Activity of antimicrobial peptide mimetics in the oral cavity: I. Activity against biofilms of Candida albicans

Background and Purpose: Candida dubliniensis is closely related to the most pathogenic and prevalent yeast, namely C. albicans. Candida species can opportunistically overgrow in vulnerable individuals and cause a variety of diseases. The current study aimed to identify and isolate C. dubliniensis species present in the Candida albicans species complex identified in the oral cavity of drug abusers. Materials and Methods: This study was conducted on 53 strains of C. albicans species complex, isolated from the oral mucosa of drug abusers in Isfahan, Iran. DNA extraction was accomplished through boiling procedure. Duplex polymerase chain reaction (PCR) was performed to amplify ITS1-5.8S-ITS2 region using four specific primers. Fungal species were identified based on the difference in the size of the bands created in the Agarose gel. Results: Out of the 53 isolates under study, 30 (56.6%) and 14 (26.4%) samples were identified as C. albicans and C. dubliniensis, respectively. In the remaining 9 samples (17%), both types of Candida species were confirmed. Conclusion: The findings of the present study revealed the presence of a noticeable amount of C. dubliniensis in the oral cavity of drug abusers. Therefore, the probable presence of this fungus should be considered during the examination of oral infection among this group. To date, no research has directly investigated this issue in Iran.

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Antimicrobial peptide control of pathogenic microorganisms of the oral cavity: A review of the literature

Peptides ◽

10.1016/j.peptides.2012.05.015 ◽

2012 ◽

Vol 36 (2) ◽

pp. 315-321 ◽

Cited By ~ 52

Author(s):

Bruno Rocha da Silva ◽

Victor Aragão Abreu de Freitas ◽

Luiz Gonzaga Nascimento-Neto ◽

Victor Alves Carneiro ◽

Francisco Vassiliepe Sousa Arruda ◽

...

Keyword(s):

Oral Cavity ◽

Antimicrobial Peptide ◽

Pathogenic Microorganisms ◽

Review Of The Literature

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The Prevalence and Occurrence of Candida albicans Among the Students of MAHSA University

Proceedings International ◽

10.33263/proceedings21.089089 ◽

2020 ◽

Vol 2 (1) ◽

pp. 89

Keyword(s):

Candida Albicans ◽

Oral Health ◽

Oral Cavity ◽

Health Knowledge ◽

Study Group ◽

Cross Sectional Survey ◽

Cross Sectional ◽

Unstimulated Saliva ◽

Oral Health Practices ◽

Self Administered Questionnaire

The study is done to identify the prevalence and occurrence of Candida albicans among the students of MAHSA University. It is also done to perform a cross-sectional survey by means of a self-administered questionnaire to assess the oral health knowledge, attitude, and practice (KAP) among the study group. Furthermore, it is done to determine the association of knowledge with attitude, oral health practices, and the prevalence of Candida albicans with the study group. The spores of Candida are a commensal, harmless form of a fungus that becomes invasive and pathogenic pseudohyphae when there is a disruption in the balance of flora. The infection that is caused by the yeast Candida albicans or even other candida species is candidiasis. Questionnaire on oral health was handed out to the students at random in MAHSA University, and upon that, samples are collected by taking their unstimulated saliva and are then pipetted on Sabouraud’s dextrose agar. These agar plates are then kept in an incubator at 37 ℃ for 2 days. After 2 days, the agar plates are then checked for any growth, and if there is the growth seen, gram stain and germ tube tests are done. It was seen that out of 100 samples collected, 40% were positive for Candida albicans, and 60% were negative for Candida albicans. And out of the percentage of positive samples, 26% were males, and 14% were females Candida albicans is the species most frequently implicated in the oral cavity, and it is important to take care of the oral cavity.

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Effect of the crude extract of Eugenia uniflora in morphogenesis and secretion of hydrolytic enzymes in Candida albicans from the oral cavity of kidney transplant recipients

BMC Complementary and Alternative Medicine ◽

10.1186/s12906-015-0522-x ◽

2015 ◽

Vol 15 (1) ◽

Cited By ~ 7

Author(s):

Walicyranison Plinio Silva-Rocha ◽

Vitor Luiz de Brito Lemos ◽

Magda Rhayanny Assunção Ferreira ◽

Luiz Alberto Lira Soares ◽

Terezinha Inês Estivalet Svidzisnki ◽

...

Keyword(s):

Candida Albicans ◽

Oral Cavity ◽

Kidney Transplant ◽

Crude Extract ◽

Hydrolytic Enzymes ◽

Transplant Recipients ◽

Kidney Transplant Recipients ◽

Eugenia Uniflora

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Mucosal IgA Prevents Commensal Candida albicans Dysbiosis in the Oral Cavity

Frontiers in Immunology ◽

10.3389/fimmu.2020.555363 ◽

2020 ◽

Vol 11 ◽

Author(s):

Nicolas Millet ◽

Norma V. Solis ◽

Marc Swidergall

Keyword(s):

Candida Albicans ◽

Oral Cavity

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Correlation between Azole Susceptibilities, Genotypes, and ERG11 Mutations in Candida albicans Isolates Associated with Vulvovaginal Candidiasis in China

Antimicrobial Agents and Chemotherapy ◽

10.1128/aac.00118-10 ◽

2010 ◽

Vol 54 (8) ◽

pp. 3126-3131 ◽

Cited By ~ 24

Author(s):

Shu-Hua Ge ◽

Zhe Wan ◽

Juan Li ◽

Jianping Xu ◽

Ruo-Yu Li ◽

...

Keyword(s):

Candida Albicans ◽

Amino Acid ◽

Oral Cavity ◽

Target Gene ◽

Chinese Women ◽

Missense Mutations ◽

Statistical Support ◽

Strain Sc5314 ◽

The Relationship ◽

Susceptibility Patterns

ABSTRACT The relationship between susceptibilities to fluconazole and itraconazole and microsatellite CAI genotypes were examined from a total of 154 Candida albicans isolates (97 isolates causing vulvovaginitis in Chinese women and 6 vaginal isolates and 51 oral cavity isolates from asymptomatic carriers). The two dominant genotypes, CAI 30-45 (45 isolates) and CAI 32-46 (33 isolates), associated with vulvovaginitis showed significantly different azole susceptibility patterns with strong statistical support. CAI 32-46 isolates were usually less susceptible to both fluconazole and itraconazole than CAI 30-45 isolates and than the oral isolates with other diversified CAI genotypes. Remarkably different mutation patterns in the azole target gene ERG11 were correspondingly observed among C. albicans isolates representing different genotypes and sources. Isolates with the same or similar CAI genotypes usually possessed identical or phylogenetically closely related ERG11 sequences. Loss of heterozygosity in ERG11 was observed in all the CAI 32-46 isolates but not in the CAI 30-45 isolates and most of the oral isolates sequenced. Compared with the ERG11 sequence of strain SC5314 (X13296), two homozygous missense mutations (G487T and T916C) leading to two amino acid changes (A114S and Y257H) in Erg11p were found in CAI 32-46 isolates. The correlation between azole susceptibility and C. albicans genotype may be of potential therapeutic significance.

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Secreted aspartyl proteinases of Candida albicans with particular relevance to the oral cavity

10.5353/th_b3123633 ◽

1997 ◽

Author(s):

Tao Wu

Keyword(s):

Candida Albicans ◽

Oral Cavity ◽

Aspartyl Proteinases

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SSD1 Is Integral to Host Defense Peptide Resistance in Candida albicans

Eukaryotic Cell ◽

10.1128/ec.00402-07 ◽

2008 ◽

Vol 7 (8) ◽

pp. 1318-1327 ◽

Cited By ~ 29

Author(s):

Kimberly D. Gank ◽

Michael R. Yeaman ◽

Satoshi Kojima ◽

Nannette Y. Yount ◽

Hyunsook Park ◽

...

Keyword(s):

Candida Albicans ◽

Antimicrobial Peptides ◽

Antimicrobial Peptide ◽

Host Defense ◽

Genomic Library ◽

Inflammatory Responses ◽

Host Defense Peptides ◽

Antimicrobial Peptide Resistance ◽

Null Mutants

ABSTRACT Candida albicans is usually a harmless human commensal. Because inflammatory responses are not normally induced by colonization, antimicrobial peptides are likely integral to first-line host defense against invasive candidiasis. Thus, C. albicans must have mechanisms to tolerate or circumvent molecular effectors of innate immunity and thereby colonize human tissues. Prior studies demonstrated that an antimicrobial peptide-resistant strain of C. albicans, 36082R, is hypervirulent in animal models versus its susceptible counterpart (36082S). The current study aimed to identify a genetic basis for antimicrobial peptide resistance in C. albicans. Screening of a C. albicans genomic library identified SSD1 as capable of conferring peptide resistance to a susceptible surrogate, Saccharomyces cerevisiae. Sequencing confirmed that the predicted translation products of 36082S and 36082R SSD1 genes were identical. However, Northern analyses corroborated that SSD1 is expressed at higher levels in 36082R than in 36082S. In isogenic backgrounds, ssd1Δ/ssd1Δ null mutants were significantly more susceptible to antimicrobial peptides than parental strains but had equivalent susceptibilities to nonpeptide stressors. Moreover, SSD1 complementation of ssd1Δ/ssd1Δ mutants restored parental antimicrobial peptide resistance phenotypes, and overexpression of SSD1 conferred enhanced peptide resistance. Consistent with these in vitro findings, ssd1 null mutants were significantly less virulent in a murine model of disseminated candidiasis than were their parental or complemented strains. Collectively, these results indicate that SSD1 is integral to C. albicans resistance to host defense peptides, a phenotype that appears to enhance the virulence of this organism in vivo.

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