{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T01:29:24Z","timestamp":1791336564001,"version":"4.3.1"},"reference-count":52,"publisher":"American Medical Association (AMA)","issue":"5","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Netw Open"],"abstract":"<jats:sec id=\"ab-zoi250325-4\">\n                    <jats:title>Importance<\/jats:title>\n                    <jats:p>\n                      Scarce population-based data exist on whether\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      modifies associations of blood-based neurodegenerative biomarkers with cognitive decline, particularly in a diverse, biracial population of community-dwelling older adults without dementia.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-zoi250325-5\">\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>\n                      To assess whether\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      carrier status is associated with an accelerated rate of cognitive decline in older adults without dementia and with elevated neurodegenerative burden.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-zoi250325-6\">\n                    <jats:title>Design, Setting, and Participants<\/jats:title>\n                    <jats:p>\n                      This 20-year prospective cohort study started in 1993 and was conducted through 2012 on the South Side of Chicago among community-dwelling older adults without dementia from the longitudinal biracial Chicago Health and Aging Project. The interaction of\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      carrier status with prospective associations of serum neurodegenerative biomarkers with global cognitive decline was examined using a mixed-effects regression model, adjusting for demographics and chronic health conditions. Statistical analyses were conducted from June 2024 to January 2025.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-zoi250325-7\">\n                    <jats:title>Exposure<\/jats:title>\n                    <jats:p>\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      carrier status and serum biomarker levels for total tau (t-tau), neurofilament light (NfL) chain, and glial fibrillary acidic protein (GFAP) measured with a Quanterix Neuroplex kit at baseline.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-zoi250325-8\">\n                    <jats:title>Main Outcomes and Measures<\/jats:title>\n                    <jats:p>Cognitive decline calculated from composite global cognition scores across study waves.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-zoi250325-9\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      Among 1038 community-dwelling older adults (mean [SD] age, 77.1 [5.9] years; 615 Black [59.2%] and 423 White [40.8%]; 651 female [62.7%]), there was a mean (SD) of 12.8 (3.4) years of education and 343 individuals (33.0%) were\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      carriers. Higher levels of blood-based neurodegenerative biomarkers (ie, t-tau, NfL, and GFAP) were associated with a faster rate of cognitive decline among\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      carriers than noncarriers. Specifically, compared with noncarriers,\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      carriers had annual rates of cognitive decline per 1\u2013log\n                      <jats:sub>10<\/jats:sub>\n                      unit higher levels in t-tau and GFAP that were accelerated by a \u03b2 (SD) of \u22120.03 (0.02) (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.046) and \u22120.07 (0.03) (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.02), respectively. Similarly, compared with noncarriers and participants in the lower NfL tertile,\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      carriers with middle and upper tertiles of NfL levels experienced accelerated cognitive decline, with a \u03b2 (SD) of \u22120.04 (0.02) (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.006) and \u22120.03 (0.02) (\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      \u2009=\u2009.07), respectively, although the difference was not significant for upper tertiles.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"ab-zoi250325-10\">\n                    <jats:title>Conclusions and Relevance<\/jats:title>\n                    <jats:p>\n                      This study found that higher levels of neurodegeneration (t-tau), axonal injury (NfL), and reactive astrocytes and neuroinflammation (GFAP) biomarkers were associated with accelerated cognitive decline in genetically susceptible\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      carriers. These findings highlight the association of\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      with exacerbation of neurodegenerative processes, with not only significant implications for understanding and tracking the progression of neurodegenerative diseases, but also a call for inclusivity of\n                      <jats:italic toggle=\"yes\">APOE4<\/jats:italic>\n                      status in scientific investigations and clinical trials.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1001\/jamanetworkopen.2025.8903","type":"journal-article","created":{"date-parts":[[2025,5,7]],"date-time":"2025-05-07T11:48:29Z","timestamp":1746618509000},"page":"e258903","source":"Crossref","is-referenced-by-count":28,"title":["<i>APOE4<\/i>\n                    , Blood Neurodegenerative Biomarkers, and Cognitive Decline in Community-Dwelling Older Adults"],"prefix":"10.1001","volume":"8","author":[{"given":"Ted K. 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