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Yadav JP. Based on Clinical Research Matrix Metalloprotease (MMP) Inhibitors to Promote Diabetic Wound Healing. Horm Metab Res 2023; 55:752-757. [PMID: 37798905 DOI: 10.1055/a-2171-5879] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
Chronic inflammation is a common factor in obesity, diabetes mellitus, and the complications of diabetes, including diabetic wounds. These ulcers are characterized by persistent lesions that are challenging to heal, significantly decreasing patients' quality of life and imposing a substantial financial burden on society. MMP are zinc endopeptidases that play a role in wound healing in response to various stimuli, including diabetes mellitus. MMP levels fluctuate throughout the wound healing process in diabetic patients' serum, skin tissues, and wound fluid, indicating their potential as biomarkers for diabetic foot ulcers. Targeting MMP has emerged as a promising strategy for treating diabetic wounds, as these enzymes are involved in critical biological processes related to wound healing, including extracellular matrix secretion, angiogenesis, granulation tissue formation, collagen growth, re-epithelization, inflammatory response, and oxidative stress.
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Affiliation(s)
- Jagat Pal Yadav
- Faculty of Pharmaceutical Sciences, Rama University, Kanpur, India
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2
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Fu K, Zheng X, Chen Y, Wu L, Yang Z, Chen X, Song W. Role of matrix metalloproteinases in diabetic foot ulcers: Potential therapeutic targets. Front Pharmacol 2022; 13:1050630. [PMID: 36339630 PMCID: PMC9631429 DOI: 10.3389/fphar.2022.1050630] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 10/07/2022] [Indexed: 11/27/2022] Open
Abstract
Diabetic foot ulcers (DFUs) are pathological states of tissue destruction of the foot or lower extremity in diabetic patients and are one of the serious chronic complications of diabetes mellitus. Matrix metalloproteinases (MMPs) serve crucial roles in both pathogenesis and wound healing. The primary functions of MMPs are degradation, which involves removing the disrupted extracellular matrix (ECM) during the inflammatory phase, facilitating angiogenesis and cell migration during the proliferation phase, and contracting and rebuilding the tissue during the remodeling phase. Overexpression of MMPs is a feature of DFUs. The upregulated MMPs in DFUs can cause excessive tissue degradation and impaired wound healing. Regulation of MMP levels in wounds could promote wound healing in DFUs. In this review, we talk about the roles of MMPs in DFUs and list potential methods to prevent MMPs from behaving in a manner detrimental to wound healing in DFUs.
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Affiliation(s)
- Kang Fu
- School of Life Sciences, Hubei University, Wuhan, China
| | - Xueyao Zheng
- School of Life Sciences, Hubei University, Wuhan, China
| | - Yuhan Chen
- School of Life Sciences, Hubei University, Wuhan, China
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China
| | - Liuying Wu
- School of Life Sciences, Hubei University, Wuhan, China
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China
| | - Zhiming Yang
- School of Life Sciences, Hubei University, Wuhan, China
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China
| | - Xu Chen
- School of Life Sciences, Hubei University, Wuhan, China
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China
| | - Wei Song
- School of Life Sciences, Hubei University, Wuhan, China
- National & Local Joint Engineering Research Center of High-throughput Drug Screening Technology, State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan, China
- *Correspondence: Wei Song,
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3
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Harvey J, Mellody KT, Cullum N, Watson REB, Dumville J. Wound fluid sampling methods for proteomic studies: A scoping review. Wound Repair Regen 2022; 30:317-333. [PMID: 35381119 PMCID: PMC9322564 DOI: 10.1111/wrr.13009] [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: 08/04/2021] [Revised: 02/01/2022] [Accepted: 03/08/2022] [Indexed: 01/02/2023]
Abstract
Understanding why some wounds are hard to heal is important for improving care and developing more effective treatments. The method of sample collection used is an integral step in the research process and thus may affect the results obtained. The primary objective of this study was to summarise and map the methods currently used to sample wound fluid for protein profiling and analysis. Eligible studies were those that used a sampling method to collect wound fluid from any human wound for analysis of proteins. A search for eligible studies was performed using MEDLINE, Embase and CINAHL Plus in May 2020. All references were screened for eligibility by one reviewer, followed by discussion and consensus with a second reviewer. Quantitative data were mapped and visualised using appropriate software and summarised via a narrative summary. After screening, 280 studies were included in this review. The most commonly used group of wound fluid collection methods were vacuum, drainage or use of other external devices, with surgical wounds being the most common sample source. Other frequently used collection methods were extraction from absorbent materials, collection beneath an occlusive dressing and direct collection of wound fluid. This scoping review highlights the variety of methods used for wound fluid collection. Many studies had small sample sizes and short sample collection periods; these weaknesses have hampered the discovery and validation of novel biomarkers. Future research should aim to assess the reproducibility and feasibility of sampling and analytical methods for use in larger longitudinal studies.
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Affiliation(s)
- Joe Harvey
- Centre for Dermatology Research, School of Biological Sciences, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Kieran T Mellody
- Centre for Dermatology Research, School of Biological Sciences, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, UK
| | - Nicky Cullum
- NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,Division of Nursing, Midwifery & Social Work, School of Health Sciences, The University of Manchester, Manchester, UK
| | - Rachel E B Watson
- Centre for Dermatology Research, School of Biological Sciences, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, UK.,NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,Manchester Institute for Collaborative Research on Ageing, The University of Manchester, Manchester, UK
| | - Jo Dumville
- NIHR Manchester Biomedical Research Centre, Manchester University NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK.,Division of Nursing, Midwifery & Social Work, School of Health Sciences, The University of Manchester, Manchester, UK
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4
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Alamgir M, Nayak GC, Mallick A, Sahoo S. Effects of TiO2 and GO nanoparticles on the thermomechanical properties of bioactive poly-HEMA nanocomposites. IRANIAN POLYMER JOURNAL 2021. [DOI: 10.1007/s13726-021-00948-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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5
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Abstract
Enzymes are a class of protein that catalyze a wide range of chemical reactions, including the cleavage of specific peptide bonds. They are expressed in all cell types, play vital roles in tissue development and homeostasis, and in many diseases, such as cancer. Enzymatic activity is tightly controlled through the use of inactive pro-enzymes, endogenous inhibitors and spatial localization. Since the presence of specific enzymes is often correlated with biological processes, and these proteins can directly modify biomolecules, they are an ideal biological input for cell-responsive biomaterials. These materials include both natural and synthetic polymers, cross-linked hydrogels and self-assembled peptide nanostructures. Within these systems enzymatic activity has been used to induce biodegradation, release therapeutic agents and for disease diagnosis. As technological advancements increase our ability to quantify the expression and nanoscale organization of proteins in cells and tissues, as well as the synthesis of increasingly complex and well-defined biomaterials, enzyme-responsive biomaterials are poised to play vital roles in the future of biomedicine.
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Affiliation(s)
- E. Thomas Pashuck
- Department of Bioengineering, P.C. Rossin College of Engineering and Applied Science, Lehigh University Bethlehem Pennsylvania USA
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6
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Almoshari Y, Ren R, Zhang H, Jia Z, Wei X, Chen N, Li G, Ryu S, Lele SM, Reinhardt RA, Wang D. GSK3 inhibitor-loaded osteotropic Pluronic hydrogel effectively mitigates periodontal tissue damage associated with experimental periodontitis. Biomaterials 2020; 261:120293. [PMID: 32877763 DOI: 10.1016/j.biomaterials.2020.120293] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 06/16/2020] [Accepted: 08/01/2020] [Indexed: 02/06/2023]
Abstract
Periodontitis is a chronic inflammatory disease caused by complex interactions between the host immune system and pathogens that affect the integrity of periodontium. To prevent disease progression and thus preserve alveolar bone structure, simultaneous anti-inflammatory and osteogenic intervention are essential. Hence, a glycogen synthase kinase 3 beta inhibitor (BIO) was selected as a potent inflammation modulator and osteogenic agent to achieve this treatment objective. BIO's lack of osteotropicity, poor water solubility, and potential long-term systemic side effects, however, have hampered its clinical applications. To address these limitations, pyrophosphorylated Pluronic F127 (F127-PPi) was synthesized and mixed with regular F127 to prepare an injectable and thermoresponsive hydrogel formulation (PF127) of BIO, which could adhere to hard tissue and gradually release BIO to exert its therapeutic effects locally. Comparing to F127 hydrogel, PF127 hydrogels exhibited stronger binding to hydroxyapatite (HA). Additionally, BIO's solubility in PF127 solution was dramatically improved over F127 solution and the improvement was proportional to the polymer concentration. When evaluated on a rat model of periodontitis, PF127-BIO hydrogel treatment was found to be very effective in preserving alveolar bone and ligament, and preventing periodontal inflammation, as shown by the micro-CT and histological data, respectively. Altogether, these findings suggested that the thermoresponsive PF127 hydrogel is an effective local drug delivery system for better clinical management of periodontitis and associated pathologies.
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Affiliation(s)
- Yosif Almoshari
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, 68198, USA; Department of Pharmaceutics, College of Pharmacy, Jazan University, Jazan, 45142, Saudi Arabia
| | - Rongguo Ren
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Haipeng Zhang
- Department of Mechanical and Materials Engineering, College of Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA
| | - Zhenshan Jia
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Xin Wei
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Ningrong Chen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Guojuan Li
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Sangjin Ryu
- Department of Mechanical and Materials Engineering, College of Engineering, University of Nebraska-Lincoln, Lincoln, NE, 68588, USA; Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, NE, 68588, USA
| | - Subodh M Lele
- Department of Pathology & Microbiology, College of Medicine, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Richard A Reinhardt
- Department of Surgical Specialties, College of Dentistry, University of Nebraska Medical Center, Lincoln, NE, 68583, USA
| | - Dong Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE, 68198, USA.
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Jones JI, Nguyen TT, Peng Z, Chang M. Targeting MMP-9 in Diabetic Foot Ulcers. Pharmaceuticals (Basel) 2019; 12:E79. [PMID: 31121851 PMCID: PMC6630664 DOI: 10.3390/ph12020079] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 05/15/2019] [Accepted: 05/18/2019] [Indexed: 12/15/2022] Open
Abstract
Diabetic foot ulcers (DFUs) are significant complications of diabetes and an unmet medical need. Matrix metalloproteinases (MMPs) play important roles in the pathology of wounds and in the wound healing process. However, because of the challenge in distinguishing active MMPs from the two catalytically inactive forms of MMPs and the clinical failure of broad-spectrum MMP inhibitors in cancer, MMPs have not been a target for treatment of DFUs until recently. This review covers the discovery of active MMP-9 as the biochemical culprit in the recalcitrance of diabetic wounds to healing and targeting this proteinase as a novel approach for the treatment of DFUs. Active MMP-8 and MMP-9 were observed in mouse and human diabetic wounds using a batimastat affinity resin and proteomics. MMP-9 was shown to play a detrimental role in diabetic wound healing, whereas MMP-8 was beneficial. A new class of selective MMP-9 inhibitors shows clinical promise for the treatment of DFUs.
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Affiliation(s)
- Jeffrey I Jones
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Trung T Nguyen
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Zhihong Peng
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
| | - Mayland Chang
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, USA.
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8
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Mandla S, Davenport Huyer L, Radisic M. Review: Multimodal bioactive material approaches for wound healing. APL Bioeng 2018; 2:021503. [PMID: 31069297 PMCID: PMC6481710 DOI: 10.1063/1.5026773] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 05/28/2018] [Indexed: 01/13/2023] Open
Abstract
Wound healing is a highly complex process of tissue repair that relies on the synergistic effect of a number of different cells, cytokines, enzymes, and growth factors. A deregulation in this process can lead to the formation of a non-healing chronic ulcer. Current treatment options, such as collagen wound dressings, are unable to meet the demand set by the wound environment. Therefore, a multifaceted bioactive dressing is needed to elicit a targeted affect. Wound healing strategies seek to develop a targeted effect through the delivery of a bioactive molecule to the wound by a hydrogel or a polymeric scaffold. This review examines current biomaterial and small molecule-based approaches that seek to develop a bioactive material for targeted wound therapy and accepted wound healing models for testing material efficacy.
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Affiliation(s)
- Serena Mandla
- Institute of Biomaterials and Biomedical Engineering, University of Toronto, Toronto, Ontario M5S 3G9, Canada
| | | | - Milica Radisic
- Author to whom correspondence should be addressed: . Tel.: +1-416-946-5295. Fax: +1-416-978-4317
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9
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Jiang S, Liu H, Zhang X, Ren Y, Cui X, Song X. Synthesis of PCL-branched P(MMA-co
-HEMA) to toughen electrospun PLLA fiber membrane. POLYM ADVAN TECHNOL 2017. [DOI: 10.1002/pat.4133] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | | | - Xue Zhang
- School of Chemical Engineering; Changchun University of Technology; Changchun 130012 PR China
| | - Yajun Ren
- School of Chemical Engineering; Changchun University of Technology; Changchun 130012 PR China
| | - Xinxiang Cui
- School of Chemical Engineering; Changchun University of Technology; Changchun 130012 PR China
| | - Xiaofeng Song
- School of Chemical Engineering; Changchun University of Technology; Changchun 130012 PR China
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10
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McDaniel JC, Szalacha L, Sales M, Roy S, Chafee S, Parinandi N. EPA + DHA supplementation reduces PMN activation in microenvironment of chronic venous leg ulcers: A randomized, double-blind, controlled study. Wound Repair Regen 2017; 25:680-690. [DOI: 10.1111/wrr.12558] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Accepted: 07/03/2017] [Indexed: 12/12/2022]
Affiliation(s)
| | - Laura Szalacha
- College of Nursing, University of Arizona; Tucson Arizona
| | - Michelle Sales
- College of Nursing, The Ohio State University; Columbus Ohio
| | - Sashwati Roy
- College of Medicine; The Ohio State University; Columbus Ohio
- Davis Heart and Lung Research Institute; The Ohio State University; Columbus Ohio
| | - Scott Chafee
- College of Medicine; The Ohio State University; Columbus Ohio
- Davis Heart and Lung Research Institute; The Ohio State University; Columbus Ohio
| | - Narasimham Parinandi
- College of Medicine; The Ohio State University; Columbus Ohio
- Davis Heart and Lung Research Institute; The Ohio State University; Columbus Ohio
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11
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Sutcliffe JES, Thrasivoulou C, Serena TE, Madden L, Richards T, Phillips ARJ, Becker DL. Changes in the extracellular matrix surrounding human chronic wounds revealed by 2-photon imaging. Int Wound J 2017; 14:1225-1236. [PMID: 28730726 DOI: 10.1111/iwj.12789] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2017] [Accepted: 06/07/2017] [Indexed: 01/08/2023] Open
Abstract
Chronic wounds are a growing problem worldwide with no effective therapeutic treatments available. Our objective was to understand the composition of the dermal tissue surrounding venous leg ulcers and diabetic foot ulcers (DFU). We used novel 2-photon imaging techniques alongside classical histology to examine biopsies from the edges of two common types of chronic wound, venous leg ulcers and DFU. Compared to normal intact skin, we found that collagen levels are significantly reduced throughout the dermis of venous leg ulcer biopsies and DFU, with a reduction in both fibril thickness and abundance. Both wound types showed a significant reduction in elastin in the upper dermis, but in DFU, the loss was throughout the dermis. Loss of extracellular matrix correlated with high levels of CD68- and CD18-positive leukocytes. 2-photon imaging of the extracellular matrix in the intact tissue surrounding a chronic wound with a hand-held device may provide a useful clinical indicator on the healing progression or deterioration of these wounds.
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Affiliation(s)
| | | | - Thomas E Serena
- SerenaGroup, Wound and Hyperbaric Centers, Cambridge, MA, USA
| | - Leigh Madden
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | - Toby Richards
- Department of Surgery, University College London, London, UK
| | | | - David L Becker
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore.,Institute of Medical Biology, A*Star, Immunos, Singapore
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12
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A Pilot Randomized, Controlled Study of Nanocrystalline Silver, Manuka Honey, and Conventional Dressing in Healing Diabetic Foot Ulcer. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 2017:5294890. [PMID: 28239398 PMCID: PMC5296609 DOI: 10.1155/2017/5294890] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2016] [Revised: 12/03/2016] [Accepted: 12/13/2016] [Indexed: 01/10/2023]
Abstract
Nanocrystalline silver (nAg) and Manuka honey (MH) dressing have increasing popularity for treating diabetic foot ulcer (DFU). This study was an open-label randomized controlled trial with three parallel groups' design in examining the preliminary effectiveness of nAg against MH and conventional dressing in healing DFU in terms of ulcer healing, ulcer infection, and inflammation. 31 participants (11 in the nAg group, 10 in the MH group, and 10 in the convention group) diagnosed with type 2 diabetes were enrolled. Wound cleaning, debridement, and topical dressing application were performed according to the group allocation in each visit at weeks 1, 2, 3, 4, 6, 8, 10, and 12. The results found that the proportions of complete ulcer healing were 81.8%, 50%, and 40% in the nAg, MH, and conventional groups, respectively. The ulcer size reduction rate was potentially higher in the nAg group (97.45%) than the MH group (86.21%) and the conventional group (75.17%). In bacteriology, nAg showed a greater rate of microorganism reduction although it was not significant. To conclude, nAg alginate was potentially superior to MH and conventional dressing in healing diabetic foot ulcer in terms of ulcer size reduction rate.
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13
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Tronci G, Yin J, Holmes RA, Liang H, Russell SJ, Wood DJ. Protease-sensitive atelocollagen hydrogels promote healing in a diabetic wound model. J Mater Chem B 2016; 4:7249-7258. [PMID: 32263727 DOI: 10.1039/c6tb02268e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The design of exudate-managing wound dressings is an established route to accelerated healing, although such design remains a challenge from material and manufacturing standpoints. Aiming towards the clinical translation of knowledge gained in vitro with highly-swollen rat tail collagen hydrogels, this study investigated the healing capability in a diabetic mouse wound model of telopeptide-free, protease-inhibiting collagen networks. 4-Vinylbenzylation and UV irradiation of type I atelocollagen (AC) led to hydrogel networks with chemical and macroscopic properties comparable to previous collagen analogues, attributable to similar lysine content and dichroic properties. After 4 days in vitro, hydrogels induced nearly 50 RFU% reduction in matrix metalloproteinase (MMP)-9 activity, whilst showing less than 20 wt% mass loss. After 20 days in vivo, dry networks promoted 99% closure of 10 × 10 mm full thickness wounds and accelerated neo-dermal tissue formation compared to Mepilex®. This collagen system can be equipped with multiple, customisable properties and functions key to personalised chronic wound care.
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Affiliation(s)
- Giuseppe Tronci
- Nonwovens Research Group, School of Design, University of Leeds, Leeds, UK
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14
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Ossipov DA. Bisphosphonate-modified biomaterials for drug delivery and bone tissue engineering. Expert Opin Drug Deliv 2015; 12:1443-58. [PMID: 25739860 DOI: 10.1517/17425247.2015.1021679] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
INTRODUCTION Bisphosphonates (BPs) were introduced 45 years ago as anti-osteoporotic drugs and during the last decade have been utilized as bone-targeting groups in systemic treatment of bone diseases. Very recently, strategies of chemical immobilization of BPs in hydrogels and nanocomposites for bone tissue engineering emerged. These strategies opened new applications of BPs in bone tissue engineering. AREAS COVERED Conjugates of BPs to different drug molecules, imaging agents, proteins and polymers are discussed in terms of specific targeting to bone and therapeutic affect induced by the resulting prodrugs in comparison with the parent drugs. Conversion of these conjugates into hydrogel scaffolds is also presented along with the application of the resulting materials for bone tissue engineering. EXPERT OPINION Calcium-binding properties of BPs can be successfully extended via different conjugation strategies not only for purposes of bone targeting, but also in supramolecular assembly affording either new nanocarriers or bulk nanocomposite scaffolds. Interaction between carrier-linked BPs and drug molecules should also be considered for the control of release of these molecules and their optimized delivery. Bone-targeting properties of BP-functionalized nanomaterials should correspond to bone adhesive properties of their bulk analogs.
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Affiliation(s)
- Dmitri A Ossipov
- Uppsala University, Division of Polymer Chemistry, Department of Chemistry-Ångström, Science for Life Laboratory , Uppsala, SE 751 21 , Sweden +46 18 417 7335 ;
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15
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Li Z, Yuan B, Dong X, Duan L, Tian H, He C, Chen X. Injectable polysaccharide hybrid hydrogels as scaffolds for burn wound healing. RSC Adv 2015. [DOI: 10.1039/c5ra16912g] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study, the polysaccharide-based hydrogels were prepared by Schiff base reaction. Then, the hydrogels were applied to a burn wound model of rats, following by skin regeneration.
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Affiliation(s)
- Ziyi Li
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
- Key Laboratory of Polymer Ecomaterials
| | - Baoming Yuan
- Department of Orthopaedics
- The Second Hospital of Jilin University
- Changchun 130041
- P. R. China
| | - Xiaoming Dong
- Department of Orthopaedics
- The Second Hospital of Jilin University
- Changchun 130041
- P. R. China
| | - Lijie Duan
- School of Chemistry and Life Science
- Changchun University of Technology
- Changchun 130012
- P. R. China
| | - Huayu Tian
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Chaoliang He
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
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16
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Expression and vitamin D-mediated regulation of matrix metalloproteinases (MMPs) and tissue inhibitors of metalloproteinases (TIMPs) in healthy skin and in diabetic foot ulcers. Arch Dermatol Res 2014; 306:809-21. [DOI: 10.1007/s00403-014-1494-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 06/12/2014] [Accepted: 08/20/2014] [Indexed: 01/13/2023]
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17
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Mayet N, Choonara YE, Kumar P, Tomar LK, Tyagi C, Du Toit LC, Pillay V. A comprehensive review of advanced biopolymeric wound healing systems. J Pharm Sci 2014; 103:2211-30. [PMID: 24985412 DOI: 10.1002/jps.24068] [Citation(s) in RCA: 148] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 05/28/2014] [Accepted: 05/29/2014] [Indexed: 11/12/2022]
Abstract
Wound healing is a complex and dynamic process that involves the mediation of many initiators effective during the healing process such as cytokines, macrophages and fibroblasts. In addition, the defence mechanism of the body undergoes a step-by-step but continuous process known as the wound healing cascade to ensure optimal healing. Thus, when designing a wound healing system or dressing, it is pivotal that key factors such as optimal gaseous exchange, a moist wound environment, prevention of microbial activity and absorption of exudates are considered. A variety of wound dressings are available, however, not all meet the specific requirements of an ideal wound healing system to consider every aspect within the wound healing cascade. Recent research has focussed on the development of smart polymeric materials. Combining biopolymers that are crucial for wound healing may provide opportunities to synthesise matrices that are inductive to cells and that stimulate and trigger target cell responses crucial to the wound healing process. This review therefore outlines the processes involved in skin regeneration, optimal management and care required for wound treatment. It also assimilates, explores and discusses wound healing drug-delivery systems and nanotechnologies utilised for enhanced wound healing applications.
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Affiliation(s)
- Naeema Mayet
- Wits Advanced Drug Delivery Platform Research Unit, Department of Pharmacy and Pharmacology, School of Therapeutic Sciences, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, Parktown, 2193, South Africa
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18
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Santander-Borrego M, Green DW, Chirila TV, Whittaker AK, Blakey I. Click functionalization of methacrylate-based hydrogels and their cellular response. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/pola.27183] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Miriem Santander-Borrego
- The University of Queensland, Australian Institute for the Bioengineering and Nanotechnology; St Lucia Queensland 4072 Australia
| | - David W. Green
- The Queensland Eye Institute; 140 Melbourne Street, South Brisbane Queensland 4101 Australia
| | - Traian V. Chirila
- The University of Queensland, Australian Institute for the Bioengineering and Nanotechnology; St Lucia Queensland 4072 Australia
- The Queensland Eye Institute; 140 Melbourne Street, South Brisbane Queensland 4101 Australia
- The University of Queensland, School of Medicine; Herston Road Herston Queensland 4029 Australia
- Queensland University of Technology; Faculty of Science and Engineering; 2 George Street Brisbane Queensland 4001 Australia
- University of Western Australia; Faculty of Science; Crawley Western Australia 6009 Australia
| | - Andrew K. Whittaker
- The University of Queensland, Australian Institute for the Bioengineering and Nanotechnology; St Lucia Queensland 4072 Australia
- The Queensland Eye Institute; 140 Melbourne Street, South Brisbane Queensland 4101 Australia
- The University of Queensland; Centre for Advancing Imaging, St Lucia Queensland 4072 Australia
| | - Idriss Blakey
- The University of Queensland, Australian Institute for the Bioengineering and Nanotechnology; St Lucia Queensland 4072 Australia
- The University of Queensland; Centre for Advancing Imaging, St Lucia Queensland 4072 Australia
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19
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Mathes SH, Ruffner H, Graf-Hausner U. The use of skin models in drug development. Adv Drug Deliv Rev 2014; 69-70:81-102. [PMID: 24378581 DOI: 10.1016/j.addr.2013.12.006] [Citation(s) in RCA: 185] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Revised: 12/10/2013] [Accepted: 12/17/2013] [Indexed: 12/12/2022]
Abstract
Three dimensional (3D) tissue models of the human skin are probably the most developed and understood in vitro engineered constructs. The motivation to accomplish organotypic structures was driven by the clinics to enable transplantation of in vitro grown tissue substitutes and by the cosmetics industry as alternative test substrates in order to replace animal models. Today a huge variety of 3D human skin models exist, covering a multitude of scientific and/or technical demands. This review summarizes and discusses different approaches of skin model development and sets them into the context of drug development. Although human skin models have become indispensable for the cosmetics industry, they have not yet started their triumphal procession in pharmaceutical research and development. For drug development these tissue models may be of particular interest for a) systemically acting drugs applied on the skin, and b) drugs acting at the site of application in the case of skin diseases or disorders. Although quite a broad spectrum of models covering different aspects of the skin as a biologically acting surface exists, these are most often single stand-alone approaches. In order to enable the comprehensive application into drug development processes, the approaches have to be synchronized to allow a cross-over comparison. Besides the development of biological relevant models, other issues are not less important in the context of drug development: standardized production procedures, process automation, establishment of significant analytical methods, and data correlation. For the successful routine use of engineered human skin models in drug development, major requirements were defined. If these requirements can be accomplished in the next few years, human organotypic skin models will become indispensable for drug development, too.
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Affiliation(s)
- Stephanie H Mathes
- Institute of Chemistry and Biological Chemistry, Zurich University of Applied Sciences (ZHAW), Einsiedlerstrasse 31, 8820 Waedenswil, Switzerland
| | - Heinz Ruffner
- Developmental and Molecular Pathways (DMP), Novartis Institutes for BioMedical Research (NIBR), Fabrikstrasse 22, 4056 Basel, Switzerland
| | - Ursula Graf-Hausner
- Institute of Chemistry and Biological Chemistry, Zurich University of Applied Sciences (ZHAW), Einsiedlerstrasse 31, 8820 Waedenswil, Switzerland.
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20
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Krisp C, Jacobsen F, McKay MJ, Molloy MP, Steinstraesser L, Wolters DA. Proteome analysis reveals antiangiogenic environments in chronic wounds of diabetes mellitus type 2 patients. Proteomics 2013; 13:2670-81. [PMID: 23798543 DOI: 10.1002/pmic.201200502] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 06/03/2013] [Accepted: 06/04/2013] [Indexed: 12/24/2022]
Abstract
In contrast to normal healing wounds, chronic wounds commonly show disturbances in proteins regulating wound healing processes, particularly those involved in cell proliferation and protein degradation. Multidimensional protein identification technology MS/MS was conducted to investigate and compare the protein composition of chronic diabetic foot exudates to exudates from split-skin donor sites of burn victims otherwise healthy. Spectral counting revealed 188 proteins differentially expressed (more than twofold and p-value <0.05) in chronic wounds. Most were involved in biological processes including inflammation, angiogenesis, and cell mortality. Increased expression of the inflammatory response stimulating S100 proteins, predominantly S100A8 and S100A9 (almost tenfold), was identified. Matrix metalloproteinases (MMPs) MMP1, MMP2, and MMP8 were identified to be elevated in chronic wounds with significant impact on collagen degradation and tissue destruction. Further, proteins with antiangiogenic properties were found at higher expression levels in chronic wounds. Reduced angiogenesis leads to drastic shortage in nutrition supply and causes increased cell death, demonstrated by Annexin A5 exclusively found in chronic wound exudates. However, excessive nucleic and cytosolic material infers cell death occurring not only by apoptosis but also by necrosis. In conclusion, mass spectrometric investigation of exudates from chronic wounds demonstrated dramatic impairment in wound repair with excessive inflammation, antiangiogenic environment, and accelerated cell death.
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Affiliation(s)
- Christoph Krisp
- Department of Analytical Chemistry, Biomolecular Mass Spectrometry, Ruhr-University Bochum, Bochum, Germany; Department of Chemistry and Biomolecular Sciences, Macquarie University, Sydney, Australia
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21
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Edwards JV, Caston-Pierre S. Citrate-linked keto- and aldo-hexose monosaccharide cellulose conjugates demonstrate selective human neutrophil elastase-lowering activity in cotton dressings. J Funct Biomater 2013; 4:59-73. [PMID: 24955952 PMCID: PMC4030900 DOI: 10.3390/jfb4020059] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2013] [Revised: 04/12/2013] [Accepted: 04/17/2013] [Indexed: 01/29/2023] Open
Abstract
Sequestration of harmful proteases as human neutrophil elastase (HNE) from the chronic wound environment is an important goal of wound dressing design and function. Monosaccharides attached to cellulose conjugates as ester-appended aldohexoses and ketohexoses were prepared on cotton gauze as monosccharide-citrate-cellulose-esters for HNE sequestration. The monosaccharide-cellulose analogs demonstrated selective binding when the derivatized cotton dressings were measured for sequestration of HNE. Each monosaccharide-cellulose conjugate was prepared as a cellulose citrate-linked monosaccharide ester on the cotton wound dressing, and assayed under wound exudate-mimicked conditions for elastase sequestration activity. A series of three aldohexose and four ketohexose ester cellulose conjugates were prepared on cotton gauze through citric acid-cellulose cross linking esterification. The monosaccharide portion of the conjugate was characterized by hydrolysis of the citrate-monosaccharide ester bond, and subsequent analysis of the free monosaccharide with high performance anion exchange chromatography. The ketohexose and aldohexose conjugate levels on cotton were quantified on cotton using chromatography and found to be present in milligram/gram amounts. The citrate-cellulose ester bonds were characterized with FTIR. Ketohexose-citrate-cellulose conjugates sequestered more elastase activity than aldohexose-citrate-cellulose conjugates. The monosaccharide cellulose conjugate families each gave distinctive profiles in elastase-lowering effects. Possible mechanisms of elastase binding to the monosaccharide-cellulose conjugates are discussed.
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Affiliation(s)
- Judson V Edwards
- USDA-ARS, Southern Regional Research Center, 1100 Robert E. Lee Blvd., New Orleans, LA 70124, USA.
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22
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Sensors and imaging for wound healing: A review. Biosens Bioelectron 2013; 41:30-42. [DOI: 10.1016/j.bios.2012.09.029] [Citation(s) in RCA: 287] [Impact Index Per Article: 26.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 09/06/2012] [Accepted: 09/20/2012] [Indexed: 01/13/2023]
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23
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McGovern J, Heinemann J, Burke L, Dawson R, Parker T, Upton Z, Hooper J, Manton K. Stratum basale keratinocyte expression of the cell-surface glycoprotein CDCP1 during epidermogenesis and its role in keratinocyte migration. Br J Dermatol 2013; 168:496-503. [DOI: 10.1111/bjd.12119] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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24
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Biomedical applications of bisphosphonates. J Control Release 2013; 167:175-88. [PMID: 23395668 DOI: 10.1016/j.jconrel.2013.01.032] [Citation(s) in RCA: 114] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Revised: 12/24/2012] [Accepted: 01/30/2013] [Indexed: 02/08/2023]
Abstract
Since their discovery over 100 years ago, bisphosphonates have been used industrially as corrosion inhibitors and complexing agents. With the discovery of their pharmacological activity in the late 1960s, implicating their high affinity for hydroxyapatite, bisphosphonates have been employed in the treatment of bone diseases and as targeting agents for colloids and drugs. They have notably been investigated for the treatment of Paget's disease, osteoporosis, bone metastases, malignancy-associated hypercalcemia, and pediatric bone diseases. Currently, they are first-line medications for several of these diseases and are taken by millions of patients worldwide, mostly postmenopausal women. A major problem associated with their use is their low oral bioavailability. Several delivery systems have been proposed to improve their absorption and to direct them to sites other than bone tissues. Beyond their important pharmacological role, the medical applications of bisphosphonates are numerous. In addition, their metal-chelating properties have been exploited to coat and stabilize implants, nanoparticulates, and contrast agents. In this contribution, we review the pharmacological and clinical uses of bisphosphonates and highlight their novel applications in the pharmaceutical and biomedical fields.
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25
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Alanne AL, Lahtinen M, Löfman M, Turhanen P, Kolehmainen E, Vepsäläinen J, Sievänen E. First bisphosphonate hydrogelators: potential composers of biocompatible gels. J Mater Chem B 2013; 1:6201-6212. [DOI: 10.1039/c3tb20957a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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26
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Chang J, Liu W, Han B, Peng S, He B, Gu Z. Investigation of the skin repair and healing mechanism of N-carboxymethyl chitosan in second-degree burn wounds. Wound Repair Regen 2012; 21:113-21. [DOI: 10.1111/j.1524-475x.2012.00859.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Accepted: 08/13/2012] [Indexed: 01/12/2023]
Affiliation(s)
- Jing Chang
- National Engineering Research Center for Biomaterials; Sichuan University; Chengdu China
- College of Marine Life Science; Ocean University of China; Qingdao China
| | - Wanshun Liu
- College of Marine Life Science; Ocean University of China; Qingdao China
| | - Baoqin Han
- College of Marine Life Science; Ocean University of China; Qingdao China
| | - Sikai Peng
- College of Marine Life Science; Ocean University of China; Qingdao China
| | - Bin He
- National Engineering Research Center for Biomaterials; Sichuan University; Chengdu China
| | - Zhongwei Gu
- National Engineering Research Center for Biomaterials; Sichuan University; Chengdu China
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27
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Negron L, Lun S, May BCH. Ovine forestomach matrix biomaterial is a broad spectrum inhibitor of matrix metalloproteinases and neutrophil elastase. Int Wound J 2012; 11:392-7. [PMID: 23116239 DOI: 10.1111/j.1742-481x.2012.01106.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Proteases play a critical role in the ordered remodelling of extracellular matrix (ECM) components during wound healing and tissue regeneration. However, the usually ordered proteolysis is compromised in chronic wounds due to over-expression and high concentrations of matrix metalloproteinase's (MMPs) and neutrophil elastase (NE). Ovine forestomach matrix (OFM) is a decellularised extracellular matrix-based biomaterial developed for tissue regeneration applications, including the treatment of chronic wounds, and is a heterogeneous mixture of ECM proteins and proteoglycans that retains the native structural and functional characteristics of tissue ECM. Given the diverse molecular species present in OFM, we hypothesised that OFM may contain components or fragments that inhibit MMP and NE activity. An extract of OFM was shown to be a potent inhibitor of a range of tissue MMPs (IC50 s = 23 ± 5 to 115 ± 14 µg/ml) and NE (IC50 = 157 ± 37 µg/ml), and was more potent than extracts prepared from a known protease modulating wound dressing. The broad spectrum activity of OFM against different classes of MMPs (i.e. collagenases, gelatinases and stromelysins) may provide a clinical advantage by more effectively addressing the protease imbalance seen in chronic wounds.
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28
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Acute and impaired wound healing: pathophysiology and current methods for drug delivery, part 1: normal and chronic wounds: biology, causes, and approaches to care. Adv Skin Wound Care 2012; 25:304-14. [PMID: 22713781 DOI: 10.1097/01.asw.0000416006.55218.d0] [Citation(s) in RCA: 413] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This is the first installment of 2 articles that discuss the biology and pathophysiology of wound healing, review the role that growth factors play in this process, and describe current ways of growth factor delivery into the wound bed. Part 1 discusses the latest advances in clinicians' understanding of the control points that regulate wound healing. Importantly, biological similarities and differences between acute and chronic wounds are considered, including the signaling pathways that initiate cellular and tissue responses after injury, which may be impeded during chronic wound healing.
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29
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Islam MR, Bach LG, Park JM, Hong SS, Lim KT. Synthesis and characterization of poly(HEMA-co-MMA)-g-POSS nanocomposites by combination of reversible addition fragmentation chain transfer polymerization and click chemistry. J Appl Polym Sci 2012. [DOI: 10.1002/app.37520] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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30
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Galezowska J, Gumienna-Kontecka E. Phosphonates, their complexes and bio-applications: A spectrum of surprising diversity. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2011.07.002] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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31
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Abstract
Proteinoid microspheres (PM) are unusual polymers formed by the thermal condensation of amino acids. Although they have been studied for over 60 years, they are only now beginning to garner interest as controlled release agents. Although they are very biocompatible, it has been problematic to design useful triggers that release small molecules from PM interiors. This has severely limited their usefulness. In the present study, short peptides have been successfully incorporated into PMs during their formation. The resulting hybrid peptide-PMs can release their interior content when hydrolyzed by a proteinase. Specifically, if a matrix metalloproteinase (MMP) cleavage site peptide is incorporated into a PM, the peptide-PM will release interior contents only in the presence of the MMP recognizing the cleavage peptide. The release rate can be determined by the concentration of the peptide in the PM synthesis mixture. This potentially makes peptide-PMs useful for delivering inhibitors or drugs into acute and chronic wounds, periodontal disease sites, and other disease states involving the fine-tuned regulation of proteinases.
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Affiliation(s)
- Stephen Quirk
- Kimberly-Clark Corporation, Roswell, Georgia 30076, USA.
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32
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Broadbent J, Walsh T, Upton Z. Proteomics in chronic wound research: Potentials in healing and health. Proteomics Clin Appl 2010; 4:204-14. [DOI: 10.1002/prca.200900152] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2009] [Revised: 09/16/2009] [Accepted: 09/17/2009] [Indexed: 01/13/2023]
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33
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Vargün E, Sankir M, Aran B, Sankir ND, Usanmaz A. Synthesis and Characterization of 2-Hydroxyethyl Methacrylate (HEMA) and Methyl Methacrylate (MMA) Copolymer Used as Biomaterial. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2010. [DOI: 10.1080/10601320903526998] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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34
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Adhirajan N, Shanmugasundaram N, Shanmuganathan S, Babu M. Collagen-based wound dressing for doxycycline delivery: in-vivo evaluation in an infected excisional wound model in rats. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.61.12.0005] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Abstract
Objectives
A novel collagen-based dressing consisting of 2,3-dihydroxybenzoic-acid-modified gelatin microspheres loaded with doxycycline has previously been reported to address both infection and matrix degradation. In the present study the potential benefits of the dressing were investigated in an excisional wound model in rats challenged with Pseudomonas aeruginosa.
Methods
A full-thick excisional wound (1.5 times 1.5 cm) was created on the dorsum of the rats and infection induced by injecting 105 colony-forming units (CFU) of P. aeruginosa. The healing pattern was assessed from wound reduction, matrix metalloprotease (MMP) levels, CFU reduction and histological and biochemical analysis.
Key findings
The treated group exhibited complete healing by day 15, compared with day 24 in the control group. Early subsidence of infection (99.9% by day 9) resulted in faster epidermal resurfacing and fibroplasias, whereas the microbial load exceeded 103 CFU even on day 15 in the control group and caused severe inflammation. Biochemical analysis showed that the expression of both collagen and hexosamine was significantly increased in the treated group. Gelatin zymography revealed prolonged expression of MMPs 2, 8 and 9 in the control group compared with the treated group.
Conclusions
The study indicates that the developed dressing attenuated both infection and metalloprotease levels, and may therefore have potential application in wound healing.
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Affiliation(s)
| | | | | | - Mary Babu
- Biomaterials Division, Central Leather Research Institute, Chennai, India
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35
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Abstract
This tutorial review aims to introduce a new kind of biomaterials-molecular hydrogels of therapeutic agents. Based on the molecular self-assembly in water, it is possible to transform therapeutic agents into analogues that form hydrogels without compromising their pharmacological efficacy. This transformation can be beneficial in three aspects: (i) the therapeutic agents become "self-deliverable" in the form of hydrogels; (ii) the self-assembly of hydrogelators of drugs might confer new and useful properties such as multivalency or high local densities; (iii) the exploration of molecular hydrogels of drugs may ultimately lead to bioactive molecules that have dual or multiple roles. By summarizing the reports on the molecular hydrogels made from clinical used drugs or other bioactive molecules, this article presents representative molecular hydrogels of therapeutics and outlines the promises and challenges for developing this new class of biomaterials.
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Affiliation(s)
- Fan Zhao
- Department of Chemistry, Brandeis University, Waltham, MA 02454, USA
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36
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Rayment EA, Upton Z. Review: Finding the Culprit: A Review of the Influences of Proteases on the Chronic Wound Environment. INT J LOW EXTR WOUND 2009; 8:19-27. [DOI: 10.1177/1534734609331596] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Chronic leg ulcers are a complex medical condition with varied underlying causes and requiring diverse treatment strategies. It is generally accepted that chronic ulcers occur when the normal wound healing process is interrupted. These wounds are characterized by excessive protease activity, abundant granulation tissue, and decreased levels of growth factors, resulting in an overall poor prognosis for the patient. Many studies have focused on identifying the key proteases, specifically matrix metalloproteinases (MMPs), responsible for an ulcer's chronicity. Of note, the results of these studies are often conflicting. This report therefore focuses on a review of this literature to identify which MMPs are important in terms of ulcer prognosis and healing outcome. This has revealed that MMPs are clearly important in many biological processes in wound healing, hence are critical to consider when developing improved therapies to enhance both ulcer healing times and ulcer healing outcomes.
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Affiliation(s)
- Erin A. Rayment
- Tissue Repair and Regeneration Program, Institute of
Health and Biomedical Innovation, Queensland University of Technology, Brisbane,
Australia
| | - Zee Upton
- Tissue Repair and Regeneration Program, Institute of
Health and Biomedical Innovation, Queensland University of Technology, Brisbane,
Australia,
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37
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Functionally modified gelatin microspheres impregnated collagen scaffold as novel wound dressing to attenuate the proteases and bacterial growth. Eur J Pharm Sci 2009; 36:235-45. [DOI: 10.1016/j.ejps.2008.09.010] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2008] [Revised: 09/13/2008] [Accepted: 09/21/2008] [Indexed: 11/18/2022]
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38
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Weng L, Romanov A, Rooney J, Chen W. Non-cytotoxic, in situ gelable hydrogels composed of N-carboxyethyl chitosan and oxidized dextran. Biomaterials 2008; 29:3905-13. [PMID: 18639926 DOI: 10.1016/j.biomaterials.2008.06.025] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2008] [Accepted: 06/27/2008] [Indexed: 10/21/2022]
Abstract
A series of in situ gelable hydrogels were prepared from oxidized dextran (Odex) and N-carboxyethyl chitosan (CEC) without any extraneous crosslinking agent. The gelation readily took place at physiological pH and body temperature. The gelation process was monitored rheologically, and the effect of the oxidation degree of dextran on the gelation process was investigated. The higher the oxidation degree of Odex, the faster the gelation. A highly porous hydrogel structure was revealed under scanning electron microscopy (SEM). Swelling and degradation of the Odex/CEC hydrogels in PBS showed that both swelling and degradation were related to the crosslinking density of the hydrogels. In particular, the hydrogels underwent fast mass loss in the first 2 weeks, followed by a more moderate degradation. The results of long-term cell viability tests revealed that the hydrogels were non-cytotoxic. Mouse fibroblasts were encapsulated in the hydrogels and cell viability was at least 95% within 3 days following encapsulation. Furthermore, cells entrapped inside the hydrogel assumed round shape initially but they gradually adapted to the new environment and spread-out to assume more spiny shapes. Additionally, the results from applying the Odex/CEC system to mice full-thickness transcutaneous wound models suggested that it was capable of enhancing wound healing.
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Affiliation(s)
- Lihui Weng
- Department of Biomedical Engineering, State University of New York-Stony Brook, Stony Brook, NY 11794-8181, USA
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