Journal
PLANTA MEDICA
Volume 82, Issue 3, Pages 190-194Publisher
GEORG THIEME VERLAG KG
DOI: 10.1055/s-0035-1558142
Keywords
Clusiaceae; geopropolis; Melipona scutellaris; cytotoxity; coumarins
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Funding
- NIH, National Cancer Institute, Center for Cancer Research
- FAPESP [2011/23635-6, 2012/22002-2]
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Fractionation of geopropolis from Melipona scutellaris, guided by antiproliferative activity against two colon cancer cell lines (COLO205 and KM12), led to the isolation of two new cinnamic acid esters, mammea-type coumarins 5,7-dihydroxy-6(3-methyl-2-butenyl)-8-(4-cinnamoyl-3-methyl-1-oxobutyl)-4-propyl-coumarin (1) and 5,7-dihydroxy-6-(4-cinnamoyl-3-methyl-1-oxobutyl)-4-phenylcoumarin (2), along with five known coumarins, mammeigin (3), hydroxymammeigin (4), mammeisin (5), cinnamoyloxy-mammeisin (6), and mammein (7), and the prenylated benzophenone ent-nemorosone (8). Among the isolated compounds, 5 and 7 showed the highest cell growth inhibition against COLO205 (GI(50) 9.7 and 10.7 mu M, respectively) and KM12 (GI(50) 12.0 and 10.9 mu M, respectively). The presence of these compounds suggests that plants of Clusiaceae family, especially the genera Kielmeyera and Clusia, are likely to be major sources of geopropolis produced by M. scutellaris.
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