Details

Autor(en) / Beteiligte

• Lavigne, Jérémy
• Suissa, Alexandra
• Verger, Nicolas
• Dos Santos, Morgane
• Benadjaoud, Mohamedamine
• Mille-Hamard, Laurence
• Momken, Iman
• Soysouvanh, Frédéric
• Buard, Valérie
• Guipaud, Olivier
• Paget, Vincent
• Tarlet, Georges
• Milliat, Fabien
• François, Agnès

Titel

Lung Stereotactic Arc Therapy in Mice: Development of Radiation Pneumopathy and Influence of HIF-1α Endothelial Deletion

Ist Teil von

• International journal of radiation oncology, biology, physics, 2019-06, Vol.104 (2), p.279-290

Ort / Verlag

United States: Elsevier Inc

Erscheinungsjahr

2019

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• Stereotactic body radiation therapy offers good lung local tumor control by the administration of a high dose per fraction in small volumes. Stereotactic body radiation therapy preclinical modeling is now possible, and our aim was to develop a model of focal irradiation of the mouse lung and to investigate the impact of conditional hypoxia-inducible factor 1α (HIF-1α) deletion in the endothelium on radiation-induced tissue damage. The Small Animal Radiation Research Platform was used to create a mouse model of focal irradiation of the lung using arc therapy. HIF-1α conditional deletion was obtained by crossing mice expressing Cre recombinase under the endothelial promoter VE-cadherin (VECad-Cre+/+ mice) with HIF-1α floxed mice. Lung stereotactic arc therapy allows thoracic wall sparing and long-term studies. However, isodose curves showed that neighboring organs received significant doses of radiation, as revealed by ipsilateral lung acute red hepatization and major gene expression level modifications. Conditional HIF-1α deletion reduced acute lung edema and tended to diminish neutrophil infiltrate, but it had no impact on long-term global tissue damage. Arc therapy for focal high-dose irradiation of mouse lung is an efficient model for long-term studies. However, irradiation may have a strong impact on the structure and function of neighboring organs, which must be considered. HIF-1α conditional deletion has no beneficial impact on lung damage in this irradiation schedule.