis, cell injury, portal and lobular inflammation and fibrosis. In addition, molecular analysis for markers of endoplasmic reticulum stress established that the liver tissue of HFD mice have increased phosphorylated Jnk and CHOP. Lastly, we evaluated the gut microbial composition of Old-LFD and Old-HFD. We observed that prolonged HFD feeding in mice increased the relative abundance of the Firmicutes phylum. At the genus level, we observed a significant increase in the abundance of Adercreutzia, Coprococcus, Dorea, and Ruminococcus and decreased relative abundance of Turicibacter and Anaeroplasma in HFD mice. CONCLUSION Overall, these data suggest that chronic HFD consumption in mice can mimic pathophysiological and some microbial events observed in NAFLD patients. | Kandy T Velázquez Reilly T Enos Jackie E Bader Alexander T Sougiannis Meredith S Carson Ioulia Chatzistamou James A Carson Prakash S Nagarkatti Mitzi Nagarkatti E Angela Murphy | 2019 | World Journal of Hepatology2019，11，8： | 6 |
| 3 | Gallstone ileus:One-stage surgery in a patient with intermittent obstruction显示文摘Gallstone ileus, an uncommon complication of cholelithiasis, is described as a mechanical intestinal obstruction due to impaction of one or more large gallstones within the gastrointestinal tract. The clinical presentation is variable, depending on the site of obstruction, manifested as acute, intermittent or chronic episodes. A 51-year-old female patient was referred to our hospital with 3 events of intestinal obstruction during the previous 7 d. At admission, there were clinical signs of intestinal obstruction; abdominal film demonstrated dilated bowel loops, air-fluid levels and a vague image of a stone in the inferior left quadrant. Once stabilized, a laparotomy was performed. Surgical findings were distention of the jejunum and ileum proximal to a palpable stone in the ileum as well as gallstones and a cholecystoduodenal fistula in the gallbladder. An enterolithotomy, repair of the cholecystoduodenal fistula and cholecystectomy were performed. The postoperative course was uneventful. There is no uniform surgical procedure for this disease. When the patient is too ill or when biliary surgery is not advisable, an enterolithotomy is the best option. The one-stage procedure should be the offered to adequately stabilized patients when local and general conditions, such as good cardiorespiratory and metabolic reserve permit a more prolonged surgical procedure. | Carlos M Nuo-Guzmán José Arróniz-Jáuregui Pável A Moreno-Pérez édgar A Chávez-Solís Nereida Esparza-Arias Cuauhtémoc I Hernández-González | 2010 | World Journal of Gastrointestinal Surgery2010，2，5： | 5 |
| 4 | Tumor cells educate mesenchymal stromal cells to release chemoprotective and immunomodulatory factors显示文摘Factors released by surrounding cells such as cancer-associated mesenchymal stromal cells(CA-MSCs)are involved in tumor progression and chemoresistance.In this study,we characterize the mechanisms by which naYve mesenchymal stromal cells(MSCs)can acquire a CA-MSCs phenotype.Ovarian tumor cells trigger the transformation of MSCs to CA-MSCs by expressing pro-tumoral genes implicated in the chemoresistance of cancer cells,resulting in the secretion of high levels of CXC chemokine receptors 1 and 2(CXCR1/2)ligands such as chemokine(C-X-C motif)ligand 1(CXCL1),CXCL2,and interleukin 8(IL-8).CXCR1/2 ligands can also inhibit the immune response against ovarian tumor cells.Indeed,through their released factors,CA-MSCs promote the differentiation of monocytes towards M2 macrophages,which favors tumor progression.When CXCR1/2 receptors are inhibited,these CA-MSC-activated macrophages lose their M2 properties and acquire an anti-tumoral phenotype.Both ex vivo and in vivo,we used a CXCR1/2 inhibitor to sensitize ovarian tumor cells to carboplatin and circumvent the pro-tumoral effects of CA-MSCs.Since high concentrations of CXCR1/2 ligands in patients*blood are associated with chemoresistance,CXCR1/2 inhibition could be a potential therapeutic strategy to revert carboplatin resistance. | Augustin Le Naour Melissa Prat Benolt Thibault Renaud Mével Léa Lemaitre Helene Leray Marie-Veronique Joubert Kimberley Coulson Muriel Golzio Lise Lefevre Eliane Mery Alejandra Martinez Gwénael Ferron Jean-Pierre Delord Agnès Coste Bettina Couderc | 2020 | Journal of Molecular Cell Biology2020，12，3： | 3 |
| 5 | Cognitive disorder and dementia in type 2 diabetes mellitus显示文摘Insulin,a key pleiotropic hormone,regulates metabolism through several signaling pathways in target tissues including skeletal muscle,liver,and brain.In the brain,insulin modulates learning and memory,and impaired insulin signaling is associated with metabolic dysregulation and neurodegenerative diseases.At the receptor level,in aging and Alzheimer’s disease(AD)models,the amount of insulin receptors and their functions are decreased.Clinical and animal model studies suggest that memory improvements are due to changes in insulin levels.Furthermore,diabetes mellitus(DM)and insulin resistance are associated with age-related cognitive decline,increased levels ofβ-amyloid peptide,phosphorylation of tau protein;oxidative stress,pro-inflammatory cytokine production and dyslipidemia. Recent evidence shows that deleting brain insulin receptors leads to mildobesity and insulin resistance without influencing brain size and apoptosis development.Conversely, deleting insulin-like growth factor 1 receptor (IGF-1R) affects brain size anddevelopment, and contributes to behavior changes. Insulin is synthesized locally in the brain andis released from the neurons. Here, we reviewed proposed pathophysiological hypotheses toexplain increased risk of dementia in the presence of DM. Regardless of the exact sequence ofevents leading to neurodegeneration, there is strong evidence that mitochondrial dysfunctionplays a key role in AD and DM. A triple transgenic mouse model of AD showed mitochondrialdysfunction, oxidative stress, and loss of synaptic integrity. These alterations are comparable tothose induced in wild-type mice treated with sucrose, which is consistent with the proposal thatmitochondrial alterations are associated with DM and contribute to AD development. Alterationsin insulin/IGF-1 signaling in DM could lead to mitochondrial dysfunction and low antioxidantcapacity of the cell. Thus, insulin/IGF-1 signaling is important for increased neural processing andsystemic metabolism, and could be a specific target for therapeutic strategies to decreasealterations associated with age-related cognitive decline. | Genaro G Ortiz Miguel Huerta Héctor A González-Usigli Erandis D Torres-Sánchez Daniela LC Delgado-Lara Fermín P Pacheco-Moisés Mario A Mireles-Ramírez Blanca MG Torres-Mendoza Roxana I Moreno-Cih Irma E Velázquez-Brizuela | 2022 | World Journal of Diabetes2022，13，4： | 2 |
| 6 | Business Model Innovation through Trial- and- Error Learning: The Naturhouse Case 显示文摘 | SOSNA M TREVINYORODNGUEZ R N VEL AMURI S R | 2010 | Long Range Planning2010，43，23： | 1 |
| 7 | Two-dimensional optimization of material composition of functionally graded materials using meshless analysis and a genetic algorithm显示文摘 | ANDREW G J VEL S S | 2006 | Comput Methods in Applied Meeh & Eng2006，195，44： | 1 |
| 8 | Detection of bolt load loss in hybrid composite/metal bolted connections显示文摘 | Richard Mewer Senthil S Vel | 2004 | Engineering Structures2004，26，： | 1 |
| 9 | Three-dimensional analytical solution for hybrid multiplayered piezoelectric plates显示文摘 | Vel S S Batra R C | 2000 | J Appl Mech2000，67，3： | 1 |
| 10 | Design,synthesis,and evaluation of oxygen-containing macrocyclic peptidomimetics as inhibitors of HCV NS3 protease显示文摘 | Velázquez F Venkatraman S Blackman M | | 0，，03： | 1 |
| 11 | L-2-hydroxyglutaric aciduria in a patient with Klinefelter syndrome显示文摘 | Pascual-Castroviejo I Pascual-Pascual S I Velázquez Fragua R | 2005 | Neurologia2005，20，： | 1 |
| 12 | Similarity of the Cinl repetitive family of Zea mays to eukaryotic transposable elements显示文摘 | Shepherd N S Schwarz-Sommer Z Blumberg vel Spalve J et a1 | 1984 | Nature1984，307，5947： | 1 |
| 13 | Virus-induced gene silencing (VIGS) in Nicotiana benthamiana and tomato显示文摘 | VEL(A)SQUEZ A CHAKRAVARTHY S MARTIN G | | 0，，： | 1 |
| 14 | Generalized plane strain thermopiezoelectric analysis of multilayered plates 显示文摘 | Vel Senthil S Batra R C | 2003 | Journal of Thermal Stresses2003，26，4： | 1 |
| 15 | Exact solution for rectangular sandwich plates with embedded piezoelectric shear actuators显示文摘 | VEL S S BATRA R C | 2001 | AIAA Journal2001，39，7： | 1 |
| 16 | 查看详情显示文摘 | J Estèvel C Gross A Weller S Giovanazzi and M K Oberthaler | | 0，，： | 1 |
| 17 | Multiplex detection of four pathogenic retroviruses using molecular beacons显示文摘 | VEL J A MAJITHIA A R MARRAS S A | 1999 | Proc Natl Acad Sci USA1999，96，11： | 1 |
| 18 | Active vibration suppression of sandwich beams using piezoelectric shear actuators: experiments and numerical simulations显示文摘 | Baillargeon B P Vel S S | 2005 | Journal of Intelligent Material Systems and Structures2005，16，6： | 1 |
| 19 | Generalized plane strain thernopiezoelectric analysis of multilayered plates显示文摘 | Vel S S Batra R C | 2003 | Journal of Thermal Stresses2003，26，4： | 1 |
| 20 | HP0953-hypothetical virulence factor overexpresion and localization during Helicobacter pylori infection of gastric epithelium显示文摘BACKGROUND The high prevalence and persistence of Helicobacter pylori(H. pylori) infection, as well as the diversity of pathologies related to it, suggest that the virulence factors used by this microorganism are varied. Moreover, as its proteome contains 340hypothetical proteins, it is important to investigate them to completely understand the mechanisms of its virulence and survival. We have previously reported that the hypothetical protein HP0953 is overexpressed during the first hours of adhesion to inert surfaces, under stress conditions, suggesting its role in the environmental survival of this bacterium and perhaps as a virulence factor.AIM To investigate the expression and localization of HP0953 during adhesion to an inert surface and against gastric(AGS) cells.METHODS Expression analysis was performed for HP0953 during H. pylori adhesion. HP0953 expression at 0,3, 12, 24, and 48 h was evaluated and compared using the Kruskal-Wallis equality-of-populations rank test. Recombinant protein was produced and used to obtain polyclonal antibodies for immunolocalization. Immunogold technique was performed on bacterial sections during adherence to inert surfaces and AGS cells, which was analyzed by transmission electron microscopy. HP0953 protein sequence was analyzed to predict the presence of a signal peptide and transmembrane helices, both provided by the ExPASy platform, and using the GLYCOPP platform for glycosylation sites. Different programs, via, I-TASSER, RaptorX, and HHalign-Kbest, were used to perform three-dimensional modeling.RESULTS HP0953 exhibited its maximum expression at 12 h of infection in gastric epithelium cells.Immunogold technique revealed HP0953 localization in the cytoplasm and accumulation in some peripheral areas of the bacterial body, with greater expression when it is close to AGS cells.Bioinformatics analysis revealed the presence of a signal peptide that interacts with the transmembrane region and then allows the release of the protein to the external environment. The programs also showed a similarity with the Tip-alpha protein of H. pylori. Tip-alpha is an exotoxin that penetrates cells and induces tumor necrosis factor alpha production, and HP0953 could have a similar function as posttranslational modification sites were found;modifications in turn require enzymes located in eukaryotic cells. Thus, to be functional, HP0953 may necessarily need to be translocated inside the cell where it can trigger different mechanisms producing cellular damage.CONCLUSION The location of HP0953 around infected cells, the probable posttranslational modifications, and its similarity to an exotoxin suggest that this protein is a virulence factor. | Nancy K Arteaga-Resendiz Gerardo E Rodea Rosa María Ribas-Aparicio Alma L Olivares-Cervantes Juan Arturo Castelán-Vega Joséde Jesús Olivares-Trejo Sandra Mendoza-Elizalde Edgar O López-Villegas Christian Colín Pamela Aguilar-Rodea Alfonso Reyes-López Marcela Salazar García Norma Velázquez-Guadarrama | 2022 | World Journal of Gastroenterology2022，28，29： | 1 |
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