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Li J, Fan J, Gao Y, Huang S, Huang D, Li J, Wang X, Santos HA, Shen P, Xia B. Porous Silicon Nanocarriers Boost the Immunomodulation of Mitochondria-Targeted Bovine Serum Albumins on Macrophage Polarization. ACS NANO 2023; 17:1036-1053. [PMID: 36598186 PMCID: PMC9878978 DOI: 10.1021/acsnano.2c07439] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 12/29/2022] [Indexed: 05/31/2023]
Abstract
The development of nanosystems with intrinsic immunomodulatory effects on macrophage polarization is important for the macrophage-targeted immunotherapy. Here, mitochondria-targeted bovine serum albumins (BSAs) via the conjugation of fluorescent, lipophilic, and cationic rhodamine 110 molecules can efficiently enhance the gene expression of the proinflammatory phenotype of macrophages and correspondingly inhibit the gene expression of their anti-inflammatory phenotype. On this basis, porous silicon nanocarriers can further boost the immunomodulation of these mitochondria-targeted BSAs in vitro or in vivo, accompanied by the secretion of proinflammatory mediators including tumor necrosis factor α, nitric oxide, and reactive oxygen species (ROS). Meanwhile, BSA coatings can also improve the biocompatibility of porous silicon nanoparticulate cores on macrophages. Finally, the mechanism investigations demonstrate that porous silicon nanocarriers can efficiently deliver mitochondria-targeted BSA into macrophages to generate mitochondrial ROS via the interference with mitochondrial respiratory chains, which can further trigger the downstream signaling transduction pathways for the proinflammatory transition. Considering the good biosafety and versatile loading capability, this developed porous silicon@BSA nanosystem with a strong proinflmmatory regulatory effect has important potential on the combinatorial chemoimmunotherapy against cancer or viral/bacterial-related infectious diseases.
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Affiliation(s)
- Jialiang Li
- College
of Science, Nanjing Forestry University, Nanjing210037, China
| | - Jiqiang Fan
- State
Key Laboratory of Pharmaceutical Biotechnology and The Comprehensive
Cancer Center, Nanjing Drum Tower Hospital, The Affiliated Hospital
of Nanjing University Medical School, Nanjing
University, Nanjing210023, China
| | - Yan Gao
- College
of Science, Nanjing Forestry University, Nanjing210037, China
| | - Shuodan Huang
- College
of Science, Nanjing Forestry University, Nanjing210037, China
| | - Di Huang
- College
of Science, Nanjing Forestry University, Nanjing210037, China
| | - Jiachen Li
- Department
of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AVGroningen, The Netherlands
- W.
J. Kolff Institute for Biomedical Engineering and Materials Science,
University Medical Center Groningen, University
of Groningen, Antonius
Deusinglaan 1, 9713 AVGroningen, The Netherlands
| | - Xiaoyu Wang
- College
of Science, Nanjing Forestry University, Nanjing210037, China
| | - Hélder A. Santos
- Department
of Biomedical Engineering, University Medical Center Groningen, University of Groningen, Antonius Deusinglaan 1, 9713 AVGroningen, The Netherlands
- W.
J. Kolff Institute for Biomedical Engineering and Materials Science,
University Medical Center Groningen, University
of Groningen, Antonius
Deusinglaan 1, 9713 AVGroningen, The Netherlands
| | - Pingping Shen
- Department
of Geriatric Medicine, The Second Affiliated
Hospital and Yuying Children’s Hospital of Wenzhou Medical
University, Wenzhou325027, China
- State
Key Laboratory of Pharmaceutical Biotechnology and The Comprehensive
Cancer Center, Nanjing Drum Tower Hospital, The Affiliated Hospital
of Nanjing University Medical School, Nanjing
University, Nanjing210023, China
| | - Bing Xia
- College
of Science, Nanjing Forestry University, Nanjing210037, China
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Gan BH, Siriwardena TN, Javor S, Darbre T, Reymond JL. Fluorescence Imaging of Bacterial Killing by Antimicrobial Peptide Dendrimer G3KL. ACS Infect Dis 2019; 5:2164-2173. [PMID: 31618574 DOI: 10.1021/acsinfecdis.9b00299] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We recently discovered that peptide dendrimers such as G3KL ((KL)8(KKL)4(KKL)2KKL, K = branching l-lysine) exert strong activity against Gram-negative bacteria including Pseudomonas aeruginosa, Acinetobacter baumannii, and Escherichia coli. Herein, we report a detailed mechanistic study using fluorescence labeled analogs bearing fluorescein (G3KL-Fluo) or dansyl (G3KL-Dansyl), which show a similar bioactivity profile as G3KL. Imaging bacterial killing by super-resolution stimulated emission depletion (STED) microscopy, time-lapse imaging, and transmission electron microscopy (TEM) reveals that the dendrimer localizes at the bacterial membrane, induces membrane depolarization and permeabilization, and destroys the outer leaflet and the inner membrane. G3KL accumulates in bacteria against which it is active; however, it only weakly penetrates into eukaryotic cells without inducing significant toxicity. G3KL furthermore binds to lipopolysaccharide (LPS) and inhibits the LPS induced release of TNF-α by macrophages, similarly to polymyxin B. Taken together, these experiments show that G3KL behaves as a potent membrane disruptive antimicrobial peptide.
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Affiliation(s)
- Bee-Ha Gan
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Thissa N. Siriwardena
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Sacha Javor
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Tamis Darbre
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
| | - Jean-Louis Reymond
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
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