ArticleCancers2025
CDK4/6 Inhibitors-Induced Macrocytosis Is Not Associated with Hemolysis and Does Not Impact Hemoglobin Homeostasis.
Article in Cancers, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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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.
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Who cites it
1 citing paper in PubMed.
- MCV-Neutropenia Risk Score and Overall Survival in HR+/HER2- Advanced Breast Cancer: A Multicenter Retrospective Landmark Analysis.Breast cancer (Dove Medical Press) · 2026Article
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Authors and funding
15 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundCDK 4/6 inhibitors (CDK4/6is) are the first-line treatment for metastatic luminal-like breast cancer (BC). These drugs induce macrocytosis without anemia in most patients. The mechanism for the red blood cell (RBC) changes is unknown. In vitro and animal studies show that RBCs from CDK6-knockout mice have increased membrane fragility, but the clinical impact of CDK4/6is on human RBC lifespan is not known. We sought to determine the impact of CDK4/6is on RBC lifespan and detect changes in the regulation of hemoglobin production. Using the mean corpuscular volume (MCV) measurements at several time points, we can study the evolution of MCV, mean corpuscular hemoglobin concentration (MCHC), and RBC count over time. From this, one can estimate the RBC lifespan under CDK4/6is.
methodsWe performed a unicentric retrospective study. Based on published models of RBC population dynamics, we have coded a biologically inspired model which allowed us to extract values for biological parameters, including the RBC lifespan.
resultsA total of 122 patients were identified, and 1959 laboratory measurements were analyzed. After the pre-treatment RBCs were replaced, the mean MCV increased by 12.6 femtoliter (fL) (95% Bayesian credible interval [CdI] 13-14), the MCHC increased slightly by 0.69 g/dL (95% CdI 0.42-0.96), and the RBC count decreased by 0.77 × 10 DISCUSSION AND
conclusionsThese findings suggest that, despite changes in RBC volume, CDK4/6is do not predispose patients to RBC destruction and do not impair regulation of hemoglobin homeostasis. We show that CDK4/6is do not decrease the RBC lifespan in pre-treatment erythrocytes. Unfortunately, this method cannot determine the lifespan of post-treatment RBCs, but further research could help answer this question.
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