scholarly journals Mass Spectrometry-based Proteomic and Immunoproteomic Analyses of the Candida albicans Hyphal Secretome Reveal Diagnostic Biomarker Candidates for Invasive Candidiasis

2021 ◽  
Author(s):  
Catarina Vaz ◽  
Aida Pitarch ◽  
Emilia Gómez-Molero ◽  
Ahinara Amador-García ◽  
Michael Weig ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Invasive Candidiasis ◽  
High Morbidity ◽  
Diagnostic Biomarker ◽  
Predisposing Factor ◽  
Host Interaction ◽  
Antibody Reactivity ◽  
Extracellular Region ◽  
Wall Cell ◽  
Intracellular Compartments

Invasive candidiasis (IC) is associated with high morbidity and mortality in hospitalized patients if not diagnosed early. Long-term use of central venous catheters is a predisposing factor for IC. Hyphal forms of Candida albicans (the major etiological agent of IC) are related to invasion of host tissues. The secreted proteins of hyphae are involved in virulence, host interaction, immune response, and immune evasion. To identify IC diagnostic biomarker candidates, we characterized the C. albicans hyphal secretome by gel-free proteomic analysis, and further assessed the antibody-reactivity patterns to this subproteome in serum pools from 12 patients with non-catheter-associated IC (ncIC), 11 patients with catheter-associated IC (cIC), and 11 non-IC patients. We identified 301 secreted hyphal proteins stratified to stem from the extracellular region, cell wall, cell surface, or intracellular compartments. ncIC and cIC patients had higher antibody levels to the hyphal secretome than non-IC patients. Seven secreted hyphal proteins were identified to be immunogenic (Bgl2, Eno1, Pgk1, Glx3, Sap5, Pra1 and Tdh3). Antibody-reactivity patterns to Bgl2, Eno1, Pgk1 and Glx3 discriminated IC patients from non-IC patients, while those to Sap5, Pra1 and Tdh3 differentiated between cIC and non-IC patients. These proteins may be useful for development of future IC diagnostic tests.

scholarly journals Mass Spectrometry-Based Proteomic and Immunoproteomic Analyses of the Candida albicans Hyphal Secretome Reveal Diagnostic Biomarker Candidates for Invasive Candidiasis

2021 ◽  
Vol 7 (7) ◽  
pp. 501
Author(s):  
Catarina Vaz ◽  
Aida Pitarch ◽  
Emilia Gómez-Molero ◽  
Ahinara Amador-García ◽  
Michael Weig ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Invasive Candidiasis ◽  
High Morbidity ◽  
Diagnostic Biomarker ◽  
Predisposing Factor ◽  
Host Interaction ◽  
Antibody Reactivity ◽  
Extracellular Region ◽  
Wall Cell ◽  
Intracellular Compartments

Invasive candidiasis (IC) is associated with high morbidity and mortality in hospitalized patients if not diagnosed early. Long-term use of central venous catheters is a predisposing factor for IC. Hyphal forms of Candida albicans (the major etiological agent of IC) are related to invasion of host tissues. The secreted proteins of hyphae are involved in virulence, host interaction, immune response, and immune evasion. To identify IC diagnostic biomarker candidates, we characterized the C. albicans hyphal secretome by gel-free proteomic analysis, and further assessed the antibody-reactivity patterns to this subproteome in serum pools from 12 patients with non-catheter-associated IC (ncIC), 11 patients with catheter-associated IC (cIC), and 11 non-IC patients. We identified 301 secreted hyphal proteins stratified to stem from the extracellular region, cell wall, cell surface, or intracellular compartments. ncIC and cIC patients had higher antibody levels to the hyphal secretome than non-IC patients. Seven secreted hyphal proteins were identified to be immunogenic (Bgl2, Eno1, Pgk1, Glx3, Sap5, Pra1 and Tdh3). Antibody-reactivity patterns to Bgl2, Eno1, Pgk1 and Glx3 discriminated IC patients from non-IC patients, while those to Sap5, Pra1 and Tdh3 differentiated between cIC and non-IC patients. These proteins may be useful for development of future IC diagnostic tests.

scholarly journals Invasive Candidiasis Associated with Adenovirus Pneumonia

2021 ◽  
Vol 2021 ◽  
pp. 1-3
Author(s):  
Guwani Liyanage ◽  
Madhusha Gonapaladeniya ◽  
Thushari Dissanayake
Keyword(s):  
Candida Albicans ◽  
Preschool Child ◽  
Invasive Candidiasis ◽  
Candida Parapsilosis ◽  
Respiratory Infections ◽  
Severe Pneumonia ◽  
High Morbidity ◽  
Invasive Candida Infection ◽  
Adenovirus Pneumonia ◽  
Candida Infections

Invasive Candida infections in immunocompetent children lead to high morbidity and mortality despite available treatment. Candida albicans and Candida parapsilosis are the most common pathogens; however, there are newly emerging pathogenic non-albicans species. Adenovirus accounts for at least 5–10% of respiratory infections in children, and specific serotypes are associated with severe pneumonia. To the best of our knowledge, invasive Candida infection complicating adenovirus-associated pneumonia in immunocompetent children has not been reported previously. Herein, we describe a preschool child with invasive candidiasis associated with adenovirus pneumonia.

Enhanced IgE response to Candida albicans in postoperative invasive candidiasis

1996 ◽  
Vol 26 (4) ◽  
pp. 452-460 ◽  
Author(s):  
J. SAVOLAINEN ◽  
A. RANTALA ◽  
M. NERMES ◽  
L. LEHTONEN ◽  
M. VIANDER
Keyword(s):  
Candida Albicans ◽  
Invasive Candidiasis ◽  
Ige Response

scholarly journals The Novel Arylamidine T-2307 MaintainsIn VitroandIn VivoActivity against Echinocandin-Resistant Candida albicans

2014 ◽  
Vol 59 (2) ◽  
pp. 1341-1343 ◽  
Author(s):  
Nathan P. Wiederhold ◽  
Laura K. Najvar ◽  
Annette W. Fothergill ◽  
Rosie Bocanegra ◽  
Marcos Olivo ◽  
...  
Keyword(s):  
Body Weight ◽  
Candida Albicans ◽  
Invasive Candidiasis ◽  
Placebo Control ◽  
The Novel ◽  
Content Type ◽  
Fungal Burden ◽  
Potential Use

ABSTRACTWe evaluated thein vitroandin vivoactivities of the investigational arylamidine T-2307 against echinocandin-resistantCandida albicans. T-2307 demonstrated potentin vitroactivity, and daily subcutaneous doses between 0.75 and 6 mg/kg of body weight significantly improved survival and reduced fungal burden compared to placebo control and caspofungin (10 mg/kg/day) in mice with invasive candidiasis caused by an echinocandin-resistant strain. Thus, T-2307 may have potential use in the treatment of echinocandin-resistantC. albicansinfections.

scholarly journals Species identification of Candida isolated from clinical specimens in a tertiary care hospital

2016 ◽  
Vol 9 (1) ◽  
pp. 20 ◽  
Author(s):  
Lsmet Nigar ◽  
Shirin Tarafder ◽  
Rehana Razzak Khan ◽  
S. M. Ali Ahmed ◽  
Ahmed Abu Saleh
Keyword(s):  
Candida Albicans ◽  
Candida Species ◽  
Tertiary Care ◽  
Clinical Manifestations ◽  
Common Species ◽  
Blood Stream ◽  
Care Hospital ◽  
Emerging Pathogens ◽  
Predisposing Factor ◽  
Clinical Specimens

<p><strong>Background:</strong> Candida species are responsible for various clinical manifestations from mucocutaneous overgrowth to blood stream infections especially in immunocompromized situations. Although C. albicans is the most prevalent species, high incidence of non-albicans Candida species with antifungal resistance are emerging which is posing a serious threat to the patients care.</p><p><strong>Objective:</strong> This study aimed to isolate and identify different species of Candida from different clinical specimens. Methods: A total of 100 different clinical specimens were studied of which 35 were oral swab, 28 were high vaginal swab, 15 were urine, 14 were nail, 04 were bronchoalveolar lavage and peritoneal fluid were 04. Among 100 clinical specimens, Candida isolates were identified in 64 specimens. Isolation of Candida species was done by primary culture in SDA. Subsequent identification of species were performed by germ tube test, subculture in chromo­genic agar medium and carbohydrate assimilation test with commonly used twelve sugars.</p><p><strong>Results:</strong> Out of 64 isolated Candida species, Candida albicans were 51.56% and the non-albicans Candida species were 48.44%. The most prevalent Candida species was C. albicans 33 (51.53%) followed by C. tropicalis 17 (26.56%). C. glabrata 4 (6.25%), C. parapsilo­sis 4 (6.25%), C. krusei 3 (4.68%) and C. guilliermondii 2 (3.2%). One of the isolated Candida species was unidentified.</p><p><strong>Conclusion:</strong> Though Candida albicans was found as the most common species, but non-albicans Candida species are appearing as emerging pathogens as well. Exposure to chemotherapy appeared to be the commonest predisposing factor for Candida infection followed by indwelling urinary catheter in situ for prolong period.</p>

scholarly journals ANTI-CANDIDA ALBICANS ACTIVITY OF THE ASSOCIATION OF CITRONELAL WITH ANFOTERICIN B OR WITH CETOCONAZOLE

2019 ◽  
Vol 16 (31) ◽  
pp. 250-257
Author(s):  
Patrícia Duarte Costa SILVA ◽  
Brenda Lavínia Calixto dos SANTOS ◽  
Gustavo Lima SOARES ◽  
Wylly Araújo de OLIVEIRA
Keyword(s):  
Candida Albicans ◽  
Antifungal Activity ◽  
Amphotericin B ◽  
Inhibitory Concentration ◽  
Fungal Infections ◽  
Pathogenic Fungi ◽  
Mortality Rates ◽  
New Drugs ◽  
High Morbidity ◽  
Isolated Species

Fungal infections caused by species of the genus Candida are responsible for high morbidity and mortality rates, mainly affecting immunocompromised individuals. Among fungi, Candida albicans is the most frequently isolated species of clinical specimens. A problem associated with increased resistance of pathogenic fungi to the agents used in the therapeutic regimen and the limited number of drugs to cure these infections. As a result, the search for new drugs with antifungal activity has become increasingly important. The aim of this study is to study the antifungal activity of citronellal alone and in combination with amphotericin B or ketoconazole. The Minimal Inhibitory Concentration of citronellal, amphotericin B and ketoconazole against strains of Candida albicans were evaluated by the microdilution technique, and the Minimum Fungicide Concentration of citronellal against the same strains was also performed. Through the checkerboard methodology the effect of the combination of citronelal with amphotericin B or with ketoconazole was determined. This study showed that the association of citronellal with ketoconazole was shown to be an additive against one of the strains of C. albicans and indifferent to another strain. While the combined activity of citronellal and amphotericin B demonstrated an indifferent effect on the strains tested.

Off-label use of T2Candida® test in vitreous humor for diagnosing invasive candidiasis: a clinical report

2021 ◽  
Author(s):  
Emilio Cendejas-Bueno ◽  
Helena Peinado ◽  
Fernando Baquero-Artigao ◽  
Iker Falces-Romero ◽  
Cristina Calvo-Rey ◽  
...  
Keyword(s):  
Candida Albicans ◽  
Invasive Candidiasis ◽  
Vitreous Humor ◽  
Body Fluids ◽  
Clinical Report ◽  
Microbiological Diagnosis ◽  
Off Label Use ◽  
Off Label ◽  
Sterile Body Fluids ◽  
Label Use

Here, we present a case of off-label successful use of the T2 MR (T2Candida® test) for the diagnosis of invasive candidiasis ( Candida albicans endolphthalmitis). This case demonstrates that T2Candida could be performed in sterile body fluids to improve microbiological diagnosis of invasive candidiasis.

scholarly journals The Paralogous Transcription Factors Stp1 and Stp2 of Candida albicans Have Distinct Functions in Nutrient Acquisition and Host Interaction

2020 ◽  
Vol 88 (5) ◽  
Author(s):  
Pedro Miramón ◽  
Andrew W. Pountain ◽  
Ambro van Hoof ◽  
Michael C. Lorenz
Keyword(s):  
Candida Albicans ◽  
Transcription Factors ◽  
Amino Acid ◽  
Cell Damage ◽  
Nutrient Acquisition ◽  
Acid Uptake ◽  
Content Type ◽  
Host Interaction ◽  
Amino Acid Utilization

ABSTRACT Nutrient acquisition is a central challenge for all organisms. For the fungal pathogen Candida albicans, utilization of amino acids has been shown to be critical for survival, immune evasion, and escape, while the importance of catabolism of host-derived proteins and peptides in vivo is less well understood. Stp1 and Stp2 are paralogous transcription factors (TFs) regulated by the Ssy1-Ptr3-Ssy5 (SPS) amino acid sensing system and have been proposed to have distinct, if uncertain, roles in protein and amino acid utilization. We show here that Stp1 is required for proper utilization of peptides but has no effect on amino acid catabolism. In contrast, Stp2 is critical for utilization of both carbon sources. Commensurate with this observation, we found that Stp1 controls a very limited set of genes, while Stp2 has a much more extensive regulon that is partly dependent on the Ssy1 amino acid sensor (amino acid uptake and catabolism) and partly Ssy1 independent (genes associated with filamentous growth, including the regulators UME6 and SFL2). The ssy1Δ/Δ and stp2Δ/Δ mutants showed reduced fitness in a gastrointestinal (GI) colonization model, yet induced greater damage to epithelial cells and macrophages in a manner that was highly dependent on the growth status of the fungal cells. Surprisingly, the stp1Δ/Δ mutant was better able to colonize the gut but the mutation had no effect on host cell damage. Thus, proper protein and amino acid utilization are both required for normal host interaction and are controlled by an interrelated network that includes Stp1 and Stp2.

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