The effects of N-acetylcysteine and vitamin C on liver and pulmonary tissue damage in rats following bile duct ligation

WOS: 000262345300008PubMed: 18998004Objective: To evaluate the effects of N-acetylcysteine (NAC) and vitamin C on pulmonary histological alterations in bile duct-ligated (BDL) rats. Methods: The current study was conducted in the Department of Pediatric Surgery, Medical School of Abant Izzet Baysal University Bolu, Turkey between May 2007 and July 2007. Thirty-five males Sprague-Dawley rats, weighing 210-240 grams, were used. Group I rats (n=7) underwent only laparotomy. Group 2 rats (n=7) were subjected to BDL. Group 3 rats (n=7) were subjected to BDL and given vitamin C. Group 4 rats (n=7) were subjected to BDL and given NAC. Group 5 rats (n=7) were subjected to BDL and received NAC plus vitamin C. At the end of the 3 week period, biochemical and histological evaluations were processed. Results: Total bilirubin values were decreased in group 5 compared to group 2, 3, and 4. Group 2 showed massive interstitial infiltration with inflammatory cells. Interstitial edema, focal cuboidal metaplasias of alveolar lining cells, and severely damaged pulmonary architecture were noted. Treatment of rats with NAC and vitamin C produced a significant reduction in the histopathological score compared to groups 2, 3, and 4. Conclusions: The combination of NAC and vitamin C reduced lung histological alterations in BDL rats with afforded by each drug individually

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Effect of Pregnancy on Vocal Cord Histology: An Animal Experiment

Background: Voice may be affected during the period of pregnancy, especially in the third trimester. However, the exact mechanisms leading to the phonatory changes have not yet uncovered. Study Design: Animal experiment. Methods: Twenty-five Wistar-Albino female rats were divided into four groups: control group, pregnancy day 7 (Group 1), pregnancy day 14 (Group 2) and pregnancy day 20 (Group 3). The laryngeal specimens were obtained under general anesthesia. Histological assessment was performed using Hematoxylin-eosin and toluidine blue. A stereological analysis of vocal cord tissue was performed using a NISElements D32 Imaging Software. Results: Lamina propria was observed to be edematous, and the lamina propria area was thickened starting from the second trimester. Glycosaminoglycans were observed to increase in the second trimester. Although none was encountered in the control, mast cells were observed in the lamina propria layer of the vocal cord starting in the muscular layer in the first trimester proceed to the subepithelial region as degranulated just before term. The covering epithelium remained unchanged throughout pregnancy. Conclusion: Lamina propria thickening may be attributed to both edema and increased glycosaminoglycans. The presence of mast cells in the cordal tissue may induce edema during pregnancy in rats

Effect of platelet-rich plasma on tendon-to-bone healing after rotator cuff repair in rats: an in vivo experimental study

Objective: The purpose of this experimental study was to analyze the effects of local autologous platelet-rich plasma (PRP) injection on tendon-to-bone healing in a rotator cuff repair model in rats

The effect of rhododendron honey on mice liver tissue [Efecto de la miel de rododendro en el tejido hepático de ratón]

Rhododendron honey, made by bees from rhododendron pollen, contains a toxic substance called grayanotoxin. Depending on the dose, the poisonous honey can result in serious effects such as cardiac arrhythmia, fibrillation, and myocardial infarction. The purpose of this study is to investigate the effects of the poisonous RH of the Black Sea Region on the liver. Male mice were divided into five groups of twelve mice each, two being the control groups (distilled water) and the others being the rhododendron honey (RH) groups (25, 50, and 75 mg/kg) and 0.01 mg/kg grayanotoxin (GTx) groups. Liver tissues were collected 24 and 48 h later. The sections were stained with hematoxylin, eosin and PAS, then the histopathological score was performed. Significant statistical differences were observed between the RH and control groups in terms of congestion, steatosis, sinusoid dilatation, and inflammation. The control group demonstrated a normal liver structure in the light microscopy, while the GTx-applied 24 h group exhibited expansions in the sinusoids and congestion. Higher levels of congestion, steatosis, and inflammatory cells were seen in the GTx-applied 48 h group. In the same group, giant cells consisting of many nuclei were observed in the sinusoids. The results of the 25 mg RH-applied groups were similar in 24 and 48 h, histopathological score levels were increased slightly, congestion and steatosis were prominent in the 48 h group. Dense steatosis was seen in the hepatocytes around the vena centralis in 50 mg/kg RH-applied 48 h group. Congestion, steatosis and an increase in inflammatory cells were observed in the hepatocytes in the 75 mg/kg RH-applied 24- and 48 h groups. PAS (+) stained hepatocytes were decreased in the RH- and GTx-applied groups. The toxic effects of the rhododendron honey were observed in the mice liver tissue with respect to dose and time. © 2016, Universidad de la Frontera. All rights reserved