Volume 42, Issue 7 pp. 743-751
Concise Report

Polyaspers A and B, the First Ergosterol-Polyether Adducts with Unprecedented 6/6/6/5/5/6/6/6/6 Nonacyclic Architecture from Aspergillus sp. TJ507

Hong Hu

Hong Hu

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

These authors contributed equally to this work.

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Lanqin Li

Lanqin Li

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

These authors contributed equally to this work.

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Zhengyi Shi

Zhengyi Shi

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

These authors contributed equally to this work.

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Xueqi Lan

Xueqi Lan

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

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Yeting Zhang

Yeting Zhang

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

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Xinye Huang

Xinye Huang

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

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Xincai Hao

Xincai Hao

Hubei Key Laboratory of Wudang Local Chinese Medicine Research, Hubei Engineering Technology Center for Comprehensive Utilization of Medicinal Plants, College of Pharmacy, Hubei University of Medicine, Shiyan, Hubei, 442000 China

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Qun Zhou

Qun Zhou

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

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Weiguang Sun

Corresponding Author

Weiguang Sun

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

E-mail: [email protected]; [email protected]; [email protected]Search for more papers by this author
Changxing Qi

Corresponding Author

Changxing Qi

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

Institute of Organ Transplantation, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Key Laboratory of Organ Transplantation, Ministry of Education, NHC Key Laboratory of Organ Transplantation, Key Laboratory of Organ Transplantation, Chinese Academy of Medical Sciences, Wuhan, Hubei, 430030 China

E-mail: [email protected]; [email protected]; [email protected]Search for more papers by this author
Yonghui Zhang

Corresponding Author

Yonghui Zhang

Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, 430030 China

E-mail: [email protected]; [email protected]; [email protected]Search for more papers by this author
First published: 11 December 2023

Comprehensive Summary

Psoriasis is a chronic immune-mediated inflammatory skin disease and the TNF-α is an important therapeutic target of this disease. In our continuous study of bioactive natural products from fungi, the first ergosterol-polyether adducts, polyaspers A (1) and B (2), along with two known ergosterols, (3β,5α,6α,22E)-5,6-epoxy-3-hydroxyergosta-8,22-dien-7-one (3) and calvasterol B (4), were isolated from Aspergillus sp. TJ507. Structure elucidation was accomplished by extensive spectroscopic analysis and single-crystal X-ray diffraction tests. Polyaspers A and B possessing an unequalled 6/6/6/5/5/6/6/6/6 nonacyclic system, and their biosynthetic pathways were proposed to include intermolecular cyclization and Diels-Alder reactions. Activity screen of these isolates showed that 13 could improve the cell viability in an actinomycin D/TNF-α induced L929 cells death model, with the EC50 values of 49.85, 46.75 and 4.99 μmol/L, respectively, and the activity of 3 was even comparable with that of the positive control SPD304. Further bioactive investigations discovered 3 could suppress the inflammatory response simulated with TNF-α in HaCaT cells. In an imiquimod-induced psoriasis murine model, 3 significantly restrained the development of psoriasis symptoms and reduced the expression of IL-17 and IL-23, presenting an anti-psoriatic effect. As such, those ergosterol derivatives, might serve as lead compounds for the development of novel TNF-α inhibitory agents in the clinical treatment of psoriasis. image

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