Xu X.,Peking University |
Xu X.,Inner Mongolia Medical College |
Xu X.,Affiliated Hospital of Inner Monglia Medical College |
Liu B.,University of Science and Technology Beijing |
And 4 more authors.
Journal of Cellular Biochemistry | Year: 2014
Homo sapiens longevity assurance homolog 2 of yeast LAG1 (LASS2), also known as tumor metastasis suppressor gene 1 (TMSG1), was firstly cloned by our laboratory in 1999. However, its antitumor molecular mechanisms are still unclear. LASS2/TMSG-1 could directly interact with the C subunit of Vacuolar H+ ATPase (V-ATPase), which suggested that LASS2/TMSG1 might inhibit the invasion and metastasis through regulating the function of V-ATPase. In this study, we explored the effect of small hairpin RNA (shRNA) targeting LASS2/TMSG1 on the invasion and metastasis of human prostate carcinoma cell line PC-3M-2B4 with low metastatic potential and its functional interaction with V-ATPase. Silencing of LASS2/TMSG1 gene in PC-3M-2B4 cells increased V-ATPase activity, extracellular hydrogen ion concentration and in turn the activation of secreted MMP-2 and MMP-9, which coincided with enhancing cell proliferation, cell survival, and cell invasion in vitro, as well as acceleration of prostate cancer (PCA) growth and lymph node metastases in vivo. Thus we concluded that silencing of LASS2/TMSG1 enhances invasion and metastasis of PCA cell through increase of V-ATPase activity. These results establish LASS2/TMSG1 as a promising therapeutic target for advanced PCA. J. Cell. Biochem. 115: 731-743, 2014. © 2013 Wiley Periodicals, Inc. © 2013 Wiley Periodicals, Inc.
Long-term efficacy of transcatheter closure of ventricular septal defect in combination with percutaneous coronary intervention in patients with ventricular septal defect complicating acute myocardial infarction: A multicentre study
Zhu X.-Y.,Shenyang Northern Hospital |
Qin Y.-W.,Changhai Hospital |
Han Y.-L.,Shenyang Northern Hospital |
Zhang D.-Z.,Shenyang Northern Hospital |
And 7 more authors.
EuroIntervention | Year: 2013
Aims: To assess the immediate and long-term outcomes of transcatheter closure of ventricular septal defect (VSD) in combination with percutaneous coronary intervention (PCI) in patients with VSD complicating acute myocardial infarction (AMI). Methods and results: Data were prospectively collected from 35 AMI patients who underwent attempted transcatheter VSD closure and PCI therapy in five high-volume heart centres. All the patients who survived the procedures were followed up by chest x-ray, electrocardiogram and echocardiography. Thirteen patients underwent urgent VSD closure in the acute phase (within two weeks from VSD) while the others underwent elective closure at a median of 23 days from VSD occurrence. The percentage of VSD closure device success was 92.3% (36/39) and procedure success was 91.4% (32/35). The incidence of in-hospital mortality was 14.3% (5/35). At a median of 53 months follow-up, only two patients died at 38 and 41 months, respectively, and other patients' cardiac function tested by echocardiography improved significantly compared to that evaluated before discharge. Conclusion: The combination of transcatheter VSD closure and PCI for treating VSD complicating AMI is safe and feasible and is a promising alternative to surgery in patients with anatomically suitable VSD and coronary lesion.
Zhu S.,Yantai Yuhuangding Hospital |
Sun P.,Yantai Yuhuangding Hospital |
Zhang Y.,The Peoples Hospital of Liaocheng City |
Yan L.,Qingdao Central Hospital |
Luo B.,Qingdao University
Experimental and Therapeutic Medicine | Year: 2013
The aim of this study was to detect the expression of proliferatng cell nuclear antigen (PCNA) and c-myc in Epstein-Barr virus (EBV)-associated gastric carcinoma (EBVaGC) and EBV-negative gastric carcinoma (EBVnGC), as well as the expression of EBV-encoded proteins in EBVaGC and their effect on carcinogenesis and the development of gastric cancer. The PCNA and c-myc protein levels were assessed by immunohistochemistry in 13 EBVaGC and 45 EBVnGC specimens. The expression of related genes of EBV, including EB nuclear antigen (NA)-1 and EBNA2 genes, latent membrane protein 1 (LMP1) and early genes BARF1 and BHRF1 were tested by reverse transcription-polymerase chain reaction (RT-PCR) and southern blotting. The PCNA labeling index (LI) of EBVaGCs, EBVnGCs and the corresponding adjacent tissues of EBVaGCs were 49.3768±12.1832, 14.839±7.1847, 35.613±8.3831 and 24.2735±10.1332, respectively. The PCNA LI was significantly different between EBVaGC and EBVnGC of EBVaGC (t=4.686, P<0.01). The difference between EBVaGC and corresponding adjacent tissues of EBVaGC was also significant (t=8.805, P<0.01). The expression of c-myc protein was detected in 33 of 58 (55.39%) gastric carcinomas and in 21 of 58 (36.21%) adjacent tissues. There was a significant difference between the two groups (χ2=4.989, P<0.05). The expression of the c-myc protein was detected in 8 of 13 (61.54%) EBVaGCs and in 25 of 45 (55.56%) EBVnGCs. The difference between the two groups was not significant (χ2=0.147, P>0.05). EBNA1 mRNA was detected in all 13 EBVaGC cases, while EBNA2 and LMP1 mRNA was not detected in these cases. Of the 13 EBV-positive samples, 6 exhibited BARF1 transcripts and 2 exhibited BHRF1 transcripts. c-myc expression did not correlate with the presence of EBV in EBVaGC. EBV infection may induce PCNA expression. The lack of EBNA2 and LMP1 protein expression in EBVaGC suggests that EBNA2 and LMP1 do not correlate with cell apoptosis and c-myc expression. Early genes BARF1 and BHRF1 may play an important role in the development and progression of gastric carcinomas by immortalizing epithelial cells.
Yin G.,Qingdao Central Hospital
Zhonghua lao dong wei sheng zhi ye bing za zhi = Zhonghua laodong weisheng zhiyebing zazhi = Chinese journal of industrial hygiene and occupational diseases | Year: 2012
To explore the effects of Candesartan cilexetil on the rats exposed to silica. Ninety-six wistar rats were randomly divided into model-group, intervention-group and control-group (32 rats a group). The intervention-group, model-group and control group were orally exposed to Candesartan cilexetil (10 mg/kg) and normal solution for a week, respectively. Then the model and intervention groups were exposed to silica by intratracheal infusion of silica dust suspension (50 mg/ml), the control group was exposed to 0.5 ml normal solution for 2 days. On the 3rd, 7th, 14th and 28th days after exposure to silica, 8 rats of each group were sacrificed, respectively. The samples of lung tissues were collected. The lung/body coefficients were detected. The pathological examinations were performed by HE and Masson staining. The levels of ACE in the lung tissues were observed by immunochemistry staining. The levels of TGF-β1 and Ang II in the BALF were examined by ELISA. On the 3rd, 7th, 14th and 28th days after exposure, the levels of alveolitis and pulmonary fibrosis in the intervention group were significantly alleviated as compared with model group, and the lung/body coefficients in the intervention group, which were significantly lower than those in model group respectively (P < 0.01). As compared with control group, the levels of TGF-β1 and Ang II of the BALF in the model and intervention groups significantly enhanced (P < 0.01). As compared with model group, the levels of TGF-β1 and Ang II of the BALF in the intervention group significantly decreased (P < 0.01). As compared with control group, the levels of ACE of the lung tissues in the model and intervention groups significantly increased (P < 0.01). But the level of ACE of the lung tissues in the intervention group was significantly lower than that in the model group (P < 0.01). The early Candesartan cilexetil intervention could significantly decrease the levels of alveolitis and lung fibrosis, declined the levels of TGF-β(1) and Ang II of BALF and downregulated the expression level of ACE in lung tissues in rats exposed to silica.
Jiang M.,Qingdao Central Hospital
Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery | Year: 2012
To investigate the method and effectiveness of repairing sacrococcygeal pressure sores with modified upper gluteal rhomboid fasciocutaneous flap. Between January 2004 and March 2011, 43 patients with sacrococcygeal pressure sores were treated. There were 25 males and 18 females with an average age of 63 years (range, 38-95 years). The disease duration was 3 months to 2 years and 6 months (mean, 8.5 months). The size of pressure sores ranged from 6 cm x 5 cm to 18 cm x 13 cm. According to the extent and lesion degree of pressure scores, 23 pressure sores were rated as degree III and 20 pressure sores as degree IV. The modified upper gluteal rhomboid flap was designed, one-side upper gluteal fasciocutaneous flaps were transplanted to repair sacrococcygeal pressure sores in 19 cases and two-side flaps in 24 cases. The size of one side flap ranged from 6.5 cm x 4.5 cm to 18.0 cm x 11.5 cm. Fluid under flap occurred in 1 case and edge necrosis of the flaps in 3 cases at 7 days after operation, which were cured after drainage and dressing change; the other flaps survived, and incisions healed by first intention. All patients were followed up 6 months to 3 years with an average of 11 months. Two patients relapsed at 5 months and 8 months, respectively; the other patients had no recurrence. The color of the flaps was normal, and the appearance and elasticity of the flaps were good. The modified upper gluteal rhomboid fasciocutaneous flap has the advantages of simple design and operation, less injury, and reliable effect in repairing sacrococcygeal pressure sores.
Yang X.,Qingdao Municipal Hospital |
Feng L.,Qingdao Municipal Hospital |
Li C.,Qingdao Central Hospital |
Li Y.,Zibo Municipal Hospital Authorities
Journal of Pharmacological Sciences | Year: 2014
We investigated the effects of treatment with tranilast on vascular and metabolic dysfunction induced by a high-fat emulsion intragastric administration. Wistar rats were randomized to receive water or high-fat emulsion with or without tranilast treatment (400 mg/kg per day) for 4 weeks. Insulin sensitivity was determined with a hyperinsulinemic-euglycemic clamp experiment and short insulin tolerance test. Vascular reactivity was evaluated using aortic rings in organ chambers. Glutathione peroxidase 1 (GPX1) expressions, eNOS phosphorylation and activity, MCP-1, H2O 2 formation, and NO production were determined in vascular or soleus tissues. Tranilast treatment was found to prevent alterations in vascular reactivity and insulin sensitivity and to prevent increases in plasma glucose and insulin noted in the high-fat emulsion-treated rats. These were associated with increased antioxidant enzyme GPX1 expression, eNOS phosphorylation and activity, and NO production, but reductions in H2O2 accumulation. Moreover, tranilast preserved GPX1 expression in palmitic acid (PA)-treated endothelial cells with a consequent decreased ROS formation and increased eNOS phosphorylation and NO production. Therefore, oxidative stress induced by a relatively short-term high-fat diet could cause the early development of vascular and metabolic abnormalities in rats, and tranilast has a beneficial effect in vascular dysfunctions and insulin resistance via preserving GPX1 and alleviating oxidative stress. © The Japanese Pharmacological Society.
Zhang H.,Qingdao Central Hospital |
Yin G.,Qingdao Central Hospital |
Jiang H.,Qingdao Central Hospital |
Zhang C.,Qingdao Central Hospital
Journal of International Medical Research | Year: 2013
Objective: To study the potential of high-dose N-acetylcysteine (NAC) to attenuate silicainduced pulmonary fibrosis in the rat. Methods: Rats exposed to intratracheal instillation of silica particles were treated with 500 mg/kg NAC orally every day for 7 days, before and up to 28 days after silica administration (n = 32), or received no treatment following silica exposure (n = 32); a third group received intratracheal saline (n = 32). Fibrosis score, and hydroxyproline (HYP) and malondialdehyde (MDA) content, were assessed in lung tissue. Bronchoalveolar lavage fluid (BALF) and serum levels of tumour necrosis factor (TNF)-α, interleukin (IL)-8 and high-sensitivity C-reactive protein (hsCRP) were assessed by enzyme-linked immunosorbent assay. Results: Histopathology revealed inflammation and fibrosis in lung tissue from rats exposed to silica, but not in saline controls. The fibrosis score was significantly lower in animals treated with NAC compared with silica-exposed untreated rats. HYP and MDA content were significantly lower at all timepoints, following NAC treatment versus no treatment, in silica-exposed rats. NAC attenuated silica-induced increases in TNF-α, IL-8 and hsCRP in BALF and serum. Conclusions: Oral treatment with high-dose NAC during early silica exposure can ameliorate the activity of proinflammatory cytokines, thus attenuating subsequent lung fibrosis. These results suggest that NAC has potential as a treatment for silica-induced lung fibrosis. © The Author(s) 2013.
Shou-Shi W.,Qingdao University |
Ting-Ting S.,Qingdao Central Hospital |
Ji-Shun N.,Qingdao Central Hospital |
Hai-Chen C.,Qingdao University
Renal Failure | Year: 2015
Purpose: Oxidative renal injury is the mainstay in patients with spinal cord injury (SCI) and it may eventuate to chronic renal failure. In our study, we investigated the potential of α2-adrenoreceptor agonist Dexmedetomidine (Dex) in ameliorating SCI provoked oxidative renal assault. Methods: Complete SCI was generated by surgical transaction of the cord at the T10-12 level. Dex administration (50 mcg/kg, b.wt, intraperitoneally) was initiated 12 h after the surgery for 10 days. Then, blood was collected and kidneys were removed to evaluate the efficacy of Dex on post-SCI renal complications. Results: Dex treatment significantly attenuated elevated serum creatinine and blood urea nitrogen in SCI rats to normalcy. Further in SCI rats elevated level of MDA, protein carbonyl and myeloperoxidase (MPO) were observed and Dex treatment significantly attenuated these toxic manifestations to normalcy. Besides in SCI rats, the antioxidants (SOD, CAT, Gpx and GST and GSH) levels were significantly diminished and Dex treated rats significantly restored the antioxidants level in renal tissue to normalcy. Notably, in our study the protein expression of inflammatory cytokines (TNF-α and IL-6) and cleaved caspase-3 were upregulated in renal tissue of SCI rats. Fascinatingly, Dex treatment downregulated the protein expression of TNF-α, IL-6 and cleaved caspase-3 by anti-inflammatory, antiapoptotic mechanism. Furthermore, SCI rats displayed upregulated protein expression of kidney of SCI rats. Dex treatment diminished the renal apoptosis by downregulating the cleaved caspase-3 expression. Conclusion: Taken together, these results accentuate that Dex may be a beneficial clinical agent to combat post-SCI renal complications. © 2015 Informa Healthcare USA, Inc.
Xuan Y.,Qingdao Municipal Hospital |
Lei F.,Qingdao Municipal Hospital |
Changjiang L.,Qingdao Central Hospital |
Yu L.,Zibo Municipal Hospital Authorities Internal Medicine
Gene | Year: 2014
Aim: To investigate the association between interleukin-6 (IL-6) - 174G. >. C and - 572C. >. G polymorphisms and risk for ischemic stroke (IS) in young patients. Methods: We genotyped IL-6. - 174G. >. C and - 572C. >. G in a case-control study of 430 young IS patients and 461 control subjects. An unconditional multiple logistical regression model was used to calculate the effects of IL-6. - 174G. >. C and - 572C. >. G polymorphisms on IS risk. Results: Higher body mass index, diabetes, hypertension, obesity, and smoking were associated with risk of ischemic stroke. Multivariate regression analyses showed that subjects carrying the - 174CC genotype (OR. = 1.69, 95% CI. = 1.16-2.57) and C allele (OR. = 1.37, 95% CI. = 1.09-1.67) had a small but significant increased risk of IS. Similarly, those carrying the - 572GG genotype (OR. = 2.12, 95% CI. = 1.18-3.82) and G allele (OR. = 1.43, 95% CI. = 1.14-1.83) had a moderate increased risk of IS. We found the - 174G. >. C and - 572C. >. G polymorphisms interact with hypertension and obesity. Conclusion: Our results suggest that polymorphisms in IL-6. - 174G. >. C and - 572C. >. G are associated with IS risk in young patients, and that these polymorphisms interact with hypertension, obesity and etiologic subtypes. These findings could be helpful in identifying individuals at increased risk for developing IS. © 2014 Elsevier B.V.
PubMed | Qingdao Central Hospital and Shandong University
Type: Journal Article | Journal: The international journal of occupational and environmental medicine | Year: 2017
A 69-year-old woman was admitted to hospital 4 times from November 2007 to June 2009. The patient had silicosis complicated by broncholithiasis, esophagobronchial fistula, and relapsed tuberculosis. She had worked as a stone crusher for 3 years and was exposed to a large amount of quartz dust. Barium esophagography, gastroesophageal endoscopy, and biopsy suggested esophageal-related chronic inflammation and ulcer, which probably caused the repeated esophagobronchial fistulas observed. Bronchoscopy revealed a free broncholithiasis in the left main bronchus. The patient was readmitted a fourth time, for the relapse of silicotuberculosis. After 9 months of antituberculous therapy, she was doing well until the recent last follow-up visit.