Methods for the in vitro production of enucleated red blood cells and the enucleated red blood cells thus prepared are provided. Such enucleated red blood cells may express a sortaggable surface protein, which allows for surface modification in the presence of a sortase. Also described herein are surface modified enucleated red blood cells, e.g., conjugated with an agent of interest such as a peptide, a detectable label, or a chemotherapeutic agent, and uses thereof in delivering the agent to a subject.

Disclosed herein are compositions, reagents, and methods that can be used to observe multiple targets. The targets can be observed using a variety of methods, for example, by fluorescence, EM, and CLEM. The systems and methods involve the use of self-sorting coiled-coil heterodimers that label multiple proteins in a sample. These compositions, interchangeably termed VIP tags herein can be used to efficiently label cellular proteins with high specificity.

Provided herein are polypeptides that bind to a transferrin receptor, methods of generating such polypeptides, and methods of using the polypeptides to target a composition to a transferrin receptor-expressing cell.

This invention relates to compositions and methods for treating or diagnosing cancer.

The CD71 receptor is used as a target in the prognosis and/or treatment of endometriosis, and to a test for the prognosis or therapeutic monitoring of endometriosis, targeting this receptor.

Provided herein are polypeptides that bind to a blood-brain barrier (BBB) receptor, methods of generating such polypeptides, and methods of using the polypeptides to target a composition to a BBB receptor-expressing cell, e.g., for transport across the BBB. Also provided herein are transferrin receptor (TfR) constructs that comprise a monomeric TfR apical domain or one or more portions of the TfR apical domain which have been circularly permuted relative to the full-length TfR sequence.

In some aspects, the present invention provides chimeric transferrin receptor (TfR) polynucleotides and polypeptides. In other aspects, this invention provides chimeric TfR transgenic animal models and methods of using the animal models to identify therapeutics that can cross the blood-brain barrier.

Methods for the in vitro production of enucleated red blood cells and the enucleated red blood cells thus prepared are provided. Such enucleated red blood cells may express a sortaggable surface protein, which allows for surface modification in the presence of a sortase. Also described herein are surface modified enucleated red blood cells, e.g., conjugated with an agent of interest such as a peptide, a detectable label, or a chemotherapeutic agent, and uses thereof in delivering the agent to a subject.

Provided are oligomeric agents, oligomeric compounds, methods, and pharmaceutical compositions for reducing the amount or activity of PLN RNA in a cell or animal, and in certain instances reducing the amount of PLN protein in a cell or animal. Such oligomeric agents, oligomeric compounds, methods, and pharmaceutical compositions are useful to treat cardiomyopathy, heart failure, or arrhythmia.

The invention relates to constructs, cells and methods for modulating the immune system that optimize presentation of CD4 and CD8 epitopes to antigen-presenting cells and transfection into cells. Epitopes to either self antigens or non-self antigens can be used to optimize either a tolerance or immunogenicity to those epitopes, respectively. Certain new constructs encode one or more dominant, disease-driving epitopes (CD4) targeted for MHCII processing within the endosomes of a cell and one or more epitopes (CD8) targeted for MHCI processing within the cytosol of the cell, to produce the maximum antigen/epitope presentation in the immune system, and further include an MHCII activator sequence. Alternatively, the new constructs encode CD4 and CD8 epitopes operably linked to a secretion signal.