Expression of p53 protein, Jaagsiekte sheep retrovirus matrix protein, and surfactant protein in the lungs of sheep with pulmonary adenomatosis.

Abstract

Ovine pulmonary adenocarcinoma (OPA) is a naturally occurring cancer in sheep that is caused by the Jaagsiekte sheep retrovirus (JSRV). Because the pathologic and epidemiologic features of OPA are similar to those of bronchoalveolar carcinoma in humans, OPA is considered a useful animal model for pulmonary carcinogenesis. In this study, 3,512 lungs from various breeds of sheep were collected and macroscopically examined. OPA was identified in 30 sheep, and samples of these animals were further examined by histologic, immunohistochemical (p53 protein, surfactant protein A [SP-A], proliferating cell nuclear antigen [PCNA], JSRV matrix protein [MA]), and PCR methods. Papillary or acinar adenocarcinomas were detected microscopically in the affected areas. Immunoreactivity for p53 PAb240 was detected in 13 sheep, whereas p53 DO-1 was not detected in any of the OPA animals. PCNA immunoreactivity was recorded in 27 animals. SP-A and JSRV MA protein was immunopositive in all 30. JSRV proviral DNA was detected by PCR analysis in all of the lung samples collected from OPA animals. In addition, the pulmonary SP-A levels were increased in tumor cells. The results of this study suggest that PCNA and p53 protein expression may be useful indicators in monitoring malignancy of pulmonary tumors.

• Authors: Fatma İlhan, Sevil A Vural, Serkan Yıldırım, İbrahim Sözdutmaz, Mehmet E Alcigir
• Journal: Journal of veterinary diagnostic investigation : official publication of the American Association of Veterinary Laboratory Diagnosticians, Inc (J Vet Diagn Invest) Vol. 28 Issue 3 Pg. 249-56 (May 2016) ISSN: 1943-4936 [Electronic] United States
• PMID: 27016721 (Publication Type: Journal Article)
• Copyright: © 2016 The Author(s).

Chemical References

• Pulmonary Surfactant-Associated Protein A
• Tumor Suppressor Protein p53

Topics

• Animals
• Immunohistochemistry (veterinary)
• Jaagsiekte sheep retrovirus (pathogenicity)
• Lung (pathology)
• Polymerase Chain Reaction (veterinary)
• Pulmonary Adenomatosis, Ovine (metabolism, pathology, virology)
• Pulmonary Surfactant-Associated Protein A (metabolism)
• Sheep
• Tumor Suppressor Protein p53 (metabolism)