Tumor necrosis factor-α(TNF-α)is a promising target for inflammatory and autoimmune diseases.Spirohypertones A(1)and B(2),two unprecedented polycyclic polyprenylated acylphloroglucinols with highly rearranged skelet...Tumor necrosis factor-α(TNF-α)is a promising target for inflammatory and autoimmune diseases.Spirohypertones A(1)and B(2),two unprecedented polycyclic polyprenylated acylphloroglucinols with highly rearranged skeletons,were isolated from Hypericum patulum.The structures of 1 and 2 were confirmed through comprehensive spectroscopic analysis,single-crystal X-ray diffraction and electronic circular dichroism calculations.Importantly,2 showed remarkable TNF-αinhibitory activity,which could protect L929 cells from death induced by co-incubation with TNF-αand actinomycin D.It also demonstrated the ability to suppress the inflammatory response in HaCaT cells stimulated with TNF-α.Notably,in an imiquimod-induced psoriasis murine model,2 restrained symptoms of epidermal hyperplasia associated with psoriasis,presenting anti-inflammatory and antiproliferative effects.This discovery positions 2 as a potent TNF-αinhibitor,providing a promising lead compound for developing an antipsoriatic agent.展开更多
Psoriasis is a chronic immune-mediated inflammatory skin disease and the TNF-αis an important therapeutic target of this disease.In our continuous study of bioactive natural products from fungi,the first ergosterol-p...Psoriasis is a chronic immune-mediated inflammatory skin disease and the TNF-αis 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,(36,5α,6α,22E)-5,6-epoxy-3-hydroxyergosta-8,22-dien-7-one(3)and calvasterol B(4),were iso-lated 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 path-ways were proposed to include intermolecular cyclization and Diels-Alder reactions.Activity screen of these isolates showed that 1-3 could improve the cell viability in an actinomycin D/TNF-αinduced L929 cells death model,with the EC50 values of 49.85,46.75 and 4.99μmol/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-αin 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-αinhibitory agents in the clinical treatment of psoriasis.展开更多
基金supported by the Program for Changjiang Scholars of Ministry of Education of the People's Republic of China(T2016088)the National Natural Science Foundation for Distinguished Young Scholars(81725021,China)the National Natural Science Foundation of China(Nos.82003633,32100321 and 32300335)+4 种基金the National Natural Science Foundation of Hubei Province(2023AFB791 and 2023AFB530,China)Knowledge Innovation Project of Wuhan Science and Technology Bureau(2023020201020534,China)the Research and Development Program of Hubei Province(2020BCA058,China)the Open Foundation of Hubei Key Laboratory of Wudang Local Chinese Medicine Research(WDCM2023010,China)Funded by Open Research Fund Program of State Key Laboratory of Biocatalysis and Enzyme Engineering(SKLBEE2023003,China).
文摘Tumor necrosis factor-α(TNF-α)is a promising target for inflammatory and autoimmune diseases.Spirohypertones A(1)and B(2),two unprecedented polycyclic polyprenylated acylphloroglucinols with highly rearranged skeletons,were isolated from Hypericum patulum.The structures of 1 and 2 were confirmed through comprehensive spectroscopic analysis,single-crystal X-ray diffraction and electronic circular dichroism calculations.Importantly,2 showed remarkable TNF-αinhibitory activity,which could protect L929 cells from death induced by co-incubation with TNF-αand actinomycin D.It also demonstrated the ability to suppress the inflammatory response in HaCaT cells stimulated with TNF-α.Notably,in an imiquimod-induced psoriasis murine model,2 restrained symptoms of epidermal hyperplasia associated with psoriasis,presenting anti-inflammatory and antiproliferative effects.This discovery positions 2 as a potent TNF-αinhibitor,providing a promising lead compound for developing an antipsoriatic agent.
基金supported financially by the National Natural Science Foundation for Distinguished Young Scholars (No.81725021)the National Natural Science Foundation of China (Nos.82003633,82173705 and 31972865)+2 种基金the Natural Science Foundation of Hubei Province (2023AFB791)the Research and Development Program of Hubei Province (2020BCA058)the Open Foundation of Hubei Key Laboratory of Wudang Local Chinese Medicine Research (WDCM2023010).
文摘Psoriasis is a chronic immune-mediated inflammatory skin disease and the TNF-αis 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,(36,5α,6α,22E)-5,6-epoxy-3-hydroxyergosta-8,22-dien-7-one(3)and calvasterol B(4),were iso-lated 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 path-ways were proposed to include intermolecular cyclization and Diels-Alder reactions.Activity screen of these isolates showed that 1-3 could improve the cell viability in an actinomycin D/TNF-αinduced L929 cells death model,with the EC50 values of 49.85,46.75 and 4.99μmol/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-αin 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-αinhibitory agents in the clinical treatment of psoriasis.