Saiprom Natnaree, Wongsuk Thanwa, Oonanant Worrapoj, Sukphopetch Passanesh, Chantratita Narisara, Boonsilp Siriphan
Department of Microbiology and Immunology, Faculty of Tropical Medicine, Mahidol University, Bangkok 10400, Thailand.
Department of Clinical Pathology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand.
J Fungi (Basel). 2023 Mar 14;9(3):353. doi: 10.3390/jof9030353.
Candidemia is often associated with high mortality, and and are common causes of this disease. The pathogenicity characteristics of specific spp. that cause candidemia in Thailand are poorly understood. This study aimed to characterize the virulence factors of spp. Thirty-eight isolates of different species from blood cultures were evaluated for their virulence properties, including exoenzyme and biofilm production, cell surface hydrophobicity, tissue invasion, epithelial cell damage, morphogenesis, and phagocytosis resistance; the identity and frequency of mutations in contributing to azole-resistance were also determined. had the highest epithelial cell invasion rate and phospholipase activity, with true hyphae formation, whereas produced the most biofilm, hydrophobicity, protease activity, and host cell damage and true hyphae formation. mutations Y132F and S154F were observed in all azole-resistant . had the most hemolytic activity while cell invasion was low with no morphologic transition. was more easily phagocytosed than other species. generated pseudohyphae but not hyphae and did not exhibit any trends in exoenzyme production. This knowledge will be crucial for understanding the pathogenicity of spp. and will help to explore antivirulence-based treatment.
念珠菌血症常与高死亡率相关,[具体因素1]和[具体因素2]是该疾病的常见病因。在泰国,引起念珠菌血症的特定念珠菌属物种的致病特性尚不清楚。本研究旨在表征念珠菌属物种的毒力因子。对来自血培养的38株不同念珠菌属物种的菌株进行了毒力特性评估,包括胞外酶和生物膜产生、细胞表面疏水性、组织侵袭、上皮细胞损伤、形态发生和抗吞噬作用;还确定了与唑类耐药相关的[相关基因]突变的身份和频率。[念珠菌属物种1]具有最高的上皮细胞侵袭率和磷脂酶活性,形成真正的菌丝,而[念珠菌属物种2]产生的生物膜、疏水性、蛋白酶活性、宿主细胞损伤和真正的菌丝形成最多。在所有唑类耐药的[念珠菌属物种]中均观察到[相关基因]突变Y132F和S154F。[念珠菌属物种3]具有最强的溶血活性,而细胞侵袭率低且无形态转变。[念珠菌属物种4]比其他物种更容易被吞噬。[念珠菌属物种5]产生假菌丝但不产生菌丝,并且在胞外酶产生方面没有表现出任何趋势。这些知识对于理解念珠菌属物种的致病性至关重要,并将有助于探索基于抗毒力的治疗方法。