Evidence map›Paper›PMID 22203953›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2012

Sperm-borne microRNA-34c is required for the first cleavage division in mouse.

Wei-Min Liu, Ronald T K Pang, Philip C N Chiu, Benancy P C Wong, Kaiqin Lao, Kai-Fai Lee, William S B Yeung

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 202 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
202citing papers in PubMed, 1 pooled it
26.4field-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

202 citing papers in PubMed, 1 synthesis or guideline pooled it, 459 citations in OpenAlex.

  1. Pooled it
  2. Trial
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  4. Review
  5. Review
  6. Article
  7. Article
  8. Article
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  12. Article
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  14. Article
  15. Sperm abnormality: Differential expression of microRNAs.Journal of assisted reproduction and genetics · 2025
    Review
  16. Article
  17. Article
  18. Article
  19. The composition of human sperm sncRNAome: a cross-country small RNA profiling.Reproductive biology and endocrinology : RB&E · 2025
    Article
  20. Review

142 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

7 authors at 1 institution in 1 country.

Wei-Min LiuDepartment of Obstetrics and Gynaecology and Centre for Reproduction, Development and Growth, University of Hong Kong, Pokfulam, Hong Kong, People's Republic of China.
Ronald T K Pang
Philip C N Chiu
Benancy P C Wong
Kaiqin Lao
Kai-Fai Lee
William S B Yeung
University of Hong Kong · HK

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In mammals, the sperm deliver mRNA of unknown function into the oocytes during fertilization. The role of sperm microRNAs (miRNAs) in preimplantation development is unknown. miRNA profiling identified six miRNAs expressed in the sperm and the zygotes but not in the oocytes or preimplantation embryos. Sperm contained both the precursor and the mature form of one of these miRNAs, miR-34c. The absence of an increased level of miR-34c in zygotes derived from α-amanitin-treated oocytes and in parthenogenetic oocytes supported a sperm origin of zygotic miR-34c. Injection of miR-34c inhibitor into zygotes inhibited DNA synthesis and significantly suppressed first cleavage division. A 3' UTR luciferase assay and Western blotting demonstrated that miR-34c regulates B-cell leukemia/lymphoma 2 (Bcl-2) expression in the zygotes. Coinjection of anti-Bcl-2 antibody in zygotes partially reversed but injection of Bcl-2 protein mimicked the effect of miR-34c inhibition. Oocyte activation is essential for the miR-34c action in zygotes, as demonstrated by a decrease in 3'UTR luciferase reporter activity and Bcl-2 expression after injection of precursor miR-34c into parthenogenetic oocytes. Our findings provide evidence that sperm-borne miR-34c is important for the first cell division via modulation of Bcl-2 expression.

Indexed as

Alpha-AmanitinAnimalsBlotting, WesternCleavage Stage, OvumDNA ReplicationGene Expression Regulation, DevelopmentalLuciferasesMaleMiceMicroRNAsProto-Oncogene Proteins c-bcl-2SpermatozoaAlpha-AmanitinLuciferasesMicroRNAsMIRN34a microRNA, mouseProto-Oncogene Proteins c-bcl-2

Identifiers

PMID22203953
PMCPMC3258645
OpenAlexW2057359773

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.