1
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Xu W, Di Y, Chu S, Wang Z, Long H, Pu L, Ma R, Wang Y. Combination of Chlorambucil and Mercaptopurine Show Effective Anti-Cancer Effects in Mice Model. Int J Nanomedicine 2023; 18:8131-8141. [PMID: 38169995 PMCID: PMC10759911 DOI: 10.2147/ijn.s438742] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 12/16/2023] [Indexed: 01/05/2024] Open
Abstract
Background Combination therapy employing multiple drugs has been shown to enhance the efficacy of cancer treatment. Chlorambucil (Chl) and 6-mercaptopurine (6MP) are the first-line medicines for chronic lymphocytic leukemia and ovarian cancer. However, both were limited by their short half-life of disintegration, unsatisfactory water solubility, and adverse reactions. Methods In this work, the drug Chl and 6MP were introduced into the polymerized N-(2-hydroxypropyl) methacrylamide (polyHPMA) by pH and glutathione responsive linker to construct the polymer nanodrug delivery system for effective co-delivery. Results The drug load capacities, release, morphology, and cytotoxicity of the pro-drug were systematic. The two drugs showed satisfactory synergism with a combination index of 0.81, and a better ability to induce apoptosis. In and ex vivo fluorescence imaging showed a rapid systemic distribution of the conjugate within mice, majorly metabolized by liver and kidneys and eliminated after 24 hr. No significant pathological damage was observed in the major organs. This polymeric prodrug system holds promise for improved therapeutic efficiency and reduced side effects through the synergistic delivery of various chemotherapeutics. Conclusion The introduction of HPMA as a carrier not only enhanced the solubility and biocompatibilities of Chl and 6 MP but also improved their drug effect. This strategy might be a promising alternative for constructing multi-drug-release system.
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Affiliation(s)
- Weibing Xu
- College of Science, Gansu Agricultural University, Lanzhou, 730000, People’s Republic of China
| | - Yuxin Di
- College of Science, Gansu Agricultural University, Lanzhou, 730000, People’s Republic of China
| | - Shengjing Chu
- College of Science, Gansu Agricultural University, Lanzhou, 730000, People’s Republic of China
| | - Zixuan Wang
- College of Science, Gansu Agricultural University, Lanzhou, 730000, People’s Republic of China
| | - Haitao Long
- College of Science, Gansu Agricultural University, Lanzhou, 730000, People’s Republic of China
| | - Lumei Pu
- College of Science, Gansu Agricultural University, Lanzhou, 730000, People’s Republic of China
| | - Runtian Ma
- College of Science, Gansu Agricultural University, Lanzhou, 730000, People’s Republic of China
| | - Yanwei Wang
- Department of Chemical and Materials Engineering, School of Engineering and Digital Sciences, Nazarbayev University, Astana, 010000, Kazakhstan
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2
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Zheng X, Zhang X, Zhao J, Oyom W, Long H, Yang R, Pu L, Bi Y, Prusky D. Meyerozyma guilliermondii promoted the deposition of GSH type lignin by activating the biosynthesis and polymerization of monolignols at the wounds of potato tubers. Food Chem 2023; 416:135688. [PMID: 36905709 DOI: 10.1016/j.foodchem.2023.135688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 01/08/2023] [Accepted: 02/10/2023] [Indexed: 02/19/2023]
Abstract
Lignin is a crucial component in the wound tissue of tubers. The biocontrol yeast Meyerozyma guilliermondii increased the activities of phenylalanine ammonia lyase, cinnamate-4-hydroxylase, 4-coenzyme coenzyme A ligase, and cinnamyl alcohol dehydrogenase, and elevated the levels of coniferyl, sinapyl, and p-coumaryl alcohol. The yeast also enhanced the activities of peroxidase and laccase, as well as the content of hydrogen peroxide. The lignin promoted by the yeast was identified as guaiacyl-syringyl-p-hydroxyphenyl type using Fourier transform infrared spectroscopy and two-dimensional heteronuclear single quantum coherence nuclear magnetic resonance. Furthermore, a larger signal area for G2, G5, G'6, S2, 6, and S'2, 6 units was observed in the treated tubers, and the G'2 and G6 units were only detected in the treated tuber. Taken together, M. guilliermondii could promote deposition of guaiacyl-syringyl-p-hydroxyphenyl type lignin by activating the biosynthesis and polymerization of monolignols at the wounds of potato tubers.
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Affiliation(s)
- Xiaoyuan Zheng
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
| | - Xuejiao Zhang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
| | - Jinmei Zhao
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
| | - William Oyom
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
| | - Haitao Long
- College of Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Ruirui Yang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China
| | - Lumei Pu
- College of Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Yang Bi
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China.
| | - Dov Prusky
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China; Department of Postharvest Science of Fresh Produce, Agricultural Research Organization, Rishon LeZion 7505101, Israel
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3
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Pu L, Liu H, Liu D, Zhao F, Dai X, Chen J. Novel marker for diagnosis of supracardiac total anomalous pulmonary venous connection in first trimester. Ultrasound Obstet Gynecol 2023; 61:653-655. [PMID: 36349882 DOI: 10.1002/uog.26112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 10/13/2022] [Accepted: 10/18/2022] [Indexed: 05/04/2023]
Affiliation(s)
- L Pu
- Department of Ultrasonic Medicine, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
| | - H Liu
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
- Department of Pediatric Pulmonology and Immunology, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- NHC Key Laboratory of Chronobiology (Sichuan University), Chengdu, Sichuan, China
| | - D Liu
- Department of Ultrasonic Medicine, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
| | - F Zhao
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
- Department of Radiology, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
| | - X Dai
- Department of Ultrasonic Medicine, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
| | - J Chen
- Department of Ultrasonic Medicine, West China Second Hospital of Sichuan University, Chengdu, Sichuan, China
- Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, Sichuan, China
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4
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Bo L, Shi W, Nian F, Hu Y, Pu L, Li P, Zhang Z, Tong J. Interface engineering of Co3S4@Co3O4/N, S-doped carbon core@shell nanostructures serve as an excellent bifunctional ORR/OER electrocatalyst for rechargeable Zn-air battery. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Long H, Bi Y, Pu L, Xu W, Xue H, Fu G, Prusky D. Preparation of chitosan/ fennel seed essential oil/ starch sodium octenyl succinate composite films for apple fruit preservation. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Zhao M, Tang Z, Zhang J, Fu G, Xu W, Wu Q, Pu L. Preparation and MRI performance of a composite contrast agent based on palygorskite pores and channels binding effect to prolong the residence time of water molecules on gadolinium ions. RSC Adv 2022; 12:7328-7334. [PMID: 35424669 PMCID: PMC8982286 DOI: 10.1039/d1ra08967f] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 02/26/2022] [Indexed: 11/21/2022] Open
Abstract
Herein, gadolinium tannate was simply and conveniently coated on the surface of palygorskite by in situ reaction of a coordination polymer formed between tannic acid and Gd3+. The palygorskite-tannate gadolinium-polyvinyl alcohol integrated composite (PAL@Gd@PVA) is successfully prepared after the introduction of polyvinyl alcohol onto the palygorskite-tannate gadolinium. The structure is characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction spectroscopy, X-ray photoelectron spectroscopy, and transmission electron microscopy analysis. The results show that TA-Gd and PVA are successfully loaded on the surface of palygorskite, and the rod crystal structure of palygorskite in the composite remains intact. Palygorskite fibres constitute the framework of the composite and play a key role in supporting and crosslinking the composite. The prepared compounds showed negligible cytotoxicity and low haemolysis rate, showing good biocompatibility. In vitro MRI results showed that the longitudinal and transverse relaxation rates of the composite are 59.56 and 340.81 mm-1 s-1, respectively.
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Affiliation(s)
- Minzhi Zhao
- College of Science, Gansu Agricultural University Lanzhou 730000 China
| | - Zhonghua Tang
- Lanzhou Petrochemical Research Centre PetroChina Lanzhou 730060 Gansu China
| | - Jia Zhang
- College of Science, Gansu Agricultural University Lanzhou 730000 China
| | - Guorui Fu
- College of Science, Gansu Agricultural University Lanzhou 730000 China
| | - Weibing Xu
- College of Science, Gansu Agricultural University Lanzhou 730000 China
| | - Qingfeng Wu
- Institute of Modern Physics, Chinese Academy of Sciences Lanzhou 730000 China
| | - Lumei Pu
- College of Science, Gansu Agricultural University Lanzhou 730000 China
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7
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ZHAN Y, He X, Pu L, Zou Y, He Q, Hong D, Li G. POS-197 INVESTIGATION ON THE ACHIEVEMENT OF CKD-MBD SERUM INDICATORS OF HEMODIALYSIS PATIENTS IN SICHUAN PROVINCE. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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8
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ZHAN Y, He X, Pu L, Zhang Y, He Q, Hong D, Li G. POS-627 INVESTIGATION ON THE SEASONAL DISTRIBUTION OF HYPERKALEMIA IN HEMODIALYSIS PATIENT. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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9
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Jimdjio CK, Xue H, Bi Y, Nan M, Li L, Zhang R, Liu Q, Pu L. Effect of Ambient pH on Growth, Pathogenicity, and Patulin Production of Penicillium expansum. Toxins (Basel) 2021; 13:550. [PMID: 34437421 PMCID: PMC8402621 DOI: 10.3390/toxins13080550] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 08/04/2021] [Accepted: 08/05/2021] [Indexed: 11/17/2022] Open
Abstract
Penicillium expansum is an important postharvest pathogen of pomaceous fruit and a causal agent of blue mold or soft rot. In this study, we investigated the effect of ambient pH on growth, ultrastructure alteration, and pathogenicity of P. expansum, as well as accumulation of patulin and expression of genes involved in patulin biosynthesis. Under different pH, the fungus was routinely cultured and collected for growth, pathogenicity, patulin production, and gene expression studies using transmission electron microscopy, apple inoculation, HPLC, and RT-qPCR methods. Different ambient pH had significant impact on expression of genes and growth factors involved in patulin biosynthesis. Under same range of pH, gene expression profile, growth factors, and patulin accumulation (in vivo and in vitro) all showed similar changing trends. A well-developed cell was observed in addition to upregulation of genes at pH between pH 5.0 and 7.0, while the opposite was observed when pH was too basic (8.5) or too acid (2.5). Additionally, ambient pH had direct or indirect influence on expression of PecreaA, PelaeA, and PepacC. These findings will help in understanding the effect of ambient pH on growth, pathogenicity, and patulin production and support the development of successful methods for combating P. expansum infection on apple fruits.
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Affiliation(s)
- Carelle Kouasseu Jimdjio
- College of Science, Gansu Agricultural University, Lanzhou 730070, China; (C.K.J.); (M.N.); (L.L.); (Q.L.); (L.P.)
| | - Huali Xue
- College of Science, Gansu Agricultural University, Lanzhou 730070, China; (C.K.J.); (M.N.); (L.L.); (Q.L.); (L.P.)
| | - Yang Bi
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China;
| | - Mina Nan
- College of Science, Gansu Agricultural University, Lanzhou 730070, China; (C.K.J.); (M.N.); (L.L.); (Q.L.); (L.P.)
| | - Lan Li
- College of Science, Gansu Agricultural University, Lanzhou 730070, China; (C.K.J.); (M.N.); (L.L.); (Q.L.); (L.P.)
| | - Rui Zhang
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China;
| | - Qili Liu
- College of Science, Gansu Agricultural University, Lanzhou 730070, China; (C.K.J.); (M.N.); (L.L.); (Q.L.); (L.P.)
| | - Lumei Pu
- College of Science, Gansu Agricultural University, Lanzhou 730070, China; (C.K.J.); (M.N.); (L.L.); (Q.L.); (L.P.)
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10
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Li G, Zhao M, Zhang J, Li H, Xu W, Pu L, Shi X. Poly(HPMA)–chlorambucil conjugate nanoparticles: facile fabrication and in vitro anti-cancer activity. NEW J CHEM 2021. [DOI: 10.1039/d1nj03134a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An acid-sensitive poly(HPMA)–Chl conjugate was developed and its antitumor effect towards HepG2 and MCF-7 cells was evaluated.
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Affiliation(s)
- Guichen Li
- College of Science, Gansu Agricultural University, Lanzhou 730000, China
| | - Minzhi Zhao
- College of Science, Gansu Agricultural University, Lanzhou 730000, China
| | - Jia Zhang
- College of Science, Gansu Agricultural University, Lanzhou 730000, China
| | - Haining Li
- Gansu Provincial Cancer Hospital, Lanzhou, 730050, P. R. China
| | - Weibing Xu
- College of Science, Gansu Agricultural University, Lanzhou 730000, China
| | - Lumei Pu
- College of Science, Gansu Agricultural University, Lanzhou 730000, China
| | - Xinhe Shi
- Laboratory Animal Centre, The Second Hospital of Lanzhou University, Lanzhou 730000, China
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11
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Liu JY, Hua MX, Du CJ, Pu L, Xiang P, Li CS, Xiong HF, Liu XZ, Chen ZH, Xie W, Li A. The dual role of anti-viral therapy in the treatment of Coronavirus disease 2019. Eur Rev Med Pharmacol Sci 2020; 24:11939-11944. [PMID: 33275267 DOI: 10.26355/eurrev_202011_23854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Coronavirus disease 2019 (COVID-19) has become a worldwide public health emergency; unfortunately, there is currently no treatment for improving outcomes or reducing viral-clearance times in infected patients. The aim of the present study was to evaluate the efficacy of interferon (IFN) with or without lopinavir and ritonavir as antiviral therapeutic option for treating COVID-19 infection. PATIENTS AND METHODS The present study enrolled 148 patients that received either standard care, treatment with IFN alfa-2b, or IFN alfa-2b combined with lopinavir plus ritonavir. Viral testing was performed using Reverse-Transcription Polymerase Chain Reaction (RT-PCR). RESULTS There was no significant difference in the viral-clearance time at 28 days after treatment between patients receiving standard care and those receiving anti-viral treatments. However, the average viral-clearance time of patients receiving standard care (14 days) was shorter than that for patients receiving IFN alfa-2b or IFN alfa-2b combined with lopinavir plus ritonavir (15.5 or 17.5 days) (p<0.05). Patients treated with IFN alfa-2b within five days or IFN alfa-2b combined with lopinavir plus ritonavir after three days of symptoms exhibited shorter viral-clearance times than the other groups (p<0.05). Moreover, viral-clearance times were significantly longer in patients receiving standard care or anti-viral treatment 5 days after symptoms appeared than those of patients who received these treatments within five days of symptom onset (p<0.05). CONCLUSIONS Early symptomatic treatment is most critical for maximizing amelioration of COVID-19 infection. Anti-viral treatment might have complicated effect on viral-clearance.
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Affiliation(s)
- J-Y Liu
- Department of Intensive Care Unit, Beijing Ditan Hospital, Capital Medical University, Beijing, P. R. China.
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12
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Li J, Riley A, Pu L, Long H, Li Z. Preparation and Characterization of a Starch‐Based Adsorbent for the Effective Removal of Environmental Pollutants Hg (II). STARCH-STARKE 2020. [DOI: 10.1002/star.201900148] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Jing Li
- College of Science Gansu Agricultural University Lanzhou 730070 P. R. China
| | - Andrew Riley
- Department of Chemistry Ball State University Muncie Indiana 47306 USA
| | - Lumei Pu
- College of Science Gansu Agricultural University Lanzhou 730070 P. R. China
| | - Haitao Long
- College of Science Gansu Agricultural University Lanzhou 730070 P. R. China
| | - Zhihai Li
- Department of Chemistry Ball State University Muncie Indiana 47306 USA
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13
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Wang D, Wang D, Pu L, Wei G. Improved Antioxidant Capacity and Immune Function of Broiler Chickens Fed with Selenium-enriched Candida utilis. Braz J Poult Sci 2020. [DOI: 10.1590/1806-9061-2019-1047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- D Wang
- Soochow University, China
| | - D Wang
- Soochow University, China
| | - L Pu
- Soochow University, China
| | - G Wei
- Soochow University, China
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14
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Li C, Pu L, liu R, Shi B, Shia J. Evaluation of growth trend about nasal dorsum of patients influenced by cleft types. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Nan M, Bi Y, Xue H, Xue S, Long H, Pu L, Fu G. Rapid Determination of Ochratoxin A in Grape and Its Commodities Based on a Label-Free Impedimetric Aptasensor Constructed by Layer-by-Layer Self-Assembly. Toxins (Basel) 2019; 11:toxins11020071. [PMID: 30696025 PMCID: PMC6410112 DOI: 10.3390/toxins11020071] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 01/22/2019] [Accepted: 01/22/2019] [Indexed: 01/21/2023] Open
Abstract
A simple and sensitive label-free impedimetric aptasensor for rapid determination of ochratoxin A (OTA) has been developed, which was based on the combination between thiolated aptamer and gold nanoparticles by layer-by-layer self-assembly. Because of the interaction between aptamer and OTA, the relative normalized electron-transfer resistance (ΔRct) values obtained by electrochemical impedance spectroscopy (EIS) was proportional to the concentration of OTA and showed a good linear relationship from 0.1 to 10.0 ng/mL, with a lower detection limit (0.030 ng/mL) than one-step thiolated DNA aptasensor. The established method was successfully applied to detect and analyze OTA in table wine and grape juice, and the recovery was 90.56%–104.21% when PVP effective removed of phenolic substances. The label-free impedimetric aptasensor was used for rapid detection and quantitation of OTA in the inoculated grapes with the Aspergillus Nigri (H1), and the production of OTA (62.4 μg/kg, 20 μg/kg) far exceeded the maximum levels of 2 μg/kg after inoculation for three days. The developed method exhibited a good specificity, high sensitivity, time-efficient, and it could be applied to detect the OTA concentration in grape and its commodities.
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Affiliation(s)
- Mina Nan
- College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China.
| | - Yang Bi
- College of Food Science and Engineering, Gansu Agricultural University, Lanzhou 730070, China.
| | - Huali Xue
- College of Science, Gansu Agricultural University, Lanzhou 730070, China.
| | - Sulin Xue
- College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China.
| | - Haitao Long
- College of Science, Gansu Agricultural University, Lanzhou 730070, China.
| | - Lumei Pu
- College of Science, Gansu Agricultural University, Lanzhou 730070, China.
| | - Guorui Fu
- College of Science, Gansu Agricultural University, Lanzhou 730070, China.
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16
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Xu W, Lin Z, Li G, Long H, Du M, Fu G, Pu L. Linear PVA–DTPA–Gd conjugate for magnetic resonance imaging. RSC Adv 2019; 9:37052-37056. [PMID: 35539082 PMCID: PMC9075117 DOI: 10.1039/c9ra05607f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 10/29/2019] [Indexed: 12/23/2022] Open
Abstract
In this study, we report the preparation and characterization of the PVA–DTPA–Gd conjugate as a potential MRI contrast agent (CA). The r1 value and the r2/r1 ratio were about 5.6 mM−1 s−1 and 1.31, respectively. In vitro toxicity studies not only demonstrated that the polymeric system possessed good biocompatibility, but also proved that the conjugate could be an attractive candidate for CA. In this study, we report the preparation and characterization of the PVA–DTPA–Gd conjugate as a potential MRI contrast agent (CA).![]()
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Affiliation(s)
- Weibing Xu
- College of Science
- Gansu Agricultural University
- Lanzhou 730000
- P. R. China
| | - Zhiyan Lin
- Clinical Medical College
- Gansu University of Chinese Medicine
- Lanzhou 730000
- China
| | - Guichen Li
- Gansu Provincial Key Laboratory of Aridland Crop Science
- Gansu Agricultural University
- Lanzhou 730070
- China
| | - Haitao Long
- College of Science
- Gansu Agricultural University
- Lanzhou 730000
- P. R. China
| | - Mingyuan Du
- College of Science
- Gansu Agricultural University
- Lanzhou 730000
- P. R. China
| | - Guorui Fu
- College of Science
- Gansu Agricultural University
- Lanzhou 730000
- P. R. China
| | - Lumei Pu
- College of Science
- Gansu Agricultural University
- Lanzhou 730000
- P. R. China
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17
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Abstract
GSH-sensitive poly(HPMA)–PTA was developed and its antitumor effect on HepG2 cells was evaluated.
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Affiliation(s)
- Weibing Xu
- College of Science
- Gansu Agriculture University
- Lanzhou 730000
- P. R. China
| | - Guichen Li
- Gansu Provincial Key Laboratory of Aridland Crop Science
- Gansu Agricultural University
- Lanzhou 730070
- China
| | - Haitao Long
- College of Science
- Gansu Agriculture University
- Lanzhou 730000
- P. R. China
| | - Guorui Fu
- College of Science
- Gansu Agriculture University
- Lanzhou 730000
- P. R. China
| | - Lumei Pu
- College of Science
- Gansu Agriculture University
- Lanzhou 730000
- P. R. China
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18
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Richter U, Kronburg MB, Huo Y, Sitzy J, Pu L, Mayer J, Ulbrich S, Gaspar T, Piorkowski C. P1214From trials to clinical practice: True outcome of AF landmark trials and studies. Europace 2018. [DOI: 10.1093/europace/euy015.696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- U Richter
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - M B Kronburg
- Aarhus University Hospital, Electrophysiology, Aarhus, Denmark
| | - Y Huo
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - J Sitzy
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - L Pu
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - J Mayer
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - S Ulbrich
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - T Gaspar
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - C Piorkowski
- University Hospital Dresden, Electrophysiology, Dresden, Germany
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Huo Y, Kronborg MB, Ulbrich S, Zedda A, Mayer J, Pu L, Guo J, Richter U, Sitzy J, Gaspar T, Piorkowski C. P364Presence of low voltage zone areas is associated with lower AF recurrence in patients undergoing re-ablation with substrate modification. Europace 2018. [DOI: 10.1093/europace/euy015.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Huo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - S Ulbrich
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - A Zedda
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Guo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
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20
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Huo Y, Kronborg MB, Ulbrich S, Zedda A, Mayer J, Pu L, Guo J, Richter U, Sitzy J, Gaspar T, Piorkowski C. P1170Freedom from AF after total left atrial isolation in patients with large areas arrhythmia substrate. Europace 2018. [DOI: 10.1093/europace/euy015.655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Y Huo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - S Ulbrich
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - A Zedda
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Guo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
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21
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Ulbrich S, Huo Y, Richter U, Mayer J, Pu L, Kronborg MB, Zedda AM, Guo J, Sitzy J, Gaspar T, Piorkowski C. P836Mechanical function after total left atrial isolation in patients with atrial fibrillation at the end stage of left atrial myopathy. Europace 2018. [DOI: 10.1093/europace/euy015.440] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- S Ulbrich
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - Y Huo
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - A M Zedda
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - J Guo
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center, Department of Cardiology and Intensive Care, Dresden, Germany
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22
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Huo Y, Kronborg MB, Ulbrich S, Zedda AM, Mayer J, Pu L, Guo J, Richter U, Sitzy J, Gaspar T, Piorkowski C. P840Feasibility and safety of total left atrial isolation and subsequent left atrial appendage occlusion in the patients with atrial fibrillation at the end stage of left atrial myopathy. Europace 2018. [DOI: 10.1093/europace/euy015.443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y Huo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - S Ulbrich
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - A M Zedda
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Guo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
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23
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Richter U, Kronborg MB, Huo Y, Sitzy J, Mayer J, Ulbrich S, Pu L, Gaspar T, Piorkowski C. 48Succses of atrial fibrillation ablation in patients with paroxsysmal or persistent AF when comparing continuous with periodic discontinuous continuous follow-up. Europace 2018. [DOI: 10.1093/europace/euy015.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- U Richter
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - M B Kronborg
- Aarhus University Hospital, Electrophysiology, Aarhus, Denmark
| | - Y Huo
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - J Sitzy
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - J Mayer
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - S Ulbrich
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - L Pu
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - T Gaspar
- University Hospital Dresden, Electrophysiology, Dresden, Germany
| | - C Piorkowski
- University Hospital Dresden, Electrophysiology, Dresden, Germany
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24
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Huo Y, Kronborg MB, Sitzy J, Richter U, Mayer J, Ulbrich S, Pu L, Gaspar T, Piorkowski C. P277Changes in left atrium voltage map characteristics in patients undergoing re-ablation for atrial fibrillation. Europace 2018. [DOI: 10.1093/europace/euy015.089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Y Huo
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - M B Kronborg
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Sitzy
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - U Richter
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - J Mayer
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - S Ulbrich
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - L Pu
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - T Gaspar
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
| | - C Piorkowski
- Dresden University of Technology, Heart Center University Hospital, Dresden, Germany
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25
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Abstract
Poly(HPMA)-DTPA/DOTA-Gd conjugates were fabricated, and the cytotoxicity, hemocompatibility and T1 relaxivity property were evaluated.
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Affiliation(s)
- Weibing Xu
- College of Science
- Gansu Agricultural University
- Lanzhou 730000
- P. R. China
| | - Haitao Long
- College of Science
- Gansu Agricultural University
- Lanzhou 730000
- P. R. China
| | - Xinxin Xu
- College of Life Science
- Northwest Normal University
- Lanzhou 730000
- China
| | - Guorui Fu
- College of Science
- Gansu Agricultural University
- Lanzhou 730000
- P. R. China
| | - Lumei Pu
- College of Science
- Gansu Agricultural University
- Lanzhou 730000
- P. R. China
| | - Lan Ding
- College of Life Science
- Northwest Normal University
- Lanzhou 730000
- China
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26
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Xiong HF, Liu JY, Guo LM, Li CS, Tan JB, Liu YF, Sun Y, Pu L, Xiang P, Zhang M. [Clinical features and treatment of acute fatty liver of pregnancy complicated by acute liver failure]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:938-939. [PMID: 29325296 DOI: 10.3760/cma.j.issn.1007-3418.2017.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- H F Xiong
- Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China
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27
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Ding Y, Sun C, Li J, Hu L, Li M, Liu J, Pu L, Xiong S. The Prognostic Significance of Soluble Programmed Death Ligand 1 Expression in Cancers: A Systematic Review and Meta-analysis. Scand J Immunol 2017; 86:361-367. [PMID: 28930374 DOI: 10.1111/sji.12596] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 08/12/2017] [Indexed: 12/28/2022]
Abstract
The differential expression of soluble programmed death ligand 1 (sPD-L1) has been found in some cancers; however, the correlation between sPD-L1 expression and prognosis value in tumour is still unclear. Here, we conducted a meta-analysis and systematic review to assess the prognostic value of sPD-L1 in patients with cancer. Eligible studies were searched for in the databases including PubMed, Web of Science, ScienceDirect and Wiley Online Library database. The pooled hazard ratios (HRs) with a 95% confidence interval (95%CI) were calculated to assess the prognostic significance of sPD-L1 in human cancer. Eight studies and 1102 patients with cancer were included in the final analysis, and the combined analysis indicated that a higher level of sPD-L1 was associated with worse overall survival (OS) (HR = 1.60, 95%CI: 1.21-1.99). Furthermore, statistical significance was also observed in subgroup analysis stratified by the cancer type (haematological neoplasms or non-haematological neoplasms), sample size (more or less than 100), cut-off value of sPD-L1 (more or less than 6.51 ng/ml) and ethnicity (Asian or European). The meta-analysis indicates that circulating sPD-L1 changes may serve as a useful biomarker for cancer prognosis, and higher level of sPD-L1 may also be associated with poor outcomes in patients with cancer.
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Affiliation(s)
- Y Ding
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - C Sun
- Department of Pharmacology, The Second Hospital of Anhui Medical university, Hefei, Anhui, China
| | - J Li
- Department of Emergency, The Second Hospital of Anhui Medical university, Hefei, Anhui, China
| | - L Hu
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - M Li
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - J Liu
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
| | - L Pu
- Department of Hematology, The Third People's Hospital of Bengbu, Bengbu, Anhui, China
| | - S Xiong
- Department of Hematology/Hematological Lab, The Second Hospital of Anhui Medical University, Hefei, Anhui, China
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28
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Xue H, Bi Y, Tang Y, Hukkeri S, Li X, Pu L, Nan M, Fu G, Wang Y, Li Y. Influence of storage temperature and cultivars on T‐2 toxin and neosolaniol accumulation in apples inoculated with
Trichothecium roseum. J FOOD PROCESS PRES 2017. [DOI: 10.1111/jfpp.13424] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- H. Xue
- College of ScienceGansu Agricultural UniversityLanzhou 730070 People's Republic of China
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - Y. Bi
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - Y. Tang
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - S. Hukkeri
- College of Agriculture and Bio‐ResourcesUniversity of SaskatchewanSaskatoon S7N5A8 Canada
| | - X. Li
- The School of Mathematics & PhysicsLanzhou Jiaotong UniversityLanzhou 730070 Pepole's Republic of China
| | - L. Pu
- College of ScienceGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - M. Nan
- College of ScienceGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - G. Fu
- College of ScienceGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - Yi Wang
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
| | - Y. Li
- College of Food Science and EngineeringGansu Agricultural UniversityLanzhou 730070 People's Republic of China
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29
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Zhang LC, Liang J, Pu L, Zhang YB, Wang LG, Liu X, Yan H, Wang LX. mRNA and protein expression levels of four candidate genes for ear size in Erhualian and Large White pigs. Genet Mol Res 2017; 16:gmr-16-02-gmr.16029252. [PMID: 28407177 DOI: 10.4238/gmr16029252] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Porcine ear size is an important characteristic for distinguishing among pig breeds. In a previous genome-wide association study of porcine ear size, LEM domain-containing 3 (LEMD3), methionine sulfoxide reductase B3 (MSRB3), high mobility group AT-hook 2 (HMGA2), and Wnt inhibitory factor 1 (WIF1) were implicated as important candidate genes for ear size. This study investigated the expression levels of four candidate genes for ear size in Erhualian and Large White pigs. Ten Erhualian pigs with large ears and eight Large White pigs with small ears at 60 days of age were examined. The mRNA expression levels of the four candidate genes were quantified by real-time polymerase chain reaction. WIF1 mRNA expression was significantly higher in Large White than in Erhualian pigs (P < 0.05), whereas the expression levels of the other three genes were not significantly different between the two breeds. The protein expression levels of the four genes were analyzed using western blot. WIF1 protein expression was significantly higher in Large White than in Erhualian pigs (P < 0.01), whereas MSRB3 protein expression was significantly higher in Erhualian than in Large White pigs (P < 0.05). There were no significant differences between the two breeds in residual protein expression. These results suggest that WIF1 is the main causal gene for ear size in pigs.
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Affiliation(s)
- L C Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China .,
| | - J Liang
- College of Animal Science and Veterinary Medicine, , , China
| | - L Pu
- Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, , , China
| | - Y B Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
| | - L G Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
| | - X Liu
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
| | - H Yan
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
| | - L X Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Science, , , China
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30
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Liu Y, Fu QZ, Pu L, Song LL, Lyu GY, Liu J, Wang Z, Wang Z. [Expression and clinical significance of HMGA2 in renal carcinoma]. Zhonghua Zhong Liu Za Zhi 2017; 39:127-132. [PMID: 28219208 DOI: 10.3760/cma.j.issn.0253-3766.2017.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To detect the high mobility group A2 (HMGA2) expression in renal carcinoma, and to explore the relationship with clinicopathological features and its significance for prognosis. Methods: 50 renal carcinoma specimens, 50 corresponding adjacent normal kidney tissue samples, and 40 benign renal tumor specimens were used in this study. The expressions of HMGA2 mRNA and protein were detected by RT-PCR, Western blot and immunohistochemical assays, and its relationship with clinicopathological features and prognosis in the renal carcinoma patients was analyzed. Results: The RT-PCR results showed that the relative expression levels of HMGA2 mRNA in the renal carcinoma, benign renal tumor tissues, and adjacent normal renal tissues were 0.84±0.23, 0.19± 0.06 and 0.08±0.04, respectively, and the expression in renal carcinoma tissue was significantly higher than those of the other 2 groups (P<0.01). The Western blot results showed that the relative expression levels of HMGA2 protein in the renal carcinoma, benign renal tumor tissues, and adjacent normal renal tissues were 0.91±0.24, 0.12±0.04 and 0.03±0.01, respectively, and the expression in renal carcinoma tissue was significantly higher than those of the other 2 groups (P<0.01). Immunohistochemical results showed that the expression of HMGA2 protein exhibited brown and tan granular, which mainly distributed in the cell nuclei. Among the 50 cases of renal carcinoma, 34 cases exhibited positive expression, with a positive rate of 68.0%. Among the 40 cases of benign tumor tissues, 3 cases had positive expression, with a positive rate of 7.5%, while among the 50 cases of adjacent normal renal tissues, there was only 1 case exhibiting positive expression of HMGA2 protein, with a positive rate of 2.0%. The protein expression of HMGA2 was significantly higher in the renal carcinoma than in the benign tumors and normal renal tissues (P=0.004). There was no statistically significant difference in the association of HMGA2 protein expressions with age, sex, tumor size and histological type (P>0.05), while significant difference did exist in the association with different statuses of TNM staging and lymph node metastasis (P<0.05). The median time to progression (TTP) in 34 HMGA2 protein-positive patients was (22.36±1.48) months and that of 16 HMGA2 protein-negative patients was (34.55±1.87) months (P<0.05). Conclusions: HMGA2 plays an important role in the tumorigenesis and development of renal carcinoma, and may be used as an important predictor for estimating the prognosis of renal carcinoma. HMGA2 might become a new diagnostic and prognostic marker for renal carcinoma.
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Affiliation(s)
- Y Liu
- Xi'an Jiaotong University Health Science Center, Xi'an, 710049, China
| | - Q Z Fu
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - L Pu
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - L L Song
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - G Y Lyu
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - J Liu
- Department of Urological Surgery, the Affiliated Zhongshan Hospital of Dalian University, Dalian 116001, China
| | - Zhenlong Wang
- Department of Urological Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China
| | - Ziming Wang
- Department of Urological Surgery, the Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China
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31
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Pu L, Zhang LC, Zhang JS, Song X, Wang LG, Liang J, Zhang YB, Liu X, Yan H, Zhang T, Yue JW, Li N, Wu QQ, Wang LX. Porcine MAP3K5 analysis: molecular cloning, characterization, tissue expression pattern, and copy number variations associated with residual feed intake. Genet Mol Res 2016; 15:gmr7998. [PMID: 27525933 DOI: 10.4238/gmr.15037998] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mitogen-activated protein kinase kinase kinase 5 (MAP3K5) is essential for apoptosis, proliferation, differentiation, and immune responses, and is a candidate marker for residual feed intake (RFI) in pig. We cloned the full-length cDNA sequence of porcine MAP3K5 by rapid-amplification of cDNA ends. The 5451-bp gene contains a 5'-untranslated region (UTR) (718 bp), a coding region (3738 bp), and a 3'-UTR (995 bp), and encodes a peptide of 1245 amino acids, which shares 97, 99, 97, 93, 91, and 84% sequence identity with cattle, sheep, human, mouse, chicken, and zebrafish MAP3K5, respectively. The deduced MAP3K5 protein sequence contains two conserved domains: a DUF4071 domain and a protein kinase domain. Phylogenetic analysis showed that porcine MAP3K5 forms a separate branch to vicugna and camel MAP3K5. Tissue expression analysis using real-time quantitative polymerase chain reaction (qRT-PCR) revealed that MAP3K5 was expressed in the heart, liver, spleen, lung, kidney, muscle, fat, pancrea, ileum, and stomach tissues. Copy number variation was detected for porcine MAP3K5 and validated by qRT-PCR. Furthermore, a significant increase in average copy number was detected in the low RFI group when compared to the high RFI group in a Duroc pig population. These results provide useful information regarding the influence of MAP3K5 on RFI in pigs.
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Affiliation(s)
- L Pu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - L C Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - J S Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - X Song
- Research Institute of Truein Agro-Pastoral Group Co., Ltd., Kaifeng, China
| | - L G Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - J Liang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Y B Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - X Liu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - H Yan
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - T Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - J W Yue
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
| | - N Li
- Jilin Academy of Agricultural Sciences, Changchun, China
| | - Q Q Wu
- College of Animal Science Technology, Hunan Agricultural University, Changsha, China
| | - L X Wang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
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32
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Kankam F, Long HT, He J, Zhang CH, Zhang HX, Pu L, Qiu H. 3-Methylthiopropionic Acid of Rhizoctonia solani AG-3 and Its Role in the Pathogenicity of the Fungus. Plant Pathol J 2016; 32:85-94. [PMID: 27147928 PMCID: PMC4853098 DOI: 10.5423/ppj.oa.08.2015.0159] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 10/21/2015] [Accepted: 11/22/2015] [Indexed: 05/30/2023]
Abstract
Studies were conducted to determine the role of 3-methylthioproprionic acid (MTPA) in the pathogenicity of potato stem canker, Rhizoctonia solani, and the concentrations required to inhibit growth of R. solani under laboratory and plant house-based conditions. The experiments were laid out in a completely randomized design with five treatments and five replications. The treatments were 0, 1, 2, 4, and 8 mM concentrations of MTPA. The purified toxin exhibited maximal activity at pH 2.5 and 30°C. MTPA at 1, 2, 4, and 8 mM levels reduced plant height, chlorophyll content, haulm fresh weight, number of stolons, canopy development, and tuber weight of potato plants, as compared to the control. MTPA significantly affected mycelial growth with 8 mM causing the highest infection. The potato seedlings treated with MTPA concentrations of 1.0-8.0 mM induced necrosis of up to 80% of root system area. Cankers were resulted from the injection of potato seedling stems with 8.0 mM MTPA. The results showed the disappearance of cell membrane, rough mitochondrial and cell walls, change of the shape of chloroplasts, and swollen endoplasmic reticulum. Seventy-six (76) hours after toxin treatment, cell contents were completely broken, cytoplasm dissolved, and more chromatin were seen in the nucleus. The results suggested that high levels of the toxin concentration caused cell membrane and cytoplasm fracture. The integrity of cellular structure was destroyed by the phytotoxin. The concentrations of the phytotoxin were significantly correlated with pathogenicity and caused damage to the cell membrane of potato stem base tissue.
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Affiliation(s)
- Frederick Kankam
- College of Resources and Environmental Sciences/Gansu Provincial Key Lab of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070,
China
- University for Development Studies, Faculty of Agriculture, Tamale,
Ghana
| | - Hai-Tao Long
- College of Sciences, Gansu Agricultural University Lanzhou 730070,
China
| | - Jing He
- College of Sciences, Gansu Agricultural University Lanzhou 730070,
China
| | - Chun-hong Zhang
- College of Resources and Environmental Sciences/Gansu Provincial Key Lab of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070,
China
| | - Hui-Xiu Zhang
- College of Sciences, Gansu Agricultural University Lanzhou 730070,
China
| | - Lumei Pu
- College of Sciences, Gansu Agricultural University Lanzhou 730070,
China
| | - Huizhen Qiu
- College of Resources and Environmental Sciences/Gansu Provincial Key Lab of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070,
China
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Liu X, Wang LG, Zhang LC, Yan H, Zhao KB, Liang J, Li N, Pu L, Zhang T, Wang LX. Molecular cloning, tissue expression pattern, and copy number variation of porcine SCUBE3. Genet Mol Res 2016; 15:gmr7010. [PMID: 26909946 DOI: 10.4238/gmr.15017010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The signal peptide CUB EGF-like domain-containing protein 3 (SCUBE3) gene is a member of SCUBE gene family and plays important roles in bone cell biology and the determination of limb bone length. In this study, the full-length transcript of porcine SCUBE3 was cloned using reverse transcription-polymerase chain reaction and rapid amplification of cDNA ends. The full-length sequence of porcine SCUBE3 cDNA was 4131 base pairs and included 21 exons. The SCUBE3 gene contained a 2895-base pair open reading frame that encoded a peptide of 965 amino acids. Comparison of the deduced amino acid sequences of porcine SCUBE3 with those of human, mouse, zebrafish, and rat showed 96, 95, 73, and 95% identities, respectively. Porcine SCUBE3 mRNA expression levels were highest in the backfat, bone marrow, and cartilage tissues. Copy number variation was detected in porcine SCUBE3 and validated by real-time quantitative polymerase chain reaction. Different copy number variations were present in randomly selected individuals and may, therefore, be a good marker for identifying phenotypic traits. Our findings provide a basis for further investigation of the functions and regulatory mechanisms of SCUBE3 in pigs.
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Affiliation(s)
- X Liu
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - L G Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - L C Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - H Yan
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - K B Zhao
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - J Liang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - N Li
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - L Pu
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - T Zhang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
| | - L X Wang
- Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation of Ministry of Agriculture of China, Institute of Animal Science,Chinese Academy of Agricultural Sciences, Beijing, China
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Liu M, Wang C, Pu L, Liang Z. 18F-FDG pet studies correlate with the MOCA test in parkinson’s disease in a Han Chinese Cohort. J Neurol Sci 2015. [DOI: 10.1016/j.jns.2015.08.774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ji L, Gao W, Wei J, Pu L, Yang J, Guo C. In Vivo Antioxidant Properties of Lotus Root and Cucumber: A Pilot Comparative Study in Aged Subjects. J Nutr Health Aging 2015; 19:765-70. [PMID: 26193861 DOI: 10.1007/s12603-015-0524-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To compare the effects of lotus root and cucumber on antioxidant function in aged subjects. DESIGN Pilot comparative study. SETTING Research setting with vegetable intervention. PARTICIPANTS Healthy aged subjects over the age of sixty. INTERVENTION 30-day supplementation of lotus root or cucumber powder. MEASUREMENTS Plasma value of ferric reducing antioxidant power assay, activity of antioxidant enzymes, contents of some antioxidants, oxidation products, hemolysis, blood mononuclear cell DNA damage and urinary excretion of 8-hydroxy-2'-deoxyguanosine were measured before and after the intervention. RESULTS Plasma glutathione peroxidase activity, contents of vitamin C, total phenolics were significantly increased, while plasma uric acid content significantly decreased in both groups at the end of the intervention. Meanwhile, hemolysis was significantly reduced in both groups and DNA injury rate of blood mononuclear cells in lotus root group and the ratio of comet tail length to total length in cucumber group were also declined significantly post-intervention. However, plasma value of ferric reducing antioxidant power assay, contents of reduced glutathione, vitamin E, malondialdehyde, oxidized low density lipoprotein, carbonyls and activity of superoxide dismutase and catalase were not changed significantly in both group after the intervention. CONCLUSION These results suggest that lotus root and cucumber are not remarkably different in improving antioxidant function in aged subjects, though they are significantly different in antioxidant capacity in vitro. The benefits observed in this study may come from the additive or synergistic combinations of antioxidants contained in vegetables.
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Affiliation(s)
- L Ji
- Changjiang Guo, Department of Nutrition, Tianjin Institute of Health and Environmental Medicine, Tianjin, 300050, P. R. China, Tel.: +86 22 84655429; fax: + 86 22 84655020, E-mail:
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Sun Y, Zheng H, Xi D, Zhang X, Du M, Pu L, Lin M, Yang Y. Molecular characteristics of the MHC-DRA genes from yak (Bos grunniens) and Chinese yakow (Bos grunniens × Bos taurus). Int J Immunogenet 2013; 41:69-73. [PMID: 23815277 DOI: 10.1111/iji.12072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 04/23/2013] [Accepted: 06/02/2013] [Indexed: 11/28/2022]
Abstract
Two full-length cDNAs (762 bp) of the DRA gene from yak and Chinese yakow were isolated and analysed to identify structural and functional variations. The sequences for DRA in yak (Bogr-DRA) and Chinese yakow (Bogr × BoLA-DRA) were essentially identical to those for cattle (99%) and buffalo (97%). Except for two substitutions in the amino acids comprising the domain for signal peptide (SP) in yak, the additional residues were highly conserved across the species investigated. Peptide-binding site (PBS) of Bogr-DRA and Bogr × BoLA-DRA was highly reserved in the α1 domain among all species investigated. The lack of mutation in Bogr-DRA is consistent with the conception that the gene is highly conserved among all mammalian species. The very high conservation of the DRA gene among ruminants, including yak, may be due to its recent evolutionary detachment.
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Affiliation(s)
- Y Sun
- Faculty of Animal Science and Technology, Yunnan Agricultural University, Kunming, China
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Xiong H, Guo LM, Li XW, Jiao YQ, Li BS, Xiang P, Guo J, Zhang M, Li WL, Pu L, Zhang LC. PP-071 Clinical features of critically ill pregnant patients with influenza A (H1N1) infection. Int J Infect Dis 2010. [DOI: 10.1016/s1201-9712(10)60139-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Shenglin M, Yaping X, Jian W, Pu L, Xiaoyun D, Xiaojiang S, Yongling J, Hao J. Dosimetric evaluation of different IMRT treatment plans for non-small cell lung cancer. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e17513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Hyacinth MA, Borges AR, Lum M, Chruszcz M, Caran KL, Pu L, Sabat M. Crystal engineering of propargylic alcohols–new developments and applications. Acta Crystallogr A 2007. [DOI: 10.1107/s0108767307098893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Persoons A, Kauranen M, Elshocht SV, Verbiest T, Ma L, Pu L, Langeveld-voss BMW, Meijer EW. Chiral effects in second-order nonlinear optics. ACTA ACUST UNITED AC 2006. [DOI: 10.1080/10587259808044315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- A. Persoons
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - M. Kauranen
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - S. Van Elshocht
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - T. Verbiest
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - L. Ma
- b Department of Chemistry , University of Virginia , Charlottesville , VA , 22901
| | - L. Pu
- a Laboratory of Chemical and Biological Dynamics , Catholic University of Leuven , Celestijnenlaan 200 D, pc Leuven , Belgium
| | - B. M. W. Langeveld-voss
- c Laboratory of Organic Chemistry , Eindhoven University of Technology , PO Box 513, 5600 , MB , Eindhoven , The Netherlands
| | - E. W. Meijer
- c Laboratory of Organic Chemistry , Eindhoven University of Technology , PO Box 513, 5600 , MB , Eindhoven , The Netherlands
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Gao J, Yu J, Li Y, He X, Bo L, Pu L, Yang W, Lu Q, Yang Z. Decoloration of aqueous Brilliant Green by using glow discharge electrolysis. J Hazard Mater 2006; 137:431-6. [PMID: 16603310 DOI: 10.1016/j.jhazmat.2006.02.022] [Citation(s) in RCA: 18] [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] [Subscribe] [Scholar Register] [Received: 10/01/2005] [Revised: 12/29/2005] [Accepted: 02/16/2006] [Indexed: 05/08/2023]
Abstract
This paper described a plasma degradation of Brilliant Green (BG) by glow discharge electrolysis. Various influencing factors such as the voltage, the distance between cathode and anode were examined. Ultraviolet (UV) absorption spectra, gas chromatogram-mass spectrum (GC-MS), and chemical oxygen demand (COD) were used to monitor the degradation process and to identify the major oxidation intermediates. It was confirmed that benzoic acid, 1,2,3,4,5,6-cyclohexanehexaol, and carboxylic acids (e.g., oxalic acid, succinic acid and hydroxyacetic acid) were produced in the degradation process. The results showed that BG rapidly underwent degradation and eventually mineralized into CO(2) and H(2)O.
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Affiliation(s)
- Jinzhang Gao
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
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Hyacinth MA, Gao G, Bin L, Sabat M, Pu L. Interactions of supramolecular synthons formed by secondary propargylic alcohols. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305084941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Pu L, Shi Y, Zhu JM, Bao XM, Zhang R, Zheng YD. Electrochemical lithography: fabrication of nanoscale Si tips by porous anodization of Al/Si wafer. Chem Commun (Camb) 2004:942-3. [PMID: 15069486 DOI: 10.1039/b315810a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Porous anodization of Al/Si wafer in sulfuric acid results in the formation of Si nanotips on the surface of Si substrate with ultrahigh packing density.
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Affiliation(s)
- L Pu
- Department of Physics, Nanjing University, Nanjing 210093, China.
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Pugh VJ, Hu QS, Zuo X, Lewis FD, Pu L. Optically active BINOL core-based phenyleneethynylene dendrimers for the enantioselective fluorescent recognition of amino alcohols. J Org Chem 2001; 66:6136-40. [PMID: 11529742 DOI: 10.1021/jo010479t] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A dramatic enhancement in fluorescence intensity from 1,1'-bi-2-naphthol (BINOL) to dendritic phenyleneethynylenes containing the BINOL core was observed. The strong fluorescence of the dendrimers allows a very small amount of the chiral materials to be used for sensing. The light harvesting antennas of the dendrimer funnel energy to the center BINOL unit, whose hydroxyl groups upon interaction with a quencher molecule lead to fluorescence quenching. This mechanism makes the dendrimers have much more sensitive fluorescence responses than corresponding small molecule sensors. The fluorescence of these dendrimers can be enantioselectively quenched by chiral amino alcohols. It is observed that the fluorescence lifetime of the generation two dendrimer does not change in the presence of various concentrations of 2-amino-3-phenyl-1-propanol. This demonstrates that the fluorescence quenching is entirely due to static quenching. Thus, formation of nonfluorescent ground-state hydrogen-bond complexes between the dendrimers and amino alcohols is proposed to account for the fluorescent quenching. A linear relationship has been established between the Stern-Völmer constant of the generation two dendrimer and the enantiomeric composition of 2-amino-3-phenyl-1-propanol. Such enantioselective fluorescent sensors may allow a rapid determination of the enantiomeric composition of chiral molecules and are potentially useful in the combinatorial search of asymmetric catalysts and reagents.
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Affiliation(s)
- V J Pugh
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, USA
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Gong LZ, Hu QS, Pu L. Optically active dendrimers with a binaphthyl core and phenylene dendrons: light harvesting and enantioselective fluorescent sensing. J Org Chem 2001; 66:2358-67. [PMID: 11281776 DOI: 10.1021/jo001565g] [Citation(s) in RCA: 97] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Optically active dendrimers containing a 1,1'-binaphthyl core and cross-conjugated phenylene dendrons were synthesized and characterized. The chiral optical properties of these phenylene-based dendrimers are different from the previously reported phenyleneethynylene-based dendrimers probably because of the increased steric interaction between the adjacent phenylene units. UV and fluorescence spectroscopic studies demonstrate that the energy harvested by the periphery of the dendrimers can be efficiently transferred to the more conjugated core, generating much enhanced fluorescence signal at higher generation. The fluorescence of these dendrimers can be quenched both efficiently and enantioselectively by chiral amino alcohols. The energy migration and light-harvesting effects of the dendrimers make the higher generation dendrimer more sensitive to fluorescent quenchers than the lower ones. Thus, the dendritic structure provides a signal amplification mechanism. These materials are potentially useful in the enantioselective recognition of chiral organic molecules.
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Affiliation(s)
- L Z Gong
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, USA
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Abstract
Because of the tremendous effort of a great number of researchers, the catalytic asymmetric dialkylzinc addition to aldehydes has become a mature method. Ligands of diverse structures have been obtained, and high enantioselectivity for all different types of aldehydes have been achieved. Among the representative excellent catalysts are compounds 1, 8, 120, 325, 352, and 360 discussed above. However, compared to the well-developed dialkylzinc addition, the catalytic asymmetric reactions of aryl-, vinyl-, and alkynylzinc reagents with aldehydes are still very much under developed. Although catalysts such as (S)-402 and 210 prepared by Pu and Bolm have shown good enantioselectivity for the reaction of diphenylzinc with certain aromatic and aliphatic aldehydes, the generality of these catalysts for other [formula: see text] arylzinc reagents have not been studied. The vinylzinc additions using ligands 1 and 412 reported by Oppolzer and Wipf were highly enantioselective for certain aromatic aldehydes but not as good for aliphatic aldehydes. Carreira discovered highly enantioselective alkynylzinc additions to aldehydes promoted by the chiral amino alcohol 415, but this process was not catalytic yet. Ishizaki achieved good enantioselectivity for the catalytic alkynylzinc addition to certain aldehydes by using compounds 160, but the enantioselectivity for simple linear aliphatic aldehydes was low. Another much less explored area is the organozinc addition to ketones. Yus and Fu showed very promising results by using ligands 381 and 406 for both dialkylzinc and diphenylzinc additions to ketones, but the scope of these reactions were still very limited. Therefore, more work is needed for the aryl-, vinyl-, and alkynylzinc additions and for the organozinc addition to ketones, although many good catalysts have been obtained for the dialkylzinc addition to aldehydes. Development of these reactions will allow the catalytic asymmetric synthesis of a great variety of functional chiral alcohols that are either the structural units or synthons of many important organic molecules as well as molecules of biological functions. Macromolecular chiral catalysts have become a very attractive research subject in recent years because these materials offer the advantages of simplified product isolation, easy recovery of the generally quite expensive chiral catalysts, and potential use for continuous production. Three types of macromolecules including flexible achiral polymers anchored with chiral catalysts, rigid and sterically regular main chain chiral polymers, and chiral dendrimers have been used for the asymmetric organozinc addition to aldehydes. Among these materials, the binaphthyl-based polymers such as (R)-451 developed by Pu have shown very high and general enantioselectivity. Study of the binaphthyl polymers in the asymmetric organozinc addition has demonstrated that it is possible to systematically modify the structure and function of the rigid and sterically regular polymer for the development of highly enantioselective polymer catalysts. The catalytic properties of highly enantioselective monomer catalysts can also be preserved in the rigid and sterically regular polymer provided the catalytically active species of the monomer catalyst is not its aggregate. The TADDOL-based polymers and dendrimers prepared by Seebach showed very high and stable enantioselectivity for the diethylzinc addition to benzaldehyde even after many cycles. These studies on macromolecular chiral catalysts demonstrate that these materials are potentially very useful for practical applications.
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Affiliation(s)
- L Pu
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, USA
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Abstract
Polymeric/oligomeric and macrocyclic (salophen)Ni(II) complexes have been synthesized starting from both an achiral biphenol dialdehyde and an optically active BINOL dialdehyde. It was found that these polysalophens contain nonplanar coordination of Ni(II) units that are paramagnetic. This is different from the previously reported (salophen)Ni(II) complexes which are square planar and diamagnetic. The nonplanar (salophen)Ni(II) units make the new polymeric Ni(II) complexes different from the helical structure proposed for chiral biaryl-based polymers containing square-planar (salophen)Ni(II) units. The copolymerization of the chiral binaphthyl monomer with the achiral biphenyl monomer demonstrates that the chirality of the binaphthyl unit is not propagated along the biphenyl polymer chain.
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Affiliation(s)
- H C Zhang
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901, USA
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Baiqiu W, Songbin F, Guiyin Z, Pu L. Study of the relationship between psoriasis and the polymorphic site C677T of methylenetetrahydrofolate reductase. Chin Med Sci J 2000; 15:119-20. [PMID: 12901638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
OBJECTIVE In order to investigate 5,10-methylenetetrahydrofolate reductase (MTHFR)'s polymorphic changes in psoriasis vulgaris. METHODS We detected mutation of site C677V of MTHFR in 39 psoriastics by PCR-RFLP. RESULTS Genotype frequencies of the psoriastics were C/C=20.15%, C/T=48.72% and T/T=30.77%; the allelic frequencies were C=0.4487 and T=0.5513. Homozygous mutant (TT) of the psoriastics was significantly different from the normal control group by X2 test. CONCLUSION C677V mutant of MTHFR might be related with psoriasis.
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Affiliation(s)
- W Baiqiu
- Department of Medical Genetics, Harbin Medical University, Harbin 150086
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Pu L, Bao GB, Ma L, Pei G. Acute desensitization of nociceptin/orphanin FQ inhibition of voltage-gated calcium channels in freshly dissociated hippocampal neurons. Eur J Neurosci 1999; 11:3610-6. [PMID: 10564368 DOI: 10.1046/j.1460-9568.1999.00776.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Nociceptin/orphanin FQ (N/OFQ), an endogenous ligand for opioid receptor-like receptor, has been shown to inhibit high-voltage-gated calcium channels (VGCCs) in acutely dissociated rat hippocampal pyramidal cells [Knoflach, F., Reinscheid, R.K., Civelli, O. & Kemp, J.A. (1996), J. Neurosci., 16, 6657]. In this study, it was further demonstrated that N/OFQ inhibition of calcium channel current was blocked by its specific antagonist PGN, [Phe1-psi(CH2-NH)-Gly2]nociceptin (1-13)-NH2, and the EC50 of the N/OFQ inhibition was approximately 10 nM, indicating that this effect was really mediated via the opioid receptor-like receptor. The N/OFQ inhibition of the calcium channel current was significantly reduced, as the maximal inhibition decreased from 36 to 23%, by 1-min pretreatment of freshly dissociated hippocampal neurons with the same peptide. The inhibition completely recovered from this acute desensitization in less than 20 min. The N/OFQ inhibition was also greatly attenuated by pretreatment of the neurons with the GABAB (gamma-aminobutyric acid) agonist baclofen while the baclofen inhibition of the calcium channel current was significantly reduced by N/OFQ pretreatment, revealing the agonist-induced desensitization was heterologous in nature. This desensitization was blocked by pretreating the neurons with the sodium channel blocker, tetrodotoxin (TTX), or by removing the extracellular calcium, which indicates the necessity of membrane depolarization and extracellular calcium influx in the process. Furthermore, pretreatment of the neurons with the protein kinase C (PKC) activator, phorbol 12-myristate 13-acetate (PMA), attenuated the N/OFQ inhibition of the calcium channel current whereas the cAMP-dependent kinase A activator, forskolin, showed no effect, suggesting the probable involvement of PKC in the N/OFQ-induced desensitization.
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Affiliation(s)
- L Pu
- Shanghai Institute of Cell Biology, Shanghai Research Center of Life Sciences, Chinese Academy of Sciences, People's Republic of China
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Abstract
Brain membrane lipid fatty acid composition and consequently membrane fluidity change with increasing age. Intracellular fatty acid binding proteins (FABPs) such as heart H-FABP and the brain specific B-FABP, detected by immunoblotting of brain tissue, are thought to be involved in fatty acid uptake, metabolism, and differentiation in brain. Yet, almost nothing is known regarding the effect of age on the expression of the cytosolic fatty acid binding proteins (FABPs) or their content in brain subfractions. Electrophoresis and quantitative immunoblotting were used to examine the content of these FABPs in synaptosomes in brains from 4, 15, and 25 month old C57BL/6NNia male mice. Brain H-FABP and B-FABP were differentially expressed in mouse brain subcellular fractions. Brain H-FABP was highly concentrated in synaptosomal cytosol. The level of brain H-FABP in synaptosomes, synaptosomal cytosol, and intrasynaptosomal membranes was decreased 33, 35, and 43%, respectively, in 25 month old mice. B-FABP was detected in lower quantity than H-FABP. More important, B-FABP decreased in synaptosomes, synaptic plasma membranes, and synaptosomal cytosol from brains of 25 month old mice. In contrast to H-FABP, B-FABP was not detectable in the intrasynaptosomal membranes in any of the three age groups of mice. In conclusion, expression of both H-FABP and B-FABP was markedly reduced in aged mouse brain. Age differences in brain H-FABP and B-FABP levels in synaptosomal plasma membranes and synaptosomal cytosol may be important factors modulating neuronal differentiation and function.
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Affiliation(s)
- L Pu
- Department of Physiology and Pharmacology, Texas A&M University, TVMC, College Station 77843-4466, USA
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