Evidence map›Paper›PMID 28464843›Full record

ArticleBMC cancer2017

Immunohistochemical evaluation of epithelial ovarian carcinomas identifies three different expression patterns of the MX35 antigen, NaPi2b.

Kristina Levan, Matin Mehryar, Constantina Mateoiu, Per Albertsson, Tom Bäck, Karin Sundfeldt

Open access · goldAbstract read
In one paragraph

Article in BMC cancer, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
1.9field-weighted citation impact, top 15% 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

26 citing papers in PubMed, 45 citations in OpenAlex.

  1. Review
  2. Structures of the sodium-coupled phosphate importer SLC34A2 reveal a distinct architecture and gating mechanism.Proceedings of the National Academy of Sciences of the United States of America · 2026
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  3. Antibody-Drug Conjugates in Gynecologic Oncology: Advances, Challenges, and Future Directions.BioDrugs : clinical immunotherapeutics, biopharmaceuticals and gene therapy · 2026
    Review
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  7. Review
  8. Transport and InsPNature communications · 2025
    Article
  9. Review
  10. Review
  11. Article
  12. Review
  13. Antibody-Drug Conjugates in Gynecologic Cancers.Current treatment options in oncology · 2024
    Review
  14. Review
  15. Association between CKD-MBD and mortality in older patients with advanced CKD-results from the EQUAL study.Nephrology, dialysis, transplantation : official publication of the European Dialysis and Transplant Association - European Renal Association · 2023
    Article
  16. Article
  17. Review
  18. Antibody-drug conjugates come of age in oncology.Nature reviews. Drug discovery · 2023
    Review
  19. Review
  20. Article
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

6 authors at 2 institutions in 1 country.

Kristina LevanSahlgrenska Cancer Center, Department of Obstetrics and Gynecology, Institute of Clinical Sciences, University of Gothenburg, SE-405 30, Gothenburg, Sweden. kristina.levan@gu.se.ORCID 0000-0002-8872-1931
Matin MehryarSahlgrenska Cancer Center, Department of Obstetrics and Gynecology, Institute of Clinical Sciences, University of Gothenburg, SE-405 30, Gothenburg, Sweden.
Constantina MateoiuDepartment of Pathology and Cytology, Institute of Biomedicine, University of Gothenburg, SE-405 30, Gothenburg, Sweden.
Per AlbertssonDepartment of Oncology, Institute of Clinical Sciences, University of Gothenburg, SE-405 30, Gothenburg, Sweden.
Tom BäckDepartment of Radiation Physics, Institute of Clinical Sciences, University of Gothenburg, SE-405 30, Gothenburg, Sweden.
Karin SundfeldtSahlgrenska Cancer Center, Department of Obstetrics and Gynecology, Institute of Clinical Sciences, University of Gothenburg, SE-405 30, Gothenburg, Sweden.
University of Gothenburg · SESahlgrenska University Hospital · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundTo characterize the expression of the membrane transporter NaPi2b and antigen targeted by the MX35 antibody in ovarian tumor samples. The current interest to develop monoclonal antibody based therapy of ovarian cancer by targeting NaPi2b emphasizes the need for detailed knowledge and characterization of the expression pattern of this protein. For the majority of patients with ovarian carcinoma the risk of being diagnosed in late stages with extensive loco-regional spread disease is substantial, which stresses the need to develop improved therapeutic agents.

methodsThe gene and protein expression of SLC34A2/NaPi2b were analyzed in ovarian carcinoma tissues by QPCR (n = 73) and immunohistochemistry (n = 136). The expression levels and antigen localization were established and compared to the tumor characteristics and clinical data.

resultsPositive staining for the target protein, NaPi2b was detected for 93% of the malignant samples, and we identified three separate distribution patterns of the antigen within the tumors, based on the localization of NaPi2b. There were differences in the staining intensity as well as the distribution pattern when comparing the tumor grade and histology, the mucinous tumors presented a significantly lower expression of both the targeted protein and its related gene.

conclusionOur study identified differences regarding the level of the antigen expression between tumor grade and histology. We have identified differences in the antigen localization between borderline tumors, type 1 and type 2 tumors, and suggest that a pathological evaluation of NaPi2b in the tumors would be helpful in order to know which patients that would benefit from this targeted therapy.

Indexed as

Antibodies, MonoclonalAntibodies, Monoclonal, Murine-DerivedCarcinoma, Ovarian EpithelialFemaleHumansImmunohistochemistryNeoplasms, Glandular and EpithelialOvarian NeoplasmsOvarySodium-Phosphate Cotransporter Proteins, Type IIbAntibodies, MonoclonalAntibodies, Monoclonal, Murine-DerivedMX 35 monoclonal antibodySLC34A2 protein, humanSodium-Phosphate Cotransporter Proteins, Type IIbMonoclonal antibodyNaPi2b expressionOvarian cancerRadiotherapy

Identifiers

PMID28464843
PMCPMC5414119
OpenAlexW2610706396

What OpenQuestion holds

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Registered trials

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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.