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We recently identified human P-selectin glycoprotein ligand-1 (PSGL-1) as a functional enterovirus 71 (EV71) receptor and demonstrated PSGL-1-dependent replication for some EV71 strains in human leukocytes. Here, we report that four out of five PSGL-1-binding strains of EV71 replicated poorly in mouse L929 cells stably expressing human PSGL-1 (L-PSGL-1 cells). Therefore, we compared the replication kinetics and entire genomic sequence of five original EV71 strains and the corresponding EV71 variants (EV71-LPS), which were propagated once in L-PSGL-1 cells. Direct sequence comparison of the entire genome of the original EV71 strains and EV71-LPS variants identified several possible adaptive mutations during the course of replication in L-PSGL-1 cells, including a putative determinant of the adaptive phenotype in L-PSGL-1 cells at VP2-149. The results suggest that an adaptive mutation, along with a PSGL-1-binding phenotype, may facilitate efficient PSGL-1-dependent replication of the EV71 strains in L-PSGL-1 cells.
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Journal of General Virology vol. 92 , part 2, pp. 287 - 291
Supplementary Fig. S1. Preparation of original EV71 and EV71-LPS
Supplementary Fig. S2. EV71-1095 replication kinetics in RD, Jurkat and human peripheral blood mononuclear cells (PBMC)
Supplementary Fig. S3. Replication of L-PSGL-1-adapted variants in Jurkat cells incubated with the anti-PSGL-1 mAb [Single PDF file](310 KB)