Abstract: The present invention is directed to compositions and methods for measuring enzymatic activity, particularly glycosidase activity. Methods of the present invention include assays for quantitatively determining the amount of glycosidase activity in a sample. The present invention also provides methods for the diagnosis of metastatic and inflammatory processes in vitro and in vivo. The present invention further provides compositions and methods for high throughput assays for identifying compounds that effect glycosidase activity.

Abstract: This invention also provides a method of treating atherosclerosis in a subject, comprising administering to the subject an effective amount of a substance capable of binding to the amino-terminal region of apolipoprotein B, thereby treating the atherosclerosis. This invention also provides a method for inhibiting the binding of low density lipoprotein to blood vessel matrix in a subject, comprising administering to the subject an effective amount of a substance capable of competing with the amino-terminal region of apolipoprotein B for binding to blood vessel matrix, thereby inhibiting the binding of low density lipoprotein to blood vessel matrix. This invention also provides a method for identifying a compound capable of ameliorating atherosclerosis. Additionally, this invention provides a kit for inhibiting the binding of low density lipoprotein to blood vessel matrix, wherein the kit comprises a substance capable of binding to the amino-terminal region of apolipoprotein B.