Evidence map›Paper›PMID 33190318›Full record

ReviewThe European journal of neuroscience2021

Locus coeruleus in memory formation and Alzheimer's disease.

Tony James, Bartosz Kula, Seowon Choi, Shahzad S Khan, Lane K Bekar, Nathan A Smith

Open access · hybridAbstract readReview
In one paragraph

Review in The European journal of neuroscience, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 1 pooled it
2.8field-weighted citation impact, top 8% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

36 citing papers in PubMed, 1 synthesis or guideline pooled it, 55 citations in OpenAlex.

  1. Pooled it
  2. Modulation of the noradrenergic system using transcranial ultrasonic stimulation targeted to the brainstem locus coeruleus in awake mice.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026
    Article
  3. Article
  4. Sex differences in neuromodulatory subcortical systems and their implications for Alzheimer's disease.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Review
  5. Sex and life experience shape locus coeruleus pretangle tau pathology.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2026
    Article
  6. Review
  7. Review
  8. Review
  9. Article
  10. Article
  11. Review
  12. Mechanisms of comorbidity between Alzheimer's disease and pain.Alzheimer's & dementia : the journal of the Alzheimer's Association · 2025
    Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. A locus coeruleus to dorsal hippocampus pathway mediates cue-induced reinstatement of opioid self-administration in male and female rats.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2024
    Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 4 institutions in 2 countries.

Tony JamesGeorge Washington University School of Medicine and Health Sciences, Washington, DC, USA.
Bartosz KulaCenter for Neuroscience, Children's National Research Institute, Children's National Hospital, Washington, DC, USA.
Seowon ChoiCenter for Neuroscience, Children's National Research Institute, Children's National Hospital, Washington, DC, USA.
Shahzad S KhanDepartment of Biochemistry, Stanford University, Stanford, CA, USA.ORCID 0000-0003-3962-0226
Lane K BekarDepartment of Anatomy, Physiology and Pharmacology, University of Saskatchewan, Saskatoon, Canada.
Nathan A SmithGeorge Washington University School of Medicine and Health Sciences, Washington, DC, USA.ORCID 0000-0002-9254-5360
Children's National · USGeorge Washington University · USStanford University · USUniversity of Saskatchewan · CA

Funding

Astrocytes Modulate Synaptic Plasticity via NorepinephrineK01NS110981 · NINDS · UNIVERSITY OF ROCHESTER · PI SMITH, NATHAN A · 2019 to 2024
$1.1M
NINDS NIH HHS K01 NS110981
6 · The paper itself

Abstract

Catecholamine neurons of the locus coeruleus (LC) in the dorsal pontine tegmentum innervate the entire neuroaxis, with signaling actions implicated in the regulation of attention, arousal, sleep-wake cycle, learning, memory, anxiety, pain, mood, and brain metabolism. The co-release of norepinephrine (NE) and dopamine (DA) from LC terminals in the hippocampus plays a role in all stages of hippocampal-memory processing. This catecholaminergic regulation modulates the encoding, consolidation, retrieval, and reversal of hippocampus-based memory. LC neurons in awake animals have two distinct firing modes: tonic firing (explorative) and phasic firing (exploitative). These two firing modes exert different modulatory effects on post-synaptic dendritic spines. In the hippocampus, the firing modes regulate long-term potentiation (LTP) and long-term depression, which differentially regulate the mRNA expression and transcription of plasticity-related proteins (PRPs). These proteins aid in structural alterations of dendritic spines, that is, structural long-term potentiation (sLTP), via expansion and structural long-term depression (sLTD) via contraction of post-synaptic dendritic spines. Given the LC's role in all phases of memory processing, the degeneration of 50% of the LC neuron population occurring in Alzheimer's disease (AD) is a clinically relevant aspect of disease pathology. The loss of catecholaminergic regulation contributes to dysfunction in memory processes along with impaired functions associated with attention and task completion. The multifaceted role of the LC in memory and general task performance and the close correlation of LC degeneration with neurodegenerative disease progression together implicate it as a target for new clinical assessment tools.

Indexed as

Alzheimer DiseaseNeurodegenerative DiseasesAnimalsLocus CoeruleusLong-Term PotentiationMemoryAlzheimer's diseasedopaminelocus coeruleusmemorynorepinephrine

Identifiers

PMID33190318
PMCPMC8121900
OpenAlexW3102210705

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.