1
|
Said M, Tavakoli C, Dumot C, Toupet K, Dong YC, Collomb N, Auxenfans C, Moisan A, Favier B, Chovelon B, Barbier EL, Jorgensen C, Cormode DP, Noël D, Brun E, Elleaume H, Wiart M, Detante O, Rome C, Auzély-Velty R. A novel injectable radiopaque hydrogel with potent properties for multicolor CT imaging in the context of brain and cartilage regenerative therapy. bioRxiv 2023:2023.04.20.537520. [PMID: 37131613 PMCID: PMC10153246 DOI: 10.1101/2023.04.20.537520] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Cell therapy is promising to treat many conditions, including neurological and osteoarticular diseases. Encapsulation of cells within hydrogels facilitates cell delivery and can improve therapeutic effects. However, much work remains to be done to align treatment strategies with specific diseases. The development of imaging tools that enable monitoring cells and hydrogel independently is key to achieving this goal. Our objective herein is to longitudinally study an iodine-labeled hydrogel, incorporating gold-labeled stem cells, by bicolor CT imaging after in vivo injection in rodent brains or knees. To this aim, an injectable self-healing hyaluronic acid (HA) hydrogel with long-persistent radiopacity was formed by the covalent grafting of a clinical contrast agent on HA. The labeling conditions were tuned to achieve sufficient X-ray signal and to maintain the mechanical and self-healing properties as well as injectability of the original HA scaffold. The efficient delivery of both cells and hydrogel at the targeted sites was demonstrated by synchrotron K-edge subtraction-CT. The iodine labeling enabled to monitor the hydrogel biodistribution in vivo up to 3 days post-administration, which represents a technological first in the field of molecular CT imaging agents. This tool may foster the translation of combined cell-hydrogel therapies into the clinics.
Collapse
Affiliation(s)
- Moustoifa Said
- Univ. Grenoble Alpes, Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), 38041 Grenoble, France; Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | - Clément Tavakoli
- Univ. Lyon 1, Inserm U1060, CarMeN Laboratory, 69600 Oullins, France; Univ. Grenoble Alpes, Inserm, UA7 Strobe, 38000 Grenoble, France
| | - Chloé Dumot
- Univ. Lyon 1, Inserm U1060, CarMeN Laboratory, 69600 Oullins, France
| | - Karine Toupet
- IRMB, Univ. Montpellier, INSERM, CHU Montpellier, Montpellier, France
| | - Yuxi Clara Dong
- Department of Radiology and Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Nora Collomb
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | | | - Anaïck Moisan
- Cell Therapy and Engineering Unit, EFS Rhone Alpes, 38330 Saint Ismier, France
| | - Bertrand Favier
- Univ. Grenoble Alpes, Translational Innovation in Medicine & Complexity, UMR552, 38700 La Tronche, France
| | - Benoit Chovelon
- Univ. Grenoble-Alpes, Departement de Pharmacochimie Moleculaire UMR 5063, 38400 Grenoble, France; Institut de Biologie et Pathologie, CHU de Grenoble-Alpes, 38700 La Tronche, France
| | - Emmanuel Luc Barbier
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | | | - David Peter Cormode
- Department of Radiology and Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Danièle Noël
- IRMB, Univ. Montpellier, INSERM, CHU Montpellier, Montpellier, France
| | - Emmanuel Brun
- Univ. Grenoble Alpes, Inserm, UA7 Strobe, 38000 Grenoble, France
| | - Hélène Elleaume
- Univ. Grenoble Alpes, Inserm, UA7 Strobe, 38000 Grenoble, France
| | - Marlène Wiart
- Univ. Lyon 1, Inserm U1060, CarMeN Laboratory, 69600 Oullins, France
| | - Olivier Detante
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France; CHU Grenoble Alpes, Stroke Unit, Department of Neurology, 38043 Grenoble, France
| | - Claire Rome
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, 38000 Grenoble, France
| | - Rachel Auzély-Velty
- Univ. Grenoble Alpes, Centre de Recherches sur les Macromolécules Végétales (CERMAV-CNRS), 38041 Grenoble, France
| |
Collapse
|
2
|
Boux F, Forbes F, Collomb N, Zub E, Mazière L, de Bock F, Blaquiere M, Stupar V, Depaulis A, Marchi N, Barbier EL. Neurovascular multiparametric MRI defines epileptogenic and seizure propagation regions in experimental mesiotemporal lobe epilepsy. Epilepsia 2021; 62:1244-1255. [PMID: 33818790 DOI: 10.1111/epi.16886] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 03/05/2021] [Accepted: 03/05/2021] [Indexed: 12/26/2022]
Abstract
OBJECTIVE Improving the identification of the epileptogenic zone and associated seizure-spreading regions represents a significant challenge. Innovative brain-imaging modalities tracking neurovascular dynamics during seizures may provide new disease biomarkers. METHODS With use of a multi-parametric magnetic resonance imaging (MRI) analysis at 9.4 Tesla, we examined, elaborated, and combined multiple cellular and cerebrovascular MRI read-outs as imaging biomarkers of the epileptogenic and seizure-propagating regions. Analyses were performed in an experimental model of mesial temporal lobe epilepsy (MTLE) generated by unilateral intra-hippocampal injection of kainic acid (KA). RESULTS In the ipsilateral epileptogenic hippocampi, tissue T1 and blood-brain barrier (BBB) permeability to gadolinium were increased 48-72 hours post-KA, as compared to sham and contralateral hippocampi. BBB permeability endured during spontaneous focal seizures (4-6 weeks), along with a significant increase of apparent diffusion coefficient (ADC) and blood volume fraction (BVf). Simultaneously, ADC and BVf were augmented in the contralateral hippocampus, a region characterized by electroencephalographic seizure spreading, discrete histological neurovascular cell modifications, and no tissue sclerosis. We next asked whether combining all the acquired MRI parameters could deliver criteria to classify the epileptogenic from the seizure-spreading and sham hippocampi in these experimental conditions and over time. To differentiate sham from epileptogenic areas, the automatic multi-parametric classification provided a maximum accuracy of 97.5% (32 regions) 48-72 hours post-KA and of 100% (60 regions) at spontaneous seizures stage. To differentiate sham, epileptogenic, and seizure-spreading areas, the accuracies of the automatic classification were 93.1% (42 regions) 48-72 hours post-KA and 95% (80 regions) at spontaneous seizure stage. SIGNIFICANCE Combining multi-parametric MRI acquisition and machine-learning analyses delivers specific imaging identifiers to segregate the epileptogenic from the contralateral seizure-spreading hippocampi in experimental MTLE. The potential clinical value of our findings is critically discussed.
Collapse
Affiliation(s)
- Fabien Boux
- Univ. Grenoble Alpes, Grenoble Institut Neurosciences, Inserm, U1216, Grenoble 38000, France.,Inria, CNRS, G-INP, University of Grenoble Alpes, Grenoble, France
| | - Florence Forbes
- Inria, CNRS, G-INP, University of Grenoble Alpes, Grenoble, France
| | - Nora Collomb
- Univ. Grenoble Alpes, Grenoble Institut Neurosciences, Inserm, U1216, Grenoble 38000, France
| | - Emma Zub
- Cerebrovascular and Glia Research, Department of Neuroscience, Institute of Functional Genomics (University of Montpellier, UMR 5203 CNRS, U 1191 INSERM), Montpellier, France
| | - Lucile Mazière
- Univ. Grenoble Alpes, Grenoble Institut Neurosciences, Inserm, U1216, Grenoble 38000, France
| | - Fréderic de Bock
- Cerebrovascular and Glia Research, Department of Neuroscience, Institute of Functional Genomics (University of Montpellier, UMR 5203 CNRS, U 1191 INSERM), Montpellier, France
| | - Marine Blaquiere
- Cerebrovascular and Glia Research, Department of Neuroscience, Institute of Functional Genomics (University of Montpellier, UMR 5203 CNRS, U 1191 INSERM), Montpellier, France
| | - Vasile Stupar
- Univ. Grenoble Alpes, Grenoble Institut Neurosciences, Inserm, U1216, Grenoble 38000, France
| | - Antoine Depaulis
- Univ. Grenoble Alpes, Grenoble Institut Neurosciences, Inserm, U1216, Grenoble 38000, France
| | - Nicola Marchi
- Cerebrovascular and Glia Research, Department of Neuroscience, Institute of Functional Genomics (University of Montpellier, UMR 5203 CNRS, U 1191 INSERM), Montpellier, France
| | - Emmanuel L Barbier
- Univ. Grenoble Alpes, Grenoble Institut Neurosciences, Inserm, U1216, Grenoble 38000, France
| |
Collapse
|
3
|
Becq GJPC, Habet T, Collomb N, Faucher M, Delon-Martin C, Coizet V, Achard S, Barbier EL. Functional connectivity is preserved but reorganized across several anesthetic regimes. Neuroimage 2020; 219:116945. [DOI: 10.1016/j.neuroimage.2020.116945] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 04/21/2020] [Accepted: 05/11/2020] [Indexed: 12/12/2022] Open
|
4
|
Potez M, Bouchet A, Flaender M, Rome C, Collomb N, Grotzer M, Krisch M, Djonov V, Balosso J, Brun E, Laissue JA, Serduc R. Synchrotron X-Ray Boost Delivered by Microbeam Radiation Therapy After Conventional X-Ray Therapy Fractionated in Time Improves F98 Glioma Control. Int J Radiat Oncol Biol Phys 2020; 107:360-369. [PMID: 32088292 DOI: 10.1016/j.ijrobp.2020.02.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 01/29/2020] [Accepted: 02/02/2020] [Indexed: 10/25/2022]
Abstract
PURPOSE Synchrotron microbeam radiation therapy (MRT) is based on the spatial fractionation of the incident, highly collimated synchrotron beam into arrays of parallel microbeams depositing several hundred grays. It appears relevant to combine MRT with a conventional treatment course, preparing a treatment scheme for future patients in clinical trials. The efficiency of MRT delivered after several broad-beam (BB) fractions to palliate F98 brain tumors in rats in comparison with BB fractions alone was evaluated in this study. METHODS AND MATERIALS Rats bearing 106 F98 cells implanted in the caudate nucleus were irradiated by 5 fractions in BB mode (3 × 6 Gy + 2 × 8 Gy BB) or by 2 boost fractions in MRT mode to a total of 5 fractions (3 × 6 Gy BB + MRT 2 × 8 Gy valley dose; peak dose 181 Gy [50/200 μm]). Tumor growth was evaluated in vivo by magnetic resonance imaging follow-up at T-1, T7, T12, T15, T20, and T25 days after radiation therapy and by histology and flow cytometry. RESULTS MRT-boosted tumors displayed lower cell density and cell proliferation compared with BB-irradiated tumors. The MRT boost completely stopped tumor growth during ∼4 weeks and led to a significant increase in median survival time, whereas tumors treated with BB alone recurred within a few days after the last radiation fraction. CONCLUSIONS The first evidence is presented that MRT, delivered as a boost of conventionally fractionated irradiation by orthovoltage broad x-ray beams, is feasible and more efficient than conventional radiation therapy alone.
Collapse
Affiliation(s)
- Marine Potez
- Inserm UA7, Rayonnement synchrotron pour la recherche médicale (STROBE), Université Grenoble Alpes, Grenoble, France
| | - Audrey Bouchet
- Inserm UA7, Rayonnement synchrotron pour la recherche médicale (STROBE), Université Grenoble Alpes, Grenoble, France; Institute of Anatomy, Group Tomographic and Clinical Anatomy, University of Bern, Bern, Switzerland.
| | - Mélanie Flaender
- Inserm UA7, Rayonnement synchrotron pour la recherche médicale (STROBE), Université Grenoble Alpes, Grenoble, France
| | - Claire Rome
- Team Functional NeuroImaging and Brain Perfusion, Inserm, France; Grenoble Institut des Neurosciences, Université Grenoble Alpes, La Tronche, France
| | - Nora Collomb
- Team Functional NeuroImaging and Brain Perfusion, Inserm, France; Grenoble Institut des Neurosciences, Université Grenoble Alpes, La Tronche, France
| | - Michael Grotzer
- Department of Oncology, University Children's Hospital of Zurich, Switzerland
| | - Michael Krisch
- European Synchrotron Radiation Facility, Grenoble, France
| | - Valentin Djonov
- Institute of Anatomy, Group Tomographic and Clinical Anatomy, University of Bern, Bern, Switzerland
| | - Jacques Balosso
- Inserm UA7, Rayonnement synchrotron pour la recherche médicale (STROBE), Université Grenoble Alpes, Grenoble, France
| | - Emmanuel Brun
- Inserm UA7, Rayonnement synchrotron pour la recherche médicale (STROBE), Université Grenoble Alpes, Grenoble, France
| | | | - Raphaël Serduc
- Inserm UA7, Rayonnement synchrotron pour la recherche médicale (STROBE), Université Grenoble Alpes, Grenoble, France
| |
Collapse
|
5
|
Hirschler L, Collomb N, Voiron J, Köhler S, Barbier EL, Warnking JM. SAR comparison between CASL and pCASL at high magnetic field and evaluation of the benefit of a dedicated labeling coil. Magn Reson Med 2019; 83:254-261. [PMID: 31429990 DOI: 10.1002/mrm.27931] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 07/12/2019] [Accepted: 07/13/2019] [Indexed: 11/12/2022]
Abstract
PURPOSE To investigate the heating induced by (pseudo)-continuous arterial spin labeling ((p)CASL) sequences in vivo at 9.4T and to evaluate the benefit of a dedicated labeling coil. METHODS Temperature was measured continuously in the brain, neck, and rectum of 9 rats with fiber-optic temperature probes while running pCASL-EPI and CASL-EPI sequences, with labeling B1 amplitudes (B1ave ) of 3, 5, and 7 μT and using a dedicated labeling RF coil or a volume coil. From the temperature time courses, the corresponding specific absorption rate (SAR) was computed. A trade-off between SAR and labeling quality was determined based on measured inversion efficiencies. RESULTS ASL experiments with standard parameters (B1ave = 5 µT, Tacq = 4 min, labeling with volume coil) lead to a brain temperature increase due to RF of 0.72 ± 0.46 K for pCASL and 0.25 ± 0.17 K for CASL. Using a dedicated labeling coil reduced the RF-induced SAR by a factor of 10 in the brain and a factor of 2 in the neck. Besides SAR due to RF, heat from the coil decoupling circuits produced significant temperature increases. When labeling with a dedicated coil, this mechanism was the dominant source of brain heating. At equivalent RF-SAR, CASL provided slightly superior label efficiency to pCASL and is therefore the preferred sequence when an ASL coil is available. CONCLUSION B1ave = 4-5 µT provided a good compromise between label efficiency and SAR, both for pCASL and CASL. The sensitivity of animals to heating should be taken into account when optimizing preclinical ASL protocols and may require reducing scan duration or lowering B1ave .
Collapse
Affiliation(s)
- Lydiane Hirschler
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, Grenoble, France.,Bruker BioSpin, Ettlingen, Germany
| | - Nora Collomb
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, Grenoble, France.,Univ. Grenoble Alpes, Inserm, UMS017, CNRS, US3552, CHU Grenoble Alpes, IRMaGe, Grenoble, France
| | | | | | - Emmanuel L Barbier
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, Grenoble, France
| | - Jan M Warnking
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, Grenoble, France
| |
Collapse
|
6
|
Arnaud A, Forbes F, Coquery N, Collomb N, Lemasson B, Barbier EL. Fully Automatic Lesion Localization and Characterization: Application to Brain Tumors Using Multiparametric Quantitative MRI Data. IEEE Trans Med Imaging 2018; 37:1678-1689. [PMID: 29969418 DOI: 10.1109/tmi.2018.2794918] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
When analyzing brain tumors, two tasks are intrinsically linked, spatial localization, and physiological characterization of the lesioned tissues. Automated data-driven solutions exist, based on image segmentation techniques or physiological parameters analysis, but for each task separately, the other being performedmanually or with user tuning operations. In this paper, the availability of quantitative magnetic resonance (MR) parameters is combined with advancedmultivariate statistical tools to design a fully automated method that jointly performs both localization and characterization. Non trivial interactions between relevant physiologicalparameters are capturedthanks to recent generalized Student distributions that provide a larger variety of distributional shapes compared to the more standard Gaussian distributions. Probabilisticmixtures of the former distributions are then consideredto account for the different tissue types and potential heterogeneity of lesions. Discriminative multivariate features are extracted from this mixture modeling and turned into individual lesion signatures. The signatures are subsequently pooled together to build a statistical fingerprintmodel of the different lesion types that captures lesion characteristics while accounting for inter-subject variability. The potential of this generic procedure is demonstrated on a data set of 53 rats, with 36 rats bearing 4 different brain tumors, for which 5 quantitative MR parameters were acquired.
Collapse
|
7
|
Broisat A, Lemasson B, Ahmadi M, Collomb N, Bacot S, Soubies A, Fagret D, Rémy C, Ghezzi C, Barbier EL. Mapping of brain tissue hematocrit in glioma and acute stroke using a dual autoradiography approach. Sci Rep 2018; 8:9878. [PMID: 29959336 PMCID: PMC6026160 DOI: 10.1038/s41598-018-28082-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Accepted: 06/15/2018] [Indexed: 11/09/2022] Open
Abstract
Hematocrit (Hct) determines the ability of blood to carry oxygen. While changes in systemic Hct are known to impact stroke or tumor control, changes in local (tissue) Hct (tHct) induced by these diseases have however received little attention. In this study, we evaluate tHct in acute stroke and in glioma models using a new approach to map tHct across the brain, a dual isotope autoradiography, based on injections of 125I-labeled albumin and 99mTc-lalbeled red blood cells in the same animal. For validation purpose, tHct was mapped in the rat brain (i) under physiological conditions, (ii) following erythropoietin injection, and (iii) following hemodilution. Then, tHct was then mapped in stroke (middle cerebral artery occlusion) and tumor models (9LGS and C6). The mean tHct values observed in healthy brains (tHct = 29 ± 1.3%), were modified as expected by erythropoietin (tHct = 36.7 ± 2.6%) and hemodilution (tHct = 24.2 ± 2.4%). Using the proposed method, we observed a local reduction, spatially heterogeneous, in tHct following acute stroke (tHct = 19.5 ± 2.5%) and in both glioma models (9LGS: tHct = 18.5 ± 2.3%, C6: tHct = 16.1 ± 1.2%). This reduction and this heterogeneity in tHct observed in stroke and glioma raises methodological issues in perfusion imaging techniques where tHct is generally overlooked and could impact therapeutic strategies.
Collapse
Affiliation(s)
- A Broisat
- Univ. Grenoble Alpes, Inserm, CHU Grenoble Alpes, U1039, LRB, F-38000, Grenoble, France
| | - B Lemasson
- Univ. Grenoble Alpes, Inserm, U1216, GIN, F-38000, Grenoble, France
| | - M Ahmadi
- Univ. Grenoble Alpes, Inserm, CHU Grenoble Alpes, U1039, LRB, F-38000, Grenoble, France
| | - N Collomb
- Univ. Grenoble Alpes, Inserm, CHU Grenoble Alpes, IRMaGe, CNRS, F-38000, Grenoble, France
| | - S Bacot
- Univ. Grenoble Alpes, Inserm, CHU Grenoble Alpes, U1039, LRB, F-38000, Grenoble, France
| | - A Soubies
- Univ. Grenoble Alpes, Inserm, CHU Grenoble Alpes, U1039, LRB, F-38000, Grenoble, France
| | - D Fagret
- Univ. Grenoble Alpes, Inserm, CHU Grenoble Alpes, U1039, LRB, F-38000, Grenoble, France
| | - C Rémy
- Univ. Grenoble Alpes, Inserm, U1216, GIN, F-38000, Grenoble, France
| | - C Ghezzi
- Univ. Grenoble Alpes, Inserm, CHU Grenoble Alpes, U1039, LRB, F-38000, Grenoble, France
| | - E L Barbier
- Univ. Grenoble Alpes, Inserm, U1216, GIN, F-38000, Grenoble, France.
| |
Collapse
|
8
|
Lemasson B, Pannetier N, Coquery N, Boisserand LSB, Collomb N, Schuff N, Moseley M, Zaharchuk G, Barbier EL, Christen T. MR Vascular Fingerprinting in Stroke and Brain Tumors Models. Sci Rep 2016; 6:37071. [PMID: 27883015 PMCID: PMC5121626 DOI: 10.1038/srep37071] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 10/25/2016] [Indexed: 02/08/2023] Open
Abstract
In this study, we evaluated an MRI fingerprinting approach (MRvF) designed to provide high-resolution parametric maps of the microvascular architecture (i.e., blood volume fraction, vessel diameter) and function (blood oxygenation) simultaneously. The method was tested in rats (n = 115), divided in 3 models: brain tumors (9 L, C6, F98), permanent stroke, and a control group of healthy animals. We showed that fingerprinting can robustly distinguish between healthy and pathological brain tissues with different behaviors in tumor and stroke models. In particular, fingerprinting revealed that C6 and F98 glioma models have similar signatures while 9 L present a distinct evolution. We also showed that it is possible to improve the results of MRvF and obtain supplemental information by changing the numerical representation of the vascular network. Finally, good agreement was found between MRvF and conventional MR approaches in healthy tissues and in the C6, F98, and permanent stroke models. For the 9 L glioma model, fingerprinting showed blood oxygenation measurements that contradict results obtained with a quantitative BOLD approach. In conclusion, MR vascular fingerprinting seems to be an efficient technique to study microvascular properties in vivo. Multiple technical improvements are feasible and might improve diagnosis and management of brain diseases.
Collapse
Affiliation(s)
- B Lemasson
- Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France.,Inserm, U1216, F-38000 Grenoble, France
| | - N Pannetier
- Center for Imaging of Neurodegenerative diseases, Veterans Affairs Medical Centrer, San Francisco, USA.,Department of Radiology, University of California San Francisco, San Francisco, CA, USA
| | - N Coquery
- Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France.,Inserm, U1216, F-38000 Grenoble, France
| | - Ligia S B Boisserand
- Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France.,Inserm, U1216, F-38000 Grenoble, France
| | - Nora Collomb
- Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France.,Inserm, U1216, F-38000 Grenoble, France
| | - N Schuff
- Center for Imaging of Neurodegenerative diseases, Veterans Affairs Medical Centrer, San Francisco, USA.,Department of Radiology, University of California San Francisco, San Francisco, CA, USA
| | - M Moseley
- Department of Radiology, Stanford University, Stanford, California, USA
| | - G Zaharchuk
- Department of Radiology, Stanford University, Stanford, California, USA
| | - E L Barbier
- Univ. Grenoble Alpes, Grenoble Institut des Neurosciences, GIN, F-38000 Grenoble, France.,Inserm, U1216, F-38000 Grenoble, France
| | - T Christen
- Department of Radiology, Stanford University, Stanford, California, USA
| |
Collapse
|
9
|
Daoust A, Saoudi Y, Brocard J, Collomb N, Batandier C, Bisbal M, Salom� M, Andrieux A, Bohic S, Barbier E. Manganese Cytotoxicity Assay on Hippocampal Neuronal Cell Culture. Bio Protoc 2015. [DOI: 10.21769/bioprotoc.1368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
|
10
|
Gory-Fauré S, Windscheid V, Brocard J, Montessuit S, Tsutsumi R, Denarier E, Fukata Y, Bosc C, Delaroche J, Collomb N, Fukata M, Martinou JC, Pernet-Gallay K, Andrieux A. Non-microtubular localizations of microtubule-associated protein 6 (MAP6). PLoS One 2014; 9:e114905. [PMID: 25526643 PMCID: PMC4272302 DOI: 10.1371/journal.pone.0114905] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2014] [Accepted: 11/11/2014] [Indexed: 01/29/2023] Open
Abstract
MAP6 proteins (MAP6s), which include MAP6-N (also called Stable Tubule Only Polypeptide, or STOP) and MAP6d1 (MAP6 domain-containing protein 1, also called STOP-Like protein 21 kD, or SL21), bind to and stabilize microtubules. MAP6 deletion in mice severely alters integrated brain functions and is associated with synaptic defects, suggesting that MAP6s may also have alternative cellular roles. MAP6s reportedly associate with the Golgi apparatus through palmitoylation of their N-terminal domain, and specific isoforms have been shown to bind actin. Here, we use heterologous systems to investigate several biochemical properties of MAP6 proteins. We demonstrate that the three N-terminal cysteines of MAP6d1 are palmitoylated by a subset of DHHC-type palmitoylating enzymes. Analysis of the subcellular localization of palmitoylated MAP6d1, including electron microscopic analysis, reveals possible localization to the Golgi and the plasma membrane but no association with the endoplasmic reticulum. Moreover, we observed localization of MAP6d1 to mitochondria, which requires the N-terminus of the protein but does not require palmitoylation. We show that endogenous MAP6d1 localized at mitochondria in mature mice neurons as well as at the outer membrane and in the intermembrane space of purified mouse mitochondria. Last, we found that MAP6d1 can multimerize via a microtubule-binding module. Interestingly, most of these properties of MAP6d1 are shared by MAP6-N. Together, these results describe several properties of MAP6 proteins, including their intercellular localization and multimerization activity, which may be relevant to neuronal differentiation and synaptic functions.
Collapse
Affiliation(s)
- Sylvie Gory-Fauré
- Inserm, U836, Physiopathologie du cytosquelette, BP170, Grenoble, France
- University Grenoble Alpes, Grenoble Institut des Neurosciences, BP170, Grenoble, France
- * E-mail: (SGF); (AA)
| | - Vanessa Windscheid
- Inserm, U836, Physiopathologie du cytosquelette, BP170, Grenoble, France
- University Grenoble Alpes, Grenoble Institut des Neurosciences, BP170, Grenoble, France
| | - Jacques Brocard
- Inserm, U836, Physiopathologie du cytosquelette, BP170, Grenoble, France
- University Grenoble Alpes, Grenoble Institut des Neurosciences, BP170, Grenoble, France
| | - Sylvie Montessuit
- Department of Cell Biology, University of Geneva, Sciences III, Geneva, Switzerland
| | - Ryouhei Tsutsumi
- Division of Membrane Physiology, Department of Cell Physiology, National Institute for Physiological Sciences, Aichi, Japan
| | - Eric Denarier
- Inserm, U836, Physiopathologie du cytosquelette, BP170, Grenoble, France
- University Grenoble Alpes, Grenoble Institut des Neurosciences, BP170, Grenoble, France
- Commissariat à l'énergie atomique, Institut de Recherches en Technologies et Sciences pour le Vivant, Groupe Physiopathologie du Cytosquelette, Grenoble, France
| | - Yuko Fukata
- Division of Membrane Physiology, Department of Cell Physiology, National Institute for Physiological Sciences, Aichi, Japan
| | - Christophe Bosc
- Inserm, U836, Physiopathologie du cytosquelette, BP170, Grenoble, France
- University Grenoble Alpes, Grenoble Institut des Neurosciences, BP170, Grenoble, France
| | - Julie Delaroche
- Inserm, U836, Physiopathologie du cytosquelette, BP170, Grenoble, France
- University Grenoble Alpes, Grenoble Institut des Neurosciences, BP170, Grenoble, France
| | - Nora Collomb
- Inserm, U836, Physiopathologie du cytosquelette, BP170, Grenoble, France
- University Grenoble Alpes, Grenoble Institut des Neurosciences, BP170, Grenoble, France
| | - Masaki Fukata
- Division of Membrane Physiology, Department of Cell Physiology, National Institute for Physiological Sciences, Aichi, Japan
| | - Jean-Claude Martinou
- Department of Cell Biology, University of Geneva, Sciences III, Geneva, Switzerland
| | - Karin Pernet-Gallay
- Inserm, U836, Physiopathologie du cytosquelette, BP170, Grenoble, France
- University Grenoble Alpes, Grenoble Institut des Neurosciences, BP170, Grenoble, France
| | - Annie Andrieux
- Inserm, U836, Physiopathologie du cytosquelette, BP170, Grenoble, France
- University Grenoble Alpes, Grenoble Institut des Neurosciences, BP170, Grenoble, France
- Commissariat à l'énergie atomique, Institut de Recherches en Technologies et Sciences pour le Vivant, Groupe Physiopathologie du Cytosquelette, Grenoble, France
- * E-mail: (SGF); (AA)
| |
Collapse
|
11
|
Daoust A, Saoudi Y, Brocard J, Collomb N, Batandier C, Bisbal M, Salomé M, Andrieux A, Bohic S, Barbier EL. Impact of manganese on primary hippocampal neurons from rodents. Hippocampus 2014; 24:598-610. [DOI: 10.1002/hipo.22252] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 01/17/2014] [Accepted: 01/24/2014] [Indexed: 12/19/2022]
Affiliation(s)
- Alexia Daoust
- Inserm; U836 Grenoble France
- Université Grenoble Alpes, Grenoble Institut des Neurosciences; Grenoble France
| | - Yasmina Saoudi
- Inserm; U836 Grenoble France
- Université Grenoble Alpes, Grenoble Institut des Neurosciences; Grenoble France
| | - Jacques Brocard
- Inserm; U836 Grenoble France
- Université Grenoble Alpes, Grenoble Institut des Neurosciences; Grenoble France
| | - Nora Collomb
- Inserm; U836 Grenoble France
- Université Grenoble Alpes, Grenoble Institut des Neurosciences; Grenoble France
| | - Cécile Batandier
- Laboratoire de Bioénergétique Fondamentale et Appliquée; Grenoble France
| | - Mariano Bisbal
- Inserm; U836 Grenoble France
- Université Grenoble Alpes, Grenoble Institut des Neurosciences; Grenoble France
| | - Murielle Salomé
- European Synchrotron Radiation Facility (ESRF); Grenoble France
| | - Annie Andrieux
- Inserm; U836 Grenoble France
- Université Grenoble Alpes, Grenoble Institut des Neurosciences; Grenoble France
| | - Sylvain Bohic
- Inserm; U836 Grenoble France
- Université Grenoble Alpes, Grenoble Institut des Neurosciences; Grenoble France
- European Synchrotron Radiation Facility (ESRF); Grenoble France
| | - Emmanuel L. Barbier
- Inserm; U836 Grenoble France
- Université Grenoble Alpes, Grenoble Institut des Neurosciences; Grenoble France
| |
Collapse
|
12
|
Chevrier V, Piel M, Collomb N, Saoudi Y, Frank R, Paintrand M, Narumiya S, Bornens M, Job D. The Rho-associated protein kinase p160ROCK is required for centrosome positioning. J Cell Biol 2002; 157:807-17. [PMID: 12034773 PMCID: PMC2173415 DOI: 10.1083/jcb.200203034] [Citation(s) in RCA: 106] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The p160-Rho-associated coiled-coil-containing protein kinase (ROCK) is identified as a new centrosomal component. Using immunofluorescence with a variety of p160ROCK antibodies, immuno EM, and depletion with RNA interference, p160ROCK is principally bound to the mother centriole (MC) and an intercentriolar linker. Inhibition of p160ROCK provoked centrosome splitting in G1 with the MC, which is normally positioned at the cell center and shows little motion during G1, displaying wide excursions around the cell periphery, similar to its migration toward the midbody during cytokinesis. p160ROCK inhibition late after anaphase in mitosis triggered MC migration to the midbody followed by completion of cell division. Thus, p160ROCK is required for centrosome positioning and centrosome-dependent exit from mitosis.
Collapse
Affiliation(s)
- Véronique Chevrier
- Institut National de la Santé et de la Recherche Medicale U366, Département de Biologie Moléculaire et Structurale/Cytosqulette, Commissariat à l'Energie Atomique, de Grenoble, 38054 Grenoble Cedex 9, France
| | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Mouriquand J, Mermet MA, Brocard MC, Collomb N, Payan R, Panh M. [Importance of the systematic cytologic examination of breast secretions: 60 cancers diagnosed in 2120 discharges examined]. Rev Fr Gynecol Obstet 1986; 81:41-5. [PMID: 3961375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The systematic collection of breast secretions by manual expression of the breast and nipple in 2 120 patients examined for breast diseases has led to the following results: 529 (25%) disclose epithelial papillary hyperplasia, 136 of which underwent surgical control. Epithelial hyperplasia without cellular atypias was found in 9 fibroadenomas, 42 fibrocystic diseases, 29 papilloma/papillomatosis and 21 cancers. Atypical or malignant hyperplasia was observed in 42 cases. Out of 60 cancers, thus investigated, 31 (51%) had malignant cells in such induced nipple discharge, 8 (13%) atypical cells and 21 (35%) concomitant papillary hyperplasia. Systematic cytological examination of breast secretion allows to control intraductal epithelial hyperplasia and to eventually disclose malignant tumor.
Collapse
|