452194
2012
TAR641753465812452194A Horani, D ShoseyovTherapeutic Advances in Respiratory Disease
Therapeutic Advances in Respiratory Disease
Original Research
Triphala (PADMA) extract alleviates
bronchial hyperreactivity in a mouse
model through liver and spleen
immune modulation and increased
anti-oxidative effects
Ther Adv Respir Dis
(2012) 6(4) 199–210
DOI: 10.1177/
1753465812452194
© The Author(s), 2012.
Reprints and permissions:
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Amjad Horani, David Shoseyov, Isaac Ginsburg, Rufayda Mruwat, Sarit Doron
Johnny Amer and Rifaat Safadi
Abstract:
Objectives: Triphala (TRP), a herbal extract from Tibetan medicine, has been shown to
affect lymphocytes and natural killer T (NKT) cell function. We hypothesize that TRP could
ameliorate bronchial hyperreactivity through immune-cell modulations.
Methods: Asthma mouse models were generated through intraperitoneal (IP) injections
of ovalbumin (OVA)/2 weeks followed by repeated intranasal OVA challenges. Mice were
then treated with normal saline (OVA/NS) or Triphala (OVA/TRP). Data were compared
with mice treated with inhaled budesonide. All groups were assessed for allergen-induced
hyperreactivity; lymphocytes from lungs, livers and spleens were analyzed for OVA-induced
proliferation and their alterations were determined by flow cytometry. Oxidative reactivity
using chemiluminescence, serum anti-OVA antibodies level and lung histology were assessed.
Results: Both TRP and budesonide significantly ameliorated functional and histological
OVA-induced bronchial hyperreactivity. TRP had no effect on serum anti-OVA antibodies as
compared with decreased levels following budesonide treatment. Furthermore, a significant
increase in lung and spleen CD4 counts and a decrease in the liver were noted after TRP
treatments. Bronchoalveolar fluid from TRP-treated animals but not from the budesonidetreated animals showed anti-oxidative effects.
Conclusion: TRP and budesonide caused a significant decrease in bronchial reactivity. TRP
treatment altered immune-cell distributions and showed anti-oxidative properties. These
findings suggest that immune-cell modulation with TRP can ameliorate lung injury.
Keywords: anti-oxidants, asthma, liver, lymphocytes, spleen
Introduction
The inflammatory process in asthma is mainly
dominated by a Th-2 polarized cytokine profile
[Busse and Lemanske, 2001; Cohn et al. 2004;
Maddox and Schwartz, 2002; Grunig et al. 1998;
Wills-Karp et al. 1998]. These inflammatory cells
are detected in the bronchoalveolar lavage (BAL)
of virtually all patients with asthma [Robinson
et al. 1992] and are thought to play a pivotal role
in bronchial hyperreactivity. The current paradigm of asthma is of imbalance between Th-1 and
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Th-2 immune response, promoting increased
inflammation in the airways which in turn causes
increased airway hyperreactivity [Robinson et al.
1992; Kim et al. 2010]. Treatment aimed at
reducing inflammation of the airways reduced airway hyperreactivity [Kim et al. 2010]. Moreover,
recently natural killer T (NKT) cells were increasingly implicated in the pathogenesis of different
disease processes [Yu and Porcelli, 2005], including bronchial asthma [Lisbonne et al. 2003;
Akbari et al. 2003, 2006]. However, there is still
Correspondence to:
Johnny Amer, PhD
Liver and Gastroenterology
Units, Division of Medicine
Hadassah University
Hospital, P.O. Box 12000,
IL-91120 Jerusalem, Israel
johnnyamer@hotmail.com
Amjad Horani
Division of Allergy,
Immunology and
Pulmonary Medicine,
Washington University in
Saint Louis, Saint Louis,
MO, USA and Department
of Pediatrics, HadassahHebrew University Medical
Center, Jerusalem, Israel
David Shoseyov
Department of Pediatrics,
Hadassah-Hebrew
University Medical Center,
Jerusalem, Israel
Isaac Ginsburg
The Institute of Dental
Research, The Hebrew
University-Hadassah
Faculty of Dental Medicine,
Jerusalem, Israel
Rufayda Mruwat
Department of
Biochemistry, The
Faculty of Medicine,
The Hebrew UniversityHadassah Medical School,
Jerusalem, Israel
Sarit Doron
The Liver Unit, Division
of Medicine, HadassahHebrew University Medical
Center, Jerusalem, Israel
Rifaat Safadi
The Liver Unit, Division
of Medicine, HadassahHebrew University Medical
Center, Jerusalem, Israel
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Therapeutic Advances in Respiratory Disease 6 (4)
controversy concerning the exact role of NKT
cells in the pathogenesis of asthma.
Padma Hepaten is a formula derived from traditional Tibetan medicine [Tasduq et al. 2005,
2006; Naik et al. 2005] produced by Padma Inc.
according to good manufacturing practice in
Switzerland. It is a mixture of the medicinal
plants Terminalia chebula, Embica officinalis and
Terminalia belerica. This herbal mixture is rich in
polyphenols, tannic acid and flavonoids. An
important property of these three fruit preparations is its ability to scavenge reactive oxygen species [Ginsburg et al. 1999; Suter and Richter,
2000]. A similar formula of an equal proportional
mixture is also known as Triphala (TRP), also
recognized as Padma-Liver, P-Liver or Padma28. These formulas have shown promising results
in studies in atherosclerosis [Gieldanowski et al.
1992] as well as antiviral, antibacterial, antiallergic, antimutagenic activities [Srikumar et al.
2006] and have radioprotective properties [Jagetia
et al. 2002].
TRP’s mechanism of action is still poorly understood but it is in part attributed to its anti-oxidant properties [Ginsburg et al. 1999; Suter and
Richter, 2000]. TRP has a specific influence on
interferon-γ pathways [Neurauter et al. 2004]
and alters the distribution of different lymphocyte subsets and decrease the number of NKT
cells in the liver, in a murine model of hepatic
fibrosis [Ginsburg et al. 2009]. These changes
were associated with a significant amelioration
of hepatic fibrogenesis and were not attributed
to TRP’s antioxidant properties. Nevertheless,
recent reports have suggested that TRP can affect
lymphocyte distribution and ameliorate inflammation in a hepatic fibrosis model regardless of
its anti-oxidant properties [Ginsburg et al. 2009].
Therefore, the pattern of change in the lymphocyte distribution in the liver, spleen and lungs in
an ovalbumin (OVA) model of lung injury can be
better understood through the effects of TRP. We
aimed in this study to determine the effect of
TRP treatment on OVA-induced lung injury, in a
murine model mimicking asthma [Horani et al.
2011].
Materials and methods
Animals
The study was approved by the animal ethics
committee of the Hebrew University-Hadassah
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Medical School. Male Balb/c mice, age 8–10
weeks, purchased and housed in a barrier facility
and received care according to the National
Institutes of Health guidelines. Animals were
sacrificed 24 hours after the last administration
of antigen. At the time of sacrifice, mice were
weighed and anesthetized through the intraperitoneal (IP) injection of 0.1 ml of ketamine:
xylazine:acepromazine (4:1:1) per 30 g of body
weight.
Animal model of experimental
allergic bronchitis
Experimental allergic bronchitis mimicking asthma
was induced by IP injection of 10 µg OVA (Grade
III; Sigma-Aldrich) in 3 mg aluminum hydroxide
(Al(OH)3) on days 0, 7 and 14. Animals were thereafter challenged with intranasal instillation of
OVA 100 µg in 50 µl saline, three times a week for
4 weeks starting on day 14 [Horani et al. 2011].
Experimental design
Following the OVA induction of asthma in three
groups (10 animals each), mice were treated with
IP injections of TRP. A naïve group receiving IP
injections of saline served as healthy controls. The
naïve group served as a negative control. Animals
in this group were age matched with the other
experimental groups and were housed in the same
facility. These animals served as a quality control
group to allow for controlling for changes that are
not necessarily due to the treatments used. Data
collected were compared with those from a fourth
group that was treated with inhaled budesonide.
Treatments
Saline or TRP treatments were given every other
day; starting on day 14, after asthma was induced.
TRP was administered IP in a dose of 2 mg suspended in 200 µl normal saline, per animal.
Budesonide treatment was administered at a dose
of 2 mg/5 ml/cage and administered using an
inhaler directly to a sealed caged.
Bronchial allergen challenge assessment
Bronchial reaction to allergen inhalation was
performed under continuous airflow conditions
using a noninvasive method as described previously [Horani et al. 2011; Hamelmann et al.
1997; Lomask, 2006]. Briefly, bronchial allergen
challenge assessment was performed after the
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A Horani, D Shoseyov et al.
last allergen challenge. Mice were placed in a
whole-body plethysmograph connected to a
pneumotach, which was connected to a 10 ml
bottle at its other end. The pneumotach was
connected to a pre-amplifier. Analog signals
from the amplifier were converted to digital signals by an AD card. Software (System XA,
model SFT 1810, Buxco Electronics) was used
to analyze 10 breath signals and calculate the
plethysmographic enhanced pause (Penh) value.
The Penh value is a unitless indicator of changes
in airway resistance that correlates with specific
airway resistance. It reflects the time of pressure
decay to 36% of total box pressure during expiration. The Penh value was calculated before
and 5 min after allergen challenge. Airway hyperresponsiveness was expressed as the percentage
change of the Penh value. The Penh value was
used as a noninvasive screening method to assess
for changes in airway hyperresponsiveness in the
studied animals.
Lymphocyte isolation from the liver and
lung and splenocyte
All samples were isolated using the same protocols as described previously [Horani et al. 2011;
Safadi et al. 2004]. Cells were counted and
adjusted to 2 × 107/ml in staining buffer (in saline
containing 1% bovine serum albumin [BSA]). In
brief, spleens were harvested at the time of sacrifice and fractionated through a 70-µm nylon cell
strainer. Red blood cells were lysed by the addition of lysis buffer containing NH4CL, KHCO3
and Na-EDTA. Splenocytes were washed, suspended in RPMI 1640 medium and stored at
4°C until fluorescence-activated cell sorting
(FACS) analysis. Livers and lungs were homogenized and incubated at 37°C for 30 min. Next,
the digested liver or lung cell suspension was
centrifuged to remove parenchymal cells and cell
clumps. The supernatant was then centrifuged to
obtain a pellet of cells depleted of parenchymal
cells to a final volume of 1 ml. Lymphocytes were
then isolated from this cell suspension by 24%
metrizamide gradient cell separation.
Lung histology
Lungs were removed during sacrifice, and fixed
by careful injection of paraformaldehyde into the
main bronchus at a pressure of 20 cm H2O. This
allows for even inflation of the lung without undue
distortion of the architecture. The middle third
was embedded in paraffin and histology slides
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were obtained randomly by longitudinal cut into
three sections. Slides were stained with hematoxylin and eosin (H&E). The sections were reviewed
by an experienced pathologist who was blind to
the treatment groups.
Serum alanine aminotransferase
Blood samples were collected from the inferior
vena cava and alanine aminotransferase (ALT)
was measured using an automated enzymatic
assay with the Vistros Chemistry Systems 950.
Flow cytometry
Lymphocytes were analyzed by fluorescence-activated cell sorter (FACScalibur, Becton Dickinson,
Immunofluorometry systems, Mountain View,
CA). Cells were passed at a rate of about 1000
per second, using saline as the sheath fluid. A
488 nm argon laser beam was used for excitation.
Lymphocytes were identified and gated based on
their size (forward light scatter [FSC]) and granularity (side light scatter [SSC]) and by staining
with antibodies to CD45 specific for white
blood cells (WBCs). Lymphocytes were stained
with monoclonal antimouse CD4-FITC and
CD8-PE and were detected by the FL-1 PMT
and FL-2 PMT, respectively using log amplification. Natural killer (NK) cells were identified by
staining with NK1.1 monoclonal antibody. For
every assay, unstained cells, and anti-mouse-IgG
negative controls were used. CD4, CD8, NK and
NKT cell markers were chosen as general immune
regulatory cell markers that are likely to change
in response to increased inflammation, and to
whether a Th-1 or Th-2 profile is dominant. These
markers were used in conjunction with changes in
immune globulin levels as well as lymphocyte proliferation potential to give an overview of the level
of inflammation [Horani et al. 2011]. Instrument
calibration and settings were performed using
CaliBRITETM-3 beads (Becton Dickinson). The
percentage of each antibody-attached cell population from the entire population of pan-leukocytes
(CD45+) was calculated by the FACS-equipped
CellQuest® software. NKT cells were identified
by analyzing CD8/NK cells as well CD4/NK cells.
T-cell proliferation
Splenocytes were cultured in RPMI 1640
medium in the presence or absence followed by
pulse with 1 µCi 3H-thymidine as described earlier [Horani et al. 2011]. T-cell proliferation post
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Therapeutic Advances in Respiratory Disease 6 (4)
OVA stimulation was divided by that obtained
from nonstimulated lymphocytes. The increased
value was used to calculate the percentage of
proliferation reduction post feeding [Safadi et al.
2005].
Anti-OVA serum antibody levels
Serum was separated from blood collected at the
time of sacrifice and was evaluated for anti-OVA
antibodies by enzyme-linked immunosorbent
assay (ELISA) as described previously [Horani
et al. 2011; Safadi et al. 2005].
Measurements of anti-oxidant capacities
by a chemiluminescence-inducing
cocktail
A Luminol-dependent chemiluminescence
(LDCL) assay [Ginsburg et al. 2004a, 2004b]
was employed to measure the oxidant scavenging
abilities of whole mouse blood and of lavage samples. Samples were added to 800 µl of Hanks’ balanced salt solution which interacted with a flux of
oxidants generated by a cocktail composed of
Luminol (10 µM), glucose oxidase (GO) from
Aspergillus niger (1.46 units), as a source of H2O2,
2 mM sodium selenite (IV) (a source of electrons)
and 10 µM of Cobalt (II). This cocktail generates
a constant flux of H2O2 and of hydroxyl radical
and a steep peak of LDCL. We mixed 10 µl BAL
and 10 µl of plasma with the cocktail, vortexed
briefly and the degree of light quenching was
monitored for several minutes. Light generation,
which persisted for about 10 min at a high steady
level, was measured in a LUMAC type 2500
luminometer attached to a PC computer
(Landgraaf, the Netherlands). This assay measures the ability of the anti-oxidants to quench
luminescence generated by the oxidants from the
cocktail.
Statistical analysis
The FACS and aminotransferase results levels
were analyzed with analysis of variance (ANOVA)
and Student’s t-test. An ANOVA with Dunnett’s
test for multiple comparisons was used to determine the statistical significance of differences
from the values obtained for nonsensitized animals after OVA challenges. A two-way ANOVA
was used with Tukey’s multiple range tests to
determine the statistical significance of differences among strains after OVA challenges.
202
Figure 1. Airway reactivity expressed as the
percentage change of Penh. Airway reactivity was
evaluated as the percentage change of Penh (± SE)
using a whole-body plethysmograph. Both TRP and
budesonide treatments significantly decreased the
percentage change of Penh. The TRP effect was more
prominent than budesonide (p = 0.03).
Results
Treatment with TRP, following asthma
induction, significantly decreased the
percentage change of Penh (enhanced
pause)
Airway hyperreactivity was measured using a
whole-body plethysmograph and expressed as the
percentage change of Penh ± SEM (Figure 1).
Penh was –1.38 ± 1.3% in the naïve state and significantly increased to 16.86 ± 4.1% (p = 0.0005)
following asthma induction that was treated by
normal saline. Treatment with IP TRP significantly decreased the change of Penh to –2.59 ±
1.9% (p = 0.001) and to 5.26 ± 3.1% (p = 0.025)
with budesonide. The Penh score of the treatment
group was not significantly different from the
naïve group (p = 0.29). The improvement seen
after treatment with TRP was even better than
that seen after treatment with inhaled budesonide
(p = 0.032). Animals treated with IP TRP showed
no obvious differences in behavior or weight as
compared with the other treatment groups.
TRP-attenuated lung inflammation
OVA-induced lung injury was associated with
abundant inflammatory infiltrations, as evident
in the H&E-stained lung sections (Figure 2).
Prominent peribronchial and perivascular infiltrations were seen after OVA-induced lung
injury (Figure 2b) as compared with the naïve
group (Figure 2a). The inflammatory infiltrations were clearly attenuated by treatment with
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A Horani, D Shoseyov et al.
Figure 2. Hematoxylin and eosin (H&E) stain of lung tissue. The middle third of the lung section was
embedded in paraffin and histology slides were obtained randomly by longitudinal cutting into three. Slides
were stained with H&E. Following staining, ×20 images were acquired. Compared with the naïve group (a),
prominent perivascular and peribronchial infiltration are seen in ovalbumin (OVA)-induced asthma (b). These
infiltrations were attenuated in the budesonide (c) and in the Triphala (TRP) (d) groups.
The effect of TRP in modulating OVAinduced lung injury was not mediated
through a humoral response
Semiquantitative ELISA was performed to study
the serum level of anti-OVA antibodies at different
dilutions. Arbitrary primary ELISA optical density (OD) readings were used to assess anti-OVA
titers in a semiquantitative manner (Figure 3).
with the naïve group. Treatment of OVA-induced
animals with TRP had no effect on the high
serum anti-OVA titers, which remained high,
similar to the untreated group (1.459 ± 0.06,
p = 0.16) and significantly higher than the levels
in sera from the naïve group (p < 0.0001).
Treatment of OVA-induced animals with budesonide, as expected, caused a significant decrease
in the anti-OVA titer to 0.693 ± 0.11 OD. This
observed level was similar to that observed in
non-OVA-induced naïve animals (p = 0.12) suggesting an efficient humoral suppression of antiOVA antibodies production.
Serum anti-OVA titers at the 1:5000 dilutions
were 0.512 ± 0.06 OD in the presence of naïve
untreated serum. Anti-OVA serum titers rose
significantly (p < 0.0001) to 1.376 ± 0.04 in the
untreated OVA-induced group when compared
TRP did not suppress T-cell proliferation
We reported earlier no budesonide effect on T-cell
proliferation derived splenocytes in the OVAinduced lung injury [Horani et al. 2011]. In order
IP TRP (Figure 2c) which was comparable to
that seen after treatment with inhaled budesonide
(Figure 2d).
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Therapeutic Advances in Respiratory Disease 6 (4)
Figure 3. Semiquantitative enzyme-linked
immunosorbent assay (ELISA) analysis of antiovalbumin (OVA) antibodies. Serum anti-OVA titers
were measured by ELISA using arbitrary OD units and
presented with means ± standard error. Increased
serum anti-OVA titers, expressed as increased OD
readings, express successful induction of asthma
in this model. A significant fall in serum anti-OVA
levels was achieved by the budesonide treatment
as compared with the untreated group (p = 0.0002).
The beneficial effect of Triphala (TRP) did not affect
production of anti-OVA antibodies when compared
with the untreated OVA group.
to study the effect of TRP on the cellular response,
T-cell proliferation was measured in splenocytes
before and after TRP treatment (Figure 4). Spleen
T cells from all study groups showed low and similar proliferative profiles when cultured in medium
only (Figure 4, right panel). T-cell proliferation
cultured in medium was 239.25 ± 39.6 counts per
minute (cpm) in naïves, 249 ± 20.3 cpm in
asthma-induced animals and 257 ± 60.2 cpm in
the TRP-treated animals. Specific stimulation
with OVA increased proliferation in both asthmatic groups but not in the cells from the naïve
group (Figure 4, left panel). T-cell proliferation
following OVA stimulation was 220 ± 23 cpm in
naïves which increased to 297.5 ± 34.7 cpm in
untreated asthma (p = 0.04) and 444.5 ± 113.8
cpm in the TRP-treated group (p = 0.02), respectively. Although TRP caused increased proliferation of lymphocytes compared with the untreated
OVA group, this increase was not statistically
significant.
TRP affected immune cell distribution
FACS was performed on splenocytes as well as
isolated liver and lungs lymphocytes of the different study groups. We previously reported that
treatment with budesonide had no significant
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Figure 4. T-cell proliferation post ovalbumin (OVA)
stimulation. Spleen T cells from all groups showed
low and almost similar proliferative profiles when
cultured in medium only (right panel). Specific
stimulation with OVA, however, caused significant
increased proliferation in all cells originally
coming from OVA-treated donors but not from
naïve group (left panel). Triphala (TRP) treatment
caused a nonsignificant trend of increase in T-cell
proliferation compared with budesonide (p = 0.13).
changes on lung, liver or spleen NKT cells when
compared with an untreated OVA-induced asthma
group. Similarly, budesonide treatment did not
cause significant change in CD4+ cell counts in
either the lung or liver compared with an untreated
OVA-induced asthma group. Spleen CD4 cell
count, however, increased significantly after
budesonide treatment [Horani et al. 2011]. We
only show here the result of TRP therapy. The
results of the different lymphocyte subsets are
presented as the percentage of all CD45+ cells ±
SEM (Figure 5).
There was no significant change in NKT levels
in the lung (NK+CD3+) following asthma
induction in either treated or untreated groups.
Furthermore, we did not find a significant
change in spleen NKT cell numbers after asthma
induction. No significant differences were seen
among the different OVA treatment groups.
Liver NKT cells, showed a decrease in NKT cell
numbers after OVA induction, yet this change
barely reached significance. Liver NKT cell numbers were 1.65 ± 0.42% in the naïve study group,
which decreased to 1.02 ± 0.12% and 0.87 ±
0.15% in the nontreated OVA and TRP-treated
group (p = 0.14 and p = 0.07, respectively).
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A Horani, D Shoseyov et al.
Figure 5. Flow cytometry analysis of liver, spleen and lung lymphocytes. Isolated lymphocytes from each
organ were stained as described in the methods section. Triphala (TRP) treatment caused a significant
increase in lung CD4 counts paralleling a significant decrease in the liver. Furthermore, TRP treatment caused
a decrease in lung CD8 cells.
When studying NK cell numbers, we only
found significant changes in spleen NK cell
numbers (NK+ CD3-). Following OVA induction, spleen NK cells increased from 2.32 ±
0.55% in naïve animals to 5.83 ± 1.7% after
OVA induction (p = 0.02). Yet, there was no significant difference between the untreated and
treated groups (p = 0.3).
When studying lung CD4+ cells distribution, we
noticed a decrease in CD4+ cell numbers following OVA induction as compared with naïve nontreated animals (10.67 ± 1.93% to 6.39 ± 1.06%,
p = 0.07). TRP treatment on the other hand
caused a significant increase in CD4 cell numbers
to 15.66 ± 3.58% (p = 0.1 and p = 0.03 when
compared with naïves and the nontreated OVA
group, respectively).
Spleen CD4+ cells showed a similar trend to that
seen in the lungs, such that CD4+ numbers significantly decreased following OVA induction and
increased following treatment with TRP. CD4 cell
numbers were 2.48 ± 0.41% in the naïve group as
compared with 0.96 ± 0.29% in the untreated
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asthma group (p = 0.01) and 2.76 ± 0.91% in the
TRP-treated group (p = 0.4 and p = 0.07 when
compared with the naïve and OVA groups,
respectively).
Following OVA induction, liver CD4+ cells
increased from 14.66 ± 3.36% as seen in the naïve
group to 20.12 ± 2.74% in the untreated asthma
group, but this increase did not reach statistical
significance (p = 0.17). TRP treatment on the
other hand, caused a significant decrease in CD4+
cell numbers to 7.5 ± 1.49% (p = 0.05 and p =
0.04 compared with the naïve and OVA nontreated groups, respectively).
Examining CD8+ cell distribution, we noted no
significant change in lung CD8+ numbers after
OVA induction (6.5 ± 1.97% in naïve group and
6.7 ± 1.78% in the OVA untreated group, p =
0.4). TRP treatment, on the other hand, caused a
significant decrease in lung CD8+ cells to 2.28 ±
0.3% (p = 0.04 and p = 0.01 when comparing
naïve and TRP treatment groups and OVA
untreated and TRP treatment groups, respectively). Unlike the lungs, OVA induction caused a
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Therapeutic Advances in Respiratory Disease 6 (4)
Figure 6. Serum alanine aminotransferase (ALT)
levels determination. Serum ALT levels increased
significantly after asthma induction (p = 0.004).
significant decrease in liver CD8+ numbers from
8.95 ± 1.76% in the naïve group to 6.1 ± 0.17%
and 3.01 ± 0.65% in the untreated and TRPtreated groups (p = 0.04 and p = 0.008, respectively). There was no significant difference in liver
CD8+ cells between the OVA-induced groups.
No significant changes were seen in CD8+ cells
numbers in the spleen.
In summary, TRP treatment caused a significant
increase in lung CD4 numbers paralleling a significant decrease in the liver. Furthermore, TRP
treatment caused a decrease in lung CD8 cells.
These data might suggest that TRP had an effect
on the lungs through an effect on lymphocyte
distribution.
OVA induction caused increased ALT
levels
We also investigated liver injury reflected by levels
of serum ALT, as a screening tool for liver involvement in our model. Serum ALT levels, increased
from 22.96 ± 1 IU/ml in naïves to 69.68 ± 14.5 IU/
ml in the OVA-induced asthma mice and 90.03 ±
45.9 IU/ml in the TRP treatment group (p = 0.004
and p = 0.07, respectively). There was no significant difference between the untreated asthma
groups and the TRP-treated group (Figure 6).
TRP had affect on the BAL but not on
blood anti-oxidant activity
The anti-oxidant capacity of blood and of lung
lavage was assessed using the LDCL assay (as
described in the methods section). The intensity
of light readings are presented as mean values and
standard error (Figure 7). The intensity of luminescence correlated linearly with the generation
of radicals, and anti-oxidants therefore resulted in
206
a decline of radicals and decreased intensity of
luminescence. The intensity of light, generated by
the GO cocktail alone (not shown), was at a
constant level of approximately 252,000 cpm.
BAL obtained from all animal groups (Figure 7a)
showed a maintained increase of anti-oxidant
activity as compared with naïve animals. This
anti-oxidant activity became significant (p < 0.04)
in the TRP treatment group compared with
the control OVA-induced asthma starting at 360
seconds. There were no significant differences in
between other groups up to 540 seconds of in
vitro follow up. After 60 seconds, blood samples
from all groups (Figure 7b) achieved a similar
peak of anti-oxidant activity (250,000 arbitrary
units) as compared with the lavage samples.
However, serum anti-oxidant activity dropped
later on, but without significant differences
between the different groups.
Discussion
The current study demonstrates that TRP, an
herbal blend derived from traditional Tibetan
medicine, alleviates bronchial reactivity in a
murine model of asthma (Figure 1). The effects of
TRP were compared with budesonide, a wellestablished treatment for asthma that has become
a cornerstone for asthma control. Inhaled corticosteroids allow for decreased airway inflammation and thus decreased airway hyperreactivity
[McMillan et al. 2005]. Pulmonary Penh value
improvement observed with TRP treatment was
even superior to the classical benefit achieved by
budesonide. TRP treatment achieved a significant
decrease in inflammation as seen in H&E sections
(Figure 2). The exact mechanism of TRP in different disease entities is not entirely elucidated.
The beneficial effect of TRP has been attributed
at least in part to its antioxidant properties
[Ginsburg et al. 1999; Mahesh et al. 2009]. In the
current study, TRP was associated with increased
anti-oxidative activity in the lavage but not serum
samples as measured by the luminescence cocktail (Figure 7). The negligible anti-oxidative activity in serum samples compared with that in whole
blood was recently discussed [Ginsburg et al.
2012].
TRP treatment had no significant effect on in
vitro OVA-stimulated T-cell proliferation (Figure 4),
suggesting a different pathway in alleviating asthmaassociated inflammation not necessarily through
a direct inhibition on T-cell proliferation. Airflow
obstruction in asthma is associated with airway
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A Horani, D Shoseyov et al.
Figure 7. Triphala (TRP) had no affect on the bronchoalveolar lavage (BAL) or but not blood anti-oxidant
activity. A Luminol-dependent chemiluminescence (LDCL) induced by the GO (glucose oxidase) cocktail is
shown, using lavage (a) and whole blood (b) samples obtained from naïve animals, untreated ovalbumin
(OVA)-induced lung injury, TRP- and budesonide-treated animals with OVA lung injury. The intensity of light,
generated by the GO cocktail alone (not shown) was at a constant level of 252,000 cpm. Data represent
mean ± standard error (SE) from six animals per group. (a) Luminol-dependent chemiluminescence (LDCL)
induced by the GO cocktail, using 10 µl amounts of plasma. (b) Lavage samples. This anti-oxidant activity was
significant (p < 0.04) in the BAL of the TRP treatment group compared to the control OVA induced asthma
starting at 360 seconds. There were no significant differences in the plasma anti-oxidant activity between the
different groups.
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Therapeutic Advances in Respiratory Disease 6 (4)
inflammation that is enriched with eosinophils
and CD4+ T lymphocytes [Busse and Lemanske,
2001]. The role of CD4+ T cells in the pathogenesis of asthma is well documented [Bosse and
Rola-Pleszczynski, 2007]. The paralleled decrease
in CD4+ cells in the liver as a result of TRP exposure can be the result of extrapulmonary immune
organs being a target for timing, migration and
location of antigen-specific T-cell division during
airway inflammation [Hutchison et al. 2009].
Nevertheless, recent reports have suggested that
TRP can affect lymphocytes distribution and ameliorate inflammation in a hepatic fibrosis model
regardless of its anti-oxidant properties [Ginsburg
et al. 2009]. Other than lungs, in the current study
we have investigated liver and spleen lymphocyte
alterations, for possible distinct phases and locations of antigen presentation in airways inflammation. In our model of lung injury, TRP treatment
induced a significant multi-organ shift in CD4+
cells distribution (Figure 5). Following asthma
induction, lung CD4+ T cells decreased. TRP
treatment, on the other hand, caused a significant
increase in lung CD4+ cells. This latter increase
was paralleled by a significant decrease in liver
CD4+ content. The elevation of CD4+ T cells
with the protected phenotype observed in the
TRP-treated mice could be reconcile with T regulatory cells or perhaps T cells that secrete high levels of IL-10 or other anti-inflammatory mediators.
NKT cells play an essential pathogenic role in
asthma [Akbari et al. 2006]. Activation of NKT
cells can either induce or prevent allergen-induced
airway hyperreactivity [Hachem et al. 2005; Stock
et al. 2004; Kim et al. 2004]. Although TRP was
previously shown to significantly affect hepatic
NKT cells in a model of liver fibrosis [Ginsburg
et al. 2009], we did not see significant changes in
NKT cell numbers in the lungs, livers or spleen
after IP administration of TRP. That said, we did
notice a decreasing trend in NKT cell numbers in
the liver and an increasing trend in the lungs. The
overall pattern of change in the lymphocyte distribution in the liver, spleen and lungs suggests a
possible immune regulation in the OVA model of
lung injury through an effect on lung CD4 and
possibly NKT lymphocytes, which may further
explain the beneficial effect of TRP. The induction of adaptive immunity requires antigenpresenting cells (APCs), and dendritic cells (DCs)
are the main types of APCs involved in the induction of TH2 responses to allergens in asthma. In
the lung, DCs can be found throughout the
conducting airways, interstitium, vasculature and
208
pleura and in bronchial lymph nodes [Kim et al.
2010]. In addition, the imbalance between Th-1
and Th-2 immune response in asthma, promote
increased inflammation in the airways which in
turn causes increased airway hyperreactivity
[Robinson et al. 1992; Kim et al. 2010].
We recently suggested a multi-organ shift of lymphocyte subsets in a murine model of OVAinduced lung injury mimicking asthma [Horani
et al. 2011]. Lymphocytes ‘redistribution’ in the
liver, lung and spleen was associated with
decreased lung reactivity as well as decreased lymphocytic infiltration seen after treatment with
β-glucosylceramide. This observation is further
strengthened by the relative hepatotoxicity seen
after OVA induction (Figure 6). Serum ALT levels
confirm liver involvement as they increased following OVA induction in untreated and, to a lesser
extent, TRP-treated groups with lung injury.
TRP’s effect on the adoptive immune response
seems to be different than the anti-humoral effect
of budesonide (Figure 3). Anti-OVA antibodies
further confirm that budesonide alleviates OVAinduced asthma via an effect on the humoral arm
of the immune system, compared with TRP that
had no effect on antibody production.
Triphala’s beneficial effect in a murine model of
asthma can be caused by both an immunomodulatory effect as well as an anti-oxidative effect
working in concert. Indeed the importance of
increased oxidative burden in the pathogenesis of
asthma is increasingly recognized [Yalcin et al.
2012; Hox et al. 2011; Celik et al. 2012] suggesting that lowering the oxidative injury in asthmatic
lungs can potentially lower airway hyperactivity.
We have previously shown that Triphala’s immunomodulatory effects are independent of its antioxidant properties [Horani et al. 2011] suggesting
that both the immunomodulation and anti-oxidative capacity observed in the bronchoalveolar
fluid may indeed be synergic.
In conclusion, TRP treatment caused significant
amelioration of OVA-induced asthma. This amelioration was associated with changes in the distribution of lymphocyte subsets in lungs, liver and
spleen. TRP was also associated with increased
anti-oxidative activity in the lavage samples. Our
data extend our understanding of the effect of
lymphocyte alterations in asthma and the potential role of safe natural compounds in asthma
treatment.
http://tar.sagepub.com
A Horani, D Shoseyov et al.
Acknowledgment
Special thanks are due to Dr Thomas Ferkol
(Washington University in Saint Louis) for his
comments and advice regarding this manuscript.
Funding
This work was supported by the Israel Scientific
Foundation (ISF), Chief Scientist and the Israel–
American Bi-national Scientific Foundation
(BSF).
Conflict of interest statement
All authors declare that there are no conflicts of
interest
References
Akbari, O., Faul, J., Hoyte, E., Berry, G., Wahlstrom,
J., Kronenberg, M. et al. (2006) CD4+ invariant
T-cell-receptor+ natural killer T cells in bronchial
asthma. N Engl J Med 354: 1117–1129.
Akbari, O., Stock, P., DeKruyff, R. and Umetsu,
D. (2003) Role of regulatory T cells in allergy and
asthma. Curr Opin Immunol 15: 627–633.
Bosse, Y. and Rola-Pleszczynski, M. (2007)
Controversy surrounding the increased expression of
TGF beta 1 in asthma. Respir Res 8: 66–70.
Busse, W. and Lemanske, R., Jr (2001) Asthma.
N Engl J Med 344: 350–362.
Celik, M., Tuncer, A., Soyer, O., Saçkesen, C., Tanju
Besler, H. and Kalayci, O. (2012) Oxidative stress
in the airways of children with asthma and allergic
rhinitis. Pediatric Allergy Immunol, in press.
Cohn, L., Elias, J. and Chupp, G. (2004) Asthma:
mechanisms of disease persistence and progression.
Annu Rev Immunol 22: 789–815.
Gieldanowski, J., Dutkiewicz, T., Samochowiec, L.
and Wojcicki, J. (1992) Padma 28 modifies
immunological functions in experimental
atherosclerosis in rabbits. Arch Immunol Ther Exp
40: 291–295.
Ginsburg, I., Koren, E., Horani, A., Mahamid, M.,
Doron, S., Muhanna, N. et al. (2009) Amelioration of
hepatic fibrosis via Padma Hepaten is associated with
altered natural killer T lymphocytes. Clin Exp Immunol
157: 155–164.
part I: the role in light emission of combinations of
luminal with SIN-1, selenite, albumin, glucose oxidase
and Co2+. Inflammopharmacology 12: 289–303.
Ginsburg, I., Sadovnic, M., Oron, M. and Kohen, R.
(2004b) Novel chemiluminescence-inducing cocktails,
part II: measurement of the anti-oxidant capacity of
vitamins, thiols, body fluids, alcoholic beverages and
edible oils. Inflammopharmacology 12: 305–320
Ginsburg, I., Sadovnik, M., Sallon, S., MiloGoldzweig, I., Mechoulam, R., Breuer, A. et al.
(1999) PADMA-28, a traditional Tibetan herbal
preparation inhibits the respiratory burst in human
neutrophils, the killing of epithelial cells by mixtures
of oxidants and pro-inflammatory agonists and
peroxidation of lipids. Inflammopharmacology 7: 47–62.
Grunig, G., Warnock, M., Wakil, A., Venkayya,
R., Brombacher, F., Rennick, D. et al. (1998)
Requirement for IL-13 independently of IL-4 in
experimental asthma. Science 282: 2261–2263.
Hachem, P., Lisbonne, M., Michel, M., Diem, S.,
Roongapinun, S., Lefort, J. et al. (2005) Alphagalactosylceramide-induced iNKT cells suppress
experimental allergic asthma in sensitized mice: role of
IFN-gamma. Eur J Immunol 35: 2793–2802.
Hamelmann, E., Schwarze, J., Takeda, K., Oshiba, A.,
Larsen, G., Irvin, C. et al. (1997) Noninvasive
measurement of airway responsiveness in allergic mice
using barometric plethysmography. Am J Respir Crit
Care Med 156: 766–775.
Horani, A., Shoseyov, D., Doron, S., Mruwat, R.,
Amer, J., Kerem, E. et al. (2011) Immune modulation
of ovalbumin-induced lung injury in mice using betaglucosylceramide and a potential role of the liver.
Immunobiology 216: 548–557.
Hox, V., Vanoirbeek, J., Callebaut, I., Bobic, S.,
De Vooght, V., Ceuppens, J. et al. (2011) Airway
exposure to hypochlorite prior to ovalbumin induces
airway hyperreactivity without evidence for allergic
sensitization. Toxicol Lett 204: 101–107.
Hutchison, S., Choo-Kang, B., Gibson, V., Bundick, R.,
Leishman, A., Brewer, J. et al. (2009) An investigation
of the impact of the location and timing of antigenspecific T cell division on airways inflammation. Clin
Exp Immunol 155: 107–116.
Jagetia, G., Baliga, M., Malagi, K. and Sethukumar
Kamath, M. (2002) The evaluation of the
radioprotective effect of Triphala (an ayurvedic
rejuvenating drug) in the mice exposed to gammaradiation. Phytomedicine 9: 99–108.
Ginsburg, I., Kohen, R. and Koren, E. (2012) Is the
exclusive use of plasma to quantify oxidant-scavenging
abilities in clinical settings representing the true redox
status in vivo? Engl J Med, in press.
Kim, H., DeKruyff, R. and Umetsu, D. (2010) The
many paths to asthma: phenotype shaped by innate
and adaptive immunity. Nat Immunol 11(7): 577–584.
Ginsburg, I., Sadovnic, M., Oron, M. and Kohen, R.
(2004a) Novel chemiluminescence-inducing cocktails,
Kim, J., Kim, D., Chang, W., Hong, C., Park, S.,
Kim, S. et al. (2004) Asthma is induced by intranasal
http://tar.sagepub.com
209
Therapeutic Advances in Respiratory Disease 6 (4)
coadministration of allergen and natural killer T-cell
ligand in a mouse model. J Allergy Clin Immunol 114:
1332–1338.
Lisbonne, M., Diem, S., de Castro Keller, A., Lefort, J.,
Araujo, L., Hachem, P. et al. (2003) Cutting edge:
invariant V alpha 14 NKT cells are required
for allergen-induced airway inflammation and
hyperreactivity in an experimental asthma model.
J Immunol 171: 1637–1641.
Lomask, M. (2006) Further exploration of the Penh
parameter. Exp Toxicol Pathol 57(Suppl. 2): 13–20.
Maddox, L. and Schwartz, D. (2002) The
pathophysiology of asthma. Annu Rev Med
53: 477–498.
Mahesh, R., Bhuvana, S. and Begum, V. (2009) Effect
of Terminalia chebula aqueous extract on oxidative
stress and antioxidant status in the liver and kidney of
young and aged rats. Cell Biochem Funct 27: 358–363.
210
Stock, P., Kallinich, T., Akbari, O., Quarcoo, D.,
Gerhold, K., Wahn, U. et al. (2004) CD8(+)
T cells regulate immune responses in a murine
model of allergen-induced sensitization and
airway inflammation. Eur J Immunol
34: 1817–1827.
Suter, M. and Richter, C. (2000) Anti- and prooxidative properties of PADMA 28, a Tibetan herbal
formulation. Redox Rep 5: 17–22.
Tasduq, S., Mondhe, D., Gupta, D., Baleshwar, M.
and Johri, R. (2005) Reversal of fibrogenic events in
liver by Emblica officinalis (fruit), an Indian natural
drug. Biol Pharmaceut Bull 28: 1304–1306.
Naik, G., Priyadarsini, K., Bhagirathi, R., Mishra, B.,
Mishra, K., Banavalikar, M. et al. (2005) In vitro
antioxidant studies and free radical reactions
of triphala, an ayurvedic formulation and its
constituents. Phytother Res 19: 582–586.
Tasduq, S., Singh, K., Satti, N., Gupta, D.,
Suri, K. and Johri, R. (2006) Terminalia chebula
(fruit) prevents liver toxicity caused by subchronic administration of rifampicin, isoniazid and
pyrazinamide in combination. Human Exp Toxicol 25:
111–118.
Robinson, D., Hamid, Q., Ying, S., Tsicopoulos, A.,
Barkans, J., Bentley, A. et al. (1992) Predominant
TH2-like bronchoalveolar T-lymphocyte population
in atopic asthma. N Engl J Med 326: 298–304.
SAGE journals
Srikumar, R., Parthasarathy, N., Manikandan, S.,
Narayanan, G. and Sheeladevi, R. (2006) Effect of
Triphala on oxidative stress and on cell-mediated
immune response against noise stress in rats. Mol Cell
Biochem 283: 67–74.
McMillan, S., Xanthou, G. and Lloyd, C. (2005)
Therapeutic administration of Budesonide ameliorates
allergen-induced airway remodelling. Clin Exp Allergy
35: 388–396.
Neurauter, G., Wirleitner, B., Schroecksnadel, K.,
Schennach, H., Ueberall, F. and Fuchs, D. (2004)
PADMA 28 modulates interferon-gamma-induced
tryptophan degradation and neopterin production
in human PBMC in vitro. Int Immunopharmacol
4: 833–839.
Visit SAGE journals online
http://tar.sagepub.com
Safadi, R., Ohta, M., Alvarez, C., Fiel, M., Bansal, M.
Mehal, W. et al. (2004) Immune stimulation of hepatic
fibrogenesis by CD8 cells and attenuation by transgenic
interleukin-10 from hepatocytes. Gastroenterology 127:
870–882.
Safadi, R., Alvarez, C., Ohta, M., Brimnes, J., Kraus,
T., Mehal, W. et al. (2005) Enhanced oral tolerance
in transgenic mice with hepatocyte secretion of IL-10.
J Immunol 175: 3577–3583.
Wills-Karp, M., Luyimbazi, J., Xu, X., Schofield,
B., Neben, T., Karp, C. et al. (1998) Interleukin-13:
central mediator of allergic asthma. Science 282:
2258–2261.
Yalcin, A., Gorczynski, R., Parlak, G., Kargi, A.,
Bisgin, A., Sahin, E. et al. (2012) Total antioxidant
capacity, hydrogen peroxide, malondialdehyde and
total nitric oxide concentrations in patients with
severe persistent allergic asthma: its relation to
omalizumab treatment. Clin Lab 58: 89–96.
Yu, K. and Porcelli, S. (2005) The diverse functions
of CD1d-restricted NKT cells and their potential for
immunotherapy. Immunol Lett 100: 42–55.
http://tar.sagepub.com