Evidence map›Paper›PMID 8440261›Full record

ArticleThe EMBO journal1993

Divergent evolution of T cell repertoires: extensive diversity and developmentally regulated expression of the sheep gamma delta T cell receptor.

W R Hein, L Dudler

Open access · greenAbstract read
In one paragraph

Article in The EMBO journal, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed
2.5field-weighted citation impact, top 10% 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

30 citing papers in PubMed, 83 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

2 authors at 1 institution in 1 country.

W R HeinBasel Institute for Immunology, Switzerland.
L Dudler
Institute of Molecular and Clinical Ophthalmology Basel · CH

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Sheep gamma delta T cells express an unprecedented repertoire of antigen receptors contributed by increased diversity in both variable and constant region gene segments. Variable region diversity results mainly from the utilization of a large family of duplicated V delta genes that have retained two distinct hypervariable segments comparable with the complementarity determining regions present in other antigen receptor V genes. This implies that sheep V delta chains have been intensely selected during evolution, probably at sites involved in ligand recognition. The sheep gamma delta heterodimer occurs in at least five isotypic variants formed by the association of a single C delta segment with one of five functional C gamma segments, each with distinctive hinge regions. Our analysis also shows that the establishment of a normal peripheral repertoire is both developmentally regulated and dependent on the continual presence of a functional thymus during ontogeny. The existence of an expanded V gene repertoire and multiple receptor isotypes together with the prominence of gamma delta T cells in the sheep immune system argues that this lineage of T cells has a more elaborate functional role in this evolutionary pathway.

Indexed as

Biological EvolutionGene Expression RegulationAmino Acid SequenceAnimalsBase SequenceCells, CulturedDNAFetusMolecular Sequence DataMultigene FamilyReceptors, Antigen, T-Cell, gamma-deltaSequence Homology, Amino AcidSequence Homology, Nucleic AcidSheepThymus GlandT-LymphocytesDNAReceptors, Antigen, T-Cell, gamma-delta

Identifiers

PMID8440261
PMCPMC413257
OpenAlexW122456566

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.