Evidence map›Paper›PMID 21545744›Full record

ArticleBMC biochemistry2011

Effect of reverse transcriptase inhibitors on LINE-1 and Ty1 reverse transcriptase activities and on LINE-1 retrotransposition.

Lixin Dai, Qing Huang, Jef D Boeke

Open access · hybridAbstract read
In one paragraph

Article in BMC biochemistry, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 89 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
89citing papers in PubMed, 1 pooled it
7.8field-weighted citation impact, top 3% 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

89 citing papers in PubMed, 1 synthesis or guideline pooled it, 129 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Review
  4. Tenofovir, Interferon Pathways, and Mucosal Immunity: Implications for People Living With HIV.American journal of reproductive immunology (New York, N.Y. : 1989) · 2026
    Review
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. LINE-1 retrotransposon activation drives age-associated inflammationContemporary oncology (Poznan, Poland) · 2025
    Review
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. DNA damage and repair in age-related inflammation.Nature reviews. Immunology · 2023
    Review
  19. Review
  20. Inflammatory response to retrotransposons drives tumor drug resistance that can be prevented by reverse transcriptase inhibitors.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article

29 more citing papers are in PubMed but not listed here.

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

3 authors at 1 institution in 1 country.

Lixin DaiDepartment of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Qing Huang
Jef D Boeke
Johns Hopkins Medicine · US

Funding

TRANSPOSITION OF TN7P01CA016519 · NCI · JOHNS HOPKINS UNIVERSITY · PI BOEKE, JEF D · 1985 to 2010
$21.4M
TRANSPOSITION MECHANISMSR01GM036481 · NIGMS · JOHNS HOPKINS UNIVERSITY · PI BOEKE, JEF D · 1986 to 2011
$5.6M
NCI NIH HHS P01-CA16519NIGMS NIH HHS R01 GM036481NIGMS NIH HHS R01-GM36481
6 · The paper itself

Abstract

backgroundLINE-1s (L1, Long Interspersed Element-1) are the most abundant autonomous non-LTR retrotransposons in the human genome and replicate by reverse transcription of an RNA intermediate. Full-length L1 encodes two open reading frames (ORF1, ORF2) and ORF2 has reverse transcriptase activity.

resultsHere we expressed human L1 RT in E. coli and the purified protein displayed the same RT activity as that of ORF2p expressed in insect cells. We tested the effect of different reverse transcriptase inhibitors on L1 RT and found that all four tested nucleoside inhibitors efficiently inhibited L1 RT activity competitively. The Ki values of NRTIs were calculated (AZTTP, 16.4 ± 4.21 nM; d4TTP, 0.73 ± 0.22 nM; ddCTP, 0.72 ± 0.16 nM; 3TCTP, 12.9 ± 2.07 nM). L1 RT was less sensitive to non-nucleoside reverse transcriptase inhibitors, among these nevirapine had no effect, even at concentrations up to 500 μM. We also examined the effect of RT inhibitors on L1 retrotransposition efficiency in vivo using a cell-based retrotransposition assay. Similarly, all analog inhibitors decreased L1 retrotransposition frequency with different potencies whereas nevirapine had little or no effect on L1 retrotransposition. For comparison, we also tested the same inhibitors to highly purified RT of an LTR-retrotransposon (Ty1) and found it was less sensitive to NRTIs than L1 RT and has the same inhibition profile as L1 RT to NNRTIs.

conclusionsThese data indicate that bacterially expressed L1 RT is an active reverse transcriptase sensitive to nucleoside RT inhibitors but not to non-nucleoside inhibitors.

Indexed as

Amino Acid SequenceCell-Free SystemEnzyme AssaysEscherichia coliHeLa CellsHIV-1HIV-2HumansKineticsLong Interspersed Nucleotide ElementsMolecular Sequence DataReverse Transcriptase InhibitorsRNA-Directed DNA PolymeraseReverse Transcriptase InhibitorsRNA-Directed DNA Polymerase

Identifiers

PMID21545744
PMCPMC3103432
OpenAlexW1982644994

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.