Evidence map›Paper›PMID 31805848›Full record

ArticleBMC genomics2019

Massive expansion and diversity of nicotinic acetylcholine receptors in lophotrochozoans.

Yu Jiao, Yanfei Cao, Zhe Zheng, Ming Liu, Ximing Guo

Open access · goldAbstract read
In one paragraph

Article in BMC genomics, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
2.5field-weighted citation impact, top 10% 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

17 citing papers in PubMed, 49 citations in OpenAlex.

  1. MolluscaGenes: A Transcriptomic Database for the Mollusca.bioRxiv : the preprint server for biology · 2026
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  9. The evolution of synaptic and cognitive capacity: Insights from the nervous system transcriptome ofProceedings of the National Academy of Sciences of the United States of America · 2022
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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

5 authors at 2 institutions in 3 countries.

Yu JiaoFishery College, Guangdong Ocean University, Zhanjiang, 524025, Guangdong, China.
Yanfei CaoFishery College, Guangdong Ocean University, Zhanjiang, 524025, Guangdong, China.
Zhe ZhengFishery College, Guangdong Ocean University, Zhanjiang, 524025, Guangdong, China.
Ming LiuHaskin Shellfish Research Laboratory, Department of Marine and Coastal Sciences, Rutgers University, 6959 Miller Avenue, Port Norris, NJ, 08349, USA.
Ximing GuoHaskin Shellfish Research Laboratory, Department of Marine and Coastal Sciences, Rutgers University, 6959 Miller Avenue, Port Norris, NJ, 08349, USA. xguo@hsrl.rutgers.edu.ORCID http://orcid.org/0000-0002-6758-2709
Rutgers, The State University of New Jersey · USGuangdong Ocean University · CN

Funding

National Institute of Food and Agriculture 2015-70007-24245National Natural Science Foundation of China 31672626
6 · The paper itself

Abstract

backgroundNicotinic acetylcholine receptors (nAChRs) are among the oldest and most conserved transmembrane receptors involved in signal transduction. Despite the prevalence and significance of cholinergic signaling, the diversity and evolution of nAChRs are not fully understood.

resultBy comparative genomic analysis, we found massive expansions of nAChR genes in molluscs and some other lophotrochozoans. The expansion is particularly pronounced in stationary bivalve molluscs with simple nervous systems, with the number of nAChR genes ranging from 99 to 217 in five bivalves, compared with 10 to 29 in five ecdysozoans and vertebrates. The expanded molluscan nAChR genes tend to be intronless and in tandem arrays due to retroposition followed by tandem duplication. Phylogenetic analysis revealed diverse nAChR families in the common ancestor of bilaterians, which subsequently experienced lineage-specific expansions or contractions. The expanded molluscan nAChR genes are highly diverse in sequence, domain structure, temporal and spatial expression profiles, implying diversified functions. Some molluscan nAChR genes are expressed in early development before the development of the nervous system, while others are involved in immune and stress responses.

conclusionThe massive expansion and diversification of nAChR genes in bivalve molluscs may be a compensation for reduced nervous systems as part of adaptation to stationary life under dynamic environments, while in vertebrates a subset of specialized nAChRs are retained to work with advanced nervous systems. The unprecedented diversity identified in molluscs broadens our view on the evolution and function of nAChRs that are critical to animal physiology and human health.

Indexed as

AnimalsEvolution, MolecularGene DuplicationGene Expression ProfilingGene Expression RegulationHumansIntronsMolluscaMultigene FamilyPhylogenyProtein DomainsReceptors, NicotinicReceptors, NicotinicAdaptationBivalveCholinergic signalingGene expansionMolluscaNicotinic acetylcholine receptorsOysterRetropositionTandem duplication

Identifiers

PMID31805848
PMCPMC6896357
OpenAlexW2991743752

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Registered trials

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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.