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Antimicrobial effects of plant defence peptides expressed by bovine endothelial cells on intracellular pathogens Electron. J. Biotechnol.
Loeza-Ángeles,Heber; López-Meza,Joel E; Ochoa-Zarzosa,Alejandra.
Background: The actions of plant antimicrobial peptides (PAP) against intracellular pathogens are poorly known. It has been reported that wheat puroindolines show antibacterial activity against Staphylococcus epidermidis endocyted by macrophages. In this work, we evaluated the intracellular antimicrobial activity of PAP gamma-thionin and thionin Thi2.1 produced by bovine endothelial cells against intracellular Staphylococcus aureus and Candida albicans. We used three host-pathogen models: 1) bovine mammary epithelial cells (BMEC)-S. aureus, 2) bovine endothelial cells (BEC)-S. aureus and 3) BEC-C. albicans, and evaluated the effect of conditioned media from BEC producers of PAP (gamma-thionin and thionin Thi2.1). Results: In the first model, conditioned...
Tipo: Journal article Palavras-chave: Antimicrobial peptides; Arabidopsis thaliana thionin; Capsicum chinense gamma-thionin; Candida albicans; Intracellular pathogens; Staphylococcus aureus.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000500001
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Candidemia in a brazilian tertiary hospital: microbiological and clinical features over a six-year period J. Venom. Anim. Toxins incl. Trop. Dis.
Mondelli,AL; Niéro-Melo,L; Bagagli,E; Camargo,CH; Bruder-Nascimento,A; Sugizaki,MF; Carneiro,MV; Villas Boas,PJF.
Yeasts are becoming a common cause of nosocomial fungal infections in immunocompromised patients. Such infections often develop into sepsis with high mortality rates. The aim of this study was to evaluate some of the numerous factors associated with the development of candidemia. Medical records were retrospectively analyzed of 98 Candida spp. patients. Results showed that the most prevalent risk factors for developing candidemia were: antibiotics and antifungal agents (93.9% and 79.6%, respectively); the use of central venous catheter (93.9%); mechanical ventilation (73.5%); and parenteral nutrition (60.2%). The main species of Candida found were: C. parapsilosis (37.76%), C. albicans (33.67%); and others (28.57%). C. glabrata showed the highest mortality...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Candidemia; Mortality; Associated factors; Candida albicans.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992012000200015
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Actividad antimicrobiana y análisis de la composición química de una fracción de las flores de Acmella ciliata (Kunth) Cass Plantas Medicinales
Rincón Mejía,Carlos Andrés; Castaño Osorio,Jhon Carlos; Gómez Barrera,Milton; Rezek,Jan; Vaněk,Tomáš.
Tipo: Journal article Palavras-chave: Acmella ciliata; Alcamidas; Espilantol; Actividad antimicrobiana; Candida albicans.
Ano: 2015 URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962015000400005
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Effect of environmental and phenological factors on the antimicrobial activity of Cochlospermum regium (Schrank) Pilg. roots Agronomy
Inácio, Marielle Cascaes; Paz, Tiago Antunes; Bertoni, Bianca Waléria; Pereira, Ana Maria Soares.
Cochlospermum regium (Bixaceae) is a medicinal plant species native to the Brazilian savannah, known as the Cerrado. Local communities use its roots to treat infections of the female reproductive system. This study evaluated how seasonality, phenological stage, geographical location, plant age, and plant cultivation substrate affect the antimicrobial activity of Cochlospermum regium roots against Candida albicans. Although the plant displayed antimicrobial action in all the assayed conditions, the roots collected during fall and winter inhibited C. albicans the most effectively. The geographical location in which the plant material was found did not influence its biological response. Plant age and cultivation substrate did impact the biological response;...
Tipo: Info:eu-repo/semantics/article Palavras-chave: 5.01.03.00-8 Bixaceae; STAMP (Screening Test for Antibiotics in Medicinal Plants); Candida albicans; Cerrado; Algodãozinho-do-campo. Fitotecnia.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30567
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Histatin 5 and human lactoferrin inhibit biofilm formation of a fluconazole resistant Candida albicans clinical isolate Anais da ABC (AABC)
CURVELO,JOSÉ A.R.; MORAES,DANIEL C. DE; ANJOS,CAMILA A. DOS; PORTELA,MARISTELA B.; SOARES,ROSANGELA M.A..
Abstract:Candida albicans is the most important fungal pathogen that causes infections in humans. Biofilms are hard-to-treat structures due to their high antifungal resistance. Saliva is a fluid that contains antimicrobial substances acting as the first-line of defense against pathogens, and its immune components may be potential tools for the discovery of new treatments against candidiasis. To evaluate the activity of histatin 5 and human lactoferrin against biofilm formation. A fluconazole-resistant Candida albicans clinical isolate was used as the model microorganism. Morphogenesis was evaluated by differential counting. Biofilm quantification was performed by XTT reduction assay. Thickness and topography of biofilms were assessed through confocal laser...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Biofilm; Candida albicans; Fluconazole resistance; Histatin 5; Lactoferrin.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100622
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Antimicrobial, antioxidant and cytotoxicity potential of Manihot multifida (L.) Crantz (Euphorbiaceae) Anais da ABC (AABC)
FABRI,RODRIGO L.; SÁ,DANIEL S. DE; PEREIRA,ANA PATRÍCIA O.; SCIO,ELITA; PIMENTA,DANIEL S.; CHEDIER,LUCIANA M..
Manihot multifida (L.) Crantz (Euphorbiaceae) is widely used in popular medicine for the treatment of infected wounds. This study evaluated thein vitro antioxidant and antimicrobial potential of this species against strains of Gram-positive and Gram-negative bacteria and fungi, known to cause infections in humans. The extracts showed minimal inhibitory concentration (MIC) varying from 39 to 2500 µg/mL for antimicrobial activity. The methanolic extract of fruits, aqueous and hexane extracts of leaves showed a very strong activity against Candida albicans(ATCC 18804) with MIC of 39 µg/mL. Furthermore, the methanolic extract of M. multifida leaves exhibited DPPH (1,1-diphenyl-2-picrylhydrazyl) scavenging potential with inhibitory concentration (IC50) values...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antimicrobial; Antioxidant; Candida albicans; Cytotoxicity; Manihot multifida.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000100303
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Ocorrência de Candida albicans em intestinos de bovinos Arq. Bras. Med. Vet. Zootec.
Souza,W.A.; Siqueira,A.M..
Foram realizadas a identificação e a sorotipagem de C. albicans isoladas de fezes de bovinos em amamentação natural. Para o isolamento, utilizou-se o meio seletivo e diferencial de Pagano Levin, adicionado de bifenilo na concentração final de 0,1%. De 210 bovinos inicialmente considerados, 70 adultos, 68 bezerros após o desmame e 72 bezerros em fase de amamentação natural, observou-se positividade para C. albicans somente em nove amostras de fezes de bezerros em fase de amamentação (12,5%). A determinação do sorotipo por meio de provas de aglutinação direta em lâmina, com soros monoespecíficos, revelou que a totalidade das amostras isoladas pertencia ao sorotipo A. O bifenilo na concentração de 0,1% mostrou-se inibitório para a maioria dos bolores sem,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Bovino; Candida albicans; Candidíase; Sorotipos.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352003000300003
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Histological Observation and Expression Patterns of antimicrobial peptides during Fungal Infection in Musca domestica (Diptera: Muscidae) Larvae BABT
Jiangfan,Xiu; Tao,Wang; Yu,Wang; Jianwei,Wu; Guo,Guo; Yingchun,Zhang; Xiaoli,Shang.
ABSTRACT Housefly, Musca domestica, has a complicated immune system. However, its underlying operating mechanism remains elusive. Candida albicans is a major pathogen affecting humans by causing deep infection fungous disease, but it is non-symbiotic in houseflies. To investigate the C. albicans infection process in housefly, the changes in morphological and histological and expression patterns of antimicrobial peptide were monitored to indicate the insect's response to fungal infection. The results showed that scattered brown spots were comprising melanized encapsulation and encapsulated fungal cells were initially observed at the inner side of larvae's body wall 3 h post-infection (PI). Between 6 and 36 h PI, the whole body of larvae was densely covered...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Musca domestica; Larvae; Candida albicans; Infection; Innate immunity.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100340
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Anticandidal effect of endophytic bacteria isolated from Equisetum arvense L. against Candida albicans and Candida glabrata BABT
Das,Gitishree; Patra,Jayanta Kumar; Choi,Jaehyuk; Baek,Kwang-Hyun.
ABSTRACT Equisetum arvense, a fern species possesses a number of pharmaceutical prospective. In the present study, a total of 103 endophytic bacteria isolated from E. arvense and were evaluated for their anticandidal property against five Candida species, two C. albicans, C. glabrata, C. saitoana and C. geochares. Out of them fifty one were identified as per the morphological and molecular characterisation using 16S rRNA gene sequencing and among them, ten promising endophytic bacteria were mentioned in the present study. Among ten endophytic bacteria, Psychrobacillus insolitus and Curtobacterium oceanosedimentum exerted highest anticandidal effect against C. albicans KACC 30062 and C. glabrata KBNO6P00368, with diameter of inhibition zones of 21.30±0.41...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anticandidal effect; Endophytic bacteria; Equisetum arvense; Candida albicans; Candida glabrata.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100455
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Effect of pathogenic yeasts on human platelet aggregation BJID
Neiva,Teresinha de Jesus Carvalho; Santos,Jairo Ivo dos.
We investigated the effects of Candida albicans, Cryptococcus neoformans and the respective culture supernatants on human platelet aggregation (PA). Both yeasts were unable to aggregate the platelets directly. On the other hand, cells of these yeasts significantly (P < 0.01) inhibited PA at concentrations equal to or higher than 1 x 10(6) cells/mL for C. albicans and equal to or higher than 1 x 10(5) cells/mL for C. neoformans. When the supernatants of one-week broth cultures were added to the activated platelets no inhibition in aggregation was observed. Apparently somatic components of these yeasts, but not their metabolic products, exert an antagonistic effect on the aggregation of human platelets, possibly aiding the fungi in their evasion of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Candida albicans; Cryptococcus neoformans; Platelet aggregation.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702003000600003
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Secretory immunoglobulin A: a protective factor in the genital mucosa BJID
Giraldo,Paulo C.; Gonçalves,Ana Katherine; Eleutério Junior,José.
The genital mechanisms of defense are not well understood and are therefore ignored during therapy. This fact results in a great number of cases of treatment failure. The mucosa is an important protective factor of the genital female system, through self-defense mechanisms, and secretor antibodies (immunoglobulin A). The lymphoid tissue exerts protective anti-inflammatory activity, besides inhibiting microorganism adherence, neutralizes viruses and toxins and stabilizes the mucosal flora. Although certain microorganisms, such as viruses and fungus, are controlled by cellular immunity, secretory IgA can also exert an important role in the control of these agents.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Vaginal immunity; Genital infections; HPV; Candida albicans; Secretory IgA.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702006000400002
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An unusual cause of bilateral scrotal abscess in a preterm infant: Candida albicans BJID
Cetinkaya,Merih; Buyukkale,Gokhan; Payasli,Muge; Ozbek,Sibel; Kavuncuoglu,Sultan.
Acute scrotal abscess is a rare condition in neonates. Most of these abscesses were reported to be unilateral and caused by Staphylococcus and Salmonella spp. Herein, we report a bilateral scrotal abscess in a preterm infant and Candida albicans was isolated from the scrotal fluid culture. To our knowledge, this is the first bilateral scrotal abscess in a preterm infant caused by C. albicans. Therefore, this organism must be suspected in differential diagnosis of acute scrotal abscess in neonates, especially in preterm infants.
Tipo: Info:eu-repo/semantics/report Palavras-chave: Scrotal abscess; Neonate; Preterm infant; Candida albicans.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702013000200023
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Chloroquine sensitizes biofilms of Candida albicans to antifungal azoles BJID
Shinde,Ravikumar Bapurao; Raut,Jayant Shankar; Chauhan,Nitin Mahendra; Karuppayil,Sankunny Mohan.
Biofilms formed by Candida albicans, a human pathogen, are known to be resistant to different antifungal agents. Novel strategies to combat the biofilm associated Candida infections like multiple drug therapy are being explored. In this study, potential of chloroquine to be a partner drug in combination with four antifungal agents, namely fluconazole, voriconazole, amphotericin B, and caspofungin, was explored against biofilms of C. albicans. Activity of various concentrations of chloroquine in combination with a particular antifungal drug was analyzed in a checkerboard format. Growth of biofilm in presence of drugs was analyzed by XTT-assay, in terms of relative metabolic activity compared to that of drug free control. Results obtained by XTT-metabolic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antifungal; Biofilm; Candida albicans; Combination; Chloroquine; Drug resistance.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702013000400002
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Arachidonic acid affects biofilm formation and PGE2 level in Candida albicans and non-albicans species in presence of subinhibitory concentration of fluconazole and terbinafine BJID
Mishra,Nripendra Nath; Ali,Shakir; Shukla,Praveen K..
Candida albicans utilizes arachidonic acid (AA) released during the course of infection (Candidiasis) from phospholipids of infected host cell membranes and synthesizes extracellular prostaglandin(s) which play an important role in hyphae formation and host cell damage. C. albicans biofilms secrete significantly more prostaglandin(s) and evidence suggests that Candida biofilms have dramatically reduced susceptibility to majority of antifungal drugs. AA influences the saturation level of lipids and fluidity of yeast cell membranes. Therefore the aim of this study was to evaluate the effect of AA alone or in combination with antifungal agents on biofilm formation and production of prostaglandin (PGE2) in C. albicans, C. parapsilosis, C. glabrata, C....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Arachidonic acid; Candida albicans; AmBR; Candida tropicalis; Prostaglandin E2; FDA.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702014000300287
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Trailing end-point phenotype antibiotic-sensitive strains of Candida albicans produce different amounts of aspartyl peptidases BJMBR
Braga-Silva,L.A.; Mesquita,D.G.A.; Ribeiro,M.D.; Carvalho,S.M.F.; Fracalanzza,S.E.L.; Santos,A.L.S..
Candida albicans is an opportunistic fungal pathogen that causes severe systemic infections in immunosuppressed individuals. C. albicans resistance to antifungal drugs is a severe problem in patients receiving prolonged therapy. Moreover, trailing yeast growth, which is defined as a resistant MIC after 48 h of incubation with triazole antifungal agents but a susceptible MIC after 24 h, has been noted in tests of antifungal susceptibility against some C. albicans isolates. In this context, we recently noticed this phenomenon in our routine susceptibility tests with fluconazole/itraconazole and C. albicans clinical isolates. In the present study, we investigated the production of cell-associated and secreted aspartyl peptidases (Saps) in six trailing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Candida albicans; Trailing growth; Secreted aspartyl peptidases; Sap2.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000800013
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Model of experimental infection in healthy and immunosuppressed swiss albino mice (Mus musculus) using Candida albicans strains with different patterns of enzymatic activity BJM
Chaves,Guilherme M.; Cavalcanti,Maria Auxiliadora de Q.; Carneiro-Leão,Ana Maria dos A.; Lopes,Silvia L..
With the purpose to evaluate Candida albicans virulence in vivo, two strains selected were based on their phospholipase and proteinase activity, and used in a model of experimental infection. One strain, isolated from vaginal secretion, was stocked at the URM Culture Collection for 43 years and presented high phospholipase (Pz=0.217) and proteinase (1.386 U.mL-1) activity. The other strain was a fresh strain isolated from oropharyngeal secretion of an AIDS patient, and presented low phospholipase (Pz=0.482) and proteinase (0.780 U.mL-1) activity. The strains were inoculated via intraperitoneum in immunosuppressed and non-immunosuppressed mice (Mus musculus) and the infection was evaluated over a period of 21 days. Liver, spleen, lungs and kidneys were...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Candida albicans; Extracellular enzymes; Virulence; Experimental infection.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300010
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EXPERIMENTAL MODEL OF CANDIDA ALBICANS (SEROTYPES A AND B) ADHERENCE IN VITRO BJM
Pires,Maria de Fátima Costa; Corrêa,Benedito; Gambale,Walderez; Paula,Claudete Rodrigues.
The adherence of Candida albicans is considered an important virulence factor since it determines the colonization of the yeast in various regions of the host, being the initial cause of the infection. In this work we studied the adherence of C. albicans (serotypes A and B) to HeLa and Vero cells after culture for 18 h and 30 h in chemically defined medium (YNB) plus carbohydrate sources such as glucose, sucrose, maltose, galactose and mannose (500 mM). Each assay was performed in triplicate. The best results were obtained with the medium containing glucose. The adherence was greatest in 18 h cultures at 37ºC and at 1 h contact time. The interaction of yeast cells with the host cells was studied by scanning microscopy.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Candida albicans; Adherence; Serotypes.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822001000300001
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Biotyping and genotypic diversity among oral Candida albicans strains from caries-free and caries-active healthy children BJM
Mardegan,Rita de Cássia; Klein,Marlise Inêz; Golvea,Magda Baglione; Rodrigues,Janaina Aparecida Oliveira; Gonçalves,Reginaldo Bruno; Höfling,José Francisco.
Candida albicans oral strains collected from caries-free and caries-active healthy children ranging from 24 to 36 months old, were studied. The aim of the study was to determine proteinase and phospholipase activities produced by Candida albicans in the two groups and to determine the phenotypic diversity of these enzymes based on genetic polymorphism using the AP-PCR method. Strains identified by morphological and fermentation tests as C. albicans were grown in proteinase and phospholipase agar media at 37ºC for 7 and 4 days, respectively. After the incubation period, the enzyme activity of the proteinase and phospholipase positive strains was measured. All strains were subjected to AP-PCR, using the arbitrary primer AP-3. The enzymatic analysis showed no...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Candida albicans; Genotyping; Proteinase; Phospholipase; Virulence.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000100005
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Effect of alcohols on filamentation, growth, viability and biofilm development in Candida albicans BJM
Chauhan,Nitin M; Shinde,Ravikumar B; Karuppayil,S. Mohan.
In this study we report the potential of alcohols as morphogenetic regulators in Candida albicans. All the alcohols tested influenced various modes of growth like planktonic as well as biofilm forms. Viability was affected at high concentrations. Among the alcohols, the response of C. albicans to amyl alcohol (pentanol) was noteworthy. Amyl alcohol at a concentration 0.5% which was not inhibitory to growth and viability specifically inhibited morphogenetic switching from yeast to hyphal forms. It also inhibited normal biofilm development favoring yeast dominated biofilms. Based on this study we hypothesize that alcohols produced under anaerobic conditions may not favor biofilm development and support dissemination of yeast cells. Since anaerobic conditions...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alcohols; Signalling; Morphogenesis; Biofilms; Yeast metabolism; Candida albicans.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400041
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Cancer drugs inhibit morphogenesis in the human fungal pathogen, Candida albicans BJM
Routh,Madhushree M; Chauhan,Nitin M; Karuppayil,S Mohan.
Candida infections are very common in cancer patients and it is a common practice to prescribe antifungal antibiotics along with anticancer drugs. Yeast to hyphal form switching is considered to be important in invasive candidiasis. Targeting morphogenetic switching may be useful against invasive candidiasis. In this study, we report the antimorphogenetic properties of thirty cancer drugs.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Candida albicans; Morphogenetic switching; Cancer drugs; Antifungal antibiotics.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000300029
Registros recuperados: 42
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