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Gong SH, Kuai J, Wang JD, Liu F, Wu JF, Wang XC, Cheng JP. Fe 3O 4nanoparticles anchored on carbon nanotubes as high-performance anodes for asymmetric supercapacitors. Nanotechnology 2023; 34:505402. [PMID: 37708883 DOI: 10.1088/1361-6528/acf9af] [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] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 09/14/2023] [Indexed: 09/16/2023]
Abstract
Fe3O4/CNT composites are synthesized with ethylene glycol as solvent by a one-step solvothermal method and used as anode materials for asymmetric supercapacitors (ASC). An appropriate amount of water in ethylene glycol can accelerate the formation of Fe3O4and reduce the average size of Fe3O4to around 20 nm. However, spherical Fe3O4particles larger than 100 nm will form in pure ethylene glycol for long reaction time. The Fe3O4/CNT composite with small Fe3O4nanoparticles exhibits a high specific surface area, promoted electron transfer ability, as well as a high utilization rate of active materials. The optimized electrode shows a high specific capacity of 689 C g-1at 1 A g-1, and remains 443 C g-1at 10 A g-1. The inferior long-term cycling stability is due to the phase transition of Fe3O4and a reductive effect to form metallic Fe. An ASC using Fe3O4/CNT and NiCoO2/C composites as anode and cathode, respectively, delivers a high energy density of 58.1 Wh kg-1at a power density of 1007 W kg-1in a voltage window of 1.67 V and has a capacity retention of 63% after 5000 cycles. The self-discharge behavior of the ASC is also investigated.
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Affiliation(s)
- S H Gong
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - J Kuai
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - J D Wang
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - F Liu
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Zhejiang University, Hangzhou 310027, People's Republic of China
| | - J F Wu
- College of Information Science & Technology, Zhejiang Shuren University, Hangzhou 310015, People's Republic of China
| | - X C Wang
- Key Laboratory of Material Physics of Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, People's Republic of China
| | - J P Cheng
- State Key Laboratory of Silicon and Advanced Semiconductor Materials, School of Materials Science and Engineering, Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province, Zhejiang University, Hangzhou 310027, People's Republic of China
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Kuai J, Wu K, Han T, Zhai W, Sun R. LncRNA HOXA10-AS promotes the progression of esophageal carcinoma by regulating the expression of HOXA10. Cell Cycle 2023; 22:276-290. [PMID: 36588458 PMCID: PMC9851206 DOI: 10.1080/15384101.2022.2108633] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [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: 04/22/2021] [Revised: 02/08/2022] [Accepted: 07/28/2022] [Indexed: 01/03/2023] Open
Abstract
Esophageal cancer (EC) remains a primary cause of cancer-associated fatality worldwide and is characterized by poor prognosis. HOXA10-AS is reported to be relevant with the development of different human cancers. However, its role and regulatory mechanism in EC are still obscure. Our study targeted at investigating the functional and mechanical roles of HOXA10-AS in EC. We confirmed by RT-qPCR that HOXA10-AS presented a remarkably high expression in EC cells. Functional experiments demonstrated that knocking down HOXA10-AS weakened proliferation, invasion and migration in vitro and impeded tumorigenesis in vivo. Further, we found that HOXA10-AS positively regulated its neighbor gene HOXA10 and influenced EC cell biological activities depending on HOXA10. Mechanistically, we showed that HOXA10-AS combined with FMR1 to target and stabilize HOXA10 mRNA. Moreover, HOXA10 served as a transcriptional factor to stimulate the transcription of its target gene CHDH. Finally, rescue assays confirmed that HOXA10 influenced EC cell growth through modulating CHDH. In conclusion, our study first determines the function of HOXA10-AS in EC and demonstrates its mechanism relating to HOXA10/CHDH, suggesting HOXA10-AS as a potential novel target for EC treatment. [Figure: see text].
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Affiliation(s)
- Jinghua Kuai
- Department of Gastroenterology, Qilu Hospital of Shandong University (Qingdao), Qingdao, China
| | - Kangkang Wu
- Department of Gastroenterology, Qilu Hospital of Shandong University (Qingdao), Qingdao, China
| | - Ting Han
- Department of Gastroenterology, Qilu Hospital of Shandong University (Qingdao), Qingdao, China
| | - Wenzhe Zhai
- Department of Gastroenterology, Qilu Hospital of Shandong University (Qingdao), Qingdao, China
| | - Ruijie Sun
- Department of Otolaryngology, Qilu Hospital of Shandong University (Qingdao), Qingdao, China
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Gong S, Wang B, Xue Y, Sun Q, Wang J, Kuai J, Liu F, Cheng J. NiCoO2 and polypyrrole decorated three-dimensional carbon nanofiber network with coaxial cable-like structure for high-performance supercapacitors. J Colloid Interface Sci 2022; 628:343-355. [DOI: 10.1016/j.jcis.2022.07.134] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Revised: 07/20/2022] [Accepted: 07/21/2022] [Indexed: 01/17/2023]
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Kuai J, Zheng L, Yi X, Liu Z, Qiu B, Lu Z, Jiang Y. ST8SIA6-AS1 promotes the development of hepatocellular carcinoma cells through miR-338-3p/NONO Axis. Dig Liver Dis 2021; 53:1192-1200. [PMID: 33722502 DOI: 10.1016/j.dld.2021.02.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 01/19/2021] [Accepted: 02/09/2021] [Indexed: 12/11/2022]
Abstract
BACKGROUND Increasing studies have shown a vital fact that long non-coding RNAs (lncRNAs) play a considerable regulatory role in hepatocellular carcinoma (HCC) progression. However, whether ST8 alpha-N-acetyl-neuraminide alpha-2, 8-sialyltransferase 6 antisense RNA 1 (ST8SIA6-AS1) affects the development of HCC is unclear. METHODS The target genes in HCC cell lines were quantified via utilzing quantitative real-time polymerase chain reaction (RT-qPCR) analysis and western blot. Effects of ST8SIA6-AS1 on proliferative, apoptosis and migratory ability of HCC cells were proved by a series of function experiments. The cellular distribution of ST8SIA6-AS1 was examined through fluorescent in situ hybridization (FISH) assay and subcellular fractionation experiments. RNA pulldown assay was implemented to explore the target of ST8SIA6-AS1. RNA Binding Protein Immunoprecipitation (RIP) and luciferase reporter assays were performed to identify the specific relationships between miR-338-3p and ST8SIA6-AS1/ non-POU domain containing octamer binding (NONO). RESULTS The expression of ST8SIA6-AS1 was apparently elevated in HCC cell. Silenced ST8SIA6-AS1 reduced proliferative, migratory and invasive ability of HCC cells. Moreover, ST8SIA6-AS1 targeted miR-338-3p to modulate the expression of NONO in HCC cells. CONCLUSIONS ST8SIA6-AS1 enhances the progression of HCC via miR-338-3p/NONO axis in vitro.
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Affiliation(s)
- Jinghua Kuai
- Department of Gastroenterology, Qilu Hospital of Shandong University, Qingdao 266000, Shandong, China
| | - Lijie Zheng
- Department of General Surgery, Qilu Hospital of Shandong University, No.758 Hefei Road, Shibei District, Qingdao 266000, Shandong, China.
| | - Xin Yi
- Department of General Surgery, Qilu Hospital of Shandong University, No.758 Hefei Road, Shibei District, Qingdao 266000, Shandong, China
| | - Zengli Liu
- Department of General Surgery, Qilu Hospital of Shandong University, No.758 Hefei Road, Shibei District, Qingdao 266000, Shandong, China
| | - Bo Qiu
- Department of General Surgery, Qilu Hospital of Shandong University, No.758 Hefei Road, Shibei District, Qingdao 266000, Shandong, China
| | - Zhihua Lu
- Department of General Surgery, Qilu Hospital of Shandong University, No.758 Hefei Road, Shibei District, Qingdao 266000, Shandong, China
| | - Yuanhui Jiang
- Department of General Surgery, Qilu Hospital of Shandong University, No.758 Hefei Road, Shibei District, Qingdao 266000, Shandong, China
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Abstract
Three residues of human ADP-ribosylation factor 3 (ARF3) (F51, W66 and Y81) cluster into a hydrophobic pocket in the inactive, GDP-bound protein. Disruption of the hydrophobic pocket with mutations at these residues increased the rate of GDP dissociation and association, but not always that of GTPgammaS. Several of the same mutants were found to be defective, often selectively, in binding different ARF effectors in two-hybrid assays. These results highlight three features of these hydrophobic residues in regulating (1) the rate of GDP dissociation, (2) the conformational changes that promote GTP binding and (3) their role in binding target proteins.
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Affiliation(s)
- J Kuai
- Department of Biochemistry, Emory University School of Medicine, 1510 Clifton Rd, Atlanta, GA 30322-3050, USA
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Abstract
The stoichiometry of the binding of GTP to ADP-ribosylation factor (ARF) proteins, normally quite low at approximately 0.05 mol/mol protein, was found to increase to a maximum of 1 mol/mol in the presence of effectors. The mechanism of this action was found to result from the ability of these effectors to increase the affinity of ARF for activating guanine nucleotide triphosphates. The existence of a conformation of ARF with low affinity (>100 micrometer) for GTP is proposed. The actions of effectors to increase the equilibrium binding of GTP is interpreted as evidence that these same effectors interact with and modulate the affinity of the inactive ARF for GTP. A new model for these interactions among ARF, effectors, and GTP is proposed, and a preliminary test in cells is supportive of these observations with relevance to signaling in cells.
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Affiliation(s)
- X Zhu
- Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia 30322-3050, USA
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Kuai J, Boman AL, Arnold RS, Zhu X, Kahn RA. Effects of activated ADP-ribosylation factors on Golgi morphology require neither activation of phospholipase D1 nor recruitment of coatomer. J Biol Chem 2000; 275:4022-32. [PMID: 10660559 DOI: 10.1074/jbc.275.6.4022] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Nine mutations in the switch I and switch II regions of human ADP-ribosylation factor 3 (ARF3) were isolated from loss-of-interaction screens, using two-hybrid assays with three different effectors. We then analyzed the ability of the recombinant proteins to (i) bind guanine nucleotides, (ii) activate phospholipase D1 (PLD1), (iii) recruit coatomer (COP-I) to Golgi-enriched membranes, and (iv) expand and vesiculate Golgi in intact cells. Correlations of activities in these assays were used as a means of testing specific hypotheses of ARF action, including the role of PLD1 activation in COP-I recruitment, the role of COP-I in Golgi vesiculation caused by expression of the dominant activating mutant [Q71L]ARF3, and the need for PLD1 activation in Golgi vesiculation. Because we were able to find at least one example of a protein that has lost each of these activities with retention of the others, we conclude that activation of PLD1, recruitment of COP-I to Golgi, and vesiculation of Golgi in cells are functionally separable processes. The ability of certain mutants of ARF3 to alter Golgi morphology without changes in PLD1 activity or COP-I binding is interpreted as evidence for at least one additional, currently unidentified, effector for ARF action at the Golgi.
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Affiliation(s)
- J Kuai
- Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia 30322-3050, USA
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Abstract
Arf proteins comprise a family of 21-kDa GTP-binding proteins with many proposed functions in mammalian cells, including the regulation of several steps of membrane transport, maintenance of organelle integrity, and activation of phospholipase D. We performed a yeast two-hybrid screen of human cDNA libraries using a dominant activating allele, [Q71L], of human Arf3 as bait. Eleven independent isolates contained plasmids encoding the C-terminal tail of mitotic kinesin-like protein-1 (MKLP1). Further deletion mapping allowed the identification of an 88 amino acid Arf3 binding domain in the C-terminus of MKLP1. This domain has no clear homology to other Arf binding proteins or to other proteins in the protein databases. The C-terminal domain of MKLP1 was expressed and purified from bacteria as a GST fusion protein and shown to bind Arf3 in a GTP-dependent fashion. A screen for mutations in Arf3 that specifically lost the ability to bind MKLP1 identified 10 of 14 point mutations in the GTP-sensitive switch I or switch II regions of Arf3. Two-hybrid assays of the C-terminal domain of MKLP1 with each of the human Arf isoforms revealed strong interaction with each. Taken together, these data are all supportive of the conclusion that activated Arf proteins bind to the C-terminal "tail" domain of MKLP1.
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Affiliation(s)
- A L Boman
- Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia 30322-3050, USA
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Abstract
Arf proteins comprise a family of 21-kDa GTP-binding proteins with many proposed functions in mammalian cells, including the regulation of several steps of membrane transport, maintenance of organelle integrity, and activation of phospholipase D. We performed a yeast two-hybrid screen of human cDNA libraries using a dominant activating allele, [Q71L], of human Arf3 as bait. Eleven independent isolates contained plasmids encoding the C-terminal tail of mitotic kinesin-like protein-1 (MKLP1). Further deletion mapping allowed the identification of an 88 amino acid Arf3 binding domain in the C-terminus of MKLP1. This domain has no clear homology to other Arf binding proteins or to other proteins in the protein databases. The C-terminal domain of MKLP1 was expressed and purified from bacteria as a GST fusion protein and shown to bind Arf3 in a GTP-dependent fashion. A screen for mutations in Arf3 that specifically lost the ability to bind MKLP1 identified 10 of 14 point mutations in the GTP-sensitive switch I or switch II regions of Arf3. Two-hybrid assays of the C-terminal domain of MKLP1 with each of the human Arf isoforms revealed strong interaction with each. Taken together, these data are all supportive of the conclusion that activated Arf proteins bind to the C-terminal "tail" domain of MKLP1.
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Affiliation(s)
- A L Boman
- Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia 30322-3050, USA
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Dilley DR, Wilson ID, Kuai J, Poneleit L, Zhu Y, Pekker Y. MOLECULAR BIOLOGY OF POME FRUIT RIPENING AND SENESCENCE: CONCEPTS, STATUS, PERSPECTIVES AND FUTURE PROSPECTS. ACTA ACUST UNITED AC 1993. [DOI: 10.17660/actahortic.1993.326.36] [Citation(s) in RCA: 3] [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: 11/17/2022]
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