Evidence map›Paper›PMID 2170681›Full record

ArticleJournal of virology1990

Up regulation of the Epstein-Barr virus (EBV)-encoded membrane protein LMP in the Burkitt's lymphoma line Daudi after exposure to n-butyrate and after EBV superinfection.

B Contreras-Salazar, B Ehlin-Henriksson, G Klein, M G Masucci

Abstract read
In one paragraph

Article in Journal of virology, 1990. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing 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

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3 · Its place in the literature

Who cites it

14 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

4 authors.

B Contreras-SalazarDepartment of Tumor Biology, Karolinska Institute, Stockholm, Sweden.
B Ehlin-Henriksson
G Klein
M G Masucci

Funding

IMMUNE EFFECTOR MECHANISMS IN EBV CARRYING PATIENTSR01CA030264 · NCI · KAROLINSKA INSTITUTE · PI KLEIN, GEORGE · 1985 to 1993
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NCI NIH HHS 2R01 CA 30264
6 · The paper itself

Abstract

The Burkitt's lymphoma line Daudi carries a nontransforming Epstein-Barr virus (EBV) strain that has a deletion in the BamHI WYH region of the genome coding for the EBV nuclear antigen 2 (EBNA-2). Daudi cells fail to express the EBV-encoded latent membrane protein (LMP) (D. Ghosh and E. Kieff, J. Virol. 64:1855-1858, 1990). We show that LMP expression can be up regulated by exposure to n-butyrate and by superinfection with the B95-8 (B virus)- and P3HR1 (P virus)-derived EBV strains. Two LMP polypeptides of 60 and 48 kilodaltons (kDa) were detected in immunoblots of Daudi cells that had been exposed to 3 mM n-butyrate for 24 h. The intensity of the 48-kDa LMP increased during 72 h, in parallel with the appearance of early antigen-positive cells. The 60-kDa LMP was expressed at a low level and remained constant. Superinfection of Daudi cells with B and P virus induced the 60-kDa LMP within 3 h. In addition, P virus induced the 48-kDa LMP at a low level. The B virus-encoded EBNA-2 and EBNA-5 were detected 12 h after superinfection. The B virus-encoded 63-kDa LMP was coexpressed with the endogenous LMP after 48 h. Inactivation of the virus by UV illumination abolished the expression of the B virus-encoded antigens but did not affect the induction of the endogenous LMP. The B-cell activation marker CD23 was up regulated by B virus superinfection but not by n-butyrate exposure. CD23 was also expressed at a higher level in a stable B virus-converted subline, E95A-Daudi, that was EBNA-2 positive and coexpressed the Daudi virus- and B virus-encoded LMP. The results suggest that LMP expression is regulated by the interaction of cellular and viral factors. Binding of the virus to its membrane receptor might be involved in the triggering of cellular control mechanisms. Viral gene products are not directly involved in this function but may contribute to create a permissive cellular environment for LMP expression.

Indexed as

Viral Matrix ProteinsAntigens, CDAntigens, Differentiation, B-LymphocyteAntigens, ViralB-LymphocytesBurkitt LymphomaButyratesEpstein-Barr Virus Nuclear AntigensGene Expression Regulation, ViralHerpesviridae InfectionsHerpesvirus 4, HumanHumansLymphocyte ActivationMembrane ProteinsReceptors, FcReceptors, IgEAntigens, CDAntigens, Differentiation, B-LymphocyteAntigens, ViralButyratesEBV-associated membrane antigen, Epstein-Barr virusEpstein-Barr Virus Nuclear AntigensMembrane ProteinsReceptors, FcReceptors, IgEViral Matrix Proteins

Identifiers

PMID2170681
PMCPMC248595

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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.