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Wang LL, Tuohy S, Xu KL, Nace A, Yang R, Zheng Y, Burdick JA, Cotsarelis G. Local and Sustained Baricitinib Delivery to the Skin through Injectable Hydrogels Containing Reversible Thioimidate Adducts. Adv Healthc Mater 2024; 13:e2303256. [PMID: 38207170 DOI: 10.1002/adhm.202303256] [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: 09/25/2023] [Revised: 11/30/2023] [Indexed: 01/13/2024]
Abstract
Janus kinase (JAK) inhibitors are approved for many dermatologic disorders, but their use is limited by systemic toxicities including serious cardiovascular events and malignancy. To overcome these limitations, injectable hydrogels are engineered for the local and sustained delivery of baricitinib, a representative JAK inhibitor. Hydrogels are formed via disulfide crosslinking of thiolated hyaluronic acid macromers. Dynamic thioimidate bonds are introduced between the thiolated hyaluronic acid and nitrile-containing baricitinib for drug tethering, which is confirmed with 1H and 13C nuclear magnetic resonance (NMR). Release of baricitinib is tunable over six weeks in vitro and active in inhibiting JAK signaling in a cell line containing a luciferase reporter reflecting interferon signaling. For in vivo activity, baricitinib hydrogels or controls are injected intradermally into an imiquimod-induced mouse model of psoriasis. Imiquimod increases epidermal thickness in mice, which is unaffected when treated with baricitinib or hydrogel alone. Treatment with baricitinib hydrogels suppresses the increased epidermal thickness in mice treated with imiquimod, suggesting that the sustained and local release of baricitinib is important for a therapeutic outcome. This study is the first to utilize a thioimidate chemistry to deliver JAK inhibitors to the skin through injectable hydrogels, which has translational potential for treating inflammatory disorders.
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Affiliation(s)
- Leo L Wang
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, 1053 Biomedical Research Building, 421 Curie Blvd, Philadelphia, PA, 19104, USA
| | - Spencer Tuohy
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, 1053 Biomedical Research Building, 421 Curie Blvd, Philadelphia, PA, 19104, USA
- Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, 220 South 33rd Street, 107 Towne Building, Philadelphia, PA, 19104-6391, USA
| | - Karen L Xu
- Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, 220 South 33rd Street, 107 Towne Building, Philadelphia, PA, 19104-6391, USA
- BioFrontiers Institute and Department of Chemical and Biological Engineering, College of Engineering and Applied Science, University of Colorado Boulder, 1111 Engineering Dr, Boulder, CO, 80309, USA
| | - Arben Nace
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, 1053 Biomedical Research Building, 421 Curie Blvd, Philadelphia, PA, 19104, USA
| | - Ruifeng Yang
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, 1053 Biomedical Research Building, 421 Curie Blvd, Philadelphia, PA, 19104, USA
| | - Ying Zheng
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, 1053 Biomedical Research Building, 421 Curie Blvd, Philadelphia, PA, 19104, USA
| | - Jason A Burdick
- Department of Bioengineering, School of Engineering and Applied Science, University of Pennsylvania, 220 South 33rd Street, 107 Towne Building, Philadelphia, PA, 19104-6391, USA
- BioFrontiers Institute and Department of Chemical and Biological Engineering, College of Engineering and Applied Science, University of Colorado Boulder, 1111 Engineering Dr, Boulder, CO, 80309, USA
| | - George Cotsarelis
- Department of Dermatology, Perelman School of Medicine, University of Pennsylvania, 1053 Biomedical Research Building, 421 Curie Blvd, Philadelphia, PA, 19104, USA
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Sahiner M, Yilmaz AS, Ayyala RS, Sahiner N. Carboxymethyl Chitosan Microgels for Sustained Delivery of Vancomycin and Long-Lasting Antibacterial Effects. Gels 2023; 9:708. [PMID: 37754390 PMCID: PMC10529976 DOI: 10.3390/gels9090708] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 08/20/2023] [Accepted: 08/28/2023] [Indexed: 09/28/2023] Open
Abstract
Carboxymethyl chitosan (CMCh) is a unique polysaccharide with functional groups that can develop positive and negative charges due to the abundant numbers of amine and carboxylic acid groups. CMCh is widely used in different areas due to its excellent biocompatibility, biodegradability, water solubility, and chelating ability. CMCh microgels were synthesized in a microemulsion environment using divinyl sulfone (DVS) as a crosslinking agent. CMCh microgel with tailored size and zeta potential values were obtained in a single stem by crosslinking CMCh in a water-in-oil environment. The spherical microgel structure is confirmed by SEM analysis. The sizes of CMCh microgels varied from one micrometer to tens of micrometers. The isoelectric point of CMCh microgels was determined as pH 4.4. Biocompatibility of CMCh microgels was verified on L929 fibroblasts with 96.5 ± 1.5% cell viability at 1 mg/mL concentration. The drug-carrying abilities of CMCh microgels were evaluated by loading Vancomycin (Van) antibiotic as a model drug. Furthermore, the antibacterial activity efficiency of Van-loaded CMCh microgels (Van@CMCh) was investigated. The MIC values of the released drug from Van@CMCh microgels were found to be 68.6 and 7.95 µg/mL against E. coli and S. aureus, respectively, at 24 h contact time. Disk diffusion tests confirmed that Van@CMCh microgels, especially for Gram-positive (S. aureus) bacteria, revealed long-lasting inhibitory effects on bacteria growth up to 72 h.
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Affiliation(s)
- Mehtap Sahiner
- Department of Bioengineering, Faculty of Engineering, Canakkale, Onsekiz Mart University Terzioglu Campus, Canakkale 17100, Turkey;
- Department of Chemical, Biological and Materials Engineering, University of South Florida, Tampa, FL 33620, USA;
| | - Aynur S. Yilmaz
- Department of Chemical, Biological and Materials Engineering, University of South Florida, Tampa, FL 33620, USA;
- Department of Chemistry, Faculty of Sciences, and Nanoscience and Technology Research and Application Center (NANORAC), Canakkale Onsekiz Mart University Terzioglu Campus, Canakkale 17100, Turkey
| | - Ramesh S. Ayyala
- Department of Ophthalmology, Morsani College of Medicine, University of South Florida Eye Institute, 12901 Bruce B Down Blvd., MDC 21, Tampa, FL 33612, USA;
| | - Nurettin Sahiner
- Department of Chemical, Biological and Materials Engineering, University of South Florida, Tampa, FL 33620, USA;
- Department of Chemistry, Faculty of Sciences, and Nanoscience and Technology Research and Application Center (NANORAC), Canakkale Onsekiz Mart University Terzioglu Campus, Canakkale 17100, Turkey
- Department of Ophthalmology, Morsani College of Medicine, University of South Florida Eye Institute, 12901 Bruce B Down Blvd., MDC 21, Tampa, FL 33612, USA;
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