Indian J.L.Sci.2(2) : 17-22, 2013 ISSN : 2277-1743 (Print) ISSN : 2278-7879 (Online) ANTI-INFLAMMATORY EFFECT AND TOXICOLOGICAL EVALUATION OF THYMOQUINONE (VOLATILE OIL OF BLACK SEED) ON ADJUVANT-INDUCED ARTHRITIS IN WISTAR RAT MEHTAB ALAMa1 AND VIKAS GALAVb
aKrish Biotech Research Pvt. Ltd., Kalyani, West Bengal, India
bUniversity College of Medical Sciences & GTBH, University of Delhi, New Delhi, India
ABSTRACT Inflammatory disorder to be considered autoimmune disease which, affects the joints and is associated with swelling, stiffness and pain. The study was subjected to evaluate therapeutic potential of thymoquinone (volatile oil of black seed) on freund's complete adjuvant induced arthritis in rats. Arthritis was induced in rats by injecting 0.1ml of freund's complete adjuvant into the left hind paw of the rat intradermally for 21 days. Thymoquinone orally administered to male and female wistar rat at dose level of 2.5, 5.0, 10.0 mg/kg body weight for 35 days repeatedly, post induced did not produce any sign of toxicity, mortality, pathological changes and significant blood parameters changes. The investigated result showed that the thymoquinone (10 mg/kgb.wt) significantly (p<0.001) inhibited the FCA induced arthritis and showed significant anti-inflammatory activity. Thymoquinone 10 mg/kgb.wt also tends to suppress the inflammation at p<0.05 level significance. Therefore, thymoquinone treatment found to possess potent anti-inflammatory activity with no toxicity and the treatment significantly inhibited the development phase of arthritis which, is further supported by its anti-inflammatory effect was comparable to that of standard drug prednisolone (5 mg/kgb.wt). KEYWORDS : Thymoquinone, Freund's adjuvant induced arthritis, Arthritis activity
Inflammation is a common clinical conditions and
for medicinal purposes in many countries (Jansen, 1981).
rheumatoid arthritis (RA) is a chronic inflammatory
This plant is one of the most extensively studied, both
autoimmune disorder that affects about 2.1 million
phytochemically and pharmacologically (Riaz et al., 1996;
(Majithia & Geraci,2007., El-Dakhakhny, 1963) in Indians
Siddiqui & Sharma, 1996). Most properties of whole seeds
and Americans etc which, affects the joints and is
or their extracts are mainly attributed to quinone
associated with swelling, stiffness and pain. The drugs
constituents, of which, thymoquinone is more abundant
commonly in used for the treatment of inflammation and
compound (F ilippo D ' A ntuono et al., 2002).
RA include glucocorticoids eg., cortisone, prednisolone
Pharmacological action of Nigella sativa has been
and NSAIDS drugs (eg. Ibuprofen), disease-modifying
i n v e s t i g a t e d i n c l u d i n g i m m u n e s t i m u l a n t ,
anti-inflammatory and anti-rheumatic drugs (DMAIDs and
antiinflammatory, anticancer, antimicrobial antiparasitic
DMARDs; eg. Methotrexate (MTX) and leflunomide) and
and antioxidant (Ibrahim Tekeoglu et al. 2007; Burits and
biological response modifiers (eg. Tumor necrosis factor-
alpha blocking agents). Such therapies are helpful
controlling the symptoms of acute RA, but their effect on
MATERIALS AND METHODS
chronic, prolong RA are unsatisfactory. Moreover, besides
Male and female albino wistar rat (Rattus
their high cost, the prolonged use of many of these
norvegicus were maintained at 22 ± 3ºc, relative humidity
is associated with severe adverse reactions and
between 60 to 70 % and a light/dark cycle of 12 hr. The rat
toxicity, including gastrointestinal disturbances and
were provided with rat pellet feed (amrut brand, pranav agro
Pune) and drinking water filtered through aquaguard water
Thymoquinone (Nigella sativa seed) is a member
filtration system ad libitum throughout the study period. All
of the ranunculaceae family growing in countries bordering
groups of rat were acclimatized 6 days prior to the start
the mediterranean sea, India, Pakistan, and Iran. For many
dosing. The thymoquinone sample was purchased from
centuries, nigella sativa seeds (also called black seeds or
sigma aldrich India and peanut oil from local market the
black cumin) have been used as a food additive as well as
dose volume maintained at 10 ml/kg body weight. 1Corresponding author ALAM AND GALAV : ANTI-INFLAMMATORY EFFECT AND TOXICOLOGICAL EVALUATION OF THYMOQUINONE . Complete Freund's Adjuvant Arthritis Organ Body Weight Ratio
After randomization male and female rats (110 ±
The vital organ such as liver, kidney, brain, heart,
20 g body weight) were divide in to six groups (I to VI) each
lung, spleen, adrenal of rats and the male sex organ(testis,
group consist 5 male and 5 female rats. On day one, all rats
epididymis, prostrate and seminal vesicle) and female sex
were injected into the sub plantar region of the left hind paw
organs (ovary, uterus, cervix and vagina) were quickly
with 0.1ml of freund's complete adjuvant. This consist of
removed and weigh individually. The organ to body weight
mycobacterium butyricum suspended in heavy paraffin oil
by thorough grinding with motor and pestle to give a
Biochemical Estimation
concentration of 6mg/ml. Dosing with the test and standard
Different biochemical parameters like Alkaline
substance was started on the first day and continued for 21
phosphatase (ALP) marker for bone destruction, Acid
Phosphatase (ACP) the lysosomal enzyme activity, Serum
Anti-inflammatory Studies
glutamate oxalo acetate transaminase (SGOT) and Serum
Based on the subacute 28 days oral toxicity in rats.
glutamate pyruvate transaminase (SGPT) were estimated
Group I served as arthritis control group and group II served
by using ALP,ACP, SGOT and SGPT kit in Erba Mannhein
as vehicle control group given a daily dose of normal saline
EM 200 Clinical Chemistry Analyser. Bood samples were
and peanut oil. The rats of group III, IV and V were given
collected by sublingual rout, centrifused and supernatant
thymoquinone mixed in peanut oil via gavage at dose level
serum was collected. Different enzyme reagents were added
2.5, 5.0, 10 mg/kg body weight respectively for 35 days
to the serum and estimated in an auto analyser.
post induced arthritis and group VI served as standard drug
Haematological Study
(prednisolone) and given 5.0mg/kg body weight. Rats were
Blood collected in EDTA tube was analyzed for
observed for the paw swelling in the injected and contra
red blood cells (RBC) and white blood cells (WBC) counts
lateral hind paws of the rats were monitored daily using
were determined according method of Winfrobe and
liquid displacement plethysmometer (Ugo Basile, Italy).
Landsberg whereas, haemoglobbin and differential
Increase in the extent of erythema and edema of the tissues
leucocytes counts (DLC) were measured according to
shows the severity of the inflammation. The difference in
severity of arthritis between the experimental groups and
Statistical Analysis
arthritis control group were statistically analyzed and
Statistical significance were presented between
toxicological effect and mortality throughout the study
control and experimental values as mean ± SEM (n=5).
period. Body weight, food and water of individual rat were
Statistical comparison of body weight changes was made
recorded weekly for each group. After 56 day treatment as
well as controls animals were sacrificed and blood
collected directly from jugular vein in ethylene diamine
tetra acetic acid (EDTA) solution and non-oxalate tubes for
Organ Body Weight Ratio
the estimation of haematological and biochemical
The absolute body weights of thymoquinone
parameter respectively. All the animals were closely
treated male and female rats no significant changes were
observed for organs like ears, nose, tail, fore paws and hind
observed while, comparable to controls rats. The relative
organ weights (organ to body weight ratio) of animals
Paw Edema
exposed to different dose of thymoquinone did not indicate
Paw volumes of left hind limb were recorded and
any significant changes and value are shown in (Table, 1). Biochemical Study
using mercury column plethysmometer. On the day 21 ,
The results of serum biochemical parameters of
rheumatoid arthritis becomes more evident and
male rats are shown. There was no change in clinic-
chemical parameters of male and female rats exposed to
Indian J.L.Sci.2(2) : 17-22, 2013 ALAM AND GALAV : ANTI-INFLAMMATORY EFFECT AND TOXICOLOGICAL EVALUATION OF THYMOQUINONE . Table 1: Relative Organ Body Weight of Male Rats Orally Administration Thymoquinone for 35 days post induced arthritis Dose (mg/kg body weight) Arthritis Standard Table 1 (continue): Relative Organ Body Weight of Female Rats Orally Administration Thymoquinone for 35 days post induced arthritis Dose (mg/kg body weight) (Arthritis Standard Control)
different dose of thymoquinone for 28 days and the values
rats. While, the gross pathological examination observed
were comparable to controls rats. A marked increase in the
slightly uterus distention in two control and one treated
activity of membrane marker enzymes ALP, AST and SGP
female rat which, spontaneous and is physiological/cycle
were observed in the serum of arthritis rats group V (Table,
nature and did not effect on outcome of study (Table, 4). Ant-inflammatory Effect Haematology
The left hind paw injected with complete freund's
The results of haematological parameters in male
adjuvant become gradually swollen and reach edits peak at
and female rats exposed to different doses thymoquinone
21st day. The results obtained for the different dose of
are shown. There was no significance changes in Hb RBC,
thymoquinone and the standard drug prednisolone 5.0
WBC and differential leukocyte count (DLT) (Table, 3).
mg/kg body weight in the complete freund's adjuvant-
Histopathology
induced (FCA) paw edema test at specific time intervals. It
Autopsy of treated animals after 56 days of
was obvious that during 21st day treatment paw edema in
exposure revealed no significance change in their vital
disease control inflamed paw is increase in time dependent
organs. Microscopic examination of liver, kidney, brain,
manner and all administration groups significantly inhibited
testes, and ovary of rats treated with the different doses of
the development of joint swelling induced by complete
thymoquinone for 28 days did not shown any significant
Freund's adjuvant. Arthritic index and rheumatoid factor
tissue damage and were comparable with those of controls
were significantly (p<0.001) decreased start on 30 days in
Indian J.L.Sci.2(2) : 17-22, 2013 ALAM AND GALAV : ANTI-INFLAMMATORY EFFECT AND TOXICOLOGICAL EVALUATION OF THYMOQUINONE . Table 2: Serum Biochemical parameter in rats treated orally with thymoquinone for 35 days post induced arthritis Dose mg/kg body weight Arthritis Standard Parameter 2.5 (Low) 5.0 (Mid) 10.0(High) Table 3: Haematological parameters in rats treated orally with thymoquinone for 35 days post induced arthritis Dose mg/kg body weight Parameter Arthritis 2.5 (Low) 5.0 (Mid) 10.0 (High) Standard Table 4: Histopathological Observation in tissue of rats treated orally with thymoquinone for 35 days post induced arthritis Number of Lesion Dose mg/kg body weight 0 (Arthritis 0 (Vehicle Standard 2.5(Low) 5.0(Mid) 10.0(High) Control) Control)
NAD= No Abnormality Detected, M= Male, F=Female
treatment with thymoquinone 10.0 mg/kg, and
inhibition of adjuvant-induced arthritis in rats is one of the
prednisolone 5.0 mg/kg treated animal as compare to
most suitable test procedures to screen anti-arthritic agents
disease control treatment (Table, 5 & Figure 1 & 2).
since, it closely resembles human arthritis. Arthritis (RA),
one of the chronic inflammatory diseases, systemic
DISCUSSION
inflammatory disorder affecting the synovial joints and
Most of the investigators have reported that
typically producing symmetrical arthritis that leads to joint
Indian J.L.Sci.2(2) : 17-22, 2013 ALAM AND GALAV : ANTI-INFLAMMATORY EFFECT AND TOXICOLOGICAL EVALUATION OF THYMOQUINONE . Table 5: Effect Of Thymoquinone Mean Percentile In Paw Edema Volumes In Male Rats Induced By Adjuvant Freund's Complete Adjuvent ( FCA) Dose (mg/kg body weight)
Value are expressed as a mean ± S.E.M (p< 0.001) as compared to control
Table 5 (continue): Effect Of Thymoquinone Mean Percentile In Paw Edema Volumes In Female Rats Induced By Adjuvant Freund's Complete Adjuvant ( FCA) Dose (mg/kg body weight)
Value are expressed as a mean ± S.E.M (p< 0.001) as compared to control
prednisolone 5.0 mg/kg when comparable to the arthritis
control and vehicle control group. Increased white blood
cell count is a common feature of inflammatory reactions,
especially those induced by microbial infection. So in
arthritic group an increase in total leukocyte number was
found. A significant reduction (p<0.001) in total leukocyte
number was found in case of treated thymoquinone 10 and
standard drug 5 mg/kg body weight. In present study it was
found that the administration of thymoquinone and standard
drug lead to inhibition leukocyte migration which, may
have beneficial effect for joint preservation. Traditional
medicine has maintained greater popularity all over
developing world prompted by the increase awareness and
interest in medicinal plant and the use is rapidly increase
Figure 1 : Mean Percentile change In Paw Edema
generation by generation (Daswaniet al., 2006; Ogbonnia
Volumes (Ml) In Male Rats Induced By FCA
et al., 2008). More often, this has led to indiscriminate use
destruction. In this present study, the result demonstrated
with out appropriate dose resulting in abuse. The incidence
the effect of thymoquinone and prednisolone on FCA
of adverse effects of these herbal remedies and sometimes
induced arthritis model in rats, selected to evaluate their
life-threatening conditions has been reported among
efficacy against the proliferateive phase of inflammation,
various ethnic groups (Elvin-Lewis, 2001; Chan, 2003).
the activity of membrane marker enzymes was
The result presently conducted study revealed that daily
significantly markedly increased in the adjuvant induced
orally administration thymoquinone (volatile of Kalonji
arthritic rats after treated with thymoquinone 10 mg/kg, and
Seed) found to exhibit significant antiinflammatory and the
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The author are grateful to the Director Lifescience
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