RESUMEN
Abnormal calcium signaling is a central pathological component of Alzheimer's disease (AD). Here, we describe the identification of a class of compounds called ReS19-T, which are able to restore calcium homeostasis in cell-based models of tau pathology. Aberrant tau accumulation leads to uncontrolled activation of store-operated calcium channels (SOCCs) by remodeling septin filaments at the cell cortex. Binding of ReS19-T to septins restores filament assembly in the disease state and restrains calcium entry through SOCCs. In amyloid-ß and tau-driven mouse models of disease, ReS19-T agents restored synaptic plasticity, normalized brain network activity, and attenuated the development of both amyloid-ß and tau pathology. Our findings identify the septin cytoskeleton as a potential therapeutic target for the development of disease-modifying AD treatments.
Asunto(s)
Enfermedad de Alzheimer , Péptidos beta-Amiloides , Calcio , Homeostasis , Fármacos Neuroprotectores , Septinas , Proteínas tau , Animales , Humanos , Ratones , Enfermedad de Alzheimer/tratamiento farmacológico , Enfermedad de Alzheimer/metabolismo , Péptidos beta-Amiloides/metabolismo , Calcio/metabolismo , Canales de Calcio/metabolismo , Señalización del Calcio/efectos de los fármacos , Citoesqueleto/metabolismo , Citoesqueleto/efectos de los fármacos , Modelos Animales de Enfermedad , Plasticidad Neuronal/efectos de los fármacos , Fármacos Neuroprotectores/farmacología , Fármacos Neuroprotectores/uso terapéutico , Septinas/metabolismo , Proteínas tau/metabolismoRESUMEN
Screening of a pteridine-based compound library led to the identification of compounds exhibiting immunosuppressive as well as anti-inflammatory activity. Optimization afforded a series of 2-amino-4-N-piperazinyl-6-(3,4-dimethoxyphenyl)pteridine analogues. The most potent congeners in this series displayed low nM IC(50) values in the Mixed Lymphocyte Reaction (MLR) assay. In addition, these compounds also have potent anti-inflammatory activity as measured in the Tumor Necrosis Factor (TNF) assay.