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The Effect of Infra-Red Laser Irradiation on Wound Healing in Hamsters
141:4, 2009
ESVP/ECVP Proceedings 2009
301
93
94
GIANT MITOCHONDRIA IN PANCREATIC ACINAR CELLS OF ALLOXAN-INDUCED DIABETIC RATS T. Sano, K. Ozaki, T. Matsuura and I. Narama Department of Pathology, Faculty of Pharmaceutical Sciences, Setsunan University, Nagaotoge-cho, Hirakata, Japan Introduction: The pathomorphological features of eosinophilic granules encountered in pancreatic acinar cells of alloxan-induced diabetic rats were investigated. Materials and Methods: Diabetes was induced in five male F344 rats by single intravenous dosing with 35 mg/kg of alloxan at 6 weeks of age. Rats were killed after 25 weeks. Results: Histologically, pancreatic acini were diffusely atrophic with loss of islets. Eosinophilic granules of varying size were observed in the basal area of acinar cells and did not stain by periodic acid-schiff, Alcian blue, oil red O and Sudan III. Ultrastructurally, giant granules corresponding to eosinophilic granules were surrounded by double membranes with irregular cristae. Small zymogen granules with low electron density accumulated near the lumen, and a large number of small lipid droplets were present at the basal area. Immunohistochemical analysis of prohibitin, a protein located in the mitochondrial inner membrane, was partially positive in the marginal area of some eosinophilic granules, but negative in the central areas. A positive reaction for succinate dehydrogenase, one of the mitochondrial enzymes, showed similar localization to prohibitin by enzyme histochemistry. Conclusions: These findings confirmed that the eosinophilic granules in the exocrine pancreas of alloxan-induced diabetic rats were giant mitochondria.
THE EFFECT OF INFRA-RED LASER IRRADIATION ON WOUND HEALING IN HAMSTERS A. Nasirian *, N. Nasirian y, A. Lazar z and H. Azarabadx *Department of Surgery, Faculty of Specialized Veterinary Science, Science and Research Branch, Islamic Azad University, Tehran, yDepartment of Pathology, Specialized Sina Hospital, Ghazvin University of Medical Science, Ghazvin, z Veterinary LASER Institute, Tehran and xDepartment of Pathology, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran Introduction: Acceleration of the wound healing process after surgical incision is important in cosmetic surgery. In this study, the effect of infra-red (IR) laser therapy on vascular growth and fibroblast proliferation in hamsters was evaluated. Materials and Methods: Thirty male and female adult Syrian hamsters were selected randomly. Under general anaesthesia, a 1 cm incision was made on the back and sutured with a simple interrupted pattern. Animals were divided into two groups (n 5 15; experimental and control). The laser group (experimental) was treated with Mustank IR laser (0.5 J/cm2) for 1 min for 6 days. Biopsies were taken at 48 h and on days 5 and 10. Statistical analysis was undertaken with software version 13.0. The Kolmogrov-Smirnov, Mann Whitney U and T tests were used. Results: The mean number of vessels in the experimental animals was significantly higher than control at 48 h. There was a significant difference between the two groups with regard to vascular growth on day 5. Fibroblast growth was more prominent in the experimental group in comparison with the control group. On day 10, the growth of fibroblasts was higher in the experimental group compared with controls. Conclusions: The rate of wound healing in the control group was slower than in the IR laser irradiation group. Fibroplasia and angiogenesis differed significantly between the groups. The use of IR laser irradiation accelerates wound healing in hamsters.
95 VAGINAL LEIOMYOSARCOMA IN A PREGNANT DAIRY COW N. Hossein, K. Iraj and M. Bonyadian Department of Pathobiology, School of Veterinary Medicine Introduction: Tumours of the ruminant female reproductive tract are rare. An estimated 10 e 50% of such tumours are of smooth muscle origin, of which approximately 10% are considered malignant. Leiomyosarcomas in these species are reported to display a growth pattern of low grade malignancy, with slow invasion and rare metastasis. To our knowledge, there are no previous reports of vaginal leiomyosarcoma in the cow. Materials and Methods: During rectal examination of a 5-year-old pregnant cow, a single multinodular vaginal mass was encountered and removed surgically after parturition. Tissue samples of the mass were fixed in 10% neutral buffered formalin, paraffin wax-embedded, sectioned (5e6 mm) and stained with haematoxylin and eosin. Results: Grossly, the mass had two convex and flat surfaces. Multiple firm nodular masses and ulcers were observed in the convex and flat surfaces, respectively. On cut section, the tumour was solid, nonencapsulated and grey-white with small yellow foci. Histological examination of the mass revealed round to spindle cells with cellular and nuclear pleomorphism. The tumour cells had indistinguishable cytoplasmic borders and prominent nucleoli. Necrotic debris and infiltration of inflammatory cells around bacterial colonies were present. There was diffuse fibrous connective tissue arranged in interwoven fascicles. Conclusions: The mass was diagnosed as vaginal leiomyosarcoma.
96 VENTRICULAR CANDIDIASIS IN A LOVE BIRD (AGAPORNIS FISCHERI) M. Nouri *, A.R. Movassaghi y and Z. Kamyabi* *University of Tehran, Tehran and yFerdowsi University of Mashhad, Mashhad, Iran Introduction: Candidiasis is caused by a yeast-like fungus, C. albicans. Candidiasis of the avian digestive tract is considered to be rare. Materials and Methods: A young Fisher’s lovebird had clinical signs of asymmetrical nares, weakness and diarrhoea prior to death. Organs were preserved in 7.2% buffered formalin and after processing, sections were prepared and stained with haematoxylin and eosin (HE), periodic acid-Schiff (PAS) and Gram. Results: Gross necropsy examination revealed large haemorrhages in the gizzard and duodenum. Histopathologically, pseudohyphae were detected in the haemorrhagic parts of the gizzard and the surface of the intestine and these extended deep into the submucosa and muscularis. Severe haemorrhages and vasculitis with invasion of fungal organisms into vessel walls were observed. Conclusions: Enlargement of the nares may have predisposed this bird to the disease. On the other hand, candidiasis may have acted as a primary pathogen if the resistance of the bird had been lowered by environmental stress.
ESVP/ECVP Proceedings 2009
301
93
94
GIANT MITOCHONDRIA IN PANCREATIC ACINAR CELLS OF ALLOXAN-INDUCED DIABETIC RATS T. Sano, K. Ozaki, T. Matsuura and I. Narama Department of Pathology, Faculty of Pharmaceutical Sciences, Setsunan University, Nagaotoge-cho, Hirakata, Japan Introduction: The pathomorphological features of eosinophilic granules encountered in pancreatic acinar cells of alloxan-induced diabetic rats were investigated. Materials and Methods: Diabetes was induced in five male F344 rats by single intravenous dosing with 35 mg/kg of alloxan at 6 weeks of age. Rats were killed after 25 weeks. Results: Histologically, pancreatic acini were diffusely atrophic with loss of islets. Eosinophilic granules of varying size were observed in the basal area of acinar cells and did not stain by periodic acid-schiff, Alcian blue, oil red O and Sudan III. Ultrastructurally, giant granules corresponding to eosinophilic granules were surrounded by double membranes with irregular cristae. Small zymogen granules with low electron density accumulated near the lumen, and a large number of small lipid droplets were present at the basal area. Immunohistochemical analysis of prohibitin, a protein located in the mitochondrial inner membrane, was partially positive in the marginal area of some eosinophilic granules, but negative in the central areas. A positive reaction for succinate dehydrogenase, one of the mitochondrial enzymes, showed similar localization to prohibitin by enzyme histochemistry. Conclusions: These findings confirmed that the eosinophilic granules in the exocrine pancreas of alloxan-induced diabetic rats were giant mitochondria.
THE EFFECT OF INFRA-RED LASER IRRADIATION ON WOUND HEALING IN HAMSTERS A. Nasirian *, N. Nasirian y, A. Lazar z and H. Azarabadx *Department of Surgery, Faculty of Specialized Veterinary Science, Science and Research Branch, Islamic Azad University, Tehran, yDepartment of Pathology, Specialized Sina Hospital, Ghazvin University of Medical Science, Ghazvin, z Veterinary LASER Institute, Tehran and xDepartment of Pathology, Faculty of Veterinary Medicine, Tehran University, Tehran, Iran Introduction: Acceleration of the wound healing process after surgical incision is important in cosmetic surgery. In this study, the effect of infra-red (IR) laser therapy on vascular growth and fibroblast proliferation in hamsters was evaluated. Materials and Methods: Thirty male and female adult Syrian hamsters were selected randomly. Under general anaesthesia, a 1 cm incision was made on the back and sutured with a simple interrupted pattern. Animals were divided into two groups (n 5 15; experimental and control). The laser group (experimental) was treated with Mustank IR laser (0.5 J/cm2) for 1 min for 6 days. Biopsies were taken at 48 h and on days 5 and 10. Statistical analysis was undertaken with software version 13.0. The Kolmogrov-Smirnov, Mann Whitney U and T tests were used. Results: The mean number of vessels in the experimental animals was significantly higher than control at 48 h. There was a significant difference between the two groups with regard to vascular growth on day 5. Fibroblast growth was more prominent in the experimental group in comparison with the control group. On day 10, the growth of fibroblasts was higher in the experimental group compared with controls. Conclusions: The rate of wound healing in the control group was slower than in the IR laser irradiation group. Fibroplasia and angiogenesis differed significantly between the groups. The use of IR laser irradiation accelerates wound healing in hamsters.
95 VAGINAL LEIOMYOSARCOMA IN A PREGNANT DAIRY COW N. Hossein, K. Iraj and M. Bonyadian Department of Pathobiology, School of Veterinary Medicine Introduction: Tumours of the ruminant female reproductive tract are rare. An estimated 10 e 50% of such tumours are of smooth muscle origin, of which approximately 10% are considered malignant. Leiomyosarcomas in these species are reported to display a growth pattern of low grade malignancy, with slow invasion and rare metastasis. To our knowledge, there are no previous reports of vaginal leiomyosarcoma in the cow. Materials and Methods: During rectal examination of a 5-year-old pregnant cow, a single multinodular vaginal mass was encountered and removed surgically after parturition. Tissue samples of the mass were fixed in 10% neutral buffered formalin, paraffin wax-embedded, sectioned (5e6 mm) and stained with haematoxylin and eosin. Results: Grossly, the mass had two convex and flat surfaces. Multiple firm nodular masses and ulcers were observed in the convex and flat surfaces, respectively. On cut section, the tumour was solid, nonencapsulated and grey-white with small yellow foci. Histological examination of the mass revealed round to spindle cells with cellular and nuclear pleomorphism. The tumour cells had indistinguishable cytoplasmic borders and prominent nucleoli. Necrotic debris and infiltration of inflammatory cells around bacterial colonies were present. There was diffuse fibrous connective tissue arranged in interwoven fascicles. Conclusions: The mass was diagnosed as vaginal leiomyosarcoma.
96 VENTRICULAR CANDIDIASIS IN A LOVE BIRD (AGAPORNIS FISCHERI) M. Nouri *, A.R. Movassaghi y and Z. Kamyabi* *University of Tehran, Tehran and yFerdowsi University of Mashhad, Mashhad, Iran Introduction: Candidiasis is caused by a yeast-like fungus, C. albicans. Candidiasis of the avian digestive tract is considered to be rare. Materials and Methods: A young Fisher’s lovebird had clinical signs of asymmetrical nares, weakness and diarrhoea prior to death. Organs were preserved in 7.2% buffered formalin and after processing, sections were prepared and stained with haematoxylin and eosin (HE), periodic acid-Schiff (PAS) and Gram. Results: Gross necropsy examination revealed large haemorrhages in the gizzard and duodenum. Histopathologically, pseudohyphae were detected in the haemorrhagic parts of the gizzard and the surface of the intestine and these extended deep into the submucosa and muscularis. Severe haemorrhages and vasculitis with invasion of fungal organisms into vessel walls were observed. Conclusions: Enlargement of the nares may have predisposed this bird to the disease. On the other hand, candidiasis may have acted as a primary pathogen if the resistance of the bird had been lowered by environmental stress.