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Tong S, Xia T, Fan K, Jiang K, Zhai W, Li JS, Wang SH, Wang JJ. 14-3-3ζ promotes lung cancer cell invasion by increasing the Snail protein expression through atypical protein kinase C (aPKC)/NF-κB signaling. Exp Cell Res 2016; 348:1-9. [PMID: 27554601 DOI: 10.1016/j.yexcr.2016.08.014] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/07/2016] [Accepted: 08/19/2016] [Indexed: 12/25/2022]
Abstract
14-3-3ζ has been identified as a putative oncogene in several cancers, including non-small cell lung cancer (NSCLC). However, the mechanisms underlying its functions remain undefined. In this study, we show that overexpression of 14-3-3ζ was frequently detected in lung adenocarcinoma (LuAC) tissues and was significantly associated with lymph node metastasis and poor outcome. Functional studies demonstrated that 14-3-3ζ promoted migration and invasion in A549 cells, both of which were effectively inhibited when 14-3-3ζ was silenced with short hairpin RNA (shRNA). Furthermore, 14-3-3ζ-mediated invasion of cancer cells was found to upregulate Snail through the activation of atypical protein kinase C (aPKC). Activation of aPKCζ mediates this effect by stimulating NF-κB signaling. Our results identify a specific pathway by which 14-3-3ζ induces tumor invasion and provide insight into potential therapeutic approaches to target 14-3-3ζ-associated lung adenocarcinoma.
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Affiliation(s)
- Song Tong
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tian Xia
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Kai Fan
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Ke Jiang
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Zhai
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jing-Song Li
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Si-Hua Wang
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
| | - Jian-Jun Wang
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Jiang B, Le L, Zhai W, Wan W, Hu K, Yong P, He C, Xu L, Xiao P. Protective effects of marein on high glucose-induced glucose metabolic disorder in HepG2 cells. Phytomedicine 2016; 23:891-900. [PMID: 27387397 DOI: 10.1016/j.phymed.2016.05.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [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: 11/02/2015] [Revised: 04/06/2016] [Accepted: 05/13/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Our previous study has shown that Coreopsis tinctoria increases insulin sensitivity and regulates hepatic metabolism in high-fat diet (HFD)-induced insulin resistance rats. However, it is unclear whether or not marein, a major compound of C. tinctoria, could improve insulin resistance. Here we investigate the effect and mechanism of action of marein on improving insulin resistance in HepG2 cells. METHODS We investigated the protective effects of marein in high glucose-induced human liver carcinoma cell HepG2. In kinase inhibitor studies, genistein, LY294002, STO-609 and compound C were added to HepG2 cells 1h before the addition of marein. Transfection with siRNA was used to knock down LKB1, and 2-(N-(7-nitrobenz-2-oxa-1, 3-diazol-4-yl) amino)-2-deoxyglucose (2-NBDG), an effective tracer, was used to detect glucose uptake. RESULTS The results showed for the first time that marein significantly stimulates the phosphorylation of AMP-activated protein kinase (AMPK) and the Akt substrate of 160kDa (AS160) and enhanced the translocation of glucose transporter 1 (GLUT1) to the plasma membrane. Further study indicated that genistein (an insulin receptor tyrosine kinase inhibitor) altered the effect of marein on glucose uptake, and both LY294002 (a phosphatidylinositol 3-kinase inhibitor) and compound C (an AMP-activated protein kinase inhibitor) significantly decreased marein-stimulated 2-NBDG uptake. Additionally, marein-stimulated glucose uptake was blocked in the presence of STO-609, a CaMKK inhibitor; however, marein-stimulated AMPK phosphorylation was not blocked by LKB1 siRNA in HepG2 cells. Marein also inhibited the phosphorylation of insulin receptor substrate (IRS-1) at Ser 612, but inhibited GSK-3β phosphorylation and increased glycogen synthesis. Moreover, marein significantly decreased the expression levels of FoxO1, G6Pase and PEPCK. CONCLUSIONS Consequently, marein improved insulin resistance induced by high glucose in HepG2 cells through CaMKK/AMPK/GLUT1 to promote glucose uptake, through IRS/Akt/GSK-3β to increase glycogen synthesis, and through Akt/FoxO1 to decrease gluconeogenesis. Marein could be a promising leading compound for the development of hypoglycemic agent or developed as an adjuvant drug for diabetes mellitus.
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Affiliation(s)
- Baoping Jiang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 151 Malianwa North, Haidian District, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Liang Le
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 151 Malianwa North, Haidian District, Beijing 100193, China
| | - Wei Zhai
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 151 Malianwa North, Haidian District, Beijing 100193, China
| | - Wenting Wan
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 151 Malianwa North, Haidian District, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Keping Hu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 151 Malianwa North, Haidian District, Beijing 100193, China
| | - Peng Yong
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 151 Malianwa North, Haidian District, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Chunnian He
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 151 Malianwa North, Haidian District, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Lijia Xu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 151 Malianwa North, Haidian District, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China
| | - Peigen Xiao
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, 151 Malianwa North, Haidian District, Beijing 100193, China; Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Ministry of Education, Beijing, China.
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203
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Tan Y, Ma X, Wang Q, Zhao Z, Zhai W, Guo Y. [Investigation for use of The Name and Location of Acupoints(GB/T 12346-2006), national standard]. Zhongguo Zhen Jiu 2016; 36:871-874. [PMID: 29231577 DOI: 10.13703/j.0255-2930.2016.08.025] [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
To understand the use in recent 10 years of The Name and Location of Acupoints(GB/T 12346-2006),a standard of The People's Republic of China,so as to provide the evidence for its further establishment and revision,we investigated and analyzed the application of The Name and Location of Acupoints through relevant literature and the textbook. It is found that making use of the standard is being realized in various types of articles and it is described in almost all the textbooks. Implementing the standard intensively promotes the standardization of acupuncture-moxibustion education and clinical manipulation as well as the academic exchange domestically and overseas. In turn,its scientificalness and authority are further strengthened.
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Affiliation(s)
- Yaqin Tan
- Inner Mongolia Medical University, Huhehot 010050, China
| | - Xinting Ma
- Inner Mongolia Medical University, Huhehot 010050, China
| | - Qi Wang
- Inner Mongolia Medical University, Huhehot 010050, China
| | - Zhongyuan Zhao
- Inner Mongolia Medical University, Huhehot 010050, China
| | | | - Yi Guo
- Tianjin University of TCM
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204
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Nahar R, Zhai W, Zhang T, Takano A, Khng A, Lee Y, Liu X, Lim C, Lim T, Koh T, Aung Z, Teo A, Chan C, Toh C, Lim W, Lim B, Tam W, Tan E, Tan D, Hillmer A. Evolutionary trajectory of Asian EGFR mutation positive lung adenocarcinomas leads to “high intratumor heterogeneity”. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61036-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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205
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Luo J, Hang X, Zhai W, Qi B, Song W, Chen X, Wan Y. Refining sugarcane juice by an integrated membrane process: Filtration behavior of polymeric membrane at high temperature. J Memb Sci 2016. [DOI: 10.1016/j.memsci.2016.02.053] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [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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206
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Zhai W, Peebles E, Schilling M, Mercier Y. Effects of dietary lysine and methionine supplementation on Ross 708 male broilers from 21 to 42 d of age (I): growth performance, meat yield, and cost effectiveness. J APPL POULTRY RES 2016. [DOI: 10.3382/japr/pfw002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [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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207
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Wang X, Farnell Y, Peebles E, Kiess A, Wamsley K, Zhai W. Effects of prebiotics, probiotics, and their combination on growth performance, small intestine morphology, and resident Lactobacillus of male broilers. Poult Sci 2016; 95:1332-40. [DOI: 10.3382/ps/pew030] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 12/22/2015] [Indexed: 11/20/2022] Open
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208
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Zhai W, Peebles E, Wang X, Gerard P, Olanrewaju H, Mercier Y. Effects of dietary lysine and methionine supplementation on Ross 708 male broilers from 21 to 42 d of age (III): serum metabolites, hormones, and their relationship with growth performance. J APPL POULTRY RES 2016. [DOI: 10.3382/japr/pfw004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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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209
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Zhai W, Schilling M, Jackson V, Peebles E, Mercier Y. Effects of dietary lysine and methionine supplementation on Ross 708 male broilers from 21 to 42 days of age (II): breast meat quality. J APPL POULTRY RES 2016. [DOI: 10.3382/japr/pfw003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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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210
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Ge J, Cheng B, Qi B, Peng W, Wen H, Bai L, Liu Y, Zhai W. Cloning and functional analysis of human acyl coenzyme A: Cholesterol acyltransferase1 gene P1 promoter. Mol Med Rep 2016; 14:831-8. [PMID: 27220725 DOI: 10.3892/mmr.2016.5295] [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] [Received: 05/29/2015] [Accepted: 04/13/2016] [Indexed: 11/05/2022] Open
Abstract
Acyl-coenzyme A: cholesterol acyltransferase 1 (ACAT1) catalyzes the conversion of free cholesterol (FC) to cholesterol ester. The human ACAT1 gene P1 promoter has been cloned. However, the activity and specificity of the ACAT1 gene P1 promoter in diverse cell types remains unclear. The P1 promoter fragment was digested with KpnI/XhoI from a P1 promoter cloning vector, and was subcloned into the multiple cloning site of the Firefly luciferase vector pGL3‑Enhancer to obtain the construct P1E‑1. According to the analysis of biological information, the P1E‑1 plasmid was used to generate deletions of the ACAT1 gene P1 promoter with varying 5' ends and an identical 3' end at +65 by polymerase chain reaction (PCR). All the 5'‑deletion constructs of the P1 promoter were identified by PCR, restriction enzyme digestion mapping and DNA sequencing. The transcriptional activity of each construct was detected after transient transfection into THP‑1, HepG2, HEK293 and Hela cells using DEAE‑dextran and Lipofectamine 2000 liposome transfection reagent. Results showed that the transcriptional activity of the ACAT1 gene P1 promoter and deletions of P1 promoter in THP‑1 and HepG2 cells was higher than that in HEK293 and HeLa cells. Moreover, the transcriptional activity of P1E‑9 was higher compared with those of other deletions in THP‑1, HepG2, HEK293 and HeLa cells. These findings indicate that the transcriptional activity of the P1 promoter and the effects of deletions vary with different cell lines. Thus, the P1 promoter may drive ACAT1 gene expression with cell‑type specificity. In addition, the core sequence of ACAT1 gene P1 promoter was suggested to be between -125 and +65 bp.
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Affiliation(s)
- Jing Ge
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Bei Cheng
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Benling Qi
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Wen Peng
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Hui Wen
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Lijuan Bai
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Yun Liu
- Department of Geriatrics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
| | - Wei Zhai
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430022, P.R. China
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Ma T, Chen T, Li P, Ye Z, Zhai W, Jia L, Chen W, Sun A, Huang Y, Wei S, Li Z. Heme oxygenase-1 (HO-1) protects human lens epithelial cells (SRA01/04) against hydrogen peroxide (H2O2)-induced oxidative stress and apoptosis. Exp Eye Res 2016; 146:318-329. [DOI: 10.1016/j.exer.2016.02.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 02/02/2016] [Accepted: 02/29/2016] [Indexed: 02/07/2023]
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212
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Zhai W, Sun Y, Jiang M, Wang M, Gasiewicz TA, Zheng J, Chang C. Differential regulation of LncRNA-SARCC suppresses VHL-mutant RCC cell proliferation yet promotes VHL-normal RCC cell proliferation via modulating androgen receptor/HIF-2α/C-MYC axis under hypoxia. Oncogene 2016; 35:4866-80. [PMID: 26973243 DOI: 10.1038/onc.2016.19] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 11/22/2015] [Accepted: 12/07/2015] [Indexed: 02/06/2023]
Abstract
It is well established that hypoxia contributes to tumor progression in a hypoxia inducible factor-2α (HIF-2α)-dependent manner in renal cell carcinoma (RCC), yet the role of long noncoding RNAs (LncRNAs) involved in hypoxia-mediated RCC progression remains unclear. Here we demonstrate that LncRNA-SARCC (Suppressing Androgen Receptor in Renal Cell Carcinoma) is differentially regulated by hypoxia in a von Hippel-Lindau (VHL)-dependent manner both in RCC cell culture and clinical specimens. LncRNA-SARCC can suppress hypoxic cell cycle progression in the VHL-mutant RCC cells while derepress it in the VHL-restored RCC cells. Mechanism dissection reveals that LncRNA-SARCC can post-transcriptionally regulate androgen receptor (AR) by physically binding and destablizing AR protein to suppress AR/HIF-2α/C-MYC signals. In return, HIF-2α can transcriptionally regulate the LncRNA-SARCC expression via binding to hypoxia-responsive elements on the promoter of LncRNA-SARCC. The negative feedback modulation between LncRNA-SARCC/AR complex and HIF-2α signaling may then lead to differentially modulated RCC progression in a VHL-dependent manner. Together, these results may provide us a new therapeutic approach via targeting this newly identified signal from LncRNA-SARCC to AR-mediated HIF-2α/C-MYC signals against RCC progression.
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Affiliation(s)
- W Zhai
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China.,George Whipple Lab for Cancer Research, Departments of Pathology, Urology, Radiation Oncology and the Wilmot Cancer Center, University of Rochester Medical Center, Rochester, NY, USA
| | - Y Sun
- George Whipple Lab for Cancer Research, Departments of Pathology, Urology, Radiation Oncology and the Wilmot Cancer Center, University of Rochester Medical Center, Rochester, NY, USA
| | - M Jiang
- Lab of Nuclear Receptors and Cancer Research, School of Medicine, Nantong University, Nantong, Jiangsu, China
| | - M Wang
- George Whipple Lab for Cancer Research, Departments of Pathology, Urology, Radiation Oncology and the Wilmot Cancer Center, University of Rochester Medical Center, Rochester, NY, USA
| | - T A Gasiewicz
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, NY, USA
| | - J Zheng
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - C Chang
- George Whipple Lab for Cancer Research, Departments of Pathology, Urology, Radiation Oncology and the Wilmot Cancer Center, University of Rochester Medical Center, Rochester, NY, USA.,Sex Hormone Research Center, China Medical University/Hospital, Taichung, Taiwan
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213
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Abstract
BiOBr dominated with {110} facets giving a specific rate constant 3 times as high as BiOBr with {001} facets, and its much stronger internal electric field was believed to be the main reason.
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Affiliation(s)
- Zao Fan
- School of Chemistry and Chemical Engineering
- University of South China
- Hengyang 421001
- China
| | - Yubao Zhao
- School of Chemistry and Chemical Engineering
- University of South China
- Hengyang 421001
- China
- Linde-Robinson Laboratory
| | - Wei Zhai
- School of Chemistry and Chemical Engineering
- University of South China
- Hengyang 421001
- China
| | - Liang Qiu
- School of Chemistry and Chemical Engineering
- University of South China
- Hengyang 421001
- China
| | - Hui Li
- School of Chemistry and Chemical Engineering
- University of South China
- Hengyang 421001
- China
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214
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Xing S, Wang J, Zhai W, Xia T, Wang C. Surgical Treatment of Enormous Recurrent Dermatofibrosarcoma Protuberans. Thorac Cardiovasc Surg Rep 2015; 4:2-4. [PMID: 26693116 PMCID: PMC4670313 DOI: 10.1055/s-0034-1387822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 07/11/2014] [Indexed: 11/14/2022] Open
Abstract
A patient with enormous recurrent dermatofibrosarcoma protuberans underwent modified three-dimensional histology surgery. Frozen-section examination was used to identify the margins. The patient had a normal postoperative course.
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Affiliation(s)
- Shijie Xing
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianjun Wang
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Zhai
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tian Xia
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chuanxiao Wang
- Department of Thoracic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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215
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Che YQ, Zhao JQ, Zhai W, Wang WL, Wang JC, Kang XH. [Vacuum sealing drainage combined with discontinuous windowing technique for repairing large area exposed wound of Achilles tendon]. Zhongguo Gu Shang 2015; 28:1153-1155. [PMID: 26911128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE To explore clinical effect of vacuum sealing drainage (VSD) combined with discontinuous windowing technique for repairing large area exposed wounds of Achilles tendon. METHODS From July 2009 to May 2014, 11 patients with large exposed wounds of Achilles tendon were treated, including 5 males and 6 females with an average age of 43 years old (aged from 7 to 65 years old). Among them, 4 cases were skin necrosis caused by heavy objects abrasion and contusion; 3 cases were caused by distal tibiofibula fractures; 3 cases were caused by bicycle-spoke injuries; 1 case was caused by diabetes. Areas of exposed Achilles tendon were from 6 cmx3 cm to 14 cmx5 cm without tendon rupture or bone exposed. After debridement, discontinuous fenestration on Achilles tendon was made by knife blade parallel with longitudinal axis of Achilles tendon, combined with Vacuum Sealing Drainage (VSD) treatment. RESULTS After drainage treatment with one VSD cycle (5 to 7 days), abundant fresh granulation tissues were growing on all wounds and survived well after the second phase dermatoplasty. All patients were followed up for 12 to 24 months, the color of skin flap was good, the texture was soft without burst. At 3 to 4 months after operation, subcutaneous fat was appeared under the flap, the skin was sliding, movement of ankle joints was good. No delayed Achilles tendon rupture were occurred. CONCLUSION Vacuum sealing drainage (VSD) combined with discontinuous fenestration is a simple, safe and effective method for repairing large area exposed wounds of Achilles tendon,which could minimize the secondary damage caused by wounds of skin flap grafting.
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216
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Liu X, Jia SQ, Wang CY, Liu Z, Gu JC, Zhai W, Li SM, Zhang XD, Zhu DH, Huang HJ, An D. [A Study of the Relationship Among Genetic Distances, NIR Spectra Distances, and NIR-Based Identification Model Performance of the Seeds of Maize Iinbred Lines]. Guang Pu Xue Yu Guang Pu Fen Xi 2015; 35:2510-2515. [PMID: 26669157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
This paper explored the relationship among genetic distances, NIR spectra distances and NIR-based identification model performance of the seeds of maize inbred lines. Using 3 groups (total 15 pairs) of maize inbred lines whose genetic distaches are different as experimental materials, we calculates the genetic distance between these seeds with SSR markers and uses Euclidean distance between distributed center points of maize NIR spectrum in the PCA space as the distances of NIR spectrum. BPR method is used to build identification model of inbred lines and the identification accuracy is used as a measure of model identification performance. The results showed that, the correlation of genetic distance and spectra distancesis 0.9868, and it has a correlation of 0.9110 with the identification accuracy, which is highly correlated. This means near-Infrared spectrum of seedscan reflect genetic relationship of maize inbred lines. The smaller the genetic distance, the smaller the distance of spectrum, the poorer ability of model to identify. In practical application, near infrared spectrum analysis technology has the potential to be used to analyze maize inbred genetic relations, contributing much to genetic breeding, identification of species, purity sorting and so on. What's more, when creating a NIR-based identification model, the impact of the maize inbred lines which have closer genetic relationship should be fully considered.
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217
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Zhai W, Jin X, Gong Y, Qu LH, Zhao C, Li ZH. Phenotype of Usher syndrome type II assosiated with compound missense mutations of c.721 C>T and c.1969 C>T in MYO7A in a Chinese Usher syndrome family. Int J Ophthalmol 2015; 8:670-4. [PMID: 26309859 DOI: 10.3980/j.issn.2222-3959.2015.04.05] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Accepted: 03/02/2015] [Indexed: 11/02/2022] Open
Abstract
AIM To identify the pathogenic mutations in a Chinese pedigree affected with Usher syndrome type II (USH2). METHODS The ophthalmic examinations and audiometric tests were performed to ascertain the phenotype of the family. To detect the genetic defect, exons of 103 known RDs -associated genes including 12 Usher syndrome (USH) genes of the proband were captured and sequencing analysis was performed to exclude known genetic defects and find potential pathogenic mutations. Subsequently, candidate mutations were validated in his pedigree and 100 normal controls using polymerase chain reaction (PCR) and Sanger sequencing. RESULTS The patient in the family occurred hearing loss (HL) and retinitis pigmentosa (RP) without vestibular dysfunction, which were consistent with standards of classification for USH2. He carried the compound heterozygous mutations, c.721 C>T and c.1969 C>T, in the MYO7A gene and the unaffected members carried only one of the two mutations. The mutations were not present in the 100 normal controls. CONCLUSION We suggested that the compound heterozygous mutations of the MYO7A could lead to USH2, which had revealed distinguished clinical phenotypes associated with MYO7A and expanded the spectrum of clinical phenotypes of the MYO7A mutations.
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Affiliation(s)
- Wei Zhai
- Department of Ophthalmology, General Hospital of Chinese PLA, Beijing 100853, China ; School of Medicine, Nan Kai University, Tianjin 300071, China ; Key Lab of Visual Damage, and Regeneration & Restoration of Chongqing, Chongqing 400038, China
| | - Xin Jin
- Department of Ophthalmology, General Hospital of Chinese PLA, Beijing 100853, China
| | - Yan Gong
- Department of Ophthalmology, General Hospital of Chinese PLA, Beijing 100853, China
| | - Ling-Hui Qu
- Key Lab of Visual Damage, and Regeneration & Restoration of Chongqing, Chongqing 400038, China ; Department of Ophthalmology, No.181 Hospital of Guilin, Guilin 541000, Guangxi Zhuang Autonomous Region, China
| | - Chen Zhao
- Key Lab of Visual Damage, and Regeneration & Restoration of Chongqing, Chongqing 400038, China
| | - Zhao-Hui Li
- Department of Ophthalmology, General Hospital of Chinese PLA, Beijing 100853, China
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218
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Li T, Zhang C, Ding Y, Zhai W, Liu K, Bu F, Tu T, Sun L, Zhu W, Zhou F, Qi W, Hu J, Chen H, Sun X. Umbilical cord-derived mesenchymal stem cells promote proliferation and migration in MCF-7 and MDA-MB-231 breast cancer cells through activation of the ERK pathway. Oncol Rep 2015; 34:1469-77. [PMID: 26151310 DOI: 10.3892/or.2015.4109] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Accepted: 06/03/2015] [Indexed: 11/05/2022] Open
Abstract
Mesenchymal stem cells (MSCs) are known to migrate to tumor tissues and to play an important role in cancer progression. However, the effects of MSCs on tumor progression remain controversial. The purpose of the present study was to detect the effects of human umbilical cord-derived MSCs (hUC‑MSCs) on the human breast cancer cell lines MDA-MB‑231 and MCF-7 in vitro and the underlying mechanisms. MSCs were isolated and identified from umbilical cord tissues. MDA-MB‑231 and MCF-7 cells were treated with conditioned medium (CM) from 10 and 20% umbilical cord MSCs (UC-MSCs), and the resulting changes in proliferation and migration were investigated. The 3-(4,5-dimethyl-2-thiazolyl)‑2,5-diphenyl‑2-H-tetrazolium bromide (MTT) and plate clone formation assays were used to assess the effect on proliferation, and the effects of CM on MDA-MB-231 and MCF-7 migration were assessed through scratch wound and Transwell migration assays. The expression of cell proliferation- and metastasis-related genes and proteins and activation of the ERK signaling pathway were analyzed by RT-PCR and western blot assays. UC-MSCs are characteristically similar to bone marrow MSCs (BM-MSCs) and exhibit multipotential differentiation capability (i.e., osteoblasts and adipocytes). The MTT, plate clone formation, scratch wound and Transwell migration assay results revealed that 10 and 20% CM promoted the proliferation and migration to higher levels than those observed in the control group. Our findings showed that UC-MSC-CM inhibited E-cadherin expression, increased the expression of N-cadherin and proliferating cell nuclear antigen (PCNA) and enhanced the expression of ZEB1, a transcription factor involved in epithelial‑to‑mesenchymal transition (EMT), through activation of the ERK pathway. U0126, an inhibitor of ERK, reversed the effects of UC-MSC-CM on breast cancer cell proliferation and migration. We conclude that UC-MSCs promote the proliferation and migration of breast cancer cell lines via activation of the ERK pathway.
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Affiliation(s)
- Tao Li
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Chunfu Zhang
- The Second People's Hospital of Kunshan, Kunshan, Jiangsu 215300, P.R. China
| | - Yanling Ding
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Wei Zhai
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Kui Liu
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Fan Bu
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Tao Tu
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Lingxian Sun
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Wei Zhu
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Fangfang Zhou
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Wenkai Qi
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Jiabo Hu
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Huabiao Chen
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
| | - Xiaochun Sun
- School of Medicine, Jiangsu University, Jiangsu Key Laboratory of Clinical Laboratory Medicine, Zhenjiang, Jiangsu 212013, P.R. China
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219
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Jiang B, Le L, Wan W, Zhai W, Hu K, Xu L, Xiao P. The Flower Tea Coreopsis tinctoria Increases Insulin Sensitivity and Regulates Hepatic Metabolism in Rats Fed a High-Fat Diet. Endocrinology 2015; 156:2006-18. [PMID: 25774555 DOI: 10.1210/en.2015-1015] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
An infusion of Coreopsis tinctoria (CT) flowering tops is traditionally used in Portugal to control hyperglycemia; however, the effects of CT protection against high-fat diet (HFD)-induced hepatic insulin resistance have not been systematically studied and the precise mechanism of action is not clear. The metabolomic profiles of insulin-resistant rats fed a HFD and a CT-supplemented diet (HFD supplemented with CT drinking) for 8 weeks were investigated. Serum samples for clinical biochemistry and liver samples for histopathology and liquid chromatography-mass spectrometry-based metabolomic research were collected. Western blot and quantitative real-time PCR analyses were further used to measure the expression of several relevant enzymes together with perturbed metabolic pathways. Using analysis software, the CT treatment was found to significantly ameliorate the disturbance in 10 metabolic pathways. Combined metabolomic, Western blot, and quantitative real-time PCR analyses revealed that CT treatment significantly improved the glucose homeostasis by, on the one hand, through inhibiting the expression of gluconeogenic pathway key proteins glucose-6-phosphatase and phosphoenolpyruvate carboxykinase and, on the other hand, via regulating the mRNA or protein levels of the Krebs cycle critical enzymes (citrate synthase, succinate dehydrogenase complex, subunit A, flavoprotein, and dihydrolipoamide S-succinyltransferase). These results provide metabolic evidence of the complex pathogenic mechanism involved in hepatic insulin resistance and that the supplementation with CT improves insulin resistance at a global scale. Liquid chromatography-mass spectrometry-based metabolomics approaches are helpful to further understand diabetes-related mechanisms.
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Affiliation(s)
- Baoping Jiang
- Institute of Medicinal Plant Development (B.J., L.L., W.W., W.Z., K.H., L.X., P.X.), Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100194, China; and Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (B.J., W.W., L.X., P.X.), Ministry of Education, Beijing 100194, China
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220
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Bello A, Nascimento M, Pelici N, Womack S, Zhai W, Gerard P, Peebles E. Effects of the in ovo injection of 25-hydroxycholecalciferol on the yolk and serum characteristics of male and female broiler embryos
,. Poult Sci 2015; 94:734-9. [DOI: 10.3382/ps/pev017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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221
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Wang X, Peebles E, Morgan T, Harkess R, Zhai W. Protein source and nutrient density in the diets of male broilers from 8 to 21 d of age: Effects on small intestine morphology. Poult Sci 2015; 94:61-7. [DOI: 10.3382/ps/peu019] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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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222
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Bello A, Hester P, Gerard P, Zhai W, Peebles E. Effects of commercial in ovo injection of 25-hydroxycholecalciferol on bone development and mineralization in male and female broilers , ,. Poult Sci 2014; 93:2734-9. [DOI: 10.3382/ps.2014-03981] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [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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223
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Hong ZY, Lü P, Geng DL, Zhai W, Yan N, Wei B. The near-field acoustic levitation of high-mass rotors. Rev Sci Instrum 2014; 85:104904. [PMID: 25362441 DOI: 10.1063/1.4898120] [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] [Indexed: 06/04/2023]
Abstract
Here we demonstrate that spherical rotors with 40 mm diameter and 0-1 kg mass can be suspended more than tens of micrometers away from an ultrasonically vibrating concave surface by near-field acoustic radiation force. Their rotating speeds exceed 3000 rpm. An acoustic model has been developed to evaluate the near-field acoustic radiation force and the resonant frequencies of levitation system. This technique has potential application in developing acoustic gyroscope.
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Affiliation(s)
- Z Y Hong
- Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China
| | - P Lü
- Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China
| | - D L Geng
- Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China
| | - W Zhai
- Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China
| | - N Yan
- Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China
| | - B Wei
- Department of Applied Physics, Northwestern Polytechnical University, Xi'an 710072, China
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224
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Zhai W, Peebles E, Mejia L, Zumwalt C, Corzo A. Effects of dietary amino acid density and metabolizable energy level on the growth and meat yield of summer-reared broilers. J APPL POULTRY RES 2014. [DOI: 10.3382/japr.2014-00961] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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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225
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Liu Q, Zhai W, Tan YQ, Huang J. [Analysis on evaluation tool for literature quality in clinical study]. Zhongguo Zhen Jiu 2014; 34:919-922. [PMID: 25509756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The tools used for the literature quality evaluation are introduced. The common evaluation tools that are publicly and extensively used for the evaluation of clinical trial literature quality in the world are analyzed, including Jadad scale, Consolidated Standards of Reporting Trials (CONSORT) statement and Grades of Recommendations Assessment, Development and Evaluation (GRADE) system and the others. Additionally, the present development, updates and applications of these tools are involved in analysis.
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226
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Wang X, Peebles ED, Zhai W. Effects of protein source and nutrient density in the diets of male broilers from 8 to 21 days of age on their subsequent growth, blood constituents, and carcass compositions. Poult Sci 2014; 93:1463-74. [PMID: 24879696 DOI: 10.3382/ps.2013-03838] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The effects of protein source and amino acid (AA) and AME levels in the diets of male broilers from 8 to 21 d of age on subsequent growth and blood and carcass traits were investigated in the current study. Fourteen Ross × Ross 708 male broiler chicks were randomly allocated to each of 80 floor pens arranged in a randomized complete block design. Each diet contained 1 of 2 dietary protein sources (high inclusion of distillers dried grains with solubles or high inclusion of meat and bone meal), 1 of 2 AA densities (moderate or 10% higher), and 1 of 2 AME densities (2,998 or 3,100 kcal/kg). Experimental diets were fed from 8 to 21 d of age, and common diets from 1 to 7 and 21 to 55 d of age. The higher AME density in high inclusion of meat and bone meal diets increased serum triglyceride and cholesterol levels on d 20. The dietary inclusion of high inclusion of distillers dried grains with solubles or lower levels of AA increased high-density lipoprotein cholesterol on d 20. Feeding the high-AA-density diet decreased feed intake without affecting BW gain, which resulted in a lower feed conversion ratio (FCR). A high-AME-density diet lowered feed intake but increased BW gain, which resulted in a lower FCR from 8 to 21 d of age. Feed intake, BW gain, FCR from 21 to 54 d of age, and carcass weight on 42 and 55 d of age were not affected by treatments from 8 to 21 d of age. However, early dietary manipulation from 8 to 21 d of age affected fat and meat yield at 42 and 55 d of age. Moreover, a high-AME diet decreased feed cost per carcass weight gain from 8 to 55 d of age. In conclusion, high AA or AME densities during the grower phase, from d 8 to 21 of age, may improve growth during the grower feeding phase, but may also affect meat yield during the latter grow-out phases. Furthermore, high-AME diets from 8 to 21 d of age may save on feed costs for meat production.
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Affiliation(s)
- X Wang
- Department of Poultry Science, Mississippi State University, Mississippi State 39762
| | - E D Peebles
- Department of Poultry Science, Mississippi State University, Mississippi State 39762
| | - W Zhai
- Department of Poultry Science, Mississippi State University, Mississippi State 39762
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227
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Zhai W, Zhu HJ, Wang L, Liu XM, Yang H. Study of PVDF-HFP/PMMA blended micro-porous gel polymer electrolyte incorporating ionic liquid [BMIM]BF4 for Lithium ion batteries. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.04.076] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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228
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Hong ZY, Zhai W, Yan N, Wei B. Measurement and simulation of acoustic radiation force on a planar reflector. J Acoust Soc Am 2014; 135:2553-2558. [PMID: 24815239 DOI: 10.1121/1.4869678] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The accurate calculation of the acoustic radiation force is important for ultrasonic application techniques. Usually, the acoustic radiation force can be divided into the near-field and the far-field force according to the ratio of the emitter-reflector distance to the wavelength. In this study, appropriate theories and methods are explored to simulate the far-field and the near-field acoustic radiation force exerted on a planar reflector. The comparison between simulation and experiment indicates that the far-field force is not sensitive to the boundary shape and size while the near-field force is highly sensitive to the boundary size. Only the acoustic model with the minimized boundary size could yield the near-field force consistent with the experiment. Further calculations reveal that the far-field force first increases and then decreases with the rise of the reflector radius, and that the near-field force fluctuates with the acoustic frequency, especially when the emitter-reflector distance is very small. The near-field repulsive force can be changed into the attractive force when the acoustic frequency is lowered.
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Affiliation(s)
- Z Y Hong
- MOE Key Laboratory of Space Applied Physics and Chemistry, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
| | - W Zhai
- MOE Key Laboratory of Space Applied Physics and Chemistry, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
| | - N Yan
- MOE Key Laboratory of Space Applied Physics and Chemistry, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
| | - B Wei
- MOE Key Laboratory of Space Applied Physics and Chemistry, Northwestern Polytechnical University, Xi'an 710072, People's Republic of China
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229
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Kong X, Huo Z, Zhai W. Chiral Differentiation of Amino Acids by In-Source Collision-Induced Dissociation Mass Spectrometry. Mass Spectrom (Tokyo) 2014; 3:S0031. [PMID: 26819903 DOI: 10.5702/massspectrometry.s0031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 09/12/2013] [Accepted: 01/21/2014] [Indexed: 11/23/2022] Open
Abstract
Chiral recognition of d- and l-amino acids is achieved by a method combining electrospray ionization (ESI) and in-source collision-induced dissociation (CID) mass spectrometry (MS). Trimeric cluster ions [Cu(II)(A)(ref)2-H](+) are formed by ESI of mixtures of d- or l-analyte amino acid (A), chiral reference (ref) and CuSO4. By increasing the applied voltage in the ESI source region, the trimeric ions become unstable and dissociate progressively. Thus chiral differentiation of the analyte can be achieved by comparing the dependence of their relative intensities to a reference ion on applied voltages. The method does not need MS/MS technique, thus can be readily performed on single-stage MS instruments by turning the voltage of sampling cone.
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Affiliation(s)
- Xianglei Kong
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University
| | - Zhaiyi Huo
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University
| | - Wei Zhai
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University
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230
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Wang W, Zhai W, Luo M, Jiang G, Chen X, Li X, Wing RA, Zhu L. Chromosome landing at the bacterial blight resistance gene Xa4 locus using a deep coverage rice BAC library. Mol Genet Genomics 2014; 265:118-25. [PMID: 11370857 DOI: 10.1007/s004380000382] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Xa4 is a dominantly inherited rice gene that confers resistance to Philippine race 1 of the bacterial blight pathogen Xanthomonas oryzae pv. oryzae in rice. In order to isolate the gene by positional cloning, a bacterial artificial chromosome (BAC) library was constructed from genomic DNA isolated from an Xa4-harboring accession, IRBB56. The library contains 55,296 clones with an average insert size of 132 kb, providing 14 rice genome equivalents. Three DNA markers closely linked to Xa4 were used to screen the library. The marker RS13, a resistance gene analogue that co-segregates with Xa4, identified 18 clones, of which four and six, respectively, were simultaneously detected by the other two markers, G181 and L1044. Fingerprinting and Southern analysis indicated that these clones overlapped and define an interval spanning 420 kb. In an F2 population derived from an indica variety, IR24, and its Xa4-containing near isogenic line (NIL), IRBB4, the susceptible plants were screened in order to map the Xa4 gene genetically and physically. Out of 24 insert ends isolated from the BACs in the contig, three revealed polymorphisms between IR24 and IRBB4. Two insert ends, 56M22F and 26D24R, flanked Xa4 on each side. Based on the overlap of the BACs, six overlapping clones were considered to include the Xa4 allele, one of which, 106P13, was chosen for further investigation.
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Affiliation(s)
- W Wang
- Institute of Genetics, Chinese Academy of Sciences, Beijing
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231
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Peebles E, Pulikanti R, Zhai W, Gerard P. Relationships of incubational hatching egg characteristics to posthatch body weight and processing yield in Ross × Ross 708 broilers
,. J APPL POULTRY RES 2014. [DOI: 10.3382/japr.2013-00784] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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232
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Zhai W, Hu GH, Zheng JH, Peng B, Liu M, Huang JH, Wang GC, Yao XD, Xu YF. High expression of the secreted protein dickkopf homolog 4: roles in invasion and metastasis of renal cell carcinoma and its association with Von Hippel-Lindau gene. Int J Mol Med 2014; 33:1319-26. [PMID: 24573574 DOI: 10.3892/ijmm.2014.1673] [Citation(s) in RCA: 9] [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] [Received: 09/22/2013] [Accepted: 12/23/2013] [Indexed: 11/06/2022] Open
Abstract
The aim of this study was to investigate the effects of the dickkopf homolog 4 (DKK4)/Wnt/β-catenin signaling pathway on tumorigenesis and metastasis in clear cell renal cell carcinoma (ccRCC), as well as to elucidate the underlying mechanisms. We examined the expression of DKK4 in 30 cases of ccRCC and matched adjacent normal tissues, and investigated its correlation with clinicopathological characteristics. Stable DKK4-transfected cells were established, and DKK4 functional analyses were performed, including a T-cell factor/lymphoid enhancer factor (TCF/LEF) reporter assay, and experiments on cell viability, apoptosis, invasive capability and tumor growth in vivo. Finally, western blot analysis was performed to detect Von Hippel-Lindau (VHL) expression in 50 clinical specimens. The expression levels of the DKK4, β-catenin and β-catenin downstream target genes, cyclin D1 and c-myc, were determined in the these specimens, as well as in RCC4(-), T3-14(+) cell lines by qRT-PCR and western blot analysis. The same tests were also performed in human embryonic kidney (HEK)293 cells which were transfected with the pCDH-DKK4 plasmid. After 6 weeks the tumor weight significantly increased in the mice transfected with the tumor cells. DKK4 mRNA and protein expression levels were significantly upregulated (p<0.001). DKK4 was distinctly overexpressed (68.0%) in all patient tissues. VHL(-) samples accounted for 60.0% of all samples, while DKK4 expression was significantly upregulated in 50% of these samples, indicating a correlation with VHL(-) expression (r=0.403, p<0.05). We also observed reduced expression levels of cyclin D1, c-myc and β-catenin (to a greater extent) in the VHL(-), RCC4(-) and T3-14(+) cells, as well as in the stably transfected HEK293 cells. DKK4 may be an oncogene, and its upregulated expression may be involved in the pathogenesis of ccRCC as a downstream gene of VHL. By activating other pathways apart from the Wnt/β-catenin pathway, DKK4 may play an important role in ccRCC tumorigenesis and metastasis.
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Affiliation(s)
- Wei Zhai
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Guang-Hui Hu
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Jun-Hua Zheng
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Bo Peng
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Min Liu
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Jian-Hua Huang
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Guang-Chun Wang
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Xu-Dong Yao
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
| | - Yun-Fei Xu
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai 200072, P.R. China
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Sun H, Xin J, Zhang S, Guo Q, Lu Y, Zhai W, Zhao L, Peng W, Wang B. Anatomical and functional volume concordance between FDG PET, and T2 and diffusion-weighted MRI for cervical cancer: a hybrid PET/MR study. Eur J Nucl Med Mol Imaging 2014; 41:898-905. [PMID: 24463908 DOI: 10.1007/s00259-013-2668-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 12/05/2013] [Indexed: 01/17/2023]
Abstract
PURPOSE To evaluate the concordance among (18)F-FDG PET imaging, MR T2-weighted (T2-W) imaging and apparent diffusion coefficient (ADC) maps with diffusion-weighted (DW) imaging in cervical cancer using hybrid whole-body PET/MR. METHODS This study prospectively included 35 patients with cervical cancer who underwent pretreatment (18)F-FDG PET/MR imaging. (18)F-FDG PET and MR images were fused using standard software. The percent of the maximum standardized uptake values (SUV max) was used to contour tumours on PET images, and volumes were calculated automatically. Tumour volumes measured on T2-W and DW images were calculated with standard techniques of tumour area multiplied by the slice profile. Parametric statistics were used for data analysis. RESULTS FDG PET tumour volumes calculated using SUV max (14.30 ± 4.70) and T2-W imaging volume (33.81 ± 27.32 cm(3)) were similar (P > 0.05) at 35 % and 40 % of SUV max (32.91 ± 18.90 cm(3) and 27.56 ± 17.19 cm(3) respectively) and significantly correlated (P < 0.001; r = 0.735 and 0.766). The mean DW volume was 30.48 ± 22.41 cm(3). DW volumes were not significantly different from FDG PET volumes at either 35 % SUV max or 40 % SUV max or from T2-W imaging volumes (P > 0.05). PET subvolumes with increasing SUV max cut-off percentage showed an inverse change in mean ADC values on DW imaging (P < 0.001, ANOVA). CONCLUSION Hybrid PET/MR showed strong volume concordance between FDG PET, and T2-W and DW imaging in cervical cancer. Cut-off at 35 % or 40 % of SUV max is recommended for (18)F-FDG PET/MR SUV-based tumour volume estimation. The linear tumour subvolume concordance between FDG PET and DW imaging demonstrates individual regional concordance of metabolic activity and cell density.
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Affiliation(s)
- Hongzan Sun
- Department of Radiology, Shengjing Hospital of China Medical University, Sanhao Street No. 36, Heping District, Shenyang, Liaoning, People's Republic of China
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Zhu HJ, Zhai W, Yang M, Liu XM, Chen YC, Yang H, Shen XD. Synthesis and characterization of LiMnPO4/C nano-composites from manganese(ii) phosphate trihydrate precipitated from a micro-channel reactor approach. RSC Adv 2014. [DOI: 10.1039/c4ra01943a] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Bello A, Zhai W, Gerard P, Peebles E. Effects of the commercial in ovo injection of 25-hydroxycholecalciferol on broiler posthatch performance and carcass characteristics ,. Poult Sci 2014; 93:155-62. [DOI: 10.3382/ps.2013-03389] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [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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237
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Zhai W, Du C, Li X. A series of logic gates based on electrochemical reduction of Pb2+ in self-assembled G-quadruplex on the gold electrode. Chem Commun (Camb) 2014; 50:2093-5. [DOI: 10.1039/c3cc47763k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Zhai W, Yao XD, Xu YF, Peng B, Zhang HM, Liu M, Huang JH, Wang GC, Zheng JH. Transcriptome profiling of prostate tumor and matched normal samples by RNA-Seq. Eur Rev Med Pharmacol Sci 2014; 18:1354-1360. [PMID: 24867513] [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: 06/03/2023]
Abstract
BACKGROUND RNA-Sequencing (RNA-Seq) has greatly influenced cancer researches, and it provides an unprecedented resolution in estimating gene expression and has less signal noises compared to cDNA microarray. AIM We aimed to identify a list of protein-coding genes and lincRNAs that are expressed differentially between tumor and normal tissues. MATERIALS AND METHODS In this study, we analyzed including 10 human prostate tumor tissues and their matched normal tissues transcriptome dataset generated by recently developed RNA-Seq technology. RESULTS By aligning short reads to human RefSeq genes and lincRNAs, we identified 10 RefSeq genes that were differentially expressed between tumor and normal samples with a p-value < 0.05, which were sufficiently enough to distinguish these two groups. Further loosing the p-value cutoff to 0.1 identified an lincRNA which is antisense to Cullin-associated and neddulation-dissociated 1 (CAND1), whose expression is repressed in prostate tumor cells. By examining the expression of CAND1 and its antisense lincRNA in the transcriptome dataset, we found an interaction between them as high expression of CAND1 and low expression of lincRNA is normal samples, and verse visa in tumor samples. CONCLUSIONS These findings suggest the important usage of RNA-Seq in cancer studies for biomarker development and functional investigation.
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Affiliation(s)
- W Zhai
- Department of Urology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.
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239
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Zhu CY, Liu M, Liu YZ, Li W, Zhai W, Che JP, Yan Y, Wang GC, Zheng JH. Preventive effect of phosphodiesterase 5 inhibitor Tadalafil on experimental post-pyelonephritic renal injury in rats. J Surg Res 2014; 186:253-61. [DOI: 10.1016/j.jss.2013.07.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Revised: 07/25/2013] [Accepted: 07/30/2013] [Indexed: 12/13/2022]
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240
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Wang L, Zhu HJ, Zhai W, Cai F, Liu XM, Yang H. Study of a novel gel electrolyte based on poly-(methoxy/hexadecyl-poly(ethylene glycol) methacrylate) co-polymer plasticized with 1-butyl-3-methylimidazolium tetrafluoroborate. RSC Adv 2014. [DOI: 10.1039/c4ra03661a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [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] Open
Abstract
Compared with traditional liquid electrolytes, solid polymer electrolytes possess higher reliability and safety but lower ionic conductivity, which can be improved by incorporating plasticizers to form gel polymer electrolytes (GPEs).
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Affiliation(s)
- Long Wang
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing, P. R. China
| | - Hua-jun Zhu
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing, P. R. China
| | - Wei Zhai
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing, P. R. China
| | - Feng Cai
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing, P. R. China
| | - Xiao-min Liu
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing, P. R. China
| | - Hui Yang
- College of Materials Science and Engineering
- Nanjing Tech University
- Nanjing, P. R. China
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241
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Zhai W, Zhao Y, Zhang L, Li X. Structural and phylogenetic analysis of Pto-type disease resistance gene candidates in Hevea brasiliensis. Genet Mol Res 2014; 13:4348-60. [DOI: 10.4238/2014.june.10.2] [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: 11/03/2022]
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242
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Ge J, Zhai W, Cheng B, He P, Qi B, Lu H, Zeng Y, Chen X. Insulin induces human acyl-coenzyme A: cholesterol acyltransferase1 gene expression via MAP kinases and CCAAT/enhancer-binding protein α. J Cell Biochem 2013; 114:2188-98. [PMID: 23564383 DOI: 10.1002/jcb.24568] [Citation(s) in RCA: 18] [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: 11/28/2012] [Accepted: 04/02/2013] [Indexed: 02/05/2023]
Abstract
Insulin resistance characterized by hyperinsulinemia is associated with increased risk of atherosclerosis. Acyl-coenzyme A: cholesterol acyltransferase (ACAT) is an intracellular enzyme involved in cellular cholesterol homeostasis and in atherosclerotic foam cell formation. To investigate the relationship between hyperinsulinemia and atherosclerosis, we investigated whether insulin induced ACAT1 gene expression and found that insulin up-regulated ACAT1 mRNA, protein and enzyme activity in human THP-1 cells and THP-1-derived macrophages. Moreover, luciferase assays revealed that insulin enhanced the ACAT1 gene P1 promoter activity but not the P7 promoter. To explore the molecular mechanisms involved, deletion analysis of the human ACAT1 P1 promoter revealed an insulin response element (IRE) upstream of the P1 promoter (from -603 to -580), EMSA experiments demonstrated that CCAAT/enhancer binding protein α(C/EBPα) bound to the P1 promoter IRE. Insulin-induced ACAT1 upregulation was blocked by the presence of PD98059 (an inhibitor of extracellular signal-regulated kinase, ERK) and SB203580 (an inhibitor of p38 mitogen-activated protein kinase, p38MAPK) but not by Wortmannin (an inhibitor of phosphatidylinositol 3-kinase, PI3K) or U73122 (an inhibitor of phospholipase C-γ, PLCγ). These studies demonstrate that insulin promotes ACAT1 gene expression at the transcriptional level. The molecular mechanism of insulin action is mediated via interaction of the functional IRE upstream of the ACAT1 P1 promoter with C/EBPα and is MAPK-dependent.
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Affiliation(s)
- Jing Ge
- Department of Gerontology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China
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243
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Zhang C, Zhai W, Xie Y, Chen Q, Zhu W, Sun X. Mesenchymal stem cells derived from breast cancer tissue promote the proliferation and migration of the MCF-7 cell line in vitro.. Oncol Lett 2013; 6:1577-1582. [PMID: 24260049 PMCID: PMC3833946 DOI: 10.3892/ol.2013.1619] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [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] [Received: 04/05/2013] [Accepted: 09/25/2013] [Indexed: 01/11/2023] Open
Abstract
Mesenchymal stem cells (MSCs) are critical in promoting cancer progression, including tumor growth and metastasis. MSCs, as a subpopulation of cells found in the tumor microenvironment, have been isolated from several tumor tissues, but have not been isolated from breast cancer tissue to date. Therefore, the purpose of this study was to isolate MSCs from primary human breast cancer tissue, and to study the effect of breast cancer MSCs (BC-MSCs) on the proliferation and migration of the MCF-7 cell line in vitro. MSCs were isolated and identified from primary breast cancer tissue obtained from 9 patients. The MCF-7 cell line was treated with 10 and 20% breast cancer-associated MSC (BC-MSC)-conditioned medium (CM) for 10–48 h, and changes in proliferation and migration were observed. Furthermore, we investigated the migration of 10 and 20% CM concentrations on MCF-7 through a scratch wound assay and a transwell migration assay. We successfully isolated and identified MSCs from primary breast cancer tissues. BC-MSCs showed characteristics similar to those of bone marrow MSCs, and possessed the capability of multipotential differentiation into osteoblasts and adipocytes. The results of the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay showed that 10 and 20% CM concentrations increased the proliferation of MCF-7 cells to different levels. The results also revealed a greater increase in different levels compared with the control group. In conclusion, MSCs were confirmed to exist in human breast cancer tissues, and BC-MSCs may promote the proliferation and migration of breast cancer cells.
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Affiliation(s)
- Chunfu Zhang
- The Second People's Hospital of Kunshan, Kunshan, Jiangsu 215300, P.R. China ; School of Medical Science and Laboratory Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
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244
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Bello A, Zhai W, Gerard P, Peebles E. Effects of the commercial in ovo injection of 25-hydroxycholecalciferol on the hatchability and hatching chick quality of broilers. Poult Sci 2013; 92:2551-9. [DOI: 10.3382/ps.2013-03086] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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245
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Zhai W, Peebles E, Zumwalt C, Mejia L, Corzo A. Effects of dietary amino acid density regimens on growth performance and meat yield of Cobb × Cobb 700 broilers. J APPL POULTRY RES 2013. [DOI: 10.3382/japr.2012-00658] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [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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246
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Cai F, Zuo X, Liu XM, Wang L, Zhai W, Yang H. The study of novel gel polymer electrolytes plasticized with non-volatile tris(methoxypolyethyleneglycol) aluminate esters. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.05.079] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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247
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Zhai W, Qiu LJ, Mo XM, Wang S, Xu YF, Peng B, Liu M, Huang JH, Wang GC, Zheng JH. Coaxial electrospinning of P(LLA-CL)/heparin biodegradable polymer nanofibers: potential vascular graft for substitution of femoral artery. J Biomed Mater Res B Appl Biomater 2013:471-478. [PMID: 23744736 DOI: 10.1002/jbm.b.32972] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Revised: 03/28/2013] [Accepted: 04/21/2013] [Indexed: 11/05/2022]
Affiliation(s)
- Wei Zhai
- Department of Urology; Shanghai Tenth People's Hospital, Tongji University School of Medicine; Shanghai 200072 China
| | - Li-jun Qiu
- Institute of Biological Engineering; Donghua University; Shanghai 201620 China
| | - Xiu-mei Mo
- Institute of Biological Engineering; Donghua University; Shanghai 201620 China
| | - Sheng Wang
- Department of Intensive Care Unit; Shanghai Tenth People's Hospital, Tongji University School of Medicine; Shanghai 200072 China
| | - Yun-fei Xu
- Department of Urology; Shanghai Tenth People's Hospital, Tongji University School of Medicine; Shanghai 200072 China
| | - Bo Peng
- Department of Urology; Shanghai Tenth People's Hospital, Tongji University School of Medicine; Shanghai 200072 China
| | - Min Liu
- Department of Urology; Shanghai Tenth People's Hospital, Tongji University School of Medicine; Shanghai 200072 China
| | - Jun-hua Huang
- Department of Urology; Shanghai Tenth People's Hospital, Tongji University School of Medicine; Shanghai 200072 China
| | - Guang-chun Wang
- Department of Urology; Shanghai Tenth People's Hospital, Tongji University School of Medicine; Shanghai 200072 China
| | - Jun-hua Zheng
- Department of Urology; Shanghai Tenth People's Hospital, Tongji University School of Medicine; Shanghai 200072 China
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248
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Fan Y, Lou J, Garcia C, Zhai W, Dong J, Wen W, Conrad F, Brown J, Skerry J, Smith T, Smith L, Marks J. Monoclonal antibodies against botulinum neurotoxin serotype F. Toxicon 2013. [DOI: 10.1016/j.toxicon.2012.07.079] [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: 11/25/2022]
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249
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Lee SH, Zhang Y, Kontopoulou M, Park CB, Wong A, Zhai W. Optimization of Dispersion of Nanosilica Particles in a PP Matrix and Their Effect on Foaming. INT POLYM PROC 2013. [DOI: 10.3139/217.2403] [Citation(s) in RCA: 17] [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: 11/20/2022]
Abstract
Abstract
Nanocomposites based on isotactic polypropylene (PP) and nanosilica (SiO2) were prepared using a co-rotating twin-screw extruder (TSE). The effect of operating variables, such as screw speed and screw configuration on the dispersion of nanosilica in the polymer matrix has been studied, using TEM imaging. High shear stress, sufficient residence time, and high fill ratio in the melting section of the screw were the most important factors in achieving good nanosilica dispersion. Furthermore, the effects of filler loading and amount of a maleated polypropylene (PP-g-MA) compatibilizer on the degree of SiO2 dispersion were investigated. The foaming performance of the composites was evaluated using a batch foaming simulation system, and an extrusion foaming setup that employed respectively N2 and CO2 blowing agents. Well-dispersed surface-modified hydrophobic SiO2 particles acted as effective nucleating agents for foaming, when used at loadings below 1 phr.
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Affiliation(s)
- S. H. Lee
- Department of Chemical Engineering, Queen's University, Kingston, Canada
| | - Y. Zhang
- Department of Chemical Engineering, Queen's University, Kingston, Canada
| | - M. Kontopoulou
- Department of Chemical Engineering, Queen's University, Kingston, Canada
| | - C. B. Park
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
| | - A. Wong
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
| | - W. Zhai
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
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250
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Liu M, Xu YF, Feng Y, Zhai W, Che JP, Xia SQ, Wang GC, Zheng JH. Androgen-STAT3 activation may contribute to gender disparity in human simply renal cysts. Int J Clin Exp Pathol 2013; 6:686-694. [PMID: 23573315 PMCID: PMC3606858] [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] [Received: 01/23/2013] [Accepted: 02/22/2013] [Indexed: 06/02/2023]
Abstract
BACKGROUND Simple renal cysts (SRC) are a common urological disease mostly in elderly, however the male-to-female ratio was 2.81. Androgen receptor (AR) activation was initially proposed as a vital signaling pathway in prostate cancer and consequent signal transducer and activator of transcription 3 (STAT3)-AR complex led an important putative mechanism by which prostate cells are sensitized with growth factor signals. However, in SRC disease, no related study emerged. METHODS 30 patients with SRC and 20 age-matched healthy controls were recruited. Puncture biopsy was performed to acquire cyst-adjacent kidney tissue and normal kidney tissues were from healthy kidney donor who received living-related donor nephrectomy. The expression of STAT3 and androgen receptor was determined by immunohistochemical staining and western blotting. The in-vitro effect of androgen on human HK-2 (an immortalized proximal tubule epithelial cell line from normal adult human kidney) cells' STAT3 expression was analyzed as well. RESULTS Activated STAT3 was strongly expressed in tubular epithelial cells from kidneys of SRC patients, while it was barely found in normal kidneys. Meanwhile, the androgen receptor positive cyst epithelial cells and adjacent normal renal tubule cells were observed in kidneys from SRC patients, however, AR was weakly expressed in normal healthy male kidneys, statistically significant differences existed. In-vitro experiment demonstrated that when treated with exogenous added androgen, the expression level of STAT3 in HK-2 cells was significantly elevated. CONCLUSIONS Our data raised the possible novel evidence that androgen-STAT3 activation might contribute to gender disparity in human SRC disease and clarification the esoteric mechanisms will provide us attractive therapy target for cystic kidney disease.
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Affiliation(s)
- Min Liu
- Department of Urology & Nephrology, Shanghai Tenth People’s Hospital, Tongji UniversityShanghai, 200072, China
| | - Yun-Fei Xu
- Department of Urology & Nephrology, Shanghai Tenth People’s Hospital, Tongji UniversityShanghai, 200072, China
| | - Yuan Feng
- Department of Nephrology, Nanjing University Affiliated Drum Tower HospitalNanjing, 210093, China
| | - Wei Zhai
- Department of Urology & Nephrology, Shanghai Tenth People’s Hospital, Tongji UniversityShanghai, 200072, China
| | - Jian-Ping Che
- Department of Urology & Nephrology, Shanghai Tenth People’s Hospital, Tongji UniversityShanghai, 200072, China
| | - Sheng-Qiang Xia
- Department of Urology & Nephrology, Shanghai Tenth People’s Hospital, Tongji UniversityShanghai, 200072, China
| | - Guang-Chun Wang
- Department of Urology & Nephrology, Shanghai Tenth People’s Hospital, Tongji UniversityShanghai, 200072, China
| | - Jun-Hua Zheng
- Department of Urology & Nephrology, Shanghai Tenth People’s Hospital, Tongji UniversityShanghai, 200072, China
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