TR Dizin İndeksli Yayınlar / TR Dizin Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7149

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Department: search.filters.department.İzmir Institute of Technology. ChemistryPublisher: search.filters.publisher.Ankara Microbiology Society

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  • Article
    Citation - WoS: 2
    Türkiye’de Kutanöz Leyşmanyazis Hastalarından Elde Edilen Leishmania İzolatlarındaki Farklılıklar ve Bunların Fare Modeline Klinik Yansıması
    (Ankara Microbiology Society, 2020) Özbilgin, Ahmet; Çulha, Gülnaz; Güray, Melda Zeynep; Zeyrek, Fadile Yıldız; Akyar, Işın; Toz, Seray; Gündüz, Cumhur
    Although asexual reproduction has been attributed to Leishmania species, genetic exchange has recently been demonstrated, which helped emerging of hybrid isolates. Situated on the crossroads between three continents, Leishmania hybrids may be present in Turkey. In Turkey, visceral leishmaniasis caused by Leishmania infantum is less common, while cutaneous leishmaniasis (CL) caused by Leishmania tropica and L.infantum could reach 2500 reported cases a year. Our aim was to investigate genetic variability of local Leishmania species and presence of hybrid Leishmania strains in Turkey. Twenty CL patients from Sanliurfa and Hatay, where only L.tropica and both L.tropica and L.infantum cause CL, respectively, were registered equally. All isolates were assessed with real-time polymerase chain reaction (Rt-PCR), isoenzyme analysis, gene sequencing, two-dimensional gel electrophoresis (2D-PAGE) and MALDI-TOF/TOF-MS followed by in vivo analyses on mouse model. Identification of differentially expressed proteins was performed. These proteins were confirmed by sequence analysis. All isolates from Sanliurfa were found to be L.tropica which caused cutaneous infection in mice. However, one of 10 isolates from Hatay was found as Leishmania major which caused cutaneous infection. Five isolates were found as L.tropica with Rt-PCR and gene sequencing, one of which had one different protein from the reference L.tropica strain and caused cutaneous infection. Four of the five isolates had five different proteins compared to reference strain and caused both cutaneous and visceral infections. Remaining four isolates showed double melting curves in Rt-PCR, which were concordant with L.tropica and L.infantum. Their sequencing and isoenzyme analyses indicated them as L.infantum. They had six different proteins compared to reference L.infantum strain and caused cutaneous and visceral infections. It is concluded that the isolates with different proteins were hybrid Leishmania species. In the present study, outcomes of the proteomics, genomics, clinical manifestations and tissue tropism on animal models were evaluated together for the first time. In addition to L. tropica and L.infantum, L.major was identified as a causative agent for CL and hybrids of Linfantum/tropica were also shown to be present.
  • Article
    Fourier Dönüşümlü Kızılötesi (ft-ır) Spektroskopisi ile Malassezia Türlerinin Değerlendirilmesi
    (Ankara Microbiology Society, 2011) Ergin, Çağrı; Vuran, M. Emre; Gök, Yaşar; Özdemir, Durmuş; Karaarslan, Aydın; Kaleli, İlknur; Çon, Ahmet Hilmi
    Malassezia türleri, normal deri florasının üyesi kabul edilen, cilt enfeksiyonlarına da yol açabilen lipofilik ekzobasidiyomiçet mantarlardır. Rutin mikrobiyoloji laboratuvarlarında uygulanan fenotipik karakterlere dayalı tür tanımlaması her zaman için taksonomik araştırmalarla uyumlu olmayabilmektedir. Lipofilik ve lipide bağımlı Malassezia türleri lipid ile zenginleştirilmiş besiyerlerine gereksinim gösterir. Bu nedenle, lipid bölgesine odaklanmış Fourier dönüşümlü kızılötesi (Fourier transform infrared; FT-IR) spektroskopisi, Malassezia türlerinin tanımlanmasında yardımcı olabilir. Bu çalışmada, insan patojeni olan 10 farklı türe ait standart Malassezia suşu (M.dermatis CBS 9145, M.furfur CBS 7019, M.japonica CBS 9432, M.globosa CBS 7966, M.nana CBS 9561, M.obtusa CBS 7876, M.pachydermatis CBS 1879, M.slooffiae CBS 7956, M.sympodialis CBS 7222 ve M.yamatoensis CBS 9725), modifiye Dixon agar besiyerinde standart kültürü takiben FT-IR spektroskopisi ile incelenmiştir. Çalışmamızda, tüm spektrum analizi ile iki ana grup (M1 grubu; M.globosa, M.obtusa, M.sympodialis, M.dermatis, M.pachydermatis ve M2 grubu; M.furfur, M.japonica, M.nana, M.slooffiae, M.yamatoensis) ayırımı yapılmıştır. M1 grubunda; M.obtusa’nın 1686-1606 $cm^ {-1}$, M2 grubunda M.japonicum’un 2993-2812 $cm^ {-1}$ dalga sayısı penceresinde yapılan ikinci basamak işlemlerinde, düşük düzeyde ayırım gücü ile tanımlandığı görülmüştür. Bununla birlikte, M.sympodialis, M.globosa ve M.pachydermatis ile M.furfur ve M.yamatoensis’in birbirlerinden ayırım gösterdiği bölgeler saptanamamıştır. Sonuç olarak, farklı spektral bölgelerin analiz verilerine göre; FT-IR spektroskopik analizinin, standart kültürü yapılan Malassezia türlerinin ayırımında yeterli olmadığı kanısına varılmıştır.