Proteopathy
![Micrograph of a section of the cerebral cortex from a patient with Alzheimer's disease, immunostained with an antibody to Aβ (brown), a protein fragment that accumulates in senile plaques and cerebral amyloid angiopathy. 10X microscope objective.](/Images/godic/202502/04/Proteopathy_Abeta_deposits_in_Alzheimer_disease0438.jpg")
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In medicine, proteopathy (Proteo- [pref. protein]; -pathy [suff. disease]; proteopathies pl.; proteopathic adj.) refers to a class of diseases in which certain proteins become structurally abnormal, and thereby disrupt the function of cells, tissues and organs of the body. Often the proteins fail to fold into their normal configuration; in this misfolded state, the proteins can become toxic in some way (a gain of toxic function) or they can lose their normal function. The proteopathies (also known as proteinopathies, protein conformational disorders, or protein misfolding diseases) include such diseases as Creutzfeldt–Jakob disease, Alzheimer's disease, Parkinson's disease, prion disease, amyloidosis, and a wide range of other disorders (see List of Proteopathies).