Abstract: It is intended to provide an inhibitor for the formation of a ?-secretase complex which comprises a cholesterol synthesis inhibitor or a protein geranylgeranylation regulator as the active ingredient; and use of a cholesterol synthesis inhibitor or a protein geranylgeranylation regulator for producing the same. It is also intended to provide a method of screening a substance having an effect of inhibiting the formation of an active complex of ?-secretase which comprises assaying the activity of inhibiting cholesterol synthesis or quantifying cholesterol accumulated in lipid rafts in cells. It is also intended to provide a method of screening a cholesterol synthesis inhibitor, a protein geranylgeranylation regulator or an HMG-CoA reductase inhibitor which comprises assaying the effect of inhibiting the formation of an active complex of ?-secretase.

Abstract: To provide a therapeutic drug for Alzheimer's disease and/or a cancer. The therapeutic drug for Alzheimer's disease and/or a cancer contains an anti-nicastrin antibody, a derivative of the antibody, or a fragment of the antibody or the derivative.

Abstract: To provide a therapeutic drug for Alzheimer's disease and/or a cancer. The therapeutic drug for Alzheimer's disease and/or a cancer contains an anti-nicastrin antibody, a derivative of the antibody, or a fragment of the antibody or the derivative.

Abstract: To provide a therapeutic drug for Alzheimer's disease and/or a cancer. The therapeutic drug for Alzheimer's disease and/or a cancer contains an anti-nicastrin antibody, a derivative of the antibody, or a fragment of the antibody or the derivative.

Abstract: To provide a therapeutic drug for Alzheimer's disease and/or a cancer. The therapeutic drug for Alzheimer's disease and/or a cancer contains an anti-nicastrin antibody, a derivative of the antibody, or a fragment of the antibody or the derivative.

Abstract: It is intended to provide an inhibitor for the formation of a ?-secretase complex which comprises a cholesterol synthesis inhibitor or a protein geranylgeranylation regulator as the active ingredient; and use of a cholesterol synthesis inhibitor or a protein geranylgeranylation regulator for producing the same. It is also intended to provide a method of screening a substance having an effect of inhibiting the formation of an active complex of ?-secretase which comprises assaying the activity of inhibiting cholesterol synthesis or quantifying cholesterol accumulated in lipid rafts in cells. It is also intended to provide a method of screening a cholesterol synthesis inhibitor, a protein geranylgeranylation regulator or an HMG-CoA reductase inhibitor which comprises assaying the effect of inhibiting the formation of an active complex of ?-secretase.

Abstract: To provide a therapeutic drug for Alzheimer's disease and/or a cancer. The therapeutic drug for Alzheimer's disease and/or a cancer contains an anti-nicastrin antibody, a derivative of the antibody, or a fragment of the antibody or the derivative.

Abstract: It is intended to provide an inhibitor for the formation of a ?-secretase complex which comprises a cholesterol synthesis inhibitor or a protein geranylgeranylation regulator as the active ingredient; and use of a cholesterol synthesis inhibitor or a protein geranylgeranylation regulator for producing the same. It is also intended to provide a method of screening a substance having an effect of inhibiting the formation of an active complex of ?-secretase which comprises assaying the activity of inhibiting cholesterol synthesis or quantifying cholesterol accumulated in lipid rafts in cells. It is also intended to provide a method of screening a cholesterol synthesis inhibitor, a protein geranylgeranylation regulator or an HMG-CoA reductase inhibitor which comprises assaying the effect of inhibiting the formation of an active complex of ?-secretase.