Reference : Apoptosis During the Development of Radiogenic Thymic Lymphomas: Effects of Treatments I...
Scientific journals : Article
Life sciences : Anatomy (cytology, histology, embryology...) & physiology
http://hdl.handle.net/2268/75658
Apoptosis During the Development of Radiogenic Thymic Lymphomas: Effects of Treatments Inhibiting Lymphoma Development
English
Humblet, Chantal mailto [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Histologie - Cytologie >]
Denis, Ghislaine [ > > ]
Greimers, Roland mailto [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Anatomie et cytologie pathologiques >]
Boniver, Jacques mailto [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Anatomie et cytologie pathologiques]
Defresne, Marie-Paule mailto [Université de Liège - ULg > Département des sciences biomédicales et précliniques > Histologie - Cytologie >]
1998
Anticancer Research
JG Delinassios Anticancer Research
18
5A, Sep-Oct
3469-74
Yes (verified by ORBi)
International
0250-7005
Athens
Greece
[en] INTRODUCTION: Whole body fractionated irradiation induces thymic lymphomas in C57BL/Ka mice after a latent period during which preleukemic cells progressively transform into leukemic cells within an abnormal thymic microenvironment. A bone marrow graft or repeated cytokine injections prevent lymphoma development. We think that these treatments restore altered mechanisms controlling apoptosis. MATERIALS AND METHODS: Apoptosis was analyzed by flow cytometry in thymocytes from different groups of mice (control, preleukemic, prevented mice). RESULTS: The apoptotic rates did not change in freshly isolated thymocytes from different experimental groups. However, after culture, the level of apoptosis increased in preleukemic thymuses; and returned to normal value in cultured thymocytes from irradiated mice after lymphoma preventing treatments. Furthermore, thymic microenvironmental factors can control thymocyte apoptosis. CONCLUSION: We propose that after leukemogenic irradiation, there is an increase of cells with an activated suicide program, but that alterations of thymic environmental factors rescue them from apoptosis, allowing their further neoplastic transformation.
http://hdl.handle.net/2268/75658

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