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    Ameliorative Effects of Quercetin on Tartrazine-Induced Hepatotoxicity in Rats: Insights Into Body Weight, Caspase Signaling, Cytokine Storm, Oxidative Stress, and Hepatocellular Proliferation
    (Wiley, 2026) Aylaz, Bulent; Erdemli, Zeynep; Gul, Mehmet; Bulut, Nilufer; Zayman, Emrah; Demirtas, Sezin; Erdemli, Mehmet Erman
    Protective role of Quercetin against the possible harmful effects of Tartrazine, which is widely used. These doses have been studied for the first time in the literature. Rats were divided: Control, Tartrazine, Quercetin, and Tartrazine + Quercetin. The substances were administered for 30 days. Afterward, liver tissues and blood samples were collected and biochemically and histopathologically analyzed. An increase was noted in oxidant (MDA, SOD) and oxidative stress index parameters (TOS, OSI) while decreases were seen in antioxidant parameters (GSH, CAT, TAS), inflammation markers (TNF-alpha, IL-6), apoptosis (Caspase 3) and histopathological deterioration (heterochromatic with pyknotic nuclei, pericentral hepatocyte necrosis, and inflammatory cell infiltration) in liver tissue. There was also an increase in oxidative stress index, inflammation markers, and liver function tests (ALT, AST, ALP, Direct and Total Bilirubin) in serum samples of the tartrazine group. In the quercetin group, antioxidant parameters in liver tissue increased, whereas oxidant parameters, inflammation markers, and liver function tests in serum samples decreased. Improvements in both biochemical, blood, and histopathological parameters were observed with the concomitant administration of quercetin compared to the tartrazine group. Tartrazine caused hepatotoxicity by increasing oxidative stress, inflammation, and apoptosis in the liver tissues. Additionally, it led to widespread damage by elevating inflammation and worsening liver function test results in blood samples. Quercetin, however, showed strong antioxidant, anti-inflammatory, and apoptotic effects. We recommend daily use of quercetin to protect the liver from the harmful effects of tartrazine.
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    Quercetin Exhibits Nephroprotective Properties Against Tartrazine-Induced Nephrotic Injury: Effects on Oxidative Stress, Kidney Function, Inflammation, Renal Tissue Morphology, and Apoptotic Pathway
    (Wiley, 2026) Erdemli, Zeynep; Gul, Mehmet; Bulut, Nilufer; Zayman, Emrah; Demirtas, Sezin; Karaaslan, Ezgi; Erdemli, Mehmet Erman
    We investigated first time in the literature the effects of tartrazine, a common industrial dye, and quercetin, a possible protective, on the kidneys. The rats were randomly assigned to the control, tartrazine, quercetin, and tartrazine + quercetin groups, with each group consisting of eight Wistar albino rats. The trials lasted for 1 month, after which kidney tissues and blood samples were collected. In the tartrazine group, increases were observed in malondialdehyde (MDA), superoxide dismutase (SOD), total oxidant status (TOS), oxidative stress index (OSI), tumor necrosis factor alpha (TNF-alpha), interleukin-6 (IL-6), glomerular diameter and damage, histopathological damage score, glomerular and tubular caspase-3 immunoreactivity H-score, as well as serum urea, uric acid, and creatinine levels in the kidney tissue. Additionally, kidney tissue histopathology and apoptotic deteriorated in the same group. The deteriorated biochemical and histopathological parameters improved with quercetin administration. Tartrazine led to nephrotoxicity in rats, as indicated by kidney tissue oxidant capacity, inflammation, apoptosis, increased kidney function tests, and deterioration in histopathology. Quercetin exhibited strong antioxidant, antiapoptotic, and anti-inflammation activity and can be used as a protective agent against tartrazine-induced nephrotoxicity.