GC-MS Analysis: <i>In Vivo</i> Hepatoprotective and Antioxidant Activities of the Essential Oil of <i>Achillea biebersteinii</i> Afan. Growing in Saudi Arabia

Al-Said, Mansour S.; Mothana, Ramzi A.; Al-Yahya, Mohammed M.; Rafatullah, Syed; Al-Sohaibani, Mohammed O.; Khaled, Jamal M.; Alatar, Abdulrahman; Alharbi, Naiyf S.; Kurkcuoglu, Mine; Baser, Husnu C.

doi:https://doi.org/10.1155/2016/1867048

Evidence-Based Complementary and Alternative Medicine

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Research Article | Open Access

Volume 2016 | Article ID 1867048 | https://doi.org/10.1155/2016/1867048

GC-MS Analysis: In Vivo Hepatoprotective and Antioxidant Activities of the Essential Oil of Achillea biebersteinii Afan. Growing in Saudi Arabia

Mansour S. Al-Said,¹Ramzi A. Mothana,¹Mohammed M. Al-Yahya,¹Syed Rafatullah,¹Mohammed O. Al-Sohaibani,²Jamal M. Khaled,³Abdulrahman Alatar,³Naiyf S. Alharbi,³Mine Kurkcuoglu,⁴and Husnu C. Baser^3,5

Academic Editor: Vincenzo De Feo

Received22 Feb 2016

Revised05 Apr 2016

Accepted20 Apr 2016

Published12 May 2016

Abstract

Liver disease is a worldwide problem. It represents one of the main causes of morbidity and mortality in humans. Achillea biebersteinii is used as herbal remedy for various ailments including liver diseases. But the scientific basis for its medicinal use remains unknown. Thus, this research was undertaken to evaluate the efficiency of A. biebersteinii essential oil (ABEO) (0.2 mL/kg) in the amelioration of CCl₄-induced hepatotoxicity in rodent model. Moreover, the chemical content of the oil was investigated using GC and GC-MS. The following biochemical parameters were evaluated: serum glutamic oxaloacetic transaminase (GOT), glutamic-pyruvic transaminase (GPT), gamma-glutamyl-transpeptidase (γ-GGT), alkaline phosphatase (ALP), and total bilirubin. Furthermore, lipid profile, malondialdehyde (MDA), nonprotein sulfhydryl (NP-SH), and total protein (TP) contents in liver tissue were estimated. 44 components (92.0%) of the total oil have been identified by GC-MS analysis where α-terpinene and -cymene were the most abundant. The high serum enzymatic (GOT, GPT, GGT, and ALP) and bilirubin concentrations as well as the level of MDA, NP-SH, and TP contents in liver tissues were significantly reinstated towards normalization by the ABEO. Histopathological study further confirmed these findings. In addition, ABEO showed mild antioxidant activity in 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and β-carotene-linoleic acid assays.

1. Introduction

In human, liver disease which is a worldwide problem is considered one of the most important diseases that cause a significant proportion of morbidity and mortality in all age-groups. World health organization (WHO) estimated that chronic hepatitis c patients reached approximately 170 million people worldwide and 3-4 million people are annually added to that list. In addition, it is reported that hepatitis B virus (HBV) causes annually more than 2 billion infections and over 5 million people are being affected annually. The available treatment options for liver diseases are predominantly limited in efficiency, have often serious side effects, and are too costly especially for the developing country [1–3]. The key features of therapeutic agent are a high effectiveness and low threat of side effects. Thus, improvement of novel and more substantial hepatoprotective drugs with minor side effects is obligatory. Many medicinal herbs are showing such characteristics and might represent new active therapeutic drugs.

The genus Achillea (family: Asteraceae) is represented by four species in Saudi Arabia. Achillea biebersteinii Afan., locally known as “Althufra,” is native to the Arabian Peninsula, including Saudi Arabia, Yemen, and Oman, as well as to countries around the Mediterranean Sea. A. biebersteinii is a perennial herb, 30 to 60 cm high. The aerial part of the plant is commonly used in the form of decoction by folkloric practitioners for the treatment of several ailments including abdominal pain, wound healing, jaundice, and other liver diseases. In phytochemical and pharmacological studies, the antibacterial, antifungal, and antioxidant activities of the plant have been reported [4–6]. To the best of our knowledge, no previous investigation on the protective activity of the essential oil of A. biebersteinii against CCl₄-induced hepatotoxicity in rats has been reported. Thus, the current study was undertaken to evaluate the protective effect of the essential oil on CCl₄-induced hepatotoxicity and to elucidate the possible mechanisms underlying these protective effects in rats. Moreover, in vitro antioxidant activities were assessed by DPPH radical scavenging and β-carotene linoleic acid assays.

2. Materials and Methods

2.1. Plant Material

The herb of Achillea biebersteinii was collected from south of Saudi Arabia in February 2010. The identification and authentication of the plant were performed by Dr. Mohammed Yousuf and deposited (voucher specimen (# 5610)) at the Herbarium of the College of Pharmacy, King Saud University, Riyadh, Saudi Arabia.

2.2. Extraction of the Essential Oil

The aerial parts of A. biebersteinii were dried and powdered and then extracted by hydrodistillation method for 3 h according to the European Pharmacopoeia using a Clevenger-type apparatus. Anhydrous sodium sulfate was used to dry the obtained oil (ABEO) and after that the oil was filtered and stored at +4°C until the following analysis and tests.

2.3. Gas Chromatography Analysis

An Agilent 6890N GC system was used to perform the GC analysis. A temperature of FID detector was adjusted to 300°C and identical operational settings used in a duplicate of the same column were applied in GC-MS analysis. Synchronous autoinjection was carried out to achieve the same retention times. Relative proportion amounts of the separated compounds were counted from integration of the peaks in FID chromatogram.

2.4. Gas Chromatography-Mass Spectrometry

The GC-MS analysis was performed with an Agilent 5975 GC-MSD system with Innowax FSC column (60 m × 0.25 mm, 0.25 μm film thickness). Helium was used as carrier gas at a flow rate of 0.8 mL/min. Oven temperature was programmed to 60°C for 10 min and raised to 220°C at rate of 4°C/min. Temperature was stilled constant at 220°C for 10 min and then upraised to 240°C at a rate of 1°C/min. Mass spectra were recorded at 70 eV with the mass range 35 to 450.

2.5. Identification of Compounds

The identification of ABEO components was done by comparing the retention times of oil components with standard samples or by comparing the relative retention indices to series of n-alkanes. Computer matching against commercial (Wiley GC/MS Library, Adams Library, and MassFinder 2.1 Library) [7, 8] and in-house library, “Baser Library of Essential Oil Constituents,” built up by genuine compounds and components of known oils, as well as MS literature data [9, 10], was used to identify the essential oil components.

2.6. Animals

Wistar albino rats of either sex were procured from Experimental Animal Care Center, College of Pharmacy, King Saud University, Riyadh. Rats were approximately 8–10 weeks old and weighed 180–200 g. For the sleeping time and acute toxicity tests, Swiss albino mice were used. The animals were kept in controlled environment at °C (temperature), 55% humidity, and 12 h light : 12 h dark cycle. Drinking water and Purina chow diet ad libitum were provided. The procedure of the present study was permitted by the Ethics Committee of the Experimental Animal Care Society, College of Pharmacy, King Saud University, Riyadh.

2.7. Experimental Design

2.7.1. Acute Toxicity Test

To evaluate the acute toxicity of A. biebersteinii essential oil on mice, several doses were tried. The different groups were administered with numerous doses (0.1–0.5 mL/kg) using the oral route. The clinical signs and symptoms of toxicity were observed continuously after treatment for 4 h (1, 1:30, 2, 2:30, 3, 3:30, and 4 h) and then after 72 h. The mortality was recorded daily for 14 days [11].

2.7.2. Carbon Tetrachloride-Induced Liver Toxicity

The rats were randomly divided into 4 groups (6 rats per group); after that each group randomly was named (control, CCl₄ only, CCl₄ + ABEO, and CCl₄ + silymarin). The control group was kept without treatment while other groups were administrated intraperitoneally (IP) with 1.25 mL/kg of CCl₄ body weight. CCl₄ + ABEO and CCl₄ + silymarin group were given 0.2 mL/kg of A. biebersteinii essential oil (ABEO) and silymarin at a dose of 10 mg/kg orally. The treatment by ABEO and silymarin was started 3 weeks prior to CCl₄ administration and continued until the end of the experiment. 24 hours after the CCl₄ treatment, the blood was collected from all groups and then the serum was separated from clotted blood. Ether anesthesia was used to sacrifice the animal after collecting the blood. The liver was dissected to perform the biochemical and histological examination.

2.7.3. Estimation of Marker Enzymes and Bilirubin

Serum glutamate oxaloacetate transaminase (SGOT), serum glutamate pyruvate transaminase (SGPT), alkaline phosphatase (ALP), gamma-glutamyl transferase (GGT), hemoglobin, and bilirubin were determined using a Reflotron® Plus Analyzer and Roche kits [12–15].

2.7.4. Estimation of the Lipid Profile

Commercial diagnostic kits were used to estimate total cholesterol, triglycerides, high-density lipoproteins (HDL-C), and glucose levels [16–18].

2.7.5. Determination of Malondialdehyde (MDA)

The protocol explained by Utley et al. [19] was followed. Potter-Elvehjem type C homogenizer was used to homogenize the liver tissues in KCL solution (0.15 M) at 4°C to obtain 10% of tissue (w/v). Metabolic shaker was used to incubate 1 mL of the homogenate at 37°C for 3 h. Then the homogenate was mixed with 10% aqueous trichloroacetic acid (1 : 1). The mixture was separated into supernatant and sediment by centrifugation at 800 ×g for 10 min. 1 mL of thiobarbituric acid (0.67% in water) was add to 1 mL of the supernatant and then was placed in water bath at 100°C for 10 min. After cooling, the dilution was done by 1 mL distilled water. The optical density of the solution was recorded at 535 nm by spectrophotometer and then the concentration of malondialdehyde (nmol/g wet tissue) was calculated from a standard curve of malondialdehyde solution.

2.7.6. Estimation of Nonprotein Sulfhydryls (NP-SH)

Hepatic nonprotein sulfhydryls were estimated according to the assay of Sedlak and Lindsay [20]. Homogenization of liver tissue samples was performed in ice-cold ethylenediaminetetraacetic acid (EDTA) (0.02 mmol/L). 1 mL of 50% trichloroacetic acid (TCA) and 4 mL distilled water was added to 5 mL of the homogenate placed in 15 mL test tube. After shaking for 10 min, the tubes were centrifuged at 3000 rpm and then 2 mL of supernatant was removed and mixed with 4 mL Tris buffer (0.4 mol/L, pH 8.9). The mixture was shaken with 0.1 mL of 5,5′-dithio-bis (2-nitrobenzoic acid) (DTNB) for 5 min; then immediately the optical density at 412 nm was measured by spectrophotometer against a reagent blank.

2.7.7. Determination of Total Protein (TP)

Total protein in serum (g/L) was determined by colorimetric method using total protein kit CS610 (Crescent Diagnostics, Jeddah, Saudi Arabia). The colorimetric assay for determining total protein concentration in serum is based on the chemical reaction between copper ion (in biuret reagent) and peptide bonds (in serum proteins) in alkaline solution to give a blue/violet color. Tartrate and iodide are added as stabilizer and inhibitor of autoreduction of the alkaline copper complex. The optical density of the blue/violet colored complex was estimated at 546 nm by short-cut-assay. The serum total protein was calculated using the following equation:where the mean absorbance of sample and refer to absorbance of standard protein (g/L).

2.7.8. Histopathological Assessment

The microsection of liver tissues (5 μm thickness) was produced by American-made optical rotary microtome according to VIP tissue processor. The pathomorphological changes in the microsection of liver tissues stained with hematoxylin and eosin stain were studied by light microscope [21].

2.8. Studies of Antioxidant Activity

2.8.1. Scavenging Activity of DPPH Radical

The antioxidant activity of ABEO was evaluated by DPPH free radical scavenging assay according to Brand-Williams et al. [22]. In the presence of an antioxidant, the DPPH radicals (purple color) turn to reduced DPPH (yellow color). The change of the optical density is recorded by spectrophotometer at 517 nm. Five concentrations 10, 50, 100, 500, and 1000 μg/mL of ABEO were prepared. Briefly, the total volume of test mixture containing 500 μL of ABEO, 125 μL DPPH, and 375 μL solvent was mixed and then incubated at 25°C for 30 min. The change in color was determined at 517 nm by spectrophotometer (UVmini-1240, Shimadzu, Japan). As positive control in this assay, the known antioxidant ascorbic acid was used. The radical scavenging activity was measured using the following equation:

2.8.2. β-Carotene-Linoleic Acid Assay

To determine the antioxidant activities of ABEO, the β-carotene bleaching assay was performed according to Mohd-Esa et al. [23]. β-carotene solution (0.2 mg/mL) was prepared with chloroform; then 1 mL of this solution was added to a solution of 0.2 mL of Tween-20 and 0.02 mL of linoleic acid. Using rotary evaporator the chloroform was removed. The mixture was diluted with 100 mL of distilled water and mixed for 2 min. A 5 mL of the mixture was mixed with 0.2 mL of ABEO (1 mg/mL) and incubated in a water bath at 40°C for 2 h. The optical density was recorded at 470 nm at 15 min intervals, by a UV-visible spectrophotometer (UVmini-1240, Shimadzu, Japan). Rutin was used as a positive control prepared (1 mg/mL). The antioxidant activity was estimated using the following equation:where and are the optical density values determined at zero time of incubation for ABEO and control, respectively. and are the optical density values for ABEO and control, respectively, at 120 min.

2.9. Statistical Analysis

A completed random design (CRD) was applied in the present study. The results are expressed as mean ± standard error. The data were statistically analyzed by ANOVA, followed by Dunnett’s multiple comparison test.

3. Results

3.1. Composition of the Essential Oil

Hydrodistillation of the aerial parts of Achillea biebersteinii afforded yellow oil with a yield of 0.70% (w/w) on dry weight basis. The Kovats retention indices, percentage composition, and identification tools are demonstrated in Table 1. The identified compounds are arranged according to their elution on the Innowax FSC column. 44 components (92.0%) of the total oil of A. biebersteinii (ABEO) have been identified by GC-MS analysis. According to the literature review, nothing was available concerning the qualitative and quantitative analysis of the volatile oil of A. biebersteinii growing in Saudi Arabia. The data in Table 1 indicated that the monoterpene hydrocarbons content of ABEO was high (56.3%). The monoterpene hydrocarbons alfa-terpinene and p-cymene were the most abundant compounds and represented 29.2 and 22.9%, respectively. Moreover, oxygenated monoterpenes accounted for 31.9% of the total oil, with terpinen-4-ol (4.7%), 1,8-cineole (4.3%), trans-p-menth-2-en-1-ol (3.9%), ascaridole (3.1%), trans-piperitone oxide (2.5%), and carvacrol (2.1%) as the major compounds.

3.2. Acute Toxicity

The A. biebersteinii essential oil (ABEO) at various dose concentrations did not demonstrate any mortality or any pathological symptoms even at the highest dose (0.5 mL/kg, p.o.). Based on that, one dose (0.2 mL/kg) was chosen for further pharmacological investigations.

3.3. Effect of ABEO on Marker Enzymes and Bilirubin in Serum

The results of the biochemical indicators of liver function are summarized in Table 2. Administration of CCl₄ significantly caused severe hepatotoxicity in rats, as evidenced by the elevation of serum GOT, GPT, ALP, GGT, and bilirubin. The elevation of the enzymes and bilirubin in serum was significantly diminished in pretreated rat groups with ABEO (0.2 mL/kg) as well as with silymarin (10 mg/kg) when compared with the CCl₄ only treated group.

3.4. Effect of ABEO on Lipid Profile

As demonstrated in Table 3, CCl₄ showed a significant increase in the level of lipid profile in rats. Administration of ABEO attenuated significantly the increased level of cholesterol and triglycerides in rats treated by CCl₄ compared to the normal control group. Moreover, silymarin as well showed a significant reduction of lipid profile in rats compared to those of group treated only by CCl₄.

3.5. Effect of ABEO on Hepatic MDA

As presented in Figure 1, the concentration of hepatic MDA, a final product of lipid peroxidation, in the rats treated by CCl₄ that did not receive ABEO was significantly () high compared to the normal control rats. Interestingly, the rats pretreated with ABEO (0.2 mL/kg) caused a significant decrease in the level of MDA (Figure 1). Also, similar results were obtained in rats treated with silymarin.

3.6. Effect of ABEO on Hepatic NP-SH

As shown in Figure 2, the decreased level of NP-SH in the liver tissues of animals treated with CCl₄ was significantly () lifted by ABEO. The same biological effect was noticed in rats treated with silymarin.

3.7. Effect of ABEO on Hepatic TP

CCl₄ caused significant decrease of the total protein level in Group II (Figure 3). ABEO elevated significantly the protein level in the liver tissue. Silymarin as reference drug produced a significant increase in total protein concentration.

3.8. Effect of ABEO on Histopathological Evaluation

As demonstrated in Figure 4, the histopathological investigations reinforced the data of the biochemical analysis. The micrographs of the liver tissues exhibited serious necrosis and focal hepatic cellular decay of the lobules in rats treated by CCl₄ comparing with normal control rates. Basically normal hepatocytes and central vein were observed in the rats treated with ABEO (0.2 mL/kg). In addition, liver tissues of rats treated with silymarin exhibited normal central vein, sinusoids hepatocytes (Figure 4).

(a)

(b)

(c)

(d)

3.9. Antioxidant Activity of ABEO

As shown in Table 4, ABEO demonstrated a moderate radical scavenging activity particularly at the highest levels of 500 and 1000 μg/mL (42 and 58%) whereas ascorbic acid exhibited a strong activity (92 and 94%). Furthermore, Table 4 showed the antioxidant activity, dependent on the β-carotene bleaching rate of the ABEO. The observed antioxidant activity of ABEO was moderate (53%) in comparison to that of rutin (91%).

4. Discussion

In this research, we investigated the chemical composition and in vivo hepatoprotective and in vitro antioxidant activity of the volatile oil of Achillea biebersteinii (ABEO). To the best of our knowledge this study represents the first investigation of ABEO potential to ameliorate hepato-toxicity induced by CCl₄. Our findings that suggest α-terpinene (29%) and p-cymene (23%) as main constituents of the essential oil (ABEO) in our study are in agreement with an earlier study on A. biebersteinii collected from East Azerbaijan, Iran, where α-terpinene (41%) and p-cymene (13%) were the major components [24]. Other reports on the chemical composition of A. biebersteinii essential oil from Turkey and Iran showed a main chemotype which is characterized by the presence of 1,8-cineole (9–37%) and camphor (16–30%) as major components [4, 25, 26]. Moreover, the GC-MS analysis of the oil of A. biebersteinii collected from Sivas in Turkey has resulted in the identification of piperitone (35%) and eucalyptol (13%) as the main components [6]. Sökmen et al. [6] attributed the richness of these monoterpenes to the collection of the plant material during flowering period. However, we assume that the variation in the chemical composition could be attributed to several factors including the geographical origin, environmental factors in Saudi Arabia, genetic type, and development stage. Previous biological and pharmacological studies on A. biebersteinii demonstrated that the essential oil as well as the crude extract have antibacterial, antifungal, insecticidal, and antioxidant activities [4, 6, 26]. Moreover, Akkol et al. [27] reported remarkable wound healing activity. Recent studies on A. biebersteinii recorded antileishmanial as well as protective and therapeutic effects against gastric ulcer [28, 29].

In an endeavor to evaluate the hepatoprotective effect of ABEO, CCl₄-induced hepatotoxicity model was undertaken in this investigation. CCl₄ is a well-known and commonly used chemical to promote liver injury. The mechanism of CCl₄-induced hepatotoxicity is basically mediated through certain free radical reactions [30]. The toxicity with CCl₄ exists in its metabolic biotransformation by cytochrome P450 system in liver tissues to give two reactive free radicals, namely, trichloromethyl () and trichloromethylperoxy (CCl₃O), which initiate lipid peroxidation process and decrease activities of antioxidant enzyme levels [31–33]. In the current study, CCl₄ caused a significant increase in the serum marker enzymes (GOT, GPT, GGT, and ALP) and bilirubin indicating a wide disturbance in structure and function of liver cells. The results showed that administration of ABEO as well as silymarin significantly restored that pathological increase of these enzymes and indicate a hepatoprotective effect against CCl₄-induced liver damage. Our findings are in agreement with the result demonstrated by Dadkhah et al. [34] for the hepatoprotective effect of the essential oil of A. wilhelmsii, which showed a modulation of the increased enzyme markers. In addition, our results were consistent with the reported results on A. millefolium extract by Yaeesh et al. [35] who demonstrated a decrease of the enzyme levels, for example, ALT and AST, in treated animal groups compared with the control suggesting a hepatoprotective activity for A. millefolium. Surprisingly our findings were unlike the results reported on the ethanol extract of A. biebersteinii [36]. On the contrary, the ethanol extract of A. biebersteinii induced an increase in AST and ALT in a dose-dependent manner [36].

In addition to that, our results showed a noticeable increase in malondialdehyde (MDA) level in liver tissues by CCl₄ indicating enhancement of lipid peroxidation (LPO) which is an essential pathogenic cause for tissue damage [37]. MDA is an end product of lipid peroxidation in liver tissue and is used as a marker of LPO, which takes place in liver toxicity due to the formation of reactive oxygen species (ROS) [37, 38]. A significant decrease of MDA level was observed in rats, which were treated with ABEO and silymarin. Probably ABEO protects the liver cells by prevention of the generation of free radical species and so the decreasing of lipid peroxidation mediated by CCl₄ [39].

Another indicator of hepatotoxicity is the consumption of nonprotein sulfhydryl (NP-SH) content of the liver tissues which could induce further damage and dysfunction of liver [38]. ABEO as well as silymarin increased significantly the level of NP-SH in liver tissues indicating a hepatoprotective effect in the treated animals. Moreover, the depletion of total protein (TP) has been shown to be an indicator for oxidative stress and liver toxicity. CCl₄ significantly induced a decrease of total protein (TP) in CCl₄-treated animals indicating hepatotoxicity. Restoring the levels of TP by ABEO and silymarin denotes a reduction of oxidative stress and thus hepatoprotective effect. Beside the hepatoprotective activity, ABEO showed a relatively moderate in vitro DPPH radical scavenging and antioxidant activity. Our results are in agreement with earlier data published by Sökmen et al. [6], who indicated antioxidant activity for the oil. In general, both effects (hepatoprotective and antioxidative effects) might be in relation to each other.

5. Conclusions

In conclusion, by evaluation of the in vivo hepatoprotective and in vitro antioxidant effects of A. biebersteinii essential oil (ABEO), it has been found that ABEO showed significant protection against CCl₄-induced liver injury, as well as dose-dependent antioxidant activity. The present results confirm a beneficial association between the hepatoprotective effectiveness and the antioxidant activity of the ABEO and support its use in liver disorders by folk medicine practitioners.

Competing Interests

The authors declare that they have no competing interests.

Acknowledgments

The authors extend their appreciation to the Deanship of Scientific Research at King Saud University for funding the work through the research group Project no. (RGP-VPP-073).

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Copyright © 2016 Mansour S. Al-Said et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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