GENETHON

The invention relates to a method of preparation of a recombinant hybrid adeno-associated virus (AAV) capsid protein with improved tropism and to the recombinant hybrid AAV capsid protein obtainable by the method. The invention relates also to the derived expression vector, modified cell, and hybrid capsid AAV vector particle packaging a gene of interest, and its use in tissue-targeted gene therapy for treating various diseases.

The present disclosure relates to the treatment of dilated cardiomyopathies, in particular to 5 the use of an inhibitor of CILP-1.

The present invention relates to a method for obtaining stable pseudotyped lentiviral particles including a heterologous gene of interest, comprising the following steps: a) transfecting at least one plasmid in appropriate cell lines, wherein said at least one plasmid comprises the gene of interest, the rev, gag and pol genes, and a sequence coding for an ERV syncytin, wherein the rev, gag and pol genes are retroviral genes; b) incubating the transfected cells obtained in a), so that they produce the stable pseudotyped lentiviral particles in the supernatant; and c) harvesting and concentrating the stable lentiviral particles obtained in b). The present invention also relates to a method to transduce immune cells using lentiviral vectors pseudotyped with an ERV syncytin glycoprotein. The method can be performed on non-stimulated blood cells or on cells stimulated briefly with IL7, and the cells can be expanded. The stable pseudotyped lentiviral particles obtained are particularly useful in gene therapy.

The invention relates to an adeno-associated virus (AAV) vector comprising a nucleic acid construct for the expression of a glucose-6-phosphatase-a (G6Pase-a) in a cell, the construct comprising a nucleic acid sequence encoding the G6Pase-a, wherein the nucleic acid sequence encoding the G6Pase-a is operably linked to a human alpha-1 antitrypsin (hAAT) promoter, a cell transformed with the vector of the invention, a composition comprising the vector or the cell of the invention, and the use thereof.

The present invention relates to vectors and compositions for the treatment of glycogen storage disease III.

Despite the eye's immune-privileged status, a secondary loss of vision in some patients treated with AAV led the inventors to question the immunogenicity of AAV vectors after a subretinal injection. The inventors thus characterized anti-transgene and anti-capsid immune responses induced in the periphery after the subretinal AAV injection. Different doses of AAV8 encoding reporter proteins fused with the HY male antigen were injected at day 0 into the subretinal space of adult immunocompetent C57BL/6 female mice. Subretinal AAV injection induced a dose-dependent proinflammatory immune response to the transgene product, correlated with local transgene expression. In order to trigger a subretinal-associated immune inhibition (SRAII) mechanism, some mice were co-injected subretinally at day 0 with AAV and HY peptides. Interestingly, this subretinal co-injection of AAV8 with peptides of the transgene product modulated the anti-transgene T-cell immune response, even at high dose of vector (5.10 10 vg). This immunodulation was also confirmed in a pathophysiological murine model of retinal degeneration. The inventors also demonstrated that injection of AAV8 in the subretinal space induces proinflammatory peripheral immune responses to the transgene and the capsid that could be counteracted y co-injection with transgene peptides. Accordingly, the object of the present invention is to provide methods for preventing induction of immune responses to the transgene product and the AAV capsid after ocular gene therapy.

The invention relates to the use of a recombinant porcine adeno-associated virus (AAV) vector comprising a peptide-modified porcine AAV serotype 1 (AAVpol) capsid in gene therapy of muscle and/or central nervous system (CNS) disorders, in particular neuromuscular diseases such as genetic neuromuscular diseases.

The present invention relates to a vector comprising an ASAH1 open reading frame, for use in the treatment of acid ceramidase deficiency.

Disclosed herein are methods for treating patients that may develop or already have pre-existing gene therapy neutralizing antibodies by administering a protease that cleaves peptide bonds present in immunoglobulins or by administering a glycosidase that cleaves carbohydrate residues present on immunoglobulins, or other similar enzymatic cleavage of immunoglobulins in vivo. Also disclosed are methods for utilizing IdeS and other immunoglobulin G-degrading enzyme polypeptides for gene therapy treatment of a disease in a patient in need thereof.

The present invention relates to peptides and compositions for use in improving transduction efficiency of viruses into target cells.