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Seo JY, Lee B, Kang TW, Noh JH, Kim MJ, Ji YB, Ju HJ, Min BH, Kim MS. Electrostatically Interactive Injectable Hydrogels for Drug Delivery. Tissue Eng Regen Med 2018; 15:513-520. [PMID: 30603575 PMCID: PMC6171702 DOI: 10.1007/s13770-018-0146-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/03/2018] [Accepted: 07/15/2018] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Several injectable hydrogels have been developed extensively for a broad range of biomedical applications. Injectable hydrogels forming in situ through the change in external stimuli have the distinct properties of easy management and minimal invasiveness, and thus provide the advantage of bypassing surgical procedures for administration resulting in better patient compliance. METHODS The injectable in situ-forming hydrogels can be formed irreversibly or reversibly under physiological stimuli. Among several external stimuli that induce formation of hydrogels in situ, in this review, we focused on the electrostatic interactions as the most simple and interesting stimulus. RESULTS Currently, numerous polyelectrolytes have been reported as potential electrostatically interactive in situ-forming hydrogels. In this review, a comprehensive overview of the rapidly developing electrostatically interactive in situ-forming hydrogels, which are produced by various anionic and cationic polyelectrolytes such as chitosan, celluloses, and alginates, has been outlined and summarized. Further, their biomedical applications have also been discussed. CONCLUSION The review concludes with perspectives on the future of electrostatically interactive in situ-forming hydrogels.
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Affiliation(s)
- Ji Young Seo
- Department of Molecular Science and Technology, Ajou University, 206 Worldcup-ro, Yeongton-gu, Suwon, 16499 Republic of Korea
| | - Bong Lee
- Department of Polymer Engineering, Pukyong National University, 45 Yongso-ro, Nam-Gu, Busan, 48513 Republic of Korea
| | - Tae Woong Kang
- Department of Molecular Science and Technology, Ajou University, 206 Worldcup-ro, Yeongton-gu, Suwon, 16499 Republic of Korea
| | - Jung Hyun Noh
- Department of Molecular Science and Technology, Ajou University, 206 Worldcup-ro, Yeongton-gu, Suwon, 16499 Republic of Korea
| | - Min Ju Kim
- Department of Molecular Science and Technology, Ajou University, 206 Worldcup-ro, Yeongton-gu, Suwon, 16499 Republic of Korea
| | - Yun Bae Ji
- Department of Molecular Science and Technology, Ajou University, 206 Worldcup-ro, Yeongton-gu, Suwon, 16499 Republic of Korea
| | - Hyeon Jin Ju
- Department of Molecular Science and Technology, Ajou University, 206 Worldcup-ro, Yeongton-gu, Suwon, 16499 Republic of Korea
| | - Byoung Hyun Min
- Department of Molecular Science and Technology, Ajou University, 206 Worldcup-ro, Yeongton-gu, Suwon, 16499 Republic of Korea
- Cell Therapy Center, Ajou University Medical Center, 206 Worldcup-ro, Yeongton-gu, Suwon, 16499 Republic of Korea
| | - Moon Suk Kim
- Department of Molecular Science and Technology, Ajou University, 206 Worldcup-ro, Yeongton-gu, Suwon, 16499 Republic of Korea
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Zhang YR, Xu KJ, Bai YL, Tang LQ, Jiang ZY, Liu YP, Liu ZJ, Zhou LC, Zhou XF. Features of the volume change and a new constitutive equation of hydrogels under uniaxial compression. J Mech Behav Biomed Mater 2018; 85:181-187. [PMID: 29906673 DOI: 10.1016/j.jmbbm.2018.06.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/26/2018] [Accepted: 06/02/2018] [Indexed: 11/26/2022]
Abstract
For high-water content hydrogels in compression, the water inside of hydrogels contributes to the response of hydrogels to external loads directly, but part of the water is expelled from hydrogels in the meantime to change the volume of the hydrogel and reduce the contribution. In order to consider the contribution of the water in the constitution equation, PVA (polyvinyl alcohol) hydrogels with high-water content were used as examples, and compressive experiments were carried out to measure both the stress-strain relation and the change of the volume in the meantime. By considering the effect of the difference of the contribution of water in different directions of the hydrogel, we deduced a new constitutive equation, which can pretty well depict the stress-strain of hydrogels with different water contents. The results showed that the contribution of water to the total stress increases with the compression strain and even exceed that of the polymer, although the expelled water reduces the contribution at the early loading stage, which well explains the difference of elastic moduli of hydrogels in compression and tension.
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Affiliation(s)
- Y R Zhang
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China; Guangdong Institute of Intelligent Manufacturing, Guangzhou, China
| | - K J Xu
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - Y L Bai
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China; LNM, Institute of Mechanics, Chinese Academy of Sciences, Beijing, China
| | - L Q Tang
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China; State Key Laboratory of Subtropical Building Science, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China.
| | - Z Y Jiang
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - Y P Liu
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - Z J Liu
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - L C Zhou
- School of Civil Engineering and Transportation, South China University of Technology, No.381, Wushan Road, Guangzhou, Guangdong, China
| | - X F Zhou
- Guangdong Institute of Intelligent Manufacturing, Guangzhou, China
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Del Vento F, Vermeulen M, de Michele F, Giudice MG, Poels J, des Rieux A, Wyns C. Tissue Engineering to Improve Immature Testicular Tissue and Cell Transplantation Outcomes: One Step Closer to Fertility Restoration for Prepubertal Boys Exposed to Gonadotoxic Treatments. Int J Mol Sci 2018; 19:ijms19010286. [PMID: 29346308 PMCID: PMC5796232 DOI: 10.3390/ijms19010286] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 01/16/2018] [Accepted: 01/16/2018] [Indexed: 12/15/2022] Open
Abstract
Despite their important contribution to the cure of both oncological and benign diseases, gonadotoxic therapies present the risk of a severe impairment of fertility. Sperm cryopreservation is not an option to preserve prepubertal boys’ reproductive potential, as their seminiferous tubules only contain spermatogonial stem cells (as diploid precursors of spermatozoa). Cryobanking of human immature testicular tissue (ITT) prior to gonadotoxic therapies is an accepted practice. Evaluation of cryopreserved ITT using xenotransplantation in nude mice showed the survival of a limited proportion of spermatogonia and their ability to proliferate and initiate differentiation. However, complete spermatogenesis could not be achieved in the mouse model. Loss of germ cells after ITT grafting points to the need to optimize the transplantation technique. Tissue engineering, a new branch of science that aims at improving cellular environment using scaffolds and molecules administration, might be an approach for further progress. In this review, after summarizing the lessons learned from human prepubertal testicular germ cells or tissue xenotransplantation experiments, we will focus on the benefits that might be gathered using bioengineering techniques to enhance transplantation outcomes by optimizing early tissue graft revascularization, protecting cells from toxic insults linked to ischemic injury and exploring strategies to promote cellular differentiation.
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Affiliation(s)
- Federico Del Vento
- Gynecology-Andrology Unit, Medical School, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200 Brussels, Belgium; (F.D.V.); (M.V.); (F.d.M.); (M.G.G.)
| | - Maxime Vermeulen
- Gynecology-Andrology Unit, Medical School, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200 Brussels, Belgium; (F.D.V.); (M.V.); (F.d.M.); (M.G.G.)
| | - Francesca de Michele
- Gynecology-Andrology Unit, Medical School, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200 Brussels, Belgium; (F.D.V.); (M.V.); (F.d.M.); (M.G.G.)
- Department of Gynecology-Andrology, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium;
| | - Maria Grazia Giudice
- Gynecology-Andrology Unit, Medical School, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200 Brussels, Belgium; (F.D.V.); (M.V.); (F.d.M.); (M.G.G.)
- Department of Gynecology-Andrology, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium;
| | - Jonathan Poels
- Department of Gynecology-Andrology, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium;
| | - Anne des Rieux
- Advanced Drug Delivery and Biomaterials Unit, Louvain Drug Research Institute, Université Catholique de Louvain, 1200 Brussels, Belgium;
| | - Christine Wyns
- Gynecology-Andrology Unit, Medical School, Institut de Recherche Expérimentale et Clinique, Université Catholique de Louvain, 1200 Brussels, Belgium; (F.D.V.); (M.V.); (F.d.M.); (M.G.G.)
- Department of Gynecology-Andrology, Cliniques Universitaires Saint-Luc, 1200 Brussels, Belgium;
- Correspondence: ; Tel.: +32-2-764-95-01
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Wang Y, Kim R, Hinman SS, Zwarycz B, Magness ST, Allbritton NL. Bioengineered Systems and Designer Matrices That Recapitulate the Intestinal Stem Cell Niche. Cell Mol Gastroenterol Hepatol 2018; 5:440-453.e1. [PMID: 29675459 PMCID: PMC5904029 DOI: 10.1016/j.jcmgh.2018.01.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Accepted: 01/09/2018] [Indexed: 02/07/2023]
Abstract
The relationship between intestinal stem cells (ISCs) and the surrounding niche environment is complex and dynamic. Key factors localized at the base of the crypt are necessary to promote ISC self-renewal and proliferation, to ultimately provide a constant stream of differentiated cells to maintain the epithelial barrier. These factors diminish as epithelial cells divide, migrate away from the crypt base, differentiate into the postmitotic lineages, and end their life span in approximately 7 days when they are sloughed into the intestinal lumen. To facilitate the rapid and complex physiology of ISC-driven epithelial renewal, in vivo gradients of growth factors, extracellular matrix, bacterial products, gases, and stiffness are formed along the crypt-villus axis. New bioengineered tools and platforms are available to recapitulate various gradients and support the stereotypical cellular responses associated with these gradients. Many of these technologies have been paired with primary small intestinal and colonic epithelial cells to re-create select aspects of normal physiology or disease states. These biomimetic platforms are becoming increasingly sophisticated with the rapid discovery of new niche factors and gradients. These advancements are contributing to the development of high-fidelity tissue constructs for basic science applications, drug screening, and personalized medicine applications. Here, we discuss the direct and indirect evidence for many of the important gradients found in vivo and their successful application to date in bioengineered in vitro models, including organ-on-chip and microfluidic culture devices.
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Key Words
- 3D, 3-dimensional
- BMP, Bone morphogenetic protein
- Bioengineering
- ECM, extracellular matrix
- Eph, erythropoietin-producing human hepatocellular receptor
- Ephrin, Eph family receptor interacting proteins
- Gradients
- IFN-γ, interferon-γ
- ISC, intestinal stem cell
- Intestinal Epithelial Cells
- NO, nitric oxide
- SFCA, short-chain fatty acids
- Stem Cell Niche
- TA, transit amplifying
- Wnt, wingless-related integration site
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Affiliation(s)
- Yuli Wang
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina
| | - Raehyun Kim
- Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, and North Carolina State University, Raleigh, North Carolina
| | - Samuel S. Hinman
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina
| | - Bailey Zwarycz
- Department of Cell Biology and Physiology, University of North Carolina, Chapel Hill, North Carolina
| | - Scott T. Magness
- Department of Cell Biology and Physiology, University of North Carolina, Chapel Hill, North Carolina,Department of Medicine, University of North Carolina, Chapel Hill, North Carolina,Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, and North Carolina State University, Raleigh, North Carolina,Scott T. Magness, PhD, Department of Biomedical Engineering, 111 Mason Farm Road, Room 4337 Medical Biomolecular Research Building, University of North Carolina, Chapel Hill, North Carolina 27599. fax: (919) 966-2284.
| | - Nancy L. Allbritton
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina,Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, and North Carolina State University, Raleigh, North Carolina,Correspondence Address correspondence to: Nancy L. Allbritton, MD, PhD, Department of Biomedical Engineering, Chapman Hall, Room 241, University of North Carolina, Chapel Hill, North Carolina 27599. fax: (919) 966-2963.
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Abstract
Articular cartilage (AC) is a seemingly simple tissue that has only one type of constituting cell and no blood vessels and nerves. In the early days of tissue engineering, cartilage appeared to be an easy and promising target for reconstruction and this was especially motivating because of widespread AC pathologies such as osteoarthritis and frequent sports-induced injuries. However, AC has proven to be anything but simple. Recreating the varying properties of its zonal structure is a challenge that has not yet been fully answered. This caused the shift in tissue engineering strategies toward bioinspired or biomimetic approaches that attempt to mimic and simulate as much as possible the structure and function of the native tissues. Hydrogels, particularly gradient hydrogels, have shown great potential as components of the biomimetic engineering of the cartilaginous tissue.
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Affiliation(s)
- Ivana Gadjanski
- Belgrade Metropolitan University, Belgrade, Serbia
- BioSense Institute, University of Novi Sad, Novi Sad, Serbia
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Gadjanski I. Recent advances on gradient hydrogels in biomimetic cartilage tissue engineering. F1000Res 2017; 6:F1000 Faculty Rev-2158. [PMID: 29333257 PMCID: PMC5749123 DOI: 10.12688/f1000research.12391.2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/27/2018] [Indexed: 12/20/2022] Open
Abstract
Articular cartilage (AC) is a seemingly simple tissue that has only one type of constituting cell and no blood vessels and nerves. In the early days of tissue engineering, cartilage appeared to be an easy and promising target for reconstruction and this was especially motivating because of widespread AC pathologies such as osteoarthritis and frequent sports-induced injuries. However, AC has proven to be anything but simple. Recreating the varying properties of its zonal structure is a challenge that has not yet been fully answered. This caused the shift in tissue engineering strategies toward bioinspired or biomimetic approaches that attempt to mimic and simulate as much as possible the structure and function of the native tissues. Hydrogels, particularly gradient hydrogels, have shown great potential as components of the biomimetic engineering of the cartilaginous tissue.
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Affiliation(s)
- Ivana Gadjanski
- Belgrade Metropolitan University, Belgrade, Serbia
- BioSense Institute, University of Novi Sad, Novi Sad, Serbia
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57
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Long H, Ma K, Xiao Z, Ren X, Yang G. Preparation and characteristics of gelatin sponges crosslinked by microbial transglutaminase. PeerJ 2017; 5:e3665. [PMID: 28828260 PMCID: PMC5554441 DOI: 10.7717/peerj.3665] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Accepted: 07/19/2017] [Indexed: 02/05/2023] Open
Abstract
Microbial transglutaminase (mTG) was used as a crosslinking agent in the preparation of gelatin sponges. The physical properties of the materials were evaluated by measuring their material porosity, water absorption, and elastic modulus. The stability of the sponges were assessed via hydrolysis and enzymolysis. To study the material degradation in vivo, subcutaneous implantations of sponges were performed on rats for 1–3 months, and the implanted sponges were analyzed. To evaluate the cell compatibility of the mTG crosslinked gelatin sponges (mTG sponges), adipose-derived stromal stem cells were cultured and inoculated into the scaffold. Cell proliferation and viability were measured using alamarBlue assay and LIVE/DEAD fluorescence staining, respectively. Cell adhesion on the sponges was observed by scanning electron microscopy (SEM). Results show that mTG sponges have uniform pore size, high porosity and water absorption, and good mechanical properties. In subcutaneous implantation, the material was partially degraded in the first month and completely absorbed in the third month. Cell experiments showed evident cell proliferation and high viability. Results also showed that the cells grew vigorously and adhered tightly to the sponge. In conclusion, mTG sponge has good biocompatibility and can be used in tissue engineering and regenerative medicine.
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Affiliation(s)
- Haiyan Long
- Center of Engineering-Training, Chengdu Aeronautic Polytechnic, Chengdu, China
| | - Kunlong Ma
- Department of Orthopaedics, Yongchuan Hospital, Chongqing Medical University, Chongqing, China
| | - Zhenghua Xiao
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Xiaomei Ren
- Department of Medical Information and Engineering, School of Electrical Engineering and Information, Sichuan University, Chengdu, China
| | - Gang Yang
- Department of Medical Information and Engineering, School of Electrical Engineering and Information, Sichuan University, Chengdu, China
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