PURPOSE OF REVIEW: Hematopoiesis is tightly regulated in the bone marrow through the microenvironment, soluble factors from the circulation, and neural inputs from the autonomic nervous system. Most physiological processes are not uniform but rather vary according to the time of day. There is increasing evidence showing the impact of biological rhythms on the traffic of hematopoietic stem cells (HSCs) and their proliferation and differentiation capacities. RECENT FINDINGS: Recent evidence supports the role of the sympathetic nervous system in the regulation of HSC behavior, both directly and through supporting stromal cells. In addition, the sympathetic nervous system transduces circadian information from the central pacemaker in the brain, the suprachiasmatic nucleus, to the bone marrow microenvironment, directing circadian oscillations in hematopoiesis and HSC migration. SUMMARY: HSC traffic and hematopoiesis do not escape the circadian regulation that controls most physiological processes. Clinically, the timing of stem cell harvest or infusion may impact the yield or engraftment, respectively, and may result in better therapeutic outcomes.
PURPOSE OF REVIEW: Hematopoiesis is tightly regulated in the bone marrow through the microenvironment, soluble factors from the circulation, and neural inputs from the autonomic nervous system. Most physiological processes are not uniform but rather vary according to the time of day. There is increasing evidence showing the impact of biological rhythms on the traffic of hematopoietic stem cells (HSCs) and their proliferation and differentiation capacities. RECENT FINDINGS: Recent evidence supports the role of the sympathetic nervous system in the regulation of HSC behavior, both directly and through supporting stromal cells. In addition, the sympathetic nervous system transduces circadian information from the central pacemaker in the brain, the suprachiasmatic nucleus, to the bone marrow microenvironment, directing circadian oscillations in hematopoiesis and HSC migration. SUMMARY: HSC traffic and hematopoiesis do not escape the circadian regulation that controls most physiological processes. Clinically, the timing of stem cell harvest or infusion may impact the yield or engraftment, respectively, and may result in better therapeutic outcomes.
Authors: L Morra; A Ponassi; G Caristo; P Bruzzi; A Bonelli; R Zunino; G B Parodi; C Sacchetti Journal: Biomed Pharmacother Date: 1984 Impact factor: 6.529
Authors: Elisabeth Filipski; Verdun M King; Marie-Christine Etienne; XiaoMei Li; Bruno Claustrat; Teresa G Granda; Gérard Milano; Michael H Hastings; Francis Lévi Journal: Am J Physiol Regul Integr Comp Physiol Date: 2004-06-24 Impact factor: 3.619
Authors: M Z Ratajczak; C H Kim; A Abdel-Latif; G Schneider; M Kucia; A J Morris; M J Laughlin; J Ratajczak Journal: Leukemia Date: 2011-09-02 Impact factor: 11.528