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Stan D, Ruta LL, Bocancia-Mateescu LA, Mirica AC, Stan D, Micutz M, Brincoveanu O, Enciu AM, Codrici E, Popescu ID, Popa ML, Rotaru F, Tanase C. Formulation and Comprehensive Evaluation of Biohybrid Hydrogel Membranes Containing Doxycycline or Silver Nanoparticles. Pharmaceutics 2023; 15:2696. [PMID: 38140037 PMCID: PMC10747233 DOI: 10.3390/pharmaceutics15122696] [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: 09/18/2023] [Revised: 10/31/2023] [Accepted: 11/23/2023] [Indexed: 12/24/2023] Open
Abstract
Complicated wounds often require specialized medical treatments, and hydrogels have emerged as a popular choice for wound dressings in such cases due to their unique properties and the ability to incorporate and release therapeutic agents. Our focus was to develop and characterize a new optimized formula for biohybrid hydrogel membranes, which combine natural and synthetic polymers, bioactive natural compounds, like collagen and hyaluronic acid, and pharmacologically active substances (doxycycline or npAg). Dynamic (oscillatory) rheometry confirmed the strong gel-like properties of the obtained hydrogel membranes. Samples containing low-dose DOXY showed a swelling index of 285.68 ± 6.99%, a degradation rate of 71.6 ± 0.91% at 20 h, and achieved a cumulative drug release of approximately 90% at pH 7.4 and 80% at pH 8.3 within 12 h. The addition of npAg influenced the physical properties of the hydrogel membranes. Furthermore, the samples containing DOXY demonstrated exceptional antimicrobial efficacy against seven selected bacterial strains commonly associated with wound infections and complications. Biocompatibility assessments revealed that the samples exhibited over 80% cell viability. However, the addition of smaller-sized nanoparticles led to decreased cellular viability. The obtained biohybrid hydrogel membranes show favorable properties that render them suitable for application as wound dressings.
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Affiliation(s)
- Diana Stan
- DDS Diagnostic, Segovia 1 Str., 031427 Bucharest, Romania; (L.L.R.); (L.-A.B.-M.); (A.-C.M.); (D.S.)
- Doctoral School of Medicine, Titu Maiorescu University, 040441 Bucharest, Romania
| | - Lavinia Liliana Ruta
- DDS Diagnostic, Segovia 1 Str., 031427 Bucharest, Romania; (L.L.R.); (L.-A.B.-M.); (A.-C.M.); (D.S.)
- Department of Inorganic, Organic Chemistry, Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, 90–92 Panduri Str., 050663 Bucharest, Romania
| | | | - Andreea-Cristina Mirica
- DDS Diagnostic, Segovia 1 Str., 031427 Bucharest, Romania; (L.L.R.); (L.-A.B.-M.); (A.-C.M.); (D.S.)
| | - Dana Stan
- DDS Diagnostic, Segovia 1 Str., 031427 Bucharest, Romania; (L.L.R.); (L.-A.B.-M.); (A.-C.M.); (D.S.)
| | - Marin Micutz
- Department of Analytical and Physical Chemistry, University of Bucharest, 4-12 Regina Elisabeta Blvd., 030018 Bucharest, Romania;
| | - Oana Brincoveanu
- National Institute for R&D in Microtechnology, 077190 Bucharest, Romania;
- Research Institute, The University of Bucharest, 060102 Bucharest, Romania
| | - Ana-Maria Enciu
- Victor Babes National Institute of Pathology, 050096 Bucharest, Romania; (A.-M.E.); (E.C.); (I.D.P.); (C.T.)
- Department of Cell Biology and Histology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania;
| | - Elena Codrici
- Victor Babes National Institute of Pathology, 050096 Bucharest, Romania; (A.-M.E.); (E.C.); (I.D.P.); (C.T.)
| | - Ionela Daniela Popescu
- Victor Babes National Institute of Pathology, 050096 Bucharest, Romania; (A.-M.E.); (E.C.); (I.D.P.); (C.T.)
| | - Maria Linda Popa
- Department of Cell Biology and Histology, Carol Davila University of Medicine and Pharmacy, 050474 Bucharest, Romania;
| | - Flaviana Rotaru
- Polytechnic University of Bucharest, Splaiul Independenței 54, 030167 Bucharest, Romania;
- Rohealth—Health and Bioeconomy Cluster, Calea Griviţei 6-8, 010731 Bucharest, Romania
- Frontier Management Consulting, Calea Griviţei6-8, 010731 Bucharest, Romania
| | - Cristiana Tanase
- Victor Babes National Institute of Pathology, 050096 Bucharest, Romania; (A.-M.E.); (E.C.); (I.D.P.); (C.T.)
- Department of Cell Biology and Clinical Biochemistry, Titu Maiorescu University, 031593 Bucharest, Romania
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Ho TC, Lim JS, Kim SJ, Kim SY, Chun BS. In Vitro Biodegradation, Drug Absorption, and Physical Properties of Gelatin-Fucoidan Microspheres Made of Subcritical-Water-Modified Fish Gelatin. Mar Drugs 2023; 21:md21050287. [PMID: 37233481 DOI: 10.3390/md21050287] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 04/28/2023] [Accepted: 05/01/2023] [Indexed: 05/27/2023] Open
Abstract
This study aimed to prepare gelatin-fucoidan microspheres with enhanced doxorubicin binding efficiency and controllable biodegradation using fish gelatin combined with low molecular weight (LMW) gelatin and fucoidan at fixed ratios. The MW of gelatin was modified by subcritical water (SW), which is known as a safe solvent, at 120 °C, 140 °C, and 160 °C. In addition, gelatin-fucoidan microspheres were prepared using a solvent exchange technique. Our findings revealed that particle size decreased, the surface was rougher, the swelling ratio increased, and particle shape was irregular in microspheres composed of SW-modified gelatin. Doxorubicin binding efficiency was improved by fucoidan and SW-modified gelatin at 120 °C but not at 140 °C and 160 °C. Interestingly, an increase in in vitro enzymatic degradation was observed in the microspheres consisting of SW-modified fish gelatin, although the cross-linking degree between them was not significantly different. This is because LMW gelatin could form more cross-linked bonds, which might be weaker than the intramolecular bonds of gelatin molecules. Gelatin-fucoidan microspheres consisting of SW-modified fish gelatin with controlled biodegradation rates could be a candidate for a short-term transient embolization agent. In addition, SW would be a promising method to modify the MW of gelatin for medical applications.
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Affiliation(s)
- Truc Cong Ho
- PL MICROMED Co., Ltd., 1F, 15-5, Yangju 3-gil, Yangsan-si 50620, Republic of Korea
| | - Ju-Sop Lim
- PL MICROMED Co., Ltd., 1F, 15-5, Yangju 3-gil, Yangsan-si 50620, Republic of Korea
| | - Shin-Jun Kim
- PL MICROMED Co., Ltd., 1F, 15-5, Yangju 3-gil, Yangsan-si 50620, Republic of Korea
| | - Sung-Yeoul Kim
- PL MICROMED Co., Ltd., 1F, 15-5, Yangju 3-gil, Yangsan-si 50620, Republic of Korea
| | - Byung-Soo Chun
- Department of Food Science and Technology, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan 48513, Republic of Korea
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Wang G, Yang F, Zhou W, Xiao N, Luo M, Tang Z. The initiation of oxidative stress and therapeutic strategies in wound healing. Biomed Pharmacother 2023; 157:114004. [PMID: 36375308 DOI: 10.1016/j.biopha.2022.114004] [Citation(s) in RCA: 51] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 11/09/2022] [Accepted: 11/09/2022] [Indexed: 11/13/2022] Open
Abstract
When the production of reactive oxygen species (ROS) is overloaded surpassing the capacity of the reductive rheostat, mammalian cells undergo a series of oxidative damage termed oxidative stress (OS). This phenomenon is ubiquitously detected in many human pathological conditions. Wound healing program implicates continuous neovascularization, cell proliferation, and wound remodeling. Increasing evidence indicates that reactive oxygen species (ROS) have profound impacts on the wound healing process through regulating a series of the physiological and pathological program including inflammatory response, cell proliferation, angiogenesis, granulation as well as extracellular matrix formation. In most pathological wound healing processes, excessive ROS exerts a negative role on the wound healing process. Interestingly, the moderate increase of ROS levels is beneficial in killing bacteria at the wound site, which creates a sterile niche for revascularization. In this review, we discussed the physiological rhythms of wound healing and the role of ROS in this progress, aim to explore the potential manipulation of OS as a promising therapeutic avenue.
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Affiliation(s)
- Gang Wang
- Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China; Drug Discovery Research Center, Southwest Medical University, Luzhou, China; Department of Pharmacology, college of Pharmacy, Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Drug Metabolism, Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing, China, Chongqing, China
| | - Feifei Yang
- Department of Pharmacology, college of Pharmacy, Chongqing Medical University, Chongqing, China
| | - Weiying Zhou
- Department of Pharmacology, college of Pharmacy, Chongqing Medical University, Chongqing, China; Chongqing Key Laboratory of Drug Metabolism, Key Laboratory for Biochemistry and Molecular Pharmacology of Chongqing, Chongqing, China, Chongqing, China
| | - Nanyang Xiao
- Department of Microbiology, University of Chicago, Chicago, IL, USA
| | - Mao Luo
- Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China; Drug Discovery Research Center, Southwest Medical University, Luzhou, China.
| | - Zonghao Tang
- Laboratory for Cardiovascular Pharmacology of Department of Pharmacology, The School of Pharmacy, Southwest Medical University, Luzhou, China; Drug Discovery Research Center, Southwest Medical University, Luzhou, China; Cedars-Sinai Medical Center, Los Angeles, CA, USA.
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Qian C, Zheng Y, Xu Z, Zhang Z, Li H, Chen X. Preparation of Cross-Linked Bovine Tendon Acellular Fibers and Study of Their Biophysical and Chemical Properties. J Biomed Nanotechnol 2022. [DOI: 10.1166/jbn.2022.3476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
To explore the effect of glutaraldehyde (GA) and 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) cross-linking on the biophysical and chemical properties of acellular scaffold to better provide suitable donor materials for tendon reconstruction. GA and EDC with different concentrations
and action time gradients were used to cross-link the acellular scaffold. By detecting the collagen content in the cross-linked scaffold and the cytotoxicity, the cross-linking scheme with minimal damage to the scaffold and minimal cytotoxicity was explored for subsequent studies. The biomechanical
properties (durability, elastic modulus, stressmax) of the scaffolds in GA, EDC, acellular scaffold, and tendon groups were compared, and the scaffold rat models were constructed to further evaluate their in vivo histocompatibility. Under different concentration gradients,
the collagen content of the scaffolds in the GA and EDC groups had no obvious difference. When 0.5% GA was cross-linked for 24 h, and the mass ratio of EDC (1:2) was cross-linked for 4 h, the inhibition rate of the scaffold extract on fibroblasts was the lowest. In the mechanical property
test, the Stressmax, durability, and elastic modulus of the cross-linked acellular scaffolds were significantly improved than those before cross-linking, and the elastic modulus of the EDC acellular scaffold was similar to that of the bovine tendon. In the compatibility test, compared
with the acellular scaffold group, fibroblast activity in the GA group decreased obviously, and the scaffold implanted in rat models led to a persistent chronic inflammatory reaction. However, cells in the EDC group could maintain good activity. Moreover, the scaffold had good compatibility
with rats and did not cause an obvious inflammatory reaction. EDC cross-linking scheme will not damage the acellular scaffold, and the cytotoxicity of the obtained scaffold is controllable. Additionally, EDC cross-linked acellular scaffold has mechanical properties similar to normal tendons
and excellent histocompatibility.
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Zhang R, Lin M, Wang C, Li Y, Li Y, Zou Q. Bioinspired fabrication of EDC-crosslinked gelatin/nanohydroxyapatite injectable microspheres for bone repair. INT J POLYM MATER PO 2022. [DOI: 10.1080/00914037.2022.2082423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Rui Zhang
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Mingyue Lin
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Chenxin Wang
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Yufan Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Yubao Li
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
| | - Qin Zou
- Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu, China
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Typical structure, biocompatibility, and cell proliferation bioactivity of collagen from Tilapia and Pacific cod. Colloids Surf B Biointerfaces 2021; 210:112238. [PMID: 34838415 DOI: 10.1016/j.colsurfb.2021.112238] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 11/06/2021] [Accepted: 11/16/2021] [Indexed: 01/06/2023]
Abstract
Aquatic collagens, as the alternative sources of mammalian collagen, have received increasing attention due to its low-cost, low-antigenicity, biocompatibility, and biodegradability. Pepsin-soluble collagens were extracted from the skins of Oreochromis mossambicus (Om-PSC) and Gadus macrocephalus (Gm-PSC), and their structural properties and bioactivities were probed to reveal their potential applications in biomedical material for tissue engineering. The results of Fourier transforms-infrared spectroscopy (FT-IR), circular dichroism (CD), X-ray diffraction (XRD), ultraviolet (UV) and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) demonstrated that Om-PSC and Gm-PSC had similar and intact triple helical structures. The amino acid composition and peptide profiles revealed Om-PSC and Gm-PSC were identified as type I collagen with the typical repetitive sequence of (Gly-X-Y) n. However, the denaturation temperature (Td) was determined to be 29.7 ℃ of Om-PSC, much higher than that of Gm-PSC (17.3 ℃). Toxicological experiments demonstrated Om-PSC and Gm-PSC both had good biocompatibility and cytocompatibility, which met the requirements of medical materials. Fluorescence imaging and cell cycle distribution revealed Om-PSC and Gm-PSC could promote the proliferation of fibroblast and osteoblast cells. Therefore, Om-PSC and Gm-PSC showed the advantages in medical materials.
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Contessi Negrini N, Lipreri MV, Tanzi MC, Farè S. In vitro cell delivery by gelatin microspheres prepared in water-in-oil emulsion. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2020; 31:26. [PMID: 32060637 DOI: 10.1007/s10856-020-6363-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Accepted: 01/27/2020] [Indexed: 06/10/2023]
Abstract
The regeneration of injured or damaged tissues by cell delivery approaches requires the fabrication of cell carriers (e.g., microspheres, MS) that allow for cell delivery to limit cells spreading from the injection site. Ideal MS for cell delivery should allow for cells adhesion and proliferation on the MS before the injection, while they should allow for viable cells release after the injection to promote the damaged tissue regeneration. We optimized a water-in-oil emulsion method to obtain gelatin MS crosslinked by methylenebisacrylamide (MBA). The method we propose allowed obtaining spherical, chemically crosslinked MS characterized by a percentage crosslinking degree of 74.5 ± 2.1%. The chemically crosslinked gelatin MS are characterized by a diameter of 70.9 ± 17.2 μm in the dry state and, at swelling plateau in culture medium at 37 °C, by a diameter of 169.3 ± 41.3 μm. The MS show dimensional stability up to 28 days, after which they undergo complete degradation. Moreover, during their degradation, MS release gelatin that can improve the engraftment of cells in the injured site. The produced MS did not induce any cytotoxic effect in vitro and they supported viable L929 fibroblasts adhesion and proliferation. The MS released viable cells able to colonize and proliferate on the tissue culture plastic, used as release substrate, potentially proving their ability in supporting a simplified in vitro wound healing process, thus representing an optimal tool for cell delivery applications.
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Affiliation(s)
- Nicola Contessi Negrini
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy.
- INSTM, National Interuniversity Consortium of Materials Science and Technology, Local Unit Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy.
| | - Maria Veronica Lipreri
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
| | - Maria Cristina Tanzi
- INSTM, National Interuniversity Consortium of Materials Science and Technology, Local Unit Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
| | - Silvia Farè
- Department of Chemistry, Materials and Chemical Engineering "G. Natta", Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
- INSTM, National Interuniversity Consortium of Materials Science and Technology, Local Unit Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133, Milan, Italy
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De Clercq K, Xie F, De Wever O, Descamps B, Hoorens A, Vermeulen A, Ceelen W, Vervaet C. Preclinical evaluation of local prolonged release of paclitaxel from gelatin microspheres for the prevention of recurrence of peritoneal carcinomatosis in advanced ovarian cancer. Sci Rep 2019; 9:14881. [PMID: 31619730 PMCID: PMC6795903 DOI: 10.1038/s41598-019-51419-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Accepted: 09/25/2019] [Indexed: 01/12/2023] Open
Abstract
Patients with advanced ovarian cancer develop recurrence despite initial treatment response to standard treatment of surgery and intravenous/intraperitoneal (IP) chemotherapy, partly due to a limited peritoneal exposure time of chemotherapeutics. Paclitaxel-loaded genipin-crosslinked gelatin microspheres (PTX-GP-MS) are evaluated for the treatment of microscopic peritoneal carcinomatosis and prevention of recurrent disease. The highest drug load (39.2 µg PTX/mg MS) was obtained by immersion of GP-MS in aqueous PTX nanosuspension (PTXnano-GP-MS) instead of ethanolic PTX solution (PTXEtOH-GP-MS). PTX release from PTX-GP-MS was prolonged. PTXnano-GP-MS displayed a more controlled release compared to a biphasic release from PTXEtOH-GP-MS. Anticancer efficacy of IP PTX-GP-MS (PTXEtOH-GP-MS, D = 7.5 mg PTX/kg; PTXnano-GP-MS D = 7.5 and 35 mg PTX/kg), IP nanoparticular albumin-bound PTX (D = 35 mg PTX/kg) and controls (0.9% NaCl, blank GP-MS) was evaluated in a microscopic peritoneal carcinomatosis xenograft mouse model. PTXnano-GP-MS showed superior anticancer efficacy with significant increased survival time, decreased peritoneal carcinomatosis index score and ascites incidence. However, prolonged PTX release over 14 days from PTXnano-GP-MS caused drug-related toxicity in 27% of high-dosed PTXnano-GP-MS-treated mice. Dose simulations for PTXnano-GP-MS demonstrated an optimal survival without drug-induced toxicity in a range of 7.5-15 mg PTX/kg. Low-dosed PTXnano-GP-MS can be a promising IP drug delivery system to prevent recurrent ovarian cancer.
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Affiliation(s)
- Kaat De Clercq
- Laboratory of Pharmaceutical Technology, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Feifan Xie
- Laboratory for Medical Biochemistry and Clinical Analysis, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium
| | - Olivier De Wever
- Laboratory of Experimental Cancer Research, Ghent University, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Benedicte Descamps
- Infinity (IBiTech-MEDISIP), Department of Electronics and Information Systems, Ghent University, Corneel Heymanslaan 10, 9000, Ghent, Belgium
| | - Anne Hoorens
- Department of Pathology, Ghent University Hospital, Corneel Heymanslaan 10, 9000, Ghent, Belgium
| | - An Vermeulen
- Department of Gastro-intestinal Surgery, Ghent University Hospital, Corneel Heymanslaan 10, 9000, Ghent, Belgium
| | - Wim Ceelen
- Department of Gastro-intestinal Surgery, Ghent University Hospital, Corneel Heymanslaan 10, 9000, Ghent, Belgium
- Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Chris Vervaet
- Laboratory of Pharmaceutical Technology, Ghent University, Ottergemsesteenweg 460, 9000, Ghent, Belgium.
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Shi M, Zhang H, Song T, Liu X, Gao Y, Zhou J, Li Y. Sustainable Dual Release of Antibiotic and Growth Factor from pH-Responsive Uniform Alginate Composite Microparticles to Enhance Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2019; 11:22730-22744. [PMID: 31141337 DOI: 10.1021/acsami.9b04750] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Hydrogel-based wound dressings provided a moist microenvironment and local release of bioactive molecules. Single drug loading along with fast release rates and usually in hydrogel sheets limited their performance. Hence, uniform alginate/CaCO3 composite microparticles (∼430 μm) with tunable compositions for sustainable release of drug and pH-sensitivity were successfully fabricated using microfluidic technology. Due to the presence of CaCO3 and the strong interactions with alginate molecules, lyophilized composite microparticles reverted to hydrogel state after rehydration. Regardless of microparticle states (hydrogel or lyophilized) and pH values (6.4 or 7.4), in vitro release rates of model drug were inversely related with CaCO3 concentrations and much lower than that for pure alginate microparticles. The release rate at pH 6.4 (simulating wound microenvironment) was always slower than that at pH 7.4 for the same type of microparticles. Rifamycin and basic fibroblast growth factor (bFGF) were independently encapsulated into AD-5-R and AD-40-F to achieve a fast release of rifamycin and a slower, more sustained release of bFGF, respectively; CD-F-R was a mixture of AD-5-R and AD-40-F at weight ratio 1/1. For AD-5-R and CD-F-R, inhibition zones of S. aureus were observed until day 5, showing a sustained antibacterial property. On the basis of in vitro wound healing model of NIH-3T3 cell micropattern on glass coverslips with a hole array, it was found that AD-40-F and CD-F-R significantly promoted cell proliferation and migration rates. In a full-thickness skin wound model of rats, CD-F-R microparticles significantly accelerated wound healing with higher granulation tissue thickness and better bioactivity to stimulate angiogenesis than the control group. Furthermore, CD-F-R microparticles demonstrated a good biocompatibility and biodegradability in vivo. Taken together, CD-F-R composite microparticles may ideally meet the requirements for different stages during wound healing and demonstrated a good potential to be used as dressing materials.
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Affiliation(s)
- Ming Shi
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
| | - Hao Zhang
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
| | - Ting Song
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
| | - Xiaofang Liu
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
| | - Yunfen Gao
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
| | - Jianhua Zhou
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
- Division of Engineering in Medicine, Department of Medicine, Brigham and Women's Hospital , Harvard Medical School , Cambridge , Massachusetts 02139 , United States
| | - Yan Li
- Guangdong Provincial Key Laboratory of Sensor Technology and Biomedical Instrument, School of Biomedical Engineering , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
- Guangdong Provincial Engineering and Technology Center of Advanced and Portable Medical Devices , Sun Yat-sen University , Guangzhou 510006 , Guangdong , P.R. China
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Nouri-Felekori M, Khakbiz M, Nezafati N, Mohammadi J, Eslaminejad MB. Comparative analysis and properties evaluation of gelatin microspheres crosslinked with glutaraldehyde and 3-glycidoxypropyltrimethoxysilane as drug delivery systems for the antibiotic vancomycin. Int J Pharm 2018; 557:208-220. [PMID: 30597262 DOI: 10.1016/j.ijpharm.2018.12.054] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 12/01/2018] [Accepted: 12/17/2018] [Indexed: 11/30/2022]
Abstract
In the present comparative study, gelatin microspheres (GMs) were prepared by emulsification-solvent-extraction method using well-known crosslinker: glutaraldehyde (GA) and biocompatible silane-coupling agent: glycidoxypropyltrimethoxysilane (GPTMS). Crosslinking with GA was done by a definite and common procedure, while GPTMS crosslinking potency was investigated after 5, 10, 24, and 48 h synthesis periods and the fabrication method was adjusted in order for preparation of GMs with optimized morphological and compositional characteristics. The prepared GMs were then evaluated and compared as drug delivery systems for the antibiotic vancomycin (Vm). Morphological observations, FTIR, ninhydrin assay, swelling behavior evaluation and Hydrolytic degradation analysis proved successful modification of GMs and revealed that increasing synthesis time from 5 h to 24 h and 48 h, when using GPTMS as crosslinker, led to formation of morphologically-optimized GMs with highest crosslinking degree (∼50%) and the slowest hydrolytic degradation rate. Such GMs also exhibited most sustained release period of Vm. The antibacterial test results against gram-positive bacterium Staphylococcus aureus, were in accordance with the release profiles of Vm, as well. Together, GPTMS-crosslinked GMs with their preferable characteristics and known as biocompatible gelatin-siloxane hybrids, could act as proper drug delivery systems for the sustained release of the antibiotic vancomycin.
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Affiliation(s)
- Mohammad Nouri-Felekori
- Division of Biomedical Engineering, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 14395-1561, Iran
| | - Mehrdad Khakbiz
- Division of Biomedical Engineering, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 14395-1561, Iran.
| | - Nader Nezafati
- Biomaterials Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Karaj, Iran
| | - Javad Mohammadi
- Division of Biomedical Engineering, Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 14395-1561, Iran
| | - Mohamadreza Baghaban Eslaminejad
- Department of Stem Cells and Developmental Biology, Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran
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Reiter T, Panick T, Schuhladen K, Roether JA, Hum J, Boccaccini AR. Bioactive glass based scaffolds coated with gelatin for the sustained release of icariin. Bioact Mater 2018; 4:1-7. [PMID: 30505983 PMCID: PMC6250853 DOI: 10.1016/j.bioactmat.2018.10.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 10/24/2018] [Accepted: 10/29/2018] [Indexed: 01/21/2023] Open
Abstract
Gelatin-coated, 3D sponge-like scaffolds based on 45S5 bioactive glass were produced using the foam replication technique. Compressive strength tests of gelatin-coated samples compared to uncoated scaffolds showed significant strengthening and toughening effects of the gelatin coating with compressive strength values in the range of cortical bone. Additionally, the crosslinked gelatin network (using either caffeic acid or N-(3-Dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (EDC)/N-hxdroxysuccinimide (NHS) as crosslinking agent) was shown to be a suitable candidate for the sustained release of the bioactive molecule icariin. Concerning bioactivity of the produced scaffolds, characterization by FTIR and SEM indicated the formation of hydroxyapatite (HA) in all samples after immersion in simulated body fluid (SBF) for 14 days, highlighting the favorable combination of mechanical robustness, bioactivity and drug delivery capability of this new type of scaffolds. Foam like bioactive glass scaffolds produced by replication technique. Gelatin coatings confer increased compression strength to scaffolds. Crosslinked gelatin coating is suitable candidate for the sustained release of icariin. Favorable combination of bioactivity, gelatin coating and icariin release demonstrated.
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Liu W, Yang X, Li N, Xi G, Wang M, Liang B, Feng Y, Chen H, Shi C, Li W. Genipin crosslinked microspheres as an effective hemostatic agent. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4377] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Wen Liu
- Wenzhou Institute of Biomaterials and Engineering; CNITECH, CAS; Wenzhou Zhejiang 325011 China
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering; Wenzhou Medical University; Wenzhou Zhejiang 325011 China
| | - Xiao Yang
- Wenzhou Institute of Biomaterials and Engineering; CNITECH, CAS; Wenzhou Zhejiang 325011 China
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering; Wenzhou Medical University; Wenzhou Zhejiang 325011 China
- School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin); Tianjin University; Tianjin 300072 China
| | - Na Li
- Wenzhou Institute of Biomaterials and Engineering; CNITECH, CAS; Wenzhou Zhejiang 325011 China
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering; Wenzhou Medical University; Wenzhou Zhejiang 325011 China
| | - Guanghui Xi
- Wenzhou Institute of Biomaterials and Engineering; CNITECH, CAS; Wenzhou Zhejiang 325011 China
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering; Wenzhou Medical University; Wenzhou Zhejiang 325011 China
| | - Mingshan Wang
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou Medical University; Wenzhou Zhejiang 325000 China
| | - Bin Liang
- The First Affiliated Hospital of Wenzhou Medical University, Wenzhou Medical University; Wenzhou Zhejiang 325000 China
| | - Yakai Feng
- Wenzhou Institute of Biomaterials and Engineering; CNITECH, CAS; Wenzhou Zhejiang 325011 China
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering; Wenzhou Medical University; Wenzhou Zhejiang 325011 China
- School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemical Science and Chemical Engineering (Tianjin); Tianjin University; Tianjin 300072 China
| | - Hao Chen
- Wenzhou Institute of Biomaterials and Engineering; CNITECH, CAS; Wenzhou Zhejiang 325011 China
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering; Wenzhou Medical University; Wenzhou Zhejiang 325011 China
| | - Changcan Shi
- Wenzhou Institute of Biomaterials and Engineering; CNITECH, CAS; Wenzhou Zhejiang 325011 China
- School of Ophthalmology and Optometry, Eye Hospital, School of Biomedical Engineering; Wenzhou Medical University; Wenzhou Zhejiang 325011 China
| | - Wenzhong Li
- Institut für Chemie und Biochemie; Freie Universität Berlin; Takustrasse 3, 14195 Berlin Germany
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Xue M, Zhao R, Lin H, Jackson C. Delivery systems of current biologicals for the treatment of chronic cutaneous wounds and severe burns. Adv Drug Deliv Rev 2018; 129:219-241. [PMID: 29567398 DOI: 10.1016/j.addr.2018.03.002] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 02/08/2018] [Accepted: 03/13/2018] [Indexed: 12/15/2022]
Abstract
While wound therapy remains a clinical challenge in current medical practice, much effort has focused on developing biological therapeutic approaches. This paper presents a comprehensive review of delivery systems for current biologicals for the treatment of chronic wounds and severe burns. The biologicals discussed here include proteins such as growth factors and gene modifying molecules, which may be delivered to wounds free, encapsulated, or released from living systems (cells, skin grafts or skin equivalents) or biomaterials. Advances in biomaterial science and technologies have enabled the synthesis of delivery systems such as scaffolds, hydrogels and nanoparticles, designed to not only allow spatially and temporally controlled release of biologicals, but to also emulate the natural extracellular matrix microenvironment. These technologies represent an attractive field for regenerative wound therapy, by offering more personalised and effective treatments.
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Nawaz S, Khan S, Farooq U, Haider MS, Ranjha NM, Rasul A, Nawaz A, Arshad N, Hameed R. Biocompatible hydrogels for the controlled delivery of anti-hypertensive agent: development, characterization and in vitro evaluation. Des Monomers Polym 2018. [DOI: 10.1080/15685551.2018.1445416] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Affiliation(s)
- Shahid Nawaz
- Faculty of Pharmacy, Bahauddin Zakariya University , Multan, Pakistan
| | - Samiullah Khan
- Faculty of Pharmacy and Alternative Medicine, The Islamia University of Bahawalpur , Punjab, Pakistan
| | - Umar Farooq
- Faculty of Pharmacy, Bahauddin Zakariya University , Multan, Pakistan
| | | | | | - Akhtar Rasul
- Department of Pharmacy, Government College University Faisalabad , Faisalabad, Pakistan
| | - Ahmad Nawaz
- Department of Pharmacy, COMSATS Institute of Information Technology , Abbottabad, Pakistan
| | - Numera Arshad
- Faculty of Pharmacy, Punjab University Lahore , Lahore, Pakistan
| | - Rabia Hameed
- Department of Pharmacy, Government College University Faisalabad , Faisalabad, Pakistan
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Naeem F, Khan S, Jalil A, Ranjha NM, Riaz A, Haider MS, Sarwar S, Saher F, Afzal S. pH responsive cross-linked polymeric matrices based on natural polymers: effect of process variables on swelling characterization and drug delivery properties. BIOIMPACTS : BI 2017; 7:177-192. [PMID: 29159145 PMCID: PMC5684509 DOI: 10.15171/bi.2017.21] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2017] [Revised: 07/15/2017] [Accepted: 07/16/2017] [Indexed: 01/29/2023]
Abstract
Introduction: The current work was aimed to design and synthesize novel crosslinked pH-sensitive gelatin/pectin (Ge/Pec) hydrogels using different polymeric ratios and to explore the effect of polymers and degree of crosslinking on dynamic, equilibrium swelling and in vitro release behavior of the model drug (Mannitol). Methods: The Ge/Pec based hydrogels were prepared using glutaraldehyde as the crosslinker. Various structural parameters that affect their release behavior were determined, including swelling study, porosity, sol-gel analysis, average molecular weight between crosslinks (Mc), volume fraction of polymer (V2,s), solvent interaction parameter (χ) and diffusion coefficient. The synthesized hydrogels were subjected to various characterization tools like Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and DSC differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). Results: The hydrogels show highest water uptake and release at lower pH values. The FTIR spectra showed an interaction between Ge and Pec, and the drug-loaded samples also showed the drug-related peaks, indicating proper loading of the drug. DSC and TGA studies confirmed the thermal stability of hydrogel samples, while SEM showed the porous nature of hydrogels. The drug release followed non-Fickian diffusion or anomalous mechanism. Conclusion: Aforementioned characterizations reveal the successful formation of copolymer hydrogels. The pH-sensitive swelling ability and drug release behavior suggest that the rate of polymer chain relaxation and drug diffusion from these hydrogels are comparable which also predicts their possible use for site-specific drug delivery.
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Affiliation(s)
- Fahad Naeem
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | - Samiullah Khan
- Faculty of Pharmacy and Alternative Medicine, The Islamia University of Bahawalpur 63100, Punjab, Pakistan
| | - Aamir Jalil
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | | | - Amina Riaz
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | | | - Shoaib Sarwar
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | - Fareha Saher
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
| | - Samrin Afzal
- Faculty of Pharmacy, Bahauddin Zakariya University, Multan-60800 Pakistan
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Natural polymeric microspheres for modulated drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 75:408-417. [DOI: 10.1016/j.msec.2017.02.051] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 12/16/2016] [Accepted: 02/14/2017] [Indexed: 11/19/2022]
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17
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Sangfai T, Tantishaiyakul V, Hirun N, Li L. Microphase Separation and Gelation of Methylcellulose in the Presence of Gallic Acid and NaCl as an In Situ Gel-Forming Drug Delivery System. AAPS PharmSciTech 2017; 18:605-616. [PMID: 27170164 DOI: 10.1208/s12249-016-0546-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Accepted: 04/28/2016] [Indexed: 11/30/2022] Open
Abstract
Novel hydrogels of methylcellulose (MC) with gallic acid (GA) and NaCl were developed for an in situ gel-forming delivery system. Plain MC and GA/NaCl/MC were characterized using micro-differential scanning calorimetry (micro-DSC), rheological and turbidity methods. The gelation temperatures of MC were reduced to body temperature with adding GA/NaCl. GA and NaCl caused slightly different effects on the gelation/degelation temperatures during heating/cooling, respectively, based on the different sensitivities of these three techniques. The gelation mechanism was investigated by UV spectrophotometry, and the hydrophobic interaction between the aromatic ring of GA and MC was verified. The NaCl/MC hydrogel had smaller micropores than GA/MC and MC, indicating a greater cross-linked density. Doxycycline (DX) was loaded into the systems and demonstrated a synergistic effect of DX/GA. Both GA and DX exhibited a sustained release. The hydrogel of GA/4NaCl/MC could be potentially used for the in situ delivery of DX for deep wound healing.
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Genipin-crosslinked gelatin microspheres as a strategy to prevent postsurgical peritoneal adhesions: In vitro and in vivo characterization. Biomaterials 2016; 96:33-46. [DOI: 10.1016/j.biomaterials.2016.04.012] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Revised: 04/11/2016] [Accepted: 04/13/2016] [Indexed: 01/27/2023]
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Abstract
INTRODUCTION Complete regeneration and restoration of the skin's structure and function with no or minimal scarring remains the goal of wound healing research. Novel pharmaceutical carriers have the potential to deliver wound healing drugs such as antibiotics, antimicrobials, human EGFs, and so on. Thus, offering a potential platform to overcome the limitations of conventional wound dressings. AREAS COVERED This review will describe various techniques such as microspheres, nanoparticles, liposomes, solid lipid nanoparticles, nano and microemulsions, sponges and wafers, and so on, that are successfully applied as carriers for wound healing drugs. Results of various studies including in vitro and in vivo experiments are also discussed. EXPERT OPINION Controlled and localized delivery of wound healing drugs to the wounds is more convenient than systemic administration as higher concentrations of the medication are delivered directly to the desired area in a sustained manner. They are also capable of providing optimum environmental conditions to facilitate wound healing while eliminating the need for frequent changes of dressings. As the number of people suffering from chronic wounds is increasing around the world, controlled delivery of wound healing agents have enormous potential for patient-friendly wound management.
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Affiliation(s)
- Lalduhsanga Pachuau
- a Department of Pharmaceutical Sciences, Assam University , Silchar, Assam 788011, India +91 986 236 2392 ;
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Improved In Vitro Biocompatibility of Surface-Modified Hydroxyapatite Sponge Scaffold with Gelatin and BMP-2 in Comparison Against a Commercial Bone Allograft. ASAIO J 2015; 61:78-86. [DOI: 10.1097/mat.0000000000000155] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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22
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Kim JH, Ryu TK, Jeong KY, Paik DH, Moon SK, Choi SW. Fabrication of poly(d,l-lactide-co-glycolide) nanoparticles using a simple fluidic device with a tapered glass capillary and the effect of thermodynamic parameters. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2014. [DOI: 10.1007/s40005-014-0162-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Biofunctionalization of gelatin microcarrier with oxidized hyaluronic acid for corneal keratocyte cultivation. Colloids Surf B Biointerfaces 2014; 122:277-286. [DOI: 10.1016/j.colsurfb.2014.07.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 07/07/2014] [Accepted: 07/08/2014] [Indexed: 12/22/2022]
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24
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Peng Z, Li Z, Zhang F, Peng X. In-VitroDegradation and Cytotoxicity of Gelatin/Chitosan Microspheres for Drug Controlled Release. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2014. [DOI: 10.1080/10601325.2014.925262] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Functionally modified gelatin microspheres as a growth factor’s delivery system: development and characterization. Polym Bull (Berl) 2014. [DOI: 10.1007/s00289-014-1108-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Serban MA, Knight T, Payne RG, Basu J, Rivera EA, Robbins N, McCoy D, Halberstadt C, Jain D, Bertram TA. Cross-linked gelatin microspheres with continuously tunable degradation profiles for renal tissue regeneration. Biotechnol Appl Biochem 2013; 61:75-81. [DOI: 10.1002/bab.1125] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Accepted: 05/16/2013] [Indexed: 11/08/2022]
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The graft survival protection of subcutaneous allogeneic islets with hydrogel grafting and encapsulated by CTLA4Ig and IL1ra. Polym J 2013. [DOI: 10.1038/pj.2013.71] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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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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Reves BT, Bumgardner JD, Haggard WO. Fabrication of crosslinked carboxymethylchitosan microspheres and their incorporation into composite scaffolds for enhanced bone regeneration. J Biomed Mater Res B Appl Biomater 2013; 101:630-9. [DOI: 10.1002/jbm.b.32865] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 09/11/2012] [Accepted: 11/12/2012] [Indexed: 11/08/2022]
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Calejo MT, Almeida AJ, Fernandes AI. Exploring a new jellyfish collagen in the production of microparticles for protein delivery. J Microencapsul 2012; 29:520-31. [PMID: 22732101 DOI: 10.3109/02652048.2012.665089] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A microparticulate protein delivery system was developed using collagen, from the medusa Catostylus tagi, as a polymeric matrix. Collagen microparticles (CMPs) were produced by an emulsification-gelation-solvent extraction method and a high loading efficiency was found for the entrapment of lysozyme and α-lactalbumin. CMPs were cross-linked with 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC). The uncross-linked CMPs were spherical, rough-surfaced, presenting an estimated median size of 28 µm by laser diffraction. Upon cross-linking, particle size (9.5 µm) and size distribution were reduced. CMPs showed a moderate hydrophobic behaviour and a positive surface charge. Cross-linking also resulted in greater stability in water, allowing a slow release, as shown by in vitro experiments. The assessment of lysozyme's biological activity showed that the protein remained active throughout the encapsulation and cross-linking processes. In summary, the work herein described shows the potential use of a marine collagen in the production of microparticles for the controlled release of therapeutic proteins.
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Affiliation(s)
- M Teresa Calejo
- CiiEM, Instituto Superior de Ciências da Saúde Egas Moniz, Campus Universitário, Quinta da Granja , Monte de Caparica, 2829-511 Caparica, Portugal
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Tang G, Zhang H, Zhao Y, Li X, Yuan X, Wang M. Prolonged release from PLGA/HAp scaffolds containing drug-loaded PLGA/gelatin composite microspheres. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:419-429. [PMID: 22095448 DOI: 10.1007/s10856-011-4493-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Accepted: 11/07/2011] [Indexed: 05/31/2023]
Abstract
Porous scaffolds that can prolong the release of bioactive factors are urgently required in bone tissue engineering. In this study, PLGA/gelatin composite microspheres (PGMs) were carefully designed and prepared by entrapping poly(L: -lactide-co-glycolide) (PLGA) microspheres (PMs) in gelatin matrix. By mixing PGMs with PLGA solution directly, drug-loaded PLGA/carbonated hydroxyapatite (HAp)/PGMs composite scaffolds were successfully fabricated. In vitro release of fluorescein isothiocyanate-dextran (FD70S) as a model drug from the scaffolds as well as PMs and PGMs was studied by immersing samples in phosphate buffered saline (pH = 7.4) at 37°C for 32 days. Compared with PMs, PGMs and PLGA/HAp/PGMs scaffolds exhibited slow and steady release behavior with constant release rate and insignificantly original burst release. The swelling of PGMs, diffusion of drugs, and degradation of polymer dominated the release behaviors synergistically. The PLGA/HAp/PGMs scaffold offers a novel option for sequential or simultaneous release of several drugs in terms of bone regeneration.
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Affiliation(s)
- Gongwen Tang
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials, Tianjin University, Tianjin, China
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Gérard VA, Maguire CM, Bazou D, Gun'ko YK. Folic acid modified gelatine coated quantum dots as potential reagents for in vitro cancer diagnostics. J Nanobiotechnology 2011; 9:50. [PMID: 22074171 PMCID: PMC3230131 DOI: 10.1186/1477-3155-9-50] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Accepted: 11/10/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Gelatine coating was previously shown to effectively reduce the cytotoxicity of CdTe Quantum Dots (QDs) which was a first step towards utilising them for biomedical applications. To be useful they also need to be target-specific which can be achieved by conjugating them with Folic Acid (FA). RESULTS The modification of QDs with FA via an original "one-pot" synthetic route was proved successful by a range of characterisation techniques including UV-visible absorption spectroscopy, Photoluminescence (PL) emission spectroscopy, fluorescence life-time measurements, Transmission Electron Microscopy (TEM) and Dynamic Light Scattering (DLS). The resulting nanocomposites were tested in Caco-2 cell cultures which over-express FA receptors. The presence of FA on the surface of QDs significantly improved the uptake by targeted cells. CONCLUSIONS The modification with folic acid enabled to achieve a significant cellular uptake and cytotoxicity towards a selected cancer cell lines (Caco-2) of gelatine-coated TGA-CdTe quantum dots, which demonstrated good potential for in vitro cancer diagnostics.
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Zhou Z, Zhou J, Liu L, Yi Q, Liu Q, Zeng W, Yang Z. Fabrication and Characterization of Gelatin/Chitosan Microspheres for Drug Release. J MACROMOL SCI B 2011. [DOI: 10.1080/00222348.2011.609800] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Zhihua Zhou
- a Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan , P. R. China
| | - Jianan Zhou
- a Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan , P. R. China
| | - Lihua Liu
- a Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan , P. R. China
| | - Qingfeng Yi
- a Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan , P. R. China
| | - Qingquan Liu
- a Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan , P. R. China
| | - Wennan Zeng
- a Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan , P. R. China
| | - Zhongmin Yang
- a Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, School of Chemistry and Chemical Engineering , Hunan University of Science and Technology , Xiangtan , P. R. China
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Affiliation(s)
- Z. Y. Peng
- a College of Chemistry and Chemical Engineering , Jishou University , Jishou, P. R. China
| | - Y. Q. Shen
- a College of Chemistry and Chemical Engineering , Jishou University , Jishou, P. R. China
| | - Z. P. Li
- a College of Chemistry and Chemical Engineering , Jishou University , Jishou, P. R. China
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Solorio L, Zwolinski C, Lund AW, Farrell MJ, Stegemann JP. Gelatin microspheres crosslinked with genipin for local delivery of growth factors. J Tissue Eng Regen Med 2011; 4:514-23. [PMID: 20872738 DOI: 10.1002/term.267] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A main challenge in tissue engineering and regenerative medicine is achieving local and efficient growth factor release to guide cell function. Gelatin is a denatured form of collagen that cells can bind to and degrade through enzymatic action. In this study, gelatin microspheres were used to release bone morphogenetic protein 2 (BMP2). Spherical microparticles with diameters in the range of 2-6 µm were created by an emulsification process and were stabilized by crosslinking with the small molecule genipin. The degree of crosslinking was varied by controlling the incubation time in genipin solution. Loading rate studies, using soy bean trypsin inhibitor as a model protein, showed rapid protein uptake over the first 24 h, followed by a levelling off and then a further increase after approximately 3 days, as the microspheres swelled. Growth factor release studies using microspheres crosslinked to 20%, 50% and 80% of saturation and then loaded with BMP2 showed that higher degrees of crosslinking resulted in higher loading efficiency and slower protein release. After 24 h, the concentration profiles produced by all microsphere formulations were steady and approximately equal. Microspheres incubated with adult human mesenchymal stem cells accumulated preferentially on the cell surface, and degraded over time in culture. BMP2-loaded microspheres caused a three- to eight-fold increase in expression of the bone sialoprotein gene after 14 days in culture, with more crosslinked beads producing a greater effect. These results demonstrate that genipin-crosslinked gelatin microspheres can be used to deliver growth factors locally to cells in order to direct their function.
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Affiliation(s)
- Luis Solorio
- Department of Biomedical Engineering, Rensselaer Polytechnic Institute, Troy, NY, USA
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Layman H, Li X, Nagar E, Vial X, Pham SM, Andreopoulos FM. Enhanced angiogenic efficacy through controlled and sustained delivery of FGF-2 and G-CSF from fibrin hydrogels containing ionic-albumin microspheres. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2010; 23:185-206. [PMID: 21192837 DOI: 10.1163/092050610x546417] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Neo-vessel formation in ischemic tissues relies on numerous growth factors and cell fractions for the formation of mature, stable, functional vasculature. However, the efforts to regenerate tissues typically rely on the administration of a single growth factor or cells alone. Conversely, polymeric matrices have been investigated extensively to deliver multiple growth factors at pre-determined rates to form stable blood vessels in ischemic tissues. We report on a novel sequential delivery system of a fibrin hydrogel containing ionic-albumin microspheres that allows for the controlled release of two growth factors. The use of this system was investigated in the context of therapeutic angiogenesis. Material properties were determined based on degree of swelling measurements and degradation characteristics. Release kinetics of model angiogenic polypeptides FGF-2 and G-CSF were determined using ELISA and the bioactivity of released protein was evaluated in human endothelial cell cultures. The release of growth factors from ionic-albumin microspheres was significantly delayed compared to the growth factor released from fibrin matrices in the absence of spheres. The scaffolds were implanted in a murine critical limb ischemia model at two concentrations, 40 ng (low) and 400 ng (high), restoring 92% of the blood flow in a normally perfused limb using a fibrin hydrogel releasing FGF-2 containing albumin-PLL microspheres releasing G-CSF (measured by LDPI at the high concentration), a 3.2-fold increase compared to untreated limbs. The extent of neo-vessel formation was delineated by immunohistochemical staining for capillary density (CD-31+) and mature vessel formation (α-SMA+). In conclusion, our study demonstrated that the release kinetics from our scaffold have distinct kinetics previously unpublished and the delivery of these factors resulted in hindlimb reperfusion, and robust capillary and mature vessel formation after 8 weeks compared to either growth factor alone or bolus administration of growth factor.
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Affiliation(s)
- Hans Layman
- Department of Surgery, University of California at San Francisco, San Francisco, CA, USA
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Recombinant Gelatin Microspheres: Novel Formulations for Tissue Repair? Tissue Eng Part A 2010; 16:1811-21. [DOI: 10.1089/ten.tea.2009.0592] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Glattauer V, White JF, Tsai WB, Tsai CC, Tebb TA, Danon SJ, Werkmeister JA, Ramshaw JAM. Preparation of resorbable collagen-based beads for direct use in tissue engineering and cell therapy applications. J Biomed Mater Res A 2010; 92:1301-9. [PMID: 19343777 DOI: 10.1002/jbm.a.32468] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
For tissue engineering and cell therapy applications, expansion of cells such as chondrocytes on beads in spinner culture can provide advantages compared with monolayer culture. The use of resorbable beads that can be included as an integral part of the construct provides the advantage of minimizing the extent of cell handling and eliminating a final trypsin treatment to detach cells from the bead. In this study, we have made various types of beads based on native collagen and denatured collagen (gelatin). The beads have been stabilized by different extents of glutaraldehyde cross-linking, and characterized by a combination of chemical analysis, thermal stability, and microscopy. In vitro examination in the presence and absence of chondrocytes showed that stability increased with the extent of crosslinking and could also be influenced by the manner of fabrication. On the basis of the in vitro stability studies, gelatin beads of a defined stability were shown to resorb over time in subcutaneous implants in nude mice compared with more stable demineralized bone particle (DMB) carriers. These data indicate that for direct use in tissue engineering or cell therapy applications, where resorbable beads can be used for cell expansion and then direct delivery of cells, it is possible to design suitable carrier beads with a range of stabilities that match the implant requirements.
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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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Mohan N, Nair PD, Tabata Y. A 3D biodegradable protein based matrix for cartilage tissue engineering and stem cell differentiation to cartilage. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20 Suppl 1:S49-60. [PMID: 18560767 DOI: 10.1007/s10856-008-3481-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2007] [Accepted: 05/19/2008] [Indexed: 05/20/2023]
Abstract
A protein based 3D porous scaffold is fabricated by blending gelatin and albumin. The biomimetic biodegradable gelatin, promoted good cell adhesion and its hydrophilic nature enabled absorption of culture media. Albumin is proposed to serve as a nontoxic foaming agent and also helped to attain a hydrophobic-hydrophilic balance. The hydrophobic-hydrophilic balance and appropriate crosslinking of the scaffold avoided extensive swelling, as well as retained the stability of scaffold in culture medium for long period. The scaffold is found to be highly porous with open interconnected pores. The adequate swelling and mechanical property of the scaffold helped to withstand the loads imparted by the cells during in vitro culture. The scaffold served as a nontoxic material to monolayer of fibroblast cells and is found to be cell compatible. The suitability of scaffold for chondrocyte culture and stem cell differentiation to chondrocytes is further explored in this work. The scaffold provided appropriate environment for chondrocyte culture, resulting in deposition of cartilage specific matrix molecules that completely masked the pores of the porous scaffold. The scaffold promoted the proliferation and differentiation of mesenchymal stem cells to chondrocytes in presence of growth factors. The transforming growth factor, TGFbeta3 promoted better chondrogenic differentiation than its isoform TGFbeta1 in this scaffold.
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Affiliation(s)
- Neethu Mohan
- Laboratory for Polymer Analysis, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India.
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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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