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Pandey S, Kannaujiya VK. Bacterial extracellular biopolymers: Eco-diversification, biosynthesis, technological development and commercial applications. Int J Biol Macromol 2024; 279:135261. [PMID: 39244116 DOI: 10.1016/j.ijbiomac.2024.135261] [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: 05/21/2024] [Revised: 08/22/2024] [Accepted: 08/31/2024] [Indexed: 09/09/2024]
Abstract
Synthetic polymers have been widely thriving as mega industries at a commercial scale in various commercial sectors over the last few decades. The extensive use of synthetic polymers has caused several negative repercussions on the health of humans and the environment. Recently, biopolymers have gained more attention among scientists of different disciplines by their potential therapeutic and commercial applications. Biopolymers are chain-like repeating units of molecules isolated from green sources. They are self-degradable, biocompatible, and non-toxic in nature. Recently, eco-friendly biopolymers such as extracellular polymeric substances (EPSs) have received much attention for their wide applications in the fields of emulsification, flocculation, preservatives, wastewater treatment, nanomaterial functionalization, drug delivery, cosmetics, glycomics, medicinal chemistry, and purification technology. The dynamicity of applications has raised the industrial and consumer demands to cater to the needs of mankind. This review deals with current insights and highlights on database surveys, potential sources, classification, extremophilic EPSs, bioprospecting, patents, microenvironment stability, biosynthesis, and genetic advances for production of high valued ecofriendly polymers. The importance of high valued EPSs in commercial and industrial applications in the global market economy is also summarized. This review concludes with future perspectives and commercial applications for the well-being of humanity.
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Affiliation(s)
- Saumi Pandey
- Department of Botany, MMV, Banaras Hindu University, Varanasi 221005, India
| | - Vinod K Kannaujiya
- Department of Botany, MMV, Banaras Hindu University, Varanasi 221005, India.
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2
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Wei M, Wang H, Wu J, Yang D, Li K, Liu X, Wang M, Lin B, Wang Z. Multihydrogen Bond Modulated Polyzwitterionic Removable Adhesive Hydrogel with Antibacterial and Hemostatic Function for Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2024; 16:21472-21485. [PMID: 38626344 DOI: 10.1021/acsami.3c19481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
Wound management is a major challenge worldwide, placing a huge financial burden on the government of every nation. Wound dressings that can protect wounds, accelerate healing, prevent infection, and avoid secondary damage continue to be a major focus of research in the health care and clinical communities. Herein, a novel zwitterionic polymer (LST) hydrogel incorporated with [2-(methacryloyloxy) ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide (SBMA), mussel-inspired N-[tris(hydroxymethyl)methyl] acrylamide (THMA), and lithium magnesium salt was prepared for functional wound dressings. The incorporation of the THMA monomer containing three hydroxyl groups gives the hydrogel suitable adhesion properties (∼6.0 KPa). This allows the LST zwitterionic hydrogels to bind well to the skin, which not only protects the wound and ensures its therapeutic efficacy but also allows for painless removal and reduced patient pain. Zwitterionic sulfobetaine units of SBMA provide antimicrobial and mechanical properties. The chemical structure and microscopic morphology of LST zwitterionic hydrogels were systematically studied, along with their swelling ratio, adhesion, and mechanical properties. The results showed that the LST zwitterionic hydrogels had a uniform and compact porous structure with the highest swelling and mechanical strain of 1607% and 1068.74%, respectively. The antibacterial rate of LST zwitterionic hydrogels was as high as 99.49%, and the hemostatic effect was about 1.5 times that of the commercial gelatin hemostatic sponges group. In further studies, a full-thickness mouse skin model was selected to evaluate the wound healing performance. Wounds covered by LST zwitterionic hydrogels had a complete epithelial reformation and new connective tissue, and its vascular regenerative capacity was increased to about 2.4 times that of the commercial group, and the wound could completely heal within 12-13 days. This study provides significant advances in the design and construction of multifunctional zwitterionic hydrogel adhesives and wound dressings.
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Affiliation(s)
- Meng Wei
- Shaanxi Key Laboratory of Chemical Additives for Industry, Xi'an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xuefu Road, Weiyang district, Xi'an 710021, China
| | - Haihua Wang
- Shaanxi Key Laboratory of Chemical Additives for Industry, Xi'an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xuefu Road, Weiyang district, Xi'an 710021, China
| | - Jingheng Wu
- Department of Orthopedics, Beijing Jishuitan Hospital, Beijing 100035, PR China
| | - Dong Yang
- Shaanxi Key Laboratory of Chemical Additives for Industry, Xi'an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xuefu Road, Weiyang district, Xi'an 710021, China
| | - Ke Li
- Xi'an Key Laboratory for Prevention and Treatment of Common Aging Diseases, Translational and Research Centre for Prevention and Therapy of Chronic Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an 710021, China
| | - Xuan Liu
- Shaanxi Key Laboratory of Chemical Additives for Industry, Xi'an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xuefu Road, Weiyang district, Xi'an 710021, China
| | - Mengxi Wang
- Shaanxi Key Laboratory of Chemical Additives for Industry, Xi'an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xuefu Road, Weiyang district, Xi'an 710021, China
| | - Bixia Lin
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Zhigao Wang
- School of Pharmacy, Xi'an Medical University, Xi'an 710021, China
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Liu Y, Teng J, Huang R, Zhao W, Yang D, Ma Y, Wei H, Chen H, Zhang J, Chen J. Injectable plant-derived polysaccharide hydrogels with intrinsic antioxidant bioactivity accelerate wound healing by promoting epithelialization and angiogenesis. Int J Biol Macromol 2024; 266:131170. [PMID: 38554906 DOI: 10.1016/j.ijbiomac.2024.131170] [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: 12/28/2023] [Revised: 02/21/2024] [Accepted: 03/25/2024] [Indexed: 04/02/2024]
Abstract
Skin wound healing is a complex and dynamic process involving hemostasis, inflammatory response, cell proliferation and migration, and angiogenesis. Currently used wound dressings remain unsatisfactory in the clinic due to the lack of adjustable mechanical property for injection operation and bioactivity for accelerating wound healing. In this work, an "all-sugar" hydrogel dressing is developed based on dynamic borate bonding network between the hydroxyl groups of okra polysaccharide (OP) and xyloglucan (XG). Benefiting from the reversible crosslinking network, the resulting composite XG/OP hydrogels exhibited good shear-thinning and fast self-healing properties, which is suitable to be injected at wound beds and filled into irregular injured site. Besides, the proposed XG/OP hydrogels showed efficient antioxidant capacity by scavenging DPPH activity of 73.9 %. In vivo experiments demonstrated that XG/OP hydrogels performed hemostasis and accelerated wound healing with reduced inflammation, enhanced collagen deposition and angiogenesis. This plant-derived dynamic hydrogel offers a facile and effective approach for wound management and has great potential for clinical translation in feature.
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Affiliation(s)
- Yu Liu
- College of Animal Science and Technology, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, Guangxi University, Nanning 530004, China; Institute of Medical Sciences, The Second Hospital and Shandong University Center for Orthopaedics, Cheeloo College of Medicine, Shandong University, Jinan 250033, China
| | - Jingmei Teng
- Cixi Biomedical Research Institute, Wenzhou Medical University, Cixi 315300, China; Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315300, China
| | - Rongjian Huang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315300, China
| | - Wei Zhao
- Cixi Biomedical Research Institute, Wenzhou Medical University, Cixi 315300, China; Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315300, China
| | - Dan Yang
- College of Animal Science and Technology, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, Guangxi University, Nanning 530004, China; Institute of Medical Sciences, The Second Hospital and Shandong University Center for Orthopaedics, Cheeloo College of Medicine, Shandong University, Jinan 250033, China
| | - Yuxi Ma
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315300, China
| | - Hua Wei
- Key Laboratory of Colloid and Interface Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, China.
| | - Hailan Chen
- College of Animal Science and Technology, Guangxi Key Laboratory of Animal Breeding, Disease Control and Prevention, Guangxi University, Nanning 530004, China.
| | - Jiantao Zhang
- Cixi Institute of Biomedical Engineering, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315300, China
| | - Jing Chen
- Institute of Medical Sciences, The Second Hospital and Shandong University Center for Orthopaedics, Cheeloo College of Medicine, Shandong University, Jinan 250033, China.
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Rodrigues T, Mota R, Gales L, Tamagnini P, Campo-Deaño L. Microrheological characterisation of Cyanoflan in human blood plasma. Carbohydr Polym 2024; 326:121575. [PMID: 38142107 DOI: 10.1016/j.carbpol.2023.121575] [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: 07/04/2023] [Revised: 10/23/2023] [Accepted: 11/07/2023] [Indexed: 12/25/2023]
Abstract
Naturally occurring polysaccharidic biopolymers released by marine cyanobacteria are of great interest for numerous biomedical applications, such as wound healing and drug delivery. Such polymers generally exhibit high molecular weight and an entangled structure that impact the rheology of biological fluids. However, biocompatibility tests focus not so much on rheological properties as on immune response. In the present study, the rheological behaviour of native blood plasma as a function of the concentration of a cyanobacterium biopolymer is investigated via multiple particle tracking microrheology, which measures the Brownian motion of probes embedded in a sample, and cryogenic scanning electron microscope microstructural characterisation. We use Cyanoflan as the biopolymer of choice, and profit from our knowledge of its chemical structure and its exciting potential for biotechnological applications. A sol-gel transition is identified using time-concentration superposition and the power-law behaviour of the incipient network's viscoelastic response is observed in a variety of microrheological data. Our results point to rheology-based principles for blood compatibility tests by facilitating the assignment of quantitative values to specific properties, as opposed to more heuristic approaches.
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Affiliation(s)
- T Rodrigues
- CEFT - Centro de Estudos de Fenómenos de Transporte, Depto. de Engenharia Mecânica, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; ALiCE - Laboratório Associado em Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal.
| | - R Mota
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal
| | - L Gales
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira, 228, 4050-313 Porto, Portugal
| | - P Tamagnini
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen, 208, 4200-135 Porto, Portugal; Depto. de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, Ed. FC4, 4169-007 Porto, Portugal
| | - L Campo-Deaño
- CEFT - Centro de Estudos de Fenómenos de Transporte, Depto. de Engenharia Mecânica, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; ALiCE - Laboratório Associado em Engenharia Química, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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5
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S H, Unni VV, Gayathri, B N, Chandran S, Sambhudevan S. Bio-based polymers containing traditional medicinal fillers for wound healing applications - An evaluation of neoteric development and future perspectives. Biotechnol J 2023; 18:e2300006. [PMID: 37170732 DOI: 10.1002/biot.202300006] [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: 01/04/2023] [Revised: 04/17/2023] [Accepted: 05/03/2023] [Indexed: 05/13/2023]
Abstract
In recent years, health-care providers have seen more patients with difficult-to-treat wounds and burns. The biopolymer-based wound dressing protects the wounded area while assisting in the recovery of dermal and epithelial tissues throughout the healing process. The overall number of patients with chronic lesions has been expanding due to developing society, over weight, and cardiovascular illness. For the treatment of chronic wounds, there is an increasing demand for the development of ideal wound dressing materials with excellent properties such as antibacterial activity, biocompatibility, free radical scavenging capacity, non-adherent property, hydrophilicity, and so on. Nevertheless, owing to the above mention properties, natural polymers are being used for several key functions of biomedicine like narcotic distribution systems, tissue manufacturing, bandages, and so on. Accordingly, the significance of these bio-based polymers interfered with healing functions that lead to informing and inspiring youth and scientist researchers worldwide to grab with these far-reaching areas of medicine and biology. The review highlights the physiochemical properties of natural polymers, the biological evaluation of various materials as wound dressings, their synthesis and mechanical properties, clinical status, challenges, and future perspectives.
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Affiliation(s)
- Hema S
- Department of Chemistry, Amrita Vishwa Vidyapeetham, Amritapuri, Kollam, Kerala, India
| | - Vaani V Unni
- Department of Chemistry, Amrita Vishwa Vidyapeetham, Amritapuri, Kollam, Kerala, India
| | - Gayathri
- Department of Chemistry, Amrita Vishwa Vidyapeetham, Amritapuri, Kollam, Kerala, India
| | - Niranjan B
- Department of Chemistry, Amrita Vishwa Vidyapeetham, Amritapuri, Kollam, Kerala, India
| | - Smitha Chandran
- Department of Chemistry, Amrita Vishwa Vidyapeetham, Amritapuri, Kollam, Kerala, India
| | - Sreedha Sambhudevan
- Department of Chemistry, Amrita Vishwa Vidyapeetham, Amritapuri, Kollam, Kerala, India
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6
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Mota R, Lima RT, Flores C, Silva JF, Cruz B, Alves B, Pinto MT, Adessi A, Pereira SB, De Philippis R, Soares P, Tamagnini P. Assessing the Antitumor Potential of Variants of the Extracellular Carbohydrate Polymer from Synechocystis Δ sigF Mutant. Polymers (Basel) 2023; 15:1382. [PMID: 36987163 PMCID: PMC10057057 DOI: 10.3390/polym15061382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 03/12/2023] Open
Abstract
Cancer is a leading cause of death worldwide with a huge societal and economic impact. Clinically effective and less expensive anticancer agents derived from natural sources can help to overcome limitations and negative side effects of chemotherapy and radiotherapy. Previously, we showed that the extracellular carbohydrate polymer of a Synechocystis ΔsigF overproducing mutant displayed a strong antitumor activity towards several human tumor cell lines, by inducing high levels of apoptosis through p53 and caspase-3 activation. Here, the ΔsigF polymer was manipulated to obtain variants that were tested in a human melanoma (Mewo) cell line. Our results demonstrated that high molecular mass fractions were important for the polymer bioactivity, and that the reduction of the peptide content generated a variant with enhanced in vitro antitumor activity. This variant, and the original ΔsigF polymer, were further tested in vivo using the chick chorioallantoic membrane (CAM) assay. Both polymers significantly decreased xenografted CAM tumor growth and affected tumor morphology, by promoting less compact tumors, validating their antitumor potential in vivo. This work contributes with strategies for the design and testing tailored cyanobacterial extracellular polymers and further strengths the relevance of evaluating this type of polymers for biotechnological/biomedical applications.
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Affiliation(s)
- Rita Mota
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
| | - Raquel T. Lima
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IPATIMUP - Institute of Molecular Pathology and Immunology of the University of Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
- FMUP - Department of Pathology, Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal
| | - Carlos Flores
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
- ICBAS - Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Juliana F. Silva
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
- FCUP - Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
| | - Beatriz Cruz
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
- FCUP - Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
| | - Bárbara Alves
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IPATIMUP - Institute of Molecular Pathology and Immunology of the University of Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
- School of Allied Health Sciences of Polytechnic Institute of Porto, Rua Dr. António Bernardino de Almeida 400, 4200-072 Porto, Portugal
| | - Marta T. Pinto
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IPATIMUP - Institute of Molecular Pathology and Immunology of the University of Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
| | - Alessandra Adessi
- DAGRI - Department of Agriculture, Food, Environment and Forestry, University of Florence, Via Maragliano 77, 50144 Firenze, Italy; (A.A.); (R.D.P.)
| | - Sara B. Pereira
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
| | - Roberto De Philippis
- DAGRI - Department of Agriculture, Food, Environment and Forestry, University of Florence, Via Maragliano 77, 50144 Firenze, Italy; (A.A.); (R.D.P.)
| | - Paula Soares
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IPATIMUP - Institute of Molecular Pathology and Immunology of the University of Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
- FMUP - Department of Pathology, Faculty of Medicine, University of Porto, Alameda Prof. Hernâni Monteiro, 4200-319 Porto, Portugal
| | - Paula Tamagnini
- i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal; (R.M.); (R.T.L.); (C.F.); (J.F.S.); (B.C.); (B.A.); (M.T.P.); (S.B.P.); (P.S.)
- IBMC - Instituto de Biologia Molecular e Celular, Universidade do Porto, Rua Alfredo Allen 208, 4200-135 Porto, Portugal
- FCUP - Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, Rua do Campo Alegre, s/n, 4169-007 Porto, Portugal
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7
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Biopolymers in diabetic wound care management: a potential substitute to traditional dressings. Eur Polym J 2023. [DOI: 10.1016/j.eurpolymj.2023.111979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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8
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Pilot scale production of Crocosphaera chwakensis CCY0110 and evaluation of its biomass nutritional potential. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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9
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Exploring Silk Sericin for Diabetic Wounds: An In Situ-Forming Hydrogel to Protect against Oxidative Stress and Improve Tissue Healing and Regeneration. Biomolecules 2022; 12:biom12060801. [PMID: 35740928 PMCID: PMC9221298 DOI: 10.3390/biom12060801] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/02/2022] [Accepted: 06/04/2022] [Indexed: 12/16/2022] Open
Abstract
Chronic wounds are one of the most frequent complications that are associated with diabetes mellitus. The overproduction of reactive oxygen species (ROS) is a key factor in the delayed healing of a chronic wound. In the present work, we develop a novel in situ-forming silk sericin-based hydrogel (SSH) that is produced by a simple methodology using horseradish peroxidase (HRP) crosslinking as an advanced dressing for wound healing. The antioxidant and angiogenic effects were assessed in vitro and in vivo after in situ application using an excisional wound-healing model in a genetically-induced diabetic db/db mice and though the chick embryo choriollantoic membrane (CAM) assay, respectively. Wounds in diabetic db/db mice that were treated with SSH closed with reduced granulation tissue, decreased wound edge distance, and wound thickness, when compared to Tegaderm, a dressing that is commonly used in the clinic. The hydrogel also promoted a deposition of collagen fibers with smaller diameter which may have had a boost effect in re-epithelialization. SSH treatment slightly induced two important endogenous antioxidant defenses, superoxide dismutase and catalase. A CAM assay made it possible to observe that SSH led to an increase in the number of newly formed vessels without inducing an inflammatory reaction. The present hydrogel may result in a multi-purpose technology with angiogenic, antioxidant, and anti-inflammatory properties, while advancing efficient and organized tissue regeneration.
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10
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Contributions of Women in Recent Research on Biopolymer Science. Polymers (Basel) 2022; 14:polym14071420. [PMID: 35406293 PMCID: PMC9003506 DOI: 10.3390/polym14071420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 03/26/2022] [Accepted: 03/28/2022] [Indexed: 11/26/2022] Open
Abstract
Nowadays, biopolymers are playing a fundamental role in our society because of the environmental issues and concerns associated with synthetic polymers. The aim of this Special Issue entitled ‘Women in Polymer Science and Technology: Biopolymers’ is highlighting the work designed and developed by women on biopolymer science and technology. In this context, this short review aims to provide an introduction to this Special Issue by highlighting some recent contributions of women around the world on the particular topic of biopolymer science and technology during the last 20 years. In the first place, it highlights a selection of important works performed on a number of well-studied natural polymers, namely, agar, chitin, chitosan, cellulose, and collagen. Secondly, it gives an insight into the discovery of new polysaccharides and enzymes that have a role in their synthesis and in their degradation. These contributions will be paving the way for the next generation of female and male scientists on this topic.
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11
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Santos M, Pacheco CC, Yao L, Hudson EP, Tamagnini P. CRISPRi as a Tool to Repress Multiple Copies of Extracellular Polymeric Substances (EPS)-Related Genes in the Cyanobacterium Synechocystis sp. PCC 6803. Life (Basel) 2021; 11:life11111198. [PMID: 34833074 PMCID: PMC8620461 DOI: 10.3390/life11111198] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 10/28/2021] [Accepted: 11/03/2021] [Indexed: 12/03/2022] Open
Abstract
The use of the versatile cyanobacterial extracellular polymeric substances (EPS) for biotechnological/biomedical applications implies an extensive knowledge of their biosynthetic pathways to improve/control polymer production yields and characteristics. The multiple copies of EPS-related genes, scattered throughout cyanobacterial genomes, adds another layer of complexity, making these studies challenging and time-consuming. Usually, this issue would be tackled by generating deletion mutants, a process that in cyanobacteria is also hindered by the polyploidy. Thus, the use of the CRISPRi multiplex system constitutes an efficient approach to addressing this redundancy. Here, three putative Synechocystis sp. PCC 6803 kpsM homologues (slr0977, slr2107, and sll0574) were repressed using this methodology. The characterization of the 3-sgRNA mutant in terms of fitness/growth and total carbohydrates, released and capsular polysaccharides, and its comparison with previously generated single knockout mutants pointed towards Slr0977 being the key KpsM player in Synechocystis EPS production. This work validates CRISPRi as a powerful tool to unravel cyanobacterial complex EPS biosynthetic pathways expediting this type of studies.
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Affiliation(s)
- Marina Santos
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4000-008 Porto, Portugal; (M.S.); (C.C.P.)
- IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, 4000-008 Porto, Portugal
- Programa Doutoral em Biologia Molecular e Celular (MCbiology), Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, 4000-008 Porto, Portugal
| | - Catarina C. Pacheco
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4000-008 Porto, Portugal; (M.S.); (C.C.P.)
- IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, 4000-008 Porto, Portugal
| | - Lun Yao
- Science for Life Laboratory, KTH Royal Institute of Technology, 10004 Stockholm, Sweden; (L.Y.); (E.P.H.)
- Department of Protein Science, KTH Royal Institute of Technology, 10004 Stockholm, Sweden
| | - Elton P. Hudson
- Science for Life Laboratory, KTH Royal Institute of Technology, 10004 Stockholm, Sweden; (L.Y.); (E.P.H.)
- Department of Protein Science, KTH Royal Institute of Technology, 10004 Stockholm, Sweden
| | - Paula Tamagnini
- i3S-Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4000-008 Porto, Portugal; (M.S.); (C.C.P.)
- IBMC-Instituto de Biologia Molecular e Celular, Universidade do Porto, 4000-008 Porto, Portugal
- Departamento de Biologia, Faculdade de Ciências, Universidade do Porto, 4000-008 Porto, Portugal
- Correspondence: ; Tel.: +351-226074957
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Miguel SP, Ribeiro MP, Otero A, Coutinho P. Application of microalgae and microalgal bioactive compounds in skin regeneration. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102395] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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