Evidence map›Paper›PMID 27021570›Full record

ArticleMolecular and biochemical parasitology

Real-time PCR for sexing Schistosoma mansoni cercariae.

Frédéric D Chevalier, Winka Le Clec'h, Ana Carolina Alves de Mattos, Philip T LoVerde, Timothy J C Anderson

Abstract read
In one paragraph

Article in Molecular and biochemical parasitology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing 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

13 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

5 authors.

Frédéric D ChevalierDepartment of Genetics, Texas Biomedical Research Institute, San Antonio, TX 78245, USA. Electronic address: fcheval@txbiomed.org.
Winka Le Clec'hDepartment of Genetics, Texas Biomedical Research Institute, San Antonio, TX 78245, USA. Electronic address: winkal@txbiomed.org.
Ana Carolina Alves de MattosDepartments of Biochemistry and Pathology, University of Texas Health Science Center, San Antonio, TX 78229-3900, USA. Electronic address: anademattos@cpqrr.fiocruz.br.
Philip T LoVerdeDepartments of Biochemistry and Pathology, University of Texas Health Science Center, San Antonio, TX 78229-3900, USA. Electronic address: loverde@uthscsa.edu.
Timothy J C AndersonDepartment of Genetics, Texas Biomedical Research Institute, San Antonio, TX 78245, USA. Electronic address: tanderso@txbiomed.org.

Funding

Structure-guided redesign of an antischistosomal drugR01AI115691 · NIAID · UNIVERSITY OF TEXAS HLTH SCIENCE CENTER · PI LOVERDE, PHILIP T · 2015 to 2019
$2.6M
Genetic Analysis of Host Specificity in Schistosoma mansoniR01AI097576 · NIAID · TEXAS BIOMEDICAL RESEARCH INSTITUTE · PI ANDERSON, TIM J · 2012 to 2014
$1.7M
Modeling Drug Induced Resistance in S. mansoni Endemic AreasP50AI098507 · NIAID · FOUNDATION FOR RESEARCH DEVELOPMENT · PI CORREA-OLIVEIRA, RODRIGO · 2012 to 2016
$1.5M
MOLECULAR AND BIOCHEMICAL GENETICS LABORATORY RENOVATIONC06RR013556 · NCRR · SOUTHWEST FOUNDATION FOR BIOMEDICAL RES · PI SHADE, ROBERT E · 1998 to 1998
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NCRR NIH HHS C06 RR013556NIAID NIH HHS 1R01AI115691NIAID NIH HHS HHSN272201000005CNIAID NIH HHS HHSN272201000005INIAID NIH HHS P50 AI098507NIAID NIH HHS R01 AI097576NIAID NIH HHS R01-AI097576NIAID NIH HHS R01 AI115691
6 · The paper itself

Abstract

The gender of cercarial larvae can only be determined using molecular methods. End point PCR methods that amplify repetitive markers on the W chromosome of the female (ZW) parasites have been developed, but sometimes results are ambiguous or incorrect. To more effectively distinguish sexes, and to determine why end point PCR can be incorrect, we quantified the W6 repeat sequence and a specific Z chromosome gene using real-time PCR. The ratio between copy number of W6 and a Z chromosome marker unambiguously identifies gender: females have higher ratios (421-4371) than males (0-21). However, some males have low numbers of W6 elements in their genome, and qPCR demonstrated significantly higher W6/Z marker ratios for male genotypes giving ambiguous end point PCR results compared with males giving clear end point results. The quantitative PCR sexing method developed will be particularly useful where reliable sexing of cercariae is critical, for example when staging genetic crosses.

Indexed as

Sex Determination AnalysisAnimalsFemaleLarvaMaleReal-Time Polymerase Chain ReactionSchistosoma mansoniSex ChromosomesCercariaeqPCRSchistosomeSexing methods

Identifiers

PMID27021570
PMCPMC4841722

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Registered trials

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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.