POSITIONAL CANDIDATE GENES FOR RESISTANCE TO MAREK’S DISEASE BY SCREENING FOR MAREK’S DISEASE VIRUS MEQ-REGULATED GENES
Avian Disease and Oncology Laboratory
2009 Annual Report
1a.Objectives (from AD-416)
As described in USDA NRI-funded grant, we will:
1. Identify MDV Meq and c-Jun binding sites in the chicken genome.
2. Identify differentially expressed genes following MDV-reactivation in MSB-1 cells.
3. Determine if differentially expressed genes identified in objective 2 also show differentially expression between MD tumors and CD4+ T cells.
4. Identify differentially expressed genes as a function of genetic resistance status or the presence of Meq.
1b.Approach (from AD-416)
1. Utilize chromatin immunoprecipitation (ChIP) using Meq or c-Jun antibodies and determine the DNA sequences via Solexa paired-end reads.
2. Isolate RNA from MSB-1 cells at time 0 and following MDV reactivation, and run on Affymetrix Chicken microarrays.
This project is directly linked to project 3635-31320-008-24R with the same project title “Positional Candidate Genes for Resistance to Marek’s Disease by Screening for Marek’s Disease Meq-Regulated Genes.”
Within the short period of time since initiation of the project, significant progress has been made. The goal of this project is to identify chicken genes that confer resistance to Marek’s disease (MD), a significant issue to the poultry industry caused by the pathogenic Marek’s disease virus (MDV). MDV Meq is the likely oncogene and encodes a protein that controls expression of both viral and chicken genes. Using biotechnology, we are in the process of identifying regions in the chicken genome that Meq directly binds to and genes that are regulated by the presence of Meq. It is our hope that by combining these two sets of information we will be able to identify the genes controlled by Meq and the associated biological pathways. Thus far, we have DNA sequences for Meq-binding regions and are in the process of finding Meq-regulated genes. This project is monitored by e-mail, telephone calls, and almost weekly face-to-face meeting between the two parties.