ArticleBreast cancer research : BCR2020
Plasma thymidine kinase 1 activity and outcome of ER+ HER2- metastatic breast cancer patients treated with palbociclib and endocrine therapy.
Article in Breast cancer research : BCR, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02866149 (Analysis of Circulating Tumor Markers in the Blood), which is not on this map. Cited by 23 papers, 3 of them syntheses that pooled it.
What it found
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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.
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.
Analysis of Circulating Tumor Markers in the Blood
Who cites it
23 citing papers in PubMed, 3 syntheses or guidelines pooled it, 28 citations in OpenAlex.
- Efficacy and Safety of Cyclin-Dependent Kinase 4/6 Inhibitors in Patients with Breast Cancer: A Systematic Review and Meta-analysis of Randomized Controlled Trials and Real-World Studies.Targeted oncology · 2025Pooled it
- Palbociclib in Older Patients with Advanced/Metastatic Breast Cancer: A Systematic Review.Targeted oncology · 2024Pooled it
- Systematic Review of Molecular Biomarkers Predictive of Resistance to CDK4/6 Inhibition in Metastatic Breast Cancer.JCO precision oncology · 2022Pooled it
- Thymidine kinase activity levels in serum can identify HR+ metastatic breast cancer patients with a low risk of early progression (SWOG S0226).Biomarkers : biochemical indicators of exposure, response, and susceptibility to chemicals · 2023Trial
- Prognostic role of thymidine kinase 1 activity in hormone receptor positive metastatic breast cancer. A systematic review and meta-analysis.Breast (Edinburgh, Scotland) · 2026Review
- The evolving landscape of CDK inhibitor use in breast cancer therapy and beyond.Nature reviews. Drug discovery · 2026Review
- Prognostic performance of thymidine kinase 1 activity in patients with hormone receptor-positive and HER2-negative metastatic breast cancer treated with CDK4/6 and aromatase inhibitors.Breast cancer research and treatment · 2026Observational
- Bone Metastasis in Estrogen Receptor-Positive Breast Cancer: Molecular Insights and Therapeutic Advances.International journal of molecular sciences · 2026Review
- Real-World Plasma Thymidine Kinase Activity in High-Risk and Metastatic Hormone Receptor-Positive, Human Epidermal Growth Factor Receptor 2-Negative Breast Cancer Treated With Cyclin-Dependent Kinase 4/6 Inhibitors.JCO precision oncology · 2026Observational
- Biomarkers of primary and secondary resistance to cyclin dependent kinases 4 and 6 inhibitors in metastatic estrogen receptor-positive/human epidermal growth factor receptor 2-negative breast cancer: a narrative review.Translational breast cancer research : a journal focusing on translational research in breast cancer · 2026Review
- Relationship of Prior Anticancer Treatments with Palbociclib Clinical Outcomes in Patients with HRTargeted oncology · 2025Observational
- Thymidine kinase 1 concentration and activity in metastatic breast cancer under CDK4/6 inhibitor therapy.Scientific reports · 2025Article
- Beyond Hormone Receptors: liquid biopsy tools to unveil new clinical meanings and empower therapeutic decision-making in Luminal-like metastatic breast cancer.Breast (Edinburgh, Scotland) · 2025Review
- Cyclin-dependent kinase 4 and 6 inhibitors (CDK4/6i): Mechanisms of resistance and where to find them.Breast (Edinburgh, Scotland) · 2025Review
- Expression Profile of Thymidine Kinase Genes in Cervical Squamous Cell Carcinoma Confirmed by Various Detection Methods.World journal of oncology · 2025Article
- Multi-stage mechanisms of tumor metastasis and therapeutic strategies.Signal transduction and targeted therapy · 2024Review
- Multi-Omics Integration Analysis of TK1 in Glioma: A Potential Biomarker for Predictive, Preventive, and Personalized Medical Approaches.Brain sciences · 2023Article
- A phase II trial of an alternative schedule of palbociclib and embedded serum TK1 analysis.NPJ breast cancer · 2022Article
- Article
- Clinical Value on Combined Detection of Serum CA724, DKK1, and TK1 in Diagnosis of Gastric Cancer.Journal of oncology · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
14 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposePrevious cohort studies have reported plasma TK1 activity (pTKa) as a potential prognostic biomarker in estrogen receptor-positive (ER+) HER2-negative (HER2-) metastatic breast cancer (MBC). In this prospective study, we report here the prognostic impact of pTKa in ER+/HER2- MBC patients treated with endocrine therapy and CDK4/6 inhibitor. EXPERIMENTAL
designPatients were included into the prospective, ethics committee-approved ALCINA study (NCT02866149). Eligibility criteria were patients with ER+/HER2- MBC treated at Institut Curie with endocrine therapy and palbociclib. Plasma samples were obtained at baseline and after 4 weeks of treatment. pTKa was quantified by the DiviTum® assay (Biovica, Sweden).
resultsFrom May 2016 to August 2018, 103 patients treated with endocrine therapy and palbociclib were included. Patients had received a median of two prior systemic therapies for MBC (range 0-14). Median follow-up was 13.8 months (range 6-31), with median PFS and OS of 9.6 months (95%CI [7.0-11.3]) and 28 months (95%CI [23-not reached]), respectively. Median baseline pTKa was 292 Du/L (range 20-27,312 Du/L, IQR [89-853]). After adjusting for other prognostic factors, baseline pTKa remained an independent prognostic factor for both PFS (HR = 1.3 95%CI [1.1-1.4], p = 0.0005) and OS (HR = 1.3 95%CI [1.2-1.6], p < 0.0001), and 4-week pTKa was associated with OS (HR = 1.6 95%CI [1.3-2], p < 0.0001). That survival prediction was significantly improved by the addition of baseline pTKa to clinicopathological characteristics. Adding pTKa changes at 4 weeks to baseline pTKa did not further increase survival prediction.
conclusionThis study demonstrates the clinical validity of pTKa as a new circulating prognostic marker in ER+/HER2- MBC patients treated with endocrine therapy and palbociclib.
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