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Huang Y, Yang Y, Liang B, Lu S, Yuan X, Jia Z, Liu J, Liu Y. Green Nanopesticide: pH-Responsive Eco-Friendly Pillar[5]arene-Modified Selenium Nanoparticles for Smart Delivery of Carbendazim to Suppress Sclerotinia Diseases. ACS Appl Mater Interfaces 2023; 15:16448-16459. [PMID: 36943808 DOI: 10.1021/acsami.2c23241] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Controlled-release delivery systems have been widely used to improve the efficacy and bioavailability of pesticides and minimize environmental risks. Herein, a fungicide carbendazim (CBZ)-loaded, a kind of nanovalve including trimethylammoniumpillar[5]arene (AP5), and methyl orange (MO)-functionalized mesoporous selenium (MSe) nanopesticides (CBZ@AP5/MSe⊃MO) were prepared. The nanovalve endowed CBZ@AP5/MSe⊃MO with a pH-responsive property, so the CBZ@AP5/MSe⊃MO can respond to the microenvironment of the pathogen Sclerotinia sclerotiorum (S. sclerotiorum). First, MO was shed due to protonation, and AP5-functionalized MSe gradually dissolved in an acid environment. Finally, CBZ was released rapidly. It is reported that AP5 and MO as the host and guest functionalized mesoporous selenium (MSe) have never been applied to agriculture. In vitro release experiments showed that the cumulative release rate of CBZ at pH 4.5 was 1.74 times higher than that in a neutral environment. In addition, we found that the contact angle of the CBZ@AP5/MSe⊃MO in maize and rape leaves was effectively decreased, which could retain more in the leaves after washout. It can also decrease the dry biomass and the reducing sugar of S.sclerotiorum. The CBZ@AP5/MSe⊃MO holds a good safety profile for plants, animal cells, and the environment owing to the targeted release properties. These results suggest that CBZ@AP5/MSe⊃MO is an environmentally friendly and effective drug-loaded system against S. sclerotiorum. It provides a new strategy for the design and development of nanopesticides and the control of S. sclerotiorum.
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Affiliation(s)
- Yuqin Huang
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 511436, China
| | - Yonglan Yang
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 511436, China
| | - Bin Liang
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 511436, China
| | - Shuhao Lu
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 511436, China
| | - Xiaoyu Yuan
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 511436, China
| | - Zhi Jia
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 511436, China
| | - Jie Liu
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 511436, China
| | - Yanan Liu
- Department of Chemistry, College of Chemistry and Materials Science, Jinan University, Guangzhou 511436, China
- Shenzhen Longhua Maternity and Child Healthcare Hospital, Shenzhen 518110, China
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Eskandari Nasrabad A, Laghaei R, Coalson RD. Morphology of Polymer Brushes in the Presence of Attractive Nanoparticles: Effects of Temperature. Int J Mol Sci 2023; 24. [PMID: 36614298 DOI: 10.3390/ijms24010832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/22/2022] [Accepted: 12/27/2022] [Indexed: 01/05/2023] Open
Abstract
We study the role of temperature on the structure of pure polymer brushes and their mixture with attractive nanoparticles in flat and cylindrical geometries. It has previously been established that the addition of such nanoparticles causes the polymer brush to collapse and the intensity of the collapse depends on the attraction strength, the nanoparticle diameter, and the grafting density. In this work, we carry out molecular dynamics simulation under good solvent conditions to show how the collapse transition is affected by the temperature, for both plane grafted and inside-cylinder grafted brushes. We first examine the pure brush morphology and verify that the brush height is insensitive to temperature changes in both planar and cylindrical geometries, as expected for a polymer brush in a good solvent. On the other hand, for both system geometries, the brush structure in the presence of attractive nanoparticles is quite responsive to temperature changes. Generally speaking, for a given nanoparticle concentration, increasing the temperature causes the brush height to increase. A brush which contracts when nanoparticles are added eventually swells beyond its pure brush height as the system temperature is increased. The combination of two easily controlled external parameters, namely, concentration of nanoparticles in solution and temperature, allows for sensitive and reversible adjustment of the polymer brush height, a feature which could be exploited in designing smart polymer devices.
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Wang CY, Lou XY, Cai Z, Zhang MZ, Jia C, Qin JC, Yang YW. Supramolecular Nanoplatform Based on Mesoporous Silica Nanocarriers and Pillararene Nanogates for Fungus Control. ACS Appl Mater Interfaces 2021; 13:32295-32306. [PMID: 34196538 DOI: 10.1021/acsami.1c08582] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Synthetic fungicides have been widely used to protect crops from fungal diseases. However, excessive use of synthetic fungicides leads to the generation of fungicide resistance in fungal pathogens. Recently, smart cargo delivery systems have been introduced for the construction of a pesticide delivery nanoplatform, benefiting from their controlled release performance. Herein, a fungal pathogen microenvironment-responsive supramolecular fungicide nanoplatform has been designed and constructed, using quaternary ammonium salt (Q)-modified mesoporous silica nanoparticles (MSN-Q NPs) as nanocarriers loaded with berberine hydrochloride (BH) and carboxylatopillar[5]arene (CP[5]A) as nanogates to form BH-loaded CP[5]A@MSN-Q NPs for effective inhibition of Botrytis cinerea. CP[5]A as nanogates can endow the fungicide nanoplatform with pH stimuli-responsive release features for the control of fungicide release. The loaded BH, as a natural plant fungicide, provides an ecofriendly alternative to synthetic fungicides for controlling B. cinerea. Interestingly, we use oxalic acid (OA) secreted by B. cinerea as a trigger so that BH can be released from the fungicide nanoplatform on demand under pathogen microenvironments for controlling B. cinerea. The experimental results indicate that the fabricated fungicide nanoplatform could effectively inhibit the mycelial growth and spore germination, providing a new way for the management of B. cinerea in actual application.
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Affiliation(s)
- Chao-Yi Wang
- College of Chemistry and College of Plant Science, Jilin University, Changchun 130012, P. R. China
| | - Xin-Yue Lou
- College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Zhi Cai
- College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Ming-Zhe Zhang
- College of Plant Science, Jilin University, Changchun 130012, P. R. China
| | - Chengguo Jia
- College of Plant Science, Jilin University, Changchun 130012, P. R. China
| | - Jian-Chun Qin
- College of Plant Science, Jilin University, Changchun 130012, P. R. China
| | - Ying-Wei Yang
- College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
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Ye J, Tang S, Meng L, Li X, Wen X, Chen S, Niu L, Li X, Qiu W, Hu H, Jiang M, Shang S, Shu Q, Zheng H, Duan S, Li Y. Ultrasonic Control of Neural Activity through Activation of the Mechanosensitive Channel MscL. Nano Lett 2018; 18:4148-4155. [PMID: 29916253 DOI: 10.1021/acs.nanolett.8b00935] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Externally controlling the excitation of a neuronal subset through ion channels activation can modulate the firing pattern of an entire neural circuit in vivo. As nanovalves in the cell membrane, ion channels can be opened by light (optogenetics) or ultrasonic (sonogenetics) means. A thoroughly analyzed force sensor is the Escherichia coli mechano sensitive channel of large conductance (MscL). Here we expressed MscL in rat hippocampal neurons in a primary culture and showed that it could be activated by low-pressure ultrasound pulses. The gain-of-function mutation, I92L, sensitized MscL's sonic response, triggering action potentials at a peak negative pressure as low as 0.25 MPa. Further, the I92L MscL reliably elicited individual spikes by timed brief pulses, making excitation programmable. Because MscL opens to tension in the lipid bilayer, requiring no other proteins or ligands, it could be developed into a general noninvasive sonogenetic tool to manipulate the activities of neurons or other cells and potential nanodevices.
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Affiliation(s)
- Jia Ye
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Siyang Tang
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Long Meng
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Key Laboratory for MRI , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen , 518005 , China
| | - Xia Li
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Xiaoxu Wen
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Sihan Chen
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Lili Niu
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Key Laboratory for MRI , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen , 518005 , China
| | - Xiangyao Li
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Weibao Qiu
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Key Laboratory for MRI , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen , 518005 , China
| | - Hailan Hu
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Mizu Jiang
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Shiqiang Shang
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Qiang Shu
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Hairong Zheng
- Paul C. Lauterbur Research Center for Biomedical Imaging, Shenzhen Key Laboratory for MRI , Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences , Shenzhen , 518005 , China
| | - Shumin Duan
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
| | - Yuezhou Li
- Children's Hospital and Department of Biophysics, NHC and CAMS Key Laboratory of Medical Neurobiology , Zhejiang University School of Medicine , Hangzhou , Zhejiang 310058 , China
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Abstract
Silica carriers equipped with molecular and supramolecular pH-sensitive nanovalves were designed by combination of sol-gel synthesis and selective postsynthetic modification. Mesoporous structure of synthesized materials was characterized by low-temperature nitrogen adsorption-desorption, small-angle X-ray diffraction and transmission electron microscopy. Chemical immobilization of N-[N'-(N'-phenyl)-2-aminophenyl]aminoalkyl groups was confirmed by IR spectral and chemical analyses of surface layer. Loading and release behaviour of synthesized drug carriers was studied in phosphate buffer solutions with pH 5.0 and pH 7.0 using doxorubicin (Dox) as a test molecule. It was found that the loading efficiency of synthesized materials determined by UV spectroscopy measurements reached 59-76%, whereas cumulative value of Dox released from silica materials equipped with molecular and supramolecular nanovalves into the phosphate buffer solution with pH 5.0 reached up to 48% and 51%, respectively. It was proved that aromatic amino groups and surface supramolecular structures localized near pore openings play an essential role in pH-controlled Dox release.
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Affiliation(s)
- N. V. Roik
- Chuiko Institute of Surface Chemistry of NAS of Ukraine, 17 General Naumov Street, Kyiv 03164, Ukraine
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Bavi N, Bavi O, Vossoughi M, Naghdabadi R, Hill AP, Martinac B, Jamali Y. Nanomechanical properties of MscL α helices: A steered molecular dynamics study. Channels (Austin) 2016; 11:209-223. [PMID: 27753526 DOI: 10.1080/19336950.2016.1249077] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
Gating of mechanosensitive (MS) channels is driven by a hierarchical cascade of movements and deformations of transmembrane helices in response to bilayer tension. Determining the intrinsic mechanical properties of the individual transmembrane helices is therefore central to understanding the intricacies of the gating mechanism of MS channels. We used a constant-force steered molecular dynamics (SMD) approach to perform unidirectional pulling tests on all the helices of MscL in M. tuberculosis and E. coli homologs. Using this method, we could overcome the issues encountered with the commonly used constant-velocity SMD simulations, such as low mechanical stability of the helix during stretching and high dependency of the elastic properties on the pulling rate. We estimated Young's moduli of the α-helices of MscL to vary between 0.2 and 12.5 GPa with TM2 helix being the stiffest. We also studied the effect of water on the properties of the pore-lining TM1 helix. In the absence of water, this helix exhibited a much stiffer response. By monitoring the number of hydrogen bonds, it appears that water acts like a 'lubricant' (softener) during TM1 helix elongation. These data shed light on another physical aspect underlying hydrophobic gating of MS channels, in particular MscL.
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Affiliation(s)
- N Bavi
- a Division of Molecular Cardiology and Biophysics , Victor Chang Cardiac Research Institute , Darlinghurst , NSW , Australia.,b St Vincent's Clinical School, Faculty of Medicine , University of New South Wales , Darlinghurst , NSW , Australia
| | - O Bavi
- c Institute for Nanoscience and Nanotechnology, Sharif University of Technology , Tehran , Iran
| | - M Vossoughi
- c Institute for Nanoscience and Nanotechnology, Sharif University of Technology , Tehran , Iran.,d Biochemical & Bioenvironmental Research Center (BBRC) , Tehran , Iran
| | - R Naghdabadi
- c Institute for Nanoscience and Nanotechnology, Sharif University of Technology , Tehran , Iran.,e Department of Mechanical Engineering , Sharif University of Technology , Tehran , Iran
| | - A P Hill
- a Division of Molecular Cardiology and Biophysics , Victor Chang Cardiac Research Institute , Darlinghurst , NSW , Australia
| | - B Martinac
- a Division of Molecular Cardiology and Biophysics , Victor Chang Cardiac Research Institute , Darlinghurst , NSW , Australia.,b St Vincent's Clinical School, Faculty of Medicine , University of New South Wales , Darlinghurst , NSW , Australia
| | - Y Jamali
- f Department of Mathematics , Tarbiat Modares University , Tehran , Iran.,g Computational Physical Sciences Research Laboratory , School of Nanoscience, Institute for Research in Fundamental Sciences (IPM) , Tehran , Iran
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7
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Abstract
The mechanosensitive channel of large conductance, MscL, has been proposed as a triggered nanovalve to be used in drug release and other nanodevices. It is a small homopentameric bacterial protein that has the largest gated pore known: greater than 30 Å. Large molecules, even small proteins can be released through MscL. Although MscL normally gates in response to membrane tension, early studies found that hydrophilic or charged residue substitutions near the constriction of the channel leads to pore opening. Researchers have successfully changed the modality of MscL to open to stimuli such as light by chemically modifying a single residue, G22, within the MscL pore. Here, by utilizing in vivo, liposome efflux, and patch clamp assays we compared modification of G22 with that of another neighboring residue, G26, and demonstrate that modifying G26 may be a better choice for triggered nanovalves used for triggered vesicular release of compounds.
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Abstract
The synthesis and host-guest chemistry of pillararene (PA) derivatives are a hot research topic, and the applications of PAs in relevant research fields are essential to explore. Carboxylate-substituted pillar[6]arene (CPA[6])-valved mesoporous silica nanoparticles (MSNs) functionalized with dimethylbenzimidazolium (DMBI) and bipyridinium (BP) stalks were constructed, respectively, for multiresponsive controlled release. CPA[6] encircled the DMBI or BP stalks to develop supramolecular nanovalves for encapsulation of cargo within the MSN pores. The release of cargo was triggered by acidic pH or competitive binding for the dethreading of CPA[6] and the opening of the nanovalves; moreover, coordination chemistry is the first strategy to activate CPA nanovalves by metal chelating with the carboxylate groups of CPA for cargo release. The controlled release of the CPA[6]-valved MSN delivery systems can meet diverse requirements and has promising biological applications in targeted drug therapy.
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Affiliation(s)
- Xuan Huang
- Key Laboratory of Mesoscopic Chemistry (Ministry of Education), State Key Laboratory of Coordination Chemistry, and School of Chemistry and Chemical Engineering, Nanjing University , Nanjing, Jiangsu 210093, People's Republic of China
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Abstract
In everyday life, a macroscopic valve is a device with a movable control element that regulates the flow of gases or liquids by blocking and opening passageways. Construction of such a device on the nanoscale level requires (i) suitably proportioned movable control elements, (ii) a method for operating them on demand, and (iii) appropriately sized passageways. These three conditions can be fulfilled by attaching organic, mechanically interlocked, linear motor molecules that can be operated under chemical, electrical, or optical stimuli to stable inorganic porous frameworks (i.e., by self-assembling organic machinery on top of an inorganic chassis). In this article, we demonstrate a reversibly operating nanovalve that can be turned on and off by redox chemistry. It traps and releases molecules from a maze of nanoscopic passageways in silica by controlling the operation of redox-activated bistable [2]rotaxane molecules tethered to the openings of nanopores leading out of a nanoscale reservoir.
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Affiliation(s)
- Thoi D Nguyen
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, 405 Hilgard Avenue, Los Angeles, CA 90095, USA
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