Disclosed herein are compositions and methods for increasing the stability of recombinant nanobodies. Also disclosed herein are recombinant nanobodies comprising an IL-2 polypeptide that bind serum albumin and uses thereof for treating cancers.

Provided herein are methods and compositions relating to libraries of optimized antibodies having nucleic acids encoding for an antibody comprising modified sequences. Libraries described herein comprise nucleic acids encoding SARS-CoV-2 or ACE2 antibodies. Further described herein are protein libraries generated when the nucleic acid libraries are translated. Further described herein are cell libraries expressing variegated nucleic acid libraries described herein.

Described herein are nucleic acids encoding single-domain antibodies that might serve as alternatives to conventional monoclonal antibodies for either the detection or treatment of Chikungunya Virus (CHIKV).

The present invention relates to immunoglobulin single variable domains that bind GITR and more in particular to polypeptides that comprise or essentially consist of one or more such immunoglobulin single variable domains; to nucleic acids encoding such polypeptides; to methods for preparing such polypeptides; to compositions and in particular to pharmaceutical compositions that comprise such polypeptides, for prophylactic, therapeutic or diagnostic purposes. In particular, the polypeptides of the present invention enhance the biological activity of GITR.

The present invention relates to non-naturally occurring antibodies or active antibody fragments specifically binding the calcium-sensing receptor (CaSR), acting as positive allosteric modulators (PAMs) to provide for potent therapeutic agents. More particular, the immunoglobulin single variable domains (ISVDs) identified herein reveal a novel therapeutic strategy to reduce parathyroid hormone release in a subject, and are therefore suitable for treatment of hypercalcemia disorders. Moreover, co-application of such an ISVD and a synthetic PAM or calcimimetic results in a synergistic agonistic CaSR activity providing for pharmaceutical compositions as next generation CaSR drugs.

Anti-cancer combination therapies comprising a CTLA-4 blocking agent and a PD-1 blocking agent are disclosed. In particular, combination therapies are disclosed wherein the CTLA-4 blocking agent is an effector-silent anti-CTLA-4 antibody or effector-silent anti-CTLA-4 antibody fragment and the PD-1 blocking agent is an anti-PD-1 or anti-PD-L1 antibody, or antibody fragment thereof.

Disclosed is an anti-IL-4R single-domain antibody and the use thereof. In particular, disclosed are a IL-4R single-domain antibody and a VHH chain thereof, a coding sequence encoding the above-mentioned single-domain antibody or the VHH chain thereof, a corresponding expression vector, host cells capable of expressing the single-domain antibody, and a method for producing the single-domain antibody. The single-domain antibody can specifically recognize human and marmoset IL-4R, but does not recognize mouse IL-4R, and the specificity is good; the single-domain antibody can effectively inhibit the proliferation of TF-1 cells and the activation of a pSTAT6 signaling pathway in cells.

The present invention relates to combination therapies for the treatment of malignancy, particularly myeloid malignancy such as acute myeloid leukemia (AML). The combination therapies may include an antibody molecule that binds to CD70 and at least one antibody molecule that binds to a leukemic stem cell target. Preferred leukemic stem cell targets are TIM-3, IL1R3/IL1RAP and CD47.

Disclosed is a novel CLDN18.2 binding molecule. Also disclosed are a nucleic acid molecule encoding the CLDN18.2 binding molecule, an expression vector and a host cell for expressing the CLDN18.2 binding molecule. Further disclosed are a method for producing the CLDN18.2 binding molecule and use thereof.

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.