Public Health Research Institute, New Jersey Medical School, Rutgers Biomedical and Health Sciences, Newark, New Jersey, USA.
Department of Clinical Laboratory, Beijing Key Laboratory for Mechanisms Research and Precision Diagnosis of Invasive Fungal Diseases (BZ0447), Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China.
Antimicrob Agents Chemother. 2018 Dec 21;63(1). doi: 10.1128/AAC.01811-18. Print 2019 Jan.
is an emerging multidrug-resistant yeast that can cause serious invasive infections. The accurate and rapid assessment of antifungal resistance is important for effective patient management. A novel and highly accurate diagnostic platform was established for the rapid identification of mutations conferring azole resistance and mutations associated with echinocandin resistance in Using allele-specific molecular beacons and DNA melting curve analysis following asymmetric PCR, a duplex assay and a simplex HS1 assay were developed to identify the most prominent resistance-associated mutations (Y132F and K143R in ; S639F in HS1) within 2 h. Assays were validated by testing a panel of 94 clinical isolates in a blind manner. The molecular diagnostic results from the assays were 100% concordant with DNA sequencing results. This platform has the potential to overcome the deficiencies of existing susceptibility-based assays to identify azole- and/or echinocandin-resistant , and thus, it holds promise as a surrogate diagnostic method to direct antifungal therapy more effectively.
是一种新兴的多药耐药酵母,可导致严重的侵袭性感染。准确快速地评估抗真菌药物耐药性对于有效管理患者至关重要。本研究建立了一种新颖而高度准确的诊断平台,用于快速鉴定导致唑类耐药的 突变和棘白菌素类耐药相关的 突变。通过等位基因特异性分子信标和不对称 PCR 后的 DNA 熔解曲线分析,开发了一种双管 检测和单管 HS1 检测,以在 2 小时内鉴定最主要的耐药相关突变( 中的 Y132F 和 K143R; 中的 S639F)。通过以盲法方式测试 94 株临床分离株的检测对该方法进行了验证。检测的分子诊断结果与 DNA 测序结果完全一致。该平台有可能克服现有基于药敏试验的检测方法在鉴定唑类和/或棘白菌素类耐药 方面的不足,因此有望成为一种替代诊断方法,更有效地指导抗真菌治疗。