Abstract
In the present study, poncirin was evaluated against paracetamol-induced liver injury using in vivo and computational approaches. Paracetamol was administered intraperitoneally (i.p,) to establish liver injury in mice and, subsequently, to investigate the hepatoprotective effect of poncirin (administered intraperitoneally) on liver injury. The effect of poncirin was evaluated against the liver injury markers and inflammatory cytokines. Similarly, in the present study, the antioxidants and oxidative stress parameters were also assessed following paracetamol-induced liver injury. The histological studies following liver injury were also assessed using H and E staining, Masson's trichrome staining, and periodic acid-Schiff staining. Similarly, the computational approach was used to assess the pharmacokinetic parameters of poncirin and its interaction with various protein targets. Poncirin markedly improved the antioxidant enzymes while attenuated the oxidative stress markers and inflammatory cytokines. Poncirin also markedly improved hematological parameters. Furthermore, poncirin treatment significantly improved the histological parameters using H and E staining, Masson's trichrome, and PAS staining compared to the control. Poncirin treatment also improved the liver function tests and liver synthetic activity compared to paracetamol treated group. The immunohistochemistry analysis revealed significant decrease in the inflammatory signaling protein such as nuclear factor kappa light chain enhancer of activated B cells (NF-κB), Jun N-terminal kinase (JNK), and cyclooxygenase-2 (COX-2) expression level compared to the paracetamol treated group. Computational analysis (molecular docking and molecular dynamic simulation) showed significant binding affinity of poncirin with the NF-κB, JNK, COX-2, IL-1β, IL-6, and TNF-α via multiple hydrophilic and hydrophobic binds. Similarly, the SwissADME software revealed that poncirin follows various drug-likeness rules and exhibited better pharmacokinetic parameters. Poncirin improved the sign and symptoms associated with liver injury using both in vivo and computational approaches.
Highlights
The Paracetamol is widely used antipyretic and considered usually safe at therapeutic doses i.e. the dose up to 4 gram per day is well tolerated, greater than recommended dose can trigger hepatotoxicity (Pradhan and Girish 2006)
At toxic doses the cytochrome p450 system and glutathione is saturated with resultant accumulation of the NAPQI and subsequent binding with the cellular protein as well as necrosis
The Poncirin effect was evaluated on the various parameters such as body weight variation, liver weight variation, survival rate and food intake following Paracetamol-induced liver injury
Summary
The Paracetamol is widely used antipyretic and considered usually safe at therapeutic doses i.e. the dose up to 4 gram per day is well tolerated, greater than recommended dose can trigger hepatotoxicity (Pradhan and Girish 2006). The Paracetamol is metabolized primarily conjugation reaction such as glucuronidation and sulphonation, while 30–55 % of the Paracetamol is excreted in urine as conjugated form (Jóźwiak-Bebenista and Nowak 2014). The small amount of Paracetamol is metabolized microsomal cytochrome p450 enzymes system and result into the formation of the N-acetylp-benzoquinone (NAPQI) electrophilic intermediate which is inactivated by the glutathione (JóźwiakBebenista and Nowak 2014). At toxic doses the cytochrome p450 system and glutathione is saturated with resultant accumulation of the NAPQI and subsequent binding with the cellular protein as well as necrosis These pathological changes results into jaundice, decreased synthetic capacity, bilirubin accumulation and fulminant hepatic dysfunction (Ullah Khan et al 2018; Khan et al 2020). These pathological changes might involve the generation of reactive oxygen and nitrogen species (RONS)
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