Evidence map›Paper›PMID 19666827›Full record

ArticleDevelopment (Cambridge, England)2009

hnRNP I is required to generate the Ca2+ signal that causes egg activation in zebrafish.

Wenyan Mei, Karen W Lee, Florence L Marlow, Andrew L Miller, Mary C Mullins

Abstract read
In one paragraph

Article in Development (Cambridge, England), 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
4.3field-weighted citation impact, top 7% 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

25 citing papers in PubMed, 63 citations in OpenAlex.

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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 3 institutions in 2 countries.

Wenyan MeiDepartment of Cell and Developmental Biology, University of Pennsylvania School of Medicine, 421 Curie Boulevard, Philadelphia, PA 19104, USA.
Karen W Lee
Florence L Marlow
Andrew L Miller
Mary C Mullins
Hong Kong University of Science and Technology · HKUniversity of Pennsylvania · USNationwide Children's Hospital · US

Funding

Genetic analysis of ovary development and oogenesisR01HD050901 · NICHD · UNIVERSITY OF PENNSYLVANIA · PI MULLINS, MARY C. · 2005 to 2009
$1.9M
NICHD NIH HHS R01HD050901
6 · The paper itself

Abstract

Egg activation is an important cellular event required to prevent polyspermy and initiate development of the zygote. Egg activation in all animals examined is elicited by a rise in free Ca(2+) in the egg cytosol at fertilization. This Ca(2+) rise is crucial for all subsequent egg activation steps, such as cortical granule exocytosis, which modifies the vitelline membrane to prevent polyspermy. The cytosolic Ca(2+) rise is primarily initiated by inositol 1,4,5-trisphosphate (IP(3))-mediated Ca(2+) release from the endoplasmic reticulum. The genes involved in regulating the IP(3)-mediated Ca(2+) release during egg activation remain largely unknown. Here we report on a zebrafish maternal-effect mutant, brom bones, which is defective in the cytosolic Ca(2+) rise and subsequent egg activation events, including cortical granule exocytosis and cytoplasmic segregation. We show that the egg activation defects in brom bones can be rescued by providing Ca(2+) or the Ca(2+)-release messenger IP(3), suggesting that brom bones is a regulator of IP(3)-mediated Ca(2+) release at fertilization. Interestingly, brom bones mutant embryos also display defects in dorsoventral axis formation accompanied by a disorganized cortical microtubule network, which is known to be crucial for dorsal axis formation. We provide evidence that the impaired microtubule organization is associated with non-exocytosed cortical granules from the earlier egg activation defect. Positional cloning of the brom bones gene reveals that a premature stop codon in the gene encoding hnRNP I (referred to here as hnrnp I) underlies the abnormalities. Our studies therefore reveal an important new role of hnrnp I in regulating the fundamental process of IP(3)-mediated Ca(2+) release at egg activation.

Indexed as

ZebrafishAmino Acid SequenceAnimalsCalciumCalcium SignalingEndoplasmic ReticulumFemaleHeterogeneous-Nuclear RibonucleoproteinsHumansInositol 1,4,5-TrisphosphateMicrotubulesMolecular Sequence DataOocytesPhenotypeSequence AlignmentZebrafish ProteinsCalciumHeterogeneous-Nuclear RibonucleoproteinsInositol 1,4,5-TrisphosphateZebrafish Proteins

Identifiers

PMID19666827
PMCPMC2723070
OpenAlexW1981692907

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.