Journals / Mikrobiyoloji Bülteni / 2010 / Cilt: 44 - Sayı: 1

İn vitro synergistic effect of moxifloxacin and amphotericin B combination against Candida strains

Moksifioksasin ve amfoterisin B kombinasyonunun Candida türleri üzerine in vitro sinerjistik etkisi

Pages
65–70
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

It was concluded that these preliminary results should be confirmed by large-scaled in vitro and in vivo studies to evaluate MOX + AmB combination as a therapeutic option for the treatment of Candida infections.

📌 3 Key Takeaways

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Objective & Hypothesis:Contradictory results such as synergy or indifferent effect, have been reported about the interactions between quinolones and antifungal drugs in different studies.
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Key Findings & Data:A total of 20 strains were included to the study, of which 19 were clinical isolates (10 Candida albicans, 4 Candida glabrata, 2 Candida parapsilosis, 1 Candida tropicalis, 1 Candida pellicu-losa ve 1 Candida sake) and 1 was a standard strain (C.albicans ATCC 90028).
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Conclusion & Impact:It was concluded that these preliminary results should be confirmed by large-scaled in vitro and in vivo studies to evaluate MOX + AmB combination as a therapeutic option for the treatment of Candida infections.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Contradictory results such as synergy or indifferent effect, have been reported about the interactions between quinolones and antifungal drugs in different studies. The aim of this study was to investigate the in vitro susceptibilities of Candida spp. to moxifloxacin (MOX) alone and MOX + amphotericin B (AmB) combination. A total of 20 strains were included to the study, of which 19 were clinical isolates (10 Candida albicans, 4 Candida glabrata, 2 Candida parapsilosis, 1 Candida tropicalis, 1 Candida pellicu-losa ve 1 Candida sake) and 1 was a standard strain (C.albicans ATCC 90028). In vitro susceptibilities of the strains to MOX with AmB were investigated by broth microdilution method according to the recommendations of the Clinical and Laboratory Standards Institute (CLSI), and in vitro interaction of these drugs were determined by a chequerboard titration method. Minimal inhibitory concentration (MIC) values of Candida spp. for MOX were found > 400 ug/ml indicating that MOX, by itself has no antifungal activity. AmB MIC values were found 1 ug/ml in 11 of the clinical isolates, and < 0.5 ug/ml in the other 8 clinical isolates and 1 standard strain. The inhibitor activity of AmB was slightly enhanced when combined with MOX, there being a decrease of 1-4 fold dilutions in the AmB MICs against all isolates tested. Synergistic effect between MOX and AmB, defined as a fractional inhibitory concentration (FIC) index as < 0.5, was observed in 90% (18/20; all were clinical isolates) of the strains, whereas indifferent effect (FIC= 1) was detected in 10% (2/20; 1 was clinical and 1 was standard strain) of the strains. Antagonistic effect was not observed for this combination even at 48th hours. It was concluded that these preliminary results should be confirmed by large-scaled in vitro and in vivo studies to evaluate MOX + AmB combination as a therapeutic option for the treatment of Candida infections.

Özet

Yapılan çalışmalarda, kinolonların antifungal ilaçların etkinliğini artırdıkları ya da aralarında herhangi bir etkileşim bulunmadığını bildiren çelişkili sonuçlar alınmıştır. Bu çalışmada, Candida suşlarının tek başlarına moksifloksasin (MOX)'e ve MOX + amfoterisin B (AmB) kombinasyonuna karşı in vitro duyarlılıklarının araştırılması amaçlanmıştır. Çalışmaya, 10 Candida albicans, 4 Candida glabrata, 2 Candida parapsi-losis, 1 Candida tropicalis, 1 Candida pelliculosa ve 1 Candida sake olmak üzere 19 klinik Candida izolatı ile C.albicans ATCC 90028 standart susu olmak üzere toplam 20 suş dahil edilmiştir. MOX ve AmB kombinasyonunun in vitro etkinliği, "Clinical and Laboratory Standards Institute (CLSI)" önerilerine uygun olarak sıvı mikrodilüsyon ve dama tahtası (checkerboard) yöntemleri kullanılarak değerlendirilmiştir. Çalışmamızda, Candida türlerinin MOX için minimum inhibitor konsantrasyonu (MİK) değerleri > 400 Mg/ml olarak bulunmuş ve MOX'un tek başına Candida türleri üzerine antifungal etki göstermediği saptanmıştır. AmB MİK değerleri ise, 11 klinik suş için 1 ug/ml; 8 klinik suş ile standart suş için ise < 0.5 ug/ml olarak tespit edilmiştir. AmB ile MOX kombinasyonunda, AmB MİK değerleri bütün suşlar için 1-4 dilüs-yon arasında azalma göstermiş, AmB'nin MOX ile kombine edildiğinde inhibitor etkisinin arttığı belirlenmiştir. Hesaplanan fraksiyonel inhibitor konsantrasyonu (FİK) indeksi, AmB ve MOX kombinasyonunun, suşların %90 (18/20; tümü klinik suşlar)'ı üzerinde sinerjistik etki (FİK < 0.5), %10 (2/20; Ti klinik, 1'i standart suş) üzerinde ise "indifferent" etki (FİK= 1) gösterdiğini ortaya koymuştur. Kombinasyon testinin 48. saatinde bile antagonizma görülmemiştir. Sonuç olarak, bulgularımızın daha fazla tür ve sayıda izolatı içeren in vitro ve in vivo çalışmalar ile desteklenmesi durumunda, Candida türleri tarafından oluşturulan enfeksiyonların tedavisinde yararlı olabilecek yeni kombinasyon seçenekleri sağlayabileceği düşünülmüştür.

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Cite This Article

YALÇIN, B., KALKANCI, A., GÜRELİK, F., FİDAN, I., KUŞTİMUR, S., ÖZDEK, Ş. (2010). İn vitro synergistic effect of moxifloxacin and amphotericin B combination against Candida strains. Mikrobiyoloji Bülteni, Cilt: 44 - Sayı: 1, 65–70. https://ajindex.com/articles/298886

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