1
|
Rečnik LM, Cantelli C, Fersing C, Gongora C, Pouget JP, Lisowski V. Synthesis and in vitro antitumour activity of carboplatin analogues containing functional handles compatible for conjugation to drug delivery systems. Bioorg Med Chem Lett 2020; 30:127527. [PMID: 32890684 DOI: 10.1016/j.bmcl.2020.127527] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/29/2020] [Revised: 08/27/2020] [Accepted: 08/27/2020] [Indexed: 10/23/2022]
Abstract
We describe herein the synthesis of a series of carboplatin derivatives with different functional groups at position 3 of the cyclobutane ring. This pharmacomodulation approach aims at facilitating the vectorisation of these analogues, via their subsequent conjugation to a drug delivery system. Five different derivatives bearing a hydroxy, keto, iodo, azido or amino function at position 3 were synthesised. One of these compounds was coupled to a bifunctional maleimide-containing linker. All compounds were tested in vitro for their cytotoxicity on four different cell lines including two platinum-resistant colorectal cancer cell line (SK-OV-3, HCT116, D3E2, D5B7) using an MTS assay. Overall, the tested compounds were up to six times more potent than carboplatin, especially on D5B7 human colorectal cancer cells. We demonstrated that these modifications led to potent analogues which are compatible with conjugation to a drug delivery system.
Collapse
Affiliation(s)
- Lisa-Maria Rečnik
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France; Institut de Recherche en Cancérologie de Montpellier, INSERM, Université de Montpellier, Institut Régional du Cancer de Montpellier, 208 Avenue des Apothicaires, 34298 Montpellier Cedex 5, France
| | - Christophe Cantelli
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France; Institut de Recherche en Cancérologie de Montpellier, INSERM, Université de Montpellier, Institut Régional du Cancer de Montpellier, 208 Avenue des Apothicaires, 34298 Montpellier Cedex 5, France
| | - Cyril Fersing
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France; Nuclear Medicine Department, Montpellier Cancer Institute (ICM), University of Montpellier, 208 Avenue des Apothicaires, 34298 Montpellier Cedex 5, France
| | - Céline Gongora
- Institut de Recherche en Cancérologie de Montpellier, INSERM, Université de Montpellier, Institut Régional du Cancer de Montpellier, 208 Avenue des Apothicaires, 34298 Montpellier Cedex 5, France
| | - Jean-Pierre Pouget
- Institut de Recherche en Cancérologie de Montpellier, INSERM, Université de Montpellier, Institut Régional du Cancer de Montpellier, 208 Avenue des Apothicaires, 34298 Montpellier Cedex 5, France
| | - Vincent Lisowski
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 15 Avenue Charles Flahault, 34093 Montpellier Cedex 5, France.
| |
Collapse
|
2
|
Fersing C, Bouhlel A, Cantelli C, Garrigue P, Lisowski V, Guillet B. A Comprehensive Review of Non-Covalent Radiofluorination Approaches Using Aluminum [ 18F]fluoride: Will [ 18F]AlF Replace 68Ga for Metal Chelate Labeling? Molecules 2019; 24:molecules24162866. [PMID: 31394799 PMCID: PMC6719958 DOI: 10.3390/molecules24162866] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 07/31/2019] [Accepted: 08/06/2019] [Indexed: 12/20/2022] Open
Abstract
Due to its ideal physical properties, fluorine-18 turns out to be a key radionuclide for positron emission tomography (PET) imaging, for both preclinical and clinical applications. However, usual biomolecules radiofluorination procedures require the formation of covalent bonds with fluorinated prosthetic groups. This drawback makes radiofluorination impractical for routine radiolabeling, gallium-68 appearing to be much more convenient for the labeling of chelator-bearing PET probes. In response to this limitation, a recent expansion of the 18F chemical toolbox gave aluminum [18F]fluoride chemistry a real prominence since the late 2000s. This approach is based on the formation of an [18F][AlF]2+ cation, complexed with a 9-membered cyclic chelator such as NOTA, NODA or their analogs. Allowing a one-step radiofluorination in an aqueous medium, this technique combines fluorine-18 and non-covalent radiolabeling with the advantage of being very easy to implement. Since its first reports, [18F]AlF radiolabeling approach has been applied to a wide variety of potential PET imaging vectors, whether of peptidic, proteic, or small molecule structure. Most of these [18F]AlF-labeled tracers showed promising preclinical results and have reached the clinical evaluation stage for some of them. The aim of this report is to provide a comprehensive overview of [18F]AlF labeling applications through a description of the various [18F]AlF-labeled conjugates, from their radiosynthesis to their evaluation as PET imaging agents.
Collapse
Affiliation(s)
- Cyril Fersing
- Institut de Recherche en Cancérologie de Montpellier (IRCM), University of Montpellier, INSERM U1194, Montpellier Cancer Institute (ICM), 34298 Montpellier, France.
- Nuclear Medicine Department, Montpellier Cancer Institute (ICM), University of Montpellier, 208 Avenue des Apothicaires, 34298 Montpellier CEDEX 5, France.
| | - Ahlem Bouhlel
- CERIMED, Aix-Marseille University, 13005 Marseille, France
- Centre de recherche en CardioVasculaire et Nutrition (C2VN), Aix-Marseille University, INSERM 1263, INRA 1260, 13385 Marseille, France
| | - Christophe Cantelli
- Institut de Recherche en Cancérologie de Montpellier (IRCM), University of Montpellier, INSERM U1194, Montpellier Cancer Institute (ICM), 34298 Montpellier, France
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 34093 Montpellier CEDEX, France
| | - Philippe Garrigue
- CERIMED, Aix-Marseille University, 13005 Marseille, France
- Centre de recherche en CardioVasculaire et Nutrition (C2VN), Aix-Marseille University, INSERM 1263, INRA 1260, 13385 Marseille, France
- Department of Nuclear Medicine, Aix-Marseille University, Assistance Publique-Hôpitaux de Marseille (AP-HM), 13385 Marseille, France
| | - Vincent Lisowski
- Institut des Biomolécules Max Mousseron, UMR 5247, CNRS, Université de Montpellier, ENSCM, UFR des Sciences Pharmaceutiques et Biologiques, 34093 Montpellier CEDEX, France
| | - Benjamin Guillet
- CERIMED, Aix-Marseille University, 13005 Marseille, France
- Centre de recherche en CardioVasculaire et Nutrition (C2VN), Aix-Marseille University, INSERM 1263, INRA 1260, 13385 Marseille, France
- Department of Nuclear Medicine, Aix-Marseille University, Assistance Publique-Hôpitaux de Marseille (AP-HM), 13385 Marseille, France
| |
Collapse
|
3
|
Castera-Ducros C, Paloque L, Verhaeghe P, Casanova M, Cantelli C, Hutter S, Tanguy F, Laget M, Remusat V, Cohen A, Crozet MD, Rathelot P, Azas N, Vanelle P. Targeting the human parasite Leishmania donovani: Discovery of a new promising anti-infectious pharmacophore in 3-nitroimidazo[1,2-a]pyridine series. Bioorg Med Chem 2013; 21:7155-64. [DOI: 10.1016/j.bmc.2013.09.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Revised: 08/29/2013] [Accepted: 09/01/2013] [Indexed: 10/26/2022]
|
4
|
Polonelli L, Séguy N, Conti S, Gerloni M, Bertolotti D, Cantelli C, Magliani W, Cailliez JC. Monoclonal yeast killer toxin-like candidacidal anti-idiotypic antibodies. Clin Diagn Lab Immunol 1997; 4:142-6. [PMID: 9067647 PMCID: PMC170493 DOI: 10.1128/cdli.4.2.142-146.1997] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Rat monoclonal yeast killer toxin (KT)-like immunoglobulin M (IgM) anti-idiotypic antibodies (KT-IdAbs) were produced by idiotypic vaccination with a mouse monoclonal antibody (MAb; MAb KT4) that neutralized a Pichia anomala KT characterized by a wide spectrum of antimicrobial activity. The characteristics of the KT-IdAbs were demonstrated by their capacity to compete with the KT to the idiotype of MAb KT4 and to interact with putative KT cell wall receptors (KTRs) of sensitive Candida albicans cells. The internal-image properties of KT-IdAbs were proven by their killer activity against KT-sensitive yeasts. This lethal effect was abolished by prior adsorption of KT-IdAbs with MAb KT4. These findings stressed the potential importance of antibody-mediated immunoprotection against candidiasis and suggested a feasible experimental approach for producing antimicrobial receptor antibodies without purifying the receptor. KT-IdAbs might represent the basis for producing engineered derivatives with a high potential for effective therapeutic antifungal activity.
Collapse
Affiliation(s)
- L Polonelli
- Istituto di Microbiologia, Facoltà di Medicina e Chirurgia, Università degli Studi di Parma, Italy.
| | | | | | | | | | | | | | | |
Collapse
|
5
|
Trinel PA, Cantelli C, Bernigaud A, Jouault T, Poulain D. Evidence for different mannosylation processes involved in the association of beta-1,2-linked oligomannosidic epitopes in Candida albicans mannan and phospholipomannan. Microbiology (Reading) 1996; 142 ( Pt 8):2263-70. [PMID: 8760938 DOI: 10.1099/13500872-142-8-2263] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A monoclonal antibody specific for beta-1,2-linked oligomannosides was used to study the association of these residues with Candida albicans mannan and phospholipomannan (PLM) in relation to growth conditions and in mannan mutant strains. Double immunofluorescence assays performed on cells grown under standard conditions indicated a highly heterogeneous cell surface expression of these epitopes in comparison with the homogeneous expression of alpha-linked oligomannosidic epitopes. Growth in the presence of tunicamycin, which inhibits mannan N-glycosylation, resulted in an absence of beta-1,2-oligomannosidic epitopes on the cell surface, although PLM synthesis still occurred as shown by autoradiography. Similarly, growth in acidic conditions, which inhibits the incorporation of beta-1,2-oligomannosides in mannan, resulted in an absence of beta-1,2-oligomannosidic epitopes at the cell surface, although they still associated with PLM as shown by Western blotting. Western blots of C. albicans mutant strains with reduced amounts or an absence of phosphorus and acid-labile beta-1,2-oligomannosides in their mannan confirmed that the association of beta-1,2-linked oligomannosides with mannan and with PLM involves different mannosylation processes.
Collapse
Affiliation(s)
- P A Trinel
- Unité 42, Institut National de la Santé et de la Recherche Médicale, Villeneuve d'Ascq, France
| | | | | | | | | |
Collapse
|
6
|
Conti S, Cantelli C, Gerloni M, Fisicaro P, Magliani W, Bertolotti D, Mozzoni P, Sullivan D, Coleman D, Polonelli L. Killer factor interference in mixed opportunistic yeast cultures. Mycopathologia 1996; 135:1-8. [PMID: 9008877 DOI: 10.1007/bf00436568] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [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: 02/03/2023]
Abstract
The interaction of the killer yeast Pichia anomala UP 25F with the killer toxin-sensitive clinical isolate Candida albicans UCSC 10S and its natural toxin-resistant mutant derivative C. albicans UCSC 10R were studied under various conditions. A differential inhibition was shown to occur in vitro at pH and temperature values, which are not encountered in vivo, only by using preformed killer toxin, since antagonism due to yeast growth proved to be predominant on the killer effect. Under adverse growth conditions, the P. anomala killer yeast proved to be able to produce an anatoxin antigenically related to the active or heat inactivated killer toxin. These findings suggest that killer toxins may not function as potential virulence factors in the competition between the opportunistic killer yeast P. anomala and sensitive microorganisms for colonization in the course of natural human infections.
Collapse
Affiliation(s)
- S Conti
- Istituto di Microbiologia, Facoltà di Medicina e Chirurgia, Università degli Studi di Parma, Italia
| | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Pitzurra L, Polonelli L, Cantelli C, Gerloni M, Ponton J, Bikandi J, Blasi E. Candida albicans stress mannoprotein, SMP200, enhances tumour necrosis factor secretion in the murine macrophage cell line ANA-1. J Med Vet Mycol 1996; 34:219-22. [PMID: 8803805 DOI: 10.1080/02681219680000371] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Tumour necrosis factor (TNF) secretory activity has been studied in the murine macrophage cell line ANA-1 following in vitro exposure to Candida albicans 200 kDa stress mannoprotein (SMP200). Treatment of ANA-1 murine macrophages with 200 kDa stress mannoprotein results in increased TNF secretion. The phenomenon is (i) dose- and time-dependent, (ii) abrogated by 200 kDa stress mannoprotein preincubation with a specific monoclonal antibody, and (iii) dependent on intact murine macrophage Ca2+/calmodulin-dependent protein kinase function.
Collapse
Affiliation(s)
- L Pitzurra
- Department of Experimental Medicine and Biochemical Sciences, University of Perugia, Italy
| | | | | | | | | | | | | |
Collapse
|
8
|
Polonelli L, De Bernadis F, Conti S, Boccanera M, Magliani W, Gerloni M, Cantelli C, Cassone A. Human natural yeast killer toxin-like candidacidal antibodies. J Immunol 1996; 156:1880-5. [PMID: 8596040] [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] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A murine mAb (mAbKT4, IgG1) that neutralized in vitro the anti-Candida activity of a killer toxic (KT) from the yeast Pichia anomala acted as an idiotypic (Id) vaccine in eliciting anti-Id Abs with toxin-like activity (KT-IdAb) in a rat vaginitis model. In this study, we demonstrate that intravaginal or intragastric inoculations of Candida albicans bearing a receptor for the toxin was able to recall KT-IdAb production in the vagina of the animals primarily immunized with mAbKT4 and also to elicit by themselves an Ab that functionally mimicked the KT (KTAb). Anti-Id-like, KT-like Abs were also consistently found in the vaginal fluid of human vaginitis patients who were infected by Candida but who had never been exposed to the Id vaccine. These Abs were as candidacidal in vitro as those raised in rat vagina by the Id vaccination, and, likewise, their cytocidal effect was totally neutralized by previous reaction with mAbKT4. Importantly, they were also able to confer a significant anticandidal protection in the rat vaginitis model, comparable to that achievable by KT-IdAb passively transferred to naive rats from Id-vaccinated animals. Thus, candidacidal Abs representing the internal image of a yeast KT are part of the Ab repertoire that follows infection or immunization with Candida. It is speculated that the host's immune system response may exploit the KT receptor of microbial pathogens to produce microbicidal Abs, possibly mirroring competition events among microorganisms in natural habitats.
Collapse
MESH Headings
- Administration, Intravaginal
- Animals
- Antibodies, Anti-Idiotypic/biosynthesis
- Antibodies, Anti-Idiotypic/physiology
- Antibodies, Anti-Idiotypic/therapeutic use
- Antibodies, Fungal/biosynthesis
- Antibodies, Fungal/physiology
- Antibodies, Fungal/therapeutic use
- Candida albicans/immunology
- Candidiasis, Vulvovaginal/immunology
- Candidiasis, Vulvovaginal/prevention & control
- Female
- Humans
- Immunity, Innate
- Killer Factors, Yeast
- Mycotoxins/immunology
- Pichia/immunology
- Rats
- Vagina/immunology
Collapse
Affiliation(s)
- L Polonelli
- Institute of Microbiology, University of Parma, Italy
| | | | | | | | | | | | | | | |
Collapse
|
9
|
Polonelli L, De Bernadis F, Conti S, Boccanera M, Magliani W, Gerloni M, Cantelli C, Cassone A. Human natural yeast killer toxin-like candidacidal antibodies. The Journal of Immunology 1996. [DOI: 10.4049/jimmunol.156.5.1880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
A murine mAb (mAbKT4, IgG1) that neutralized in vitro the anti-Candida activity of a killer toxic (KT) from the yeast Pichia anomala acted as an idiotypic (Id) vaccine in eliciting anti-Id Abs with toxin-like activity (KT-IdAb) in a rat vaginitis model. In this study, we demonstrate that intravaginal or intragastric inoculations of Candida albicans bearing a receptor for the toxin was able to recall KT-IdAb production in the vagina of the animals primarily immunized with mAbKT4 and also to elicit by themselves an Ab that functionally mimicked the KT (KTAb). Anti-Id-like, KT-like Abs were also consistently found in the vaginal fluid of human vaginitis patients who were infected by Candida but who had never been exposed to the Id vaccine. These Abs were as candidacidal in vitro as those raised in rat vagina by the Id vaccination, and, likewise, their cytocidal effect was totally neutralized by previous reaction with mAbKT4. Importantly, they were also able to confer a significant anticandidal protection in the rat vaginitis model, comparable to that achievable by KT-IdAb passively transferred to naive rats from Id-vaccinated animals. Thus, candidacidal Abs representing the internal image of a yeast KT are part of the Ab repertoire that follows infection or immunization with Candida. It is speculated that the host's immune system response may exploit the KT receptor of microbial pathogens to produce microbicidal Abs, possibly mirroring competition events among microorganisms in natural habitats.
Collapse
Affiliation(s)
- L Polonelli
- Institute of Microbiology, University of Parma, Italy
| | - F De Bernadis
- Institute of Microbiology, University of Parma, Italy
| | - S Conti
- Institute of Microbiology, University of Parma, Italy
| | - M Boccanera
- Institute of Microbiology, University of Parma, Italy
| | - W Magliani
- Institute of Microbiology, University of Parma, Italy
| | - M Gerloni
- Institute of Microbiology, University of Parma, Italy
| | - C Cantelli
- Institute of Microbiology, University of Parma, Italy
| | - A Cassone
- Institute of Microbiology, University of Parma, Italy
| |
Collapse
|
10
|
Pontón J, Hernando FL, Moragues MD, Barea PL, Gerloni M, Conti S, Fisicaro P, Cantelli C, Polonelli L. Candida albicans stress mannoproteins expression in superficial and systemic candidiasis. Stress mannoproteins in Candida albicans. Mycopathologia 1996; 133:89-94. [PMID: 8751828 DOI: 10.1007/bf00439119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [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: 02/02/2023]
Abstract
The presence of heat shock mannoproteins (HSMPs) reactive with sIgA was demonstrated in several C. albicans strains. The subculture of the C. albicans isolated from mucosal surfaces on Sabouraud's dextrose agar at 25 degrees C switched off the HSMP expression. A re-expression of the HSMPs was obtained in the same medium by shifting the temperature of incubation to 37 degrees C. However, expression of HSMPs in two strains isolated from deep infections was maintained during several subcultures on Sabouraud's dextrose agar at 25 degrees C. A glycoprotein of 200 kDa seemed to be the main HSMP reacting with vaginal sIgA. The data presented in this study suggest that factors other than temperature can influence the expression of C. albicans HSMPs and therefore these antigens should be referred as stress mannoproteins.
Collapse
Affiliation(s)
- J Pontón
- Departamento de Inmunologia, Microbiologia y Parasitología, Facultad de Medicina y Odontologia, Universidad del Pais Vasco, Bilbao, Spain.
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
Cantelli C, Trinel PA, Bernigaud A, Jouault T, Polonelli L, Poulain D. Mapping of beta-1,2-linked oligomannosidic epitopes among glycoconjugates of Candida species. Microbiology (Reading) 1995; 141 ( Pt 10):2693-7. [PMID: 7582029 DOI: 10.1099/13500872-141-10-2693] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The distribution of beta-1,2-linked oligomannosides among glycoconjugates of various Candida species was investigated by Western blotting, using monoclonal and polyclonal antibodies which react with these epitopes. Expression of beta-1,2-linked oligomannosidic epitopes on a 14-18 kDa polydisperse antigen nonreactive with concanavalin A (ConA), previously identified as a C. albicans serotype A phospholipomannan (PLM), appeared to be restricted to C. albicans serotypes A and B (including var. C. stellatoidea types I and II) and C. tropicalis. In C. albicans, beta-1,2-linked oligomannosidic epitopes also appeared to be slightly associated with high molecular mass (> 100 kDa) polydisperse ConA-reactive mannoproteins. For all the other Candida strains investigated, belonging to the species C. parapsilosis, C. krusei, C. glabrata and C. robusta (S. cerevisiae), beta-1,2-linked oligomannosidic epitopes were found to be present in association with medium molecular mass (18-100 kDa) and high molecular mass ConA-reactive mannoproteins, giving reproducible labelling profiles that varied between species.
Collapse
Affiliation(s)
- C Cantelli
- Unité 42, Institut National de la Santé et de la Recherche Médicale, Domaine du CERTIA, Villeneuve d'Ascq, France
| | | | | | | | | | | |
Collapse
|
12
|
Polonelli L, Gerloni M, Conti S, Fisicaro P, Cantelli C, Portincasa P, Almondo F, Barea PL, Hernando FL, Ponton J. Heat-shock mannoproteins as targets of secretory IgA in Candida albicans. J Infect Dis 1994; 169:1401-5. [PMID: 7515089 DOI: 10.1093/infdis/169.6.1401] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.8] [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: 01/25/2023] Open
Abstract
The expression of Candida albicans antigenic determinants reacting with secretory IgA from patients with oral and vaginal candidiasis was investigated under different in vitro conditions. Reversible antigenic transitions were inducible in synthetic medium by temperature shifts, as the yeast cells were positive by an indirect immunofluorescence assay after being incubated at 37 degrees C but not at 25 degrees C. In vitro temperature-inducible C. albicans antigenic determinants reactive with secretory IgA were characterized by radioimmune Western blot as mannoproteins with molecular masses of 180-200, 130-150, 90-110, and 60-70 kDa. This is the first report on the expression of mannoproteins regulated by temperature involved in the secretory immune response during mucosal candidiasis.
Collapse
Affiliation(s)
- L Polonelli
- Istituto di Microbiologia, Università degli Studi di Parma, Italy
| | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Cailliez JC, Cantelli C, Séguy N, Conti S, Gerloni M, Morace G, Polonelli L. Killer toxin secretion through the cell wall of the yeast Pichia anomala. Mycopathologia 1994; 126:173-7. [PMID: 7935732 DOI: 10.1007/bf01103772] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [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: 01/27/2023]
Abstract
A secreted killer toxin was detected through the cell wall of Pichia anomala cells by ultrastructural immunodetection with a specific monoclonal antibody (MAb KT4). MAb KT4 was successively detected by colloidal gold labeled streptavidin and biotinylated anti-mouse F(ab')2 antibodies. The antigenic determinants of the toxin were localized throughout the cytoplasm and the cell wall of killer yeast cells. The Lowicryl K4M-immunogold method gave very satisfactory results and showed that the killer toxin was somewhat concentrated in the yeast cell wall layers before being exported into the medium. In agreement with previous reports, the binding of MAb KT4 suggested that the P. anomala killer toxin secretion did not result from a homogeneous diffusion across the yeast cell wall.
Collapse
Affiliation(s)
- J C Cailliez
- Unité 42, Institut National de la Santé et de la Recherche Médicale, Villeneuve d'Ascq, France
| | | | | | | | | | | | | |
Collapse
|
14
|
Cailliez J, Cantelli C, Conti S, Gerloni M, Magliani W, Morace G, Polonelli L. Pichia anomalakiller toxin secretion in the presence of tunicamycin. Med Mycol 1993. [DOI: 10.1080/02681219380000411] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
|
15
|
Abstract
A monoclonal antibody (mAb KT4), produced against a Pichia anomala killer toxin, was used to study the secretion process of toxin producing cells. The indirect immunofluorescence assay, performed with large concentrations of mAb KT4, showed a homogeneous distribution of the epitope at the cell surface of the P anomala cells. When increasing dilutions of mAb KT4 were employed, a 'punctuated' labeling appeared on the yeast's cell wall which suggested a heterogeneous secretion of the killer toxin. Similar labeling was also observed by immunodetection on live yeast cells held in buffered suspension. These results confirmed that 'punctuated' labeling was not an artefact due to a distortion of the cell's shape by having been dried on glass slides. Indirect immunodetection was performed in electron microscopy on ultra-thin sections of cells embedded in Araldite resin. The labeling thus obtained showed both the presence of the epitope in the cytoplasm and its sensitivity to strong glutaraldehyde fixation. Indirect immunodetection, performed on ultra-thin frozen sections, showed a cytoplasmic and cell wall labelling. However, the amount of gold particles observed in the cell wall was too low to confirm the heterogeneous killer toxin secretion observed in immunofluorescence. In this case, killer cells were fixed with a low concentration of glutaraldehyde which preserved the structure of the epitope complementary with mAb KT4.
Collapse
Affiliation(s)
- J C Cailliez
- Istituto di Microbiologia, Università degli Studi di Parma, Italy
| | | | | | | | | | | |
Collapse
|