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Experimental model of oral ulcer in mice: Comparing wound healing in three immunologically distinct animal lines.
Journal of Oral and Maxillofacial Pathology : JOMFP 2018 September
Background: The oral wound healing is dependent of immune participation and the absence or augment of one specific immune profile can delayed wound healing.
Objectives: So, the objective of this study was t evaluate the wound healing of oral traumatic ulcer (OTU) in cheek mucosa of swiss, balb/c and c57bl6J mice.
Materials and Methods: A total of 144 mice (25-30g) were distributed in three groups: swiss ( n = 48), balb/c ( n = 48) and c57bl/6j ( n = 48). An OTU was performed using a dermatological punch in left cheek mucosa. The animals were euthanized daily ( n = 6/group/day by 8 days) for evaluation of the ulcer area, weight loss and histological analysis.
Results: There are no differences between ulcer area in three groups; however only swiss group showed total wound healing. Swiss group showed weight loss in 2nd and 3rd days recovering the body mass in 4th day ( P < 0.01). Balb/c group showed the greater weight loss ( P < 0.05) and c57bl/6j did not show body mass variation ( P = 0.258). Histologically swiss group was the only group that showed total reepithelization ( P < 0.001). Balb/c ( P = 0.022) and c57bl/6j ( P < 0.001) showed decrease in histological scores, chronic inflammation on the 8th day. Actinomyces was significantly more observed in surface of OTU of balb/c.
Conclusion: Balb/c mice showed high infection of OTU surface delaying wound healing, and greater weight loss. C57bl/6J mice showed low infection of OTU, but not healing along the eight days. Only the Swiss mice showed wound healing of OTU.
Objectives: So, the objective of this study was t evaluate the wound healing of oral traumatic ulcer (OTU) in cheek mucosa of swiss, balb/c and c57bl6J mice.
Materials and Methods: A total of 144 mice (25-30g) were distributed in three groups: swiss ( n = 48), balb/c ( n = 48) and c57bl/6j ( n = 48). An OTU was performed using a dermatological punch in left cheek mucosa. The animals were euthanized daily ( n = 6/group/day by 8 days) for evaluation of the ulcer area, weight loss and histological analysis.
Results: There are no differences between ulcer area in three groups; however only swiss group showed total wound healing. Swiss group showed weight loss in 2nd and 3rd days recovering the body mass in 4th day ( P < 0.01). Balb/c group showed the greater weight loss ( P < 0.05) and c57bl/6j did not show body mass variation ( P = 0.258). Histologically swiss group was the only group that showed total reepithelization ( P < 0.001). Balb/c ( P = 0.022) and c57bl/6j ( P < 0.001) showed decrease in histological scores, chronic inflammation on the 8th day. Actinomyces was significantly more observed in surface of OTU of balb/c.
Conclusion: Balb/c mice showed high infection of OTU surface delaying wound healing, and greater weight loss. C57bl/6J mice showed low infection of OTU, but not healing along the eight days. Only the Swiss mice showed wound healing of OTU.
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