Abdelraouf Ahmed Mohamed Nabil, Al-Hazmi Nawal E, Naguib Deyala M
Soil and Water Research Department, Atomic Energy Authority, Nuclear Research Center, Abou-Zaabl, 13759 Egypt.
Biology Department, Faculty of Science and Arts in Al-Mikhwah, Al-Baha University, Al-Mikhwah, Saudi Arabia.
Indian J Microbiol. 2024 Dec;64(4):1863-1869. doi: 10.1007/s12088-024-01253-2. Epub 2024 Mar 27.
Fungal pathogens cause over a billion human infections annually, leading to more than 1.6 million deaths each year. The scarcity of available antifungal drugs intensifies the public health threat posed by human pathogenic fungal infections. Therefore there is a critical demand for novel, safe, and effective antifungal agents. Although chitinases are established as effective antifungal agents against phytopathogenic fungi, research on their activity against human pathogenic fungi is limited. The present study seeks to investigate the anti-inflammatory and antifungal activity of bacterial and fungal chitinase against human pathogenic fungi. The antifungal efficacy of bacterial chitinase from , fungal chitinase from , and a combination of both was determined by calculating the inhibition percentage in fungal growth, indicated by the reduction in the dry mass of the fungi. Additionally, the anti-inflammatory activity of these chitinases was assessed by measuring the inhibition of albumin denaturation. Results revealed that chitinases exhibited greater antifungal activity compared to the standard. Notably, bacterial chitinase demonstrated higher effectiveness than fungal chitinase against , while the bacterial and fungal chitinase had similar effects against different and . The combination of bacterial and fungal chitinase demonstrated the highest antifungal activity against all tested fungi. Furthermore, the anti-inflammatory activity indicated that chitinases prevented 98% of albumin denaturation, marking the first study reporting the anti-inflammatory role of chitinases in preventing albumin denaturation. Additional in-vivo studies are necessary to explore the antifungal activity of chitinases against human pathogenic fungi and investigate the anti-inflammatory mechanisms of chitinase.
真菌病原体每年导致超过10亿人次的人类感染,每年造成超过160万人死亡。可用抗真菌药物的稀缺加剧了人类致病性真菌感染所带来的公共卫生威胁。因此,对新型、安全且有效的抗真菌药物有着迫切需求。尽管几丁质酶已被确立为对抗植物病原真菌的有效抗真菌剂,但其对人类病原真菌活性的研究却很有限。本研究旨在探究细菌和真菌几丁质酶对人类病原真菌的抗炎和抗真菌活性。通过计算真菌生长抑制率(以真菌干重减少表示)来测定来自[具体细菌名称]的细菌几丁质酶、来自[具体真菌名称]的真菌几丁质酶以及两者组合的抗真菌功效。此外,通过测量白蛋白变性抑制率来评估这些几丁质酶的抗炎活性。结果显示,与标准品相比,几丁质酶表现出更强的抗真菌活性。值得注意的是,细菌几丁质酶对[具体真菌名称1]的效果高于真菌几丁质酶,而细菌和真菌几丁质酶对不同的[具体真菌名称2]和[具体真菌名称3]有相似效果。细菌和真菌几丁质酶的组合对所有测试真菌表现出最高的抗真菌活性。此外,抗炎活性表明几丁质酶可防止98%的白蛋白变性,这是首次报道几丁质酶在防止白蛋白变性方面的抗炎作用的研究。还需要进一步的体内研究来探索几丁质酶对人类病原真菌的抗真菌活性,并研究几丁质酶的抗炎机制。