1
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Li X, Chen Y, Wang R, Lu E, Luo K, Sha X. Enhancement of cancer immunotherapy using CRT valgus tumor cell membranes coated bacterial whole peptidoglycan combined with radiotherapy. Int J Pharm 2023; 646:123430. [PMID: 37742823 DOI: 10.1016/j.ijpharm.2023.123430] [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: 07/09/2023] [Revised: 08/23/2023] [Accepted: 09/18/2023] [Indexed: 09/26/2023]
Abstract
Immunotherapy has achieved some success in preclinical and clinical studies, but the immunosuppressive tumor microenvironment (TME) leads to a low response rate of this therapy. In this paper, we describe a calreticulin (CRT) valgus CT-26 tumor cell membranes-coated bacterial whole peptidoglycan (WPG) from P. aeruginosa (CPW/SR) with a high rate of the STING agonist loading. In the construct, WPG from P. aeruginosa (P.WPG) was used as a carrier with the immunoadjuvant function while synergistically promoting the maturation of dendritic cells (DCs) through the delivery of the STING agonist SR-717. CRT valgus tumor cell membranes were identified and internalized by DCs via CRT on the surface. In addition, this construct was able to reverse the immunosuppressive TME in vivo and achieve synergies with radiotherapy by creating a personalized tumor vaccine, therefore achieving more resultful antitumor efficacy. In conclusion, CPW/SR constructed in this paper provides a new approach for achieving efficient cancer immunotherapy and combination therapy.
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Affiliation(s)
- Xinhong Li
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yiting Chen
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Rui Wang
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Enhao Lu
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Kuankuan Luo
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Xianyi Sha
- Key Laboratory of Smart Drug Delivery, Ministry of Education, Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, China; The Institutes of Integrative Medicine of Fudan University, Shanghai, China.
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2
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Le HT, Liu M, Grimes CL. Application of bioanalytical and computational methods in decoding the roles of glycans in host-pathogen interactions. Curr Opin Chem Biol 2023; 74:102301. [PMID: 37080155 PMCID: PMC10296625 DOI: 10.1016/j.cbpa.2023.102301] [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: 12/05/2022] [Revised: 03/09/2023] [Accepted: 03/14/2023] [Indexed: 04/22/2023]
Abstract
Host-pathogen interactions (HPIs) are complex processes that require tight regulation. A common regulatory mechanism of HPIs is through glycans of either host cells or pathogens. Due to their diverse sequences, complex structures, and conformations, studies of glycans require highly sensitive and powerful tools. Recent improvements in technology have enabled the application of many bioanalytical techniques and modeling methods to investigate glycans and their mechanisms in HPIs. This mini-review highlights how these advances have been used to understand the role glycans play in HPIs in the past 2 years.
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Affiliation(s)
- Ha T Le
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Min Liu
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA
| | - Catherine L Grimes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE, USA; Department of Biological Sciences, University of Delaware, Newark, DE, USA.
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3
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Li L, Ng AWR, Adamson C, Hayashi H, Li C, Lim H, Qiao Y. Chemoenzymatic Probes Reveal Peptidoglycan Recognition and Uptake Mechanisms in Candida albicans. ACS Chem Biol 2022; 17:2538-2550. [PMID: 35968762 DOI: 10.1021/acschembio.2c00468] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Candida albicans, the major fungal pathogen in humans, is under the strong influence of bacterial peptidoglycan fragments to undergo the yeast-to-hyphae transition, a key virulent step in C. albicans pathogenesis and infections. However, due to the synthetic difficulties of obtaining peptidoglycan fragments for biological studies, mechanistic details of how C. albicans recognizes and uptakes these peptidoglycan fragments have not been well elucidated. Notably, previous works have solely focused on the synthetic peptidoglycan ligand, muramyl dipeptide (MDP), despite its poor hyphal-inducing activity in C. albicans. In this work, we isolated and purified natural peptidoglycan fragments via enzymatic degradation of bacteria cell wall sacculi and chemoenzymatically installed a series of functional d-amino acids into the natural muropeptide, creating peptidoglycan probes that bear photoaffinity, bio-orthogonal, or fluorescent functionality. Using these chemoenzymatic peptidoglycan probes, we established that natural peptidoglycan fragments, which are potent hyphal-inducers, interact with the C. albicans Cyr1 sensor protein in the in-gel fluorescence assay as well as in in vitro pulldown studies. Moreover, we established that bacterial peptidoglycan probes enter C. albicans cells via an energy-dependent endocytic process.
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Affiliation(s)
- Lanxin Li
- Division of Chemistry and Biological Chemistry (CBC), School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, S637371 Singapore
| | - Allan Wee Ren Ng
- Division of Chemistry and Biological Chemistry (CBC), School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, S637371 Singapore
| | - Christopher Adamson
- Division of Chemistry and Biological Chemistry (CBC), School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, S637371 Singapore
| | - Hirohito Hayashi
- Division of Chemistry and Biological Chemistry (CBC), School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, S637371 Singapore
| | - Chenyu Li
- Division of Chemistry and Biological Chemistry (CBC), School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, S637371 Singapore
| | - Huiyi Lim
- Division of Chemistry and Biological Chemistry (CBC), School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, S637371 Singapore
| | - Yuan Qiao
- Division of Chemistry and Biological Chemistry (CBC), School of Physical and Mathematical Sciences (SPMS), Nanyang Technological University, 21 Nanyang Link, S637371 Singapore
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4
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Kienes I, Johnston EL, Bitto NJ, Kaparakis-Liaskos M, Kufer TA. Bacterial subversion of NLR-mediated immune responses. Front Immunol 2022; 13:930882. [PMID: 35967403 PMCID: PMC9367220 DOI: 10.3389/fimmu.2022.930882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 07/04/2022] [Indexed: 11/23/2022] Open
Abstract
Members of the mammalian Nod-like receptor (NLR) protein family are important intracellular sensors for bacteria. Bacteria have evolved under the pressure of detection by host immune sensing systems, leading to adaptive subversion strategies to dampen immune responses for their benefits. These include modification of microbe-associated molecular patterns (MAMPs), interception of innate immune pathways by secreted effector proteins and sophisticated instruction of anti-inflammatory adaptive immune responses. Here, we summarise our current understanding of subversion strategies used by bacterial pathogens to manipulate NLR-mediated responses, focusing on the well-studied members NOD1/2, and the inflammasome forming NLRs NLRC4, and NLRP3. We discuss how bacterial pathogens and their products activate these NLRs to promote inflammation and disease and the range of mechanisms used by bacterial pathogens to evade detection by NLRs and to block or dampen NLR activation to ultimately interfere with the generation of host immunity. Moreover, we discuss how bacteria utilise NLRs to facilitate immunotolerance and persistence in the host and outline how various mechanisms used to attenuate innate immune responses towards bacterial pathogens can also aid the host by reducing immunopathologies. Finally, we describe the therapeutic potential of harnessing immune subversion strategies used by bacteria to treat chronic inflammatory conditions.
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Affiliation(s)
- Ioannis Kienes
- Department of Immunology, University of Hohenheim, Stuttgart, Germany
| | - Ella L. Johnston
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Melbourne, VIC, Australia
- Research Centre for Extracellular Vesicles, La Trobe University, Melbourne, VIC, Australia
| | - Natalie J. Bitto
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Melbourne, VIC, Australia
- Research Centre for Extracellular Vesicles, La Trobe University, Melbourne, VIC, Australia
| | - Maria Kaparakis-Liaskos
- Department of Microbiology, Anatomy, Physiology and Pharmacology, La Trobe University, Melbourne, VIC, Australia
- Research Centre for Extracellular Vesicles, La Trobe University, Melbourne, VIC, Australia
| | - Thomas A. Kufer
- Department of Immunology, University of Hohenheim, Stuttgart, Germany
- *Correspondence: Thomas A. Kufer,
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5
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Guo CW, Chen KT, You TY, Lin CC, Cheng WC. Synthesis and Evaluation of Diverse N-Substituted Disaccharide Dipeptides for Human NOD2 Stimulation Activity. Chem Asian J 2021; 17:e202101169. [PMID: 34951523 DOI: 10.1002/asia.202101169] [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: 10/11/2021] [Revised: 12/22/2021] [Indexed: 11/08/2022]
Abstract
A new strategy for the preparation of distinct N -substituted muropeptides is described. Different orthogonally N -protected disaccharide thioglycosides were designed and synthesized. Among them, compound 4 , qualified as a key intermediate, was utilized for further chemical transformations to develop a series of diverse N -substituted-glucosaminyl N -substituted-muramyl dipeptides (GMDPs). These unique muropeptides were applied for the study of human NOD2 stimulation. Intriguingly, structural modification of the MurNAc residue to N -non-substituted muramic acid (MurNH 2 ) in GMDP dramatically impaired NOD2 stimulatory activity, but GMDPs possessing the glucosamine residue with a free amino group retained NOD2 stimulation activity. This work is the first study to illustrate the impact of both N -substituents of GMDPs on immunostimulatory activities of human NOD2.
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Affiliation(s)
- Chih-Wei Guo
- Academia Sinica, Genomics Research Center, 128 Sec. 2, Academia Road, Nankang, 11529, Taipei, TAIWAN
| | - Kuo-Ting Chen
- National Dong Hwa University, Department of Chemistry, 1, Sec. 2, Da Hsueh Road, Shoufeng, 974301, Hualien, TAIWAN
| | - Ting-Yun You
- Academia Sinica, Genomics Research Center, 128 Sec. 2, Academia Road, Nankang, 11529, Taipei, TAIWAN
| | - Chun-Cheng Lin
- National Tsing Hua University, Department of Chemistry, 101, Sec. 2, Kuang-Fu Road, 300044, Hsinchu, TAIWAN
| | - Wei-Chieh Cheng
- Academia sinica, Genomics research center, 128, Academia road, sec 2,, 115, Taipei, TAIWAN
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6
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Fernández-García V, González-Ramos S, Martín-Sanz P, García-Del Portillo F, Laparra JM, Boscá L. NOD1 in the interplay between microbiota and gastrointestinal immune adaptations. Pharmacol Res 2021; 171:105775. [PMID: 34273489 DOI: 10.1016/j.phrs.2021.105775] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 06/30/2021] [Accepted: 07/13/2021] [Indexed: 02/07/2023]
Abstract
Nucleotide-binding oligomerization domain 1 (NOD1), a pattern recognition receptor (PRR) that detects bacterial peptidoglycan fragments and other danger signals, has been linked to inflammatory pathologies. NOD1, which is expressed by immune and non-immune cells, is activated after recognizing microbe-associated molecular patterns (MAMPs). This recognition triggers host defense responses and both immune memory and tolerance can also be achieved during these processes. Since the gut microbiota is currently considered a master regulator of human physiology central in health and disease and the intestine metabolizes a wide range of nutrients, drugs and hormones, it is a fact that dysbiosis can alter tissues and organs homeostasis. These systemic alterations occur in response to gastrointestinal immune adaptations that are not yet fully understood. Even if previous evidence confirms the connection between the microbiota, the immune system and metabolic disorders, much remains to be discovered about the contribution of NOD1 to low-grade inflammatory pathologies such as obesity, diabetes and cardiovascular diseases. This review compiles the most recent findings in this area, while providing a dynamic and practical framework with future approaches for research and clinical applications on targeting NOD1. This knowledge can help to rate the consequences of the disease and to stratify the patients for therapeutic interventions.
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Affiliation(s)
- Victoria Fernández-García
- Instituto de Investigaciones Biomédicas Alberto Sols (CSIC-UAM), 28029 Madrid, Spain; Centro de Investigación Biomédica en Red en Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain.
| | - Silvia González-Ramos
- Instituto de Investigaciones Biomédicas Alberto Sols (CSIC-UAM), 28029 Madrid, Spain; Centro de Investigación Biomédica en Red en Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain
| | - Paloma Martín-Sanz
- Instituto de Investigaciones Biomédicas Alberto Sols (CSIC-UAM), 28029 Madrid, Spain; Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd), Madrid, Spain
| | | | - José Moisés Laparra
- Madrid Institute for Advanced Studies in Food (IMDEA Food), Ctra, Cantoblanco 8, 28049 Madrid, Spain
| | - Lisardo Boscá
- Instituto de Investigaciones Biomédicas Alberto Sols (CSIC-UAM), 28029 Madrid, Spain; Centro de Investigación Biomédica en Red en Enfermedades Cardiovasculares (CIBERCV), 28029 Madrid, Spain.
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7
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Bersch K, DeMeester KE, Zagani R, Chen S, Wodzanowski KA, Liu S, Mashayekh S, Reinecker HC, Grimes CL. Bacterial Peptidoglycan Fragments Differentially Regulate Innate Immune Signaling. ACS CENTRAL SCIENCE 2021; 7:688-696. [PMID: 34056099 PMCID: PMC8155477 DOI: 10.1021/acscentsci.1c00200] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Indexed: 05/07/2023]
Abstract
The human innate immune system responds to both pathogen and commensal bacteria at the molecular level using bacterial peptidoglycan (PG) recognition elements. Traditionally, synthetic and commercially accessible PG monosaccharide units known as muramyl dipeptide (MDP) and N-glycolyl MDP (ng-MDP) have been used to probe the mechanism of innate immune activation of pattern recognition receptors, such as NOD-like receptors. However, bacterial PG is a dynamic and complex structure, with various chemical modifications and trimming mechanisms that result in the production of disaccharide-containing elements. These molecules pose as attractive targets for immunostimulatory screening; however, studies are limited because of their synthetic accessibility. Inspired by disaccharide-containing compounds produced from the gut microbe Lactobacillus acidophilus, a robust and scalable chemical synthesis of PG-based disaccharide ligands was implemented. Together with a monosaccharide PG library, compounds were screened for their ability to stimulate proinflammatory genes in bone-marrow-derived macrophages. The data reveal distinct gene induction patterns for monosaccharide and disaccharide PG units, suggesting that PG innate immune signaling is more complex than a one activator-one pathway program, as biologically relevant fragments induce transcriptional programs to different degrees. These disaccharide molecules will serve as critical immunostimulatory tools to more precisely define specialized innate immune regulatory mechanisms that distinguish between commensal and pathogenic bacteria residing in the microbiome.
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Affiliation(s)
- Klare
L. Bersch
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United States
| | - Kristen E. DeMeester
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United States
| | - Rachid Zagani
- Department
of Medicine, Gastrointestinal Unit and Center for the Study of Inflammatory
Bowel Disease, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, United States
| | - Shuyuan Chen
- Department
of Medicine, Division of Digestive and Liver Diseases, and Department
of Immunology, University of Texas Southwestern
Medical Center, 5959 Harry Hines Boulevard, Dallas, Texas 75390, United
States
| | - Kimberly A. Wodzanowski
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United States
| | - Shuzhen Liu
- Department
of Medicine, Division of Digestive and Liver Diseases, and Department
of Immunology, University of Texas Southwestern
Medical Center, 5959 Harry Hines Boulevard, Dallas, Texas 75390, United
States
| | - Siavash Mashayekh
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United States
| | - Hans-Christian Reinecker
- Department
of Medicine, Gastrointestinal Unit and Center for the Study of Inflammatory
Bowel Disease, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts 02114, United States
- Department
of Medicine, Division of Digestive and Liver Diseases, and Department
of Immunology, University of Texas Southwestern
Medical Center, 5959 Harry Hines Boulevard, Dallas, Texas 75390, United
States
| | - Catherine L. Grimes
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United States
- Department
of Biological Sciences, University of Delaware, Newark, Delaware 19716, United States
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8
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Apostolos AJ, Nelson JM, Silva JRA, Lameira J, Achimovich AM, Gahlmann A, Alves CN, Pires MM. Facile Synthesis and Metabolic Incorporation of m-DAP Bioisosteres Into Cell Walls of Live Bacteria. ACS Chem Biol 2020; 15:2966-2975. [PMID: 33078931 DOI: 10.1021/acschembio.0c00618] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Bacterial cell walls contain peptidoglycan (PG), a scaffold that provides proper rigidity to resist lysis from internal osmotic pressure and a barrier to protect cells against external stressors. It consists of repeating sugar units with a linkage to a stem peptide that becomes cross-linked by cell wall transpeptidases (TP). While synthetic PG fragments containing l-lysine in the third position on the stem peptide are easier to access, those with meso-diaminopimelic acid (m-DAP) pose a severe synthetic challenge. Herein, we describe a solid phase synthetic scheme based on widely available building blocks to assemble meso-cystine (m-CYT), which mimics key structural features of m-DAP. To demonstrate proper mimicry of m-DAP, cell wall probes were synthesized with m-CYT in place of m-DAP and evaluated for their metabolic processing in live bacterial cells. We found that m-CYT-based cell wall probes were properly processed by TPs in various bacterial species that endogenously contain m-DAP in their PG. Additionally, we have used hybrid quantum mechanical/molecular mechanical (QM/MM) and molecular dynamics (MD) simulations to explore the influence of m-DAP analogs on the PG cross-linking. The results showed that the cross-linking mechanism of transpeptidases occurred through a concerted process. We anticipate that this strategy, which is based on the use of inexpensive and commercially available building blocks, can be widely adopted to provide greater accessibility of PG mimics for m-DAP containing organisms.
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Affiliation(s)
- Alexis J. Apostolos
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Julia M. Nelson
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - José Rogério A. Silva
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais Universidade Federal do Pará, Belém, Pará 66075-110, Brazil
| | - Jerônimo Lameira
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais Universidade Federal do Pará, Belém, Pará 66075-110, Brazil
| | - Alecia M. Achimovich
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine and Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Andreas Gahlmann
- Department of Molecular Physiology and Biological Physics, University of Virginia School of Medicine and Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Cláudio N. Alves
- Laboratório de Planejamento e Desenvolvimento de Fármacos, Instituto de Ciências Exatas e Naturais Universidade Federal do Pará, Belém, Pará 66075-110, Brazil
| | - Marcos M. Pires
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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9
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DeMeester KE, Liang H, Zhou J, Wodzanowski KA, Prather BL, Santiago CC, Grimes CL. Metabolic Incorporation of N-Acetyl Muramic Acid Probes into Bacterial Peptidoglycan. ACTA ACUST UNITED AC 2020; 11:e74. [PMID: 31763799 DOI: 10.1002/cpch.74] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Bacterial cells utilize small carbohydrate building blocks to construct peptidoglycan (PG), a highly conserved mesh-like polymer that serves as a protective coat for the cell. PG production has long been a target for antibiotics, and its breakdown is a source for human immune recognition. A key component of bacterial PG, N-acetyl muramic acid (NAM), is a vital element in many synthetically derived immunostimulatory compounds. However, the exact molecular details of these structures and how they are generated remain unknown due to a lack of chemical probes surrounding the NAM core. A robust synthetic strategy to generate bioorthogonally tagged NAM carbohydrate units is implemented. These molecules serve as precursors for PG biosynthesis and recycling. Escherichia coli cells are metabolically engineered to incorporate the bioorthogonal NAM probes into their PG network. The probes are subsequently modified using copper-catalyzed azide-alkyne cycloaddition to install fluorophores directly into the bacterial PG, as confirmed by super-resolution microscopy and high-resolution mass spectrometry. Here, synthetic notes for key elements of this process to generate the sugar probes as well as streamlined user-friendly metabolic labeling strategies for both microbiology and immunological applications are described. © 2019 by John Wiley & Sons, Inc. Basic Protocol 1: Synthesis of peracetylated 2-azido glucosamine Basic Protocol 2: Synthesis of 2-azido and 2-alkyne NAM Basic Protocol 3: Synthesis of 3-azido NAM methyl ester Basic Protocol 4: Incorporation of NAM probes into bacterial peptidoglycan Basic Protocol 5: Confirmation of bacterial cell wall remodeling by mass spectrometry.
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Affiliation(s)
- Kristen E DeMeester
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware
| | - Hai Liang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware.,Cutaneous Microbiome and Inflammation Section, Dermatology Branch, National Institute of Arthritis and Musculoskeletal and Skin Diseases, Bethesda, Maryland
| | - Junhui Zhou
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware
| | | | - Benjamin L Prather
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware
| | - Cintia C Santiago
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware.,Center for the Study of Organic Compounds, CEDECOR-UNLP-CIC, Department of Chemistry, Faculty of Exact Sciences, National University of La Plata, Buenos Aires, Argentina
| | - Catherine L Grimes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware.,Department of Biological Sciences, University of Delaware, Newark, Delaware
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10
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D’Ambrosio EA, Bersch KL, Lauro ML, Grimes CL. Differential Peptidoglycan Recognition Assay Using Varied Surface Presentations. J Am Chem Soc 2020; 142:10926-10930. [PMID: 32520538 PMCID: PMC7601999 DOI: 10.1021/jacs.0c03933] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Bacterial peptidoglycan (PG) is recognized by the human innate immune system to generate an appropriate response. To gain an appreciation of how this essential polymer is sensed, a surface plasmon resonance (SPR) assay using varied PG surface presentation was developed. PG derivatives were synthesized and immobilized on the surface at different positions on the molecule to assess effects of ligand orientation on the binding affinities of NOD-like receptors (NLRs). NLRP1 and NOD2 are cytosolic innate immune proteins known to generate an immune response to PG. Both possess conserved leucine rich repeat domains (LRR) as proposed sites of molecular recognition, though limited biochemical evidence exists regarding the mechanisms of PG recognition. Here direct biochemical evidence for the association of PG fragments to NOD2 and NLRP1 with nanomolar affinity is shown. The orientations in which the fragments were presented on the SPR surface influenced the strength of PG recognition by both NLRs. This assay displays fundamental differences in binding preferences for PG by innate immune receptors and reveals unique recognition mechanisms between the LRRs. Each receptor uses specific ligand structural features to achieve optimal binding, which will be critical information to manipulate these responses and combat diseases.
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Affiliation(s)
| | - Klare L. Bersch
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716
| | - Mackenzie L. Lauro
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716
| | - Catherine L. Grimes
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716
- Department of Biological Sciences, University of Delaware, Newark, DE 19716
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11
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Liu C, Yang S, Wang K, Bao X, Liu Y, Zhou S, Liu H, Qiu Y, Wang T, Yu H. Alkaloids from Traditional Chinese Medicine against hepatocellular carcinoma. Biomed Pharmacother 2019; 120:109543. [PMID: 31655311 DOI: 10.1016/j.biopha.2019.109543] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 10/03/2019] [Accepted: 10/04/2019] [Indexed: 02/06/2023] Open
Abstract
Hepatocellular carcinoma (HCC) has become one of the major diseases that are threatening human health in the 21st century. Currently there are many approaches to treat liver cancer, but each has its own advantages and disadvantages. Among various methods of treating liver cancer, natural medicine treatment has achieved promising results because of their superiorities of high efficiency and availability, as well as low side effects. Alkaloids, as a class of natural ingredients derived from traditional Chinese medicines, have previously been shown to exert prominent anti-hepatocarcinogenic effects, through various mechanisms including inhibition of proliferation, metastasis and angiogenesis, changing cell morphology, promoting apoptosis and autophagy, triggering cell cycle arrest, regulating various cancer-related genes as well as pathways and so on. As a consequence, alkaloids suppress the development and progression of liver cancer. In this study, the mechanisms of representative alkaloids against hepatocarcinoma in each class are described systematically according to the structure classification, which mainly divides alkaloids into piperidine alkaloids, isoquinoline alkaloids, indole alkaloids, terpenoids alkaloids, steroidal alkaloids and other alkaloids. Besides using them alone, synergistic effects created together with other chemotherapy drugs and some special preparation methods also have been demonstrated. In this review, we have summarized the potential roles of several common alkaloids in the prevention and treatment of HCC, by revising the preclinical studies, highlighting the potential applications of alkaloids when they function as a therapeutic choice for HCC treatment, and integrating them into clinical practices.
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Affiliation(s)
- Caiyan Liu
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Shenshen Yang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Kailong Wang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Xiaomei Bao
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Yiman Liu
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Shiyue Zhou
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Hongwei Liu
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Yuling Qiu
- School of Pharmacy, Tianjin Medical University, Tianjin, 300070, China
| | - Tao Wang
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China
| | - Haiyang Yu
- Tianjin State Key Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, Tianjin, 300193, China.
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