Evidence map›Paper›PMID 23325727›Full record

ArticleLearning & memory (Cold Spring Harbor, N.Y.)2013

The FMRFamide-related neuropeptide FLP-20 is required in the mechanosensory neurons during memory for massed training in C. elegans.

Chris Li, Tiffany A Timbers, Jacqueline K Rose, Tahereh Bozorgmehr, Andrea McEwan, Catharine H Rankin

Open access · diamondAbstract read
In one paragraph

Article in Learning & memory (Cold Spring Harbor, N.Y.), 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
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

15 citing papers in PubMed, 30 citations in OpenAlex.

  1. Article
  2. Neuropeptides Involved in Elicited Reversal Speed Plasticity inbioRxiv : the preprint server for biology · 2025
    Article
  3. Journal of biosciences · 2025
    Review
  4. Article
  5. Review
  6. Article
  7. Article
  8. Article
  9. Article
  10. Mechanosensory molecules and circuits in C. elegans.Pflugers Archiv : European journal of physiology · 2015
    Review
  11. Article
  12. Article
  13. Review
  14. The FMRFamide-Like Peptide Family in Nematodes.Frontiers in endocrinology · 2014
    Review
  15. 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 2 institutions in 2 countries.

Chris LiDepartment of Biology, City College of the City University of New York, NY 10031, USA. cli@sci.ccny.cuny.edu
Tiffany A Timbers
Jacqueline K Rose
Tahereh Bozorgmehr
Andrea McEwan
Catharine H Rankin
University of British Columbia · CACity University of New York · US

Funding

Function of a Neuropeptide Gene Family in C. elegansR01NS042459 · NINDS · CITY COLLEGE OF NEW YORK · PI LI, CHRISTINE · 2002 to 2006
$1.4M
NINDS NIH HHS R01 NS042459
6 · The paper itself

Abstract

Lasting memories are likely to result from a lasting change in neurotransmission. In the nematode Caenorhabditis elegans, spaced training with a tap stimulus induces habituation to the tap that lasts for >24 h and is dependent on glutamate transmission, postsynaptic AMPA receptors, and CREB. Here we describe a distinct, presynaptic mechanism for a shorter lasting memory for tap habituation induced by massed training. We report that a FMRFamide-related peptide (FMRF = Phe-Met-Arg-Phe-NH(2)), FLP-20, is critical for memory lasting 12 h following massed training, but is not required for other forms of memory. Massed training correlated with a flp-20-dependent increase in synaptobrevin tagged with green fluorescent protein in the presynaptic terminals of the PLM mechanosensory neurons that followed the timeline of the memory trace. We also demonstrated that flp-20 is required specifically in the mechanosensory neurons for memory 12 h after massed training. These findings show that within the same species and form of learning, memory is induced by distinct mechanisms to create a lasting alteration in neurotransmission that is dependent upon the temporal pattern of training: memory of spaced training results from postsynaptic changes in the interneurons of the neural circuit, whereas memory of massed training results from presynaptic changes in the mechanosensory neurons of the neural circuit.

Indexed as

AnimalsAnimals, Genetically ModifiedCaenorhabditis elegansCaenorhabditis elegans ProteinsFMRFamideGreen Fluorescent ProteinsHabituation, PsychophysiologicLearningLocomotionMechanoreceptorsMemoryMutationNeuropeptidesSpace PerceptionTime FactorsCaenorhabditis elegans ProteinsFMRFamideGreen Fluorescent ProteinsNeuropeptides

Identifiers

PMID23325727
PMCPMC3549060
OpenAlexW2125478399

What OpenQuestion holds

Textmetadata
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.