The present invention provides fusion proteins comprising leptin and a second protein. The presence of the second protein provides increased biological activity and/or increased half-life in vivo. The present invention also provides human, canine and feline leptin molecules fused to peptides, antibodies or antibody fragments which enhances the abilities of the leptin molecules to transport through the blood-brain-barrier (BBB). The present invention also provides fusion proteins further comprising a peptide agonist that is capable of binding to and stimulate one, two or all three of the following receptors: GLP-1 receptor, Glucagon receptor, and GIP receptor. Also disclosed is a method of production such fusion proteins through recombinant technologies. The invention further discloses a pharmaceutical composition comprising one of the fusion proteins as an active intergradient as well as a method for using such a pharmaceutical composition to treat diseases in dogs, cats and humans.

The present disclosure provides recombinantly manufactured fusion proteins comprising a SARS-CoV-2 Receptor Binding Domain (SARS-CoV-2-RBD) fragment or an analog thereof linked to a human Fc fragment for use in relation to the 2019 Novel Coronavirus (COVID-19). Embodiments include the administration of the fusion proteins to patients that have recovered from COVID-19 as a booster vaccination, to antibody naïve patients to produce antibodies to the SARS-CoV-2 virus to enable the patients to become convalescent plasma donors, to patients who have been infected by the SARS-CoV-2 virus and have contracted COVID-19 in order to limit the scope of the infection and ameliorate the disease, and as a prophylactic COVID-19 vaccine. Exemplary Fc fusion proteins and pharmaceutical formulations of exemplary Fc fusion proteins are provided, in addition to methods of use and preparation.

The present invention relates to variant Fc-containing molecules, such as antibodies and Fc-fusion molecules, having glycosylation characteristics favorable to large-scale production of therapeutic molecules containing such variant Fc.

The invention features combination therapies using an IL-15-based superagonist complex and an antibody to effectively treat subjects with cancer and infectious diseases.

In some aspects, the disclosure relates to GDF/BMP antagonists and methods of using GDF/BMP antagonists to treat, prevent, or reduce the progression rate and/or severity of pulmonary hypertension (PH), particularly treating, preventing or reducing the progression rate and/or severity of one or more PH-associated complications. The disclosure also provides methods of using a GDF/BMP antagonist to treat, prevent, or reduce the progression rate and/or severity of a variety of conditions including, but not limited to, pulmonary vascular remodeling, pulmonary fibrosis, and right ventricular hypertrophy. The disclosure further provides methods of using a GDF/BMP antagonist to reduce right ventricular systolic pressure in a subject in need thereof.

In certain aspects, the present invention provides compositions and methods for altering iron metabolism to increase red blood cell and/or hemoglobin levels in vertebrates, including rodents and primates, and particularly in humans.

Provided herein are immunomodulatory proteins comprising ICOSL variants and nucleic acids encoding such proteins. The immunomodulatory proteins provide therapeutic utility for a variety of immunological and oncological conditions. Compositions and methods for making and using such proteins are provided.

Disclosed herein are compositions and methods for preparation and use of protein therapeutics, and more particularly protein clusters or backpacks having a plurality of therapeutic protein monomers reversibly crossed-linked by biodegradable linkers.

The present invention provides novel antibodies and antigen binding fragments thereof that bind to human CD30. Also presented are single chain variable antibodies, chimeric antigen receptors and uses thereof. Methods of treating cancer are also disclosed.

Provided herein are cytokines or functional fragments thereof that, in some embodiments, are engineered to be masked by a masking moiety at one or more receptor binding site(s) of the cytokine or functional fragment thereof. In some embodiments, the cytokines are engineered to be activatable by a protease at a target site, such as in a tumor microenvironment, by including a proteolytically cleavable linker. In some embodiments, the proteolytically cleavable linker links the cytokine to the masking moiety, links the cytokine to a half-life extension domain, and/or links the masking moiety to a half-life extension domain. The masking moiety blocks, occludes, inhibits (e.g., decreases) or otherwise prevents (e.g., masks) the activity or binding of the cytokine to its cognate receptor or protein. Upon proteolytic cleavage of the cleavable linker at the target site, the cytokine becomes activated, which renders it capable of binding to its cognate receptor or protein with increased affinity.