Evidence map›Paper›PMID 33686456›Full record

ArticleEuropean journal of nuclear medicine and molecular imaging2021

Early alkaline phosphatase dynamics as biomarker of survival in metastatic castration-resistant prostate cancer patients treated with radium-223.

Maarten J van der Doelen, Agnes Stockhaus, Yuanjun Ma, Niven Mehra, Jeffrey Yachnin, Winald R Gerritsen, Sten Nilsson, Inge M van Oort, Anders Ullén

Open access · hybridAbstract readMulticenter Study
In one paragraph

Article in European journal of nuclear medicine and molecular imaging, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 2 pooled it
2.8field-weighted citation impact, top 9% 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

16 citing papers in PubMed, 2 syntheses or guidelines pooled it, 27 citations in OpenAlex.

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  5. Biomarkers of bone metabolism in [EJNMMI research · 2024
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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

9 authors at 4 institutions in 3 countries.

Maarten J van der DoelenDepartment of Urology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, The Netherlands. Maarten.vanderDoelen@radboudumc.nl.ORCID 0000-0001-8754-1210
Agnes StockhausDepartment of Oncology-Pathology, Mälarsjukhuset, Eskilstuna, Sweden.
Yuanjun MaDepartment of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden.
Niven MehraDepartment of Medical Oncology, Radboud University Medical Center, Nijmegen, The Netherlands.
Jeffrey YachninDepartment of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden.
Winald R GerritsenDepartment of Medical Oncology, Radboud University Medical Center, Nijmegen, The Netherlands.
Sten NilssonDepartment of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden.
Inge M van OortDepartment of Urology, Radboud University Medical Center, Geert Grooteplein Zuid 10, 6525, GA, Nijmegen, The Netherlands.
Anders UllénDepartment of Oncology-Pathology, Karolinska Institutet, Stockholm, Sweden.
Radboud University Nijmegen · NLKarolinska University Hospital · SEKarolinska Institutet · SEUppsala University Hospital · SE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeRadium-223 is a life-prolonging therapy for castration-resistant prostate cancer (CRPC) patients with symptomatic bone metastases. However, validated biomarkers for response monitoring are lacking. The study aim was to investigate whether early alkaline phosphatase (ALP) dynamics after the first radium-223 injection can act as surrogate marker for overall survival (OS).

methodsThis retrospective multicenter study included consecutive CRPC patients treated with radium-223. Patients were divided into four subgroups based on baseline ALP level (normal/elevated) and early ALP response, defined as ≥10% ALP decrease after the first radium-223 injection. Primary endpoint was OS among the subgroups. Secondary endpoints included time to first skeletal-related event, time to ALP progression, and treatment completion rate.

resultsA total of 180 patients were included for analysis. Median OS was 13.5 months (95% confidence interval 11.5-15.5). Patients with elevated baseline ALP without ALP response after the first injection had significantly worse OS when compared to all other patients (median OS 7.9 months versus 15.7 months, hazard ratio 2.56, 95% confidence interval 1.73-3.80, P < 0.001). Multivariate analysis demonstrated that elevated baseline ALP without ALP response after the first injection, the number of prior systemic therapies, baseline LDH level, and baseline ECOG performance status were prognostic factors of OS. Patients with elevated baseline ALP without ALP response after the first injection had significantly shorter times to ALP progression and first skeletal-related event, and more frequently discontinued radium-223 therapy when compared to other patients.

conclusionEarly treatment-induced changes in ALP after one radium-223 injection were associated with OS in metastatic CRPC patients.

Indexed as

Bone NeoplasmsProstatic Neoplasms, Castration-ResistantRadiumAlkaline PhosphataseBiomarkersHumansMaleRetrospective StudiesTreatment OutcomeAlkaline PhosphataseBiomarkersRadiumRadium-223Alkaline phosphataseBiomarkerBone metastasesCastration-resistant prostate cancerPrognostic variablesRadium-223

Identifiers

PMID33686456
PMCPMC8426246
OpenAlexW3134766907

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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.