

FOLLOWUS
1.College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
2.Key Laboratory of Research and Development of Natural Product from Li Folk Medicine of Hainan Province, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Hainan Academy of Tropical Agricultural Resource, Haikou 571101, China
yuzhifang@njau.edu.cn
zhaoyouxing@itbb.org.cn
Received:16 May 2023,
Accepted:24 June 2023,
Online First:17 July 2023,
Published:01 May 2024
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DAI Luting,XIE Qingyi,GUO Jiaocen,et al.Bioactive chemical constituents from the marine-derived fungus Cladosporium sp. DLT-5[J].Journal of Oceanology and Limnology,2024,42(03):905-914.
A new isochromanone
cladosporinisochromanone (
1
)
accompanied by 15 known compounds (
2
–
16
) were obtained from secondary metabolites produced by marine-derived fungus
Cladosporium
sp. DLT-5. NMR and HRESIMS spectra elucidation determined the planar structure of
1
. Subsequent electronic circular dichroism (ECD) experiment assigned the absolute configuration of
1
. Compounds
1
2
4
–
6
and
10
displayed different d
egrees of neuroprotective activities on human neuroblastoma cells SH-SY5Y. Five compounds (
1
3
–
5
and
13
) emerged resistance to protein tyrosine phosphatase 1B (PTP1B)
further kinetic analysis and molecular docking study indicated that the most potent compound
13
(IC
50
value of 10.74±0.61 μmol/L) was found as a noncompetitive inhibitor for PTP1B. Surface plasmon resonance (SPR) and molecular docking studies also demonstrated the interaction between compound
12
and Niemann-Pick C1 Like 1 (NPC1L1)
which has been identified as significant therapeutic target for hypercholesteremia. In addition
compounds
3
6
and
14
showed attractive inhibitory activity against the phytopathogenic fungi:
Colletotrichum capsici
. Therefore
library of
Cladosporium
metabolites is enriched and new active uses of known compounds are explored.
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