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2016 ; 7
(ä): 1307
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Pseudopyronine B: A Potent Antimicrobial and Anticancer Molecule Isolated from a
Pseudomonas mosselii
#MMPMID27617005
Nishanth Kumar S
; Aravind SR
; Jacob J
; Gopinath G
; Lankalapalli RS
; Sreelekha TT
; Dileep Kumar BS
Front Microbiol
2016[]; 7
(ä): 1307
PMID27617005
show ga
In continuation of our search for new bioactive compounds from soil microbes, a
fluorescent Pseudomonas strain isolated from paddy field soil of Kuttanad,
Kerala, India was screened for the production of bioactive secondary metabolites.
This strain was identified as Pseudomonas mosselii through 16S rDNA gene
sequencing followed by BLAST analysis and the bioactive metabolites produced were
purified by column chromatography (silica gel) and a pure bioactive secondary
metabolite was isolated. This bioactive compound was identified as Pseudopyronine
B by NMR and HR-ESI-MS. Pseudopyronine B recorded significant antimicrobial
activity especially against Gram-positive bacteria and agriculturally important
fungi. MTT assay was used for finding cell proliferation inhibition, and
Pseudopyronine B recorded significant antitumor activity against non-small cell
lung cancer cell (A549), and mouse melanoma cell (B16F10). The preliminary MTT
assay results revealed that Pseudopyronine B recorded both dose- and
time-dependent inhibition of the growth of test cancer cell lines. Pseudopyronine
B induced apoptotic cell death in cancer cells as evidenced by Acridine
orange/ethidium bromide and Hoechst staining, and this was further confirmed by
flow cytometry analysis using Annexin V. Cell cycle analysis also supports
apoptosis by inducing G2/M accumulation in both A549 and B16F10 cells.
Pseudopyronine B treated cells recorded significant up-regulation of caspase 3
activity. Moreover, this compound recorded immunomodulatory activity by enhancing
the proliferation of lymphocytes. The production of Pseudopyronine B by P.
mosselii and its anticancer activity in A549 and B16F10 cell lines is reported
here for the first time. The present study has a substantial influence on the
information of Pseudopyronine B from P. mosselii as potential sources of novel
drug molecule for the pharmaceutical companies, especially as potent
antimicrobial and anticancer agent.