Evidence map›Paper›PMID 19561302›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2009

ANO2 is the cilial calcium-activated chloride channel that may mediate olfactory amplification.

Aaron B Stephan, Eleen Y Shum, Sarah Hirsh, Katherine D Cygnar, Johannes Reisert, Haiqing Zhao

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 201 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
201citing papers in PubMed, 1 pooled it
10.8field-weighted citation impact, top 1% 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

201 citing papers in PubMed, 1 synthesis or guideline pooled it, 346 citations in OpenAlex.

  1. Pooled it
  2. Anoctamin 2 deletion alters dopamine-related signaling and impairs inhibitory behavioral control in mice.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2026
    Article
  3. Article
  4. Review
  5. Review
  6. Review
  7. Review
  8. Review
  9. The function of chloride channels in digestive system disease (Review).International journal of molecular medicine · 2025
    Review
  10. [Transmembrane protein 16A--a new target for the treatment of airway inflammatory diseases].Lin chuang er bi yan hou tou jing wai ke za zhi = Journal of clinical otorhinolaryngology head and neck surgery · 2025
    Review
  11. Amplification of Olfactory Transduction Currents Implements Sparse Stimulus Encoding.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025
    Article
  12. Article
  13. Article
  14. Article
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  16. The CaThe Journal of physiology · 2024
    Article
  17. NAD activates olfactory receptor 1386 to regulate type I interferon responses inProceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  18. Article
  19. Article
  20. Review

141 more citing papers are in PubMed but not listed here.

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 3 institutions in 1 country.

Aaron B StephanDepartment of Biology, The Johns Hopkins University School of Medicine, Baltimore, MD 21218, USA.
Eleen Y Shum
Sarah Hirsh
Katherine D Cygnar
Johannes Reisert
Haiqing Zhao
Johns Hopkins University · USJohns Hopkins Medicine · USMonell Chemical Senses Center · US

Funding

Regulation of Olfactory Signal TransductionR01DC007395 · NIDCD · JOHNS HOPKINS UNIVERSITY · PI ZHAO, HAIQING · 2008 to 2016
$3.5M
NIDCD NIH HHS DC007395NIDCD NIH HHS R01 DC007395
6 · The paper itself

Abstract

For vertebrate olfactory signal transduction, a calcium-activated chloride conductance serves as a major amplification step. However, the molecular identity of the olfactory calcium-activated chloride channel (CaCC) is unknown. Here we report a proteomic screen for cilial membrane proteins of mouse olfactory sensory neurons (OSNs) that identified all the known olfactory transduction components as well as Anoctamin 2 (ANO2). Ano2 transcripts were expressed specifically in OSNs in the olfactory epithelium, and ANO2::EGFP fusion protein localized to the OSN cilia when expressed in vivo using an adenoviral vector. Patch-clamp analysis revealed that ANO2, when expressed in HEK-293 cells, forms a CaCC and exhibits channel properties closely resembling the native olfactory CaCC. Considering these findings together, we propose that ANO2 constitutes the olfactory calcium-activated chloride channel.

Indexed as

AnimalsAnoctaminsCell LineChloride ChannelsCiliaHumansMembrane ProteinsMiceOlfactory Receptor NeuronsPatch-Clamp TechniquesProteomicsSignal TransductionSmellANO2 protein, mouseAnoctaminsChloride ChannelsMembrane Proteins

Identifiers

PMID19561302
PMCPMC2702256
OpenAlexW2032864009

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.