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 Table of Contents  
BRIEF COMMUNICATION
Year : 2022  |  Volume : 13  |  Issue : 1  |  Page : 65

Hepato-Protection effect of curcumin against methylphenidate-induced hepatotoxicity: Histological and biochemical evidences


1 Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
2 Chronic Respiratory Disease Research Center(CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
3 Herbal and traditional medicines research center, Kerman university of medical sciences, Kerman, Iran
4 School of Pharmacy-International Campus, Iran University of Medical Sciences, Tehran, Iran
5 Razi Drug Research Center, Iran University of Medical Sciences; Departemnt of Pharmacology, School of Medicine, Iran University of Medical Sciences, Tehran, Iran

Date of Submission28-Jul-2020
Date of Acceptance22-Sep-2021
Date of Web Publication08-Apr-2022

Correspondence Address:
Majid Motaghinejad
Chronic Respiratory Disease Research Center(CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran
Iran
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijpvm.IJPVM_435_20

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  Abstract 


Keywords: Curcumin, hepatoprotective, methylphenidate


How to cite this article:
Ahmadinasab H, Motaghinejad M, Nosratabad BA, Bozorgniahosseini S, Rostami P, Jafarabadi GS, Motevalian M. Hepato-Protection effect of curcumin against methylphenidate-induced hepatotoxicity: Histological and biochemical evidences. Int J Prev Med 2022;13:65

How to cite this URL:
Ahmadinasab H, Motaghinejad M, Nosratabad BA, Bozorgniahosseini S, Rostami P, Jafarabadi GS, Motevalian M. Hepato-Protection effect of curcumin against methylphenidate-induced hepatotoxicity: Histological and biochemical evidences. Int J Prev Med [serial online] 2022 [cited 2022 May 19];13:65. Available from: https://www.ijpvmjournal.net/text.asp?2022/13/1/65/342760




  Introduction Top


Methylphenidate (MPH) is a neuronal stimulant commonly used in the treatment of hyperactive children.[1] MPH prevents the reuptake of dopamine and norepinephrine into presynaptic terminals and has similar properties to cocaine and methamphetamine, which render it a high-risk drug for substance abuse and dependency.[2],[3] Previous studies have indicated that chronic MPH abuse can cause oxidative stress, inflammation, and apoptosis, and can trigger organ damage and multiple forms of cell dysfunction in multiple organs.[4],[5],[6] One of the main and strategic organs that can be targeted at abusing drugs, particularly MPH, is the liver.[4],[7] The hepatocellular damage caused by MPH was previously established.[4],[8] On the other hand, the use of novel hepatoprotective compounds for the treatment of substance abuse mediated haptic damage and has increased delightfully in the recent times.[9],[10] Curcumin is one of these compounds whose haptoprotective function is confirmed.[10] Curcumin (diferuloyl methane), the most common component of turmeric, is extracted from the Curcuma longa plant rhizomes.[11] This non-nutritive yellow pigment has significant medicinal importance and a cell defense capability.[12],[13] Curcumin has been shown to cause antioxidant, anti-inflammatory, anti-apoptotic, and immunomodulatory effects in the liver function dysfunction.[14],[15] Curcumin's defensive effects against drug abuses caused organ damage as previously identified.[10] However, its effects on MPH-induced organ damage, especially MPH-induced hepatotoxicity, have not yet been explained. The purpose of this research is, therefore, to study the effects of curcumin on MPH-induced hepatocellular injury. Therefore, this research was planned to investigate the in vivo position of curcumin in the defense of rat hepatic tissue cells against MPH-induced cell density and cell-shape reduction and also MPH-induced changes in the liver function of the main enzyme.


  Methods Top


Animals

Seventy male adult Wistar rats (about 8 weeks old) weighing 200 ± 8.0 g were obtained from the Pasteur Institute of Iran (Tehran, Iran) and were transferred to the laboratory. The animals were acclimated to experimental conditions (12 h light-dark cycle, 24°C) for 2 weeks and had free access to standard food and tap water. The male rats are typically less affected by physiological hormonal and biochemical fluctuations, so, as in all related experimental studies, the male rats were used in this study. The current study was performed according to the guidelines for the care and use of laboratory animals published by the US National Institutes of Health (NIH Publication No. 85–23, revised 1996). The experimental protocol was approved by the Research Council of Iran University of Medical Sciences, Tehran, Iran. The number of the letter for the approval of the protocol of this research by the Research Ethics Committee of Iran University of Medical Sciences is 99/D/105/4160.

Drug

Curcumin was purchased from Sigma-Aldrich (USA) (Cat. No.G0062890) and dissolved in normal saline for administration. MPH was obtained from Shfayab-Gostar (Tehran, Iran). The drugs were freshly prepared just before use and the volume was adjusted to 0.7 mL/rat.

Experimental design

Sixty adult male rats were assigned to one of the following groups:

  • Group 1 (control) treated with normal saline (0.7 mL/rat, i.p.) for 21 days
  • Group 2 (MPH-treated group) treated with MPH (10 mg/kg) for 21 days
  • Groups 3, 4, 5, and 6 treated concurrently with MPH (10 mg/kg) and curcumin (10, 20, 40, and 60 mg/kg, i.p., respectively) for 21 days
  • Group 7 received curcumin alone (60 mg/kg, i.p.) dissolved in normal saline for 21 days.


It should be remembered that due to the fact that curcumin is insoluble in water, curcumin was first dissolved in a very limited amount of alcohol (as curcumin solvent), and then, it was prepared to have adequate volume, with normal saline, for injections. It is worth noting that curcumin was first administered in these groups and that MPH was administered after 1 h. The dose of MPH for the initiation of hepatotoxicity and the dose of curcumin for hepatoprotection in animal studies are also selected according to the earlier studies.[7],[8],[12],[16]

On day 22, the livers were collected. The hepatic function test main enzyme levels such as AST, ALP, and histology of liver tissue (ALT), and alkaline phosphatase (ALP) were examined in the blood samples. Histopathological changes and cell density changes in the liver tissue were also been analyzed.[12],[17],[18],[19],[20]

Measurement of AST, ALT, and ALP levels in blood samples

Aspartate aminotransferase (AST), ALT, and ALP were assayed using the method of the earlier studies.[21],[22]

Histological studies

Processing and staining of the liver tissue were conducted using the procedure used in the previous studies.[23],[24]

Statistical analysis

All data were statistically analyzed using the Graph Pad PRISM software (version 6). The data were expressed as the mean ± standard error of the mean (SEM). Variations between control and treatment groups were assessed using one-way Analysis of Variances (ANOVA). The differences between the parameters and their value in the groups were evaluated by the Dunnett post hoc test. P < 0.05 or P < 0.001 was considered statistically significant.


  Results Top


The effects of various doses of curcumin on MPH-induced elevated AST, ALT, and ALP

MPH markedly enhanced the blood levels of AST, ALT, and ALP in comparison with the control group (P < 0.001) [Figure 1]a, [Figure 1]b, [Figure 1]c. In addition, curcumin (40 and 60 mg/kg) decreased MPH-induced increase in AST, ALT, and ALP levels and this effect was statistically important compared to the MPH-treated groups (P < 0.001) [Figure 1a–c]. Also, in animals treated with curcumin (60 mg/kg) alone, there was a decline in AST, ALT, and ALP, but these changes did not vary significantly from those in the control group [Figure 1]a, [Figure 1]b, [Figure 1]c.
Figure 1: Effect of MPH administration and MPH in combination with various doses of curcumin (10, 20, 40, and 60 mg/kg) on liver AST (a), ALT (b), and ALP (c) activity in rats. *** P < 0.001 vs. MPH (10 mg/kg) group. ### P < 0.001 vs. control group. MPH: Methylphenidate

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Histological studies

Tissue portions of the MPH-treated groups had a significant decline of hepatocyte cells relative to the control group. Curcumin (40 and 60 mg/kg) therapy, on the other hand, greatly increased the cell density in the liver tissue. Degenerated shrunken dark cells with condensed nucleus with vacuolization in the liver tissue were found in the liver isolated from MPH treated group [Figure 2] while treatment with curcumin (40 and 60 mg/kg) efficiently preserved the cell architecture [Figure 2]. Also, in the animals treated with curcumin (60 mg/kg) alone, the density and form of the bot cells did not vary significantly from that of the control group [Figure 2].
Figure 2: Representative images of hematoxylin eosin-stained hepatocyte. (a) Control group, (b) MPH (10 mg/kg) group, (c-f) MPH in combination with various doses of curcumin (10, 20, 40, and 60 mg/kg) and curcumin (60 mg/kg) alone (g). Arrows indicate the vacuolation and degeneration in hepatocytes (magnification X400, scale bar 100 μm)

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  Discussion Top


The current studies have indicated that chronically administered MPH (10 mg/kg) induces a rise in the AST, ALT, and ALP levels and induces degeneration changes in histopathology, whereas curcumin administration at doses of 40 and 60 mg/kg reduced the elevation of MPH-induced hepatic enzyme and inhibited histopathological degeneration in MPH-treated groups. Earlier studies have shown that chronic abuse and/or administration of MPH in adult and juvenile subjects contributes to organ damage.[4],[5],[6] According to this research MPH can trigger multiple organ damage. A number of studies have been performed in relation to the brain effects of this drug[4],[5],[6] and some others have explained its malicious effects on the liver.[7],[8] Although its molecular mechanism effects have somehow been clarified in the brain cells, its molecular mechanism effects on other organs, particularly the liver, have not yet been clarified and the evidence in this way is minimal.[4],[5],[6],[25] In this regard, the present study suggested that the administration of MPH substantially raised the serum levels of AST, ALT, and ALP enzymes compared to the control group and also induced substantial hepatocellular histopathological changes compared to the control group. These sections of the data were consistent with the previous data showing that MPH can trigger inflammatory disorders that cause injury to the hepatocellular tissue,[4],[8] And other related studies have shown that MPH can trigger AST and ALT serum levels to support its hepatotoxic effects.[7] Despite these evidence on the impact of MPH on hepatocellular activity, the actual mechanism of action of MPH in this regard remains uncertain.[4],[7],[8] However, it appears that MPH triggers the degradation of the hepatic cell membrane and rises in oxidative stress, inflammation, and apoptosis, thus, releasing hepatocyte cytosomal enzymes and eventually increasing their serum level, but this statement has not yet been fully authorized.[26],[27] Necrosis or cell membrane damage may lead to the release of these enzymes into the blood. However, the serum concentration of these enzymes is related to liver performance.[26]

During the last year, the use of such protective agents to monitor the sequel to substance abuse-caused organ damage has increased significantly.[9],[10] Curcumin is one of these agents whose protective effects, in particular its hepatoprotective functions, have been illustrated in multiple studies, but its effects against MPH-induced hepatotoxicity remain uncertain, so the current research has tried to explain this. Curcumin in (40 or 60 mg/kg) administration can inhibit rises in serum levels of AST, ALT, and ALP enzymes, as well as inhibition of hepatocellular histopathological damage occurring in the MPH-treated rats. It was also found that curcumin alone (60 mg/kg) did not affect the levels of AST, ALT, and ALP and histology of liver tissue, suggesting the protective effects of curcumin against the toxicity caused by MPH; on the other hand, Curcumin hepatoprotective effects were done in the MPH presence. This data section is similar to previous findings, which indicate the curcumin potential in reversing damaged hepatocyte degeneration in chronic multiple disorders by down-regulation of apoptosis, oxidative stress, and inflammation.[9],[27] Curcumin's heptoprotective function in multiple situations of hepatocellular damage has been indicated in prior experimental and clinical research, but its effects against MPH-mediated hepatotoxicity have not yet been indicated. These novel findings provide new insight into the effects of curcumin on hepatocellular harm caused by MPH and the use of this novel therapeutic agent against hepatotoxicity induced by MPH and other organ damage. The current study also has restrictions. The present study has shown hepatoprotective effects of curcumin against hepatotoxicity induced by MPH, but due to budget and other limitations, its mechanism of action and signaling pathways and also its impact on other biochemical and physiological parameters like lipid profiles are not evident. Also, the capacity of curcumin in reversing damaged hepatocyte degeneration in chronic administration of MPH or abuse through down-regulation of apoptosis, oxidative stress, and inflammation, and other molecular and signaling pathways requires to be evaluated which can be considered in the forthcoming studies and research programs.


  Conclusion Top


For the first time, the current research indicates that curcumin therapy decreases MPH-induced liver dysfunction. Curcumin can also be useful as a therapeutic agent to minimize deficits and hepatotoxicity induced by MPH abuse and other possible cytotoxic agents. However, further research on human dosage and toxicity is required.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
  References Top

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    Figures

  [Figure 1], [Figure 2], [Figure 1], [Figure 2]



 

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