Cited by 91Alzheimer's disease research and treatmentsDementia and Cognitive Impairment ResearchNeuroinflammation and Neurodegeneration Mechanisms

Target engagement in an Alzheimer trial: crenezumab lowers amyloid β oligomers in cerebrospinal fluid

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Yang, Ting, Dang, Yifan, Ostaszewski, Beth, Mengel, David, Steffen, Verena, Rabe, Christina, Bittner, Tobias, Walsh, Dominic M. +1 more·2019·Annals of Neurology

Abstract

OBJECTIVE: Oligomeric forms of amyloid β protein (oAβ) are believed to be principally responsible for neurotoxicity in Alzheimer disease (AD), but it is not known whether anti-Aβ antibodies are capable of lowering oAβ levels in humans. METHODS: We developed an ultrasensitive immunoassay and used it to measure oAβ in cerebrospinal fluid (CSF) from 104 AD subjects participating in the ABBY and BLAZE phase 2 trials of the anti-Aβ antibody crenezumab. Patients received subcutaneous (SC) crenezumab (300mg) or placebo every 2 weeks, or intravenous (IV) crenezumab (15mg/kg) or placebo every 4 weeks for 68 weeks. Ninety-eight of the 104 patients had measurable baseline oAβ levels, and these were compared to levels at week 69 in placebo (n = 28), SC (n = 35), and IV (n = 35) treated patients. RESULTS: Among those receiving crenezumab, 89% of SC and 86% of IV patients had lower levels of oAβ at week 69 versus baseline. The difference in the proportion of patients with decreasing levels was significant for both treatment arms: p = 0.0035 for SC and p = 0.01 for IV crenezumab versus placebo. The median percentage change was -48% in the SC arm and -43% in the IV arm. No systematic change was observed in the placebo group, with a median change of -13% and equivalent portions with negative and positive change. INTERPRETATION: Crenezumab lowered CSF oAβ levels in the large majority of treated patients tested. These results support engagement of the principal pathobiological target in AD and identify CSF oAβ as a novel pharmacodynamic biomarker for use in trials of anti-Aβ agents. ANN NEUROL 2019;86:215-224.

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  • Crenezumab, gantenerumab, and solanezumab are major therapies enrolled for preclinical studies or for at-risk populations, and are also studied in prodromal and very mild Alzheimer's disease patients.

    “Crenezumab, gantenerumab, and solanezumab are the major therapies that are enrolled for preclinical studies or for at-risk populations, while crenezumab, gantenerumab, and solanezumab are the drugs that are for studies in prodromal and very mild AD patients (Yang et al., 2019).”

    From An update on the novel and approved drugs for Alzheimer disease (2022) · cites this paper as Yang et al., 2019

  • Many ongoing mAbs trials are in phase 3, including crenezumab, gantenerumab, and solanezumab in studies for preclinical or at-risk populations.

    “and crenezumab,70 gantenerumab, and solanezumab71 in studies for preclinical or at-risk populations”
  • First results from aducanumab and BAN2401 trials suggested a treatment-related reduction in cerebral amyloid burden in agreement with deceleration of cognitive decline in patients with prodromal and very mild AD.

    “First results from aducanumab and BAN2401 trials suggested, at first, a treatment-related result of reducing in cerebral amyloid burden in agreement to deceleration of cognitive decline in patients with prodromal and very mild AD.71,72”

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  1. [26]Swanson CJ, Zhang Y, Dhadda S, et al. Treatment of early AD subjects with BAN2401, an antiti‐Aß protofibril monoclonnal antibody, significantly clears amyloid plaque and reduces clinical decline. Abstract presented at: Alzheimer's Association International Conference; July 22–26, 2018; Chicago, IL.

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Authors
Yang, T., Dang, Y., Ostaszewski, B., Mengel, D., Steffen, V., Rabe, C., Bittner, T., Walsh, D. M., & Selkoe, D. J.
Affiliations
  • Brigham and Women's Hospital (US)
  • Genentech (US)
Corresponding author
  • Walsh, Dominic M.
  • Selkoe, Dennis J.
Venue
Annals of Neurology
Publisher
Wiley
Published
2019-06-22
Volume
86
Issue
2
Pages
215-224
ISSN
  • 0364-5134 (ISSN-L)
  • 1531-8249
OpenAlex
W2948149572
Cited by
91
References
26
Citations by year
2026: 2 · 2025: 9 · 2024: 11 · 2023: 11 · 2022: 14 · 2021: 16 · 2020: 22 · 2019: 5
FWCI
9.77
Type
journal article
Language
en
Open access
Locations
  • Annals of Neurology (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
  • Harvard NeuroDiscovery Center
  • Brigham and Women's Hospital
  • National Institute on Aging (AG006173 (Selkoe), AG015739 (Selkoe), AG046275 (Wa)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
crenezumab, amyloid-beta oligomers, Alzheimer's disease, anti-amyloid antibodies, cerebrospinal fluid biomarkers, pharmacodynamic biomarkers, target engagement, subcutaneous administration, intravenous administration, immunoassay
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Female, Humans, Male, Middle Aged, Biomarkers, Amyloid beta-Peptides, Drug Delivery Systems, Antibodies, Monoclonal, Humanized

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