The present disclosure provides a genetically modified mouse comprising a genomic nucleic acid encoding human APOE4, a genomic nucleic acid encoding mouse TREM2 modified to include a R47H substitution, and at least one genomic modification selected from the group consisting of: (a) a genomic nucleic acid encoding mouse ABCA7 modified to include an A 1541 G substitution; (b) a genomic nucleic acid encoding mouse APP modified to include G60IR, F606Y, and R609H substitutions; (c) a genomic nucleic acid encoding mouse PLCG2 modified to include a M28L substitution; (d) a genomic nucleic acid encoding mouse MTHFR modified to include a A262V substitution; (e) an inactivated Ceacaml allele; and (f) an inactivated II1rap allele. Methods of producing the genetically modified mouse and methods of using the genetically modified mouse are also provided.

The present disclosure provides a genetically modified mouse comprising a genomic nucleic acid encoding human APOE4, a genomic nucleic acid encoding mouse TREM2 modified to include a R47H substitution, and at least one genomic modification selected from the group consisting of: (a) a genomic nucleic acid encoding mouse ABCA7 modified to include an A 1541 G substitution; (b) a genomic nucleic acid encoding mouse APP modified to include G60IR, F606Y, and R609H substitutions; (c) a genomic nucleic acid encoding mouse PLCG2 modified to include a M28L substitution; (d) a genomic nucleic acid encoding mouse MTHFR modified to include a A262V substitution; (e) an inactivated Ceacaml allele; and (f) an inactivated II1rap allele. Methods of producing the genetically modified mouse and methods of using the genetically modified mouse are also provided.

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

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

Disclosed is an auto-induction regulatory system based on quorum sensing, comprising luxI, luxR and egfp, wherein, the promoter for controlling the expression of luxI and luxR is selected from P.sub.luxI, P.sub.BB or P.sub.J23100; the promoter for controlling the expression of egfp is selected from P.sub.luxI, P.sub.luxI(T-38C) or P.sub.luxI(C-77T). Also disclosed are an application of the auto-induction regulatory system based on quorum sensing in the automatic regulation of expression of a target gene of engineered Escherichia coli, as well as an application thereof in the preparation of alginate lyase and esterase. Further disclosed are a recombinant expression vector and a recombinant engineered bacterium comprising the auto-induction regulatory system based on quorum sensing.

Disclosed is an auto-induction regulatory system based on quorum sensing, comprising luxI, luxR and egfp, wherein, the promoter for controlling the expression of luxI and luxR is selected from P.sub.luxI, P.sub.BB or P.sub.J23100; the promoter for controlling the expression of egfp is selected from P.sub.luxI, P.sub.luxI(T-38C) or P.sub.luxI(C-77T). Also disclosed are an application of the auto-induction regulatory system based on quorum sensing in the automatic regulation of expression of a target gene of engineered Escherichia coli, as well as an application thereof in the preparation of alginate lyase and esterase. Further disclosed are a recombinant expression vector and a recombinant engineered bacterium comprising the auto-induction regulatory system based on quorum sensing.

Modified G6PC (glucose-6-phosphatase, catalytic subunit) nucleic acids and glucose-6-phosphatase-α (G6Pase-α) enzymes with increased phosphohydrolase activity are described. Also described are vectors, such as adeno-associated virus (AAV) vectors, and recombinant AAV expressing modified G6Pase-α. The disclosed AAV vectors and rAAV can be used for gene therapy applications in the treatment of glycogen storage disease, particularly glycogen storage disease type Ia (GSD-Ia), and complications thereof.

Modified G6PC (glucose-6-phosphatase, catalytic subunit) nucleic acids and glucose-6-phosphatase-α (G6Pase-α) enzymes with increased phosphohydrolase activity are described. Also described are vectors, such as adeno-associated virus (AAV) vectors, and recombinant AAV expressing modified G6Pase-α. The disclosed AAV vectors and rAAV can be used for gene therapy applications in the treatment of glycogen storage disease, particularly glycogen storage disease type Ia (GSD-Ia), and complications thereof.

The present invention is in the technical field of synthetic biology and metabolic engineering. More particularly, the present invention is in the technical field of fermentation of metabolically engineered microorganisms. The present invention describes engineered microorganisms able to synthesize sialylated compounds via an intracellular biosynthesis route. These microorganisms can dephosphorylate N-acetylglucosamine-6-phosphate to N-acetylglucosamine and convert the N-acetylglucosamine to N-acetylmannosamine. These microorganisms also have the ability to convert N-acetylmannosamine to N-acetyl-neuraminate. Furthermore, the present invention provides a method for the large scale in vivo synthesis of sialylated compounds, by culturing a microorganism in a culture medium, optionally comprising an exogenous precursor such as, but not limited to lactose, lactoNbiose, N-acetyllactosamine and/or an aglycon, wherein said microorganism intracellularly dephosphorylates N-acetylglucosamine-6-phosphate to N-acetylglucosamine, converts N-acetylglucosamine to N-acetylmannosamine and convert the latter further to N-acetyl-neuraminate.

The present invention is in the technical field of synthetic biology and metabolic engineering. More particularly, the present invention is in the technical field of fermentation of metabolically engineered microorganisms. The present invention describes engineered microorganisms able to synthesize sialylated compounds via an intracellular biosynthesis route. These microorganisms can dephosphorylate N-acetylglucosamine-6-phosphate to N-acetylglucosamine and convert the N-acetylglucosamine to N-acetylmannosamine. These microorganisms also have the ability to convert N-acetylmannosamine to N-acetyl-neuraminate. Furthermore, the present invention provides a method for the large scale in vivo synthesis of sialylated compounds, by culturing a microorganism in a culture medium, optionally comprising an exogenous precursor such as, but not limited to lactose, lactoNbiose, N-acetyllactosamine and/or an aglycon, wherein said microorganism intracellularly dephosphorylates N-acetylglucosamine-6-phosphate to N-acetylglucosamine, converts N-acetylglucosamine to N-acetylmannosamine and convert the latter further to N-acetyl-neuraminate.