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Liang S, Wang X, Sun S, Xie L, Dang X. Extraction of chitin from flammulina velutipes waste: A low-concentration acid pretreatment and aspergillus Niger fermentation approach. Int J Biol Macromol 2024:133224. [PMID: 38897518 DOI: 10.1016/j.ijbiomac.2024.133224] [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: 12/16/2023] [Revised: 06/03/2024] [Accepted: 06/15/2024] [Indexed: 06/21/2024]
Abstract
In recent years, with the booming of the edible mushroom industry, chitin production has become increasingly dependent on fungi and other non-traditional sources. Fungal chitin has advantages including superior performance, simpler separation processes, abundant raw materials, and the absence of shellfish allergens. As a kind of edible mushroom, flammulina velutipes (F. velutipes) also has the advantages of wide source and large annual yield. This provided the possibility for the extraction of chitin. Here, a procedure to extract chitin from F. velutipes waste be presented. This method comprises low-concentration acid pretreatment coupled with consolidated bioprocessing with Aspergillus niger. Characterization by SEM, FTIR, XRD, NMR, and TGA confirmed that the extracted chitin was β-chitin. To achieve optimal fermentation of F. velutipes waste (80 g/L), ammonium sulfate and glucose were selected as nitrogen and carbon sources (5 g/L), with a fermentation time of 5 days. The extracted chitin could be further deacetylated and purified to obtain high-purity chitosan (99.2 % ± 1.07 %). This chitosan exhibited a wide degree of deacetylation (50.0 % ± 1.33 % - 92.1 % ± 0.97 %) and a molecular weight distribution of 92-192 kDa. Notably, the yield of chitosan extracted in this study was increased by 56.3 % ± 0.47 % compared to the traditional chemical extraction method.
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Affiliation(s)
- Shuang Liang
- Institute of Biomass and Function Materials & National Demonstration Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China; Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi 710021, PR China
| | - Xuechuan Wang
- Institute of Biomass and Function Materials & National Demonstration Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China.
| | - Siwei Sun
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, PR China
| | - Long Xie
- College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi 710021, PR China
| | - Xugang Dang
- Institute of Biomass and Function Materials & National Demonstration Centre for Experimental Light Chemistry Engineering Education, College of Bioresources Chemistry and Materials Engineering, Shaanxi University of Science and Technology, Xi'an 710021, PR China; Hubei Provincial Engineering Laboratory for Clean Production and High-Value Utilization of Bio-Based Textile Materials, Wuhan Textile University, Wuhan 430200, PR China.
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Broda M, Yelle DJ, Serwańska-Leja K. Biodegradable Polymers in Veterinary Medicine-A Review. Molecules 2024; 29:883. [PMID: 38398635 PMCID: PMC10892962 DOI: 10.3390/molecules29040883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 02/03/2024] [Accepted: 02/13/2024] [Indexed: 02/25/2024] Open
Abstract
During the past two decades, tremendous progress has been made in the development of biodegradable polymeric materials for various industrial applications, including human and veterinary medicine. They are promising alternatives to commonly used non-degradable polymers to combat the global plastic waste crisis. Among biodegradable polymers used, or potentially applicable to, veterinary medicine are natural polysaccharides, such as chitin, chitosan, and cellulose as well as various polyesters, including poly(ε-caprolactone), polylactic acid, poly(lactic-co-glycolic acid), and polyhydroxyalkanoates produced by bacteria. They can be used as implants, drug carriers, or biomaterials in tissue engineering and wound management. Their use in veterinary practice depends on their biocompatibility, inertness to living tissue, mechanical resistance, and sorption characteristics. They must be designed specifically to fit their purpose, whether it be: (1) facilitating new tissue growth and allowing for controlled interactions with living cells or cell-growth factors, (2) having mechanical properties that address functionality when applied as implants, or (3) having controlled degradability to deliver drugs to their targeted location when applied as drug-delivery vehicles. This paper aims to present recent developments in the research on biodegradable polymers in veterinary medicine and highlight the challenges and future perspectives in this area.
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Affiliation(s)
- Magdalena Broda
- Department of Wood Science and Thermal Techniques, Faculty of Forestry and Wood Technology, Poznan University of Life Sciences, Wojska Polskiego 28, 60-637 Poznan, Poland
| | - Daniel J. Yelle
- Forest Biopolymers Science and Engineering, Forest Products Laboratory, USDA Forest Service, One Gifford Pinchot Drive, Madison, WI 53726, USA;
| | - Katarzyna Serwańska-Leja
- Department of Animal Anatomy, Faculty of Veterinary Medicine and Animal Sciences, Poznan University of Life Sciences, Wojska Polskiego 71c, 60-625 Poznan, Poland;
- Department of Sports Dietetics, Poznan University of Physical Education, 61-871 Poznan, Poland
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3
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DeLong MR, Wells MW, Chang IA, Vardanian AJ, Harris H. Data Requirement for Animal-Derived Wound Care Devices: Limitations of the 510(k) Regulatory Pathway. J Am Coll Surg 2024; 238:218-224. [PMID: 37796150 DOI: 10.1097/xcs.0000000000000884] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
BACKGROUND Device classification and preclinical data requirements for animal-derived wound care products were recently reviewed by the FDA. Given the possible performance differences for these products, we evaluated the FDA data requirements as well as the published literature for all animal-derived wound care products ever cleared through the FDA. STUDY DESIGN The publicly available online database was queried for all animal-derived wound products; premarket data requirements for each product were recorded. A PubMed search was conducted to determine the number of published clinical studies for each product, and manufacturer websites were accessed to obtain the price for each product. RESULTS A total of 132 animal-derived wound products have been cleared by the FDA since the Center for Devices and Radiological Health was established in 1976. Of these, 114 had a publicly available clearance statement online. Preclinical biocompatibility testing was performed in 85 products (74.6%) and referenced in 10 (8.8%). Preclinical animal wound healing testing took place in 17 (14.9%). Only 9 products (7.9%) had clinical safety testing, and no products had clinical effectiveness data. We found no published peer-reviewed clinical data for 97 products (73%). Cost was infrequently available but ranged from $4.79 to $2,178 per unit. CONCLUSIONS Although the current pathway is appropriate for efficiently clearing new wound care products, clinical effectiveness is not included in the regulatory review process. Wound care products are primarily evaluated by the FDA for safety and biocompatibility. Thus, any claims of clinical effectiveness require independent validation, which is often lacking.
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Affiliation(s)
- Michael R DeLong
- From the division of Plastic and Reconstructive Surgery, Department of Surgery, University of California, Los Angeles, CA (DeLong, Vardanian)
| | - Michael W Wells
- From the division of Plastic and Reconstructive Surgery, Department of Surgery, University of California, Los Angeles, CA (DeLong, Vardanian)
- Case Western Reserve University, School of Medicine, Cleveland OH (Wells, Chang)
| | - Irene A Chang
- Case Western Reserve University, School of Medicine, Cleveland OH (Wells, Chang)
| | - Andrew J Vardanian
- From the division of Plastic and Reconstructive Surgery, Department of Surgery, University of California, Los Angeles, CA (DeLong, Vardanian)
| | - Hobart Harris
- Division of Gastrointestinal Surgery, Department of Surgery, University of California, San Francisco, CA (Harris)
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Xu H, Xiao GZ, Zheng YH, Fu YJ, Zhong SL, Ren DL, Li WR, Lin HC. A magnetic resonance imaging-based decision-making tool for predicting complex anal fistulas healing in the early postoperative period. BMC Gastroenterol 2023; 23:372. [PMID: 37907854 PMCID: PMC10617037 DOI: 10.1186/s12876-023-02963-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 09/18/2023] [Indexed: 11/02/2023] Open
Abstract
BACKGROUND Magnetic resonance imaging (MRI) has excellent accuracy in diagnosing preoperative lesions before anal fistula surgery. However, MRI is not good in identifying early recurrent lesions and effective methods for quantitative assessment of fistula healing are still warranted. This retrospective study aimed to develop and validate a specific MRI-based nomogram model to predict fistula healing during the early postoperative period. METHODS Patients with complex cryptoglandular anal fistulas who underwent surgery between January 2017 and October 2020 were included in this study. MRI features and clinical parameters were analyzed using univariate and multivariate logistic regression analysis. A nomogram for predicting fistula healing was constructed and validated. RESULTS In total, 200 patients were included, of whom 186 (93%) were male, with a median age of 36 (18-65) years. Of the fistulas, 58.5% were classified as transsphincteric and 19.5% as suprasphincteric. The data were randomly divided into the training cohort and testing cohort at a ratio of 7:3. Logistic analysis revealed that CNR, ADC, alcohol intake history, and suprasphincteric fistula were significantly correlated with fistula healing. These four predictors were used to construct a predictive nomogram model in the training cohort. AUC was 0.880 and 0.847 for the training and testing cohorts, respectively. Moreover, the decision and calibration curves showed high coherence between the predicted and actual probabilities of fistula healing. CONCLUSIONS We developed a predictive model and constructed a nomogram to predict fistula healing during the early postoperative period. This model showed good performance and may be clinically utilized for the management of anal fistulas.
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Affiliation(s)
- Hao Xu
- Department of Anorectal, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai, 200434, China
- Department of Anorectal Surgery, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, 201203, China
| | - Guo-Zhong Xiao
- Department of Colorectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Yuancun Er Heng Lu, No. 26, Guangzhou, 510655, China
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510655, China
- Guangdong Institute of Gastroenterology, Guangzhou, 510655, China
| | - Yi-Hui Zheng
- Department of Colorectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Yuancun Er Heng Lu, No. 26, Guangzhou, 510655, China
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510655, China
- Guangdong Institute of Gastroenterology, Guangzhou, 510655, China
| | - Yuan-Ji Fu
- Department of Colorectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Yuancun Er Heng Lu, No. 26, Guangzhou, 510655, China
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510655, China
- Guangdong Institute of Gastroenterology, Guangzhou, 510655, China
| | - Sheng-Lan Zhong
- Department of Anorectal, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai, 200434, China
| | - Dong-Lin Ren
- Department of Colorectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Yuancun Er Heng Lu, No. 26, Guangzhou, 510655, China
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510655, China
- Guangdong Institute of Gastroenterology, Guangzhou, 510655, China
| | - Wen-Ru Li
- Department of Radiology, The Sixth Affiliated Hospital, Sun Yat-sen University, Yuancun Er Heng Lu, No. 26, Guangzhou, 510655, China.
| | - Hong-Cheng Lin
- Department of Colorectal Surgery, The Sixth Affiliated Hospital, Sun Yat-sen University, Yuancun Er Heng Lu, No. 26, Guangzhou, 510655, China.
- Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, The Sixth Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510655, China.
- Guangdong Institute of Gastroenterology, Guangzhou, 510655, China.
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Cao X, Lin X, Li N, Zhao X, Zhou M, Zhao Y. Animal tissue-derived biomaterials for promoting wound healing. MATERIALS HORIZONS 2023; 10:3237-3256. [PMID: 37278612 DOI: 10.1039/d3mh00411b] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The skin serves as the primary barrier between the human body and external environment, and is therefore susceptible to damage from various factors. In response to this challenge, animal tissue-derived biomaterials have emerged as promising candidates for wound healing due to their abundant sources, low side-effect profiles, exceptional bioactivity, biocompatibility, and unique extracellular matrix (ECM) mimicry. The evolution of modern engineering technology and therapies has allowed these animal tissue-derived biomaterials to be transformed into various forms and modified to possess the necessary properties for wound repair. This review provides an overview of the wound healing process and the factors that influence it. We then describe the extraction methods, important properties, and recent practical applications of various animal tissue-derived biomaterials. Our focus then shifts to the critical properties of these biomaterials in skin wound healing and their latest research developments. Finally, we critically examine the limitations and future prospects of biomaterials generated from animal tissues in this field.
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Affiliation(s)
- Xinyue Cao
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Xiang Lin
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Ning Li
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Xiaozhi Zhao
- Department of Andrology, Nanjing Drum Tower Hospital, Medical School, Nanjing University, Nanjing 210008, China.
| | - Min Zhou
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
| | - Yuanjin Zhao
- Department of Vascular Surgery, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing, 210096, China.
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Guidoni M, de Sousa Júnior AD, Aragão VPM, de Melo Costa Pereira T, Dos Santos WC, Monteiro FC, Guimarães MCC, Fronza M. Liposomal stem cell extract formulation from Coffea canephora shows outstanding anti-inflammatory activity, increased tissue repair, neocollagenesis and neoangiogenesis. Arch Dermatol Res 2023; 315:491-503. [PMID: 36114867 DOI: 10.1007/s00403-022-02388-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 07/26/2022] [Accepted: 09/07/2022] [Indexed: 11/02/2022]
Abstract
Coffea canephora plant stem cells can have bioactive compounds with tissue repairing and anti-inflammatory action. This study aimed to develop a liposomal stem cell extract formulation obtained from the leaves of C. canephora (LSCECC) and to investigate its capacity to contribute to the dynamic mechanisms of tissue repair. The liposome cream was developed and characterized through the dynamic light scattering technique, atomic force microscopy, and transmission electron microscopy. The excisional full-thickness skin wound model was used and daily topically treated with the LSCECC formulation or vehicle control. On days 2, 7, 14, and 21 after wounding, five rats from each group were euthanized and the rates of wound closure and re-epithelialization were evaluated using biochemical and histological tests. LSCECC resulted in faster re-epithelialization exhibiting a significant reduction in wound area of 36.4, 42.4, and 87.5% after 7, 10, and 14 days, respectively, when compared to vehicle control. LSCECC treated wounds exhibited an increase in granular tissue and a proper inflammatory response mediated by the reduction of pro-inflammatory cytokines like TNF-α and IL-6 and an increase of IL-10. Furthermore, wounds treated with LSCECC showed an increase in the deposition and organization of collagen fibers at the wound site and improved scar tissue quality due to the increase in transforming growth factor-beta and vascular endothelial growth factor. Our data showed that LSCECC improves wound healing, the formation of extracellular matrix, modulates inflammatory response, and promotes neovascularization being consider a promising bioactive extract to promote and support healthy skin. The graphical presents the action of LSCECC in all four phases of wound healing and tissue repair. The LSCECC can reduce the inflammatory infiltrate in the inflammatory phase by decreasing the pro-inflammatory cytokines like IL-6 and TNF-α, in addition to maintaining this modulation through lesser activation and recruitment of macrophages. The LSCECC can also increase the release of IL-10, an anti-inflammatory cytokine, decreasing local edema. The increase in VEGF provides neovascularization and the supply of nutrients to newly repaired tissue. Finally, signaling via TGF-β increases the production and organization of collagen fibers in the remodeling phase.
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Affiliation(s)
- Marcio Guidoni
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, n°21, Boa Vista, Vila Velha, ES, 29102-920, Brazil
| | - Antônio Domingos de Sousa Júnior
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, n°21, Boa Vista, Vila Velha, ES, 29102-920, Brazil
| | - Victor Paulo Mesquita Aragão
- Pesquisador do Instituto Capixaba de Ciências e Administração (ICCA), Programa de Desenvolvimento Científico e Tecnológico Regional (FAPES/CNPq), Vila Velha, ES, Brazil
| | - Thiago de Melo Costa Pereira
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, n°21, Boa Vista, Vila Velha, ES, 29102-920, Brazil
| | - Wedson Correa Dos Santos
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, n°21, Boa Vista, Vila Velha, ES, 29102-920, Brazil
| | - Flavio Cunha Monteiro
- Pesquisador do Instituto Capixaba de Ciências e Administração (ICCA), Programa de Desenvolvimento Científico e Tecnológico Regional (FAPES/CNPq), Vila Velha, ES, Brazil
| | | | - Marcio Fronza
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, n°21, Boa Vista, Vila Velha, ES, 29102-920, Brazil.
- Pesquisador do Instituto Capixaba de Ciências e Administração (ICCA), Programa de Desenvolvimento Científico e Tecnológico Regional (FAPES/CNPq), Vila Velha, ES, Brazil.
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Maldonado-Cabrera B, Sánchez-Machado DI, López-Cervantes J, Osuna-Chávez RF, Ibarra-Zazueta C, Robles-Zepeda RE. Efficacy of chitosan in the treatment of chronic skin lesions in a horse: A case report. Vet Anim Sci 2022; 17:100261. [PMID: 35856003 PMCID: PMC9287356 DOI: 10.1016/j.vas.2022.100261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 06/26/2022] [Accepted: 06/26/2022] [Indexed: 10/30/2022] Open
Abstract
A case of a Gypsy Vanner horse with chronic foreskin lesion is reported. Chronic skin lesions in horses are a diagnostic challenge. Topical application of chitosan favors healing in horses with chronic skin lesions. Chitosan prevents complications in chronic skin lesions in horses.
Consultation was requested for a 7-year-old Gypsy Vanner male horse with a 2-year history of foreskin injury. Upon revision, an ulcer, 153 cm2 in size, with yellowish granules was observed; a RESVECH 2.0 evaluation revealed a score of 32/35 points. Medical history confirmed multiple failed deworming, anti-inflammatory, and antibiotic treatments with different topical therapies and recurrence in summer. Laboratory results confirmed elevated total proteins (8.8 g/dL) and globulins (5.5 g/dL), negative bacterial and fungal cultures, as well as negative coproparasitoscopic findings, and finally, identification of stable fly larvae (Stomoxys calcitrans) in the feces. Microscopy showed disorganized collagen, thickened tissue, polymorphonuclear cells, and acanthosis without neoplastic tissue or parasite remains. Debridement was performed and systemic treatment with ivermectin, penicillin, and non-steroidal anti-inflammatory drugs (NSAIDs) continued. In addition, 2% chitosan gel and films were applied to the entire surface of the lesion for 72 hours on 30 occasions; vector control with nets and insecticides was performed. On day 94, there was a 6 cm2 surface with involvement of the dermal and epidermal layers, moist epithelial tissue, and diffuse edges, with a RESVECH 2.0 evaluation of 6/35 points. Microscopy showed an intact basement membrane, presence of hair follicles, sweat glands, aligned collagen, and angiogenesis. It was concluded that chronic skin lesions in horses represent a diagnostic challenge, and topical chitosan is an adequate treatment due to its biocompatibility and efficacy, in addition to the functional and cosmetic results in dermal regeneration.
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Ijaola AO, Akamo DO, Damiri F, Akisin CJ, Bamidele EA, Ajiboye EG, Berrada M, Onyenokwe VO, Yang SY, Asmatulu E. Polymeric biomaterials for wound healing applications: a comprehensive review. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2022; 33:1998-2050. [PMID: 35695023 DOI: 10.1080/09205063.2022.2088528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Chronic wounds have been a global health threat over the past few decades, requiring urgent medical and research attention. The factors delaying the wound-healing process include obesity, stress, microbial infection, aging, edema, inadequate nutrition, poor oxygenation, diabetes, and implant complications. Biomaterials are being developed and fabricated to accelerate the healing of chronic wounds, including hydrogels, nanofibrous, composite, foam, spongy, bilayered, and trilayered scaffolds. Some recent advances in biomaterials development for healing both chronic and acute wounds are extensively compiled here. In addition, various properties of biomaterials for wound-healing applications and how they affect their performance are reviewed. Based on the recent literature, trilayered constructs appear to be a convincing candidate for the healing of chronic wounds and complete skin regeneration because they mimic the full thickness of skin: epidermis, dermis, and the hypodermis. This type of scaffold provides a dense superficial layer, a bioactive middle layer, and a porous lower layer to aid the wound-healing process. The hydrophilicity of scaffolds aids cell attachment, cell proliferation, and protein adhesion. Other scaffold characteristics such as porosity, biodegradability, mechanical properties, and gas permeability help with cell accommodation, proliferation, migration, differentiation, and the release of bioactive factors.
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Affiliation(s)
| | - Damilola O Akamo
- The Bredesen Center for Interdisciplinary Research and Graduate Education, University of Tennessee, Knoxville, TN, USA
| | - Fouad Damiri
- Laboratory of Biomolecules and Organic Synthesis (BIOSYNTHO), Department of Chemistry, Faculty of Sciences Ben M'Sick, University Hassam II of Casablanca, Casablanca, Morocco
| | | | | | | | - Mohammed Berrada
- Laboratory of Biomolecules and Organic Synthesis (BIOSYNTHO), Department of Chemistry, Faculty of Sciences Ben M'Sick, University Hassam II of Casablanca, Casablanca, Morocco
| | | | - Shang-You Yang
- Department of Orthopaedic Surgery, University of Kansas School of Medicine-Wichita, Wichita, KS, USA.,Biological Sciences, Wichita State University, Wichita, KS, USA
| | - Eylem Asmatulu
- Department of Mechanical Engineering, Wichita State University, Wichita, KS, USA
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Reptiles as Promising Sources of Medicinal Natural Products for Cancer Therapeutic Drugs. Pharmaceutics 2022; 14:pharmaceutics14040874. [PMID: 35456708 PMCID: PMC9025323 DOI: 10.3390/pharmaceutics14040874] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 04/12/2022] [Accepted: 04/13/2022] [Indexed: 12/14/2022] Open
Abstract
Natural products have historically played an important role as a source of therapeutic drugs for various diseases, and the development of medicinal natural products is still a field with high potential. Although diverse drugs have been developed for incurable diseases for several decades, discovering safe and efficient anticancer drugs remains a formidable challenge. Reptiles, as one source of Asian traditional medicines, are known to possess anticancer properties and have been used for a long time without a clarified scientific background. Recently, it has been reported that extracts, crude peptides, sera, and venom isolated from reptiles could effectively inhibit the survival and proliferation of various cancer cells. In this article, we summarize recent studies applying ingredients derived from reptiles in cancer therapy and discuss the difficulties and prospective development of natural product research.
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Schäfer S, Smeets R, Köpf M, Drinic A, Kopp A, Kröger N, Hartjen P, Assaf AT, Aavani F, Beikler T, Peters U, Fiedler I, Busse B, Stürmer EK, Vollkommer T, Gosau M, Fuest S. Antibacterial properties of functionalized silk fibroin and sericin membranes for wound healing applications in oral and maxillofacial surgery. BIOMATERIALS ADVANCES 2022; 135:212740. [PMID: 35929202 DOI: 10.1016/j.bioadv.2022.212740] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 02/13/2022] [Accepted: 02/25/2022] [Indexed: 06/15/2023]
Abstract
Oral wounds are among the most troublesome injuries which easily affect the patients' quality of life. To date, the development of functional antibacterial dressings for oral wound healing remains a challenge. In this regard, we investigated antibacterial silk protein-based membranes for the application as wound dressings in oral and maxillofacial surgery. The present study includes five variants of casted membranes, i.e., i) membranes-silver nanoparticles (CM-Ag), ii) membranes-gentamicin (CM-G), iii) membranes-control (without functionalization) (CM-C), iv) membranes-silk sericin control (CM-SSC), and v) membranes-silk fibroin/silk sericin (CM-SF/SS), and three variants of nonwovens, i.e., i) silver nanoparticles (NW-Ag), ii) gentamicin (NW-G), iii) control (without functionalization) (NW-C). The surface structure of the samples was visualized with scanning electron microscopy. In addition, antibacterial testing was accomplished using agar diffusion assay, colony forming unit (CFU) analysis, and qrt-PCR. Following antibacterial assays, biocompatibility was evaluated by cell proliferation assay (XTT), cytotoxicity assay (LDH), and live-dead assay on L929 mouse fibroblasts. Findings indicated significantly lower bacterial colony growth and DNA counts for CM-Ag with a reduction of bacterial counts by 3log levels (99.9% reduction) in CFU and qrt-PCR assay compared to untreated control membranes (CM-C and CM-SSC) and membranes functionalized with gentamicin (CM-G and NW-G) (p < 0.001). Similarly, NW-G yielded significantly lower DNA and colony growth counts compared to NW-Ag and NW-C (p < 0.001). In conclusion, CM-Ag represented 1log level better antibacterial activity compared to NW-G, whereas NW-G showed better cytocompatibility for L929 cells. As data suggest, these two membranes have the potential of application in the field of bacteria-free oral wound healing. However, provided that loading strategy and cytocompatibility are adjusted according to the antibacterial agents' characteristic and fabrication technique of the membranes.
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Affiliation(s)
- Sogand Schäfer
- Department of Oral and Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, University Hospital Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Ralf Smeets
- Department of Oral and Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, University Hospital Hamburg-Eppendorf, 20251 Hamburg, Germany; Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | | | | | | | - Nadja Kröger
- Department of Plastic, Reconstructive and Aesthetic Surgery, University Hospital of Cologne, 50937 Cologne, Germany
| | - Philip Hartjen
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Alexandre Thomas Assaf
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Farzaneh Aavani
- Department of Oral and Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, University Hospital Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Thomas Beikler
- Department of Periodontics, Preventive and Restorative Dentistry, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Ulrike Peters
- Department of Periodontics, Preventive and Restorative Dentistry, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Imke Fiedler
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Björn Busse
- Department of Osteology and Biomechanics, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Ewa K Stürmer
- Department of Vascular Medicine, University Heart Center, Translational Wound Research, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Tobias Vollkommer
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Martin Gosau
- Department of Oral and Maxillofacial Surgery, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany.
| | - Sandra Fuest
- Department of Oral and Maxillofacial Surgery, Division of Regenerative Orofacial Medicine, University Hospital Hamburg-Eppendorf, 20251 Hamburg, Germany.
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11
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Maldonado-Cabrera B, Sánchez-Machado DI, López-Cervantes J, Osuna-Chávez RF, Escárcega-Galaz AA, Robles-Zepeda RE, Sanches-Silva A. Therapeutic effects of chitosan in veterinary dermatology: A systematic review of the literature. Prev Vet Med 2021; 190:105325. [PMID: 33744675 DOI: 10.1016/j.prevetmed.2021.105325] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/01/2021] [Accepted: 03/07/2021] [Indexed: 01/20/2023]
Abstract
Chitosan is a natural polysaccharide with biocompatibility, biodegradability, nontoxicity, antimicrobial, and hemostatic properties. This biopolymer has been used in different pharmaceutical forms; therefore, it has an attractive potential for dermal applications in veterinary medicine. The aim of this review is to assess the healing potential of chitosan, based on its dermatological effects on animals, to enrich the therapeutic options of veterinary clinicians. A systematic review was conducted based on the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) strategy, retrieving 1,032 studies and selecting 39 after the inclusion and exclusion criteria were applied. The studies included reports with confirmed positive effects (n = 46/99, 46.5 %) (P < 0.05), with positive effects (n = 49.5/99, 49.5 %), and with no effect (n = 4/99, 4 %); none of the studies reported adverse effects. There is an association between frequency of application and a decrease in healing time (P = 0.038); applying chitosan "every 48-72 hours" was the most recommended frequency (n = 10/19, 52.9 %). Chitosan, when applied to skin lesions on animals, produces positive effects on healing, potentially becoming a safe biomaterial for skin treatments in veterinary practice. As an initial protocol, we suggest applying chitosan every 48-72 hours for at least 2 weeks (7 applications).
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Affiliation(s)
| | | | | | | | | | | | - Ana Sanches-Silva
- National Institute of Agrarian and Veterinary Research, Vila do Conde, Portugal; Center for Study in Animal Science (CECA), University of Oporto, Oporto, Portugal
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12
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He Y, Wang J, Si Y, Wang X, Deng H, Sheng Z, Li Y, Liu J, Zhao J. A novel gene recombinant collagen hemostatic sponge with excellent biocompatibility and hemostatic effect. Int J Biol Macromol 2021; 178:296-305. [PMID: 33636269 DOI: 10.1016/j.ijbiomac.2021.02.162] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 02/20/2021] [Accepted: 02/21/2021] [Indexed: 12/31/2022]
Abstract
Effect and biosafety are the most noteworthy aspect of the hemostatic materials for trauma treatment. In this work, we evaluated the biocompatibility and hemostatic effect of a novel recombinant collagen hemostatic sponge according to ISO 10993. In addition, the interaction between the recombinant collagen hemostatic sponge and blood cells was observed by scanning electron microscopy, moreover, the hemostatic effect was evaluated by blood clotting assay in vitro and liver hemorrhage models in vivo. As the results, the novel recombinant collagen hemostatic sponge enables to be biodegradable completely in vivo, without stimulation, sensitization, acute toxicity, hematolysis or obvious immune rejection. The procoagulant effect of recombinant hemostatic sponge in vitro is significantly more excellent than that of natural collagen sponge due to the more promotive capacity of blood cell adhesion. Meanwhile, the liver hemorrhage models showed that the hemostatic time of recombinant collagen sponge was 19.33 ± 4.64 s, which was significantly better than that of natural collagen sponge (hemostatic time 31.62 ± 5.63 s). Therefore, the novel recombinant collagen hemostatic sponge with satisfactory biocompatibility and significant hemostatic effect can be performed as a potential novel type of clinical hemostatic products for research and development.
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Affiliation(s)
- Yue He
- Medical Research and Development Center, Shaanxi Huikang Bio-Tech Co., Ltd., Xi'an 710054, China
| | - Jiuna Wang
- Medical Research and Development Center, Shaanxi Huikang Bio-Tech Co., Ltd., Xi'an 710054, China
| | - Yuan Si
- Medical Research and Development Center, Shaanxi Huikang Bio-Tech Co., Ltd., Xi'an 710054, China
| | - Xin Wang
- Medical Research and Development Center, Shaanxi Huikang Bio-Tech Co., Ltd., Xi'an 710054, China
| | - Han Deng
- Medical Research and Development Center, Shaanxi Huikang Bio-Tech Co., Ltd., Xi'an 710054, China
| | - ZhiGang Sheng
- Medical Research and Development Center, Shaanxi Huikang Bio-Tech Co., Ltd., Xi'an 710054, China
| | - Yuan Li
- Medical Research and Development Center, Shaanxi Huikang Bio-Tech Co., Ltd., Xi'an 710054, China; Medical College of Xi'an Peihua University, Xi'an, Shaanxi 710125, China
| | - JianLi Liu
- Medical Research and Development Center, Shaanxi Huikang Bio-Tech Co., Ltd., Xi'an 710054, China; College of Life Science, Northwest University, Xi'an, Shaanxi 710069, China
| | - Jinli Zhao
- Medical Research and Development Center, Shaanxi Huikang Bio-Tech Co., Ltd., Xi'an 710054, China.
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13
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Bostan F, Surmeli NB. Cloning, expression, and characterization of a novel sericin-like protein. Biotechnol Appl Biochem 2020; 69:136-144. [PMID: 33368658 DOI: 10.1002/bab.2089] [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: 10/02/2020] [Accepted: 12/13/2020] [Indexed: 11/08/2022]
Abstract
Silk consists of two proteins called fibroin and sericin. While fibroin is used in the textile industry and has various biomaterial applications, sericin has been considered as waste material until recently. Sericin is a multicomponent protein and it has important properties such as biocompatibility, biodegradability, cryoprotectivity, and antioxidant. Sericin from silkworm cocoons can be obtained by chemical, enzymatic, and heat treatment methods. However, sericin obtained with these treatment methods is not of consistent and high quality. Moreover, the exposure of sericin to harsh conditions during extraction leads to inconsistencies in the composition and structure of the sericin obtained. The inconsistencies in sericin structure and composition decrease application of sericin as a biomaterial. Here, we produce a sericin-like protein (Ser4mer) with native sequence of sericin encoding four repeats of the conserved 38 amino acid motif recombinantly in Escherichia coli and characterize its structural properties. Ser4mer protein shows similar structure to native sericin and higher solubility than previously obtained recombinant sericin-like proteins. Recombinant production of a soluble sericin-like protein will significantly expand its applications as a biomaterial. In addition, recombinant production of silk proteins will allow us to understand sequence-structure relationships in these proteins.
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Affiliation(s)
- Fatmanur Bostan
- Program in Biotechnology and Bioengineering, İzmir Institute of Technology, Gülbahce, Urla Izmir, Turkey
| | - Nur Basak Surmeli
- Department of Bioengineering, İzmir Institute of Technology, Gülbahce, Urla Izmir, Turkey
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14
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Guidoni M, Figueira MM, Ribeiro GP, Lenz D, Grizotto PA, de Melo Costa Pereira T, Scherer R, Bogusz S, Fronza M. Development and evaluation of a vegetable oil blend formulation for cutaneous wound healing. Arch Dermatol Res 2019; 311:443-452. [PMID: 31011875 DOI: 10.1007/s00403-019-01919-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 03/01/2019] [Accepted: 04/13/2019] [Indexed: 11/26/2022]
Abstract
This work aimed to evaluate the in vivo capacity of a vegetable oil blend formulation (VOB) developed to accelerate cutaneous wound closure. Total thickness wounds were punctured on the skin on the back side of each animal and topically treated with the VOB formulation, Dersani® ointment or the vehicle control. After 2, 7, 14, 21 days post-wounding, five animals from each group were euthanized, and the rates of wound closure and re-epithelialization were evaluated. The wounds were harvested for histological and biochemical analysis. VOB resulted in faster and greater re-epithelialization in the in vivo excisional wounds, exhibiting significant wound area reduction of 8.9, 8.0, 35.1, 45.2 and 47.0% after 2, 5, 10, 14 and 21 days post-wounding, respectively, when compared with the vehicle control. Histological and biochemical analyses showed that the VOB-treated wounds exhibited a significant increase of granular tissue and controlled inflammatory response by modulation of the release of pro-inflammatory cytokines TNF-α, IL-6 and IL-1. Moreover, VOB-treated wounds showed a significant and concrete increase in the deposition and organisation of collagen fibres in the wound site and improved the quality of the scar tissue. Altogether, these data revealed that VOB accelerates wound healing processes and might be beneficial for treating wound disorders.
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Affiliation(s)
- Marcio Guidoni
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, no. 21, Boa Vista, Vila Velha, Espírito Santo, 29102-920, Brazil
| | - Mariana Moreira Figueira
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, no. 21, Boa Vista, Vila Velha, Espírito Santo, 29102-920, Brazil
| | - Gabrielly Pereira Ribeiro
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, no. 21, Boa Vista, Vila Velha, Espírito Santo, 29102-920, Brazil
| | - Dominik Lenz
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, no. 21, Boa Vista, Vila Velha, Espírito Santo, 29102-920, Brazil
| | - Pamela Aparecida Grizotto
- Instituto de Química de São Carlos-IQSC, Universidade de São Paulo-USP, São Carlos, São Paulo, Brazil
| | - Thiago de Melo Costa Pereira
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, no. 21, Boa Vista, Vila Velha, Espírito Santo, 29102-920, Brazil
| | - Rodrigo Scherer
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, no. 21, Boa Vista, Vila Velha, Espírito Santo, 29102-920, Brazil
| | - Stanislau Bogusz
- Instituto de Química de São Carlos-IQSC, Universidade de São Paulo-USP, São Carlos, São Paulo, Brazil
| | - Marcio Fronza
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha-UVV, Av. Comissário José Dantas de Melo, no. 21, Boa Vista, Vila Velha, Espírito Santo, 29102-920, Brazil.
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15
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Saccani M, Parisi L, Bergonzi C, Bianchera A, Galli C, Macaluso GM, Bettini R, Elviri L. Surface modification of chitosan films with a fibronectin fragment-DNA aptamer complex to enhance osteoblastic cell activity: A mass spectrometry approach probing evidence on protein behavior. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2019; 33:336-342. [PMID: 30398689 DOI: 10.1002/rcm.8335] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 10/24/2018] [Accepted: 10/25/2018] [Indexed: 06/08/2023]
Affiliation(s)
- Martina Saccani
- Department of Food and Drug Science, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
| | - Ludovica Parisi
- Department of Biomedical, Biotechnological and Translational Sciences, University of Parma, Parma, Italy
- Centro Universitario di Odontoiatria, University of Parma, Via Gramsci 14, 43126, Parma, Italy
| | - Carlo Bergonzi
- Department of Food and Drug Science, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
| | - Annalisa Bianchera
- Interdepartmental Centre Biopharmanet-Tec, University of Parma Parco, Area delle Scienze 27/A, 43124, Parma, Italy
| | - Carlo Galli
- Department of Biomedical, Biotechnological and Translational Sciences, University of Parma, Parma, Italy
- Centro Universitario di Odontoiatria, University of Parma, Via Gramsci 14, 43126, Parma, Italy
| | - Guido Maria Macaluso
- Department of Biomedical, Biotechnological and Translational Sciences, University of Parma, Parma, Italy
- Centro Universitario di Odontoiatria, University of Parma, Via Gramsci 14, 43126, Parma, Italy
| | - Ruggero Bettini
- Department of Food and Drug Science, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
| | - Lisa Elviri
- Department of Food and Drug Science, University of Parma, Parco Area delle Scienze 27/A, 43124, Parma, Italy
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16
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Guidoni M, de Christo Scherer MM, Figueira MM, Schmitt EFP, de Almeida LC, Scherer R, Bogusz S, Fronza M. Fatty acid composition of vegetable oil blend and in vitro effects of pharmacotherapeutical skin care applications. ACTA ACUST UNITED AC 2019; 52:e8209. [PMID: 30785481 PMCID: PMC6376324 DOI: 10.1590/1414-431x20188209] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 12/06/2018] [Indexed: 01/25/2023]
Abstract
Vegetable oils have been used for a plethora of health benefits by their incorporation in foods, cosmetics, and pharmaceutical products, especially those intended for skin care. This study aimed to investigate the cutaneous benefits of a vegetable oil blend (VOB) formulation and its fatty acid composition. The anti-inflammatory activity was studied in macrophages of RAW 264.7 cells by investigating the release of nitric oxide (NO), superoxide anion generation (O2-), tumor necrosis factor-alpha (TNF-α), and interleukin 6 (IL-6). ABTS cation radical scavenging capacity assay, ferric reducing antioxidant potential (FRAP), 2,2-diphenyl-1-picrylhydrazyl (DPPH), and NO free radical scavenging assays were used to evaluate the antioxidant activity. VOB was tested for its ability to stimulate fibroblast proliferation and migration using the scratch assay, and antibacterial activity by the microdilution test. The fatty acid profile of a freshly prepared VOB formulation was determined by gas chromatography before and after accelerated stability testing. Chemical composition of VOB revealed the presence of oleic acid (C18:1n-9; 63.3%), linoleic acid (C18:2n-6; 4.7%), and linolenic acid (C18:3n-6; 5.1%) as major mono- and polyunsaturated fatty acids. No changes in the organoleptic characteristics and fatty acid composition were observed after the accelerated stability test. VOB 100 µg/mL reduced the healing time by increasing the total number of cells in the wounded area by 43.0±5.1% compared to the negative control group. VOB also suppressed the pro-inflammatory TNF-α and IL-6 cytokines, and NO and O2- production in lipopolysaccharide-stimulated macrophage cells. In conclusion, the VOB formulation contributed to the improvement of current therapeutic strategies for cutaneous applications in skin care.
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Affiliation(s)
- M Guidoni
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha, Vila Velha, ES, Brasil
| | - M M de Christo Scherer
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha, Vila Velha, ES, Brasil
| | - M M Figueira
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha, Vila Velha, ES, Brasil
| | - E F P Schmitt
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha, Vila Velha, ES, Brasil
| | - L C de Almeida
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brasil
| | - R Scherer
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha, Vila Velha, ES, Brasil
| | - S Bogusz
- Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brasil
| | - M Fronza
- Programa de Pós-Graduação em Ciências Farmacêuticas, Laboratório de Produtos Naturais, Universidade Vila Velha, Vila Velha, ES, Brasil
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17
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In Vitro Effectiveness of Microspheres Based on Silk Sericin and Chlorella vulgaris or Arthrospira platensis for Wound Healing Applications. MATERIALS 2017; 10:ma10090983. [PMID: 28832540 PMCID: PMC5615638 DOI: 10.3390/ma10090983] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2017] [Revised: 08/10/2017] [Accepted: 08/21/2017] [Indexed: 01/03/2023]
Abstract
Some natural compounds have recently been widely employed in wound healing applications due to their biological properties. One such compound is sericin, which is produced by Bombix mori, while active polyphenols, polysaccharides and proteins are synthetized by Chlorella vulgaris and Arthrospira platensis microalgae. Our hypothesis was that sericin, as an optimal bioactive polymeric carrier for microencapsulation process, could also improve the regenerative effect of the microalgae. A solvent-free extraction method and spray drying technique were combined to obtain five formulations, based on algal extracts (C. vulgaris and A. platensis, Chl and Art, respectively) or silk sericin (Ser) or their mixtures (Chl-Ser and Art-Ser). The spray drying was a suitable method to produce microspheres with similar dimensions, characterized by collapsed morphology with a rough surface. Art and Art-Ser showed higher antioxidant properties than other formulations. All microspheres resulted in cytocompatibility on fibroblasts until 1.25 mg/mL and promoted cell migration and the complete wound closure; this positive effect was further highlighted after treatment with Art and Art-Ser. To our surprize the combination of sericin to Art did not improve the microalgae extract efficacy, at least in our experimental conditions.
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18
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Kim TY, Jang IH, Han DY, Lee WG. Quantitative image analysis of the shape and size of circular wound sites generated by vertically stamped scratches. Micron 2017. [PMID: 28628808 DOI: 10.1016/j.micron.2017.06.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
A protocol for quantitative image analysis of wound generation is important to better understand the integrative process of wound healing and the closure mechanism. Here, we present a method for quantitative analysis of microscopic images of circular wound sites generated by vertically stamped scratches. To demonstrate proof-of-concept validation, we used two types of mechanical stamping tools, a mechanical pencil lead (type 1; brittle) and polydimethylsiloxane (PDMS) pillars (type 2; ductile), to create circular wound sites. We also present a method for analysis of microscopic images of the generated wound sites by suggesting new parameters, such as controlled area transfer ratio, modified shape factor, and roundness index, specifically to investigate the shape and size of wounds via house-coded image processing. We believe that this approach can be potentially useful by providing a better way of studying vertical wound generation for future skin wound generation and care applications compared with its counterpart, conventional horizontal wound generation.
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Affiliation(s)
- Tae Young Kim
- Department of Mechanical Engineering, Kyung Hee University, Yongin 17104, Republic of Korea
| | - In Hyuk Jang
- Department of Mechanical Engineering, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Dong Yeol Han
- Department of Mechanical Engineering, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Won Gu Lee
- Department of Mechanical Engineering, Kyung Hee University, Yongin 17104, Republic of Korea.
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