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Kang Q, Zhang J, Xie C, Fang S, Chai W. Circular RNA SLC8A1 triggers hippocampal neuronal ferroptosis by regulating FUS-mediated ATF3 mRNA stability in epilepsy. Exp Cell Res 2024; 434:113848. [PMID: 37918704 DOI: 10.1016/j.yexcr.2023.113848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 09/27/2023] [Accepted: 10/30/2023] [Indexed: 11/04/2023]
Abstract
BACKGROUND Epilepsy is a neurological disorder characterized by recurrent seizures and is often unresponsive to current treatment options. Ferroptosis, a recently defined iron-dependent regulated cell death, has been suggested as a potential therapeutic target for epilepsy due to its association with oxidative stress. Additionally, circRNA SLC8A1 (circSLC8A1) has been implicated in various neurological disorders and oxidative stress-related diseases but its involvement in epilepsy progression, particularly in relation to ferroptosis and oxidative stress, remains unclear. METHODS qRT-PCR, Western blot, IHC and ELISA assays were employed to validate the relative expression of targeted genes and proteins. The levels of ROS, iron, LOP and GSH were detected by commercial kits. RNA pull-down and RIP assays were employed to detect the interactions among circSLC8A1, FUS and ATF3. A rat epilepsy model was established for further in vivo confirmation. RESULTS AND CONCLUSION In this study, we investigated the potential involvement of circSLC8A1 in epilepsy progression and its connection to ferroptosis and oxidative stress. Our findings demonstrate that circSLC8A1 triggers neuronal ferroptosis by stabilizing ATF3 mRNA expression through recruitment with FUS. The induced neuronal ferroptosis contributes to epilepsy progression. These results enhance our understanding of epilepsy pathogenesis and may provide insights for the development of novel therapeutic strategies.
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Affiliation(s)
- Qin Kang
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi Province, PR China
| | - Ji Zhang
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi Province, PR China
| | - Chen Xie
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi Province, PR China
| | - Susu Fang
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi Province, PR China
| | - Wen Chai
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, 330006, Jiangxi Province, PR China.
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Huang C, Chen L, Li J, Ma J, Luo J, Lv Q, Xiao J, Gao P, Chai W, Li X, Zhang M, Hu F, Hu D, Qin P. Mitochondrial DNA Copy Number and Risk of Diabetes Mellitus and Metabolic Syndrome. J Clin Endocrinol Metab 2023; 109:e406-e417. [PMID: 37431585 DOI: 10.1210/clinem/dgad403] [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] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Revised: 07/04/2023] [Accepted: 07/06/2023] [Indexed: 07/12/2023]
Abstract
CONTEXT Mitochondrial DNA (mtDNA) plays a key role in diabetes mellitus and metabolic syndrome (MetS). An increasing number of studies have reported the association between mtDNA copy number (mtDNA-CN) and the risk of diabetes mellitus and MetS; however, the associations remain conflicted and a systematic review and meta-analysis on the association between mtDNA-CN and diabetes mellitus and MetS is lacking. OBJECTIVE We aimed to investigate the association of mtDNA-CN and diabetes mellitus and MetS using a systematic review and meta-analysis of observational studies. METHODS PubMed, EMBASE, and Web of Science were searched up to December 15, 2022. Random-effect models were used to summarize the relative risks (RRs) and 95% CIs. RESULTS A total of 19 articles were included in the systematic review and 6 articles (12 studies) in the meta-analysis involving 21 714 patients with diabetes (318 870 participants) and 5031 MetS (15 040 participants). Compared to the highest mtDNA-CN, the summary RR (95% CIs) for the lowest mtDNA-CN were 1.06 (95% CI, 1.01-1.12; I2 = 79.4%; n = 8) for diabetes (prospective study: 1.11 (1.02-1.21); I2 = 22.6%; n = 4; case-control: 1.27 (0.66-2.43); I2 = 81.8%; n = 2; cross-sectional: 1.01 (0.99-1.03); I2 = 74.7%; n = 2), and 1.03 (0.99-1.07; I2 = 70.6%; n = 4) for MetS (prospective: 2.87 (1.51-5.48); I2 = 0; n = 2; cross-sectional: 1.02 (1.01-1.04); I2 = 0; n = 2). CONCLUSION Decreased mtDNA-CN was associated with increased risk of diabetes mellitus and MetS when limited to prospective studies. More longitudinal studies are warranted.
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Affiliation(s)
- Cuihong Huang
- Center for Clinical Epidemiology and Evidence-based Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
- School of Public Health, Sun Yat-Sen University, Guangzhou, 510080, Guangdong, China
| | - Lifang Chen
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Jiangtao Li
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Juanjuan Ma
- Center for Clinical Epidemiology and Evidence-based Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Jun Luo
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Qian Lv
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Jian Xiao
- Department of Cardiovascular Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
| | - Pan Gao
- Department of Neurology, Shenzhen University General Hospital, Shenzhen, 518000, Guangdong, China
| | - Wen Chai
- Department of Neurology, Shenzhen University General Hospital, Shenzhen, 518000, Guangdong, China
| | - Xu Li
- Department of Neurosurgery, The Second Affiliated Hospital of Shenzhen University, Shenzhen, 518000, Guangdong, China
| | - Ming Zhang
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, 518000, Guangdong, China
| | - Fulan Hu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, 518000, Guangdong, China
| | - Dongsheng Hu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Health Science Center, Shenzhen, 518000, Guangdong, China
| | - Pei Qin
- Center for Clinical Epidemiology and Evidence-based Medicine, Shenzhen Qianhai Shekou Free Trade Zone Hospital, Shenzhen, 518000, Guangdong, China
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Maimaiti Z, Li Z, Xu C, Fu J, Hao LB, Liu L, Chen JY, Chai W. [Research progress of phage therapy in orthopedic implant-related infection]. Zhonghua Wai Ke Za Zhi 2023; 62:83-87. [PMID: 38044612 DOI: 10.3760/cma.j.cn112139-20230720-00020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/05/2023]
Abstract
The widespread application of implantable materials has brought about a corresponding increase in implant-related complications, with implant-associated infections being the most critical. Biofilms, which often form on these implants, can significantly impede the effectiveness of traditional antibiotic therapies. Therefore, strategies such as surgical removal of infected implants and prolonged antibiotic treatment have been acknowledged as effective measures to eradicate these infections. However,the challenges of antibiotic resistance and biofilm persistence often result in recurrent or hard-to-control infections, posing severe health threats to patients. Recent studies suggest that phages, a type of virus, can directly eliminate pathogenic bacteria and degrade biofilms. Furthermore, clinical trials have demonstrated promising therapeutic results with the combined use of phages and antibiotics. Consequently, this innovative therapy holds significant potential as an effective solution for managing implant-associated infections. This paper rigorously investigates and evaluates the potential value of phage therapy in addressing orthopedic implant-associated infections, based on a comprehensive review of relevant scientific literature.
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Affiliation(s)
- Zulipikaer Maimaiti
- Department of Orthopedics, Beijing Luhe Hospital, Capital Medical University, Beijing 101199, China
| | - Z Li
- The Medical School of Nankai University,Tianjin 300074,China
| | - C Xu
- Department of Orthopedics, the Fourth Medical Center, General Hospital, Chinese People's Liberation Army,Beijing 100048,China
| | - J Fu
- Department of Orthopedics, the Fourth Medical Center, General Hospital, Chinese People's Liberation Army,Beijing 100048,China
| | - L B Hao
- Department of Orthopedics, the Fourth Medical Center, General Hospital, Chinese People's Liberation Army,Beijing 100048,China
| | - L Liu
- Department of Orthopedics, Beijing Luhe Hospital, Capital Medical University, Beijing 101199, China
| | - J Y Chen
- Department of Orthopedics, the Fourth Medical Center, General Hospital, Chinese People's Liberation Army,Beijing 100048,China
| | - W Chai
- Department of Orthopedics, the Fourth Medical Center, General Hospital, Chinese People's Liberation Army,Beijing 100048,China
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Gao Y, Fu X, Hu H, Li T, Yuan L, Zhang J, Wu Y, Wang M, Ke Y, Li X, Hu F, Zhang M, Sun L, Wen H, Guan R, Gao P, Chai W, Zhao Y, Hu D. Impact of shift work on dementia: a systematic review and dose-response meta-analysis. Public Health 2023; 223:80-86. [PMID: 37625271 DOI: 10.1016/j.puhe.2023.07.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 06/26/2023] [Accepted: 07/21/2023] [Indexed: 08/27/2023]
Abstract
OBJECTIVES Although shift work has been reported as having a link to dementia, evidence remains inconsistent, and a comprehensive dose-response meta-analysis of the association is still lacking. We therefore conducted this meta-analysis to explore the association between shift work and the risk of dementia. STUDY DESIGN Systematic review and dose-response meta-analysis. METHODS PubMed, Embase, and Web of Science databases were systematically searched. Fixed or random-effects models were used to estimate the summary relative risks (RRs) and 95% confidence intervals (95% CIs). Generalized least squares regression was used to estimate dose-response associations, and restricted cubic splines were used to examine possible linear or non-linear associations. RESULTS Five articles (10 studies) with 72,999 participants and 23,067 cases were eventually included in the meta-analysis. The summary RRs and 95% CIs of dementia risk with shift work and night shift work versus daytime work were 1.13 (95% CI: 1.05-1.21, I2 = 46.70%) and 1.13 (95% CI: 1.03-1.24, I2 = 9.20%), respectively. The risk of dementia increased by 1% (RR = 1.01, 95% CI: 1.01-1.02, I2 = 41.3%) with each 1-year increase in the duration of shift work. We found a non-linear dose-response association between the duration of shift work and the risk of dementia (Pnon-linearity = 0.006). Though the shape of the curve was steeper with the duration of shift work <7 years, the increase was more gradual after 7 years. CONCLUSION Our findings suggest that shift work may be a risk factor for future dementia and that controlling the length of shift work is a feasible measure that may contribute to prevent dementia.
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Affiliation(s)
- Y Gao
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - X Fu
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - H Hu
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - T Li
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - L Yuan
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - J Zhang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - Y Wu
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - M Wang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - Y Ke
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - X Li
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - F Hu
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Medical School, Shenzhen, Guangdong, 518060, People's Republic of China
| | - M Zhang
- Department of Biostatistics and Epidemiology, School of Public Health, Shenzhen University Medical School, Shenzhen, Guangdong, 518060, People's Republic of China
| | - L Sun
- Department of Social Medicine and Health Management, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - H Wen
- Department of Clinical Medicine, Zhengzhou Shuqing Medical College, 6 Gongming Road, Erqi District, Zhengzhou, Henan, 450064, People's Republic of China
| | - R Guan
- Department of Famarcy, Shenzhen University General Hospital, Shenzhen, Guangdong, 518055, People's Republic of China
| | - P Gao
- Department of Neurology, Shenzhen University General Hospital, Shenzhen, Guangdong, 518055, People's Republic of China
| | - W Chai
- Department of Neurology, Shenzhen University General Hospital, Shenzhen, Guangdong, 518055, People's Republic of China
| | - Y Zhao
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China
| | - D Hu
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
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Kang Q, Chai W, Min J, Qu X. Yin Yang 1 suppresses apoptosis and oxidative stress injury in SH-SY5Y cells by facilitating NR4A1 expression. J Neurogenet 2023; 37:115-123. [PMID: 37922205 DOI: 10.1080/01677063.2023.2270745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2023] [Accepted: 09/06/2023] [Indexed: 11/05/2023]
Abstract
Oxidative stress plays a significant role in the development of Parkinson's disease (PD). Previous studies implicate nuclear receptor subfamily 4 group A member 1 (NR4A1) in oxidative stress associated with PD. However, the molecular mechanism underlying the regulation of NR4A1 expression remains incompletely understood. In the present study, a PD cell model was established by using 1-methyl-4-phenylpyridinium (MPP+) in SH-SY5Y cells. Cell viability and apoptosis were assessed by using CCK-8 assay and flow cytometry, respectively. The activities of LDH and SOD, and ROS generation were used as an indicators of oxidative stress. ChIP-PCR was performed to detect the interaction between Yin Yang 1 (YY1) and the NR4A1 promoter. MPP+ treatment inhibited SH-SY5Y cell viability in a dose- and time-dependent manner. NR4A1 and YY1 expression were decreased in MPP+-treated SH-SY5Y cells. Increasing NR4A1 or YY1 alleviated MPP+-induced apoptosis and oxidative stress in SH-SY5Y cells, whereas reduction of NR4A1 aggravated MPP+-induced cell injury. Transcription factor YY1 facilitated NR4A1 expression by binding with NR4A1 promoter. In addition, in MPP+-treated SH-SY5Y cells, the inhibition of NR4A1 to apoptosis and oxidative stress was further enhanced by overexpression of YY1. The reduction of NR4A1 led to an elevation of apoptosis and oxidative stress in MPP+-induced SH-SY5Y cells, and this effect was partially reversed by the overexpression of YY1. In conclusion, YY1 suppresses MPP+-induced apoptosis and oxidative stress in SH-SY5Y cells by binding with NR4A1 promoter and boosting NR4A1 expression. Our findings suggest that NR4A1 may be a candidate target for PD treatment.HIGHLIGHTSNR4A1 and YY1 are decreased in MPP+-treated SH-SY5Y cells.NR4A1 prevents oxidative stress and apoptosis in MPP+-treated SH-SY5Y cells.YY1 binds with NR4A1 promoter and increases NR4A1 expression.YY1 enhances the inhibition of NR4A1 to SH-SY5Y cell apoptosis and oxidative stress.
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Affiliation(s)
- Qin Kang
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi Province, P.R. China
| | - Wen Chai
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi Province, P.R. China
| | - Jun Min
- Department of Neurology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, P.R. China
| | - Xinhui Qu
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi Province, P.R. China
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Jiang SS, Gong MN, Rao W, Chai W, Chen WZ, Zhang X, Nie HB, Xu RS. 5-Hydroxytryptamine: a potential therapeutic target in amyotrophic lateral sclerosis. Neural Regen Res 2023; 18:2047-2055. [PMID: 36926731 DOI: 10.4103/1673-5374.367929] [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] [Indexed: 01/19/2023] Open
Abstract
Previous studies have indicated that the pathogenesis of amyotrophic lateral sclerosis (ALS) is closely linked to 5-hydroxytryptamine (5-HT). To investigate this further, we administered 5-HT receptor antagonists to SOD1*G93A transgenic (ALS mouse model) and wide-type mice. This involved intraperitoneal injections of either granisetron, piboserod, or ritanserin, which inhibit the 5-HT3, 5-HT4, and 5-HT2 receptors, respectively. The transgenic mice were found to have fewer 5-HT-positive cells in the spinal cord compared with wide-type mice. We found that the administration of granisetron reduced the body weight of the transgenic mice, while piboserod and ritanserin worsened the motor functioning, as assessed using a hanging wire test. However, none of the 5-HT receptor antagonists affected the disease progression. We analyzed the distribution and/or expression of TAR DNA binding protein 43 (TDP-43) and superoxide dismutase 1 G93A (SOD1-G93A), which form abnormal aggregates in ALS. We found that the expression of these proteins increased following the administration of all three 5-HT receptor antagonists. In addition, the disease-related mislocalization of TDP-43 to the cytoplasm increased markedly for all three drugs. In certain anatomical regions, the 5-HT receptor antagonists also led to a marked increase in the number of astrocytes and microglia and a decrease in the number of neurons. These results indicate that 5-HT deficiency may play a role in the pathogenesis of amyotrophic lateral sclerosis by inducing the abnormal expression and/or distribution of TDP-43 and SOD1-G93A and by activating glial cells. 5-HT could therefore be a potential therapeutic target for amyotrophic lateral sclerosis.
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Affiliation(s)
- Shi-Shi Jiang
- Medical College of Nanchang University, Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Clinical College of Nanchang Medical College, Nanchang, Jiangxi Province, China
| | - Meng-Ni Gong
- Department of Neurology, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, China
| | - Wei Rao
- Medical College of Nanchang University, Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Clinical College of Nanchang Medical College, Nanchang, Jiangxi Province, China
| | - Wen Chai
- Medical College of Nanchang University, Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Clinical College of Nanchang Medical College, Nanchang, Jiangxi Province, China
| | - Wen-Zhi Chen
- Medical College of Nanchang University, Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Clinical College of Nanchang Medical College, Nanchang, Jiangxi Province, China
| | - Xiong Zhang
- Department of Neurology, Maoming People's Hospital, Maoming, Guangdong Province, China
| | - Hong-Bing Nie
- Medical College of Nanchang University, Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Clinical College of Nanchang Medical College, Nanchang, Jiangxi Province, China
| | - Ren-Shi Xu
- Medical College of Nanchang University, Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Clinical College of Nanchang Medical College, Nanchang, Jiangxi Province, China
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Tao S, Tan X, Chai W, Peng X, Zheng W, Fu R, Deng M. Knockdown of KLF5 ameliorates renal fibrosis in MRL/lpr mice via inhibition of MX1 transcription. Immun Inflamm Dis 2023; 11:e937. [PMID: 37506140 PMCID: PMC10373570 DOI: 10.1002/iid3.937] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 03/27/2023] [Accepted: 06/21/2023] [Indexed: 07/30/2023] Open
Abstract
OBJECTIVE This study aims to elucidate the role of Kruppel-like factor (KLF5) and myxovirus resistance 1 (MX1) in the progression of renal fibrosis in lupus nephritis (LN). METHODS First, the expression of KLF5 and MX1 was assessed in the peripheral blood of LN patients and healthy participants. Next, the pathological changes in renal tissues were evaluated and compared in BALB/c and MRL/lpr mice, by detecting the expression of fibrosis marker proteins (transforming growth factor-β [TGF-β] and CTGF) and α-SMA, the content of urine protein, and the levels of serum creatinine, blood urea nitrogen, and serum double-stranded DNA antibody. In TGF-β1-induced HK-2 cells, the messenger RNA levels of KLF5 and MX1 were tested by qRT-PCR, and the protein expression of α-SMA, type I collagen (Col I), fibronectin (FN), and matrix metalloproteinase 9 (MMP9) was measured by western blot analysis. Moreover, the relationship between KLF5 and MX1 was predicted and verified. RESULTS In renal tissues of MRL/lpr mice and the peripheral blood of LN patients, KLF5 and MX1 were highly expressed. Pearson analysis revealed that KLF5 was positively correlated with MX1. Furthermore, KLF5 bound to MX1 promoter and promoted its transcription level. MRL/lpr mice showed substantial renal injury, accompanied by increased expression of α-SMA, TGF-β, CTGF, Col I, FN, and MMP9. Injection of sh-KLF5 or sh-MX1 alone in MRL/lpr mice reduced renal fibrosis in LN, while simultaneous injection of sh-KLF5 and ad-MX1 exacerbated renal injury and fibrosis. Furthermore, we obtained the same results in TGF-β1-induced HK-2 cells. CONCLUSION Knockdown of KLF5 alleviated renal fibrosis in LN through repressing the transcription of MX1.
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Affiliation(s)
- Shanshan Tao
- Department of Nephrology, Jiangxi Provincial Children's Hospital, The Affiliated Children's Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Xiao Tan
- Department of Hematology, Jiangxi Provincial Children's Hospital, The Affiliated Children's Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Wen Chai
- Department of Neurology, Jiangxi Provincial People's Hospital, The First Affiliated Hospital of Nanchang Medical College, Nanchang, Jiangxi, China
| | - Xiaojie Peng
- Department of Nephrology, Jiangxi Provincial Children's Hospital, The Affiliated Children's Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Weimin Zheng
- Department of Nephrology, Jiangxi Provincial Children's Hospital, The Affiliated Children's Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Rui Fu
- Department of Nephrology, Jiangxi Provincial Children's Hospital, The Affiliated Children's Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Meihui Deng
- Department of Nephrology, Jiangxi Provincial Children's Hospital, The Affiliated Children's Hospital of Nanchang University, Nanchang, Jiangxi, China
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He P, He B, Li S, Chai W, Rao W, Zhu Y, Chen W, Zhang P, Zhang X, Pan H, Xu R. Distribution Features and Potential Effects of Serotonin in the Cerebrum of SOD1 G93A Transgenic Mice. eNeuro 2022; 9:ENEURO.0001-22.2022. [PMID: 36265904 PMCID: PMC9651208 DOI: 10.1523/eneuro.0001-22.2022] [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] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 09/23/2022] [Accepted: 10/16/2022] [Indexed: 12/24/2022] Open
Abstract
Serotonin (5-HT) participates in the pathogenesis of amyotrophic lateral sclerosis (ALS), but its effects have not been completely clarified. Therefore, we observed the distribution features and potential effects of 5-HT in the cerebrum of G93A SOD1 transgenic (TG) and wild-type (WT) mice by fluorescence immunohistochemistry, Western blotting, ELISA, as well as motor function measurements. Both 5-HT and tryptophan hydroxylase-2 (TPH2) were mainly present in the limbic systems of the cerebrum, such as the glomerular layer of the olfactory bulb, nucleus accumbens, cingulate, fimbria of the hippocampus, mediodorsal thalamic nucleus, habenular nucleus, ventromedial hypothalamus nucleus, lateral hypothalamus area, dorsal raphe nucleus, and piriform cortex. TPH2 and 5-HT were expressed in cell bodies in the dorsal raphe nucleus and piriform cortex, while in other regions they were distributed as filaments and clump shapes in axons. The TPH2 distribution in the cerebrum of TG was significantly lower than that in WT in preset, onset, and progression stages. TPH2 expression in the fimbria of the hippocampus, mediodorsal thalamic nucleus, habenular nucleus, ventromedial hypothalamus nucleus and lateral hypothalamus area was increased in the onset stage and decreased in the progression stage, gradually decreased in the cingulate with disease progression and significantly decreased in the glomerular layer of the olfactory bulb and nucleus accumbens in the onset stage in TG. The number of mammalian achaete-scute homolog-1 in the subventricular zone (SVZ) in TG was significantly lower than that in WT, which was correlated with the TPH2 distribution. Double immunofluorescence staining showed that TPH2, mammalian achaete-scute homolog-1 and 5-HT were mainly expressed in neurons but rarely expressed in microglia or astrocytes in the piriform cortex. The relative fluorescence density of TPH2 in the cingulate region was negatively correlated with the disease severity. Our findings suggest that 5-HT plays a protective role in ALS, likely by regulating neural stem cells in the subventricular zone that might be involved in neuron development in the piriform cortex.
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Affiliation(s)
- Pei He
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Binjun He
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
- Institute of Life Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Shu Li
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Wen Chai
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Wei Rao
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Yu Zhu
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Wenzhi Chen
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Ping Zhang
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
| | - Xiong Zhang
- Department of Neurology, Maoming People's Hospital, Maoming, Guangdong 525000, China
| | - Haili Pan
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
- Institute of Life Science, Nanchang University, Nanchang, Jiangxi 330031, China
| | - Renshi Xu
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, The First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi 330006, China
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Zhang J, Wen A, Chai W, Liang H, Tang C, Gan W, Xu R. Potential proteomic alteration in the brain of Tg(SOD1*G93A)1Gur mice: A new pathogenesis insight of amyotrophic lateral sclerosis. Cell Biol Int 2022; 46:1378-1398. [PMID: 35801511 DOI: 10.1002/cbin.11842] [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: 11/05/2021] [Accepted: 02/22/2022] [Indexed: 11/09/2022]
Abstract
The pathogenesis of amyotrophic lateral sclerosis (ALS) remains unclear. The recent studies have suggested that the protein abnormalities could play some important roles in ALS because several protein mutations were found in individuals with this disease. However, proteins that are currently known to be associated with ALS only explain the pathogenesis of this disease in a minority of cases, thus, further screening is needed to identify other ALS-related proteins. In this study, we systematically analyzed and compared the brain proteomic alterations between a mouse model of ALS, the Tg(SOD1*G93A)1Gur model, and wild-type mice using isobaric tags for relative and absolute quantitation (iTRAQ) as well as bioinformatics methods. The results revealed some significant up- and downregulated proteins at the different developmental stages in the ALS-like mice as well as the possibly related cellular components, molecular functions, biological processes, and pathways in the development of ALS. Our results identified some possible proteins that participate in the pathogenesis of ALS as well as the cellular components that are damaged by these proteins, we additionally identified the molecular functions, the biological processes, and the pathways of these proteins as well as the molecules that are associated with these pathways. This study represents an important preliminary investigation of the role of proteomic abnormalities in the pathogenesis of ALS, both in human patients and other animal models. We present some novel findings that may serve as a basis for further investigation of abnormal proteins that are involved in the pathogenesis of ALS.
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Affiliation(s)
- Jie Zhang
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - An Wen
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Wen Chai
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Huiting Liang
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Chunyan Tang
- Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Weiming Gan
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China
| | - Renshi Xu
- Department of Neurology, First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi, China.,Department of Neurology, Jiangxi Provincial People's Hospital, Clinical College of Nanchang Medical College, First Affiliated Hospital of Nanchang Medical College, Affiliated People's Hospital of Nanchang University, Nanchang, Jiangxi, China
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10
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Maimaiti Z, Xu C, Fu J, Li Z, Hao LB, Chai W, Chen JY. [Characteristics of the immune microenvironment and related treatment strategies in patients with periprosthetic joint infection]. Zhonghua Wai Ke Za Zhi 2022; 60:796-800. [PMID: 35790534 DOI: 10.3760/cma.j.cn112139-20220107-00014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Periprosthetic joint infection (PJI) involves complex immunomodulatory interactions between pathogens,biomaterials,and hosts,and correlates with alterations in the ratio of immune cells as well as in the concentration of immune checkpoint molecules.Prosthesis,biofilm,microorganisms,and host constitute a special and complex immune microenvironment.Fully studying the characteristics of immune microenvironment and potential targets of immunotherapy in orthopedic implant-associated infections are expected to provide a new direction for clinical treatment of PJI. An overview of the literature related to PJI and immune regulation at domestic and international sites was conducted to summarize and analyze the characteristics of the immune microenvironment and the potential value of related immunotherapy, aiming to provide new insights for the targeted treatment of PJI.
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Affiliation(s)
- Zulipikaer Maimaiti
- Department of Orthopaedics,the Fourth Medical Centre,Chinese People's Liberation Army General Hospital,Beijing 100048,China
| | - C Xu
- Department of Orthopaedics,the Fourth Medical Centre,Chinese People's Liberation Army General Hospital,Beijing 100048,China
| | - J Fu
- Department of Orthopaedics,the Fourth Medical Centre,Chinese People's Liberation Army General Hospital,Beijing 100048,China
| | - Z Li
- Medical School of Nankai University,Tianjin 300074,China
| | - L B Hao
- Department of Orthopaedics,the Fourth Medical Centre,Chinese People's Liberation Army General Hospital,Beijing 100048,China
| | - W Chai
- Department of Orthopaedics,the Fourth Medical Centre,Chinese People's Liberation Army General Hospital,Beijing 100048,China
| | - J Y Chen
- Department of Orthopaedics,the Fourth Medical Centre,Chinese People's Liberation Army General Hospital,Beijing 100048,China
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11
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Chai W, Zhang J, Xiang Z, Zhang H, Mei Z, Nie H, Xu R, Zhang P. Potential of nobiletin against Alzheimer's disease through inhibiting neuroinflammation. Metab Brain Dis 2022; 37:1145-1154. [PMID: 35267136 DOI: 10.1007/s11011-022-00932-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 02/07/2022] [Indexed: 12/31/2022]
Abstract
OBJECTIVE This study aimed to explore the mechanism of Nobiletin attenuating Alzheimer's disease (AD) by inhibiting neuroinflammation. METHODS The expression of inflammatory cytokines and HMGB-1 in serum of AD patients were examined. Microglia (MGs) were treated with different doses of Nobiletin before LPS and Nigericin induction. Cell viability and apoptosis were determined by CCK-8 and TUNEL assays, respectively. APP/PS1 mice were gavaged with Nobiletin, and Morris water maze (MWM) was established to record swimming speed, escape latency, the number of platform crossings, and time spent in the platform quadrant. MGs activation in brain tissues was evaluated by immunofluorescence. The expression of pyroptosis-related proteins, inflammatory cytokines, and HMGB-1 was determined in the hippocampus and MGs. RESULTS The levels of inflammatory cytokines and HMGB-1 were high in serum of AD patients. Treatment with different concentrations of Nobiletin prominently enhanced cell viability and reduced apoptosis and the expression of inflammatory cytokine and pyroptosis-related proteins in LPS + Nigericin-induced MGs. Gavage of different doses of Nobiletin into APP/PS1 mice shortened the escape latency in mice, diminished MGs activation in brain tissues, and remarkably elevated the number of platform crossings and the time spent in the platform quadrant without obvious change in swimming speed, suggesting that Nobiletin improved the spatial learning and memory abilities in APP/PS1 mice. The expression of pyroptosis-related proteins, HMGB-1, and inflammatory cytokines was decreased dramatically by Nobiletin in the hippocampus of APP/PS1 mice. CONCLUSIONS Nobiletin can inhibit neuroinflammation by inhibiting HMGB-1, pyroptosis-related proteins, and inflammatory cytokines, thus mitigating AD.
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Affiliation(s)
- Wen Chai
- Department of Neurology, The First Affiliated Hospital of Nanchang Medical College/Jaingxi Provincial People's Hospital, No.152, Aiguo Road, 330006, Nanchang, Jiangxi, P.R. China
| | - Ji Zhang
- Department of Neurology, The First Affiliated Hospital of Nanchang Medical College/Jaingxi Provincial People's Hospital, No.152, Aiguo Road, 330006, Nanchang, Jiangxi, P.R. China
| | - Zhengbing Xiang
- Department of Neurology, The First Affiliated Hospital of Nanchang Medical College/Jaingxi Provincial People's Hospital, No.152, Aiguo Road, 330006, Nanchang, Jiangxi, P.R. China
| | - Honglian Zhang
- Department of Neurology, The First Affiliated Hospital of Nanchang Medical College/Jaingxi Provincial People's Hospital, No.152, Aiguo Road, 330006, Nanchang, Jiangxi, P.R. China
| | - Zhujun Mei
- Department of Neurology, The First Affiliated Hospital of Nanchang Medical College/Jaingxi Provincial People's Hospital, No.152, Aiguo Road, 330006, Nanchang, Jiangxi, P.R. China
| | - Hongbing Nie
- Department of Neurology, The First Affiliated Hospital of Nanchang Medical College/Jaingxi Provincial People's Hospital, No.152, Aiguo Road, 330006, Nanchang, Jiangxi, P.R. China
| | - Renxu Xu
- Department of Neurology, The First Affiliated Hospital of Nanchang Medical College/Jaingxi Provincial People's Hospital, No.152, Aiguo Road, 330006, Nanchang, Jiangxi, P.R. China
- Department of General Practice/General Family Medicine, The First Affiliated Hospital of Nanchang Medical College/Jaingxi Provincial People's Hospital, 330006, Nanchang, Jiangxi, P.R. China
| | - Ping Zhang
- Department of Neurology, The First Affiliated Hospital of Nanchang Medical College/Jaingxi Provincial People's Hospital, No.152, Aiguo Road, 330006, Nanchang, Jiangxi, P.R. China.
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Zhang J, Chai W, Xiang Z, Zhou X, Zhang P. MZF1 alleviates oxidative stress and apoptosis induced by rotenone in SH-SY5Y cells by promoting RBM3 transcription. J Toxicol Sci 2021; 46:477-486. [PMID: 34602532 DOI: 10.2131/jts.46.477] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
OBJECTIVE To investigate the protective effect of MZF1/RBM3 on rotenone-induced neuronal injury. METHODS Rotenone (1 μM) was used to treat SH-SY5Y cells for 24 hr to simulate the cellular model of Parkinson's disease (PD), followed by detection of SH-SY5Y cell activities using MTT assay. MZF1 expression in rotenone-treated SH-SY5Y cells was detected by qRT-PCR and Western blot. MZF1 overexpression plasmid or MZF1 overexpression plasmid and RBM3 siRNA was transfected into SH-SY5Y cells, and then the expressions of MZF1 and RBM3 were detected. Oxidative stress (OS) in SH-SY5Y cells was detected using CMH2DCF-DA probes. Cell apoptosis rate was detected by flow cytometry. CHIP assay and dual-luciferase reporter assay were used to detect the binding between MZF1 and RBM3 promoter. RESULTS The expression of MZF1 was significantly lower in the rotenone-induced SH-SY5Y cells. Overexpression of MZF1 significantly reduced OS and apoptosis in rotenone-induced SH-SY5Y cells. MZF1 was a transcription factor of RBM3, which promoted the transcription of RBM3, and knockdown of RBM3 inhibited the protective effect of MZF1 overexpression on SH-SY5Y cells. CONCLUSION MZF1 alleviates OS and apoptosis induced by rotenone in SH-SY5Y cells by promoting RBM3 transcription.
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Affiliation(s)
- Ji Zhang
- Department of Neurology, Jiangxi Provincial People's Hospital, China
| | - Wen Chai
- Department of Neurology, Jiangxi Provincial People's Hospital, China
| | - Zhengbing Xiang
- Department of Neurology, Jiangxi Provincial People's Hospital, China
| | - Xinhua Zhou
- Department of Neurology, Jiangxi Provincial People's Hospital, China
| | - Ping Zhang
- Department of Neurology, Jiangxi Provincial People's Hospital, China
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Huang R, Ding X, Cao X, Chen L, Chai W, Chen X. Type 1 narcolepsy without cataplexy and treatment progress: a case report. Ann Palliat Med 2021; 10:3491-3494. [PMID: 33849131 DOI: 10.21037/apm-21-220] [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] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/20/2021] [Indexed: 11/06/2022]
Abstract
Narcolepsy is a sleep disorder with the main manifestations of excessive daytime sleepiness, cataplexy, sleep paralysis, sleep hallucinations, and nighttime sleep disturbance. It is still not fully recognized by clinicians, and many patients are often misdiagnosed with epilepsy, syncope, or mental disorders. In the present study, we report the first case of narcolepsy diagnosed at the district, with a complete medical history, objective examinations, and cerebrospinal fluid and hematological tests, but no cataplexy. Mutiple sleep latentcy test (MSLT) showed that the average sleep latency was 3.1 min, and abnormal REM sleep episodes were detected in 4 naps. The average REM latency was 1.3 min. We review the knowledge and researches on this disease in Mainland China in the past 10 years. Data from China in 2014 showed a significant increase in the incidence of narcolepsy in 2011 after the H1N1 epidemic in China in 2009. Despite the low incidence rate, diagnosis of narcolepsy is still confusing and needs clinicians' attention. Whether the incidence of narcolepsy may increase after covid19 remains to be observed. So far, there is no clear evidence to support immunotherapy. In conclusion, further studies are needed to verify more treatments and improve the patient's life quality.
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Affiliation(s)
- Ruolan Huang
- Department of Neurology, Shenzhen University General Hospital, Shenzhen University Clinical Research Center for Neurological Diseases, Shenzhen, China.
| | - Xueying Ding
- Department of Neurology, Shenzhen University General Hospital, Shenzhen University Clinical Research Center for Neurological Diseases, Shenzhen, China
| | - Xu Cao
- Department of Neurology, Shenzhen University General Hospital, Shenzhen University Clinical Research Center for Neurological Diseases, Shenzhen, China
| | - Liming Chen
- Department of Neurology, Shenzhen University General Hospital, Shenzhen University Clinical Research Center for Neurological Diseases, Shenzhen, China
| | - Wen Chai
- Department of Neurology, Shenzhen University General Hospital, Shenzhen University Clinical Research Center for Neurological Diseases, Shenzhen, China
| | - Xiaowu Chen
- Department of Neurology, Shenzhen University General Hospital, Shenzhen University Clinical Research Center for Neurological Diseases, Shenzhen, China
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Li S, Qiao Y, Xu Y, Li P, Nie J, Zhao Q, Chai W, Shi Y, Kong W, Shan Y. Identification of Linear Peptide Immunogens with Verified Broad-spectrum Immunogenicity from the Conserved Regions within the Hemagglutinin Stem Domain of H1N1 Influenza Virus. Immunol Invest 2020; 51:411-424. [PMID: 33078652 DOI: 10.1080/08820139.2020.1834579] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Background: Influenza A viruses (IAVs) induce acute respiratory disease and cause severe epidemics and pandemics. Since IAVs exhibit antigenic variation and genome reassortment, the development of broad-spectrum influenza vaccines is crucial. The stem of the hemagglutinin (HA) is highly conserved across IAV strains and thus has been explored in broad-spectrum influenza vaccine studies. The present study aimed to identify viral epitopes capable of eliciting effective host immune responses, which can be explored for the development of broad-spectrum non-strain specific prophylactic options against IAV.Methods: In this study, a series of conserved linear sequences from the HA stem of IAV (H1N1) was recognized by sequence alignment and B/T-cell epitope prediction after being chemically coupled to the Keyhole Limpet Hemocyanin (KLH) protein. The predicted linear epitopes were identified by enzyme-linked immunosorbent assay (ELISA) after animal immunization and then fused with ferritin carriers.Results: Three predicted linear epitopes with relatively strong immunogenicity, P3, P6 and P8 were fused with ferritin carriers P3F, P6F and P8F, respectively to further improve their immunogenicity. Antibody titre of the sera of mice immunized with the recombinant immunogens revealed the elicitation of specific antibody-binding activities by the identified sequences. While hemagglutinin-inhibition activities were not detected in the antisera, neutralizing antibodies against the H1 and H3 virus subtypes were detected by the microneutralization assay.Conclusion: The linear epitopes fused with ferritin identified in this study can lay the foundation for future advancements in development of broad-spectrum subunit vaccine against IAV (H1N1), and give rise to the potential future applicability of ferritin-based antigen delivery nanoplatforms.
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Affiliation(s)
- Shuang Li
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Yongbo Qiao
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Yan Xu
- Laboratory of Molecular Immunology, State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
| | - Pengju Li
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Jiaojiao Nie
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Qi Zhao
- Cancer Centre, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Taipa, China
| | - Wen Chai
- Changchun Institute of Biological Products Co., Ltd, Changchun, Jilin, China
| | - Yuhua Shi
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Wei Kong
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China.,Key Laboratory for Molecular Enzymology and Engineering, the Ministry of Education, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Yaming Shan
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China.,Cancer Centre, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Taipa, China.,Key Laboratory for Molecular Enzymology and Engineering, the Ministry of Education, School of Life Sciences, Jilin University, Changchun, Jilin, China
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Li DP, Chai W, Liu YH, Xu TT, Huang H. MicroRNA-142 promotes the development of nasopharyngeal carcinoma through targeting PTEN. Eur Rev Med Pharmacol Sci 2020; 23:3806-3812. [PMID: 31115007 DOI: 10.26355/eurrev_201905_17807] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To elucidate whether microRNA-142 could regulate the development of nasopharyngeal carcinoma (NPC) by mediating gene of phosphate and tension homology deleted on chromosome ten (PTEN) expression. PATIENTS AND METHODS The microRNA-142 expression in NPC tissues and paracancerous tissues was detected by the quantitative Real Time-Polymerase Chain Reaction (qRT-PCR). Correlation between the microRNA-142 expression and the prognosis of NPC patients was analyzed. MicroRNA-142 expression in NPC cell lines was determined as well. By transfection of microRNA-142 inhibitor or negative control, biological performances of NPC cells were accessed through cell counting kit-8 (CCK-8), colony formation, wound healing, and transwell assay. Dual-luciferase reporter gene assay was conducted to verify the binding condition between microRNA-142 and its target gene PTEN. Rescue experiments were carried out by co-transfection of microRNA-142 inhibitor and si-PTEN, followed by detecting the invasive capacity of NPC cells. Protein expressions of relative genes in the PI3K/AKT pathway after the microRNA-142 knockdown in NPC cells were determined by Western blot. RESULTS MicroRNA-142 was highly expressed in NPC tissues than that of paracancerous tissues, which was correlated with poor prognosis of NPC patients. MicroRNA-142 was also highly expressed in NPC cells. Downregulated microRNA-142 inhibited proliferative, migratory, and invasive capacities of NPC cells. Dual-luciferase reporter gene assay verified that microRNA-142 could directly bind to PTEN. Knockdown of PTEN could reverse the inhibitory effect of microRNA-142 on invasive capacity of NPC cells. Finally, Western blot results demonstrated that the microRNA-142 knockdown inhibited the PI3K/AKT pathway in NPC cells. CONCLUSIONS MicroRNA-142 is highly expressed in NPC. MicroRNA-142 enhances the proliferative and invasive capacities of NPC cells by inhibiting PTEN expression, thus promoting NPC development.
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Affiliation(s)
- D-P Li
- Department of Otorhinolaryngology Head and Neck Surgery, The People's Hospital of Bozhou; Bozhou Clinical Medicine College of Anhui Medical University; Affiliated Bozhou Hospital of Anhui University of Science and Technology, Bozhou, China
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Wu J, Yan F, Chai W, Fu C, Yan X, Zhan Y, Sun K. Breast cancer recurrence risk prediction using whole-lesion histogram analysis with diffusion kurtosis imaging. Clin Radiol 2020; 75:239.e1-239.e8. [DOI: 10.1016/j.crad.2019.10.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Accepted: 10/21/2019] [Indexed: 12/16/2022]
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17
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Horiuchi CA, Fukushima T, Furuta N, Chai W, Ji SJ, Saito Y, Hashimoto C, Takahashi TT, Sugiyama T, Muto A, Sakata Y, Nozaki S. Esterification of Alkene with Cerium(IV) Sulfate in Carboxylic Acid. Journal of Chemical Research 2019. [DOI: 10.3184/030823403103173769] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Reaction of alkenes [cyclohexene (1), cycloheptene (2), cyclooctene (3), 1-heptene (4), 1-octene (5), styrene (6), 1,7-octadiene (7), indene (8), and 1,2-dihydronaphthalene (9)] with cerium(IV) sulfate (CS) in carboxylic acids [formic acid, acetic acid, and propionic acid] readily yielded the corresponding carboxylic esters. This addition reaction follows the Markovnikov rule. This reaction provides a new simple method for preparing carboxylic esters from alkenes. It was also found that this method is useful for formylation.
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Affiliation(s)
- C. Akira Horiuchi
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Tomoaki Fukushima
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Noriyuki Furuta
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Wen Chai
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Shun-Jun Ji
- Department of Chemistry, Suzhou University, 1 Shizi St. Suzhou, Jiangsu 215006, P. R. China
| | - Yoshikazu Saito
- Department of Chemistry, Rikkyo (St. Paul's) University, Nishi-Ikebukuro, Toshima-Ku, Tokyo 171-8501, Japan
| | - Chikao Hashimoto
- Department of Chemistry, Jikei University, School of Medicine, Kokuryo-cho, Chofu-shi, Tokyo 182-8570, Japan
| | - T. Tomoyoshi Takahashi
- Department of Chemistry, Jikei University, School of Medicine, Kokuryo-cho, Chofu-shi, Tokyo 182-8570, Japan
| | - Takashi Sugiyama
- Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Akinori Muto
- Department of Applied Chemistry, Okayama University, Faculty of Engineering, Tsushima Naka, Okayama City, Okayama 700-8530, Japan
| | - Yusaku Sakata
- Department of Applied Chemistry, Okayama University, Faculty of Engineering, Tsushima Naka, Okayama City, Okayama 700-8530, Japan
| | - Sukekatsu Nozaki
- Faculty of Pharmaceutical Science, Josai University, Sakado, Saitama 350-0295, Japan
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Chai W, Zou G, Shi J, Chen W, Gong X, Wei X, Ling L. 7.4-O6Evaluation of the effectiveness of a WHO-5A’s model based comprehensive tobacco control program among migrant workers in Guangdong, China: a pilot study. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky047.259] [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)
- W Chai
- Sun Yat-sen University, China
| | - G Zou
- Sun Yat-sen University, China
| | - J Shi
- Sun Yat-sen University, China
| | - W Chen
- Sun Yat-sen University, China
| | - X Gong
- Sun Yat-sen University, China
| | - X Wei
- University of Toronto, Canada
| | - L Ling
- Sun Yat-sen University, China
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Xu Q, Mi J, Cao W, Chai W. The impact of microbleeds on early cognitive impairment in cerebral small vessel disease. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3167] [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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Li DP, He M, Chai W, Huang H. [The relationship between incidence of secretory otitis media and passive smoking in children]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2017; 31:1211-1213. [PMID: 29798362 DOI: 10.13201/j.issn.1001-1781.2017.15.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Indexed: 06/08/2023]
Abstract
Children with secretory otitis media are often the result of multiple factors. Recent epidemiological studies on its incidence have mentioned the effects of passive smoking on its incidence. This article explores the potential links between the two by summarizing relevant literatures.
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Han Y, Chen J, Cai G, Cheng X, Kirova Y, Chai W. PO-1003: A analysis of safety of whole brain radiotherapy with Hippocampus avoidance in brain metastasis. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31439-1] [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]
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Fu R, Yang Y, Feng W, Ge Q, Feng Y, Zeng X, Chai W, Yi J, Yuan R. An efficient, eco-friendly and sustainable tandem oxidative amidation of alcohols with amines catalyzed by heteropolyanion-based ionic liquids via a bifunctional catalysis process. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.11.002] [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: 11/30/2022]
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Yuan Y, Zhang GQ, Chai W, Ni M, Xu C, Chen JY. Silencing of microRNA-138-5p promotes IL-1β-induced cartilage degradation in human chondrocytes by targeting FOXC1: miR-138 promotes cartilage degradation. Bone Joint Res 2016; 5:523-530. [PMID: 27799147 PMCID: PMC5108353 DOI: 10.1302/2046-3758.510.bjr-2016-0074.r2] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 08/08/2016] [Indexed: 12/03/2022] Open
Abstract
Objectives Osteoarthritis (OA) is characterised by articular cartilage degradation. MicroRNAs (miRNAs) have been identified in the development of OA. The purpose of our study was to explore the functional role and underlying mechanism of miR-138-5p in interleukin-1 beta (IL-1β)-induced extracellular matrix (ECM) degradation of OA cartilage. Materials and Methods Human articular cartilage was obtained from patients with and without OA, and chondrocytes were isolated and stimulated by IL-1β. The expression levels of miR-138-5p in cartilage and chondrocytes were both determined. After transfection with miR-138-5p mimics, allele-specific oligonucleotide (ASO)-miR-138-5p, or their negative controls, the messenger RNA (mRNA) levels of aggrecan (ACAN), collagen type II and alpha 1 (COL2A1), the protein levels of glycosaminoglycans (GAGs), and both the mRNA and protein levels of matrix metalloproteinase (MMP)-13 were evaluated. Luciferase reporter assay, quantitative real-time polymerase chain reaction (qRT-PCR), and Western blot were performed to explore whether Forkhead Box C1 (FOCX1) was a target of miR-138-5p. Further, we co-transfected OA chondrocytes with miR-138-5p mimics and pcDNA3.1 (+)-FOXC1 and then stimulated with IL-1β to determine whether miR-138-5p-mediated IL-1β-induced cartilage matrix degradation resulted from targeting FOXC1. Results MiR-138-5p was significantly increased in OA cartilage and in chondrocytes in response to IL-1β-stimulation. Overexpression of miR-138-5p significantly increased the IL-1β-induced downregulation of COL2A1, ACAN, and GAGs, and increased the IL-1β-induced over expression of MMP-13.We found that FOXC1 is directly regulated by miR-138-5p. Additionally, co-transfection with miR-138-5p mimics and pcDNA3.1 (+)-FOXC1 resulted in higher levels of COL2A1, ACAN, and GAGs, but lower levels of MMP-13. Conclusion miR-138-5p promotes IL-1β-induced cartilage degradation in human chondrocytes, possibly by targeting FOXC1. Cite this article: Y. Yuan, G. Q. Zhang, W. Chai,M. Ni, C. Xu, J. Y. Chen. Silencing of microRNA-138-5p promotes IL-1β-induced cartilage degradation in human chondrocytes by targeting FOXC1: miR-138 promotes cartilage degradation. Bone Joint Res 2016;5:523–530. DOI: 10.1302/2046-3758.510.BJR-2016-0074.R2.
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Affiliation(s)
- Y Yuan
- Department of Orthopaedics, Chinese PLA General Hospital, No.28 Fuxing Road,Haidian District,Beijing 100853,China and, Jinan Military General Hospital, No.25, Shifan Road, Tianqiao District, Jinan 250031, Shandong, China
| | - G Q Zhang
- Department of Orthopaedics, Chinese PLA General Hospital, General Hospital, No.28 Fuxing Road, Haidian District, Beijing 100853, China
| | - W Chai
- Department of Orthopaedics, Chinese PLA General Hospital, General Hospital, No.28 Fuxing Road, Haidian District, Beijing 100853, China
| | - M Ni
- Department of Orthopaedics, Chinese PLA General Hospital, General Hospital, No.28 Fuxing Road, Haidian District, Beijing 100853, China
| | - C Xu
- Department of Orthopaedics, Chinese PLA General Hospital, General Hospital, No.28 Fuxing Road, Haidian District, Beijing 100853, China
| | - J Y Chen
- Department of Orthopaedics, Chinese PLA General Hospital, General Hospital, No.28 Fuxing Road, Haidian District, Beijing 100853, China
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Li DP, Huang H, Chai W, He M, Deng J, Zhang HL, Guo R. [Analysis of association of human 8-oxoguanine giycosylase 1 polymorphism with the susceptibility of laryngeal cancer]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 51:681-684. [PMID: 27666707 DOI: 10.3760/cma.j.issn.1673-0860.2016.09.009] [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: 11/05/2022]
Abstract
Objective: To study the association between human 8-oxoguanine giycosylase 1 (hOGG1) gene polymorphisms and the risk of laryngeal carcinoma. Methods: A total of 86 patients with laryngeal carcinoma treated in The Air Force General Hospital and the Bozhou People's Hospital of Anhui Province from Jan 2010 to Dec 2014 were included in experimental group, and 86 healthy adults were selected as control group. The hOGG1 gene polymorphisms of subjects in two group were detected with by polymerase chain reaction amplification and gene sequencing technology, the differences in hOGG1 gene polymorphisms between two groups were analyzed. Results: The frequencies of hOGG1 gene heterozygous type (Ser/Cys) and mutant type (Cys/Cys) in experimental group were higher than those in control group(P<0.05). Compared to individuals with hOGG1 gene Ser/Ser, individuals with hOGG1 gene Ser/Cys had a 2.97-fold increased risk of laryngeal carcinoma, and individuals with hOGG1 gene Cys/Cys had a 8.09-fold increased risk of laryngeal carcinoma. Stratified by smoking or not, it was found that the proportion of heterozygous type or mutant type in smokers was higher significantly than non-smokers (P<0.05). Conclusion: Individuals with hOGG1 gene heterozygous type (Ser/Cys) or mutant type (Cys/Cys) have a higher risk of laryngeal carcinoma, with interaction between these gene types and smoking, and the gene types could be used as predictors for the occurrence of laryngeal carcinoma.
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Affiliation(s)
- D P Li
- Department of Otorhinolaryngology Head and Neck Surgery, Bozhou People's Hospital, Bozhou 236800, China
| | - H Huang
- Department of Otorhinolaryngology Head and Neck Surgery, Bozhou People's Hospital, Bozhou 236800, China
| | - W Chai
- Department of Otorhinolaryngology Head and Neck Surgery, Bozhou People's Hospital, Bozhou 236800, China
| | - M He
- Department of Otorhinolaryngology Head and Neck Surgery, Bozhou People's Hospital, Bozhou 236800, China
| | - J Deng
- Department of Otorhinolaryngology Head and Neck Surgery, the Air Force General Hospital, Beijing 100142, China
| | - H L Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Affiliated Hospital of Air Force Institute of aviation medicine, Beijing 100089, China
| | - R Guo
- Department of Otorhinolaryngology Head and Neck Surgery, the Air Force General Hospital, Beijing 100142, China
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Zhou L, Kuang Y, Chai W. The competent function of granulosa cells during PPOS in normalovulatory women undergoing IVF/ICSI treatments. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.570] [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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27
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Huang H, Zhou ML, Li DP, Chai W, Pan R, Niu HZ, He M, Ji QJ, Jiang JS, Ding W. [The influence on the peeling off time of the tunica albuginea after 4-8℃ cool water was applied to children's low temperature plasma-assisted tonsillectomy]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1224-1226. [PMID: 29798334 DOI: 10.13201/j.issn.1001-1781.2016.15.011] [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] [Received: 11/22/2015] [Indexed: 11/12/2022]
Abstract
Objective:The aim of this study is to discuss the influence on the peeling off time of the tunica albuginea after 4-8℃ cool water was applied to children 's low temperature plasmaassisted tonsillectomy.Method:One hundred and seventeen benign hypertrophy of tonsil patients were recruited,the 56 cases of them were served as experimental group,who were treated with plasma tonsillectomy using 4-8℃ normal saline as medium,while the 61 cases were served as control group,who were treated with plasma tonsillectomy using 22-25℃ normal saline as medium.Then,we analyzed the peeling off time of the tunica albuginea between experimental and control group.Result:The difference of formation time between experimental group and control group was not statistically significant(P >0.05).The average peeling off time of the tunica albuginea was (11.32±2.51) days in experimental group,while time was(15.03±4.12) days in control group.There was a statistical difference between them.Conclusion:The use of 4-8℃ cold water in children's low temperature plasma-assisted tonsillectomy can reduce the peeling off time of the tunica albuginea,and it indicate that the ice water medium can reduce the heat injury caused by the plasma operation.
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Affiliation(s)
- H Huang
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - M L Zhou
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - D P Li
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - W Chai
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - R Pan
- Operation Room,People's Hospital of Bozhou
| | - H Z Niu
- Operation Room,People's Hospital of Bozhou
| | - M He
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - Q J Ji
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - J S Jiang
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
| | - W Ding
- Department of Otolaryngology Head and Neck Surgery,People's Hospital of Bozhou,Bozhou,236800,China
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He M, Jiang JS, Huang H, Chai W, Li DP. [The clinical study of the treatment of auricular pseudocyst with Suture following by pressure dressing]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1150-1152. [PMID: 29798444 DOI: 10.13201/j.issn.1001-1781.2016.14.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Indexed: 11/12/2022]
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29
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Li DP, Chai W, Huang H. [The diagnosis and treatment progress of vocal fold leukoplakia]. Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:838-840. [PMID: 29798071 DOI: 10.13201/j.issn.1001-1781.2016.10.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Indexed: 06/08/2023]
Abstract
Vocal fold leukoplakia is a descriptive diagnosis, and can be divided into simple hyperplasia, precancerous lesions(with atypical hyperplasia) and invasive carcinoma according to pathological types. Because of a close relationship with the laryngeal carcinoma, knowing the risk factors and treatment methods of vocal fold leukoplakia has grate significance in preventing the malignant change and recurrence. This paper summarizes the recent progress in clinical diagnosis and treatment of vocal cord leukoplakia, mainly including risk factors, means of examination, treatment and prognosis.
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Fu R, Yang Y, Jin W, Gu H, Zeng X, Chai W, Ma Y, Wang Q, Yi J, Yuan R. Microwave-assisted heteropolyanion-based ionic liquid promoted sustainable protocol to N-heteroaryl amides via N-directing dual catalyzed oxidative amidation of aldehydes. RSC Adv 2016. [DOI: 10.1039/c6ra20961k] [Citation(s) in RCA: 12] [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: 11/21/2022] Open
Abstract
A procedure for the synthesis of N-heteroaryl amides directly from oxidative amidation of aldehydes catalyzed by heteropolyanion-based ionic liquids has been reported. The proposed N-directing dual-catalysis mechanism was briefly investigated.
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31
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Nepper M, Chai W. Exploring Parent’s Perceptions of Healthy Eating in the Home Food Environment of Children, Ages 6-12 Years: A Qualitative Study. J Acad Nutr Diet 2015. [DOI: 10.1016/j.jand.2015.06.338] [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: 10/23/2022]
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32
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Fu R, Yang Y, Lai W, Ma Y, Chen Z, Zhou J, Chai W, Wang Q, Yuan R. Efficient and Green Microwave-Assisted Multicomponent Biginelli Reaction for the Synthesis of Dihydropyrimidinones Catalyzed by Heteropolyanion-Based Ionic Liquids Under Solvent-Free Conditions. SYNTHETIC COMMUN 2014. [DOI: 10.1080/00397911.2014.976346] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Renzhong Fu
- Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
| | - Yang Yang
- Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
| | - Wenchen Lai
- Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
| | - Yongfeng Ma
- Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
| | - Zhikai Chen
- Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
| | - Jian Zhou
- Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
| | - Wen Chai
- Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
| | - Quan Wang
- Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
| | - Rongxin Yuan
- Jiangsu Laboratory of Advanced Functional Material, School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu, Jiangsu, China
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Wang Q, Geng H, Chai W, Zeng X, Xu M, Zhu C, Fu R, Yuan R. Copper-Catalyzed Formation of C-O Bonds by Oxidative Coupling of Benzylic Alcohols with Ethers. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402885] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang Q, Zheng H, Chai W, Chen D, Zeng X, Fu R, Yuan R. Copper catalyzed C-O bond formation via oxidative cross-coupling reaction of aldehydes and ethers. Org Biomol Chem 2014; 12:6549-53. [PMID: 25033411 DOI: 10.1039/c4ob00862f] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A practical and efficient construction of C-O bonds via oxidative cross-coupling reaction of aldehydes and ethers has been realized under open air. When 2 mol% copper was used as the catalyst, various α-acyloxy ethers were obtained with up to 93% isolated yield.
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Affiliation(s)
- Quan Wang
- School of Chemistry and Materials Engineering, Jiangsu Key Laboratory of Advanced Functional Materials, Changshu Institute of Technology, 99 South 3rd Ring, Changshu, 215500, P. R. China.
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35
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Chai W, Chen Q, Yan Z, Xue S, Lyu Q, Kuang Y. Clinical outcomes of day7 vitrified-thawed blastocyst transfer in patients with slow development of embryos. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.774] [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: 10/24/2022]
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36
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Wang Q, Feng J, Chai W, Geng H, Xu M, Wang K, Xu C, Fu R, Yuan R. Bu4NI-catalyzed construction of CO bonds by oxidative coupling of alcohols with ethers. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.06.103] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [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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37
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Chen Z, Fu R, Chai W, Zheng H, Sun L, Lu Q, Yuan R. An eco-benign and highly efficient procedure for N-acylation catalyzed by heteropolyanion-based ionic liquids using carboxylic acid under solvent-free conditions. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.02.042] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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38
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Chung L, Onyango D, Guo Z, Jia P, Dai H, Liu S, Zhou M, Lin W, Pang I, Li H, Yuan YC, Huang Q, Zheng L, Lopes J, Nicolas A, Chai W, Raz D, Reckamp KL, Shen B. The FEN1 E359K germline mutation disrupts the FEN1-WRN interaction and FEN1 GEN activity, causing aneuploidy-associated cancers. Oncogene 2014; 34:902-11. [PMID: 24608430 PMCID: PMC4160428 DOI: 10.1038/onc.2014.19] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [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: 08/22/2013] [Revised: 11/18/2013] [Accepted: 12/20/2013] [Indexed: 02/02/2023]
Abstract
Polymorphisms and somatic mutations in Flap Endonuclease 1 (FEN1), an essential enzyme involved in DNA replication and repair, can lead to functional deficiencies of the FEN1 protein and a predisposition to cancer. We identified a FEN1 germline mutation which changed residue E359 to K in a patient whose family had a history of breast cancer. We determined that the E359K mutation, which is in the protein-protein domain of FEN1, abolished the interaction of FEN1 with Werner Syndrome protein (WRN), an interaction which is critical for resolving stalled DNA replication forks. Furthermore, although the flap endonuclease activity of FEN1 E359K was unaffected, it failed to resolve bubble structures, which requires the FEN1 gap dependent endonuclease (GEN) activity. To determine the etiological significance of E359K, we established a mouse model containing this mutation. E359K mouse embryonic fibroblasts (MEF) were more sensitive to DNA cross-linking agents that cause replication forks to stall. Cytological analysis suggested that the FEN1-WRN interaction was also required to for telomere stability; mutant cell lines had fragile telomeres, increased numbers of spontaneous chromosomal anomalies and higher frequencies of transformation. Moreover, the incidence of cancer was significantly higher in mice homozygous for FEN1 E359K than in wild-type mice, suggesting that the FEN1 E359K mutation is oncogenic.
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Affiliation(s)
- L Chung
- Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - D Onyango
- Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - Z Guo
- 1] Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA [2] Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, China
| | - P Jia
- WWAMI Medical Education Program, School of Molecular Biosciences, Washington State University, Spokane, WA, USA
| | - H Dai
- Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - S Liu
- 1] Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA [2] College of Life Science, Zhejiang University, Hangzhou, Zhejiang 310058, China
| | - M Zhou
- Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - W Lin
- Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - I Pang
- Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - H Li
- Department of Molecular Medicine, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - Y-C Yuan
- Department of Molecular Medicine, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - Q Huang
- Department of Pathology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - L Zheng
- Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - J Lopes
- 1] Section de Recherche, Institut Curie, CNRS UMR3244, Paris, France [2] Muséum National d'Histoire Naturelle, USM 503, INSERM U565, UMR7196, Paris, France
| | - A Nicolas
- Section de Recherche, Institut Curie, CNRS UMR3244, Paris, France
| | - W Chai
- WWAMI Medical Education Program, School of Molecular Biosciences, Washington State University, Spokane, WA, USA
| | - D Raz
- Department of Surgery, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - K L Reckamp
- Department of Medical Oncology and Therapeutics Research, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
| | - B Shen
- Department of Radiation Biology, Beckman Research Institute, City of Hope National Medical Center, Duarte, CA, USA
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Chai W, Zhang N, Wang YQ, Pu J, He B. [The pathophysiological roles and regulatory mechanism of retinoic acid receptor-related orphan receptors]. Sheng Li Ke Xue Jin Zhan 2013; 44:87-92. [PMID: 23847917] [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: 06/02/2023]
Abstract
Nuclear receptors are a large superfamily of transcription factors that regulate genes important to physiological functions. Retinoid-related orphan receptors (RORs), also known as NF1R, are so named because its gene sequence is similar to retinoid acid receptor and retinoid X receptor. RORs subfamily consists of three members: RORalpha, RORbeta, and RORgamma. Previous studies have established key roles for the RORs in physiological development, cytogenesis and differentiation of immune cells, circadian rhythm, and metabolism, through the regulation of gene expression. Besides, RORs also involve in many pathological process. Recent studies indicated that the abnormal expression of RORs is related to the development of tumor, immune inflammatory diseases, and cardiovascular diseases. thought to be the one of the key transcription factors which regulate the gene expression of these diseases. This review discusses the biological characteristics and pathophysiological roles of RORs subfamily.
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Affiliation(s)
- Wen Chai
- Department of Cardiology, Shanghai Renji Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200127, China
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Kearney B, Chai W, Patel J, Kittleson M, Rafiei M, Stern L, Czer L, Kobashigawa J. 588 Does Level of Education Affect Outcome after Heart Transplantation. J Heart Lung Transplant 2012. [DOI: 10.1016/j.healun.2012.01.601] [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: 10/28/2022] Open
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Moriguchi J, Patel J, Kittleson M, Rafiei M, Stern L, Chai W, Chang D, Trento A, Czer L, Kobashigawa J. 684 Risk for Deep Vein Thrombosis and Pulmonary Embolism after Heart Transplantation: Characterization of an Old Problem. J Heart Lung Transplant 2012. [DOI: 10.1016/j.healun.2012.01.699] [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: 11/28/2022] Open
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Gao CJ, Niu L, Ren PC, Wang W, Zhu C, Li YQ, Chai W, Sun XD. Hypoxic preconditioning attenuates global cerebral ischemic injury following asphyxial cardiac arrest through regulation of delta opioid receptor system. Neuroscience 2011; 202:352-62. [PMID: 22200548 DOI: 10.1016/j.neuroscience.2011.11.060] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 11/24/2011] [Accepted: 11/28/2011] [Indexed: 12/22/2022]
Abstract
This study was designed to investigate whether delta opioid receptor (DOR) is involved in the neuroprotective effect induced by hypoxic preconditioning (HPC) in the asphyxial cardiac arrest (CA) rat model. Twenty-four hours after the end of 7-day HPC, the rats were subjected to 8-min asphyxiation and resuscitated with a standardized method. In the asphyxial CA rat model, HPC improved the neurological deficit score (NDS), inhibited neuronal apoptosis, and increased the number of viable hippocampal CA1 neurons at 24 h, 72 h, or 7 days after restoration of spontaneous circulation (ROSC); however, the above-mentioned neuroprotection of HPC was attenuated by naltrindole (a selective DOR antagonist). The expression of hypoxia-inducible factor-1α (HIF-1α) and DOR, and the content of leucine enkephalin (L-ENK) in the brain were also investigated after the end of 7-day HPC. HPC upregulated the neuronal expression of HIF-1α and DOR, and synchronously elevated the content of L-ENK in the rat brain. HIF-1α siRNA was used to further elucidate the relationship between HIF-1α and DOR in the HPC-treated brain. Knockdown of HIF-1α by siRNA markedly abrogated the HPC induced upregulation of HIF-1α and DOR. The present study demonstrates that the expression of DOR in the rat brain is upregulated by HIF-1α following exposure to 7-day HPC, at the same time, HPC also increases the production of endogenous DOR ligand L-ENK in the brain. DOR activation after HPC results in prolonged neuroprotection against subsequent global cerebral ischemic injury, suggesting a new mechanism of HPC-induced neuroprotection on global cerebral ischemia following CA and resuscitation.
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Affiliation(s)
- C-J Gao
- Department of Anesthesiology, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province 710038, China
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Fernández-Ortuño D, Li X, Chai W, Schnabel G. First Report of Gray Mold of Strawberry Caused by Botrytis cinerea in South Carolina. Plant Dis 2011; 95:1482. [PMID: 30731771 DOI: 10.1094/pdis-06-11-0529] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Gray mold caused by Botrytis spp. is one of the most economically important diseases of cultivated strawberry (Fragaria × ananassa) worldwide. From April to June 2011, strawberries with symptoms resembling gray mold disease were collected from different locations (Chesnee, Florence, Lexington, McBee, Monetta, and North Augusta) in South Carolina. Fruit infections began as small, firm, light brown lesions that enlarged quickly, becoming covered with a gray, fuzzy mass of spores followed by a soft rot. To isolate the causal agent, spores from symptomatic fruit were suspended in 1% Tween 20, streaked onto the surface of potato dextrose agar plates, and incubated at 22°C. Fungal colonies from single spores were at first colorless and later became gray to brown when the conidiphores and conidia developed. Conidia were identified by their morphological characteristics: an average size of 14 × 9 μm, ellipsoid to rounded without internal structure, and with a scar on the point of union to the conidiophore (1). Sclerotia produced in culture were hard, dark, irregular shaped, and formed after 2 weeks. The pathogen was identified as Botrytis cinerea Pers.: on the basis of morphology and confirmed by a restriction digest with ApoI of the 413-kb PCR amplification product obtained with BA2f/BA1r primers (2). Koch's postulates were conducted by inoculating 10 surface-sterilized strawberries with a conidial suspension (105 spores/ml) of a randomly chosen B. cinerea isolate previously characterized; 10 control fruit received sterile water without conidia. The inoculated fruit were incubated for 3 days at room temperature in air-tight plastic bags. Inoculated fruit developed typical gray mold symptoms with gray sporulating lesions. The developing spores on inoculated fruit were confirmed to be B. cinerea. All control fruit remained healthy. For many Botrytis spp., the internal transcribed spacer region does not reveal nucleotide variations and thus is useless for species identification. We used additional, more appropriate genetic markers for molecular-based species identification and verified that strawberries in South Carolina are affected by gray mold disease caused by B. cinerea. To our knowledge, this is the first scientific report of B. cinerea causing gray mold of strawberry in South Carolina. References: (1) W. R. Jarvis. Botryotinia and Botrytis Species: Taxonomy, Physiology and Pathogenicity. A Guide to the Literature. Monograph no. 15. Canada Department of Agriculture, Research Branch, Ottawa, 1977. (2) K. Nielsen et al. Plant Dis. 86:682, 2002.
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Affiliation(s)
- D Fernández-Ortuño
- Department of Entomology, Soils, and Plant Sciences, Clemson University, Clemson, SC
| | - X Li
- Department of Entomology, Soils, and Plant Sciences, Clemson University, Clemson, SC
| | - W Chai
- Department of Entomology, Soils, and Plant Sciences, Clemson University, Clemson, SC
| | - G Schnabel
- Department of Entomology, Soils, and Plant Sciences, Clemson University, Clemson, SC
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Barrett EJ, Eggleston EM, Inyard AC, Wang H, Li G, Chai W, Liu Z. The vascular actions of insulin control its delivery to muscle and regulate the rate-limiting step in skeletal muscle insulin action. Diabetologia 2009; 52:752-64. [PMID: 19283361 PMCID: PMC2704146 DOI: 10.1007/s00125-009-1313-z] [Citation(s) in RCA: 220] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2008] [Accepted: 01/30/2009] [Indexed: 12/22/2022]
Abstract
Evidence suggests that insulin delivery to skeletal muscle interstitium is the rate-limiting step in insulin-stimulated muscle glucose uptake and that this process is impaired by insulin resistance. In this review we examine the basis for the hypothesis that insulin acts on the vasculature at three discrete steps to enhance its own delivery to muscle: (1) relaxation of resistance vessels to increase total blood flow; (2) relaxation of pre-capillary arterioles to increase the microvascular exchange surface perfused within skeletal muscle (microvascular recruitment); and (3) the trans-endothelial transport (TET) of insulin. Insulin can relax resistance vessels and increase blood flow to skeletal muscle. However, there is controversy as to whether this occurs at physiological concentrations of, and exposure times to, insulin. The microvasculature is recruited more quickly and at lower insulin concentrations than are needed to increase total blood flow, a finding consistent with a physiological role for insulin in muscle insulin delivery. Microvascular recruitment is impaired by obesity, diabetes and nitric oxide synthase inhibitors. Insulin TET is a third potential site for regulating insulin delivery. This is underscored by the consistent finding that steady-state insulin concentrations in plasma are approximately twice those in muscle interstitium. Recent in vivo and in vitro findings suggest that insulin traverses the vascular endothelium via a trans-cellular, receptor-mediated pathway, and emerging data indicate that insulin acts on the endothelium to facilitate its own TET. Thus, muscle insulin delivery, which is rate-limiting for its metabolic action, is itself regulated by insulin at multiple steps. These findings highlight the need to further understand the role of the vascular actions of insulin in metabolic regulation.
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Affiliation(s)
- E J Barrett
- University of Virginia Health System, Charlottesville, VA 22908, USA.
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Sun X, Zhang H, Gao C, Zhang G, Xu L, Lv M, Chai W. Imaging the effects of propofol on human cerebral glucose metabolism using positron emission tomography. J Int Med Res 2009; 36:1305-10. [PMID: 19094440 DOI: 10.1177/147323000803600618] [Citation(s) in RCA: 22] [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: 01/18/2023] Open
Abstract
The effects of propofol on glucose metabolism in different cerebral regions were observed, using positron emission tomography (PET) technology, to determine a possible cerebral target region. Seven healthy volunteers were injected with (18)F-fluorodeoxyglucose developing agent for PET scanning whilst awake (control group T1), during sedation (induced by 1.5 microg/ml propofol administered by target controlled injection [TCI], group T2) and when unconsciousness (induced by 2.5 microg/ml propofol administered by TCI, group T3). Whole brain glucose metabolism was reduced during propofol anaesthesia; this was initially observed in the cortical areas at the lower dose of propofol (group T2) but extended to the subcortical regions, especially the thalamus and hippocampus, at the higher dose (group T3). This suggests that these regions of the brain might be important targets that are susceptible to propofol.
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Affiliation(s)
- X Sun
- Department of Anaesthesiology, Tangdu Hospital, Fourth Military Medical University, Xi'an, Shaanxi Province, China
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Nakajima K, Ohta K, Mostefaoui TA, Chai W, Utsukihara T, Horiuchi CA, Murakami M. Glyoxal sample preparation for high-performance liquid chromatographic detection of 2,4-dinitro-phenylhydrazone derivative: Suppression of polymerization and mono-derivative formation by using methanol medium. J Chromatogr A 2007; 1161:338-41. [PMID: 17632113 DOI: 10.1016/j.chroma.2007.06.057] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2007] [Revised: 06/22/2007] [Accepted: 06/27/2007] [Indexed: 10/23/2022]
Abstract
Some difficulties on a sampling of gaseous glyoxal using DNPH-silica cartridge were discussed, and an alternative sampling procedure was proposed. When glyoxal was sampled using the cartridge, it partially formed mono-hydrazone with various degrees, whereas it was quantitatively converted into its bis-hydrazone when sample gas was directly bubbled into a DNPH acidic solution. Additionally, glyoxal polymerized on the inner wall of the system during trapping to the silica cartridge. We found that the polymerization of glyoxal was effectively suppressed by dissolving glyoxal into methanol under reduced pressure; glyoxal in methanol readily reacted with DNPH in a hydrochloric acid solution and gave bis-hydrazone derivative, without any interference of methanol and any formation of mono-hydrazone derivative. When glyoxal was sampled by the proposed method, 102% of recovery was obtained, whereas it was reduced to 92.7% when the trapped glyoxal was dissolved into methanol under atmosphere.
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Affiliation(s)
- Koichi Nakajima
- Science Research center, Hosei University, 2-17-1 Fujimi, Chiyoda-ku, Tokyo 102-8160, Japan.
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Itoh KI, Ueki T, Mikami H, Chai W, Sakamaki H, Horiuchi CA. Reaction of olefins using cerium(IV) sulfate tetrahydrate in carbonyl compounds-H2O. Appl Organomet Chem 2005. [DOI: 10.1002/aoc.906] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Chai W, Handa Y, Suzuki M, Saito M, Kato N, Horiuchi CA. Biodegradation of Bisphenol A by Fungi. Appl Biochem Biotechnol 2005; 120:175-82. [PMID: 15767692 DOI: 10.1385/abab:120:3:175] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2004] [Revised: 08/25/2004] [Accepted: 09/01/2004] [Indexed: 11/11/2022]
Abstract
The biologic degradation of 2,2-bis(4-hydroxyphenyl)propane (bisphenol A [BPA]; 1) was studied with 26 fungi. An initial BPA concentration of 40 ppm in an aqueous solution was degraded in the dark for 14 d. Among the 26 strains tested, 11 degraded BPA at 50% or more. Furthermore, four strains (F. sporotrichioides NFRI-1012, F. moniliforme 2-2, A. terreus MT-13, and E. nidulans MT-98) were more effective for degradation of BPA.
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Affiliation(s)
- Wen Chai
- Department of Chemistry, Rikkyo (St. Paul's) University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan
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