Effects of Sodium Benzoate and Citric Acid on Serum, Liver and Kidney Tissue Total Sialic Acid Levels: An Ultrastructural Study

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  • Elvan BAKAR
  • Tülin AKTAÇ


sialic acid, citric acid, sodium benzoate, liver, kidney


In this study, it was aimed to investigate the morphologic effects of sodium benzoate (SB) and citric acid (CA) , additives used in food,
on rat liver and liver tissues and changes in total sialic acid (TSA) levels. A total of 30 Wistar albino rats weighing 200-250 gr were divided
to 3 groups with 10 in each. Rats in control group, SB group and CA group were administered on by gavage tap water, Na-benzoate (2442
mg/kg body weight) and citric acid (576 mg/kg body weight) once daily respectively for 10 days. At the end of the experiment, animals in
control and experiment groups were opened and heart blood, hepatic and renal tissues were obtained. Removed tissues were examined under
light and electron microscopy following routine follow up procedures. TSA amounts in serum and tissues were measured with
spectrophotometric method. In SB and CA groups, disruption was observed in hepatic tissue engineering, vacuolization was observed in
hepatocytes and also pyknotic nuclei, nucleus losses and hypertrophy were observed. In SB and CA groups, pyknotic nuclei were observed in
renal tubular cells, membrane injury was observed in apical and basal surfaces of tubular cells, degeneration was observed in glomerular
structures and irregularity was seen in tubular structures. Plasmarhexis, losses in mitochondrial crista, degeneration in outer membrane and
nuclear membrane of mitochondria, vacuolization in hepatocytes and myelin figures were observed electromicroscopically due to SB and
CA. In renal tissues, electronmicroscopic degenerative changes included electron-dense granules, crista losses in mitochondria, irregular
microvilli, vacuolization and plasmarhexis in cytoplasma of tubular cells, irregularity in chromatin material, disruption in basal membrane,
enlargement in ER sacs. In SB groups, serum TSA amount was seen to decrease significantly (p<0.05) and a significant difference was not
seen in CA group. It was seen that sialic acid amounts significantly decreased both in liver and kidney tissues in SB group (p<0.0001); in CA
group, while a significant difference was not seen in hepatic tissues, renal TSA level was detected to increase significantly (p<0.0001).
When effects of SB and CA on TSA amount and morphologic degenerations in liver and renal kidney were evaluated together, we consider that more detailed studies are required about the use of these food preservatives




How to Cite

BAKAR, E., & AKTAÇ, T. (2019). Effects of Sodium Benzoate and Citric Acid on Serum, Liver and Kidney Tissue Total Sialic Acid Levels: An Ultrastructural Study. Journal of Applied Biological Sciences, 8(2), 09–15. Retrieved from https://jabsonline.org/index.php/jabs/article/view/392




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