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Furuta A, Coleman M, Casares R, Seepersaud R, Orvis A, Brokaw A, Quach P, Nguyen S, Sweeney E, Sharma K, Wallen G, Sanghavi R, Mateos-Gil J, Cuerva JM, Millán A, Rajagopal L. CD1 and iNKT cells mediate immune responses against the GBS hemolytic lipid toxin induced by a non-toxic analog. PLoS Pathog 2023; 19:e1011490. [PMID: 37384812 DOI: 10.1371/journal.ppat.1011490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 06/14/2023] [Indexed: 07/01/2023] Open
Abstract
Although hemolytic lipids have been discovered from many human pathogens including Group B Streptococcus (GBS), strategies that neutralize their function are lacking. GBS is a leading cause of pregnancy-associated neonatal infections, and adult GBS infections are on the rise. The GBS hemolytic lipid toxin or granadaene, is cytotoxic to many immune cells including T and B cells. We previously showed that mice immunized with a synthetic nontoxic analog of granadaene known as R-P4 had reduced bacterial dissemination during systemic infection. However, mechanisms important for R-P4 mediated immune protection was not understood. Here, we show that immune serum from R-P4-immunized mice facilitate GBS opsonophagocytic killing and protect naïve mice from GBS infection. Further, CD4+ T cells isolated from R-P4-immunized mice proliferated in response to R-P4 stimulation in a CD1d- and iNKT cell-dependent manner. Consistent with these observations, R-P4 immunized mice lacking CD1d or CD1d-restricted iNKT cells exhibit elevated bacterial burden. Additionally, adoptive transfer of iNKT cells from R-P4 vaccinated mice significantly reduced GBS dissemination compared to adjuvant controls. Finally, maternal R-P4 vaccination provided protection against ascending GBS infection during pregnancy. These findings are relevant in the development of therapeutic strategies targeting lipid cytotoxins.
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Affiliation(s)
- Anna Furuta
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
| | - Michelle Coleman
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Raquel Casares
- Department of Organic Chemistry, University of Granada, Granada, Spain
| | - Ravin Seepersaud
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Austyn Orvis
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Alyssa Brokaw
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
| | - Phoenicia Quach
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Shayla Nguyen
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Erin Sweeney
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Kavita Sharma
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Grace Wallen
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
| | - Rhea Sanghavi
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
| | - Jaime Mateos-Gil
- Department of Organic Chemistry, University of Granada, Granada, Spain
| | | | - Alba Millán
- Department of Organic Chemistry, University of Granada, Granada, Spain
| | - Lakshmi Rajagopal
- Center for Global Infectious Disease Research, Seattle Children's Research Institute, Seattle, Washington, United States of America
- Department of Global Health, University of Washington, Seattle, Washington, United States of America
- Department of Pediatrics, University of Washington, Seattle, Washington, United States of America
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Mateos-Gil J, Mondal A, Castiñeira Reis M, Feringa BL. Synthesis and Functionalization of Allenes by Direct Pd-Catalyzed Organolithium Cross-Coupling. Angew Chem Int Ed Engl 2020; 59:7823-7829. [PMID: 32078230 DOI: 10.1002/anie.201913132] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 01/30/2020] [Indexed: 02/06/2023]
Abstract
A palladium-catalyzed cross-coupling between in situ generated allenyl/propargyl-lithium species and aryl bromides to yield highly functionalized allenes is reported. The direct and selective formation of allenic products preventing the corresponding isomeric propargylic product is accomplished by the choice of SPhos or XPhos based Pd catalysts. The methodology avoids the prior transmetalation to other transition metals or reverse approaches that required prefunctionalization of substrates with leaving groups, resulting in a fast and efficient approach for the synthesis of tri- and tetrasubstituted allenes. Experimental and theoretical studies on the mechanism show catalyst control of selectivity in this allene formation.
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Affiliation(s)
- Jaime Mateos-Gil
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands
| | - Anirban Mondal
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands
| | - Marta Castiñeira Reis
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands
| | - Ben L Feringa
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747AG, Groningen, The Netherlands
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Mateos-Gil J, Calbo J, Rodríguez-Pérez L, Ángeles Herranz M, Ortí E, Martín N. Carbon Nanotubes Conjugated with Triazole-Based Tetrathiafulvalene-Type Receptors for C 60 Recognition. Chempluschem 2020; 84:730-739. [PMID: 31944013 DOI: 10.1002/cplu.201900078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/04/2019] [Indexed: 11/09/2022]
Abstract
Fullerene receptors prepared by a twofold CuI -catalyzed azide-alkyne cycloaddition reaction with π-extended tetrathiafulvalene (exTTF) have been covalently linked to single-walled carbon nanotubes and multi-walled carbon nanotubes. The nanoconjugates obtained were characterized by several analytical, spectroscopic and microscopic techniques (TEM, FTIR, Raman, TGA and XPS), and evaluated as C60 receptors by using UV-Vis spectroscopy. The complexation between the exTTF-triazole receptor in the free state and C60 was also studied by UV-Vis and 1 H NMR titrations, and compared with analogous triazole-based tweezer-type receptors containing the electron-acceptor 11,11,12,12-tetracyano-9,10-anthraquinodimethane and benzene rings instead of exTTF motifs, providing in all cases very similar values for the association constant (log Ka ≈3.0-3.1). Theoretical density functional theory calculations demonstrated that the enhanced interaction between the host and the guest upon increasing the size of the π-conjugated arms of the tweezer is compensated by an increase in the energy penalty needed to distort the geometry of the host to wrap C60 .
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Affiliation(s)
- Jaime Mateos-Gil
- Departamento de Química Orgánica Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain.,Current address: Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Joaquín Calbo
- Instituto de Ciencia Molecular, Universidad de Valencia, 46980, Paterna, Spain
| | - Laura Rodríguez-Pérez
- Departamento de Química Orgánica Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Ma Ángeles Herranz
- Departamento de Química Orgánica Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Enrique Ortí
- Instituto de Ciencia Molecular, Universidad de Valencia, 46980, Paterna, Spain
| | - Nazario Martín
- Departamento de Química Orgánica Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain.,IMDEA-Nanociencia c/Faraday 9, Campus Cantoblanco, 28049, Madrid, Spain
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Mateos-Gil J, Rodríguez-Pérez L, Moreno Oliva M, Katsukis G, Romero-Nieto C, Herranz MÁ, Guldi DM, Martín N. Electroactive carbon nanoforms: a comparative study via sequential arylation and click chemistry reactions. Nanoscale 2015; 7:1193-1200. [PMID: 25488718 DOI: 10.1039/c4nr04365k] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The reactivity of several carbon nanoforms (CNFs), single-walled carbon nanotubes (SWCNTs), multi-walled carbon nanotubes (MWCNTs) and graphene, has been investigated through a combination of arylation and click chemistry Cu(I)-mediated azide-alkyne cycloaddition (CuAAC) reactions. The approach is based on the incorporation of electroactive π-extended tetrathiafulvalene (exTTF) units into the triazole linkers to modulate the electronic properties of the obtained conjugates. The introduction of strain, by bending the planar graphene sheet into a 3D carbon framework, is responsible for the singular reactivity observed in carbon nanotubes. The formed nanoconjugates were fully characterized by analytical, spectroscopic, and microscopic techniques (TGA, FTIR, Raman, UV-Vis-NIR, cyclic voltammetry, TEM and XPS). In the case of SWCNT conjugates, where the functionalization degree is higher, a series of steady-state and time resolved spectroscopy experiments revealed a photoinduced electron transfer from the exTTF unit to the electron-accepting SWCNT.
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Affiliation(s)
- Jaime Mateos-Gil
- Departamento de Química Orgánica I, Facultad de Química, Universidad Complutense, E-28040 Madrid, Spain.
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