Evidence map›Paper›PMID 20133630›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2010

Disruption of the Lcn2 gene in mice suppresses primary mammary tumor formation but does not decrease lung metastasis.

Thorsten Berger, Carol C Cheung, Andrew J Elia, Tak W Mak

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 51 papers.

0numbers the graph read from it
0cells of the map it votes in
51citing papers in PubMed
5.3field-weighted citation impact, top 4% 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

51 citing papers in PubMed, 97 citations in OpenAlex.

  1. Article
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  8. Iron metabolism, ferroptosis, and lncRNA in cancer: knowns and unknowns.Journal of Zhejiang University. Science. B · 2022
    Review
  9. Article
  10. Article
  11. Comprehensive review of lipocalin 2-mediated effects in lung inflammation.American journal of physiology. Lung cellular and molecular physiology · 2021
    Review
  12. Article
  13. Article
  14. Iron and Cancer: 2020 Vision.Cancer research · 2020
    Review
  15. Article
  16. Review
  17. Article
  18. Article
  19. Article
  20. Iron as a Central Player and Promising Target in Cancer Progression.International journal of molecular sciences · 2019
    Review
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 at 2 institutions in 1 country.

Thorsten BergerThe Campbell Family Institute for Breast Cancer Research, University Health Network, Toronto, ON M5G 2C1, Canada.
Carol C Cheung
Andrew J Elia
Tak W Mak
Ontario Institute for Cancer Research · CAUniversity Health Network · CA

Funding

Canadian Institutes of Health Research
6 · The paper itself

Abstract

Based largely on studies in xenograft models, lipocalin-2 (Lcn2) has been implicated in the progression of multiple types of human tumors, including breast cancer. Here we examine the role of Lcn2 in mammary tumorigenesis and lung metastasis using an in vivo molecular genetics approach. We crossed a well-characterized transgenic mouse model of breast cancer, the MMTV-PyMT (mouse mammary tumor virus-polyoma middle T antigen) mouse, with two independent gene-targeted Lcn2(-/-) mouse strains of the 129/Ola or C57BL/6 genetic background. The onset and progression of mammary tumor development and lung metastasis in the female progeny of these crosses were monitored over a 20-week period. Female Lcn2(-/-)MMTV-PyMT mice of the 129/Ola background (Lcn2(-/-)PyMT(129)) showed delayed onset of mammary tumors, and both Lcn2(-/-)PyMT(129) mice and Lcn2(-/-)MMTV-PyMT mice of the C57BL/6 background (Lcn2(-/-)PyMT(B6)) exhibited significant decreases in multiplicity and tumor burden (approximately 2- to 3-fold), as measured by total tumor weight and volume. At the molecular level, mammary tumors derived from Lcn2(-/-)PyMT(B6) females showed reduced matrix metalloproteinase-9 (MMP-9) activity and a lack of high molecular weight MMP activity. However, although increased MMP-9 activity has been linked to tumor progression, neither Lcn2(-/-)PyMT(B6) nor Lcn2(-/-)PyMT(129) female mice showed a reduction in lung metastases compared to Lcn2(+/+)PyMT controls. Our results demonstrate, using an in vivo animal model approach, that Lcn2 is a potent inducer of mammary tumor growth but not a significant promoter of lung metastasis.

Indexed as

Acute-Phase ProteinsAnimalsBlotting, WesternCrosses, GeneticElectrophoresis, Polyacrylamide GelFemaleHistological TechniquesLipocalin-2LipocalinsLung NeoplasmsMammary Neoplasms, AnimalMatrix Metalloproteinase 9MiceMice, TransgenicNeoplasm MetastasisOncogene ProteinsAcute-Phase ProteinsLcn2 protein, mouseLipocalin-2LipocalinsMatrix Metalloproteinase 9Oncogene Proteins

Identifiers

PMID20133630
PMCPMC2840296
OpenAlexW2108346377

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.