Two antibodies (REGN3051 and REGN3048) targeting RBD
of S protein to prevent its binding to DPP4 were developed and
found to be the potential inhibitors of MERS-CoV.44 These two
antibodies were tested on a mouse model that was developed
by substituting mouse DPP4 ORF with human DPP4 (hDPP4)
ORF, assuring normal physiological expression of hDPP4. A
previously developed animal model was effective but expressed
hDPP4 in all types of cells, resulting in non-physiological
expression.45 In a recent in vivo study, modified vaccinia virus
Ankara, which stably expresses the MERS-CoV S protein,
exhibited less or no MERS-CoV replication.46 Moreover, the
vaccinated mouse was further infected with MERS-CoV and
transduced with hDPP4 to prove its efficacy.46
Two antibodies (REGN3051 and REGN3048) targeting RBDof S protein to prevent its binding to DPP4 were developed andfound to be the potential inhibitors of MERS-CoV.44 These twoantibodies were tested on a mouse model that was developedby substituting mouse DPP4 ORF with human DPP4 (hDPP4)ORF, assuring normal physiological expression of hDPP4. Apreviously developed animal model was effective but expressedhDPP4 in all types of cells, resulting in non-physiologicalexpression.45 In a recent in vivo study, modified vaccinia virusAnkara, which stably expresses the MERS-CoV S protein,exhibited less or no MERS-CoV replication.46 Moreover, thevaccinated mouse was further infected with MERS-CoV andtransduced with hDPP4 to prove its efficacy.46
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