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We previously reported that preeclampsia (PE), a severe pregnancy complication, is another proteinopathy disorder with impaired autophagy. We hypothesized that induced autophagy deficiency would promote accumulation of pathologic protein aggregates. Here, we describe a novel, sensitive assay that detects serum protein aggregates from patients with PE (n\u2009=\u200933 early onset and 33 late onset) and gestational age-matched controls (n\u2009=\u200977) as well as AD in both dementia and prodromal mild cognitive impairment (MCI, n\u2009=\u200924) stages with age-matched controls (n\u2009=\u200919). The assay employs exposure of genetically engineered, autophagy-deficient human trophoblasts (ADTs) to serum from patients. The aggregated protein complexes and their individual components, including transthyretin, amyloid \u03b2-42, \u03b1-synuclein, and phosphorylated tau231, can be detected and quantified by co-staining with ProteoStat, a rotor dye with affinity to aggregated proteins, and respective antibodies. Detection of protein aggregates in ADTs was not dependent on transcriptional upregulation of these biomarkers. The ROC curve analysis validated the robustness of the assay for its specificity and sensitivity (PE; AUC: 1, CI: 0.949\u20131.00; AD; AUC: 0.986, CI: 0.832\u20131.00). In conclusion, we have developed a novel, noninvasive diagnostic and predictive assay for AD, MCI and PE.<\/jats:p>","DOI":"10.1038\/s41598-021-95611-5","type":"journal-article","created":{"date-parts":[[2021,8,5]],"date-time":"2021-08-05T06:02:50Z","timestamp":1628143370000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":36,"title":["Novel blood test for early biomarkers of preeclampsia and Alzheimer\u2019s disease"],"prefix":"10.1038","volume":"11","author":[{"given":"Shibin","family":"Cheng","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sayani","family":"Banerjee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lori A.","family":"Daiello","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akitoshi","family":"Nakashima","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sukanta","family":"Jash","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zheping","family":"Huang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jonathan D.","family":"Drake","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jan","family":"Ernerudh","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Goran","family":"Berg","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"James","family":"Padbury","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shigeru","family":"Saito","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Brian R.","family":"Ott","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Surendra","family":"Sharma","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,8,5]]},"reference":[{"key":"95611_CR1","doi-asserted-by":"publisher","first-page":"237","DOI":"10.1038\/nrd3050","volume":"9","author":"A Aguzzi","year":"2010","unstructured":"Aguzzi, A. & O\u2019Connor, T. 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