scholarly journals Effect of Selenium Nanoparticles on Carbon Tetrachloride-Induced Hepatotoxicity in the Swiss Albino Rats

2021 ◽  
Vol 11 (7) ◽  
pp. 3044
Author(s):  
Hossam Ebaid ◽  
Jameel Al-Tamimi ◽  
Iftekhar Hassan ◽  
Mohamed A. Habila ◽  
Ahmed M. Rady ◽  
...  
Keyword(s):  
Carbon Tetrachloride ◽  
Liver Function ◽  
Liquid Paraffin ◽  
Plasma Concentrations ◽  
Selenium Nanoparticles ◽  
Albino Rats ◽  
Gamma Glutamyl Transferase ◽  
Protective Effects ◽  
Liver Histopathology ◽  
Glutamyl Transferase

Background: This study investigated selenium nanoparticles’ protective effects (SE-NPs) against carbon tetrachloride (CCl4)-induced hepatic injury in rats. Methods: Rats were divided into four groups (n = 8). Group 1 rats received the vehicle solution only. Group 2 received a single intraperitoneal injection of 1 mL/kg CCl4 in liquid paraffin (1:1 v/v). Group 3 was treated with SE-NPs (2.5 mg/kg) twice a week for three weeks before receiving CCl4 challenge. Oxidative stress, liver function, liver histopathology and serum lipid levels were evaluated. Results: Plasma concentrations of aspartate transaminase (AST), gamma-glutamyl transferase (GGT), alkaline phosphatase (ALP), urea, creatinine, malondialdehyde (MDA) and the toxicity marker, lactate dehydrogenase (LDH), were significantly elevated in rats treated with CCl4 compared to the controls. CCl4 also caused a significant decline in liver glutathione (GSH) concentration. SE-NP pretreatment significantly improved the level of AST, urea, creatinine, MDA, LDH, and GSH in the CCl4-injected rats towards the control levels. Conclusions: SE-NPs restored both liver function and hepatic structure in CCl4 treated rats. SE-NPs exhibit an ability to counter markers of liver injury induced by CCl4 and restore oxidative stability to lipid profiles and liver structure and function.

scholarly journals Protective effects of honey and bee venom against lipopolysaccharide and carbon tetrachloride-induced hepatoxicity and lipid peroxidation in rats

2020 ◽  
Vol 9 (5) ◽  
pp. 693-705
Author(s):  
Noha M Meligi ◽  
Suzan Alaa Ismail ◽  
Nagy S Tawfik
Keyword(s):  
Lipid Peroxidation ◽  
Carbon Tetrachloride ◽  
Hematological Parameters ◽  
Lipid Peroxide ◽  
Alpha Fetoprotein ◽  
Bee Venom ◽  
Albino Rats ◽  
Average Weight ◽  
Protective Effects ◽  
Liver Histopathology

Abstract In the present study, the protective effects of honey and bee venom (BV) either independently or in combination against lipopolysaccharide (LPS) and carbon tetrachloride (CCl4)-induced hepatoxicity, lipid peroxidation, and hematological alterations in male albino rats were investigated. In addition, histopathological alterations of hepatic tissues induced by LPS/CCL4 were recorded. Sixty-four of male albino rats of average weight 120–150 g were included in this study. Rats were divided into eight equal groups of eight. The obtained results demonstrated that treatment with LPS/CCl4 caused an increase in the levels of alpha-fetoprotein, which was accompanied by changes in the hepatic function biomarkers that characterized by the increased levels of transaminases (AST, ALT). The results showed oxidative stress as assigned by the increase in lipid peroxide. Meantime detraction in the antioxidants, including glutathione peroxidase was observed. Interruptions in biochemical parameters accompanied by disturbances in hematological parameters and liver histopathology were resulted due to exposure to LPS/CCl4. This study showed the use of honey and BV provided a protective effect on hepatotoxicity induced by LPS/CCl4. This might have been occurred through the reduction of hepatic transaminases and the “Alpha-fetoprotein” in serum and the equilibration of the antioxidation system, thereby, inhibiting the reactive oxygen species accumulation. Honey and BV administration reestablish disturbed hematological parameters and liver histopathology persuaded by LPS/CCl4. More interesting, we demonstrated that using a combination of the honey and BV showed promising enhancement in their protective effects over the use of just one of the two reagents.

scholarly journals Hepatoprotective Effects of Chinese Medicine Herbs Decoction on Liver Cirrhosis in Rats

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Nor Aziyah Mat-Rahim ◽  
Tong-Hye Lim ◽  
Nur-Asyura Nor-Amdan ◽  
Sazaly AbuBakar
Keyword(s):  
Body Weight ◽  
Liver Cirrhosis ◽  
Liver Enzymes ◽  
Normal Liver ◽  
Cirrhotic Liver ◽  
Albino Rats ◽  
Gamma Glutamyl Transferase ◽  
Protective Effects ◽  
Sprague Dawley ◽  
Glutamyl Transferase

Hepatoprotective and curative activities of aqueous extract of decoction containing 10 Chinese medicinal herbs (HPE-XA-08) were evaluated in Sprague–Dawley albino rats with liver damage induced by thioacetamide (TAA). These activities were assessed by investigating the liver enzymes level and also histopathology investigation. Increases in alkaline phosphatase (ALP) and gamma-glutamyl transferase (GGT) levels were observed in rats with cirrhotic liver. No significant alterations of the liver enzymes were observed following treatment with HPE-XA-08. Histopathology examination of rats treated with HPE-XA-08 at 250 mg/kg body weight, however, exhibited moderate liver protective effects. Reduced extracellular matrix (ECM) proteins within the hepatocytes were noted in comparison to the cirrhotic liver. The curative effects of HPE-XA-08 were observed with marked decrease in the level of ALP (more than 3x) and level of GGT (more than 2x) in cirrhotic rat treated with 600 mg/kg body weight HPE-XA-08 in comparison to cirrhotic rat treated with just water diluent. Reversion of cirrhotic liver to normal liver condition in rats treated with HPE-XA-08 was observed. Results from the present study suggest that HPE-XA-08 treatment assisted in the protection from liver cirrhosis and improved the recovery of cirrhotic liver.

scholarly journals Hepatoprotective and Reno-protective Effects of Artichoke Leaf Extract and Rosemary Extract against Paracetamol Induced Toxicity in Albino Rats

2020 ◽  
pp. 67-81
Author(s):  
Eman Aly Sadeek Fadlalla ◽  
Sahar Mousa Galal
Keyword(s):  
Leaf Extract ◽  
Serum Levels ◽  
Negative Control ◽  
Rosemary Extract ◽  
Albino Rats ◽  
Gamma Glutamyl Transferase ◽  
Protective Effects ◽  
Liver And Kidney ◽  
Glutamyl Transferase ◽  
Artichoke Leaf Extract

Background: Paracetamol overdose is a predominant cause of hepatotoxicity and nephrotoxicity in both humans and experimental animals. There is an emerging focus on plant products to find a highly effective and reliable drug for the prevention of paracetamol –induced toxicity. Objective: In this study, we investigated the Hepatoprotective and Reno-protective Effects of artichoke (Cynara scolymus L.) Leaf extract and rosemary (Rosmarinus officinalis L.) extract against paracetamol Induced toxicity in Albino Rats. Materials and Methods: Rats were divided into five groups: Negative control, paracetamol (1000 mg/kg dose) PCT, artichoke leaf extract “ALE” (1.5  g/kg, orally + paracetamol for 30 d), rosemary extract “RE” (125  mg/kg + paracetamol for 30 days) and the last group was treated with PCT+ ALE+ RE for 30 days. Results: Paracetamol caused marked liver damage as noted by significant increased activities of serum aminotransferases, alkaline phosphatase, gamma-glutamyl transferase and lactate dehydrogenase. Paracetamol also raised serum levels of urea, creatinine, and Cystatin-C. In addition, there was a significant decrease in serum total protein and albumin. Paracetamol caused an elevation in lipid peroxidation paralleled with significant decline in reduced glutathione (GSH) level and activities of glutathione-S- transferase (GST), glutathione (GPX) peroxidase, and superoxide dismutase (SOD) in the liver and kidney. These results are confirmed in the histological examination of the liver and kidney. Conclusion: Treatment with artichoke leaf extract (ALE) and rosemary extract (RE) produced a potential protection of the liver and kidney against biochemical and histological alterations and oxidative stress induced by paracetamol.

scholarly journals Effect of nanopolysaccharide (BSEPS) from Bacillus subtilis sp. on thioacetamide-induced liver fibrosis in rats

2019 ◽  
Vol 43 (1) ◽  
Author(s):  
Manal G. Mahmoud ◽  
Mohsen S. Asker ◽  
Mohamed E. El Awady ◽  
Amal I. Hassan ◽  
Nadia A. R. Zaharan ◽  
...  
Keyword(s):  
Bacillus Subtilis ◽  
Liver Fibrosis ◽  
Transforming Growth Factor Beta ◽  
Transforming Growth Factor ◽  
Periodate Oxidation ◽  
Hepatic Tissue ◽  
Albino Rats ◽  
Gamma Glutamyl Transferase ◽  
Glutamyl Transferase ◽  
Tgf Β1

Abstract Background Nanomedicine contributes to the efficiency of pharmacological treatments and progresses rapidly. The present study was designed to produce exopolysaccharide (BSEPS) from Bacillus subtilis sp. strain reported in our previous study was further characterized, and its BSEPS for synthesis of the nanoparticle Ag-BSEPS using microwave heating to determine the possible effects of a prepared solution containing Ag-BSEPS versus thioacetamide (TAA) evoked liver fibrosis in Wister albino rats. Nanoparticles with silver (Ag) core have been synthesized in an aqueous solution after exposure of BSEPS to periodate oxidation. Animals were split into four groups: I - control rats, water ad libitum for 6 weeks; II - rats were injected with TAA 200 mg/kg-1 3 times/week for 4 weeks IP; III - Ag-BSEPS 100 mg/kg-1 IP twice a week for 6 weeks; and IV - TAA, as group II followed by Ag-BSEPS as group III. The antifibrotic effects of Ag-BSEPS were appraised by determining different hepatotoxicity indices, oxidative stress, and inflammatory and liver fibrosis markers. Results Nanoparticles were obtained with a diameter size range of 50–100 nm characterized by SEM and TEM without using any harmful reagents. Results evinced considerably reduced activity of liver functions such as transaminases (AST, ALT), gamma-glutamyl transferase (GGT), and alkaline phosphatase (ALP) in the group which received TAA followed by Ag-BSEPS compared to the other group which received only TAA. In the current results, the administration of Ag-BSEPS showed an improvement in the proinflammatory cytokines. On the contrary, the antioxidant enzymes in liver homogenates revealed significant improvement (concentration of glutathione peroxidase (GSH-PX), superoxide dismutase (SOD), and catalase (CAT) increases) in animals with TAA-induced liver damage followed by Ag-BSEPS. Moreover, the activities of the fibrotic markers transforming growth factor-beta 1(TGF-β1) and type III pro-collagen (PCIII) were increased in liver tissues in the group which was given TAA alone as compared to the controls. The percentage of fibrosis of hepatic tissue had a positive correlation with the levels of PCIII and TGF-β1, followed by Ag-BSEPS compared to the TAA group without nanocomposite treatment. Microscopic examinations revealed inhibitory effects of Ag-BSEPS on inflammatory changes and deterrent of liver fibrosis. Conclusion It was suggested that the biochemical and histological amelioration observed in Ag-BSEPS (100 mg/kg-1 twice a week for 6 weeks) treated the fibrotic rats.

scholarly journals Association of Two Indices of Insulin Resistance Marker with Abnormal Liver Function Tests: A Cross-Sectional Population Study in Taiwanese Adults

Medicina ◽  
2021 ◽  
Vol 58 (1) ◽  
pp. 4
Author(s):  
Adi Lukas Kurniawan ◽  
Chien-Yeh Hsu ◽  
Jane C.-J. Chao ◽  
Rathi Paramastri ◽  
Hsiu-An Lee ◽  
...  
Keyword(s):  
Insulin Resistance ◽  
Liver Function ◽  
Early Stage ◽  
Abnormal Liver Function ◽  
Low Grade ◽  
Positive Trend ◽  
Gamma Glutamyl Transferase ◽  
Cross Sectional ◽  
Tyg Index ◽  
Glutamyl Transferase

Background and objectives: Insulin resistance (IR) is frequently associated with chronic low-grade inflammation and has an important role as a mediator in the development of liver disease. Thus, this study aimed to explore the relationship between two indexes of IR and abnormal liver function parameters. Materials and Methods: This cross-sectional study obtained data of 41,510 men and 92,357 women aged ≥30 years from a private health screening institute in Taiwan. Two IR indexes namely triglyceride-glucose (TyG) index and triglycerides to high-density lipoprotein cholesterol (TG/HDL-C) ratio were used to examine their relationship to predict abnormal liver function parameters (aspartate aminotransferase (AST), alanine aminotransferase (ALT), gamma-glutamyl transferase (GGT), and alkaline phosphatase (ALP)). Results: Positive trend was shown for the association of TyG index in the highest quintile (Q5) and risk of high AST (OR = 1.45, 95% CI: 1.33–1.57), high ALT (OR = 1.85, 95% CI: 1.73–1.97), high GGT (OR = 2.04, 95% CI: 1.93–2.15), and high ALP (OR = 1.13, 95% CI: 1.07–1.19) compared with the median quintile (Q3) in the fully adjusted model. Similarly, participants in the Q5 of the TG/HDL-C ratio were associated with 1.38 (95% CI: 1.27–1.49), 1.71 (95% CI: 1.61–1.82), 1.75 (95% CI: 1.66–1.84), and 1.21 (1.16–1.27) odds for having high AST, ALT, GGT, and ALP respectively. The AUC (95% CI) value of the TyG index for predicting high AST, high ALT, and high GGT was 0.699 (0.692–0.705), 0.738 (0.734–0.742), and 0.752 (0.749–0.755), respectively. Meanwhile, the AUC (95% CI) of the TG/HDL-C ratio for predicting high AST, high ALT, and high GGT was 0.680 (0.673–0.686), 0.738 (0.734–0.742), 0.734 (0.731–0.738), respectively. Conclusions: Our study supported that the TyG index and TG/HDL-C ratio may be useful as non-invasive methods to predict the existence of impaired liver function in the early stage.

scholarly journals Dynamic changes in liver function parameters in patients with coronavirus disease 2019: a multicentre, retrospective study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Qing-Lei Zeng ◽  
Zu-Jiang Yu ◽  
Fanpu Ji ◽  
Guang-Ming Li ◽  
Guo-Fan Zhang ◽  
...  
Keyword(s):  
Retrospective Study ◽  
Liver Disease ◽  
Liver Function ◽  
Chronic Liver Disease ◽  
Chronic Liver ◽  
Gamma Glutamyl Transferase ◽  
Dynamic Changes ◽  
Viral Shedding ◽  
Glutamyl Transferase ◽  
Multicentre Retrospective Study

Abstract Background Liver injuries have been reported in patients with coronavirus disease 2019 (COVID-19). This study aimed to investigate the clinical role played by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Methods In this multicentre, retrospective study, the parameters of liver function tests in COVID-19 inpatients were compared between various time-points in reference to SARS-CoV-2 shedding, and 3 to 7 days before the first detection of viral shedding was regarded as the reference baseline. Results In total, 70 COVID-19 inpatients were enrolled. Twenty-two (31.4%) patients had a self-medication history after illness. At baseline, 10 (14.3%), 7 (10%), 9 (12.9%), 2 (2.9%), 15 (21.4%), and 4 (5.7%) patients already had abnormal alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transferase (GGT), alkaline phosphatase (ALP), albumin, and total bilirubin (TBIL) values, respectively. ALT and AST abnormal rates and levels did not show any significant dynamic changes during the full period of viral shedding (all p > 0.05). The GGT abnormal rate (p = 0.008) and level (p = 0.033) significantly increased on day 10 of viral shedding. Meanwhile, no simultaneous significant increases in abnormal ALP rates and levels were observed. TBIL abnormal rates and levels significantly increased on days 1 and 5 of viral shedding (all p < 0.05). Albumin abnormal decrease rates increased, and levels decreased consistently from baseline to SARS-CoV-2 clearance day (all p < 0.05). Thirteen (18.6%) patients had chronic liver disease, two of whom died. The ALT and AST abnormal rates and levels did not increase in patients with chronic liver disease during SARS-CoV-2 shedding. Conclusions SARS-CoV-2 does not directly lead to elevations in ALT and AST but may result in elevations in GGT and TBIL; albumin decreased extraordinarily even when SARS-CoV-2 shedding ended.

scholarly journals PROTECTIVE ROLE AND ANTIOXIDANT ACTIVITY OF AQUEOUS EXTRACT OF ROSMARINUS OFFICINALIS AGAINST TRICHLOROACETATE-INDUCED TOXICITY IN LIVER OF MALE RATS

2018 ◽  
Vol 11 (6) ◽  
pp. 420
Author(s):  
Medhat Mostafa Abozid ◽  
Hoda Ea Farid
Keyword(s):  
Aqueous Extract ◽  
Liver Damage ◽  
Protective Role ◽  
Rosmarinus Officinalis ◽  
Male Rats ◽  
Control Group ◽  
Albino Rats ◽  
Gamma Glutamyl Transferase ◽  
Group I ◽  
Glutamyl Transferase

 Objective: The current study was designed to estimate the potential protective role of the aqueous extract of rosemary (AER) (Rosmarinus officinalis) against trichloroacetic acid (TCA)-created hepatotoxicity in male albino rats.Methods: Forty male albino rats were separated into four groups of ten: Group I served as control; Group II was given AER (200 mg/kg/day) by gavage; Group III received TCA at the dose 50 mg/kg/day, and Group V was treated with AER (200 mg/kg/day) and received TCA (50 mg/kg/day). The experiment was carried out for 2 months.Results: The toxicity of TCA for rats was revealed by an elevation in liver marker enzymes activities (gamma-glutamyl transferase [GGT], alkaline phosphatase [ALP], aspartate transaminase [AST], alanine aminotransferase [ALT]) and conjugated bilirubin (CB) level, and a decrease in albumin and total protein (TP) levels. The TCA administration also caused a significant increase in the activities of catalase (CAT), glutathione peroxidase (GPx) and superoxide dismutase (SOD), and also malondialdehyde (MDA) level in liver tissues. These biochemical effects were accompanied by histological indicators of liver damage. Treatment with ARE recovered the liver damage instigated by TCA, as showed by perfection of liver enzyme markers (GGT, ALT, AST, ALP), CB, TP and albumin; as well as antioxidant parameters (CAT, SOD, GPx) and lipid peroxidation (MDA) and amelioration of histopathology changes in the liver tissues.Conclusion: It could be concluded that AER supplementation for 2 months in TCA-induced toxicity in rats benefited hepatic antioxidant status and improved liver injury and damage in male albino rats exposed to TCA.

scholarly journals COVID-19 associated variations in liver function parameters: a retrospective study

2020 ◽  
pp. postgradmedj-2020-138930
Author(s):  
Ram Krishan Saini ◽  
Neha Saini ◽  
Sant Ram ◽  
Shiv Lal Soni ◽  
Vikas Suri ◽  
...  
Keyword(s):  
Liver Injury ◽  
Liver Function ◽  
Liver Enzyme ◽  
Inflammatory Markers ◽  
Liver Enzymes ◽  
Tertiary Care ◽  
Abnormal Liver Function ◽  
Gamma Glutamyl Transferase ◽  
Number Of Patients ◽  
Glutamyl Transferase

BackgroundCharacteristics of laboratory findings of COVID-19 patients are of great significance for diagnosis and treatment. Studies that have analysed the variations in hepatic profile in correlation with the inflammatory markers in SARS-CoV-2 are limited.MethodsWe retrospectively analysed liver function tests and inflammatory markers of 170 admitted patients with confirmed COVID-19 in the tertiary care centre, Post Graduate Institute of Medical Education and Research (PGIMER), India, using Roche Cobas Autoanalyzer.ResultsNumber of patients with normal liver enzyme levels were 63 (41.5%), while with raised levels of any of the liver enzymes were 89 (58.5%), out of which 43 (48.31%) had liver injury which manifested as increased severity in terms of intensive care unit (ICU) requirement (p=0.0005). Significantly raised levels of liver enzymes and liver injury were observed with age (p<0.0001) and in males (p=0.004). Significantly decreased levels of albumin and total proteins and increased levels of total bilirubin (p<0.0001) were seen in patients with abnormal liver enzyme levels and liver injury as compared to patients with normal levels. Significant increase in the levels of alanine transaminase and gamma-glutamyl transferase was seen on the 7th day, CRP and ferritin (p<0.0001) peaks were observed on 2nd and 3rd day respectively. A significant positive correlation was found between the levels of these inflammatory markers and liver function parameters.ConclusionsMore than half of patients admitted to the hospital with SARS-CoV-2 infection had an abnormal liver function which was found to be associated with raised levels of inflammatory markers. Significantly higher proportions of patients with abnormal liver function were elderly and males and were at higher risk of progressing to severe disease.

scholarly journals Economic insecurity during the Great Recession and metabolic, inflammatory and liver function biomarkers: analysis of the UK Household Longitudinal Study

2017 ◽  
Vol 71 (10) ◽  
pp. 1005-1013 ◽  
Author(s):  
Claire L Niedzwiedz ◽  
Srinivasa Vittal Katikireddi ◽  
Aaron Reeves ◽  
Martin McKee ◽  
David Stuckler
Keyword(s):  
Liver Function ◽  
Density Lipoprotein ◽  
Hdl Cholesterol ◽  
Glycated Haemoglobin ◽  
Financial Strain ◽  
Gamma Glutamyl Transferase ◽  
Economic Insecurity ◽  
Linear Regression Models ◽  
The Uk ◽  
Glutamyl Transferase

BackgroundEconomic insecurity correlates with adverse health outcomes, but the biological pathways involved are not well understood. We examine how changes in economic insecurity relate to metabolic, inflammatory and liver function biomarkers.MethodsBlood analyte data were taken from 6520 individuals (aged 25–59 years) participating in Understanding Society. Economic insecurity was measured using an indicator of subjective financial strain and by asking participants whether they had missed any bill, council tax, rent or mortgage payments in the past year. We investigated longitudinal changes in economic insecurity (remained secure, increase in economic insecurity, decrease in economic insecurity, remained insecure) and the accumulation of economic insecurity. Linear regression models were calculated for nine (logged) biomarker outcomes related to metabolic, inflammatory, liver and kidney function (as falsification tests), adjusting for potential confounders.ResultsCompared with those who remained economically stable, people who experienced consistent economic insecurity (using both measures) had worsened levels of high-density lipoprotein (HDL)-cholesterol, triglycerides, C reactive protein (CRP), fibrinogen and glycated haemoglobin. Increased economic insecurity was associated with adverse levels of HDL-cholesterol (0.955, 95% CI 0.929 to 0.982), triglycerides (1.077, 95% CI 1.018 to 1.139) and CRP (1.114, 95% CI 1.012 to 1.227), using the measure of financial strain. Results for the other measure were generally consistent, apart from the higher levels of gamma-glutamyl transferase observed among those experiencing persistent insecurity (1.200, 95% CI 1.110 to 1.297).ConclusionEconomic insecurity is associated with adverse metabolic and inflammatory biomarkers (particularly HDL-cholesterol, triglycerides and CRP), heightening risk for a range of health conditions.

Sildenafil, a phosphodiesterase-5 inhibitor, offers protection against carbon tetrachloride-induced hepatotoxicity in rat

2018 ◽  
Vol 29 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Olorunfemi R. Molehin ◽  
Anne A. Adeyanju ◽  
Stephen A. Adefegha ◽  
Oluwasanmi O. Aina ◽  
Blessing A. Afolabi ◽  
...  
Keyword(s):  
Carbon Tetrachloride ◽  
Density Lipoprotein ◽  
Serum Levels ◽  
Selective Inhibition ◽  
Guanosine Monophosphate ◽  
Control Group ◽  
Gamma Glutamyl Transferase ◽  
Protective Agent ◽  
Glutamyl Transferase ◽  
Phosphodiesterase 5

AbstractBackground:Elevation of phosphodiesterase-5 (PDE5) activity converts cyclic guanosine monophosphate (cGMP) to 5′-GMP, a mechanism that could be associated with drug-mediated hepatotoxicity. This study investigated whether selective inhibition of PDE5 by sildenafil could offer protection against hepatotoxicity induced by carbon tetrachloride (CCl4).Methods:CCl4(0.5 mL/kg) was administered intraperitoneally to induce hepatotoxicity. The control group received normal saline. Sildenafil (5 mg, 10 mg, and 20 mg/kg, p.o.) was administered to CCl4-treated rats.Results:CCl4significantly increased the serum levels of gamma glutamyl transferase (γ-GT), alkaline phosphatase (ALP), aspartate aminotransferase (AST), and alanine aminotransferase (ALT) and reduced total protein (TP) (p<0.05). Pretreatment with sildenafil moderately reduced ALP, AST, and ALT activities with modest increase in TP level. CCl4-induced changes in the antioxidant status of the liver were significantly improved by sildenafil, especially at the lowest dose of 5 mg/kg by elevating the levels of reduced glutathione (GSH), glutathione peroxidase (GPx), catalase (CAT), superoxide dismutase (SOD), and glutathione-S-transferase (GST) and preventing lipid peroxidation (p<0.05). Sildenafil did not significantly alter the total cholesterol and triglyceride levels. However, high-density lipoprotein (HDL) level was significantly increased by sildenafil (p<0.05).Conclusions:The results from this study suggest that sildenafil, when used at low doses, may be a useful pharmacological protective agent against CCl4-induced hepatotoxicity.

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