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Lee RT, Surenkok G, Zayas V. Mitigating the affective and cognitive consequences of social exclusion: an integrative data analysis of seven social disconnection interventions. BMC Public Health 2024; 24:1250. [PMID: 38714949 PMCID: PMC11075311 DOI: 10.1186/s12889-024-18365-5] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Accepted: 03/15/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Being socially excluded has detrimental effects, with prolonged exclusion linked to loneliness and social isolation. Social disconnection interventions that do not require direct support actions (e.g., "how can I help?") offer promise in mitigating the affective and cognitive consequences of social exclusion. We examine how various social disconnection interventions involving friends and unknown peers might mitigate social exclusion by buffering (intervening before) and by promoting recovery (intervening after). METHODS We present an integrative data analysis (IDA) of five studies (N = 664) that systematically exposed participants to exclusion (vs. inclusion) social dynamics. Using a well-validated paradigm, participants had a virtual interaction with two other people. Unbeknownst to participants, the other people's behavior was programmed to either behave inclusively toward the participant or for one to behave exclusively. Critically, our social disconnection interventions experimentally manipulated whether a friend was present (vs. an unknown peer vs. being alone), the nature of interpersonal engagement (having a face-to-face conversation vs. a reminder of an upcoming interaction vs. mere presence), and the timing of the intervention in relation to the social dynamic (before vs. during vs. after). We then assessed participants' in-the-moment affective and cognitive responses, which included mood, feelings of belonging, sense of control, and social comfort. RESULTS Experiencing exclusion (vs. inclusion) led to negative affective and cognitive consequences. However, engaging in a face-to-face conversation with a friend before the exclusion lessened its impact (p < .001). Moreover, a face-to-face conversation with a friend after exclusion, and even a reminder of an upcoming interaction with a friend, sped-up recovery (ps < .001). There was less conclusive evidence that a face-to-face conversation with an unknown peer, or that the mere presence of a friend or unknown peer, conferred protective benefits. CONCLUSIONS The findings provide support for the effectiveness of social disconnection interventions that involve actual (i.e., face-to-face) or symbolic (i.e., reminders) interactions with friends. These interventions target momentary vulnerabilities that arise from social exclusion by addressing negative affect and cognitions before or after they emerge. As such, they offer a promising approach to primary prevention prior to the onset of loneliness and social isolation.
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Affiliation(s)
- Randy T Lee
- Department of Psychology, Cornell University, Ithaca, NY, USA.
| | - Gizem Surenkok
- Department of Psychology, Cornell University, Ithaca, NY, USA
| | - Vivian Zayas
- Department of Psychology, Cornell University, Ithaca, NY, USA
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2
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Song YW, Maekawa S, Sasaki K, Yoshida D, Nagai M, Ishikawa-Nagai S, Da Silva J, Kim DM, Chen CY. Microscopic in-situ analysis of the mucosal healing around implants treated by protease activated receptor 4-agonist peptide or perpendicularly protruded type I collagen in rats. J Biomed Mater Res B Appl Biomater 2024; 112:e35330. [PMID: 37737549 DOI: 10.1002/jbm.b.35330] [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: 01/08/2023] [Revised: 08/29/2023] [Accepted: 09/07/2023] [Indexed: 09/23/2023]
Abstract
Enhanced mucosal sealing around titanium implants can reduce complications such as peri-implantitis. The present study aims to investigate the mucosal healing at the early stage around the protease activated receptor 4-agonist peptide (PAR4-AP)- or perpendicularly protruded type I collagen (pCol)-treated titanium implants. A total of 72 implants were placed in 36 rats in the study. Following extractions, two tissue-level implants among the following three different surfaces, PAR4-AP-coated (PAR4 group, n = 24), pCol-treated (pCol group, n = 24) and non-treated (control group, n = 24) ones, were placed in the maxillae of each rat based on a split-mouth design. The specimens retrieved at 8 h (n = 8 per group), 3 days (n = 8 per group), and 2 weeks (n = 8 per group), were immunostained and tissue-cleared, and the signals of laminin-5 and collagen fibers were observed under multiphoton microscopy. Statistical analyses were performed using linear mixed model with post hoc tests to compare differences between the groups. While there was no intergroup difference at 8 h, the laminin-5 at 3 days was more abundant near the PAR4-group-surface, and its area was significantly larger in the PAR4 group (0.0204 ± 0.0194 mm2 ) than the control (0.0019 ± 0.0025 mm2 , p = .001) and pCol (0.0023 ± 0.0022 mm2 , p < .001) groups. The pCol group showed a significantly larger area of collagen fibers (0.0230 ± 0.0148 mm2 ) compared to the control (0.0035 ± 0.0051 mm2 , p = .002) and PAR4 (0.0031 ± 0.0057 mm2 , p < .001) groups at 3 days. At 3 days and 2 weeks, the collagen fiber orientation of the pCol group showed a more perpendicular manner compared to the control and PAR4 groups. The signal of basal lamina and collagen fibers were stronger around the PAR4-AP- and pCol-treated titanium surfaces, respectively during the early healing stage. This could have implications for improved mucosal sealing around dental implants, potentially reducing complications such as peri-implantitis.
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Affiliation(s)
- Young Woo Song
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
- Department of Periodontology, Gangnam Severance Hospital, Yonsei University College of Dentistry, Seoul, South Korea
- Department of Periodontology, Research Institute of Periodontal Regeneration, Yonsei University College of Dentistry, Seoul, South Korea
| | - Shogo Maekawa
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
- Department of Periodontology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Keito Sasaki
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
- Department of Prosthodontics and Oral Implantology, School of Dental Medicine, Iwate Medical University, Morioka, Japan
| | - Daichi Yoshida
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
- Department of Prosthodontics and Oral Implantology, School of Dental Medicine, Iwate Medical University, Morioka, Japan
| | - Masazumi Nagai
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Shigemi Ishikawa-Nagai
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - John Da Silva
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - David Minjoon Kim
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
| | - Chia-Yu Chen
- Department of Oral Medicine, Infection, and Immunity, Harvard School of Dental Medicine, Boston, Massachusetts, USA
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3
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Swathi K, Sumathi S, Somit K, Shubashini SK. Reverse pharmacology approach to validate the diabetic wound-healing activity of Jatyadi thailam formulations in vitro on diabetic mimic environment. Arch Physiol Biochem 2023:1-14. [PMID: 37897224 DOI: 10.1080/13813455.2023.2264536] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 09/22/2023] [Indexed: 10/29/2023]
Abstract
Objective: Jatyadi thailam, an Ayurvedic preparation, is renowned for its efficacy in diabetic wound healing and inflammation. This study aimed to validate and compare the diabetic wound-healing potential of two Jatyadi thailam formulations - Ayurvedic formulary of India Jatyadi thailam (JT-AFI) and Yogagrantha formulation of Jatyadi thailam (JT-YG), in a diabetic environment using L929 fibroblast cells in vitro. Methodology: The effects on cell survival, proliferation, migration, angiogenesis, cell cycle progression, apoptosis, ROS generation, and mitochondrial function were evaluated.Results: The formulations promoted cell proliferation, migration, angiogenesis, while also regulating cell cycle and apoptosis. They effectively suppressed ROS generation and modulated mitochondrial function. JT-AFI exhibited superior efficacy in accelerating diabetic wound healing compared to JT-YG.Conclusion: These findings provide substantial support for the mechanistic role of Jatyadi thailam in diabetic wound healing.
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Affiliation(s)
- Kandasamy Swathi
- Department of Biochemistry, Biotechnology and Bioinformatics, Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore, India
| | - Sundaravadivelu Sumathi
- Department of Biochemistry, Biotechnology and Bioinformatics, Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore, India
| | | | - Sripathi K Shubashini
- Department of Chemistry, Avinashilingam Institute for Home Science and Higher Education for Women, Coimbatore, India
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Stelling-Férez J, López-Miranda S, Gabaldón JA, Nicolás FJ. Oleanolic Acid Complexation with Cyclodextrins Improves Its Cell Bio-Availability and Biological Activities for Cell Migration. Int J Mol Sci 2023; 24:14860. [PMID: 37834307 PMCID: PMC10573973 DOI: 10.3390/ijms241914860] [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: 09/07/2023] [Revised: 09/26/2023] [Accepted: 09/29/2023] [Indexed: 10/15/2023] Open
Abstract
Wound healing is a complex process to restore skin. Plant-derived bioactive compounds might be a source of substances for the treatment of wounds stalled in a non-resolving stage of wound healing. Oleanolic acid (OA), a pentacyclic triterpene, has shown favorable wound healing properties both in vitro and in vivo. Unfortunately, OA cannot be solubilized in aqueous media, and it needs to be helped by the use of dimethyl sulfoxide (DMSO). In this paper, we have shown that cyclodextrins (CDs) are a good alternative to DMSO as agents to deliver OA to cells, providing better features than DMSO. Cyclodextrins are natural macromolecules that show a unique tridimensional structure that can encapsulate a wide variety of hydrophobic compounds. We have studied the cyclodextrin-encapsulated form of OA with OA/DMSO, comparing their stability, biological properties for cell migration, and cell viability. In addition, detailed parameters related to cell migration and cytoskeletal reorganization have been measured and compared. Our results show that OA-encapsulateds compound exhibit several advantages when compared to non-encapsulated OA in terms of chemical stability, migration enhancement, and preservation of cell viability.
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Affiliation(s)
- Javier Stelling-Férez
- Department of Nutrition and Food Technology, Health Sciences PhD Program, Universidad Católica de San Antonio Murcia (UCAM), Campus de los Jerónimos n°135, Guadalupe, 30107 Murcia, Spain; (J.S.-F.); (S.L.-M.); (J.A.G.)
- Regeneration, Molecular Oncology and TGF-β, Instituto Murciano de Investigación Biosanitaria (IMIB)-Arrixaca, Hospital Clínico Universitario Virgen de la Arrixaca, El Palmar, 30120 Murcia, Spain
| | - Santiago López-Miranda
- Department of Nutrition and Food Technology, Health Sciences PhD Program, Universidad Católica de San Antonio Murcia (UCAM), Campus de los Jerónimos n°135, Guadalupe, 30107 Murcia, Spain; (J.S.-F.); (S.L.-M.); (J.A.G.)
| | - José Antonio Gabaldón
- Department of Nutrition and Food Technology, Health Sciences PhD Program, Universidad Católica de San Antonio Murcia (UCAM), Campus de los Jerónimos n°135, Guadalupe, 30107 Murcia, Spain; (J.S.-F.); (S.L.-M.); (J.A.G.)
| | - Francisco José Nicolás
- Regeneration, Molecular Oncology and TGF-β, Instituto Murciano de Investigación Biosanitaria (IMIB)-Arrixaca, Hospital Clínico Universitario Virgen de la Arrixaca, El Palmar, 30120 Murcia, Spain
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5
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SARIAN MN, ZULKEFLI N, CHE ZAIN MS, MANIAM S, FAKURAZI S. A review with updated perspectives on in vitro and in vivo wound healing models. Turk J Biol 2023; 47:236-246. [PMID: 38152620 PMCID: PMC10751087 DOI: 10.55730/1300-0152.2659] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 08/31/2023] [Accepted: 08/10/2023] [Indexed: 12/29/2023] Open
Abstract
A skin wound or perforation triggers a series of homeostatic reactions to safeguard internal organs from invasion by pathogens or other substances that could damage body tissues. An injury may occasionally heal quickly, leading to the closure of the skin's structure. Healing from chronic wounds takes a long time. Although many treatment options are available to manage wound healing, an unmet therapy need remains because of the complexity of the processes and the other factors involved. It is crucial to conduct consistent research on novel therapeutic approaches to find an effective healing agent. Therefore, this work aims to cover various in vitro and in vivo methodologies that could be utilised to examine wound recovery. Before deciding on the optimal course of action, several techniques' benefits, drawbacks, and factors need to be reviewed.
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Affiliation(s)
- Murni Nazira SARIAN
- Institute of Systems Biology (INBIOSIS), Universiti Kebangsaan Malaysia (National University of Malaysia), 43600, Bandar Baru Bangi, Selangor,
Malaysia
| | - Nabilah ZULKEFLI
- Institute of Systems Biology (INBIOSIS), Universiti Kebangsaan Malaysia (National University of Malaysia), 43600, Bandar Baru Bangi, Selangor,
Malaysia
| | - Mohamad Shazeli CHE ZAIN
- Bioresource Technology Division, School of Industrial Technology, Universiti Sains Malaysia (Science University of Malaysia), 11800, Pulau Pinang,
Malaysia
| | - Sandra MANIAM
- Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (University of Putra Malaysia), Serdang 43400, Selangor,
Malaysia
| | - Sharida FAKURAZI
- Faculty of Medicine and Health Sciences, Universiti Putra Malaysia (University of Putra Malaysia), Serdang 43400, Selangor,
Malaysia
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Chelmuș-Burlacu A, Tang E, Pieptu D. Phenotypic Modulation of Adipose-Derived Stem Cells and Fibroblasts Treated with Povidone-Iodine and Chlorhexidine in Mono and Coculture Models. Biomedicines 2023; 11:1855. [PMID: 37509495 PMCID: PMC10377167 DOI: 10.3390/biomedicines11071855] [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: 04/14/2023] [Revised: 06/10/2023] [Accepted: 06/27/2023] [Indexed: 07/30/2023] Open
Abstract
Topical antiseptics are essential in wound treatment, and adipose-derived stem cells (ADSCs) have recently been proven to facilitate healing. However, the impact of antiseptics on ADSCs has not been fully elucidated, especially in relation to other relevant cell types present in the wound microenvironment, e.g., fibroblasts. This study evaluated the effects of chlorhexidine and povidone-iodine on four cellular constructs in 2D and 3D in vitro culture systems. Cell constructs were treated with two concentrations of each antiseptic, after which cell migration activity, α-SMA, and Ki67 marker expressions were assessed and compared. Both tested concentrations of povidone-iodine impaired migration and sprouting compared to chlorhexidine, which had minimal effects when used in low concentrations. The gap in the wound healing assay did not close after 24 h of povidone-iodine treatment, although, at the lower concentration, cells started to migrate in a single-cell movement pattern. Similarly, in 3D culture systems, sprouting with reduced spike formation was observed at high povidone-iodine concentrations. Both antiseptics modulated α-SMA and Ki67 marker expressions at 5 days following treatment. Although both antiseptics had cytotoxic effects dependent on drug concentration and cell type, povidone-iodine contributed more substantially to the healing process than chlorhexidine, acting especially on fibroblasts.
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Affiliation(s)
- Alina Chelmuș-Burlacu
- Plastic Surgery Department, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania
| | - Eric Tang
- Phoenix Biomedical Ltd., Macclesfield SK10 3HZ, UK
| | - Dragoș Pieptu
- Plastic Surgery Department, "Grigore T. Popa" University of Medicine and Pharmacy, 700115 Iași, Romania
- Plastic Surgery Department, Regional Oncology Institute, 700483 Iași, Romania
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7
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Abstract
In this paper, we review and analyze the commonly available wound healing models reported in the literature and discuss their advantages and issues, considering their relevance and translational potential to humans. Our analysis includes different in vitro and in silico as well as in vivo models and experimental techniques. We further explore the new technologies in the study of wound healing to provide an all encompassing review of the most efficient ways to proceed with wound healing experiments. We revealed that there is not one model of wound healing that is superior and can give translatable results to human research. Rather, there are many different models that have specific uses for studying certain processes or stages of wound healing. Our analysis suggests that when performing an experiment to assess stages of wound healing or different therapies to enhance healing, one must consider not only the species that will be used but also the type of model and how this can best replicate the physiology or pathophysiology in humans.
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Affiliation(s)
- Kiley Flynn
- Department
of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824-1312, United States
| | - Nouf N. Mahmoud
- Faculty
of Pharmacy, Al-Zaytoonah University of
Jordan, Amman 11733, Jordan
- Department
of Biomedical Sciences, College of Health Sciences, QU Health, Qatar University, Doha 2713, Qatar
| | - Shahriar Sharifi
- Department
of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824-1312, United States
| | - Lisa J. Gould
- Department
of Surgery, South Shore Hospital, South Weymouth, Massachusetts 02190, United States
| | - Morteza Mahmoudi
- Department
of Radiology and Precision Health Program, Michigan State University, East Lansing, Michigan 48824-1312, United States
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8
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Chen H, Qiu X, Xia T, Li Q, Wen Z, Huang B, Li Y. Mesoporous Materials Make Hydrogels More Powerful in Biomedicine. Gels 2023; 9:gels9030207. [PMID: 36975656 PMCID: PMC10048667 DOI: 10.3390/gels9030207] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/03/2023] [Accepted: 03/05/2023] [Indexed: 03/12/2023] Open
Abstract
Scientists have been attempting to improve the properties of mesoporous materials and expand their application since the 1990s, and the combination with hydrogels, macromolecular biological materials, is one of the research focuses currently. Uniform mesoporous structure, high specific surface area, good biocompatibility, and biodegradability make the combined use of mesoporous materials more suitable for the sustained release of loaded drugs than single hydrogels. As a joint result, they can achieve tumor targeting, tumor environment stimulation responsiveness, and multiple therapeutic platforms such as photothermal therapy and photodynamic therapy. Due to the photothermal conversion ability, mesoporous materials can significantly improve the antibacterial ability of hydrogels and offer a novel photocatalytic antibacterial mode. In bone repair systems, mesoporous materials remarkably strengthen the mineralization and mechanical properties of hydrogels, aside from being used as drug carriers to load and release various bioactivators to promote osteogenesis. In hemostasis, mesoporous materials greatly elevate the water absorption rate of hydrogels, enhance the mechanical strength of the blood clot, and dramatically shorten the bleeding time. As for wound healing and tissue regeneration, incorporating mesoporous materials can be promising for enhancing vessel formation and cell proliferation of hydrogels. In this paper, we introduce the classification and preparation methods of mesoporous material-loaded composite hydrogels and highlight the applications of composite hydrogels in drug delivery, tumor therapy, antibacterial treatment, osteogenesis, hemostasis, and wound healing. We also summarize the latest research progress and point out future research directions. After searching, no research reporting these contents was found.
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Affiliation(s)
- Huangqin Chen
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Xin Qiu
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Tian Xia
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Qing Li
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Zhehan Wen
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
| | - Bin Huang
- Department of Stomatology, School of Stomatology and Ophthalmology, Xianning Medical College, Hubei University of Science and Technology, Xianning 437100, China
- Correspondence: (B.H.); (Y.L.)
| | - Yuesheng Li
- Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Non-Power Nuclear Technology Collaborative Innovation Center, Hubei University of Science and Technology, Xianning 437100, China
- Correspondence: (B.H.); (Y.L.)
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Griebel M, Vasan A, Chen C, Eyckmans J. Fibroblast clearance of damaged tissue following laser ablation in engineered microtissues. APL Bioeng 2023; 7:016112. [PMID: 36938481 PMCID: PMC10017124 DOI: 10.1063/5.0133478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Accepted: 02/06/2023] [Indexed: 03/15/2023] Open
Abstract
Although the mechanisms underlying wound healing are largely preserved across wound types, the method of injury can affect the healing process. For example, burn wounds are more likely to undergo hypertrophic scarring than are lacerations, perhaps due to the increased underlying damage that needs to be cleared. This tissue clearance is thought to be mainly managed by immune cells, but it is unclear if fibroblasts contribute to this process. Herein, we utilize a 3D in vitro model of stromal wound healing to investigate the differences between two modes of injury: laceration and laser ablation. We demonstrate that laser ablation creates a ring of damaged tissue around the wound that is cleared by fibroblasts prior to wound closure. This process is dependent on ROCK and dynamin activity, suggesting a phagocytic or endocytic process. Transmission electron microscopy of fibroblasts that have entered the wound area reveals large intracellular vacuoles containing fibrillar extracellular matrix. These results demonstrate a new model to study matrix clearance by fibroblasts in a 3D soft tissue. Because aberrant wound healing is thought to be caused by an imbalance between matrix degradation and production, this model, which captures both aspects, will be a valuable addition to the study of wound healing.
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Affiliation(s)
- Megan Griebel
- Department of Biomedical Engineering and the Biological Design Center, Boston University, Boston, Massachusetts 02215, USA
| | - Anish Vasan
- Department of Biomedical Engineering and the Biological Design Center, Boston University, Boston, Massachusetts 02215, USA
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Ishfaq B, Khan IU, Khalid SH, Asghar S. Design and evaluation of sodium alginate-based hydrogel dressings containing Betula utilis extract for cutaneous wound healing. Front Bioeng Biotechnol 2023; 11:1042077. [PMID: 36777244 PMCID: PMC9909831 DOI: 10.3389/fbioe.2023.1042077] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 09/26/2022] [Accepted: 01/10/2023] [Indexed: 01/28/2023] Open
Abstract
Traditional wound dressings have a limited capacity to absorb exudates, are permeable to microbes, and may adhere to wounds, which leads to secondary injuries. Hydrogels are promising alternative dressings to overcome the above challenges. In this study, we developed sodium alginate-based hydrogel films loaded with Betula utilis bark extract. These films were prepared via solvent-casting crosslinking method and evaluated for wound healing activity. Prepared films were 0.05-0.083 mm thick, flexible with folding endurance ranging from 197-203 folds, which indicates good physical properties. Optimized formulations exhibited successful loading of extract in the film matrix without any interaction as confirmed by FTIR. Maximum zone of inhibition against Gram-positive and Gram-negative bacteria was achieved by optimum formulation (B6), i.e., 19 mm and 9 mm, respectively, with > 90% scavenging activity. Furthermore, this optimum formulation (B6) was able to achieve 93% wound contraction in rats. Histograms of the optimized formulation treated group also revealed complete reepithelization of wounds. Conclusively, our extract-loaded hydrogel dressing successfully demonstrated its potential for cutaneous wound healing.
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11
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Butler K, Brinker CJ, Leong HS. Bridging the In Vitro to In Vivo gap: Using the Chick Embryo Model to Accelerate Nanoparticle Validation and Qualification for In Vivo studies. ACS Nano 2022; 16:19626-19650. [PMID: 36453753 PMCID: PMC9799072 DOI: 10.1021/acsnano.2c03990] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 10/17/2022] [Indexed: 06/17/2023]
Abstract
We postulate that nanoparticles (NPs) for use in therapeutic applications have largely not realized their clinical potential due to an overall inability to use in vitro results to predict NP performance in vivo. The avian embryo and associated chorioallantoic membrane (CAM) has emerged as an in vivo preclinical model that bridges the gap between in vitro and in vivo, enabling rapid screening of NP behavior under physiologically relevant conditions and providing a rapid, accessible, economical, and more ethical means of qualifying nanoparticles for in vivo use. The CAM is highly vascularized and mimics the diverging/converging vasculature of the liver, spleen, and lungs that serve as nanoparticle traps. Intravital imaging of fluorescently labeled NPs injected into the CAM vasculature enables immediate assessment and quantification of nano-bio interactions at the individual NP scale in any tissue of interest that is perfused with a microvasculature. In this review, we highlight how utilization of the avian embryo and its CAM as a preclinical model can be used to understand NP stability in blood and tissues, extravasation, biocompatibility, and NP distribution over time, thereby serving to identify a subset of NPs with the requisite stability and performance to introduce into rodent models and enabling the development of structure-property relationships and NP optimization without the sacrifice of large populations of mice or other rodents. We then review how the chicken embryo and CAM model systems have been used to accelerate the development of NP delivery and imaging agents by allowing direct visualization of targeted (active) and nontargeted (passive) NP binding, internalization, and cargo delivery to individual cells (of relevance for the treatment of leukemia and metastatic cancer) and cellular ensembles (e.g., cancer xenografts of interest for treatment or imaging of cancer tumors). We conclude by showcasing emerging techniques for the utilization of the CAM in future nano-bio studies.
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Affiliation(s)
- Kimberly
S. Butler
- Molecular
and Microbiology, Sandia National Laboratories, Albuquerque, New Mexico 87123, United States
| | - C. Jeffrey Brinker
- Department
of Chemical and Biological Engineering and the Comprehensive Cancer
Center, The University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Hon Sing Leong
- Department
of Medical Biophysics, Faculty of Medicine, University of Toronto, Toronto M5G 1L7, Canada
- Biological
Sciences Platform, Sunnybrook Hospital, Toronto M4N 3M5, Canada
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Gupta S, Patel L, Mitra K, Bit A. Fibroblast Derived Skin Wound Healing Modeling on Chip under the Influence of Micro-Capillary Shear Stress. Micromachines 2022; 13:305. [PMID: 35208429 PMCID: PMC8876720 DOI: 10.3390/mi13020305] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/27/2022] [Accepted: 02/10/2022] [Indexed: 12/14/2022]
Abstract
Fibroblast cell migration plays a crucial role in the wound-healing process. Hence, its quantitative investigation is important to understand the mechanism of the wound-healing process. The dynamic nature of the wound-healing process can be easily implemented using a microfluidic-based wound-healing assay. This work presented the use of a microfluidics device to simulate traumatic wounds on fibroblast cell monolayers by utilizing trypsin flow and PDMS barrier. In this study, a microfluidic chip with a transparent silk film is reported. The placement of film provides 3D cell culture conditions that mimic a 3D extracellular matrix (ECM) like environment and allows real-time monitoring of cells. A numerical study was conducted to evaluate the influence of dynamic medium-induced shear stress on the base and wall of the microchannel. This could facilitate the optimization of the inlet flow conditions of the media in the channel. At the same time, it could help in identifying stress spots in the channel. The scaffolds were placed in those spots for evaluating the influence of shear forces on the migratory behavior of fibroblast cells. The in vitro microfluidic assembly was then evaluated for cell migration under the influence of external shear forces during the wound-healing phenomena. A faster wound healing was obtained at the end of 24 h of the creation of the wound in the presence of optimal shear stress. On increasing the shear stress beyond a threshold limit, it dissociates fibroblast cells from the surface of the substrate, thereby decelerating the wound-healing process. The above phenomena were transformed in both coplanar microfluidics surfaces (by realizing in the multichannel interlinked model) and transitional microfluidics channels (by realizing in the sandwich model).
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Eckrich J, Hoormann N, Kersten E, Piradashvili K, Wurm FR, Heller M, Becker S, Anusic T, Brieger J, Strieth S. Surface Modification of Porous Polyethylene Implants with an Albumin-Based Nanocarrier-Release System. Biomedicines 2021; 9:1485. [PMID: 34680602 PMCID: PMC8533240 DOI: 10.3390/biomedicines9101485] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/27/2021] [Accepted: 10/11/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Porous polyethylene (PPE) implants are used for the reconstruction of tissue defects but have a risk of rejection in case of insufficient ingrowth into the host tissue. Various growth factors can promote implant ingrowth, yet a long-term gradient is a prerequisite for the mediation of these effects. As modification of the implant surface with nanocarriers may facilitate a long-term gradient by sustained factor release, implants modified with crosslinked albumin nanocarriers were evaluated in vivo. METHODS Nanocarriers from murine serum albumin (MSA) were prepared by an inverse miniemulsion technique encapsulating either a low- or high-molar mass fluorescent cargo. PPE implants were subsequently coated with these nanocarriers. In control cohorts, the implant was coated with the homologue non-encapsulated cargo substance by dip coating. Implants were consequently analyzed in vivo using repetitive fluorescence microscopy utilizing the dorsal skinfold chamber in mice for ten days post implantation. RESULTS Implant-modification with MSA nanocarriers significantly prolonged the presence of the encapsulated small molecules while macromolecules were detectable during the investigated timeframe regardless of the form of application. CONCLUSIONS Surface modification of PPE implants with MSA nanocarriers results in the alternation of release kinetics especially when small molecular substances are used and therefore allows a prolonged factor release for the promotion of implant integration.
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Affiliation(s)
- Jonas Eckrich
- Department of Otorhinolaryngology, University Medical Center Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany; (N.H.); (M.H.); (J.B.); (S.S.)
- Department of Otorhinolaryngology, University Medical Center Bonn (UKB), Venusberg-Campus 1, 53127 Bonn, Germany
| | - Niklas Hoormann
- Department of Otorhinolaryngology, University Medical Center Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany; (N.H.); (M.H.); (J.B.); (S.S.)
| | - Erik Kersten
- Max Planck Institute for Polymer Research (MPIP), Ackermannweg 10, 55128 Mainz, Germany; (E.K.); (K.P.); (F.R.W.)
| | - Keti Piradashvili
- Max Planck Institute for Polymer Research (MPIP), Ackermannweg 10, 55128 Mainz, Germany; (E.K.); (K.P.); (F.R.W.)
| | - Frederik R. Wurm
- Max Planck Institute for Polymer Research (MPIP), Ackermannweg 10, 55128 Mainz, Germany; (E.K.); (K.P.); (F.R.W.)
- Sustainable Polymer Chemistry, Department of Molecules and Materials, MESA+ Institute for Nanotechnology, Faculty of Science and Technology, Universiteit Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands
| | - Martin Heller
- Department of Otorhinolaryngology, University Medical Center Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany; (N.H.); (M.H.); (J.B.); (S.S.)
| | - Sven Becker
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Tübingen, Elfriede-Aulhorn-Str. 5, 72076 Tübingen, Germany;
| | - Toni Anusic
- Institute of Medical Biostatistics, Epidemiology and Informatics (IMBEI), University Medical Center, Obere Zahlbacher Str. 69, 55131 Mainz, Germany;
| | - Juergen Brieger
- Department of Otorhinolaryngology, University Medical Center Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany; (N.H.); (M.H.); (J.B.); (S.S.)
| | - Sebastian Strieth
- Department of Otorhinolaryngology, University Medical Center Mainz, Langenbeckstrasse 1, 55131 Mainz, Germany; (N.H.); (M.H.); (J.B.); (S.S.)
- Department of Otorhinolaryngology, University Medical Center Bonn (UKB), Venusberg-Campus 1, 53127 Bonn, Germany
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