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Zhu Z, Sun S, Jiang T, Zhang L, Chen M, Chen S. A double-edged sword of platelet-derived extracellular vesicles in tissues, injury or repair: The current research overview. Tissue Cell 2023; 82:102066. [PMID: 36924675 DOI: 10.1016/j.tice.2023.102066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 02/23/2023] [Accepted: 03/09/2023] [Indexed: 03/14/2023]
Abstract
Extracellular vesicles (EVs) are vesicular bodies with a double-layered membrane structure that are detached from the cell membrane or secreted by the cells. EVs secreted by platelets account for the main part in the blood circulation, which account for about 30% or even more. Many types of cells are regulated by PEVs, including endothelial cells, leukocytes, smooth muscle cells, etc. Nevertheless, despite the growing interest in the study of extracellular vesicles, there are still only a few studies on the role of PEVs. Therefore, this overview mainly focuses on one method of isolation and the functions of PEVs in tissues found so far, including promoting tissue repair and mediating tissue damage, which can be used for researchers to continue to explore the role of PEVs in other fields.
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Affiliation(s)
- Zepeng Zhu
- Department of Urology, Zhongda Hospital, Southeast University, Nanjing, China; Medical School, Southeast University, Nanjing, China
| | - Si Sun
- Department of Urology, Zhongda Hospital, Southeast University, Nanjing, China; Medical School, Southeast University, Nanjing, China
| | - Tiancheng Jiang
- Department of Urology, Zhongda Hospital, Southeast University, Nanjing, China; Medical School, Southeast University, Nanjing, China
| | - Lei Zhang
- Department of Urology, Zhongda Hospital, Southeast University, Nanjing, China; Surgical Research Center, Institute of Urology, Southeast University Medical School, Nanjing, China.
| | - Ming Chen
- Department of Urology, Zhongda Hospital, Southeast University, Nanjing, China; Surgical Research Center, Institute of Urology, Southeast University Medical School, Nanjing, China.
| | - Shuqiu Chen
- Department of Urology, Zhongda Hospital, Southeast University, Nanjing, China; Surgical Research Center, Institute of Urology, Southeast University Medical School, Nanjing, China.
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2
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Dillmann JB, Lopes TRR, da Rosa G, Fracasso M, Tapia Barraza VC, Barbosa NV, de Andrade CM, Kommers GD, Cargnelutti JF, Monteiro SG. Safety and efficacy of Lucilia cuprina maggots on treating an induced infected wound in Wistar rats. Exp Parasitol 2022; 240:108337. [PMID: 35850276 DOI: 10.1016/j.exppara.2022.108337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/05/2022] [Accepted: 07/12/2022] [Indexed: 11/04/2022]
Abstract
Infection is one of the main complications that hinder wound healing. Currently, antibiotic-resistant bacteria, such as Methicilin-resistant Staphylococcus aureus (MRSA), are a concern worldwide for both humans and animals. Maggot therapy is re-emerging as an alternative to intractable wounds and may be an option to the traditional antibiotic treatment. Although the species of choice is Lucilia sericata, reports of clinical use have led us to evaluate the efficacy and safety of using Lucilia cuprina larvae on induced infected wounds in Wistar rats. In short, 32 male Wistar rats were divided into 4 groups: Group I - saline solution treated; Group II - antibiotic-treated; Group III - treated with larval debridement, and Group IV - without wound and treatment. Skin wounds were induced in groups I, II and III. All treatments were performed once and held for 48 h. Clinical, microbiological, histopathological, hematological, and biochemical analyses were done. Significant wound area contraction was found (>95%) in group III on day 9 compared to day 15 in group II. Complete elimination (0.0 ± 0.0 CFU/mL) of bioburden was achieved after the second treatment (day 6) in both the II and III groups, compared to an increase in Group I (6.51 ± 0.37 CFU/mL). A cleaner wound was also observed in the histopathological evaluation of group III, with adequate collagen formation and re-epithelialization on day 15. Furthermore, larvae increased blood platelet levels after the first treatment. L. cuprina larvae have proven safe and effective in accelerating wound treatment and eliminating MRSA.
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Affiliation(s)
- Janaína Brand Dillmann
- Programa de Pós-graduação em Medicina Veterinária, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil; Departamento de Microbiologia e Parasitologia, Universidade Federal de Santa Maria, RS, Brazil.
| | - Thaísa Regina Rocha Lopes
- Programa de Pós-graduação em Medicina Veterinária, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil; Setor de Virologia, Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Santa Maria, RS, Brazil
| | - Gilneia da Rosa
- Departamento de Microbiologia e Parasitologia, Universidade Federal de Santa Maria, RS, Brazil
| | - Mateus Fracasso
- Departamento de Microbiologia e Parasitologia, Universidade Federal de Santa Maria, RS, Brazil
| | | | - Nathália Viana Barbosa
- Laboratório de Análises Clínicas Veterinárias, Departamento de Clínica de Pequenos Animais, Universidade Federal de Santa Maria, RS, Brazil
| | - Cinthia Melazzo de Andrade
- Laboratório de Análises Clínicas Veterinárias, Departamento de Clínica de Pequenos Animais, Universidade Federal de Santa Maria, RS, Brazil
| | | | - Juliana Felipetto Cargnelutti
- Laboratório de Bacteriologia, Departamento de Medicina Veterinária Preventiva do Centro de Ciências Rurais, Universidade Federal de Santa Maria, RS, Brazil
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Zhao N, Tian Z, Li Y, Yu H, Yang Y. Virtual Reality-Based Analysis of Pressure Ulcer Care Information Related to Medical Equipment for the Prevention of Pressure Ulcer Skin Foam Dressings in the Elderly. JOURNAL OF HEALTHCARE ENGINEERING 2021; 2021:6389001. [PMID: 34795884 PMCID: PMC8594979 DOI: 10.1155/2021/6389001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Accepted: 09/25/2021] [Indexed: 11/22/2022]
Abstract
As the standard of life has increased with the advancement of the time, there has been an increasing stress on healthcare with the aging diet, and pressure sores occur in elderly hospitalized subjects. Of course, the emergence of related medical devices, especially auxiliary foam dressings, is constantly improving. Pressure ulcers are extremely harmful to the elderly. The use of virtual reality technology to simulate the treatment of foam excipients is to test the role of medical devices in virtual reality. In particular, the use of foam dressings in the management of pressure deposits is the most relevant study for this paper, which reviews the relevant literature and conducts a thematic study on patients in a specific urban hospital. The relevant materials were designed, the experiments were designed, and the relevant research data were obtained. Studies show that virtual reality-based preventive medical devices can improve the efficiency of pressure ulcer treatment in hospitals by about 12%. Pressure ulcers have different incidences among people of different ages. The probability is much higher than that of adolescents. Foam dressing is very effective in preventing pressure ulcers. The probability of pressure ulcers after using foam dressing is about 35% lower than that when it is not used.
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Affiliation(s)
- Na Zhao
- Outpatient Dressing Room, Beijing Huairou Hospital, Huairou 101400, Beijing, China
| | - Zhanhong Tian
- Department of Respiration, Beijing Huairou Hospital, Huairou 101400, Beijing, China
| | - Yang Li
- Department of General Surgery, Beijing Chaoyang Hospital, Chaoyang 100015, Beijing, China
| | - Haihua Yu
- Department of Obstetrics and Gynecology, Beijing Huairou Hospital, Huairou 101400, Beijing, China
| | - Yu Yang
- Department of Endocrine, Beijing Huairou Hospital, Huairou 101400, Beijing, China
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4
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The Role of MSC in Wound Healing, Scarring and Regeneration. Cells 2021; 10:cells10071729. [PMID: 34359898 PMCID: PMC8305394 DOI: 10.3390/cells10071729] [Citation(s) in RCA: 149] [Impact Index Per Article: 49.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/02/2021] [Accepted: 07/03/2021] [Indexed: 02/06/2023] Open
Abstract
Tissue repair and regeneration after damage is not completely understood, and current therapies to support this process are limited. The wound healing process is associated with cell migration and proliferation, extracellular matrix remodeling, angiogenesis and re-epithelialization. In normal conditions, a wound will lead to healing, resulting in reparation of the tissue. Several risk factors, chronic inflammation, and some diseases lead to a deficient wound closure, producing a scar that can finish with a pathological fibrosis. Mesenchymal stem/stromal cells (MSCs) are widely used for their regenerative capacity and their possible therapeutically potential. Derived products of MSCs, such as exosomes or extravesicles, have shown a therapeutic potential similar to MSCs, and these cell-free products may be interesting in clinics. MSCs or their derivative products have shown paracrine beneficial effects, regulating inflammation, modifying the fibroblast activation and production of collagen and promoting neovascularization and re-epithelialization. This review describes the effects of MSCs and their derived products in each step of the wound repair process. As well, it reviews the pre-clinical and clinical use of MSCs to benefit in skin wound healing in diabetic associated wounds and in pathophysiological fibrosis.
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Malekpour Alamdari N, Shafiee A, Mirmohseni A, Besharat S. Evaluation of the efficacy of platelet-rich plasma on healing of clean diabetic foot ulcers: A randomized clinical trial in Tehran, Iran. Diabetes Metab Syndr 2021; 15:621-626. [PMID: 33740736 DOI: 10.1016/j.dsx.2021.03.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Revised: 03/02/2021] [Accepted: 03/04/2021] [Indexed: 11/24/2022]
Abstract
BACKGROUND AND AIMS Diabetic foot ulcers (DFUs) are among challenging hurdles both for the patient and the physician. There is a recent trend toward finding novel and clinically efficient modalities to treat this potentially hazardous complication of diabetes mellitus in a timely manner. Herein, we aim to appraise the efficacy of platelet-rich plasma (PRP) in healing of clean DFUs. METHODS 90 patients with clean DFUs consisting of 56 (62.2%) males and 34 (37.8%) females with mean age (±standard deviation) of 56.52 (±7.14) years were enrolled in this study between June 2017 and December 2018. They were randomly allocated into control group (47 patients who received conventional dressing along with silver sulfadiazine ointment twice daily), and case group (43 patients who received PRP gel twice weekly for 3 weeks). All the patients were followed up for 6 months. RESULTS Our study showed that PRP significantly increased the healing rate of DFUs regardless of the age (p-value: 0.0), gender (p-value: 0.0), or smoking (p-value: 0.0) and blood pressure (p-value: 0.0) status of patients, but it did not have a significant impact on the need for amputation (p-value: 0.11), level of amputation (p-value: 0.16), or the need for further treatments such as graft or angioplasty (p-value: 0.52). CONCLUSION Regardless of the age, gender, or smoking and blood pressure status of patients, PRP can be efficiently used in diabetic patients to accelerate the healing rate of foot ulcers.
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Affiliation(s)
- Nasser Malekpour Alamdari
- Critical Care Quality Improvement Research Center at Shahid Modarres Hospital, Department of General Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Clinical Research and Development Center at Shahid Modarres Hospital, Department of General Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Shafiee
- Clinical Research and Development Center at Shahid Modarres Hospital, Department of General Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Atefeh Mirmohseni
- Clinical Research and Development Center at Shahid Modarres Hospital, Department of General Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sara Besharat
- Clinical Research and Development Center at Shahid Modarres Hospital, Department of Radiology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Xu M, Su X, Xiao X, Yu H, Li X, Keating A, Wang S, Zhao RC. Hydrogen Peroxide-Induced Senescence Reduces the Wound Healing-Promoting Effects of Mesenchymal Stem Cell-Derived Exosomes Partially via miR-146a. Aging Dis 2021; 12:102-115. [PMID: 33532131 PMCID: PMC7801275 DOI: 10.14336/ad.2020.0624] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 06/24/2020] [Indexed: 12/20/2022] Open
Abstract
Mesenchymal stem cells (MSCs) have beneficial effects on wound healing. MSCs function through direct cell-cell communication or indirectly through paracrine secretion of exosomes. Here, we found that MSC-derived exosomes had pro-wound healing effects via promotion of angiogenesis; however, this promoting effect was significantly reduced when senescence was induced in parental MSCs by hydrogen peroxide (H2O2). Further experiments showed that decreased miR-146a expression in exosomes derived from senescent MSCs (s-exo) contributed to these findings. In vitro, the pro-angiogenic effect of s-exo on tube formation in human umbilical vein endothelial cells was significantly reduced compared with that of exosomes derived from control MSCs (c-exo). In vivo, higher tube numbers and longer tube lengths were observed in the c-exo group compared with the s-exo group. Using microarray analysis, we found that miR-146a level in s-exo was lower than that in c-exo. Knockdown of miR-146a in c-exo decreased its capacity to promote angiogenesis, and overexpression of miR-146a in s-exo partially rescued its impaired pro-angiogenic capacity, thereby confirming that downregulation of miR-146a contributed to the reduced pro-wound healing capacity of s-exo. Our study is the first to demonstrate that cell senescence induced by H2O2 alters the pro-angiogenic ability of exosomes by modulating the expression of exosomal miRNAs, especially miR-146a, thus providing new insights into the correlation between parental cell state and exosome content and function.
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Affiliation(s)
- Meiqian Xu
- 1Institute of Basic Medical Sciences Chinese Academy of Medical Sciences,School of Basic Medicine Peking Union Medical College, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Xiaodong Su
- 2Brain Tumor Research Center, Beijing Neurosurgical Institute, Beijing Tiantan Hospital Affiliated to Capital Medical University, Beijing Laboratory of Biomedical Materials, Beijing 100070, China
| | - Xian Xiao
- 1Institute of Basic Medical Sciences Chinese Academy of Medical Sciences,School of Basic Medicine Peking Union Medical College, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Hongliang Yu
- 1Institute of Basic Medical Sciences Chinese Academy of Medical Sciences,School of Basic Medicine Peking Union Medical College, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Xiaoxia Li
- 3Department of Genetics and Cell Biology, Basic Medical College, Qingdao University, Qingdao 266071, China
| | - Armand Keating
- 4Cell Therapy Translational Research Laboratory, Princess Margaret, Cancer Centre, Toronto, Ontario M5G 2M9, Canada.,5Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5G2M9, Canada.,6Institute of Medical Science, University of Toronto, Toronto, Ontario M5G 2M9, Canada
| | - Shihua Wang
- 1Institute of Basic Medical Sciences Chinese Academy of Medical Sciences,School of Basic Medicine Peking Union Medical College, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing 100005, China
| | - Robert Chunhua Zhao
- 1Institute of Basic Medical Sciences Chinese Academy of Medical Sciences,School of Basic Medicine Peking Union Medical College, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing 100005, China
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GelMA combined with sustained release of HUVECs derived exosomes for promoting cutaneous wound healing and facilitating skin regeneration. J Mol Histol 2020; 51:251-263. [PMID: 32388839 DOI: 10.1007/s10735-020-09877-6] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 05/04/2020] [Indexed: 12/24/2022]
Abstract
It remains a clinical challenge for cutaneous wound healing and skin regeneration. Endothelial cells participate in the formation of blood vessels and play an important role in the whole process of wound healing. Recent studies suggested that exosomes contribute to the intercellular communication through paracrine pathways, and sustained release of exosomes from hydrogel-based materials provide a promising strategy for curing wound defects. In this study, we isolated exosomes derived from human umbilical vein endothelial cells (HUVECs) and found that HUVECs derived exosomes (HUVECs-Exos) could promote the proliferation and migration activities of keratinocytes and fibroblasts, which are two important effector cells for skin regeneration. Then we developed gelatin methacryloyl (GelMA) hydrogel as the wound dressing to incorporate HUVECs-Exos and applied it to the full-thickness cutaneous wounds. It demonstrated that GelMA scaffold could not only repair the wound defect, but also achieve sustained release of exosomes. The in vivo results showed accelerated re-epithelialization, promotion of collagen maturity and improvement of angiogenesis. Collectively, our findings suggested that HUVECs-Exos could accelerate wound healing and GelMA mediated controlled release of HUVECs-Exos might offer a new method for repairing cutaneous wound defects.
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8
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Masiero FS, Silva DG, Luchese M, Estércio T, Pérsio NV, Thyssen PJ. In vitro evaluation of the association of medicinal larvae (Insecta, Diptera, Calliphoridae) and topical agents conventionally used for the treatment of wounds. Acta Trop 2019; 190:68-72. [PMID: 30385217 DOI: 10.1016/j.actatropica.2018.10.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 10/26/2018] [Accepted: 10/27/2018] [Indexed: 01/22/2023]
Abstract
Wound healing is a complex process involving multiple biochemical and cellular events and represents a neglected public health issue. As a consequence, millions of people worldwide suffer from chronic wounds. The search for new treatment alternatives is therefore an important issue. In the context of wound healing, Maggot Debridement Therapy (MDT) is an inexpensive treatment with few contraindications and very promising results. This study aimed to evaluate the in vitro feasibility and implications of larvae (= MDT) use when combined with topical agents as a strategy to identify additive or synergistic combinations. The weight and survival rate of Cochliomyia macellaria (Fabricius) (Insecta, Diptera, Calliphoridae) larvae reared in an in vitro wound with either honey, hydrogel, 10% papain gel, essential fatty acids (EFA), collagenase, or silver sulfadiazine were evaluated after 24, 48 and 72 h. Hydrogel (for weight: 24 and 72 h; for survival: 24 h) and 10% papain gel (for weight: 48 h; for survival: 48 and 72 h) demonstrated the least interference in larval weight gain and survival rate, when compared to the control group. The results obtained in this study showed that the combined use of larvae and hydrogel or 10% papain gel may be promising to maximize the tissue repair. Honey, EFA and collagenase could be used to prepare the bed of the dry wounds to receive the MDT.
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Alvarez Garcia DM, Pérez-Hérazo A, Amat E. Life History of Cochliomyia macellaria (Fabricius, 1775) (Diptera, Calliphoridae), a Blowfly of Medical and Forensic Importance. NEOTROPICAL ENTOMOLOGY 2017; 46:606-612. [PMID: 28265808 DOI: 10.1007/s13744-017-0496-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 02/12/2017] [Indexed: 06/06/2023]
Abstract
The life history traits of blow fly Cochliomyia macellaria (Fabricius, 1775) was studied under semi-controlled laboratory conditions at 29.14°C temperature, 72.53% relative humidity, and 12-h photoperiod. The raw data were analyzed based on the age-stage, two-sex life table, considering the development rates among individuals of both sexes. Cochliomyia macellaria survival rate was 0.43 (♂) and 0.40 (♀), while life expectancy was 17.9 (♂) and 20.9 (♀) days, for adult males and females, respectively. The total fecundity was 681.15 eggs/female, with an average of 3.65 batches/female and 199 eggs/batch. The intrinsic rate of increase (r) was 0.327 days-1, the finite rate of population increase (λ) was 3.35 days-1, the mean generation time (T) was 17.15 days, and the net reproduction rate (R 0 ) was 272.46 offspring/individual. The population parameters found here corroborates that C. macellaria population act as a r selected species under laboratory conditions. Additionally, development data and accumulated degree days (ADD) for each stage of C. macellaria are provided and its implications for the forensic use are discussed.
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Affiliation(s)
- D M Alvarez Garcia
- Grupo de Investigación en Zoología y Ecología, Univ de Sucre, Sincelejo, Colombia.
- Lab de Sistemática e Biogeografia de Insecta, Instituto de Biociências, Univ de São Paulo, Rua do Matão, Travessa 14, n.101, São Paulo, SP, CEP 05508-900, Brasil.
| | - A Pérez-Hérazo
- Grupo de Investigación en Biotecnología Vegetal, Univ de Sucre, Sincelejo, Colombia
| | - E Amat
- Grupo de Investigación en Ciencias Forenses y Salud-GICFS, Tecnológico de Antioquia-Institución Universitario, Medellín, Colombia
- Instituto Nacional de Pesquisas da Amazônia-INPA, CBIO-Coordenação de Biodiversidade, Manaus, Amazonas, Brasil
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10
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Masiero FS, Aquino MFK, Nassu MP, Pereira DIB, Leite DS, Thyssen PJ. First Record of Larval Secretions of Cochliomyia macellaria (Fabricius, 1775) (Diptera: Calliphoridae) Inhibiting the Growth of Staphylococcus aureus and Pseudomonas aeruginosa. NEOTROPICAL ENTOMOLOGY 2017; 46:125-129. [PMID: 27696133 DOI: 10.1007/s13744-016-0444-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Accepted: 09/05/2016] [Indexed: 06/06/2023]
Abstract
Maggot debridement therapy (MDT) consists on the intentional and controlled application of sterilized larvae of the order Diptera on necrotic skin lesions with the purpose of cleaning necrotic tissue and removing pathogenic bacteria. During MDT, a marked antimicrobial activity has been reported in literature specially associated with antibacterial substances from Lucilia sericata (Meigen); however, regarding Cochliomyia macellaria (Fabricius), little is known. This study aimed to evaluate in vitro inhibition of bacterial growth of Pseudomonas aeruginosa and Staphylococcus aureus in contact with excretions and secretions (ES) from C. macellaria larvae. Larval ES were extracted in sterile distilled water and divided in three groups: ES, containing 400 μL of autoclaved ES; ES+BAC, containing 400 μL of autoclaved ES+0.5-μL bacterial inoculum; and CONT-BAC, containing 400 μL of sterile distilled water +0.5 μL of bacterial inoculum. Aliquots of each experimental group were plated by spreading onto Petri dishes. Seedings were made at 0, 1, 2, 4, and 12 h after the extraction of ES. In ES+BAC groups, inhibition of S. aureus was verified between times 1 and 2 h and P. aeruginosa was inhibited between 0 and 4 h. There was no growth observed in any ES group. In the CONT-BAC groups, the number of colonies from time 4 h became countless for S. aureus and decreased for P. aeruginosa. As reported in the literature, we note here that ES have excellent bactericidal activity for both gram-positive and gram-negative bacteria, and this study shows for the first time the action of the bactericidal activity of exosecretions of C. macellaria against S. aureus and P. aeruginosa.
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Affiliation(s)
- F S Masiero
- Dept of Microbiology and Parasitology, Federal Univ of Pelotas, Pelotas, Brasil
| | - M F K Aquino
- Dept of Animal Biology, State Univ of Campinas, 255 Monteiro Lobato St, 13083-862, Campinas, SP, Brasil.
| | - M P Nassu
- Dept of Animal Biology, State Univ of Campinas, 255 Monteiro Lobato St, 13083-862, Campinas, SP, Brasil
| | - D I B Pereira
- Dept of Microbiology and Parasitology, Federal Univ of Pelotas, Pelotas, Brasil
| | - D S Leite
- Dept of Genetics, Evolution and BioAgents, State Univ of Campinas, Campinas, Brasil
| | - P J Thyssen
- Dept of Animal Biology, State Univ of Campinas, 255 Monteiro Lobato St, 13083-862, Campinas, SP, Brasil
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Guo SC, Tao SC, Yin WJ, Qi X, Yuan T, Zhang CQ. Exosomes derived from platelet-rich plasma promote the re-epithelization of chronic cutaneous wounds via activation of YAP in a diabetic rat model. Theranostics 2017; 7:81-96. [PMID: 28042318 PMCID: PMC5196887 DOI: 10.7150/thno.16803] [Citation(s) in RCA: 301] [Impact Index Per Article: 43.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2016] [Accepted: 09/13/2016] [Indexed: 12/20/2022] Open
Abstract
Chronic wounds have become an economic, social, and public health burden and need advanced treatment. Platelet-rich plasma (PRP) has been used extensively in treatment of chronic wounds because it contains an abundance of growth factors secreted by platelets. The exosomes derived from PRP (PRP-Exos) have been proven to encapsulate principal growth factors from platelets. This study is the first to show that these exosomes may exert the function of PRP. PRP-Exos can effectively induce proliferation and migration of endothelial cells and fibroblasts to improve angiogenesis and re-epithelialization in chronic wounds. We regulated YAP to verify the PRP-Exos-dependent effect on fibroblast proliferation and migration through YAP activation. In vivo, we observed the cutaneous healing process in chronic wounds treated with PRP-Exos in a diabetic rat model. We provide evidence of the probable molecular mechanisms underlying the PRP effect on healing of chronic ulcers and describe a promising resource of growth factors from exosomes without species restriction.
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