Abstract: The present invention relates to animal model systems comprising a chimera between an avian embryo and a mammalian organism. Specifically, chimeric model systems comprising normal, diseased or genetically transformed mammalian cells and tissues transplanted into avian embryos, and uses thereof for in vivo testing of drugs and therapeutic modalities are disclosed.

Abstract: The present invention relates to animal model systems comprising a chimera between an avian embryo and a mammalian organism. Specifically, chimeric model systems comprising normal, diseased or genetically transformed mammalian cells and tissues transplanted into avian embryos, and uses thereof for in vivo testing of drugs and therapeutic modalities are disclosed.

Abstract: The present invention describes the use of an AChE-R-derived peptide, also known as ARP, as an inducer of hemopoietic cell differentiation and expansion, specifically for the granulocytic population. In addition, the use of ARP as an inducer of thrombopoietin and pro-inflammatory cytokines is also presented. ARP may further be used in the pre-transplant priming of hematopoietic stem cells. Other uses and methods utilizing ARP are also described herein.

Abstract: The present invention describes the use of an AChE-R-derived peptide, also known as ARP, as an inducer of hemopoietic cell differentiation and expansion, specifically for the granulocytic population. In addition, the use of ARP as an inducer of thrombopoietin and pro-inflammatory cytokines is also presented. ARP may further be used in the pre-transplant priming of hematopoietic stem cells. Other uses and methods utilizing ARP are also described herein.

Abstract: The present invention relates to animal model systems comprising a chimera between an avian embryo and a mammalian organism. Specifically, chimeric model systems comprising normal, diseased or genetically transformed mammalian cells and tissues transplanted into avian embryos, and uses thereof for in vivo testing of drugs and therapeutic modalities are disclosed.

Abstract: The present invention describes the use of an AChE-R-derived peptide, also known as ARP, as an inducer of hemopoietic cell differentiation and expansion, specifically for the granulocytic population. In addition, the use of ARP as an inducer of thrombopoietin and pro-inflammatory cytokines is also presented. ARP may further be used in the pre-transplant priming of hematopoietic stem cells. Other uses and methods utilizing ARP are also described herein.

Abstract: The invention relates to a cell growth and/or differentiation regulatory peptide comprising a sequence of about 9 to about 150 amino acids derived from acetylcholinesterase amino acid sequence, preferably from the C-terminal region of acetylcholinesterase. The invention also relates to pharmaceutical compositions comprising the peptides, particularly for use in promoting survival of stem cells, promoting differentiation of stem cells, promoting growth of stem cells and/or promoting the growth-enhancing effect of a growth factor on stem cells, alone, or in combination with other growth factors. Of particular interest is the use of the peptides in the treatment of thrombocytopenia, post-irradiation conditions, post-chemotherapy conditions, or conditions following massive blood loss and promotion of neural progenitors in use for cell therapies aimed at restoring neural functions in diseased individuals.