The invention relates a method for producing a stable recombinant protein, comprising growing a non-naturally occurring host cell in a culture medium to produce a recombinant protein, and making a composition comprising the recombinant protein and a polysorbate. The production of endogenous lipoprotein lipase by the host cell is reduced. The endogenous lipoprotein lipase is present in the composition in a small amount, and is capable of degrading the polysorbate. The invention also relates to the relevant host cells and compositions, and preparation thereof.

The invention relates to mRNA therapy for the treatment of hyperlipidemia. mRNAs for use in the invention, when administered in vivo, encode human lipoprotein lipase (LPL), isoforms thereof, functional fragments thereof, and fusion proteins comprising LPL. mRNAs of the invention are preferably encapsulated in lipid nanoparticles (LNPs) to effect efficient delivery to cells and/or tissues in subjects, when administered thereto, mRNA therapies of the invention increase and/or restore deficient levels of LPL expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of triglycerides associated with deficient LPL activity in subjects.

The present disclosure relates to methods, cells, and compositions for producing a product of interest, e.g., a recombinant protein. In particular, the present disclosure provides improved mammalian cells expressing the product of interest, where the cells (e.g., Chinese Hamster Ovary (CHO) cells) have reduced or eliminated activity, e.g., expression, of certain host cell proteins, e.g., enzymes including, but not limited to, certain lipases, esterases, and/or hydrolases.

The invention relates to mRNA therapy for the treatment of hyperlipidemia. mRNAs for use in the invention, when administered in vivo, encode human lipoprotein lipase (LPL), isoforms thereof, functional fragments thereof, and fusion proteins comprising LPL. mRNAs of the invention are preferably encapsulated in lipid nanoparticles (LNPs) to effect efficient delivery to cells and/or tissues in subjects, when administered thereto, mRNA therapies of the invention increase and/or restore deficient levels of LPL expression and/or activity in subjects. mRNA therapies of the invention further decrease levels of triglycerides associated with deficient LPL activity in subjects.

The invention relates a method for producing a stable recombinant protein, comprising growing a non-naturally occurring host cell in a culture medium to produce a recombinant protein, and making a composition comprising the recombinant protein and a polysorbate. The production of endogenous lipoprotein lipase by the host cell is reduced. The endogenous lipoprotein lipase is present in the composition in a small amount, and is capable of degrading the polysorbate. The invention also relates to the relevant host cells and compositions, and preparation thereof.

Provided herein are systems (e.g., reagents, devices, etc.) and methods for characterization of hypertriglyceridemia (HTG) in a subject. In particular, systems and methods, are provided for identifying the specific deficiency(ies) leading to HTG, and selecting an appropriate strategy for the treatment of HTG based thereof.

The invention relates a method for producing a stable recombinant protein, comprising growing a non-naturally occurring host cell in a culture medium to produce a recombinant protein, and making a composition comprising the recombinant protein and a polysorbate. The production of endogenous lipoprotein lipase by the host cell is reduced. The endogenous lipoprotein lipase is present in the composition in a small amount, and is capable of degrading the polysorbate. The invention also relates to the relevant host cells and compositions, and preparation thereof.

A lipoprotein lipase (LPL) protein for treating and/or preventing HTG and its associated diseases, including but not limited to acute pancreatitis (AP), and in particular, acute pancreatitis secondary to or exacerbated by hypertriglyceridemia, and hypertriglyceridemia and its associated diseases in general, including cardiovascular and metabolic diseases, endocrine disorders, and fat embolism syndrome.

A lipoprotein lipase (LPL) protein for treating and/or preventing HTG and its associated diseases, including but not limited to acute pancreatitis (AP), and in particular, acute pancreatitis secondary to or exacerbated by hypertriglyceridemia, and hypertriglyceridemia and its associated diseases in general, including cardiovascular and metabolic diseases, endocrine disorders, and fat embolism syndrome.

The present disclosure relates to methods, cells, and compositions for producing a product of interest, e.g., a recombinant protein. In particular, the present disclosure provides improved mammalian cells expressing the product of interest, where the cells (e.g., Chinese Hamster Ovary (CHO) cells) have reduced or eliminated activity, e.g., expression, of certain host cell proteins, e.g., enzymes including, but not limited to, certain lipases, esterases, and/or hydrolases.