Abstract: A method of producing cell derived particles is disclosed. The method comprising isolating cell-derived particles from a biological sample comprising cells modified to present CD24 so as to obtain a preparation of the cell-derived particles substantially devoid of intact cells. Cell derived particles, a culture medium and a cell culture are also disclosed.

Abstract: A method of diagnosing a cancer or a pre-malignant lesion is disclosed. The method comprising determining a level of expression of CD24 on leukocytes comprised in a biological sample of a subject, wherein a level of CD24 on small leukocytes and not on large leukocytes above a predetermined threshold is indicative of the cancer or the pre-malignant lesion. A method of monitoring efficacy of cancer therapy and a kit for diagnosing a cancer or a pre-malignant lesion are also disclosed.

Abstract: A composition comprising cell-derived particles presenting heterologous CD24, wherein the cell is a non-cancerous cell and wherein the composition is substantially devoid of intact cells is disclosed. Methods of producing the cell-derived particles and methods of using the cell-derived particles in treatment of cytokine storm syndrome, tissue injury associated with the inflammation and Coronavirus infection are also disclosed.

Abstract: Xenograft egg models comprising a fertilized non-mammalian egg comprising an ablated immune system, a first plurality of mammalian cells and a second plurality of mammalian cells, wherein the second plurality comprises immune cells are provided. Methods of producing the xenograft egg model as well as using the xenograft egg model for screening are also provided.

Abstract: Provided are nucleic acid constructs and systems which comprise (i) a first nucleic acid construct encoding a toxin operatively linked to a first promoter and at least one cancer-associated signaling responsive enhancer element; and (ii) a second nucleic acid construct encoding an anti-toxin operatively linked to a second promoter, the second promoter being stronger than the first promoter. Also provided are pharmaceutical compositions comprising same and methods of using same for treating cancer.

Abstract: An anti-CD24 antibody is provided. Accordingly, there is provided an antibody comprising an antigen recognition domain which specifically binds CD24 and comprises complementarity determining regions (CDRs) as set forth in SEQ ID NOs: 2, 3 and 4 arranged in a sequential order from N to C on a light chain of the antibody and CDRs as set forth in SEQ ID NOs: 6, 7 and 8 arranged in a sequential order from N to C on a heavy chain of said antibody. Also provided are polynucleotides encoding the antibody, host cells expressing the antibody the uses thereof.

Abstract: Provided are nucleic acid constructs and systems which comprise (i) a first nucleic acid construct encoding a toxin operatively linked to a first promoter and at least one cancer-associated signaling responsive enhancer element; and (ii) a second nucleic acid construct encoding an anti-toxin operatively linked to a second promoter, the second promoter being stronger than the first promoter. Also provided are pharmaceutical compositions comprising same and methods of using same for treating cancer.

Abstract: A composition comprising cell-derived particles presenting heterologous CD24, wherein the cell is a non-cancerous cell and wherein the composition is substantially devoid of intact cells is disclosed. Methods of producing the cell-derived particles and methods of using the cell-derived particles in treatment of cytokine storm syndrome, tissue injury associated with the inflammation and Coronavirus infection are also disclosed.

Abstract: A method of producing cell derived particles is disclosed. The method comprising isolating cell-derived particles from a biological sample comprising cells modified to present CD24 so as to obtain a preparation of the cell-derived particles substantially devoid of intact cells. Cell derived particles, a culture medium and a cell culture are also disclosed.

Abstract: A method of diagnosing high grade bladder cancer is provided. The method comprising detecting in a urine sample of a subject in need thereof expression of CD24, wherein an increase in said expression of CD24 above a predetermined threshold as compared to a control sample is indicative of said high grade bladder cancer.

Abstract: A method of diagnosing a cancer or a pre-malignant lesion is disclosed. The method comprising determining a level of expression of CD24 on leukocytes comprised in a biological sample of a subject, wherein a level of CD24 on small leukocytes and not on large leukocytes above a predetermined threshold is indicative of the cancer or the pre-malignant lesion. A method of monitoring efficacy of cancer therapy and a kit for diagnosing a cancer or a pre-malignant lesion are also disclosed.

Abstract: Provided are methods of improving wound healing in a subject by administering a therapeutically effective amount of CD24. Also provided are pharmaceutical compositions which comprise CD24 being in a formulation with a surfactant and a pharmaceutically acceptable carrier.

Abstract: A cell-free particle is provided. The cell-free particle comprising a nucleic acid sequence encoding a toxin and a nucleic acid sequence encoding an anti-toxin and wherein the particle comprises a targeting moiety for delivery of the particle into a cancer cell.

Abstract: Provided are methods of improving wound healing in a subject by administering a therapeutically effective amount of CD24. Also provided are pharmaceutical compositions which comprise CD24 being in a formulation with a surfactant and a pharmaceutically acceptable carrier.

Abstract: Provided are nucleic acid constructs and systems which comprise (i) a first nucleic acid construct encoding a toxin operatively linked to a first promoter and at least one cancer-associated signaling responsive enhancer element; and (ii) a second nucleic acid construct encoding an anti-toxin operatively linked to a second promoter, the second promoter being stronger than the first promoter. Also provided are pharmaceutical compositions comprising same and methods of using same for treating cancer.