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Qiu JM, Zeng FF, Cheng C, Wen HY, Huang SQ, Liu D, Qi JL, Yin P, Zhou MG, Xu Y, Liu ZP, Mei QS, Xiao H, Xiang Z, Liang XF. [Disease burden of acute viral hepatitis in Guangdong Province, 1990-2019]. Zhonghua Liu Xing Bing Xue Za Zhi 2024; 45:365-372. [PMID: 38514313 DOI: 10.3760/cma.j.cn112338-20230830-00108] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Objective: To examine the burden and trends of acute viral hepatitis in Guangdong Province from 1990 to 2019, and provide reference evidences for hepatitis prevention and control in the province. Methods: Data on acute viral hepatitis (hepatitis A, B, C, and E) in Guangdong from 1990 to 2019 were extracted from the Global Burden of Disease Study 2019 database. The incidence, prevalence, mortality, and disability-adjusted life years (DALY) data were analyzed by age and gender, and the estimated annual percentage change (EAPC) was calculated to describe the changing trends in disease burden. Results: From 1999 to 2019, the standardized incidence, prevalence, mortality, and DALY of acute viral hepatitis in Guangdong were higher than the national averages. In 2019, 51.43% (2 245 087/4 365 221) of acute viral hepatitis cases in Guangdong Province were mainly attributed to hepatitis B, and 77.18% (106/138) of deaths were due to acute hepatitis B. In different age groups, except for acute hepatitis B, which was more common in adults, the incidence rates of other types of viral hepatitis such as hepatitis A, B, and E showed an overall decreasing trend with age. The mortality rates of different types of acute viral hepatitis, except for the <5 age group, increased with age. The overall incidence and mortality rates of acute viral hepatitis were higher in men than in women. Conclusions: The overall burden of acute viral hepatitis in Guangdong declined in 2019, but remained higher than the national level. Further efforts are needed to strengthen hepatitis prevention and screening in different population in Guangdong Province, especially in children and the elderly.
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Affiliation(s)
- J M Qiu
- Department of Preventive Medicine, School of Basic Medicine and Public Health, Jinan University/Disease Control and Prevention Institute of Jinan University/Kangtai Biological Vaccine Industry Research Institute, Jinan University, Guangzhou 510632, China
| | - F F Zeng
- Department of Preventive Medicine, School of Basic Medicine and Public Health, Jinan University/Disease Control and Prevention Institute of Jinan University/Kangtai Biological Vaccine Industry Research Institute, Jinan University, Guangzhou 510632, China
| | - C Cheng
- Department of Medical Affairs, the First Affiliated Hospital of Jinan University (Guangzhou Overseas Chinese Hospital), Guangzhou 510630, China
| | - H Y Wen
- Department of Preventive Medicine, School of Basic Medicine and Public Health, Jinan University/Disease Control and Prevention Institute of Jinan University/Kangtai Biological Vaccine Industry Research Institute, Jinan University, Guangzhou 510632, China
| | - S Q Huang
- Department of Preventive Medicine, School of Basic Medicine and Public Health, Jinan University/Disease Control and Prevention Institute of Jinan University/Kangtai Biological Vaccine Industry Research Institute, Jinan University, Guangzhou 510632, China
| | - D Liu
- Department of Preventive Medicine, School of Basic Medicine and Public Health, Jinan University/Disease Control and Prevention Institute of Jinan University/Kangtai Biological Vaccine Industry Research Institute, Jinan University, Guangzhou 510632, China
| | - J L Qi
- National Center for Chronic and Non-communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - P Yin
- National Center for Chronic and Non-communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - M G Zhou
- National Center for Chronic and Non-communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Y Xu
- Chronic Disease Prevention and Control Hospital of Bao'an District, Shenzhen 518020, China
| | - Z P Liu
- Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research, College of Pharmacy, Jinan University, Guangzhou 511436, China
| | - Q S Mei
- Department of Medical Biochemistry and Molecular Biology, School of Basic Medical and Public Health, Jinan University, Guangzhou 510632, China
| | - H Xiao
- School of Life Science and Technology/Research Institute of Pathogenic Microorganisms, Jinan University, Guangzhou 510632,China
| | - Z Xiang
- Department of Microbiology and Immunology, School of Basic Medicine and Public Health, Jinan University, Guangzhou 510632, China
| | - X F Liang
- Department of Preventive Medicine, School of Basic Medicine and Public Health, Jinan University/Disease Control and Prevention Institute of Jinan University/Kangtai Biological Vaccine Industry Research Institute, Jinan University, Guangzhou 510632, China
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Duan H, Chen H, Qi C, Lv F, Wang J, Liu Y, Liu Z, Liu Y. A novel electrospun nanofiber system with PEGylated paclitaxel nanocrystals enhancing the transmucus permeability and in situ retention for an efficient cervicovaginal cancer therapy. Int J Pharm 2024; 650:123660. [PMID: 38072148 DOI: 10.1016/j.ijpharm.2023.123660] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Revised: 11/16/2023] [Accepted: 11/29/2023] [Indexed: 12/22/2023]
Abstract
Overcoming the vaginal barrier to achieve sufficient drug penetration and retention is a huge obstacle for drug delivery in chemotherapeutics for cervical cancer. In this study, we investigate the feasibility of a novel composite nanocrystal/nanofiber system for improving the transmucus penetration and, thus, enhancing retention and drug delivery to the lesion of a cervicovaginal tumor. Herein, paclitaxel (PTX) was sequentially formulated in the form of nanocrystals, coated with polydopamine (PDA), and modified with PEG. The nanocrystals (NCs@PDA-PEG) were creatively fabricated to create a composite nanofibrous membrane (NCs@PDA-PEG NFs) by using an electrospinning technique. The morphology, size distribution, drug loading, encapsulation efficiency, X-ray powder diffraction (XRD), Fourier transform infrared (FTIR) spectra, in vitro release, in vivo vaginal retention, apoptosis index, anti-tumor efficacy in a murine cervicovaginal tumor model, and local irritation were characterized. The NCs@PDA-PEG were formulated in a cube-like shape with an average size of 385.6 ± 35.47 nm; they were dispersed in electrospun nanofibers, and the drug loading was 7.94 %. The XRD curves indicated that the phase state of PTX changed after the creation of the nanocrystals. The FTIR spectra showed that the drug and the excipients were compatible with each other. In vitro delivery showed that the dissolution of PTX in the electrospun nanofibers was significantly faster than that when using bulk PTX. Compared with the PTX NC NFs, the NC@PDA-PEG NFs exhibited prolonged vaginal residence, superior transmucus penetration, minimal mucosal irritation, and significant tumor inhibition efficacy after the intravaginal administration of the NFs in tumor-bearing mice. In conclusion, by acting as novel pharmaceutical repositories, NCs@PDA-PEG NFs can be promising candidates for non-invasive local treatment, leading to efficient tumor inhibition in cervicovaginal cancer.
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Affiliation(s)
- Huan Duan
- Department of Pharmacy, Shanghai Xuhui Center Hospital, Shanghai ,200031, China.
| | - Haini Chen
- School of Health Science and Engineering, University of Shanghai for Science and Technology,Shanghai 200093, China.
| | - Chenrui Qi
- School of Health Science and Engineering, University of Shanghai for Science and Technology,Shanghai 200093, China.
| | - Fengmei Lv
- School of Health Science and Engineering, University of Shanghai for Science and Technology,Shanghai 200093, China.
| | - Jun Wang
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Shanghai 201203, China.
| | - Yicheng Liu
- Shanghai Fragrant Hill Middle School, Shanghai 200136, China.
| | - Zhepeng Liu
- School of Health Science and Engineering, University of Shanghai for Science and Technology,Shanghai 200093, China; Shanghai WD Pharmaceutical Co., Ltd., Shanghai 201203, China.
| | - Yu Liu
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Shanghai 201203, China.
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Ci LQ, Huang ZG, Liu Y, Liu ZP, Wei G, Lu WY. Erratum: Author correction to 'Amino-functionalized poloxamer 407 with both mucoadhesive and thermosensitive properties: Preparation, characterization and application in vaginal drug delivery system' [Acta Pharm Sin B 7 (2017) 593-602]. Acta Pharm Sin B 2023; 13:3961-3962. [PMID: 37719373 PMCID: PMC10501880 DOI: 10.1016/j.apsb.2023.06.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/19/2023] Open
Abstract
[This corrects the article DOI: 10.1016/j.apsb.2017.03.002.].
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Affiliation(s)
- Li-qian Ci
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Zhi-gang Huang
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China
| | - Yu Liu
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China
| | - Zhe-peng Liu
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Gang Wei
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China
| | - Wei-yue Lu
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China
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Wang PJ, Wang DH, Gao Y, Shou YR, Liu JB, Mei ZS, Cao ZX, Pan Z, Kong DF, Xu SR, Liu ZP, Chen SY, Zhao JR, Geng YX, Zhao YY, Yan XQ, Ma WJ. A versatile control program for positioning and shooting targets in laser-plasma experiments. Rev Sci Instrum 2023; 94:093303. [PMID: 37772947 DOI: 10.1063/5.0158103] [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] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 09/02/2023] [Indexed: 09/30/2023]
Abstract
We introduce a LabVIEW-based control program that significantly improves the efficiency and flexibility in positioning and shooting solid targets in laser-plasma experiments. The hardware driven by this program incorporates a target positioning subsystem and an imaging subsystem, which enables us to install up to 400 targets for one experimental campaign and precisely adjust them in six freedom degrees. The overall architecture and the working modes of the control program are demonstrated in detail. In addition, we characterized the distributions of target positions of every target holder and simultaneously saved the target images, resulting in a large dataset that can be used to train machine learning models and develop image recognition algorithms. This versatile control system has become an indispensable platform when preparing and conducting laser-plasma experiments.
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Affiliation(s)
- P J Wang
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Institute of Radiation Physics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden 01328, Germany
| | - D H Wang
- State Key Laboratory of Laser Interaction with Matter, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - Y Gao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Y R Shou
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - J B Liu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Z S Mei
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Z X Cao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Z Pan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - D F Kong
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - S R Xu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Z P Liu
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - S Y Chen
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - J R Zhao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Y X Geng
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - Y Y Zhao
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
| | - X Q Yan
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Beijing Laser Acceleration Innovation Center, Huairou, Beijing 101400, China
- Institute of Guangdong Laser Plasma Technology, Baiyun, Guangzhou 510540, China
| | - W J Ma
- State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China
- Beijing Laser Acceleration Innovation Center, Huairou, Beijing 101400, China
- Institute of Guangdong Laser Plasma Technology, Baiyun, Guangzhou 510540, China
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Liu ZP, Wu YL, Duan GJ, Meng G. [Borderline EBV-positive T/NK-cell lymphoproliferative disease presenting with mosquito bite hypersensitivity]. Zhonghua Bing Li Xue Za Zhi 2023; 52:544-546. [PMID: 37106306 DOI: 10.3760/cma.j.cn112151-20221230-01086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Affiliation(s)
- Z P Liu
- Department of Pathology, First Affiliated Hospital, Army Medical University, Chongqing 400038, China
| | - Y L Wu
- Department of Pathology, First Affiliated Hospital, Army Medical University, Chongqing 400038, China
| | - G J Duan
- Department of Pathology, First Affiliated Hospital, Army Medical University, Chongqing 400038, China
| | - G Meng
- Department of Pathology, First Affiliated Hospital, Army Medical University, Chongqing 400038, China
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Bai L, Wang J, Liu LS, Cui SH, Guo YC, Li N, Liu ZP. [Implications for risk management of foodborne pathogens in China from the outbreak of monophasic salmonella enterica serovar Typhimurium contaminated chocolate products]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:1648-1656. [PMID: 36372758 DOI: 10.3760/cma.j.cn112150-20220712-00711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Outbreaks caused by highly industrialized food companies are characterized by cross-border, trans-regional, rapid and unpredictable, related to serious disease and economic burden. A cluster of cases with monophasic salmonella enterica serovar Typhimurium ST34 infection suspected to be associated with consumption of contaminated chocolate products have been reported in several Europe countries since December 2021. After retrospective investigations, the buttermilk circuit in the Belgian factory was suspected to be the point of origin of the contamination. This outbreak could provide a reference for the risk management of foodborne pathogens contamination in China. The objective of this paper was to summarize the process and characteristics of the outbreak of monophasic S. Typhimurium caused by contaminated chocolate products, analyze the characteristics of ST34 monophasic S. Typhimurium and the microbial management measures in the process of chocolate products, and systematically discuss the suggestions for the risk management of foodborne pathogens contamination and countermeasures for the rapid development of industrialization of food enterprises in China, in order to provide scientific and technological support for the prevention and control, prediction and early warning of sudden cases in China.
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Affiliation(s)
- L Bai
- NHC Key Laboratory of Food Safety Risk Assessment, Chinese Academy of Medical Sciences Research Unit (2019RU014), China National Center for Food Safety Risk Assessment, Beijing 100022, China
| | - J Wang
- College of Food Science and Technology, Qingdao Agricultural University, Qingdao 266109, China
| | - L S Liu
- NHC Key Laboratory of Food Safety Risk Assessment, Chinese Academy of Medical Sciences Research Unit (2019RU014), China National Center for Food Safety Risk Assessment, Beijing 100022, China
| | - S H Cui
- National Institutes for Food and Drug Control, Beijing 100050, China
| | - Y C Guo
- NHC Key Laboratory of Food Safety Risk Assessment, Chinese Academy of Medical Sciences Research Unit (2019RU014), China National Center for Food Safety Risk Assessment, Beijing 100022, China
| | - N Li
- NHC Key Laboratory of Food Safety Risk Assessment, Chinese Academy of Medical Sciences Research Unit (2019RU014), China National Center for Food Safety Risk Assessment, Beijing 100022, China
| | - Z P Liu
- NHC Key Laboratory of Food Safety Risk Assessment, Chinese Academy of Medical Sciences Research Unit (2019RU014), China National Center for Food Safety Risk Assessment, Beijing 100022, China
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Chen ZY, Liu ZP, Dai HS, Jiang Y, He Y. [The effect of prealbumin on the long-term prognosis of hilar cholangiocarcinoma following radical surgery]. Zhonghua Wai Ke Za Zhi 2022; 60:378-386. [PMID: 35272430 DOI: 10.3760/cma.j.cn112139-20211210-00592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To investigate the association between prealbumin and the long-term prognosis of patients with hilar cholangiocarcinoma(HCCA) following radical surgery. Methods: The clinical data of 262 HCCA patients who underwent radical surgery admitted from January 2010 to January 2017 at the First Affiliated Hospital of Army Medical University were collected,retrospectively. There were 158 males and 104 females; aged (57.6±9.9)years old(range:32 to 78 years). According to the preoperative serum prealbumin level(170 mg/L),the patients were divided into low prealbumin group(n=143) and normal prealbumin group(n=119). Follow-up until September 2020,the main research indicator was overall survival(OS), and the secondary research indicator was recurrence-free survival(RFS). The measurement data conforming to the normal distribution adopted the t test,the measurement data not conforming to the normal distribution adopted the Mann-Whitney U test,and the count data adopted the χ2 test. The Kaplan-Meier method was used to calculate the cumulative survival rate. The Log-rank test was used for univariate analysis of the cumulative survival rate. Variables with P<0.10 in univariate analysis were included in the Cox proportional hazards model for multivariate analysis. Results: The 1-, 3-, and 5-year OS rate of the 262 patients was 73.4%, 32.1%, and 24.0%, respectively, and the 1-, 3-, and 5-year RFS rate was 54.6%, 25.2%, and 16.2%, respectively. Median OS and RFS were 21 months and 12 months for patients with low prealbumin and 25 months and 19 months for patients with normal prealbumin. The OS rate and RFS rate of patients in the low prealbumin group were lower than those in the normal prealbumin group, and the difference was statistically significant (both P<0.05). The results of univariate analysis indicated that low prealbumin, CA19-9>150 U/L, tumor infiltration length>3 cm, preoperative jaundice, macrovascular invasion, microvascular invasion, lymph node metastasis, and poor differentiation maybe the risk factors of OS,and low prealbumin,tumor invasion length>3 cm,macrovascular invasion, microvascular invasion,lymph node metastasis,and poor differentiation maybe the risk factors of RFS for postoperative for radical resection in patients with HCCA (all P<0.10). Multivariate results suggested that low prealbumin,tumor invasion length>3 cm,microvascular invasion,lymph node metastasis,and poor differentiation were independent risk factors affecting OS and RFS in patients with HCCA after radical operation (all P<0.05). Conclusion: Preoperative prealbumin level can predict the long-term prognosis of patients with hilar cholangiocarcinoma following radical surgery.
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Affiliation(s)
- Z Y Chen
- People's Liberation Army Institute of Hepatobiliary Surgery, the First Affiliated Hospital of Army Medical University (Chongqing Southwest Hospital),Chongqing 400038, China
| | - Z P Liu
- People's Liberation Army Institute of Hepatobiliary Surgery, the First Affiliated Hospital of Army Medical University (Chongqing Southwest Hospital),Chongqing 400038, China
| | - H S Dai
- People's Liberation Army Institute of Hepatobiliary Surgery, the First Affiliated Hospital of Army Medical University (Chongqing Southwest Hospital),Chongqing 400038, China
| | - Y Jiang
- People's Liberation Army Institute of Hepatobiliary Surgery, the First Affiliated Hospital of Army Medical University (Chongqing Southwest Hospital),Chongqing 400038, China
| | - Y He
- People's Liberation Army Institute of Hepatobiliary Surgery, the First Affiliated Hospital of Army Medical University (Chongqing Southwest Hospital),Chongqing 400038, China
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Wang J, Lv F, Sun T, Zhao S, Chen H, Liu Y, Liu Z. Sorafenib Nanomicelles Effectively Shrink Tumors by Vaginal Administration for Preoperative Chemotherapy of Cervical Cancer. Nanomaterials (Basel) 2021; 11:nano11123271. [PMID: 34947619 PMCID: PMC8705954 DOI: 10.3390/nano11123271] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/28/2021] [Accepted: 11/29/2021] [Indexed: 12/24/2022]
Abstract
To investigate the potential of sorafenib (SF) in preoperative chemotherapy for cervical cancer to reduce tumor volume, sorafenib micelles (SF micelles) with good stability and high drug loading were designed. SF micelles were prepared by film hydration followed by the ultrasonic method. The results showed that the SF micelles were spherical with an average particle size of 67.18 ± 0.66 nm (PDI 0.17 ± 0.01), a considerable drug loading of 15.9 ± 0.46% (w/w%) and satisfactory stability in buffers containing plasma or not for at least 2 days. In vitro release showed that SF was gradually released from SF micelles and almost completely released on the third day. The results of in vitro cellular intake, cytotoxicity and proliferation of cervical cancer cell TC-1 showed that SF micelles were superior to sorafenib (Free SF). For intravaginal administration, SF micelles were dispersed in HPMC (SF micelles/HPMC), showed good viscosity sustained-release profiles in vitro and exhibited extended residence in intravaginal in vivo. Compared with SF micelles dispersed in N.S. (SF micelles/N.S.), SF micelles/HPMC significantly reduced tumor size with a tumor weight inhibition rate of 73%. The results suggested that SF micelles had good potential for preoperative tumor shrinkage and improving the quality life of patients.
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Affiliation(s)
- Jun Wang
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China;
| | - Fengmei Lv
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (F.L.); (T.S.); (S.Z.); (H.C.)
| | - Tao Sun
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (F.L.); (T.S.); (S.Z.); (H.C.)
| | - Shoujin Zhao
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (F.L.); (T.S.); (S.Z.); (H.C.)
| | - Haini Chen
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (F.L.); (T.S.); (S.Z.); (H.C.)
| | - Yu Liu
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China;
- Correspondence: (Y.L.); (Z.L.)
| | - Zhepeng Liu
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (F.L.); (T.S.); (S.Z.); (H.C.)
- Correspondence: (Y.L.); (Z.L.)
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Liu Z, Wang J, Chen H, Zhang G, Lv Z, Li Y, Zhao S, Li W. Coaxial Electrospun PLLA Fibers Modified with Water-Soluble Materials for Oligodendrocyte Myelination. Polymers (Basel) 2021; 13:polym13203595. [PMID: 34685353 PMCID: PMC8537353 DOI: 10.3390/polym13203595] [Citation(s) in RCA: 3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/14/2021] [Accepted: 10/15/2021] [Indexed: 12/15/2022] Open
Abstract
Myelin sheaths are essential in maintaining the integrity of axons. Development of the platform for in vitro myelination would be especially useful for demyelinating disease modeling and drug screening. In this study, a fiber scaffold with a core-shell structure was prepared in one step by the coaxial electrospinning method. A high-molecular-weight polymer poly-L-lactic acid (PLLA) was used as the core, while the shell was a natural polymer material such as hyaluronic acid (HA), sodium alginate (SA), or chitosan (CS). The morphology, differential scanning calorimetry (DSC), Fourier transform infrared spectra (FTIR), contact angle, viability assay, and in vitro myelination by oligodendrocytes were characterized. The results showed that such fibers are bead-free and continuous, with an average size from 294 ± 53 to 390 ± 54 nm. The DSC and FTIR curves indicated no changes in the phase state of coaxial brackets. Hyaluronic acid/PLLA coaxial fibers had the minimum contact angle (53.1° ± 0.24°). Myelin sheaths were wrapped around a coaxial electrospun scaffold modified with water-soluble materials after a 14-day incubation. All results suggest that such a scaffold prepared by coaxial electrospinning potentially provides a novel platform for oligodendrocyte myelination.
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Affiliation(s)
- Zhepeng Liu
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (H.C.); (Y.L.); (S.Z.)
- Correspondence: (Z.L.); (W.L.)
| | - Jing Wang
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (H.C.); (Y.L.); (S.Z.)
| | - Haini Chen
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (H.C.); (Y.L.); (S.Z.)
| | - Guanyu Zhang
- Department of Cell Biology, Second Military Medical University, Shanghai 200433, China; (G.Z.); (Z.L.)
| | - Zhuman Lv
- Department of Cell Biology, Second Military Medical University, Shanghai 200433, China; (G.Z.); (Z.L.)
| | - Yijun Li
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (H.C.); (Y.L.); (S.Z.)
| | - Shoujin Zhao
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (H.C.); (Y.L.); (S.Z.)
| | - Wenlin Li
- Department of Cell Biology, Second Military Medical University, Shanghai 200433, China; (G.Z.); (Z.L.)
- Correspondence: (Z.L.); (W.L.)
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Liu Z, Liang J, Chen S, Wang K, Liu X, Liu B, Xia Y, Guo M, Zhang X, Sun G, Tian G. Genome editing of CCR5 by AsCpf1 renders CD4 +T cells resistance to HIV-1 infection. Cell Biosci 2020; 10:85. [PMID: 32670545 PMCID: PMC7346486 DOI: 10.1186/s13578-020-00444-w] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [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: 01/21/2020] [Accepted: 06/15/2020] [Indexed: 12/20/2022] Open
Abstract
Background The chemokine receptor CCR5 is one of the co-receptor of HIV-1 infection. People with homozygous CCR5Δ32 deletion resist HIV-1 infection, which makes the CCR5 an important target for HIV-1 gene therapy. Although the CRISPR/Cas9 has ever been used for HIV-1 study, the newly developed CRISPR/AsCpf1 has never been utilized in HIV-1 co-receptor disruption. The CRISPR/Cpf1 system shows many advantages over CRISPR/Cas9, such as lower off-target, small size of nuclease, easy sgRNA design for multiplex gene editing, etc. Therefore, the CRISPR/Cpf1 mediated gene editing will confer a more specific and safe strategy in HIV-1 co-receptor disruption. Results Here, we demonstrated that CRISPR/AsCpf1 could ablate the main co-receptor of HIV-1 infection-CCR5 efficiently with two screened sgRNAs via different delivery strategies (lentivirus, adenovirus). The edited cells resisted R5-tropic HIV-1 infection but not X4-tropic HIV-1 infection compared with the control group in different cell types of HIV-1 study (TZM.bl, SupT1-R5, Primary CD4+T cells). Meanwhile, the edited cells exhibited selective advantage over unedited cells while under the pressure of R5-tropic HIV-1. Furthermore, we clarified that the predicted off-target sites of selected sgRNAs were very limited, which is much less than regular using sgRNAs for CRISPR/Cas9, and no evident off-target was observed. We also showed that the disruption of CCR5 by CRISPR/AsCpf1 took no effects on cell proliferation and apoptosis. Conclusions Our study provides a basis for a possible application of CCR5-targeting gene editing by CRISPR/AsCpf1 with high specific sgRNAs against HIV-1 infection.
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Affiliation(s)
- Zhepeng Liu
- Department of Biotherapy Research Center, Sun Yat-sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, Guangdong 510060 People's Republic of China.,Department of Oncology, The First Affiliated Hospital of Shenzhen University, The Second People's Hospital of Shenzhen, 3002 Sungang West Road, Shenzhen, 518035 People's Republic of China
| | - Jin Liang
- Department of Oncology, The First Affiliated Hospital of Shenzhen University, The Second People's Hospital of Shenzhen, 3002 Sungang West Road, Shenzhen, 518035 People's Republic of China
| | - Shuliang Chen
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People's Republic of China
| | - Kewu Wang
- Department of Oncology, The Second People's Hospital of Wuhu, Wuhu, 242401 People's Republic of China
| | - Xianhao Liu
- Department of Oncology, The First Affiliated Hospital of Shenzhen University, The Second People's Hospital of Shenzhen, 3002 Sungang West Road, Shenzhen, 518035 People's Republic of China
| | - Beibei Liu
- Department of Oncology, The First Affiliated Hospital of Shenzhen University, The Second People's Hospital of Shenzhen, 3002 Sungang West Road, Shenzhen, 518035 People's Republic of China
| | - Yang Xia
- Department of Oncology, The First Affiliated Hospital of Shenzhen University, The Second People's Hospital of Shenzhen, 3002 Sungang West Road, Shenzhen, 518035 People's Republic of China
| | - Mingxiong Guo
- College of Life Sciences, Wuhan University, Wuhan, 430071 People's Republic of China
| | - Xiaoshi Zhang
- Department of Biotherapy Research Center, Sun Yat-sen University Cancer Center, 651 Dongfeng East Road, Guangzhou, Guangdong 510060 People's Republic of China
| | - Guihong Sun
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People's Republic of China
| | - Geng Tian
- Department of Oncology, The First Affiliated Hospital of Shenzhen University, The Second People's Hospital of Shenzhen, 3002 Sungang West Road, Shenzhen, 518035 People's Republic of China
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11
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Liu ZP, Li XL, Pan JW, He HS, Tao QX. [Pelvic loose body: report of a case]. Zhonghua Bing Li Xue Za Zhi 2020; 49:277-278. [PMID: 32187904 DOI: 10.3760/cma.j.issn.0529-5807.2020.03.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Z P Liu
- Department of Pathology, the Second Hospital of Longyan, Fujian Province, Longyan 364000, China
| | - X L Li
- Department of Pathology, the Second Hospital of Longyan, Fujian Province, Longyan 364000, China
| | - J W Pan
- Department of Radiology, the Second Hospital of Longyan, Fujian Province, Longyan 364000, China
| | - H S He
- Department of General Surgery, the Second Hospital of Longyan, Fujian Province, Longyan 364000, China
| | - Q X Tao
- Department of Pathology, the Second Hospital of Longyan, Fujian Province, Longyan 364000, China
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12
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Li SZ, Tian ZX, Liu ZP. [A case of three-chimney technique treated anastomotic leakage in a patient with Standford type A aortic dissection]. Zhonghua Xin Xue Guan Bing Za Zhi 2019; 47:916-917. [PMID: 31744283 DOI: 10.3760/cma.j.issn.0253-3758.2019.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- S Z Li
- Department of Cardiothoracic Surgery, First Affiliated Hospital of Inner Mongolia Medical College, Hohhot 010059, China
| | - Z X Tian
- Department of Cardiothoracic Surgery, First Affiliated Hospital of Inner Mongolia Medical College, Hohhot 010059, China
| | - Z P Liu
- Department of Cardiothoracic Surgery, First Affiliated Hospital of Inner Mongolia Medical College, Hohhot 010059, China
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13
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Wang YW, Li XD, Sun MJ, Liu ZP, Liu SW. [Protective effects of berberine against exhaustion exercise induced myocardial injury in rats]. Zhonghua Xin Xue Guan Bing Za Zhi 2019; 47:647-652. [PMID: 31434437 DOI: 10.3760/cma.j.issn.0253-3758.2019.08.010] [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 investigate the effect and possible mechanism of berberine (Ber) on myocardial injury induced by exhaustion exercise (Ee). Methods: Forty healthy male SPF Sprague-Dawley rats were randomly divided into 5 groups using the random unit group design method: control group, Ee group and Ee plus Ber group (low: 50 mg·kg(-1)·d(-1), medium: 100 mg·kg(-1)·d(-1) and high dose: 150 mg·kg(-1)·d(-1), n=8 each). Ber (1.5 ml) or equal volume saline was given per gavage for 14 days. Rats assigned to Ee groups underwent Ee swimming once daily and rats in control group remain sedentary. After 14 days, echocardiographic measurements were performed and left ventricular ejection fraction (LVEF) and fractional shortening (LVFS), left ventricular diastolic diameter (LVIDd) and left ventricular systolic diameter (LVIDs) were obtained. The morphological structure of heart was detected by HE and Masson staining. Serum superoxide dismutase (SOD) and malondialdehyde (MDA) were measured by enzyme-linked immunosorbent assay. Cardiomyocytes apoptosis was detected by TUNEL method. The protein expression of myocardial hypertrophy marker protein B-type natriuretic peptide (BNP) and apoptotic marker protein (Bcl-2, Bax) in rat myocardial tissue was detected by Western blot. Results: (1) Both LVFS and LVEF were significantly lower, and LVIDs and LVIDd were significantly larger in Ee group than those in control group (all P<0.01). The LVFS and LVEF in medium dose of Ber and high-dose Ber groups were significantly higher, and the LVIDs and LVIDd were significantly smaller than those in Ee group (all P<0.01). (2) The results of HE staining showed that the myocardial cells in control group were closely arranged, regular, normal in morphology, clear in structure, and uniform in staining. The myocardial cells of rats in Ee group were disarranged, cell staining was uneven, and vacuoles appeared in the cytoplasm. The disorder of myocardial cell arrangement and unequal staining in the medium dose of Ber were attenuated than in Ee group. The Masson staining results showed that the myocardial cells in control group were closely arranged, regular, normal in shape, clear in structure, and rarely blue-stained (fibrosis). Myocardial cells in rats in Ee group showed obvious fibrosis. The myocardial cell fibrosis in rats with medium dose of Ber was significantly reduced than exercise group. (3) MDA content in myocardial tissue of rats in Ee group was significantly higher than that of control group, and MDA content in myocardial tissue of rats in medium dose of Ber group was significantly lower than in Ee group (P<0.01). The SOD activity of myocardial tissue in rats was significantly lower than that of control group, while that of rats with medium dose of Ber was significantly higher than that of rats in Ee group (P<0.01). (4) TUNEL staining results showed that only a small amount of apoptosis myocardial cells were seen in control group, and a large number of apoptosis myocardial cells were seen in rats in Ee group. However, the number of apoptotic cardiomyocytes in medium dose of Ber was significantly lower than that in Ee group. The AI of rat cardiomyocytes was significantly higher than that of control group (P<0.01), and the AI of rat cardiomyocytes in median dose of Ber group was significantly lower than in Ee group (P<0.01). (5) BNP and Bax protein expression in the myocardial tissues of rats in Ee group were significantly higher than in control group (P<0.01). BNP and Bax protein expression in the myocardial tissues in median dose of Ber group were significantly lower than that of Ee group (P<0.01). The myocardial protein expression level of Bax was significantly higher, and the myocardial protein level of Bcl-2 was significantly lower in Ee group than in control group (both P<0.01), treatment with median dose of Ber could partly reverse above changes (both P<0.01). Conclusion: Ber can attenuate exhaustion exercise induced myocardial injury and remodeling in rats, and the beneficial effects of Ber might possibly be mediated by reducing free radical release and cardiomyocytes apoptosis.
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Affiliation(s)
- Y W Wang
- Department of Sports, Daqing Campus of Harbin Medical University, Daqing 163316, China
| | - X D Li
- Department of Sports, Daqing Campus of Harbin Medical University, Daqing 163316, China
| | - M J Sun
- Department of Sports, Daqing Campus of Harbin Medical University, Daqing 163316, China
| | - Z P Liu
- Department of Cardiology, Fifth Affiliated Hospital of Harbin Medical University, Daqing 163316, China
| | - S W Liu
- Department of Cardiology, Fifth Affiliated Hospital of Harbin Medical University, Daqing 163316, China
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Xiao Q, Chen S, Wang Q, Liu Z, Liu S, Deng H, Hou W, Wu D, Xiong Y, Li J, Guo D. Correction to: CCR5 editing by Staphylococcus aureus Cas9 in human primary CD4 + T cells and hematopoietic stem/progenitor cells promotes HIV-1 resistance and CD4 + T cell enrichment in humanized mice. Retrovirology 2019; 16:20. [PMID: 31337409 PMCID: PMC6647316 DOI: 10.1186/s12977-019-0482-1] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 07/10/2019] [Indexed: 11/16/2022] Open
Affiliation(s)
- Qiaoqiao Xiao
- Laboratory of Medical Virology, School of Medicine, Sun Yat-sen University, Zhongshan Erlu 74, Yuexiu District, Guangzhou, 510080, People's Republic of China.,Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Shuliang Chen
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China.
| | - Qiankun Wang
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Zhepeng Liu
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Shuai Liu
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Huan Deng
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Wei Hou
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Dongcheng Wu
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Yong Xiong
- Department of Pathology, Zhongnan Hospital, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Jiafu Li
- Department of Pathology, Zhongnan Hospital, Wuhan University, Wuhan, 430071, People's Republic of China
| | - Deyin Guo
- Laboratory of Medical Virology, School of Medicine, Sun Yat-sen University, Zhongshan Erlu 74, Yuexiu District, Guangzhou, 510080, People's Republic of China.
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15
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Xiao Q, Chen S, Wang Q, Liu Z, Liu S, Deng H, Hou W, Wu D, Xiong Y, Li J, Guo D. CCR5 editing by Staphylococcus aureus Cas9 in human primary CD4 + T cells and hematopoietic stem/progenitor cells promotes HIV-1 resistance and CD4 + T cell enrichment in humanized mice. Retrovirology 2019; 16:15. [PMID: 31186067 PMCID: PMC6560749 DOI: 10.1186/s12977-019-0477-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Accepted: 06/07/2019] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND The chemokine receptor CCR5, which belongs to the superfamily of G protein-coupled receptors, is the major co-receptor for HIV-1 entry. Individuals with a homozygous CCR5Δ32 mutation have a long lasting and increased resistance to HIV-1 infection. Therefore, CCR5 represents an optimal target for HIV-1/AIDS gene therapy. The CRISPR/Cas9 system has been developed as one of the most efficacious gene editing tools in mammalian cells and the small-sized version from Staphylococcus aureus (SaCas9) has an advantage of easier delivery compared to the most commonly used version from Streptococcus pyogenes Cas9 (SpCas9). RESULTS Here, we demonstrated that CCR5 could be specifically and efficiently edited by CRISPR/SaCas9 together with two sgRNAs, which were identified through a screening of 13 sgRNAs. Disruption of CCR5 expression by lentiviral vector-mediated CRISPR/SaCas9 led to increased resistance against HIV-1 infection in human primary CD4+ T cells. Moreover, humanized mice engrafted with CCR5-disrupted CD4+ T cells showed selective survival and enrichment when challenged with CCR5 (R5)-tropic HIV-1 in comparison to mock-treated CD4+ T cells. We also observed CCR5 could be targeted by CRISPR/SaCas9 in human CD34+ hematopoietic stem/progenitor cells without obvious differentiation deficiencies. CONCLUSIONS This work provides an alternative approach to disrupt human CCR5 by CRISPR/SaCas9 for a potential gene therapy strategy against HIV-1/AIDS.
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Affiliation(s)
- Qiaoqiao Xiao
- Laboratory of Medical Virology, School of Medicine, Sun Yat-sen University, Zhongshan Erlu 74, Yuexiu District, Guangzhou, 510080 People’s Republic of China
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Shuliang Chen
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Qiankun Wang
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Zhepeng Liu
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Shuai Liu
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Huan Deng
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Wei Hou
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Dongcheng Wu
- Institute of Medical Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Yong Xiong
- Department of Pathology, Zhongnan Hospital, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Jiafu Li
- Department of Pathology, Zhongnan Hospital, Wuhan University, Wuhan, 430071 People’s Republic of China
| | - Deyin Guo
- Laboratory of Medical Virology, School of Medicine, Sun Yat-sen University, Zhongshan Erlu 74, Yuexiu District, Guangzhou, 510080 People’s Republic of China
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16
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Huang ZG, Lv FM, Wang J, Cao SJ, Liu ZP, Liu Y, Lu WY. RGD-modified PEGylated paclitaxel nanocrystals with enhanced stability and tumor-targeting capability. Int J Pharm 2019; 556:217-225. [DOI: 10.1016/j.ijpharm.2018.12.023] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 11/20/2018] [Accepted: 12/06/2018] [Indexed: 12/25/2022]
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17
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Liu S, Yu X, Wang Q, Liu Z, Xiao Q, Hou P, Hu Y, Hou W, Yang Z, Guo D, Chen S. Specific Expression of Interferon-γ Induced by Synergistic Activation Mediator-Derived Systems Activates Innate Immunity and Inhibits Tumorigenesis. J Microbiol Biotechnol 2018; 27:1855-1866. [PMID: 28838224 DOI: 10.4014/jmb.1705.05081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The synergistic activation mediator (SAM) system can robustly activate endogenous gene expression by a single-guide RNA. This transcriptional modulation has been shown to enhance gene promoter activity and leads to epigenetic changes. Human interferon-γ is a common natural glycoprotein involved in antiviral effects and inhibition of cancer cell growth. Large quantities of high-purity interferon-γ are important for medical research and clinical therapy. To investigate the possibility of employing the SAM system to enhance endogenous human interferon-γ with normal function in innate immunity, we designed 10 single-guide RNAs that target 200 bp upstream of the transcription start sites of the interferon-γ genome, which could significantly activate the interferon-γ promoter reporter. We confirmed that the system can effectively and highly activate interferon-γ expression in several humanized cell lines. Moreover, we found that the interferon-γ induced by the SAM system could inhibit tumorigenesis. Taken together, our results reveal that the SAM system can modulate epigenetic traits of non-immune cells through activating interferon-γ expression and triggering JAK-STAT signaling pathways. Thus, this strategy could offer a novel approach to inhibit tumorigenesis without using exogenous interferon-γ.
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Affiliation(s)
- Shuai Liu
- School of Basic Medical Sciences, Wuhan University, Wuhan 430071, P.R. China
| | - Xiao Yu
- Institute for Infectious Disease Control and Prevention, Hubei Provincial Center for Disease Control and Prevention, Wuhan 430079, P.R. China
| | - Qiankun Wang
- School of Basic Medical Sciences, Wuhan University, Wuhan 430071, P.R. China
| | - Zhepeng Liu
- School of Basic Medical Sciences, Wuhan University, Wuhan 430071, P.R. China
| | - Qiaoqiao Xiao
- School of Basic Medical Sciences, Wuhan University, Wuhan 430071, P.R. China
| | - Panpan Hou
- College of Life Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Ying Hu
- College of Life Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Wei Hou
- School of Basic Medical Sciences, Wuhan University, Wuhan 430071, P.R. China
| | - Zhanqiu Yang
- School of Basic Medical Sciences, Wuhan University, Wuhan 430071, P.R. China
| | - Deyin Guo
- School of Basic Medical Sciences, Wuhan University, Wuhan 430071, P.R. China.,School of Medicine (Shenzhen), Sun Yat-sen University, Guangzhou 510080, P.R. China
| | - Shuliang Chen
- School of Basic Medical Sciences, Wuhan University, Wuhan 430071, P.R. China.,Center for Retrovirus Research, Department of Veterinary Biosciences, The Ohio State University, Columbus, OH 43210, USA
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18
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Wang Q, Liu S, Liu Z, Ke Z, Li C, Yu X, Chen S, Guo D. Genome scale screening identification of SaCas9/gRNAs for targeting HIV-1 provirus and suppression of HIV-1 infection. Virus Res 2018; 250:21-30. [PMID: 29625148 DOI: 10.1016/j.virusres.2018.04.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 04/02/2018] [Accepted: 04/02/2018] [Indexed: 01/06/2023]
Abstract
The CRISPR/Cas9 gene-editing approach has been widely used in anti-HIV-1 gene therapy research. However, the major challenges facing the therapeutic application of CRISPR/Cas9 are the precise genome cleavage efficacy and efficient delivery of Cas9/gRNA specifically to the HIV-infected cells. Recently, a small size Cas9 from Staphylococcus aureus (SaCas9) has shown promise in genome editing in eukaryotic cells, suggesting a potential usage in blocking HIV-1 infection by targeting the HIV-1 genome. Here, we designed 43 guide RNAs (gRNAs) against the HIV-1 genome, thereby identifying 8 gRNAs that efficiently and specifically disrupt the target DNA by SaCas9. In addition, we found the selected gRNAs induce SaCas9 to disrupt the latent HIV-1 provirus and suppress HIV-1 proviral reactivation in latently infected Jurkat C11 cells. We further confirmed that the dual or triple gRNAs in an all-in-one lentiviral vector could reduce viral production in TZM-bl cells as well as in Jurkat T cells. Moreover, we did not detect any off-target cleavages in the predicted sites, suggesting that through all-in-one lentiviral vector-mediated HIV-1 genome editing, the selected SaCas9/gRNAs can provide an alternative and flexible strategy for anti-HIV gene therapy.
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Affiliation(s)
- Qiankun Wang
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PR China.
| | - Shuai Liu
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PR China.
| | - Zhepeng Liu
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PR China.
| | - Zunhui Ke
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PR China.
| | - Chunmei Li
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PR China; School of Medicine (Shenzhen), Sun Yat-sen University, Guangzhou 510080, PR China.
| | - Xiao Yu
- Institute of health inspection and testing, Hubei Provincial Center for Disease Control and Prevention, Zhuodaoquan North Road 6, Wuhan 430079, Hubei, PR China.
| | - Shuliang Chen
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PR China; Center for Retrovirus Research, Department of Veterinary Biosciences, The Ohio State University, 1900 Coffey Road, Columbus, OH 43210, USA.
| | - Deyin Guo
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430071, PR China; School of Medicine (Shenzhen), Sun Yat-sen University, Guangzhou 510080, PR China.
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19
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Liu Z, Chen S, Jin X, Wang Q, Yang K, Li C, Xiao Q, Hou P, Liu S, Wu S, Hou W, Xiong Y, Kong C, Zhao X, Wu L, Li C, Sun G, Guo D. Genome editing of the HIV co-receptors CCR5 and CXCR4 by CRISPR-Cas9 protects CD4 + T cells from HIV-1 infection. Cell Biosci 2017; 7:47. [PMID: 28904745 PMCID: PMC5591563 DOI: 10.1186/s13578-017-0174-2] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [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: 06/29/2017] [Accepted: 09/01/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The main approach to treat HIV-1 infection is combination antiretroviral therapy (cART). Although cART is effective in reducing HIV-1 viral load and controlling disease progression, it has many side effects, and is expensive for HIV-1 infected patients who must remain on lifetime treatment. HIV-1 gene therapy has drawn much attention as studies of genome editing tools have progressed. For example, zinc finger nucleases (ZFN), transcription activator like effector nucleases (TALEN) and clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 have been utilized to successfully disrupt the HIV-1 co-receptors CCR5 or CXCR4, thereby restricting HIV-1 infection. However, the effects of simultaneous genome editing of CXCR4 and CCR5 by CRISPR-Cas9 in blocking HIV-1 infection in primary CD4+ T cells has been rarely reported. Furthermore, combination of different target sites of CXCR4 and CCR5 for disruption also need investigation. RESULTS In this report, we designed two different gRNA combinations targeting both CXCR4 and CCR5, in a single vector. The CRISPR-sgRNAs-Cas9 could successfully induce editing of CXCR4 and CCR5 genes in various cell lines and primary CD4+ T cells. Using HIV-1 challenge assays, we demonstrated that CXCR4-tropic or CCR5-tropic HIV-1 infections were significantly reduced in CXCR4- and CCR5-modified cells, and the modified cells exhibited a selective advantage over unmodified cells during HIV-1 infection. The off-target analysis showed that no non-specific editing was identified in all predicted sites. In addition, apoptosis assays indicated that simultaneous disruption of CXCR4 and CCR5 in primary CD4+ T cells by CRISPR-Cas9 had no obvious cytotoxic effects on cell viability. CONCLUSIONS Our results suggest that simultaneous genome editing of CXCR4 and CCR5 by CRISPR-Cas9 can potentially provide an effective and safe strategy towards a functional cure for HIV-1 infection.
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Affiliation(s)
- Zhepeng Liu
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Shuliang Chen
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China.,Center for Retrovirus Research, Department of Veterinary Biosciences, The Ohio State University, Columbus, USA
| | - Xu Jin
- Guangxi Center for Disease Control and Prevention, Nanning, Guangxi People's Republic of China
| | - Qiankun Wang
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Kongxiang Yang
- College of Life Science, Wuhan University, Wuhan, People's Republic of China
| | - Chenlin Li
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Qiaoqiao Xiao
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Panpan Hou
- College of Life Science, Wuhan University, Wuhan, People's Republic of China
| | - Shuai Liu
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Shaoshuai Wu
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Wei Hou
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Yong Xiong
- Zhongnan Hospital, Wuhan University, Wuhan, People's Republic of China
| | - Chunyan Kong
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Xixian Zhao
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Li Wu
- Center for Retrovirus Research, Department of Veterinary Biosciences, The Ohio State University, Columbus, USA
| | - Chunmei Li
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China.,School of Medicine (Shenzhen), Sun Yat-sen University, Guangzhou, 510080 People's Republic of China
| | - Guihong Sun
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China
| | - Deyin Guo
- School of Basic Medical Sciences, Wuhan University, Wuhan, 430072 People's Republic of China.,School of Medicine (Shenzhen), Sun Yat-sen University, Guangzhou, 510080 People's Republic of China
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Ci L, Huang Z, Liu Y, Liu Z, Wei G, Lu W. Amino-functionalized poloxamer 407 with both mucoadhesive and thermosensitive properties: preparation, characterization and application in a vaginal drug delivery system. Acta Pharm Sin B 2017; 7:593-602. [PMID: 28924553 PMCID: PMC5595263 DOI: 10.1016/j.apsb.2017.03.002] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [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: 01/24/2017] [Revised: 02/23/2017] [Accepted: 03/07/2017] [Indexed: 12/21/2022] Open
Abstract
Lack of mucoadhesive properties is the major drawback to poloxamer 407 (F127)-based in situ hydrogels for mucosal administration. The objective of the present study was to construct a novel mucoadhesive and thermosensitive in situ hydrogel drug delivery system based on an amino-functionalized poloxamer for vaginal administration. First, amino-functionalized poloxamer 407 (F127-NH2) was synthesized and characterized with respect to its micellization behavior and interaction with mucin. Then using acetate gossypol (AG) as model drug, AG-loaded F127-NH2-based in situ hydrogels (NFGs) were evaluated with respect to rheology, drug release, ex vivo vaginal mucosal adhesion, in vivo intravaginal retention and local irritation after vaginal administration to healthy female mice. The results show that F127-NH2 is capable of forming a thermosensitive in situ hydrogel with sustained drug release properties. An interaction between positively charged F127-NH2 and negatively charged mucin was revealed by changes in the particle size and zeta potential of mucin particles as well as an increase in the complex modulus of NFG caused by mucin. Ex vivo and in vivo fluorescence imaging and quantitative analysis of the amount of AG remaining in mouse vaginal lavage all demonstrated greater intravaginal retention of NFG than that of an unmodified F127-based in situ hydrogel. In conclusion, amino group functionalization confers valuable mucoadhesive properties on poloxamer 407.
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Key Words
- ACN, anhydrous acetonitrile
- AG, acetate gossypol
- AG-loaded FG, F127 gel-loaded with acetate gossypol
- AG-loaded NFG, F127-NH2 gel-loaded with acetate gossypol
- ANOVA, one-way analysis of variance
- Acetate gossypol
- Amino group
- C6, 6-coumarin
- CDI, carbonyl diimidazole
- CMC, critical micelle concentration
- DAPI, 2-(4-amidinophenyl)-6-indolecarbamindine dihydrochloride
- DLS, dynamic light scattering
- DPH, 1,6-diphenyl-1,3,5-hexatriene
- DTT, dithiothreitol
- DiR, 1,1ʹ-dioctadecyl-3,3,3ʹ,3ʹ-tetramethylindotricarbocyanine iodide
- EDTA, ethylenediamine tetraacetic acid
- EMS, endometriosis
- F127, Pluronic F127
- FG, F127 gel
- FTIR, Fourier transform infrared
- H&E, hematoxylin and eosin
- ICR, Institute of Cancer Research
- In situ hydrogel
- Mucoadhesive gel
- NF, amino-functionalised poloxamer 407
- NFG, aminated poloxamer 407-based temperature sensitive hydrogel
- NMR, nuclear magnetic resonance
- OCT, optical coherence tomography
- PBS, phosphate buffered saline
- PDI, polydispersity index
- PEO, poly(ethylene oxide)
- PGM, porcine gastric mucin
- PPO, poly(propylene oxide)
- Poloxamer 407
- TEM, transmission electron microscopy
- VFS, vaginal fluid stimulant
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Affiliation(s)
- Liqian Ci
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Zhigang Huang
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Yu Liu
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China
| | - Zhepeng Liu
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Gang Wei
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China
| | - Weiyue Lu
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China
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Yong L, Zhang L, Wang YBN, Yang DJ, Liu ZP, Wang T, Huang JP, Zhou PP. [Liquid milk exposure and risk assessment of thiocyanate in Chinese populations]. Zhonghua Yu Fang Yi Xue Za Zhi 2017; 51:332-335. [PMID: 28395467 DOI: 10.3760/cma.j.issn.0253-9624.2017.04.010] [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] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To analyze liquid milk exposure of thiocyanate among Chinese population and preliminarily assess its health risk. Methods: A total of 2 059 raw milk samples were collected during 2013 and 2014 from 12 Chinese provinces, New Zealand and Netherlands. Farms were chosed according to the main sources of dairy companies, the distribution of farms and the yield of milk. Content of thiocyanate were detected by ion chromatography. Liquid milk consumption data were taken from Chinese beverage and alcoholic beverage consumption survey in 18 cities or counties in 9 provinces, including 16 775 subjects older than 3. A simple distribution model was used to estimate the exposure of thiocyanate from liquid milk. The tolerable daily intake (TDI) of thiocyanate was made 0.08 mg·kg(-1)·d(-1). Then the exposures of different age groups were compared with TDI. Results: Finally, 1 331 samples out of 2 059 were detected to contain thiocyanate. The detection rate was 65%. The average concentration of thiocyanate was 2.11 mg/kg, with a range of 0.10-16.20 mg/kg. The general population's consumption of thiocyanate by drinking liquid milk was 0.001 mg · kg(-1) · d(-1), which was lower than TDI. The P(95) of general population and consumers were 0.009 mg · kg(-1) · d(-1) and 0.020 mg·kg( -1)·d(-1) respectively, which were also lower than TDI. Mean exposures of population aged 3-6, 7-12, 13-17, 18-59 as well as elderly aged 60 and above were 0.007, 0.003, 0.002, 0.001 and 0.001 mg · kg(-1)·d(-1) respectively, which were all lower than TDI. Conclusion: The results suggested that the health risk of thiocyanate exposure by drinking liquid milk among Chinese population was at a low level. However, milk products for children deserve more concern.
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Affiliation(s)
- L Yong
- China National Center for Food Safety Risk Assessment, Beijing 100022, China
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Liu Z, Huang Z, Ci L, Lu L, Liu Z, Yan X, Yan Z, Yu L, Liu Y, Lu W. Co-administration of tLyp-1 with polymeric paclitaxel conjugates: Enhanced intratumoral accumulation and anti-tumor efficacy. Pharmazie 2017; 72:205-208. [PMID: 29441988 DOI: 10.1691/ph.2017.6096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
BACKGROUND It has been previously demonstrated that conjugation of paclitaxel to a linear poly(l-γ-glutamylglutamine) backbone can enhance water solubility of paclitaxel. However, intratumoral penetration of the nanoscale poly(l-γ-glutamylglutamine)-paclitaxel conjugate (PGG-PTX) was still limited due to dysfunctional tumor blood vessels as well as high interstitial pressure in the tumor microenvironment. PURPOSE The objective of the present research was to investigate the feasibility of co-administration of a tumor penetration enhancing peptide tLyp-1 for improving intratumoral accumulation and consequent anti-tumor efficacy of PGG-PTX. METHODS The influence of co-administration of tLyP-1 with PGG-PTX on intratumoral accumulation (via HPLC-MS/MS) and anti-tumor efficacy (by monitoring the change in the tumor volume) was investigated using a breast cancer (4T1) tumor-bearing mouse model. In addition, the systemic toxicity of co-administration of tLyP-1 with PGG-PTX was assessed by monitoring the change in the animal body weight. RESULTS It was observed that co-administration of tLyP-1 with PGG-PTX dramatically improved PGG-PTX accumulation in the tumors, resulting in improved inhibition efficiency against tumor growth. Moreover, co-administration of tLyP-1 with PGG-PTX did not change the systemic toxicity profile of PGG-PTX. CONCLUSION Co-administration of tLyp-1 may be a promising strategy for improving the passive tumortargeting performance of polymeric drug conjugates.
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Wu CB, Huang GH, Liu ZP, Zhen JL, Yin JG. Scenario analysis of carbon emissions' anti-driving effect on Qingdao's energy structure adjustment with an optimization model, Part II: Energy system planning and management. J Environ Manage 2017; 188:120-136. [PMID: 28006740 DOI: 10.1016/j.jenvman.2016.12.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 01/14/2016] [Revised: 11/26/2016] [Accepted: 12/02/2016] [Indexed: 06/06/2023]
Abstract
In this study, an inexact multistage stochastic mixed-integer programming (IMSMP) method was developed for supporting regional-scale energy system planning (EPS) associated with multiple uncertainties presented as discrete intervals, probability distributions and their combinations. An IMSMP-based energy system planning (IMSMP-ESP) model was formulated for Qingdao to demonstrate its applicability. Solutions which can provide optimal patterns of energy resources generation, conversion, transmission, allocation and facility capacity expansion schemes have been obtained. The results can help local decision makers generate cost-effective energy system management schemes and gain a comprehensive tradeoff between economic objectives and environmental requirements. Moreover, taking the CO2 emissions scenarios mentioned in Part I into consideration, the anti-driving effect of carbon emissions on energy structure adjustment was studied based on the developed model and scenario analysis. Several suggestions can be concluded from the results: (a) to ensure the smooth realization of low-carbon and sustainable development, appropriate price control and fiscal subsidy on high-cost energy resources should be considered by the decision-makers; (b) compared with coal, natural gas utilization should be strongly encouraged in order to insure that Qingdao could reach the carbon discharges peak value in 2020; (c) to guarantee Qingdao's power supply security in the future, the construction of new power plants should be emphasised instead of enhancing the transmission capacity of grid infrastructure.
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Affiliation(s)
- C B Wu
- MOE Key Laboratory of Regional Energy and Environmental Systems Optimization, S-C Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China
| | - G H Huang
- MOE Key Laboratory of Regional Energy and Environmental Systems Optimization, S-C Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China.
| | - Z P Liu
- MOE Key Laboratory of Regional Energy and Environmental Systems Optimization, S-C Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China
| | - J L Zhen
- MOE Key Laboratory of Regional Energy and Environmental Systems Optimization, S-C Resources and Environmental Research Academy, North China Electric Power University, Beijing 102206, China
| | - J G Yin
- State Grid Shandong Electric Power Research Institute, Jinan 250002, China
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Zeng XT, Huang GH, Li YP, Zhang JL, Cai YP, Liu ZP, Liu LR. Development of a fuzzy-stochastic programming with Green Z-score criterion method for planning water resources systems with a trading mechanism. Environ Sci Pollut Res Int 2016; 23:25245-25266. [PMID: 27687761 DOI: 10.1007/s11356-016-7595-z] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Accepted: 09/04/2016] [Indexed: 06/06/2023]
Abstract
This study developed a fuzzy-stochastic programming with Green Z-score criterion (FSGZ) method for water resources allocation and water quality management with a trading-mechanism (WAQT) under uncertainties. FSGZ can handle uncertainties expressed as probability distributions, and it can also quantify objective/subjective fuzziness in the decision-making process. Risk-averse attitudes and robustness coefficient are joined to express the relationship between the expected target and outcome under various risk preferences of decision makers and systemic robustness. The developed method is applied to a real-world case of WAQT in the Kaidu-Kongque River Basin in northwest China, where an effective mechanism (e.g., market trading) to simultaneously confront severely diminished water availability and degraded water quality is required. Results of water transaction amounts, water allocation patterns, pollution mitigation schemes, and system benefits under various scenarios are analyzed, which indicate that a trading-mechanism is a more sustainable method to manage water-environment crisis in the study region. Additionally, consideration of anthropogenic (e.g., a risk-averse attitude) and systemic factors (e.g., the robustness coefficient) can support the generation of a robust plan associated with risk control for WAQT when uncertainty is present. These findings assist local policy and decision makers to gain insights into water-environment capacity planning to balance the basin's social and economic growth with protecting the region's ecosystems.
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Affiliation(s)
- X T Zeng
- Capital University of Economics and Business, Beijing, 10070, China
- Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina, SK, S4S 0A2, Canada
| | - G H Huang
- Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina, SK, S4S 0A2, Canada.
- College of Environment, Beijing Normal University, Beijing, 100875, China.
| | - Y P Li
- Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina, SK, S4S 0A2, Canada.
- College of Environment, Beijing Normal University, Beijing, 100875, China.
| | - J L Zhang
- MOE Key Laboratory of Regional Energy Systems Optimization, North China Electric Power University, Beijing, 102206, China
| | - Y P Cai
- College of Environment, Beijing Normal University, Beijing, 100875, China
| | - Z P Liu
- MOE Key Laboratory of Regional Energy Systems Optimization, North China Electric Power University, Beijing, 102206, China
| | - L R Liu
- Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina, SK, S4S 0A2, Canada
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25
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Liu Z, Song F, Ma ZL, Xiong Q, Wang J, Guo D, Sun G. Bivalent Copper Ions Promote Fibrillar Aggregation of KCTD1 and Induce Cytotoxicity. Sci Rep 2016; 6:32658. [PMID: 27596723 PMCID: PMC5011690 DOI: 10.1038/srep32658] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 08/11/2016] [Indexed: 01/04/2023] Open
Abstract
Potassium channel tetramerization domain containing 1 (KCTD1) family members have a BTB/POZ domain, which can facilitate protein-protein interactions involved in the regulation of different signaling pathways. KCTD proteins have potential Zn(2+)/Cu(2+) binding sites with currently unknown structural and functional roles. We investigated potential Cu(2+)-specific effects on KCTD1 using circular dichroism, turbidity measurement, fluorescent dye binding, proteinase K (PK) digestion, cell proliferation and apoptosis assays. These experiments indicate that the KCTD1 secondary structure assumes greater β-sheet content and the proteins aggregate into a PK-resistant form under 20 μM Cu(2+), and this β-sheet-rich aggregation with Cu(2+) promotes fibril formation, which results in increased cell toxicity by apoptosis. Our results reveal a novel role for Cu(2+) in determining the structure and function of KCTD1.
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Affiliation(s)
- Zhepeng Liu
- School of Basic Medical Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Feifei Song
- School of Basic Medical Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Zhi-li Ma
- School of Basic Medical Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Qiushuang Xiong
- School of Basic Medical Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Jingwen Wang
- School of Basic Medical Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Deyin Guo
- School of Basic Medical Sciences, Wuhan University, Wuhan 430072, P.R. China
| | - Guihong Sun
- School of Basic Medical Sciences, Wuhan University, Wuhan 430072, P.R. China
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26
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Liu D, Cui L, Wang Y, Yang G, He J, Hao R, Fan C, Qu M, Liu Z, Wang M, Chen L, Li H, Guo D. Hepatitis B e antigen and its precursors promote the progress of hepatocellular carcinoma by interacting with NUMB and decreasing p53 activity. Hepatology 2016; 64:390-404. [PMID: 27106262 DOI: 10.1002/hep.28594] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 03/05/2016] [Accepted: 03/24/2016] [Indexed: 01/04/2023]
Abstract
UNLABELLED Hepatitis B viral infection is one of the leading causes of hepatocellular carcinoma (HCC) worldwide. Although several viral factors have been identified that may increase the risk for HCC development, the molecular mechanisms leading to the transformation of normal hepatocytes into cancer cells remain elusive. In this study, we demonstrated that the intracellular hepatitis B e antigen (HBeAg) and its precore precursors, but not their homologous core protein, could associate with NUMB and thereby impair the stability and transcriptional activity of tumor suppressor p53. HBeAg and its precursors could disrupt p53-NUMB and HDM2-NUMB interactions and tricomplex p53-HDM2-NUMB formation, inhibit the acetylation and translocation of p53 from cytosol to the nucleus, promote HDM2-mediated ubiquitination and degradation of p53, and suppress p53-dependent apoptosis. A xenograft tumorigenicity assay showed that expression of HBeAg and its precursors promoted carcinogenesis in a mouse model. Immunohistochemical analysis of the bioptic liver samples of HCC patients revealed that HBeAg positivity was associated with reduced transcriptional activity of p53. Taken together, the results suggest a role of intracellular HBeAg and its precursors in HCC development. CONCLUSION HBeAg and its precursors promote HDM2-mediated degradation and impair transcriptional activity of p53 by interacting with NUMB, consequently contributing to HCC development. (Hepatology 2016;64:390-404).
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Affiliation(s)
- Dan Liu
- State Key Laboratory of Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Lei Cui
- Modern Virology Research Center, College of Life Sciences, Wuhan University, Wuhan, P.R. China
| | - Yuan Wang
- State Key Laboratory of Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Guifang Yang
- Department of Pathology, Zhongnan Hospital, Wuhan University, Wuhan, P.R. China
| | - Jing He
- Modern Virology Research Center, College of Life Sciences, Wuhan University, Wuhan, P.R. China
| | - Ruidong Hao
- Modern Virology Research Center, College of Life Sciences, Wuhan University, Wuhan, P.R. China
| | - Chengpeng Fan
- State Key Laboratory of Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Mengmeng Qu
- State Key Laboratory of Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Zhepeng Liu
- State Key Laboratory of Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Min Wang
- State Key Laboratory of Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Lang Chen
- State Key Laboratory of Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Hui Li
- State Key Laboratory of Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
| | - Deyin Guo
- State Key Laboratory of Virology, School of Basic Medical Sciences, Wuhan University, Wuhan, P.R. China
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Zhu M, Wang XR, Li J, Li GY, Liu ZP, Mo ZL. Identification and virulence properties of Aeromonas veronii bv. sobria isolates causing an ulcerative syndrome of loach Misgurnus anguillicaudatus. J Fish Dis 2016; 39:777-781. [PMID: 26525163 DOI: 10.1111/jfd.12413] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 07/21/2015] [Accepted: 07/24/2015] [Indexed: 06/05/2023]
Affiliation(s)
- M Zhu
- College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
- College of Marine Science, Huaihai Institute of Technology, Lianyungang, China
| | - X R Wang
- Key Laboratory of Sustainable Development of Marine Fisheries, The Ministry of Agriculture, Qingdao, China
- College of Marine Life Sciences, Ocean University of China, Qingdao, China
| | - J Li
- Key Laboratory of Sustainable Development of Marine Fisheries, The Ministry of Agriculture, Qingdao, China
| | - G Y Li
- Key Laboratory of Sustainable Development of Marine Fisheries, The Ministry of Agriculture, Qingdao, China
| | - Z P Liu
- College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing, China
| | - Z L Mo
- Key Laboratory of Sustainable Development of Marine Fisheries, The Ministry of Agriculture, Qingdao, China
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Wang TT, Guo ZW, Liu ZP, Feng QY, Wang XL, Tian Q, Ren FZ, Mao XY. The aggregation behavior and interactions of yak milk protein under thermal treatment. J Dairy Sci 2016; 99:6137-6143. [PMID: 27209140 DOI: 10.3168/jds.2016-11063] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Accepted: 03/28/2016] [Indexed: 11/19/2022]
Abstract
The aggregation behavior and interactions of yak milk protein were investigated after heat treatments. Skim yak milk was heated at temperatures in the range of 65 to 95°C for 10 min. The results showed that the whey proteins in yak milk were denatured after heat treatment, especially at temperatures higher than 85°C. Sodium dodecyl sulfate-PAGE analysis indicated that heat treatment induced milk protein denaturation accompanied with aggregation to a certain extent. When the heating temperature was 75 and 85°C, the aggregation behavior of yak milk proteins was almost completely due to the formation of disulfide bonds, whereas denatured α-lactalbumin and β-lactoglobulin interacted with κ-casein. When yak milk was heated at 85 and 95°C, other noncovalent interactions were found between proteins including hydrophobic interactions. The particle size distributions and microstructures demonstrated that the heat stability of yak milk proteins was significantly lowered by heat treatment. When yak milk was heated at 65 and 75°C, no obvious changes were found in the particle size distribution and microstructures in yak milk. When the temperature was 85 and 95°C, the particle size distribution shifted to larger size trend and aggregates were visible in the heated yak milk.
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Affiliation(s)
- T T Wang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing 100083, China; Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Z W Guo
- Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Z P Liu
- Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Q Y Feng
- Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - X L Wang
- Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - Q Tian
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing 100083, China; Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - F Z Ren
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing 100083, China; Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China
| | - X Y Mao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, China Agricultural University, Beijing 100083, China; Key Laboratory of Functional Dairy, Ministry of Education, College of Food Science and Nutritional Engineering, China Agricultural University, Beijing 100083, China.
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Wei Q, Chen ZH, Wang L, Zhang T, Duan L, Behrens C, Wistuba II, Minna JD, Gao B, Luo JH, Liu ZP. LZTFL1 suppresses lung tumorigenesis by maintaining differentiation of lung epithelial cells. Oncogene 2015; 35:2655-63. [PMID: 26364604 PMCID: PMC4791215 DOI: 10.1038/onc.2015.328] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [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: 03/21/2015] [Revised: 07/24/2015] [Accepted: 07/28/2015] [Indexed: 12/13/2022]
Abstract
Lung cancer is the leading cause of cancer-related death in the United States, and metastatic behavior is largely responsible for this mortality. Mutations in multiple ‘driver' oncogenes and tumor suppressors are known to contribute to the lung tumorigenesis and in some cases represent therapeutic targets. Leucine Zipper Transcription Factor-like 1 (LZTFL1) is located in the chromosome region 3p21.3 where allelic loss and genetic alterations occur early and frequently in lung cancers. Previously, we found that LZTFL1 is downregulated in epithelial tumors, including lung cancer, and functions as a tumor suppressor in gastric cancers. However, the functional role of LZTFL1 in lung oncogenesis is undefined. We show here that downregulation of LZTFL1 expression in non-small cell lung cancer is associated with recurrence and poor survival, whereas re-expression of LZTFL1 in lung tumor cells inhibited extravasation/colonization of circulating tumor cells to the lung and inhibited tumor growth in vivo. Mechanistically, we found that LZTFL1 is expressed in ciliated human bronchial epithelial cells (HBECs) and its expression correlates with HBEC differentiation. LZTFL1 inhibits transforming growth factor β-activated mitogen-activated protein kinase and hedgehog signaling. Alteration of intracellular levels of LZTFL1 resulted in changes of expression of genes associated with epithelial-to-mesenchymal transition (EMT). We conclude that LZTFL1 inhibits lung tumorigenesis, possibly by maintaining epithelial cell differentiation and/or inhibition of signalings that lead to EMT and suggest that reactivation of LZTFL1 expression in tumor cells may be a novel lung cancer therapeutic approach.
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Affiliation(s)
- Q Wei
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Department of Surgical Oncology and Institute of Clinical Medicine, Sir Run Run Shaw Hospital College of Medicine, Zhejiang University, Hangzhou, China
| | - Z-H Chen
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Department of Urology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - L Wang
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - T Zhang
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - L Duan
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - C Behrens
- Department of Thoracic/Head and Neck Medical Oncology, UT MD Anderson Cancer Center, Houston, TX, USA.,Department of Translational Molecular Pathology, UT MD Anderson Cancer Center, Houston, TX, USA
| | - I I Wistuba
- Department of Thoracic/Head and Neck Medical Oncology, UT MD Anderson Cancer Center, Houston, TX, USA.,Department of Translational Molecular Pathology, UT MD Anderson Cancer Center, Houston, TX, USA
| | - J D Minna
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Hamon Center for Therapeutic Oncology Research, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - B Gao
- Hamon Center for Therapeutic Oncology Research, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Department of Pharmacology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - J-H Luo
- Department of Urology, First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China
| | - Z P Liu
- Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA
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Gong YJ, Hu H, Jiang J, Hong T, Li JP, Chen M, Liu ZP, Huo Y. [Comparison of angiography-guided and fractional flow reserve-guided management strategy of percutaneous coronary intervention for intermediate coronary lesions]. Beijing Da Xue Xue Bao Yi Xue Ban 2014; 46:844-847. [PMID: 25512269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To compare the consistency of angiography-guided and fractional flow reserve (FFR)-guided management strategy for intermediate coronary lesions. METHODS The patients whose coronary intermediate lesions were assessed by measuring FFR from November 2012 to August 2014. The stenosis percentage and value of FFR during the procedure were collected. All the image data were collected and four experienced interventional cardiologists were invited to assess the target lesions and make a management strategy independently. The consistency of angiography-guided and fractional flow reserve-guided management strategy were analyzed. RESULTS In the study, 151 patients were included, of whom, 70.2% were male, the average age was (62.7±9.6) years, 169 vessels were assessed by measuring FFR, 1 being left main, 116 left anterior descending, 27 left circumflex branch, and 25 right coronary artery. There were some correlationship between the stenosis percentage judged by four interventional cardiologists and the stenosis percentage judged during the procedure (r=0.29-0.38, P<0.001), but the difference was significant. When 0.80 was used as FFR threshold value, the consistency rates of angiography-guided management strategy decision made by the four cardiologists with fractional flow reserve-guided management strategy were 72.78%, 71.60%, 75.15%, and 72.78%, respectively. CONCLUSION Angiography-guided management strategy decision is unreliable, FFR is recommended for management strategy decision for intermediate coronary lesions.
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Affiliation(s)
- Y J Gong
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - H Hu
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - J Jiang
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - T Hong
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - J P Li
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - M Chen
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - Z P Liu
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
| | - Y Huo
- Department of Cardiology, Peking University First Hospital, Beijing 100034, China
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Li YQ, Liu ZP, Yang K, Li YS, Zhao B, Fan ZF, Wan P. First Report of Bean common mosaic virus Infecting Azuki Bean (Vigna angularis) in China. Plant Dis 2014; 98:1017. [PMID: 30708882 DOI: 10.1094/pdis-01-14-0064-pdn] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Azuki bean (Vigna angularis Ohwi & Ohashi) is one of the traditional grain legumes in China. From 2010 to 2013, mosaic and crumpling symptoms on leaves and stunting, all typical symptoms of a viral disease, were observed on cultivars CWA030, CWA221, and JCA002 of azuki bean with incidence rates of 30 to 100% and yield losses of 50 to 95% in the three fields of Changping district, Beijing. To identify the possible viral pathogen(s), 21 symptomatic leaf samples from different cultivars were collected and total RNA was extracted from the samples and subjected to RT-PCR testing with degenerate primers targeting portions of the coding regions of Cucumovirus capsid protein (CP) (1) and Potyvirus NIb (2); these viruses had been reported in azuki bean. Fragments of 940 bp and 350 bp corresponding to Cucumovirus CP and Potyvirus NIb, respectively, were amplified from all the samples collected. Sequencing of the PCR products from nine samples, followed by BLAST analysis, confirmed the presence of Cucumber mosaic virus (CMV) and Bean common mosaic virus (BCMV). All the samples tested were also positive with direct antigen coating (DAC)-ELISA using specific antiserum to CMV or BCMV (Agdia, Elkhart, IN). The CMV CP gene (GenBank Accession No. KJ467817) shared 99% sequence identity with a China CMV isolate (DQ873558). To further characterize the BCMV strain found, fragments of 3,388 bp spanning BCMV NIa, NIb, CP and 3'UTR regions were amplified with another primer set, BCMV-F (5'-AGCAAGTCAATTTACAAGGGACTTC-3') and BCMV-R (5'-GGAACAACAAACATTGCCGTAGCTAC-3') from three samples, and three independent clones from each sample were sequenced. Sequence analysis revealed that this segment (KJ467816) shared 98% identity with the BCMV azuki bean strain (U60100). To the best of our knowledge, this is the first report of BCMV, together with CMV, naturally infecting azuki bean in China. Further attention should be paid to this emerging viral disease and measures should be taken to control the spread of BCMV. References: (1) S. K. Choi et al. J. Virol. Methods 83:1345, 1999. (2) L. Zheng et al. Plant Pathol. 59:1345, 2010.
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Affiliation(s)
- Y Q Li
- College of Plant Science and Technology, Beijing University of Agriculture, Huilongguan No. 7 Beinong Road, Beijing 102206, P. R. China
| | - Z P Liu
- College of Plant Science and Technology, Beijing University of Agriculture, Huilongguan No. 7 Beinong Road, Beijing 102206, P. R. China
| | - K Yang
- College of Plant Science and Technology, Beijing University of Agriculture, Huilongguan No. 7 Beinong Road, Beijing 102206, P. R. China
| | - Y S Li
- College of Plant Science and Technology, Beijing University of Agriculture, Huilongguan No. 7 Beinong Road, Beijing 102206, P. R. China
| | - B Zhao
- College of Plant Science and Technology, Beijing University of Agriculture, Huilongguan No. 7 Beinong Road, Beijing 102206, P. R. China
| | - Z F Fan
- State Key Laboratory of Agro-biotechnology and Department of Plant Pathology, China Agricultural University, No. 2 Yuanmingyuan West Road, Beijing 100193, P. R. China
| | - P Wan
- College of Plant Science and Technology, Beijing University of Agriculture, Huilongguan No. 7 Beinong Road, Beijing 102206, P. R. China
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Chen L, Shang QX, Chen XY, Xing DM, Yang R, Han CG, Ran C, Wei YM, Zhao XY, Liu ZP. First Report on the Occurrence of Cucumber mosaic virus on Fragaria ananassa in China. Plant Dis 2014; 98:1015. [PMID: 30708922 DOI: 10.1094/pdis-11-13-1173-pdn] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
More than 20 viruses are known to infect strawberry (Fragaria ananassa), and a substantial number of these include new viruses identified since 2000 that can contribute to disease complexes (2). The most serious virus related losses in commercial strawberries are caused by aphid transmitted viruses (3,4,5). A survey was undertaken from 2012 to 2013 to investigate virus prevalence in commercial strawberries in rural areas of Hebei Province around Beijing, China, that were exhibiting virus symptoms. Visual observations revealed that the incidence of virus-like symptoms ranged from 30 to 50% of the plants and these symptoms included yellowing, leaf malformation, sometimes combined with severe stunting and deformed flowers or fruits. Leaf samples were tested for Strawberry vein banding virus (SVBV), Strawberry mottle virus (SMoV), Strawberry mild yellow edge virus (SMYEV), and Strawberry crinkle virus (SCV), which are the four most prevalent aphid-transmitted viruses in single or mixed infections (2). Testing was conducted by RT-PCR using total RNA extracted from fresh symptomatic strawberry leaves (3). SVBV was detected in 58 of 190 samples, but all of the samples tested negative for SMoV, SMYEV, and SCV. Aphids were present on many of the plants, so the samples were tested for Cucumber mosaic virus (CMV) because CMV is prevalent in Beijing gardens and farms, and recently had been shown to infect maize in China (5). This RT-PCR was carried out with the CMV primer pair CM420-F (5'-TGATTCTACCGTGTGGGTGA-3') and CM420-R (5'-CCGTAAGCTGGATGGACAAC-3') to amplify a portion of the capsid protein coding region and the conserved 3'non-translated regions of the genomic RNAs. This test revealed the presence of 43 CMV-positives out of 190 samples, and only 16 of these samples were co-infected with both SVBV and CMV. Samples infected with CMV only had leaf malformations and yellowing, while no CMV was found in symptomless samples. One of the amplified, CMV-specific DNA fragments was sequenced directly from the PCR product and showed 93.8% nucleotide sequence identity and 100% amino acid sequence identity to the CMV subgroup I (GenBank Accession No. D10538) (1). Subsequent ELISA tests for the CMV presence verified the RT-PCR results (Agdia, Elkhart, IN), and transmission electron microscopy observations revealed 28 nm spherical particles characteristic of CMV in strawberry samples tested positive for CMV. However, we were unable to detect either CMV or SVBV in 89 of the 169 samples from symptomatic plants, which suggested possible presence of the other pathogen(s). To the best of our knowledge, this is the first report of natural infections of CMV in strawberry plants. These data suggests that CMV is a potential threat to strawberry production. References: (1) M. Q. K. Andrew et al. Virus taxonomy: IXth Report of the ICTV, 970, Elsevier, 2012. (2) R. R. Martin and I. E. Tzanetakis. Plant Dis. 97:1358, 2013. (3) J. R. Thompson et al. J. Virol. Methods 111:85, 2003. (4) I. E. Tzanetakis et al. Plant Dis. 90:1343, 2006. (5) R. Wang et al. J. Phytopathol. 161: 880, 2013.
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Affiliation(s)
- L Chen
- Beijing Key Laboratory of New Technology in Agricultural Application, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, P. R. China
| | - Q X Shang
- Beijing Key Laboratory of New Technology in Agricultural Application, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, P. R. China
| | - X Y Chen
- Beijing Plant Protection Station, Beijing 100029, P. R. China
| | - D M Xing
- Changping Plant Protection and Quarantine Station, Beijing 102200, P. R. China
| | - R Yang
- Beijing Key Laboratory of New Technology in Agricultural Application, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, P. R. China
| | - C G Han
- Department of Plant Pathology and State Key Laboratory for Agro-Biotechnology, China Agricultural University, Beijing 100193, P. R. China
| | - C Ran
- Beijing Key Laboratory of New Technology in Agricultural Application, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, P. R. China. Supported by Funding Project for Academic Human Resources Development in Higher Learning Institutions of Beijing (KM201210020003)
| | - Y M Wei
- Beijing Key Laboratory of New Technology in Agricultural Application, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, P. R. China. Supported by Funding Project for Academic Human Resources Development in Higher Learning Institutions of Beijing (KM201210020003)
| | - X Y Zhao
- Beijing Key Laboratory of New Technology in Agricultural Application, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, P. R. China. Supported by Funding Project for Academic Human Resources Development in Higher Learning Institutions of Beijing (KM201210020003)
| | - Z P Liu
- Beijing Key Laboratory of New Technology in Agricultural Application, College of Plant Science and Technology, Beijing University of Agriculture, Beijing 102206, P. R. China. Supported by Funding Project for Academic Human Resources Development in Higher Learning Institutions of Beijing (KM201210020003)
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Abstract
The family of potassium channel tetramerizationdomain (KCTD) proteins consists of 26 members with mostly unknown functions. The name of the protein family is due to the sequence similarity between the conserved N-terminal region of KCTD proteins and the tetramerization domain in some voltage-gated potassium channels. Dozens of publications suggest that KCTD proteins have roles in various biological processes and diseases. In this review, we summarize the character of Bric-a-brack,Tram-track, Broad complex(BTB) of KCTD proteins, their roles in the ubiquitination pathway, and the roles of KCTD mutants in diseases. Furthermore, we review potential downstream signaling pathways and discuss future studies that should be performed.
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Affiliation(s)
- Zhepeng Liu
- School of Basic Medical Sciences, Wuhan University, Wuhan 430072, People's Republic of China
| | - Yaqian Xiang
- Jinchu University of Technology, No.33 xiangshan avenue, Jingmen 448000, People's Republic of China
| | - Guihong Sun
- School of Basic Medical Sciences, Wuhan University, Wuhan 430072, People's Republic of China
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Abstract
Pseudo-allergic reactions may result from the activation of inflammatory or anaphylactic mechanisms independent of antigen-specific immune responses. Recent statistics show that pseudo-allergic reactions may represent as high as two thirds of all immediate hypersensitivity reactions, implying a great amount of morbidity and numerous health care costs. In this review, we concentrate on agents mediating pseudo-allergic reactions and evaluate accurately the available information on their modes of action. The agents discussed here are divided into three types: (i) Direct mast cell activators, which may activate mast cells in an IgE-independent manner, such as opioid drugs, basic secretagogues and calcium ionophore A23187; (ii) Complement activators, including liposomes, radiocontrast media and Cremophor EL, which may activate the complement system by different pathways: the classical pathway, the mannose-binding lectin pathway or the alternative pathway; (iii) Nonsteroidal anti-inflammatory drugs, which may inhibit the function of cyclooxygenase-1, resulting in the occurrence of adverse reactions. In addition, nonclinical detection methods of pseudo-allergic reactions are also reviewed in order to supply valuable information for clinical diagnosis.
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Affiliation(s)
- H Wang
- Center for New Drugs Evaluation, Shandong University, Ji'nan, Shandong, China
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Liu ZP, Li CJ, Hu HK, Chen JW, Li F, Zou SJ. Efficacy of short-term chincup therapy for mandibular growth retardation in Class III malocclusion. Angle Orthod 2011; 81:162-68. [PMID: 20936970 DOI: 10.2319/050510-244.1] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
OBJECTIVE To assess the efficacy of chincup therapy for mandibular growth retardation in early orthopedic treatment of Class III malocclusion. MATERIALS AND METHODS An electronic search for articles reporting randomized clinical trials, controlled clinical trials, and cohort studies testing the efficacy of chincup appliance for Class III malocclusion published up to the present was done through four databases: Cochrane Central Register of Controlled Trials (CENTRAL; to March 2010), MEDLINE (1950-March 2010), EMBASE (1980-March 2010), and CBM (1978-March 2010). Study quality assessment and data extraction were done by two reviewers independently. Meta-analysis was done with the assistance of Revman 5.01. RESULTS The search resulted in 50 articles. After selection following the established criteria, four cohort studies qualified for the final review analysis. The results showed that chincup therapy decreased SNB angle and increased ANB angle; the total pooled weighted mean difference values (95% confidence interval) were −1.18 (−1.69, −0.67; P < .00001) and 1.90 (0.60, 3.21; P = .004), respectively. Two studies showed a increase in Gonial angle (P < .05) but no significant change in the mandibular length (Cd-Gn; P = .059 and .39, respectively). One study indicated that chincup therapy exerted no effect on mandibular growth retardation, and mandibular growth continued after the treatment in a downward direction. CONCLUSION There are insufficient data in these studies to make clear recommendations regarding the efficacy of chincup therapy in the retardation of mandibular growth.
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Affiliation(s)
- Z P Liu
- Department of Orthodontics, Sichuan University, Chengdu, China
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Wang HS, Cheng F, Shi YQ, Li ZG, Qin HD, Liu ZP. Hypotensive response in rats and toxicological mechanisms induced by shuanghuanglian, an herbal extract mixture. Drug Discov Ther 2010; 4:13-18. [PMID: 22491147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Shuanghuanglian (SHL), an extract mixture isolated from three medicinal herbs, has been used in China as an injection in traditional Chinese medicine to treat viral or bacterial infection. This study examined the hypotensive response in rats induced by SHL and its possible mechanisms. Mean arterial pressure (MAP) and electrocardiograms (ECGs) were studied after intravenous injection of histamine and SHL. Diphenhydramine, an H1 receptor antagonist, the compound 48/80, a promoter of histamine release, and cromolyn, a histamine release inhibitor, were also used to investigate the potential mechanisms of that response. In addition, the histamine level in plasma was measured after administration of SHL and compound 48/80. Both SHL and histamine led to a MAP reduction immediately but did not affect ECGs when initially administered in a similar manner, though this reduction was partially attenuated by diphenhydramine. Pretreatment blocked the rats' reaction to compound 48/80 but not to SHL. The plasma histamine level in rats was also elevated by SHL. SHL can induce severe hypotension through histamine release upon initial administration. In combination with the direct effects of its histaminelike substances on target tissue, SHL likely has the potential to cause an anaphylactoid reaction.
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Affiliation(s)
- H S Wang
- Center for New Drugs Evaluation, Shandong University, Ji'nan, China
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Liu ZP, Li WX, Yu B, Huang J, Sun J, Huo JS, Liu CX. Effects of trans-resveratrol from Polygonum cuspidatum on bone loss using the ovariectomized rat model. J Med Food 2005; 8:14-9. [PMID: 15857203 DOI: 10.1089/jmf.2005.8.14] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [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: 12/22/2022] Open
Abstract
trans-Resveratrol (resveratrol) has been shown in several studies to significantly modulate biomarkers of bone metabolism. But, there is no direct evidence supporting its inhibitory effect towards bone loss. In the present study, effects of resveratrol on bone mineral density (BMD) and bone calcium content (BCC) were examined in the ovariectomized (OVX) rat model. Female Wistar rats were divided into four groups: SHAM group (sham-operated), OVX group (OVX control), OVX + ALD group (OVX and treated with 1.0 mg/kg of body weight of alendronate sodium), and OVX + RES group (OVX and treated with 0.7 mg/kg of body weight of resveratrol). Tested materials were given by gavage for 12 weeks after ovariectomy. Results showed that rats in the OVX, OVX + ALD, and OVX + RES groups had significantly higher body weights and feed efficiency than those in the SHAM group (P < .01). The OVX group had significantly lower femoral epiphysis BMD than the SHAM group, and epiphysis BMD in the OVX + ALD and OVX + RES groups was significantly greater than that in the OVX group (P < .05). However, the femoral midpoint BMD was not significantly different among the four groups. Additionally, animals in the OVX group had significantly lower BCC compared with the SHAM group, while the BCC of the OVX + ALD and OVX + RES groups was significantly higher than that of the OVX group (P < .05). These results indicated that resveratrol could increase epiphysis BMD and inhibit the decrease of femur BCC in OVX rats, suggesting that it could play a role in protecting against bone loss induced by estrogen deficiency.
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Affiliation(s)
- Z P Liu
- Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China.
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Liu Z, Lu W, Qian L, Zhang X, Zeng P, Pan J. In vitro and in vivo studies on mucoadhesive microspheres of amoxicillin. J Control Release 2005; 102:135-44. [PMID: 15653140 DOI: 10.1016/j.jconrel.2004.06.022] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2004] [Accepted: 06/25/2004] [Indexed: 11/29/2022]
Abstract
Amoxicillin mucoadhesive microspheres (Amo-ad-ms) were prepared using ethylcellulose (Ec) as matrix and carbopol 934P as mucoadhesive polymer for the potential use of treating gastric and duodenal ulcers, which were associated with Helicobacter pylori. The morphological characteristics of the mucoadhesive microspheres were studied under scanning electron microscope. In vitro release test showed that amoxicillin released faster in pH 1.0 hydrochloric acid (HCl) than in pH 7.8 phosphate buffer. Yet, it would be degraded to some extent in a pH 1.0 HCl medium at 37 degrees C, which indicated that amoxicillin was not stable in an acidic surrounding. It was also found that amoxicillin entrapped within the microspheres could keep stable. In vitro and in vivo mucoadhesive tests showed that Amo-ad-ms adhered more strongly to gastric mucous layer than nonadhesive amoxicillin microspheres (Amo-Ec-ms) did and could retain in gastrointestinal tract for an extended period of time. Amo-ad-ms and amoxicillin powder were orally administered to rats. The amoxicillin concentration in gastric tissue was higher in the Amo-ad-ms group. In vivo H. pylori clearance tests were also carried out by administering, respectively, Amo-ad-ms or amoxicillin powder, to H. pylori infectious BALB/c mice under fed conditions at single or multiple dose(s) in oral administration. The results showed that Amo-ad-ms had a better clearance effect than amoxicillin powder did. In conclusion, the prolonged gastrointestinal residence time and enhanced amoxicillin stability resulting from the mucoadhesive microspheres of amoxicillin might make contribution to H. pylori clearance.
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Affiliation(s)
- Zhepeng Liu
- Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 200032, PR China
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Gould HJ, England JD, Soignier RD, Nolan P, Minor LD, Liu ZP, Levinson SR, Paul D. Ibuprofen blocks changes in nav 1.7 and 1.8 sodium channels associated with complete freund's adjuvant–induced inflammation in rat. The Journal of Pain 2004; 5:270-80. [PMID: 15219259 DOI: 10.1016/j.jpain.2004.04.005] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2004] [Revised: 04/19/2004] [Accepted: 04/27/2004] [Indexed: 01/04/2023]
Abstract
UNLABELLED Although nerve growth factor plays a role in augmenting sodium channel expression in small dorsal root ganglion (DRG) cells, the cytochemical mediators responsible for enhanced expression in large DRG neurons are unknown. To narrow the search for mediators involved in the increased production of sodium channels in large DRG neurons, we examined the effect of cyclooxygenase inhibition on sodium channel production during inflammation. Thirty minutes before the subcutaneous injection of complete Freund's adjuvant (CFA), rats received ibuprofen (nonselective, cyclooxygenase inhibitor), NS-398 (selective, cyclooxygenase inhibitor), or vehicle. Withdrawal thresholds from thermal and mechanical stimulation were measured before and immediately after CFA injection and at selected hourly intervals after injection for the next 24 hours. Sodium channel up-regulation was then examined in DRG by using site-specific, anti-sodium channel antibodies, Na(v) 1.7 and 1.8. Both ibuprofen and NS-398 provided analgesia during the second phase of inflammatory hyperalgesia that begins 3 hours after CFA injection. The up-regulation, predominantly of Na(v) 1.7 and minimally of Na(v) 1.8 channels, seen in vehicle-treated rats was suppressed by both drugs at 24 hours after injection. By 72 hours after injection, no difference in labeling between the drug- and vehicle-treated animals was observed. Sodium channel labeling in large DRG neurons returned to baseline between 1 and 2 weeks after CFA injection, whereas small cell labeling persisted. The cytochemical signal for sodium channel up-regulation in the large DRG cells that most closely correlates with inflammatory hyperalgesia is mediated at least in part through products of the cyclooxygenase pathway. PERSPECTIVE Expression of sodium channels in dorsal root ganglia increases dramatically during inflammation. The increase in sodium channels is thought to enhance neuronal excitability and to play a role in hyperalgesia and wound vigilance during healing. We provide evidence that prostaglandins play a role in signaling channel augmentation.
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Affiliation(s)
- Harry J Gould
- Department of Neurology, Louisiana State University Health Sciences Center, 533 Bolivar Street, Room 325, New Orleans, LA 70112, USA.
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Liu ZP, Li H, Zhu LY, Liu S, Xue HC. [Application of dot immunogold filtration assay in antibody detection for cysticercosis]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 19:354-6. [PMID: 12572070] [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: 02/28/2023]
Abstract
OBJECTIVE To detect serum antibody of cysticercosis by dot immunogold filtration assay for establishing a diagnostic kit for cysticercosis patients. METHODS Cyst fluid of cysticercus of Taenia solium after dialysis was used as diagnostic antigen in dot immunogold filtration assay and enzyme-linked immunosorbent assay to detect the serum antibody in patients with cysticercosis. Samples to be detected included 71 sera from patients with cysticercosis, 90 sera from healthy people, 20 sera from patients with other parasitic infections or brain tumor. RESULTS The sensitivity and specificity of dot immunogold filtration assay were 90.1%(64/71) and 95.6%(86/90), respectively. No positive reaction was recorded in cases with other diseases except one serum from a patient with brain tumor. The coincidence rate between dot immunogold filtration assay and enzyme-linked immunosorbent assay was 94.4% (152/161). CONCLUSION Dot immunogold filtration assay showed promising result for the diagnosis of cysticercosis.
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Affiliation(s)
- Z P Liu
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai, 200025
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Wang D, Passier R, Liu ZP, Shin CH, Wang Z, Li S, Sutherland LB, Small E, Krieg PA, Olson EN. Regulation of cardiac growth and development by SRF and its cofactors. Cold Spring Harb Symp Quant Biol 2003; 67:97-105. [PMID: 12858529 DOI: 10.1101/sqb.2002.67.97] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- D Wang
- Department of Molecular Biology, University of Texas, Southwestern Medical Center at Dallas, Dallas, Texas 75390-9148, USA
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Abstract
The diagnosis of lead poisoning combined with cadmium in sheep and horses living on farmland in the vicinity of non-ferrous metal smelters in Baiyin of Gansu province in China was based on laboratory findings as well as clinical signs. The concentrations of lead, cadmium, copper and zinc in soils, water, forages, feed and blood, hair and tissues of affected sheep and horses were determined in the surroundings of the smelters in Baiyin and controls. Haematological values were also measured. The concentrations of these elements in soils, forages, water and feed were significantly higher than those in the control area (P<0.01). The contents of lead and cadmium were 9.3 and 690 times in forages, respectively, 10 and 35.6 times in feed. The concentrations of lead and cadmium in blood, hair and tissues of the affected sheep and horses were significantly higher than reference values and control animals (P<0.01). The occurrence of anaemia in affected animals belonged to a hypochromic and microcytic pattern. Lead and cadmium intake levels, estimated according to the ingestion rates of forages, illustrates that the apported lead and cadmium through the ingestion of vegetation growing in the closest sites to the smelters were approximately 6.0 mg Pb/kg body wt./day and 1.1 mg Cd/kg body wt./day in horses, 21.4 mg Pb/kg body wt./day and 4.0 mg Cd/kg body wt./day in sheep, surpassing the fatal dosages for horses of 1.7 mg Pb/kg body wt./day and for sheep of 4.4 mg Pb/kg body wt./day and 1.0 mg Cd/kg body wt./day. It is, therefore, suggested that the disease of sheep and horses in this region is caused by lead poisoning combined with cadmium, mainly due to environment heavy metal pollution by industrial activity. Meanwhile, as such levels of contamination in animal food and grain pose a significant potential risk to human health, these results have formed the basis for subsequent research on levels of metal contamination in human tissues from affected populations. Thus, it can be seen that knowledge of lead and cadmium concentrations in livestock in this region is important for assessing the effects of pollutants on domestic animals themselves and contaminant intakes by humans.
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Affiliation(s)
- Z P Liu
- College of Animal Husbandry and Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, PR China.
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Abstract
The characteristics of nitrate horizontal transport in a major paddy soil, Wu Shan soil in the Tai Lake region, were studied. The concentration of nitrate during horizontal movement decreased with the increasing in distance from the tracer source, the change following a logarithmic function. The concentration of the nitrate was strongly correlated with the soil moisture content, as an exponential function. The horizontal transport velocity of nitrate was significantly correlated with the distance of the tracer source as power function. Therefore, the velocity of nitrate horizontal transport was controlled by the concentration gradient of nitrate, and soil water potential gradient from beginning to the 20 cm mark in the horizontal column. However, the velocity of nitrate horizontal was stable beyond 20 cm, where it was controlled by soil matric potential.
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Affiliation(s)
- X M Chen
- College of Natural Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China.
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Kretschmer T, England JD, Happel LT, Liu ZP, Thouron CL, Nguyen DH, Beuerman RW, Kline DG. Ankyrin G and voltage gated sodium channels colocalize in human neuroma--key proteins of membrane remodeling after axonal injury. Neurosci Lett 2002; 323:151-5. [PMID: 11950515 DOI: 10.1016/s0304-3940(02)00021-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [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: 11/15/2022]
Abstract
We tested if ankyrin G could be detected in human neuroma, if it colocalized with site-specific peripheral nerve sodium channels that accumulate at axon tips of injured nerve, and if there are differences in the distribution of these proteins in non-painful neuroma and painful neuroma tissue vs. normal nerve. Frozen sections from one painful, six non-painful, and three normal nerves were immunocytochemically examined. A double labeling technique with highly specific antibodies against peripheral nerve type 1 (Na(v)1.7), and peripheral nerve type 3 (Na(v)1.8) sodium channels and anti-ankyrin G antibodies detected sodium channels and ankyrin G on the same section, using confocal laser scanning microscopy. Ankyrin G colocalized with both types of sodium channels. Neuroma specimens exhibited considerably larger immunofluorescence for both sodium channels and ankyrin G compared with normal nerve. The painful neuroma presented an even more pronounced immunolabeling in clusters. Findings support results from animal models that link ankyrin G with clustering of sodium channels at axon tips of unmyelinated, sprouting fibers. A common (repair-) mechanism that exists throughout the human nervous system for clustering sodium channels at a high density is assumed. A dysregulation in this membrane remodeling mechanism might be an initial step in a cascade that leads to a painful rather than a non-painful neuroma.
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Affiliation(s)
- Thomas Kretschmer
- Department of Neurosurgery, University of Ulm, BKH Neurochirurgie, Ludwig-Heilmeyer-Strasse 2, D-89312 Günzburg, Germany.
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45
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Abstract
The important role of alkali additives in heterogeneous catalysis is, to a large extent, related to the high promotion effect they have on many fundamental reactions. The wide application of alkali additives in industry does not, however, reflect a thorough understanding of the mechanism of their promotional abilities. To investigate the physical origin of the alkali promotion effect, we have studied CO dissociation on clean Rh(111) and K-covered Rh(111) surfaces using density functional theory. By varying the position of potassium atoms relative to a dissociating CO, we have mapped out the importance of different K effects on the CO dissociation reactions. The K-induced changes in the reaction pathways and reaction barriers have been determined; in particular, a large reduction of the CO dissociation barrier has been identified. A thorough analysis of this promotion effect allows us to rationalize both the electronic and the geometrical factors that govern alkali promotion effect: (i) The extent of barrier reductions depends strongly on how close K is to the dissociating CO. (ii) Direct K-O bonding that is in a very short range plays a crucial role in reducing the barrier. (iii) K can have a rather long-range effect on the TS structure, which could reduce slightly the barriers.
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Affiliation(s)
- Z P Liu
- School of Chemistry, The Queen's University of Belfast, Belfast BT9 5AG, UK
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Liu ZP, Wang PN, Yang WD, Zheng JB, Li FM. [Spectroscopic study on the high voltage fast pulsed discharge of nitrogen, ammonia or their mixture]. Guang Pu Xue Yu Guang Pu Fen Xi 2001; 21:637-640. [PMID: 12945317] [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: 05/24/2023]
Abstract
The emission spectra from the pulsed discharge plasma of nitrogen, ammonia or their mixture were measured. In the discharge of pure nitrogen gas, as the pressure increased, the discharge volume decreased and more dissociation of nitrogen molecules occurred due to the higher energy density. In the discharge of ammonia, N,N+ and NH+ were observed, but no NH2 and NH3 were detected, indicating that ammonia, which has the lower dissociation and ionization energies as compared to nitrogen, was highly dissociated. The discharge of the mixture of N2 and NH3 was also studied. The dependence of the dissociation of nitrogen on the ratio of nitrogen to ammonia was investigated by emission spectra. The optimal ratio for nitrogen dissociation was obtained. The advantage of using the mixture of nitrogen and ammonia in the synthesis of nitrides was discussed.
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Affiliation(s)
- Z P Liu
- State Key Joint Lab for Materials Modification by Triple Beams, Department of Physics, Fudan University, Shanghai 200433, China
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Liu ZP, Nakagawa O, Nakagawa M, Yanagisawa H, Passier R, Richardson JA, Srivastava D, Olson EN. CHAMP, a novel cardiac-specific helicase regulated by MEF2C. Dev Biol 2001; 234:497-509. [PMID: 11397016 DOI: 10.1006/dbio.2001.0277] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [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: 11/22/2022]
Abstract
MEF2C is a MADS-box transcription factor required for cardiac myogenesis and morphogenesis. In MEF2C mutant mouse embryos, heart development arrests at the looping stage (embryonic day 9.0), the future right ventricular chamber fails to form, and cardiomyocyte differentiation is disrupted. To identify genes regulated by MEF2C in the developing heart, we performed differential array analysis coupled with subtractive cloning using RNA from heart tubes of wild-type and MEF2C-null embryos. Here, we describe a novel MEF2C-dependent gene that encodes a cardiac-restricted protein, called CHAMP (cardiac helicase activated by MEF2 protein), that contains seven conserved motifs characteristic of helicases involved in RNA processing, DNA replication, and transcription. During mouse embryogenesis, CHAMP expression commences in the linear heart tube at embryonic day 8.0, shortly after initiation of MEF2C expression in the cardiogenic region. Thereafter, CHAMP is expressed specifically in embryonic and postnatal cardiomyocytes. At the trabeculation stage of heart development, CHAMP expression is highest in the trabecular region in which cardiomyocytes have exited the cell cycle and is lowest in the proliferative compact zone. These findings suggest that CHAMP acts downstream of MEF2C in a cardiac-specific regulatory pathway for RNA processing and/or transcriptional control.
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Affiliation(s)
- Z P Liu
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 6000 Harry Hines Boulevard, Dallas, Texas 75390-9148, USA
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Zeng JZ, Zhou ZY, Wu YQ, Liu ZP, Wang WX, Huang HL, Cai ZN, Yu JL. [Expression of single-chain Fv antibody for anti-beet necrotic yellow vein virus in Escherichia coli]. Yi Chuan Xue Bao 2001; 27:1006-11. [PMID: 11209682] [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: 02/19/2023]
Abstract
The heavy chains variable region gene (VH) of monoclonal antibody against beet necrotic yellow vein virus (BNYVV) was amplified from total DNA extracted from anti-BNYVV hybridoma cells by PCR. Sequencing showed that the VH belongs to mouse subgroup II(A) and contains 360 bp, which code one hundred and twenty amino acids. The VH and VL genes were inserted into a plasmid which contains a linker sequence for constructing scFv gene. The new vector named pTC scFv. The scFv was produced in Escherichia coli and appeared binding activity with BNYVV antigen by ELISA method.
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Affiliation(s)
- J Z Zeng
- Institute of Genetics, Chinese Academy of Sciences, Beijing 100101, China
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Gould HJ, Gould TN, England JD, Paul D, Liu ZP, Levinson SR. A possible role for nerve growth factor in the augmentation of sodium channels in models of chronic pain. Brain Res 2000; 854:19-29. [PMID: 10784102 DOI: 10.1016/s0006-8993(99)02216-7] [Citation(s) in RCA: 132] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Inflammation induces an upregulation of sodium channels in sensory neurons. This most likely occurs as a result of the retrograde transport of cytochemical mediators released during the inflammatory response. The purpose of this study was to determine the effect of the subcutaneous administration of one such mediator, nerve growth factor (NGF), on the production of sodium channels in neurons of the rat dorsal root ganglion. For this, hindpaw withdrawal from either a thermal or mechanical stimulus was measured in rats at selected intervals for up to 2 weeks following injections of NGF. Sodium channel augmentation was then examined in dorsal root ganglia using site-specific, anti-sodium channel antibodies. Both thermal and mechanical allodynia was observed between 3 and 12 h post-injection. The hyperalgesic response returned to baseline by approximately 24 h post-injection. Sodium channel labeling was found to increase dramatically in the small neurons of the associated dorsal root ganglia beginning at 23 h, reached maximum intensity by 1 week, and persisted for up to 3 months post-injection. Pre-blocking NGF with anti-NGF prevented the NGF-induced decrease in paw withdrawal latencies and significantly reduced the intensity of sodium channel labeling. The results indicate that NGF is an important mediator both in the development of acute hyperalgesia and in the stimulation of sodium channel production in dorsal root ganglia during inflammation.
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Affiliation(s)
- H J Gould
- Department of Neurology, Louisiana State University Medical Center, New Orleans 70112, USA.
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Zhang L, Liu ZP, Yang C. [Qualitative recognition on omitted ingredients in Liuwei Dihuang Pills by Bayesian analysis and PRIMA]. Zhongguo Zhong Yao Za Zhi 2000; 25:29-32. [PMID: 12205969] [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: 02/26/2023]
Abstract
OBJECTIVE To qualitatively recognize the omitted ingredients in Liuwei Dihuang Pills by Bayesian analysis and PRIMA. METHODS The extracts of the pills were analyzed by HPLC, for each object, the areas of nine peaks relative to that of the internal standard were selected as classification features. The classification model was established on 169 training-set objects. RESULT The classification average accuracy was 100% for four patterns by Bayesian analysis, and 99.6% by PRIMA analysis. CONCLUSION Bayesian analysis and PRIMA analysis can be used to classify and recognize the omitted ingredients in Liuwei Dihuang Pills.
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Affiliation(s)
- L Zhang
- China Pharmaceutical University, Jiangsu Nanjing 210009, China
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