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在环境和临床环境中具有多极端耐受性、机会性且由黑色素驱动的适应性强的黑色酵母皮炎外瓶霉

Polyextremotolerant, opportunistic, and melanin-driven resilient black yeast Exophiala dermatitidis in environmental and clinical contexts.

作者信息

de León Lyselle Ruíz, Moreno-Perlín Tonatiuh, Castillo-Marenco Tania, Del Rayo Sánchez-Carbente María, Gostinčar Cene, Ramírez-Durán Ninfa, Ocaña Ana María Fernández, Sánchez Nilda C, Dávila-Ramos Sonia, Gunde-Cimerman Nina, Batista-García Ramón Alberto

机构信息

Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, MOR, Mexico.

Centro de Investigación en Biotecnología, Universidad Autónoma del Estado de Morelos, Cuernavaca, MOR, Mexico.

出版信息

Sci Rep. 2025 Feb 22;15(1):6472. doi: 10.1038/s41598-025-88595-z.

Abstract

Exophiala dermatitidis, a polyextremotolerant black yeast, thrives in diverse natural and human-made environments. Additionally, it is an opportunistic pathogen, capable of infecting immunocompromised individuals, particularly causing neurotropic infections. This study examined 41  E. dermatitidis strains from diverse environments, investigating their growth under different temperatures, NaCl concentrations, and pH levels. Optimal growth occurred at 28 °C, with large variations among strains at other temperatures, from 4 to 42 °C. Growth was enhanced at 5% NaCl, though strains also grew at 10% and 17% NaCl. Growth varied across different pH levels, from pH 2.5 to 12.5. Most strains showed the highest biofilm formation at 37 °C, α- and γ-hemolysis and resistance to antifungal agents. Better growth was detected on neurotransmitters than on (poly)aromatic compounds. High-throughput metabolic analyses revealed consistent oxidation patterns across 94 carbon sources in five selected strains. Genomic analysis revealed a diverse repertoire of carbohydrate-active enzymes and pathways for degrading polyaromatic hydrocarbons and neurotransmitters. Melanin biosynthesis inhibitor tricyclazole minimally affected E. dermatitidis growth under stress, but induced morphological changes in some cases. This study underscores E. dermatitidis' urban extremophilic nature, with high resilience, metabolic adaptability, and potential for heightened pathogenicity in evolving global conditions.

摘要

皮炎外瓶霉是一种多极端耐受性的黑色酵母,能在各种自然和人造环境中茁壮成长。此外,它还是一种机会致病菌,能够感染免疫功能低下的个体,尤其会引发嗜神经感染。本研究检测了来自不同环境的41株皮炎外瓶霉菌株,研究它们在不同温度、氯化钠浓度和pH值水平下的生长情况。最适宜生长温度为28°C,在4至42°C的其他温度下,菌株间差异较大。在5%氯化钠浓度下生长增强,不过菌株在10%和17%氯化钠浓度下也能生长。在pH值2.5至12.5的不同水平下,生长情况有所不同。大多数菌株在37°C时生物膜形成最多,具有α-和γ-溶血现象以及抗真菌药物耐药性。在神经递质上的生长情况优于在(多)芳香化合物上的生长情况。高通量代谢分析显示,在五个选定菌株中,94种碳源的氧化模式一致。基因组分析揭示了多种碳水化合物活性酶以及降解多环芳烃和神经递质的途径。黑色素生物合成抑制剂三环唑在应激条件下对皮炎外瓶霉生长的影响最小,但在某些情况下会诱导形态变化。本研究强调了皮炎外瓶霉的城市极端嗜性,具有高恢复力、代谢适应性以及在不断变化的全球环境中致病性增强的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a587/11846982/8314ffd2d717/41598_2025_88595_Fig1_HTML.jpg

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