Abstract: An optimized coding sequence of human blood clotting factor eight (VIII) and a promoter may be used in vectors, such as rAAV, for introduction of factor VIII, and/or other blood clotting factors and transgenes. Exemplary of these factors and transgenes are alpha-1-antitrypsin, as well as those involved in the coagulation cascade, hepatocyte biology, lysosomal storage, urea cycle disorders, and lipid storage diseases. Cells, vectors, proteins, and glycoproteins produced by cells transformed by the vectors and sequence, may be used in treatment.

Abstract: There is provided a nucleic acid molecule comprising a nucleotide sequence encoding for a functional factor VIII protein, wherein the portion of the nucleotide sequence encoding for the B domain of the factor VIII protein is between 90 and 111 nucleotides in length and encodes for an amino acid sequence comprising a sequence having at least 85% identity to SEQ ID NO: 4 and which comprises six asparagine residues. Also provided is a functional factor VIII protein, a vector comprising the above nucleic acid molecule, a host cell, a transgenic animal, a method of treating haemophilia, e.g. haemophilia A, and a method for the preparation of a parvoviral gene delivery vector.

Abstract: An optimized coding sequence of human blood clotting factor eight (VIII) and a promoter may be used in vectors, such as rAAV, for introduction of factor VIII, and/or other blood clotting factors and transgenes. Exemplary of these factors and transgenes are alpha-1-antitrypsin, as well as those involved in the coagulation cascade, hepatocye biology, lysosomal storage, urea cycle disorders, and lipid storage diseases. Cells, vectors, proteins, and glycoproteins produced by cells transformed by the vectors and sequence, may be used in treatment.