Evidence map›Paper›PMID 19894108›Full record

ArticleJournal of assisted reproduction and genetics

Cytogenetic analysis of human embryos and embryonic stem cells derived from monopronuclear zygotes.

Hongqing Liao, Shuoping Zhang, Dehua Cheng, Qi Ouyang, Ge Lin, Yifan Gu, Changfu Lu, Fei Gong, Guangxiu Lu

Abstract read
In one paragraph

Article in Journal of assisted reproduction and genetics. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

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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

11 citing papers in PubMed.

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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

9 authors.

Hongqing LiaoInstitute of Reproductive and Stem Cell Engineering, Central South University, Changsha, Hunan, China.
Shuoping Zhang
Dehua Cheng
Qi Ouyang
Ge Lin
Yifan Gu
Changfu Lu
Fei Gong
Guangxiu Lu

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeBy comparing the chromosomal constitution among the arrested cleavage-stage embryos, blastocysts and human embryonic stem cells (hESCs) which are all derived from monopronuclear (1PN) zygotes, it is aimed to determine whether chromosomally normal embryos can be reliably selected by blastocyst culture.

methodsAfter 1PN zygotes are sequentially cultured for 5 days, the blastocysts and arrested cleavage-stage embryos were analyzed by fluorescence in situ hybridization (FISH) with probes for chromosomes 18, X and Y; G-banding analysis was adopted to analyze the karyotype of 1PN hESCs.

resultsThe diploid rate of blastocysts was 74.6%, which was significantly (P < 0.001) higher than that of arrested cleavage-stage embryos (31.6%), and the diploid rate of hESCs was 97.0%, which was significantly (P < 0.01) higher than that of blastocysts; the haploid embryos were excluded by blastocyst culture; nevertheless, there still existed such chromosomal abnormalities as mosaic and monosomic in blastocysts and trisomy in hESCs.

conclusionsBlastocyst culture is an effective method to select against chromosomal abnormalities, especially the haploids in 1PN embryos; however, development to the blastocyst stage is not a reliable marker for mosaicism or aneuploidy.

Indexed as

Chromosomes, HumanBlastocystChi-Square DistributionChromosome AberrationsCytogenetic AnalysisEmbryonic Stem CellsFemaleHumansIn Situ Hybridization, FluorescenceMalePloidiesPregnancyPreimplantation Diagnosis

Identifiers

PMID19894108
PMCPMC2799555

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