KSHV Latency Locus Cooperates with Myc to Drive Lymphoma in Mice

PLoS Pathogens

Dirk P. Dittmer¹  Sang-Hoon Sin¹  Anthony Eason¹  Yongbaek Kim² 

[1] Department of Microbiology and Immunology, Program in Global Oncology, Lineberger Comprehensive Cancer Center, and Center for AIDS Research, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America;Department of Veterinary Medicine, College of Veterinary Medicine, Seoul National University, Seoul, South Korea

关键词: Lymphomas;    B cells;    Spleen;    Mouse models;    Kaposi's sarcoma-associated herpesvirus;    Genetic loci;    Viral persistence;    latency;    Genetically modified animals;   

DOI  :  10.1371/journal.ppat.1005135

学科分类：生物科学（综合）

来源: Public Library of Science

【 摘 要 】

Kaposi sarcoma-associated herpesvirus (KSHV) has been linked to Kaposi sarcoma and B-cell malignancies. Mechanisms of KSHV-induced oncogenesis remain elusive, however, in part due to lack of reliable in vivo models. Recently, we showed that transgenic mice expressing the KSHV latent genes, including all viral microRNAs, developed splenic B cell hyperplasia with 100% penetrance, but only a fraction converted to B cell lymphomas, suggesting that cooperative oncogenic events were missing. Myc was chosen as a possible candidate, because Myc is deregulated in many B cell lymphomas. We crossed KSHV latency locus transgenic (latency) mice to Cα Myc transgenic (Myc) mice. By itself these Myc transgenic mice develop lymphomas only rarely. In the double transgenic mice (Myc/latency) we observed plasmacytosis, severe extramedullary hematopoiesis in spleen and liver, and increased proliferation of splenocytes. Myc/latency mice developed frank lymphoma at a higher rate than single transgenic latency or Myc mice. These data indicate that the KSHV latency locus cooperates with the deregulated Myc pathways to further lymphoma progression.

【 授权许可】

CC BY