1
|
Xu M, Zhang Y, Wang K, Mao J, Ji W, Qiu W, Feng T, Zhang M, Mao L. Nanoskiving fabrication of size-controlled Au nanowire electrodes for electroanalysis. Analyst 2019; 144:2914-2921. [PMID: 30912775 DOI: 10.1039/c9an00122k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Nanoskiving, benefiting from its simple operation and high reproducibility, is a promising method to fabricate nanometer-size electrodes. In this work, we report the fabrication of Au nanowire electrodes with different shapes and well-controlled sizes through nanoskiving. Au nanowire block electrodes, membrane electrodes and tip electrodes are prepared with good reproducibility. Steady-state cyclic voltammograms (CVs) demonstrate that all these electrodes behave well as nanoband ultramicroelectrodes. A fast heterogeneous electron transfer rate constant can be extracted reliably from steady-state CVs at various size Au nanowire block electrodes by the Koutecký-Levich (K-L) method. The Au nanowire membrane electrodes demonstrate good sensitivity toward the oxidation of catecholamine and could monitor catecholamine released from rat adrenal chromaffin cells stimulated by high K+.
Collapse
Affiliation(s)
- Muzhen Xu
- Department of Chemistry, Renmin University of China, Beijing, 100872, China.
| | - Yue Zhang
- Department of Chemistry, Renmin University of China, Beijing, 100872, China.
| | - Kai Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China
| | - Jinpeng Mao
- Department of Chemistry, Renmin University of China, Beijing, 100872, China.
| | - Wenliang Ji
- Department of Chemistry, Renmin University of China, Beijing, 100872, China.
| | - Wanling Qiu
- Department of Chemistry, Renmin University of China, Beijing, 100872, China.
| | - Taotao Feng
- Department of Chemistry, Renmin University of China, Beijing, 100872, China.
| | - Meining Zhang
- Department of Chemistry, Renmin University of China, Beijing, 100872, China.
| | - Lanqun Mao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, China
| |
Collapse
|
2
|
Cheng P, Chen K, Xia Y, Dai W, Wang F, Shen M, Wang C, Yang J, Zhu R, Zhang H, Li J, Zheng Y, Wang J, Zhang Y, Lu J, Zhou Y, Guo C. Hydrogen sulfide, a potential novel drug, attenuates concanavalin A-induced hepatitis. Drug Des Devel Ther 2014; 8:1277-86. [PMID: 25246769 PMCID: PMC4166909 DOI: 10.2147/dddt.s66573] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Hydrogen sulfide (H2S) is known to exert anti-inflammatory properties. Apoptosis and autophagy play important roles in concanavalin A (Con A)-induced acute hepatitis. The purpose of this study was to explore both the effect and mechanism of H2S on Con A-induced acute hepatitis. METHODS BALB/c mice were randomized into sham group, Con A-injection group, and 14 μmol/kg of sodium hydrosulfide (NaHS, an H2S donor) pretreatment group. RESULTS Aspartate aminotransferase, alanine aminotransferase, and pathological damage were significantly ameliorated by NaHS pretreatment. NaHS pretreatment significantly reduced the levels of interleukin-6 and tumor necrosis factor-α compared with those of the Con A group. The expression of Bcl-2, Bax, Beclin-1, and LC3-2, which play important roles in the apoptosis and autophagy pathways, were also clearly affected by NaHS. Furthermore, NaHS affected the p-mTOR and p-AKT. CONCLUSION H2S attenuates Con A-induced acute hepatitis by inhibiting apoptosis and autophagy, in part, through activation of the PtdIns3K-AKT1 signaling pathway.
Collapse
Affiliation(s)
- Ping Cheng
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Kan Chen
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Yujing Xia
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Weiqi Dai
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Fan Wang
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Miao Shen
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Chengfen Wang
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Jing Yang
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Rong Zhu
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Huawei Zhang
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Jingjing Li
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Yuanyuan Zheng
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Junshan Wang
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Yan Zhang
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Jie Lu
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Yingqun Zhou
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| | - Chuanyong Guo
- Department of Gastroenterology, Shanghai Tenth People's Hospital, Tongji University of Medicine, Shanghai, People's Republic of China
| |
Collapse
|
3
|
Cheng P, Wang F, Chen K, Shen M, Dai W, Xu L, Zhang Y, Wang C, Li J, Yang J, Zhu R, Zhang H, Zheng Y, Lu J, Zhou Y, Guo C. Hydrogen sulfide ameliorates ischemia/reperfusion-induced hepatitis by inhibiting apoptosis and autophagy pathways. Mediators Inflamm 2014; 2014:935251. [PMID: 24966472 PMCID: PMC4055384 DOI: 10.1155/2014/935251] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 04/08/2014] [Accepted: 04/08/2014] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Hepatic ischemia/reperfusion (I/R) injury is an important clinical problem, and its consequences can seriously threaten human health. Apoptosis and autophagy have been shown to contribute to cell death in hepatic I/R injury. Hydrogen sulfide (H2S) is the third most common endogenously produced gaseous signaling molecule and is known to exert a protective effect against hepatic I/R injury. In this study, the purpose is to explore both the effect and mechanism of H2S on hepatic I/R injury. METHODS Balb/c mice were randomized into Sham, I/R, or two doses (14 μmol/kg and 28 μmol/kg) of sodium hydrosulfide (NaHS, an H2S donor) preconditioning groups. RESULTS NaHS significantly reduced the levels of TNF- α and IL-6 at 12 h and 24 h after injection compared with ischemia/reperfusion challenge alone. The expression of Bcl-2, Bax, Beclin-1, and LC3, which play important roles in the regulation of the apoptosis and autophagy pathways, was also clearly affected by NaHS. Furthermore, NaHS affected the p-JNK1, p-ERK1, and p-p38. CONCLUSION Our results indicate that H2S attenuates hepatic I/R injury, at least in part, by regulating apoptosis through inhibiting JNK1 signaling. The autophagy agonist rapamycin potentiated this hepatoprotective effect by reversing the inhibition of autophagy by H2S.
Collapse
Affiliation(s)
- Ping Cheng
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Fan Wang
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Kan Chen
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Miao Shen
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Weiqi Dai
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Ling Xu
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
- Department of Gastroenterology, The Tongren Hospital of Shanghai Jiaotong University, Shanghai 200050, China
| | - Yan Zhang
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Chengfen Wang
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Jingjing Li
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Jing Yang
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Rong Zhu
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
- Department of Gastroenterology, Clinical Medical College of the Tenth People's Hospital of Nangjing Medical University, Shanghai 200072, China
| | - Huawei Zhang
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
- Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Yuanyuan Zheng
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Jie Lu
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Yingqun Zhou
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| | - Chuanyong Guo
- Department of Gastroenterology, The Tenth People's Hospital of Tongji University, Shanghai 200072, China
| |
Collapse
|