COL17A1 and dementia: The association between BP autoantibodies and dementia has also been shown in a French study of 69 dementia patients and 69 controls (aged over 69 years)26 in which BP180 autoantibodies were detected in 7% of subjects with dementia (Mini-Mental State Examination, [MMSE] score ≤24), but not in controls (MMSE score >24).