Innate Antifungal Immunity: The Key Role of Phagocytes (Annual Review of Immunology Book 29)

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Shearer, Harry W. Schroeder, Jr. Frew, and Cornelia M. This trusted resource features sweeping content updates, rewritten chapters, a highly clinical perspective, and an easy-to-use organization designed to enhance your diagnosis and management skills in daily practice. User-friendly format features color-coded boxes highlighting critical information on Key Concepts, Clinical Pearls, Clinical Relevance, and Therapeutic Principles. Purchase the book. We use cookies to help provide and enhance our service and tailor content and ads. By continuing you agree to the use of cookies. Clinical Immunology Principles and Practice.

Edited by: Robert R. Cornelia M. Browse book content About the book Search in this book. So, the MR may function to bind particles with appropriate saccharide residues, triggering its interaction with plasma membrane partners that promote the cytoskeleton reorganization required for phagocytosis. For example, uptake of apoptotic cells by macrophages and nonprofessional phagocytes, e. Other multimolecular complexes implicated in phagocytic processes often involved CR3 see ref.

Although in macrophages, CR3 was a potential partner of binding receptors to link them to the cytoskeleton and in fine, mediate phagocytosis, we could not demonstrate that CR3 is functionally associated with MR in CHO cells. A cellular model to identify these hMR interactors would be to use COS cells, which may have, like macrophages, the particularity to express a set of protein s required for hMR to mediate phagocytosis, as previously discussed by Ezekowitz and coauthors [ 16 ].

In conclusion, by generating a new expression vector, we have been able to consistantly produce hMR in different cell lines.

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In addition, we propose to reconsider the MR as a binding, rather than a phagocytic receptor. It only mediates ingestion of microorganisms in macrophages and dendritic cells, which specifically express its phagocytic partners. In the other cell types, it might rather work as an endocytic receptor for hormones and glycoproteins, thus participating in serum protein homeostasis.

Human MR cloning strategy. Positions of molecular weight standards are shown on the right in thousands. One experiment representative of three is shown. Left Five subclones obtained from clone 2. MR does not mediate phagocytosis when stably expressed in CHO cells. The percentage of phagocytic cells having ingested at least one particle was measured by fluorescence microscopy by counting at least cells per slide.

CR3 does not cooperate with MR to mediate particles phagocytosis. We gratefully acknowledge Philip D. We thank Jacques Prandi I. We thank P. Stahl, D.

Zerbib, and D. Hodzig for critical reading of the manuscript.


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Journal of Leukocyte Biology Volume 77, Issue 6. Laurent J. Tools Request permission Export citation Add to favorites Track citation. Share Give access Share full text access. Share full text access. Please review our Terms and Conditions of Use and check box below to share full-text version of article. Abstract The macrophage mannose receptor MR appears to play an important role in the binding and phagocytosis of several human pathogens, but its phagocytic property and signaling pathways have been poorly defined.

DNA constructs C.


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  • Infection of cells and phagocytosis assay Three types of particles known to bind to the MR were used: M. Restriction sites mentioned in Materials and Methods are underlined. Figure 1. Open in figure viewer PowerPoint. Figure 2. Figure 3. Figure 4. Google Scholar. Citing Literature. Volume 77 , Issue 6 June Pages Thus, we believe that changes in some of these factors can be improved to observe a reduction in fungal burden in immunized mice since the peptides reduce lesion diameters.

    MST kinases in innate immune signaling

    In our study, the strain utilized was S. In these zoonotic sporotrichosis cases the disease tends to develop disseminated and severe forms 47 , 48 , In zoonotic transmission, the infected cats inoculate high loads of S. This differs from the sapronotic cases that involve the conidia of S. The inoculation of the yeast form is an important factor in the severity and gravity of the S. The yeast form of S. An association with antifungal drugs or different adjuvants could decrease the fungal burden in our vaccine approach.

    In conclusion, from 34 antigenic proteins identified from S. We demonstrated that the ZR8 and ZR3 peptides induce a protective immune response against sporotrichosis. With a longer time of infection in this protective immune response environment or with the addition of antifungal drugs, we would probably observe a decreased fungal burden in immunized mice.

    These data show improved advances in the immune approaches to an anti-fungal vaccine development and identified the ZR8 and ZR3 peptides as vaccine targets for the treatment of subcutaneous sporotrichosis. This study was carried out in accordance with the recommendations of Guide for the Care and Use of Laboratory Animals of the National Institutes of Health. The S. The pellet was macerated with liquid nitrogen and a pestle into a slim powder.

    The second dimension was performed on a Equilibrated strips were placed on polyacrylamide gels and sealed with 0. Images were processed using the ImageMaster 2D Platinum software for protein spots enumeration. After 25 days of infection, the five mice in each group were euthanized in a CO 2 chamber to draw mouse blood by intracardiac puncture. The success of electrotransference was evaluated by Ponceau S Ponceau S 0. Subsequently, the membranes were washed three times with PBS pH 7.

    Briefly, the spots of interest were manually excised 16 spots from the four stained Coomassie gels. Proteins were digested with The digested material was collected and desalted in Milipore Zip-Tip C18 pipette tips. The four most intense peaks were selected and analyzed by Pattern Lab Proteomics for protein identification The database from S.

    The contaminant database and analysis procedures were used in accordance with the system.

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    The search parameters included the variable modification oxidation M and the fixed modification carbamidomethyl C. Up to one missed cleavage site was allowed; the mass tolerance of the peptide was 0. After the protein identifications were analyzed, predictions were made of the affinities of the peptides to MHC class II. We chose the peptides with the best scores in both programs. Since GP70 is an important antigen from the Sporothrix complex, we also chose the sequence from this protein with the best scores in both programs.

    The peptides were synthesized by Life Technologies. The spleens were removed from the mice 15 days after infection. Phytohemagglutinin PHA was used as a positive control. Immunization was repeated 3 times every 7 days. The mice were euthanized 35 days after infection.

    We evaluated the cell profile in the lesion, spleen and lymph nodes from infected mice. The flow cytometry data were analyzed using FlowJo. Fluorescenceminus-one FMO tubes were used as additional controls. The results are expressed as mean standard error SD. Marimon, R. Sporothrix brasiliensis, S. Journal of Clinical Microbiology 45 , — Sporothrix schenckii complex and sporotrichosis, an emerging health problem. Future Microbiology 6 , 85— Mora-Montes, H. Current progress in the biology of members of the Sporothrix schenckii complex following the genomic era.

    FEMS yeast research 15 Sporothrix schenckii and Sporotrichosis.


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