Abstract: Provided are a CAR library used to screen scFvs that can be functional in CAR-T cells, and an scFv manufacturing method in which the CAR library is used. A chimeric antigen receptor (CAR) library of the present invention includes nucleic acids coding for first CARs. Each of the first CARs includes a first antigen-binding domain, a first transmembrane domain, and a first intracellular signaling domain. The first antigen-binding domain includes a first single-chain antibody (scFv) to be screened for the ability to bind to a target antigen. The first scFv includes a first heavy-chain variable region and a first light-chain variable region. The first heavy-chain variable region and the first light-chain variable region meet a predetermined condition.

Abstract: A method for determining prognosis in a subject having a hematological cancer comprising: a) determining an expression profile by measuring the gene expression levels of a set of genes selected from a leukemic stem cell (LSC) gene signature marker set or an hematopoietic stem cell (HSC) gene signature marker set, in a sample from a subject; and b) classifying the subject as having a good prognosis or a poor prognosis based on the expression profile; wherein a good prognosis predicts an increased likelihood of survival within a predetermined period after initial diagnosis and poor prognosis predicts a decreased likelihood of survival within the predetermined period after initial diagnosis.

Abstract: The invention relates to modulating the SIRP?-CD47 interaction in order to increase hematopoietic stem cell engraftment and compounds therefor. In some embodiments, there is provided isolated SIRP? and CD47 polypeptides, fragments and fusion proteins for enhancing hematopoietic stem cell engraftment. Further there is provided methods for increasing hematopoietic stem cell engraftment through administration of the above polypeptides.