The present invention relates to a method of generating a transgenic mesenchymal stem cell population carrying a transgene, a transgenic mesenchymal stem cell population obtained by or obtainable by the method and a pharmaceutical composition and uses of the transgenic mesenchymal stem cell population in particular for gene therapy. The invention is also directed to methods of treating a disease or disorder comprising administering the transgenic mesenchymal stem cell population or a pharmaceutical composition containing a transgenic mesenchymal stem cell population of the invention to a subject in need thereof.本發明涉及一種產生攜帶轉殖基因的轉殖基因間質幹細胞群之方法,透過該方法獲得或可獲得的轉殖基因間質幹細胞群,以及醫藥組合物以及該轉殖基因間質幹細胞群之用途,特別是用於基因治療。本發明還涉及治療疾病或病症之方法,包括將該轉殖基因間質幹細胞群或含有本發明之轉殖基因間質幹細胞群的醫藥組合物給予有需要之個體。