ArticlePloS one2023
GPC-100, a novel CXCR4 antagonist, improves in vivo hematopoietic cell mobilization when combined with propranolol.
Article in PloS one, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05561751 (A Phase 2, Randomized, Open-Label Study to Assess the Safety and Efficacy of GPC 100 and Propranolol With and Without G-CSF for the Mobilization of Stem Cells in Patients With Multiple Myeloma Undergoing Autologous Stem Cell Transplant), which is not on this map. Cited by 9 papers.
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.
A Phase 2, Randomized, Open-Label Study to Assess the Safety and Efficacy of GPC 100 and Propranolol With and Without G-CSF for the Mobilization of Stem Cells in Patients With Multiple Myeloma Undergoing Autologous Stem Cell Transplant
Who cites it
9 citing papers in PubMed, 13 citations in OpenAlex.
- Burixafor, a CXCR4 inhibitor with a differentiated kinetics profile: results of a phase 2 study for rapid cell mobilization in multiple myeloma and lymphoma patients undergoing transplant.Annals of hematology · 2026Trial
- C-X-C chemokine receptor type 4 (CXCR4) antagonism in precision oncology: Clinical applications and future directions.Cancer pathogenesis and therapy · 2026Review
- Emerging Considerations in Transfusion Medicine: Hematopoietic Stem and Progenitor Cell Collection for Gene Therapy for Sickle Cell Disease and Transfusion-Dependent Thalassemia.Clinics in laboratory medicine · 2026Review
- The Sympathetic Nervous Influence on Hematopoiesis Up To Date.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2025Review
- Targeting the chemokine receptor CXCR4 for cancer therapies.Biomarker research · 2025Review
- Molecular crosstalk between GPCR and receptor tyrosine-protein kinase in neuroblastoma: molecular mechanism and therapeutic implications.Medical oncology (Northwood, London, England) · 2025Review
- Regulation of CXCR4 function by S1PCell communication and signaling : CCS · 2025Article
- The β2-adrenergic receptor associates with CXCR4 multimers in human cancer cells.Proceedings of the National Academy of Sciences of the United States of America · 2024Article
- Review
Corrections and comments
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Authors and funding
22 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Autologous Stem Cell Transplant (ASCT) is increasingly used to treat hematological malignancies. A key requisite for ASCT is mobilization of hematopoietic stem cells into peripheral blood, where they are collected by apheresis and stored for later transplantation. However, success is often hindered by poor mobilization due to factors including prior treatments. The combination of G-CSF and GPC-100, a small molecule antagonist of CXCR4, showed potential in a multiple myeloma clinical trial for sufficient and rapid collection of CD34+ stem cells, compared to the historical results from the standards of care, G-CSF alone or G-CSF with plerixafor, also a CXCR4 antagonist. In the present study, we show that GPC-100 has high affinity towards the chemokine receptor CXCR4, and it potently inhibits β-arrestin recruitment, calcium flux and cell migration mediated by its ligand CXCL12. Proximity Ligation Assay revealed that in native cell systems with endogenous receptor expression, CXCR4 co-localizes with the beta-2 adrenergic receptor (β2AR). Co-treatment with CXCL12 and the β2AR agonist epinephrine synergistically increases β-arrestin recruitment to CXCR4 and calcium flux. This increase is blocked by the co-treatment with GPC-100 and propranolol, a non-selective beta-adrenergic blocker, indicating a functional synergy. In mice, GPC-100 mobilized more white blood cells into peripheral blood compared to plerixafor. GPC-100 induced mobilization was further amplified by propranolol pretreatment and was comparable to mobilization by G-CSF. Addition of propranolol to the G-CSF and GPC-100 combination resulted in greater stem cell mobilization than the G-CSF and plerixafor combination. Together, our studies suggest that the combination of GPC-100 and propranolol is a novel strategy for stem cell mobilization and support the current clinical trial in multiple myeloma registered as NCT05561751 at www.clinicaltrials.gov.
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Registered trials
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.