title: [Migration of bone marrow cells toward the thymus in C57BL/Ka under fractionated irradiation].
abstract: Fractionated whole body X-irradiation (4 X 1.75 Gy at weekly intervals) induces a high percentage of thymic lymphomas in C57BL/Ka mice. These tumors develop after a long latency period during which the thymic lymphopoiesis is deeply altered. In the present work, we test wether those modifications are due to lack of prothymocyte homing to preleukemic thymuses. Our results show that the preleukemic state of the thymus don't prevent the homing of normal marrow precursors grafted immediately after an irradiation of 4 Gy. Thus the alterations of thymic lymphopoiesis observed after a leukemogenic irradiation are not due to a modification in the thymus receptivity to thymocyte precursors.
mesh_terms: D000818:Animals; D001853:Bone Marrow / Q000473:pathology / Q000503:physiopathology*; D016026:Bone Marrow Transplantation; D002465:Cell Movement / Q000528:radiation effects; D005260:Female; D007953:Leukemia, Radiation-Induced / Q000209:etiology / Q000503:physiopathology*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D011289:Preleukemia / Q000209:etiology / Q000503:physiopathology*; D013950:Thymus Gland / Q000473:pathology / Q000528:radiation effects*; D014916:Whole-Body Irradiation
vernacular_title: Migration des cellules médullaires vers le thymus chez les souris C57BL/Ka soumises à une irradiation fractionnée.