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Indian Journal of Biochemistry and Biophysics (IJBB) >
IJBB Vol.48 [2011] >
IJBB Vol.48(5) [October 2011] >
| Title: | Effects of kale (Brassica oleracea L. var. acephala DC) leaves extracts on the susceptibility of very low and low density lipoproteins to oxidation |
| Authors: | Kural, Birgül Vanizor
Küçük, Nurçin
Yücesan, Fulya Balaban
Örem, Asim |
| Keywords: | Brassica oleraceae L. var. acephala DC.
Kale
Antioxidants
Lipoprotein oxidation |
| Issue Date: | Oct-2011 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | Of Brassicaceous plants, kale (Brassica oleraceae L. var. acephala DC)
contains polyphenols, flavonoids, isoflavones and glucosinolates and so has
antioxidant and anticarcinogenic properties. Antioxidants inhibit negative
effects of free radicals and may, therefore, protect tissues against oxidative
damage. Oxidation of lipoproteins is a key event in the development of
atherosclerosis. In the current study, the levels of total phenolic and
flavonoid contents and total antioxidant capacity of methanolic and aqueous
extracts of kale leaves were determined. In addition, the susceptibility of
isolated lipoproteins — very low density lipoprotein (VLDL) and low density
lipoprotein (LDL) to the
Cu2+-induced oxidation with various concentrations of metanolic and
aqueous extracts was evaluated as t-lag values. Although aqueous extract had higher
total antioxidant capacity, methanolic extract had higher total phenolic and
flavonoid content (P<0.05). On the other hand, both extracts inhibited lipid
peroxidation in both isolated VLDL and LDL. Inhibitory effect of extracts or
increasing t-lag values, mainly in methanolic extract was found to be related
to increasing the concentration of extracts. It was concluded that because of
high antioxidant capacity and phenolic content, kale showed a protective effect
on the oxidation of lipoproteins. Therefore, it may be speculated that kale
consumption may play an important protective role in the cardiovascular and
other related diseases resulting from imbalance of oxidant and antioxidant
status. |
| Page(s): | 361-364 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-0959 (Online); 0301-1208 (Print) |
| Source: | IJBB Vol.48(5) [October 2011]
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