1
|
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.
Collapse
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
| |
Collapse
|
2
|
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.
Collapse
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
| |
Collapse
|
3
|
Ci LQ, Huang ZG, Lv FM, Wang J, Feng LL, Sun F, Cao SJ, Liu ZP, Liu Y, Wei G, Lu WY. Correction: Ci et al. Enhanced Delivery of Imatinib into Vaginal Mucosa via a New Positively Charged Nanocrystal-Loaded in Situ Hydrogel Formulation for Treatment of Cervical Cancer. Pharmaceutics 2019, 11, 15. Pharmaceutics 2023; 15:2188. [PMID: 37765335 PMCID: PMC10534942 DOI: 10.3390/pharmaceutics15092188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 08/17/2023] [Indexed: 09/29/2023] Open
Abstract
In the original publication [...].
Collapse
Affiliation(s)
- Li-Qian Ci
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China
- 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
| | - Feng-Mei Lv
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Jun Wang
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Ling-Lin Feng
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Room 904, No 1 Research Building, 2140 Xietu Road, Shanghai 200032, China
| | - Feng Sun
- Chinese Academy of Sciences Shanghai Institute of Materia Medica, Shanghai 201203, China
| | - Shui-Juan Cao
- Experimental Teaching Center, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Zhe-Peng Liu
- 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
| | - 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
| |
Collapse
|
4
|
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
| |
Collapse
|
5
|
Wang M, Ge RL, Zhang F, Yu DG, Liu ZP, Li X, Shen H, Williams GR. Electrospun fibers with blank surface and inner drug gradient for improving sustained release. Biomaterials Advances 2023; 150:213404. [PMID: 37060792 DOI: 10.1016/j.bioadv.2023.213404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 03/19/2023] [Accepted: 03/26/2023] [Indexed: 04/03/2023]
Abstract
New engineering methods and advanced strategies are highly desired for creating novel drug sustained release nanomaterials. In this study, a trilayer concentric spinneret was explored to implement several multifluid electrospinning processes. A trilayer core-shell nanofiber was successfully fabricated, which comprise a drug-free polymeric coating and an inner drug gradient distribution, and then compared with bilayer core-shell and monolithic medicated nanofibers. All the electrospun nanofibers similarly consisted of two components (guest drug acetaminophen and host polymer cellulose acetate) and presented a linear morphology. Due to the secondary interactions within nanofibers, loaded drug with amorphous state was detected, as demonstrated by SEM, DSC, XRD, and FTIR determinations. In vitro and in vivo gavage treatments to rats tests were carried out, the trilayer nanofiber with an elaborate structure design were demonstrated to provide better drug sustained release profile than the bilayer core-shell nanofibers in term of initial burst release, later tail-off release and long sustained release time period. The synergistic mechanism for improving the drug sustained release behaviors is disclosed. By breaking the traditional concepts about the implementation of multifluid electrospinning and the strategy of combining surface properties and inner structural characteristics, the present protocols open a new way for developing material processing methods and generating novel functional nanomaterials.
Collapse
|
6
|
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.
Collapse
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
| |
Collapse
|
7
|
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.
Collapse
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
| |
Collapse
|
8
|
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
| |
Collapse
|
9
|
Wang J, Lv FM, Wang DL, Du JL, Guo HY, Chen HN, Zhao SJ, Liu ZP, Liu Y. Synergistic Antitumor Effects on Drug-Resistant Breast Cancer of Paclitaxel/Lapatinib Composite Nanocrystals. Molecules 2020; 25:E604. [PMID: 32019194 PMCID: PMC7036807 DOI: 10.3390/molecules25030604] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 12/30/2019] [Revised: 01/22/2020] [Accepted: 01/29/2020] [Indexed: 11/30/2022] Open
Abstract
Drug resistance presents serious difficulties for cancer treatment. A combination of paclitaxel (PTX) and lapatinib (LAPA) shows potentials in multiple drug resistant cancers in the clinic, but it is almost impossible to deliver these two drugs to the tumor at the same time with the best proportion by simple co-administration of the respective current formualtions for their different pharmacokinetic profiles. Here composite nanocrystals of PTX and LAPA (cNC) were designed with a ratio of 2:1 (w/w), which was their intracellular ratio at the best synergistic efficacy on a drug-resistant cancer cell line (MCF-7/ADR). Such cNC were prepared using a bottom-up method to achieve a nearly spherical appearance and a narrow size distribution of 95.1 ± 2.1 nm. For nanocrystal stabilization, Polyethylene glycol (PEG) coating was introduced into the cNC via polydopamine (PDA) coating in order to get a PEGylated composite nanocrystal (cNC@PDA-PEG) with nanoscale size (170.5 ± 1.4 nm), considerable drug loading (PTX: 21.33 ± 1.48%, LAPA: 10.95 ± 1.24%) and good stability for at least 4 days in plasma-containing buffers. Differential scanning calorimeter (DSC) and XRD data both indicated the different crystalline states of the cNC as well as the cNC@PDA-PEG in comparison with bulk drugs. In vitro release data showed that PTX and LAPA were gradually and completely released from cNC@PDA-PEG in 3 days, while drug release from bulk drugs or cNC was only 30%. cNC@PDA-PEG also showed negligible hemolysis in vitro. Cellular uptake experiments in the MCF-7/ADR cell line showed that the nanocrystals entered the cells in a complete form through endocytosis and then released the drug in the cell. cNC@PDA-PEG inhibits the growth of this drug-resistant cell more effectively than the unmodified version (cNC). In summary, PEGylated PTX and LAPA composite nanocrystals showed the potential for treament of drug-resistant tumors by simultaneously delivering two drugs to tumor cells with the best proportion.
Collapse
Affiliation(s)
- Jun Wang
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (F.-M.L.); (H.-N.C.); (S.-J.Z.)
| | - Feng-Mei Lv
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (F.-M.L.); (H.-N.C.); (S.-J.Z.)
| | - Dong-Li Wang
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China; (D.-L.W.); (H.-Y.G.); (Y.L.)
| | - Jian-Liang Du
- Department of Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China;
| | - Hai-Yan Guo
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China; (D.-L.W.); (H.-Y.G.); (Y.L.)
| | - Hai-Ni Chen
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (F.-M.L.); (H.-N.C.); (S.-J.Z.)
| | - Shou-Jin Zhao
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (F.-M.L.); (H.-N.C.); (S.-J.Z.)
| | - Zhe-Peng Liu
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; (J.W.); (F.-M.L.); (H.-N.C.); (S.-J.Z.)
| | - Yu Liu
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China; (D.-L.W.); (H.-Y.G.); (Y.L.)
| |
Collapse
|
10
|
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
| |
Collapse
|
11
|
Yang Y, Zhu T, Liu Z, Luo M, Yu DG, Annie Bligh S. The key role of straight fluid jet in predicting the drug dissolution from electrospun nanofibers. Int J Pharm 2019; 569:118634. [DOI: 10.1016/j.ijpharm.2019.118634] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/02/2019] [Accepted: 08/17/2019] [Indexed: 02/08/2023]
|
12
|
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.
Collapse
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
| |
Collapse
|
13
|
Ci LQ, Huang ZG, Lv FM, Wang J, Feng LL, Sun F, Cao SJ, Liu ZP, Liu Y, Wei G, Lu WY. Enhanced Delivery of Imatinib into Vaginal Mucosa via a New Positively Charged Nanocrystal-Loaded in Situ Hydrogel Formulation for Treatment of Cervical Cancer. Pharmaceutics 2019; 11:E15. [PMID: 30621141 PMCID: PMC6359353 DOI: 10.3390/pharmaceutics11010015] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [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: 11/14/2018] [Revised: 12/07/2018] [Accepted: 12/09/2018] [Indexed: 12/04/2022] Open
Abstract
The present study was carried out to investigate the potential of cationic functionalization on imatinib nanocrystals to improve the mucoadhesiveness and, thus, delivery to the lesion of cervicovaginal tumors. Amino-group-functionalized imatinib nanocrystals (NC@PDA-NH₂) were prepared with near-spheroid shape, nanoscale size distribution, positive zeta potential, and relatively high drug content with the aid of the polydopamine-coating technique. Efficient interaction between NC@PDA-NH₂ and mucin was proven by mucin adsorption which was related to the positive zeta-potential value of NC@PDA-NH₂ and the change in the size distribution on mixing of NC@PDA-NH₂ and mucin. Cellular uptake, growth inhibition, and apoptosis induction in cervicovaginal cancer-related cells demonstrated the superiority of NC@PDA-NH₂ over unmodified nanocrystals. For practical intravaginal administration, NC@PDA-NH₂ was dispersed in Pluronic F127-based thermosensitive in situ hydrogel, which showed suitable gelation temperature and sustained-release profiles. In comparison with unmodified nanocrystals, NC@PDA-NH₂ exhibited extended residence on ex vivo murine vaginal mucosa, prolonged in vivo intravaginal residence, and enhanced inhibition on the growth of murine orthotopic cervicovaginal model tumors indicated by smaller tumor size, longer median survival time, and more intratumor apoptosis with negligible mucosal toxicity. In conclusion, cationic functionalization endowed NC@PDA-NH₂ significant mucoadhesiveness and, thus, good potential against cervicovaginal cancer via intravaginal administration.
Collapse
Affiliation(s)
- Li-Qian Ci
- Department of Pharmaceutics, School of Pharmacy, Fudan University & Key Laboratory of Smart Drug Delivery (Fudan University), Ministry of Education, Shanghai 201203, China.
- 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.
| | - Feng-Mei Lv
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Jun Wang
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Ling-Lin Feng
- NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), Fudan University, Room 904, No 1 Research Building, 2140 Xietu Road, Shanghai 200032, China.
| | - Feng Sun
- Chinese Academy of Sciences Shanghai Institute of Materia Medica, Shanghai 201203, China.
| | - Shui-Juan Cao
- Experimental Teaching Center, School of Pharmacy, Fudan University, Shanghai 201203, China.
| | - Zhe-Peng Liu
- 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.
| | - 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.
| |
Collapse
|
14
|
Yang YY, Liu ZP, Yu DG, Wang K, Liu P, Chen X. Colon-specific pulsatile drug release provided by electrospun shellac nanocoating on hydrophilic amorphous composites. Int J Nanomedicine 2018; 13:2395-2404. [PMID: 29713169 PMCID: PMC5912617 DOI: 10.2147/ijn.s154849] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Background Colon-specific pulsatile drug release, as a combined drug controlled-release model, is a useful drug delivery manner for a series of diseases. New nanomedicines and related preparation methods are highly desired. Methods With diclofenac sodium (DS) as a model drug, a new type of structural nanocomposite (SC), in which composite polyvinylpyrrolidone (PVP)-DS core was coated by shellac, was fabricated via modified coaxial electrospinning. For comparison, traditional PVP-DS monolithic hydrophilic nanocomposites (HCs) were generated using a traditional blending process. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), attenuated total reflectance-Fourier transform infrared (ATR-FTIR), water contact angle (WCA), and in vitro dissolution and ex vivo permeation tests were conducted to characterize the composites. Results SEM images demonstrated that both composites were linear nanofibers with smooth surface morphology and cross sections. TEM disclosed that the SCs had a thin shellac sheath layer of approximately 12 nm. XRD and ATR-FTIR results demonstrated that the crystalline DS was converted into amorphous composites with PVP because of favorable secondary interactions. WCA and in vitro dissolution tests demonstrated that the sheath shellac layers in SC could resist acid conditions and provide typical colon-specific pulsatile release, rather than a pulsatile release of HC under acid conditions. Ex vivo permeation results demonstrated that the SCs were able to furnish a tenfold drug permeation rate than the DS particles on the colon membrane. Conclusion A new SC with a shellac coating on hydrophilic amorphous nanocomposites could furnish a colon-specific pulsatile drug release profile. The modified coaxial process can be exploited as a useful tool to create nanocoatings.
Collapse
Affiliation(s)
- Yao-Yao Yang
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Zhe-Peng Liu
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Deng-Guang Yu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Ke Wang
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Ping Liu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
| | - Xiaohong Chen
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, China
| |
Collapse
|
15
|
Liu ZP, Zhang LL, Yang YY, Wu D, Jiang G, Yu DG. Preparing composite nanoparticles for immediate drug release by modifying electrohydrodynamic interfaces during electrospraying. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2017.12.066] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
16
|
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.
Collapse
Affiliation(s)
- L Yong
- China National Center for Food Safety Risk Assessment, Beijing 100022, China
| | | | | | | | | | | | | | | |
Collapse
|
17
|
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.
Collapse
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
| |
Collapse
|
18
|
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.
Collapse
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
| |
Collapse
|
19
|
Li C, Huang Z, Liu Z, Ci L, Liu Z, Liu Y, Yan X, Lu W. Sulfonate-modified phenylboronic acid-rich nanoparticles as a novel mucoadhesive drug delivery system for vaginal administration of protein therapeutics: improved stability, mucin-dependent release and effective intravaginal placement. Int J Nanomedicine 2016; 11:5917-5930. [PMID: 27877038 PMCID: PMC5108605 DOI: 10.2147/ijn.s113658] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Effective interaction between mucoadhesive drug delivery systems and mucin is the basis of effective local placement of drugs to play its therapeutic role after mucosal administration including vaginal use, which especially requires prolonged drug presence for the treatment of gynecological infectious diseases. Our previous report on phenylboronic acid-rich nanoparticles (PBNPs) demonstrated their strong interaction with mucin and mucin-sensitive release profiles of the model protein therapeutics interferon (IFN) in vitro, but their poor stability and obvious tendency to aggregate over time severely limited future application. In this study, sulfonate-modified PBNPs (PBNP-S) were designed as a stable mucoadhesive drug delivery system where the negative charges conferred by sulfonate groups prevented aggregation of nanoparticles and the phenylboronic acid groups ensured effective interaction with mucin over a wide pH range. Results suggested that PBNP-S were of spherical morphology with narrow size distribution (123.5 nm, polydispersity index 0.050), good stability over a wide pH range and 3-month storage and considerable in vitro mucoadhesion capability at vaginal pH as shown by mucin adsorption determination. IFN could be loaded to PBNP-S by physical adsorption with high encapsulation efficiency and released in a mucin-dependent manner in vitro. In vivo near-infrared fluorescent whole animal imaging and quantitative vaginal lavage followed by enzyme-linked immunosorbent assay (ELISA) assay of IFN demonstrated that PBNP-S could stay in the vagina and maintain intravaginal IFN level for much longer time than IFN solution (24 hours vs several hours) without obvious histological irritation to vaginal mucosa after vaginal administration to mice. In summary, good stability, easy loading and controllable release of protein therapeutics, in vitro and in vivo mucoadhesive properties and local safety of PBNP-S suggested it as a promising nanoscale mucoadhesive drug delivery system for vaginal administration of protein therapeutics.
Collapse
Affiliation(s)
- ChunYan Li
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin
| | - ZhiGang Huang
- Department of Pharmaceutics, School of Pharmacy, Key Laboratory of Smart Drug Delivery, Ministry of Education, Fudan University
| | - ZheShuo Liu
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin
| | - LiQian Ci
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, People's Republic of China
| | - ZhePeng Liu
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai, People's Republic of China
| | - Yu Liu
- Department of Pharmaceutics, School of Pharmacy, Key Laboratory of Smart Drug Delivery, Ministry of Education, Fudan University
| | - XueYing Yan
- School of Pharmacy, Heilongjiang University of Chinese Medicine, Harbin
| | - WeiYue Lu
- Department of Pharmaceutics, School of Pharmacy, Key Laboratory of Smart Drug Delivery, Ministry of Education, Fudan University
| |
Collapse
|
20
|
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
| |
Collapse
|
21
|
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.
Collapse
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.
| |
Collapse
|
22
|
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.
Collapse
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
| |
Collapse
|
23
|
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.
Collapse
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
| |
Collapse
|
24
|
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.
Collapse
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
| |
Collapse
|
25
|
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.
Collapse
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)
| |
Collapse
|
26
|
Cui L, Liu ZP, Yu DG, Zhang SP, Bligh SWA, Zhao N. Electrosprayed core-shell nanoparticles of PVP and shellac for furnishing biphasic controlled release of ferulic acid. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3226-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
27
|
Liu ZP, Cui L, Yu DG, Zhao ZX, Chen L. Electrosprayed core-shell solid dispersions of acyclovir fabricated using an epoxy-coated concentric spray head. Int J Nanomedicine 2014; 9:1967-77. [PMID: 24790437 PMCID: PMC3998863 DOI: 10.2147/ijn.s59516] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
A novel structural solid dispersion (SD) taking the form of core–shell microparticles for poorly water-soluble drugs is reported for the first time. Using polyvinylpyrrolidone (PVP) as a hydrophilic polymer matrix, the SDs were fabricated using coaxial electrospraying (characterized by an epoxy-coated concentric spray head), although the core fluids were unprocessable using one-fluid electrospraying. Through manipulating the flow rates of the core drug-loaded solutions, two types of core–shell microparticles with tunable drug contents were prepared. They had average diameters of 1.36±0.67 and 1.74±0.58 μm, and were essentially a combination of nanocomposites with the active ingredient acyclovir (ACY) distributed in the inner core, and the sweeter sucralose and transmembrane enhancer sodium dodecyl sulfate localized in the outer shell. Differential scanning calorimetry and X-ray diffraction results demonstrated that ACY, sodium dodecyl sulfate, and sucralose were well distributed in the PVP matrix in an amorphous state because of favorable second-order interactions. In vitro dissolution and permeation studies showed that the core–shell microparticle SDs rapidly freed ACY within 1 minute and promoted nearly eightfold increases in permeation rate across the sublingual mucosa compared with raw ACY powders.
Collapse
Affiliation(s)
- Zhe-Peng Liu
- School of Medical Instrument and Food Engineering, Shanghai, People's Republic of China
| | - Lei Cui
- Tin Ka Ping College of Science, Shanghai, People's Republic of China
| | - Deng-Guang Yu
- School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai, People's Republic of China
| | - Zhuan-Xia Zhao
- School of Medical Instrument and Food Engineering, Shanghai, People's Republic of China
| | - Lan Chen
- School of Medical Instrument and Food Engineering, Shanghai, People's Republic of China
| |
Collapse
|
28
|
Yu DG, Liu F, Cui L, Liu ZP, Wang X, Bligh SWA. Coaxial electrospinning using a concentric Teflon spinneret to prepare biphasic-release nanofibers of helicid. RSC Adv 2013. [DOI: 10.1039/c3ra43222j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
29
|
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.
Collapse
Affiliation(s)
- H Wang
- Center for New Drugs Evaluation, Shandong University, Ji'nan, Shandong, China
| | | | | |
Collapse
|
30
|
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.
Collapse
Affiliation(s)
- Z P Liu
- Department of Orthodontics, Sichuan University, Chengdu, China
| | | | | | | | | | | |
Collapse
|
31
|
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.
Collapse
Affiliation(s)
- H S Wang
- Center for New Drugs Evaluation, Shandong University, Ji'nan, China
| | | | | | | | | | | |
Collapse
|
32
|
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.
Collapse
Affiliation(s)
- Z P Liu
- Institute of Nutrition and Food Safety, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China.
| | | | | | | | | | | | | |
Collapse
|
33
|
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.
Collapse
Affiliation(s)
- Harry J Gould
- Department of Neurology, Louisiana State University Health Sciences Center, 533 Bolivar Street, Room 325, New Orleans, LA 70112, USA.
| | | | | | | | | | | | | | | |
Collapse
|
34
|
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.
Collapse
Affiliation(s)
- Z P Liu
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai, 200025
| | | | | | | | | |
Collapse
|
35
|
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
| | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
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.
Collapse
Affiliation(s)
- Z P Liu
- College of Animal Husbandry and Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, PR China.
| |
Collapse
|
37
|
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.
Collapse
Affiliation(s)
- X M Chen
- College of Natural Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China.
| | | | | | | |
Collapse
|
38
|
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.
Collapse
Affiliation(s)
- Thomas Kretschmer
- Department of Neurosurgery, University of Ulm, BKH Neurochirurgie, Ludwig-Heilmeyer-Strasse 2, D-89312 Günzburg, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
39
|
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.
Collapse
Affiliation(s)
- Z P Liu
- School of Chemistry, The Queen's University of Belfast, Belfast BT9 5AG, UK
| | | |
Collapse
|
40
|
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.
Collapse
Affiliation(s)
- Z P Liu
- State Key Joint Lab for Materials Modification by Triple Beams, Department of Physics, Fudan University, Shanghai 200433, China
| | | | | | | | | |
Collapse
|
41
|
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.
Collapse
Affiliation(s)
- Z P Liu
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 6000 Harry Hines Boulevard, Dallas, Texas 75390-9148, USA
| | | | | | | | | | | | | | | |
Collapse
|
42
|
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.
Collapse
Affiliation(s)
- J Z Zeng
- Institute of Genetics, Chinese Academy of Sciences, Beijing 100101, China
| | | | | | | | | | | | | | | |
Collapse
|
43
|
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.
Collapse
Affiliation(s)
- H J Gould
- Department of Neurology, Louisiana State University Medical Center, New Orleans 70112, USA.
| | | | | | | | | | | |
Collapse
|
44
|
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.
Collapse
Affiliation(s)
- L Zhang
- China Pharmaceutical University, Jiangsu Nanjing 210009, China
| | | | | |
Collapse
|
45
|
Gould HJ, Gould TN, Paul D, England JD, Liu ZP, Reeb SC, Levinson SR. Development of inflammatory hypersensitivity and augmentation of sodium channels in rat dorsal root ganglia. Brain Res 1999; 824:296-9. [PMID: 10196462 DOI: 10.1016/s0006-8993(99)01218-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [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: 10/18/2022]
Abstract
The development of thermal allodynia in relationship to sodium channel augmentation in dorsal root ganglia (DRGs) was studied in albino rats. Paw withdrawal latencies were measured hourly following complete Freund's adjuvant (CFA) injections. Sodium channels were demonstrated with immunocytochemistry. Sustained minimum latencies were attained between 10 and 12 h post-injection. Sodium channel labeling began to increase at 23 h post-injection and reached maximum levels by 24 h. Thermal hypersensitivity is thus established 12 h before sodium channel augmentation can be demonstrated.
Collapse
Affiliation(s)
- H J Gould
- Department of Neurology, Louisiana State University Medical Center, 1542 Tulane Avenue, New Orleans, LA 70112, USA.
| | | | | | | | | | | | | |
Collapse
|
46
|
Zhong M, Liu ZP, Xu LJ, Wang ZY, Wang GT. [Synthesis of adenine derivatives and their activities against herpes virus in vitro]. Yao Xue Xue Bao 1998; 31:837-43. [PMID: 9863254] [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: 02/09/2023]
Abstract
A series of 9-(N4-substituted acetaldehyde thiosemicarbazone) adenines were synthesized and evaluated for antiherpes virus activity. Compounds 4a-l were prepared by condensation of 9-(acetaldehyde) adenine(6) and the corresponding N4-substituted thiosemicarbazides (10). The antiviral effects of all compounds 4a-l were tested in vitro in primary rabbit kidney cell cultures infected with herpes simplex virus type 1 (HSV-1) and varicella-herpes zoster virus (VZV), and in primary human embryo cell cultures infected with herpes simplex virus type 2 (HSV-2). The results showed that the minimum inhibitory concentrations (MIC) of 4e and 4f for HSV-1 and VZV were 20, 40, 20 and 20 micrograms.ml-1, respectively, and other compounds were 200 micrograms.ml-1. For HSV-2, the MIC of all tested compounds were 300 micrograms.ml-1. We also evaluated the antiherpetic effect of 4e (and 4f) by combination with acyclovir (ACV) in the ratio of 1:1 in vitro. The MIC of the combined compounds were 2 micrograms.ml-1 for 4e and 6 micrograms.ml-1 for 4f, while their minimum cytotoxicities (MCC) in the cell were markedly reduced compared with the individual compounds.
Collapse
Affiliation(s)
- M Zhong
- Faculty of Pharmacy, Shandong Medical University, Jinan
| | | | | | | | | |
Collapse
|
47
|
Abstract
Twenty-seven human traumatic neuromas were examined immunocytochemically using highly specific antibodies directed against the voltage-gated delayed-rectifier potassium channel, Kv1.1. Normal sural nerves from six of the above-noted patients served as control specimens. Additionally, nine of the neuromas and two of the sural nerves were immunostained for voltage-gated calcium channels using an antibody that reacts with a wide spectrum of calcium channels. Normal myelinated fibers showed Kv1.1 specific immunoreactivity only at the juxtaparanodal regions. In contrast, within the neuromas approximately 30% of the myelinated fibers exhibited Kv1.1 specific immunoreactivity in dense patches along internodal axonal regions. The clustering of Kv1.1 channels along myelin-ensheathed internodal segments of axon was highly specific for the neuromas, and was never seen in normal nerve. Specific calcium channel immunoreactivity was not detectable in either the neuromas or sural nerves. Taken together with prior studies on sodium channels, these results suggest that selective and specific mechanisms control the distribution of ion channels within neuromas. Further investigation of ion channel changes within neuromas should provide a better understanding of the abnormal axonal hyperexcitability that frequently develops after nerve injury.
Collapse
Affiliation(s)
- J D England
- Department of Neurology, Louisiana State University School of Medicine, New Orleans 70112-2822, USA.
| | | | | | | | | |
Collapse
|
48
|
Abstract
The mechanisms by which inflammation induces a chronic pain state are poorly understood. Following the induction of many painful conditions, an increase in the spontaneous firing rate of neurons is often observed in peripheral sensory ganglia. Since ion channels are essential mediators of spike generation and impulse conduction, it is reasonable to postulate that local changes in ion channel expression might underlie the changes in membrane excitability. Such alterations may serve to enhance the efficiency by which painful stimuli are transduced and then conducted to the central nervous system. In these studies, we employed immunocytochemical methods to investigate the changes in sodium channel expression in dorsal root ganglia of rats following a subcutaneous injection of complete Freund's adjuvant, an inducer of chronic inflammation. We find that sodium channel immunoreactivity within primary sensory neurons is dramatically increased within 24 h of the complete Freund's adjuvant injection. These changes persist in small neurons for at least 2 months and roughly parallel the time course of behaviorally measured changes in pain thresholds. Thus, the regulation of sodium channel synthesis may play a role in the generation and maintenance of the hyperesthetic state seen in chronic inflammation.
Collapse
Affiliation(s)
- H J Gould
- Department of Neurology, Louisiana State University Medical Center, New Orleans 70112, USA.
| | | | | | | |
Collapse
|
49
|
Liu ZP, Brown NL. [Study on the induction of pco promoters from Escherichia coli with copper and other metal ions]. Yi Chuan Xue Bao 1998; 25:86-94. [PMID: 9648403] [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: 02/08/2023]
Abstract
Two copper inducible promoters in the pco determinant of Escherichia coli were studied by determining the luciferase activity of report vector pUCD615. The results showed that in the absence of pBIN19pco, providing copper resistance genes in trans, the maximum induction for both PpcoA lux fusions was observed at 5 mmol/L CuSO4 and PpcoA box was a stronger promoter than PpcoA long. There were two peaks in the bioluminescences of both PpcoE-lux fusions induced with increasing copper concentration, the first peak was observed at about 0.5 mmol/L CuSO4, the second peak, also the maximum induction, was observed at about 5 mmol/L CuSO4, and PpcoE long was a stronger promoter than PpcoE box. The results indicated that the PpcoE promoter was a much stronger promoter than PpcoA promoter. The results also showed that the copper box was very important and essential to pco promoters, since both of the Ppco short-lux fusions failed to show any luciferase activity when they were induced with copper. In the presence of pBIN19pco, the maximum inductions of all of the Ppco-lux fragments were observed at 6 mmol/L CuSO4 and they were much higher than those observed in the absence of pBIN19pco, and the results also indicated that the cells were able to resistant to much higher copper concentration in the presence of pBIN19pco than in the absence of that. Zn2+ and Ni2+ could be inducers for all of the fragments and Zn2+ was a better inducer than Ni2+, and Cd2+ and Ag+ did not induce the pco system.
Collapse
Affiliation(s)
- Z P Liu
- Institute of Microbiology, Chinese Academy of Sciences, Beijing
| | | |
Collapse
|
50
|
Huang F, Fei J, Ma SK, Zhu LH, Liu ZP, Cai GQ, Ye ZC, Guo LH. Analysis of the 5' flanking sequence of the human norepinephrine transporter gene. Cell Res 1998; 8:143-9. [PMID: 9669029 DOI: 10.1038/cr.1998.14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The human norepinephrine transporter (NET) gene was cloned and structurally analyzed. The far 5' fragment containing exon 1 (a non-coding exon) and exon 2 was sequenced. The transcription start site of the gene in human brain stem tissue was determined by primer extension analysis. It was found that the gene could be transcribed from multiple starting points. The 5' flanking sequence contains a proximal G-C rich region, one possible GSG element and several SP1 sites. However it does not contain TATA box and CAAT box motifs. Gel shift analysis with nuclear extracts from different tissues of mouse shows that the G-C rich region may be involved in tissue specific expression of the gene.
Collapse
Affiliation(s)
- F Huang
- Shanghai Institute of Cell Biology, Chinese Academy of Sciences, China
| | | | | | | | | | | | | | | |
Collapse
|