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Alfano DN, Miller MJ, Bubeck Wardenburg J. Endothelial ADAM10 utilization defines a molecular pathway of vascular injury in mice with bacterial sepsis. J Clin Invest 2023; 133:e168450. [PMID: 37788087 PMCID: PMC10688991 DOI: 10.1172/jci168450] [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: 01/04/2023] [Accepted: 09/28/2023] [Indexed: 10/05/2023] Open
Abstract
The endothelium plays a critical role in the host response to infection and has been a focus of investigation in sepsis. While it is appreciated that intravascular thrombus formation, severe inflammation, and loss of endothelial integrity impair tissue oxygenation during sepsis, the precise molecular mechanisms that lead to endothelial injury remain poorly understood. We demonstrate here that endothelial ADAM10 was essential for the pathogenesis of Staphylococcus aureus sepsis, contributing to α-toxin-mediated (Hla-mediated) microvascular thrombus formation and lethality. As ADAM10 is essential for endothelial development and homeostasis, we examined whether other major human sepsis pathogens also rely on ADAM10-dependent pathways in pathogenesis. Mice harboring an endothelium-specific knockout of ADAM10 were protected against lethal Pseudomonas aeruginosa and Streptococcus pneumoniae sepsis, yet remained fully susceptible to group B streptococci and Candida albicans sepsis. These studies illustrate a previously unknown role for ADAM10 in sepsis-associated endothelial injury and suggest that understanding pathogen-specific divergent host pathways in sepsis may enable more precise targeting of disease.
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Affiliation(s)
| | - Mark J. Miller
- Division of Infectious Diseases, Department of Internal Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
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Kong M, D'Atri D, Bilotta MT, Johnson B, Updegrove TB, Gallardo DL, Machinandiarena F, Wu IL, Constantino MA, Hewitt SM, Tanner K, Fitzgerald DJ, Ramamurthi KS. Cell-specific cargo delivery using synthetic bacterial spores. Cell Rep 2023; 42:111955. [PMID: 36640333 PMCID: PMC10009695 DOI: 10.1016/j.celrep.2022.111955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 11/21/2022] [Accepted: 12/15/2022] [Indexed: 01/06/2023] Open
Abstract
Delivery of cancer therapeutics to non-specific sites decreases treatment efficacy while increasing toxicity. In ovarian cancer, overexpression of the cell surface marker HER2, which several therapeutics target, relates to poor prognosis. We recently reported the assembly of biocompatible bacterial spore-like particles, termed "SSHELs." Here, we modify SSHELs with an affibody directed against HER2 and load them with the chemotherapeutic agent doxorubicin. Drug-loaded SSHELs reduce tumor growth and increase survival with lower toxicity in a mouse tumor xenograft model compared with free drug and with liposomal doxorubicin by preferentially accumulating in the tumor mass. Target cells actively internalize and then traffic bound SSHELs to acidic compartments, whereupon the cargo is released to the cytosol in a pH-dependent manner. We propose that SSHELs represent a versatile strategy for targeted drug delivery, especially in cancer settings.
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Affiliation(s)
- Minsuk Kong
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA; Department of Food Science and Technology, Seoul National University of Science and Technology, Seoul 01811, South Korea
| | - Domenico D'Atri
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Maria Teresa Bilotta
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Bailey Johnson
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Taylor B Updegrove
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Devorah L Gallardo
- Laboratory Animal Sciences Program, Leidos Biomedical Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Federico Machinandiarena
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - I-Lin Wu
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Maira Alves Constantino
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Stephen M Hewitt
- Laboratory of Pathology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Kandice Tanner
- Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | - David J Fitzgerald
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
| | - Kumaran S Ramamurthi
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.
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Zou JT, Jing HM, Yuan Y, Lei LH, Chen ZF, Gou Q, Xiong QS, Zhang XL, Zhao Z, Zhang XK, Zeng H, Zou QM, Zhang JY. Pore-forming alpha-hemolysin efficiently improves the immunogenicity and protective efficacy of protein antigens. PLoS Pathog 2021; 17:e1009752. [PMID: 34288976 PMCID: PMC8294524 DOI: 10.1371/journal.ppat.1009752] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 06/24/2021] [Indexed: 12/19/2022] Open
Abstract
Highly immunogenic exotoxins are used as carrier proteins because they efficiently improve the immunogenicity of polysaccharides. However, their efficiency with protein antigens remains unclear. In the current study, the candidate antigen PA0833 from Pseudomonas aeruginosa was fused to the α-hemolysin mutant HlaH35A from Staphylococcus aureus to form a HlaH35A-PA0833 fusion protein (HPF). Immunization with HPF resulted in increased PA0833-specific antibody titers, higher protective efficacy, and decreased bacterial burden and pro-inflammatory cytokine secretion compared with PA0833 immunization alone. Using fluorescently labeled antigens to track antigen uptake and delivery, we found that HlaH35A fusion significantly improved antigen uptake in injected muscles and antigen delivery to draining lymph nodes. Both in vivo and in vitro studies demonstrated that the increased antigen uptake after immunization with HPF was mainly due to monocyte- and macrophage-dependent macropinocytosis, which was probably the result of HPF binding to ADAM10, the Hla host receptor. Furthermore, a transcriptome analysis showed that several immune signaling pathways were activated by HPF, shedding light on the mechanism whereby HlaH35A fusion improves immunogenicity. Finally, the improvement in immunogenicity by HlaH35A fusion was also confirmed with two other antigens, GlnH from Klebsiella pneumoniae and the model antigen OVA, indicating that HlaH35A could serve as a universal carrier protein to improve the immunogenicity of protein antigens.
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Affiliation(s)
- Jin-Tao Zou
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Hai-Ming Jing
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Yue Yuan
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Lang-Huan Lei
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
- Department of Critical Care Medicine, Children’s Hospital of Chongqing Medical University, Chongqing, PR China
| | - Zhi-Fu Chen
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Qiang Gou
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Qing-Shan Xiong
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Xiao-Li Zhang
- Department of Clinical Hematology, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Zhuo Zhao
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Xiao-Kai Zhang
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Hao Zeng
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
| | - Quan-Ming Zou
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
- * E-mail: (Q-MZ); (J-YZ)
| | - Jin-Yong Zhang
- National Engineering Research Center of Immunological Products & Department of Microbiology and Biochemical Pharmacy, College of Pharmacy, Third Military Medical University, Chongqing, PR China
- * E-mail: (Q-MZ); (J-YZ)
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Abstract
Developments in genome editing offer potential solutions to challenges in agriculture, industry, medicine, and the environment. However, many technologies remain unexploited due to limitations in the use of genetically altered organisms. In this study, we use B. subtilis spores to explore the possibility of bioengineering organisms while leaving their genome intact. Taking advantage of the differential expression between the mother cell and the fore-spore compartments during sporulation, we created plasmids programmed to modify the spore phenotype from the mother cell compartment, but to "self-digest" in the fore-spore. At the end of sporulation, the mother cell undergoes lysis and releases the phenotypically engineered, genetically unaltered spores. Using this approach, we demonstrated the potential to express foreign proteins in B. subtilis spores without genome alterations by producing spores expressing GFP in their protective coats, where approximately 90% of the spore population had no detectable plasmid or chromosome alterations. In a separate demonstration, we programmed KinA overexpression during vegetative growth to artificially induce sporulation, and also obtained spores with nearly 90% of them free of detectable plasmid. Artificial induction of sporulation could potentially simplify the bioprocess for industrial spore production, as it reduces the number of steps involved. Overall, these findings demonstrate the potential to create genetically intact bioengineered organisms.
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Affiliation(s)
- Juan F. Quijano
- Department of Biological Sciences, Columbia University, New York, 10027, United States
- Department of Biological Sciences and Department of Physics, Columbia University, New York, 10027, United States
| | - Ozgur Sahin
- Department of Biological Sciences, Columbia University, New York, 10027, United States
- Department of Biological Sciences and Department of Physics, Columbia University, New York, 10027, United States
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Applications of Bacillus subtilis Spores in Biotechnology and Advanced Materials. Appl Environ Microbiol 2020; 86:AEM.01096-20. [PMID: 32631858 DOI: 10.1128/aem.01096-20] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The bacterium Bacillus subtilis has long been an important subject for basic studies. However, this organism has also had industrial applications due to its easy genetic manipulation, favorable culturing characteristics for large-scale fermentation, superior capacity for protein secretion, and generally recognized as safe (GRAS) status. In addition, as the metabolically dormant form of B. subtilis, its spores have attracted great interest due to their extreme resistance to many environmental stresses, which makes spores a novel platform for a variety of applications. In this review, we summarize both conventional and emerging applications of B. subtilis spores, with a focus on how their unique characteristics have led to innovative applications in many areas of technology, including generation of stable and recyclable enzymes, synthetic biology, drug delivery, and material sciences. Ultimately, this review hopes to inspire the scientific community to leverage interdisciplinary approaches using spores to address global concerns about food shortages, environmental protection, and health care.
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Lee JE, Kye YC, Park SM, Shim BS, Yoo S, Hwang E, Kim H, Kim SJ, Han SH, Park TS, Park BC, Yun CH. Bacillus subtilis spores as adjuvants against avian influenza H9N2 induce antigen-specific antibody and T cell responses in White Leghorn chickens. Vet Res 2020; 51:68. [PMID: 32448402 PMCID: PMC7245620 DOI: 10.1186/s13567-020-00788-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 04/16/2020] [Indexed: 01/06/2023] Open
Abstract
Low-pathogenicity avian influenza H9N2 remains an endemic disease worldwide despite continuous vaccination, indicating the need for an improved vaccine strategy. Bacillus subtilis (B. subtilis), a gram-positive and endospore-forming bacterium, is a non-pathogenic species that has been used in probiotic formulations for both animals and humans. The objective of the present study was to elucidate the effect of B. subtilis spores as adjuvants in chickens administered inactivated avian influenza virus H9N2. Herein, the adjuvanticity of B. subtilis spores in chickens was demonstrated by enhancement of H9N2 virus-specific IgG responses. B. subtilis spores enhanced the proportion of B cells and the innate cell population in splenocytes from chickens administered both inactivated H9N2 and B. subtilis spores (Spore + H9N2). Furthermore, the H9N2 and spore administration induced significantly increased expression of the pro-inflammatory cytokines IL-1β and IL-6 compared to that in the H9N2 only group. Additionally, total splenocytes from chickens immunized with inactivated H9N2 in the presence or absence of B. subtilis spores were re-stimulated with inactivated H9N2. The subsequent results showed that the extent of antigen-specific CD4+ and CD8+ T cell proliferation was higher in the Spore + H9N2 group than in the group administered only H9N2. Taken together, these data demonstrate that B. subtilis spores, as adjuvants, enhance not only H9N2 virus-specific IgG but also CD4+ and CD8+ T cell responses, with an increase in pro-inflammatory cytokine production. This approach to vaccination with inactivated H9N2 together with a B. subtilis spore adjuvant in chickens produces a significant effect on antigen-specific antibody and T cell responses against avian influenza virus.
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Affiliation(s)
- Ji Eun Lee
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Yoon-Chul Kye
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea
| | - Sung-Moo Park
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea.,Center for Food and Bioconvergence, Seoul National University, Seoul, Republic of Korea
| | | | - Sungsik Yoo
- Choong-Ang Vaccine Laboratory, Daejeon, Republic of Korea
| | - Eunmi Hwang
- Department of Biotechnology, Hoseo University, Asan, Chungcheongnam-do, Republic of Korea
| | - Hyungkuen Kim
- Department of Biotechnology, Hoseo University, Asan, Chungcheongnam-do, Republic of Korea
| | - Sung-Jo Kim
- Department of Biotechnology, Hoseo University, Asan, Chungcheongnam-do, Republic of Korea
| | - Seung Hyun Han
- Department of Oral Microbiology and Immunology, DRI and BK21 Program, School of Dentistry, Seoul National University, Seoul, Republic of Korea
| | - Tae Sub Park
- Graduate School of International Agricultural Technology, Institute of Green-Bio Science and Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, Republic of Korea
| | - Byung-Chul Park
- Graduate School of International Agricultural Technology, Institute of Green-Bio Science and Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, Republic of Korea.
| | - Cheol-Heui Yun
- Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University, Seoul, Republic of Korea. .,Center for Food and Bioconvergence, Seoul National University, Seoul, Republic of Korea. .,Graduate School of International Agricultural Technology, Institute of Green-Bio Science and Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, Republic of Korea.
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Evaluation of immune response to Bacillus subtilis spores expressing Clonorchis sinensis serpin3. Parasitology 2020; 147:1080-1087. [PMID: 32404215 DOI: 10.1017/s0031182020000797] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Clonorchis sinensis (C. sinensis) is one of the most serious food-borne parasites, which can lead to liver fibrosis or cholangiocarcinoma. Effective measures for clonorchiasis prevention are still urgently needed. Bacillus subtilis (B. subtilis) is an effective antigen delivery platform for oral vaccines. Chonorchis sinensis serpin (CsSerpin) was proved to be potential vaccine candidates. In this study, CsSerpin3 was displayed on the surface of B. subtilis spore and recombinant spores were orally administrated to BALB/C mice. CsSerpin3-specific IgA levels in faecal, bile and intestinal mucous increased at 4-8 weeks after the first administration compared with those in control groups. The mucus production and the number of goblet cells in intestinal mucosa elevated in B.s-CotC-CsSerpin3 (CotC, coat protein of B. subtilis spore) spores treated group compared to those in blank control. No significant difference in the activities of glutamic-pyruvic transaminase/ alanine aminotransferase and glutamic oxalacetic transaminase/aspartate aminotransferase were observed between groups. There was no side effect inflammation and observable pathological damage in the liver tissue of mice after administration. Moreover, collagen deposition and Ishak score were statistically reduced in B.s-CotC-CsSerpin3 spores treated mice. In conclusion, B. subtilis spores displaying CsSerpin3 could be investigated further as an oral vaccine against clonorchiasis.
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Jing H, Wang Y, Desai PR, Ramamurthi KS, Das S. Nanovesicles Versus Nanoparticle-Supported Lipid Bilayers: Massive Differences in Bilayer Structures and in Diffusivities of Lipid Molecules and Nanoconfined Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:2702-2708. [PMID: 30685976 PMCID: PMC7464572 DOI: 10.1021/acs.langmuir.8b03805] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
We carry out molecular dynamics (MD) simulations to compare the equilibrium architecture and properties of nanoparticle-supported lipid bilayers (NPSLBLs) with the free vesicles of similar dimensions. Three key differences emerge. First, we witness that for a free vesicle, a much larger number of lipid molecules occupy the outer layer as compared to the inner layer; on the other hand, for the NPSLBL the number of lipid molecules occupying the inner and outer layers is identical. Second, we witness that the diffusivities of the lipid molecules occupying both the inner and the outer layers of the free vesicles are identical, whereas for the NPSLBLs the diffusivity of the lipid molecules in the outer layer is more than twice the diffusivity of the lipid molecules in the inner layer. Finally, the NPSLBLs entrap nanoscopic thin water film between the inner lipid layer and the NP and the diffusivity of this water film is nearly 1 order of magnitude smaller than the diffusivity of the bulk water; on the other hand, the water inside the free vesicles has a diffusivity that is only slightly lower than that of the bulk water. Our findings, possibly the first probing the atomistic details of the NPSLBLs, are anticipated to shed light on the properties of this important nanomaterial with applications in a large number of disciplines ranging from drug and gene delivery to characterizing curvature-sensitive molecules.
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Affiliation(s)
- Haoyuan Jing
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742
| | - Yanbin Wang
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742
| | - Parth Rakesh Desai
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742
| | - Kumaran S. Ramamurthi
- Laboratory of Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Siddhartha Das
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742
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