Xuefei Xiao

Central South University, Ch’ang-sha-shih, Hunan, China

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Publications (7)12.63 Total impact

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    ABSTRACT: Non-alcoholic fatty liver disease (NAFLD) is a common liver disorder poising burgeoning health problem to humans. Recent studies have shown that long non-coding RNA (lncRNA) plays critical roles in a myriad of biological processes and human diseases. Since the roles of lncRNA in NAFLD remain unknown, they were investigated in the study. Microarray expression profiling of mRNAs and lncRNAs was conducted using RNA extracted from patients with and without NAFLD. One thousand seven hundred thirty-five lncRNAs and 1485 mRNA were found differentially expressed in NAFLD samples compared with those in control samples. Among them 535 and 1,200 lncRNAs were upregulated and downregulated in NAFLD, respectively; 760 and 725 mRNAs were upregulated and downregulated in NAFLD, respectively. Moreover, seven lncRNAs and seven mRNAs that were highly up- or downregulated in NAFLD samples were validated by quantitative real-time polymer chain reactions. Kyoto Encyclopedia of Genes and Genomes pathway analysis and Gene Ontology analysis for the differentially expressed mRNAs showed that these RNAs are involved in various metabolic processes, cellular components, and molecular functions. Our findings indicate that the expression profiles of lncRNAs have changed in NAFLD as compared with normal liver, and the identified regulated RNAs may provide novel insight into the molecular mechanisms underlying the disease and potential novel diagnostic or therapeutic targets for NAFLD. © 2015 IUBMB Life, 2015.
    No preview · Article · Oct 2015 · International Union of Biochemistry and Molecular Biology Life
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    ABSTRACT: Traumatic hemorrhagic shock (HS) is a severe outcome of traumatic injury that accounts for numerous traumatic deaths. In the process of traumatic HS, both hemorrhage and trauma can trigger a complex cascade of posttraumatic events that are related to inflammatory and immune responses, which may lead to multiple organ injury or even death. From a mechanistic perspective, systemic inflammation and organ injury are involved coagulation, the complement system, impaired microcirculation and inflammatory signaling pathways. In this review, we discuss the systemic inflammation and multiple organ injury in post-traumatic HS.
    No preview · Article · May 2015 · Frontiers in Bioscience
  • Min Gao · Yu Jiang · Xuefei Xiao · Yue Peng · Xianzhong Xiao · Mingshi Yang
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    ABSTRACT: Pathogenesis and treatment of inflammatory gut barrier failure is an important problem in critical care. In this study, we examined the role of pioglitazone, an agonist of peroxisome proliferator-activated receptor gamma, in gut barrier failure during experimental peritonitis in rats. Male rats were randomly divided into three groups as follows: sham, sepsis, and sepsis + pioglitazone. Sepsis was achieved by means of the cecal ligation and puncture (CLP). Pioglitazone was administered intraperitoneally (10 mg/kg/d) for 7 d before the experiment. Animals were killed at 24 h or followed 72 h for survival. The tissue level of tumor necrosis factor-α, interleukin-6, superoxide dismutase, malondialdehyde, and myeloperoxidase was measured. Intestinal mucosa injury was assessed histologically. The plasma fluorescein isothiocyanate-dextran, D-lactic acid, and intestinal diamine oxidase were determined to evaluate the permeability and integrity of intestinal mucosal epithelium. Vena cava blood and tissue samples were used to monitor bacterial translocation. Intestinal inflammation, oxidize stress, neutrophil infiltration, morphology injury, and impaired permeability of the small intestine in the CLP group were found more severe than those in the sham group. Application of pioglitazone not only minimized all the indicators of intestinal injury and barrier failure but also improved the survival of septic rats induced by CLP. Our novel findings suggest that pioglitazone could protect against intestinal injury and maintain intestinal barrier integrity and might be a useful strategy to ameliorate intestinal failure in polymicrobial sepsis. Copyright © 2015 Elsevier Inc. All rights reserved.
    No preview · Article · Feb 2015 · Journal of Surgical Research
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    ABSTRACT: Non-alcoholic fatty liver disease (NAFLD) has emerged as a public health issue with a prevalence of 15-30% in Western populations and 6-25% in Asian populations. Certain studies have revealed the alteration of microRNA (miRNA or miR) profiles in NAFLD and it has been suggested that miR-21 is associated with NAFLD. In the present study, we measured the serum levels of miR-21 in patients with NAFLD and also performed in vitro experiments using a cellular model of NAFLD to further investigate the effects of miR-21 on triglyceride and cholesterol metabolism. Furthermore, a novel target through which miR-21 exerts its effects on NAFLD was identified. The results revealed that the serum levels of miR-21 were lower in patients with NAFLD compared with the healthy controls. In addition, 3-hydroxy-3-methylglutaryl-co-enzyme A reductase (HMGCR) expression was increased in the serum of patients with NAFLD both at the mRNA and protein level. To mimic the NAFLD condition in vitro, HepG2 cells were treated with palmitic acid (PA) and oleic acid (OA). Consistent with the results obtained in the in vivo experiments, the expression levels of miR-21 were decreased and those of HMGCR were increased in the in vitro model of NAFLD. Luciferase reporter assay revealed that HMGCR was a direct target of miR-21 and that miR-21 exerted an effect on both HMGCR transcript degradation and protein translation. Furthermore, the results from the in vitro experiments revealed that miR-21 decreased the levels of triglycerides (TG), free cholesterol (FC) and total cholesterol (TC) in the PA/OA-treated HepG2 cells and that this effect was attenuated by HMGCR overexpression. Taken together, to the best of our knowledge, the present study is the first to report that miR-21 regulates triglyceride and cholesterol metabolism in an in vitro model of NAFLD, and that this effect is achieved by the inhibition of HMGCR expression. We speculate that miR-21 may be a useful biomarker for the diagnosis and treatment of NAFLD.
    No preview · Article · Jan 2015 · International Journal of Molecular Medicine
  • Xuefei Xiao · Qiquan Wan · Qifa Ye · Ying Ma · Jiandang Zhou
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    ABSTRACT: Objective: To explore the risk factors for septic shock in patients with solid organ transplantation and complication of bacteremias. Methods: Clinical data of 98 solid organ transplant cases with complication of bacteremias were retrospectively studied. All episodes of bacteremias met the CDC criteria. Six possible risk factors contributing to septic shock were evaluated by univariate analysis and multivariate logistic regression analysis. Results: Among the 98 patients, 133 times of bacteremias have been reported and 39 patients developed septic shock. Among the 39 patients with septic shock, 43.5%, 38.5%, 15.4% and 2.6% of bacteremias were induced by multiple bacteria, gram-negative bacteria, gram-positive bacteria and fungi, respectively. The lung was the main source of bacteremias (41.8%), followed by intraabdominal/ biliary focus (24.5%). Risk factors for developing septic shock included the bacteremias happened in the 2nd to 8th week post transplant (P=0.014), polymicrobial etiology (P=0.001), intra-abdominal/ biliary focus (P=0.011), and liver transplant (P=0.002). Only bacteremias occurred in the 2nd to 8th week post transplant and polymicrobial etiology were significant risk factors by multivariate analysis. Conclusion: Risk factors for developing septic shock in bacteremias after SOT are early-onset (the 2nd-8th week post transplant) and polymicrobial etiology.
    No preview · Article · Oct 2012 · Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences
  • Qiquan Wan · Xuefei Xiao · Qifa Ye · Jiandang Zhou
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    ABSTRACT: Objective: To investigate the possible risk factors for death among liver or kidney recipients with bloodstream infections (BSIs). Methods: A retrospective study of 138 episodes of bloodstream infections documented in 103 patients was conducted to assess potential risk factors for mortality. The risk factors were identified by logistic regression analysis. Results: The mean age of the patients was 12-66 (42.3±12.7) years. The majority of infections were nosocomial (78.6%). The BSIs-related mortality rate was 39.8% (41/103). The following variables were identified as risk factors for BSIs-related mortality by univariate analysis: intraabdominal/ biliary focus (P=0.003), polymicrobial infection (P<0.001), liver transplant (P<0.001), platelet count <50000/mm3 (P<0.001), and septic shock (P<0.001). Platelet count < 50000/mm3 (P=0.002) and septic shock (P<0.001) showed significantly difference between the mortality group and the survival groups in the multivariate logistic regression analysis. Conclusion: Decreased platelet count and septic shock are risk factors for increased
    No preview · Article · Sep 2012 · Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences
  • Xuefei Xiao · Mingshi Yang · Dao Sun · Shenghua Sun
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    ABSTRACT: The present study aimed to investigate the effect of curcumin on sepsis-induced acute lung injury (ALI) in rats, and explore its possible mechanisms. Male Sprague-Dawley rats were randomly divided into the following five experimental groups (n = 20 per group): animals undergoing a sham cecal ligature puncture (CLP) (sham group); animals undergoing CLP (control group); or animals undergoing CLP and treated with vehicle (vehicle group), curcumin at 50 mg/kg (low-dose curcumin [L-Cur] group), or curcumin at 200 mg/kg (high-dose curcumin [H-Cur] group).At 6, 12, 24 h after CLP, blood, bronchoalveolar lavage fluid (BALF) and lung tissue were collected. The lung wet/dry weight (W/D) ratio, protein level, and the number of inflammatory cells in the BALF were determined. Optical microscopy was performed to examine the pathologic changes in lungs. Myeloperoxidase (MPO) activity, malondialdehyde (MDA) content, as well as superoxidase dismutase (SOD) activity were measured in lung tissues. The expression of inflammatory cytokines, tumor necrosis factor-alpha (TNF-α), interluekin-8 (IL-8), and macrophage migration inhibitory factor (MIF) were determined in the BALF. Survival rates were recorded at 72 h in the five groups in another experiment. Treatment with curcumin significantly attenuated the CLP-induced pulmonary edema and inflammation, as it significantly decreased lung W/D ratio, protein concentration, and the accumulation of the inflammatory cells in the BALF, as well as pulmonary MPO activity. This was supported by the histopathologic examination, which revealed marked attenuation of CLP-induced ALI in curcumin treated rats. In addition, curcumin significantly increased SOD activity with significant decrease in MDA content in the lung. Also, curcumin caused down-regulation of the inflammatory cytokines TNF-α, IL-8, and MIF levels in the lung. Importantly, curcumin improved the survival rate of rats by 40%-50% with CLP-induced ALI. Taken together, these results demonstrate the protective effects of curcumin against the CLP-induced ALI. This effect can be attributed to curcumin ability to counteract the inflammatory cells infiltration and, hence, ROS generation and regulate cytokine effects.
    No preview · Article · Dec 2011 · Journal of Surgical Research