Abstract: Described are novel N- and C-terminally double truncated tau molecules, (“type IA, IB, IIA and IIB tau molecules”) as well as methods for providing these molecules, both from recombinant and biological sources. Moreover, screening methods using these molecules in connection with Alzheimer's diagnosis and therapy are provided.

Abstract: The present invention provides transgenic non-human animals and non-human mammalian somatic and germ cells harboring a human DNA sequence encoding Alzheimer's Disease (AD) derived tau protein, capable of inducing AD pathology in transgenic animals. Alzheimer's tau protein is expressed on specific genetic backgrounds allowing also simulation of different human diseases including hypertension, diabetes, hyper-cholesterolemia, which are associated with neurodegeneration and are considerable risk factors for AD development. Transgenic animals and cells of the invention exhibit neurofibrillary pathology and may serve as in vivo and in vitro assay systems for screening and developing therapeutic and preventive substances and also diagnostic markers and probes for tauopathies and AD.

Abstract: The present invention provides transgenic non-human animals and non-human mammalian somatic and germ cells harbouring a human DNA sequence encoding Alzheimer's Disease (AD) derived tau protein, capable of inducing AD pathology in transgenic animals. Alzheimer's tau protein is expressed on specific genetic backgrounds allowing also simulation of different human diseases including hypertension, diabetes, hyper-cholesterolemia, which are associated with neurodegeneration and are considerable risk factors for AD development. Transgenic animals and cells of the invention exhibit neurofibrillary pathology and may serve as in vivo and in vitro assay systems for screening and developing therapeutic and preventive substances and also diagnostic markers and probes for tauopathies and AD.

Abstract: The present invention provides transgenic non-human animals and non-human mammalian somatic and germ cells harbouring a human DNA sequence encoding Alzheimer's Disease (AD) derived tau protein, capable of inducing AD pathology in transgenic animals. Alzheimer's tau protein is expressed on specific genetic backgrounds allowing also simulation of different human diseases including hypertension, diabetes, hyper-cholesterolemia, which are associated with neurodegeneration and are considerable risk factors for AD development. Transgenic animals and cells of the present invention exhibit neurofibrillary pathology and may serve as in vivo and also in vitro assay systems for screening and developing therapeutic and preventive substances and also diagnostic markers and probes for tauopathies and AD.

Abstract: Described are novel N- and C-terminally double truncated tau molecules, (“type IA, IB, IIA and IIB tau molecules”) as well as methods for providing these molecules, both from recombinant and biological sources. Moreover, screening methods using these molecules in connection with Alzheimer's diagnosis and therapy are provided.