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Chakhoyan A, Corroyer-Dulmont A, Leblond MM, Gérault A, Toutain J, Chazaviel L, Divoux D, Petit E, MacKenzie ET, Kauffmann F, Delcroix N, Bernaudin M, Touzani O, Valable S. Carbogen-induced increases in tumor oxygenation depend on the vascular status of the tumor: A multiparametric MRI study in two rat glioblastoma models. J Cereb Blood Flow Metab 2017; 37:2270-2282. [PMID: 27496553 PMCID: PMC5464716 DOI: 10.1177/0271678x16663947] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The alleviation of hypoxia in glioblastoma with carbogen to improve treatment has met with limited success. Our hypothesis is that the eventual benefits of carbogen depend on the capacity for vasodilation. We examined, with MRI, changes in fractional cerebral blood volume, blood oxygen saturation, and blood oxygenation level dependent signals in response to carbogen. The analyses were performed in two xenograft models of glioma (U87 and U251) recognized to have different vascular patterns. Carbogen increased fractional cerebral blood volume, blood oxygen saturation, and blood oxygenation level dependent signals in contralateral tissues. In the tumor core and peritumoral regions, changes were dependent on the capacity to vasodilate rather than on resting fractional cerebral blood volume. In the highly vascularised U87 tumor, carbogen induced a greater increase in fractional cerebral blood volume and blood oxygen saturation in comparison to the less vascularized U251 tumor. The blood oxygenation level dependent signal revealed a delayed response in U251 tumors relative to the contralateral tissue. Additionally, we highlight the considerable heterogeneity of fractional cerebral blood volume, blood oxygen saturation, and blood oxygenation level dependent within U251 tumor in which multiple compartments co-exist (tumor core, rim and peritumoral regions). Finally, our study underlines the complexity of the flow/metabolism interactions in different models of glioblastoma. These irregularities should be taken into account in order to palliate intratumoral hypoxia in clinical trials.
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Affiliation(s)
- Ararat Chakhoyan
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - Aurélien Corroyer-Dulmont
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - Marine M Leblond
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - Aurélie Gérault
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - Jérôme Toutain
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - Laurent Chazaviel
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France.,5 UMS3408, GIP CYCERON, Caen, France
| | - Didier Divoux
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - Edwige Petit
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - Eric T MacKenzie
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - François Kauffmann
- 4 Normandie Univ, Esplanade de la Paix, Caen, France.,6 UMR6139 LMNO, Avenue de Côte de Nacre, Caen, France
| | - Nicolas Delcroix
- 3 UNICAEN, GIP CYCERON, Caen, France.,5 UMS3408, GIP CYCERON, Caen, France
| | - Myriam Bernaudin
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - Omar Touzani
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
| | - Samuel Valable
- 1 CNRS, UMR6301-ISTCT, CERVOxy Group, GIP CYCERON, Caen, France.,2 CEA, DSV/I2BM, GIP CYCERON, Caen, France.,3 UNICAEN, GIP CYCERON, Caen, France.,4 Normandie Univ, Esplanade de la Paix, Caen, France
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