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Sun T, Han Y, Jiang ZQ, Zhang SJ, Lou FY, Zheng XL, Zhang T, Li XX, Li L, Dong XH, Sun JW. [Application of modified brain protection double-lumen drainage tube in external drainage of chronic subdural hematoma]. Zhonghua Yi Xue Za Zhi 2018; 98:3681-3685. [PMID: 30526779 DOI: 10.3760/cma.j.issn.0376-2491.2018.45.010] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To compare the clinical effects of modified double-lumen drainage tube and traditional silicone tube in external drainage of chronic subdural hematoma. Methods: Selected 49 patients suffering from chronic subdural hematoma hospitalized in the Department of Neurosurgery, the First Affiliated Hospital of Bengbu Medical College between July 2016 and June 2018 who underwent external drainage, and divided them randomly into experimental groups (using modified brain protection double lumen drainage tube in 23 cases) and control group (using traditional silicone drainage tube in 26 cases). Comparison of postoperative hematoma residual volume, the tube indwelling time, the numbers of drainage tube contact with brain tissue and arachnoid membrane, the numbers of infections, the numbers of postoperative epilepsy cases, and changes in Modified Rankin Scale scores between the two groups. Results: At the time of extubation, the residual amount of hematoma in the experimental group was (13±7) ml, and that in the control group was (17±8) ml. There was no significantly statistical difference in the residual amount of hematoma between the experimental group and the control group (P>0.05). The tube indwelling time of the experimental group was (2.0±0.9) days, and that of the control group was (2.7±0.8) days. The difference between the experimental group and the control group in the drainage tube indwelling time was statistically significant (P<0.05). No cases of drainage tube contact with brain tissue and/or arachnoid membrane appeared in the experimental group, and 7 cases of drainage tube contact with brain tissue or arachnoid membrane appeared in the control group. No infection occurred in both groups. No cases of epilepsy occurred in preoperative, and there were 0 cases of epilepsy in the experimental group and 1 case in the control group in postoperative. There were significantly statistical differences in each of the two groups in the modified Rankin scale before and after surgery (P<0.001), there was no significant difference in postoperative Modified Rankin Scale scores between the two groups. Conclusion: The modified brain protection double-lumen drainage tube has good drainage effect in the external drainage of chronic subdural hematoma, and the short tube retention time, causing fewer complications. It is a safe and effective tool for treating chronic subdural hematoma, and it is worthy of clinical promotion.
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Affiliation(s)
- T Sun
- Department of Neurosurgery, the First Affiliated Hospital of Bengbu Medical College, Bengbu 233004, China
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152
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Wang XZ, Sun T, Han F. [Sleep disorders in the critically ill patients]. Zhonghua Yi Xue Za Zhi 2018; 98:3553-3555. [PMID: 30486569 DOI: 10.3760/cma.j.issn.0376-2491.2018.44.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
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153
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Li YY, Chen XH, Sun T, Hu Y, Zhou YH, Zhou YX. [The anti-cancer effect of ZR30 protein via targeting extracellular signal proteins of different cell subpopulations of glioma]. Zhonghua Zhong Liu Za Zhi 2018; 40:812-817. [PMID: 30481930 DOI: 10.3760/cma.j.issn.0253-3766.2018.11.003] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the roles and anti-cancer mechanism of artificially synthesized EGF-containing fibulin-like extracellular matrix protein (EFEMP1) derived tumor suppressor ZR30 protein in glioma (GBM). Methods: ZR30 protein were in vitro expressed using a wheat germ cell-free system. GBM cell lines (U251, U251NS, and U87) were cultured for 2-3 days in the presence or absence of ZR30 treatment. MMP-2 level was detected by gelatin zymography assay, moreover, the expression of EGFR, Notch-1 and p-Akt/Akt levels were determined by western blot. Additionally, MTT assay was used to measure ZR30's effect on the cell proliferation of U251 and U251NS cells. Furthermore, pre-mixed U251-GFP and U251NS-RFP cells (1∶9) were injected into the brain of nude mice, and then ZR30 or PBS was injected into the intra-tumor after 10 and 21 days, respectively. Then DNA was extracted from the right brain of nude mice in each group. Comparative quantitative polymerase chain reaction (CQ-PCR) was used to examine the copy numbers of human gene hSPAG16, mouse gene mSpag16, GFP and RFP. The survival status of each group of nude mice was also observed. Results: The levels of activated MMP-2 in U87 and U251 cells were lower after 10, 50 and 100 ng/ml ZR30 treatment for 2-3 days. Western blot analysis showed that ZR30 treatment reduced the expression of EGFR, Notch-1 and p-Akt/Akt in U251 cells, and inhibited Notch-1 and p-Akt/Akt expression in U251NS cells, and then decreased the response of U251 cells to EGF stimulation. Moreover, ZR30 inhibited the cell proliferation of U251 and U251NS two days after exposure. The in vivo orthotopic GBM xenografts were successfully constructed. CQ-PCR results indicated that the hSPAG16/mSpag16 ratios of mice in PBS group and ZR30 treatment groups at 180, 700, and 1 800 ng dosages were 3.67±2.82, 1.18±0.97, 1.75±1.55 and 1.38±1.17, respectively, and ZR30 treatment groups showed significantly lower ratios than the PBS group (P<0.05 for all). Correspondingly, the ratios of GFP/RFP in each group were 1.97±0.80, 1.97±0.85, 1.48±0.71 and 1.73±0.77, respectively, showing no statistical significance (P>0.05 for all). When treatment was performed 10 d after cell implantation, and the median survival time of mice in PBS group and ZR30 group was 40.5 days and 59.0 days, respectively. When treatment was performed 21 d after cell implantation, the median survival time of mice in PBS group and ZR30 group was extended to 57.0 days and 74.5 days, respectively. The median survival time of ZR30 treatment groups significantly prolonged (P<0.05 for all). Conclusions: ZR30 inhibits in vitro cell growth, invasion, angiogenesis and stemness maintenance in glioma via suppressing activated MMP-2, EGFR, p-Akt/Akt and Notch-1 proteins. In vivo, ZR30 markedly increased survival of mice harboring glioma xenografts, even for only one intra-tumoral injection at the time of early tumor formation. Overall, the in vivo and in vitro experiments supported the therapeutic potential of ZR30 for GBM.
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Affiliation(s)
- Y Y Li
- Neurosurgery & Brain and Nerve Research Laboratory, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - X H Chen
- Department of Emergency Surgery, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - T Sun
- Neurosurgery & Brain and Nerve Research Laboratory, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Y Hu
- Neurosurgery & Brain and Nerve Research Laboratory, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Y H Zhou
- Neurosurgery & Brain and Nerve Research Laboratory, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Y X Zhou
- Neurosurgery & Brain and Nerve Research Laboratory, the First Affiliated Hospital of Soochow University, Suzhou 215006, China
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154
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Qiao X, Sun T, Tang Q, Zhou S. Synthesis of polystyrene@silica@organosilica hierarchical hybrid particles through seeded emulsion polymerization. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2018.09.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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155
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Zhang Q, Xu B, Zhang Q, Sun T, Li W, Teng Y, Hu X, Bondarenko I, Adamchuk H, Zhang L, Trukhin D, Wang S, Zheng H, Tong Z, Zhang X, Liu E, Jiang W, Liu S, Luk A. Global clinical trials validating bioequivalence with China-manufactured trastuzumab biosimilar, HLX02, and trastuzumab. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy428.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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156
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Jiang Z, Li W, Hu X, Zhang Q, Sun T, Cui S, Wang S, Ouyang Q, Yin Y, Geng C, Tong Z, Cheng Y, Pan Y, Sun Y, Wang H, Ouyang T, Gu K, Feng J, Wang X. Phase III trial of chidamide, a subtype-selective histone deacetylase (HDAC) inhibitor, in combination with exemestane in patients with hormone receptor-positive advanced breast cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy424.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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157
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Stern J, Sun T, Mao J, Sedrakayn A, Meltzer A. A Decade of EVAR in New York State: Volumes, Outcomes, and Implications for the Dissemination of Endovascular Technology. J Vasc Surg 2018. [DOI: 10.1016/j.jvs.2018.07.017] [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: 10/28/2022]
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158
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Sun T, Liu F, Tang P, Qiu F, Yang Y. Construction of Rod-Forming Single Network Mesophases in Rod–Coil Diblock Copolymers via Inversely Designed Phase Transition Pathways. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00773] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tongjie Sun
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Faqiang Liu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Ping Tang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Feng Qiu
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
| | - Yuliang Yang
- State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, Fudan University, Shanghai 200433, China
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159
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Wang W, Meng YT, Song YF, Sun T, Xu M, Shao Q, Zhang YJ, Li JB. [Comparation study of incidental irradiation dose to the internal mammary chain during postmastectomy radiotherapy for patients treated with different irradiation techniques]. Zhonghua Zhong Liu Za Zhi 2018; 40:335-340. [PMID: 29860759 DOI: 10.3760/cma.j.issn.0253-3766.2018.05.004] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluated the unplanned coverage dose to the internal mammary chain (IMC) in patient treated with postmastectomy radiotherapy (PMRT). Methods: One hundred and thirty eight patients with breast cancer receiving radiotherapy (RT) in our hospital were retrospectively analyzed. Patients were divided into three groups: three-dimensional conformal radiotherapy (3D-CRT) group, forward intensity-modulated radiotherapy (F-IMRT) group and inverse IMRT (I-IMRT) group. The IMC were contoured according to Radiation Therapy Oncology Group (RTOG) consensus, and were not include into the planning target volume (PTV). The incidental irradiation dose to IMC among the three groups and the first three intercostal spaces IMC (ICS-IMC 1-3) were all compared, and explored the relationship between the mean doses (Dmean) of IMC and the OARs (ipsilateral lung and heart). Results: The dose delivered to IMC showed no difference in CRT, F-IMRT and I-IMRT(33.80 Gy, 29.65 Gy and 32.95 Gy). And 10.42%, 2.04%, and 9.76% patients achieved ≥45 Gy when treated with CRT, F-IMRT and I-IMRT. For the IMC dose in the first three intercostal spaces (ICS1-3), there was no difference to the three treatment plannings. The Dmean, V(20), V(30), V(40) and V(50) of the ICS-IMC2 and ICS-IMC3 were all obviously superior than ICS-IMC1 for all these three plannings. Moderate positive correlation was founded between Dmean for IMC and Dmean for heart for left breast cancer patients underwent CRT (r=0.338, P=0.01). Whereas for F-IMRT and I-IMRT groups, positive correlation were founded between Dmean for IMC and Dmean and V(20) for ipsilateral lung for all patients (F-IMRT: r=0.366, P=0.010; r=0.318, P=0.026; I-IMRT: r=0.427, P=0.005; r=0.411, P=0.008). Conclusions: In 3D-CRT, F-IMRT and I-IMRT planning methods, partial patients get IMC irradiated doses that could achieve therapeutic doses. Compared with 3D-CRT, F-IMRT and I-IMRT further reduced the dose of irradiated organs. However, there is no difference in the dose coverage of IMC for the three planned approaches when the IMC made an unplanned target.
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Affiliation(s)
- W Wang
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Jinan 250117, China
| | - Y T Meng
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Jinan 250117, China
| | - Y F Song
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Jinan 250117, China
| | - T Sun
- Department of Medical Physics, Shandong Cancer Hospital Affiliated to Shandong University, Jinan 250117, China
| | - M Xu
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Jinan 250117, China
| | - Q Shao
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Jinan 250117, China
| | - Y J Zhang
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Jinan 250117, China
| | - J B Li
- Department of Radiation Oncology, Shandong Cancer Hospital Affiliated to Shandong University, Jinan 250117, China
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160
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Cai J, Li W, Sun T, Li X, Luo E, Jing D. Pulsed electromagnetic fields preserve bone architecture and mechanical properties and stimulate porous implant osseointegration by promoting bone anabolism in type 1 diabetic rabbits. Osteoporos Int 2018. [PMID: 29523929 DOI: 10.1007/s00198-018-4392-1] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
UNLABELLED The effects of exogenous pulsed electromagnetic field (PEMF) stimulation on T1DM-associated osteopathy were investigated in alloxan-treated rabbits. We found that PEMF improved bone architecture, mechanical properties, and porous titanium (pTi) osseointegration by promoting bone anabolism through a canonical Wnt/β-catenin signaling-associated mechanism, and revealed the clinical potential of PEMF stimulation for the treatment of T1DM-associated bone complications. INTRODUCTION Type 1 diabetes mellitus (T1DM) is associated with deteriorated bone architecture and impaired osseous healing potential; nonetheless, effective methods for resisting T1DM-associated osteopenia/osteoporosis and promoting bone defect/fracture healing are still lacking. PEMF, as a safe and noninvasive method, have proven to be effective for promoting osteogenesis, whereas the potential effects of PEMF on T1DM osteopathy remain poorly understood. METHODS We herein investigated the effects of PEMF stimulation on bone architecture, mechanical properties, bone turnover, and its potential molecular mechanisms in alloxan-treated diabetic rabbits. We also developed novel nontoxic Ti2448 pTi implants with closer elastic modulus with natural bone and investigated the impacts of PEMF on pTi osseointegration for T1DM bone-defect repair. RESULTS The deteriorations of cancellous and cortical bone architecture and tissue-level mechanical strength were attenuated by 8-week PEMF stimulation. PEMF also promoted osseointegration and stimulated more adequate bone ingrowths into the pore spaces of pTi in T1DM long-bone defects. Moreover, T1DM-associated reduction of bone formation was significantly attenuated by PEMF, whereas PEMF exerted no impacts on bone resorption. We also found PEMF-induced activation of osteoblastogenesis-related Wnt/β-catenin signaling in T1DM skeletons, but PEMF did not alter osteoclastogenesis-associated RANKL/RANK signaling gene expression. CONCLUSION We reveal that PEMF improved bone architecture, mechanical properties, and pTi osseointegration by promoting bone anabolism through a canonical Wnt/β-catenin signaling-associated mechanism. This study enriches our basic knowledge for understanding skeletal sensitivity in response to external electromagnetic signals, and also opens new treatment alternatives for T1DM-associated osteopenia/osteoporosis and osseous defects in an easy and highly efficient manner.
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MESH Headings
- Animals
- Biomechanical Phenomena/physiology
- Bone Diseases, Metabolic/etiology
- Bone Diseases, Metabolic/physiopathology
- Bone Diseases, Metabolic/prevention & control
- Bone Remodeling/physiology
- Bone and Bones/metabolism
- Diabetes Mellitus, Experimental/complications
- Diabetes Mellitus, Experimental/metabolism
- Diabetes Mellitus, Experimental/physiopathology
- Diabetes Mellitus, Type 1/complications
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/physiopathology
- Implants, Experimental
- Magnetic Field Therapy/methods
- Male
- Osseointegration/physiology
- Porosity
- Rabbits
- Titanium
- Wnt Signaling Pathway/physiology
- X-Ray Microtomography
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Affiliation(s)
- J Cai
- College of Basic Medicine, Shaanxi University of Chinese Medicine, Xi'an-Xianyang New Economic Zone, Xianyang, 712046, China.
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China.
| | - W Li
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China
| | - T Sun
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China
| | - X Li
- Department of Orthopedics, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - E Luo
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China
| | - D Jing
- Department of Biomedical Engineering, Fourth Military Medical University, 17 West Changle Road, Xi'an, 710032, China.
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161
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Song Y, Wang W, LI J, Sun T, QIU P, Xu M, Shao Q. EP-1290: Evaluation of incidental internal mammary chain dose coverage with different radiation techniques. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31600-1] [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]
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162
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Tian G, Liu J, Sun T, Wang X, Wang X, Hu H, Li C, Dong X, Wang D. The effects of carbon materials with different dimensionalities on the flow instabilities of LLDPE (linear low density polyethylene). POLYMER 2018. [DOI: 10.1016/j.polymer.2018.01.085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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163
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Wang F, Feng DN, Liu Y, Liu Z, Sun T. [Microsurgical treatment of temporal cavernous malformation presenting with epilepsy]. Zhonghua Yi Xue Za Zhi 2018. [PMID: 29534399 DOI: 10.3760/cma.j.issn.0376-2491.2018.09.007] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the efficacy and safety of microsurgical in the treatment of temporal lobe cerebral cavernous malformation (CCM) with epilepsy. Methods: Temporal lobe CCM patients with epilepsy admitted to our department were collected from January 2010 to September 2016. Locations of the CCM were divided into (1) lateral-lateral to the collateral sulcus; (2) mesial-mesial to the collateral sulcus. In the lateral group, patients were underwent intraoperative electrocorticography (ECoG)-guided resection of lesion and hemosiderin rim. In the medial group, a complete resection of the epileptogenic zone was performed in anterior temporal lobe and hippocampus and (or) amygdala according to lesion and hemosiderin rim. The follow-up period in all patients was at least 1 year. The outcome of epilepsy treatment was evaluated according to the standard Engel scale. Results: Eight patients belong to the lateral group, including 2 males and 6 females, mean age at epilepsy surgery was 35 years old, 100% of patients achieved Engel class Ⅰ the last follow up. The mesial group had 7 patients, including 4 males and 3 females, mean age at epilepsy surgery was 52 years old, 71.8% of the patients were Engel Class Ⅰ, 14% were Class Ⅱ, and 14% were Class Ⅲ. The patient who was Engel Class Ⅲ had a posterior temporal venous infarction due to injured the developmental venous anomalies (DVAs). Conclusions: CCM Patients with epilepsy could benefit greatly from complete resection of hemosiderin rim and lesion. The epilepsy prognosis were closely correlated with the location of CCM. Further research is necessary to determine therapeutic strategies of CCMs with associated DVAs.
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Affiliation(s)
- F Wang
- Department of Neurosurgery, the General Hospital of Ningxia Medical University, Yinchuan 750004, China
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164
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Xiao D, Duan X, Zhang M, Sun T, Sun X, Li F, Liu N, Zhang J, Hou C, Wang D. Changes in nitric oxide levels and their relationship with callose deposition during the interaction between soybean and Soybean mosaic virus. Plant Biol (Stuttg) 2018; 20:318-326. [PMID: 29125664 DOI: 10.1111/plb.12663] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 11/06/2017] [Indexed: 06/07/2023]
Abstract
The present study aimed to investigate changes in nitric oxide (NO) level and its relationship with callose deposition during the interaction between soybean and Soybean mosaic virus (SMV). Soybean cv. 'Jidou 7' and SMV strains N3 and SC-8 were used to constitute incompatible and compatible combinations. Intracellular NO was labelled with the NO-specific fluorescence probe DAF-FM DA. Confocal laser scanning microscopy (CLSM) was then used to observe changes in NO production during SMV infection-induced defence responses in soybean. The results showed NO fluorescence increased rapidly at 2-72 h post-inoculation, peaked at 72 h and then decreased in the incompatible combination. However, in the compatible combination, extremely weak NO fluorescence appeared in the early stage (2-24 h) post-inoculation, but was not observed thereafter. Injections of the NO scavenger c-PTIO prior to inoculation postponed the onset of NO production to 48 or 72 h post-inoculation. The same occurred when injections of NR or NOS inhibitors were applied prior to inoculation. The observation of callose fluorescence in the incompatible combination revealed that either the elimination or reduction of NO in the early stage led to a delay in callose formation, enabling the virus to cause systemic infection. Together with our previous findings, this study indicates that viral infection could induce NO production and callose deposition during the incompatible interaction between soybean and SMV. The production of NO involves NR and NOS enzymatic pathways, and NO mediates the process of callose deposition at plasmodesmata.
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Affiliation(s)
- D Xiao
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - X Duan
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
- The People's Government of Baian, Town, Xingtai, China
| | - M Zhang
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - T Sun
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - X Sun
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - F Li
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - N Liu
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - J Zhang
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - C Hou
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
| | - D Wang
- Key Laboratory of Hebei Province for Plant Physiology and Molecular Pathology, College of Life Sciences, Agricultural University of Hebei, Baoding, Hebei Province, China
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Yang L, Li HY, Wang PW, Wu SY, Guo GQ, Liao B, Guo QL, Fan XQ, Huang P, Lou HB, Guo FM, Zeng QS, Sun T, Ren Y, Chen LY. Structural responses of metallic glasses under neutron irradiation. Sci Rep 2017; 7:16739. [PMID: 29196681 PMCID: PMC5711955 DOI: 10.1038/s41598-017-17099-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 10/16/2017] [Accepted: 11/20/2017] [Indexed: 11/29/2022] Open
Abstract
Seeking nuclear materials that possess a high resistance to particle irradiation damage is a long-standing issue. Permanent defects, induced by irradiation, are primary structural changes, the accumulation of which will lead to structural damage and performance degradation in crystalline materials served in nuclear plants. In this work, structural responses of neutron irradiation in metallic glasses (MGs) have been investigated by making a series of experimental measurements, coupled with simulations in ZrCu amorphous alloys. It is found that, compared with crystalline alloys, MGs have some specific structural responses to neutron irradiation. Although neutron irradiation can induce transient vacancy-like defects in MGs, they are fully annihilated after structural relaxation by rearrangement of free volumes. In addition, the rearrangement of free volumes depends strongly on constituent elements. In particular, the change in free volumes occurs around the Zr atoms, rather than the Cu centers. This implies that there is a feasible strategy for identifying glassy materials with high structural stability against neutron irradiation by tailoring the microstructures, the systems, or the compositions in alloys. This work will shed light on the development of materials with high irradiation resistance.
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Affiliation(s)
- L Yang
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China.
| | - H Y Li
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China
| | - P W Wang
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China
| | - S Y Wu
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China
| | - G Q Guo
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China
| | - B Liao
- College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, P.R. China
| | - Q L Guo
- Department of Mechanical & Aerospace Engineering, Missouri University of Science & Technology, Rolla, MO, 65409, USA
| | - X Q Fan
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, P.R. China
| | - P Huang
- Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, P.R. China
| | - H B Lou
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), 1690 Cailun Road, Pudong, Shanghai, 201203, P.R. China
| | - F M Guo
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - Q S Zeng
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), 1690 Cailun Road, Pudong, Shanghai, 201203, P.R. China
| | - T Sun
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - Y Ren
- Advanced Photon Source, Argonne National Laboratory, Lemont, Illinois, 60439, USA
| | - L Y Chen
- Department of Mechanical & Aerospace Engineering, Missouri University of Science & Technology, Rolla, MO, 65409, USA
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166
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Ren Q, Cai M, Zhang K, Ren W, Su Z, Yang T, Sun T, Wang J. Effects of bone morphogenetic protein-2 (BMP-2) and vascular endothelial growth factor (VEGF) release from polylactide-poly (ethylene glycol)-polylactide (PELA) microcapsule-based scaffolds on bone. ACTA ACUST UNITED AC 2017; 51:e6520. [PMID: 29211249 PMCID: PMC5711005 DOI: 10.1590/1414-431x20176520] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [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: 03/29/2017] [Accepted: 08/31/2017] [Indexed: 01/11/2023]
Abstract
Multiple growth factors can be administered to mimic the natural process of bone healing in bone tissue engineering. We investigated the effects of sequential release of bone morphogenetic protein-2 (BMP-2) and vascular endothelial growth factor (VEGF) from polylactide-poly (ethylene glycol)-polylactide (PELA) microcapsule-based scaffolds on bone regeneration. To improve the double emulsion/solvent evaporation technique, VEGF was encapsulated in PELA microcapsules, to which BMP-2 was attached. The scaffold (BMP-2/PELA/VEGF) was then fused to these microcapsules using the dichloromethane vapor method. The bioactivity of the released BMP-2 and VEGF was then quantified in rat mesenchymal stem cells (rMSCs). Immunoblotting analysis showed that BMP-2/PELA/VEG promoted the differentiation of rMSCs into osteoblasts via the MAPK and Wnt pathways. Osteoblast differentiation was assessed through alkaline phosphatase expression. When compared with simple BMP-2 plus VEGF group and pure PELA group, osteoblast differentiation in BMP-2/PELA/VEGF group significantly increased. An MTT assay indicated that BMP-2-loaded PELA scaffolds had no adverse effects on cell activity. BMP-2/PELA/VEG promoted the differentiation of rMSCs into osteoblast via the ERK1/2 and Wnt pathways. Our findings indicate that the sequential release of BMP-2 and VEGF from PELA microcapsule-based scaffolds is a promising approach for the treatment of bone defects.
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Affiliation(s)
- Q Ren
- Emergency Department, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - M Cai
- Department of Obstetrics and Gynecology, First Affiliated Hospital of Baotou Medical College, Baotou, Inner Mongolia, China
| | - K Zhang
- Emergency Department, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - W Ren
- Emergency Department, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - Z Su
- Emergency Department, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - T Yang
- Emergency Department, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - T Sun
- Emergency Department, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, China
| | - J Wang
- Department of Cardiothoracic Surgery, Third Affiliated Hospital of Inner Mongolia Medical University, Baotou, Inner Mongolia, China
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167
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Liu F, Sun T, Tang P, Zhang H, Qiu F. Understanding chain folding morphology of semicrystalline polymers based on a rod-coil multiblock model. Soft Matter 2017; 13:8250-8263. [PMID: 29071322 DOI: 10.1039/c7sm01892d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We employ a rod-coil multiblock molecular chain model to investigate chain folding behavior, which is a significant characteristic in semicrystalline polymers, by using the method of self-consistent field theory (SCFT). Polymer chains with different conformations in crystalline and amorphous regions are described by rigid rod chains and flexible Gaussian chains, respectively. At present, we concentrate on the thermodynamic behaviors of polymer semi-crystals after the formation of the initial lamellar crystals. A new mechanism for lamellar thickening is proposed to realize that the end of lamellar thickening depends on the crystallinity degree. In other words, it is impossible for lamellae to develop into extended-chain crystals by means of lamellar thickening if crystallinity is limited to a certain degree. We further discuss the competition between crystalline and amorphous regions and its influence on crystallization behaviors, such as the formation of double lamellae, chain tilt, the anomalies and adjacent re-entry. The synergistic influences of the driving force of crystallization, interfacial energy and crystallinity degree on chain folding behavior are also investigated when the density anomalies in amorphous regions are excluded. Our model demonstrates advantages in accurately describing the mesoscopic layered structures of semicrystalline polymers based upon a microscopic chain model and provides at least a semi-quantitative thermodynamic picture for chain folding.
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Affiliation(s)
- Faqiang Liu
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
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168
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Han H, Chen N, Jordana J, Li C, Sun T, Xia X, Zhao X, Ji C, Shen S, Yu J, Ainhoa F, Chen H, Lei C, Dang R. Genetic diversity and paternal origin of domestic donkeys. Anim Genet 2017; 48:708-711. [PMID: 28929497 DOI: 10.1111/age.12607] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/15/2017] [Indexed: 11/30/2022]
Abstract
Numerous studies have been conducted to investigate genetic diversity, origins and domestication of donkey using autosomal microsatellites and the mitochondrial genome, whereas the male-specific region of the Y chromosome of modern donkeys is largely uncharacterized. In the current study, 14 published equine Y chromosome-specific microsatellites (Y-STR) were investigated in 395 male donkey samples from China, Egypt, Spain and Peru using fluorescent labeled microsatellite markers. The results showed that seven Y-STRs-EcaYP9, EcaYM2, EcaYE2, EcaYE3, EcaYNO1, EcaYNO2 and EcaYNO4-were male specific and polymorphic, showing two to eight alleles in the donkeys studied. A total of 21 haplotypes corresponding to three haplogroups were identified, indicating three independent patrilines in domestic donkey. These markers are useful for the study the Y-chromosome diversity and population genetics of donkeys in Africa, Europe, South America and China.
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Affiliation(s)
- H Han
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - N Chen
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - J Jordana
- Facultat de Veterinària, Department Ciència Animal i dels Aliments, Universitat Autònoma de Barcelona, Barcelona, Bellaterra, 08193, Spain
| | - C Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - T Sun
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - X Xia
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - X Zhao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - C Ji
- Donge Ejiao Company Limited by Shares, Donge, Shandong, 252299, China
| | - S Shen
- Donge Ejiao Company Limited by Shares, Donge, Shandong, 252299, China
| | - J Yu
- Donge Ejiao Company Limited by Shares, Donge, Shandong, 252299, China
| | - F Ainhoa
- Facultat de Veterinària, Department Ciència Animal i dels Aliments, Universitat Autònoma de Barcelona, Barcelona, Bellaterra, 08193, Spain
| | - H Chen
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - C Lei
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - R Dang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
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169
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Sun T, Yin WL, Fang BH, Wang Q, Liang CZ, Yue ZQ. Prediction of G gene epitopes of viral hemorrhagic septicemia virus and eukaryotic expression of major antigen determinant sequence. ACTA ACUST UNITED AC 2017; 63:84-88. [PMID: 28838345 DOI: 10.14715/cmb/2017.63.7.14] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Indexed: 11/18/2022]
Abstract
This study aims to express fish Viral hemorrhagic septicemia virus (VHSV) G main antigen domain by using Bac-to-bac expression system. Using bioinformatics tools, B cell epitope of VHSV G gene was predicted, and G main antigen domain was optimized. GM gene was inserted into pFastBac1 vector, then transferred recombinant plasmid into DH10Bac to get recombinant rBacmid-GM. Obtained shuttle plasmid rBacmid-GM was transfected into sf9 cells. GM expression was examined using by PCR and western-blot. Results indicated that G main antigen domain gene of VHSV was successfully cloned and sequenced which contains 1209 bp. PCR proved that shuttle plasmid rBacmid-GM was constructed correctly. SDS-PAGE electrophoresis analysis detected a band of protein about 45kD in expression product of G gene. Obtained recombinant G protein reacted with VHSV-positive serum that was substantiated by western-blot analysis. In conclusion, the main antigen domain of VHSV G was successfully expressed in the Bac-to-Bac baculovirus system.
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Affiliation(s)
- T Sun
- Shandong Entry-exit Inspection and Quarantine Bureau, Qingdao, China
| | - W-L Yin
- Yantai Entry-exit Inspection and Quarantine Bureau, Yantai, China
| | - B-H Fang
- Shandong Entry-exit Inspection and Quarantine Bureau, Qingdao, China
| | - Q Wang
- Shandong Entry-exit Inspection and Quarantine Bureau, Qingdao, China
| | - C-Z Liang
- Shandong Entry-exit Inspection and Quarantine Bureau, Qingdao, China
| | - Z-Q Yue
- Shandong Entry-exit Inspection and Quarantine Bureau, Qingdao, China
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170
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Magnuson AD, Sun T, Yin R, Liu G, Tolba S, Shinde S, Lei XG. 379 Dietary supplementation of microalgal astaxanthin produced dose-dependent enrichments of the phytochemical and elevations of radical absorbance capacity in tissues and eggs of layer hens. J Anim Sci 2017. [DOI: 10.2527/asasann.2017.379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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171
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Affiliation(s)
- Tongjie Sun
- State Key Laboratory of Molecular Engineering of Polymers; Collaborative Innovation Center of Polymers and Polymer Composite Materials; Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Ping Tang
- State Key Laboratory of Molecular Engineering of Polymers; Collaborative Innovation Center of Polymers and Polymer Composite Materials; Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Feng Qiu
- State Key Laboratory of Molecular Engineering of Polymers; Collaborative Innovation Center of Polymers and Polymer Composite Materials; Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Yuliang Yang
- State Key Laboratory of Molecular Engineering of Polymers; Collaborative Innovation Center of Polymers and Polymer Composite Materials; Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - An-Chang Shi
- Department of Physics and Astronomy; McMaster University; Hamilton Ontario L8S 4M1 Canada
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172
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Sun T, Tang P, Qiu F, Yang Y, Shi AC. Formation of Single Gyroid Nanostructure by Order-Order Phase Transition Path in ABC Triblock Terpolymers. MACROMOL THEOR SIMUL 2017. [DOI: 10.1002/mats.201700023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Tongjie Sun
- State Key Laboratory of Molecular Engineering of Polymers; Collaborative Innovation Center of Polymers and Polymer Composite Materials; Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Ping Tang
- State Key Laboratory of Molecular Engineering of Polymers; Collaborative Innovation Center of Polymers and Polymer Composite Materials; Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Feng Qiu
- State Key Laboratory of Molecular Engineering of Polymers; Collaborative Innovation Center of Polymers and Polymer Composite Materials; Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - Yuliang Yang
- State Key Laboratory of Molecular Engineering of Polymers; Collaborative Innovation Center of Polymers and Polymer Composite Materials; Department of Macromolecular Science; Fudan University; Shanghai 200433 China
| | - An-Chang Shi
- Department of Physics and Astronomy; McMaster University; Hamilton Ontario L8S 4M1 Canada
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173
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Williams J, Zhou F, Sun T, Tao Z, Chang K, Makino K, Berz M, Duxbury PM, Ruan CY. Active control of bright electron beams with RF optics for femtosecond microscopy. Struct Dyn 2017; 4:044035. [PMID: 28868325 PMCID: PMC5565489 DOI: 10.1063/1.4999456] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 08/08/2017] [Indexed: 06/07/2023]
Abstract
A frontier challenge in implementing femtosecond electron microscopy is to gain precise optical control of intense beams to mitigate collective space charge effects for significantly improving the throughput. Here, we explore the flexible uses of an RF cavity as a longitudinal lens in a high-intensity beam column for condensing the electron beams both temporally and spectrally, relevant to the design of ultrafast electron microscopy. Through the introduction of a novel atomic grating approach for characterization of electron bunch phase space and control optics, we elucidate the principles for predicting and controlling the phase space dynamics to reach optimal compressions at various electron densities and generating conditions. We provide strategies to identify high-brightness modes, achieving ∼100 fs and ∼1 eV resolutions with 106 electrons per bunch, and establish the scaling of performance for different bunch charges. These results benchmark the sensitivity and resolution from the fundamental beam brightness perspective and also validate the adaptive optics concept to enable delicate control of the density-dependent phase space structures to optimize the performance, including delivering ultrashort, monochromatic, high-dose, or coherent electron bunches.
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Affiliation(s)
- J Williams
- Department of Physics and Astronomy, East Lansing, Michigan 48824, USA
| | - F Zhou
- Department of Physics and Astronomy, East Lansing, Michigan 48824, USA
| | - T Sun
- Department of Physics and Astronomy, East Lansing, Michigan 48824, USA
| | - Z Tao
- Department of Physics and Astronomy, East Lansing, Michigan 48824, USA
| | - K Chang
- Department of Physics and Astronomy, East Lansing, Michigan 48824, USA
| | - K Makino
- Department of Physics and Astronomy, East Lansing, Michigan 48824, USA
| | - M Berz
- Department of Physics and Astronomy, East Lansing, Michigan 48824, USA
| | - P M Duxbury
- Department of Physics and Astronomy, East Lansing, Michigan 48824, USA
| | - C-Y Ruan
- Department of Physics and Astronomy, East Lansing, Michigan 48824, USA
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174
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Sun T, Rojas OL, Li C, Ward LA, Philpott DJ, Gommerman JL. Intestinal Batf3-dependent dendritic cells are required for optimal antiviral T-cell responses in adult and neonatal mice. Mucosal Immunol 2017; 10:775-788. [PMID: 27600308 DOI: 10.1038/mi.2016.79] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2016] [Accepted: 07/27/2016] [Indexed: 02/06/2023]
Abstract
Although we know a great deal about which types of dendritic cells (DCs) promote T-cell priming in the periphery, less is known about which DC subset(s) provoke antiviral responses within the gut. Here we report that conventional Zbtb46-dependent DCs were critically required for antiviral CD8+ T-cell responses against rotavirus (RV), the major cause of childhood gastroenteritis worldwide. Furthermore, we found that in adult mice, Batf3-dependent DCs were required for generating optimal RV-specific CD8+ T-cell responses. However, in contrast to mice that lack Zbtb46-dependent DCs, a significant amount of interferon gamma-producing RV-specific CD8+ T cells were still detected in the small intestine of RV-infected adult Batf3-/- mice, suggesting the existence of compensatory cross-presentation mechanisms in the absence of Batf3-dependent DCs. In contrast to adult mice, we found that Batf3-dependent DCs were absolutely required for generating RV-specific CD8+ T-cell responses in neonates. Loss of Batf3-dependent DCs also resulted in a skewed polyclonal CD4+ T-cell response in both adult and neonatal mice upon RV infection, although local and systemic RV-specific immunoglobulin A production kinetics and titers were unimpaired. Our results provide insights that inform early-life vaccination strategies against RV infection.
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Affiliation(s)
- T Sun
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - O L Rojas
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - C Li
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - L A Ward
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - D J Philpott
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - J L Gommerman
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
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175
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Zhao J, Nian L, Kwok LY, Sun T, Zhao J. Reduction in fecal microbiota diversity and short-chain fatty acid producers in Methicillin-resistant Staphylococcus aureus infected individuals as revealed by PacBio single molecule, real-time sequencing technology. Eur J Clin Microbiol Infect Dis 2017; 36:1463-1472. [PMID: 28455781 DOI: 10.1007/s10096-017-2955-2] [Citation(s) in RCA: 16] [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] [Received: 12/27/2016] [Accepted: 02/28/2017] [Indexed: 12/30/2022]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) may cause potentially lethal infections. Increasing evidence suggests that the gut microbiota is associated with human health. Yet, whether patients with MRSA infections carry specific signatures in their fecal microbiota composition has not been determined. Thus, this study aimed to compare the fecal microbiota profile of MRSA-positive patients (n=15) with individuals without MRSA infection (n=15) by using the PacBio single molecule, real-time (SMRT) DNA sequencing system and real-time quantitative polymerase chain reaction (qPCR). Mann-Whitney tests and unweighted UniFrac principal coordinate analysis (PCoA) showed that the profile of fecal microbiota was apparently different between the two populations. Both the community richness and diversity were reduced in the MRSA-positive group (p<0.050). The genera Acinetobacter and Enterococcus were highly enriched in the MRSA-positive group, whereas less short-chain fatty acid (SCFA)-producing bacteria, including Butyricimonas, Faecalibacterium, Roseburia, Ruminococcus, Megamonas and Phascolarctobacterium, were detected in the MRSA-positive group. At species level, the species Acinetobacter baumannii and Bacteroides thetaiotaomicron were prevalent in the MRSA-positive group, whereas opposite trends were observed in 17 other species, such as Faecalibacterium prausnitzii, Lactobacillus rogosae, Megamonas rupellensis and Phascolarctobacterium faecium. Positive correlations were observed between Acinetobacter baumannii and erythrocyte sedimentation rate (ESR) (R=0.554, p=0.001), as well as hypersensitive C reactive protein (hsCRP) (R=0.406, p=0.026). Faecalibacterium prausnitzii was negatively associated with ESR (R=-0.545, p=0.002), hsCRP (R=-0.401, p=0.028) and total bile acids (TBA) (R=-0.364, p=0.048). In conclusion, the fecal microbiota structure was different between MRSA-positive and -negative patients. The increase in potential pathogens with the reduction of beneficial populations, such as SCFA-producing bacteria, in MRSA-positive patients may affect prognosis.
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Affiliation(s)
- J Zhao
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of China, Inner Mongolia Agricultural University, Hohhot, Inner Mongoli, 010018, China
| | - L Nian
- The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, 010018, China
| | - L Y Kwok
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of China, Inner Mongolia Agricultural University, Hohhot, Inner Mongoli, 010018, China
| | - T Sun
- Key Laboratory of Dairy Biotechnology and Engineering, Education Ministry of China, Inner Mongolia Agricultural University, Hohhot, Inner Mongoli, 010018, China
| | - J Zhao
- The Affiliated Hospital of Inner Mongolia Medical University, Hohhot, Inner Mongolia, 010018, China.
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176
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Lu Y, Sun T, Zhang P, Zhang P, Zhang DB, Wentzcovitch RM. Premelting hcp to bcc Transition in Beryllium. Phys Rev Lett 2017; 118:145702. [PMID: 28430478 DOI: 10.1103/physrevlett.118.145702] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Indexed: 06/07/2023]
Abstract
Beryllium (Be) is an important material with wide applications ranging from aerospace components to x-ray equipment. Yet a precise understanding of its phase diagram remains elusive. We have investigated the phase stability of Be using a recently developed hybrid free energy computation method that accounts for anharmonic effects by invoking phonon quasiparticles. We find that the hcp → bcc transition occurs near the melting curve at 0<P<11 GPa with a positive Clapeyron slope of 41±4 K/GPa, which is more consistent with recent experimental measurements. This work also demonstrates the validity of this theoretical framework based on the phonon quasiparticle to study the structural stability and phase transitions in strongly anharmonic materials.
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Affiliation(s)
- Y Lu
- Beijing Computational Science Research Center, Beijing 100193, China
| | - T Sun
- Key Laboratory of Computational Geodynamics, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ping Zhang
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - P Zhang
- Beijing Computational Science Research Center, Beijing 100193, China
- Department of Physics, University at Buffalo, State University of New York, Buffalo, New York 14260, USA
| | - D-B Zhang
- Beijing Computational Science Research Center, Beijing 100193, China
| | - R M Wentzcovitch
- Materials Science and Engineering, Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA and Department of Earth and Environmental Sciences and Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964, USA
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177
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Gabbott CM, Zhou ZX, Han GX, Sun T. A novel scale-down cell culture and imaging design for the mechanistic insight of cell colonisation within porous substrate. J Microsc 2017; 267:150-159. [PMID: 28294335 PMCID: PMC6849587 DOI: 10.1111/jmi.12555] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Revised: 02/15/2017] [Accepted: 02/18/2017] [Indexed: 12/28/2022]
Abstract
At the core of translational challenges in tissue engineering is the mechanistic understanding of the underpinning biological processes and the complex relationships among components at different levels, which is a challenging task due to the limitations of current tissue culture and assessment methodologies. Therefore, we proposed a novel scale-down strategy to deconstruct complex biomatrices into elementary building blocks, which were resembled by thin modular substrate and then evaluated separately in miniaturised bioreactors using various conventional microscopes. In order to investigate cell colonisation within porous substrate in this proof-of-concept study, TEM specimen supporters (10-30 μm thick) with fine controlled open pores (100∼600 μm) were selected as the modular porous substrate and suspended in 3D printed bioreactor systems. Noninvasive imaging of human dermal fibroblasts cultured on these free-standing substrate using optical microscopes illustrated the complicated dynamic processes used by both individual and coordinated cells to bridge and segment porous structures. Further in situ analysis via SEM and TEM provided high-quality micrographs of cell-cell and cell-scaffold interactions at microscale, depicted cytoskeletal structures in stretched and relaxed areas at nanoscale. Thus this novel scaled-down design was able to improve our mechanistic understanding of tissue formation not only at single- and multiple-cell levels, but also at micro- and nanoscales, which could be difficult to obtain using other methods.
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Affiliation(s)
- C M Gabbott
- Centre for Biological Engineering, Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough, UK
| | - Z X Zhou
- Department of Materials, Loughborough University, Epinal Way, Loughborough, UK
| | - G X Han
- Department of Biological Sciences, Xi'an JiaoTong-Liverpool University, Suzhou, Jiangsu, P. R. China
| | - T Sun
- Centre for Biological Engineering, Department of Chemical Engineering, Loughborough University, Epinal Way, Loughborough, UK
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178
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Zhang P, Wang H, Cao H, Xu X, Sun T. [Inhibitory effect of insulin-like growth factor binding protein-related protein 1 on retinal angiogenesis via ERK signaling pathway]. Zhonghua Yan Ke Za Zhi 2017; 53:207-211. [PMID: 28316197 DOI: 10.3760/cma.j.issn.0412-4081.2017.03.012] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Objective: To explore the inhibitory effect of insulin-like growth factor binding protein-related protein 1 (IGFBP-rP1), a novel anti-angiogenic factor, on retinal angiogenesis and its underlying molecular mechanisms. Methods: Experimental study. C57BL/6J mice were classified into three groups: control group (n=24), oxygen-induced retinopathy (OIR) non-intervention group (n=24) and OIR intervention group (n=72). The OIR mouse model was established using improved Smith's methods (n= 96). Twelve-day-old mice in the OIR intervention group were randomly assigned into three groups receiving intravitreal injection of recombinant mouse IGFBP-rP1 (50 μg/L, 100 μg/L and 200 μg/L, respectively). Five days later, the proliferative neovascular responses were estimated by quantifying the new vessel area relative to the total retinal area in flattening retinas stained by high molecular FITC-Dextran and counting the number of neovascular cell nuclei breaking through the internal limiting membrane (ILM) in cross-sections. Retinal phosphor-ERK1/2 (p-ERK1/2), ERK1/2 and vascular endothelial growth factor (VEGF) protein expression was assessed by Western blot. Results: In the fluorescence angiograms, irregular neovascularization and fluorescence leakage were observed in the OIR model. In the OIR non-intervention group, the expression of p-ERK1/2 and VEGF was significantly up-regulated in comparison with the control group (t=100.068, P=0.000. t=6.526, P=0.003). The area ratios of new retinal vessels and the number of neovascular cell nuclei in mice receiving intravitreal injection of recombinant mouse IGFBP-rP1 both decreased significantly (F=1920, P=0.000. F=852.387, P=0.000), following the down-regulation of retinal p-ERK1/2 protein expression (F=859.587, P=0.000) and VEGF protein expression (F=24.301, P= 0.000) in a dose-dependent manner (P<0.05). There was no significant difference in ERK1/2 protein expression (P>0.05). Conclusions: IGFBP-rP1 inhibits retinal angiogenesis by blocking ERK signaling pathway and down-regulating VEGF expression. This highlights the potential importance of IGFBP-rP1 serving as a target of gene therapy for retinal neovascularization. (Chin J Ophthalmol, 2017, 53: 207-211).
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Affiliation(s)
- P Zhang
- Department of Ophthalmology, Shanghai General Hospital, Shanghai JiaoTong University; Shanghai Key Laboratory of Fundus Disease; Shanghai Engineering Center for Visual Science and Photomedicine, Shanghai 200080, China
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179
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Li J, Zhang H, Wang S, Wang Y, Wang X, Wang H, Feng J, Zhang Q, Sun T, Jiang Z. Disparities of trastuzumab use in resources limited or abundant regions and its survival benefit on HER2 positive breast cancer: a real world research from China. Breast 2017. [DOI: 10.1016/s0960-9776(17)30196-0] [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: 10/20/2022] Open
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180
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Affiliation(s)
- K. Chen
- The Second Research Institute of Civil Aviation Administration of China; Chengdu Sichuan 610041 China
| | - T. Sun
- School of Chemistry and Material Science; Sichuan Normal University; Chengdu Sichuan 610068 China
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181
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Sun T, Tang P, Qiu F, Shi AC. Emergence of ordered network mesophases in kinetic pathways of order-order transition for linear ABC triblock terpolymers. Soft Matter 2016; 12:9769-9785. [PMID: 27896358 DOI: 10.1039/c6sm02418a] [Citation(s) in RCA: 4] [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: 06/06/2023]
Abstract
Applying the string method to the self-consistent field theory (SCFT) of ABC linear triblock copolymers, we developed a new strategy to design kinetic pathways for the formation of stable or metastable network mesophases in order-order transition (OOT) processes. The design principle regarding the kinetic pathways between distinct mesophases is based on the matching relationships of both domain spacing and dominant Fourier components of the density distributions. The results suggest that complex ordered network mesophases, such as alternating diamond (DA) and alternating plumber's nightmare (PA) could be obtained in kinetic pathways between simple phases covering lamellae, cylinders and spheres. By virtue of the minimal free energy pathway (MEP) obtained, we could acquire the epitaxial relationship and phase transition mechanism. Furthermore, we managed to regulate the MEP by changing the block composition to adjust packing frustration. Two new metastable networks, core-shell five-pronged and six-pronged morphologies, were found in the kinetic pathways, further demonstrating the regulating mechanism. The results will contribute to a better understanding of the kinetic relationship between simple phases and complex networks, thus providing a platform for soft materials design via the OOT route and guiding experimental procedures to fabricate ordered network mesophases.
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Affiliation(s)
- Tongjie Sun
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
| | - Ping Tang
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
| | - Feng Qiu
- State Key Laboratory of Molecular Engineering of Polymers, Collaborative Innovation Center of Polymers and Polymer Composite Materials, Department of Macromolecular Science, Fudan University, Shanghai 200433, China.
| | - An-Chang Shi
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada L8S 4M1
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182
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Zhang X, Han H, Zhang T, Sun T, Xi Y, Chen N, Huang Y, Dang R, Lan X, Chen H, Lei C. HSFY and ZNF280BY show copy number variations within 17 water buffalo populations. Anim Genet 2016; 48:221-224. [PMID: 27739082 DOI: 10.1111/age.12514] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2016] [Indexed: 02/02/2023]
Abstract
Recent transcriptomic analysis of the bovine Y chromosome revealed abundant presence of multi-copy protein coding gene families on the male-specific region of the Y chromosome (MSY). Copy number variations (CNVs) of several MSY genes are closely related to semen quality and male reproduction in cattle. However, the CNVs of MSY genes in water buffalo are largely unknown. Therefore, this study aimed to investigate the CNVs of HSFY and ZNF280BY of 298 buffaloes from 17 populations distributed in China, Vietnam and Laos using quantitative PCR. Our results revealed that the median copy numbers of the HSFY and ZNF280BY genes were 47 (ranging from 20 to 145) and 269 (ranging from 73 to 974) respectively. In conclusion, this study indicated that HSFY and ZNF280BY showed abundant CNVs within swamp buffalo populations.
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Affiliation(s)
- X Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - H Han
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - T Zhang
- Shaanxi University of Technology, Hanzhong, Shaanxi, 723001, China
| | - T Sun
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Y Xi
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - N Chen
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Y Huang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - R Dang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - X Lan
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - H Chen
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - C Lei
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
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183
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Tao L, Sun T, Magnuson AD, Burke M, Lei XG. 0945 Defatted microalgae-mediated enrichment of n-3 polyunsaturated fatty acids in muscle of broiler chicks was not affected by supranutrition of vitamin E and(or) Se. J Anim Sci 2016. [DOI: 10.2527/jam2016-0945] [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: 11/13/2022] Open
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184
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Sun T, Magnuson AD, Tao L, Burke M, Barcus M, Lei XG. 0944 Effects of defatted microalgae on nutrient digestibility and retention in broiler chicks. J Anim Sci 2016. [DOI: 10.2527/jam2016-0944] [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: 11/13/2022] Open
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185
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Dong HL, Yuan N, Sun T, Dun AS, Hou HF. [Effects of selenium supplement on atherogenesis of ApoE-knockout mice fed high fat diet]. Zhonghua Xin Xue Guan Bing Za Zhi 2016; 44:244-9. [PMID: 26988680 DOI: 10.3760/cma.j.issn.0253-3758.2016.03.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the effects of selenium supplement on atherogenesis and endothelial function in ApoE-knockout mice fed high fat diet. METHODS ApoE-knockout mice fed with selenium-deficient and high fat diet were randomly allocated into 3 groups based on random number table including control group (not supplied with sodium selenite, n=10), low dosage selenium supplement group (supplied water with 0.1 mg/L sodium selenite, n=10) and high dosage selenium supplement group (supplied water with 0.2 mg/L sodium selenite, n=10). After 15 weeks, the following values were measured: the concentrations of selenium in heart and liver, the levels of serum lipid, the parameters of antioxidant function including activities of superoxide dismutase(SOD) and glutathion peroxidase (GSH-Px) and malondialdehyde (MDA) level in serum, the parameters of endothelial function including serum nitric oxide (NO), endothelin 1(ET-1), and vascular endothelial growth factor (VEGF) levels, and ET-1 and VEGF levels in aorta roots. The atherosclerotic lesions in aorta roots were analyzed with oil red O staining. RESULTS (1) The selenium concentrations in heart and liver were significantly higher in high dosage and low dosage selenium supplement groups compared to control group (both P<0.05). (2) The levels of triglyceride, total cholesterol, low density lipoprotein cholesterol, very low density lipoprotein cholesterol and high-density lipoprotein cholesterol were similar among groups (all P>0.05). (3) The activity levels of serum SOD were significantly higher in low dosage ((113.8±12.5)U/ml) and high dosage selenium supplement group ((152.3±11.3)U/ml) compared to control group ((90.7±10.7)U/ml, all P<0.05). The activity levels of serum GSH-Px were significantly higher in low dosage ((53.9±7.2)U/ml) and high dosage ((69.6±8.7)U/ml) selenium supplement groups than that of control group ((36.4±5.6)U/ml, all P<0.05). The serum MDA levels in low dosage ((4.73±1.05)nmol/ml) and high dosage ((4.13±1.21)nmol/ml) selenium supplement groups were significantly lower than that of control group ((5.97±1.08)nmol/ml, all P<0.05). (4) The serum NO concentrations in low dosage ((61.5±12.8)μmol/L) and high dosage ((79.0±14.6)μmol/L)selenium supplement groups were significantly higher than that of control group((42.7±9.1)μmol/L, all P<0.05). The concentrations of serum ET-1 in low dosage ((52.8±6.3)ng/L)and high dosage ((46.3±4.7)ng/L)selenium supplement groups were significantly lower than that of control group((72.2±6.3)ng/L, P<0.05). The concentrations of serum VEGF in low dosage ((97.4±16.5)ng/L)and high dosage ((83.5±22.0)ng/L)selenium supplement groups were significantly lower than that of control group((125.8±18.6)ng/L, P<0.05). The expression levels of ET-1 and VEGF in aorta roots among low dosage and high dosage selenium supplement groups were significantly lower compared to control group (all P<0.05). (5) The plaque area of aorta roots in low dosage ((0.95±0.19)×10(5) μm(2))and high dosage selenium supplement ((0.75±0.15)×10(5) μm(2)) groups were significantly smaller than that of control group((1.13±0.23)×10(5) μm(2)), and the plaque area in high dosage selenium supplement group was significantly smaller than in low dosage selenium supplement group (P<0.05). CONCLUSION Supplement of selenium can attenuate atherogenesis in ApoE-knockout mice fed high fat diet, which is possibly mediated via reducing lipid peroxidation and improving endothelial functions.
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Affiliation(s)
- H L Dong
- Department of Cardiology, Taishan Hospital of Shandong Province, Tai' an 271000, China
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186
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Guo Z, Li TP, Liu CJ, Sun T. Abstract PR021. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492431.03074.3e] [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: 11/05/2022]
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187
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Kou J, Xu S, Sun T, Sun C, Guo Y, Wang C. A study of sodium oleate adsorption on Ca2+ activated quartz surface using quartz crystal microbalance with dissipation. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.minpro.2016.06.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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188
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Xu Y, Qin L, Sun T, Wu H, He T, Yang Z, Mo Q, Liao L, Xu J. Twist1 promotes breast cancer invasion and metastasis by silencing Foxa1 expression. Oncogene 2016; 36:1157-1166. [PMID: 27524420 PMCID: PMC5311074 DOI: 10.1038/onc.2016.286] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [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: 02/24/2016] [Revised: 06/12/2016] [Accepted: 07/05/2016] [Indexed: 12/31/2022]
Abstract
The heterogeneous breast cancers can be classified into different subtypes according to their histopathological characteristics and molecular signatures. Foxa1 expression is linked with luminal breast cancer (LBC) with good prognosis, whereas Twist1 expression is associated with basal-like breast cancer (BLBC) with poor prognosis owing to its role in promoting epithelial-to-mesenchymal transition (EMT), invasiveness and metastasis. However, the regulatory and functional relationships between Twist1 and Foxa1 in breast cancer progression are unknown. In this study, we demonstrate that in the estrogen receptor (ERα)-positive LBC cells Twist1 silences Foxa1 expression, which has an essential role in relieving Foxa1-arrested migration, invasion and metastasis of breast cancer cells. Mechanistically, Twist1 binds to Foxa1 proximal promoter and recruits the NuRD transcriptional repressor complex to de-acetylate H3K9 and repress RNA polymerase II recruitment. Twist1 also silences Foxa1 promoter by inhibiting AP-1 recruitment. Twist1 expression in MCF7 cells silenced Foxa1 expression, which was concurrent with the induction of EMT, migration, invasion and metastasis of these cells. Importantly, restored Foxa1 expression in these cells largely inhibited Twist1-promoted migration, invasion and metastasis. Restored Foxa1 expression did not change the Twist1-induced mesenchymal cellular morphology and the expression of Twist1-regulated E-cadherin, β-catenin, vimentin and Slug, but it partially rescued Twist1-silenced ERα and cytokeratin 8 expression and reduced Twist1-induced integrin α5, integrin β1 and MMP9 expression. In a xenografted mouse model, restored Foxa1 also increased Twist1-repressed LBC markers and decreased Twist1-induced BLBC markers. Furthermore, Twist1 expression is negatively correlated with Foxa1 in the human breast tumors. The tumors with high Twist1 and low Foxa1 expressions are associated with poor distant metastasis-free survival. These results demonstrate that Twist1's silencing effect on Foxa1 expression is largely responsible for Twist1-induced migration, invasion and metastasis, but less responsible for Twist1-induced mesenchymal morphogenesis and expression of certain EMT markers.
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Affiliation(s)
- Y Xu
- Department of Molecular and Cellular Biology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA.,Institute of Biosciences and Technology, Texas A&M University Health Science Center, Houston, TX, USA
| | - L Qin
- Department of Molecular and Cellular Biology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - T Sun
- Department of Molecular and Cellular Biology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - H Wu
- Department of Molecular and Cellular Biology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - T He
- Institution for Cancer Medicine and College of Basic Medical Sciences, Southwest Medical University, Luzhou, China
| | - Z Yang
- Institution for Cancer Medicine and College of Basic Medical Sciences, Southwest Medical University, Luzhou, China
| | - Q Mo
- Department of Medicine-Hematology/Oncology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - L Liao
- Department of Molecular and Cellular Biology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA
| | - J Xu
- Department of Molecular and Cellular Biology, Dan L. Duncan Cancer Center, Baylor College of Medicine, Houston, TX, USA.,Institution for Cancer Medicine and College of Basic Medical Sciences, Southwest Medical University, Luzhou, China
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189
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Luo DW, Zheng Z, Wang H, Fan Y, Chen F, Sun Y, Wang WJ, Sun T, Xu X. UPP mediated Diabetic Retinopathy via ROS/PARP and NF-κB inflammatory factor pathways. Curr Mol Med 2016; 15:790-9. [PMID: 26391545 DOI: 10.2174/1566524015666150921110500] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Revised: 08/20/2015] [Accepted: 09/18/2015] [Indexed: 11/22/2022]
Abstract
Diabetic retinopathy (DR) is a leading cause of blindness in adults at working age. Human diabetic retinopathy is characterized by the basement membrane thick, pericytes loss, microaneurysms formation, retina neovascularization and vitreous hemorrhage. To investigate whether UPP activated ROS/PARP and NF-κB inflammatory factor pathways in Diabetic Retinopathy, human retinal endothelial cells (HRECs) and rats with streptozotocin-induced diabetes were used to determine the effect of UPP on ROS generation, cell apoptosis, mitochondrial membrane potential (ΔΨm) and inflammatory factor protein expression, through flow cytometry assay, immunohistochemistry, Real-time PCR, Western blot analysis and ELISA. The levels of ROS and apoptosis and the expressions of UPP (Ub and E3) and inflammatory factor protein were increased in high glucose-induced HRECs and retina of diabetic rats, while ΔΨm was decreased. The UPP inhibitor and UbshRNA could attenuate these effects through inhibiting the pathway of ROS/PARP and the expression of NF-κB inflammatory factors, and the increased UPP was a result of high glucose-induced increase of ROS generation and NF-κBp65 expression, accompanied with the decrease of ΔΨm. Clinical study showed the overexpression of UPP and detachment of epiretinal membranes in proliferative DR (PDR) patients. It has been indicated that the pathogenic effect of UPP on DR was involved in the increase of ROS generation and NF-κB expression, which associated with the ROS/PARP and NF-κB inflammatory factor pathways. Our study supports a new insight for further application of UPP inhibitor in DR treatment.
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Affiliation(s)
| | | | | | | | | | | | | | | | - X Xu
- Department of Ophthalmology, Shanghai General Hospital of Nanjing Medical University, No. 100 Haining Road, Shanghai 200080, China.
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190
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Lyu C, Xue F, Liu X, Liu W, Fu R, Sun T, Wu R, Zhang L, Li H, Zhang D, Yang R, Zhang L. Identification of mutations in the F8 and F9 gene in families with haemophilia using targeted high-throughput sequencing. Haemophilia 2016; 22:e427-34. [PMID: 27292088 DOI: 10.1111/hae.12924] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2016] [Indexed: 11/27/2022]
Abstract
INTRODUCTION At present, many methods are available for the genetic diagnosis of haemophilia, including indirect linkage analysis, direct sequencing. However, these methods are time-consuming, labourious, and limited in their application. Therefore, the development of new, more effective techniques is necessary. AIM To detect the F8 and F9 gene mutations in patients with haemophilia and their female relatives in 29 haemophilia A (HA) and 11 haemophilia B (HB) families. METHODS FVIII C and FIX:C were analyzed using one-stage method, and factor VIII and factor IX inhibitors were tested using the Bethesda method. Intron 22 and one inversions were identified using long-distance polymerase chain reaction (PCR) and standard PCR. Non-inversion mutations of the F8 and F9 gene were identified by targeted high-throughput sequencing. All mutations were verified by Sanger sequencing. RESULTS Intron 22 inversion was detected in eight HA families and intron one inversion was detected in one HA family. Apart from the inversion mutations, 20 mutations were identified in HA families, including 17 previously reported and three novel mutations: c.5724G>A (p.Trp1908*), c.6116-1_6120delGAGTGTinsTCC (p.Lys2039Ilefs*13), and c.5220-2A>C. We found a complex rearrangement in HA: intron one inversion concomitant with exon one deletion. In HB, eight recurrent mutations were detected, including six missense mutations and two nonsense mutations. CONCLUSION Targeted high-throughput sequencing is an effective technique to detect the F8 and F9 gene mutations, especially for the discovery of novel mutations. The method is highly accurate, time-saving and shows great advantage in uncovering large deletion mutations and also in distinguishing the wild-type genotype and heterozygous large deletions.
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Affiliation(s)
- C Lyu
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - F Xue
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China.
| | - X Liu
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - W Liu
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - R Fu
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - T Sun
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - R Wu
- BGI-Tianjin, Tianjin, China
| | - L Zhang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - H Li
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - D Zhang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China
| | - R Yang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China.
| | - L Zhang
- State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Disease Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China.
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191
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Lin X, Sun T, Yin Y. SU-F-T-349: Dosimetric Comparison of Three Different Simultaneous Integrated Boost Irradiation Techniques for Multiple Brain Metastases: Intensity-Modulatedradiotherapy, Hybrid Intensity-Modulated Radiotherapy and Volumetric Modulated Arc Therapy. Med Phys 2016. [DOI: 10.1118/1.4956534] [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: 11/07/2022] Open
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192
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Sun T, Greco V, Myung P. 090 Stromal re-organization in hair follicle development and cancer suppression. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.116] [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: 10/21/2022]
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193
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Fan D, Huang JW, Zeng XL, Li Y, E JC, Huang JY, Sun T, Fezzaa K, Wang Z, Luo SN. Simultaneous, single-pulse, synchrotron x-ray imaging and diffraction under gas gun loading. Rev Sci Instrum 2016; 87:053903. [PMID: 27250438 DOI: 10.1063/1.4950869] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We develop a mini gas gun system for simultaneous, single-pulse, x-ray diffraction and imaging under high strain-rate loading at the beamline 32-ID of the Advanced Photon Source. In order to increase the reciprocal space covered by a small-area detector, a conventional target chamber is split into two chambers: a narrowed measurement chamber and a relief chamber. The gas gun impact is synchronized with synchrotron x-ray pulses and high-speed cameras. Depending on a camera's capability, multiframe imaging and diffraction can be achieved. The proof-of-principle experiments are performed on single-crystal sapphire. The diffraction spots and images during impact are analyzed to quantify lattice deformation and fracture; fracture is dominated by splitting cracks followed by wing cracks, and diffraction peaks are broadened likely due to mosaic spread. Our results demonstrate the potential of such multiscale measurements for studying high strain-rate phenomena at dynamic extremes.
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Affiliation(s)
- D Fan
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
| | - J W Huang
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
| | - X L Zeng
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
| | - Y Li
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
| | - J C E
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
| | - J Y Huang
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
| | - T Sun
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - K Fezzaa
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Z Wang
- Physics Division P-25, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - S N Luo
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People's Republic of China
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194
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Huang JW, E JC, Huang JY, Sun T, Fezzaa K, Luo SN. Dynamic crystal rotation resolved by high-speed synchrotron X-ray Laue diffraction. J Synchrotron Radiat 2016; 23:712-7. [PMID: 27140150 PMCID: PMC5315007 DOI: 10.1107/s160057751600223x] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2015] [Accepted: 02/04/2016] [Indexed: 06/05/2023]
Abstract
Dynamic compression experiments are performed on single-crystal Si under split Hopkinson pressure bar loading, together with simultaneous high-speed (250-350 ns resolution) synchrotron X-ray Laue diffraction and phase-contrast imaging. A methodology is presented which determines crystal rotation parameters, i.e. instantaneous rotation axes and angles, from two unindexed Laue diffraction spots. Two-dimensional translation is obtained from dynamic imaging by a single camera. High-speed motion of crystals, including translation and rotation, can be tracked in real time via simultaneous imaging and diffraction.
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Affiliation(s)
- J. W. Huang
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People’s Republic of China
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, People’s Republic of China
| | - J. C. E
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People’s Republic of China
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, People’s Republic of China
| | - J. Y. Huang
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People’s Republic of China
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, People’s Republic of China
| | - T. Sun
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - K. Fezzaa
- Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
| | - S. N. Luo
- The Peac Institute of Multiscale Sciences, Chengdu, Sichuan 610031, People’s Republic of China
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, Southwest Jiaotong University, Chengdu, Sichuan 610031, People’s Republic of China
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195
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Jiang W, Li M, He F, Bian Z, Liu J, He Q, Wang X, Sun T, Zhu L. Dopamine D1 receptor agonist A-68930 inhibits NLRP3 inflammasome activation and protects rats from spinal cord injury-induced acute lung injury. Spinal Cord 2016; 54:951-956. [PMID: 27067657 DOI: 10.1038/sc.2016.52] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 03/08/2016] [Accepted: 03/12/2016] [Indexed: 02/07/2023]
Abstract
STUDY DESIGN Randomized experimental study. OBJECTIVES The study aimed to investigate the therapeutic efficacy and molecular mechanisms of A-68930 in a rat model of spinal cord injury (SCI)-induced acute lung injury (ALI). SETTING China. METHODS The influences of A-68930 on the pulmonary edema, histological changes, proinflammatory cytokines levels, myeloperoxidase (MPO) activity and NLRP3 inflammasome protein expression were estimated. RESULTS SCI significantly promoted NLRP3 inflammasome activation, increased proinflammatory cytokine productions and MPO activity, and induced pulmonary edema and tissue damage in the SCI group as compared with the control group. A-68930 administration significantly inhibited NLRP3 inflammasome activation and reduced inflammatory cytokines levels and MPO activity. Moreover, A-68930 administration attenuated pulmonary edema and histopathology. CONCLUSION Our experimental findings indicated that A-68930 exhibited a protective effect on SCI-induced ALI by the alleviations of inflammatory response with the inhibition NLRP3 inflammasome activation 72 h post injury. The present study indicated that A-68930 could be a potentially efficient therapeutic strategy for the treatment of SCI-induced ALI.
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Affiliation(s)
- W Jiang
- Department of Orthopedics, Nanjing Medical University, Affiliated Hangzhou Hospital (Hangzhou First People's Hospital), Hangzhou, China
| | - M Li
- Department of Orthopedics, Nanjing Medical University, Affiliated Hangzhou Hospital (Hangzhou First People's Hospital), Hangzhou, China
| | - F He
- Department of Orthopedics, Nanjing Medical University, Affiliated Hangzhou Hospital (Hangzhou First People's Hospital), Hangzhou, China
| | - Z Bian
- Department of Orthopedics, Nanjing Medical University, Affiliated Hangzhou Hospital (Hangzhou First People's Hospital), Hangzhou, China
| | - J Liu
- Department of Orthopaedics, General Hospital of Beijing Military Command, Beijing, China
| | - Q He
- Department of Orthopedics, Shanghai Jiao Tong University affiliated Sixth People's Hospital, Shanghai, China
| | - X Wang
- Department of Orthopedics, Nanjing Medical University, Affiliated Hangzhou Hospital (Hangzhou First People's Hospital), Hangzhou, China
| | - T Sun
- Department of Orthopaedics, General Hospital of Beijing Military Command, Beijing, China
| | - L Zhu
- Department of Orthopedics, Nanjing Medical University, Affiliated Hangzhou Hospital (Hangzhou First People's Hospital), Hangzhou, China
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196
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Sun T, Jiang ZQ, Zhang SJ, Lou FY, Zhang T, Han Y, Zheng XL. [Research on the application of "H shaped" single-tube double-lumen drainage tube in the treatment of chronic subdural hematoma]. Zhonghua Yi Xue Za Zhi 2016; 96:1044-6. [PMID: 27055799 DOI: 10.3760/cma.j.issn.0376-2491.2016.13.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To explore the effect of chronic subdural hematoma external drainage surgery using self-made "H shaped" flush type single-tube double-lumen drainage tube. METHODS There were 56 cases chosen from the First Affiliated Hospital of Bengbu Medical College between Jan 2013 and Aug 2015. These patients with unilateral chronic subdural hematoma requiring surgery to place drilling external drainage catheter were randomly divided into group A (21 cases, using self-made single-tube double lumen "H shaped" drainage tube) and group B (35 cases, traditional silicone drainage tube), then the residual liquid volume after drainage on the first day, the days that the tube stay in body and the residual fluid volume after removing the tube were compared between the two groups. RESULTS The residual liquid volume after drainage on the first day in group A was (23±15)ml, in group B was (31±15)ml. The days that the tube stay in body in group A was (2.7±1.0)d, in group B was (3.3±1.1)d, the two groups had statistical differences (P<0.05). The residual fluid volume after removing the tube in group A was (13±7) ml, in group B was (16±8)ml, but the data in these two groups had no significantly statistical differences (P>0.05). CONCLUSION The effect of self-made "H shaped" flush type single-tube double-lumen drainage tube in the drainage of chronic subdural hematoma drainage is good, with short tube stay in the body; therefore, it is a safe and effective way to treat chronic subdural hematoma, and is worthy of clinical application.
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Affiliation(s)
- T Sun
- Department of Neurosurgery, the First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, China
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Han Y, Wu Z, Wu T, Huang Y, Cheng Z, Li X, Sun T, Xie X, Zhou Y, Du Z. Tumor-suppressive function of long noncoding RNA MALAT1 in glioma cells by downregulation of MMP2 and inactivation of ERK/MAPK signaling. Cell Death Dis 2016; 7:e2123. [PMID: 26938295 PMCID: PMC4823926 DOI: 10.1038/cddis.2015.407] [Citation(s) in RCA: 176] [Impact Index Per Article: 22.0] [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: 09/05/2015] [Revised: 12/05/2015] [Accepted: 12/09/2015] [Indexed: 01/24/2023]
Abstract
Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is a type of long noncoding RNA. It is associated with metastasis and is a favorable prognostic factor for lung cancer. Recent studies have shown that MALAT1 plays an important role in other malignancies. But, little is known about the role of MALAT1 in glioma. In this study, quantitative reverse transcription PCR (qRT-PCR) was used to demonstrate that the expression of MALAT1 was lower than that in normal brain tissues. Stable RNA interference-mediated knockdown of MALAT1 in human glioma cell lines (U87 and U251) significantly promoted the invasion and proliferation of the glioma cells by in vitro assays. Conversely, overexpression of MALAT1 caused significant reduction in cell proliferation and invasion in vitro, and tumorigenicity in both subcutaneous and intracranial human glioma xenograft models. Furthermore, MALAT1-mediated tumor suppression in glioma cells may be via reduction of extracellular signal-regulated kinase/mitogen-activated protein kinase (ERK/MAPK) signaling activity and expression of matrix metalloproteinase 2 (MMP2). In conclusion, overall data demonstrated the tumor-suppressive role of MALAT1 in glioma by attenuating ERK/MAPK-mediated growth and MMP2-mediated invasiveness.
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Affiliation(s)
- Y Han
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
| | - Z Wu
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
| | - T Wu
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
| | - Y Huang
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
| | - Z Cheng
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
| | - X Li
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
| | - T Sun
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
| | - X Xie
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
| | - Y Zhou
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
| | - Z Du
- Neurosurgery & Brain and Nerve Research Laboratory, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu, PR China
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198
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Abstract
Correction for rigid object motion in helical CT can be achieved by reconstructing from a modified source-detector orbit, determined by the object motion during the scan. This ensures that all projections are consistent, but it does not guarantee that the projections are complete in the sense of being sufficient for exact reconstruction. We have previously shown with phantom measurements that motion-corrected helical CT scans can suffer from data-insufficiency, in particular for severe motions and at high pitch. To study whether such data-insufficiency artefacts could also affect the motion-corrected CT images of patients undergoing head CT scans, we used an optical motion tracking system to record the head movements of 10 healthy volunteers while they executed each of the 4 different types of motion ('no', slight, moderate and severe) for 60 s. From these data we simulated 354 motion-affected CT scans of a voxelized human head phantom and reconstructed them with and without motion correction. For each simulation, motion-corrected (MC) images were compared with the motion-free reference, by visual inspection and with quantitative similarity metrics. Motion correction improved similarity metrics in all simulations. Of the 270 simulations performed with moderate or less motion, only 2 resulted in visible residual artefacts in the MC images. The maximum range of motion in these simulations would encompass that encountered in the vast majority of clinical scans. With severe motion, residual artefacts were observed in about 60% of the simulations. We also evaluated a new method of mapping local data sufficiency based on the degree to which Tuy's condition is locally satisfied, and observed that areas with high Tuy values corresponded to the locations of residual artefacts in the MC images. We conclude that our method can provide accurate and artefact-free MC images with most types of head motion likely to be encountered in CT imaging, provided that the motion can be accurately determined.
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199
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Xu Y, Feng Z, Xu Y, Mo Q, Qin L, Sun T, Wu H, Li Y, Liao L, Xu J. Abstract P2-05-23: TWIST1 silences FOXA1 transcription to promote breast cancer progression. Cancer Res 2016. [DOI: 10.1158/1538-7445.sabcs15-p2-05-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
TWIST1 promotes epithelial-mesenchymal transition (EMT), invasion and metastasis of breast cancer cells, but the underlying mechanism is still not well understood. We generated mammary gland tumor specific Twist1 knock out mouse model and found that TWIST1 does not affect PyMT-induced mammary tumor initiation and growth but promotes tumor lung metastasis. We identified FOXA1 as a novel direct target of TWIST1 in both mouse and human breast cancer. We further found that TWIST1 inhibits FOXA1 expression through direct binding to its proximal promoter region and recruiting Mi2/nucleosome remodeling and deacetylase (Mi2/NuRD) transcriptional repressor complex. Moreover, TWIST1 also diminished transcriptional activator AP1 binding to FOXA1 promoter. TWIST1 mediated FOXA1 down-regulation is essential for promoting breast cancer migration, invasion and metastasis. FOXA1 significantly inhibits TWIST1 dependent cell migration and invasion capability of MCF7 cells through inhibiting integrin α5, β1 and MMP9 expression. Importantly, TWIST1high FOXA1low correlates with the poorest prognosis in breast cancer patients.
Citation Format: Xu Y, Feng Z, Xu Y, Mo Q, Qin L, Sun T, Wu H, Li Y, Liao L, Xu J. TWIST1 silences FOXA1 transcription to promote breast cancer progression. [abstract]. In: Proceedings of the Thirty-Eighth Annual CTRC-AACR San Antonio Breast Cancer Symposium: 2015 Dec 8-12; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2016;76(4 Suppl):Abstract nr P2-05-23.
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Affiliation(s)
- Y Xu
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
| | - Z Feng
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
| | - Y Xu
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
| | - Q Mo
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
| | - L Qin
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
| | - T Sun
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
| | - H Wu
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
| | - Y Li
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
| | - L Liao
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
| | - J Xu
- Baylor College of Medicine, Houston, TX; Texas A & M Health Science Center IBT, Houston, TX; East China Normal University, Shanghai, China; Third Military Medical University, Chongqing, China; Sichuan Medical University, Luzhou, China
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Abstract
The relationship between entrance pressure fluctuation and perturbation of the extrudates was elaborated experimentally.
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Affiliation(s)
- Haiqing Hu
- Key Laboratory of Rubber-Plastics
- Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
| | - Jie Liu
- Key Laboratory of Rubber-Plastics
- Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
| | - Tongjie Sun
- Key Laboratory of Rubber-Plastics
- Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
| | - Jian Zhao
- Key Laboratory of Rubber-Plastics
- Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
| | - Xin Wang
- Key Laboratory of Rubber-Plastics
- Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics
- School of Polymer Science and Engineering
- Qingdao University of Science and Technology
- Qingdao 266042
| | - Chaoxu Li
- CAS Key Lab of Bio-based Materials
- Qingdao Institute of Bioenergy and Bioprocess Technology
- Chinese Academy of Sciences
- Qingdao 266101
- China
| | - Xia Dong
- Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
| | - Dujin Wang
- Beijing National Laboratory for Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
- Beijing 100190
- China
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