201
|
Chen Y, Nie H, Tian L, Tong L, Deng J, Zhang Y, Dong H, Xiong L. Sevoflurane preconditioning-induced neuroprotection is associated with Akt activation via carboxy-terminal modulator protein inhibition. Br J Anaesth 2014; 114:327-35. [PMID: 25182017 DOI: 10.1093/bja/aeu271] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Sevoflurane preconditioning has a neuroprotective effect, but the underlying mechanism is not fully understood. The aim of the present investigation was to evaluate whether sevoflurane-induced cerebral preconditioning involves inhibition of carboxy-terminal modulator protein (CTMP), an endogenous inhibitor of Akt, in a rat model of focal cerebral ischaemia. METHODS Male Sprague-Dawley rats were exposed to 2.7% sevoflurane for 45 min. One hour later, rats were subjected to 60 min of focal cerebral ischaemia. The phosphoinositide 3-kinase inhibitors wortmannin and LY294002 were administered 10 min before preconditioning. Rats in the lentiviral transduction group received an intracerebroventricular injection of lentiviral vector Ubi-MCS-CTMP 3 days before ischaemia. Neurological deficits and infarct volumes were evaluated 24 h and 7 days after reperfusion. Phosphorylation of Akt, glycogen synthase kinase-3β (GSK3β), and expression of CTMP were determined at 1, 3, 12, and 24 h after reperfusion. Akt activity was measured at 3 h after reperfusion. RESULTS Sevoflurane preconditioning improved neurological score and reduced infarct size at 24 h of reperfusion. Pretreatment with wortmannin or LY294002 attenuated these neuroprotective effects. Expression of CTMP correlated with reduced Akt activity after ischaemia, while sevoflurane preconditioning preserved Akt activity and increased phosphorylation of GSK3β. CTMP over-expression diminished the beneficial effects of sevoflurane preconditioning. CONCLUSIONS Activation of Akt signalling via inhibition of CTMP is involved in the mechanism of neuroprotection provided by sevoflurane preconditioning.
Collapse
Affiliation(s)
- Y Chen
- Department of Anaesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - H Nie
- Department of Anaesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - L Tian
- Department of Anaesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - L Tong
- Department of Anaesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - J Deng
- Department of Anaesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - Y Zhang
- Department of Orthopaedics, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - H Dong
- Department of Anaesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| | - L Xiong
- Department of Anaesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, China
| |
Collapse
|
202
|
Dong H, Xie L, Tang C, Chen S, Liu Q, Zhang Q, Zheng W, Zheng Z, Zhang H. Snail1 correlates with patient outcomes in E-cadherin-preserved gastroesophageal junction adenocarcinoma. Clin Transl Oncol 2014; 16:783-91. [PMID: 24356933 DOI: 10.1007/s12094-013-1149-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2013] [Accepted: 12/02/2013] [Indexed: 02/05/2023]
Abstract
PURPOSE The poor prognosis of gastroesophageal junction (GEJ) adenocarcinoma is largely associated with metastasis. We here report the first study to investigate the expression of epithelial-mesenchymal transition (EMT) markers Snail1 and E-cadherin in GEJ adenocarcinoma. METHODS Snail1 and E-cadherin were detected by immunohistochemistry in a cohort of 128 patients with surgically resected GEJ adenocarcinoma. We assessed the pathologic and prognostic relevance in all patients and within clinically different preserved E-cadherin and reduced E-cadherin-expressing sub-groups. RESULTS Immunoreactivity for Snail1 and E-cadherin was positive in 68 and 43 % of tumors, respectively. Snail1-positive tumors had more frequent lymph node metastasis and advanced tumor stage. E-cadherin expression was highly associated with histological differentiation, tumor size, advanced stage, presence of lymph node metastasis and distant metastasis. Patients with positive E-cadherin expression or negative Snail1 expression had significantly favorable overall survival rate. In E-cadherin-preserved tumors, the expression of Snail1 was related to lymph node metastasis, advanced stage and poor patient outcome. However, Snail1 expression had no statistically significant relationship with clinicopathologic parameters or prognosis in the reduced E-cadherin-expressing sub-group. Multivariate survival analysis identified that tumor stage [hazard ratio (HR) 2.440; 95 % confidence interval (CI) 1.216-4.896; P = 0.012], lymph node metastasis (HR 2.404; 95 % CI 1.188-4.867; P = 0.015) and gender (HR 3.244; 95 % CI 1.568-6.714; P = 0.002) were independent prognostic markers for overall survival. CONCLUSIONS Snail1 may act more critically in E-cadherin-positive tumors. Evaluation of Snail1 and E-cadherin in GEJ adenocarcinoma may help in assessing malignant properties and stratifying patients.
Collapse
Affiliation(s)
- H Dong
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | | | | | | | | | | | | | | | | |
Collapse
|
203
|
Benson A, Bendell J, Wainberg Z, Vyushkov D, Acs P, Kudrik F, Dong H, Thai D. A Phase 2 Randomized, Double-Blind, Placebo Controlled Study of Simtuzumab or Placebo in Combination with Gemcitabine for the First Line Treatment of Pancreatic Adenocarcinoma. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu334.4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
|
204
|
Tan L, Cheng L, Yan W, Zhang J, Xu B, Diwan V, Dong H, Palm L, Wu Y, Long L, Tian Y, Nie S. Using daily syndrome-specific absence data for early detection of school outbreaks: a pilot study in rural China. Public Health 2014; 128:792-8. [DOI: 10.1016/j.puhe.2014.06.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Revised: 01/30/2013] [Accepted: 06/03/2014] [Indexed: 11/25/2022]
|
205
|
Park S, Dong H, Zhao W, Grams M, Liu X, Harrington S, Furutani K, Krco C, Olivier K, Markovic S, Kwon E. PD-1 Blockade Enhances Radiation Therapy-Induced Abscopal Effect. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
206
|
Chen X, Wu Y, Dong H, Zhang CY, Zhang Y. Platinum-based agents for individualized cancer treatment. Curr Mol Med 2014; 13:1603-12. [PMID: 24206132 DOI: 10.2174/1566524013666131111125515] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 04/23/2012] [Accepted: 09/10/2013] [Indexed: 11/22/2022]
Abstract
Platinum-based agents are important drugs or drug candidates for cancer chemotherapy. Traditional platinum drugs including the globally approved cisplatin, carboplatin and oxaliplatin are neutral platinum (II) complexes with two amine ligands and two additional ligands that can be aquated for further binding with DNA. The platinum-DNA adducts can impede cellular process and lead to cellular apoptosis. Tumor resistance to platinum drugs has become a very challenging problem to overcome. Individualized cancer treatment using different strategies to circumvent the platinum-drug resistance in cancer patients is of great importance. Structural modification of traditional platinum drugs, combination therapy using platinum drugs with other agents and improved delivery of platinum drug to tumor sites are major strategies developed to overcome existed problems in chemotherapy using traditional platinum drugs. Platinum-based agents with respect to their structure, mechanism of action and strategies developed for improved efficacy in cancer treatment have been summarized in this paper with the perspective of developing new platinum drugs or platinum-based therapy for individualized cancer treatment.
Collapse
Affiliation(s)
- X Chen
- School of Chemistry and Chemical Engineering, Key Lab of Analytical Chemistry for Life Science, Ministry of Education of China, Nanjing University, 22 Hankou Road, Nanjing 210093, China.
| | | | | | | | | |
Collapse
|
207
|
Li Y, Li S, Qin X, Hou W, Dong H, Yao L, Xiong L. The pleiotropic roles of sphingolipid signaling in autophagy. Cell Death Dis 2014; 5:e1245. [PMID: 24853423 PMCID: PMC4047895 DOI: 10.1038/cddis.2014.215] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Revised: 04/10/2014] [Accepted: 04/15/2014] [Indexed: 12/11/2022]
Abstract
The autophagic process involves encompassing damaged proteins and organelles within double- or multi-membraned structures and delivering these molecules to the lytic compartments of vacuoles. Sphingolipids (SLs), which are ubiquitous membrane lipids in eukaryotes, participate in the generation of various membrane structures, including rafts, caveolae, and cytosolic vesicles. SLs are a complex family of molecules that have a growing number of members, including ceramide, sphingosine-1-phosphate, and dihydroceramide, which have been associated with the essential cellular process of autophagy. This review highlights recent studies focusing on the regulation and function of SL-associated autophagy and its role in cell fate, diseases, and therapeutic interventions.
Collapse
Affiliation(s)
- Y Li
- 1] The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, The Fourth Military Medical University, Xi'an 710032, China [2] Department of Anesthesiology, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, China
| | - S Li
- 1] The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, The Fourth Military Medical University, Xi'an 710032, China [2] Department of Oral Biology, Stomatology School, The Fourth Military Medical University, Xi'an 710032, China
| | - X Qin
- Department of Chemistry, Pharmacy School, The Fourth Military Medical University, Xi'an 710032, China
| | - W Hou
- Department of Anesthesiology, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, China
| | - H Dong
- Department of Anesthesiology, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, China
| | - L Yao
- The State Key Laboratory of Cancer Biology, Department of Biochemistry and Molecular Biology, The Fourth Military Medical University, Xi'an 710032, China
| | - L Xiong
- Department of Anesthesiology, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, China
| |
Collapse
|
208
|
Jiao W, Wan K, Song W, Yin Q, Lian L, Li Q, Tian J, Huang H, Dong H, Dong F, Zhao X, Han R, Liu Z, Shen AD. Spoligotype and drug resistance characteristics of M. tuberculosis isolates from children in China. Int J Infect Dis 2014. [DOI: 10.1016/j.ijid.2014.03.1052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
209
|
Wang D, Zhang M, Bian H, Dong H, Xu W, Xu X, Zhu Y, Liu F, Geng Z, Zhou G, Wang P. Proteolysis and cathepsin activities in the processing of dry-cured duck. Poult Sci 2014; 93:687-94. [DOI: 10.3382/ps.2013-03335] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
210
|
Xia WF, Ma XP, Li XR, Dong H, Yi JL. Association study of c.910A>G and c.1686C>G polymorphisms in XRCC1 gene with risk of hepatocellular carcinoma in the Chinese population. Genet Mol Res 2014; 13:1314-22. [PMID: 24634229 DOI: 10.4238/2014.february.28.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
XRCC1 (human X-ray repair complementing defective repair in Chinese hamster cell 1) gene is considered a potentially important gene influencing the risk of hepatocellular carcinoma (HCC). Our analyses detected two allelic variants of XRCC1, c.910A>G and c.1686C>G. We aimed to investigate whether these polymorphisms influence the risk of HCC. The association between the XRCC1 polymorphisms and the risk of HCC was analyzed in 719 patients and 662 controls by polymerase chain reaction-restriction fragment length polymorphism. Our data suggested that the genotypes and alleles of c.910A>G and c.1686C>G polymorphisms were statistically associated with the risk of HCC. For c.910A>G, the GG genotype was associated with increased risk of developing HCC compared with the AA wild genotype (OR = 1.95, 95%CI = 1.40-2.70, P < 0.0001). For c.1686C>G, the risk of HCC was significantly higher for the GG genotype compared with the CC wild genotype (OR = 1.89, 95%CI = 1.375-2.599, P < 0.0001). Significant differences in the risk of HCC were also found with other genetic models for these two SNPs. The G allele of both c.910A>G and c.1686C>G may contribute to the risk of HCC (G versus A: OR = 1.40, 95%CI = 1.20-1.64, P < 0.0001 and G versus C: OR = 1.38, 95%CI = 1.19-1.61, P < 0.0001, respectively). Our findings suggest that the c.910A>G and c.1686C>G polymorphisms of XRCC1 are associated with the risk of HCC in the Chinese population.
Collapse
Affiliation(s)
- W F Xia
- Department of General Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - X P Ma
- Department of Thyroid and Breast Surgery, Affiliated Provincial Hospital of Anhui Medical University, Hefei, Anhui Province, China
| | - X R Li
- Department of General Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - H Dong
- Department of General Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| | - J L Yi
- Department of General Surgery, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan, Hubei Province, China
| |
Collapse
|
211
|
Feng Y, Ke C, Tang Q, Dong H, Zheng X, Lin W, Ke J, Huang J, Yeung SCJ, Zhang H. Metformin promotes autophagy and apoptosis in esophageal squamous cell carcinoma by downregulating Stat3 signaling. Cell Death Dis 2014; 5:e1088. [PMID: 24577086 PMCID: PMC3944271 DOI: 10.1038/cddis.2014.59] [Citation(s) in RCA: 195] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 12/31/2013] [Accepted: 01/22/2014] [Indexed: 02/05/2023]
Abstract
The antidiabetic drug metformin exerts chemopreventive and antineoplastic effects in many types of malignancies. However, the mechanisms responsible for metformin actions appear diverse and may differ in different types of cancer. Understanding the molecular and cellular mechanisms specific for different cancers is important to optimize strategy for metformin treatment in different cancer types. Here, we investigate the in vitro and in vivo effects of metformin on esophageal squamous cell carcinoma (ESCC) cells. Metformin selectively inhibited cell growth in ESCC tumor cells but not immortalized noncancerous esophageal epithelial cells. In addition to apoptosis, metformin triggered autophagy. Pharmacological or genetic inhibition of autophagy sensitized ESCC cells to metformin-induced apoptotic cell death. Mechanistically, signal transducer and activator of transcription 3 (Stat3) and its downstream target Bcl-2 was inactivated by metformin treatment. Accordingly, small interfering RNA (siRNA)-mediated Stat3 knockdown enhanced metformin-induced autophagy and apoptosis, and concomitantly enhanced the inhibitory effect of metformin on cell viability. Similarly, the Bcl-2 proto-oncogene, an inhibitor of both apoptosis and autophagy, was repressed by metformin. Ectopic expression of Bcl-2 protected cells from metformin-mediated autophagy and apoptosis. In vivo, metformin downregulated Stat3 activity and Bcl-2 expression, induced apoptosis and autophagy, and inhibited tumor growth. Together, inactivation of Stat3-Bcl-2 pathway contributes to metformin-induced growth inhibition of ESCC by facilitating crosstalk between apoptosis and autophagy.
Collapse
Affiliation(s)
- Y Feng
- Department of Integrative Oncology, Affiliated Cancer Hospital of Shantou University Medical College, Shantou, China
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - C Ke
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - Q Tang
- Department of Integrative Oncology, Affiliated Cancer Hospital of Shantou University Medical College, Shantou, China
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - H Dong
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - X Zheng
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - W Lin
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - J Ke
- Department of Integrative Oncology, Affiliated Cancer Hospital of Shantou University Medical College, Shantou, China
- Cancer Research Center, Shantou University Medical College, Shantou, China
| | - J Huang
- Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular Immunopathology, Shantou University Medical College, Shantou, China
| | - S-CJ Yeung
- Department of Endocrine Neoplasia and Hormonal Disorders, University of Texas MD Anderson Cancer Center, Houston, TX, USA
- Department of Emergency Medicine, University of Texas MD Anderson Cancer Center, Houston, TX, USA
| | - H Zhang
- Department of Integrative Oncology, Affiliated Cancer Hospital of Shantou University Medical College, Shantou, China
- Cancer Research Center, Shantou University Medical College, Shantou, China
- Tumor Tissue Bank, Affiliated Cancer Hospital of Shantou University Medical College, Shantou, China
- Cancer Research Center, Shantou University Medical College, 22 Xinling Road, Shantou, 515041, China. Tel: +86 754 88900406; Fax: +86 754 88900406; E-mail:
| |
Collapse
|
212
|
Wang H, Xie Y, Zhang Q, Xu N, Zhong H, Dong H, Liu L, Jiang T, Wang Q, Xiong L. Transcutaneous electric acupoint stimulation reduces intra-operative remifentanil consumption and alleviates postoperative side-effects in patients undergoing sinusotomy: a prospective, randomized, placebo-controlled trial. Br J Anaesth 2014; 112:1075-82. [PMID: 24576720 DOI: 10.1093/bja/aeu001] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Although opioids are widely used as analgesics in general anaesthesia, they have unpleasant side-effects and can delay postoperative recovery. Acupuncture and related techniques are effective for acute and chronic pain, and reduces some side-effects. We assessed the effect of transcutaneous electric acupoint stimulation (TEAS) on intra-operative remifentanil consumption and the incidences of anaesthesia-related side-effects. METHODS Sixty patients undergoing sinusotomy were randomly assigned to TEAS or control group. TEAS consisted of 30 min of stimulation (6-9 mA, 2/10 Hz) on the Hegu (LI4), Neiguan (PC6), and Zusanli (ST36) before anaesthesia. The patients in the control group had the electrodes applied, but received no stimulation. Bispectral index was used to monitor the depth of anaesthesia. Perioperative haemodynamics were recorded, and peripheral blood samples were collected to measure the levels of mediators of surgical stress. The primary end point was intraoperative remifentanil consumption and the secondary endpoints were recovery quality and anaesthesia-related side-effects. RESULTS Patients in the TEAS group required 39% less remifentanil during surgery than controls [0.0907 (SD 0.026) μg kg(-1) min(-1) vs 0.051 (0.018) μg kg(-1) min(-1)]. There were no differences in intra-operative haemodynamics or surgical stress between groups. However, the time to extubation and recall in the control group was 16.8 (6.8) min and 23.0 (5.0) min, respectively, significantly longer than that in the TEAS group (P<0.01). TEAS also decreased the incidence of dizziness and pruritus within the first 24 h after surgery (P<0.01). CONCLUSION The use of TEAS significantly reduced intra-operative remifentanil consumption and alleviated postoperative side-effects in patients undergoing sinusotomy. CLINICAL TRIAL REGISTRATION The trial was registered at clinicaltrials.gov (NCT01700855).
Collapse
Affiliation(s)
- H Wang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, People's Republic of China
| | - Y Xie
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, People's Republic of China
| | - Q Zhang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, People's Republic of China
| | - N Xu
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, People's Republic of China
| | - H Zhong
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, People's Republic of China
| | - H Dong
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, People's Republic of China
| | - L Liu
- Department of Anesthesiology, School of Medicine, Stony Brook University, New York, NY 11794-8480, USA
| | - T Jiang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, People's Republic of China
| | - Q Wang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, People's Republic of China
| | - L Xiong
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an, 710032 Shaanxi Province, People's Republic of China
| |
Collapse
|
213
|
Wang T, Chen S, Sun J, Cai J, Cheng X, Dong H, Wang X, Xing J, Dong W, Yao H, Dong Y. Identification of factors influencing the pharmacokinetics of voriconazole and the optimization of dosage regimens based on Monte Carlo simulation in patients with invasive fungal infections. J Antimicrob Chemother 2014; 69:463-470. [DOI: 10.1093/jac/dkt369] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/28/2023] Open
|
214
|
Dong H, Dai H, Hu X, Xiong SD, Gao XM. The (1->6)-β-glucan moiety represents a cross-reactive epitope of infection-induced malignancy surveillance. J Immunol 2014; 192:1302-12. [PMID: 24391208 DOI: 10.4049/jimmunol.1301495] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Exposure to pathogen-associated molecular patterns (PAMPs) by vaccination or infection is known to have beneficial effects on neoplastic diseases, although the underlying molecular mechanisms are so far unclear. In this article, we report that Abs against (1→6)-β-d-glucan, a typical microbial PAMP and a major target for high titer circulating natural Abs in healthy human subjects, cross-recognize a novel tumor-associated carbohydrate Ag on cancer cells. The (1→6)-β-glucan cross-reactive moiety is immunologically dominant in tumor cells, as C57BL/6 mice harboring EL-4 solid tumors produced anti-(1→6)-β-glucan Abs and the titer of which significantly correlated with enhanced survival and smaller tumor burden. Moreover, the (1→6)-β-glucan-specific Abs exhibited potent tumoricidal activities in vitro. C57BL/6 mice immunized with Candida albicans produced protective immunity against inoculated EL-4 tumors, which was attributed to the formation of (1→6)-β-glucan-specific Abs. Importantly, (1→6)-β-glucan-specific Abs significantly prolonged the survival and reduced the tumor size in mice inoculated with EL-4 tumors. Our results demonstrate that the (1→6)-β-glucan cross-reactive moiety represents a focal point between infection immunity and cancer surveillance, and natural Abs against this epitope may contribute to the first-line antitumor surveillance in humans. Our data also provide important explanation for the long-observed relationship between feverish infection and concurrent remission from cancer.
Collapse
Affiliation(s)
- Hongliang Dong
- Institutes of Biology and Medical Sciences, Soochow University, Suzhou 215123, China
| | | | | | | | | |
Collapse
|
215
|
Dong H, Shan F, Sun Q, Yang BX, Li CP. The cyclic hexapeptide AcF attenuates sepsis-induced acute lung injury and mortality in rats. Eur Rev Med Pharmacol Sci 2014; 18:2727-2735. [PMID: 25317810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE The purpose of this study was to elucidate the possible beneficial effects of AcF on acute lung injury (ALI) in a rat model of sepsis. MATERIALS AND METHODS Male Sprague-Dawley rats were randomly divided into the following four experimental groups (n = 10 per group): animals undergoing a sham cecal ligature puncture (CLP) (Sham group); animals undergoing CLP (control group); or animals undergoing CLP and treated with saline (Saline group) and animals undergoing CLP and treated with AcF (AcF group). At 24 h after CLP, blood, bronchoalveolar lavage fluid (BALF) and lung tissue were collected. The lung wet/dry weight ratio, Protein concentration and the count of inflammatory cells or neutrophils in the BALF were determined. The pathologic changes in lungs were examined with the optical microscopy. Myeloperoxidase (MPO) activity, the expression of inflammatory cytokines were measured in lung tissue and BALF respectively. Survival rates were recorded at 120h in the four groups in another experiment. RESULTS Histology findings revealed acute lung injury in rats in the CLP group, whereas those in the AcF-treated group had mild lung injury. Treatment with AcF significantly attenuated the CLP-induced pulmonary edema and inflammation, as it significantly decreased lung wet/dry ration, protein concentration and the infiltration of inflammatory cells and neutrophils in the lung tissues. In addition, the secretion of inflammatory cytokines, such as TNF-α, IL-6, IL-1b and macrophage inflammatory protein-2 (MIP-2) was decreased in AcF treated group compared with the control saline treated group. CONCLUSIONS AcF administration ameliorates acute lung injury in a rat model of sepsis induced by CLP. AcF can be developed as a novel treatment for severe sepsis-induced ALI.
Collapse
Affiliation(s)
- H Dong
- Department of Critical Care Medicine, The Affiliated Hospital of Qingdao University, Qingdao, China.
| | | | | | | | | |
Collapse
|
216
|
Courneya KS, Segal RJ, McKenzie DC, Dong H, Gelmon K, Friedenreich CM, Yasui Y, Reid RD, Crawford JJ, Mackey JR. Abstract P4-08-01: Effects of exercise during adjuvant chemotherapy on clinical outcomes in early stage breast cancer. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p4-08-01] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Observational studies suggest that physical activity following a diagnosis of breast cancer may be associated with a lower risk of recurrence and death. Some studies also suggest possible effect modification by disease stage, body mass index, and receptor status. To date, however, there are no randomized trials examining the effects of exercise on disease outcomes in any cancer patient group. Here, we report an exploratory follow-up of disease outcomes from the Supervised Trial of Aerobic versus Resistance Training (START). Patients and Methods: The START Trial was a Canadian multicenter trial that randomized 242 breast cancer patients starting adjuvant chemotherapy to either usual care (n = 82) or supervised aerobic (n = 78) or resistance (n = 82) exercise for the duration of their chemotherapy. The primary efficacy endpoint for this exploratory analysis was disease-free survival (DFS). Secondary endpoints were overall survival (OS), distant disease-free survival (DDFS), and recurrence-free interval (RFI). The two exercise arms were combined for the analysis (n = 160) and selected subgroups were explored. Results: After a median follow-up of 89 months (IQR 81 to 96), there were 25/160 (15.6%) DFS events in the exercise groups and 18/82 (22.0%) in the control group (log-rank p = 0.21). Eight-year DFS was 82.7% for the exercise groups compared with 75.6% for the control group (Hazard ratio [HR] = 0.68, 95% CI = 0.37-1.24). There were 13/160 (8.1%) deaths in the exercise groups and 11/82 (13.4%) in the control group (log-rank p = 0.21). Eight-year OS was 91.2% in the exercise groups compared with 82.7% in the control group (HR = 0.60, 95% CI = 0.27 to 1.33. There were 20/160 (12.5%) DDFS events in the exercise groups and 16/82 (19.5%) in the control group (log-rank p = 0.15). Eight-year DDFS was 86.7% in the exercise groups compared with 78.3% in the control group (HR = 0.62, 95% CI = 0.32 to 1.19). Finally, there were 20/160 (12.5%) RFI events in the exercise groups and 17/82 (20.7%) in the control group (Gray's p = 0.095). Eight-year cumulative incidence of RFI was 12.6% in the exercise groups compared with 21.6% in the control group (HR = 0.58, 95% CI = 0.30 to 1.11). Subgroup analyses for DFS and RFI suggested stronger effects for women who were overweight/obese, had stage II/III cancer, receptor positive tumors, HER2 positive tumors, received taxane-based chemotherapies, and received at least 85% of their intended chemotherapy dose-intensity. The most notable subgroup effect was for patients who received optimal chemotherapy dosing with a borderline significant effect for DFS (HR = 0.50, 95% CI = 0.25 to 1.01) and a significant effect for RFI (HR = 0.38, 95% CI = 0.18 to 0.81). Conclusions: In this exploratory follow-up of the START Trial, there was a suggestion that exercise during adjuvant chemotherapy may improve several efficacy endpoints although none achieved statistical significance. Nevertheless, the magnitude of the effects appear to be meaningful with absolute 8-year survival differences between 7% and 9% and relative rate reductions between 30% and 40%. The START Trial provides the first randomized data to suggest that adding exercise to standard chemotherapy for breast cancer may improve outcomes. A definitive phase III trial is warranted.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P4-08-01.
Collapse
Affiliation(s)
- KS Courneya
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| | - RJ Segal
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| | - DC McKenzie
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| | - H Dong
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| | - K Gelmon
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| | - CM Friedenreich
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| | - Y Yasui
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| | - RD Reid
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| | - JJ Crawford
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| | - JR Mackey
- University of Alberta, Edmonton, AB, Canada; Ottawa Hospital Regional Cancer Center, Ottawa, ON, Canada; University of British Columbia, Vancouver, BC, Canada; British Columbia Cancer Agency, Vancouver, BC, Canada; Alberta Health Services, Calgary, AB, Canada; University of Ottawa Heart Institute, Ottawa, ON, Canada; Cross Cancer Institute, Edmonton, AB, Canada
| |
Collapse
|
217
|
Dahaba AA, Suljevic I, Oettl K, Xiao Z, Dong H, Xiong L, Reibnegger G. Influence of acute normovolemic hemodilution on the pharmacokinetics of Cisatracurium Besylate. Minerva Anestesiol 2013; 79:1238-1247. [PMID: 23698546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Acute normovolemic hemodilution (ANH) is an efficacious blood conservation strategy for avoiding or reducing allogeneic blood transfusion. In a previous publication, on a different cohort of patients, we demonstrated that cisatracurium's potency and duration of action were not influenced by ANH, but we could not establish which role, if any, pharmacokinetics played. METHODS Forty patients were randomly allocated to the ANH or control groups. Patients received cisatracurium single 100 µg kg-1 bolus dose, serial arterial blood samples were collected and assayed for pharmacokinetic analysis. RESULTS Central and steady state apparent volumes of distribution (V1, Vdss) and slope factor (γ) were larger, effect-compartment concentration at 50% neuromuscular block was lower in the ANH (90.8±41.6 mL kg-1, 159.1±39.2 mL kg-1, 6.0±0.9 and 136.4±29.1 ng·mL-1) compared with the control group (65.5±26.1 mL kg-1, 134.8±31.8 mL kg-1, 5.5±0.8 and 158.5±26.0 ng·mL-1) respectively. Elimination half-life (t1/2 β) and mean residence time (MRT) were longer in the ANH (37.2±20.9, 23.5±13.2 min) than the control group (26.8±9.8, 16.9±6.2 min), albeit not statistically significant (P=0.051, P=0.051). There were no significant differences in distribution half-life (t1/2 α), effect-compartment equilibration rate-constant (keo), central and total clearances (Clc, Cl) between the ANH (2.4±1.2 min, 0.070±0.013 min-1, 6.1±1.9 mL kg-1 min-1 and 7.7±2.3 mL kg-1 min-1) and control group (1.9±1.2 min, 0.063±0.008 min-1, 7.0±1.8 mL kg-1 min-1 and 8.5±2.1 mL kg-1 min-1) respectively. CONCLUSION ANH altered some pharmacokinetic parameters such as significantly larger volumes of distribution. Other parameters such as elimination half-life were considerably longer albeit not statistically significant.
Collapse
Affiliation(s)
- A A Dahaba
- Department of Anaesthesiology and Intensive Care Medicine, Medical University of Graz, Graz, Austria -
| | | | | | | | | | | | | |
Collapse
|
218
|
Tong L, Cai M, Huang Y, Zhang H, Su B, Li Z, Dong H. Activation of K(2)P channel-TREK1 mediates the neuroprotection induced by sevoflurane preconditioning. Br J Anaesth 2013; 113:157-67. [PMID: 24154701 PMCID: PMC4062297 DOI: 10.1093/bja/aet338] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Background Preconditioning with volatile anaesthetic agents induces tolerance to focal cerebral ischaemia, although the underlying mechanisms have not been clearly defined. The present study analyses whether TREK-1, a two-pore domain K+ channel and target for volatile anaesthetics, plays a role in mediating neuroprotection by sevoflurane. Methods Differentiated SH-SY5Y cells were preconditioning with sevoflurane and challenged by oxygen–glucose deprivation (OGD). Cell viability and expression of caspase-3 and TREK-1 were evaluated. Rats that were preconditioned with sevoflurane were subjected to middle cerebral artery occlusion (MCAO), and the expression of TREK-1 protein and mRNA was analysed. Neurological scores were evaluated and infarction volume was examined. Results Sevoflurane preconditioning reduced cell death in differentiated SH-SY5Y cells challenged by OGD. Sevoflurane preconditioning reduced infarct volume and improved neurological outcome in rats subjected to MCAO. Sevoflurane preconditioning increased levels of TREK-1 mRNA and protein. Knockdown of TREK-1 significantly attenuated sevoflurane preconditioning-induced neuroprotective effects in vitro and in vivo. Conclusions Sevoflurane preconditioning-induced neuroprotective effects against transient cerebral ischaemic injuries involve TREK-1 channels. These results suggest a novel mechanism for sevoflurane preconditioning-induced tolerance to focal cerebral ischaemia.
Collapse
Affiliation(s)
- L Tong
- Department of Anesthesiology, Xijing Hospital, Xi'an, Shanxi 710032, China
| | - M Cai
- Department of Anesthesiology, Xijing Hospital, Xi'an, Shanxi 710032, China
| | - Y Huang
- Department of Anesthesiology, Xijing Hospital, Xi'an, Shanxi 710032, China
| | - H Zhang
- Department of Anesthesiology, Xijing Hospital, Xi'an, Shanxi 710032, China
| | - B Su
- Department of Anesthesiology, Xijing Hospital, Xi'an, Shanxi 710032, China
| | - Z Li
- Department of Anesthesiology, Xijing Hospital, Xi'an, Shanxi 710032, China
| | - H Dong
- Department of Anesthesiology, Xijing Hospital, Xi'an, Shanxi 710032, China
| |
Collapse
|
219
|
Zhang H, Li X, Ma R, Li X, Zhou Y, Dong H, Li X, Li Q, Zhang M, Liu Z, Wei B, Cui M, Wang H, Gao J, Yang H, Hou P, Miao Z, Chai T. Airborne spread and infection of a novel swine-origin influenza A (H1N1) virus. Virol J 2013; 10:204. [PMID: 23800032 PMCID: PMC3700749 DOI: 10.1186/1743-422x-10-204] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Accepted: 05/07/2013] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND The novel swine-origin influenza A (H1N1) virus (S-O 2009 IV) can cause respiratory infectious diseases in humans and pigs, but there are few studies investigating the airborne spread of the virus. In January 2011, a swine-origin H1N1 epidemic emerged in eastern China that rapidly spread to neighboring farms, likely by aerosols carried by the wind. METHODS In this study, quantitative reverse transcription polymerase chain reaction (RT-PCR) was used to detect viruses in air samples from pig farms. Based on two aerosol infection models (Pig and guinea pig), we evaluated aerosol transmission and infection of the novel S-O 2009 IV isolate. RESULTS Three novel S-O 2009 IV were isolated from the diseased pig. The positive rate and viral loads of air samples were 26.1% and 3.14-5.72 log₁₀copies/m³ air, respectively. In both pig and guinea pig infection models, the isolate (A/swine/Shandong/07/2011) was capable of forming aerosols and infected experimental animals at a range of 2.0-4.2 m by aerosols, but aerosol route was less efficient than direct contact. CONCLUSIONS The results indicated that S-O 2009 IV is able to be aerosolized by infected animals and to be transmitted to susceptible animals by airborne routes.
Collapse
Affiliation(s)
- Hongna Zhang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
- Sino-German Cooperative Research Centre for Zoonosis of Animal Origin Shandong Province, Tai’an, Shandong, China
- Key Laboratory of Animal Biotechnology and Disease Control and Prevention of Shandong Province, Tai’an, Shandong, China
| | - Xin Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Ruihua Ma
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
- Affiliated Hospital of the Shandong Agricultural University, Tai’an, China
| | - Xiaoxia Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
- Taishan Medical University, Tai’an, China
| | - Yufa Zhou
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
- The Animal Husbandry Bureau of Tai’an City, Tai’an, China
| | - Hongliang Dong
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Xinxian Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Qinglei Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Mingliang Zhang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Zhihao Liu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Baozhi Wei
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Mingchao Cui
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Hao Wang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Jing Gao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| | - Huili Yang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
- Centre for Disease Control, Tai’an, the People’s Republic of China, Tai’an, China
| | - Peiqiang Hou
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
- Centre for Disease Control, Tai’an, the People’s Republic of China, Tai’an, China
| | - Zengmin Miao
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
- Taishan Medical University, Tai’an, China
| | - Tongjie Chai
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Daizong Street 61, Tai’an 271018, China
| |
Collapse
|
220
|
Song W, Huo T, Guo F, Wang H, Wei H, Yang Q, Dong H, Wang Q, Xiong L. Globular adiponectin elicits neuroprotection by inhibiting NADPH oxidase-mediated oxidative damage in ischemic stroke. Neuroscience 2013; 248:136-44. [PMID: 23756185 DOI: 10.1016/j.neuroscience.2013.05.063] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/09/2013] [Accepted: 05/31/2013] [Indexed: 12/12/2022]
Abstract
Recent studies indicate that adiponectin can attenuate cerebral ischemic lesions via its functional area located in the C-terminal globular domain, which is called globular adiponectin (gAD). However, the mechanisms underlying this action remain unclear. In this study, we investigated the antioxidant properties of gAD during cerebral ischemia. Adult male C57BL/6 mice received an intracerebral injection of gAD with or without tetrabromocinnamic acid (TBCA, a NADPH oxidase activator). Mice were subjected to middle cerebral artery occlusion (MCAO) after gAD injection. Infarct volume, neurological function, the activity of antioxidant enzymes (superoxide dismutase [SOD], catalase), the content of malondialdehyde (MDA), and the expression of Bax, Bcl-2, cleaved caspase-3 and NADPH oxidase 2 (NOX2) were examined at 24h after MCAO. Infarct volume was attenuated in gAD-transduced mice when compared with mice in the MCAO group, with significant improvement in neurological function. In addition, neuronal apoptosis was attenuated, along with the expression of Bax/Bcl-2 and cleaved caspase 3. Furthermore, the activities of SOD and catalase increased, and the content of MDA reduced. However, TBCA blocked the effect of gAD on cerebral protection and its antioxidant abilities. Taken together, these results demonstrate that the neuroprotective action of gAD may result from the promotion of antioxidant capacity by inhibiting the NOX2 signaling system.
Collapse
Affiliation(s)
- W Song
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China; Department of Anesthesiology, Shaanxi Province People's Hospital, Xi'an 710068, Shaanxi Province, PR China
| | - T Huo
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - F Guo
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - H Wang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - H Wei
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - Q Yang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - H Dong
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China
| | - Q Wang
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China.
| | - L Xiong
- Department of Anesthesiology, Xijing Hospital, Fourth Military Medical University, Xi'an 710032, Shaanxi Province, PR China.
| |
Collapse
|
221
|
Zhang W, Li H, Dong H, Liao J, Hammock BD, Yang G. Soluble epoxide hydrolase (sEH) deficiency inhibits DSS‐Induced colitis and carcinogenesis in Mice. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.1104.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - H Li
- Northwestern UniversityChicagoIL
| | - H Dong
- University of CaliforniaDavisCA
| | - J Liao
- Northwestern UniversityChicagoIL
| | | | - G‐Y Yang
- Northwestern UniversityChicagoIL
| |
Collapse
|
222
|
Jiao T, Dong H, Jin L, Wang S, Wang J. A novel nicastrin mutation in a large Chinese family with hidradenitis suppurativa. Br J Dermatol 2013; 168:1141-3. [DOI: 10.1111/bjd.12135] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
223
|
Zhang H, Zheng M, Lei B, Xiao Y, Dong H, Liu Y, Liu X, Deng J, Deng J, Huang Z. Preparation and Long-Lasting Phosphorescence Properties of BaAlSi5N7O2:Eu2+. ACTA ACUST UNITED AC 2013. [DOI: 10.1149/2.003306ssl] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
224
|
Liu L, Han X, Liu R, Bai H, Dong H, Ding C, Liu H, Yu S. [Effect of autoinducer 2 on Riemerell antatipestifer adherence and invasion to Vero cells]. Wei Sheng Wu Xue Bao 2013; 53:313-319. [PMID: 23678579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVE Autoinducer 2 (AI-2), used to communicate among bacterial species, regulates numerous physiological functions of bacteria. In this study, we studied the effect of AI-2 on adherence and invasion of Riemerella antatipestifer (RA) strain CH3 to Vero cells and transcriptional levels of virulence-related and metabolism-related genes were investigated. METHODS To verify whether the adherence and invasion of CH3 was affected by AI-2, we added different concentrations of AI-2 to the cocultures of Vero cells and CH3 and then calculated adherence percentages and invasion percentages of tested groups. We further added AI-2 (184.0 micromol/L) to the tryptone soya broth culture of CH3 and then detected the effect of transcriptional levels of related genes of CH3 using real-time PCR. RESULTS The adherence of CH3 to Vero cells was decreased most to 62% with 18.4 micromol/L AI-2 and the invasion of CH3 to Vero cells was increased most to 194% with 184.0 micromol/L AI-2. The result of real-time PCR shows that AI-2 increased transcriptional levels of some virulence-related genes and decreased transcriptional levels of some metabolism-related genes. CONCLUSION These results suggest that AI-2 affected adherence and invasion of CH3 to Vero cells. Moreover, AI-2 could regulate some genes of CH3 to modulate particular physiological behaviors.
Collapse
Affiliation(s)
- Lei Liu
- Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences (CAAS), Shanghai 200241, China.
| | | | | | | | | | | | | | | |
Collapse
|
225
|
Abstract
Development of an in vitro Eimeria (E.) tenella model could be valuable as a tool for vaccine, coccidiostats or molecular biology research. 1.0 × 10,000 sporozoites per 0.1 mL were inoculated into the allantoic cavity of ten-day-old chicken embryos. The complete life-cycle of E. tenella was accomplished in eight-nine days at 37 °C and 70% humidity. The addition of 100 U insulin to the embryos could remarkably improve the output of oocysts. The development of the parasite within the embryos was systematically observed, allowing guidelines to be set regarding the appropriate times at which different developmental stages of the parasite may be sampled.
Collapse
Affiliation(s)
- L Jiang
- Key Laboratory for Animal Parasitology, Ministry of Agriculture, Shanghai Veterinary Research Institute, Chinese Academy of Agricultural Sciences, No. 518 Ziyue Road, Minhang District, Shanghai 200241, China
| | | | | | | | | | | |
Collapse
|
226
|
Zeng YB, Dong H, Han HY, Jiang LL, Zhao QP, Zhu SH, Ma WJ, Cheng J, Huang B. The Ultrastructural Effects of Sulfachloropyrazine on Toxoplasma gondii Tachyzoites. Iran J Parasitol 2013; 8:73-7. [PMID: 23682263 PMCID: PMC3655243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 12/12/2012] [Indexed: 10/27/2022]
Abstract
BACKGROUND Toxoplasmosis is one of the most common parasitic infections of humans and other mammals. This study was aimed to understand the mechanism of action of veterinary medicine-sulfachloropyrazine (SPZ, 99.97%) against Toxoplasma gondii. METHODS T. gondii tachyzoites were soaked in PBS (as a control) or SPZ (250 mg/mL) for 2 h at 37 °C. After being processed, any ultrastructural changes of the tachyzoites that had occurred were observed by Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM). RESULTS The tachyzoites from control groups with a uniform size had a smooth surface and intact cell or nuclear membranes. In addition, an oval-shaped nucleus, conoids and micronemes were also observed. By contrast, many parasites from the SPZ-treated groups were detrimentally affected by the treatment. Some appeared to be of the vacuolization in their cytoplasm, with the substantial reduction in the number of dense granules and the blur of some organelles. CONCLUSION The morphology and ultrastructure of tachyzoites can be affected significantly by SPZ, which might kill the parasite by inhibiting its energy metabolism, inducing apoptosis and damaging its structure. The study provides an experimental basis for further study on the mechanism of SPZ against T. gondii.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - B Huang
- Corresponding author:Tel.: 86-21-34293464,
| |
Collapse
|
227
|
Dong H, Han X, Bai H, He L, Liu L, Liu R, Chai T, Ding C, Liu H, Yu S. [Mutation of lambdapL/pR-cI857 system for production of bacterial ghost in Escherichia coli]. Sheng Wu Gong Cheng Xue Bao 2012; 28:1423-1430. [PMID: 23593866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Bacterial ghost is intact envelope of Gram-negative bacteria, which is produced by the function of the lysis gene E from bacteriophage PhiX174. The expression of the lysis gene E is usually controlled by the thermosensitive lambdapL/pR-cI857 promoter. In this study, we described a mutation (T --> C) at the ninth nucleotide of the OR2 in the lambdapR promoter of the lambdapL/pR-cI857 system by overlap PCR. The bacteriolytic assay showed that the mutation in the lambdapL/pR-cI857 system enhanced the temperature of repressing the expression of gene E up to 37 degrees C. The lysis efficiency of altered lambdapR promoter in Escherichia coli DH5a and avian pathogenic E. coli DE17 was up to 99.9%. The expanded range of temperature will benefit for the production of bacterial ghost.
Collapse
Affiliation(s)
- Hongliang Dong
- School of Animal Science and Technology, Shandong Agricultural University, Taian 271100, Shandong, China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
228
|
Friedlander T, Ngo V, Doty S, Zhao Q, Dong H, Ryan C, Chen W, Paris P. 490 Detection and Genomic Interrogation of Circulating Tumor Cells (CTCs) and Circulating Tumor Stem Cells (CTSCs) From Men with Metastatic Castration-resistant Prostate Cancer (mCRPC). Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)72288-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
229
|
Brown J, Reddy S, Cunningham K, Dong H, Ibram F, Clatworthy P, Wiggins J. TEST YOUR MEMORY (TYM) TESTING IN NON-ALZHEIMER DEMENTIAS. J Neurol Neurosurg Psychiatry 2012. [DOI: 10.1136/jnnp-2012-304200a.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
230
|
Han X, Bai H, Liu L, Dong H, Liu R, Song J, Ding C, Qi K, Liu H, Yu S. The luxS gene functions in the pathogenesis of avian pathogenic Escherichia coli. Microb Pathog 2012; 55:21-7. [PMID: 23046700 DOI: 10.1016/j.micpath.2012.09.008] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Revised: 09/25/2012] [Accepted: 09/26/2012] [Indexed: 11/24/2022]
Abstract
Avian pathogenic Escherichia coli (APEC) causes avian colibacillosis, the most significant infectious bacterial disease of poultry worldwide. LuxS, the product of the luxS gene, mediates the quorum sensing (QS) mechanism. This involves the production of autoinducer-2 (AI-2), which regulates important physiological traits and a variety of adaptive processes in different bacteria. In this study, a luxS gene deleted APEC mutant strain, ΔDE17, was constructed using strain DE17. Analysis of bioluminescence indicated that deletion of the luxS gene abolished the production of the QS signal AI-2 in the bacteria. Further studies showed that deletion of the luxS gene in DE17 reduced the bacterial virulence by 31.5-fold in ducklings, based on the measurement of the 50% lethal dose. The mutant strain reduced significantly the abilities of adherence and invasion, by 50.0% and 40.7% respectively, compared with the wild strain DE17. The mutant strain also showed reduced survival in vivo: the bacterial loads of the mutant strain in infected liver, spleen and blood were 46.4-fold, 5.2-fold, and 3.7-fold reduced, respectively, compared with the wild-type strain DE17. Real-time polymerase chain reaction (PCR) demonstrated further that the mRNA levels of the virulence-related genes iucD, fyuA, vat, ompA, iss, fimC and tsh were significantly decreased in the mutant strain ΔDE17, when compared with DE17 (p < 0.05). In addition, the deletion of the luxS gene reduced the motility of the bacterium. This study suggests that the luxS gene functions in the pathogenesis of diseases caused by avian pathogenic E. coli.
Collapse
Affiliation(s)
- Xiangan Han
- Shanghai Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Shanghai, PR China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
231
|
Dong H, Zhang Y, Xi H. The Effects of Epidural Anaesthesia and Analgesia on Natural Killer Cell Cytotoxicity and Cytokine Response in Patients with Epithelial Ovarian Cancer Undergoing Radical Resection. J Int Med Res 2012. [PMID: 23206463 DOI: 10.1177/030006051204000520] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Objective: Epidural anaesthesia appears to promote antitumourigenic activity in patients with malignant disease who are undergoing surgery. This study investigated immune function in women with epithelial ovarian cancer undergoing radical resection with either general anaesthesia alone or in combination with epidural anaesthesia. Methods: Patients ( n = 61) were randomized to receive either combined general/epidural anaesthesia (study group) or general anaesthesia alone (control group). Natural killer cell cytotoxicity (NKCC) and serum concentrations of four cytokines (interleukin [IL]-1β, -8 and -10 and interferon [IFN]-γ) were measured before anaesthesia ( Tpre) and 4h after skinincision ( T4 h) in both groups. Results: In both groups, concentrations of protumourigenic cytokines (IL-1β and IL-8) were significantly higher at T4 h than at Tpre, while concentrations of antitumourigenic cytokines (IL-10 and IFN-γ) and NKCC were significantly lower at T4 h. The study group had significantly higher NKCC, IL-10 and IFN-γ levels and lower IL-1β and IL-8 levels at TT h compared with the control group. Conclusion: Combined general/epidural anaesthesia appeared to promote antitumourigenic NKCC and cytokine responses.
Collapse
Affiliation(s)
- H Dong
- Department of Anaesthesiology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - Y Zhang
- Department of Anaesthesiology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| | - H Xi
- Department of Anaesthesiology, Second Affiliated Hospital of Harbin Medical University, Harbin, China
| |
Collapse
|
232
|
Ulu A, Appt S, Morisseau C, Hwang SH, Jones PD, Rose TE, Dong H, Lango J, Yang J, Tsai HJ, Miyabe C, Fortenbach C, Adams MR, Hammock BD. Pharmacokinetics and in vivo potency of soluble epoxide hydrolase inhibitors in cynomolgus monkeys. Br J Pharmacol 2012; 165:1401-12. [PMID: 21880036 DOI: 10.1111/j.1476-5381.2011.01641.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND AND PURPOSE Soluble epoxide hydrolase inhibitors (sEHIs) possess anti-inflammatory, antiatherosclerotic, antihypertensive and analgesic properties. The pharmacokinetics (PK) and pharmacodynamics in terms of inhibitory potency of sEHIs were assessed in non-human primates (NHPs). Development of a sEHI for use in NHPs will facilitate investigations on the role of sEH in numerous chronic inflammatory conditions. EXPERIMENTAL APPROACH PK parameters of 11 sEHIs in cynomolgus monkeys were determined after oral dosing with 0.3 mg·kg(-1). Their physical properties and inhibitory potency in hepatic cytosol of cynomolgus monkeys were examined. Dose-dependent effects of the two inhibitors 1-trifluoromethoxyphenyl-3-(1-propionylpiperidin-4-yl) urea (TPPU) and the related acetyl piperidine derivative, 1-trifluoromethoxyphenyl-3-(1-acetylpiperidin-4-yl) urea (TPAU), on natural blood eicosanoids, were determined. KEY RESULTS Among the inhibitors tested, TPPU and two 4-(cyclohexyloxy) benzoic acid urea sEHIs displayed high plasma concentrations (>10 × IC(50)), when dosed orally at 0.3 mg·kg(-1). Although the 4-(cyclohexyloxy) benzoic acid ureas were more potent against monkey sEH than piperidyl ureas (TPAU and TPPU), the latter compounds showed higher plasma concentrations and more drug-like properties. The C(max) increased with dose from 0.3 to 3 mg·kg(-1) for TPPU and from 0.1 to 3 mg·kg(-1) for TPAU, although it was not linear over this range of doses. As an indication of target engagement, ratios of linoleate epoxides to diols increased with TPPU administration. CONCLUSION AND IMPLICATIONS Our data indicate that TPPU is suitable for investigating sEH biology and the role of epoxide-containing lipids in modulating inflammatory diseases in NHPs.
Collapse
Affiliation(s)
- A Ulu
- Department of Entomology and Cancer Center, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
233
|
Dong H, Marcusson J, Wressle E, Unosson M. Relative handgrip strength as a predictor for Swedish 88-year-old women's functional status. Eur Geriatr Med 2012. [DOI: 10.1016/j.eurger.2012.07.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
234
|
Dai H, Han XQ, Gong FY, Dong H, Tu PF, Gao XM. Structure elucidation and immunological function analysis of a novel -glucan from the fruit bodies of Polyporus umbellatus (Pers.) Fries. Glycobiology 2012; 22:1673-83. [DOI: 10.1093/glycob/cws099] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
|
235
|
Schaefer CE, Towne RM, Lazouskaya V, Bishop ME, Dong H. Diffusive flux and pore anisotropy in sedimentary rocks. J Contam Hydrol 2012; 131:1-8. [PMID: 22326688 DOI: 10.1016/j.jconhyd.2012.01.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 01/09/2012] [Accepted: 01/10/2012] [Indexed: 05/31/2023]
Abstract
Diffusion of dissolved contaminants into or from bedrock matrices can have a substantial impact on both the extent and longevity of dissolved contaminant plumes. For layered rocks, bedding orientation can have a significant impact on diffusion. A series of laboratory experiments was performed on minimally disturbed bedrock cores to measure the diffusive flux both parallel and normal to mineral bedding of four different anisotropic sedimentary rocks. Measured effective diffusion coefficients ranged from 4.9×10(-8) to 6.5×10(-7)cm(2)/s. Effective diffusion coefficients differed by as great as 10-folds when comparing diffusion normal versus parallel to bedding. Differences in the effective diffusion coefficients corresponded to differences in the "apparent" porosity in the orientation of diffusion (determined by determining the fraction of pore cross-sectional area measured using scanning electron microscopy), with the difference in apparent porosity between normal and parallel bedding orientations differing by greater than 2-folds for two of the rocks studied. Existing empirical models failed to provide accurate predictions of the effective diffusion coefficient in either bedding orientation for all four rock types studied, indicating that substantial uncertainty exists when attempting to predict diffusive flux through sedimentary rocks containing mineral bedding. A modified model based on the apparent porosity of the rocks provided a reasonable prediction of the experimental diffusion data.
Collapse
Affiliation(s)
- C E Schaefer
- Shaw Environmental, Inc., Lawrenceville, NJ 08648, United States.
| | | | | | | | | |
Collapse
|
236
|
Cai CY, Dong H, Sun CP. Multiparticle quantum Szilard engine with optimal cycles assisted by a Maxwell's demon. Phys Rev E Stat Nonlin Soft Matter Phys 2012; 85:031114. [PMID: 22587045 DOI: 10.1103/physreve.85.031114] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2011] [Indexed: 05/31/2023]
Abstract
We present a complete-quantum description of a multiparticle Szilard engine that consists of a working substance and a Maxwell's demon. The demon is modeled as a multilevel quantum system with specific quantum control, and the working substance consists of identical particles obeying Bose-Einstein or Fermi-Dirac statistics. In this description, a reversible scheme to erase the demon's memory by a lower-temperature heat bath is used. We demonstrate that (1) the quantum control of the demon can be optimized for a single-particle Szilard engine so that the efficiency of the demon-assisted thermodynamic cycle could reach the Carnot cycle's efficiency and (2) the low-temperature behavior of the working substance is very sensitive to the quantum statistics of the particles and the insertion position of the partition.
Collapse
Affiliation(s)
- C Y Cai
- State Key Laboratory of Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Science, Beijing 100190, People's Republic of China
| | | | | |
Collapse
|
237
|
Liu D, Dong H, Bishop ME, Zhang J, Wang H, Xie S, Wang S, Huang L, Eberl DD. Microbial reduction of structural iron in interstratified illite-smectite minerals by a sulfate-reducing bacterium. Geobiology 2012; 10:150-162. [PMID: 22074236 DOI: 10.1111/j.1472-4669.2011.00307.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Clay minerals are ubiquitous in soils, sediments, and sedimentary rocks and could coexist with sulfate-reducing bacteria (SRB) in anoxic environments, however, the interactions of clay minerals and SRB are not well understood. The objective of this study was to understand the reduction rate and capacity of structural Fe(III) in dioctahedral clay minerals by a mesophilic SRB, Desulfovibrio vulgaris and the potential role in catalyzing smectite illitization. Bioreduction experiments were performed in batch systems, where four different clay minerals (nontronite NAu-2, mixed-layer illite-smectite RAr-1 and ISCz-1, and illite IMt-1) were exposed to D. vulgaris in a non-growth medium with and without anthraquinone-2,6-disulfonate (AQDS) and sulfate. Our results demonstrated that D. vulgaris was able to reduce structural Fe(III) in these clay minerals, and AQDS enhanced the reduction rate and extent. In the presence of AQDS, sulfate had little effect on Fe(III) bioreduction. In the absence of AQDS, sulfate increased the reduction rate and capacity, suggesting that sulfide produced during sulfate reduction reacted with the phyllosilicate Fe(III). The extent of bioreduction of structural Fe(III) in the clay minerals was positively correlated with the percentage of smectite and mineral surface area of these minerals. X-ray diffraction, and scanning and transmission electron microscopy results confirmed formation of illite after bioreduction. These data collectively showed that D. vulgaris could promote smectite illitization through reduction of structural Fe(III) in clay minerals.
Collapse
Affiliation(s)
- D Liu
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | | | | | | | | | | | | | | | | |
Collapse
|
238
|
Liu P, Xu B, Shen W, Zhu H, Wu W, Fu Y, Chen H, Dong H, Zhu Y, Miao K, Xu W, Li J. Dysregulation of TNFα-induced necroptotic signaling in chronic lymphocytic leukemia: suppression of CYLD gene by LEF1. Leukemia 2011; 26:1293-300. [DOI: 10.1038/leu.2011.357] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
239
|
Tao X, Dong H, Zhang H, Xin H. Sex-based responses of plasma creatine kinase in broilers to thermoneutral constant and cyclic high temperatures. Br Poult Sci 2011; 52:800-6. [DOI: 10.1080/00071668.2011.628639] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
240
|
Dong H, Deng M, Song M, Chen J, Wang Q. Kruppel-like factor 4 promotes differentiation of endothelial progenitor cells into endothelial cells by up-regulating endothelial nitric oxide synthase. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.152] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
|
241
|
Abstract
To investigate the functions of signal transducers and activators of transcription 1 (STAT1)-induced anti-hepatitis C viral (HCV) effects, a stable Huh7.5 cell line (Huh7.5-STAT1ER) was established that constitutively expresses a fusion protein (STAT1ER) of STAT1 and the mouse oestrogen receptor (ER), which forms STAT1ER homodimers after 4-hydroxytamoxifen (4-HT) treatment. This inducible and cytokine/receptor-independent STAT1 activation system allowed us to investigate the anti-HCV effects of STAT1ER activation after inducing IFN-stimulated gene (ISG) expression. The anti-HCV effects of dimerized STAT1ER fusion protein were determined by real-time PCR in a time-dependent fashion post-HCV (JFH-1) infection. HCV (JFH-1) RNA decreased 48% at 72 h after 4-HT treatment. To distinguish the inhibitory effects of STAT1ER activation on HCV RNA replication or HCV internal ribosomal entry site (IRES)-mediated translation, a dicistronic pRL-HL construct was used in the studies. Both cellular (Cap-dependent) and HCV IRES-mediated (Cap-independent) translation were decreased by 63% and 57% at 72 h post-STAT1ER activation in the STAT1ER cell line. In our previous studies, interferon-induced transmembrane protein 3 [(IFITM3) (1-8U)] was found to inhibit HCV RNA replication. Subsequently, elevated expression of the 1-8U gene was confirmed by Western blotting in the Huh7.5-STAT1ER cell line. To further investigate the 1-8U function with both in vivo and in vitro studies, the 1-8U gene was found to suppress cellular and HCV IRES-mediated translation.
Collapse
Affiliation(s)
- L. Yao
- Division of Gastroenterology, Department of Medicine, College of Medicine-Jacksonville, University of Florida, Jacksonville, FL
| | - H. Dong
- Department of Pathology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - H. Zhu
- Department of Molecular Medicine, College of Biology Hunan University, Changsha, Hunan Province, China
| | - D. Nelson
- Department of Medicine, College of Medicine, University of Florida, Gainesville, FL
| | - C. Liu
- Department of Pathology, College of Medicine, University of Florida, Gainesville, FL, USA
| | - L. Lambiase
- Division of Gastroenterology, Department of Medicine, University of Tennessee College of Medicine, Chattanooga, TN, USA
| | - X. Li
- Division of Gastroenterology, Department of Medicine, College of Medicine-Jacksonville, University of Florida, Jacksonville, FL
| |
Collapse
|
242
|
Fan YH, Dong H, Pan Q, Cao YJ, Li H, Wang HC. Notch signaling may negatively regulate neonatal rat cardiac fibroblast-myofibroblast transformation. Physiol Res 2011; 60:739-48. [PMID: 21812518 DOI: 10.33549/physiolres.932149] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Cardiac fibroblast-myofibroblast transformation (CMT) is a critical event in the initiation of myocardial fibrosis. Notch signaling has been shown to regulate myofibroblast transformation from other kinds of cells. However, whether Notch signaling is also involved in CMT remains unclear. In the present study, expressions of Notch receptors in cardiac fibroblasts (CFs) were examined, effects of Notch signaling inhibitor N-[N-(3,5-difluorophenacetyl)-l-alanyl]-S-phenylglycine t-butyl ester (DAPT) and transforming growth factor-beta1 (TGF-beta1) on CMT were determined by increasing alpha-smooth muscle actin (alpha-SMA) expression and collagen synthesis, and Notch signaling was examined by analyzing expressions of Notch receptors. The results showed that: (1) Notch receptor 1, 2, 3 and 4 were all expressed in CFs; (2) DAPT promoted CMT in a time-dependent manner; (3) During the period of CMT induced by TGF-beta1, expressions of Notch receptor 1, 3 and 4 in CFs were down-regulated, whereas there was no change for Notch receptor 2. Moreover, the downtrends of Notch 1, 3 and 4 were corresponding to the trend growth of alpha-SMA expression and collagen synthesis. These results suggested that inhibiting of Notch signaling might promote CMT. The down-regulations of Notch receptor 1, 3 and 4 induced by TGF-beta1 may facilitate CMT. In conclusion, inhibition of Notch signaling might be a novel mechanism of CMT in myocardial fibrosis.
Collapse
Affiliation(s)
- Y-H Fan
- Department of Cardiology, Xijing Hospital, The Fourth Military Medical University, Xi'an, PR China
| | | | | | | | | | | |
Collapse
|
243
|
Stanganelli I, Argenziano G, Sera F, Blum A, Ozdemir F, Karaarslan IK, Piccolo D, Peris K, Kirchesch H, Bono R, Pizzichetta MA, Gasparini S, Braun RP, Correia O, Thomas L, Zaballos P, Puig S, Malvehy J, Scalvenzi M, Rabinovitz H, Bergamo A, Pellacani G, Longo C, Pavlovic M, Rosendahl C, Hofmann-Wellenhof R, Cabo H, Marghoob AA, Langford D, Astorino S, Manganoni AM, Gourhant JY, Keir J, Grichnik JM, Fumo G, Dong H, Sortino Rachou AM, Ferrara G, Zalaudek I. Dermoscopy of scalp tumours: a multi-centre study conducted by the international dermoscopy society. J Eur Acad Dermatol Venereol 2011; 26:953-63. [PMID: 21790795 DOI: 10.1111/j.1468-3083.2011.04188.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Little is known about the dermoscopic features of scalp tumours. Objective To determine the dermoscopic features of scalp tumours. METHODS Retrospective analysis of dermoscopic images of histopathologically diagnosed scalp tumours from International Dermoscopy Society members. RESULTS A total of 323 tumours of the scalp from 315 patients (mean age: 52 years; range 3-88 years) were analysed. Scalp nevi were significantly associated with young age (<30 years) and exhibited a globular or network pattern with central or perifollicular hypopigmentation. Melanoma and non-melanoma skin cancer were associated with male gender, androgenetic alopecia, age >65 years and sun damage. Atypical network and regression were predictive for thin (≤1 mm) melanomas, whereas advanced melanomas (tumour thickness > 1 mm) revealed blue white veil, unspecific patterns and irregular black blotches or dots. CONCLUSIONS The data collected provide a new knowledge regarding the clinical and dermoscopy features of pigmented scalp tumours.
Collapse
Affiliation(s)
- I Stanganelli
- Skin Cancer Unit, Istituto Tumori Romagna (IRST), Meldola (FC), Italy
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
244
|
Abstract
AIMS To simplify the electrotransformation process of Clostridium acetobutylicum, which currently needs to be performed in an anaerobic chamber, thus laborious and time-consuming. METHODS AND RESULTS The CAC2634 gene encoding PerR is a known peroxide regulon repressor in Cl. acetobutylicum. CAC2634 in a previously constructed Restriction-Modification system deficient Cl. acetobutylicum mutant SMB009 was disrupted using ClosTron method. The resulted mutant SMB012 can be electrotransformed in air with an efficiency of 1.2-3.1 × 10(3) transformants μg(-1) DNA. CONCLUSIONS We demonstrated that the disruption of CAC2634 in Cl. acetobutylicum enables its electrotransformation in air. SIGNIFICANCE AND IMPACT OF THE STUDY The electrotransformation process of Cl. acetobutylicum could be significantly simplified, especially when operating multiple electrotransformations.
Collapse
Affiliation(s)
- H Dong
- Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | | | | | | | | |
Collapse
|
245
|
Dong H, Xu DZ, Cai CY, Sun CP. Quantum Maxwell's demon in thermodynamic cycles. Phys Rev E Stat Nonlin Soft Matter Phys 2011; 83:061108. [PMID: 21797303 DOI: 10.1103/physreve.83.061108] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2010] [Revised: 03/01/2011] [Indexed: 05/31/2023]
Abstract
We study the physical mechanism of Maxwell's demon (MD), which helps do extra work in thermodynamic cycles with the heat engine. This is exemplified with one molecule confined in an infinitely deep square potential with a movable solid wall. The MD is modeled as a two-level system (TLS) for measuring and controlling the motion of the molecule. The processes in the cycle are described in a quantum fashion. It is discovered that a MD with quantum coherence or one at a temperature lower than the molecule's heat bath can enhance the ability of the whole working substance, formed by the heat engine plus the MD, to do work outside. This observation reveals that the essential role of the MD is to drive the whole working substance off equilibrium, or equivalently, to work between two heat baths with different effective temperatures. The elaborate studies with this model explicitly reveal the effect of finite size off the classical limit or thermodynamic limit, which contradicts common sense on a Szilard heat engine (SHE). The quantum SHE's efficiency is evaluated in detail to prove the validity of the second law of thermodynamics.
Collapse
Affiliation(s)
- H Dong
- Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing, China
| | | | | | | |
Collapse
|
246
|
Meng L, Lu L, Murphy KM, Yuede CM, Cheverud JM, Csernansky JG, Dong H. Neuroanatomic and behavioral traits for autistic disorders in age-specific restricted index selection mice. Neuroscience 2011; 189:215-22. [PMID: 21624435 DOI: 10.1016/j.neuroscience.2011.05.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Revised: 04/26/2011] [Accepted: 05/07/2011] [Indexed: 01/18/2023]
Abstract
The pathogenesis of neurodevelopmental disorders such as autism is believed to be influenced by interactions between genetic and environmental factors, and appropriate animal models are needed to assess the influence of such factors on relevant neurodevelopmental phenotypes. A set of inbred mouse strains (Atchley strains) including A12 (E+L0) and A22 (E-L0) were generated by age-specific restricted index selection from a baseline random-bred ICR mouse population obtained from Harlan Sprague-Dawley [Atchley et al. (1997) Genetics 146(2):629-640; Indianapolis, IN, USA). As compared with the A22 strain, A12 mice had significantly increased early (P0-P10) body weight gain with minimal changes in late (P28-P56) body weight gain. We found that these strains also differed in brain weight, brain volume, cell proliferation, and FGF-2 levels in certain brain regions. Specifically, brain weight and volume were significantly greater in A12 mice than that in A22 mice at P10 and P28. Quantitative analysis of bromodeoxyuridine (BrdU) labeling of proliferating cells showed that the number of BrdU-positive cells in the A12 strain were significantly greater in the frontal cortex and lesser in the dentate gyrus than that in the A22 strain at P28. Western blot revealed that fibroblast growth factors-2 (FGF-2), but not brain-derived neurotrophic factor (BDNF), expression was significantly increased in the frontal cortex of A12 strain at P28. Also, A12 mice exhibited decreased intra-strain social interaction and increased repetitive stereotyped behaviors at P28. Our study suggests that A12 mice may partially mimic the anatomic and behavioral traits of patients with neurodevelopmental disorders such as autism spectrum disorders, and therefore may yield insights into the developmental mechanisms involved in their pathogenesis.
Collapse
Affiliation(s)
- L Meng
- Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | | | | | | | | | | | | |
Collapse
|
247
|
Chen J, Zhou X, Snyder GJ, Uher C, Chen N, Wen Z, Jin J, Dong H, Qiu P, Zhou Y, Shi X, Chen L. Direct tuning of electrical properties in nano-structured Bi2Se0.3Te2.7 by reversible electrochemical lithium reactions. Chem Commun (Camb) 2011; 47:12173-5. [DOI: 10.1039/c1cc15498b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
248
|
Dong X, Ko KH, Chow J, Tuo B, Barrett KE, Dong H. Expression of acid-sensing ion channels in intestinal epithelial cells and their role in the regulation of duodenal mucosal bicarbonate secretion. Acta Physiol (Oxf) 2011; 201:97-107. [PMID: 20969730 DOI: 10.1111/j.1748-1716.2010.02207.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
AIMS As little is currently known about acid-sensing ion channels (ASICs) in intestinal epithelial cells, the aims of the present study were to investigate the expression and function of ASICs in intestinal epithelial cells, particularly their physiological role in the acid-stimulated duodenal mucosal bicarbonate secretion (DMBS). METHODS RT-PCR and digital Ca²(+) imaging were used to determine the expression and function of ASICs in HT29 cells and SCBN cells, intestinal epithelial crypt cell lines. The acid-stimulated DMBS was measured in C57 black mice in vivo to study the role of ASICs in this physiological process. RESULTS ASIC1a mRNA expression was detected in the duodenal mucosa stripped from mice and epithelial cell lines, in which cytoplasmic free Ca²(+) ([Ca²(+) ](cyt)) in response to extracellular acidosis was also increased. In Ca²(+) -containing solutions, acidosis (pH 6.0-5.0) raised [Ca²(+) ](cyt) in both HT29 cells and SCBN cells in a similar pH-dependent manner. Acidosis-induced increase in [Ca²(+) ](cyt) was markedly inhibited by amiloride (an ASICs blocker), SK&F96365 (a blocker for non-selective cation channels), or in Ca²(+) -free solutions; but was abolished by amiloride in Ca²(+) -free solutions. However, acidosis-induced increase in [Ca²(+) ](cyt) was slightly affected by U73122 (a PLC inhibitor), or nifedipine (a voltage-gated Ca²(+) channel blocker). After acidosis raised [Ca²(+) ](cyt) , stimulation of purinergic receptors with ATP further increased [Ca²(+) ](cyt) , but acidosis-induced increase in [Ca²(+) ](cyt) was not altered by suramin. Moreover, acid-stimulated murine DMBS was significantly attenuated by amiloride. CONCLUSION Therefore, ASICs are functionally expressed in intestinal epithelial cells, and may play a role in acid-stimulated DMBS through a Ca²(+) signalling pathway.
Collapse
Affiliation(s)
- X Dong
- Department of Medicine, University of California, San Diego, USA
| | | | | | | | | | | |
Collapse
|
249
|
Peng B, Lu Z, Dong H, Chu H. P23-9 Clinical and electrophysiological studies of botulinum toxin A for hemifacial spasm accompanied by auricular symptoms. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60984-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
250
|
Kaklamani G, Mehrban N, Chen J, Bowen J, Dong H, Grover L, Stamboulis A. Effect of plasma surface modification on the biocompatibility of UHMWPE. Biomed Mater 2010; 5:054102. [PMID: 20876959 DOI: 10.1088/1748-6041/5/5/054102] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
In this paper active screen plasma nitriding (ASPN) is used to chemically modify the surface of UHMWPE. This is an unexplored and new area of research. ASPN allows the homogeneous treatment of any shape or surface at low temperature; therefore, it was thought that ASPN would be an effective technique to modify organic polymer surfaces. ASPN experiments were carried out at 120 °C using a dc plasma nitriding unit with a 25% N(2) and 75% H(2) atmosphere at 2.5 mbar of pressure. UHMWPE samples treated for different time periods were characterized by nanoindentation, FTIR, XPS, interferometry and SEM. A 3T3 fibroblast cell line was used for in vitro cell culture experiments. Nanoindentation of UHMWPE showed that hardness and elastic modulus increased with ASPN treatment compared to the untreated material. FTIR spectra did not show significant differences between the untreated and treated samples; however, some changes were observed at 30 min of treatment in the range of 1500-1700 cm(-1) associated mainly with the presence of N-H groups. XPS studies showed that nitrogen was present on the surface and its amount increased with treatment time. Interferometry showed that no significant changes were observed on the surfaces after the treatment. Finally, cell culture experiments and SEM showed that fibroblasts attached and proliferated to a greater extent on the plasma-treated surfaces leading to the conclusion that ASPN surface treatment can potentially significantly improve the biocompatibility behaviour of polymeric materials.
Collapse
Affiliation(s)
- G Kaklamani
- School of Metallurgy and Materials, College of Engineering and Physical Sciences, University of Birmingham, Edgbaston, Birmingham B152TT, UK
| | | | | | | | | | | | | |
Collapse
|