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Di Lorenzo F, Palmigiano A, Al Bitar-Nehme S, Sturiale L, Duda KA, Gully D, Lanzetta R, Giraud E, Garozzo D, Bernardini ML, Molinaro A, Silipo A. The Lipid A from Rhodopseudomonas palustris Strain BisA53 LPS Possesses a Unique Structure and Low Immunostimulant Properties. Chemistry 2016; 23:3637-3647. [PMID: 28004420 DOI: 10.1002/chem.201604379] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [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: 09/15/2016] [Indexed: 12/15/2022]
Abstract
The search for novel lipid A analogues from any biological source that can act as antagonists, displaying inhibitory activity towards the production of pro-inflammatory cytokines, or as immunomodulators in mammals, is a very topical issue. To this aim, the structure and immunological properties of the lipopolysaccharide lipid A from the purple nonsulfur bacterium Rhodopseudomonas palustris strain BisA53 have been determined. This lipid A displays a unique structural feature, with a non-phosphorylated skeleton made up of the tetrasaccharide Manp-α-(1→4)-GlcpN3N-β-1→6-GlcpN3N-α-(1→1)-α-GalpA, and four primary amide-linked 14:0(3-OH) and, as secondary O-acyl substituents, a 16:0 and the very long-chain fatty acid 26:0(25-OAc), appended on the GlcpN3N units. This lipid A architecture is definitely rare, so far identified only in the genus Bradyrhizobium. Immunological tests on both murine bone-marrow-derived and human monocyte-derived macrophages revealed an extremely low immunostimulant capability of this LPS lipid A.
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Affiliation(s)
- Flaviana Di Lorenzo
- Department of Chemical Sciences, University of Naples, Federico II, via Cinthia 4, 80126, Naples, Italy
| | - Angelo Palmigiano
- CNR-Istituto per i Polimeri, Compositi e Biomateriali IPCB-Unità di Catania, Via Gaifami 18, 95126, Catania, Italy
| | - Sami Al Bitar-Nehme
- Dipartimento di Biologia e Biotecnologie "C. Darwin", Sapienza-Università di Roma, Piazzale Aldo Moro 5, 00185, Roma, Italy
| | - Luisa Sturiale
- CNR-Istituto per i Polimeri, Compositi e Biomateriali IPCB-Unità di Catania, Via Gaifami 18, 95126, Catania, Italy
| | - Katarzyna A Duda
- Junior Group of Allergobiochemistry, Research Center Borstel, Leibniz-Center for Medicine and Biosciences, 23845, Borstel, Airway Research Center North (ARCN), German Center for Lung Research, Germany
| | - Djamel Gully
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, 34398, Montpellier Cedex 5, France
| | - Rosa Lanzetta
- Department of Chemical Sciences, University of Naples, Federico II, via Cinthia 4, 80126, Naples, Italy
| | - Eric Giraud
- IRD, Laboratoire des Symbioses Tropicales et Méditerranéennes, UMR IRD/SupAgro/INRA/UM2/CIRAD, Campus International de Baillarguet, TA A-82/J, 34398, Montpellier Cedex 5, France
| | - Domenico Garozzo
- CNR-Istituto per i Polimeri, Compositi e Biomateriali IPCB-Unità di Catania, Via Gaifami 18, 95126, Catania, Italy
| | - Maria Lina Bernardini
- Dipartimento di Biologia e Biotecnologie "C. Darwin", Sapienza-Università di Roma, Piazzale Aldo Moro 5, 00185, Roma, Italy.,Istituto Pasteur Italia-Fondazione Cenci Bolognetti, Sapienza-Università di Roma, Italy
| | - Antonio Molinaro
- Department of Chemical Sciences, University of Naples, Federico II, via Cinthia 4, 80126, Naples, Italy
| | - Alba Silipo
- Department of Chemical Sciences, University of Naples, Federico II, via Cinthia 4, 80126, Naples, Italy
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