Evidence map›Paper›PMID 26472030›Full record

ArticleOncotarget2015

Bortezomib-mediated down-regulation of telomerase and disruption of telomere homeostasis contributes to apoptosis of malignant cells.

Xinyu Ci, Bingnan Li, Xueping Ma, Feng Kong, Chengyun Zheng, Magnus Björkholm, Jihui Jia, Dawei Xu

Open access · diamondAbstract read
In one paragraph

Article in Oncotarget, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.6field-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

20 citing papers in PubMed, 28 citations in OpenAlex.

  1. Review
  2. TIMELESS as a prognostic biomarker and therapeutic target in gastric cancer.Journal, genetic engineering & biotechnology · 2025
    Article
  3. Review
  4. Review
  5. Article
  6. Article
  7. Review
  8. Review
  9. Article
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  11. Article
  12. Telomerase and drug resistance in cancer.Cellular and molecular life sciences : CMLS · 2017
    Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. 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

8 authors at 4 institutions in 2 countries.

Xinyu CiCentral Research Laboratory, Shandong University Second Hospital, Jinan, PR China.
Bingnan LiDivision of Hematology, Department of Medicine and Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital Solna, Stockholm, Sweden.
Xueping MaCentral Research Laboratory, Shandong University Second Hospital, Jinan, PR China.
Feng KongCentral Research Laboratory, Shandong University Second Hospital, Jinan, PR China.
Chengyun ZhengKarolinska Institutet-Shandong University Collaborative Laboratories for Cancer and Stem Cell Research, Jinan, PR China.
Magnus BjörkholmDivision of Hematology, Department of Medicine and Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital Solna, Stockholm, Sweden.
Jihui JiaDepartment of Microbiology, School of Medicine, Shandong University, Jinan, PR China.
Dawei XuDivision of Hematology, Department of Medicine and Center for Molecular Medicine, Karolinska Institutet and Karolinska University Hospital Solna, Stockholm, Sweden.
Karolinska University Hospital · SESecond Hospital of Shandong University · CNShandong University · CNKarolinska Institutet · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bortezomib inhibits the ubiquitin/proteasome pathway to achieve its anti-cancer effect and its well characterized activity is the NF-κB inhibition through which the anti-apoptotic bcl-2 expression is down-regulated and apoptosis is subsequently induced. However, the downstream molecular targets of bortezomib are still incompletely defined. Because telomere stabilization via activation of telomerase, induction of telomerase reverse transcriptase (hTERT) and appropriate expression of shelterin proteins is essential to cancer development and progression, we investigated the effect of bortezomib on telomere homeostasis/function in malignant cells. The bortezomib treatment of leukemic (HEL) and gastric cancer cells (BGC-823) led to significant inhibition of hTERT and telomerase expression, widespread dysregulation of shelterin protein expression, and telomere shortening, thereby triggering telomere dysfunction and DNA damage. hTERT over-expression attenuated bortezomib-induced telomere shortening, abnormal shelterin expression and telomere dysfunction. Importantly, bortezomib-mediated apoptosis of malignant cells was partially prevented by hTERT over-expression. Mechanistically, hTERT first robustly enhances bcl2 expression and maintains significantly high residual levels of bcl2 even in bortezomib-treated HEL cells. Second, hTERT protects against bortezomib-induced DNA damage. Our findings collectively reveal a profound impact of bortezomib on telomere homeostasis/function. Down-regulation of hTERT expression and telomere dysfunction induced by bortezomib both contribute to its cancer cell killing actions. It is evident from the present study that hTERT can confer resistance of malignant cells to bortezomib-based target cancer therapy, which may have important clinical implications.

Indexed as

Antineoplastic AgentsApoptosisBortezomibCell Line, TumorDNA DamageDose-Response Relationship, DrugDown-RegulationDrug Resistance, NeoplasmGene Expression Regulation, EnzymologicGene Expression Regulation, NeoplasticHumansLeukemiaProteasome InhibitorsProto-Oncogene Proteins c-bcl-2Shelterin ComplexStomach NeoplasmsAntineoplastic AgentsBCL2 protein, humanBortezomibProteasome InhibitorsProto-Oncogene Proteins c-bcl-2Shelterin ComplexTelomeraseTelomere-Binding ProteinsTERT protein, humanapoptosisBCL2bortezomibhTERTtelomerase

Identifiers

PMID26472030
PMCPMC4741985
OpenAlexW2253288561

What OpenQuestion holds

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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.