anthocyanin rich extract from red cabbage…ranjitsinh devkar division of phytotherapeutics and...
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Anthocyanin rich extract from Red cabbage
(Brassica oleracea) reduces oxidative stress and
prevents apoptosis in stressed rat cardiomyocytes.
RANJITSINH DEVKAR
Division of Phytotherapeutics and Metabolic Endocrinology, Department of Zoology, Faculty of Science,
The M.S. University of Baroda, Vadodara – 390002, Gujarat, INDIA
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Live mint oct 2015 e-paper
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……. Anthocyanins…..not only have
imperative role in plants but are
extensively researched for their
protective role against a myriad of
human diseases.
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ANTHOCYANIN RICH RED CABBAGE (Brassica oleracea) extract (ARCE)
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Long-term consumption anthocyanins makes the heart more resistant to myocardial infarction due to increased myocardial glutathione levels (Toufektsian et al., 2008) J.Nutrition.
Certain anthocyanins can act as electron acceptors at complex I of mitochondria and bypass ischemia and regulate energy metabolism in mammalian cells (Skemiene et al, 2015) FEBS Journal.
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Preparation and characterization of ARCE
Safety evaluation
Cytotoxicity Assay
Cardioprotective potential of ARCE
Studies with stressed rat cardiomyocytes
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• Shredded and dried at 50 deg.
•Extraction with Methanol: Water : HCL (50:50:1) solvent system
•Evaporated till dryness in rotatory evaporator at 40̊C
ANTHOCYANIN RICH RED CABBAGE EXTRACT (ARCE)
Anthocyanin Rich red Cabbage Extract (ARCE)
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A. TLC chromatogram of Anthocyanin rich extract of Red Cabbage. B. 3D densitogram of HPTLC measured at 530 nm in CAMAG Linomat5. First three lanes are of extract dissolved in methanol and remaining three lanes are of extract dissolved in acidified methanol.
A. B.
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HPLC fingerprinting of ARCE.
15
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HPLC fingerprinting of ARCE.
16
Concentration of monomeric anthocyanin in ARCE
considering molar extinction coefficient of Cyanidin -3,5-
diglucoside was 86.375 ± 3.138
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Anthocyanins present in functional foods is member of flavonoid family are
glycosylated poly-hydroxyl and poly-methoxy derivatives of flavinium salts.
The anti-oxidant property of anthocyanin is particularly from the hydroxyl moieties of
the c-ring.
Natural electron deficiency of anthocyanins makes it reactive towards oxygen radicals.
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Acute oral toxicity in mice •Limit test procedure as per the OECD test guidelines. Experimental protocol
was executed according to CPCSEA India guidelines and approved by the animal
ethical committee of the Department of Zoology, The M.S. University of Baroda,
Vadodara (Approval No.827/ac/04/CPCSEA)
•Thirty two Swiss albino mice of either sex were divided into four
groups (n=8) and were orally administered with a single dose of
1000, 2000, 3000, 4000 or 5000 mg/kg body weight of ARCE
extract.
•Animals were observed for possible behavioral changes such as
Tremors
Convulsions
Sleep
Altered feeding
Salivation
Diarrhoea till 72 hr post treatment
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Acute toxicity studies
•No mortality was recorded in acute toxicity study
with ARCE extract up to a dose of 5000mg/kg
body weight till 72 h.
•No abnormalities in behavior could be monitored
on extract administration .
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Sub chronic oral toxicity in mice
•The sub chronic oral toxicity study was conducted according to OECD Test 407
(OECD, 1995). Experimental protocol was executed according to CPCSEA India
guidelines and approved by the animal ethical committee of the Department of
Zoology, The M.S. University of Baroda, Vadodara (Approval
No.827/ac/04/CPCSEA)
•Thirty two Swiss albino mice of either sex were divided into four
groups (n=8) and maintained for 28 days for this experiment.
•Group I was orally fed with carboxy methyl cellulose (CMC; 0.5 %)
that served as control whereas, Groups 2, 3 and 4 were orally
administered with 1000, 2000 and 3000 mg/kg of ARCE extract
respectively.
•After 28 days of treatment, blood was collected from overnight
fasted mice. 20
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LD50 of ARCE extract
•Since no mortality was recorded even after administration of
5000mg/kg of ARCE extract the LD50 of ARCE extract could
not be established.
•The present observations indicates that, the LD50 of ARCE
extract is likely to be higher than 5000mg/kg BW.
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Subchronic administration of ARCE in Swiss albino mice and plasma metabolic
indices
Results are expressed as Mean ± S.E.M for n=8. *p<0.05 compared to CON. 22 Results are expressed as Mean ± S.E.M for n=8. *p<0.05 compared to CON.
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Subchronic (28 days) administration of ARCE on plasma markers of cardiac and
renal function in Swiss albino mice.
Results are expressed as Mean ± S.E.M for n=8. *p<0.05 compared to CON. 23
Results are expressed as Mean ± S.E.M for n=8. *p<0.05 compared to CON.
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Subchronic administration of ARCE on plasma indices of hepatic function in Swiss
albino mice.
Results are expressed as Mean ± S.E.M for n=8. *p<0.05 compared to CON. 24
Results are expressed as Mean ± S.E.M for n=8. *p<0.05 compared to CON.
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Subchronic administration of ARCE
extract on bodyweight, food and fluid
intake of Swiss albino mice
Results are expressed as Mean ± S.E.M for n=8. *p<0.05 compared to CON.
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Photomicrographs of Heart,
liver and kidney of control (1)
and 1000, 2000 and 3000mg/kg
ARCE treated mice (2, 3, 4)
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• Significant reduction in bodyweight gain, food intake, red blood
cell count and hemoglobin content along with higher alkaline
phosphatase, billirubin and urea levels were observed in mice treated
with 3000 mg/kg bodyweight after 28 days.
•NOAEL of the ARCE extract was found to be 2000mg/kg BW.
Hence, consumption of ARCE extract for various medicinal purposes
is safe.
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• Significant reduction in bodyweight gain, food intake, red blood
cell count and hemoglobin content along with higher alkaline
phosphatase, billirubin and urea levels were observed in mice treated
with 3000 mg/kg bodyweight after 28 days.
•Since, there was no mortality up to a dose of 5000 mg/kg
bodyweight, 50% lethal dose (LD50) could not be determined and
hence, it can be assumed that, LD50 of ARCE extract is > 5000mg/kg.
•NOAEL of the ARCE extract was found to be 2000mg/kg BW.
Hence, consumption of ARCE extract for various medicinal purposes
is safe.
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•Male Sprague Dawley rats weighing 300 ± 20 (Obtained from
Sun pharmaceutical advanced research centre, Vadodara, India .
•Experimental protocol was executed according to CPCSEA India
guidelines and approved by the animal ethical committee of the
Department of Zoology, The M.S. University of Baroda, Vadodara
(Approval No.827/ac/04/CPCSEA)
Assessment of anti-atherosclerotic and
cardioprotective potentials
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A total of thirty two rats were divided into 4 groups of 8
animals each.
•Group I served as control (CON) and was fed with standard
laboratory chow and orally administered with 0.5 % CMC for 8
weeks.
•Group II (ATH)
as per Cai et al., 2005 – Briefly, Vit D3 + HCD.
•Group III (ATH+ARCE) was orally administered with 100 mg/kg
while, group II received equal volume of vehicle (0.5% carboxy
methyl cellulose).
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Plasma lipid profile
Results are expressed as Mean±S.E.M, for n=8. Where, ###P<0.001 compared with CON (rats fed with laboratory chow), **P<0.01 and ***P<0.001compared with ATH (rats fed with high cholesterol diet). 31
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32 Results are expressed as Mean ± S.E.M, for n=8. Where, # P < 0.05, ##P<0.01, ###P<0.001 and ns non significant compared with CON (rats fed with laboratory chow),*P < 0.05, **P<0.01 and ***P<0.001 compared with ATH (rats fed with atherogenic diet).
Fecal lipid profile
Fecal bile acid contents
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Thoracic aorta of control, ATH, ATH+ARCE rats stained with HXE.
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Thoracic aorta of control, ATH, ATH+ARCE stained with von kossa
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Thoracic aorta of control, ATH, ATH+ARCE stained with Weigert’s stain.
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Photomicrographs of heart of control (A), HCD (B) and
HCD+ARCE (C) rats stained with hematoxyline and eosin
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Effect of ARCE on cardiac and hepatic lipid profile.
Results are expressed as Mean±S.E.M, for n=8. Where, # P < 0.05, ##P<0.01 and ###P<0.001 compared with CON (rats fed with laboratory chow),*P < 0.05, **P<0.01, ***P<0.001 and ns non significant compared with HCD (rats fed with high cholesterol diet).
37
Markers of cardiac damage.
Cardiac lipid profile
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ARCE supplementation resulted in significant prevention of
atheromatous plaque formation, calcium deposition and
elastin derangements.
38
Possibly high content of cyanidin class of anthocyanins eg.
cyanidin-3-glucoside.
ARCE was able to prevent HCD induced depletion in the
cardiac antioxidants and related damages.
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•ARCE supplementation resulted in significant prevention of
atheromatous plaque formation, calcium deposition and
elastin derangements.
•These results are attributable to improved lipid profiles of
ATH+extract treated experimental groups wherein, fecal
elimination in form of CA and DCA was recorded.
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H2O2
Anthocyanin rich Red Cabbage extract
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Cell viability
Intracellular ROS
Lipid Peroxidation
DNA damage
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###
ARCE µg/ml - - + + + + + +
- + + + + + + + H2O2
100 µM/ml
***
### ###
###
### ###
% C
ell V
iab
ility
Control H2O2 ARCE+H2O2
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RHODAMINE
CONTROL
ARCE
H2O2+ARCE
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CTCF: Corrected total cell fluorescence
CONTROL
ARCE
H2O2+ARCE
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CONTROL
ARCE
H2O2+ARCE
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CONTROL
ARCE
H2O2+ARCE ***
###
CO
NT
RO
L
H2O
2
AR
CE
+ H
2O
2
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CONTROL ARCE+H2O2
ARCE H2O2
16.4%
76.4% 76.3%
19.1%
12.3%
85.2% 25.7%
57.3%
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CONTROL ARCE+H2O2
ARCE H2O2
16.4%
76.4% 76.3%
19.1%
12.3%
85.2% 25.7%
57.3%
CONTROL ARCE+H2O2
ARCE H2O2
16.4%
76.4% 76.3%
19.1%
12.3%
85.2% 25.7%
57.3%
ARCE down-regulates apoptosis
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201 bp
CO
NT
RO
L
AR
CE
H2O
2
AR
CE
+ H
2O
2
**
## *
CO
NT
RO
L
AR
CE
H2O
2
AR
CE
+ H
2O
2
*
#
114 bp
ARCE prevents depletion of intracellular antioxidants
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CO
NT
RO
L
AR
CE
H2O
2
AR
CE
+ H
2O
2
** * #
192 bp
CO
NT
RO
L
AR
CE
H2O
2
AR
CE
+ H
2O
2
168 bp
ARCE down-regulates apoptosis
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CO
NT
RO
L
AR
CE
H2O
2
AR
CE
+ H
2O
2
**
#
177 bp
ARCE prevents down-regulation of CAV3
Cav-3, the muscle-specific isoform, mediates interactions with cytoskeletal elements and is responsible for caveolae formation in cardiac cells. Cardiac Cav-3 expression has been reported to decrease in cases of myocardial infarction , cardiac hypertrophy , heart failure, and chronic hypoxia .
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In a Nutshell
•Functional foods draw considerable interest due to their
effectiveness against a myriad of human diseases and hence,
anthocyanins and their therapeutic potentials continue to fascinate
the research fraternity.
•Hence, novel sources of anthocyanins are subjected to scientific
scrutiny through innovative research models and protocols to seek
answers pertaining to their therapeutic targets in metabolic
pathways.
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