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Chen Y, Chen B, Dong J, Yang D, Tang H, Wen L, Li J, Huang L, Zhou J. A tough and bioadhesive injectable hydrogel formed with maleimidyl alginate and pristine gelatin. Carbohydr Polym 2024; 334:122011. [PMID: 38553212 DOI: 10.1016/j.carbpol.2024.122011] [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: 11/17/2023] [Revised: 02/01/2024] [Accepted: 02/29/2024] [Indexed: 04/02/2024]
Abstract
Injectable hydrogels have wide applications in clinical practice. However, the development of tough and bioadhesive ones based on biopolymers, along with biofriendly and robust crosslinking strategies, still represents a great challenge. Herein, we report an injectable hydrogel composed of maleimidyl alginate and pristine gelatin, for which the precursor solutions could self-crosslink via mild Michael-type addition without any catalyst or external energy upon mixing. This hydrogel is tough and bioadhesive, which can maintain intactness as well as adherence to the defect of porcine skin under fierce bending and twisting, warm water bath, and boiling water shower. Besides, it is biocompatible, bioactive and biodegradable, which could support the growth and remodeling of cells by affording an extracellular matrix-like environment. As a proof of application, we demonstrate that this hydrogel could significantly accelerate diabetic skin wound healing, thereby holding great potential in healthcare.
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Affiliation(s)
- Yin Chen
- School of Biomedical Engineering, Guangzhou Medical University, Guangzhou 511436, China; School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China
| | - Baiqi Chen
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China
| | - Jianpei Dong
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China
| | - Deyu Yang
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China
| | - Hao Tang
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China
| | - Lan Wen
- Department of Neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Jianshu Li
- School of Biomedical Engineering, Guangzhou Medical University, Guangzhou 511436, China; College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
| | - Lu Huang
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China.
| | - Jianhua Zhou
- School of Biomedical Engineering, Sun Yat-sen University, Shenzhen 518107, China.
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Aminoroaya A, Khorasani SN, Bagheri R, Talebi Z, Malekkhouyan R, Das O, Neisiany RE. Facile encapsulation of cyanoacrylate-based bioadhesive by electrospray method and investigation of the process parameters. Sci Rep 2024; 14:5389. [PMID: 38443417 PMCID: PMC10914717 DOI: 10.1038/s41598-024-56008-2] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 02/29/2024] [Indexed: 03/07/2024] Open
Abstract
Polymer microcapsules containing cyanoacrylates have represented a promising option to develop self-healing biomaterials. This study aims to develop an electrospray method for the preparation of capsules using poly(methyl methacrylate) (PMMA) as the encapsulant and ethyl 2-cyanoacrylate (EC) as the encapsulate. It also aims to study the effect of the electrospray process parameters on the size and morphology of the capsules. The capsules were characterized using Fourier-transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and field-emission scanning electron microscopy (FE-SEM). Moreover, the effects of electrospray process parameters on the size were investigated by Taguchi experimental design. FTIR and TGA approved the presence of both PMMA and EC without further reaction. FE-SEM micrograph demonstrated that an appropriate choice of solvents, utilizing an appropriate PMMA:EC ratio and sufficient PMMA concentration are critical factors to produce capsules dominantly with an intact and spherical morphology. Utilizing various flow rates (0.3-0.5 ml/h) and applied voltage (18-26 kV), capsules were obtained with a 600-1000 nm size range. At constantly applied voltages, the increase in flow rate increased the capsule size up to 40% (ANOVA, p ≤ 0.05), while at constant flow rates, the increase in applied voltage reduced the average capsule size by 3.4-26% (ANOVA, p ≤ 0.05). The results from the Taguchi design represented the significance of solution flow rate, applied voltage, and solution concentration. It was shown that the most effective parameter on the size of capsules is flow rate. This research demonstrated that electrospray can be utilized as a convenient method for the preparation of sub-micron PMMA capsules containing EC. Furthermore, the morphology of the capsules is dominated by solvents, PMMA concentration, and PMMA:EC ratio, while the average size of the capsules can be altered by adjusting the flow rate and applied voltage of the electrospray process.
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Affiliation(s)
- Alireza Aminoroaya
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
- Department of Chemical Engineering and Materials Science, Michigan State University, 428 S. Shaw Lane, East Lansing, MI, 48824, USA
| | - Saied Nouri Khorasani
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Rouholah Bagheri
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Zahra Talebi
- Department of Textile Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Roya Malekkhouyan
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Oisik Das
- Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187, Lulea, Sweden.
| | - Rasoul Esmaeely Neisiany
- Biotechnology Centre, Silesian University of Technology, Krzywoustego 8, 44-100, Gliwice, Poland.
- Department of Polymer Engineering, Hakim Sabzevari University, Sabzevar, 9617976487, Iran.
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Deore UV, Mahajan HS, Surana SJ, Joshi AA. Exploring film forming ability and improving its bioadhesiveness by thiolation of mucilaginous polysaccharides from Cassia uniflora seeds for drug delivery application. Int J Biol Macromol 2024; 260:129500. [PMID: 38242397 DOI: 10.1016/j.ijbiomac.2024.129500] [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: 08/08/2023] [Revised: 12/09/2023] [Accepted: 01/12/2024] [Indexed: 01/21/2024]
Abstract
The objectives of the present work were to explore film forming ability of mucilaginous polysaccharides obtained from Cassia uniflora seeds and improving its bioadhesive potential by thiolation for drug delivery and other applications. Thiolation was achieved by esterification reaction with thioglycolic acid. The modification was confirmed by performing and comparing its zeta potential, DSC, and spectrophotometric characterization by FTIR and NMR with unmodified mucilaginous polysaccharide. The modified mucilaginous polysaccharides FTIR spectra showed an additional absorption band at 2565 cm-1 and new shifts appeared in the 1H (δ 3.24 and at δ 3.44 ppm) and 13C NMR spectra's (21.56 ppm) confirming the esterification of mucilaginous polysaccharides. The prepared films of thiolated and unmodified mucilaginous polysaccharides were evaluated for various parameters like thickness, pH, and weight measurement, The film formulation had a thickness of 0.16 to 0.18 mm, pH in the range of 6.79 to 7.09 and weight uniformity 0.89 to 0.94 mg. The results reveal that the films based on thiolated material improved bioadhesive properties after thiolation. The SEM photographs revealed a smooth surface of film formulations. The diclofenac-loaded film of thiolated mucilaginous polysaccharide also showed >1.5-fold an increase in in-vitro drug release and exhibited non Fickian transport mechanism. These findings could increase the possible applications of chemically modified-thiolated mucilaginous polysaccharides of Cassia uniflora seeds in drug delivery.
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Affiliation(s)
- Ujwaldip V Deore
- R. C. Patel Institute of Pharmaceutical Education & Research, Near Karvand Naka, Shirpur, 425405 Dist: Dhule, Maharashtra, India.
| | - Hitendra S Mahajan
- R. C. Patel Institute of Pharmaceutical Education & Research, Near Karvand Naka, Shirpur, 425405 Dist: Dhule, Maharashtra, India
| | - Sanjay J Surana
- R. C. Patel Institute of Pharmaceutical Education & Research, Near Karvand Naka, Shirpur, 425405 Dist: Dhule, Maharashtra, India
| | - Amol A Joshi
- ASPM's K. T. Patil College of Pharmacy, Siddarth Nagar, Barshi Road, Dist: Osmanabad 413501, India
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Liu Y, Zhao C, Song C, Shen X, Wang F, Zhang Y, Ma Y, Ding X. A mussel inspired polyvinyl alcohol/collagen/tannic acid bioadhesive for wet adhesion and hemostasis. Colloids Surf B Biointerfaces 2024; 235:113766. [PMID: 38278032 DOI: 10.1016/j.colsurfb.2024.113766] [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: 12/11/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 01/28/2024]
Abstract
Bioadhesives are useful in surgery for hemostasis, tissue sealing and wound healing. However, most bioadhesives have limitations such as weak adhesion in wet conditions, insufficient sealing and poor clotting performance. Inspired by the adhesion mechanism of marine mussels, a novel bioadhesive (PCT) was developed by simply combining polyvinyl alcohol (PVA), collagen (COL) and tannic acid (TA) together. The results showed that the adhesion, sealing and blood coagulation properties boosted with the increase of tannic acid content in PCT. The wet shear adhesion strength of PCT-5 (the weight ratio of PVA:COL:TA=1:1:5) was 60.8 ± 0.6 kPa, the burst pressure was 213.7 ± 0.7 mmHg, and the blood clotting index was 39.3% ± 0.6%, respectively. In rat heart hemostasis tests, PCT-5 stopped bleeding in 23.7 ± 3.2 s and reduced bleeding loss to 83.0 ± 19.1 mg, which outperformed the benchmarks of commercial gauze (53.3 ± 8.7 s and 483.0 ± 15.0 mg) and 3 M adhesive (Type No.1469SB, 35.3 ± 5.0 s and 264.0 ± 14.2 mg). The as-prepared bioadhesive could provide significant benefits for tissue sealing and hemorrhage control along its low cost and facile preparation process.
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Affiliation(s)
- Ying Liu
- Key Laboratory of Biomedical Materials of Natural Macromolecules, Beijing University of Chemical Technology, Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Chenyu Zhao
- National Institutes for Food and Drug Control, Beijing 102629 China
| | - Changtong Song
- Key Laboratory of Biomedical Materials of Natural Macromolecules, Beijing University of Chemical Technology, Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiao Shen
- Center of Stomatology, China-Japan Friendship Hospital, Beijing 100029, China
| | - Fengji Wang
- Key Laboratory of Biomedical Materials of Natural Macromolecules, Beijing University of Chemical Technology, Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yisong Zhang
- Key Laboratory of Biomedical Materials of Natural Macromolecules, Beijing University of Chemical Technology, Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China
| | - Yuhong Ma
- Key Laboratory of Biomedical Materials of Natural Macromolecules, Beijing University of Chemical Technology, Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xuejia Ding
- Key Laboratory of Biomedical Materials of Natural Macromolecules, Beijing University of Chemical Technology, Ministry of Education, Beijing 100029, China; Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, China.
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Monier M, Nuez I, Borne F, Courtier-Orgogozo V. Higher evolutionary dynamics of gene copy number for Drosophila glue genes located near short repeat sequences. BMC Ecol Evol 2024; 24:18. [PMID: 38308233 PMCID: PMC10835880 DOI: 10.1186/s12862-023-02178-y] [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: 01/19/2023] [Accepted: 11/23/2023] [Indexed: 02/04/2024] Open
Abstract
BACKGROUND During evolution, genes can experience duplications, losses, inversions and gene conversions. Why certain genes are more dynamic than others is poorly understood. Here we examine how several Sgs genes encoding glue proteins, which make up a bioadhesive that sticks the animal during metamorphosis, have evolved in Drosophila species. RESULTS We examined high-quality genome assemblies of 24 Drosophila species to study the evolutionary dynamics of four glue genes that are present in D. melanogaster and are part of the same gene family - Sgs1, Sgs3, Sgs7 and Sgs8 - across approximately 30 millions of years. We annotated a total of 102 Sgs genes and grouped them into 4 subfamilies. We present here a new nomenclature for these Sgs genes based on protein sequence conservation, genomic location and presence/absence of internal repeats. Two types of glue genes were uncovered. The first category (Sgs1, Sgs3x, Sgs3e) showed a few gene losses but no duplication, no local inversion and no gene conversion. The second group (Sgs3b, Sgs7, Sgs8) exhibited multiple events of gene losses, gene duplications, local inversions and gene conversions. Our data suggest that the presence of short "new glue" genes near the genes of the latter group may have accelerated their dynamics. CONCLUSIONS Our comparative analysis suggests that the evolutionary dynamics of glue genes is influenced by genomic context. Our molecular, phylogenetic and comparative analysis of the four glue genes Sgs1, Sgs3, Sgs7 and Sgs8 provides the foundation for investigating the role of the various glue genes during Drosophila life.
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Affiliation(s)
- Manon Monier
- Université Paris Cité, CNRS, Institut Jacques Monod, 75013, Paris, France
| | - Isabelle Nuez
- Université Paris Cité, CNRS, Institut Jacques Monod, 75013, Paris, France
| | - Flora Borne
- Université Paris Cité, CNRS, Institut Jacques Monod, 75013, Paris, France
- Department of Biological Sciences, Columbia University, New York city, New York, USA
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Ma H, Hou J, Xiao X, Wan R, Ge G, Zheng W, Chen C, Cao J, Wang J, Liu C, Zhao Q, Zhang Z, Jiang P, Chen S, Xiong W, Xu J, Lu B. Self-healing electrical bioadhesive interface for electrophysiology recording. J Colloid Interface Sci 2024; 654:639-648. [PMID: 37864869 DOI: 10.1016/j.jcis.2023.09.190] [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: 06/08/2023] [Revised: 09/01/2023] [Accepted: 09/30/2023] [Indexed: 10/23/2023]
Abstract
Electrical bioadhesive interfaces (EBIs) are standing out in various applications, including medical diagnostics, prosthetic devices, rehabilitation, and human-machine interactions. Nonetheless, crafting a reliable and advanced EBI with comprehensive properties spanning electrochemical, electrical, mechanical, and self-healing capabilities remains a formidable challenge. Herein, we develop a self-healing EBI by thoughtfully integrating conducting polymer nanofibers and a typical bioadhesive within a robust hydrogel matrix. The accomplished EBI demonstrates extraordinary adhesion (lap shear strength of 197 kPa), exceptional electrical conductivity (2.18 S m-1), and outstanding self-healing performance. Taking advantage of these attributes, we integrated the EBI into flexible skin electrodes for surface electromyography (sEMG) signal recording from forearm muscles. The engineered skin electrodes exhibit robust adhesion to the skin even when sweating, rapid self-healing from damage, and seamless real-time signal recording with a higher signal-to-noise ratio (39 dB). Our EBI, along with its skin electrodes, offers a promising platform for tissue-device integration, health monitoring, and an array of bioelectronic applications.
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Affiliation(s)
- Hude Ma
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China; School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China
| | - Jingdan Hou
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China; School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China
| | - Xiao Xiao
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
| | - Rongtai Wan
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China; School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China
| | - Gang Ge
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
| | | | - Chen Chen
- State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Jie Cao
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China
| | - Jinye Wang
- Liaocheng Ecological Environment Monitoring Centre of Shandong Province, Liaocheng 252000, Shandong, China
| | - Chang Liu
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117583, Singapore
| | - Qi Zhao
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China; School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China
| | - Zhilin Zhang
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China; School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China
| | - Peng Jiang
- Xi'an Physical Education University, Xi'an 710068, Shaanxi, China
| | - Shuai Chen
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China
| | - Wenhui Xiong
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China; School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China
| | - Jingkun Xu
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China; School of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China
| | - Baoyang Lu
- Jiangxi Key Lab of Flexible Electronics, Flexible Electronics Innovation Institute, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China; School of Pharmacy, Jiangxi Science & Technology Normal University, Nanchang 330013, Jiangxi, China.
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Zhang Z, Cao Q, Xia Y, Cui C, Qi Y, Zhang Q, Wu Y, Liu J, Liu W. Combination of biodegradable hydrogel and antioxidant bioadhesive for treatment of breast cancer recurrence and radiation skin injury. Bioact Mater 2024; 31:408-421. [PMID: 37692912 PMCID: PMC10482898 DOI: 10.1016/j.bioactmat.2023.08.021] [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: 06/20/2023] [Revised: 08/08/2023] [Accepted: 08/28/2023] [Indexed: 09/12/2023] Open
Abstract
Postoperative radiotherapy is the standard method for inhibition of breast cancer recurrence and metastasis, whereas radiation resistant and ineluctable skin radiation injury are still key problems encountered in the prognosis of breast cancer. Herein, we design an internally implantable biodegradable hydrogel and extracutaneously applicable antioxidant bioadhesive to concurrently prevent postoperative tumor recurrence and radioactive skin injury after adjuvant radiotherapy. The biodegradable silk fibroin/perfluorocarbon hydrogel loading doxorubicin (DOX) formed by consecutive ultrasonication-induced β-sheets-crosslinked amphiphilic silk fibroin/perfluorocarbon/DOX nanoemulsion, exhibits continuous release of oxygen in physiological environment to improve hypoxia and sensitivity of radiotherapy, as well as simultaneous release of DOX to finally achieve effective anti-cancer effect. A stretchable bioadhesive is fabricated by copolymerization of α-thioctic acid and N, N-diacryloyl-l-lysine, and gold nanorods and gallic acid are loaded into the bioadhesive to afford gentle photothermal therapy and antioxidant functions. The near-infrared light-induced controlled release of gallic acid and mild photothermal therapy can efficiently eliminate excess free radicals generated by radiotherapy and promote radioactive wound healing. Ultimately, in vivo animal studies substantiate the efficacy of our methodology, wherein the post-tumor resection administration of hydrogel and concomitant application of an antioxidant bioadhesive patch effectively inhibit tumor recurrence and attenuate the progression of skin radiation damage.
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Affiliation(s)
- Zhuodan Zhang
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Qiannan Cao
- Key Laboratory of Radiopharmacokinetics for Innovative Drugs, Chinese Academy of Medical Sciences, Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Yi Xia
- Key Laboratory of Radiopharmacokinetics for Innovative Drugs, Chinese Academy of Medical Sciences, Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Chunyan Cui
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Ying Qi
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Qian Zhang
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
| | - Yuanhao Wu
- Key Laboratory of Radiopharmacokinetics for Innovative Drugs, Chinese Academy of Medical Sciences, Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Jianfeng Liu
- Key Laboratory of Radiopharmacokinetics for Innovative Drugs, Chinese Academy of Medical Sciences, Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Institute of Radiation Medicine, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, 300192, China
| | - Wenguang Liu
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, 300350, China
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Ahmadian Z, Jelodar MZ, Rashidipour M, Dadkhah M, Adhami V, Sefareshi S, Ebrahimi HA, Ghasemian M, Adeli M. A self-healable and bioadhesive acacia gum polysaccharide-based injectable hydrogel for wound healing acceleration. Daru 2023; 31:205-219. [PMID: 37610559 PMCID: PMC10624782 DOI: 10.1007/s40199-023-00475-x] [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: 01/18/2023] [Accepted: 07/30/2023] [Indexed: 08/24/2023] Open
Abstract
The present study aimed at developing an injectable hydrogel based on acacia gum (AG) for wound healing acceleration. The hydrogels were synthetized through metal-ligand coordination mediated by Fe3+ and characterized in terms of gelation time, gel content, initial water content, swelling capacity, water retention ratio, and porosity. Moreover, FTIR, XRD and TGA analyses were performed for the hydrogels and allantoin (Alla) loaded ones. Furthermore, bioadhessiveness, and self-healing as well as antibacterial, toxicity and wound healing potentials of the hydrogels were evaluated. The hydrogels displayed fast gelation time, high swelling, porosity, and bioadhessiveness, as well as antioxidant, self-healing, antibacterial, blood clotting, and injectability properties. FTIR, XRD and TGA analyses confirmed hydrogel synthesis and drug loading. The Alla-loaded hydrogels accelerated wound healing by decreasing the inflammation and increasing the cell proliferation as well as collagen deposition. Hemocompatibility, cell cytotoxicity, and in vivo toxicity experiments were indicative of a high biocompatibility level for the hydrogels. Given the advantages of fast gelation, injectability and beneficial biological properties, the use of Alla-loaded hydrogels could be considered a new remedy for efficient wound healing.
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Affiliation(s)
- Zainab Ahmadian
- Department of Pharmaceutics, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran.
- Department of Pharmaceutics, School of Pharmacy, Lorestan University of Medical Sciences, Khorramabad, Iran.
| | - Mahsa Zibanejad Jelodar
- Department of Pharmaceutics, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Marzieh Rashidipour
- Razi Herbal Medicines Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
- Environmental Health Research Center, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Masoumeh Dadkhah
- Pharmaceutical Sciences Research Center, Ardabil University of Medical Sciences, Ardabil, 5618985991, Iran
| | - Vahed Adhami
- Department of Pharmacology and Toxicology, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Sajjad Sefareshi
- Department of Pharmaceutics, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Hossein Ali Ebrahimi
- Department of Pharmaceutics, School of Pharmacy, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Motaleb Ghasemian
- Department of Medicinal Chemistry, School of Pharmacy, Lorestan University of Medical Sciences, Khorramabad, Iran
| | - Mohsen Adeli
- Institut für Chemieund Biochemie, Freie Universität Berlin, Takustr. 3, 14195, Berlin, Germany
- Department of Chemistry, Sharif University of Technology, Tehran, Iran
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Soubam T, Gupta A, Jamari SS. Eco-friendly bio-based adhesive for plywood from natural rubber latex (NRL)-blended isocyanate cross-linked starch. Environ Sci Pollut Res Int 2023; 30:124610-124618. [PMID: 35610450 DOI: 10.1007/s11356-022-20788-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
Synthetic adhesives used in the production of plywood are a matter of concern because of the emission of carcinogenic gas formaldehyde, increased environmental pollution, and the depletion of fossil fuels. In this study, a bioadhesive composed of natural rubber latex (NRL) and rice starch was developed. However, rice starch has low moisture resistance, resulting in low adhesion. Thus, to enhance the effectiveness of NRL-blended rice starch-based bioadhesive, rice starch was cross-linked with polymeric 4,4″-diphenylmethane diisocyanate (pMDI) resin, which is an environment-friendly, formaldehyde free, and moisture resistant that is highly compatible with starch. The chemical interaction, viscosity, solid content, and gel time of the developed NRL-isocyanate cross-linked rice starch-based bioadhesive was investigated. The efficacy of the formulated bioadhesive was demonstrated by the fabrication of plywood. The presence of isocyanate and urethane capabilities in the bioadhesive formulations was confirmed by Fourier transform infrared spectroscopy (FTIR). The bioadhesive type Iso-A was discovered to have the highest viscosity of 8270 mPa.s, whereas Iso-B has the shortest gel time of 3.46 min and the highest solid content of 44%; the higher solid content accelerates the gel time. In terms of physical and mechanical properties of plywood, Iso-B has the lowest thickness swelling (TS) value of 13%, lowest water absorption (WA) value of 52% and shear strength value of 1.92 MPa, which corresponds to the ISO 12466-2-2007 standard requirements. Based on the results, NRL-blended isocyanate starch-based bioadhesive could be a good potential raw material for eco-friendly plywood industries with adequate accuracy.
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Affiliation(s)
- Triveni Soubam
- Faculty of Chemical & Process Engineering Technology, Universiti Malaysia Pahang, 26300, Gambang, Pahang, Malaysia
| | - Arun Gupta
- Faculty of Chemical & Process Engineering Technology, Universiti Malaysia Pahang, 26300, Gambang, Pahang, Malaysia.
| | - Saidatul Shima Jamari
- Faculty of Chemical & Process Engineering Technology, Universiti Malaysia Pahang, 26300, Gambang, Pahang, Malaysia
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10
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Zheng Y, Baidya A, Annabi N. Molecular design of an ultra-strong tissue adhesive hydrogel with tunable multifunctionality. Bioact Mater 2023; 29:214-229. [PMID: 37520304 PMCID: PMC10372327 DOI: 10.1016/j.bioactmat.2023.06.007] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 05/15/2023] [Accepted: 06/08/2023] [Indexed: 08/01/2023] Open
Abstract
Designing adhesive hydrogels with optimal properties for the treatment of injured tissues is challenging due to the tradeoff between material stiffness and toughness while maintaining adherence to wet tissue surfaces. In most cases, bioadhesives with improved mechanical strength often lack an appropriate elastic compliance, hindering their application for sealing soft, elastic, and dynamic tissues. Here, we present a novel strategy for engineering tissue adhesives in which molecular building blocks are manipulated to allow for precise control and optimization of the various aforementioned properties without any tradeoffs. To introduce tunable mechanical properties and robust tissue adhesion, the hydrogel network presents different modes of covalent and noncovalent interactions using N-hydroxysuccinimide ester (NHS) conjugated alginate (Alg-NHS), poly (ethylene glycol) diacrylate (PEGDA), tannic acid (TA), and Fe3+ ions. Through combining and tuning different molecular interactions and a variety of crosslinking mechanisms, we were able to design an extremely elastic (924%) and tough (4697 kJ/m3) multifunctional hydrogel that could quickly adhere to wet tissue surfaces within 5 s of gentle pressing and deform to support physiological tissue function over time under wet conditions. While Alg-NHS provides covalent bonding with the tissue surfaces, the catechol moieties of TA molecules synergistically adopt a mussel-inspired adhesive mechanism to establish robust adherence to the wet tissue. The strong adhesion of the engineered bioadhesive patch is showcased by its application to rabbit conjunctiva and porcine cornea. Meanwhile, the engineered bioadhesive demonstrated painless detachable characteristics and in vitro biocompatibility. Additionally, due to the molecular interactions between TA and Fe3+, antioxidant and antibacterial properties required to support the wound healing pathways were also highlighted. Overall, by tuning various molecular interactions, we were able to develop a single-hydrogel platform with an "all-in-one" multifunctionality that can address current challenges of engineering hydrogel-based bioadhesives for tissue repair and sealing.
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Affiliation(s)
- Yuting Zheng
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, United States
| | - Avijit Baidya
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, United States
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, CA, 90095, United States
- Department of Bioengineering, University of California, Los Angeles, Los Angeles, CA, 90095, United States
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11
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Han J, Bhatta R, Wang H. Bio-adhesive Macroporous Hydrogels for In Situ Recruitment and Modulation of Dendritic Cells. Cell Mol Bioeng 2023; 16:355-367. [PMID: 37811000 PMCID: PMC10550891 DOI: 10.1007/s12195-023-00770-2] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 06/14/2023] [Indexed: 10/10/2023] Open
Abstract
Introduction Biomaterials that enable in situ recruitment and modulation of immune cells have demonstrated tremendous promise for developing potent cancer immunotherapy such as therapeutic cancer vaccine. One challenge related to biomaterial scaffold-based cancer vaccines is the development of macroporous materials that are biocompatible and stable, enable controlled release of chemokines to actively recruit a large number of dendritic cells (DCs), contain macropores that are large enough to home the recruited DCs, and support the survival and proliferation of DCs. Methods Bio-adhesive macroporous gelatin hydrogels were synthesized and characterized for mechanical properties, porous structure, and adhesion towards tissues. The recruitment of immune cells including DCs to chemokine-loaded bioadhesive macroporous gels was analyzed. The ability of gels loaded with granulocyte-macrophage colony-stimulating factor (GM-CSF) and tumor extracellular vesicles (EVs) to elicit tumor-specific CD8+ T cell responses was also analyzed. Results Here we develop a bioadhesive macroporous hydrogel that can strongly adhere to tissues, contain macropores that are large enough to home immune cells, are mechanically tough, and enable controlled release of chemokines to recruit and modulate immune cells in situ. The macroporous hydrogel is composed of a double crosslinked network of gelatin and polyacrylic acid, and the macropores are introduced via cryo-polymerization. By incorporating GM-CSF and tumor EVs into the macroporous hydrogel, a high number of DCs can be recruited in situ to process and present EV-encased antigens. These tumor antigen-presenting DCs can then traffic to lymphatic tissues to prime antigen-specific CD8+ T cells. Conclusion This bioadhesive macroporous hydrogel system provides a new platform for in situ recruitment and modulation of DCs and the development of enhanced immunotherapies including tumor EV vaccines. We also envision the promise of this material system for drug delivery, tissue regeneration, long-term immunosuppression, and many other applications. Supplementary Information The online version contains supplementary material available at 10.1007/s12195-023-00770-2.
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Affiliation(s)
- Joonsu Han
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
| | - Rimsha Bhatta
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
| | - Hua Wang
- Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
- Cancer Center at Illinois (CCIL), Urbana, IL 61801 USA
- Department of Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
- Carle College of Medicine, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
- Beckman Institute for Advanced Science and Technology, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
- Materials Research Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801 USA
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12
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Shanthi Chede L, Donovan MD. Evaluation of bioadhesive gels for local action in the esophagus. Int J Pharm 2023; 642:123115. [PMID: 37302670 DOI: 10.1016/j.ijpharm.2023.123115] [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: 12/31/2022] [Revised: 05/24/2023] [Accepted: 06/06/2023] [Indexed: 06/13/2023]
Abstract
Direct drug administration to the esophagus faces several obstacles, including continuous salivary dilution and removal of the dosage form from the tissue surface due to esophageal peristalsis. These actions often result in short exposure times and reduced concentrations of drug at the esophageal surface, providing limited opportunities for drug absorption into or across the esophageal mucosa. A variety of bioadhesive polymers were investigated for their ability to resist removal by salivary washings using an ex vivo porcine esophageal tissue model. Hydroxypropylmethylcellulose and carboxymethylcellulose both have reported bioadhesive properties, but neither was able to withstand repeated exposure to saliva, and the gels formulated with these polymers were quickly removed from the esophageal surface. Two polyacrylic polymers, carbomer and polycarbophil, also showed limited esophageal surface retention when exposed to salivary washing, likely due to the ionic composition of saliva affecting the inter-polymer interactions necessary for these polymers to maintain their increased viscosities. In situ gel forming polysaccharide gels (ion-triggered), including xanthan gum, gellan gum, and sodium alginate, showed superior tissue surface retention, and formulations containing these bioadhesive polymers along with ciclesonide, an anti-inflammatory soft prodrug, were investigated as potential, locally-acting esophageal delivery systems. Exposure of a segment of esophagus to the ciclesonide-containing gels resulted in therapeutic concentrations of des-ciclesonide, the active drug metabolite, in the tissues within 30 min. Increasing des-CIC concentrations were also observed over a 3-hour exposure interval suggesting continued release and absorption of ciclesonide into the esophageal tissues. These results demonstrate the ability to achieve therapeutic drug concentrations in the esophageal tissues using in situ gel-forming bioadhesive polymer delivery systems, and these systems provide promising opportunities for the local treatment of esophageal disease.
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Affiliation(s)
- Laxmi Shanthi Chede
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, The University of Iowa, 115 S Grand Avenue, Iowa City, Iowa, 52242-1112, USA
| | - Maureen D Donovan
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, The University of Iowa, 115 S Grand Avenue, Iowa City, Iowa, 52242-1112, USA.
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13
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Andersen OZ, Bellón B, Lamkaouchi M, Brunelli M, Wei Q, Procter P, Pippenger BE. Determining primary stability for adhesively stabilized dental implants. Clin Oral Investig 2023:10.1007/s00784-023-04990-8. [PMID: 37269339 DOI: 10.1007/s00784-023-04990-8] [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: 11/24/2022] [Accepted: 03/28/2023] [Indexed: 06/05/2023]
Abstract
OBJECTIVES To examine factors influencing the primary stability of dental implants when stabilized in over-sized osteotomies using a calcium phosphate-based adhesive cement was the objective. METHODS Using implant removal torque measurements as a surrogate for primary stability, we examined the influence of implant design features (diameter, surface area, and thread design), along with cement gap size and curing time, on the resulting primary implant stability. RESULTS Removal torque values scaled with implant surface area and increasing implant diameters. Cement gap size did not alter the median removal torque values; however, larger gaps were associated with an increased spread of the measured values. Among the removal torque values measured, all were found to be above 32 Ncm which is an insertion torque threshold value commonly recommended for immediate loading protocols. CONCLUSION The adhesive cement show potential for offering primary implant stability for different dental implant designs. In this study, the primary parameters influencing the measured removal torque values were the implant surface area and diameter. As the liquid cement prevents the use of insertion torque, considering the relationship between insertion and removal torque, removal torque can be considered a reliable surrogate for primary implant stability for bench and pre-clinical settings. CLINICAL RELEVANCE At present, the primary stability of dental implants is linked to the quality of the host bone, the drill protocol, and the specific implant design. The adhesive cement might find applications in future clinical settings for enhancing primary stability of implants under circumstances where this cannot be achieved conventionally.
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Affiliation(s)
- Ole Zoffmann Andersen
- Department of Periodontology, University of Bern, Frieburgstrasse 7, 3010, Bern, Switzerland
- Institut Straumann AG, Basel, Switzerland
| | - Benjamin Bellón
- Institut Straumann AG, Basel, Switzerland
- Faculty of Medicine and Health Technology, University of Tampere, Tampere, Finland
| | | | | | - Qiuju Wei
- Department of Periodontology, University of Bern, Frieburgstrasse 7, 3010, Bern, Switzerland
| | - Philip Procter
- Department of Materials Science and Engineering, Applied Materials Science University of Uppsala, Uppsala, Sweden
| | - Benjamin E Pippenger
- Department of Periodontology, University of Bern, Frieburgstrasse 7, 3010, Bern, Switzerland.
- Institut Straumann AG, Basel, Switzerland.
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Xue YT, Chen MY, Cao JS, Wang L, Hu JH, Li SY, Shen JL, Li XG, Zhang KH, Hao SQ, Juengpanich S, Cheng SB, Wong TW, Yang XX, Li TF, Cai XJ, Yang W. Adhesive cryogel particles for bridging confined and irregular tissue defects. Mil Med Res 2023; 10:15. [PMID: 36949519 PMCID: PMC10035260 DOI: 10.1186/s40779-023-00451-1] [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] [Grants] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 03/05/2023] [Indexed: 03/24/2023] Open
Abstract
BACKGROUND Reconstruction of damaged tissues requires both surface hemostasis and tissue bridging. Tissues with damage resulting from physical trauma or surgical treatments may have arbitrary surface topographies, making tissue bridging challenging. METHODS This study proposes a tissue adhesive in the form of adhesive cryogel particles (ACPs) made from chitosan, acrylic acid, 1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS). The adhesion performance was examined by the 180-degree peel test to a collection of tissues including porcine heart, intestine, liver, muscle, and stomach. Cytotoxicity of ACPs was evaluated by cell proliferation of human normal liver cells (LO2) and human intestinal epithelial cells (Caco-2). The degree of inflammation and biodegradability were examined in dorsal subcutaneous rat models. The ability of ACPs to bridge irregular tissue defects was assessed using porcine heart, liver, and kidney as the ex vivo models. Furthermore, a model of repairing liver rupture in rats and an intestinal anastomosis in rabbits were established to verify the effectiveness, biocompatibility, and applicability in clinical surgery. RESULTS ACPs are applicable to confined and irregular tissue defects, such as deep herringbone grooves in the parenchyma organs and annular sections in the cavernous organs. ACPs formed tough adhesion between tissues [(670.9 ± 50.1) J/m2 for the heart, (607.6 ± 30.0) J/m2 for the intestine, (473.7 ± 37.0) J/m2 for the liver, (186.1 ± 13.3) J/m2 for muscle, and (579.3 ± 32.3) J/m2 for the stomach]. ACPs showed considerable cytocompatibility in vitro study, with a high level of cell viability for 3 d [(98.8 ± 1.2) % for LO2 and (98.3 ± 1.6) % for Caco-2]. It has comparable inflammation repair in a ruptured rat liver (P = 0.58 compared with suture closure), the same with intestinal anastomosis in rabbits (P = 0.40 compared with suture anastomosis). Additionally, ACPs-based intestinal anastomosis (less than 30 s) was remarkably faster than the conventional suturing process (more than 10 min). When ACPs degrade after surgery, the tissues heal across the adhesion interface. CONCLUSIONS ACPs are promising as the adhesive for clinical operations and battlefield rescue, with the capability to bridge irregular tissue defects rapidly.
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Affiliation(s)
- Yao-Ting Xue
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China
- Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Ming-Yu Chen
- Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| | - Jia-Sheng Cao
- Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| | - Lei Wang
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China
- Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Jia-Hao Hu
- Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| | - Si-Yang Li
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China
- Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Ji-Liang Shen
- Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| | - Xin-Ge Li
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China
- Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Kai-Hang Zhang
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China
- Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Shu-Qiang Hao
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China
| | - Sarun Juengpanich
- Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| | - Si-Bo Cheng
- Soft Intelligent Materials Co., Ltd, Suzhou, 215123, China
| | - Tuck-Whye Wong
- Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- School of Biomedical Engineering and Health Sciences and Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310, Skudai, Malaysia
| | - Xu-Xu Yang
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China.
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China.
- Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China.
| | - Tie-Feng Li
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China
- Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
| | - Xiu-Jun Cai
- Department of General Surgery, Sir Run-Run Shaw Hospital, Zhejiang University, Hangzhou, 310016, China
| | - Wei Yang
- Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
- Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou, 310027, China
- Center for X-Mechanics, Department of Engineering Mechanics, Zhejiang University, Hangzhou, 310027, China
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Liu Y, Zhang Z, Zhang Y, Luo B, Liu X, Cao Y, Pei R. Construction of adhesive and bioactive silk fibroin hydrogel for treatment of spinal cord injury. Acta Biomater 2023; 158:178-189. [PMID: 36584800 DOI: 10.1016/j.actbio.2022.12.048] [Citation(s) in RCA: 15] [Impact Index Per Article: 15.0] [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: 05/16/2022] [Revised: 12/09/2022] [Accepted: 12/21/2022] [Indexed: 12/28/2022]
Abstract
Spinal cord injury (SCI) often causes severe and permanent disabilities due to the complexity of injury progression. The promising methods are generally based on tissue engineering technology using biocompatible hydrogels to achieve SCI repair. However, hydrogels are commonly incapable of close contact with the damaged spinal cord stumps and fail to support neural regeneration in SCI. Therefore, it is still a challenge to achieve stable contact with the transected nerve stumps and accelerate neural regeneration in the lesion microenvironment. Here, an in situ forming glycidyl methacrylated silk fibroin/ laminin-acrylate (SF-GMA/LM-AC) hydrogel was fabricated for SCI repair. The polymer chains formed a network quickly after ultraviolet (UV)-light trigger, in topological entanglement with the spinal cord, stitching the hydrogel and wet tissues together like a suture at the molecular scale. The SF-GMA/LM-AC hydrogel also provided a favorable environment for the growth of cells due to the incorporation of LM-AC. Compared with physical entrapment of LM, LM-AC immobilized in the hydrogel by covalent technology provided better microenvironments for neural stem cells (NSCs) growth. The repair of complete transection SCI in rats demonstrated that this hydrogel guided and promoted neural regeneration over 8 weeks, leading to hind limb locomotion recovery. This adhesive and bioactive SF-GMA/LM-AC hydrogel may open many opportunities in various therapeutic indications, including SCI. STATEMENT OF SIGNIFICANCE: Many materials have been developed for building transplanted scaffolds, but it is still a challenge to fabricate bioactive scaffolds and adhesion to wet tissues. In this study, we successfully developed an in situ forming SF-GMA/LM-AC hydrogel for SCI repair. This in situ forming hydrogel formed significant adhesion to the native spinal cord, stitching hydrogel and tissue together like a suture at the molecular scale. In addition, covalent immobilized LM-AC was used as the contact guidance biochemical cues for axonal outgrowth and had much better bioactive effects than physically entangled LM. Moreover, this universal strategy would open an avenue to fabricate adhesive and bioactive hydrogel for various disease treatments including SCI.
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Affiliation(s)
- Yuanshan Liu
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China; CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Zhuangzhuang Zhang
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China; CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Yajie Zhang
- CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China.
| | - Bingqing Luo
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China; CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Xingzhu Liu
- CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Yi Cao
- CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China
| | - Renjun Pei
- School of Nano-Tech and Nano-Bionics, University of Science and Technology of China, Hefei 230026, China; CAS Key Laboratory for Nano-Bio Interface, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215123, China.
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16
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Zhu Q, Zhou X, Zhang Y, Ye D, Yu K, Cao W, Zhang L, Zheng H, Sun Z, Guo C, Hong X, Zhu Y, Zhang Y, Xiao Y, Valencak TG, Ren T, Ren D. White-light crosslinkable milk protein bioadhesive with ultrafast gelation for first-aid wound treatment. Biomater Res 2023; 27:6. [PMID: 36737833 PMCID: PMC9898936 DOI: 10.1186/s40824-023-00346-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 01/25/2023] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Post-traumatic massive hemorrhage demands immediately available first-aid supplies with reduced operation time and good surgical compliance. In-situ crosslinking gels that are flexibly adapting to the wound shape have a promising potential, but it is still hard to achieve fast gelation, on-demand adhesion, and wide feasibility at the same time. METHODS A white-light crosslinkable natural milk-derived casein hydrogel bioadhesive is presented for the first time. Benefiting from abundant tyrosine residues, casein hydrogel bioadhesive was synthesized by forming di-tyrosine bonds under white light with a ruthenium-based catalyst. We firstly optimized the concentration of proteins and initiators to achieve faster gelation and higher mechanical strength. Then, we examined the degradation, cytotoxicity, tissue adhesion, hemostasis, and wound healing ability of the casein hydrogels to study their potential to be used as bioadhesives. RESULT Rapid gelation of casein hydrogel is initiated with an outdoor flashlight, a cellphone flashlight, or an endoscopy lamp, which facilitates its usage during first-aid and minimally invasive operations. The rapid gelation enables 3D printing of the casein hydrogel and excellent hemostasis even during liver hemorrhage due to section injury. The covalent binding between casein and tissue enables robust adhesion which can withstand more than 180 mmHg blood pressure. Moreover, the casein-based hydrogel can facilitate post-traumatic wound healing caused by trauma due to its biocompatibility. CONCLUSION Casein-based bioadhesives developed in this study pave a way for broad and practical application in emergency wound management.
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Affiliation(s)
- Qinchao Zhu
- grid.13402.340000 0004 1759 700XInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Xuhao Zhou
- grid.13402.340000 0004 1759 700XDepartment of Cardiology, Cardiovascular Key Laboratory of Zhejiang Province, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310027 Hangzhou, China
| | - Yanan Zhang
- grid.13402.340000 0004 1759 700XKey Laboratory of Animal Virology of Ministry of Agriculture, Center for Veterinary Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Di Ye
- grid.13402.340000 0004 1759 700XDepartment of Veterinary Medicine, College of Animal Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Kang Yu
- grid.13402.340000 0004 1759 700XKey Laboratory of 3D Printing Process and Equipment of Zhejiang Province, School of Mechanical Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Wangbei Cao
- grid.13402.340000 0004 1759 700XMOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Liwen Zhang
- grid.13402.340000 0004 1759 700XMOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Houwei Zheng
- grid.13402.340000 0004 1759 700XMOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Ziyang Sun
- grid.494629.40000 0004 8008 9315School of Engineering, Westlake University, 310023 Hangzhou, Zhejiang China
| | - Chengchen Guo
- grid.494629.40000 0004 8008 9315School of Engineering, Westlake University, 310023 Hangzhou, Zhejiang China
| | - Xiaoqian Hong
- grid.13402.340000 0004 1759 700XDepartment of Cardiology, Cardiovascular Key Laboratory of Zhejiang Province, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310027 Hangzhou, China
| | - Yang Zhu
- grid.13402.340000 0004 1759 700XMOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, 310027 Hangzhou, China
| | - Yajun Zhang
- grid.13402.340000 0004 1759 700XSir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 310020 Hangzhou, Zhejiang China
| | - Ying Xiao
- grid.13402.340000 0004 1759 700XSir Run Run Shaw Hospital, School of Medicine, Zhejiang University, 310020 Hangzhou, Zhejiang China
| | - Teresa G. Valencak
- grid.13402.340000 0004 1759 700XInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, 310058 Hangzhou, China
| | - Tanchen Ren
- grid.13402.340000 0004 1759 700XDepartment of Cardiology, Cardiovascular Key Laboratory of Zhejiang Province, Second Affiliated Hospital, School of Medicine, Zhejiang University, 310027 Hangzhou, China
| | - Daxi Ren
- grid.13402.340000 0004 1759 700XInstitute of Dairy Science, College of Animal Sciences, Zhejiang University, 310058 Hangzhou, China
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Greistorfer S, von Byern J, Miller I, Meyer-Rochow VB, Farkas R, Steiner G. A histochemical and morphological study of the mucus producing pedal gland system in Latia neritoides (Mollusca; Gastropoda; Hygrophila). ZOOLOGY 2023; 156:126067. [PMID: 36586306 DOI: 10.1016/j.zool.2022.126067] [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: 03/04/2022] [Revised: 11/28/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
The freshwater gastropod Latia neritoides is endemic to the streams of New Zealand's North Island. This species has evolved a unique defence system: it exudes a luminescent mucus thought to deter predators. While the bioluminescence itself has been investigated before, the underlying gland system has remained unstudied and relevant information to understand the defence system has been missing till now. For the release of the glowing mucus of L. neritoides two places of origin were assumed: the lateral foot area or the mantel cavity. In this study the focus was on the first suggestion. To gain insight into the defence system, morphological as well as histochemical analyses were performed involving all secretory gland types in the sub-epithelial foot layer. The results were compared with the foot gland system of Neritina sp., a snail living in a comparable habitat, but using a different survival strategy. The gland types of the two gastropods were compared and their mucus types were investigated. Seven subepithelial gland cell types can be distinguished in the foot region of L. neritoides. Neritina sp., in contrast, has six gland cell types of which three laterally located ones are epithelial. Both species show a pedal gland in the anterior foot region. A striking difference between the species are two prominent subepithelial gland cell types (L1l/L2l) in the lateral foot area of L. neritoides, which are missing in Neritina sp. These gland cells are distributed throughout the entire lateral foot area of L. neritoides and make up about 85% of the mucus gland cells in this area. Defence mucus and trail mucus of L. neritoides show different specificities in lectin staining, but are not equally represented in the gland cell types. Yet, based on the huge size and high density of L1l and L2L, we envision a role for these gland types in the defence system.
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Affiliation(s)
- Sophie Greistorfer
- Unit for Integrative Zoology, Department of Evolutionary Biology, University of Vienna, Austria
| | - Janek von Byern
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Ingrid Miller
- Institute of Medical Biochemistry, University of Veterinary Medicine Vienna, Austria
| | - Victor Benno Meyer-Rochow
- Department of Ecology and Genetics, Oulu University, Oulu SF-90140, Finland; Agricultural Science and Technology Research Institute, Andong National University, Andong 36729, Republic of Korea
| | - Robert Farkas
- Laboratory of Developmental Genetics, Institute of Experimental Endocrinology, Biomedical Centre, Slovak Academy of Sciences, Bratislava, Slovakia
| | - Gerhard Steiner
- Unit for Integrative Zoology, Department of Evolutionary Biology, University of Vienna, Austria.
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18
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Panebianco CJ, Dutta P, Frost JR, Huang A, Kim OS, Iatridis JC, Vernengo AJ, Weiser JR. Teaching Tissue Repair Through an Inquiry-Based Learning Bioadhesives Module. Biomed Eng Educ 2023; 3:61-74. [PMID: 37200536 PMCID: PMC10187775 DOI: 10.1007/s43683-022-00087-y] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Accepted: 09/27/2022] [Indexed: 05/20/2023]
Abstract
Bioadhesives are an important class of biomaterials for wound healing, hemostasis, and tissue repair. To develop the next generation of bioadhesives, there is a societal need to teach trainees about their design, engineering, and testing. This study designed, implemented, and evaluated a hands-on, inquiry-based learning (IBL) module to teach bioadhesives to undergraduate, master's, and PhD/postdoctoral trainees. Approximately 30 trainees across three international institutions participated in this IBL bioadhesives module, which was designed to last approximately 3 h. This IBL module was designed to teach trainees about how bioadhesives are used for tissue repair, how to engineer bioadhesives for different biomedical applications, and how to assess the efficacy of bioadhesives. The IBL bioadhesives module resulted in significant learning gains for all cohorts; whereby, trainees scored an average of 45.5% on the pre-test assessment and 69.0% on the post-test assessment. The undergraduate cohort experienced the greatest learning gains of 34.2 points, which was expected since they had the least theoretical and applied knowledge about bioadhesives. Validated pre/post-survey assessments showed that trainees also experienced significant improvements in scientific literacy from completing this module. Similar to the pre/post-test, improvements in scientific literacy were most significant for the undergraduate cohort since they had the least amount of experience with scientific inquiry. Instructors can use this module, as described, to introduce undergraduate, master's, and PhD/postdoctoral trainees to principles of bioadhesives.
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Affiliation(s)
- Christopher J. Panebianco
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Poorna Dutta
- Department of Chemical Engineering, The Cooper Union for the Advancement of Science and Art, 41 Cooper Square, New York, NY 10003, USA
| | - Jillian R. Frost
- Department of Chemical Engineering, The Cooper Union for the Advancement of Science and Art, 41 Cooper Square, New York, NY 10003, USA
| | - Angela Huang
- Department of Chemical Engineering, The Cooper Union for the Advancement of Science and Art, 41 Cooper Square, New York, NY 10003, USA
| | - Olivia S. Kim
- Department of Chemical Engineering, The Cooper Union for the Advancement of Science and Art, 41 Cooper Square, New York, NY 10003, USA
| | - James C. Iatridis
- Leni and Peter W. May Department of Orthopaedics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Andrea J. Vernengo
- Regenerative Orthopaedics Program, AO Research Institute, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Jennifer R. Weiser
- Department of Chemical Engineering, The Cooper Union for the Advancement of Science and Art, 41 Cooper Square, New York, NY 10003, USA
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19
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Osman A, Lin E, Hwang DS. A sticky carbohydrate meets a mussel adhesive: Catechol-conjugated levan for hemostatic and wound healing applications. Carbohydr Polym 2023; 299:120172. [PMID: 36876787 DOI: 10.1016/j.carbpol.2022.120172] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [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: 07/01/2022] [Revised: 09/22/2022] [Accepted: 09/26/2022] [Indexed: 10/14/2022]
Abstract
The stickiest natural polysaccharide, levan, plays a role in metalloproteinase activation, which is an important step involved in the healing of injured tissue. However, levan is easily diluted, washed away, and loses adhesion in wet environments, which limits its biomedical applications. Herein, we demonstrate a strategy for fabricating a levan-based adhesive hydrogel for hemostatic and wound healing applications by conjugating catechol to levan. Prepared hydrogels exhibit significantly improved water solubilities, and adhesion strengths to hydrated porcine skin of up to 42.17 ± 0.24 kPa which is more than three-times that of fibrin glue adhesive. The hydrogels also promote rapid blood clotting and significantly faster healing of rat-skin incisions compared to nontreated samples. In addition, levan-catechol exhibited an immune response close to that of the negative control, which is ascribable to its significantly lower endotoxin level compared to native levan. Overall, levan-catechol hydrogels are promising materials for hemostatic and wound healing applications.
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Affiliation(s)
- Asila Osman
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, South Korea; Department of Chemical Engineering, University of Khartoum, Khartoum 11115, Sudan
| | - Enhui Lin
- Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 37673, South Korea
| | - Dong Soo Hwang
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, South Korea; Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang 37673, South Korea; Institute for Convergence Research and Education in Advanced Technology, Yonsei University International Campus I-CREATE, Incheon 21983, South Korea.
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20
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Opell BD, Elmore HM, Hendricks ML. Adhesive contact and protein elastic modulus tune orb weaving spider glue droplet biomechanics to habitat humidity. Acta Biomater 2022; 151:468-479. [PMID: 35970480 DOI: 10.1016/j.actbio.2022.08.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/26/2022] [Revised: 08/02/2022] [Accepted: 08/08/2022] [Indexed: 11/18/2022]
Abstract
Tiny glue droplets along the viscous capture threads of spider orb webs prevent insects from escaping. Each droplet is formed of a protein core surrounded by a hygroscopic aqueous layer, which cause the droplet's adhesion to change with humidity. As an insect struggles to escape the web, a thread's viscoelastic core proteins extend, transferring adhesive forces to the thread's support fibers. Maximum adhesive force is achieved when absorbed atmospheric moisture allows a flattened droplet to establish sufficient adhesive contact while maintaining the core protein cohesion necessary for force transfer. We examined the relationship between these droplet properties and adhesive force and the work of extending droplets at five relative humidities in twelve species that occupy habitats which have different humidities. A regression analysis that included both flattened droplet area and core protein elastic modulus described droplet adhesion, but the model was degraded when core protein area was substituted for droplet. Species from low humidity habitats expressed greater adhesion at lower humidities, whereas species from high humidity habitats expressed greater adhesion at high humidities. Our results suggest a general model of droplet adhesion with two adhesion peaks, one for low humidity species, which occurs when increasing droplet area and decreasing protein cohesion intersect, and another for high humidity species, which occurs when area and cohesion have diverged maximally. These dual peaks in adhesive force explain why some species from intermediate and high humidity habitats express high adhesion at several humidities. STATEMENT OF SIGNIFICANCE: We characterized the effect of humidity on the adhesion of twelve orb weaving spider species' glue droplets and showed how humidity-mediated changes in the contact area of a droplet's outer, hygroscopic aqueous layer and the stiffness of its protein core affect droplet performance. This revealed how droplet adhesion has been tuned to the humidity of a species' habitat and allowed us to revise a model that describes the environmental determinants of droplet biomechanics.
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Affiliation(s)
- Brent D Opell
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061, USA.
| | - Hannah Mae Elmore
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061, USA
| | - Mary L Hendricks
- Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061, USA
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21
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Han J, Park J, Bhatta R, Liu Y, Bo Y, Zhou J, Wang H. A double crosslinking adhesion mechanism for developing tough hydrogel adhesives. Acta Biomater 2022:S1742-7061(22)00430-5. [PMID: 35870776 DOI: 10.1016/j.actbio.2022.07.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 07/11/2022] [Accepted: 07/15/2022] [Indexed: 11/24/2022]
Abstract
Tough hydrogel adhesives that consist of a robust gel network and can strongly adhere to wet tissues have shown great promise as the next generation of bioadhesives. While a variety of chemistries can be utilized to construct the tough gel network, the covalent conjugation methods for tissue adhesion are still limited. Here we report, for the first time, the use of side product-free amine-thiolactone chemistry which initiates a double crosslinking adhesion mechanism to develop tough gel adhesives. Thiolactone groups can conjugate with tissue-surface amines via a ring-opening reaction. The resultant thiol end groups can be further crosslinked into disulfide linkages, enabling the formation of a robust and stable adhesion layer. The thiolactone-bearing tough hydrogel composed of methacrylate-modified gelatin, acrylic acid, and thiolacone acrylamide exhibited good biocompatibility and mechanical properties, and strong adhesion to various types of engineering solids and tissues. We also demonstrated its ability to function as a tissue sealant and drug depot. The novel adhesion mechanism will diversify future design of bioadhesives for hemostasis, drug delivery, tissue repair, and other applications. STATEMENT OF SIGNIFICANCE: Tough hydrogel adhesives with excellent tissue-adhesive and mechanical properties have demonstrated tremendous promise for hemostasis, tissue repair, and drug delivery applications. However, the covalent chemistry for tissue adhesion has been limited, which narrows the choice of materials for the design of bioadhesives and may pose a safety concern. Here, for the first time, we report the use of side product-free amine-thiolactone chemistry, which involves a double crosslinking adhesion mechanism, for developing tough hydrogel adhesives. We demonstrate that thiolactone-bearing tough hydrogels exhibit favorable biocompatibility and mechanical properties, and superior adhesion to both engineering solids and tissues. Our new adhesion technology will greatly facilitate future development of advanced bioadhesives for numerous biomedical applications.
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22
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Wang G, Xie Y, Qian X, Zhang X, Shan Y, Zhang M, Li J, Zhang Z, Li Y. Poly (maleic anhydride-alt-1-octadecene)-based bioadhesive nanovehicles improve oral bioavailability of poor water-soluble gefitinib. Drug Dev Ind Pharm 2022; 48:109-116. [PMID: 35786162 DOI: 10.1080/03639045.2022.2098316] [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: 11/03/2022]
Abstract
The poor water solubility and inadequate oral bioavailability of gefitinib (Gef) remains a critical issue to achieve the therapeutic outcomes. Herein, we designed a poly (maleic anhydride-alt-1-octadecene) (PMA/C18) based lipid nanovehicle (PLN) to improve the intestinal absorption and oral bioavailability of poorly water-soluble Gef. PLN was nanometer-sized particles, and Gef was dispersed in the PLN formulation as amorphous or molecular state. At 4 h of oral administration, the tissue concentration of Gef in duodenum, jejunum and ileum was profoundly enhanced 3.37-, 8.94- and 8.09-fold by PLN when comparing to the counterpart lipid nanovehicle. Moreover, the oral bioavailability of Gef was significantly enhanced 2.48-fold by the PLN formulation when comparing to the free drug suspension. Therefore, this study provides an encouraging bioadhesive delivery platform to improve the oral delivery of poorly water-soluble drugs.
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Affiliation(s)
- Guanru Wang
- State Key Laboratory of Drug Research & Center of Pharmaceutics, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yaru Xie
- State Key Laboratory of Drug Research & Center of Pharmaceutics, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.,School of Pharmacy, Yantai University, Shandong, 264005, China
| | - Xindi Qian
- State Key Laboratory of Drug Research & Center of Pharmaceutics, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Xinyue Zhang
- State Key Laboratory of Drug Research & Center of Pharmaceutics, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yanqiang Shan
- Qilu Pharmaceutical (Hainan) Co. Ltd., Hainan, 570314, China
| | - Minghui Zhang
- Qilu Pharmaceutical Co. Ltd., Shandong, 250100, China
| | - Jie Li
- State Key Laboratory of Drug Research & Center of Pharmaceutics, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Zhiwen Zhang
- State Key Laboratory of Drug Research & Center of Pharmaceutics, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Yaping Li
- State Key Laboratory of Drug Research & Center of Pharmaceutics, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
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23
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Caldeira J, Celiz A, Newell N. A biomechanical testing method to assess tissue adhesives for annulus closure. J Mech Behav Biomed Mater 2022; 129:105150. [PMID: 35272150 DOI: 10.1016/j.jmbbm.2022.105150] [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] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 01/12/2022] [Accepted: 02/27/2022] [Indexed: 11/30/2022]
Abstract
Intervertebral disc (IVD) degeneration has been linked to Low Back Pain (LBP) which affects over 80% of the population ranking first in terms of disability worldwide. Degeneration progresses with age and is often accompanied by annulus fibrosus (AF) tearing and nucleus pulposus (NP) herniation. Existing therapies fail to restore IVD function and may worsen AF defects, increasing the risk of reherniation in nearly 30% of patients. Current AF closure options are ineffective, presenting biological or mechanical limitations. Bioadhesives have potential use in this area, however methods to assess performance are limited. Herein, we propose a biomechanical testing method to assess bioadhesives' capacity to seal AF tears. Two candidate bioadhesives to seal AF tears were evaluated; a tough hydrogel adhesive, and a cyanoacrylate-based glue. The adhesion energy at the interface between bovine discs and the tough hydrogel adhesive was quantified using a peel test (n=4). An experimental method to measure the burst pressure of IVDs was then developed. This method was used to quantify the burst pressure of intact (n=7), injured (AF punctured with a 21G needle; n=7), and sealed IVDs (after applying either the tough hydrogel adhesive patch as a sealant; n=5, or the cyanoacrylate-based glue over the AF tear; n=6). The tough adhesive yielded a strong adhesion energy of 239 ± 49 J/m2 during the peel tests. A maximum pressure of 13.2 ± 3.8 MPa was observed for intact discs in the burst pressure tests, which reduced by 61.4% to 5.1 ± 1.5 MPa in the injured IVDs (p < 0.01)). Application of a cyanoacrylate-based glue to injured IVDs did not recover the burst pressure with statistical significance, however, application of the tough adhesive to injured IVDs, restored burst pressure to 12.3 ± 4.5 MPa, which was not significantly different to the intact burst pressures. In this study, a simple biomechanical method to assess the performance of bioadhesives to seal AF tears based upon burst pressure has been established. Using this method it was found that a tough hydrogel adhesive was able to seal an AF injury, such that the IVD burst pressures were similar to those measured in intact specimens. This method can be used to provide a biomechanical assessment of bioadhesives under high magnitude loading and can complement existing cyclic testing methods that are currently used to assess AF closure devices, improving their assessment before clinical use.
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Affiliation(s)
- Joana Caldeira
- i3S, Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal; INEB, Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
| | - Adam Celiz
- Department of Bioengineering, Imperial College London, UK
| | - Nicolas Newell
- Department of Bioengineering, Imperial College London, UK.
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24
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Correia C, Sousa RO, Vale AC, Peixoto D, Silva TH, Reis RL, Pashkuleva I, Alves NM. Adhesive and biodegradable membranes made of sustainable catechol-functionalized marine collagen and chitosan. Colloids Surf B Biointerfaces 2022; 213:112409. [PMID: 35182936 DOI: 10.1016/j.colsurfb.2022.112409] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 01/20/2022] [Accepted: 02/10/2022] [Indexed: 11/27/2022]
Abstract
We describe bioadhesive membranes developed from marine renewable biomaterials, namely chitosan and collagen extracted from fish skins. Collagen was functionalized with catechol groups (Coll-Cat) to provide the membranes with superior adhesive properties in a wet environment and blended with chitosan to improve the mechanical properties. The blended membranes were compared to chitosan and chitosan blended with unmodified collagen in terms of surface morphology, wettability, weight loss, water uptake, mechanical and adhesive properties. The metabolic activity, the viability and the morphology of L929 fibroblastic cells seeded on these membranes were also assessed. Our results show that the functionalization with catechol groups improves the adhesive and mechanical properties of the membranes and enhances cell attachment and proliferation. These data suggest that the developed marine origin-raw membranes present a potential towards the restoration of the structural and functional properties of damaged soft tissues.
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25
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Ke X, Tang S, Dong Z, Wang H, Xu X, Qiu R, Yang J, Luo J, Li J. A silk fibroin based bioadhesive with synergistic photothermal-reinforced antibacterial activity. Int J Biol Macromol 2022; 209:608-617. [PMID: 35367271 DOI: 10.1016/j.ijbiomac.2022.03.136] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Revised: 03/11/2022] [Accepted: 03/21/2022] [Indexed: 02/05/2023]
Abstract
Bioadhesives have gained considerable popularity for application in wound closure. However, applying bioadhesives incurs risks associated with bacterial infection during wound healing. Hence, in this study, a silk fibroin based bioadhesive was constructed via employing natural macromolecule, silk fibroin (SF), to spontaneously coassemble with natural plant polyphenol, tannic acid (TA), and iron oxide nanoparticles (Fe3O4 NPs). In the system, the natural macromolecule SF plays a key role in fabricating the macromolecular network matrix due to the change of the secondary structure of SF (from random coil to β-sheet) under the trigger of TA. Importantly, the strong hydrogen bonding interactions between SF and TA, and the coordination bonds between TA and Fe3O4 NPs endow the bioadhesive with high extensibility, self-healing properties, and considerable wet adhesion. Meanwhile, the synergy between the inherent photothermal properties of Fe3O4 NPs and TA/Fe3+ complexes under near-infrared (NIR) radiation enables the bioadhesive superior photothermal-reinforced antibacterial activity. The multifunctional natural macromolecule bioadhesive is a potential candidate in clinical wound management for improved outcomes, especially in infected wounds.
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Affiliation(s)
- Xiang Ke
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China
| | - Shuxian Tang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China
| | - Zhiyun Dong
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China
| | - Hao Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China
| | - Xinyuan Xu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China
| | - Rongmin Qiu
- College & Hospital of Stomatology, Guangxi Medical University, Guangxi Key Laboratory of Oral and Maxillofacial Rehabilitation and Reconstruction, Guangxi Clinical Research Center for Craniofacial Deformity, Guangxi Key Laboratory of Oral and Maxillofacial Surgery Disease Treatment, Guangxi Health Commission Key Laboratory of Prevention and Treatment for Oral Infectious Diseases, Nanning 530021, China
| | - Jiaojiao Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China.; National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China..
| | - Jun Luo
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China..
| | - Jianshu Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China.; National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610065, China.; Med-X Center for Materials, Sichuan University, Chengdu 610041, China
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26
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Baghdasarian S, Saleh B, Baidya A, Kim H, Ghovvati M, Sani ES, Haghniaz R, Madhu S, Kanelli M, Noshadi I, Annabi N. Engineering a naturally derived hemostatic sealant for sealing internal organs. Mater Today Bio 2022; 13:100199. [PMID: 35028556 PMCID: PMC8741525 DOI: 10.1016/j.mtbio.2021.100199] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 12/14/2021] [Accepted: 12/28/2021] [Indexed: 12/26/2022] Open
Abstract
Controlling bleeding from a raptured tissue, especially during the surgeries, is essentially important. Particularly for soft and dynamic internal organs where use of sutures, staples, or wires is limited, treatments with hemostatic adhesives have proven to be beneficial. However, major drawbacks with clinically used hemostats include lack of adhesion to wet tissue and poor mechanics. In view of these, herein, we engineered a double-crosslinked sealant which showed excellent hemostasis (comparable to existing commercial hemostat) without compromising its wet tissue adhesion. Mechanistically, the engineered hydrogel controlled the bleeding through its wound-sealing capability and inherent chemical activity. This mussel-inspired hemostatic adhesive hydrogel, named gelatin methacryloyl-catechol (GelMAC), contained covalently functionalized catechol and methacrylate moieties and showed excellent biocompatibility both in vitro and in vivo. Hemostatic property of GelMAC hydrogel was initially demonstrated with an in vitro blood clotting assay, which showed significantly reduced clotting time compared to the clinically used hemostat, Surgicel®. This was further assessed with an in vivo liver bleeding test in rats where GelMAC hydrogel closed the incision rapidly and initiated blood coagulation even faster than Surgicel®. The engineered GelMAC hydrogel-based seaalant with excellent hemostatic property and tissue adhesion can be utilized for controlling bleeding and sealing of soft internal organs.
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Affiliation(s)
- Sevana Baghdasarian
- Department of Chemical and Biomolecular Engineering, University of California - Los Angeles, Los Angeles, CA, 90095, USA
| | - Bahram Saleh
- Department of Chemical Engineering Northeastern University, Boston, MA, 02115, USA
| | - Avijit Baidya
- Department of Chemical and Biomolecular Engineering, University of California - Los Angeles, Los Angeles, CA, 90095, USA
| | - Hanjun Kim
- Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, Los Angeles, CA, 90095, USA
| | - Mahsa Ghovvati
- Department of Chemical and Biomolecular Engineering, University of California - Los Angeles, Los Angeles, CA, 90095, USA
| | - Ehsan Shirzaei Sani
- Department of Chemical and Biomolecular Engineering, University of California - Los Angeles, Los Angeles, CA, 90095, USA
| | - Reihaneh Haghniaz
- Center for Minimally Invasive Therapeutics (C-MIT), California NanoSystems Institute (CNSI), University of California - Los Angeles, Los Angeles, CA, 90095, USA
| | - Shashank Madhu
- Department of Chemical Engineering Northeastern University, Boston, MA, 02115, USA
| | - Maria Kanelli
- School of Chemical Engineering, National Technical University of Athens, Zografou Campus, Athens, 15780, Greece
| | - Iman Noshadi
- Department of Bioengineering, University of California, Riverside, 92507, USA
| | - Nasim Annabi
- Department of Chemical and Biomolecular Engineering, University of California - Los Angeles, Los Angeles, CA, 90095, USA
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27
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Devaud YR, Stäuble S, Moehrlen U, Weisskopf M, Vonzun L, Zimmermann R, Ehrbar M, Ochsenbein-Kölble N. Minimally Invasive Precise Application of Bioadhesives to Prevent IPPROM on a Pregnant Sheep Model. Fetal Diagn Ther 2021; 48:785-793. [PMID: 34814145 DOI: 10.1159/000519910] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 03/28/2021] [Accepted: 09/10/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Iatrogenic preterm premature rupture of the membrane remains the Achille's heel of fetoscopy. The aim of this study was to show in vivo feasibility of fetal membrane (FM) defect sealing by the application of tissue glues with umbrella-shaped receptors. METHODS First, we adapted our previously described ex vivo strategy and evaluated the adhesion strength of different tissue glues, Histoacryl® and Glubran2®, by bonding polytetrafluoroethylene or silicone encapsulated nitinol glue receptor to human FM. Then, we exposed pregnant sheep uterus through a laparotomy and placed a 10-French trocar into the amniotic cavity through which the umbrella-shaped glue receptor (n = 9) was inserted and fixated onto the FM with the tissue glues (n = 8). The tightness of the sealed defects was assessed 4 h post-surgery. RESULTS Both tissue glues tested resulted in adhesion of the glue receptors to the FM ex vivo. In vivo, all glue receptors opened in the amniotic cavity (n = 9) and all successfully placed glue receptors sealed the FM defect (n = 8). Four hours post-surgery, 2 treatment sites showed minimal leakage whereas the negative control without glue (n = 1) showed substantial leakage. DISCUSSION This in vivo study confirms that fetoscopically induced FM defects can be sealed by the application of tissue adhesives.
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Affiliation(s)
- Yannick R Devaud
- Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland.,University of Zurich, Zurich, Switzerland
| | - Senta Stäuble
- Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland.,University of Zurich, Zurich, Switzerland
| | - Ueli Moehrlen
- University of Zurich, Zurich, Switzerland.,Pediatric Surgery, University Children's Hospital Zurich, Zurich, Switzerland.,The Zurich Center for Fetal Diagnosis and Therapy, Zurich, Switzerland
| | - Miriam Weisskopf
- University of Zurich, Zurich, Switzerland.,Center of Surgical Research, University Hospital Zurich, Zurich, Switzerland
| | - Ladina Vonzun
- Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland.,University of Zurich, Zurich, Switzerland.,The Zurich Center for Fetal Diagnosis and Therapy, Zurich, Switzerland
| | - Roland Zimmermann
- Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland.,University of Zurich, Zurich, Switzerland.,The Zurich Center for Fetal Diagnosis and Therapy, Zurich, Switzerland
| | - Martin Ehrbar
- Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland.,University of Zurich, Zurich, Switzerland.,The Zurich Center for Fetal Diagnosis and Therapy, Zurich, Switzerland
| | - Nicole Ochsenbein-Kölble
- Department of Obstetrics, University Hospital Zurich, Zurich, Switzerland.,University of Zurich, Zurich, Switzerland.,The Zurich Center for Fetal Diagnosis and Therapy, Zurich, Switzerland
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Ahmady A, Abu Samah NH. A review: Gelatine as a bioadhesive material for medical and pharmaceutical applications. Int J Pharm 2021; 608:121037. [PMID: 34438009 DOI: 10.1016/j.ijpharm.2021.121037] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [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: 06/08/2021] [Revised: 08/10/2021] [Accepted: 08/20/2021] [Indexed: 12/23/2022]
Abstract
Bioadhesive polymers offer versatility to medical and pharmaceutical inventions. The incorporation of such materials to conventional dosage forms or medical devices may confer or improve the adhesivity of the bioadhesive systems, subsequently prolonging their residence time at the site of absorption or action and providing sustained release of actives with improved bioavailability and therapeutic outcomes. For decades, much focus has been put on scientific works to replace synthetic polymers with biopolymers with desirable functional properties. Gelatine has been considered one of the most promising biopolymers. Despite its biodegradability, biocompatibility and unique biological properties, gelatine exhibits poor mechanical and adhesive properties, limiting its end-use applications. The chemical modification and blending of gelatine with other biomaterials are strategies proposed to improve its bioadhesivity. Here we discuss the classical approaches involving a variety of polymer blends and composite systems containing gelatine, and gelatine modifications via thiolation, methacrylation, catechol conjugation, amination and other newly devised strategies. We highlight several of the latest studies on these strategies and their relevant findings.
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Affiliation(s)
- Amina Ahmady
- Department of Pharmaceutics, Faculty of Pharmacy, Universiti Teknologi MARA, Selangor Branch, Puncak Alam Campus, 42300 Puncak Alam, Malaysia
| | - Nor Hayati Abu Samah
- Department of Pharmaceutics, Faculty of Pharmacy, Universiti Teknologi MARA, Selangor Branch, Puncak Alam Campus, 42300 Puncak Alam, Malaysia.
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Wanasingha N, Dutta NK, Choudhury NR. Emerging bioadhesives: from traditional bioactive and bioinert to a new biomimetic protein-based approach. Adv Colloid Interface Sci 2021; 296:102521. [PMID: 34534751 DOI: 10.1016/j.cis.2021.102521] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 09/04/2021] [Accepted: 09/04/2021] [Indexed: 12/29/2022]
Abstract
Bioadhesives have reached significant milestones over the past two decades. Research has shown not only to produce adhesives capable of adhering to dry tissue but recently wet tissue as well. However, most bioadhesives developed have exhibited high adhesion strength yet lack other properties required for versatility in application, such as elasticity, biocompatibility and biodegradability. Adapting from limitations met from early bioadhesives and meeting the current demand allows novel bioadhesives to reach new milestones for the future. In this review, we overview the progression and variations of bioadhesives, current trends, characterisation techniques and conclude with future perspectives for bioadhesives for tissue engineering applications.
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Affiliation(s)
- Nisal Wanasingha
- School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
| | - Naba K Dutta
- School of Engineering, RMIT University, Melbourne, VIC 3000, Australia
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30
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Opell BD, Elmore HM, Hendricks ML. Humidity mediated performance and material properties of orb weaving spider adhesive droplets. Acta Biomater 2021; 131:440-451. [PMID: 34144212 DOI: 10.1016/j.actbio.2021.06.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 02/16/2021] [Revised: 06/05/2021] [Accepted: 06/08/2021] [Indexed: 12/01/2022]
Abstract
Capture thread glue droplets retain insects that strike an orb web and are key to the success of over 4,600 described spider species. Each droplet is a self-assembling adhesive system whose emergent biomechanical properties are centered on its viscoelastic, protein core. This bioadhesive is dependent on its surrounding hygroscopic aqueous layer for hydration and chemical conditioning. Consequently, a droplet's water content and adhesive performance track environmental humidity. We tested the hypothesis that natural selection has tuned a droplet's adhesive performance and material properties to a species' foraging humidity. At 55% relative humidity (RH) the adhesive properties of 12 species ranged from that of PEG-based hydrogels to that of silicone rubber, exhibiting a 1088-fold inter-specific difference in stiffness (0.02-21.76 MPa) and a 147-fold difference in toughness (0.14-20.51 MJ/m3). When tested over a 70% RH range, droplet extension lengths per protein core volume peaked at lower humidities in species from exposed, low humidity habitats, and at higher humidities in nocturnal species and those found in humid habitats. However, at the RH's where these species' maximum extension per protein volume indices were observed, the stiffness of most species' adhesive did not differ, documenting that selection has tuned elastic modulus by adjusting droplet hygroscopicity. This inverse relationship between droplet hygroscopicity and a species' foraging humidity ensures optimal adhesive stiffness. By characterizing the humidity responsiveness and properties of orb spider glue droplets, our study also profiles the range of its biomimetic potential. STATEMENT OF SIGNIFICANCE: Over 4,600 described species of orb weaving spider rely on tiny glue droplets in their webs to retain insect that the web intercepts. The aqueous layer that covers each droplet's core allows this adhesive to remain pliable and to stretch as an insect struggles to escape. The aqueous solution also attracts water from the air, causing the glue droplet's performance to change with humidity. By characterizing the droplet extensions and adhesive material properties of twelve species at relative humidities between of 20 and 90%, this study examined how this unique adhesive system responds to its environment and how it is tuned to the humidity of a species' habitat.
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Affiliation(s)
- Brent D Opell
- Department of Biological Sciences, Virginia Tech Blacksburg, VA 24061 United States.
| | - Hannah Mae Elmore
- Department of Biological Sciences, Virginia Tech Blacksburg, VA 24061 United States
| | - Mary L Hendricks
- Department of Biological Sciences, Virginia Tech Blacksburg, VA 24061 United States
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31
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Tan NCS, Djordjevic I, Malley JA, Kwang ALQ, Ikhwan S, Šolić I, Singh J, Wicaksono G, Lim S, Steele TWJ. Sunlight activated film forming adhesive polymers. Mater Sci Eng C Mater Biol Appl 2021; 127:112240. [PMID: 34225880 DOI: 10.1016/j.msec.2021.112240] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/25/2021] [Accepted: 06/02/2021] [Indexed: 02/06/2023]
Abstract
Stimuli-sensitive biomaterials that are activated by light are in need of formulations that are stable under indoor lighting yet can be activated under direct sunlight. Carbene-based bioadhesives are a new generation of film-forming polymers that are stable under indoor lighting yet are rapidly activated with low-energy UVA light, but have never been evaluated under sunlight exposure. Previous investigations have evolved two flexible carbene-based platforms, where aryl-diazirine is grafted on to polyamidoamine dendrimers (PAMAM-NH2; generation-5) or hydrophobic liquid polycaprolactone tetrol to yield G5-Dzx and CaproGlu, respectively. For the first time the activation of G5-Dzx and CaproGlu is investigated by natural sunlight with intensities up to 10 mW·cm-2. Structure-property relationships of bioadhesion are investigated by: (1) joules dose of sunlight; (2) bioadhesive polymer structure; and (3) optical concentrators of magnifying glass and Fresnel lens. Using only natural sunlight, adhesion strength could be tuned from 20 to 150 kPa with crosslinking achieved in under 1 min. The results show that carbene-based polymers are a class of stimuli-sensitive biomaterials that are stable to indoor lighting, yet can be rapidly activated under direct sunlight, which may be useful for topical film forming polymers or as active ingredients in sunscreen formulations.
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Farasatkia A, Kharaziha M. Robust and double-layer micro-patterned bioadhesive based on silk nanofibril/GelMA-alginate for stroma tissue engineering. Int J Biol Macromol 2021; 183:1013-1025. [PMID: 33974922 DOI: 10.1016/j.ijbiomac.2021.05.048] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 04/25/2021] [Accepted: 05/06/2021] [Indexed: 12/12/2022]
Abstract
We develop a robust micro-patterned double-layer film that can adhere firmly to the tissue and provide a sustained release of ascorbic acid (AA) for corneal regeneration. This double-layer film consists of a AA reservoir sodium alginate (SA) adhesive and an anisotropic layer made of micro-patterned silk nanofibrils (SNF) incorporated gelatin methacrylate (GelMA) (S/G). The S/G layer facilitates the adhesion and orientation of corneal stroma cells, depending on the pattern sizes (50 μm (P1) and 100 (P2) μm). Results reveal that more than 90% and 80% of the cells are located at angles close to the vertical axis (0-20°) in the sample with the smaller and larger pattern size, respectively. The mechanical robustness and 90% light transmission of this hybrid film originate from the micro-patterned S/G layer. However, the micro-pattern size does not show a significant role in the mechanical properties of hybrid films (tensile strength of S/G-SA, S/G-SA(P1), and S/G-SA(P2) is 3.4 ± 0.1 MPa, 3.6 ± 0.6 MPa and 3.3 ± 0.2 MPa, respectively). In addition, the strong adhesion to the tissue of this double-layer film is related to the alginate layer. AA can release in a controlled manner, which can significantly promote corneal stroma cells' attachment, alignment, and proliferation compared to the control (AA-free micro-patterned film). Our results reveal that this innovative multifunctional S/G-SA + AA film can be a proper candidate for use in stroma tissue engineering of the human cornea.
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Affiliation(s)
- Asal Farasatkia
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Mahshid Kharaziha
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
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Sharifi S, Islam MM, Sharifi H, Islam R, Koza D, Reyes-Ortega F, Alba-Molina D, Nilsson PH, Dohlman CH, Mollnes TE, Chodosh J, Gonzalez-Andrades M. Tuning gelatin-based hydrogel towards bioadhesive ocular tissue engineering applications. Bioact Mater 2021; 6:3947-3961. [PMID: 33937594 PMCID: PMC8080056 DOI: 10.1016/j.bioactmat.2021.03.042] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/26/2021] [Accepted: 03/26/2021] [Indexed: 12/27/2022] Open
Abstract
Gelatin based adhesives have been used in the last decades in different biomedical applications due to the excellent biocompatibility, easy processability, transparency, non-toxicity, and reasonable mechanical properties to mimic the extracellular matrix (ECM). Gelatin adhesives can be easily tuned to gain different viscoelastic and mechanical properties that facilitate its ocular application. We herein grafted glycidyl methacrylate on the gelatin backbone with a simple chemical modification of the precursor, utilizing epoxide ring-opening reactions and visible light-crosslinking. This chemical modification allows the obtaining of an elastic protein-based hydrogel (GELGYM) with excellent biomimetic properties, approaching those of the native tissue. GELGYM can be modulated to be stretched up to 4 times its initial length and withstand high tensile stresses up to 1.95 MPa with compressive strains as high as 80% compared to Gelatin-methacryloyl (GeIMA), the most studied derivative of gelatin used as a bioadhesive. GELGYM is also highly biocompatible and supports cellular adhesion, proliferation, and migration in both 2 and 3-dimensional cell-cultures. These characteristics along with its super adhesion to biological tissues such as cornea, aorta, heart, muscle, kidney, liver, and spleen suggest widespread applications of this hydrogel in many biomedical areas such as transplantation, tissue adhesive, wound dressing, bioprinting, and drug and cell delivery.
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Affiliation(s)
- Sina Sharifi
- Massachusetts Eye and Ear and Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Mohammad Mirazul Islam
- Massachusetts Eye and Ear and Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Hannah Sharifi
- Massachusetts Eye and Ear and Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Rakibul Islam
- Department of Immunology, Oslo University Hospital, Rikshospitalet, University of Oslo, Oslo, Norway
| | - Darrell Koza
- Department of Physical Sciences, Eastern Connecticut State University, Willimantic, CT, USA
| | - Felisa Reyes-Ortega
- Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Department of Ophthalmology, Reina Sofia University Hospital and University of Cordoba, Cordoba, Spain
| | - David Alba-Molina
- Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Department of Ophthalmology, Reina Sofia University Hospital and University of Cordoba, Cordoba, Spain
| | - Per H Nilsson
- Department of Immunology, Oslo University Hospital, Rikshospitalet, University of Oslo, Oslo, Norway.,Linnaeus Center for Biomaterials Chemistry, Linnaeus University, Kalmar, Sweden
| | - Claes H Dohlman
- Massachusetts Eye and Ear and Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Tom Eirik Mollnes
- Department of Immunology, Oslo University Hospital, Rikshospitalet, University of Oslo, Oslo, Norway.,Research Laboratory, Nordland Hospital, Bodø, Norway.,Centre of Molecular Inflammation Research, Norwegian University of Science and Technology, Trondheim, Norway.,Faculty of Health Sciences, K.G. Jebsen TREC, University of Tromsø, Norway
| | - James Chodosh
- Massachusetts Eye and Ear and Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Miguel Gonzalez-Andrades
- Massachusetts Eye and Ear and Schepens Eye Research Institute, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA.,Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Department of Ophthalmology, Reina Sofia University Hospital and University of Cordoba, Cordoba, Spain
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Lazow SP, Labuz DF, Freedman BR, Rock A, Zurakowski D, Mooney DJ, Fauza DO. A novel two-component, expandable bioadhesive for exposed defect coverage: Applicability to prenatal procedures. J Pediatr Surg 2021; 56:165-169. [PMID: 33109345 PMCID: PMC7854994 DOI: 10.1016/j.jpedsurg.2020.09.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 09/12/2020] [Accepted: 09/23/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND/PURPOSE We sought to test select properties of a novel, expandable bioadhesive composite that allows for enhanced adhesion control in liquid environments. METHODS Rabbit fetuses (n = 23) underwent surgical creation of spina bifida on gestational day 22-25 (term 32-33 days). Defects were immediately covered with a two-component tough adhesive consisting of a hydrogel made of a double network of ionically crosslinked alginate and covalently crosslinked polyacrylamide linked to a bridging chitosan polymer adhesive. Animals were euthanized prior to term for different analyses, including hydraulic pressure testing. RESULTS Hydrogels remained adherent in 70% (16/23) of the recovered fetuses and in all of the last 14 fetuses as the procedure was optimized. Adherent hydrogels showed a median two-fold (IQR: 1.7-2.4) increase in area at euthanasia, with defect coverage confirmed by ultrasound and histology. The median maximum pressure to repair failure was 15 mmHg (IQR: 7.8-55.3), exceeding reported neonatal cerebrospinal fluid pressures. CONCLUSIONS This novel bioadhesive composite allows for selective, stable attachment of an alginate-polyacrylamide hydrogel to specific areas of the spina bifida defect in a fetal rabbit model, while the hydrogel expands with the defect over time. It could become a valuable alternative for the prenatal repair of spina bifida and possibly other congenital anomalies. TYPE OF STUDY N/A (animal and laboratory study). LEVEL OF EVIDENCE N/A (animal and laboratory study).
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Affiliation(s)
- Stefanie P. Lazow
- Department of Surgery, Boston Children’s Hospital and Harvard Medical School, Boston, MA
| | - Daniel F. Labuz
- Department of Surgery, Boston Children’s Hospital and Harvard Medical School, Boston, MA
| | - Benjamin R. Freedman
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA,Harvard John A. Paulson School of Engineering and Applied Sciences at Harvard University Boston and Cambridge, Massachusetts
| | - Anna Rock
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA
| | - David Zurakowski
- Department of Surgery, Boston Children’s Hospital and Harvard Medical School, Boston, MA
| | - David J. Mooney
- Wyss Institute for Biologically Inspired Engineering at Harvard University, Boston, MA,Harvard John A. Paulson School of Engineering and Applied Sciences at Harvard University Boston and Cambridge, Massachusetts
| | - Dario O. Fauza
- Department of Surgery, Boston Children’s Hospital and Harvard Medical School, Boston, MA
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35
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Singh M, Nanda HS, Lee JYH, Wang JK, Tan NS, Steele TWJ. Photocurable platelet rich plasma bioadhesives. Acta Biomater 2020; 117:133-41. [PMID: 32966923 DOI: 10.1016/j.actbio.2020.09.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/15/2020] [Accepted: 09/15/2020] [Indexed: 02/07/2023]
Abstract
Closure of wounds with tissue adhesives has many advantages over sutures, but existing synthetic adhesives are toxic and have poor workability. Blood-derived adhesives display complete resorption but have adhesion too weak for reliable wound dressings. We propose a semi-synthetic design that combines the positive attributes of synthetic and blood-derived tissue adhesives. PAMAM-g-diazirine (PDz) is a rapidly gelling bioadhesive miscible in both aqueous and organic solvents. PDz blended with platelet-rich plasma (PRP) forms PDz/PRP composite, a semi-synthetic formulation that combines PDz's wet tissue adhesion with PRP's potent wound healing properties. Light-activated PDz/PRP bioadhesive composite has similar elasticity to soft tissues and behaves as an induced hemostat-an unmet clinical need for rapid wound dressings. PDz/PRP composite applied to in-vivo full-thickness wounds observed a 25% reduction in inflammation, as assessed by the host-cell response.
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Lefevre M, Flammang P, Aranko AS, Linder MB, Scheibel T, Humenik M, Leclercq M, Surin M, Tafforeau L, Wattiez R, Leclère P, Hennebert E. Sea star-inspired recombinant adhesive proteins self-assemble and adsorb on surfaces in aqueous environments to form cytocompatible coatings. Acta Biomater 2020; 112:62-74. [PMID: 32502634 DOI: 10.1016/j.actbio.2020.05.036] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [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: 01/30/2020] [Revised: 05/22/2020] [Accepted: 05/26/2020] [Indexed: 11/28/2022]
Abstract
Sea stars adhere to various underwater substrata using an efficient protein-based adhesive secretion. The protein Sfp1 is a major component of this secretion. In the natural glue, it is cleaved into four subunits (Sfp1 Alpha, Beta, Delta and Gamma) displaying specific domains which mediate protein-protein or protein-carbohydrate interactions. In this study, we used the bacterium E. coli to produce recombinantly two fragments of Sfp1 comprising most of its functional domains: the C-terminal part of the Beta subunit (rSfp1 Beta C-term) and the Delta subunit (rSfp1 Delta). Using native polyacrylamide gel electrophoresis and size exclusion chromatography, we show that the proteins self-assemble and form oligomers and aggregates in the presence of NaCl. Moreover, they adsorb onto glass and polystyrene upon addition of Na+ and/or Ca2+ ions, forming homogeneous coatings or irregular meshworks, depending on the cation species and concentration. We show that coatings made of each of the two proteins have no cytotoxic effects on HeLa cells and even increase their proliferation. We propose that the Sfp1 recombinant protein coatings are valuable new materials with potential for cell culture or biomedical applications. STATEMENT OF SIGNIFICANCE: Biological adhesives offer impressive performance in their natural context and, therewith, the potential to inspire the development of advanced biomaterials for an increasing variety of applications in medicine or in material sciences. To date, most marine adhesive proteins that have been produced recombinantly in order to develop bio-inspired adhesives are small proteins from mussels and barnacles. Here, we produced two multi-modular proteins based on the sequence of Sfp1, a major protein from sea star adhesive secretion. These two proteins comprise most of Sfp1 functional domains which mediate protein-protein and protein-carbohydrate interactions. We characterized the two recombinant proteins with an emphasis on functional characteristics such as self-assembly, adsorption and cytocompatibility. We discuss their potential as biomaterials.
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Affiliation(s)
- Mathilde Lefevre
- Laboratory of Cell Biology, Research Institute for Biosciences, University of Mons, Place du Parc 23, 7000 Mons, Belgium; Laboratory for Chemistry of Novel Materials, Research Institute for Materials, Center for Innovation and Research in Materials and Polymers (CIRMAP), University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - Patrick Flammang
- Biology of Marine Organisms and Biomimetics Unit, Research Institute for Biosciences, University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - A Sesilja Aranko
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16100, FI-02150 Espoo, Finland
| | - Markus B Linder
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, P.O. Box 16100, FI-02150 Espoo, Finland
| | - Thomas Scheibel
- Department of Biomaterials, Faculty of Engineering Science, University of Bayreuth, Prof.-Rüdiger-Bormann Str.1, 95447 Bayreuth, Germany
| | - Martin Humenik
- Department of Biomaterials, Faculty of Engineering Science, University of Bayreuth, Prof.-Rüdiger-Bormann Str.1, 95447 Bayreuth, Germany
| | - Maxime Leclercq
- Laboratory for Chemistry of Novel Materials, Research Institute for Materials, Center for Innovation and Research in Materials and Polymers (CIRMAP), University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - Mathieu Surin
- Laboratory for Chemistry of Novel Materials, Research Institute for Materials, Center for Innovation and Research in Materials and Polymers (CIRMAP), University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - Lionel Tafforeau
- Laboratory of Cell Biology, Research Institute for Biosciences, University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - Ruddy Wattiez
- Laboratory of Proteomics and Microbiology, Research Institute for Biosciences, University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - Philippe Leclère
- Laboratory for Chemistry of Novel Materials, Research Institute for Materials, Center for Innovation and Research in Materials and Polymers (CIRMAP), University of Mons, Place du Parc 23, 7000 Mons, Belgium
| | - Elise Hennebert
- Laboratory of Cell Biology, Research Institute for Biosciences, University of Mons, Place du Parc 23, 7000 Mons, Belgium.
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Wafa HG, Essa EA, El-Sisi AE, El Maghraby GM. Ocular films versus film-forming liquid systems for enhanced ocular drug delivery. Drug Deliv Transl Res 2021; 11:1084-95. [PMID: 32728811 DOI: 10.1007/s13346-020-00825-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The short residence time, corneal barrier functions, and other effective eye protective mechanisms limited the ocular availability after topical application. Ocular inserts are being developed as polymer films for insertion into the conjunctival sac with the goal of increasing ocular availability. Unfortunately, these devices are not convenient for patients and are associated with many problems. The use of in situ gel/film-forming systems may provide promising alternative with comparable efficacy but this requires verification. Therefore, the current study compared ocular inserts with in situ film-forming liquids containing the same polymer components for ocular delivery of pilocarpine nitrate. Solvent casting technique was employed to prepare the inserts using and polyvinyl alcohol (PVA) as film-forming polymer blended with sodium alginate, as bioadhesive polymer. The effect of addition of either carboxymethycellulose, carbopol, polyvinylpyrrolidone, or methylcellulose was investigated. Solid-state characterization of the inserts indicated compatibility of the drug with film component. All inserts were of acceptable bioadhesive parameters and folding endurance that depended on the film composition. In vitro release studies reflected matrix diffusion kinetics for the film and liquid formulations. This confirms the in situ gelation of liquids. The calculated in vivo miotic pharmacokinetics parameters, using albino rabbits, reflected a better rank for the film but the difference was not statistically different from the in situ gel/film-forming systems. Ocular safety, as reflected by tear volume test, indicated acceptable safety of both liquid and inserts to the eye. The study suggested comparable efficacy of film-forming liquids to that of ocular films. Graphical abstract.
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Algharib SA, Dawood A, Zhou K, Chen D, Li C, Meng K, Maa MK, Ahmed S, Huang L, Xie S. Designing, structural determination and biological effects of rifaximin loaded chitosan- carboxymethyl chitosan nanogel. Carbohydr Polym 2020; 248:116782. [PMID: 32919570 DOI: 10.1016/j.carbpol.2020.116782] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 07/14/2020] [Accepted: 07/15/2020] [Indexed: 12/25/2022]
Abstract
Due to the poor solubility and permeability of rifaximin (RFX), it is not effective against intracellular pathogens although it shows strong activity against most bacteria. To develop an effective mucoadhesive drug delivery system with a targeted release in bacterial infection site, RFX-loaded chitosan (CS)/carboxymethyl-chitosan (CMCS) nanogel was designed and systematically evaluated. FTIR, DSC, and XRD demonstrated that the nanogel was formed by interactions between the positively charged NH3+ on CS and CMCS, and the negatively charged COO on CMCS. RFX was encapsulated into the optimized nanogel in amorphous form. The nanogel was a uniform spherical shape with a mean diameter of 171.07 nm. It had excellent sustained release, strong mucin binding ability, and pH-responsive properties of quicker swelling and release at acidic pH. It showed low hemolytic ratio and high antioxidant activity. The present investigation indicated that the CS-nanogel could be potentially used as a promising bacterial responsiveness drug delivery system.
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Djordjevic I, Pokholenko O, Shah AH, Wicaksono G, Blancafort L, Hanna JV, Page SJ, Nanda HS, Ong CB, Chung SR, Chin AYH, McGrouther D, Choudhury MM, Li F, Teo JS, Lee LS, Steele TWJ. CaproGlu: Multifunctional tissue adhesive platform. Biomaterials 2020; 260:120215. [PMID: 32891870 DOI: 10.1016/j.biomaterials.2020.120215] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [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: 02/14/2020] [Revised: 05/28/2020] [Accepted: 06/20/2020] [Indexed: 02/06/2023]
Abstract
Driven by the clinical need for a strong tissue adhesive with elastomeric material properties, a departure from legacy crosslinking chemistries was sought as a multipurpose platform for tissue mending. A fresh approach to bonding wet substrates has yielded a synthetic biomaterial that overcomes the drawbacks of free-radical and nature-inspired bioadhesives. A food-grade liquid polycaprolactone grafted with carbene precursors yields CaproGlu. The first-of-its-kind low-viscosity prepolymer is VOC-free and requires no photoinitiators. Grafted diazirine end-groups form carbene diradicals upon low energy UVA (365 nm) activation that immediately crosslink tissue surfaces; no pre-heating or animal-derived components are required. The hydrophobic polymeric environment enables metastable functional groups not possible in formulations requiring solvents or water. Activated diazirine within CaproGlu is uniquely capable of crosslinking all amino acids, even on wet tissue substrates. CaproGlu undergoes rapid liquid-to-biorubber transition within seconds of UVA exposure-features not found in any other bioadhesive. The exceptional shelf stability of CaproGlu allows gamma sterilization with no change in material properties. CaproGlu wet adhesiveness is challenged against current unmet clinical needs: anastomosis of spliced blood vessels, anesthetic muscle patches, and human platelet-mediating coatings. The versatility of CaproGlu enables both organic and inorganic composites for future bioadhesive platforms.
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Affiliation(s)
- Ivan Djordjevic
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore.
| | - Oleksandr Pokholenko
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore.
| | - Ankur Harish Shah
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore.
| | - Gautama Wicaksono
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore.
| | - Lluis Blancafort
- Departamento de Química and Instituto de Química Computacional i Catálisis. Facultad de Ciències, Universidad de Girona, C/M.A. Capmany 69, 17003, Girona, Spain.
| | - John V Hanna
- Department of Physics, University of Warwick, Gibbet Hill Rd., Coventry, CV4 7AL, United Kingdom.
| | - Samuel J Page
- Department of Physics, University of Warwick, Gibbet Hill Rd., Coventry, CV4 7AL, United Kingdom.
| | - Himansu Sekhar Nanda
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore; Biomedical Engineering and Technology Laboratory, Department of Mechanical Engineering, PDPM-Indian Institute of Information Technology, Design and Manufacturing (IIITDM)-Jabalpur, Dumna Airport Road, Jabalpur, 482005, MP, India.
| | - Chee Bing Ong
- Histopathology/Advanced Molecular Pathology Lab, Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research, 61 Biopolis Drive, Level 6 Proteos Building, 138673, Singapore.
| | - Sze Ryn Chung
- Singapore General Hospital, Department of Hand Surgery, 169608, Singapore.
| | | | - Duncan McGrouther
- Singapore General Hospital, Department of Hand Surgery, 169608, Singapore.
| | | | - Fang Li
- Singapore General Hospital, Department of Hand Surgery, 169608, Singapore.
| | - Jonathan Shunming Teo
- Singapore General Hospital, Department of Hand Surgery, 169608, Singapore; Sengkang General Hospital, Department of Urology, 544886, Singapore.
| | - Lui Shiong Lee
- Singapore General Hospital, Department of Hand Surgery, 169608, Singapore; Sengkang General Hospital, Department of Urology, 544886, Singapore.
| | - Terry W J Steele
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore.
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Shah AH, Pokholenko O, Nanda HS, Steele TWJ. Non-aqueous, tissue compliant carbene-crosslinking bioadhesives. Mater Sci Eng C Mater Biol Appl 2019; 100:215-225. [PMID: 30948055 DOI: 10.1016/j.msec.2019.03.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 01/22/2019] [Accepted: 03/01/2019] [Indexed: 01/06/2023]
Abstract
Surgical adhesives are an attractive alternative to traditional mechanical tissue fixation methods of sutures and staples. Ease of application, biocompatibility, enhanced functionality (drug delivery) are known advantages but weak adhesion strength in the wet environment and lack of tissue compliant behavior still pose a challenge. In order to address these issues, non-aqueous bioadhesive based on blends of polyamidoamine (PAMAM) dendrimer, conjugated with 4-[3-(trifluoromethyl)-3H-diazirin-3-yl] benzyl bromide (PAMAM-g-diazirine) and liquid polyethylene glycol (PEG 400) has been developed. PEG 400 biocompatible solvent reduces the viscosity of PAMAM-g-diazirine dendrimer without incorporating aqueous solvents or plasticizers, allowing application by syringe or spray. Upon UV activation, diazirine-generated reactive intermediates lead to intermolecular dendrimer crosslinking. The properties of the crosslinked matrix are tissue compliant, with anisotropic material properties dependent on the PEG 400 wt%, UV dose, pressure and uncured adhesive thickness. The hygroscopic PAMAM-g-diazirine/PEG 400 blend was hypothesized to absorb water at the tissue interface, leading to high interfacial adhesion, however porous matrices led to cohesive failure. The hydrophilic nature of the polyether backbone (PEG 400) shielded cationic PAMAM dendrimers with cured bioadhesive film displaying significantly less platelet activation than neat PAMAM-g-diazirine or PLGA thin films.
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Affiliation(s)
- Ankur Harish Shah
- School of Materials Science and Engineering, Division of Materials Technology, Nanyang Technological University, Singapore 639798, Singapore
| | - Oleksander Pokholenko
- School of Materials Science and Engineering, Division of Materials Technology, Nanyang Technological University, Singapore 639798, Singapore
| | - Himanshu Sekhar Nanda
- Department of Mechanical Engineering, PDPM-Indian Institute of Information Technology, Design and Manufacturing (IIITDM)-Jabalpur, Dumna Airport Road, Jabalpur 482005, MP, India
| | - Terry W J Steele
- School of Materials Science and Engineering, Division of Materials Technology, Nanyang Technological University, Singapore 639798, Singapore.
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Abstract
Bioadhesives such as tissue adhesives, hemostatic agents, and tissue sealants have gained increasing popularity in different areas of clinical operations during the last three decades. Bioadhesives can be categorized into internal and external ones according to their application conditions. External bioadhesives are generally applied in topical medications such as wound closure and epidermal grafting. Internal bioadhesives are mainly used in intracorporal conditions with direct contact to internal environment including tissues, organs and body fluids, such as chronic organ leak repair and bleeding complication reduction. This review focuses on internal bioadhesives that, in contrast with external bioadhesives, emphasize much more on biocompatibility and adhesive ability to wet surfaces rather than on gluing time and intensity. The crosslinking mechanisms of present internal bioadhesives can be generally classified as follows: 1) chemical conjugation between reactive groups; 2) free radical polymerization by light or redox initiation; 3) biological or biochemical coupling with specificity; and 4) biomimetic adhesion inspired from natural phenomena. In this review, bioadhesive products of each class are summarized and discussed by comparing their designs, features, and applications as well as their prospects for future development. STATEMENT OF SIGNIFICANCE Despite the emergence of numerous novel bioadhesive formulations in recent years, thus far, the classification of internal and external bioadhesives has not been well defined and universally acknowledged. Many of the formulations have been proposed for treatment of several diseases even though they are not applicable for such conditions. This is because of the lack of a systematic standard or evaluation protocol during the development of a new adhesive product. In this review, the definition of internal and external bioadhesives is given for the first time, and with a focus on internal bioadhesives, the criteria of an ideal internal bioadhesive are adequately discussed; this is followed by the review of recently developed internal bioadhesives based on different gluing mechanisms.
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Affiliation(s)
- Wenzhen Zhu
- Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637457, Singapore
| | - Yon Jin Chuah
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 637335, Singapore
| | - Dong-An Wang
- Division of Bioengineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637457, Singapore.
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Wang B, Nie Y, Ma J. The effect of bioadhesive on the interfacial compatibility and pervaporation performance of composite membranes by MD and GCMC simulation. J Mol Graph Model 2018; 80:113-120. [PMID: 29331728 DOI: 10.1016/j.jmgm.2018.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 09/18/2017] [Revised: 01/03/2018] [Accepted: 01/04/2018] [Indexed: 11/29/2022]
Abstract
Combing molecular dynamics (MD) and Grand Canonical Monte Carlo (GCMC) simulation, the effect of bioadhesive transition layer on the interfacial compatibility of the pervaporation composite membranes, and the pervaporation performance toward penetrant molecules were investigated. In our previous experimental study, the structural stability and permeability selectivity of the composite membranes were considerably enhanced by the introduction of bioadhesive carbopol (CP). In the present study, the interfacial compatibility and the interfacial energies between the chitosan (CS) separation layer, CP transition layer and the support layer were investigated, respectively. The mobility of polymer chains, free volume in bulk and interface regions were evaluated by the mean-square displacement (MSD) and free volume voids (FFV) analysis. The diffusion and sorption behavior of water/ethanol molecules in bulk and interface regions were characterized. The simulation results of membrane structure have good consistency, indicating that the introduction of CP transition layer improved the interfacial compatibility and interaction between the separation layer and the support layer. Comparing the bulk region of the separation layer, the mobility and free volume of the polymer chain in the interface region decreased and thus reduced the swelling of CS active layer, revealing the increased diffusion selectivity toward the permeated water and ethanol molecules. The strong hydrogen bonds interaction between the COOH of the CP transition layer and water molecules increased the adsorption of water molecules in the interface region. The simulation results were quite consistent with the experimental results.
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Affiliation(s)
- Baohe Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Yan Nie
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Jing Ma
- Key Laboratory for Green Chemical Technology of Ministry of Education, R&D Center for Petrochemical Technology, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, China.
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Kokubun T. Occurrence of myo-inositol and alkyl-substituted polysaccharide in the prey-trapping mucilage of Drosera capensis. Naturwissenschaften 2017; 104:83. [PMID: 28940006 PMCID: PMC5610204 DOI: 10.1007/s00114-017-1502-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Revised: 08/29/2017] [Accepted: 09/01/2017] [Indexed: 11/25/2022]
Abstract
The chemical composition of the exudate mucilage droplets of the carnivorous plant Drosera capensis was investigated using nuclear magnetic resonance spectroscopy. The mucilage was found to contain beside a very large molecular weight polysaccharide a significant amount of myo-inositol. It appears that myo-inositol escaped detection due to the commonly applied methodology on the chemical analysis of plant mucilage, such as dialysis, precipitation of polysaccharide component with alcohol, acid hydrolysis and detection of the resultant monosaccharide (aldose) units. The possible functions of myo-inositol in the mucilage droplets and the fate after being washed off from the leaf tentacles are proposed. On the polysaccharide component, the presence of methyl ester and alkyl chain-like moieties could be confirmed. These lipophilic moieties may provide the prey-trapping mucilage with the unique adhesive property onto the hydrophobic insect body parts, as well as onto the nature's well-known superhydrophobic surfaces such as the leaves of the sacred lotus plants. A re-evaluation of the mineral components of the mucilage, reported 40 years ago, is presented from the viewpoints of the current result and plants' natural habitat. A case for re-examination of the well-studied plant mucilaginous materials is made in light of the new findings.
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Affiliation(s)
- Tetsuo Kokubun
- Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AB, UK.
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44
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Greistorfer S, Klepal W, Cyran N, Gugumuck A, Rudoll L, Suppan J, von Byern J. Snail mucus - glandular origin and composition in Helix pomatia. ZOOLOGY 2017; 122:126-138. [PMID: 28554685 DOI: 10.1016/j.zool.2017.05.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [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: 12/07/2016] [Revised: 05/03/2017] [Accepted: 05/04/2017] [Indexed: 11/16/2022]
Abstract
Apart from their well-known culinary use, gastropod species such as Helix, which have a hydrogel-like mucus, are increasingly being exploited for cosmetic, bioengineering and medical applications. However, not only are the origin and composition of these "sticky" secretions far from being fully characterized, the number and morphology of the mucus glands involved is also uncertain. This study aims to characterize in detail the cutaneous glands of the Helix pomatia foot on morphological, histochemical and immunohistochemical levels. Hereby the focus is on the gland position and appearance on the foot sole as well as on the chemical nature of the different gland secretions. At least five different gland types can be distinguished by their microanatomy; three are located on the dorsal side and two on the ventral side of the foot sole. Most glands are reactive for acidic proteins and sugars such as mannose and fucose, indicating the presence of acidic glycosaminoglycans. One dorsal gland type shows high reactivity for acidic proteins only. The isolated mucus includes a certain amount of the elements chlorine, potassium and calcium; evidence for lipids was also confirmed in the isolated mucus. The present results for Helix pomatia show a clear difference in the number of glands compared to the related species Helix aspersa (only four mucus glands); histochemically, the glands of both species similarly produce acidic proteins as well as acidic glycosaminoglycans. While calcium ions are known to play a role in mucus formation, the presence and function of other ions such as potassium still need to be clarified.
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Affiliation(s)
- Sophie Greistorfer
- Core Facility Cell Imaging and Ultrastructure Research, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
| | - Waltraud Klepal
- Core Facility Cell Imaging and Ultrastructure Research, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
| | - Norbert Cyran
- Core Facility Cell Imaging and Ultrastructure Research, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
| | - Andreas Gugumuck
- Wiener Schneckenmanufaktur e.U., Rosiwalgasse 44, A-1100 Vienna, Austria
| | - Livia Rudoll
- Department of Integrative Zoology, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
| | - Johannes Suppan
- Department of Trauma Surgery, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria
| | - Janek von Byern
- Core Facility Cell Imaging and Ultrastructure Research, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria; Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Austrian Cluster for Tissue Regeneration, Donaueschingenstrasse 13, A-1200 Vienna, Austria.
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45
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Stewart RJ, Wang CS, Song IT, Jones JP. The role of coacervation and phase transitions in the sandcastle worm adhesive system. Adv Colloid Interface Sci 2017; 239:88-96. [PMID: 27393642 PMCID: PMC5182194 DOI: 10.1016/j.cis.2016.06.008] [Citation(s) in RCA: 95] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 06/03/2016] [Accepted: 06/10/2016] [Indexed: 01/17/2023]
Abstract
Sandcastle worms, Phragmatopoma californica (Fewkes), live along the western coast of North America. Individual worms build tubular shells under seawater by gluing together sandgrains and biomineral particles with a multipart, rapid-set, self-initiating adhesive. The glue comprises distinct sets of condensed, oppositely charged polyelectrolytic components-polyphosphates, polysulfates, and polyamines-that are separately granulated and stored at high concentration in distinct cell types. The pre-organized adhesive modules are secreted separately and intact, but rapidly fuse with minimal mixing and expand into a crack-penetrating complex fluid. Within 30s of secretion into seawater, the fluid adhesive transitions (sets) into a porous solid adhesive joint. The nano- and microporous structure of the foamy solid adhesive contributes to the strength and toughness of the adhesive joint through several mechanisms. A curing agent (catechol oxidase), co-packaged into both types of adhesive granules, covalently cross-links the adhesive and becomes a structural component of the final adhesive joint. The overall effectiveness of the granulated sandcastle glue is more a product of the cellular sorting and packaging mechanisms, the transition from fluid to solid following secretion, and its final biphasic porous structure as it is of its composition or any particular amino acid modification.
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Affiliation(s)
- Russell J Stewart
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA.
| | - Ching Shuen Wang
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA
| | - In Taek Song
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA
| | - Joshua P Jones
- Department of Bioengineering, University of Utah, Salt Lake City, UT 84112, USA
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Tan G, Yu S, Pan H, Li J, Liu D, Yuan K, Yang X, Pan W. Bioadhesive chitosan-loaded liposomes: A more efficient and higher permeable ocular delivery platform for timolol maleate. Int J Biol Macromol 2017; 94:355-63. [PMID: 27760378 DOI: 10.1016/j.ijbiomac.2016.10.035] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 09/30/2016] [Accepted: 10/14/2016] [Indexed: 01/02/2023]
Abstract
The aim of this study was to develop and characterize a novel colloidal system, namely, timolol maleate chitosan coated liposomes (TM-CHL) to enhance the ocular permeation, precorneal residence time and bioavailability. The resulting TM-CHL was the most promising formulation with a mean particle size of 150.7nm and an EE% of 75.83±1.61%. In vitro release of the TM-CHL showed an extended drug release profile. The TM-CHL exhibited significant mucin adhesion and compared with commercial eye drops, TM-CHL produced a 3.18-fold increase in the apparent permeability coefficient (Papp), resulting in a significant enhancement of corneal permeation. In addition, the gamma scintigraphic study and the pharmacokinetic study showed that TM-CHL could be retained at the corneal surface for longer time compared with eye drops. The ocular irritation study indicated that the developed liposomes produced no significant irritant effects. Furthermore, pharmacodynamics results showed that the maximum intraocular pressure(IOP) produced by TM-CHL was (19.67±1.14) mmHg compared with the (23.80±1.49) mmHg for TM eye drops, revealing that TM-CHL was more effective in reducing the IOP. These results demonstrate that CHL is a potentially useful carrier for ocular drug delivery, which could improve the efficacy of TM.
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Wiltsey C, Christiani T, Williams J, Scaramazza J, Van Sciver C, Toomer K, Sheehan J, Branda A, Nitzl A, England E, Kadlowec J, Iftode C, Vernengo J. Thermogelling bioadhesive scaffolds for intervertebral disk tissue engineering: preliminary in vitro comparison of aldehyde-based versus alginate microparticle-mediated adhesion. Acta Biomater 2015; 16:71-80. [PMID: 25641647 DOI: 10.1016/j.actbio.2015.01.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Revised: 01/10/2015] [Accepted: 01/20/2015] [Indexed: 01/08/2023]
Abstract
Tissue engineering of certain load-bearing parts of the body can be dependent on scaffold adhesion or integration with the surrounding tissue to prevent dislocation. One such area is the regeneration of the intervertebral disc (IVD). In this work, poly(N-isopropylacrylamide) (PNIPAAm) was grafted with chondroitin sulfate (CS) (PNIPAAm-g-CS) and blended with aldehyde-modified CS to generate an injectable polymer that can form covalent bonds with tissue upon contact. However, the presence of the reactive aldehyde groups can compromise the viability of encapsulated cells. Thus, liposomes were encapsulated in the blend, designed to deliver the ECM derivative, gelatin, after the polymer has adhered to tissue and reached physiological temperature. This work is based on the hypothesis that the discharge of gelatin will enhance the biocompatibility of the material by covalently reacting with, or "end-capping", the aldehyde functionalities within the gel that did not participate in bonding with tissue upon contact. As a comparison, formulations were also created without CS aldehyde and with an alternative adhesion mediator, mucoadhesive calcium alginate particles. Gels formed from blends of PNIPAAm-g-CS and CS aldehyde exhibited increased adhesive strength compared to PNIPAAm-g-CS alone (p<0.05). However, the addition of gelatin-loaded liposomes to the blend significantly decreased the adhesive strength (p<0.05). The encapsulation of alginate microparticles within PNIPAAm-g-CS gels caused the tensile strength to increase twofold over that of PNIPAAm-g-CS blends with CS aldehyde (p<0.05). Cytocompatibility studies indicate that formulations containing alginate particles exhibit reduced cytotoxicity over those containing CS aldehyde. Overall, the results indicated that the adhesives composed of alginate microparticles encapsulated in PNIPAAm-g-CS have the potential to serve as a scaffold for IVD regeneration.
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48
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Anderson J, Lin MH, Privette C, Flowers M, Murley M, Lee BP, Ong KG. Wireless magnetoelastic sensors for tracking degradation profiles of nitrodopamine-modified poly(ethylene glycol). Scijet 2015; 4:200638556. [PMID: 25710000 PMCID: PMC4335653] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A critical property for tissue adhesives is a controllable degradation rate so that these adhesives do not act as barriers to wound healing. Typical degradation tests require large amount of samples, which can be tedious and expensive to perform. Additionally, current degradation tests are carried out in vitro under simulated physiological conditions and may not accurately reflect the complex environment that an adhesive would experience in vivo. As a means to develop a simple technique for testing tissue adhesive, a rapidly degrading adhesive hydrogel that mimics mussel adhesive proteins was coated onto magnetoelastic (ME) sensor strips to track the degradation of the adhesive remotely and in real time. Adhesive-coated ME sensors were submerged in phosphate buffer saline solution (pH 7.4) at body temperature (37 °C). Based on the change in the resonant amplitude, the degradation time was determined to be 22 min, which was in agreement with qualitative monitoring of the bulk adhesive hydrogel. Additionally, when the adhesive-coated ME sensor was incubated in a slightly acidic medium (pH 5.7), the degradation rate was drastically lengthened (3 hrs) as the hydrolysis of ester bonds is faster under basic conditions. Oscillatory rheological testing confirmed the formation and degradation of the adhesive. However, rheological test results did not accurately reflect the degradation rate of the adhesive hydrogel, potentially due to a slow exchange of acidic degradation products with the surrounding medium. ME sensor was demonstrated as a potential useful tool for evaluating the degradation rate of bioadhesives.
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Affiliation(s)
| | | | | | | | | | - Bruce P. Lee
- Authors for correspondence: Bruce P. Lee, , Keat Ghee Ong,
| | - Keat Ghee Ong
- Authors for correspondence: Bruce P. Lee, , Keat Ghee Ong,
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Abstract
The aim of this research was to formulate a liposomal preparation of DOX to be applied topically, and to investigate the in vitro and in vivo performance of the prepared liposomes. DOX liposomes were prepared by the solvent evaporation method, and then modified with bioadhesive material HA. Through MTT assay, we found that the safe concentration of liposomes delivered would hit 1 mg/mL. Cellular uptake studies showed that DOX liposomes coated with HA are much more targetable to cell nucleus. Their ocular pharmacokinetics in rabbits were investigated through the comparison with those obtained after dosing with non-modified liposomes and DOX solution. The in vitro transcorneal permeability of DOX in both kinds of liposomes was found to be slower than that of the solution because of sustained release. After in vivo instillation in rabbits, HA-modified liposomes had the longest retention time, following with naked liposomes. Significantly, the area under the curve of the aqueous humor concentration-time profiles of DOX liposomes was found to be 1.7-fold higher than that of DOX solution. The confocal experiment confirmed that HA-modified liposomes were able to maintain a higher DOX concentration and residence time than that of non-modified liposomes and free DOX. These results suggest that our liposomal preparation was of great help to improve the bioavailability of DOX.
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Affiliation(s)
- Jing Lin
- a Department of Pharmaceutics, School of Pharmaceutical Science , Xiamen University , Xiamen , Fujian , China
| | - Hongjie Wu
- a Department of Pharmaceutics, School of Pharmaceutical Science , Xiamen University , Xiamen , Fujian , China
| | - Yingjun Wang
- a Department of Pharmaceutics, School of Pharmaceutical Science , Xiamen University , Xiamen , Fujian , China
| | - Jianhong Lin
- a Department of Pharmaceutics, School of Pharmaceutical Science , Xiamen University , Xiamen , Fujian , China
| | - Qing Chen
- a Department of Pharmaceutics, School of Pharmaceutical Science , Xiamen University , Xiamen , Fujian , China
| | - Xuan Zhu
- a Department of Pharmaceutics, School of Pharmaceutical Science , Xiamen University , Xiamen , Fujian , China
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50
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Akbari J, Saeedi M, Morteza-Semnani K, Kelidari H, Lashkari M. Formulation and characterization of cetylpyridinium chloride bioadhesive tablets. Adv Pharm Bull 2014; 4:385-90. [PMID: 25436196 DOI: 10.5681/apb.2014.057] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 02/26/2014] [Accepted: 03/15/2014] [Indexed: 11/17/2022] Open
Abstract
PURPOSE Bioadhesive polymers play an important role in biomedical and drug delivery applications. The aim of this study is to develop a sustained- release tablet for local application of Cetylpyridinium Chloride (CPC). This delivery system would supply the drug at an effective level for a long period of time, and thereby overcome the problem of the short retention time of CPC and could be used for buccal delivery as a topical anti-infective agent. METHODS CPC bioadhesive tablets were directly prepared using 7 mm flat-faced punches on a hydraulic press. The materials for each tablet were weighted, introduced into the die and compacted at constant compression pressure. The dissolution tests were performed to the rotation paddle method and the bioadhesive strength of the tablets were measured. RESULTS The results showed that as the concentration of polymer increased, the drug release rate was decreased. Also the type and ratio of polymers altered the release kinetic of Cetylpyridinium Chloride from investigated tablets. The bioadhesion strength increased with increasing the concentration of polymer and maximum bioadhesion strength was observed with HPMC K100M. CONCLUSION The selected formulation of CPC bioadhesive tablet can be used as a suitable preparation for continuous release of CPC with appropriate bioadhesion strength.
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Affiliation(s)
- Jafar Akbari
- Department of pharmaceutics, Faculty of pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Majid Saeedi
- Department of pharmaceutics, Faculty of pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Katayoun Morteza-Semnani
- Department of medicinal chemistry, Faculty of pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
| | - Hamidreza Kelidari
- Pharmaceutical Sciences Research Center, Mazandaran University of Medical Sciences, Sari, Iran
| | - Maryam Lashkari
- Department of pharmaceutics, Faculty of pharmacy, Mazandaran University of Medical Sciences, Sari, Iran
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