Analysis of Tumor Suppressor Gene p53 in Chicken Lymphoblastoid Tumor Cell Lines and Field Tumors

Journal of Veterinary Medical Science

Kazuhiko OHASHI¹  Misao ONUMA¹  Toshifumi MORIMURA¹  Michihiro TAKAGI¹  Chihiro SUGIMOTO¹ 

[1] Laboratory of Infectious Diseases, Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University

关键词: Marek's disease;    p53;    RT-PCR;    transformation;   

DOI  :  10.1292/jvms.60.923

学科分类：兽医学

来源: Japanese Society of Veterinary Science

【 摘 要 】

References(34)Cited-By(4)To determine whether there is any abnormalities of the p53 gene in chicken lymphoblastoid tumor cell lines derived from Marek's disease (MD), lymphoid leukosis, reticuloendotheliosis, and field tumors, some portions of p53 cDNA corresponding to core and C-terminal domains (nucleotide positions 277-1104 in the p53 open reading frame (ORF)) were sequenced. Several mutations were identified in both cell lines and field tumors. However, none of these mutations is localized at the "hot spot", which has been reported as the site for transformation-activating mutations. Moreover, partial cDNA clones with a 122-bp deletion in the p53 ORF were identified in two cell lines, MSB1 and MTB1 derived from MD tumors. Southern blot analysis showed that no deletion occurred in the genome of p53 in MSB1, indicating that deletion occurred at the transcriptional level. This deletion could cause a frame shift of the encoding p53 protein, possibly resulting in the generation of a functionally different p53 protein. However, we confirmed that p53 mRNA without deletion is also present in each of these cell lines. These mutations of the p53 gene and deletion in the p53 transcript may be ones of molecular changes specific to the transformation induced by MD virus.

【 授权许可】

Unknown