Evidence map›Paper›PMID 20631743›Full record

ArticleLeukemia2010

A prospective study of 338 patients with polycythemia vera: the impact of JAK2 (V617F) allele burden and leukocytosis on fibrotic or leukemic disease transformation and vascular complications.

F Passamonti, E Rumi, D Pietra, C Elena, E Boveri, L Arcaini, E Roncoroni, C Astori, M Merli, S Boggi and 3 more

Open access · greenAbstract read
PubMed Publisher
In one paragraph

Article in Leukemia, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 175 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
175citing papers in PubMed, 4 pooled it
12.0field-weighted citation impact, top 1% 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

175 citing papers in PubMed, 4 syntheses or guidelines pooled it, 356 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Guideline
  4. Philadelphia-negative classical myeloproliferative neoplasms: critical concepts and management recommendations from European LeukemiaNet.Journal of clinical oncology : official journal of the American Society of Clinical Oncology · 2011
    Guideline
  5. Trial
  6. Ruxolitinib Versus Best Available Therapy for Polycythemia Vera Intolerant or Resistant to Hydroxycarbamide in a Randomized Trial.Journal of clinical oncology : official journal of the American Society of Clinical Oncology · 2023
    Trial
  7. Trial
  8. Trial
  9. Trial
  10. Trial
  11. Trial
  12. Review
  13. Article
  14. Homozygosity of germ lineBlood neoplasia · 2026
    Article
  15. Article
  16. [Progress in the study of polycythemia vera in children].Zhongguo dang dai er ke za zhi = Chinese journal of contemporary pediatrics · 2026
    Review
  17. Review
  18. Review
  19. Article
  20. Review

115 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

13 authors at 3 institutions in 1 country.

F PassamontiDivision of Hematology, Department of Hematology Oncology, Fondazione IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy. francesco.passamonti@unipv.it
E Rumi
D Pietra
C Elena
E Boveri
L Arcaini
E Roncoroni
C Astori
M Merli
S Boggi
C Pascutto
M Lazzarino
M Cazzola
University of Pavia · ITIstituti di Ricovero e Cura a Carattere Scientifico · ITPoliclinico San Matteo Fondazione · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

We studied the relationship between JAK2 (V617F) mutant allele burden and clinical phenotype, disease progression and survival in patients with polycythemia vera (PV). The percentage of granulocyte mutant alleles was evaluated using a quantitative real-time polymerase chain reaction-based allelic discrimination assay. Of the 338 patients enrolled in this prospective study, 320 (94.7%) carried the JAK2 (V617F) mutation. Direct relationships were found between mutant allele burden and hemoglobin concentration (P=0.001), white blood cell count (P=0.001), spleen size (P=0.001) and age-adjusted bone marrow cellularity (P=0.002), while an inverse relationship was found with platelet count (P<0.001). During the study period, eight patients progressed to post-PV myelofibrosis (MF) (all carrying >50% mutant alleles), while 10 patients developed acute myeloid leukemia (AML). The mutant allele burden was significantly related to the risk of developing myelofibrosis (P=0.029) and retained its significant effect also in multivariable analysis (P=0.03). By contrast, the risk of developing AML as well as that of thrombosis was not significantly related to mutant allele burden. Leukocytosis did not affect thrombosis, MF, leukemia or survival. In conclusion, a JAK2 (V617F) allele burden >50% represents a risk factor for progression to MF in PV.

Indexed as

AllelesAgedCell Transformation, NeoplasticFemaleHumansJanus Kinase 2LeukemiaLeukocytosisMaleMiddle AgedMultivariate AnalysisMutationPolycythemia VeraPolymerase Chain ReactionPrimary MyelofibrosisProspective StudiesJAK2 protein, humanJanus Kinase 2

Identifiers

PMID20631743
OpenAlexW2012686883

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.