Evidence map›Paper›PMID 19712539›Full record

ArticleParasitology2010

daf-7-related TGF-beta homologues from Trichostrongyloid nematodes show contrasting life-cycle expression patterns.

H J McSorley, J R Grainger, Y Harcus, J Murray, A J Nisbet, D P Knox, R M Maizels

Open access · greenAbstract read
In one paragraph

Article in Parasitology, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 40 papers.

0numbers the graph read from it
0cells of the map it votes in
40citing papers in PubMed
5.7field-weighted citation impact, top 4% 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

40 citing papers in PubMed, 61 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

7 authors at 3 institutions in 1 country.

H J McSorleyCentre for Immunity, Infection and Evolution, and Institute for Immunology and Infection Research, Ashworth Laboratories, University of Edinburgh, West Mains Road, Edinburgh EH9 3JT, Scotland.
J R Grainger
Y Harcus
J Murray
A J Nisbet
D P Knox
R M Maizels
Centre for Immunity, Infection and Evolution · GBMoredun Research Institute · GBUniversity of Edinburgh · GB

Funding

Medical Research CouncilWellcome Trust 090281
6 · The paper itself

Abstract

The transforming growth factor-beta (TGF-beta) gene family regulates critical processes in animal development, and plays a crucial role in regulating the mammalian immune response. We aimed to identify TGF-beta homologues from 2 laboratory model nematodes (Heligmosomoides polygyrus and Nippostrongylus brasiliensis) and 2 major parasites of ruminant livestock (Haemonchus contortus and Teladorsagia circumcincta). Parasite cDNA was used as a template for gene-specific PCR and RACE. Homologues of the TGH-2 subfamily were isolated, and found to differ in length (301, 152, 349 and 305 amino acids respectively), with variably truncated N-terminal pre-proteins. All contained conserved C-terminal active domains (>85% identical over 115 amino acids) containing 9 cysteine residues, as in C. elegans DAF-7, Brugia malayi TGH-2 and mammalian TGF-beta. Surprisingly, only the H. contortus homologue retained a conventional signal sequence, absent from shorter proteins of other species. RT-PCR assays of transcription showed that in H. contortus and N. brasiliensis expression was maximal in the infective larval stage, and very low in adult worms. In contrast, in H. polygyrus and T. circumcincta, tgh-2 transcription is higher in adults than infective larvae. The molecular evolution of this gene family in parasitic nematodes has diversified the pre-protein and life-cycle expression patterns of TGF-beta homologues while conserving the structure of the active domain.

Indexed as

Caenorhabditis elegans ProteinsGene Expression Regulation, DevelopmentalLife Cycle StagesSequence Homology, Amino AcidTransforming Growth Factor betaAmino Acid SequenceAnimalsGene Expression ProfilingHelminth ProteinsHumansMiceMice, Inbred C57BLMolecular Sequence DataNematospiroides dubiusPhylogenySequence AlignmentCaenorhabditis elegans ProteinsDAF-7 protein, C elegansHelminth ProteinsTransforming Growth Factor beta

Identifiers

PMID19712539
PMCPMC4794624
OpenAlexW2138512081

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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.