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Luo X, Xie H, Cao J, Lu Y, Tao S, Meng Z, Pu L, Sun L, He P, Liu Z. Enhanced microwave absorption performance of Fe 3Al flakes by optimizing the carbon nanotube coatings. RSC Adv 2024; 14:10687-10696. [PMID: 38567341 PMCID: PMC10985793 DOI: 10.1039/d4ra00955j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 03/21/2024] [Indexed: 04/04/2024] Open
Abstract
Fe3Al is a good magnetic loss absorber for microwave absorption. However, due to the relatively high density and poor impedance matching ratio, the potential of Fe3Al cannot be fully released. Herein, a dielectric loss absorber of carbon nanotubes (CNTs) is coupled with Fe3Al to form Fe3Al/CNTs composite absorbers. CNTs are randomly tangled and coated on the surface of the Fe3Al flakes, forming a connecting conductive network. By carefully tuning the content of CNTs, the optimized Fe3Al/CNTs composite absorber with 1.5% of CNTs can combine both magnetic loss and dielectric loss mechanisms, thus achieving an impedance matching ratio close to 1 while keeping strong attenuation for enhanced microwave absorption. As a result, an effective absorption bandwidth (RL ≤ -10 dB) of 4.73 GHz at a thickness of 2 mm is achieved.
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Affiliation(s)
- Xixi Luo
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Hui Xie
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Jing Cao
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Yaru Lu
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University Xi'an 710072 China
| | - Shiping Tao
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Zhixing Meng
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Lingna Pu
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Liyang Sun
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Pengjia He
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
| | - Ziyan Liu
- School of Materials Engineering, Xi'an Aeronautical University Xi'an 710077 China
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Pu L, Liu H, Liu D, Zhao F, Dai X, Chen J. Novel marker for diagnosis of supracardiac total anomalous pulmonary venous connection in first trimester. Ultrasound Obstet Gynecol 2023; 61:653-655. [PMID: 36349882 DOI: 10.1002/uog.26112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 10/13/2022] [Accepted: 10/18/2022] [Indexed: 05/04/2023]
Affiliation(s)
- L Pu
- Department of Ultrasonic Medicine, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
| | - H Liu
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
- Department of Pediatric Pulmonology and Immunology, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- NHC Key Laboratory of Chronobiology (Sichuan University), Chengdu, Sichuan, China
| | - D Liu
- Department of Ultrasonic Medicine, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
| | - F Zhao
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
- Department of Radiology, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
| | - X Dai
- Department of Ultrasonic Medicine, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
| | - J Chen
- Department of Ultrasonic Medicine, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
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ZHAN Y, He X, Pu L, Zou Y, He Q, Hong D, Li G. POS-197 INVESTIGATION ON THE ACHIEVEMENT OF CKD-MBD SERUM INDICATORS OF HEMODIALYSIS PATIENTS IN SICHUAN PROVINCE. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.215] [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] Open
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ZHAN Y, He X, Pu L, Zhang Y, He Q, Hong D, Li G. POS-627 INVESTIGATION ON THE SEASONAL DISTRIBUTION OF HYPERKALEMIA IN HEMODIALYSIS PATIENT. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.660] [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: 11/27/2022] Open
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5
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Liu JY, Hua MX, Du CJ, Pu L, Xiang P, Li CS, Xiong HF, Liu XZ, Chen ZH, Xie W, Li A. The dual role of anti-viral therapy in the treatment of Coronavirus disease 2019. Eur Rev Med Pharmacol Sci 2020; 24:11939-11944. [PMID: 33275267 DOI: 10.26355/eurrev_202011_23854] [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: 11/12/2022]
Abstract
OBJECTIVE Coronavirus disease 2019 (COVID-19) has become a worldwide public health emergency; unfortunately, there is currently no treatment for improving outcomes or reducing viral-clearance times in infected patients. The aim of the present study was to evaluate the efficacy of interferon (IFN) with or without lopinavir and ritonavir as antiviral therapeutic option for treating COVID-19 infection. PATIENTS AND METHODS The present study enrolled 148 patients that received either standard care, treatment with IFN alfa-2b, or IFN alfa-2b combined with lopinavir plus ritonavir. Viral testing was performed using Reverse-Transcription Polymerase Chain Reaction (RT-PCR). RESULTS There was no significant difference in the viral-clearance time at 28 days after treatment between patients receiving standard care and those receiving anti-viral treatments. However, the average viral-clearance time of patients receiving standard care (14 days) was shorter than that for patients receiving IFN alfa-2b or IFN alfa-2b combined with lopinavir plus ritonavir (15.5 or 17.5 days) (p<0.05). Patients treated with IFN alfa-2b within five days or IFN alfa-2b combined with lopinavir plus ritonavir after three days of symptoms exhibited shorter viral-clearance times than the other groups (p<0.05). Moreover, viral-clearance times were significantly longer in patients receiving standard care or anti-viral treatment 5 days after symptoms appeared than those of patients who received these treatments within five days of symptom onset (p<0.05). CONCLUSIONS Early symptomatic treatment is most critical for maximizing amelioration of COVID-19 infection. Anti-viral treatment might have complicated effect on viral-clearance.
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Affiliation(s)
- J-Y Liu
- Department of Intensive Care Unit, Beijing Ditan Hospital, Capital Medical University, Beijing, P. R. China.
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Wang D, Wang D, Pu L, Wei G. Improved Antioxidant Capacity and Immune Function of Broiler Chickens Fed with Selenium-enriched Candida utilis. Braz J Poult Sci 2020. [DOI: 10.1590/1806-9061-2019-1047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- D Wang
- Soochow University, China
| | - D Wang
- Soochow University, China
| | - L Pu
- Soochow University, China
| | - G Wei
- Soochow University, China
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Li C, Pu L, liu R, Shi B, Shia J. Evaluation of growth trend about nasal dorsum of patients influenced by cleft types. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.049] [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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Richter U, Kronburg MB, Huo Y, Sitzy J, Pu L, Mayer J, Ulbrich S, Gaspar T, Piorkowski C. P1214From trials to clinical practice: True outcome of AF landmark trials and studies. Europace 2018. [DOI: 10.1093/europace/euy015.696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- U Richter
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - M B Kronburg
- Aarhus University Hospital, Electrophysiology, Aarhus, Denmark
| | - Y Huo
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - J Sitzy
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - L Pu
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - J Mayer
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - S Ulbrich
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - T Gaspar
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - C Piorkowski
- University Hospital Dresden, Electrophysiology, Dresden, Germany
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Huo Y, Kronborg MB, Ulbrich S, Zedda A, Mayer J, Pu L, Guo J, Richter U, Sitzy J, Gaspar T, Piorkowski C. P364Presence of low voltage zone areas is associated with lower AF recurrence in patients undergoing re-ablation with substrate modification. Europace 2018. [DOI: 10.1093/europace/euy015.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Huo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - S Ulbrich
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - A Zedda
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Guo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
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Huo Y, Kronborg MB, Ulbrich S, Zedda A, Mayer J, Pu L, Guo J, Richter U, Sitzy J, Gaspar T, Piorkowski C. P1170Freedom from AF after total left atrial isolation in patients with large areas arrhythmia substrate. Europace 2018. [DOI: 10.1093/europace/euy015.655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y Huo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - S Ulbrich
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - A Zedda
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Guo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
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Ulbrich S, Huo Y, Richter U, Mayer J, Pu L, Kronborg MB, Zedda AM, Guo J, Sitzy J, Gaspar T, Piorkowski C. P836Mechanical function after total left atrial isolation in patients with atrial fibrillation at the end stage of left atrial myopathy. Europace 2018. [DOI: 10.1093/europace/euy015.440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- S Ulbrich
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - Y Huo
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - A M Zedda
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - J Guo
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
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Huo Y, Kronborg MB, Ulbrich S, Zedda AM, Mayer J, Pu L, Guo J, Richter U, Sitzy J, Gaspar T, Piorkowski C. P840Feasibility and safety of total left atrial isolation and subsequent left atrial appendage occlusion in the patients with atrial fibrillation at the end stage of left atrial myopathy. Europace 2018. [DOI: 10.1093/europace/euy015.443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y Huo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - S Ulbrich
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - A M Zedda
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Guo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
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Richter U, Kronborg MB, Huo Y, Sitzy J, Mayer J, Ulbrich S, Pu L, Gaspar T, Piorkowski C. 48Succses of atrial fibrillation ablation in patients with paroxsysmal or persistent AF when comparing continuous with periodic discontinuous continuous follow-up. Europace 2018. [DOI: 10.1093/europace/euy015.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- U Richter
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - M B Kronborg
- Aarhus University Hospital, Electrophysiology, Aarhus, Denmark
| | - Y Huo
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - J Sitzy
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - J Mayer
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - S Ulbrich
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - L Pu
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - T Gaspar
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - C Piorkowski
- University Hospital Dresden, Electrophysiology, Dresden, Germany
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Huo Y, Kronborg MB, Sitzy J, Richter U, Mayer J, Ulbrich S, Pu L, Gaspar T, Piorkowski C. P277Changes in left atrium voltage map characteristics in patients undergoing re-ablation for atrial fibrillation. Europace 2018. [DOI: 10.1093/europace/euy015.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Huo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - S Ulbrich
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
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Xiong HF, Liu JY, Guo LM, Li CS, Tan JB, Liu YF, Sun Y, Pu L, Xiang P, Zhang M. [Clinical features and treatment of acute fatty liver of pregnancy complicated by acute liver failure]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:938-939. [PMID: 29325296 DOI: 10.3760/cma.j.issn.1007-3418.2017.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- H F Xiong
- Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China
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Ding Y, Sun C, Li J, Hu L, Li M, Liu J, Pu L, Xiong S. The Prognostic Significance of Soluble Programmed Death Ligand 1 Expression in Cancers: A Systematic Review and Meta-analysis. Scand J Immunol 2017; 86:361-367. [PMID: 28930374 DOI: 10.1111/sji.12596] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 08/12/2017] [Indexed: 12/28/2022]
Abstract
The differential expression of soluble programmed death ligand 1 (sPD-L1) has been found in some cancers; however, the correlation between sPD-L1 expression and prognosis value in tumour is still unclear. Here, we conducted a meta-analysis and systematic review to assess the prognostic value of sPD-L1 in patients with cancer. Eligible studies were searched for in the databases including PubMed, Web of Science, ScienceDirect and Wiley Online Library database. The pooled hazard ratios (HRs) with a 95% confidence interval (95%CI) were calculated to assess the prognostic significance of sPD-L1 in human cancer. Eight studies and 1102 patients with cancer were included in the final analysis, and the combined analysis indicated that a higher level of sPD-L1 was associated with worse overall survival (OS) (HR = 1.60, 95%CI: 1.21-1.99). Furthermore, statistical significance was also observed in subgroup analysis stratified by the cancer type (haematological neoplasms or non-haematological neoplasms), sample size (more or less than 100), cut-off value of sPD-L1 (more or less than 6.51 ng/ml) and ethnicity (Asian or European). The meta-analysis indicates that circulating sPD-L1 changes may serve as a useful biomarker for cancer prognosis, and higher level of sPD-L1 may also be associated with poor outcomes in patients with cancer.
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Affiliation(s)
- Y Ding
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - C Sun
- Department of Pharmacology, The Second Hospital of Anhui Medical university, Hefei, Anhui, China
| | - J Li
- Department of Emergency, The Second Hospital of Anhui Medical university, Hefei, Anhui, China
| | - L Hu
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - M Li
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - J Liu
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - L Pu
- Department of Hematology, The Third People's Hospital of Bengbu, Bengbu, Anhui, China
| | - S Xiong
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
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17
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Xue H, Bi Y, Tang Y, Hukkeri S, Li X, Pu L, Nan M, Fu G, Wang Y, Li Y. Influence of storage temperature and cultivars on T‐2 toxin and neosolaniol accumulation in apples inoculated with
Trichothecium roseum. J FOOD PROCESS PRES 2017. [DOI: 10.1111/jfpp.13424] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H. Xue
- College of ScienceGansu Agricultural UniversityLanzhou 730070 People's Republic of China
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - Y. Bi
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - Y. Tang
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - S. Hukkeri
- College of Agriculture and Bio‐ResourcesUniversity of SaskatchewanSaskatoon S7N5A8 Canada
| | - X. Li
- The School of Mathematics & PhysicsLanzhou Jiaotong UniversityLanzhou 730070 Pepole's Republic of China
| | - L. Pu
- College of ScienceGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - M. Nan
- College of ScienceGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - G. Fu
- College of ScienceGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - Yi Wang
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - Y. Li
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
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Zhang LC, Liang J, Pu L, Zhang YB, Wang LG, Liu X, Yan H, Wang LX. mRNA and protein expression levels of four candidate genes for ear size in Erhualian and Large White pigs. Genet Mol Res 2017; 16:gmr-16-02-gmr.16029252. [PMID: 28407177 DOI: 10.4238/gmr16029252] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Porcine ear size is an important characteristic for distinguishing among pig breeds. In a previous genome-wide association study of porcine ear size, LEM domain-containing 3 (LEMD3), methionine sulfoxide reductase B3 (MSRB3), high mobility group AT-hook 2 (HMGA2), and Wnt inhibitory factor 1 (WIF1) were implicated as important candidate genes for ear size. This study investigated the expression levels of four candidate genes for ear size in Erhualian and Large White pigs. Ten Erhualian pigs with large ears and eight Large White pigs with small ears at 60 days of age were examined. The mRNA expression levels of the four candidate genes were quantified by real-time polymerase chain reaction. WIF1 mRNA expression was significantly higher in Large White than in Erhualian pigs (P < 0.05), whereas the expression levels of the other three genes were not significantly different between the two breeds. The protein expression levels of the four genes were analyzed using western blot. WIF1 protein expression was significantly higher in Large White than in Erhualian pigs (P < 0.01), whereas MSRB3 protein expression was significantly higher in Erhualian than in Large White pigs (P < 0.05). There were no significant differences between the two breeds in residual protein expression. These results suggest that WIF1 is the main causal gene for ear size in pigs.
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Affiliation(s)
- L C Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China .,
| | - J Liang
- College of Animal Science and Veterinary Medicine, , , China
| | - L Pu
- Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, , , China
| | - Y B Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
| | - L G Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
| | - X Liu
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
| | - H Yan
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
| | - L X Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
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Liu Y, Fu QZ, Pu L, Song LL, Lyu GY, Liu J, Wang Z, Wang Z. [Expression and clinical significance of HMGA2 in renal carcinoma]. Zhonghua Zhong Liu Za Zhi 2017; 39:127-132. [PMID: 28219208 DOI: 10.3760/cma.j.issn.0253-3766.2017.02.010] [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 detect the high mobility group A2 (HMGA2) expression in renal carcinoma, and to explore the relationship with clinicopathological features and its significance for prognosis. Methods: 50 renal carcinoma specimens, 50 corresponding adjacent normal kidney tissue samples, and 40 benign renal tumor specimens were used in this study. The expressions of HMGA2 mRNA and protein were detected by RT-PCR, Western blot and immunohistochemical assays, and its relationship with clinicopathological features and prognosis in the renal carcinoma patients was analyzed. Results: The RT-PCR results showed that the relative expression levels of HMGA2 mRNA in the renal carcinoma, benign renal tumor tissues, and adjacent normal renal tissues were 0.84±0.23, 0.19± 0.06 and 0.08±0.04, respectively, and the expression in renal carcinoma tissue was significantly higher than those of the other 2 groups (P<0.01). The Western blot results showed that the relative expression levels of HMGA2 protein in the renal carcinoma, benign renal tumor tissues, and adjacent normal renal tissues were 0.91±0.24, 0.12±0.04 and 0.03±0.01, respectively, and the expression in renal carcinoma tissue was significantly higher than those of the other 2 groups (P<0.01). Immunohistochemical results showed that the expression of HMGA2 protein exhibited brown and tan granular, which mainly distributed in the cell nuclei. Among the 50 cases of renal carcinoma, 34 cases exhibited positive expression, with a positive rate of 68.0%. Among the 40 cases of benign tumor tissues, 3 cases had positive expression, with a positive rate of 7.5%, while among the 50 cases of adjacent normal renal tissues, there was only 1 case exhibiting positive expression of HMGA2 protein, with a positive rate of 2.0%. The protein expression of HMGA2 was significantly higher in the renal carcinoma than in the benign tumors and normal renal tissues (P=0.004). There was no statistically significant difference in the association of HMGA2 protein expressions with age, sex, tumor size and histological type (P>0.05), while significant difference did exist in the association with different statuses of TNM staging and lymph node metastasis (P<0.05). The median time to progression (TTP) in 34 HMGA2 protein-positive patients was (22.36±1.48) months and that of 16 HMGA2 protein-negative patients was (34.55±1.87) months (P<0.05). Conclusions: HMGA2 plays an important role in the tumorigenesis and development of renal carcinoma, and may be used as an important predictor for estimating the prognosis of renal carcinoma. HMGA2 might become a new diagnostic and prognostic marker for renal carcinoma.
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Affiliation(s)
- Y Liu
- Xi'an Jiaotong University Health Science Center, Xi'an, 710049, China
| | - Q Z Fu
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - L Pu
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - L L Song
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - G Y Lyu
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - J Liu
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Zhenlong Wang
- Department of Urological Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China
| | - Ziming Wang
- Department of Urological Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China
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Pu L, Zhang LC, Zhang JS, Song X, Wang LG, Liang J, Zhang YB, Liu X, Yan H, Zhang T, Yue JW, Li N, Wu QQ, Wang LX. Porcine MAP3K5 analysis: molecular cloning, characterization, tissue expression pattern, and copy number variations associated with residual feed intake. Genet Mol Res 2016; 15:gmr7998. [PMID: 27525933 DOI: 10.4238/gmr.15037998] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mitogen-activated protein kinase kinase kinase 5 (MAP3K5) is essential for apoptosis, proliferation, differentiation, and immune responses, and is a candidate marker for residual feed intake (RFI) in pig. We cloned the full-length cDNA sequence of porcine MAP3K5 by rapid-amplification of cDNA ends. The 5451-bp gene contains a 5'-untranslated region (UTR) (718 bp), a coding region (3738 bp), and a 3'-UTR (995 bp), and encodes a peptide of 1245 amino acids, which shares 97, 99, 97, 93, 91, and 84% sequence identity with cattle, sheep, human, mouse, chicken, and zebrafish MAP3K5, respectively. The deduced MAP3K5 protein sequence contains two conserved domains: a DUF4071 domain and a protein kinase domain. Phylogenetic analysis showed that porcine MAP3K5 forms a separate branch to vicugna and camel MAP3K5. Tissue expression analysis using real-time quantitative polymerase chain reaction (qRT-PCR) revealed that MAP3K5 was expressed in the heart, liver, spleen, lung, kidney, muscle, fat, pancrea, ileum, and stomach tissues. Copy number variation was detected for porcine MAP3K5 and validated by qRT-PCR. Furthermore, a significant increase in average copy number was detected in the low RFI group when compared to the high RFI group in a Duroc pig population. These results provide useful information regarding the influence of MAP3K5 on RFI in pigs.
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Affiliation(s)
- L Pu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - L C Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - J S Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - X Song
- Research Institute of Truein Agro-Pastoral Group Co., Ltd., Kaifeng, China
| | - L G Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - J Liang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Y B Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - X Liu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - H Yan
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - T Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - J W Yue
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - N Li
- Jilin Academy of Agricultural Sciences, Changchun, China
| | - Q Q Wu
- College of Animal Science Technology, Hunan Agricultural University, Changsha, China
| | - L X Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
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Liu X, Wang LG, Zhang LC, Yan H, Zhao KB, Liang J, Li N, Pu L, Zhang T, Wang LX. Molecular cloning, tissue expression pattern, and copy number variation of porcine SCUBE3. Genet Mol Res 2016; 15:gmr7010. [PMID: 26909946 DOI: 10.4238/gmr.15017010] [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: 11/03/2022]
Abstract
The signal peptide CUB EGF-like domain-containing protein 3 (SCUBE3) gene is a member of SCUBE gene family and plays important roles in bone cell biology and the determination of limb bone length. In this study, the full-length transcript of porcine SCUBE3 was cloned using reverse transcription-polymerase chain reaction and rapid amplification of cDNA ends. The full-length sequence of porcine SCUBE3 cDNA was 4131 base pairs and included 21 exons. The SCUBE3 gene contained a 2895-base pair open reading frame that encoded a peptide of 965 amino acids. Comparison of the deduced amino acid sequences of porcine SCUBE3 with those of human, mouse, zebrafish, and rat showed 96, 95, 73, and 95% identities, respectively. Porcine SCUBE3 mRNA expression levels were highest in the backfat, bone marrow, and cartilage tissues. Copy number variation was detected in porcine SCUBE3 and validated by real-time quantitative polymerase chain reaction. Different copy number variations were present in randomly selected individuals and may, therefore, be a good marker for identifying phenotypic traits. Our findings provide a basis for further investigation of the functions and regulatory mechanisms of SCUBE3 in pigs.
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Affiliation(s)
- X Liu
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - L G Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - L C Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - H Yan
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - K B Zhao
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - J Liang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - N Li
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - L Pu
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - T Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - L X Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
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Liu M, Wang C, Pu L, Liang Z. 18F-FDG pet studies correlate with the MOCA test in parkinson’s disease in a Han Chinese Cohort. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.774] [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: 10/22/2022]
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Ji L, Gao W, Wei J, Pu L, Yang J, Guo C. In Vivo Antioxidant Properties of Lotus Root and Cucumber: A Pilot Comparative Study in Aged Subjects. J Nutr Health Aging 2015; 19:765-70. [PMID: 26193861 DOI: 10.1007/s12603-015-0524-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To compare the effects of lotus root and cucumber on antioxidant function in aged subjects. DESIGN Pilot comparative study. SETTING Research setting with vegetable intervention. PARTICIPANTS Healthy aged subjects over the age of sixty. INTERVENTION 30-day supplementation of lotus root or cucumber powder. MEASUREMENTS Plasma value of ferric reducing antioxidant power assay, activity of antioxidant enzymes, contents of some antioxidants, oxidation products, hemolysis, blood mononuclear cell DNA damage and urinary excretion of 8-hydroxy-2'-deoxyguanosine were measured before and after the intervention. RESULTS Plasma glutathione peroxidase activity, contents of vitamin C, total phenolics were significantly increased, while plasma uric acid content significantly decreased in both groups at the end of the intervention. Meanwhile, hemolysis was significantly reduced in both groups and DNA injury rate of blood mononuclear cells in lotus root group and the ratio of comet tail length to total length in cucumber group were also declined significantly post-intervention. However, plasma value of ferric reducing antioxidant power assay, contents of reduced glutathione, vitamin E, malondialdehyde, oxidized low density lipoprotein, carbonyls and activity of superoxide dismutase and catalase were not changed significantly in both group after the intervention. CONCLUSION These results suggest that lotus root and cucumber are not remarkably different in improving antioxidant function in aged subjects, though they are significantly different in antioxidant capacity in vitro. The benefits observed in this study may come from the additive or synergistic combinations of antioxidants contained in vegetables.
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Affiliation(s)
- L Ji
- Changjiang Guo, Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China, Tel.: +86 22 84655429; fax: + 86 22 84655020, E-mail:
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Sun Y, Zheng H, Xi D, Zhang X, Du M, Pu L, Lin M, Yang Y. Molecular characteristics of the MHC-DRA genes from yak (Bos grunniens) and Chinese yakow (Bos grunniens × Bos taurus). Int J Immunogenet 2013; 41:69-73. [PMID: 23815277 DOI: 10.1111/iji.12072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 04/23/2013] [Accepted: 06/02/2013] [Indexed: 11/28/2022]
Abstract
Two full-length cDNAs (762 bp) of the DRA gene from yak and Chinese yakow were isolated and analysed to identify structural and functional variations. The sequences for DRA in yak (Bogr-DRA) and Chinese yakow (Bogr × BoLA-DRA) were essentially identical to those for cattle (99%) and buffalo (97%). Except for two substitutions in the amino acids comprising the domain for signal peptide (SP) in yak, the additional residues were highly conserved across the species investigated. Peptide-binding site (PBS) of Bogr-DRA and Bogr × BoLA-DRA was highly reserved in the α1 domain among all species investigated. The lack of mutation in Bogr-DRA is consistent with the conception that the gene is highly conserved among all mammalian species. The very high conservation of the DRA gene among ruminants, including yak, may be due to its recent evolutionary detachment.
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Affiliation(s)
- Y Sun
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
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Xiong H, Guo LM, Li XW, Jiao YQ, Li BS, Xiang P, Guo J, Zhang M, Li WL, Pu L, Zhang LC. PP-071 Clinical features of critically ill pregnant patients with influenza A (H1N1) infection. Int J Infect Dis 2010. [DOI: 10.1016/s1201-9712(10)60139-7] [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: 10/19/2022] Open
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Shenglin M, Yaping X, Jian W, Pu L, Xiaoyun D, Xiaojiang S, Yongling J, Hao J. Dosimetric evaluation of different IMRT treatment plans for non-small cell lung cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e17513] [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: 11/20/2022] Open
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Hyacinth MA, Borges AR, Lum M, Chruszcz M, Caran KL, Pu L, Sabat M. Crystal engineering of propargylic alcohols–new developments and applications. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307098893] [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: 11/10/2022] Open
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Persoons A, Kauranen M, Elshocht SV, Verbiest T, Ma L, Pu L, Langeveld-voss BMW, Meijer EW. Chiral effects in second-order nonlinear optics. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259808044315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- A. Persoons
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - M. Kauranen
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - S. Van Elshocht
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - T. Verbiest
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - L. Ma
- b Department of Chemistry , University of Virginia , Charlottesville , VA , 22901
| | - L. Pu
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - B. M. W. Langeveld-voss
- c Laboratory of Organic Chemistry , Eindhoven University of Technology , PO Box 513, 5600 , MB , Eindhoven , The Netherlands
| | - E. W. Meijer
- c Laboratory of Organic Chemistry , Eindhoven University of Technology , PO Box 513, 5600 , MB , Eindhoven , The Netherlands
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Hyacinth MA, Gao G, Bin L, Sabat M, Pu L. Interactions of supramolecular synthons formed by secondary propargylic alcohols. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305084941] [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: 11/10/2022] Open
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Pu L, Shi Y, Zhu JM, Bao XM, Zhang R, Zheng YD. Electrochemical lithography: fabrication of nanoscale Si tips by porous anodization of Al/Si wafer. Chem Commun (Camb) 2004:942-3. [PMID: 15069486 DOI: 10.1039/b315810a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous anodization of Al/Si wafer in sulfuric acid results in the formation of Si nanotips on the surface of Si substrate with ultrahigh packing density.
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Affiliation(s)
- L Pu
- Department of Physics, Nanjing University, Nanjing 210093, China.
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Pugh VJ, Hu QS, Zuo X, Lewis FD, Pu L. Optically active BINOL core-based phenyleneethynylene dendrimers for the enantioselective fluorescent recognition of amino alcohols. J Org Chem 2001; 66:6136-40. [PMID: 11529742 DOI: 10.1021/jo010479t] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A dramatic enhancement in fluorescence intensity from 1,1'-bi-2-naphthol (BINOL) to dendritic phenyleneethynylenes containing the BINOL core was observed. The strong fluorescence of the dendrimers allows a very small amount of the chiral materials to be used for sensing. The light harvesting antennas of the dendrimer funnel energy to the center BINOL unit, whose hydroxyl groups upon interaction with a quencher molecule lead to fluorescence quenching. This mechanism makes the dendrimers have much more sensitive fluorescence responses than corresponding small molecule sensors. The fluorescence of these dendrimers can be enantioselectively quenched by chiral amino alcohols. It is observed that the fluorescence lifetime of the generation two dendrimer does not change in the presence of various concentrations of 2-amino-3-phenyl-1-propanol. This demonstrates that the fluorescence quenching is entirely due to static quenching. Thus, formation of nonfluorescent ground-state hydrogen-bond complexes between the dendrimers and amino alcohols is proposed to account for the fluorescent quenching. A linear relationship has been established between the Stern-Völmer constant of the generation two dendrimer and the enantiomeric composition of 2-amino-3-phenyl-1-propanol. Such enantioselective fluorescent sensors may allow a rapid determination of the enantiomeric composition of chiral molecules and are potentially useful in the combinatorial search of asymmetric catalysts and reagents.
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Affiliation(s)
- V J Pugh
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, USA
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Gong LZ, Hu QS, Pu L. Optically active dendrimers with a binaphthyl core and phenylene dendrons: light harvesting and enantioselective fluorescent sensing. J Org Chem 2001; 66:2358-67. [PMID: 11281776 DOI: 10.1021/jo001565g] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Optically active dendrimers containing a 1,1'-binaphthyl core and cross-conjugated phenylene dendrons were synthesized and characterized. The chiral optical properties of these phenylene-based dendrimers are different from the previously reported phenyleneethynylene-based dendrimers probably because of the increased steric interaction between the adjacent phenylene units. UV and fluorescence spectroscopic studies demonstrate that the energy harvested by the periphery of the dendrimers can be efficiently transferred to the more conjugated core, generating much enhanced fluorescence signal at higher generation. The fluorescence of these dendrimers can be quenched both efficiently and enantioselectively by chiral amino alcohols. The energy migration and light-harvesting effects of the dendrimers make the higher generation dendrimer more sensitive to fluorescent quenchers than the lower ones. Thus, the dendritic structure provides a signal amplification mechanism. These materials are potentially useful in the enantioselective recognition of chiral organic molecules.
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Affiliation(s)
- L Z Gong
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, USA
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Abstract
Because of the tremendous effort of a great number of researchers, the catalytic asymmetric dialkylzinc addition to aldehydes has become a mature method. Ligands of diverse structures have been obtained, and high enantioselectivity for all different types of aldehydes have been achieved. Among the representative excellent catalysts are compounds 1, 8, 120, 325, 352, and 360 discussed above. However, compared to the well-developed dialkylzinc addition, the catalytic asymmetric reactions of aryl-, vinyl-, and alkynylzinc reagents with aldehydes are still very much under developed. Although catalysts such as (S)-402 and 210 prepared by Pu and Bolm have shown good enantioselectivity for the reaction of diphenylzinc with certain aromatic and aliphatic aldehydes, the generality of these catalysts for other [formula: see text] arylzinc reagents have not been studied. The vinylzinc additions using ligands 1 and 412 reported by Oppolzer and Wipf were highly enantioselective for certain aromatic aldehydes but not as good for aliphatic aldehydes. Carreira discovered highly enantioselective alkynylzinc additions to aldehydes promoted by the chiral amino alcohol 415, but this process was not catalytic yet. Ishizaki achieved good enantioselectivity for the catalytic alkynylzinc addition to certain aldehydes by using compounds 160, but the enantioselectivity for simple linear aliphatic aldehydes was low. Another much less explored area is the organozinc addition to ketones. Yus and Fu showed very promising results by using ligands 381 and 406 for both dialkylzinc and diphenylzinc additions to ketones, but the scope of these reactions were still very limited. Therefore, more work is needed for the aryl-, vinyl-, and alkynylzinc additions and for the organozinc addition to ketones, although many good catalysts have been obtained for the dialkylzinc addition to aldehydes. Development of these reactions will allow the catalytic asymmetric synthesis of a great variety of functional chiral alcohols that are either the structural units or synthons of many important organic molecules as well as molecules of biological functions. Macromolecular chiral catalysts have become a very attractive research subject in recent years because these materials offer the advantages of simplified product isolation, easy recovery of the generally quite expensive chiral catalysts, and potential use for continuous production. Three types of macromolecules including flexible achiral polymers anchored with chiral catalysts, rigid and sterically regular main chain chiral polymers, and chiral dendrimers have been used for the asymmetric organozinc addition to aldehydes. Among these materials, the binaphthyl-based polymers such as (R)-451 developed by Pu have shown very high and general enantioselectivity. Study of the binaphthyl polymers in the asymmetric organozinc addition has demonstrated that it is possible to systematically modify the structure and function of the rigid and sterically regular polymer for the development of highly enantioselective polymer catalysts. The catalytic properties of highly enantioselective monomer catalysts can also be preserved in the rigid and sterically regular polymer provided the catalytically active species of the monomer catalyst is not its aggregate. The TADDOL-based polymers and dendrimers prepared by Seebach showed very high and stable enantioselectivity for the diethylzinc addition to benzaldehyde even after many cycles. These studies on macromolecular chiral catalysts demonstrate that these materials are potentially very useful for practical applications.
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Affiliation(s)
- L Pu
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, USA
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Abstract
Polymeric/oligomeric and macrocyclic (salophen)Ni(II) complexes have been synthesized starting from both an achiral biphenol dialdehyde and an optically active BINOL dialdehyde. It was found that these polysalophens contain nonplanar coordination of Ni(II) units that are paramagnetic. This is different from the previously reported (salophen)Ni(II) complexes which are square planar and diamagnetic. The nonplanar (salophen)Ni(II) units make the new polymeric Ni(II) complexes different from the helical structure proposed for chiral biaryl-based polymers containing square-planar (salophen)Ni(II) units. The copolymerization of the chiral binaphthyl monomer with the achiral biphenyl monomer demonstrates that the chirality of the binaphthyl unit is not propagated along the biphenyl polymer chain.
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Affiliation(s)
- H C Zhang
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901, USA
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Baiqiu W, Songbin F, Guiyin Z, Pu L. Study of the relationship between psoriasis and the polymorphic site C677T of methylenetetrahydrofolate reductase. Chin Med Sci J 2000; 15:119-20. [PMID: 12901638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
OBJECTIVE In order to investigate 5,10-methylenetetrahydrofolate reductase (MTHFR)'s polymorphic changes in psoriasis vulgaris. METHODS We detected mutation of site C677V of MTHFR in 39 psoriastics by PCR-RFLP. RESULTS Genotype frequencies of the psoriastics were C/C=20.15%, C/T=48.72% and T/T=30.77%; the allelic frequencies were C=0.4487 and T=0.5513. Homozygous mutant (TT) of the psoriastics was significantly different from the normal control group by X2 test. CONCLUSION C677V mutant of MTHFR might be related with psoriasis.
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Affiliation(s)
- W Baiqiu
- Department of Medical Genetics, Harbin Medical University, Harbin 150086
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Pu L, Bao GB, Ma L, Pei G. Acute desensitization of nociceptin/orphanin FQ inhibition of voltage-gated calcium channels in freshly dissociated hippocampal neurons. Eur J Neurosci 1999; 11:3610-6. [PMID: 10564368 DOI: 10.1046/j.1460-9568.1999.00776.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Nociceptin/orphanin FQ (N/OFQ), an endogenous ligand for opioid receptor-like receptor, has been shown to inhibit high-voltage-gated calcium channels (VGCCs) in acutely dissociated rat hippocampal pyramidal cells [Knoflach, F., Reinscheid, R.K., Civelli, O. & Kemp, J.A. (1996), J. Neurosci., 16, 6657]. In this study, it was further demonstrated that N/OFQ inhibition of calcium channel current was blocked by its specific antagonist PGN, [Phe1-psi(CH2-NH)-Gly2]nociceptin (1-13)-NH2, and the EC50 of the N/OFQ inhibition was approximately 10 nM, indicating that this effect was really mediated via the opioid receptor-like receptor. The N/OFQ inhibition of the calcium channel current was significantly reduced, as the maximal inhibition decreased from 36 to 23%, by 1-min pretreatment of freshly dissociated hippocampal neurons with the same peptide. The inhibition completely recovered from this acute desensitization in less than 20 min. The N/OFQ inhibition was also greatly attenuated by pretreatment of the neurons with the GABAB (gamma-aminobutyric acid) agonist baclofen while the baclofen inhibition of the calcium channel current was significantly reduced by N/OFQ pretreatment, revealing the agonist-induced desensitization was heterologous in nature. This desensitization was blocked by pretreating the neurons with the sodium channel blocker, tetrodotoxin (TTX), or by removing the extracellular calcium, which indicates the necessity of membrane depolarization and extracellular calcium influx in the process. Furthermore, pretreatment of the neurons with the protein kinase C (PKC) activator, phorbol 12-myristate 13-acetate (PMA), attenuated the N/OFQ inhibition of the calcium channel current whereas the cAMP-dependent kinase A activator, forskolin, showed no effect, suggesting the probable involvement of PKC in the N/OFQ-induced desensitization.
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Affiliation(s)
- L Pu
- Shanghai Institute of Cell Biology, Shanghai Research Center of Life Sciences, Chinese Academy of Sciences, People's Republic of China
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Abstract
Brain membrane lipid fatty acid composition and consequently membrane fluidity change with increasing age. Intracellular fatty acid binding proteins (FABPs) such as heart H-FABP and the brain specific B-FABP, detected by immunoblotting of brain tissue, are thought to be involved in fatty acid uptake, metabolism, and differentiation in brain. Yet, almost nothing is known regarding the effect of age on the expression of the cytosolic fatty acid binding proteins (FABPs) or their content in brain subfractions. Electrophoresis and quantitative immunoblotting were used to examine the content of these FABPs in synaptosomes in brains from 4, 15, and 25 month old C57BL/6NNia male mice. Brain H-FABP and B-FABP were differentially expressed in mouse brain subcellular fractions. Brain H-FABP was highly concentrated in synaptosomal cytosol. The level of brain H-FABP in synaptosomes, synaptosomal cytosol, and intrasynaptosomal membranes was decreased 33, 35, and 43%, respectively, in 25 month old mice. B-FABP was detected in lower quantity than H-FABP. More important, B-FABP decreased in synaptosomes, synaptic plasma membranes, and synaptosomal cytosol from brains of 25 month old mice. In contrast to H-FABP, B-FABP was not detectable in the intrasynaptosomal membranes in any of the three age groups of mice. In conclusion, expression of both H-FABP and B-FABP was markedly reduced in aged mouse brain. Age differences in brain H-FABP and B-FABP levels in synaptosomal plasma membranes and synaptosomal cytosol may be important factors modulating neuronal differentiation and function.
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Affiliation(s)
- L Pu
- Department of Physiology and Pharmacology, Texas A&M University, TVMC, College Station 77843-4466, USA
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Pu L, Annan RS, Carr SA, Frolov A, Wood WG, Spener F, Schroeder F. Isolation and identification of a mouse brain protein recognized by antisera to heart fatty acid-binding protein. Lipids 1999; 34:363-73. [PMID: 10443969 DOI: 10.1007/s11745-999-0374-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Although a novel brain-specific fatty acid-binding protein (B-FABP) was recently cloned, the identity of a second fatty acid-binding protein detected with antibodies to the heart (H-FABP) has not been clearly resolved. The present investigation, using matrix-assisted laser desorption mass spectrometry, showed that this protein was a form of H-FABP whose N-terminal amino acid was neither methionine nor was it acetylated. Furthermore, isoelectric focusing revealed two major isoforms, a major band pl 7.4 and a minor band pl 6.4, in a distribution pattern opposite to that observed for H-FABP in the heart. Tryptic peptide mass maps of the in-gel digested SDS polyacrylamide gel electrophoresis protein bands showed that the two isoforms differed only in a single peptide corresponding to residues 97-106 of the heart H-FABP sequence. This peptide had an [M + H]+ ion of either 1205.62 (pl 7.4) or 1206.53 (pl 6.4), consistent with a single amino acid substitution, Asp98 or Asn98. Whereas it is well established that both H-FABP and B-FABP interact with polyunsaturated fatty acids, we showed that they also significantly alter plasma membrane cholesterol dynamics in a manner opposite to that of another brain lipid-binding protein, sterol carrier protein-2. In summary, the data demonstrated for the first time that the H-FABP from brain, while nearly identical to H-FABP from heart, differed significantly in isoform distribution and in amino terminal structure from heart H-FABP. This suggests that the brain and heart H-FABP may not necessarily function identically in these tissues.
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Affiliation(s)
- L Pu
- Department of Physiology and Pharmacology, Texas A&M University, TVMC, College Station 77843-4466, USA
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Jianchuan X, Song L, Jianhua Z, Xiaoming N, Quanzhang L, Pu L. Detection of chromosome aberrations in twelve primary gastric cancers by direct chromosome analysis and FISH. Chin Med Sci J 1999; 14:7-12. [PMID: 12899376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
Direct chromosome analysis and FISH were performed on twelve primary gastric carcinomas. Two of them had simple chromosome changes: 48, XX, +8, +20, and 49, XY, +2, +8, +9, and the others had complicated chromosome changes, which includes much more numerical and structural chromosome aberrations. Frequent structural changes in the complicated types involved chromosome 7, 3, 1, 5 and 12 etc. The del 7q was noted in eight cases. The del (3p) and del (1p) were noted in six and five cases, respectively. The results provide some important clues for isolation of the genes related to gastric cancer.
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Affiliation(s)
- X Jianchuan
- Laboratory of Medical Genetics, Basic Medical College of Harbin Medical University, Harbin 150086
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40
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Pu L, Foxworth WB, Kier AB, Annan RS, Carr SA, Edmondson R, Russell D, Wood WG, Schroeder F. Isolation and characterization of 26- and 30-kDa rat liver proteins immunoreactive to anti-sterol carrier protein-2 antibodies. Protein Expr Purif 1998; 13:337-48. [PMID: 9693058 DOI: 10.1006/prep.1998.0908] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Although the existing literature suggests that the sterol carrier protein-2 (SCP-2) gene has only two initiation sites encoding for a 58- and a 15-kDa protein, respectively, this does not explain the profusion of other putative SCP-2-related proteins detectable on Western blotting. Two of these additional anti-SCP-2 immunoreactive proteins, 13.2 and 46 kDa, appear due to proteolytic processing of the two gene transcripts. However, the origin of additional immunoreactive rat liver proteins near 26 and 30 kDa is unclear. The latter proteins were consistently detected on Western blotting by three independent types of polyclonal antisera: anti-13.2-kDa SCP-2, anti-synthetic peptide from the amino-terminus of the 13.2-kDa SCP-2, and Protein A affinity-purified anti-synthetic peptide to the amino-terminus of 13.2-kDa SCP-2. To resolve whether the 26- and 30-kDa proteins are SCP-2 gene products, each protein was isolated from rat liver and purified to homogeneity as indicated by Tricine-SDS polyacrylamide gel electrophoresis, isoelectric focusing, and/or mass spectroscopy. Their masses, determined by MALDI-TOF mass spectroscopy, were 25.7 and 29.8 kDa, respectively. However, the mass spectral data were not consistent with either protein being an SCP-2 gene product. Peptide mass mapping of the 25.7-kDa protein revealed identity to the rat 25,784.79-Da glutathione-S-transferase. Furthermore, neither the mass nor the amino acid composition of the 29.8-kDa protein correlated with any SCP-2 gene product or dimerized SCP-2 gene product. A database search of the amino acid composition identified the protein as rat carbonic anhydrase. In summary, although the 26- and 29.8-kDa proteins may share some common epitopes with the 13.2-kDa SCP-2, they were not SCP-2 gene products.
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Affiliation(s)
- L Pu
- Department of Physiology and Pharmacology, TVMC, Texas A&M University, College Station, Texas 77843, USA
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Wang H, Li L, Pu L. [The effect of 25 micrograms misoprostol on induction of labor in late pregnancy]. Zhonghua Fu Chan Ke Za Zhi 1998; 33:469-71. [PMID: 10806744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
OBJECTIVE To determine the efficacy and safety of 25 micrograms misoprostol for labor induction in the third trimester of pregnancy. METHODS 48 term pregnant women with single pregnant vertex present intact membrane were selected in study group. All case in study group indications for labor induction, without contra-indication of labor induction and misoprostol. The 48 women were randomly assigned A(25 micrograms) and B(50 micrograms) misoprostol groups. Misoprostol was placed in the posterior vaginal fornix every 4 to 6 hours. The maximum dose in 24 hours is 200 micrograms. Misoprostol was not given after either spontaneous rupture of membrane or beginning of active labor. RESULT The sucesess rate of induction labor was groups 77.8%, 81.0% in group A and B, respectively. The average duration from administration of misoprostol to start of labor in two groups was 796.9 +/- 359.9 minutes and 807.4 +/- 405.2 minutes, respectively; the average duration from start of misoprostol use to vaginal delivery was 978.6 +/- 464.4 minutes, 977.5 +/- 421.4 minutes, respectively. The incidence of vaginal delivery had no statistics significant difference between two groups (P > 0.05). The incidence of hypertonic uterine contraction or hypertonic contractionchysystole with abnormal pattern of fetal monitoring in group A was lower than that of group B, but there was no significant difference (P > 0.05). CONCLUSION 25 micrograms misoprostol is an efficient and safe dosage for labor induction in term pregnancy.
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Abstract
The effects of antisense oligonucleotide to insulin-like growth factor II (IGFII) to induce apoptosis in human ovarian cancer cells were evaluated. antiproliferation effects of antisense to IGFII in ovarian cancer AO cells were determined by 3H-thymidine incorporation. Apoptosis of the IGFII antisense-treated cells was quantitated by both nuclear condensation and flow cytometry after cells were stained with propidium iodide. IGFII antisense (4.5 microM) treatment of 48 h maximally inhibited proliferation of AO cells. More than 25% of IGFII antisense-treated cells (4.5 microM for 24 h) had undergone apoptosis, whereas less than 3% of the cells were apoptotic in either IGFII sense-treated cells or untreated cells. Antisense oligonucleotide to IGFII significantly inhibited cell proliferation and induced apoptosis in human ovarian cancer AO cell. These data suggest that IGFII may be a potential target in treatment of ovarian cancer and antisense oligonucleotide to IGFII may serve as a therapeutic approach.
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Affiliation(s)
- D L Yin
- Shanghai Institute of Cell Biology, Chinese Academy of Sciences, China
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Wu S, Xiang K, Weng Q, Lin X, Li Q, Dai Y, Zhao H, Shen W, Pu L, Li J. Relationship between angiotensin I converting enzyme gene polymorphism and diabetic nephropathy. Chin Med J (Engl) 1998; 111:478-9. [PMID: 10374364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Affiliation(s)
- S Wu
- Department of Endocrinology and Metabolism, Shanghai Sixth People's Hospital, China
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Ren XH, Zhao J, Pu L, Ling K, Yin DL, Pei G. Differential neurotoxicity of etorphine-like opiates: lack of correlation with their ability to activate opiate receptors. Toxicon 1998; 36:735-43. [PMID: 9655634 DOI: 10.1016/s0041-0101(97)00109-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The present study was undertaken to compare the neurotoxic effects of three etorphine-like opiates (etorphine, dihydroetorphine, and another derivative of oripavine) and heroin with their ability to activate opiate receptors in human neuroblastoma cell line SK-N-SH as well as in two other neuronal cell lines. Neurotoxicity was measured by using [3H]-thymidine incorporation analysis, cell viability measurement and Cytosensor microphysiometry. It was found that, in spite of the very similar molecular structures of these opiates, they displayed significant differences in cytotoxicity, with etorphine and another derivative of oripavine possessing high potency but dihydroetorphine and heroin little effect. However, neurotoxic potency of the opiates was not directly correlated to their ability to activate opioid receptors, as determined by [35S]-guanylyl-5'-O-(gamma-tho)-triphosphate binding assay. These findings provide clear evidence of differential neurotoxicity of etorphine-like opiates, and suggest that the neurotoxicity is not closely related to the molecular configuration required as opioid receptor agonist but is probably associated with the presence of a double bond in the structure.
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Affiliation(s)
- X H Ren
- Shanghai Institute of Cell Biology, Chinese Academy of Sciences
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45
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Wu YN, Pu L, Xing SZ. [Clinical study on the recovery of sensory function in tissue flaps repairing the defect of oral and maxillofacial region]. Shanghai Kou Qiang Yi Xue 1997; 6:202-4. [PMID: 15160194] [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: 04/29/2023]
Abstract
The recovery of sensibility in 29 cases non-neurolorized tissue flaps and 4 cases neurolorized flaps have been studied clinically. The results showed that:the sensory function started to return from 3 months after operation and recovered gradually.Pain sensibility recovered first,followed by tactile,thermal and two-point discrimination sensibility.The recovery usually occured from edge to centre of the flap 2-3 years after operation,about 65.5% nonneurolorized flaps obtained good recovery of sensibility.The recovery rate of pain,tactile,thermal and two-point discrimination sensibililty was 64.7%,64.7%,53.0% and 23.5% respectively.Flaps recovered better than myocutaneous flaps.The recovery of sensibility of the neurolorized flaps occurred early and quickly.All 4 cases obtained excellent sensory recovery including two-point discrimination sensibility.The results suggest that:the sensory function of tissue flaps come from not only surrounding,but also deep tissue,any factor that can cause decrease of quality and quantity of regenerated nerve endings will inhibit flap from recovering its sensory function.
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Affiliation(s)
- Y N Wu
- Department of Oral and Maxillofacial Surgery,The Affiliated Stomatological Hospital of Nanjing Medical University. Nanjing 210029,China
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46
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Yin DL, Ren XH, Zheng ZL, Pu L, Jiang LZ, Ma L, Pei G. Etorphine inhibits cell growth and induces apoptosis in SK-N-SH cells: involvement of pertussis toxin-sensitive G proteins. Neurosci Res 1997; 29:121-7. [PMID: 9359460 DOI: 10.1016/s0168-0102(97)00080-1] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Opiates have been used extensively in the treatment of pain but with the severe side effect of addiction, which is believed to be related to opiates' direct (primary) or indirect (secondary) neurotoxicity. In this study, the effects of opioids on cell growth and apoptosis have been examined in human neuroblastoma cell line SK-N-SH. Etorphine, a wide-spectrum and potent agonist of opioid receptors, was found to significantly inhibit cell growth and to induce apoptosis. The inhibitory and apoptotic activities of etorphine followed a dose- and time-dependent manner. The more specific agonists of opioid receptors such as morphine, [D-Ala2, N-Me-Phe4, Gly5-ol]-enkephalin (DAGO), [D-Pen2, D-Pen5]-enkephalin (DPDPE), dynorphin A and nociceptin/orphanin FQ did not show similar toxic activities under the same conditions. In addition, the effects of etorphine could not be blocked by the opioid receptor antagonist naloxone, suggesting that the effects of etorphine might not be mediated by a classical opioid receptor. However, pretreatment of SK-N-SH cells with pertussis toxin (PTX) blocked the inhibition of cell growth and apoptosis induced by etorphine, indicating the involvement of PTX-sensitive G proteins in the processes. It was also shown that etorphine-induced apoptosis was prevented by actinomycin D (AD) and interleukin-1beta converting enzyme inhibitor I. Interestingly, etorphine was similarly potent to inhibit growth of pheochromocytoma (PC12) cells but less effective in SH-SY5Y neuroblastoma cells and C6 glioma cells. We propose that inhibition of cell growth and induction of apoptosis may be one mechanism of opioid neurotoxicity.
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Affiliation(s)
- D L Yin
- Shanghai Institute of Cell Biology, Chinese Academy of Sciences, People's Republic of China
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Pei G, Ling K, Pu L, Cunningham MD, Ma L. Nociceptin/orphanin FQ stimulates extracellular acidification and desensitization of the response involves protein kinase C. FEBS Lett 1997; 412:253-6. [PMID: 9257731 DOI: 10.1016/s0014-5793(97)00790-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A Chinese hamster ovary (CHO) cell line, CHO-ORL1, stably expressing human opioid receptor-like receptor 1 (ORL1) has been used to determine ORL1-mediated signaling events using microphysiometry. Nociceptin/orphanin FQ (N/OFQ), a specific endogenous agonist of ORL1, induced an increase in extracellular acidification rate (ECAR) in CHO-ORL1 cells. The ECAR response stimulated by N/OFQ was concentration-dependent and pertussis toxin-sensitive. Repeated exposures of the cells to N/OFQ caused desensitization of ORL1. The ECAR response was recovered at the half-life of approximately 12 min after the initial challenge. Pretreatment with inhibitor of cAMP-dependent kinase did not affect desensitization of ORL1. However, specific inhibitors for protein kinase C almost abolished N/OFQ-induced desensitization of extracellular acidification responsiveness, indicating the involvement of protein kinase C in the process.
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Affiliation(s)
- G Pei
- Shanghai Institute of Cell Biology, Chinese Academy of Sciences, People's Republic of China
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Abstract
The opioid receptor-like1 receptor (ORL1), an orphan receptor whose human and murine complementary DNAs, has been characterized recently. ORL1 transcripts are particularly abundant in the central nervous system. We demonstrated that ORL1 expressed in human neuroblastoma SK-N-SH and SH-SY5Y cell lines by radioligand binding assay, reverse transcription polymerase chain reaction (RT-PCR) and Northern analysis in the present study. Stimulation with ORL1 specific agonist, nociceptin/orphanin FQ, increased [35S]GTP gamma S binding to SK-N-SH cell membranes (EC50 = 14 +/- 0.45 nM), and attenuated forskolin-stimulated accumulation of cellular cAMP (EC50 = 0.80 +/- 0.45 nM), indicative that activation of ORL1 activates G proteins and inhibits adenylyl cyclase. Activation of ORL1 receptor was also accessed using CHO:hORL1 cell line by microphysiometer. Treatment of nociceptin/orphanin FQ increased extracellular acidification rate significantly.
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Affiliation(s)
- Y L Wu
- Shanghai Institute of Cell Biology, Chinese Academy of Sciences, China
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Xiang K, Wang Y, Wu S, Lu H, Zheng T, Sun D, Weng Q, Jia W, Shen W, Pu L, He J. Mitochondrial tRNA(Leu(UUR)) gene mutation diabetes mellitus in Chinese. Chin Med J (Engl) 1997; 110:372-8. [PMID: 9594306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
OBJECTIVE To ascertain the prevalence and clinical features of mitochondrial tRNALeu(UUR) gene nucleotide (nt) 3243 A-->G mutation diabetes mellitus in Chinese and to establish the approaches for genetic diagnosis of this subtype of diabetes during routine daily clinical practice. METHODS Mitochondrial nt 3243 A-->G mutation was screened among 207 unrelated non-insulin-dependent diabetes mellitus (NIDDM) patients by using polymerase chain reaction (PCR)/Apa I restriction endonuclease digestion. Samples with positive result were confirmed by DNA sequence analysis. Genetic and clinical analysis were carried out in family members of the proband with positive genetic diagnosis. RESULTS Positive results were found in two subjects during screening of unrelated NIDDM patients, which account for 2.4%-11.1% of NIDDM subjects with uncommon clinical features (with early age-of-onset, with low body-mass-index and on insulin therapy) or with positive family history of diabetes consistent with or unable to exclude from maternal inheritance. Genetic diagnosis was positive in 10 out of 25 family members in the pedigrees of these two probands. CONCLUSIONS Mitochondrial tRNALeu(UUR) gene nt 3242 A-->G mutation should be considered in diabetic patients with the above-mentioned clinical features. The genetic diagnosis in daily clinical practice can be performed with allele specific priming amplification, or PCR/Hae III or Apa I digestion which are technically simple to perform and diagnostically easy to define.
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Affiliation(s)
- K Xiang
- Department of Endocrinology and Metabolism, Shanghai Sixth People Hospital, China
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50
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Zhang JZ, Kreger MA, Hu QS, Vitharana D, Pu L, Brock PJ, Scott JC. Femtosecond studies of exciton dynamics in a novel main chain chiral conjugated poly(arylenevinylene). J Chem Phys 1997. [DOI: 10.1063/1.473423] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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