Evidence map›Paper›PMID 8098045›Full record

ArticleThe Journal of clinical investigation1993

Characterization and distribution of alpha 2-adrenergic receptors in the human intestinal mucosa.

P Valet, J M Senard, J C Devedjian, V Planat, R Salomon, T Voisin, G Drean, A Couvineau, D Daviaud, C Denis

Open access · bronzeAbstract read
In one paragraph

Article in The Journal of clinical investigation, 1993. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
0.6field-weighted citation impact, top 40% 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

24 citing papers in PubMed, 59 citations in OpenAlex.

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  17. Principles and clinical implications of the brain-gut-enteric microbiota axis.Nature reviews. Gastroenterology & hepatology · 2009
    Review
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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

10 authors at 2 institutions in 1 country.

P ValetInstitut National de la Santé et de la Recherche Médicale, (INSERM) U317, Institut Louis Bugnard, Centre Hospitalier Universitaire Rangueil, Toulouse, France.
J M Senard
J C Devedjian
V Planat
R Salomon
T Voisin
G Drean
A Couvineau
D Daviaud
C Denis
Inserm · FRDélégation Paris 6 · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The subtype and the expression of the alpha 2-adrenergic receptor were investigated in the normal mucosa from human intestine by means of radioligand binding, RNase mapping, and measurement of adenylate cyclase activity. The study of the binding of the alpha 2-adrenergic antagonist, [3H]RX821002, to epithelial cell membranes indicated the existence of a single class of noninteracting sites displaying a high affinity for the radioligand (Kd = 1.1 +/- 0.5 nM). The rank order of potency of antagonists to inhibit [3H]RX821002 binding (RX821002 > yohimbine = rauwolscine > phentolamine approximately idazoxan >> chlorpromazine > prazosin) suggested that the receptor is of the alpha 2A subtype. A conclusion which is confirmed by the fact that only alpha 2C10 transcripts were found in the human intestine mucosa. Competition curves with (-)-norepinephrine demonstrated that 60% of the receptor population exhibited high affinity for agonists. This high-affinity state was abolished by the addition of GTP plus Na+ or by prior treatment of the membranes with pertussis toxin indicating it corresponded to G protein-coupled receptors. [32P]ADP-ribosylation and immunoblotting experiments identified two pertussis toxin-sensitive G proteins corresponding to Gi2 and Gi3. The study of the distribution of the receptor indicated that (a) the proximal colon is the intestine segment exhibiting the highest receptor density and (b) the receptor is predominantly expressed in crypts and is preferentially located in the basolateral membrane of the polarized cell. The distribution of the receptor along the crypt-surface axis of the colon mucosa can be correlated with a higher level of alpha 2C10-specific mRNA and a higher efficiency of UK14304 to inhibit adenylate cyclase in crypt cells.

Indexed as

Adenosine Diphosphate RiboseAdenylate Cyclase ToxinAdenylyl Cyclase InhibitorsAdrenergic alpha-AgonistsAdrenergic alpha-AntagonistsBinding, CompetitiveBrimonidine TartrateCell MembraneColonDioxanesDuodenumEpinephrineEpitheliumHumansIdazoxanIntestinal Mucosa2-methoxyidazoxanAdenosine Diphosphate RiboseAdenylate Cyclase ToxinAdenylyl Cyclase InhibitorsAdrenergic alpha-AgonistsAdrenergic alpha-AntagonistsBrimonidine TartrateDioxanesEpinephrineIdazoxanNADPertussis ToxinQuinoxalinesReceptors, Adrenergic, alphaRNA, MessengerVirulence Factors, Bordetella

Identifiers

PMID8098045
PMCPMC288203
OpenAlexW2070409051

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.