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Ismail SHH, Hamdy R, Altaie AM, Fayed B, Dakalbab S, El-Awady R, Soliman SSM. Decoding host cell interaction- and fluconazole-induced metabolic alterations and drug resistance in Candida auris. Mycologia 2024:1-21. [PMID: 39024116 DOI: 10.1080/00275514.2024.2363730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2023] [Accepted: 05/31/2024] [Indexed: 07/20/2024]
Abstract
Candida auris is an emerging drug-resistant pathogen associated with high mortality rates. This study aimed to explore the metabolic alterations and associated pathogenesis and drug resistance in fluconazole-treated Candida auris-host cell interaction. Compared with controls, secreted metabolites from fluconazole-treated C. auris and fluconazole-treated C. auris-host cell co-culture demonstrated notable anti-Candida activity. Fluconazole caused significant reductions in C. auris cell numbers and aggregated phenotype. Metabolites produced by C. auris with potential fungal colonization, invasion, and host immune evasion effects were identified. Metabolites known to enhance biofilm formation produced during C. auris-host cell interaction were inhibited by fluconazole. Fluconazole enhanced the production of metabolites with biofilm inhibition activity, including behenyl alcohol and decanoic acid. Metabolites with potential Candida growth inhibition activity such as 2-palmitoyl glycerol, 1-tetradecanol, and 1-nonadecene were activated by fluconazole. Different patterns of proinflammatory cytokine expression presented due to fluconazole concentration and host cell type (fibroblasts versus macrophages). This highlights the immune response's complexity, emphasizing the necessity for additional research to comprehend cell-type-specific responses to antifungal therapies. Both host cell interaction and fluconazole treatment increased the expression of CDR1 and ERG11 genes, both associated with drug resistance. This study provides insights into pathogenesis in C. auris due to host cell interaction and fluconazole treatment. Understanding these interactions is crucial for enhancing fluconazole sensitivity and effectively combating C. auris.
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Affiliation(s)
- Samah H H Ismail
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
- College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
| | - Rania Hamdy
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
- Faculty of Pharmacy, Zagazig University, P.O. Box 44519, Zagazig, Egypt
| | - Alaa M Altaie
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
| | - Bahgat Fayed
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
- Department of Chemistry of Natural and Microbial Product, National Research Centre, P.O. Box 12622, Cairo, Egypt
| | - Salam Dakalbab
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
- College of Medicine, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
| | - Raafat El-Awady
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
- College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
| | - Sameh S M Soliman
- Research Institute for Medical and Health Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
- College of Pharmacy, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
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McCort ME, Tsai H. Epidemiology of Invasive Candidiasis in Patients with Hematologic Malignancy on Antifungal Prophylaxis. Mycopathologia 2023; 188:885-892. [PMID: 37314582 DOI: 10.1007/s11046-023-00754-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/25/2023] [Indexed: 06/15/2023]
Abstract
The landscape of invasive Candida infections in patients with hematologic malignancy has evolved due to the adoption of anti-fungal prophylaxis, advances in oncological therapies, and developments in antifungal therapies and diagnostics. Despite these scientific gains, the morbidity and mortality caused by these infections remain unchanged, highlighting the importance of an updated understanding of its epidemiology. Non-albicans Candida species are now the predominant cause of invasive candidiasis in patients with hematological malignancy. This epidemiological shift from Candida albicans to non-albicans Candida species is partially a consequence of selective pressure from extensive azole use. Further analysis of this trend suggests other contributing factors including immunocompromise caused by the underlying hematologic malignancy and the intensity of its associated treatments, oncological practices, and regional or institution specific variables. This review characterizes the changing distribution of Candida species in patients with hematologic malignancy, describes the causes driving this change, and discusses clinical considerations to optimize management in this high-risk patient population.
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Affiliation(s)
- Margaret E McCort
- Department of Medicine, Division of Infectious Diseases, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY, USA.
| | - Helen Tsai
- Department of Medicine, Division of Infectious Diseases, Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY, USA
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Bai X, Luo J. Invasive Candidiasis in Patients with Solid Tumors: A Single-Center Retrospective Study. Int J Gen Med 2023; 16:2419-2426. [PMID: 37333879 PMCID: PMC10276605 DOI: 10.2147/ijgm.s411006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 05/30/2023] [Indexed: 06/20/2023] Open
Abstract
Background Invasive candidiasis (ICs) is one of the common causes of death in patients with solid tumors. However, studies on the clinical characteristics of ICs with solid tumors are limited. Methods The purpose of this study was to retrospectively analyse the clinical characteristics, laboratory results and risk factor prediction of inpatients with ICs and solid tumors. We reviewed the clinical data and candida specimen information of hospitalized patients diagnosed with solid tumors combined with ICs at the First Hospital of China Medical University from January 2016 to December 2020. Multivariate logistic regression analysis was used to assess the prognostic factors associated with mortality in these patients. Results A total of 243 ICs patients with solid tumors were included in this study. The average ± SD age was 62.8 ± 11.7 (range: 27-93 years old), of which nearly 41% were ≥ 65 years old (99/243, 40.7%), and most were male (162/243, 66.6%). Most patients had malignant tumors of the digestive system. The most common candida was Candida parapsilosis (101/243, 41.5%), followed by Candida guilliermondii (83/243, 34.1%), Candida albicans (32/243, 13.1%), Candida glabrata (17/243, 6.9%), Candida tropicalis (7/243, 2.8%) and Candida krusei (3/243, 1.2%). Multivariate logistic regression analysis showed that the length of stay in the ICU, urinary catheter, total parenteral nutrition, stay in the ICU, renal failure and neutrophil count were prognostic factors related to death. Conclusion In this study, based on the clinical data of solid tumor patients with ICs in the past 5 years, the results showed that the length of stay in the ICU, urinary catheter, total parenteral nutrition, stay in the ICU, renal failure and neutrophil count were identified as the main prognostic factors. This study can be used to help clinicians carry out early intervention for high-risk patients.
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Affiliation(s)
- Xueying Bai
- Department of Thoracic Surgery, The First Hospital of China Medical University, Shenyang, 110001, People’s Republic of China
| | - Ji Luo
- Department of Thoracic Surgery, The First Hospital of China Medical University, Shenyang, 110001, People’s Republic of China
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Gautam S, Das S, Singh PK, Rai G, Jain C, Saha R, Singh NP, Gomber S, Eltayeb R, Dar SA. Predictors of Candidemia during Febrile Episode in Lymphoreticular Malignancy Affecting Paediatric Population. Diagnostics (Basel) 2023; 13:diagnostics13091638. [PMID: 37175029 PMCID: PMC10177753 DOI: 10.3390/diagnostics13091638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Revised: 05/03/2023] [Accepted: 05/04/2023] [Indexed: 05/15/2023] Open
Abstract
Limited studies on candidemia in malignancy in the paediatric population from developing countries show a high incidence, high morbidity and a unique epidemiology as compared to developed nations. Our prospective observational study aimed to explore the prevalence of invasive candidiasis, especially candidemia, in febrile paediatric patients with lymphoreticular malignancy. A sample size of 49 children, with 100 recorded febrile episodes was studied. The relevance of candida colonization and mannan antigen detection as indicators of impending candidemia was evaluated. Genotypic identification of the yeast isolates was followed by sequence analysis using the NCBI-BLAST program, and the generation of the phylogenetic tree using MEGA 6.0 software. We observed a 5% prevalence of candidemia among febrile paediatric patients with lymphoreticular malignancy, predominantly caused by non-albicans candida. Colonization at multiple anatomical sites decreased from day 1 to day 8 of febrile episodes. Significant candida colonization (colonization index ≥0.5) was seen in a larger proportion of candidemia patients on day 1 and day 4 (p < 0.001) displaying a definite association between the two. The receiver operator characteristic (ROC) curve analysis for mannan antigen level revealed a cut-off of ≥104.667 pg/mL, suitable for predicting candidemia with a sensitivity of 100%, specificity of 92% and area under ROC value of 0.958 (95% CI: 0.915-1; p < 0.001). A phylogenetic tree with three population groups, clade 1, 2 and 3, consisting of Candida auris (1), Candida tropicalis (2) and Candida parapsilosis (2), respectively, was generated. The diagnosis of candidemia based on mannan antigen detection gives early results and has high negative predictive values. It can be combined with other biomarkers to increase sensitivity, specificity and positive predictive value.
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Affiliation(s)
- Suchita Gautam
- Department of Microbiology, University College of Medical Sciences (University of Delhi) & GTB Hospital, Delhi 110095, India
| | - Shukla Das
- Department of Microbiology, University College of Medical Sciences (University of Delhi) & GTB Hospital, Delhi 110095, India
| | - Praveen Kumar Singh
- Department of Microbiology, University College of Medical Sciences (University of Delhi) & GTB Hospital, Delhi 110095, India
| | - Gargi Rai
- Department of Microbiology, University College of Medical Sciences (University of Delhi) & GTB Hospital, Delhi 110095, India
| | - Charu Jain
- Department of Microbiology, University College of Medical Sciences (University of Delhi) & GTB Hospital, Delhi 110095, India
| | - Rumpa Saha
- Department of Microbiology, University College of Medical Sciences (University of Delhi) & GTB Hospital, Delhi 110095, India
| | - Narendra Pal Singh
- Department of Microbiology, University College of Medical Sciences (University of Delhi) & GTB Hospital, Delhi 110095, India
| | - Sunil Gomber
- Department of Paediatrics, University College of Medical Sciences (University of Delhi) & GTB Hospital, Delhi 110095, India
| | - Raga Eltayeb
- Department of Pathology, College of Medicine, Jazan University, Jazan 45142, Saudi Arabia
| | - Sajad Ahmad Dar
- Department of Microbiology, University College of Medical Sciences (University of Delhi) & GTB Hospital, Delhi 110095, India
- Research and Scientific Studies Unit, College of Nursing, Jazan University, Jazan 45142, Saudi Arabia
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De Rosa FG, Busca A, Capparella MR, Yan JL, Aram JA. Invasive Candidiasis in Patients with Solid Tumors Treated with Anidulafungin: A Post Hoc Analysis of Efficacy and Safety of Six Pooled Studies. Clin Drug Investig 2021; 41:539-548. [PMID: 33891293 PMCID: PMC8195786 DOI: 10.1007/s40261-021-01024-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/06/2021] [Indexed: 11/25/2022]
Abstract
Background Solid tumors are a common predisposing factor for invasive candidiasis (IC) or candidemia due to IC. Objectives Post hoc analysis of patient-level efficacy and safety data from six studies of anidulafungin (with similar protocols/endpoints) in adults with IC/candidemia summarized by past or recent diagnosis of solid tumors. Patients/methods Patients received a single intravenous (IV) dose of anidulafungin 200 mg, followed by 100 mg once daily. After ≥ 5 to ≥ 10 days of IV treatment, switch to oral voriconazole/fluconazole was permitted in all but one study. Time of solid tumor diagnosis was defined as past, ≥ 6; and recent, < 6 months prior to study entry. Primary endpoint: global response of success (GRS) rate at the end of IV therapy (EOIVT). Secondary endpoints included the GRS rate at the end of all therapy (EOT), all-cause mortality, and safety. Results The GRS rate in the overall population was 73.4% at EOIVT and 65.5% at EOT. Past or recent solid tumor diagnosis did not affect GRS at EOIVT or EOT (past: 75.5% and 71.4%; recent: 72.2% and 62.2%, respectively). All-cause mortality was 14.4% on day 14 and 20.1% at day 28. Most treatment-emergent adverse events were mild/moderate in severity (81.6%). Conclusions Treatment of IC was effective regardless of the time of solid tumor diagnosis. Trial Registration Data were pooled from six studies: NCT00496197 (first posted on ClinicalTrials.gov on July 4, 2007); NCT00548262 (first posted on ClinicalTrials.gov on October 23, 2007); NCT00537329 (first posted on ClinicalTrials.gov on October 1, 2007); NCT00689338 (first posted on ClinicalTrials.gov on June 3, 2008); NCT00806351 (first posted on ClinicalTrials.gov on December 10, 2008); NCT00805740 (first posted on ClinicalTrials.gov on December 10, 2008). Patients with solid tumor cancers (cancer of internal organs) have increased risk of fungal infections that can spread in the body through the blood. Infection with Candida species, known as invasive candidiasis (IC) (Candida invades the body in places normally free from germs) or candidemia (Candida infection in the blood), can cause severe illness and/or death. Anidulafungin is an antifungal drug recommended to treat IC/candidemia. This post hoc analysis looked at how effective and safe anidulafungin was in adult patients with IC/candidemia with ‘recent’ or ‘past’ history of solid tumors. The analysis included patients diagnosed with cancer less than 6 months before (recent history) or more than 6 months before (past history) they first received anidulafungin. Patients received anidulafungin by injection (intravenously [IV]) into the veins and, for continued treatment, were able to take a different antifungal drug orally. Of 539 patients from six studies, 139 had confirmed IC/candidemia and a history of solid tumors. Approximately 7 out of 10 (72%) patients were cured or no longer had signs of Candida infection at the end of IV anidulafungin treatment. Results were similar in patients with past or recent diagnosis of solid tumors. Treatment side effects reported in approximately 8 out of 10 (82%) patients were mild-to-moderate in severity. This analysis suggests anidulafungin was well tolerated and effective at treating IC/candidemia in patients with solid tumors, whether diagnosed recently or in the past.
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Affiliation(s)
| | - Alessandro Busca
- Department of Oncology and Hematology, Stem Cell Transplant Centre, Turin, Italy
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Smatti MK, Al-Sarraj YA, Albagha O, Yassine HM. Host Genetic Variants Potentially Associated With SARS-CoV-2: A Multi-Population Analysis. Front Genet 2020; 11:578523. [PMID: 33133166 PMCID: PMC7567011 DOI: 10.3389/fgene.2020.578523] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 08/17/2020] [Indexed: 12/27/2022] Open
Abstract
Background Clinical outcomes of coronavirus disease 2019 (COVID-19), caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) showed enormous inter-individual and inter-population differences, possibly due to host genetics differences. Earlier studies identified single nucleotide polymorphisms (SNPs) associated with SARS-CoV-1 in Eastern Asian (EAS) populations. In this report, we aimed at exploring the frequency of a set of genetic polymorphisms that could affect SARS-CoV-2 susceptibility or severity, including those that were previously associated with SARS-CoV-1. Methods We extracted the list of SNPs that could potentially modulate SARS-CoV-2 from the genome wide association studies (GWAS) on SARS-CoV-1 and other viruses. We also collected the expression data of these SNPs from the expression quantitative trait loci (eQTLs) databases. Sequences from Qatar Genome Programme (QGP, n = 6,054) and 1000Genome project were used to calculate and compare allelic frequencies (AF). Results A total of 74 SNPs, located in 10 genes: ICAM3, IFN-γ, CCL2, CCL5, AHSG, MBL, Furin, TMPRSS2, IL4, and CD209 promoter, were identified. Analysis of Qatari genomes revealed significantly lower AF of risk variants linked to SARS-CoV-1 severity (CCL2, MBL, CCL5, AHSG, and IL4) compared to that of 1000Genome and/or the EAS population (up to 25-fold change). Conversely, SNPs in TMPRSS2, IFN-γ, ICAM3, and Furin were more common among Qataris (average 2-fold change). Inter-population analysis showed that the distribution of risk alleles among Europeans differs substantially from Africans and EASs. Remarkably, Africans seem to carry extremely lower frequencies of SARS-CoV-1 susceptibility alleles, reaching to 32-fold decrease compared to other populations. Conclusion Multiple genetic variants, which could potentially modulate SARS-CoV-2 infection, are significantly variable between populations, with the lowest frequency observed among Africans. Our results highlight the importance of exploring population genetics to understand and predict COVID-19 outcomes. Indeed, further studies are needed to validate these findings as well as to identify new genetic determinants linked to SARS-CoV-2.
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Affiliation(s)
- Maria K Smatti
- College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar.,Biomedical Research Center, Qatar University, Doha, Qatar
| | - Yasser A Al-Sarraj
- College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar
| | - Omar Albagha
- College of Health and Life Sciences, Hamad Bin Khalifa University, Doha, Qatar.,Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Hadi M Yassine
- Biomedical Research Center, Qatar University, Doha, Qatar
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Sun X, Gao Y, Ding Z, Zhao Y, Yang Y, Sun Q, Yang X, Ge W, Xu X, Cheng R, Zhang J. Soluble beta-glucan salecan improves vaginal infection of Candida albicans in mice. Int J Biol Macromol 2020; 148:1053-1060. [DOI: 10.1016/j.ijbiomac.2020.01.220] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 09/25/2019] [Accepted: 01/22/2020] [Indexed: 12/20/2022]
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Arega B, Woldeamanuel Y, Adane K, Sherif AA, Asrat D. Microbial spectrum and drug-resistance profile of isolates causing bloodstream infections in febrile cancer patients at a referral hospital in Addis Ababa, Ethiopia. Infect Drug Resist 2018; 11:1511-1519. [PMID: 30271184 PMCID: PMC6149984 DOI: 10.2147/idr.s168867] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Background The spectrum of pathogens causing bloodstream infections (BSIs) in cancer patients has shown significant fluctuations in different geographical areas and time. We studied the microbial spectrum and drug-resistance profile of pathogens causing BSIs in febrile cancer patients at a referral hospital in Ethiopia. Methods This cross-sectional study was conducted between December 2011 and June 2012 at Tikur Anbessa Hospital in Addis Ababa. Blood cultures from febrile cancer patients (n=107) were performed. Bacterial and fungal pathogens were identified and antimicrobial susceptibility testing done for the bacterial isolates using the Kirby-Bauer disk diffusion method. Results A total of 82 pathogens were isolated from 112 blood culture tests of the 76 patients: 71 (86.6%) of the isolates were bacteria and 11 (13.4%) were fungi. The majority (60.5% [43 of 71]) of the isolates were Gram-positive bacteria, where Staphylococcus aureus was predominant (72% [31 of 43]), and 68% of S. aureus isolates were resistant to ceftriaxone and oxacillin. Gram-negative bacteria accounted for 39.5% (28 of 71) of the isolates. Stenotrophomonas maltophilia (17.9% [five of 28]) was the most frequent Gram-negative isolate. In Gram-negative bacteria, the highest rates of resistance were observed in amoxicillin-clavulanic acid (80% [12 of 15]), followed by ceftriaxone (73.3%) and trimethoprim-sulfamethoxazole (73.3%). Multidrug resistance (resistance to three or more types of antibiotics, in this case to ceftriaxone, tetracycline, and trimethoprim-sulfamethoxazole) was observed in 26.3% (13 of 43) of Gram-positive and 40% (six of 16) of Gram-negative bacteria. Neutropenia was an independent risk factor for BSIs (P=0.02). Conclusion Gram-positive bacteria were the predominant etiologic agents of BSIs in Ethiopian patients with cancer. Both Gram-positive and Gram-negative bacteria showed an increasing level of resistance for most of the antibiotics used for empiric therapy. Routine bacterial surveillance and study of their resistance patterns must be an essential component of cancer-related infection control and care in our setting.
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Affiliation(s)
- Balew Arega
- College of Health Sciences, Debre Markos University, Debre Markos, .,Department of Microbiology, Immunology, and Parasitology, School of Medicine, College of Health Sciences, Addis Ababa University, Addis Ababa,
| | - Yimtubezinash Woldeamanuel
- Department of Microbiology, Immunology, and Parasitology, School of Medicine, College of Health Sciences, Addis Ababa University, Addis Ababa,
| | - Kelemework Adane
- Department of Microbiology and Immunology, College of Health Sciences, Mekelle University, Mekelle
| | - Abdulaziz A Sherif
- Department of Internal Medicine, School of Medicine, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
| | - Daniel Asrat
- Department of Microbiology, Immunology, and Parasitology, School of Medicine, College of Health Sciences, Addis Ababa University, Addis Ababa,
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Chandrasekar P, Sirohi B, Seibel NL, Hsu JW, Azie N, Wu C, Ruhnke M. Efficacy of micafungin for the treatment of invasive candidiasis and candidaemia in patients with neutropenia. Mycoses 2018; 61:331-336. [PMID: 29364548 DOI: 10.1111/myc.12748] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2017] [Revised: 01/11/2018] [Accepted: 01/13/2018] [Indexed: 01/05/2023]
Abstract
Neutropenia is linked to the development of invasive candidiasis/candidaemia, for which micafungin has demonstrated efficacy, but evidence in patients with neutropenia is limited. The aim of this study was to evaluate the efficacy of micafungin for the treatment of invasive candidiasis/candidaemia in patients with neutropenia (<500 neutrophils/μL) and without neutropenia. This pooled, post hoc analysis of 2 Phase 3 trials compared micafungin 100 mg/d (adults) and 2 mg/kg/d (paediatrics) with L-AmB 3 mg/kg/d (NCT00106288) and micafungin 100 mg/d and 150 mg/d with caspofungin 70 mg/d followed by 50 mg/d (adults) (NCT00105144); treatment duration 2-4 weeks (≤8 weeks for chronic disseminated candidiasis). Effects of neutropenia duration and Candida spp. on efficacy outcomes (treatment success, clinical and mycological response) were examined. Of 685 patients, 77 had neutropenia. The most common infection in patients with/without neutropenia was due to C. tropicalis (31/77) and C. albicans (295/608) respectively. Overall success was numerically lower in patients with vs without neutropenia (63.6% vs 72.9%). Clinical and mycological response was similar between groups. Neutropenia duration or Candida spp. did not impact micafungin's overall success rate. This analysis supports evidence that micafungin is effective against invasive candidiasis/candidaemia in patients with neutropenia, irrespective of neutropenia duration or Candida spp., although overall success may be lower than in patients without neutropenia.
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Affiliation(s)
- Pranatharthi Chandrasekar
- Division of Infectious Diseases, Department of Internal Medicine, Wayne State University, Karmanos Cancer Center, Detroit, MI, USA
| | | | - Nita L Seibel
- Cancer Therapy Evaluation Program, National Cancer Institute, Bethesda, MD, USA
| | - Jack W Hsu
- Division of Hematology and Oncology, Department of Medicine, University of Florida, Gainesville, FL, USA
| | - Nkechi Azie
- Astellas Pharma Global Development, Inc., Northbrook, IL, USA
| | - Chunzhang Wu
- Astellas Pharma Global Development, Inc., Northbrook, IL, USA
| | - Markus Ruhnke
- Charité University Medicine, Humboldt University, Berlin, Germany
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10
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Dewan E, Biswas D, Kakati B, Verma SK, Kotwal A, Oberoi A. Epidemiological and mycological characteristics of candidemia in patients with hematological malignancies attending a tertiary-care center in India. Hematol Oncol Stem Cell Ther 2015; 8:99-105. [PMID: 26173033 DOI: 10.1016/j.hemonc.2015.06.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 05/21/2015] [Accepted: 06/01/2015] [Indexed: 10/23/2022] Open
Abstract
BACKGROUND AND OBJECTIVES We undertook the present study to ascertain the contributing risk factors and explore the epidemiological and mycological characteristics of opportunistic candidemia among patients with hematological malignancies. DESIGN AND SETTINGS Observational cross-sectional study in a tertiary care center. PATIENTS AND METHODS Consecutive patients with hematological malignancies reporting to the collaborating medical and pediatric units with a febrile episode were recruited and screened for candidemia by blood culture. Recovered Candida isolates were speciated and antifungal susceptibility testing was performed as per Clinical and Laboratory Standards Institute guideline (CLSI) guidelines M44-A. Further analysis was done for potential risk factors and compared between culture positive and negative patients. RESULTS Of 150 patients recruited, the majority (n=27) were between 51 and 60 years and the male to female ratio was 1.63:1. Fifteen patients (10%) were culture positive. The culture positivity was significantly higher in acute lymphocytic leukemia (ALL) than in non-ALL patients (p=0.03). There was significant association of candidaemia with leucopenia, chemotherapeutic drugs, corticosteroids and presence of indwelling devices. Duration of disease (p=0.032) and duration of hospitalization (p=0.003) were significantly prolonged in culture positive patients. C. tropicalis was the commonest isolate (46.67%), with non- Candida albicans outnumbering C. albicans in all categories of hematological malignancies (2.75:1). All isolates of C. albicans were uniformly sensitive to all the azoles, but only 50% were sensitive to amphotericin B and none to nystatin and flucytosine. CONCLUSIONS This observational study identifies ALL and chronic lymphocytic leukemia (CLL) as the forms of hematological malignancy predominantly associated with candidemia; specifies risk factors and chemotherapeutic agents predisposing patients towards its occurrence; reports a preponderance of C. tropicalis among the causative agents and finds voriconazole to be the most effective antifungal agent against the recovered isolates. This information could assist in tailoring prophylactic and therapeutic antifungal practices for this infection, according to local epidemiological and mycological characteristics.
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Affiliation(s)
- Eshani Dewan
- Department of Microbiology, Himalayan Institute of Medical Sciences, Dehradun, Uttarakhand, India; Department of Microbiology, Christian Medical College and Hospital, Ludhiana, Punjab, India.
| | - Debasis Biswas
- Department of Microbiology, Himalayan Institute of Medical Sciences, Dehradun, Uttarakhand, India; Department of Microbiology, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, India
| | - Barnali Kakati
- Department of Microbiology, Himalayan Institute of Medical Sciences, Dehradun, Uttarakhand, India
| | - S K Verma
- Department of Medicine, Himalayan Institute of Medical Sciences, Dehradun, Uttarakhand, India
| | - Aarti Kotwal
- Department of Microbiology, Himalayan Institute of Medical Sciences, Dehradun, Uttarakhand, India
| | - Aroma Oberoi
- Department of Microbiology, Christian Medical College and Hospital, Ludhiana, Punjab, India
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11
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Two fundamentals of mammalian defense in fungal infections: endothermy and innate antifungal immunity. Pol J Vet Sci 2014; 17:555-67. [PMID: 25286672 DOI: 10.2478/pjvs-2014-0084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The environment of animals is inhabited by enormous fungal species, but only a few hundreds are pathogenic for mammals. Most of potentially pathogenic fungal species, excluding dermatophytes, seldom cause the disease in immunocompetent hosts. Data from literature indicate, that an immune system and endothermy are foundations for this mammalian relative resistance to fungal systemic infections. Stable and high temperature of the body restricts invasion and growth of potentially pathogenic fungi. Together with elevated metabolism it supports the effectiveness of mammalian immunity. The innate immunity is assigned to prevent the invasion of various microbes (including fungi) to the hosts' organism. It consists of cellular receptors and several humoral factors as the Antimicrobial Peptides. If the physical barriers fail in stopping the invader, it is recognized as "alien" by multiple Pattern Recognition Receptors (PRRs) like Toll Like Receptors (TLRs) expressed by cells of innate immunity and/or C-type lectins. At the same time innate inflammation begins and the complement cascade is activated. These mechanisms are able to stop and clear some fungal infections. During existing infection the adaptive immunity is induced. This review aims to show the role of mammalian endothermy and to point the most important elements of innate antifungal immunity.
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Riwes MM, Wingard JR. Diagnostic methods for invasive fungal diseases in patients with hematologic malignancies. Expert Rev Hematol 2013; 5:661-9. [PMID: 23216596 DOI: 10.1586/ehm.12.53] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Invasive fungal disease is associated with increased morbidity and mortality in hematologic malignancy patients and hematopoietic stem cell transplant recipients. Timely recognition and treatment of invasive fungal diseases in these patients are essential and decrease mortality. However, conventional definitive diagnostic methods are difficult and time consuming. While conventional microbiological and histopathological methods are still needed for a definitive diagnosis of invasive fungal disease, new noninvasive diagnostic methods including serologic and molecular biomarkers are now available. These new diagnostic methods facilitate an early diagnosis of invasive fungal disease and allow for utilization of a pre-emptive treatment approach, which may ultimately lead to improved treatment outcomes and reduced toxicity.
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Affiliation(s)
- Mary Mansour Riwes
- University of Florida, College of Medicine, Division of Hematology/Oncology 1600 W Archer Road, Gainesville, FL 32610-0278, USA
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Biswal S, Godnaik C. Incidence and management of infections in patients with acute leukemia following chemotherapy in general wards. Ecancermedicalscience 2013; 7:310. [PMID: 23634180 PMCID: PMC3634721 DOI: 10.3332/ecancer.2013.310] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Indexed: 12/02/2022] Open
Abstract
We hypothesise that treating patients with acute leukaemia in general wards, with proper hygienic and sanitary practices, would result in the minimum utilisation of resources as compared with the corresponding patients receiving ICU support. For this study, the acute leukaemia patients on induction chemotherapy were kept in general wards and observed for the incidence of neutropenia, resultant neutropenic febriles, the causative organism, and the effect of empirical antimicrobial treatment protocol on the outcome of such infections. Prophylactic anti-fungal therapy and cotrimoxazole therapy improved the outcome of infections. The therapy of neutropenic fever and infections must be adapted according to the risk factors and should include early empiric antifungal therapy. It was observed that the treatment of such patients in general wards could be managed effectively, with the added advantage of optimum utilisation of resources and in a patient-friendly environment, at a reasonable cost to the patients.
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Li YC, Liang HC, Chen HM, Tan LR, Yi YY, Qin Z, Zhang WM, Wu DW, Li CW, Lin RF, Su ZR, Lai XP. Anti-Candida albicans activity and pharmacokinetics of pogostone isolated from Pogostemonis Herba. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2012; 20:77-83. [PMID: 23159370 DOI: 10.1016/j.phymed.2012.08.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Revised: 07/08/2012] [Accepted: 08/23/2012] [Indexed: 06/01/2023]
Abstract
The present work was designed to evaluate the in vitro and in vivo anti-Candida activity of pogostone (PO), a natural product isolated from Pogostemon cablin (Blanco) Benth. PO showed potent in vitro activity against clinical Candida spp. isolates tested in this study. PO and the reference drug voriconazole (VRC) were equally effective against all the fluconazole-resistant Candida albicans strains, with MIC ranging from 3.1 μg/ml to 50 μg/ml. Besides, PO was fungicidal against all Candida isolates with MFC ranging from 50 μg/ml to 400 μg/ml. By contrast, VRC was fungistatic as it failed to elicit a fungicidal effect against the Candida spp. isolates at the highest tested concentration (400 μg/ml). Furthermore, oral and topical PO administration effectively reduced the fungal load in vagina of vulvovaginal candidiasis mouse models. Topical PO administration (1.0-4.0 mg/kg) demonstrated higher activity against the vulvovaginal candidiasis than VRC (4.0 mg/kg). The pharmacokinetics and safety profile of PO were also investigated. The pharmacokinetics assay revealed that PO was easily absorbed after oral administration in mice, which might account for its in vivo anti-Candida effect. The acute toxicity test showed that the median lethal dose of PO in mice was 355 mg/kg, which was much higher than the daily dose used for the therapeutic experiments. This study demonstrated the potential of PO as a promising candidate for the treatment of Candida infections, particularly for vulvovaginal candidiasis.
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Affiliation(s)
- Yu-Cui Li
- College of Chinese Medicines, Guangzhou University of Chinese Medicine, Guangzhou, PR China
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Bergamasco MD, Garnica M, Colombo AL, Nucci M. Epidemiology of candidemia in patients with hematologic malignancies and solid tumours in Brazil. Mycoses 2012; 56:256-63. [DOI: 10.1111/myc.12013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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MacCallum DM. Hosting infection: experimental models to assay Candida virulence. Int J Microbiol 2011; 2012:363764. [PMID: 22235206 PMCID: PMC3253448 DOI: 10.1155/2012/363764] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2011] [Accepted: 10/13/2011] [Indexed: 02/01/2023] Open
Abstract
Although normally commensals in humans, Candida albicans, Candida tropicalis, Candida parapsilosis, Candida glabrata, and Candida krusei are capable of causing opportunistic infections in individuals with altered physiological and/or immunological responses. These fungal species are linked with a variety of infections, including oral, vaginal, gastrointestinal, and systemic infections, with C. albicans the major cause of infection. To assess the ability of different Candida species and strains to cause infection and disease requires the use of experimental infection models. This paper discusses the mucosal and systemic models of infection available to assay Candida virulence and gives examples of some of the knowledge that has been gained to date from these models.
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Affiliation(s)
- Donna M. MacCallum
- Aberdeen Fungal Group, School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Foresterhill, Aberdeen, AB25 2ZD, UK
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Donker AE, Mavinkurve-Groothuis AMC, van Die LE, Verweij PE, Hoogerbrugge PM, Warris A. Favorable outcome of chronic disseminated candidiasis in four pediatric patients with hematological malignancies. Med Mycol 2011; 50:315-9. [PMID: 22103343 DOI: 10.3109/13693786.2011.588256] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Four children were diagnosed with chronic disseminated candidiasis (CDC) during treatment for hematological malignancies. All presented with persistent fever, not responsive to broad-spectrum antibiotics, abdominal distension and hepatosplenomegaly. Two children needed artificial ventilation because of respiratory insufficiency. The time between onset of neutropenic fever and diagnosis of CDC ranged from 20-49 days. Ultrasound and computed tomography failed to demonstrate CDC during the neutropenic phase. All children needed a liver or spleen biopsy to establish the diagnosis of CDC. Three of four patients continued chemotherapy during treatment for the fungal infection. All patients had a favorable outcome, both in terms of the invasive Candida infections, as well as their underlying malignancies.
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Affiliation(s)
- Albertine E Donker
- Department of Pediatric Hematology and Oncology, Harbor Hospital, Rotterdam, the Netherlands.
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Microbial etiology of febrile neutropenia. Indian J Hematol Blood Transfus 2010; 26:49-55. [PMID: 21629636 DOI: 10.1007/s12288-010-0029-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Accepted: 08/10/2010] [Indexed: 10/19/2022] Open
Abstract
Bacterial and fungal infections are a major cause of morbidity and mortality among neutropenic patients. The choice of empiric antimicrobial regimen is based on susceptibility pattern of locally prevalent pathogens. From 64 febrile neutropenic patients with clinical sepsis, blood and other appropriate clinical specimens were processed to determine bacterial and fungal spectrum and their antimicrobial susceptibility pattern. Risk factors for developing sepsis were determined by case-control study. 68 organisms were recovered. Fifteen (22.05%) were Gram-positive cocci with predominance of methicillin Sensitive S. aureus (10.29%), 47 (69.11%) were Gram-negative rods with predominance of Klebsiella pneumoniae (30.88%) and four were Non albicans Candida. 81% and 60% of Klebsiella and E. coli were ESBL producers. All species of Candida were sensitive to amphoterecin B and voriconazole. Duration and extent of neutropenia, chemotherapy, immunosuppressive therapy, altered mucosal barriers and presence of central venous lines were statistically significant risk factors for developing sepsis. Gram-negative bacteria were the predominant isolates. The choice of therapy in neutropenic patients should be formulated based on local spectrum of microbes and local and regional resistance patterns.
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Abstract
Recent shifts in the epidemiology of invasive fungal infections (IFIs) among transplant and oncology populations have led to new recommendations on treatment; however, they have also brought new controversies. New pharmacologic therapies are being studied and guidelines for management of several IFIs have been changed accordingly. More information is being discovered about unique genetic factors that put some transplant recipients at greater risk than others for fungal infection. The role of immunomodulation continues to be investigated, and the delicate balance of maintaining some immune integrity while assuring protection of the graft remains critical. For transplant and oncology patients, the diagnosis and management of IFIs remain challenging, and improving outcomes depends on continued progress in all of these arenas. This article highlights recent advances and important factors to consider when treating transplant and oncology patients with IFIs.
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Affiliation(s)
- Anna K. Person
- Division of Infectious Diseases, Department of Medicine, Duke University School of Medicine, Durham, North Carolina
| | - Dimitrios P. Kontoyiannis
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Barbara D. Alexander
- Division of Infectious Diseases, Department of Medicine, Duke University School of Medicine, Durham, North Carolina
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Zore GB, Thakre AD, Rathod V, Karuppayil SM. Evaluation of anti-Candida potential of geranium oil constituents against clinical isolates of Candida albicans differentially sensitive to fluconazole: inhibition of growth, dimorphism and sensitization. Mycoses 2010; 54:e99-109. [DOI: 10.1111/j.1439-0507.2009.01852.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Sabino R, Veríssimo C, Brandão J, Alves C, Parada H, Rosado L, Paixão E, Videira Z, Tendeiro T, Sampaio P, Pais C. Epidemiology of candidemia in oncology patients: a 6-year survey in a Portuguese central hospital. Med Mycol 2010. [DOI: 10.3109/13693780903161216] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Venturini J, de Camargo MR, Félix MC, Vilani-Moreno FR, de Arruda MSP. Influence of Tumour Condition on the Macrophage Activity inCandida albicansInfection. Scand J Immunol 2009; 70:10-7. [DOI: 10.1111/j.1365-3083.2009.02260.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Camargo MR, Venturini J, Vilani-Moreno FR, Arruda MSP. Modulation of macrophage cytokine profiles during solid tumor progression: susceptibility to Candida albicans infection. BMC Infect Dis 2009; 9:98. [PMID: 19534779 PMCID: PMC2705374 DOI: 10.1186/1471-2334-9-98] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Accepted: 06/17/2009] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In order to attain a better understanding of the interactions between opportunist fungi and their hosts, we investigated the cytokine profile associated with the inflammatory response to Candida albicans infection in mice with solid Ehrlich tumors of different degrees. METHODS Groups of eight animals were inoculated intraperitoneally with 5 x 106 C. albicans 7, 14 or 21 days after tumor implantation. After 24 or 72 hours, the animals were euthanized and intraperitoneal lavage fluid was collected. Peritoneal macrophages were cultivated and the levels of IFN-gamma, TNF-alpha, IL-12, IL-10 and IL-4 released into the supernatants were measured by ELISA. Kidney, liver and spleen samples were evaluated for fungal dissemination. Tumor-free animals and animals that had only been subjected to C. albicans infection were used as control groups. RESULTS Our results demonstrated that the mice produced more IFN-gamma and TNF-alpha and less IL-10, and also exhibited fungal clearance, at the beginning of tumor evolution. With the tumor progression, this picture changed: IL-10 production increased and IFN-gamma and TNF-alpha release decreased; furthermore, there was extensive fungal dissemination. CONCLUSION Our results indicate that solid tumors can affect the production of macrophage cytokines and, in consequence, affect host resistance to opportunistic infections.
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Affiliation(s)
- Marcela R Camargo
- Department of Biological Sciences, Experimental Immunopathology Laboratory, College of Sciences, São Paulo State University, UNESP, Bauru, SP 17047-001, Brazil.
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Current Approaches in Antifungal Prophylaxis in High Risk Hematologic Malignancy and Hematopoietic Stem Cell Transplant Patients. Mycopathologia 2009; 168:299-311. [DOI: 10.1007/s11046-009-9188-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2008] [Accepted: 02/06/2009] [Indexed: 11/26/2022]
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