This invention provides compositions and methods to prevent aberrant cell proliferation in a subject using a single-domain antibody (sdAb) directed against an intracellular component, wherein the aberrant cell proliferation can be cancer. The sdAb is synergistic with one or more chemotherapeutic drugs and improves therapeutic efficacy of the one or more chemotherapeutic drug against cancer. The invention also includes a method of treating viral infections using a sdAb, wherein the sbAb inhibits the replication of viruses such as Ebola virus and Zika virus in infected cells.

The present disclosure provides intrabody compositions comprising i) an intrabody and ii) one or more inserts. The disclosure also provides methods for activating and deactivating intracellular and extracellular interactions utilizing the compositions, for instance via chemical and/or light.

The present invention relates to active form specific anti-Rho GTPase conformational single domain antibodies and their uses in particular in the therapeutic and diagnostic fields. In particular, the present invention relates to a single domain antibody wherein the amino acid sequences of CDR1-IMGT, CDR2-IMGT and CDR3-IMGT have at least 90% of identity with the amino acid sequences of the CDR1-IMGT, CDR2-IMGT and CDR3-IMGT of the H12, B6, 4P75, 4SP1, 4SNP36, 4SNP61, 5SP10, 5SP11, 5SP58, 5SNP47, 5SNP48, 5SNP65, B20, B15, B5, B71, E3, A6, G12, NB61, 212B, 111B or 404F (hs2dAb) single domain antibody which are defined in Table B.

The disclosure teaches antibodies that are useful, inter alia, in methods for detecting and treating human cancer. In a particular aspect, the disclosure teaches novel antibodies that are useful for detecting and treating human breast cancer. In some embodiments, the disclosure teaches novel antibodies that bind to filamin A. In some embodiments, the antibodies are intrabodies.

The invention relates to the identification of a highly stable single domain antibody scaffold (hs2dAb) and its use in generating synthetic single domain antibody library (hs2dAb-L1). The invention also relates to antigen-binding proteins comprising said stable single domain antibody scaffold and their uses, in particular as therapeutics.

The present invention includes compositions and methods for the expression, secretion and use of novel compositions for use as, e.g., vaccines and antigen delivery vectors, to delivery antigens to antigen presenting cells. In one embodiment, the vector is an anti-CD40 antibody, or fragments thereof, and one or more antigenic peptides linked to the anti-CD40 antibody or fragments thereof, including humanized antibodies.

The present invention includes compositions and methods for the expression, secretion and use of novel compositions for use as, e.g., vaccine and antigen delivery vectors, to delivery antigens to antigen presenting cells. In one embodiment, the vector is an anti-CD40 antibody, or fragments thereof, and one or more antigenic peptides linked to the anti-CD40 antibody or fragments thereof, including humanized antibodies.

The present invention provides new anti-SIRPa antibodies able to specifically antagonize the interaction between SIRPa and CD47, without affecting the interaction between SIRPg and CD47, and their uses.

Active forms of specific anti Rho GTPase conformational single domain antibodies are useful in the therapeutic and diagnostic fields. In particular, single domain antibodies wherein the amino acid sequences of CDR1-IMGT, CDR2-IMGT and CDR3-IMGT have at least 90% of identity with the amino acid sequences of the CDR1-IMGT, CDR2-IMGT and CDR3-IMGT of the H12, B6, 4P75, 4SP1, 4SNP36, 4SNP61, 5SP10, 5SP11, 5SP58, 5SNP47, 5SNP48, 5SNP65, B20, B15, B5, B71, E3, A6, G12, NB61, 212B, 111B or 404F (hs2dAb) are defined in Table B.

The present invention provides new anti-SIRPa antibodies able to specifically antagonize the interaction between SIRPa and CD47, without affecting the interaction between SIRPg and CD47, and their uses.