Pointwise changes have been identified in the 3'UTR nucleotide sequence of the VEGF gene, which substantially increase the lifetime of its transcription product, i.e. mRNA in the cells of mammals. By experimentation, a gene construct has been selected with an optimal list of identified mutations, characterized by the longest lifetime of mRNA. The biological effect of the developed gene construct and the pharmaceutical composition based thereon has been confirmed in vitro and in vivo.