Poster Presentation HUPO 2019 - 18th Human Proteome Organization World Congress

Identification and proteomic analysis of dermatophytes from human and animal dermatophytosis (#512)

Yasmin Tartor 1 , Marwa Hashem 2 , Shymaa Enany 3
  1. Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
  2. Faculty of Veterinary Medicine, Suez Canal University, Ismailia, Egypt
  3. Microbiology and Immunology Department, Faculty of Pharmacy, Suez Canal University, Ismailia, Egypt

Since accurate identification of dermatophyte species is essential for epidemiological studies and implementing antifungal treatment, overcoming limitations of conventional diagnostics is a fruitful subject. In this study, we investigated real-time polymerase chain reaction (q-PCR), Matrix-Assisted Laser Desorption/ Ionization Time of Flight Mass Spectrometry (MALDI-TOF MS), and nanoelectrospray ionization mass spectrometry (nano-ESI-MS) to detect and identify the most frequently isolated dermatophytes from human and animal dermatophytosis in comparison with conventional methods. Among 200 samples, the identified species were M. canis (78.22%), Trichophyton verrucosum (10.89%), and T. mentagrophytes (5.94%). Q-PCR assay displayed great execution attributes for dermatophytes detection and identification. Using MALDI-TOF MS, M. canis, but none of T. violacium, T. verrucosum or T. mentagrophytes, could be identified. Nano-ESI-MS accurately identify all species. The potential virulence attributes of secreted proteases were anticipated and compared between species. Secreted endoproteases belonging to families/subfamilies of metalloproteases, subtilisins, and aspartic protease were detected. The analyzed exoproteases are aminopeptidases dipeptidyl peptidases and carboxypeptidases. M. canis have three immunogenic proteins, siderophore iron transporter mirB, protease inhibitors, plasma membrane proteolipid 3, and annexin. In essence, q-PCR, MALDI-TOF MS and nano-ESI-MS assays are very nearly defeating difficulties of dermatophytes detection and identification, thereby, supplement or supplant conventional diagnosis of dermatophytosis.