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Tabish TA, Hussain MZ, Zervou S, Myers WK, Tu W, Xu J, Beer I, Huang WE, Chandrawati R, Crabtree MJ, Winyard PG, Lygate CA. S-nitrosocysteamine-functionalised porous graphene oxide nanosheets as nitric oxide delivery vehicles for cardiovascular applications. Redox Biol 2024; 72:103144. [PMID: 38613920 PMCID: PMC11026843 DOI: 10.1016/j.redox.2024.103144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 03/29/2024] [Indexed: 04/15/2024] Open
Abstract
Nitric oxide (NO) is a key signalling molecule released by vascular endothelial cells that is essential for vascular health. Low NO bioactivity is associated with cardiovascular diseases, such as hypertension, atherosclerosis, and heart failure and NO donors are a mainstay of drug treatment. However, many NO donors are associated with the development of tolerance and adverse effects, so new formulations for controlled and targeted release of NO would be advantageous. Herein, we describe the design and characterisation of a novel NO delivery system via the reaction of acidified sodium nitrite with thiol groups that had been introduced by cysteamine conjugation to porous graphene oxide nanosheets, thereby generating S-nitrosated nanosheets. An NO electrode, ozone-based chemiluminescence and electron paramagnetic resonance spectroscopy were used to measure NO released from various graphene formulations, which was sustained at >5 × 10-10 mol cm-2 min-1 for at least 3 h, compared with healthy endothelium (cf. 0.5-4 × 10-10 mol cm-2 min-1). Single cell Raman micro-spectroscopy showed that vascular endothelial and smooth muscle cells (SMCs) took up graphene nanostructures, with intracellular NO release detected via a fluorescent NO-specific probe. Functionalised graphene had a dose-dependent effect to promote proliferation in endothelial cells and to inhibit growth in SMCs, which was associated with cGMP release indicating intracellular activation of canonical NO signalling. Chemiluminescence detected negligible production of toxic N-nitrosamines. Our findings demonstrate the utility of porous graphene oxide as a NO delivery vehicle to release physiologically relevant amounts of NO in vitro, thereby highlighting the potential of these formulations as a strategy for the treatment of cardiovascular diseases.
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Affiliation(s)
- Tanveer A Tabish
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation (BHF) Centre of Research Excellence, University of Oxford, Headington, Oxford, OX3 7BN, United Kingdom.
| | - Mian Zahid Hussain
- School of Natural Sciences and Catalysis Research Centre, Department of Chemistry, Chair of Inorganic and Metal-Organic Chemistry, Technical University of Munich (TUM), Lichtenbergstraße 4, 85748, Garching, Germany
| | - Sevasti Zervou
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation (BHF) Centre of Research Excellence, University of Oxford, Headington, Oxford, OX3 7BN, United Kingdom
| | - William K Myers
- Centre for Advanced Electron Spin Resonance (CAESR), Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, Oxford, OX1 3QR, United Kingdom
| | - Weiming Tu
- Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom
| | - Jiabao Xu
- Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom; James Watt School of Engineering, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
| | - Irina Beer
- Institute of Water Chemistry, Chair of Analytical Chemistry and Water Chemistry, Technical University of Munich, Lichtenbergstraße 4, 85748, Garching, Germany
| | - Wei E Huang
- Department of Engineering Science, University of Oxford, Oxford, OX1 3PJ, United Kingdom
| | - Rona Chandrawati
- School of Chemical Engineering and Australian Centre for Nanomedicine (ACN), The University of New South Wales (UNSW), Sydney, NSW, 2052, Australia
| | - Mark J Crabtree
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation (BHF) Centre of Research Excellence, University of Oxford, Headington, Oxford, OX3 7BN, United Kingdom; Department of Biochemical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Paul G Winyard
- University of Exeter Medical School, Faculty of Health and Life Sciences, University of Exeter, Exeter, EX1 2LU, United Kingdom
| | - Craig A Lygate
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine, British Heart Foundation (BHF) Centre of Research Excellence, University of Oxford, Headington, Oxford, OX3 7BN, United Kingdom
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Elsherif NI, Al-Mahallawi AM, Ahmed IS, Shamma RN. Pectin nanoparticles loaded with nitric oxide donor drug: A potential approach for tissue regeneration. Int J Pharm X 2024; 7:100244. [PMID: 38585344 PMCID: PMC10997829 DOI: 10.1016/j.ijpx.2024.100244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 03/30/2024] [Accepted: 04/01/2024] [Indexed: 04/09/2024] Open
Abstract
The process of wound healing and tissue regeneration involves several key mechanisms to ensure the production of new tissues with similar cellular functions. This study investigates the impact of pectin, a natural polysaccharide, and nebivolol hydrochloride (NBV), a nitric oxide (NO) donor drug, on wound healing. Utilizing ionotropic gelation, NBV-loaded pectin nanoparticles were developed following a 2231 full factorial design. The optimized formulation, determined using Design expert® software, exhibited an encapsulation efficiency percentage of 70.68%, zeta potential of -51.4 mV, and a particle size of 572 nm, characterized by a spherical, discrete morphology. An in vivo study was conducted to evaluate the effectiveness of the optimal formulation in wound healing compared to various controls. The results demonstrated the enhanced ability of the optimal formulation to accelerate wound healing. Moreover, histopathological examination further confirmed the formulation's benefits in tissue proliferation and collagen deposition at the wound site 15 days post-injury. This suggests that the developed formulation not only promotes faster healing but does so with minimal side effects, positioning it as a promising agent for effective wound healing and tissue regeneration.
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Affiliation(s)
- Noha I. Elsherif
- Department of Pharmaceutics and Pharmaceutical Technology, Faculty of Pharmacy, Heliopolis University, Cairo 11785, Egypt
| | - Abdulaziz M. Al-Mahallawi
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo 12613, Egypt
- School of Life and Medical Sciences, University of Hertfordshire Hosted by Global Academic Foundation, New Administrative Capital, Cairo 11835, Egypt
| | - Iman Saad Ahmed
- Department of Pharmaceutics & Pharmaceutical Technology, College of Pharmacy, University of Sharjah, Sharjah 27272, United Arab Emirates
- Research Institute for Medical and Health Sciences, University of Sharjah, Sharjah 27272, United Arab Emirates
| | - Rehab N. Shamma
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo 12613, Egypt
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He X, Wu W, Hu Y, Wu M, Li H, Ding L, Huang S, Fan Y. Visualizing the global trends of peptides in wound healing through an in-depth bibliometric analysis. Int Wound J 2024; 21:e14575. [PMID: 38116897 PMCID: PMC10961903 DOI: 10.1111/iwj.14575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 12/04/2023] [Indexed: 12/21/2023] Open
Abstract
Wound healing is a complicated and multistage biological process for the repair of damaged/injured tissues, which requires intelligent designs to provide comprehensive and convenient treatment. Peptide-based wound dressings have received extensive attention for further development and application due to their excellent biocompatibility and multifunctionality. However, the current lack of intuitive analysis of the development trend and research hotspots of peptides applied in wound healing, as well as detailed elaboration of possible research hotspots, restricted obtaining a comprehensive understanding and development in this field. The present study analysed publications from the Web of Science (WOS) Core Collection database and visualized the hotspots and current trends of peptide research in wound healing. Data between January 1st, 2003, and December 31st, 2022, were collected and subjected to a bibliometric analysis. The countries, institutions, co-authorship, co-citation reference, and co-occurrence of keywords in this subject were examined using VOSviewer and CiteSpace. We provided an intuitive, timely, and logical overview of the development prospects and challenges of peptide application in wound healing and some solutions to the major obstacles, which will help researchers gain insights into the investigation of this promising field.
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Affiliation(s)
- Xinyan He
- Department of Pharmaceutics, Chongqing University Jiangjin Hospital, Chongqing University, Chongqing, China
| | - Wen Wu
- Chongqing key Laboratory of High Active Traditional Chinese Drug Delivery System, Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Yuchen Hu
- School of Biological Engineering and Food, Hubei University of Technology, Wuhan, China
| | - Meiling Wu
- Université de Lorraine, CITHEFOR, Nancy, France
| | - Hong Li
- School of Pharmacy, Guangxi Medical University, Nanning, China
| | - Ling Ding
- Department of Pharmaceutics, Chongqing University Jiangjin Hospital, Chongqing University, Chongqing, China
| | - Shiqin Huang
- Department of Pharmaceutics, Chongqing University Jiangjin Hospital, Chongqing University, Chongqing, China
| | - Ying Fan
- Department of Pharmaceutics, Chongqing University Jiangjin Hospital, Chongqing University, Chongqing, China
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Davari N, Nourmohammadi J, Mohammadi J. Nitric oxide-releasing thiolated starch nanoparticles embedded in gelatin sponges for wound dressing applications. Int J Biol Macromol 2024; 265:131062. [PMID: 38521307 DOI: 10.1016/j.ijbiomac.2024.131062] [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: 11/20/2023] [Revised: 03/03/2024] [Accepted: 03/20/2024] [Indexed: 03/25/2024]
Abstract
This study introduces a novel wound dressing by combining nitric oxide-releasing thiolated starch nanoparticles (NO-TS NPs) with gelatin. First, starch was thiolated (TS), and then its nanoparticles were prepared (TS NPs). Subsequently, NPs were covalently bonded to sodium nitrite to obtain NO-releasing TS NPs (NO-TS-NPs) that were incorporated into gelatin sponges at various concentrations. The resulting spherical TS NPs had a mean size of 85.42 ± 5.23 nm, which rose to 100.73 ± 7.41 nm after bonding with sodium nitrite. FTIR spectroscopy confirmed S-nitrosation on the NO-TS NPs' surface, and morphology analysis showed well-interconnected pores in all sponges. With higher NO-TS NPs content, pore size, porosity, and water uptake increased, while compressive modulus and strength decreased. Composites exhibited antibacterial activity, particularly against E. coli, with enhanced efficacy at higher NPs' concentrations. In vitro release studies demonstrated Fickian diffusion, with faster NO release in sponges containing more NPs. The released NO amounts were non-toxic to fibroblasts, but samples with fewer NO-TS NPs exhibited superior cellular density, cell attachment, and collagen secretion. Considering the results, including favorable mechanical strength, release behavior, antibacterial and cellular properties, gelatin sponges loaded with 2 mg/mL of NO-TS NPs can be suitable for wound dressing applications.
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Affiliation(s)
- Niyousha Davari
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 143951561, Iran
| | - Jhamak Nourmohammadi
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 143951561, Iran.
| | - Javad Mohammadi
- Department of Life Science Engineering, Faculty of New Sciences and Technologies, University of Tehran, Tehran 143951561, Iran
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Wang P, Cai F, Li Y, Yang X, Feng R, Lu H, Bai X, Han J. Emerging trends in the application of hydrogel-based biomaterials for enhanced wound healing: A literature review. Int J Biol Macromol 2024; 261:129300. [PMID: 38216016 DOI: 10.1016/j.ijbiomac.2024.129300] [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: 10/24/2023] [Revised: 01/01/2024] [Accepted: 01/05/2024] [Indexed: 01/14/2024]
Abstract
Currently, there is a rising global incidence of diverse acute and chronic wounds, underscoring the immediate necessity for research and treatment advancements in wound repair. Hydrogels have emerged as promising materials for wound healing due to their unique physical and chemical properties. This review explores the classification and characteristics of hydrogel dressings, innovative preparation strategies, and advancements in delivering and releasing bioactive substances. Furthermore, it delves into the functional applications of hydrogels in wound healing, encompassing areas such as infection prevention, rapid hemostasis and adhesion adaptation, inflammation control and immune regulation, granulation tissue formation, re-epithelialization, and scar prevention and treatment. The mechanisms of action of various functional hydrogels are also discussed. Finally, this article also addresses the current limitations of hydrogels and provides insights into their potential future applications and upcoming innovative designs.
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Affiliation(s)
- Peng Wang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
| | - Feiyu Cai
- Department of Burns and Plastic Surgery & Wound Repair Surgery, the Lanzhou University Second Hospital, Lanzhou, Gansu, China
| | - Yu Li
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
| | - Xuekang Yang
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
| | - Rongqin Feng
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
| | - He Lu
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
| | - Xiaozhi Bai
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China
| | - Juntao Han
- Department of Burns and Cutaneous Surgery, Xijing Hospital, Air Force Medical University, Xi'an, Shaanxi, China.
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Le Thi P, Tran DL, Park KM, Lee S, Oh DH, Park KD. Biocatalytic nitric oxide generating hydrogels with enhanced anti-inflammatory, cell migration, and angiogenic capabilities for wound healing applications. J Mater Chem B 2024; 12:1538-1549. [PMID: 38251728 DOI: 10.1039/d3tb01943h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Although wound healing is a normal physiological process in the human body, it is often impaired by bacterial infections, ischemia, hypoxia, and excess inflammation, which can lead to chronic and non-healing wounds. Recently, injectable hydrogels with controlled nitric oxide (NO) release behaviour have become potential wound healing therapeutic agents due to their excellent biochemical, mechanical, and biological properties. Here, we proposed novel multifunctional NO-releasing hydrogels that could regulate various wound healing processes, including hemostasis, inflammation, cell proliferation and angiogenesis. By incorporating the copper nanoparticles (NPs) in the network of dual enzymatically crosslinked gelatin hydrogels (GH/Cu), NO was in situ produced via the Cu-catalyzed decomposition of endogenous RSNOs available in the blood, thus resolving the intrinsic shortcomings of NO therapies, such as the short storage and release time, as well as the burst and uncontrollable release modes. We demonstrated that the NO-releasing gelatin hydrogels enhanced the proliferation and migration of endothelial cells, while promoting the M2 (anti-inflammatory) polarization of the macrophage. Furthermore, the effects of NO release on angiogenesis were evaluated using an in vitro tube formation assay and in ovo chicken chorioallantoic membrane (CAM) assay, which revealed that GH/Cu hydrogels could significantly facilitate neovascularization, consistent with the in vivo results. Therefore, we suggested that these hydrogel systems would significantly enhance the wound healing process through the synergistic effects of the hydrogels and NO, and hence could be used as advanced wound dressing materials.
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Affiliation(s)
- Phuong Le Thi
- Institute of Applied Materials Science, Vietnam Academy of Science and Technology, No. 1B - TL29 Street, Thanh Loc Ward, 12th District, Ho Chi Minh City 700000, Vietnam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City 700000, Vietnam
| | - Dieu Linh Tran
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, Ho Chi Minh City 700000, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, No. 1A - TL29 Street, Thanh Loc Ward, 12th District, Ho Chi Minh City 700000, Vietnam.
| | - Kyung Min Park
- Department of Bioengineering and Nano-Bioengineering, Incheon National University, 119 Academy-ro, Yeonsu-gu, Incheon 22012, Republic of Korea.
| | - Simin Lee
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea.
| | - Dong Hwan Oh
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea.
| | - Ki Dong Park
- Department of Molecular Science and Technology, Ajou University, Suwon 16499, Republic of Korea.
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Sarkar S, Kumar R, Matson JB. Hydrogels for Gasotransmitter Delivery: Nitric Oxide, Carbon Monoxide, and Hydrogen Sulfide. Macromol Biosci 2024; 24:e2300138. [PMID: 37326828 DOI: 10.1002/mabi.202300138] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/08/2023] [Indexed: 06/17/2023]
Abstract
Gasotransmitters, gaseous signaling molecules including nitric oxide (NO), carbon monoxide (CO), and hydrogen sulfide (H2 S), maintain myriad physiological processes. Low levels of gasotransmitters are often associated with specific problems or diseases, so NO, CO, and H2 S hold potential in treating bacterial infections, chronic wounds, myocardial infarction, ischemia, and various other diseases. However, their clinical applications as therapeutic agents are limited due to their gaseous nature, short half-life, and broad physiological roles. One route toward the greater application of gasotransmitters in medicine is through localized delivery. Hydrogels are attractive biomedical materials for the controlled release of embedded therapeutics as they are typically biocompatible, possess high water content, have tunable mechanical properties, and are injectable in certain cases. Hydrogel-based gasotransmitter delivery systems began with NO, and hydrogels for CO and H2 S have appeared more recently. In this review, the biological importance of gasotransmitters is highlighted, and the fabrication of hydrogel materials is discussed, distinguishing between methods used to physically encapsulate small molecule gasotransmitter donor compounds or chemically tether them to a hydrogel scaffold. The release behavior and potential therapeutic applications of gasotransmitter-releasing hydrogels are also detailed. Finally, the authors envision the future of this field and describe challenges moving forward.
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Affiliation(s)
- Santu Sarkar
- Department of Chemistry, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Rajnish Kumar
- Department of Chemistry, Virginia Tech, Blacksburg, VA, 24061, USA
| | - John B Matson
- Department of Chemistry, Virginia Tech, Blacksburg, VA, 24061, USA
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Lee S, Park CY. Nitric oxide: an old drug but with new horizons in ophthalmology-a narrative review. ANNALS OF TRANSLATIONAL MEDICINE 2023; 11:352. [PMID: 37675299 PMCID: PMC10477639 DOI: 10.21037/atm-22-5634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2022] [Accepted: 04/21/2023] [Indexed: 09/08/2023]
Abstract
Background and Objective Based on basic knowledge and prior research on nitric oxide (NO), the potential of NO for treating eye diseases is reviewed, and the possibility of NO-based eye drops in clinical practice and the future potential of NO in ophthalmology are discussed. Methods A PubMed search was performed for English-language original reports and reviews using the following key words: nitric oxide, eye, ocular, and drug. Key Content and Findings NO is synthesized in the human body by NO synthase (NOS) from L-arginine or through enzyme-dependent reduction of dietary nitrate. Three types of NOS (eNOS, nNOS, and iNOS) are abundantly expressed in the eye under normal physiologic or pathologic conditions. The biological effect of NO in the eye is dose dependent. Low intraocular NO concentrations, produced by eNOS or nNOS, have various cellular effects, including vasodilation, intraocular pressure (IOP) regulation, and neuroprotection. iNOS induced under pathologic ocular conditions produces high NO concentrations in the local environment and mediates tissue inflammation, ocular cell apoptosis, and neurodegeneration. In particular, increased iNOS has been reported in glaucoma and retinal ischemic or degenerative diseases. NO plays a vital role in ocular injury. NO can facilitate ocular surface wound healing while eradicating pathogens such as bacteria and Acanthamoeba in chemical burns or infectious keratitis. Furthermore, NO has antifibrotic activity via the cyclic guanosine monophosphate (cGMP) signaling pathway. NO causes smooth muscle relaxation, which can be used to inhibit myopia progression in children. NO can be a stem cell modulator and may help in treating ocular stem cell disorders. Conclusions Because of its diverse biologic effects, NO can be a key player in regulating ocular inflammation in various ocular diseases, aiding ocular surface wound healing, controlling IOP in glaucoma, alleviating retinal disease, and suppressing myopia progression. Although there remain limitations to the effective use of highly unstable state, gaseous NO, the role of NO in the field of ophthalmology can be greatly expanded through the development of novel NO donors and effective delivery platforms.
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Affiliation(s)
- Soomin Lee
- Department of Ophthalmology, Dongguk University, Ilsan Hospital, Goyang, South Korea
| | - Choul Yong Park
- Department of Ophthalmology, Dongguk University, Ilsan Hospital, Goyang, South Korea
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Shen S, Zhang Z, Huang H, Yang J, Tao X, Meng Z, Ren H, Li X. Copper-induced injectable hydrogel with nitric oxide for enhanced immunotherapy by amplifying immunogenic cell death and regulating cancer associated fibroblasts. Biomater Res 2023; 27:44. [PMID: 37165428 PMCID: PMC10170699 DOI: 10.1186/s40824-023-00389-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 05/04/2023] [Indexed: 05/12/2023] Open
Abstract
BACKGROUND Immunogenic cell death (ICD) induced by different cancer treatments has been widely evaluated to recruit immune cells and trigger the specific antitumor immunity. However, cancer associated fibroblasts (CAFs) can hinder the invasion of immune cells and polarize the recruited monocytes to M2-type macrophages, which greatly restrict the efficacy of immunotherapy (IT). METHODS In this study, an injectable hydrogel induced by copper (Cu) has been designed to contain antibody of PD-L1 and nitric oxide (NO) donor. The therapeutic efficacy of hydrogel was studied in 4T1 cells and CAFs in vitro and 4T1 tumor-bearing mice in vivo. The immune effects on cytotoxic T lymphocytes, dendritic cells (DCs) and macrophages were analyzed by flow cytometry. Enzyme-linked immunosorbent assay, immunofluorescence and transcriptome analyses were also performed to evaluate the underlying mechanism. RESULTS Due to the absorbance of Cu with the near-infrared laser irradiation, the injectable hydrogel exhibits persistent photothermal effect to kill cancer cells. In addition, the Cu of hydrogel shows the Fenton-like reaction to produce reactive oxygen species as chemodynamic therapy, thereby enhancing cancer treatment and amplifying ICD. More interestingly, we have found that the released NO can significantly increase depletion of CAFs and reduce the proportion of M2-type macrophages in vitro. Furthermore, due to the amplify of ICD, injectable hydrogel can effectively increase the infiltration of immune cells and reverse the immunosuppressive tumor microenvironment (TME) by regulating CAFs to enhance the therapeutic efficacy of anti-PD-L1 in vivo. CONCLUSIONS The ion induced self-assembled hydrogel with NO could enhance immunotherapy via amplifying ICD and regulating CAFs. It provides a novel strategy to provoke a robust antitumor immune response for clinical cancer immunotherapy.
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Affiliation(s)
- Shuilin Shen
- School of Pharmaceutical Science, Nanjing Tech University, Nanjing, 211816, Jiangsu, China
| | - Zimeng Zhang
- School of Pharmaceutical Science, Nanjing Tech University, Nanjing, 211816, Jiangsu, China
| | - Haixiao Huang
- School of Pharmaceutical Science, Nanjing Tech University, Nanjing, 211816, Jiangsu, China
| | - Jing Yang
- School of Pharmaceutical Science, Nanjing Tech University, Nanjing, 211816, Jiangsu, China
| | - Xinyue Tao
- School of Pharmaceutical Science, Nanjing Tech University, Nanjing, 211816, Jiangsu, China
| | - Zhengjie Meng
- School of Pharmaceutical Science, Nanjing Tech University, Nanjing, 211816, Jiangsu, China
| | - Hao Ren
- School of Pharmaceutical Science, Nanjing Tech University, Nanjing, 211816, Jiangsu, China.
| | - Xueming Li
- School of Pharmaceutical Science, Nanjing Tech University, Nanjing, 211816, Jiangsu, China.
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Polyacrylamide Hydrogel Containing Calendula Extract as a Wound Healing Bandage: In Vivo Test. Int J Mol Sci 2023; 24:ijms24043806. [PMID: 36835221 PMCID: PMC9968031 DOI: 10.3390/ijms24043806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/11/2022] [Accepted: 12/20/2022] [Indexed: 02/17/2023] Open
Abstract
Hydrogel is a biomaterial widely used in several areas of industry due to its great biocompatibility and adaptability to biological tissues. In Brazil, the Calendula plant is approved by the Ministry of Health as a medicinal herb. It was chosen to be incorporated in the hydrogel formulation because of its anti-inflammatory, antiseptic and healing effects. This study synthesized polyacrylamide hydrogel containing calendula extract and evaluated its efficiency as a bandage for wound healing. The hydrogels were prepared using free radical polymerization and characterized by Scanning Electron Microscopy, swelling analysis and mechanical properties by texturometer. The morphology of the matrices showed large pores and foliaceous structure. In vivo testing, as well as the evaluation of acute dermal toxicity, was conducted using male Wistar rats. The tests indicated efficient collagen fiber production, improved skin repair and no signs of dermal toxicity. Thus, the hydrogel presents compatible properties for the controlled release of calendula extract used as a bandage to promote cicatrization.
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11
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Polymers Enhancing Bioavailability in Drug Delivery. Pharmaceutics 2022; 14:pharmaceutics14102199. [PMID: 36297634 PMCID: PMC9609376 DOI: 10.3390/pharmaceutics14102199] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 10/14/2022] [Indexed: 01/24/2023] Open
Abstract
A drug's bioavailability, i.e., the extent to and rate at which it enters the systemic circulation, thus accessing the site of action, is largely determined by the properties of the drug [...].
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