L-arginine pretreatment ameliorates Lipopolysaccharide-induced thyroid gland dysfunction in male albino rats | ||||
| SVU-International Journal of Veterinary Sciences | ||||
| Article 4, Volume 4, Issue 2 - Serial Number 8, June 2021, Page 35-50 PDF (1.04 MB) | ||||
| Document Type: Research article | ||||
| DOI: 10.21608/svu.2021.60533.1104 | ||||
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| Authors | ||||
basma osama mohamed   1; Hamdy M. Embark Embark2
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| 1physiology department, faculty of veterinary medicine, Aswan university, Aswan, Egypt. | ||||
| 2Animal Physiology Department, Faculty of Veterinary Medicine, South Valley University, Qena 83523, Egypt | ||||
| Abstract | ||||
| Bacterial infection is one of the most common causes of systemic inflammatory syndrome known as sepsis. Previous studies have been shown that sever sepsis was often complicated with secondary multiple organs dysfunction. This syndrome may greatly affect thyroid gland function leading to thyroid gland dysfunction. The objective of this study was to elucidate the effect of bacterial endotoxin (lipopolysaccharide, LPS) on thyroid gland function. The study extended to investigate the role of L-arginine (L-Arg) as immunomodulator in LPS-induced systemic inflammation. Eighty adults, male Wistar rats were randomly divided into four equal groups: The control group was intraperitoneally (IP) injected with physiological sterile saline (0.9% NaCl at dose 1 ml/kg body weight (BW)); LPS-treated group was injected with a single dose of LPS (1 mg/kg BW, IP); L-Arg-treated group was injected with L-Arg (10 mg/kg BW, IP) once per day for 7 consecutive days; and L-Arg + LPS treated group was injected with L-Arg (10 mg/kg BW, IP) once per day for 7 consecutive days followed by a single dose of LPS (1 mg/kg BW, IP). Histopathological changes of thyroid gland, serum triiodothyronine (T3), thyroxine(T4), and thyroid stimulating hormone (TSH) levels were examined at 6, 12, 24 and 72 hours (h) after the last injection. Treatment of rats with a single dose of LPS alone resulted in thyroiditis which manifested by decreased serum T3 and T4 levels and severe necrosis of the thyroid follicles. However, in L-Arg-treated endotoxemic rats, pretreatment with L-Arg attenuated the LPS-induced acute thyroid gland injury. | ||||
| Keywords | ||||
| L-arginine; lipopolysaccharide; T3; T4; TSH | ||||
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