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Guzelj S, Weiss M, Slütter B, Frkanec R, Jakopin Ž. Covalently Conjugated NOD2/TLR7 Agonists Are Potent and Versatile Immune Potentiators. J Med Chem 2022; 65:15085-15101. [DOI: 10.1021/acs.jmedchem.2c00808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Samo Guzelj
- Faculty of Pharmacy, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - Matjaž Weiss
- Faculty of Pharmacy, University of Ljubljana, SI-1000 Ljubljana, Slovenia
| | - Bram Slütter
- Division of BioTherapeutics, Leiden Academic Centre for Drug Research, Leiden University, 2333 CC Leiden, The Netherlands
| | - Ruža Frkanec
- Centre for Research and Knowledge Transfer in Biotechnology, University of Zagreb, 10000 Zagreb, Croatia
| | - Žiga Jakopin
- Faculty of Pharmacy, University of Ljubljana, SI-1000 Ljubljana, Slovenia
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Synthesis and Immunological Evaluation of Mannosylated Desmuramyl Dipeptides Modified by Lipophilic Triazole Substituents. Int J Mol Sci 2022; 23:ijms23158628. [PMID: 35955759 PMCID: PMC9368957 DOI: 10.3390/ijms23158628] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 07/30/2022] [Accepted: 08/01/2022] [Indexed: 02/05/2023] Open
Abstract
Muramyl dipeptide (N-acetylmuramyl-L-alanyl-D-isoglutamine, MDP) is the smallest peptidoglycan fragment able to trigger an immune response by activating the NOD2 receptor. Structural modification of MDP can lead to analogues with improved immunostimulating properties. The aim of this work was to prepare mannosylated desmuramyl peptides (ManDMP) containing lipophilic triazole substituents to study their immunomodulating activities in vivo. The adjuvant activity of the prepared compounds was evaluated in the mouse model using ovalbumin as an antigen and compared to the MDP and referent adjuvant ManDMPTAd. The obtained results confirm that the α-position of D-isoGln is the best position for the attachment of lipophilic substituents, especially adamantylethyl triazole. Compound 6c exhibited the strongest adjuvant activity, comparable to the MDP and better than referent ManDMPTAd.
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Sadakane K, Ichinose T, Maki T, Nishikawa M. Co-exposure of peptidoglycan and heat-inactivated Asian sand dust exacerbates ovalbumin-induced allergic airway inflammation in mice. Inhal Toxicol 2022; 34:231-243. [PMID: 35698289 DOI: 10.1080/08958378.2022.2086650] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AIMS Asian sand dust (ASD) comprises soil particles, microorganisms, and various chemical components. We examined whether peptidoglycan (PGN), a structural cell wall component of Gram-positive bacteria, exacerbates ASD-induced allergic airway inflammation in mice. METHODS The ASD (median diameter ∼4 µm) used was a certified reference material from the National Institute for Environmental Studies in Japan, derived from Gobi Desert surface soil collected in 2011. BALB/c mice were intratracheally exposed to PGN, heat-inactivated ASD (H-ASD), and ovalbumin (OVA), individually and in combination. Twenty-four hours after the final intratracheal administration, bronchoalveolar lavage fluid (BALF) and serum samples were collected. Inflammatory cell count, cytokine levels in the BALF, OVA-specific immunoglobulin levels in the serum, and pathological changes in the lungs were analyzed. RESULTS AND DISCUSSION After OVA + PGN + H-ASD treatment, the number of eosinophils, neutrophils, and macrophages in the BALF and of eosinophils in the lung tissue was significantly higher than that after OVA + PGN or OVA + H-ASD treatment. Moreover, levels of chemokines and cytokines associated with eosinophil recruitment and activation were significantly higher in the BALF of this group than in that of the OVA + PGN group, and tended to be higher than those in the OVA + H-ASD group. Pathological changes in the lungs were most severe in mice treated with OVA + PGN + H-ASD. CONCLUSIONS Our results indicate that PGN is involved in the exacerbation of ASD-induced allergic airway inflammation in mice. Thus, inhalation of ASD containing Gram-positive bacteria may trigger allergic bronchial asthma.
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Affiliation(s)
- Kaori Sadakane
- Department of Health Sciences, Oita University of Nursing and Health Sciences, Oita, Japan
| | - Takamichi Ichinose
- Department of Health Sciences, Oita University of Nursing and Health Sciences, Oita, Japan.,Department of Environmental Engineering, Graduate School of Engineering, Kyoto University, Kyoto, Japan
| | - Teruya Maki
- Department of Life Science, Kindai University, Osaka, Japan
| | - Masataka Nishikawa
- Environmental Standards Section, National Institute for Environmental Studies, Ibaraki, Japan
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Sun Q, Liu X, Li X. Peptidoglycan-based immunomodulation. Appl Microbiol Biotechnol 2022; 106:981-993. [PMID: 35076738 DOI: 10.1007/s00253-022-11795-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 01/06/2022] [Accepted: 01/19/2022] [Indexed: 11/02/2022]
Abstract
Peptidoglycan (PGN) is a unique component in the cytoderm of prokaryotes which can be recognized by different pathogen-associated molecular patterns (PAMPs) in eukaryotes, followed by a cascade of immune responses via different pathways. This review outlined the basic structure of PGN, its immunologic functions. The immunomodulation pathways mediated by PGN were elaborated. PGN induces specific immunity through stimulating different cytokine release and Th1/Th2-dominated immune responses during humoral/cellular immune response. The nonspecific immunity activation by PGN involves immunomodulation by different pattern recognition receptors (PRRs) including PGN recognition proteins (PGRPs), nucleotide oligomerization domain (NOD)-like receptors (NLRs), Toll-like receptors (TLRs), and C-type lectin receptors (CLRs). The sources and classification of PGRPs were summarized. In view of the stimulating activities of PGN and its monomers, the potential application of PGN as vaccine or adjuvant was prospected. This review provides systematic information on PGN functionalities from the point of immunoregulation, which might be useful in the deep exploitation of PGN.Key points. The immunological functions of PGN were illustrated. Cellular and humoral immunomodulation by PGN were outlined. The use of PGN as vaccine or adjuvant was prospected.
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Affiliation(s)
- Qingshen Sun
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, 150500, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Xiaoli Liu
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, 150500, China.,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, 150080, China
| | - Xiuliang Li
- Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education, Heilongjiang University, Harbin, 150500, China. .,Key Laboratory of Microbiology, College of Heilongjiang Province, School of Life Sciences, Heilongjiang University, Harbin, 150080, China.
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Design, Synthesis, and Biological Evaluation of Desmuramyl Dipeptides Modified by Adamantyl-1,2,3-triazole. Molecules 2021; 26:molecules26216352. [PMID: 34770761 PMCID: PMC8587862 DOI: 10.3390/molecules26216352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/16/2021] [Accepted: 10/18/2021] [Indexed: 11/17/2022] Open
Abstract
Muramyl dipeptide (MDP) is the smallest peptidoglycan fragment able to trigger the immune response. Structural modification of MDP can lead to the preparation of analogs with improved immunostimulant properties, including desmuramyl peptides (DMPs). The aim of this work was to prepare the desmuramyl peptide (L-Ala-D-Glu)-containing adamantyl-triazole moiety and its mannosylated derivative in order to study their immunomodulatory activities in vivo. The adjuvant activity of the prepared compounds was evaluated in a murine model using ovalbumin as an antigen, and compared to the reference adjuvant ManAdDMP. The results showed that the introduction of the lipophilic adamantyl-triazole moiety at the C-terminus of L-Ala-D-Glu contributes to the immunostimulant activity of DMP, and that mannosylation of DMP modified with adamantyl-triazole causes the amplification of its immunostimulant activity.
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Manček-Keber M, Ribić R, Chain F, Sinnaeve D, Martins JC, Jerala R, Tomić S, Fehér K. Adamantane Containing Peptidoglycan Fragments Enhance RANTES and IL-6 Production in Lipopolysaccharide-Induced Macrophages. Molecules 2020; 25:molecules25163707. [PMID: 32823878 PMCID: PMC7465286 DOI: 10.3390/molecules25163707] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 07/08/2020] [Accepted: 08/06/2020] [Indexed: 11/24/2022] Open
Abstract
We report the enhancement of the lipopolysaccharide-induced immune response by adamantane containing peptidoglycan fragments in vitro. The immune stimulation was detected by Il-6 (interleukine 6) and RANTES (regulated on activation, normal T cell expressed and secreted) chemokine expression using cell assays on immortalized mouse bone-marrow derived macrophages. The most active compound was a α-D-mannosyl derivative of an adamantylated tripeptide with L-chirality at the adamantyl group attachment, whereby the mannose moiety assumed to target mannose receptors expressed on macrophage cell surfaces. The immune co-stimulatory effect was also influenced by the configuration of the adamantyl center, revealing the importance of specific molecular recognition event taking place with its receptor. The immunostimulating activities of these compounds were further enhanced upon their incorporation into lipid bilayers, which is likely related to the presence of the adamantyl group that helps anchor the peptidoglycan fragment into lipid nanoparticles. We concluded that the proposed adamantane containing peptidoglycan fragments act as co-stimulatory agents and are also suitable for the preparation of lipid nanoparticle-based delivery of peptidoglycan fragments.
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Affiliation(s)
- Mateja Manček-Keber
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova 19, P.O. Box 660, SI-1001 Ljubljana, Slovenia; (M.M.-K.); (R.J.)
- Centre of Excelence EN-FIST, SI-1000 Ljubljana, Slovenia
| | - Rosana Ribić
- University Center Varaždin, University North, Jurja Križanića 31b, HR-42 000 Varaždin, Croatia;
| | - Fernando Chain
- Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium; (F.C.); (D.S.); (J.C.M.)
| | - Davy Sinnaeve
- Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium; (F.C.); (D.S.); (J.C.M.)
- Univ. Lille, Inserm, Institut Pasteur de Lille, CHU Lille, U1167—Labex DISTALZ—RID-AGE—Risk Factors and Molecular Determinants of Aging-Related Diseases, F-59000 Lille, France
- CNRS, ERL9002—Integrative Structural Biology, F-59000 Lille, France
| | - José C. Martins
- Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, 9000 Ghent, Belgium; (F.C.); (D.S.); (J.C.M.)
| | - Roman Jerala
- Department of Synthetic Biology and Immunology, National Institute of Chemistry, Hajdrihova 19, P.O. Box 660, SI-1001 Ljubljana, Slovenia; (M.M.-K.); (R.J.)
- Centre of Excelence EN-FIST, SI-1000 Ljubljana, Slovenia
| | - Srđanka Tomić
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102A, HR-10 000 Zagreb, Croatia;
| | - Krisztina Fehér
- Heidelberg Institute for Theoretical Studies, Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany
- Molecular Recognition and Interaction Research Group, Hungarian Academy of Sciences, University of Debrecen, Egyetem tér 1, H-4032 Debrecen, Hungary
- Correspondence: or ; Tel.: +36-52-512-900; Fax: +36-52-518-660
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7
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Ribić R, Stojković R, Milković L, Antica M, Cigler M, Tomić S. Design, synthesis and biological evaluation of immunostimulating mannosylated desmuramyl peptides. Beilstein J Org Chem 2019; 15:1805-1814. [PMID: 31467600 PMCID: PMC6693374 DOI: 10.3762/bjoc.15.174] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 07/11/2019] [Indexed: 12/28/2022] Open
Abstract
Muramyl dipeptide is the minimal structure of peptidoglycan with adjuvant properties. Replacement of the N-acetylmuramyl moiety and increase of lipophilicity are important approaches in the preparation of muramyl dipeptide analogues with improved pharmacological properties. Mannose receptors present on immunocompetent cells are pattern-recognition receptors and by mannose ligands binding they affect the immune system. Here we present the design, synthesis and biological evaluation of novel mannosylated desmuramyl peptide derivatives. Mannose was coupled to dipeptides containing a lipophilic adamantane on N- or C-terminus through a glycolyl or hydroxyisobutyryl linker. Adjuvant activities of synthesized compounds were investigated in the mouse model using ovalbumin as an antigen. Their activities were compared to the previously described mannosylated adamantane-containing desmuramyl peptide and peptidoglycan monomer. Tested compounds exhibited adjuvant activity and the strongest enhancement of IgG production was stimulated by compound 21 (Man-OCH2-ᴅ-(1-Ad)Gly-ʟ-Ala-ᴅ-isoGln).
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Affiliation(s)
- Rosana Ribić
- University Center Varaždin, University North, Jurja Križanića 31b, HR-42000 Varaždin, Croatia
| | - Ranko Stojković
- Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia
| | - Lidija Milković
- Ruđer Bošković Institute, Bijenička cesta 54, HR-10000 Zagreb, Croatia
| | | | - Marko Cigler
- Department of Chemistry, Technical University Munich, Lichtenbergstraße 4, D-85748 Garching, Germany
| | - Srđanka Tomić
- Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
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Forbes N, Hussain MT, Briuglia ML, Edwards DP, Horst JHT, Szita N, Perrie Y. Rapid and scale-independent microfluidic manufacture of liposomes entrapping protein incorporating in-line purification and at-line size monitoring. Int J Pharm 2018; 556:68-81. [PMID: 30503269 DOI: 10.1016/j.ijpharm.2018.11.060] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 11/22/2018] [Accepted: 11/23/2018] [Indexed: 10/27/2022]
Abstract
Within this paper we present work that has the ability to de-risk the translation of liposomes from bench to the clinic. We have used microfluidics for the rapid and scale-independent manufacture of liposomes and have incorporated in-line purification and at-line monitoring of particle size. Using this process, we have manufactured a range of neutral and anionic liposomes incorporating protein. Factors investigated include the microfluidics operating parameters (flow rate ratio (FRR) and total flow rate (TFR)) and the liposome formulation. From these studies, we demonstrate that FRR is a key factor influencing liposome size, protein loading and release profiles. The liposome formulations produced by microfluidics offer high protein loading (20-35%) compared to production by sonication or extrusion (<5%). This high loading achieved by microfluidics results from the manufacturing process and is independent of lipid selection and concentration across the range tested. Using in-line purification and at-line size monitoring, we outline the normal operating range for effective production of size controlled (60-100 nm), homogenous (PDI <0.2) high load liposomes. This easy microfluidic process provides a translational manufacturing pathway for liposomes in a wide-range of applications.
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Affiliation(s)
- Neil Forbes
- Strathclyde Institute of Pharmacy and Biomedical Sciences, 161 Cathedral St, University of Strathclyde, Glasgow, Scotland, G4 0RE, United Kingdom
| | - Maryam T Hussain
- Strathclyde Institute of Pharmacy and Biomedical Sciences, 161 Cathedral St, University of Strathclyde, Glasgow, Scotland, G4 0RE, United Kingdom
| | - Maria L Briuglia
- Strathclyde Institute of Pharmacy and Biomedical Sciences, Technology and Innovation Centre, University of Strathclyde, 99 George St, Glasgow, G1 1RD, United Kingdom
| | - Darren P Edwards
- Drug Discovery Unit, School of Life and Health Sciences, University of Dundee, Dow St, Dundee, Scotland DD1 5EH, United Kingdom
| | - Joop H Ter Horst
- Strathclyde Institute of Pharmacy and Biomedical Sciences, Technology and Innovation Centre, University of Strathclyde, 99 George St, Glasgow, G1 1RD, United Kingdom
| | - Nicolas Szita
- Department of Biochemical Engineering, University College London, London WC1H 0AH, United Kingdom
| | - Yvonne Perrie
- Strathclyde Institute of Pharmacy and Biomedical Sciences, 161 Cathedral St, University of Strathclyde, Glasgow, Scotland, G4 0RE, United Kingdom.
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9
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Gobec M, Tomašič T, Štimac A, Frkanec R, Trontelj J, Anderluh M, Mlinarič-Raščan I, Jakopin Ž. Discovery of Nanomolar Desmuramylpeptide Agonists of the Innate Immune Receptor Nucleotide-Binding Oligomerization Domain-Containing Protein 2 (NOD2) Possessing Immunostimulatory Properties. J Med Chem 2018. [PMID: 29543461 DOI: 10.1021/acs.jmedchem.7b01052] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Muramyl dipeptide (MDP), a fragment of bacterial peptidoglycan, has long been known as the smallest fragment possessing adjuvant activity, on the basis of its agonistic action on the nucleotide-binding oligomerization domain-containing protein 2 (NOD2). There is a pressing need for novel adjuvants, and NOD2 agonists provide an untapped source of potential candidates. Here, we report the design, synthesis, and characterization of a series of novel acyl tripeptides. A pivotal structural element for molecular recognition by NOD2 has been identified, culminating in the discovery of compound 9, the most potent desmuramylpeptide NOD2 agonist to date. Compound 9 augmented pro-inflammatory cytokine release from human peripheral blood mononuclear cells in synergy with lipopolysaccharide. Furthermore, it was able to induce ovalbumin-specific IgG titers in a mouse model of adjuvancy. These findings provide deeper insights into the structural requirements of desmuramylpeptides for NOD2-activation and highlight the potential use of NOD2 agonists as adjuvants for vaccines.
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Affiliation(s)
- Martina Gobec
- Faculty of Pharmacy , University of Ljubljana , Aškerčeva 7 , SI-1000 Ljubljana , Slovenia
| | - Tihomir Tomašič
- Faculty of Pharmacy , University of Ljubljana , Aškerčeva 7 , SI-1000 Ljubljana , Slovenia
| | - Adela Štimac
- Centre for Research and Knowledge Transfer in Biotechnology , University of Zagreb , Rockefellerova 10 , 10000 Zagreb , Croatia
| | - Ruža Frkanec
- Centre for Research and Knowledge Transfer in Biotechnology , University of Zagreb , Rockefellerova 10 , 10000 Zagreb , Croatia
| | - Jurij Trontelj
- Faculty of Pharmacy , University of Ljubljana , Aškerčeva 7 , SI-1000 Ljubljana , Slovenia
| | - Marko Anderluh
- Faculty of Pharmacy , University of Ljubljana , Aškerčeva 7 , SI-1000 Ljubljana , Slovenia
| | - Irena Mlinarič-Raščan
- Faculty of Pharmacy , University of Ljubljana , Aškerčeva 7 , SI-1000 Ljubljana , Slovenia
| | - Žiga Jakopin
- Faculty of Pharmacy , University of Ljubljana , Aškerčeva 7 , SI-1000 Ljubljana , Slovenia
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10
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Mahla RS, Reddy MC, Prasad DVR, Kumar H. Sweeten PAMPs: Role of Sugar Complexed PAMPs in Innate Immunity and Vaccine Biology. Front Immunol 2013; 4:248. [PMID: 24032031 PMCID: PMC3759294 DOI: 10.3389/fimmu.2013.00248] [Citation(s) in RCA: 156] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Accepted: 08/09/2013] [Indexed: 12/12/2022] Open
Abstract
Innate sensors play a critical role in the early innate immune responses to invading pathogens through sensing of diverse biochemical signatures also known as pathogen associated molecular patterns (PAMPs). These biochemical signatures primarily consist of a major family of biomolecules such as proteins, lipids, nitrogen bases, and sugar and its complexes, which are distinct from host molecules and exclusively expressed in pathogens and essential to their survival. The family of sensors known as pattern recognition receptors (PRRs) are germ-line encoded, evolutionarily conserved molecules, and consist of Toll-like receptors (TLRs), RIG-I-like receptors (RLRs), NOD-like receptors (NLRs), C-type lectin-like receptors (CLRs), and DNA sensors. Sensing of PAMP by PRR initiates the cascade of signaling leading to the activation of transcription factors, such as NF-κB and interferon regulatory factors (IRFs), resulting in a variety of cellular responses, including the production of interferons (IFNs) and pro-inflammatory cytokines. In this review, we discuss sensing of different types of glycosylated PAMPs such as β-glucan (a polymeric sugar) or lipopolysaccharides, nucleic acid, and so on (sugar complex PAMPs) by different families of sensors, its role in pathogenesis, and its application in development of potential vaccine and vaccine adjuvants.
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Affiliation(s)
- Ranjeet Singh Mahla
- Laboratory of Immunology, Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) , Bhopal , India
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Ribić R, Habjanec L, Frkanec R, Vranešić B, Tomić S. Influence of mannosylation on immunostimulating activity of adamant-1-yl tripeptide. Chem Biodivers 2012; 9:1373-81. [PMID: 22782883 DOI: 10.1002/cbdv.201200008] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The mannosylated derivative of adamant-1-yl tripeptide (D-(Ad-1-yl)Gly-L-Ala-D-isoGln) was prepared to study the effects of mannosylation on adjuvant (immunostimulating) activity. Mannosylated adamant-1-yl tripeptide (Man-OCH(2) CH(Me)CO-D-(Ad-1-yl)Gly-L-Ala-D-isoGln) is a non-pyrogenic, H(2) O-soluble, and non-toxic compound. Adjuvant activity of mannosylated adamantyl tripeptide was tested in the mouse model with ovalbumin as an antigen and in comparison to the parent tripeptide and peptidoglycan monomer (PGM, β-D-GlcNAc-(1→4)-D-MurNAc-L-Ala-D-isoGln-mesoDAP(εNH(2) )-D-Ala-D-Ala), a well-known effective adjuvant. The mannosylation of adamantyl tripeptide caused the amplification of its immunostimulating activity in such a way that it was comparable to that of PGM.
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Affiliation(s)
- Rosana Ribić
- Department of Chemistry, Faculty of Science, University of Zagreb, Zagreb.
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12
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Ribić R, Habjanec L, Vranešić B, Frkanec R, Tomić S. Synthesis and immunostimulating properties of novel adamant-1-yl tripeptides. Chem Biodivers 2012; 9:777-88. [PMID: 22492495 DOI: 10.1002/cbdv.201100232] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The aim of this work was to prepare L- and D-(adamant-1-yl)-Gly-L-Ala-D-isoGln peptides in order to study their adjuvant (immunostimulating) activities. Adjuvant activity of adamant-1-yl tripeptides was tested in the mouse model using ovalbumin as an antigen and in comparison to the peptidoglycan monomer (PGM; β-D-GlcNAc-(1→4)-D-MurNAc-L-Ala-D-isoGln-mesoDAP(εNH(2) )-D-Ala-D-Ala) and structurally related adamant-2-yl tripeptides.
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Affiliation(s)
- Rosana Ribić
- Department of Chemistry, University of Zagreb, Zagreb, Croatia
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In vivo and ex vivo EPR detection of spin-labelled ovalbumin in mice. Int J Biol Macromol 2010; 47:396-401. [DOI: 10.1016/j.ijbiomac.2010.06.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2010] [Revised: 06/15/2010] [Accepted: 06/16/2010] [Indexed: 12/14/2022]
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14
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Habjanec L, Halassy B, Tomasić J. Comparative study of structurally related peptidoglycan monomer and muramyl dipeptide on humoral IgG immune response to ovalbumin in mouse. Int Immunopharmacol 2010; 10:751-9. [PMID: 20403461 DOI: 10.1016/j.intimp.2010.04.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2009] [Revised: 03/25/2010] [Accepted: 04/09/2010] [Indexed: 12/01/2022]
Abstract
Structurally related peptidoglycan monomer (PGM) and muramyl dipeptide (MDP) differ in several aspects of biological activity but have in common immunostimulating properties. Comparative study of the effects of these adjuvants on humoral IgG immune response specific for protein antigen ovalbumin (OVA) was carried out in two inbred mouse strains, CBA and NIH/OlaHsd, and their ability to modulate the bias of immune response towards Th1/Th2 was evaluated. MDP had better adjuvant activity at some points than PGM, whereas both adjuvants stimulated Th2-biased immune response specific for OVA. In comparison to Complete Freund's adjuvant (CFA), as a golden standard of adjuvant action, both PGM and MDP exhibited considerably lower activity. Addition of PGM to Incomplete Freund's adjuvant (IFA) on humoral immune response was studied also, and the effect of such adjuvant formulation was compared to the effect of CFA. While CFA induced the switch towards Th1-biased immune response, the addition of PGM into IFA did have no impact on modulating the immune response towards more pronounced Th2-type of immune response, defined by IFA itself.
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Affiliation(s)
- Lidija Habjanec
- Research and Development Department, Institute of Immunology, Inc., Rockefellerova 10, HR-10000 Zagreb, Croatia.
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Liposome fusogenicity and entrapment efficiency of antigen determine the Th1/Th2 bias of antigen-specific immune response. Vaccine 2009; 27:5435-42. [DOI: 10.1016/j.vaccine.2009.07.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Revised: 06/26/2009] [Accepted: 07/07/2009] [Indexed: 11/20/2022]
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16
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Novel mannosyl derivatives of peptidoglycan monomer: Synthesis and biological evaluation of immunomodulatory properties. Bioorg Med Chem 2009; 17:6096-105. [DOI: 10.1016/j.bmc.2009.06.016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2009] [Revised: 05/29/2009] [Accepted: 06/05/2009] [Indexed: 11/21/2022]
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Brgles M, Jurašin D, Sikirić MD, Frkanec R, Tomašić J. Entrapment of Ovalbumin into Liposomes—Factors Affecting Entrapment Efficiency, Liposome Size, and Zeta Potential. J Liposome Res 2008; 18:235-48. [DOI: 10.1080/08982100802312762] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Habjanec L, Halassy B, Tomašić J. Immunomodulatory activity of novel adjuvant formulations based on Montanide ISA oil-based adjuvants and peptidoglycan monomer. Int Immunopharmacol 2008; 8:717-24. [DOI: 10.1016/j.intimp.2008.01.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2007] [Revised: 01/14/2008] [Accepted: 01/18/2008] [Indexed: 10/22/2022]
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Habjanec L, Halassy B, Vdović V, Balija ML, Tomašić J. Comparison of mouse and rabbit model for the assessment of strong PGM-containing oil-based adjuvants. Vet Immunol Immunopathol 2008; 121:232-40. [DOI: 10.1016/j.vetimm.2007.09.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2007] [Revised: 09/21/2007] [Accepted: 09/26/2007] [Indexed: 11/29/2022]
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DeNardis N, Žutić V, Svetličić V, Frkanec R, Tomašić J. In Situ Amperometric Characterization of Liposome Suspensions with Concomitant Oxygen Reduction. ELECTROANAL 2007. [DOI: 10.1002/elan.200703999] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Brgles M, Mirosavljević K, Noethig-Laslo V, Frkanec R, Tomasić J. Spin-labelling study of interactions of ovalbumin with multilamellar liposomes and specific anti-ovalbumin antibodies. Int J Biol Macromol 2007; 40:312-8. [PMID: 16999993 DOI: 10.1016/j.ijbiomac.2006.08.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2006] [Revised: 08/18/2006] [Accepted: 08/22/2006] [Indexed: 10/24/2022]
Abstract
Ovalbumin (OVA) has been used continuously as the model antigen in numerous studies of immune reactions and antigen processing, very often encapsulated into liposomes. The purpose of this work was to study the possible interactions of spin-labelled OVA and lipids in liposomal membranes using electron spin resonance (ESR) spectroscopy. OVA was covalently spin-labelled with 4-maleimido-2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO-maleimide), characterized and encapsulated into multilamellar, negatively charged liposomes. ESR spectra of this liposomal preparation gave evidence for the interaction of OVA with the lipid bilayers. Such an interaction was also evidenced by the ESR spectra of liposomal preparation containing OVA, where liposomes were spin-labelled with n-doxyl stearic acids. The spin-labelled OVA retains its property to bind specific anti-OVA antibodies, as shown by ESR spectroscopy, but also in ELISA for specific anti-OVA IgG.
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Affiliation(s)
- Marija Brgles
- Institute of Immunology Inc., PO Box 266, 10001 Zagreb, Croatia
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Halassy B, Vdović V, Habjanec L, Balija ML, Gebauer B, Sabioncello A, Santek T, Tomasić J. Effectiveness of novel PGM-containing incomplete Seppic adjuvants in rabbits. Vaccine 2007; 25:3475-81. [PMID: 17239503 DOI: 10.1016/j.vaccine.2006.12.040] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2006] [Revised: 12/15/2006] [Accepted: 12/18/2006] [Indexed: 11/24/2022]
Abstract
Peptidoglycan monomer (PGM) is adjuvant active molecule in experimental mice, although its adjuvanticity is much lower in comparison to potent adjuvants. The novel adjuvant formulations were developed by incorporation of PGM into Montanide ISA 206 and Montanide ISA 720 adjuvants, with the aim to enhance its adjuvanticity by protecting it from the fast degradation and metabolic clearance. Adjuvanticity of the novel adjuvant formulations was tested in rabbits for induction of protein-specific antibodies. Both novel adjuvants ISA206(PGM) and ISA720(PGM) were significantly stronger than Montanide adjuvants themselves, and also significantly more potent than Complete Freund Adjuvant. Montanide ISA 720 was shown as much better carrier of PGM, since the novel ISA720(PGM) adjuvant was significantly stronger adjuvant than the ISA206(PGM).
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Affiliation(s)
- Beata Halassy
- Research and Development Department, Institute of Immunology, Inc., Rockefellerova 10, HR-10000 Zagreb, Croatia.
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