The possible protective effects of naringenin, a naturally occurring citrus flavonone, on carbon tetrachloride (CCl4 )-induced liver injury in rats and the mechanism underlying its effects were investigated. Forty rats were divided into five groups. Rats in Groups I and II served as the normal and injured liver groups, respectively; Group III rats were treated with the standard drug silymarin as a positive control; and rats in Groups IV and V (naringenin-treated groups) were administrated 50 mg/kg, p.o., naringenin for 7 days. Liver samples were collected to evaluate mRNA and protein expression, histological changes and oxidative stress. Naringenin inhibited lipid peroxidation and reduced serum levels of hepatic enzymes induced by CCl4 . In addition, naringenin increased the liver content of reduced glutathione and the activity of anti-oxidant enzymes in rats treated with CCl4 . Naringenin attenuated liver inflammation by downregulating CCl4 -induced activation of tumour necrosis factor (TNF)-α, inducible nitric oxide synthase (iNOS) and cyclo-oxygenase (COX-2) at both the protein and mRNA levels. Naringenin treatment significantly increased NF-E2-related factor 2 (Nrf2) and heme oxygenase (HO-1) expression in injured livers. In rats treated with CCl4 alone, decreases were seen in nuclear Nrf2 expression and in the mRNA levels of its target genes (e.g. HO-1, NQO1 and glutathione S-transferase alpha 3 (GST-a3)). Together, the results suggest that naringenin can protect the liver against oxidative stress, presumably by activating the nuclear translocation of Nrf2 as well as attenuating the TNF-α pathway to elicit an anti-inflammatory response in liver tissue.
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http://dx.doi.org/10.1111/1440-1681.12230 | DOI Listing |
Background: The mechanism underlying chronic drug-induced liver injury (DILI) remains unclear. Immune activation is a common feature of DILI progression and is closely associated with metabolism. We explored the immunometabolic profile of chronic DILI and the potential mechanism of chronic DILI progression.
View Article and Find Full Text PDFAnimals (Basel)
December 2024
Key Laboratory of Bio-Resources and Eco-Environment (Ministry of Education), College of Life Sciences, Sichuan University, Chengdu 610065, China.
Ulcerative colitis (UC) is an inflammatory disease of the intestinal mucosa, and its incidence is steadily increasing worldwide. As a traditional Chinese medicinal insect, has been broadly utilized in clinical practice to treat wound healing. The tryptophan (Trp), tryptamine (Try), and 1,2,3,4-tetrahydrogen-β-carboline-3-carboxylic acid (Thcc) identified from concentrated ethanol-extract liquid (PACEL) exhibit significant cell proliferation-promoting and anti-inflammatory effects in the treatment of UC, but the mechanism involved remains obscure.
View Article and Find Full Text PDFCells
December 2024
Airway Disease Section, Department of Otorhinolaryngology, Kansai Medical University, Hirakata, Osaka 573-1010, Japan.
Eosinophilic chronic rhinosinusitis (ECRS), a CRS with nasal polyps (CRSwNP), is characterized by eosinophilic infiltration with type 2 inflammation and is highly associated with bronchial asthma. Intractable ECRS with poorly controlled asthma is recognized as a difficult-to-treat eosinophilic airway inflammation. Although eosinophils are activated and coincubation with airway epithelial cells prolongs their survival, the interaction mechanism between eosinophils and epithelial cells is unclear.
View Article and Find Full Text PDFZhong Nan Da Xue Xue Bao Yi Xue Ban
August 2024
Department of Nephrology, Second Xiangya Hospital, Central South University, Changsha 410011.
Objectives: IgA nephropathy (IgAN) is the most common primary glomerular disease in China, but its pathogenesis remains unclear. This study aims to explore the regulatory role of the mammalian target of rapamycin (mTOR) signaling pathway in autophagy and mesangial proliferation during renal injury in IgA.
Methods: The activity of mTOR and autophagy was evaluated in kidney samples from IgAN patients and in an IgAN mouse model induced by oral bovine serum albumin and carbon tetrachloride (CCl4) injection.
Placenta
January 2025
Department of Obstetrics and Gynecology, Affiliated Xiaoshan Hospital, Hangzhou Normal University, Hangzhou, Zhejiang, 311200, China. Electronic address:
Introduction: Pre-eclampsia (PE) is a pregnancy complication featuring hypertension and proteinuria. Metformin exerts clinically preventive effects on PE with an unspecified mechanism.
Methods: Placental tissues from PE patients and normal pregnant (NP) women were collected.
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