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RESEARCH PRODUCT
Circulating hematopoietic progenitor cells in runners
Lucia CascioGiuseppe InsalacoMaria R. BonsignoreUgo TestaIgnazio MajolinoMirella ProfitaJames C. HoggFranco MirabellaAlessandra SantoroPietro AbateGioia MA. Maurizio VignolaGiuseppe MoriciMaria PaganoAnna Bonannosubject
AdultMalemedicine.medical_specialtyMarathonTime FactorsHydrocortisonePhysiologymedicine.medical_treatmentPhysical Therapy Sports Therapy and RehabilitationAntigens CD34Settore MED/10 - Malattie Dell'Apparato RespiratorioSettore BIO/09 - FisiologiaRunningEndocrinologyReference ValuesEndurance trainingPhysiology (medical)Internal medicineGranulocyte Colony-Stimulating FactormedicineHumansOrthopedics and Sports MedicineProgenitor cellCytokineBlood CellsPhysical Education and TrainingHematopoietic cellInterleukin-6business.industryGrowth factorMembrane ProteinsGrowth factorMiddle AgedHematopoietic Stem CellsEndurance trainingBlood Cell CountCytokinemedicine.anatomical_structureEndocrinologyembryonic structuresImmunologyPhysical EnduranceHematopoietic progenitor cellsBone marrowCytokines; Endurance training; Growth factors; Marathon; Physiology; Endocrinology; Orthopedics and Sports Medicine; Physical Therapy Sports Therapy and Rehabilitationbusinesshuman activitiesdescription
Because endurance exercise causes release of mediators and growth factors active on the bone marrow, we asked whether it might affect circulating hematopoietic progenitor cells (HPCs) in amateur runners [ n = 16, age: 41.8 ± 13.5 (SD) yr, training: 93.8 ± 31.8 km/wk] compared with sedentary controls ( n = 9, age: 39.4 ± 10.2 yr). HPCs, plasma cortisol, interleukin (IL)-6, granulocyte colony-stimulating factor (G-CSF), and the growth factor fms-like tyrosine kinase-3 (flt3)-ligand were measured at rest and after a marathon (M; n = 8) or half-marathon (HM; n = 8). Circulating HPC counts (i.e., CD34+cells and their subpopulations) were three- to fourfold higher in runners than in controls at baseline. They were unaffected by HM or M acutely but decreased the morning postrace. Baseline cortisol, flt3-ligand, IL-6, and G-CSF levels were similar in runners and controls. IL-6 and G-CSF increased to higher levels after M compared with HM, whereas cortisol and flt3-ligand increased similarly postrace. Our data suggest that increased HPCs reflect an adaptation response to recurrent, exercise-associated release of neutrophils and stress and inflammatory mediators, indicating modulation of bone marrow activity by habitual running.
year | journal | country | edition | language |
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2002-01-01 |