In these experiments we transduced pLEC with increasing doses of CXCR7 adenovirus, harvested cells at 20 hours post-infection and performed quantitative RT-PCR analysis for mRNA expression of CXCR7, SDF-1/CXCL12 and ITAC/CXCL11 (Table 2). Here, CXCL11 is linked to infection.