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Bose S, Sahu SR, Dutta A, Acharya N. A chemically induced attenuated strain of Candida albicans generates robust protective immune responses and prevents systemic candidiasis development. eLife 2024; 13:RP93760. [PMID: 38787374 PMCID: PMC11126311 DOI: 10.7554/elife.93760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2024] Open
Abstract
Despite current antifungal therapy, invasive candidiasis causes >40% mortality in immunocompromised individuals. Therefore, developing an antifungal vaccine is a priority. Here, we could for the first time successfully attenuate the virulence of Candida albicans by treating it with a fungistatic dosage of EDTA and demonstrate it to be a potential live whole cell vaccine by using murine models of systemic candidiasis. EDTA inhibited the growth and biofilm formation of C. albicans. RNA-seq analyses of EDTA-treated cells (CAET) revealed that genes mostly involved in metal homeostasis and ribosome biogenesis were up- and down-regulated, respectively. Consequently, a bulky cell wall with elevated levels of mannan and β-glucan, and reduced levels of total monosomes and polysomes were observed. CAET was eliminated faster than the untreated strain (Ca) as found by differential fungal burden in the vital organs of the mice. Higher monocytes, granulocytes, and platelet counts were detected in Ca- vs CAET-challenged mice. While hyper-inflammation and immunosuppression caused the killing of Ca-challenged mice, a critical balance of pro- and anti-inflammatory cytokines-mediated immune responses are the likely reasons for the protective immunity in CAET-infected mice.
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Affiliation(s)
- Swagata Bose
- Department of Infectious Disease Biology, Institute of Life SciencesBhubaneswarIndia
| | - Satya Ranjan Sahu
- Department of Infectious Disease Biology, Institute of Life SciencesBhubaneswarIndia
| | - Abinash Dutta
- Department of Infectious Disease Biology, Institute of Life SciencesBhubaneswarIndia
| | - Narottam Acharya
- Department of Infectious Disease Biology, Institute of Life SciencesBhubaneswarIndia
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Sahu SR, Dutta A, Peroumal D, Kumari P, Utakalaja BG, Patel SK, Acharya N. Immunogenicity and efficacy of CNA25 as a potential whole-cell vaccine against systemic candidiasis. EMBO Mol Med 2024:10.1038/s44321-024-00080-8. [PMID: 38783167 DOI: 10.1038/s44321-024-00080-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 05/10/2024] [Accepted: 05/10/2024] [Indexed: 05/25/2024] Open
Abstract
Disseminated fungal infections account for ~1.5 million deaths per year worldwide, and mortality may increase further due to a rise in the number of immunocompromised individuals and drug-resistance fungal species. Since an approved antifungal vaccine is yet to be available, this study explored the immunogenicity and vaccine efficacy of a DNA polymerase mutant strain of Candida albicans. CNA25 is a pol32ΔΔ strain that exhibits growth defects and does not cause systemic candidiasis in mice. Immunized mice with live CNA25 were fully protected against C. albicans and C. parapsilosis but partially against C. tropicalis and C. glabrata infections. CNA25 induced steady expression of TLR2 and Dectin-1 receptors leading to a faster recognition and clearance by the immune system associated with the activation of protective immune responses mostly mediated by neutrophils, macrophages, NK cells, B cells, and CD4+ and CD8+ T cells. Molecular blockade of Dectin-1, IL-17, IFNγ, and TNFα abolished resistance to reinfection. Altogether, this study suggested that CNA25 collectively activates innate, adaptive, and trained immunity to be a promising live whole-cell vaccine against systemic candidiasis.
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Affiliation(s)
- Satya Ranjan Sahu
- Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, Odisha, 751023, India
- Regional Center for Biotechnology, Faridabad, Haryana, 751021, India
| | - Abinash Dutta
- Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, Odisha, 751023, India
| | - Doureradjou Peroumal
- Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, Odisha, 751023, India
| | - Premlata Kumari
- Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, Odisha, 751023, India
- Regional Center for Biotechnology, Faridabad, Haryana, 751021, India
| | - Bhabasha Gyanadeep Utakalaja
- Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, Odisha, 751023, India
- Regional Center for Biotechnology, Faridabad, Haryana, 751021, India
| | - Shraddheya Kumar Patel
- Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, Odisha, 751023, India
- Regional Center for Biotechnology, Faridabad, Haryana, 751021, India
| | - Narottam Acharya
- Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, Odisha, 751023, India.
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Sahu SR, Bose S, Singh M, Kumari P, Dutta A, Utkalaja BG, Patel SK, Acharya N. Vaccines against candidiasis: Status, challenges and emerging opportunity. Front Cell Infect Microbiol 2022; 12:1002406. [PMID: 36061876 PMCID: PMC9433539 DOI: 10.3389/fcimb.2022.1002406] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 08/02/2022] [Indexed: 11/13/2022] Open
Abstract
Candidiasis is a mycosis caused by opportunistic Candida species. The occurrence of fungal infections has considerably increased in the last few years primarily due to an increase in the number of immune-suppressed individuals. Alarming bloodstream infections due to Candida sp. are associated with a higher rate of morbidity and mortality, and are emerged as major healthcare concerns worldwide. Currently, chemotherapy is the sole available option for combating fungal diseases. Moreover, the emergence of resistance to these limited available anti-fungal drugs has further accentuated the concern and highlighted the need for early detection of fungal infections, identification of novel antifungal drug targets, and development of effective therapeutics and prophylactics. Thus, there is an increasing interest in developing safe and potent immune-based therapeutics to tackle fungal diseases. In this context, vaccine design and its development have a priority. Nonetheless, despite significant advances in immune and vaccine biology over time, a viable commercialized vaccine remains awaited against fungal infections. In this minireview, we enumerate various concerted efforts made till date towards the development of anti-Candida vaccines, an option with pan-fugal vaccine, vaccines in the clinical trial, challenges, and future opportunities.
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Affiliation(s)
- Satya Ranjan Sahu
- Laboratory of Genomic Instability and Diseases, Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, India
- Regional center of Biotechnology, Faridabad, India
| | - Swagata Bose
- Laboratory of Genomic Instability and Diseases, Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, India
- School of Biotechnology, Kalinga Institute of Industrial Technology, Bhubaneswar, India
| | - Manish Singh
- Laboratory of Genomic Instability and Diseases, Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, India
| | - Premlata Kumari
- Laboratory of Genomic Instability and Diseases, Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, India
- Regional center of Biotechnology, Faridabad, India
| | - Abinash Dutta
- Laboratory of Genomic Instability and Diseases, Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, India
| | - Bhabasha Gyanadeep Utkalaja
- Laboratory of Genomic Instability and Diseases, Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, India
- Regional center of Biotechnology, Faridabad, India
| | - Shraddheya Kumar Patel
- Laboratory of Genomic Instability and Diseases, Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, India
- Regional center of Biotechnology, Faridabad, India
| | - Narottam Acharya
- Laboratory of Genomic Instability and Diseases, Department of Infectious Disease Biology, Institute of Life Sciences, Bhubaneswar, India
- *Correspondence: Narottam Acharya, ;
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Bernstein JA, Seidu L. Chronic vulvovaginal Candida hypersensitivity: An underrecognized and undertreated disorder by allergists. ALLERGY & RHINOLOGY 2015; 6:44-9. [PMID: 25860170 PMCID: PMC4388876 DOI: 10.2500/ar.2015.6.0113] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Vulvovaginal candidiasis infections are estimated to occur at least once during the lifetime of 75% of the female population. It has been proposed that some women with recurrent vulvovaginal candidiasis (RVVC) develop sensitization to Candida albicans and clinically improve in response to Candida immunotherapy. Here, we report a case series of 12 women diagnosed with chronic vulvovaginal Candida hypersensitivity subsequently treated with Candida immunotherapy and review potential systemic and localized host immune defense mechanisms involved in C. albicans overgrowth and sensitization. A retrospective review of vulvovaginal Candida hypersensitivity in women who were treated with C. albicans immunotherapy over the past eight years was conducted. Twelve women who qualified for a diagnosis of vulvovaginal Candida hypersensitivity were treated with Candida immunotherapy. Eleven of the 12 (92%) women reported clinical improvement after immunotherapy. The majority of these women were not sensitized to seasonal or perennial aeroallergens and clinically responded to lower concentrations of C. albicans allergen than what has been previously reported. In general, Candida immunotherapy was well tolerated. Chronic vulvovaginal Candida hypersensitivity is an underrecognized disorder by primary care physicians and therefore an undertreated disorder by allergists. A double-blinded, placebo-controlled randomized trial is necessary to firmly establish the efficacy of treatment with Candida immunotherapy. This investigation should be designed to include mechanistic studies that would help to better understand the etiology of this disorder.
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Affiliation(s)
- Jonathan A Bernstein
- Department of Internal Medicine, Division of Immunology/Allergy Section, University of Cincinnati College of Medicine, Atlanta, Georgia, USA
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Portuondo DLF, Ferreira LS, Urbaczek AC, Batista-Duharte A, Carlos IZ. Adjuvants and delivery systems for antifungal vaccines: Current state and future developments. Med Mycol 2014; 53:69-89. [DOI: 10.1093/mmy/myu045] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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Immunization protocols for use in animal models of candidiasis. Methods Mol Biol 2009. [PMID: 19152036 DOI: 10.1007/978-1-60327-151-6_4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Immunoprotection during most forms of candidiasis (oropharyngeal, invasive) is lacking since most candidiasis patients are immunosuppressed either as a result of their allogeneic transplant, cancer chemotherapy, or HIV infection. Consequently, immunization might be considered as an unlikely way to protect patients from such infection. Nonetheless, there are a number of investigations that indicate active immunization or the passive treatment with hyperimmune, specific antibodies can result in protection in models of experimental candidiasis. The former subject, active immunization, is the subject of this chapter. We focus on recent efforts with the Als family of cell wall proteins to serve as a model, and also offer immunization methods in candidiasis models that can be adapted to any antigen of the organism.
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Boneberger S, Korting H. Therapeutische oder prophylaktische Vakzination bei Pilzinfektionen. Hautarzt 2008; 59:828-32. [DOI: 10.1007/s00105-008-1582-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Donders GGG, Babula O, Bellen G, Linhares IM, Witkin SS. Mannose-binding lectin gene polymorphism and resistance to therapy in women with recurrent vulvovaginal candidiasis. BJOG 2008; 115:1225-31. [DOI: 10.1111/j.1471-0528.2008.01830.x] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Fidel PL. Immune Regulation and Its Role in the Pathogenesis of Candida Vaginitis. Curr Infect Dis Rep 2003; 5:488-493. [PMID: 14642190 DOI: 10.1007/s11908-003-0092-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The pathogenesis of vulvovaginal candidiasis, which is caused by Candida albicans, is poorly understood. Despite a strong protective role for cell-mediated immunity (CMI) against other mucosal candidal infections, numerous studies in humans and most animal models have revealed little to no role for CMI or other forms of acquired immunity against vaginal candidal infections. Studies suggest that this may be because of immunoregulatory mechanisms that inhibit more profound adaptive immune responses rather than the simple lack of responsiveness. Such regulatory mechanisms significantly influence the pathogenesis of Candida vaginitis.
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Affiliation(s)
- Paul L. Fidel
- Department of Microbiology, Immunology, and Parasitology, Louisiana State University Health Sciences Center, 1901 Perdido Street, New Orleans, LA 70112, USA.
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Wormley FL, Cutright J, Fidel PL. Multiple experimental designs to evaluate the role of T-cell-mediated immunity against experimental vaginalCandida albicansinfection. Med Mycol 2003; 41:401-9. [PMID: 14653516 DOI: 10.1080/3693780310001597683] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Studies to date suggest a limited protective role for Candida-specific Th1-type cell-mediated immunity (CMI) against Candida albicans vaginitis, despite protection against other mucosal Candida infections. Recent evidence suggests this may be due to immunoregulatory mechanisms that inhibit a more profound CMI response against C. albicans vaginal infections. The present study was designed to conduct an evaluation of the protective role of CMI against experimental C. albicans vaginitis using multiple approaches, including the use of T-cell-immunodeficient (SCID, Nude) and knockout (CD4) mice and several immunization designs in immunocompetent mice. Results showed, with few exceptions, that most T-cell-immunodeficient or knockout mice had a vaginal fungal burden similar to that of wild-type strains throughout the observation period. In addition, no correlation was observed between vaginal T-helper and proinflammatory cytokines and fungal burden, suggesting a generalized state of immunoregulation. Evaluation of the effects of various immunization designs that included different Candida antigens, routes of delivery and strains of mice yielded no protection against vaginal candidiasis. These studies provide further evidence of a lack of a protective role of T cells against C. albicans vaginitis, and continue to support the concept of immunoregulation against vaginal CMI responses.
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Affiliation(s)
- Floyd L Wormley
- Department of Microbiology, Immunology and Parasitology, Louisiana State University Health Sciences Center, New Orleans, LA 70112-1393, USA
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