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Title: Studies on the cross-clade and cross-species conservation of HIV-1 Gag-specific CD8 and CD4 T cell responses elicited by a clade B DNA/MVA vaccine in macaques. Author: Amara RR, Sharma S, Patel M, Smith JM, Chennareddi L, Herndon JG, Robinson HL. Journal: Virology; 2005 Mar 30; 334(1):124-33. PubMed ID: 15749128. Abstract: Here, we evaluate the T cell responses raised by our HIV-1 clade B DNA/MVA vaccine for recognition of a HIV-1 circulating recombinant form (CRF) AG Gag sequence (CRF-02). The cross-clade activity for the AG sequence was better conserved for CD8 than CD4 T cells. CD8 T cells exhibited 75% conservation for height and 83% conservation for breadth, whereas CD4 responses exhibited 45% conservation for height and 50% conservation for breadth. Five CD8 epitopes and 8 CD4 epitopes were mapped. Three of the 5 CD8 epitopes and 2 of the 8 CD4 epitopes were conserved across multiple HIV-1 clades. Impressively, all of the CD8 epitopes and half of the CD4 epitopes have been reported for human infections. Our results demonstrate that the clade B DNA/MVA HIV vaccine elicits T cell responses against epitopes that are conserved in multiple clades and recognized by humans and macaques.[Abstract] [Full Text] [Related] [New Search]