Abstract
Phytochemical investigation of the bark from the stems of Sorbus commixta led to the isolation and characterization of a new fatty acid, sorcomic acid (1), along with nine known analogues (2–10). The structure of the new compound (1) was determined through NMR (1H and 13C NMR, HSQC, HMBC, and NOESY), MS, and specific optical rotation. The known compounds (2–10) were identified by comparison of their spectroscopic data with those in the literature. The biological activities of all the isolated compounds (1–10) were evaluated: compounds 1, 5, and 7 potently induced NGF secretion from C6 glioma cells (233.40 ± 12.82, 194.40 ± 8.05, and 185.74 ± 10.25 %, respectively) and compound 10 reduced NO levels with an IC50 value of 71.25 μM in murine microglia BV2 cells stimulated by LPS.
Abbreviations
- COSY:
-
Correlation spectroscopy
- DMEM:
-
Dulbecco’s modified Eagle’s medium
- ELISA:
-
Enzyme-linked immunosorbent assay
- FAB:
-
Fast atom bombardment
- HMBC:
-
Heteronuclear multiple bond correlation
- HPLC:
-
High-performance liquid chromatography
- HR:
-
High resolution
- HSQC:
-
Heteronuclear single quantum coherence
- LPS:
-
Lipopolysaccharide
- MS:
-
Mass spectrometry
- MTPA:
-
Methoxy-α-(trifluoromethyl)phenylacetyl acid
- MTT:
-
3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide
- NGF:
-
Nerve growth factor
- NMR:
-
Nuclear magnetic resonance
- l-NMMA:
-
N G-Monomethyl-l-arginine
- NO:
-
Nitric oxide
- NOESY:
-
Nuclear Overhauser effect spectroscopy
- NOS:
-
Nitric oxide synthase
- SRB:
-
Sulforhodamine B
- TLC:
-
Thin-layer chromatography
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Acknowledgments
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2013R1A1A2A10005315) and partly by the High Value-added Food Technology Development Program, Ministry of Agriculture, Food and Rural Affairs (114006041HD020). We are thankful to the Korea Basic Science Institute (KBSI) for the measurements of NMR and mass spectra.
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Kim, C.S., Suh, W.S., Subedi, L. et al. Neuroprotective Fatty Acids from the Stem Bark of Sorbus commixta . Lipids 51, 989–995 (2016). https://doi.org/10.1007/s11745-016-4172-7
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DOI: https://doi.org/10.1007/s11745-016-4172-7