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Jay JW, Palackic A, Prasai A, Seigel Q, Siddiqui R, Bergman I, Wolf SE, Wilkerson MG, El Ayadi A. Photoactivated rose bengal mitigates a fibrotic phenotype and improves cutaneous wound healing in full-thickness injuries. Wound Repair Regen 2024. [PMID: 39109695 DOI: 10.1111/wrr.13202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 06/02/2024] [Accepted: 06/10/2024] [Indexed: 09/21/2024]
Abstract
Healing of deep cutaneous wounds often results in detrimental sequelae, including painful and debilitating scars. Current therapies for full-thickness injuries that target specific phases of wound healing have moderate success; however, full resolution remains incomplete and negative consequences persist if skin homeostasis is not achieved. Photoactivated molecules can modulate cellular responses by generating reactive oxygen species and may provide a novel therapeutic option to improve wound healing. In the current study, we investigated the effects of Rose bengal (RB) dye in a preclinical model of full-thickness cutaneous injury. Monochromatic green light activates RB to generate ROS in the presence of oxygen, subsequently crosslinking collagen fibrils. In in vitro studies, we show that photoactivated RB is well tolerated by epidermal keratinocytes and dermal fibroblasts and can mitigate fibrotic signalling by downregulating collagen production. In a murine model of full-thickness injury, topically-applied and photoactivated RB closed wounds faster than control and vehicle treatments and showed significantly improved wound healing outcomes, including enhanced early granulation, better collagen organisation and increased vascularity in the presence of protracted tissue ROS. These data support an overall improved cutaneous wound healing profile after RB phototherapy and warrant further investigations into this versatile molecule.
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Affiliation(s)
- Jayson W Jay
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas, USA
| | - Alen Palackic
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas, USA
- Department of Hand, Plastic and Reconstructive Surgery, Burn Center, BG Trauma Center Ludwigshafen, University of Heidelberg, Ludwigshafen, Germany
| | - Anesh Prasai
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas, USA
| | - Quincy Seigel
- School of Medicine, University of Texas Medical Branch, Galveston, Texas, USA
| | - Raima Siddiqui
- School of Medicine, Texas College of Osteopathic Medicine, Fort Worth, Texas, USA
| | - Isabelle Bergman
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas, USA
| | - Steven E Wolf
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas, USA
| | - Michael G Wilkerson
- Department of Dermatology, University of Texas Medical Branch, Galveston, Texas, USA
| | - Amina El Ayadi
- Department of Surgery, University of Texas Medical Branch, Galveston, Texas, USA
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Rose Bengal-Modified Upconverting Nanoparticles: Synthesis, Characterization, and Biological Evaluation. Life (Basel) 2022; 12:life12091383. [PMID: 36143419 PMCID: PMC9502678 DOI: 10.3390/life12091383] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 08/26/2022] [Accepted: 08/29/2022] [Indexed: 12/02/2022] Open
Abstract
High-quality upconverting NaYF4:Yb3+,Er3+ nanoparticles (UCNPs; 26 nm in diameter) based on lanthanides were synthesized by a high-temperature coprecipitation method. The particles were modified by bisphosphonate-terminated poly(ethylene glycol) (PEG) and Rose Bengal (RB) photosensitizer. The particles were thoroughly characterized using transmission electron microscopy, dynamic light scattering, thermogravimetric analysis, FTIR, and X-ray photoelectron and upconversion luminescence spectroscopy in terms of morphology, hydrodynamic size, composition, and energy transfer to the photosensitizer. Moreover, the singlet oxygen generation from RB-containing UCNPs was investigated using 9,10-diphenylanthracene probe under 980 nm excitation. The cytotoxicity of UCNPs before and after conjugation with RB was evaluated on highly sensitive rat mesenchymal stem cells (rMSCs) and significant differences were found. Correspondingly, consi-derable variations in viability were revealed between the irradiated and non-irradiated rat glioma cell line (C6) exposed to RB-conjugated UCNPs. While the viability of rMSCs was not affected by the presence of UCNPs themselves, the cancer C6 cells were killed after the irradiation at 980 nm due to the reactive oxygen species (ROS) production, thus suggesting the potential of RB-conjugated PEG-modified UCNPs for applications in photodynamic therapy of cancer.
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Adnane F, El-Zayat E, Fahmy HM. The combinational application of photodynamic therapy and nanotechnology in skin cancer treatment: A review. Tissue Cell 2022; 77:101856. [DOI: 10.1016/j.tice.2022.101856] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 06/11/2022] [Accepted: 06/11/2022] [Indexed: 02/07/2023]
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Bartusik-Aebisher D, Ożóg Ł, Domka W, Aebisher D. Rose Bengal and Future Directions in Larynx Tumor Photodynamic Therapy †. Photochem Photobiol 2021; 97:1445-1452. [PMID: 34287926 DOI: 10.1111/php.13488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/20/2021] [Accepted: 07/16/2021] [Indexed: 11/29/2022]
Abstract
Photodynamic Therapy (PDT) seems to be a promising method in the treatment of larynx tumor tissues. The aim of the present analysis was the study of photosensitizer penetration of larynx tissue associated with the application of PDT in vitro. This study is based on the use of photosensitive compounds Rose Bengal (RB) that selectively accumulate in larynx tissue. The selection of the study group of patients who will undergo surgery in accordance with medical principles was of key importance for the project. Histopathological examination of samples subjected to PDT revealed numerous changes in the morphology of the cancer cells and surrounding tissues. After PDT treatment, the number of tumor cells decreased compared with the cells number before PDT and the arrangement was relatively loose. After PDT with RB the nuclei morphology was incomplete and fragmented. The effects of the applied PDT of larynx in vitro were assessed under an optical microscope. The future directions in larynx tumor PDT with the use of upconversion nanoparticles (UPCNP) is also discussed.
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Affiliation(s)
| | - Łukasz Ożóg
- Medical College of The University of Rzeszow, University of Rzeszów, Rzeszów, Poland
| | - Wojciech Domka
- Medical College of The University of Rzeszow, University of Rzeszów, Rzeszów, Poland
| | - David Aebisher
- Medical College of The University of Rzeszow, University of Rzeszów, Rzeszów, Poland
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Simões JCS, Sarpaki S, Papadimitroulas P, Therrien B, Loudos G. Conjugated Photosensitizers for Imaging and PDT in Cancer Research. J Med Chem 2020; 63:14119-14150. [PMID: 32990442 DOI: 10.1021/acs.jmedchem.0c00047] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Early cancer detection and perfect understanding of the disease are imperative toward efficient treatments. It is straightforward that, for choosing a specific cancer treatment methodology, diagnostic agents undertake a critical role. Imaging is an extremely intriguing tool since it assumes a follow up to treatments to survey the accomplishment of the treatment and to recognize any conceivable repeating injuries. It also permits analysis of the disease, as well as to pursue treatment and monitor the possible changes that happen on the tumor. Likewise, it allows screening the adequacy of treatment and visualizing the state of the tumor. Additionally, when the treatment is finished, observing the patient is imperative to evaluate the treatment methodology and adjust the treatment if necessary. The goal of this review is to present an overview of conjugated photosensitizers for imaging and therapy.
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Affiliation(s)
- João C S Simões
- Institute of Chemistry, University of Neuchatel, Avenue de Bellevaux 51, CH-2000 Neuchatel, Switzerland.,BioEmission Technology Solutions, Alexandras Avenue 116, 11472 Athens, Greece
| | - Sophia Sarpaki
- BioEmission Technology Solutions, Alexandras Avenue 116, 11472 Athens, Greece
| | | | - Bruno Therrien
- Institute of Chemistry, University of Neuchatel, Avenue de Bellevaux 51, CH-2000 Neuchatel, Switzerland
| | - George Loudos
- BioEmission Technology Solutions, Alexandras Avenue 116, 11472 Athens, Greece
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Abstract
To stop blood loss and accelerate wound healing, conventional wound closure techniques such as sutures and staples are currently used in the clinic. These tissue-piercing wound closure techniques have several disadvantages such as the potential for causing inflammation, infections, and scar formation. Surgical sealants and tissue adhesives can address some of the disadvantages of current sutures and staples. An ideal tissue adhesive will demonstrate strong interfacial adhesion and cohesive strength to wet tissue surfaces. Most reported studies rely on the liquid-to-solid transition of organic molecules by taking advantage of polymerization and crosslinking reactions for improving the cohesive strength of the adhesives. Crosslinking reactions triggered using light are commonly used for increasing tissue adhesive strength since the reactions can be controlled spatially and temporally, providing the on-demand curing of the adhesives with minimum misplacements. In this review, we describe the recent advances in the field of naturally derived tissue adhesives and sealants in which the adhesive and cohesive strengths are modulated using photochemical reactions.
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Hawkins CL, Davies MJ. Detection, identification, and quantification of oxidative protein modifications. J Biol Chem 2019; 294:19683-19708. [PMID: 31672919 PMCID: PMC6926449 DOI: 10.1074/jbc.rev119.006217] [Citation(s) in RCA: 212] [Impact Index Per Article: 42.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Exposure of biological molecules to oxidants is inevitable and therefore commonplace. Oxidative stress in cells arises from both external agents and endogenous processes that generate reactive species, either purposely (e.g. during pathogen killing or enzymatic reactions) or accidentally (e.g. exposure to radiation, pollutants, drugs, or chemicals). As proteins are highly abundant and react rapidly with many oxidants, they are highly susceptible to, and major targets of, oxidative damage. This can result in changes to protein structure, function, and turnover and to loss or (occasional) gain of activity. Accumulation of oxidatively-modified proteins, due to either increased generation or decreased removal, has been associated with both aging and multiple diseases. Different oxidants generate a broad, and sometimes characteristic, spectrum of post-translational modifications. The kinetics (rates) of damage formation also vary dramatically. There is a pressing need for reliable and robust methods that can detect, identify, and quantify the products formed on amino acids, peptides, and proteins, especially in complex systems. This review summarizes several advances in our understanding of this complex chemistry and highlights methods that are available to detect oxidative modifications-at the amino acid, peptide, or protein level-and their nature, quantity, and position within a peptide sequence. Although considerable progress has been made in the development and application of new techniques, it is clear that further development is required to fully assess the relative importance of protein oxidation and to determine whether an oxidation is a cause, or merely a consequence, of injurious processes.
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Affiliation(s)
- Clare L Hawkins
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen 2200, Denmark
| | - Michael J Davies
- Department of Biomedical Sciences, Panum Institute, University of Copenhagen, Copenhagen 2200, Denmark
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Aljarrah K, Al-Akhras MA, Al-Khalili DJ, Ababneh Z. The feasibility of using Saffron to reduce the photosensitivity reaction of selected photosensitizers using red blood cells and staphylococcusAureus bacteria as targets. Photodiagnosis Photodyn Ther 2019; 29:101590. [PMID: 31689512 DOI: 10.1016/j.pdpdt.2019.101590] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 10/21/2019] [Accepted: 10/28/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND The photosensitivity reaction which appears after a Photodynamic therapy treatment session is a challenge that needs further investigation. The goal of this research is to evaluate the possibility of using saffron to reduce or control this photosensitivity reaction and to present mathematical modeling of the cell survival curves and their dependency on saffron concentration. METHODS Red blood cells (RBC) and Staphylococcus aureus Bacteria (STB) were used as targets in this study. The Photosensitivity of Rose Bengali, Methylene Blue, and Photofrin independently and incorporated with saffron was investigated for continued irradiation at different Saffron concentrations. Gompertz's function was used to fit the survival curve parameters. The 50% cell survival rate was fit to an empirical formula based on Saffron concentrations. RESULTS Saffron inhibits the photosensitivity reaction of the three photosensitizers and causes a significant increase in the 50% survival rate time (t50) for RBC`s and STB. Saffron didn't show phototoxicity when incubated alone with RBC`s and STB. The survival curve parameters of the RBCs and STB showed a good fit to the Gompertz function. Saffron concentration is related to the RBC`s t50 based on power dependency of 0.56, 0.38 and 0.31 for Photofrin, Methylene Blue and Rose Bengali respectively and 0.1 on STB for Rose Bengali. CONCLUSION Saffron can efficiently be used to reduce the photosensitivity reaction of Photosensitizers after a PDT treatment session. Gompertz function was found to be an appropriate mathematical model for survival rate curves. The t50 and the saffron concentration are well related through a power dependence empirical formula.
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Affiliation(s)
- Khaled Aljarrah
- Bio-Medical Physics Laboratory, Department of Physics, Jordan University of Science & Technology (JUST), P.O. Box 3030, Irbid 22110, Jordan.
| | - M-Ali Al-Akhras
- Bio-Medical Physics Laboratory, Department of Physics, Jordan University of Science & Technology (JUST), P.O. Box 3030, Irbid 22110, Jordan
| | | | - Zaid Ababneh
- Physics Department, Yarmouk University, Irbid 211-63, Jordan
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Wang Y, Zhu L, Zhu J, Shen N, Yao M, Yu Y. Comparison of Photochemical Crosslinking Versus Sutures for Bonding Conjunctival Grafts. Lasers Surg Med 2019; 52:543-551. [PMID: 31579958 DOI: 10.1002/lsm.23169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/20/2019] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND OBJECTIVES To explore whether Rose Bengal-induced photochemical crosslinking (RB-PCL) can be a replacement for sutures in conjunctival autograft bonding, we compared the safety, operating time, postoperative ocular signs, and inflammatory responses of RB-PCL versus nylon suturing for sealing conjunctival autografts in rabbits. STUDY DESIGN/MATERIALS AND METHODS Thirty-six New Zealand White rabbits underwent limbal conjunctival autografting using either sutures or RB-PCL to attach conjunctival autografts to the bare sclera. Animals were randomized to one of two groups (18 per group): the suture group or RB-PCL group. Photochemical crosslinking with a wavelength of 532 nm green light with an illumination intensity of 0.6 W/cm2 for 250 seconds (150 J/cm2 ) or suturing was performed followed by light examination at 3, 7, 28 days after surgery to evaluate the healing condition. Rabbits in each group were euthanized on day 3 (n = 6), 7 (n = 6), or 28 (n = 6) postoperatively, and the graft tissues from the surgical site were processed to evaluate inflammatory response by assessing protein levels of tumor necrosis factor α (TNF-α), and interleukin 6 (IL-6) as well as histological examination. Cell viability was evaluated by counting both total and dead cells on hematoxylin and eosin (H&E) stained tissue samples from both groups at 3 and 7 days after surgery. The surgery procedure time was recorded and the graft surface temperatures were measured before and after illumination. RESULTS Photochemical crosslinking effectively secured the limbal conjunctival autograft over an ocular conjunctival defect with no significant difference from the suture group. The time required for this light activated bonding method was ~550 seconds in comparison with the suture method of half hour. The differences of measured temperature on the graft surface before and after RB-PCL treatment were 2.98 ± 0.11°C. The induction of IL-6 and TNF-α protein was remarkably reduced in the RB-PCL group compared with the suture group at 3 and 7 days after surgery. Histology revealed less infiltrated neutrophils were observed in the RB-PCL group than in the suture group at 3 and 7 days postoperatively. Furthermore, the RB-PCL group showed a better healing process with less eye discharge and mild conjunctival congestion. No significant difference in percent dead cells was observed between RB-PCL and suture groups at 3 and 7 days after surgery. CONCLUSIONS RB-PCL is a promising alternative for bonding the conjunctival autograft with shorter operation time, less inflammation and better healing outcomes compared to conventional suture. Thermal damage and phototoxicity were not observed using the RB-PCL method in bonding conjunctival grafts. Lasers Surg. Med. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Yan Wang
- Department of Ophthalmology, Huadong Hospital Affiliated to Fudan University, Shanghai, 200040, China
| | - Lu Zhu
- Department of Ophthalmology, Huadong Hospital Affiliated to Fudan University, Shanghai, 200040, China
| | - Jingyin Zhu
- Department of Ophthalmology, Huadong Hospital Affiliated to Fudan University, Shanghai, 200040, China
| | - Nianci Shen
- Department of Ophthalmology, Huadong Hospital Affiliated to Fudan University, Shanghai, 200040, China
| | - Min Yao
- Department of Plastic and Reconstructive Surgery, Shanghai 9th Hospital, JiaoTong University School of Medicine, Shanghai, 201900, China
| | - Yan Yu
- RA Consulting, Changzhou, Jiangsu, 210003, China
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Redmond RW, Kochevar IE. Medical Applications of Rose Bengal‐ and Riboflavin‐Photosensitized Protein Crosslinking. Photochem Photobiol 2019; 95:1097-1115. [DOI: 10.1111/php.13126] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Accepted: 03/27/2019] [Indexed: 01/20/2023]
Affiliation(s)
- Robert W. Redmond
- Wellman Center for Photomedicine Massachusetts General Hospital Harvard Medical School Boston MA
| | - Irene E. Kochevar
- Wellman Center for Photomedicine Massachusetts General Hospital Harvard Medical School Boston MA
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Vanerio N, Stijnen M, de Mol BA, Kock LM. Biomedical Applications of Photo- and Sono-Activated Rose Bengal: A Review. PHOTOBIOMODULATION PHOTOMEDICINE AND LASER SURGERY 2019; 37:383-394. [DOI: 10.1089/photob.2018.4604] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Noemi Vanerio
- LifeTec Group BV, Eindhoven, The Netherlands
- Department of Cardiothoracic Surgery & Cardiovascular Sciences, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | | | - Bas A.J.M. de Mol
- Department of Cardiothoracic Surgery & Cardiovascular Sciences, Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Linda M. Kock
- LifeTec Group BV, Eindhoven, The Netherlands
- Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, The Netherlands
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Narayanan A, Kaur S, Peng C, Debnath D, Mishra K, Liu Q, Dhinojwala A, Joy A. Viscosity Attunes the Adhesion of Bioinspired Low Modulus Polyester Adhesive Sealants to Wet Tissues. Biomacromolecules 2019; 20:2577-2586. [DOI: 10.1021/acs.biomac.9b00383] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amal Narayanan
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Sukhmanjot Kaur
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Chao Peng
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Dibyendu Debnath
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Kaushik Mishra
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Qianhui Liu
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Ali Dhinojwala
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
| | - Abraham Joy
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325, United States
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Frost SJ, Mawad D, Wuhrer R, Myers S, Lauto A. Semitransparent bandages based on chitosan and extracellular matrix for photochemical tissue bonding. Biomed Eng Online 2018; 17:7. [PMID: 29357892 PMCID: PMC5778659 DOI: 10.1186/s12938-018-0444-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2017] [Accepted: 01/16/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Extracellular matrices (ECMs) are often used in reconstructive surgery to enhance tissue regeneration and remodeling. Sutures and staples are currently used to fix ECMs to tissue although they can be invasive devices. Other sutureless and less invasive techniques, such as photochemical tissue bonding, cannot be coupled to ECMs because of their intrinsic opacity to light. RESULTS We succeeded in fabricating a biocompatible and adhesive device that is based on ovine forestomach matrix (OFM) and a chitosan adhesive. The natural opacity of the OFM has been overcome by adding the adhesive into the matrix that allows for the light to effectively penetrate through it. The OFM-chitosan device is semitransparent (attenuation length ~ 106 µm) and can be photoactivated by green light to bond to tissue. This device does not require sutures or staples and guarantees a bonding strength of ~ 23 kPa. CONCLUSIONS A new semitransparent and biocompatible bandage has been successfully fabricated and characterized for sutureless tissue bonding.
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Affiliation(s)
- Samuel J Frost
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Damia Mawad
- School of Materials Science and Engineering, UNSW Sydney, Sydney, NSW, 2052, Australia.,Australian Centre for NanoMedicine and ARC Centre of Excellence in Convergent BioNano Science and Technology, UNSW Sydney, Sydney, NSW, 2052, Australia.,Centre for Advanced Macromolecular Design, UNSW Sydney, Sydney, NSW, 2052, Australia
| | - Richard Wuhrer
- Advanced Materials Characterization Facility (AMCF), Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Simon Myers
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia.,School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Antonio Lauto
- School of Science and Health, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia. .,School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia. .,Biomedical Engineering & Neuroscience Research Group, The MARCS Institute, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia.
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14
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An intraluminal stent facilitates light-activated vascular anastomosis. J Trauma Acute Care Surg 2017; 83:S43-S49. [DOI: 10.1097/ta.0000000000001487] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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15
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Pupkaite J, Ahumada M, Mclaughlin S, Temkit M, Alaziz S, Seymour R, Ruel M, Kochevar I, Griffith M, Suuronen EJ, Alarcon EI. Collagen-Based Photoactive Agent for Tissue Bonding. ACS APPLIED MATERIALS & INTERFACES 2017; 9:9265-9270. [PMID: 28282110 DOI: 10.1021/acsami.7b01984] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Using a combination of methacrylated collagen and the photosensitizer rose Bengal, a new light-activated biomimetic material for tissue sutureless bonding was developed. This formulation was cross-linked using green light. In vivo tests in mice demonstrate the suitability of the material for sutureless wound closure.
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Affiliation(s)
- Justina Pupkaite
- Division of Cardiac Surgery, University of Ottawa Heart Institute , 40 Ruskin Street, Ottawa, Canada
- Department of Clinical and Experimental Medicine, Linköping University , Linköping, Sweden
| | - Manuel Ahumada
- Division of Cardiac Surgery, University of Ottawa Heart Institute , 40 Ruskin Street, Ottawa, Canada
| | - Sarah Mclaughlin
- Division of Cardiac Surgery, University of Ottawa Heart Institute , 40 Ruskin Street, Ottawa, Canada
| | - Maha Temkit
- Division of Cardiac Surgery, University of Ottawa Heart Institute , 40 Ruskin Street, Ottawa, Canada
| | - Sura Alaziz
- Division of Cardiac Surgery, University of Ottawa Heart Institute , 40 Ruskin Street, Ottawa, Canada
| | - Richard Seymour
- Division of Cardiac Surgery, University of Ottawa Heart Institute , 40 Ruskin Street, Ottawa, Canada
| | - Marc Ruel
- Division of Cardiac Surgery, University of Ottawa Heart Institute , 40 Ruskin Street, Ottawa, Canada
| | - Irene Kochevar
- Wellman Center for Photomedicine, Massachusetts General Hospital, Harvard Medical School , Boston, United States
| | - May Griffith
- Department of Clinical and Experimental Medicine, Linköping University , Linköping, Sweden
| | - Erik J Suuronen
- Division of Cardiac Surgery, University of Ottawa Heart Institute , 40 Ruskin Street, Ottawa, Canada
| | - Emilio I Alarcon
- Division of Cardiac Surgery, University of Ottawa Heart Institute , 40 Ruskin Street, Ottawa, Canada
- Department of Biochemistry, Microbiology, and Immunology, Faculty of Medicine, University of Ottawa , Ottawa, Canada
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Abstract
Tissue adhesives have been introduced as a promising alternative for the traditional wound closure method of suturing.
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Affiliation(s)
| | - Wen Zhong
- Department of Biosystem Engineering
- University of Manitoba
- Canada
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Abstract
Photodynamic therapy (PDT) was discovered more than 100 years ago, and has since become a well-studied therapy for cancer and various non-malignant diseases including infections. PDT uses photosensitizers (PSs, non-toxic dyes) that are activated by absorption of visible light to initially form the excited singlet state, followed by transition to the long-lived excited triplet state. This triplet state can undergo photochemical reactions in the presence of oxygen to form reactive oxygen species (including singlet oxygen) that can destroy cancer cells, pathogenic microbes and unwanted tissue. The dual-specificity of PDT relies on accumulation of the PS in diseased tissue and also on localized light delivery. Tetrapyrrole structures such as porphyrins, chlorins, bacteriochlorins and phthalocyanines with appropriate functionalization have been widely investigated in PDT, and several compounds have received clinical approval. Other molecular structures including the synthetic dyes classes as phenothiazinium, squaraine and BODIPY (boron-dipyrromethene), transition metal complexes, and natural products such as hypericin, riboflavin and curcumin have been investigated. Targeted PDT uses PSs conjugated to antibodies, peptides, proteins and other ligands with specific cellular receptors. Nanotechnology has made a significant contribution to PDT, giving rise to approaches such as nanoparticle delivery, fullerene-based PSs, titania photocatalysis, and the use of upconverting nanoparticles to increase light penetration into tissue. Future directions include photochemical internalization, genetically encoded protein PSs, theranostics, two-photon absorption PDT, and sonodynamic therapy using ultrasound.
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Characterisation of a novel light activated adhesive scaffold: Potential for device attachment. J Mech Behav Biomed Mater 2016; 62:433-445. [PMID: 27281161 DOI: 10.1016/j.jmbbm.2016.05.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Revised: 05/20/2016] [Accepted: 05/23/2016] [Indexed: 11/20/2022]
Abstract
The most common methods for attaching a device to the internal tissues of the human body are via sutures, clips or staples. These attachment techniques require penetration and manipulation of the tissue. Tears and leaks can often be a complication post-attachment, and scarring usually occurs around the attachment sites. To resolve these issues, it is proposed to develop a soft tissue scaffold impregnated with Rose Bengal/Chitosan solution (RBC-scaffold, 0.01% w/v Rose Bengal, 1.7% w/v Medium Molecular Weight Chitosan). This scaffold will initially attach to the tissue via a light activation method. The light activates the dye in the scaffold which causes cross-links to form between the scaffold and tissue, thus adhering them together. This is done without mechanically manipulating the surrounding tissue, thus avoiding the issues associated with current techniques. Eventually, the scaffold will be resorbed and tissue will integrate for long-term attachment. A variety of tests were performed to characterise the RBC-scaffold. Porosity, interconnectivity, and mechanical strength were measured. Light activation was performed with a broad spectrum (380-780nm) 10W LED lamp exposed to various time lengths (2-15min, Fluence range 0.4-3J/cm(2) ). Adhesive strength of the light-activated bond was measured with lap-shear tests performed on porcine stomach tissue. Cell culture viability was also assessed to confirm tissue integration potential. These properties were compared to Variotis™, an aliphatic polyester soft tissue scaffold which has proven to be viable for soft tissue regeneration. The RBC-scaffolds were found to have high porosity (86.46±2.95%) and connectivity, showing rapid fluid movement. The elastic modulus of the RBC-scaffolds (3.55±1.28MPa) was found to be significantly higher than the controls (0.15±0.058MPa, p<0.01) and approached reported values for human gastrointestinal tissue (2.3MPa). The maximum adhesion strength achieved of the RBC-scaffolds was 8.61±2.81kPa after 15min of light activation, this is comparable to the adhesion strength of fibrin glue on scaffolds. Cell attachment was seen to be similar to the controls, but cells appeared to have better cell survivability. In conclusion, the RBC-scaffolds show promise for use as a novel light activated attachment device with potential applications in attaching an anti-reflux valve in the lower oesophagus and also in wound healing applications for stomach ulcers.
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Frost SJ, Mawad D, Hook J, Lauto A. Micro- and Nanostructured Biomaterials for Sutureless Tissue Repair. Adv Healthc Mater 2016; 5:401-14. [PMID: 26725593 DOI: 10.1002/adhm.201500589] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2015] [Revised: 09/23/2015] [Indexed: 01/01/2023]
Abstract
Sutureless procedures for wound repair and closure have recently integrated nanostructured devices to improve their effectiveness and clinical outcome. This review highlights the major advances in gecko-inspired bioadhesives that relies mostly on van der Waals bonding forces. These are challenged by the moist environment of surgical settings that weaken adherence to tissue. The incorporation of nanoparticles in biomatrices and their role in tissue repair and drug delivery is also reviewed with an emphasis on procedures involving adhesives that are laser-activated. Nanostructured adhesive devices have the advantage of being minimally invasive to tissue, can seal wounds, and deliver drugs in situ. All these tasks are very difficult to accomplish by sutures or staples that are invasive to host organs and often cause scarring.
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Affiliation(s)
- Samuel J. Frost
- School of Science and Health; University of Western Sydney; Penrith NSW 2751 Australia
| | - D. Mawad
- Department of Materials; Imperial College London; SW7 2AZ UK
- School of Materials Science and Engineering; University of New South Wales; Sydney 2052 Australia
| | - J. Hook
- School of Chemistry; University of New South Wales; Sydney 2052 Australia
| | - Antonio Lauto
- School of Science and Health; University of Western Sydney; Penrith NSW 2751 Australia
- The Biomedical Engineering and Neuroscience (BENS) Research Group; The MARCS Institute; Penrith NSW 2751 Australia
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Ghogare AA, Miller JM, Mondal B, Lyons AM, Cengel KA, Busch TM, Greer A. Fluorinated Photodynamic Therapy Device Tips and their Resistance to Fouling for In Vivo Sensitizer Release. Photochem Photobiol 2016; 92:166-72. [PMID: 26451683 PMCID: PMC4839978 DOI: 10.1111/php.12538] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 09/17/2015] [Indexed: 01/10/2023]
Abstract
We describe progress on a one-step photodynamic therapy (PDT) technique that is simple: device tip delivery of sensitizer, oxygen and light simultaneously. Control is essential for their delivery to target sites to generate singlet oxygen. One potential problem is the silica device tip may suffer from biomaterial fouling and the pace of sensitizer photorelease is slowed. Here, we have used biomaterial (e.g. proteins, cells, etc.) from SQ20B head and neck tumors and whole blood for an assessment of fouling of the silica tips by adsorption. It was shown that by exchanging the native silica tip for a fluorinated tip, a better nonstick property led to an increased sensitizer output by ~10%. The fluorinated tip gave a sigmoidal photorelease where singlet oxygen is stabilized to physical quenching, whereas the native silica tip with unprotected SiO-H groups gave a slower (pseudolinear) photorelease. A further benefit from fluorinated silica is that 15% less biomaterial adheres to its surface compared to native silica based on a bicinchoninic acid assay (BCA) and X-ray photoelectron spectroscopy (XPS) measurements. We discuss how the fluorination of the device tip increases biofouling resistance and can contribute to a new pointsource PDT tool.
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Affiliation(s)
- Ashwini A. Ghogare
- Department of Chemistry and Graduate Center, Brooklyn College, City University of New York, Brooklyn, New York, 11210, United States
| | - Joann M. Miller
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Bikash Mondal
- Department of Chemistry and Graduate Center, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
| | - Alan M. Lyons
- Department of Chemistry and Graduate Center, College of Staten Island, City University of New York, Staten Island, New York 10314, United States
| | - Keith A. Cengel
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Theresa M. Busch
- Department of Radiation Oncology, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Alexander Greer
- Department of Chemistry and Graduate Center, Brooklyn College, City University of New York, Brooklyn, New York, 11210, United States
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