Evidence map›Paper›PMID 22986497›Full record

ArticleThe Journal of cell biology2012

Temporal sampling, resetting, and adaptation orchestrate gradient sensing in sperm.

Nachiket D Kashikar, Luis Alvarez, Reinhard Seifert, Ingo Gregor, Oliver Jäckle, Michael Beyermann, Eberhard Krause, U Benjamin Kaupp

Abstract read
In one paragraph

Article in The Journal of cell biology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing 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

21 citing papers in PubMed.

  1. Review
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  5. Article
  6. A hydrodynamic-stochastic model of chemotactic ciliated microorganisms.The European physical journal. E, Soft matter · 2019
    Article
  7. Article
  8. Article
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  16. Article
  17. Intracellular pH in sperm physiology.Biochemical and biophysical research communications · 2014
    Review
  18. Article
  19. Article
  20. 100 years of sperm chemotaxis.The Journal of general physiology · 2012
    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

8 authors.

Nachiket D KashikarDepartment of Molecular Sensory Systems, Center of Advanced European Studies and Research, 53175 Bonn, Germany.
Luis Alvarez
Reinhard Seifert
Ingo Gregor
Oliver Jäckle
Michael Beyermann
Eberhard Krause
U Benjamin Kaupp

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Sperm, navigating in a chemical gradient, are exposed to a periodic stream of chemoattractant molecules. The periodic stimulation entrains Ca(2+) oscillations that control looping steering responses. It is not known how sperm sample chemoattractant molecules during periodic stimulation and adjust their sensitivity. We report that sea urchin sperm sampled molecules for 0.2-0.6 s before a Ca(2+) response was produced. Additional molecules delivered during a Ca(2+) response reset the cell by causing a pronounced Ca(2+) drop that terminated the response; this reset was followed by a new Ca(2+) rise. After stimulation, sperm adapted their sensitivity following the Weber-Fechner law. Taking into account the single-molecule sensitivity, we estimate that sperm can register a minimal gradient of 0.8 fM/µm and be attracted from as far away as 4.7 mm. Many microorganisms sense stimulus gradients along periodic paths to translate a spatial distribution of the stimulus into a temporal pattern of the cell response. Orchestration of temporal sampling, resetting, and adaptation might control gradient sensing in such organisms as well.

Indexed as

AnimalsCalciumCalcium SignalingChemotactic FactorsDifferential ThresholdMaleSea UrchinsSignal TransductionSpermatozoaSperm MotilityCalciumChemotactic Factors

Identifiers

PMID22986497
PMCPMC3444779

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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.