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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Front+Microbiol
2017 ; 8
(ä): 1251
Nephropedia Template TP
gab.com Text
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English Wikipedia
A Novel Derivative of (-)mycousnine Produced by the Endophytic Fungus
Mycosphaerella nawae, Exhibits High and Selective Immunosuppressive Activity on T
Cells
#MMPMID28725220
Wang LW
; Wang JL
; Chen J
; Chen JJ
; Shen JW
; Feng XX
; Kubicek CP
; Lin FC
; Zhang CL
; Chen FY
Front Microbiol
2017[]; 8
(ä): 1251
PMID28725220
show ga
An endophytic fungus, Mycosphaerella nawae ZJLQ129, was isolated from the leaves
of the traditional Chinese medicine Smilax china. From the fermentation broth and
mycelium, a dibenzofurane compound (-)mycousnine (1) was isolated. Chemical
modification of it to the amide derivative (-)mycousnine enamine (2), which is
new to science, was found to have high and selective immunosuppressive activity:
similar to cyclosporin A, (-)mycousnine enamine (2) selectively inhibited T cell
proliferation, suppressed the expression of the surface activation antigens CD25
and CD69 and the formation and expression of the cytokines interleukin-2 as well
as interferon ? in activated T cells, but did not show any effect on the
proliferation of B cells and cancer cells (PANC-1 and A549) and the activation of
macrophages. Furthermore, the cytotoxicity of (-)mycousnine enamine was lower
than that of cyclosporin A, and its therapeutic index (TC50/EC50) was 4,463.5,
which is five-fold higher than that of cyclosporin A. We conclude that
(-)mycousnine enamine (2), the semi-synthestic product prepared from the native
product (-)mycousnine (1) of the endophyte M. nawae is a novel effective
immunosuppressant showing low toxicity and high selectivity.