59 research outputs found
HPLC determination of flavonoids in hairy-root cultures of Scutellaria baicalensis Georgi
A simple and sensitive liquid chromatographic method has been
established for determination of the main flavonoid components of
Scutellaria boicolensis Georgi (Lamiaceae) roots and hairy-root
cultures. Wogon, the dried root of the plant, is used in traditional
Chinese medicine for treatment of bronchitis, hepatitis, tumors, and
inflammatory diseases.
Lyophilized hairy roots were extracted with methanol. The crude
extracts were purified by SPE on Supelco LC-8 cartridges. HPLC
separations were performed on a Eurospher 100-C-8 reversed-phase
column. The mobile phase was a gradient prepared from mixtures of
acetonitrile and 0.1% trifluoroacetic acid. Peaks were identified by
addition of standards and/or by diode-array detection. Baicalein
7-O-glucuronide (baicalin), wogonin 7-O-glucuronide (wogonoside),
baicalein, wogonin, and acteoside were determined by the external
standard method at 280 nm. We found that the aglycon (baicalein and
wogonin) content of the transformed roots was consistently higher than
that of the intact root from Siberia
Analysis of polyacetylenes by HPLC in hairy root cultures of Lobelia inflata cultivated in bioreactor
Lobelia inflato L. contains pharmacologically important secondary
metabolites. The main alkaloid is lobeline which has a stimulatory
effect on the respiratory centre. Recently high quantity of
polyacetylenes was determined in the plant and hairy root cultures.
With the aim of increasing of the secondary metabolite production hairy
root cultures were produced (by direct infection of the sterile plants
with Agrobacterium rhizogenes strain R1601). A new HPLC method was
developed for the determination of lobetyolin and lobetyolinin, the
main polyacetylene compounds of L. inflata hairy roots. The analysis
was performed on Hypersil MOS column (250 x 4 mm I.D.). The mobile
phase was 15:85 (v/v) mixture of acetonitrile and water. Peaks were
identified by addition of standards and by DAD. The external
standardized method allowed the determination of lobetyolin and
lobetyolinin with good sensitivity and reliability. This method was
used to measure the polyacetylene contents of hairy roots grew
intensively in bioreactor. High contents of lobetyolin (3.6%) and
lobetyolinin (0.8-1.6%) were detected in the hairy roots because of
their great biosynthetic capacity
HPLC analysis of alizarin and purpurin produced by Rubia tinctorum L. hairy root cultures
We have determined the quantities of the anthraquinones alizarin and
purpurin, with especial regard to their effective antigenotoxic
activity, in genetically transformed hairy root cultures of Rubia
tinctorum L. Hairy roots were cultured on solid and in liquid Gamborg
B5 and 1/2 NMS media in a shaking cabinet and in a bioreactor.
Methanolic extracts of lyophilized hairy roots were hydrolysed, and
then purified by solid phase extraction with good recovery. A new HPLC
method was developed for the determination of alizarin and purpurin.
The analysis was performed on a Luna C8 RP column using a 45:55 (v/v)
mixture of acetonitrile:20 mM ammonium formate-formic acid buffer (pH
3.00) as eluent. Peaks were identified by addition of standards and by
diode-array detection. External standardization allowed the
determination of alizarin and purpurin with good sensitivity and
reliability. The maximum purpurin content was observed in cultures
cultivated on solid B5 medium (5.94 mg g(-1)). The highest alizarin
content was measured in cultures cultivated on solid 1/2 NMS medium
(2.14 mg g(-1))
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