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Jiang S, Yuan C, Zou T, Koh JH, Basabrain M, Chen Q, Liu J, Heng BC, Lim LW, Wang P, Zhang C. An Injectable Hydrogel Loaded with GMSCs-Derived Neural Lineage Cells Promotes Recovery after Stroke. Tissue Eng Part A 2024. [PMID: 38756085 DOI: 10.1089/ten.tea.2023.0330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024] Open
Abstract
Ischemic stroke is a devastating medical condition with poor prognosis due to the lack of effective treatment modalities. Transplantation of human neural stem cells or primary neural cells is a promising treatment approach, but this is hindered by limited suitable cell sources and low in vitro expansion capacity. This study aimed (1) use small molecules (SM) to reprogram gingival mesenchymal stem cells (GMSCs) commitment to the neural lineage cells in vitro, and (2) use hyaluronic acid (HA) hydrogel scaffolds seeded with GMSCs-derived neural lineage cells to treat ischemic stroke in vivo. Neural induction was carried out with a SM cocktail-based one-step culture protocol over a period of 24 h. The induced cells were analyzed for expression of neural markers with immunocytochemistry and quantitative real-time polymerase chain reaction (qRT-PCR). The Sprague-Dawley (SD) rats (n = 100) were subjected to the middle cerebral artery occlusion (MCAO) reperfusion ischemic stroke model. Then, after 8 days post-MCAO, the modeled rats were randomly assigned to six study groups (n = 12 per group): (1) GMSCs, (2) GMSCs-derived neural lineage cells, (3) HA and GMSCs-derived neural lineage cells, (4) HA, (5) PBS, and (6) sham transplantation control, and received their respective transplantation. Evaluation of post-stroke recovery were performed by behavioral tests and histological assessments. The morphologically altered nature of neural lineages has been observed of the GMSCs treated with SMs compared to the untreated controls. As shown by the qRT-PCR and immunocytochemistry, SMs further significantly enhanced the expression level of neural markers of GMSCs as compared with the untreated controls (all p < 0.05). Intracerebral injection of self-assembling HA hydrogel carrying GMSCs-derived neural lineage cells promoted the recovery of neural function and reduced ischemic damage in rats with ischemic stroke, as demonstrated by histological examination and behavioral assessments (all p < 0.05). In conclusion, the SM cocktail significantly enhanced the differentiation of GMSCs into neural lineage cells. The HA hydrogel was found to facilitate the proliferation and differentiation of GMSCs-derived neural lineage cells. Furthermore, HA hydrogel seeded with GMSCs-derived neural lineage cells could promote tissue repair and functional recovery in rats with ischemic stroke and may be a promising alternative treatment modality for stroke.
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Affiliation(s)
- Shan Jiang
- Faculty of Dentistry, Restorative Dental Sciences, The University of Hong Kong, Hong Kong, China
- Shenzhen Stomatology Hospital (Pingshan), Southern Medical University, Shenzhen, China
| | - Changyong Yuan
- The Affiliated Stomatological Hospital of Xuzhou Medical University, Xuzhou, China
| | - Ting Zou
- Faculty of Dentistry, Restorative Dental Sciences, The University of Hong Kong, Hong Kong, China
- Shenzhen Stomatology Hospital (Pingshan), Southern Medical University, Shenzhen, China
| | - Jun Hao Koh
- Faculty of Dentistry, Restorative Dental Sciences, The University of Hong Kong, Hong Kong, China
| | - Mohammed Basabrain
- Faculty of Dentistry, Restorative Dental Sciences, The University of Hong Kong, Hong Kong, China
| | - Qixin Chen
- Faculty of Dentistry, Restorative Dental Sciences, The University of Hong Kong, Hong Kong, China
| | - Junqing Liu
- Faculty of Dentistry, Restorative Dental Sciences, The University of Hong Kong, Hong Kong, China
| | | | - Lee Wei Lim
- Li Ka Shing Faculty of Medicine, School of Biomedical Sciences, The University of Hong Kong, Hong Kong, China
| | - Penglai Wang
- The Affiliated Stomatological Hospital of Xuzhou Medical University, Xuzhou, China
| | - Chengfei Zhang
- Faculty of Dentistry, Restorative Dental Sciences, The University of Hong Kong, Hong Kong, China
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Zou T, Liang Y, Kang J, Liu J, Kang W, Jiang S, Zhang C. Oxygen enrichment mediated by calcium peroxide loaded gelatin methacrylate hydrogel eradicates periodontal biofilms. Int J Biol Macromol 2024; 265:130868. [PMID: 38492687 DOI: 10.1016/j.ijbiomac.2024.130868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 03/18/2024]
Abstract
The low oxygen environment of the periodontal pocket favors pathogenic anaerobes' growth, biofilm formation, and quick recurrence after periodontal treatment. In contrast, oxygen is detrimental to anaerobes, such as Porphyromonas gingivalis (P. gingivalis), since they lack a complete anti-oxidation mechanism to detoxify the oxygen challenge. Therefore, consistently feeding pathogenic anaerobes with abundant oxygen would be an effective strategy to combat them. Here, we reported injectable oxygen-generating hydrogels as oxygen mediators to alleviate the local anaerobic environment and eliminate periodontal pathogens. Gelatin methacrylate (GelMA) hydrogels loaded with calcium peroxide (CPO) possessed excellent injectability and exhibited burst releases of oxygen within 24 h with a 40 % oxygen tension peak. CPO-GelMA hydrogels with CPO concentrations of 5, 10, and 15 % reduced 60, 99, and 89.9 % viable P. gingivalis, respectively. Five percentage CPO-GelMA hydrogel downregulated gingipain and fimA gene expression in P. gingivalis without resistance development. Moreover, the CPO-GelMA hydrogels remarkably prevented biofilm formation and eradicated both monospecies and multispecies bacterial biofilms. In conclusion, CPO-GelMA hydrogels exert remarkable antimicrobial and antibiofilm effects on subgingival biofilms, providing a promising strategy for periodontal treatment.
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Affiliation(s)
- Ting Zou
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong; Shenzhen Stomatology Hospital (Pingshan), Southern Medical University, Shenzhen, China
| | - Ye Liang
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - Jun Kang
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - Junqing Liu
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - Wenyan Kang
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong
| | - Shan Jiang
- Shenzhen Stomatology Hospital (Pingshan), Southern Medical University, Shenzhen, China
| | - Chengfei Zhang
- Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong.
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Liu J, Zou T, Zhang Y, Koh J, Li H, Wang Y, Zhao Y, Zhang C. Three-dimensional electroconductive carbon nanotube-based hydrogel scaffolds enhance neural differentiation of stem cells from apical papilla. BIOMATERIALS ADVANCES 2022; 138:212868. [PMID: 35913250 DOI: 10.1016/j.bioadv.2022.212868] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 04/30/2022] [Accepted: 05/13/2022] [Indexed: 06/15/2023]
Abstract
The radical treatment of neurological impairments remains a major clinical challenge. Stem cells with high neural differentiation ability delivered by electroconductive hydrogel scaffolds have demonstrated promising applications in neural tissue regeneration. However, there are still challenges in designing bioactive scaffolds with good biocompatibility, appropriate electrical conductivity, and neurogenic niche. Herein, a three-dimensional (3D) electroconductive gelatin methacryloyl-multi-walled carbon nanotube/cobalt (GelMA-MWCNTs/Co) hydrogel scaffold was fabricated by incorporating MWCNTs/Co composites into a GelMA hydrogel matrix. The surface morphology, pore size, elastic modulus, swelling ratio, and conductivity of the hydrogels were measured. GelMA-MWCNTs/Co exhibited higher electrical conductivity than GelMA-MWCNTs. Live/dead and CCK8 assays demonstrated the good biocompatibility of the hydrogel for stem cells from apical papilla (SCAP) growth and differentiation. The cells encapsulated in the GelMA-MWCNTs and GelMA-MWCNTs/Co hydrogel scaffolds exhibited significant neuronal cell-like changes and a notable level of neuronal-specific marker expression after the electrical stimulation (ES) for 7 days, compared to that in the hydrogels without ES. Notably, the neurite spreading and Tuj1 fluorescent intensity of the SCAP in the electrically conductive GelMA-MWCNTs/Co hydrogel were more prominent compared to those of the other two groups. In addition, the 3D conductive hydrogel scaffolds advanced the neural differentiation of SCAP to an earlier time point. Considering these aspects, the novel electroconductive GelMA-MWCNTs/Co hydrogel synergized with ES greatly promotes SCAP neuronal differentiation.
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Affiliation(s)
- Junqing Liu
- Restorative Dental Sciences, Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China; Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen, Guangdong, China
| | - Ting Zou
- Restorative Dental Sciences, Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China; Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen, Guangdong, China
| | - Yuchen Zhang
- Restorative Dental Sciences, Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China; Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen, Guangdong, China
| | - Junhao Koh
- Restorative Dental Sciences, Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China
| | - Hongwen Li
- Department of Dentistry, Longgang ENT Hospital, Shenzhen, Guangdong, China; Shenzhen Longgang Institute of Stomatology, Longgang, Shenzhen, Guangdong, China
| | - Yan Wang
- Department of VIP Center, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China
| | - Yi Zhao
- Straits Institute of Flexible Electronics (SIFE, Future Technologies), Fujian Normal University, Fuzhou, Fujian, China
| | - Chengfei Zhang
- Restorative Dental Sciences, Endodontology, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China; Shenzhen Institute of Research and Innovation, The University of Hong Kong, Shenzhen, Guangdong, China..
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