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Suraiya S, Jang WJ, Cho HJ, Choi YB, Park HD, Kim JM, Kong IS. Immunomodulatory Effects of Monascus spp.-Fermented Sacccharina japonica Extracts on the Cytokine Gene Expression of THP-1 Cells. Appl Biochem Biotechnol 2019; 188:498-513. [PMID: 30536032 DOI: 10.1007/s12010-018-02930-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 11/30/2018] [Indexed: 12/21/2022]
Abstract
The immunomodulatory effects of Monascus-fermented Saccharina japonica extract on anti- and pro-inflammatory cytokines gene expression of THP-1 cells were evaluated. Extracts of fermented samples showed higher phenolic, flavonoid, protein, and reducing sugar contents than unfermented one. Fermented samples were rich in many bioactive compounds determined by GC-MS analyses and showed cell viability greater than 85% in MTS assay. Regarding the anti-inflammatory and pro-inflammatory activities of the different samples, Q-PCR analyses revealed that IL-10 gene expression in THP-1 cells was significantly higher (p < 0.05) in cells treated with the SjMp or SjMk sample than those treated with the unfermented sample. Cells treated with the SjMp extract or lipopolysaccharide (LPS) showed significantly (p < 0.05) higher relative gene expression of IL-4 cytokine than cells treated with SjMk or SjU extracts. The relative gene expression of IFN-α was higher in cells treated with SjMp followed by LPS, SjMk, and SjU. TGF-β expression was higher in LPS-stimulated cells followed by SjMk and other samples. Cells treated with SjMp exhibited significantly higher pro-inflammatory (IL-6, IL-8, TNF-α, and NF-κB) cytokine gene expression than cells treated with SjU. These results revealed that extracts from S. japonica fermented with Monascus spp. regulate cytokine gene expression. Graphical abstract ᅟ.
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Affiliation(s)
- Sharmin Suraiya
- Department of Biotechnology, College of Fisheries Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea
- Department of Fisheries and Marine Bioscience, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj, 8100, Bangladesh
| | - Won Je Jang
- Department of Biotechnology, College of Fisheries Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea
| | - Hwa Jin Cho
- Department of Biotechnology, College of Fisheries Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea
| | - Yu Bin Choi
- Department of Biotechnology, College of Fisheries Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea
| | - Hae Dae Park
- Department of Biotechnology, College of Fisheries Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea
| | - Jin-Man Kim
- Department of Biotechnology, Chonnam National University, 50, Daehak-ro, Yeosu, 59626, Republic of Korea
| | - In-Soo Kong
- Department of Biotechnology, College of Fisheries Science, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea.
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Abstract
Brown algae include the strongest accumulators of iodine known among living systems. This paper reviews the current state of bioinorganic research in the field, focusing on the models Laminaria digitata, Macrocystis pyrifera and Ectocarpus siliculosus, and covering uptake and efflux, localization and biological significance of storage, as well as marine and atmospheric chemistry of iodine.
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Affiliation(s)
- Frithjof C Küpper
- School of Biological Sciences, University of Aberdeen, Cruickshank Building, St. Machar Drive, Aberdeen AB24 3UU, Scotland, UK
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Thomas F, Cosse A, Le Panse S, Kloareg B, Potin P, Leblanc C. Kelps feature systemic defense responses: insights into the evolution of innate immunity in multicellular eukaryotes. New Phytol 2014; 204:567-576. [PMID: 25041157 DOI: 10.1111/nph.12925] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 06/09/2014] [Indexed: 06/03/2023]
Abstract
Brown algae are one of the few eukaryotic lineages that have evolved complex multicellularity, together with Opisthokonts (animals, fungi) and Plantae (land plants, green and red algae). In these three lineages, biotic stresses induce similar local defense reactions. Animals and land plants also feature a systemic immune response, protecting the whole organism after an attack on one of its parts. However, the occurrence of systemic defenses has never been investigated in brown algae. We elicited selected parts of the kelp Laminaria digitata and monitored distant, nonchallenged areas of the same individual for subsequent defense reactions. A systemic reaction was detected following elicitation on a distant area, including an oxidative response, an increase in haloperoxidase activities and a stronger resistance against herbivory. Based on experiments with pharmacological inhibitors, the liberation of free fatty acids is proposed to play a key role in systemic signaling, reminiscent of what is known in land plants. This study is the first report, outside the phyla of Opisthokonts and Plantae, of an intraorganism communication leading to defense reactions. These findings indicate that systemic immunity emerged independently at least three times, as a consequence of convergent evolution in multicellular eukaryotic lineages.
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Affiliation(s)
- François Thomas
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
- CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
| | - Audrey Cosse
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
- CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
| | - Sophie Le Panse
- Sorbonne Universités, UPMC Univ Paris 06, FR 2424, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
- CNRS, FR 2424, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
| | - Bernard Kloareg
- Sorbonne Universités, UPMC Univ Paris 06, FR 2424, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
- CNRS, FR 2424, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
| | - Philippe Potin
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
- CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
| | - Catherine Leblanc
- Sorbonne Universités, UPMC Univ Paris 06, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
- CNRS, UMR 8227, Integrative Biology of Marine Models, Station Biologique de Roscoff, CS 90074, F-29688, Roscoff Cedex, France
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Ko SJ, Bu Y, Bae J, Bang YM, Kim J, Lee H, Beom-Joon L, Hyun YH, Park JW. Protective effect of Laminaria japonica with probiotics on murine colitis. Mediators Inflamm 2014; 2014:417814. [PMID: 24948848 PMCID: PMC4052192 DOI: 10.1155/2014/417814] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 05/01/2014] [Indexed: 12/30/2022] Open
Abstract
Inflammatory bowel disease (IBD) is a chronically relapsing inflammatory disorder of the gastrointestinal tract. Most IBD treatments are unsatisfactory; therefore, various dietary supplements have emerged as promising interventions. Laminaria japonica (LJ) is an edible seaweed used to regulate digestive symptoms. Probiotics have been reported to improve digestive problems and their simultaneous administration with seaweeds has been shown to produce synergistic therapeutic effects. Here, we investigated the effect of LJ combination with probiotics on dextran sodium sulfate-induced colitis model in mice. Aqueous LJ extracts (LJE) at doses from 100 to 300 mg/kg and probiotics at a dose of 300 mg/kg were orally administered for 7 days. Body weight, colon length, histological score, macroscopic damage, and the levels of cytokines IFN- γ , IL-1 β , IL-6, IL-10, IL-12 (P40), IL-12 (P70), IL-17, and TNF- α were assessed. LJE alone caused a significant improvement of colitis signs such as colon length, histological score, and IL-1 β and IL-6 production. LJE and probiotics demonstrated a synergistic effect by the histological score and levels of IL-1 β , IL-6, and IL-12 (P40) but not IFN- γ , IL-10, and IL-12 (P70). In conclusion, LJE was effective in inducing protection against colitis in mice and acted synergistically with probiotics.
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Affiliation(s)
- Seok-Jae Ko
- College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Youngmin Bu
- College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Jinhyun Bae
- College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Yu-mi Bang
- College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Jinsung Kim
- College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Hyejung Lee
- Acupuncture and Meridian Science Research Center, College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Lee Beom-Joon
- College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
| | - Yoo Hye Hyun
- Department of Pharmacy, College of Pharmacy, Hanyang University, Ansan 426-791, Republic of Korea
| | - Jae-Woo Park
- College of Korean Medicine, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 130-701, Republic of Korea
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Dai H, Hiromasa Y, Takahashi D, VanderVelde D, Fabrick JA, Kanost MR, Krishnamoorthi R. An initial event in the insect innate immune response: structural and biological studies of interactions between β-1,3-glucan and the N-terminal domain of β-1,3-glucan recognition protein. Biochemistry 2013; 52:161-70. [PMID: 23237493 PMCID: PMC3542770 DOI: 10.1021/bi301440p] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In response to invading microorganisms, insect β-1,3-glucan recognition protein (βGRP), a soluble receptor in the hemolymph, binds to the surfaces of bacteria and fungi and activates serine protease cascades that promote destruction of pathogens by means of melanization or expression of antimicrobial peptides. Here we report on the nuclear magnetic resonance (NMR) solution structure of the N-terminal domain of βGRP (N-βGRP) from Indian meal moth (Plodia interpunctella), which is sufficient to activate the prophenoloxidase (proPO) pathway resulting in melanin formation. NMR and isothermal calorimetric titrations of N-βGRP with laminarihexaose, a glucose hexamer containing β-1,3 links, suggest a weak binding of the ligand. However, addition of laminarin, a glucose polysaccharide (~6 kDa) containing β-1,3 and β-1,6 links that activates the proPO pathway, to N-βGRP results in the loss of NMR cross-peaks from the backbone (15)N-(1)H groups of the protein, suggesting the formation of a large complex. Analytical ultracentrifugation (AUC) studies of formation of the N-βGRP-laminarin complex show that ligand binding induces self-association of the protein-carbohydrate complex into a macro structure, likely containing six protein and three laminarin molecules (~102 kDa). The macro complex is quite stable, as it does not undergo dissociation upon dilution to submicromolar concentrations. The structural model thus derived from this study for the N-βGRP-laminarin complex in solution differs from the one in which a single N-βGRP molecule has been proposed to bind to a triple-helical form of laminarin on the basis of an X-ray crystallographic structure of the N-βGRP-laminarihexaose complex [Kanagawa, M., Satoh, T., Ikeda, A., Adachi, Y., Ohno, N., and Yamaguchi, Y. (2011) J. Biol. Chem. 286, 29158-29165]. AUC studies and phenoloxidase activation measurements conducted with the designed mutants of N-βGRP indicate that electrostatic interactions involving Asp45, Arg54, and Asp68 between the ligand-bound protein molecules contribute in part to the stability of the N-βGRP-laminarin macro complex and that a decreased stability is accompanied by a reduced level of activation of the proPO pathway. An increased level of β-1,6 branching in laminarin also results in destabilization of the macro complex. These novel findings suggest that ligand-induced self-association of the βGRP-β-1,3-glucan complex may form a platform on a microbial surface for recruitment of downstream proteases, as a means of amplification of the initial signal of pathogen recognition for the activation of the proPO pathway.
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Affiliation(s)
- Huaien Dai
- Department of Biochemistry, Kansas State University, Manhattan, KS 66506
| | - Yasuaki Hiromasa
- Department of Biochemistry, Kansas State University, Manhattan, KS 66506
| | - Daisuke Takahashi
- Department of Biochemistry, Kansas State University, Manhattan, KS 66506
| | | | - Jeffrey A. Fabrick
- Department of Biochemistry, Kansas State University, Manhattan, KS 66506
| | - Michael R. Kanost
- Department of Biochemistry, Kansas State University, Manhattan, KS 66506
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Makarenkova ID, Akhmatova NK, Semenova IB, Besednova NN, Zviagintseva TN, Shevchenko NM. [Production of cytokines by murine bone marrow dendritic cells in vitro mediated by sulfated polysaccharides obtained from sea brown algae]. Zh Mikrobiol Epidemiol Immunobiol 2010:34-9. [PMID: 21061575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM To assess in vitro cytokine production by murine bone marrow dendritic cells (DC) matured under the effect of sulfated polysaccharides--fucoidanes from sea brown algae Laminaria cichorioides and Laminaria japonica. MATERIALS AND METHODS CBA line mice were used to obtain bone marrow origin precursors of DC. Isolation and study of chemical composition and structure of fucoidanes were performed using modern research methods. Expression of surface markers was determined by flow cytometry (FACS-analysis) using monoclonal antibodies to respective antigens. Levels of cytokine production were measured by t-ELISA using kits manufactured by Biosource (Belgium). RESULTS I was determined that fucoidans induce maturation of DC that was evident by expression of terminal differentiation marker CD83, activation marker CD38, enhanced expression of costimulating CD86, antigen-presenting MHC II and adhesive CD11c molecules. Fucoidanes stimulate DC to produce proinflammatory (TNF-alpha, IL-6, IL-1beta) and regulatory (IL-12) cytokines. Fucoidanes enhance expression of TLR-2 and TLR-4 but do not influence on expression of TLR-9. CONCLUSION It was shown that fucoidanes from sea brown algae L. cichorioides and L. japonica activate innate immunity system that is evident by enhanced expression of surface molecules associated with DC maturation and increased production of proinflammatory and regulatory cytokines by DC. Enhanced expression of TLR-2 and TLR-4 allows to suppose that studied fucoidanes could have anti-infective effect in vivo.
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Mizuno M, Nishitani Y, Tanoue T, Matoba Y, Ojima T, Hashimoto T, Kanazawa K. Quantification and localization of fucoidan in Laminaria japonica using a novel antibody. Biosci Biotechnol Biochem 2009; 73:335-8. [PMID: 19202293 DOI: 10.1271/bbb.80542] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The establishment of a simple technique to determine the concentration of fucoidan was developed by using a monoclonal antibody against fucoidan. This antibody reacted with fucoidans purified from Laminaria japonica Areschoug (Makombu in Japanese) and Kjellmaniella gyrate Miyabe (Gagome), but not with polysaccharides from Undaria pinnatifida Suringar (Wakame). Neither laminarin nor algenic acid, which are constituents in Laminaria japonica, were recognized by the prepared antibody. Application of the enzymed-linked immunosorbent assay (ELISA) inhibition assay increased the specificity of fucoidan in measuring the fucoidan contents. On the basis of these results, it was ascertained that the ELISA inhibition assay of using the anti-fucoidan monoclonal antibody was rapid, accurate, and sensitive in measuring the content of fucoidan. In addition, the localization of fucoidan in Laminaria japonica was investigated. This is the first report of fucoidan being restricted to the outer cortical layer.
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Affiliation(s)
- Masashi Mizuno
- Graduate School of Agricultural Science, Kobe University, Japan.
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Cosse A, Potin P, Leblanc C. Patterns of gene expression induced by oligoguluronates reveal conserved and environment-specific molecular defense responses in the brown alga Laminaria digitata. New Phytol 2009; 182:239-250. [PMID: 19192194 DOI: 10.1111/j.1469-8137.2008.02745.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
* Until now, no information has been available on the transcriptional response to the transduction of defense signals in brown seaweeds that leads to active resistance against pathogens or grazers. * Using a polymerase chain reaction (PCR)-based, subtractive cDNA approach combined with filter arrays we demonstrated that Laminaria digitata exhibits a rapid response to oligoguluronate elicitors. The transcription levels of several genes were validated by quantitative real-time reverse-transcription PCR and further analysed using pharmacological approaches. * Fifty upregulated genes were identified by differential screening in elicited algae over a 24-h time-course. These genes were related to oxidative stress responses, production of antimicrobial secondary compounds or cell wall strengthening. Moreover, pharmacological tests showed that intracellular signal transduction is likely to involve reactive oxygen species. A new oligoguluronate-inducible vanadium-dependent haloperoxidase (vHPO), specific to iodide was also characterized. The transcription of several vHPO genes was shown to be tightly regulated. * Taken together, our data show that early transcriptional defense responses in L. digitata are similar to those in land plants but also include novel defense responses that involve tightly regulated iodine metabolism.
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Affiliation(s)
- Audrey Cosse
- Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie et Curie (UPMC)-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique, BP 74, F-29682, Roscoff, France
| | - Philippe Potin
- Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie et Curie (UPMC)-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique, BP 74, F-29682, Roscoff, France
| | - Catherine Leblanc
- Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie et Curie (UPMC)-Paris 6, UMR 7139 Végétaux marins et Biomolécules, Station Biologique, BP 74, F-29682, Roscoff, France
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Bonneville M, Saint-Mezard P, Benetiere J, Hennino A, Pernet I, Denis A, Nicolas JF. Laminaria ochroleuca extract reduces skin inflammation. J Eur Acad Dermatol Venereol 2007; 21:1124-5. [PMID: 17714147 DOI: 10.1111/j.1468-3083.2006.02111.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Lee IA, Popov AM, Sanina NM, Kostetsky EY, Novikova OD, Reunov AV, Nagorskayaand VP, Shnyrov VL. Morphological and immunological characterization of immunostimulatory complexes based on glycoglycerolipids from Laminaria japonica. Acta Biochim Pol 2004; 51:263-272. [PMID: 15094848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2003] [Revised: 02/11/2004] [Accepted: 02/20/2004] [Indexed: 05/24/2023]
Abstract
Some physicochemical properties of glycoglycerolipids (monogalactosyldiacylglycerol, digalactosyldiacylglycerol and sulfoquinovosyldiacylglycerol) from the sea algae Laminaria japonica, as well as their ability to become incorporate into immunostimulating complexes (ISCOMs), used as a delivery system of microbial and tumor antigens in vesicular form, were studied. These glycolipids were found to differ essentially in fatty acid composition, unsaturation index and thermotropic behavior. The possibility of ISCOM modification by embedding the glycolipids studied instead of a phospholipid component in vesicles was shown. A preliminary research of the immunogenicity of the pore-forming protein from Yersinia pseudotuberculosis in modified (by monogalactosyldiacylglycerol) and typical (egg phosphatidylcholine) ISCOMs did not reveal a significant enhancement of immune response in comparison with that of isolated protein.
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Affiliation(s)
- Irina A Lee
- Pacific Institute of Bioorganic Chemistry FEBRAS, Vladivostok, Russia.
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Abstract
Anaphylaxis following laminaria insertion rarely occurs but may be a life-threatening condition. Laminaria tents, prepared from natural sea kelp, are commonly used prior to elective termination of pregnancy to achieve cervical dilatation. We report herein two cases of anaphylaxis caused by IgE-mediated hypersensitivity to laminaria. Two women, each of whom had undergone at least one previous abortion where a laminaria had been utilized, developed anaphylactic reaction following laminaria insertion. The reaction included urticaria, nausea, breathing difficulty, and hypotension. The patients subsequently underwent skin testing and measurement of serum specific IgE level to laminaria extract, and were shown to elicit positive responses to laminaria. The implication and impact of laminaria allergy on gynecologic procedures are significant and this allergy should be included in the list of differential diagnoses for hypersensitive reaction in gynecologic procedures.
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Affiliation(s)
- Sang-Hoon Kim
- Department of Internal Medicine, College of Medicine, Seoul National University, Seoul, Korea
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Affiliation(s)
- S R Knowles
- Drug Safety Clinic, UG06, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada.
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Affiliation(s)
- D S Cole
- Jacobi Medical Center, Department of Obstetrics, Gynecology, and Women's Health, Albert Einstein College of Medicine, Bronx, New York, USA
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Affiliation(s)
- M T Nguyen
- Department of Allergy, Permanente Medical Group, Oakland, Calif
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Pedersen SS, Espersen F, Høiby N, Shand GH. Purification, characterization, and immunological cross-reactivity of alginates produced by mucoid Pseudomonas aeruginosa from patients with cystic fibrosis. J Clin Microbiol 1989; 27:691-9. [PMID: 2498389 PMCID: PMC267399 DOI: 10.1128/jcm.27.4.691-699.1989] [Citation(s) in RCA: 55] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Alginates from nine mucoid Pseudomonas aeruginosa isolates from patients with cystic fibrosis were purified by repeated ethanol precipitation, nuclease digestion, anion-exchange chromatography, dialysis, and lyophilization. Uronic acid constituted 72% of the dry weight when mannuronolactone was used as the internal standard in the carbazole-borate assay for uronic acids. The average degree of acetylation was 16%, and the ratio of mannuronic acid to gluluronic acid was 4.7. No homopolymeric blocks of guluronic acid were found when analyzed by nuclear magnetic resonance spectroscopy. Contaminating proteins were denatured by heating, and during purification the content of protein relative to alginate fell from 566 to 0.9%. The content of lipopolysaccharide was 0.012%. No immunological or biological activity was attributable to the protein or lipopolysaccharide content as estimated by immunoblotting, enzyme-linked immunosorbent assay (ELISA), and a neutrophil chemotaxis assay. Rabbits were hyperimmunized with P. aeruginosa alginates and alginate from the seaweed Laminaria hyperborea, and an ELISA that detected alginate-specific antibodies was developed. Antibodies to P. aeruginosa alginate were detected by ELISA in 1:4,000 dilutions of serum from patients with cystic fibrosis with chronic P. aeruginosa lung infection. The serological cross-reactions between serum from the nine patients with cystic fibrosis and the corresponding P. aeruginosa alginates were investigated and showed considerable heterogeneity. This finding indicates that P. aeruginosa alginate from more than one P. aeruginosa strain should be used in serological tests. There was no serological cross-reactivity between P. aeruginosa and Laminaria hyperborea alginate in either rabbits or patients with cystic fibrosis.
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Affiliation(s)
- S S Pedersen
- Statens Seruminstitut, Department of Clinical Microbiology, Rigshospitalet, Copenhagen, Denmark
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