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  1. Article ; Online: Immunosuppressive, antimicrobial and insecticidal activities of inhibitor cystine knot peptides produced by teratocytes of the endoparasitoid wasp Cotesia flavipes (Hymenoptera: Braconidae)

    Pinto, Ciro P. G. / Walker, Andrew A. / King, Glenn F. / Rossi, Guilherme D.

    Insect Science. 2023 Aug., v. 30, no. 4 p.1105-1117

    2023  

    Abstract: Teratocytes are specialized cells released by parasitoid wasps into their hosts. They are known for producing regulatory molecules that aid the development of immature parasitoids. We have recently reported the primary structures of cystine‐rich peptides, ...

    Abstract Teratocytes are specialized cells released by parasitoid wasps into their hosts. They are known for producing regulatory molecules that aid the development of immature parasitoids. We have recently reported the primary structures of cystine‐rich peptides, including some containing inhibitor cystine knot (ICK) motifs, produced by teratocytes of the parasitoid Cotesia flavipes (Hymenoptera: Braconidae). ICKs are known for their stability and diverse biological functions. In this study, we produced four putative ICK peptides from the teratocytes of C. flavipes using solid‐phase peptide synthesis or recombinant expression in E. coli, and investigated their functions on host immune modulation as well their potential to impair the development of two lepidopterans after ingestion of the peptides. In addition, the peptides were assayed against pathogens and human cells. The peptides did not influence total hemocyte count but suppressed cellular immunity, detectable as a reduction of hemocyte encapsulation (CftICK‐I, CftICK‐II, CftICK‐III) and spread indexes (CftICK‐IV) in the host. None of the peptides influenced the activities of prophenoloxidase and phenoloxidase in the hemolymph of larval Diatraea saccharalis (Lepidoptera: Crambidae). CftICK‐I and CftICK‐II with previously unknown function showed antifungal activity against Candida albicans but were non‐toxic to human cells. CftICK‐I, CftICK‐II, and CftICK‐III increased larval mortality and reduced leaf consumption of D. saccharalis, a permissive host for C. flavipes. The CftICK‐III also increased larval mortality and reduced leaf consumption of Spodoptera frugiperda (Lepidoptera: Noctuidae), a non‐permissive host for C. flavipes. This study highlights biological functions and biotechnological potential of ICK peptides from the teratocytes of C. flavipes.
    Keywords Candida albicans ; Cotesia flavipes ; Diatraea saccharalis ; Escherichia coli ; Spodoptera frugiperda ; antifungal properties ; cell-mediated immunity ; cystine ; encapsulation ; endoparasitoids ; hemocytes ; humans ; immunosuppression ; ingestion ; larvae ; leaves ; monophenol monooxygenase ; mortality ; peptides ; prophenoloxidase ; teratocytes ; wasps
    Language English
    Dates of publication 2023-08
    Size p. 1105-1117.
    Publishing place John Wiley & Sons, Ltd
    Document type Article ; Online
    Note JOURNAL ARTICLE
    ZDB-ID 2179775-4
    ISSN 1744-7917 ; 1672-9609
    ISSN (online) 1744-7917
    ISSN 1672-9609
    DOI 10.1111/1744-7917.13154
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Immunosuppressive, antimicrobial and insecticidal activities of inhibitor cystine knot peptides produced by teratocytes of the endoparasitoid wasp Cotesia flavipes (Hymenoptera: Braconidae).

    Pinto, Ciro P G / Walker, Andrew A / King, Glenn F / Rossi, Guilherme D

    Insect science

    2022  Volume 30, Issue 4, Page(s) 1105–1117

    Abstract: Teratocytes are specialized cells released by parasitoid wasps into their hosts. They are known for producing regulatory molecules that aid the development of immature parasitoids. We have recently reported the primary structures of cystine-rich peptides, ...

    Abstract Teratocytes are specialized cells released by parasitoid wasps into their hosts. They are known for producing regulatory molecules that aid the development of immature parasitoids. We have recently reported the primary structures of cystine-rich peptides, including some containing inhibitor cystine knot (ICK) motifs, produced by teratocytes of the parasitoid Cotesia flavipes (Hymenoptera: Braconidae). ICKs are known for their stability and diverse biological functions. In this study, we produced four putative ICK peptides from the teratocytes of C. flavipes using solid-phase peptide synthesis or recombinant expression in E. coli, and investigated their functions on host immune modulation as well their potential to impair the development of two lepidopterans after ingestion of the peptides. In addition, the peptides were assayed against pathogens and human cells. The peptides did not influence total hemocyte count but suppressed cellular immunity, detectable as a reduction of hemocyte encapsulation (CftICK-I, CftICK-II, CftICK-III) and spread indexes (CftICK-IV) in the host. None of the peptides influenced the activities of prophenoloxidase and phenoloxidase in the hemolymph of larval Diatraea saccharalis (Lepidoptera: Crambidae). CftICK-I and CftICK-II with previously unknown function showed antifungal activity against Candida albicans but were non-toxic to human cells. CftICK-I, CftICK-II, and CftICK-III increased larval mortality and reduced leaf consumption of D. saccharalis, a permissive host for C. flavipes. The CftICK-III also increased larval mortality and reduced leaf consumption of Spodoptera frugiperda (Lepidoptera: Noctuidae), a non-permissive host for C. flavipes. This study highlights biological functions and biotechnological potential of ICK peptides from the teratocytes of C. flavipes.
    MeSH term(s) Humans ; Animals ; Wasps ; Hymenoptera ; Cystine ; Insecticides ; Escherichia coli ; Larva ; Moths ; Peptides ; Anti-Infective Agents ; Host-Parasite Interactions
    Chemical Substances Cystine (48TCX9A1VT) ; Insecticides ; Peptides ; Anti-Infective Agents
    Language English
    Publishing date 2022-12-19
    Publishing country Australia
    Document type Journal Article
    ZDB-ID 2179775-4
    ISSN 1744-7917 ; 1672-9609
    ISSN (online) 1744-7917
    ISSN 1672-9609
    DOI 10.1111/1744-7917.13154
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Proteotranscriptomics reveals the secretory dynamics of teratocytes, regulators of parasitization by an endoparasitoid wasp.

    Pinto, Ciro P G / Walker, Andrew A / Robinson, Samuel D / King, Glenn F / Rossi, Guilherme D

    Journal of insect physiology

    2022  Volume 139, Page(s) 104395

    Abstract: Parasitoid wasps have evolved sophisticated mechanisms of host regulation that establish a favorable environment for the development of immature parasitoids. While maternal venom and symbiotic virus-like particles are well-known mechanisms of host ... ...

    Abstract Parasitoid wasps have evolved sophisticated mechanisms of host regulation that establish a favorable environment for the development of immature parasitoids. While maternal venom and symbiotic virus-like particles are well-known mechanisms of host regulation, another less-studied mechanism is the secretion of host regulation factors by cells called teratocytes, extra-embryonic cells released during parasitoid larval eclosion. Consequently, identification and characterization of teratocyte secretory products has not been reported in detail for any parasitoid wasp. We aimed to analyze teratocyte secretory products released into hemolymph of the larval sugarcane borer Diatraea saccharalis (Fabricius, 1794) (Lepidoptera: Crambidae) by its biological control agent, the koinobiont endoparasitoid wasp Cotesia flavipes Cameron, 1891 (Hymenoptera: Braconidae). Teratocytes were released upon eclosion of parasitoid larvae four days after parasitization (DAP) and increased in number and size until six DAP. Total D. saccharalis hemocyte viability was reduced immediately after parasitization until DAP 2, while total hemocyte count was lower from the third DAP, and phenoloxidase and lysozyme activity were disrupted compared to non-parasitized controls. To examine the secretory products of teratocytes, we generated a teratocyte transcriptome and compared its in silico translated open reading frames to mass spectra obtained from hemolymph from parasitized and unparasitized hosts. This led to the identification of 57 polypeptides secreted by teratocytes, the abundance of which we tracked over 0-10 DAP. Abundant teratocyte products included proteins similar to bracovirus proteins and multiple disulfide-rich peptides. Most teratocyte products accumulated in hemolymph, reaching their highest concentrations immediately before parasitoid pupation. Our results provide insights into host regulation by teratocytes and reveal molecules that may be useful in biotechnology.
    MeSH term(s) Animals ; Hemocytes ; Host-Parasite Interactions ; Larva ; Moths ; Polydnaviridae ; Wasps/physiology
    Language English
    Publishing date 2022-04-09
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1879-1611
    ISSN (online) 1879-1611
    DOI 10.1016/j.jinsphys.2022.104395
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: [18]F-fluoroethyl-l-tyrosine positron emission tomography for radiotherapy target delineation: Results from a Radiation Oncology credentialing program.

    Barry, Nathaniel / Koh, Eng-Siew / Ebert, Martin A / Moore, Alisha / Francis, Roslyn J / Rowshanfarzad, Pejman / Hassan, Ghulam Mubashar / Ng, Sweet P / Back, Michael / Chua, Benjamin / Pinkham, Mark B / Pullar, Andrew / Phillips, Claire / Sia, Joseph / Gorayski, Peter / Le, Hien / Gill, Suki / Croker, Jeremy / Bucknell, Nicholas /
    Bettington, Catherine / Syed, Farhan / Jung, Kylie / Chang, Joe / Bece, Andrej / Clark, Catherine / Wada, Mori / Cook, Olivia / Whitehead, Angela / Rossi, Alana / Grose, Andrew / Scott, Andrew M

    Physics and imaging in radiation oncology

    2024  Volume 30, Page(s) 100568

    Abstract: Background and purpose: The [18]F-fluoroethyl-l-tyrosine (FET) PET in Glioblastoma (FIG) study is ...

    Abstract Background and purpose: The [18]F-fluoroethyl-l-tyrosine (FET) PET in Glioblastoma (FIG) study is an Australian prospective, multi-centre trial evaluating FET PET for newly diagnosed glioblastoma management. The Radiation Oncology credentialing program aimed to assess the feasibility in Radiation Oncologist (RO) derivation of standard-of-care target volumes (TV
    Materials and methods: Central review and analysis of TV
    Results: Data from 19 ROs across 10 trial sites (54 initial submissions, 8 resubmissions requested, 4 conditional passes) was assessed with an initial pass rate of 77.8 %; all resubmissions passed. TV
    Conclusions: The credentialing program demonstrated feasibility in successful credentialing of 19 ROs across 10 sites, increasing national expertise in TV
    Language English
    Publishing date 2024-03-13
    Publishing country Netherlands
    Document type Journal Article
    ISSN 2405-6316
    ISSN (online) 2405-6316
    DOI 10.1016/j.phro.2024.100568
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: [WITHDRAWN] Neuron-dependent tuft cell expansion initiates sinonasal allergic Type 2 inflammation.

    Ortiz-Carpena, Jorge F / Inclan-Rico, Juan M / Pastore, Christopher F / Hung, Li-Yin / Wilkerson, William B / Weiner, Molly B / Lin, Cailu / Gentile, Maria Elena / Cohen, Noam A / Saboor, Ishmail Abdus / Vaughan, Andrew E / Rossi, Heather L / Herbert, De'Broski R

    bioRxiv : the preprint server for biology

    2023  

    Abstract: The authors have withdrawn this manuscript owing to inaccuracies in the calculation of tuft cell numbers and errors in the selection of immunofluorescence images used to support our claims. Therefore, the authors do not wish this work to be cited as ... ...

    Abstract The authors have withdrawn this manuscript owing to inaccuracies in the calculation of tuft cell numbers and errors in the selection of immunofluorescence images used to support our claims. Therefore, the authors do not wish this work to be cited as reference for the project. If you have any questions, please contact the corresponding author.
    Language English
    Publishing date 2023-09-19
    Publishing country United States
    Document type Preprint
    DOI 10.1101/2023.07.04.547596
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Immersion Time Determines Performance of Artificial Habitats in Commercial Harbours by Changing Biodiversity of Colonising Invertebrate Assemblages

    Varenne, Alix / Richardson, Laura E. / Radford, Andrew N. / Rossi, F. / Lecaillon, Gilles / Gudefin, Anaïs / Bérenger, Lucas / Abadie, Etienne / Boissery, Pierre / Lenfant, Philippe / Simpson, Stephen D.

    Diversity. 2023 Apr. 01, v. 15, no. 4

    2023  

    Abstract: In highly modified coastal environments, such as commercial harbours, the installation of artificial habitats has garnered support as a means of enhancing local biological recruitment and connectivity. The success of these measures depends largely on the ...

    Abstract In highly modified coastal environments, such as commercial harbours, the installation of artificial habitats has garnered support as a means of enhancing local biological recruitment and connectivity. The success of these measures depends largely on the patterns of species colonisation. Using post-installation monitoring data, we compared the composition of assemblages of invertebrates colonising artificial habitats that were immersed for different periods (~6 vs. ~18 months) in three commercial harbours along the French Mediterranean coast. The artificial habitats were colonised by taxonomically diverse invertebrate assemblages of ecological and economic importance, including molluscs, crustaceans, and echinoids. Composition differed significantly with the immersion time of the artificial habitats, with total abundance, species richness, and evenness being significantly higher after ~18 than after ~6 months of immersion, indicating that long periods are necessary to enrich these new habitats with economically and ecologically important species. These results can inform restoration protocols and emphasise the value of post-installation monitoring programs.
    Keywords invertebrates ; species richness ; Mediterranean region
    Language English
    Dates of publication 2023-0401
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article ; Online
    ZDB-ID 2518137-3
    ISSN 1424-2818
    ISSN 1424-2818
    DOI 10.3390/d15040505
    Database NAL-Catalogue (AGRICOLA)

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  7. Article: Proteotranscriptomics reveals the secretory dynamics of teratocytes, regulators of parasitization by an endoparasitoid wasp

    Pinto, Ciro P.G. / Walker, Andrew A. / Robinson, Samuel D. / King, Glenn F. / Rossi, Guilherme D.

    Journal of insect physiology. 2022 May, June, v. 139

    2022  

    Abstract: Parasitoid wasps have evolved sophisticated mechanisms of host regulation that establish a favorable environment for the development of immature parasitoids. While maternal venom and symbiotic virus-like particles are well-known mechanisms of host ... ...

    Abstract Parasitoid wasps have evolved sophisticated mechanisms of host regulation that establish a favorable environment for the development of immature parasitoids. While maternal venom and symbiotic virus-like particles are well-known mechanisms of host regulation, another less-studied mechanism is the secretion of host regulation factors by cells called teratocytes, extra-embryonic cells released during parasitoid larval eclosion. Consequently, identification and characterization of teratocyte secretory products has not been reported in detail for any parasitoid wasp. We aimed to analyze teratocyte secretory products released into hemolymph of the larval sugarcane borer Diatraea saccharalis (Fabricius, 1794) (Lepidoptera: Crambidae) by its biological control agent, the koinobiont endoparasitoid wasp Cotesia flavipes Cameron, 1891 (Hymenoptera: Braconidae). Teratocytes were released upon eclosion of parasitoid larvae four days after parasitization (DAP) and increased in number and size until six DAP. Total D. saccharalis hemocyte viability was reduced immediately after parasitization until DAP 2, while total hemocyte count was lower from the third DAP, and phenoloxidase and lysozyme activity were disrupted compared to non-parasitized controls. To examine the secretory products of teratocytes, we generated a teratocyte transcriptome and compared its in silico translated open reading frames to mass spectra obtained from hemolymph from parasitized and unparasitized hosts. This led to the identification of 57 polypeptides secreted by teratocytes, the abundance of which we tracked over 0–10 DAP. Abundant teratocyte products included proteins similar to bracovirus proteins and multiple disulfide-rich peptides. Most teratocyte products accumulated in hemolymph, reaching their highest concentrations immediately before parasitoid pupation. Our results provide insights into host regulation by teratocytes and reveal molecules that may be useful in biotechnology.
    Keywords Cotesia flavipes ; Diatraea saccharalis ; biological control agents ; biotechnology ; computer simulation ; eclosion ; endoparasitoids ; hemocytes ; lysozyme ; monophenol monooxygenase ; parasitic wasps ; parasitism ; polypeptides ; pupation ; secretion ; teratocytes ; transcriptome ; venoms ; viability ; wasps
    Language English
    Dates of publication 2022-05
    Publishing place Elsevier Ltd
    Document type Article
    ISSN 0022-1910
    DOI 10.1016/j.jinsphys.2022.104395
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Venom composition of the endoparasitoid wasp Cotesia flavipes (Hymenoptera: Braconidae) and functional characterization of a major venom peptide.

    Pinto, Ciro P G / Walker, Andrew A / Robinson, Samuel D / Chin, Yanni K-Y / King, Glenn F / Rossi, Guilherme D

    Toxicon : official journal of the International Society on Toxinology

    2021  Volume 202, Page(s) 1–12

    Abstract: Endoparasitoid wasps use complex biochemical arsenals to suppress the normal humoral and cellular immune responses of their hosts in order to transform them into a suitable environment for development of their eggs and larvae. Venom injected during ... ...

    Abstract Endoparasitoid wasps use complex biochemical arsenals to suppress the normal humoral and cellular immune responses of their hosts in order to transform them into a suitable environment for development of their eggs and larvae. Venom injected during oviposition is a key component of this arsenal, but the functions of individual venom toxins are still poorly understood. Furthermore, there has been little investigation of the potential biotechnological use of these venom toxins, for example for control of agricultural pests. The endoparasitoid Cotesia flavipes (Hymenoptera: Braconidae) is a biocontrol agent reared in biofactories and released extensively in Brazil to control the sugarcane borer Diatraea saccharalis (Lepidoptera: Crambidae). The objectives of this work were to reveal venom components produced by C. flavipes and explore the function of a major venom peptide, Cf4. Using a combined proteomic/transcriptomic approach, we identified 38 putative venom toxins including both linear and disulfide-rich peptides, hydrolases, protease inhibitors, apolipophorins, lipid-binding proteins, and proteins of the odorant binding families. Because of its high abundance in the venom, we selected Cf4, a 33-residue peptide with three disulfide bonds, for synthesis and further characterization. We found that synthetic Cf4 reduced the capacity of D. saccharalis hemocytes to encapsulate foreign bodies without any effect on phenoloxidase activity, consistent with a role in disruption of the cellular host immune response. Feeding leaves coated with Cf4 to neonate D. saccharalis resulted in increased mortality and significantly reduced feeding compared to caterpillars fed untreated leaves, indicating that Cf4 is a potential candidate for insect pest control through ingestion. This study adds to our knowledge of endoparasitoid wasp venoms composition, host regulation mechanisms and their biotechnological potential for pest management.
    MeSH term(s) Animals ; Female ; Host-Parasite Interactions ; Humans ; Infant, Newborn ; Moths ; Peptides ; Proteomics ; Wasp Venoms ; Wasps
    Chemical Substances Peptides ; Wasp Venoms
    Language English
    Publishing date 2021-09-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 204479-1
    ISSN 1879-3150 ; 0041-0101
    ISSN (online) 1879-3150
    ISSN 0041-0101
    DOI 10.1016/j.toxicon.2021.09.002
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Trefoil Factor Family: A Troika for Lung Repair and Regeneration.

    Rossi, Heather L / Ortiz-Carpena, Jorge F / Tucker, Devon / Vaughan, Andrew E / Mangalmurti, Nilam S / Cohen, Noam A / Herbert, De'Broski R

    American journal of respiratory cell and molecular biology

    2021  Volume 66, Issue 3, Page(s) 252–259

    Abstract: Tissue damage in the upper and lower airways caused by mechanical abrasion, noxious chemicals, or pathogenic organisms must be followed by rapid restorative processes; otherwise, persistent immunopathology and disease may ensue. This review will discuss ... ...

    Abstract Tissue damage in the upper and lower airways caused by mechanical abrasion, noxious chemicals, or pathogenic organisms must be followed by rapid restorative processes; otherwise, persistent immunopathology and disease may ensue. This review will discuss evidence for the important role served by trefoil factor (TFF) family members in healthy and diseased airways of humans and rodents. Collectively, these peptides serve to both maintain and restore homeostasis through their regulation of the mucous layer and their control of cell motility, cell differentiation, and immune function in the upper and lower airways. We will also discuss important differences in which trefoil member tracks with homeostasis and disease between humans and mice, which poses a challenge for research in this area. Moreover, we discuss new evidence supporting newly identified receptor binding partners in the leucine-rich repeat and immunoglobulin-like domain-containing NoGo (LINGO) family in mediating the biological effects of TFF proteins in mouse models of epithelial repair and infection. Recent advances in our knowledge regarding TFF peptides suggest that they may be reasonable therapeutic targets in the treatment of upper and lower airway diseases of diverse etiologies. Further work understanding their role in airway homeostasis, repair, and inflammation will benefit from these newly uncovered receptor-ligand interactions.
    MeSH term(s) Animals ; Lung/metabolism ; Mice ; Peptides/metabolism ; Proteins ; Trefoil Factor-2 ; Trefoil Factors
    Chemical Substances Peptides ; Proteins ; Trefoil Factor-2 ; Trefoil Factors
    Language English
    Publishing date 2021-11-16
    Publishing country United States
    Document type Journal Article ; Review ; Research Support, N.I.H., Extramural
    ZDB-ID 1025960-0
    ISSN 1535-4989 ; 1044-1549
    ISSN (online) 1535-4989
    ISSN 1044-1549
    DOI 10.1165/rcmb.2021-0373TR
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Skin cancer in skin of color.

    Alexis, Andrew F / Rossi, Anthony M

    Cutis

    2012  Volume 89, Issue 5, Page(s) 208–211

    MeSH term(s) Continental Population Groups ; Delayed Diagnosis ; Health Services Accessibility ; Humans ; Melanoma/diagnosis ; Melanoma/ethnology ; Melanoma/pathology ; Prognosis ; Skin Neoplasms/diagnosis ; Skin Neoplasms/ethnology ; Skin Neoplasms/pathology ; Skin Pigmentation
    Language English
    Publishing date 2012-05
    Publishing country United States
    Document type Editorial
    ZDB-ID 391840-3
    ISSN 0011-4162 ; 0151-9522
    ISSN 0011-4162 ; 0151-9522
    Database MEDical Literature Analysis and Retrieval System OnLINE

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