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Low-intensity focused ultrasound-assisted dox-piperine amplified therapy on anaplastic thyroid carcinoma by hybird tumor-targeting nanoparticles. J Drug Deliv Sci Technol 2023. [DOI: 10.1016/j.jddst.2023.104202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Mordovina EA, Plastun VO, Abdurashitov AS, Proshin PI, Raikova SV, Bratashov DN, Inozemtseva OA, Goryacheva IY, Sukhorukov GB, Sindeeva OA. "Smart" Polylactic Acid Films with Ceftriaxone Loaded Microchamber Arrays for Personalized Antibiotic Therapy. Pharmaceutics 2021; 14:pharmaceutics14010042. [PMID: 35056938 PMCID: PMC8781070 DOI: 10.3390/pharmaceutics14010042] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/17/2021] [Accepted: 12/21/2021] [Indexed: 11/24/2022] Open
Abstract
Bacterial infections are a severe medical problem, especially in traumatology, orthopedics, and surgery. The local use of antibiotics-elution materials has made it possible to increase the effectiveness of acute infections treatment. However, the infection prevention problem remains unresolved. Here, we demonstrate the fabrication of polylactic acid (PLA) “smart” films with microchamber arrays. These microchambers contain ceftriaxone as a payload in concentrations ranging from 12 ± 1 μg/cm2 to 38 ± 8 μg/cm2, depending on the patterned film thickness formed by the different PLA concentrations in chloroform. In addition, the release profile of the antibiotic can be prolonged up to 72 h in saline. At the same time, on the surface of agar plates, the antibiotic release time increases up to 96 h, which has been confirmed by the growth suppression of the Staphylococcus aureus bacteria. The efficient loading and optimal release rate are obtained for patterned films formed by the 1.5 wt % PLA in chloroform. The films produced from 1.5 and 2 wt % PLA solutions (thickness—0.42 ± 0.12 and 0.68 ± 0.16 µm, respectively) show an accelerated ceftriaxone release upon the trigger of the therapeutic ultrasound, which impacted as an expansion of the bacterial growth inhibition zone around the samples. Combining prolonged drug elution with the on-demand release ability of large cargo amount opens up new approaches for personalized and custom-tunable antibacterial therapy.
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Affiliation(s)
- Ekaterina A. Mordovina
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (V.O.P.); (D.N.B.); (O.A.I.); (I.Y.G.)
- Correspondence: (E.A.M.); (O.A.S.)
| | - Valentina O. Plastun
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (V.O.P.); (D.N.B.); (O.A.I.); (I.Y.G.)
| | - Arkady S. Abdurashitov
- Center for Neurobiology and Brain Restoration, Skolkovo Institute of Science and Technology, 3 Nobel Str., 143005 Moscow, Russia; (A.S.A.); (P.I.P.); (G.B.S.)
| | - Pavel I. Proshin
- Center for Neurobiology and Brain Restoration, Skolkovo Institute of Science and Technology, 3 Nobel Str., 143005 Moscow, Russia; (A.S.A.); (P.I.P.); (G.B.S.)
| | - Svetlana V. Raikova
- Saratov Hygiene Medical Research Center of the FBSI «FSC Medical and Preventive Health Risk Management Technologies», 1A Zarechnaya Str., 410022 Saratov, Russia;
- Department of Microbiology, Virology, and Immunology, Saratov State Medical University, 112 Bolshaya Kazachia Str., 410012 Saratov, Russia
| | - Daniil N. Bratashov
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (V.O.P.); (D.N.B.); (O.A.I.); (I.Y.G.)
| | - Olga A. Inozemtseva
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (V.O.P.); (D.N.B.); (O.A.I.); (I.Y.G.)
| | - Irina Yu. Goryacheva
- Science Medical Center, Saratov State University, 83 Astrakhanskaya Str., 410012 Saratov, Russia; (V.O.P.); (D.N.B.); (O.A.I.); (I.Y.G.)
| | - Gleb B. Sukhorukov
- Center for Neurobiology and Brain Restoration, Skolkovo Institute of Science and Technology, 3 Nobel Str., 143005 Moscow, Russia; (A.S.A.); (P.I.P.); (G.B.S.)
- School of Engineering and Materials Science, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Olga A. Sindeeva
- Center for Neurobiology and Brain Restoration, Skolkovo Institute of Science and Technology, 3 Nobel Str., 143005 Moscow, Russia; (A.S.A.); (P.I.P.); (G.B.S.)
- Correspondence: (E.A.M.); (O.A.S.)
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Yang M, Zeng Q, Wang Y, Qin J, Zheng J, Wa W. Effect of ultrasound pretreatment on the physicochemical properties and simulated gastrointestinal digestibility of micellar casein concentrates. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110319] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Zhang Z, Bai G, Xu D, Cao Y. Effects of ultrasound on the kinetics and thermodynamics properties of papain entrapped in modified gelatin. Food Hydrocoll 2020. [DOI: 10.1016/j.foodhyd.2020.105757] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Wang X, Majzoobi M, Farahnaky A. Ultrasound-assisted modification of functional properties and biological activity of biopolymers: A review. ULTRASONICS SONOCHEMISTRY 2020; 65:105057. [PMID: 32172150 DOI: 10.1016/j.ultsonch.2020.105057] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/15/2020] [Accepted: 03/06/2020] [Indexed: 05/10/2023]
Abstract
In this review, the recent applications of power ultrasound technology in improving the functional properties and biological activities of biopolymers are reviewed. The basic principles of ultrasonic technology are briefly introduced, and its main effects on gelling, structural, textural, emulsifying, rheological properties, solubility, thermal stability, foaming ability and foaming stability and biological activity are illustrated with examples reviewing the latest published research papers. Many positive effects of ultrasound treatment on these functional properties of biopolymers have been confirmed. However, the effectiveness of power ultrasound in improving biopolymers properties depends on a variety of factors, including frequency, intensity, duration, system temperature, and intrinsic properties of biopolymers such as macromolecular structure. In order to obtain the desired outcomes, it is best to apply optimized ultrasound processing parameters and use the best conditions in terms of frequency, amplitude, temperature, time, pH, concentration and ionic strength related to the inherent characteristics of each biopolymer. This will help employ the full potential of ultrasound technology for generating innovative biopolymers functionalities for various applications such as food, pharmaceuticals, and other industries.
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Affiliation(s)
- Xiaomei Wang
- Faculty of Science, Xi'an Aeronautical University, Xi'an, China
| | - Mahsa Majzoobi
- Biosciences and Food Technology, School of Science, RMIT University, Bundoora West Campus, Melbourne, Victoria 3083, Australia
| | - Asgar Farahnaky
- Biosciences and Food Technology, School of Science, RMIT University, Bundoora West Campus, Melbourne, Victoria 3083, Australia.
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Ultrasound-assisted catalyst-free phenol-yne reaction for the synthesis of new water-soluble chitosan derivatives and their nanoparticles with enhanced antibacterial properties. Int J Biol Macromol 2019; 139:103-113. [DOI: 10.1016/j.ijbiomac.2019.07.203] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 07/24/2019] [Accepted: 07/29/2019] [Indexed: 01/10/2023]
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Hu Y, Yang M, Huang H, Shen Y, Liu H, Chen X. Controlled Ultrasound Erosion for Transdermal Delivery and Hepatitis B Immunization. ULTRASOUND IN MEDICINE & BIOLOGY 2019; 45:1208-1220. [PMID: 30803825 DOI: 10.1016/j.ultrasmedbio.2019.01.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 01/05/2019] [Accepted: 01/15/2019] [Indexed: 06/09/2023]
Abstract
Although ultrasound is effective for transdermal delivery, it remains difficult to control the position, shape and size of localized skin transport regions. We developed an ultrasound erosion protocol to generate a single-site, circular delivery region with controlled size at the center of patched skin. We found that (i) shorter ultrasound pulses (25 cycles) with higher pulse repetition frequency (4 kHz) and higher peak negative pressure (17.0 MPa) resulted in larger (0.995 mm2) and deeper (∼300 µm) skin delivery regions with a higher success rate (94.44%); and (ii) temperature elevation of the skin increased with ultrasound exposure time, with a 30-s safety threshold. Furthermore, we found that hair follicles decreased the delivery controllability of ultrasound erosion. Therefore, we selected the skin of the hind legs of mice without dense hair follicles to deliver more than 1 μL of vaccine solution and successfully elicit immune responses against hepatitis B surface antigen.
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Affiliation(s)
- Yaxin Hu
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China; National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen, China
| | - Mei Yang
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China; National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen, China
| | - Haoqiang Huang
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China; National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen, China
| | - Yuanyuan Shen
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China; National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen, China
| | - Haitao Liu
- Vaccine Research Department, Shenzhen Kangtai Biological Products Company Ltd., Shenzhen, China
| | - Xin Chen
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen, China; National-Regional Key Technology Engineering Laboratory for Medical Ultrasound, Shenzhen, China.
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Wang D, Lv R, Ma X, Zou M, Wang W, Yan L, Ding T, Ye X, Liu D. Lysozyme immobilization on the calcium alginate film under sonication: Development of an antimicrobial film. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2018.04.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Ma X, Wang D, Yin M, Lucente J, Wang W, Ding T, Ye X, Liu D. Characteristics of pectinase treated with ultrasound both during and after the immobilization process. ULTRASONICS SONOCHEMISTRY 2017; 36:1-10. [PMID: 28069187 DOI: 10.1016/j.ultsonch.2016.10.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 10/28/2016] [Accepted: 10/28/2016] [Indexed: 06/06/2023]
Abstract
In this study, ultrasound was applied both during and after the immobilization process and characteristics of different immobilized pectinase samples were studied. When introduced during the immobilization process, ultrasound at an intensity of 9WmL-1 for 20min increased the immobilization yield 92.28% more than the control. When introduced to the already immobilized pectinase, ultrasound at an intensity of 4.5WmL-1 for 10min increased the pectinase activity by 30.05%. Results of scanning electron microscope demonstrated that ultrasound increased surface area and loosened structures of immobilized enzymes. Higher Vmax and lower Km were obtained after ultrasound treatment, indicating the increased catalytic efficiency and enhanced affinity of immobilized pectinase. Furthermore, the optimum temperature and pH for free and immobilized pectinase remained unchanged at 50°C and pH 4. Thermostability, reaction stability and reusability of two ultrasound-treated pectinase enzymes slightly decreased due to structural matrix changes.
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Affiliation(s)
- Xiaobin Ma
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Danli Wang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Michelle Yin
- Department of Food Science, University of Illinois at Urbana-Chanpaign, Urbana 61801, United States
| | - Juliet Lucente
- Department of Food Science, University of Illinois at Urbana-Chanpaign, Urbana 61801, United States
| | - Wenjun Wang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Tian Ding
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R&D Center for Food Technology and Equipment, Hangzhou 310058, China
| | - Xingqian Ye
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R&D Center for Food Technology and Equipment, Hangzhou 310058, China
| | - Donghong Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R&D Center for Food Technology and Equipment, Hangzhou 310058, China.
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Feng L, Cao Y, Xu D, Zhang D, Huang Z. Influence of chitosan-sodium alginate pretreated with ultrasound on the enzyme activity, viscosity and structure of papain. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:1561-1566. [PMID: 27405733 DOI: 10.1002/jsfa.7901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2016] [Revised: 06/24/2016] [Accepted: 07/08/2016] [Indexed: 06/06/2023]
Abstract
BACKGROUND Ultrasound treatment has been shown to be an effective technique for improving the activity of immobilized enzymes. However, its mechanism is unclear. RESULTS The effect of ultrasonic pretreated chitosan-sodium alginate (CHI-ALG) on the enzymatic activity of papain was investigated via a single factor (temperature, time, frequency, power) experiment. The maximum relative enzyme activity of papain was observed when it was mixed with ultrasound pretreated CHI-ALG at 135 kHz, 0.25 W cm-2 and 50 °C for 20 min, during which the relative activity increased by 72.14% compared to untreated CHI-ALG. Viscosity analysis of papain mixed with CHI-ALG pretreated and untreated with ultrasound revealed that stronger association interactions between the polymers were formed compared to the untreated sample. Fluorescence and circular dichroism spectra indicated that the ultrasonic pretreatment of CHI-ALG increased the number of tryptophan on the papain surface and also increased the content of α-helix by 6.97% and decreased the content of β-sheet by 3.45% compared to the untreated solution. CONCLUSION The results of the present study indicate that papain combined with CHI-ALG pretreated with the appropriate ultrasound could be effective technique for improving the activity of immobilized enzymes as a result of changes in its structure and intermolecular interactions. It is important to extend the application of CHI-ALG gel in the immobilized enzyme industry. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Liping Feng
- Beijing Advanced Innovation Center for Food Nutrition and Human Health (BTBU), School of Food and Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Laboratory for Food Quality and Safety, Beijing Technology and Business University, Beijing, 100048, China
| | - Yanping Cao
- Beijing Advanced Innovation Center for Food Nutrition and Human Health (BTBU), School of Food and Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Laboratory for Food Quality and Safety, Beijing Technology and Business University, Beijing, 100048, China
| | - Duoxia Xu
- Beijing Advanced Innovation Center for Food Nutrition and Human Health (BTBU), School of Food and Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Laboratory for Food Quality and Safety, Beijing Technology and Business University, Beijing, 100048, China
| | - Dandan Zhang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health (BTBU), School of Food and Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Laboratory for Food Quality and Safety, Beijing Technology and Business University, Beijing, 100048, China
| | - Zhenghua Huang
- Beijing Advanced Innovation Center for Food Nutrition and Human Health (BTBU), School of Food and Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology and Business University, Beijing, 100048, China
- Beijing Laboratory for Food Quality and Safety, Beijing Technology and Business University, Beijing, 100048, China
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Feng L, Cao Y, Xu D, Wang S, Zhang J. Molecular weight distribution, rheological property and structural changes of sodium alginate induced by ultrasound. ULTRASONICS SONOCHEMISTRY 2017; 34:609-615. [PMID: 27773287 DOI: 10.1016/j.ultsonch.2016.06.038] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Revised: 06/25/2016] [Accepted: 06/25/2016] [Indexed: 06/06/2023]
Abstract
In this study, the effects of ultrasound with different ultrasonic frequencies on the properties of sodium alginate (ALG) were investigated, which were characterized by the means of the multi-angle laser light scattering photometer analysis (GPC-MALLS), rheological analysis, circular dichroism (CD) spectrometer and scanning electron microscope (SEM). It showed that the molecular weight (Mw) and molecular number (Mn) of the untreated ALG was 1.927×105g/mol and 4.852×104g/mol, respectively. The Mw of the ultrasound treated ALG was gradually increased from 3.50×104g/mol to 7.34×104g/mol while the Mn of ALG was increased and then decreased with the increase of the ultrasonic frequency. The maximum value of Mn was 9.988×104g/mol when the ALG was treated by ultrasound at 40kHz. It indicated that ultrasound could induce ALG degradation and rearrangement. The number of the large molecules and small molecules of ALG was changed by ultrasound. The value of dn/dc suggested that the ultrasound could enhance the stability of ALG. Furthermore, it was found that ALG treated by ultrasound at 50kHz tended to be closer to a Newtonian behavior, while the untreated and treated ALG solutions exhibited pseudoplastic behaviours. Moreover, CD spectra demonstrated that ultrasound could be used to improve the strength of the gel by changing the ratio of M/G, which showed that the minimum ratio of M/G of ALG treated at 135kHz was 1.34. The gel-forming capacity of ALG was correlated with the content of G-blocks. It suggested that ALG treated by ultrasound at 135kHz was stiffer in the process of forming gels. The morphology results indicated that ultrasound treatment of ALG at 135kHz increased its hydrophobic interaction and interfacial activity. This study is important to explore the effect of ultrasound on ALG in improving the physical properties of ALG as food additives, enzyme and drug carriers.
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Affiliation(s)
- Liping Feng
- Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), School of Food & Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China
| | - Yanping Cao
- Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), School of Food & Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China.
| | - Duoxia Xu
- Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), School of Food & Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China
| | - Shaojia Wang
- Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), School of Food & Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China
| | - Jie Zhang
- Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), School of Food & Chemical Engineering, Beijing Engineering and Technology Research Center of Food Additives, Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China
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Feng L, Cao Y, Xu D, You S, Han F. Influence of sodium alginate pretreated by ultrasound on papain properties: Activity, structure, conformation and molecular weight and distribution. ULTRASONICS SONOCHEMISTRY 2016; 32:224-230. [PMID: 27150765 DOI: 10.1016/j.ultsonch.2016.03.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Revised: 03/14/2016] [Accepted: 03/15/2016] [Indexed: 05/24/2023]
Abstract
The aim of the study was to investigate the impact of sodium alginate (ALG) pretreated by ultrasound on the enzyme activity, structure, conformation and molecular weight and distribution of papain. ALG solutions were pretreated with ultrasound at varying power (0.05, 0.15, 0.25, 0.35, 0.45W/cm(2)), 135kHz, 50°C for 20min. The maximum relative activity of papain increased by 10.53% when mixed with ALG pretreated by ultrasound at 0.25W/cm(2), compared with the untreated ALG. The influence of ultrasound pretreated ALG on the conformation and secondary structure of papain were assessed by fluorescence spectroscopy and circular dichroism spectroscopy. The fluorescence spectra revealed that ultrasound pretreated ALG increased the number of tryptophan on papain surface, especially at 0.25W/cm(2). It indicated that ultrasound pretreatment induced molecular unfolding, causing the exposure of more hydrophobic groups and regions from inside to the outside of the papain molecules. Furthermore, ultrasound pretreated ALG resulted in minor changes in the secondary structure of the papain. The content of α-helix was slightly increased after ultrasound pretreatment and no significant change was observed at different ultrasound powers. ALG pretreated by ultrasound enhanced the stability of the secondary structure of papain, especially at 0.25W/cm(2). The free sulfhydryl (SH) content of papain was slightly increased and then decreased with the increase of ultrasonic power. The maximum content of free SH was observed at 0.25W/cm(2), under which the content of the free SH increased by 6.36% compared with the untreated ALG. Dynamic light scattering showed that the effect of ultrasound treatment was mainly the homogenization of the ALG particles in the mixed dispersion. The gel permeation chromatography coupled with the multi-angle laser light scattering photometer analysis showed that the molecular weight (Mw) of papain/ALG was decreased and then increased with the ultrasonic pretreatment. Results demonstrated that the activity of immobilized papain improved by ultrasonic pretreatment was mainly caused by the variation of the conformation of papain and the effect of interactions between papain and ALG. This study is important to explain the intermolecular interactions of biopolymers and the mechanism of enzyme immobilization treated by ultrasound in improving the enzymatic activity. As expected, ALG pretreated by appropriate ultrasound is promising as a bioactive compound carrier in the field of immobilized enzyme.
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Affiliation(s)
- Liping Feng
- School of Food & Chemical Engineering, Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University, Beijing 100048, China; Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology & Business University, Beijing 100048, China; Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China
| | - Yanping Cao
- School of Food & Chemical Engineering, Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University, Beijing 100048, China; Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology & Business University, Beijing 100048, China; Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China.
| | - Duoxia Xu
- School of Food & Chemical Engineering, Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University, Beijing 100048, China; Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology & Business University, Beijing 100048, China; Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China
| | - Sasa You
- School of Food & Chemical Engineering, Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University, Beijing 100048, China; Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology & Business University, Beijing 100048, China; Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China
| | - Fu Han
- School of Food & Chemical Engineering, Beijing Advanced Innovation Center for Food Nutrition & Human Health (BTBU), Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University, Beijing 100048, China; Beijing Higher Institution Engineering Research Center of Food Additives and Ingredients, Beijing Key Laboratory of Flavor Chemistry, Beijing Technology & Business University, Beijing 100048, China; Beijing Laboratory for Food Quality and Safety, Beijing Technology & Business University, Beijing 100048, China
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