1
|
Perissinotti A, Collantes M, Llopis J, Ecay M, Velloso MG, Moreno A, Peñuelas I, Fuster D, Miró J, Mària CGDL. Metabolismo de la fdg en Médula ósea y Bazo Como Signo Indirecto de Infección en un Modelo Experimental de Endocarditis. Cirugía Cardiovascular 2022. [DOI: 10.1016/j.circv.2022.03.017] [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: 11/28/2022] Open
|
2
|
Tainta M, Ecay M, Iriondo A, Estanga A, Clerigue M, Saldias J, de Arriba M, Garcia‐Sebastian M, Aurtenetxe S, Barandiaran M, Gabilondo A, Mar J, Arrospide A, Vergara I, Mugica J, Mangialasche F, Ngandu T, Kivipelto M, Martinez‐Lage P. Adopting the FINGER multimodal intervention methodology to prevent cognitive decline in Southern Europe: The GOIZ ZAINDU pilot study. Alzheimers Dement 2021. [DOI: 10.1002/alz.056022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mikel Tainta
- Organización Sanitaria Integrada Goierri Alto Urola Zumárraga Spain
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | - Mirian Ecay
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | - Ane Iriondo
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | | | - Jon Saldias
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | | | | | - Myriam Barandiaran
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
- Organización Sanitaria Integrada Donostialdea Donostia‐San Sebastian Spain
| | - Alazne Gabilondo
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
- Organización Sanitaria Integrada Bidasoa Irun Spain
| | - Javier Mar
- Biodonostia Health Research Institute Donostia‐San Sebastian Spain
- Gipuzkoa Primary Care – Integrated Health Care Organizations Research Unit, Alto Deba Arrasate Spain
| | - Arantzazu Arrospide
- Biodonostia Health Research Institute Donostia‐San Sebastian Spain
- Gipuzkoa Primary Care – Integrated Health Care Organizations Research Unit, Alto Deba Arrasate Spain
| | - Itziar Vergara
- Biodonostia Health Research Institute Donostia‐San Sebastian Spain
| | - Justo Mugica
- Organización Sanitaria Integrada Goierri‐Alto Urola Beasain Spain
| | | | | | | | | |
Collapse
|
3
|
Puyalto A, Rodriguez-Remirez M, López I, Iribarren F, Ecay M, Collantes M, Vilalta-Lacarra A, Gil-Bazo I. P12.01 A Novel 89Zr-α-PD-1 Immuno-PET-CT May Improve Pseudoprogression Detection in a Lung Cancer Murine Model Receiving Immunotherapy. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.08.323] [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: 10/20/2022]
|
4
|
Bazo IG, Puyalto A, Rodriguez-Remirez M, Lopez I, Iribarren F, Torregrosa M, Ecay M, Vilalta A, Collantes M. 1775P A novel 89Zr-anti-PD-1 immuno-PET-CT improves response assessment to immunotherapy in lung cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1719] [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: 10/20/2022] Open
|
5
|
Ecay M, Tainta M, Mugica J, Arriba M, Ros N, Barandiaran M, Iriondo A, Garcia‐Sebastian M, Estanga A, Aurtenetxe S, Saldias J, Clerigue M, Otaegui A, Gabilondo A, Arrospide A, Martinez‐Lage P. Cognitive results after a FINGER‐like one‐year randomized controlled multidomain intervention: The GOIZ ZAINDU pilot project. Alzheimers Dement 2020. [DOI: 10.1002/alz.042440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mirian Ecay
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | - Justo Mugica
- Organización Sanitaria Integrada Goierri‐Alto Urola Beasain Spain
| | - Maria Arriba
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | - Naia Ros
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | - Ane Iriondo
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | | | | | - Jon Saldias
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | - Ane Otaegui
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | | | | |
Collapse
|
6
|
Iriondo A, Garcia‐Sebastian M, Arrospide A, Arriba M, Aurtenetxe S, Barandiaran M, Clerigue M, Ecay M, Estanga A, Gabilondo A, Izagirre A, Saldias J, Tainta M, Villanua JA, Blennow K, Zetterberg H, Mar J, Abad‐García B, Dias I, Goñi FM, Martinez‐Lage P. CSF 7‐ketocholesterol is related to β‐amyloid and white matter microstructure in healthy adults. Alzheimers Dement 2020. [DOI: 10.1002/alz.041015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ane Iriondo
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | - Arantzazu Arrospide
- Gipuzkoa Primary Care – Integrated Health Care Organizations Research Unit Alto Deba Arrasate Spain
- Biodonostia Health Research Institute San Sebastian Spain
| | - Maria Arriba
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | - Myriam Barandiaran
- Organización Sanitaria Integrada Donostialdea Donostia‐San Sebastian Spain
| | | | - Mirian Ecay
- Fundación CITA‐Alzheimer Fundazioa San Sebastian Spain
| | | | | | | | - Jon Saldias
- CITA Alzheimer Foundation Donostia‐San Sebastian Spain
| | | | | | - Kaj Blennow
- Institute of Neuroscience and Physiology the Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| | - Henrik Zetterberg
- Institute of Neuroscience and Physiology the Sahlgrenska Academy at the University of Gothenburg Gothenburg Sweden
| | - Javier Mar
- Alto Deba Hospital Arrasate‐Mondragón Spain
| | | | | | - Félix María Goñi
- University of the Basque Country (UPV/EHU) Bilbao Spain
- Instituto Biofisika (CSIC, UPV/EHU) Bilbao Spain
| | - Pablo Martinez‐Lage
- Department of Neurology Center for Research and Advanced Therapies CITA‐Alzheimer Foundation San Sebastian Spain
| |
Collapse
|
7
|
de Arcocha-Torres M, Quincoces G, Martínez-López A, Erhard A, Collantes M, Martínez-Rodríguez I, Ecay M, Banzo I, Irache J, Peñuelas I. Preparation, radiolabeling with 99mTc and 67Ga and biodistribution studies of albumin nanoparticles coated with polymers. Rev Esp Med Nucl Imagen Mol 2020. [DOI: 10.1016/j.remnie.2020.04.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
8
|
de Arcocha-Torres M, Quincoces G, Martínez-López AL, Erhard A, Collantes M, Martínez-Rodríguez I, Ecay M, Banzo I, Irache JM, Peñuelas I. Preparation, radiolabeling with 99mTc and 67Ga and biodistribution studies of albumin nanoparticles covered with polymers. Rev Esp Med Nucl Imagen Mol 2020; 39:225-232. [PMID: 32201272 DOI: 10.1016/j.remn.2020.02.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 01/28/2020] [Accepted: 02/06/2020] [Indexed: 01/06/2023]
Abstract
OBJECTIVE To optimize radiolabeling with 99mTc and 67Ga of albumin nanoparticles coated with 4 differents synthetic polymers and to evaluate their stability in vivo and in vitro, as well as their biodistribution in vivo after intravenous administration. MATERIAL AND METHODS The nanoparticles were prepared using albumin and NOTA-modified albumin by the desolvation method and coated with 4 different polymers; HPMC, GMN2, GPM2 and GTM2. They were purified, lyophilized and characterized. Radiolabelling with 99mTc was perfomed with 74 MBq of 99mTc sodium pertechnetate, previously reduced with and acid solution of tin chloride at different concentrations (0.003, 0.005, 0.007, 0.01, 0.05 and 0.1mg/ml) and at different times (5, 10, 15, 30 and 60minutes) and temperatures (room temperature, 40°C and 60°C). Radiolabelling with 67Ga was perfomed by incubation of the nanoparticles with 37 MBq of 67Gallium chloride (obtained from commercial gallium-67 citrate) at different times (10 and 30minutes) and temperatures (room temperature, 30°C and 60°C), and posterior purification with microconcentrators. The radiochemical purity was evaluated by TLC. Stability studies of radiolabeled nanoparticles in physiological serum and blood plasma were perfomed. Biodistribution studies of nanoparticles coated with GPM2 polymer were carried out in Wistar rats after intravenous administration of the nanoparticles. Control animals were carried out with 99mTc sodium pertechnetate and 67Ga chloride. To do so, the animals were killed and activity in organs was measured in a gamma counter. RESULTS 99mTc labeling was carried out optimally with a tin concentration of 0.007mg/ ml for the GPM2 nanoparticles and 0.005mg / ml for the rest of the formulations, with a radiolabelling time of 10minutes at room temperature. In the case of 67Ga the label was optimized at 30° C temperature and 30minutes of incubation. In both cases the radiochemical purity obtained was greater than 97%. The nanoparticles showed high stability in vitro after 48hours of labeling (70% nanoparticles labeled with 99mTc and 90% those labeled with 67Ga). Biodistribution studies of nanoparticles 99mTc -GPM2 and 67Ga -NOTA-GPM2 showed a high accumulation of activity in the liver at 2 and 24hours after intravenous administration. CONCLUSION The labeling procedure with 99mTc and 67Ga of albumin and albumin modified with NOTA nanoparticles allows obtaining nanoparticles with high labeling yields and adequate in vitro stability, allowing their use for in vivo studies.
Collapse
Affiliation(s)
- M de Arcocha-Torres
- Servicio Medicina Nuclear, Hospital Universitario Marqués de Valdecilla, Santander, España; Grupo de investigación Imagen Molecular (IDIVAL), Universidad de Cantabria, Santander, España.
| | - G Quincoces
- Unidad de Radiofarmacia, Servicio Medicina Nuclear, Clínica Universidad de Navarra, IdiSNA, Pamplona, España
| | - A L Martínez-López
- Departamento de Tecnología y Química Farmacéutica, Universidad de Navarra, Pamplona, España
| | - A Erhard
- Unidad de Radiofarmacia, Servicio Medicina Nuclear, Clínica Universidad de Navarra, IdiSNA, Pamplona, España
| | - M Collantes
- Unidad de investigación micropet, Servicio Medicina Nuclear, Clínica Universidad de Navarra, IdiSNA, Pamplona, España
| | - I Martínez-Rodríguez
- Servicio Medicina Nuclear, Hospital Universitario Marqués de Valdecilla, Santander, España; Grupo de investigación Imagen Molecular (IDIVAL), Universidad de Cantabria, Santander, España
| | - M Ecay
- Unidad de investigación micropet, Servicio Medicina Nuclear, Clínica Universidad de Navarra, IdiSNA, Pamplona, España
| | - I Banzo
- Servicio Medicina Nuclear, Hospital Universitario Marqués de Valdecilla, Santander, España; Grupo de investigación Imagen Molecular (IDIVAL), Universidad de Cantabria, Santander, España
| | - J M Irache
- Departamento de Tecnología y Química Farmacéutica, Universidad de Navarra, Pamplona, España
| | - I Peñuelas
- Unidad de Radiofarmacia, Servicio Medicina Nuclear, Clínica Universidad de Navarra, IdiSNA, Pamplona, España
| |
Collapse
|
9
|
Tainta M, de Arriba M, Mugica J, Barandiaran M, Ecay M, Iriondo A, Garcia-Sebastian M, Estanga A, Aurtenetxe S, Saldias J, Clerigue M, Gabilondo A, Martinez-Lage P. P4-005: GOIZ ZAINDU: A FINGER-ADAPTED MULTIDOMAIN LIFESTYLE INTERVENTION TO PREVENT DEMENTIA IN THE BASQUE COUNTRY. Alzheimers Dement 2019. [DOI: 10.1016/j.jalz.2019.06.3664] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mikel Tainta
- Fundación CITA-Alzhéimer Fundazioa; San Sebastian Spain
- Organización Sanitaria Integrada Goierri Alto Urola; Zumárraga Spain
| | - Maria de Arriba
- Fundación CITA-Alzheimer Fundazioa, Donostia-San; Sebastian Spain
| | - Justo Mugica
- Organización Sanitaria Integrada Goierri-Alto Urola; Beasain Spain
| | - Myriam Barandiaran
- Fundación CITA-Alzheimer Fundazioa, Donostia-San; Sebastian Spain
- Organización Sanitaria Integrada Donostialdea; Donostia-San Sebastian Spain
| | - Mirian Ecay
- Fundación CITA-Alzheimer Fundazioa; San Sebastian Spain
| | - Ane Iriondo
- Fundación CITA-Alzheimer Fundazioa, Donostia-San; Sebastian Spain
| | | | | | - Sara Aurtenetxe
- Fundación CITA-Alzheimer Fundazioa, Donostia-San; Sebastian Spain
| | - Jon Saldias
- Fundación CITA-Alzheimer Fundazioa, Donostia-San; Sebastian Spain
| | | | - Alazne Gabilondo
- Fundación CITA-Alzheimer Fundazioa, Donostia-San; Sebastian Spain
- Organización Sanitaria Integrada Bidasoa; Irun Spain
| | | | | |
Collapse
|
10
|
Abizanda G, García-Velloso MJ, Gavira JJ, Martí-Climent JM, Ecay M, Collantes M, García de Jalôn JA, García-Rodríguez A, Mazo M, Barba J, Richter JA, Prôsper F, Peñuelas I. 18F-FDG metabolism in a rat model of chronic infarction. Nuklearmedizin 2017. [DOI: 10.1160/nukmed-0065] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
SummaryStrategies to establish the functional benefit of cell therapy in cardiac regeneration and the potential mechanism are needed. Aims: Development of a semi-quantitative method for non invasive assessment of cardiac viability and function in a rat model of myocardial infarction (MI) based on the use of microPET. Animals, methods: Ten rats were subjected to myocardial imaging 2, 7, 14, 30, 60 and 90 days after left coronary artery ligation. Intravenous 18F-fluoro- 2-deoxy-2-D-glucose (18F-FDG) was administered and regional 18F activity concentrations per unit area were measured in 17 regions of interest (ROIs) drawn on cardiac polar maps. By comparing the differences in 18F uptake between baseline and each of the follow up time points, parametric polar maps of statistical significance (PPMSS) were calculated. Left ventricular ejection fraction (LVEF) was blindly assessed echocardiographically. All animals were sacrificed for histopathological analysis after 90 days. Results: The diagnostic quality of 18F-FDG microPET images was excellent. PPMSS demonstrated a statistically significant decrease in 18F concentrations as early as 48 hours after MI in 4 of the 17 ROIs (segments 7, 13, 16 and 17; p <0.05) that persisted throughout the study. Semiquantitative analysis of 18F-FDG uptake correlated with echocardiographic decrease in LVEF (p <0.001). Conclusion: The use of PPMSS based on 18F-FDG-microPET provides valuable semi-quantitative information of heart glucose metabolism allowing for non-invasive follow up thus representing a useful strategy for assessment of novel therapies in cardiac regeneration.
Collapse
|
11
|
Román M, Lopez I, Zubiri L, Sanchez R, Salas D, Gardeazabal I, Baraibar I, Santisteban M, Vicent S, Gil-Aldea I, Aguillo MM, Hernandez B, Lopez-Picazo J, Gurpide A, Guruceaga E, Perez-Gracia J, Collantes M, Ecay M, Gil-Bazo I. Id1 and Id3 genes confer poor prognosis in KRAS-mutant (KM) lung adenocarcinoma (LA) patients. Gene silencing reduces metastatic rate to the liver and increases survival. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw383.70] [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: 11/14/2022] Open
|
12
|
Marti-Climent JM, Collantes M, Jauregui-Osoro M, Quincoces G, Prieto E, Bilbao I, Ecay M, Richter JA, Peñuelas I. Radiation dosimetry and biodistribution in non-human primates of the sodium/iodide PET ligand [(18)F]-tetrafluoroborate. EJNMMI Res 2015; 5:70. [PMID: 26635227 PMCID: PMC4669333 DOI: 10.1186/s13550-015-0148-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 11/25/2015] [Indexed: 12/16/2022] Open
Abstract
Background [18F]-tetrafluoroborate is a PET radiotracer taken up by the sodium/iodide symporter (NIS). Albeit the in vivo behavior in rodents is similar to the 99mTc-pertechnetate, no studies exist in primates or in humans. The aims of this study were to evaluate the biodistribution of [18F]-tetrafluoroborate in non-human primates with PET and to estimate the absorbed dose in organs. Methods Whole-body PET imaging was done in a Siemens ECAT HR+ scanner in two male Macaca fascicularis monkeys. After an i.v. injection of 24.93 ± 0.05 MBq/kg of [18F]-tetrafluoroborate, prepared by isotopic exchange of sodium tetrafluoroborate with [18F]-fluoride under acidic conditions, eight sequential images from the head to the thigh (five beds) were collected for a total duration of 132 min. The whole-body emission scan was reconstructed applying attenuation and scatter corrections. After image reconstruction, three-dimensional volumes of interest (VOIs) were hand-drawn on the PET transaxial or coronal slices of the frame where the organ was most conspicuous. Time-activity curves for each VOI were obtained, and the organ residence times were calculated by integration of the time-activity curves. Human absorbed doses were estimated using the OLINDA/EXM software and the standard human model. Results [18F]-tetrafluoroborate was able to discriminate clearly the thyroid gland with an excellent signal-to-noise ratio. Most of the radiotracers (residence time) are localised in the organs that express NIS (stomach wall, salivary glands, thyroid, olfactory mucosa), are involved in excretion (kidneys and bladder), or reflect the vascular phase (heart and lungs). Considering the OLINDA source organs, the critical organs were the stomach wall, thyroid and bladder wall, with absorbed doses lower than 0.078 mGy/MBq. The effective dose was 0.025 mSv/MBq. Conclusions [18F]-tetrafluoroborate is a very useful radiotracer for PET thyroid imaging in primates, with a characteristic biodistribution in organs expressing NIS. It delivers an effective dose slightly higher than the dose produced by 99mTc-pertechnetate but much lower than that produced by radioiodine in the form of 131INa, 123INa, or 124INa. Electronic supplementary material The online version of this article (doi:10.1186/s13550-015-0148-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- J M Marti-Climent
- Department of Nuclear Medicine, Clínica Universidad de Navarra, Avda. Pío XII, 36, 31008, Pamplona, Spain. .,Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain.
| | - M Collantes
- Department of Nuclear Medicine, Clínica Universidad de Navarra, Avda. Pío XII, 36, 31008, Pamplona, Spain. .,Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain. .,Small Animal Imaging Research Unit, Center for Applied Medical Research (CIMA) - Clínica Universidad de Navarra, Pamplona, Spain.
| | | | - G Quincoces
- Department of Nuclear Medicine, Clínica Universidad de Navarra, Avda. Pío XII, 36, 31008, Pamplona, Spain. .,Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain.
| | - E Prieto
- Department of Nuclear Medicine, Clínica Universidad de Navarra, Avda. Pío XII, 36, 31008, Pamplona, Spain. .,Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain.
| | - I Bilbao
- Small Animal Imaging Research Unit, Center for Applied Medical Research (CIMA) - Clínica Universidad de Navarra, Pamplona, Spain. .,Fundación Centro Nacional de Investigaciones Cardiovasculares (CNIC) - CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain.
| | - M Ecay
- Small Animal Imaging Research Unit, Center for Applied Medical Research (CIMA) - Clínica Universidad de Navarra, Pamplona, Spain.
| | - J A Richter
- Department of Nuclear Medicine, Clínica Universidad de Navarra, Avda. Pío XII, 36, 31008, Pamplona, Spain. .,Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain.
| | - I Peñuelas
- Department of Nuclear Medicine, Clínica Universidad de Navarra, Avda. Pío XII, 36, 31008, Pamplona, Spain. .,Instituto de Investigación Sanitaria de Navarra (IdiSNA), Pamplona, Spain. .,Small Animal Imaging Research Unit, Center for Applied Medical Research (CIMA) - Clínica Universidad de Navarra, Pamplona, Spain.
| |
Collapse
|
13
|
Tijms BM, Kate MT, Wink AM, Visser PJ, Ecay M, Clerigue M, Estanga A, Garcia Sebastian M, Izagirre A, Villanua J, Martinez Lage P, van der Flier WM, Scheltens P, Sanz Arigita E, Barkhof F. Gray matter network disruptions and amyloid beta in cognitively normal adults. Neurobiol Aging 2015; 37:154-160. [PMID: 26559882 DOI: 10.1016/j.neurobiolaging.2015.10.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [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: 06/03/2015] [Revised: 09/28/2015] [Accepted: 10/16/2015] [Indexed: 12/11/2022]
Abstract
Gray matter networks are disrupted in Alzheimer's disease (AD). It is unclear when these disruptions start during the development of AD. Amyloid beta 1-42 (Aβ42) is among the earliest changes in AD. We studied, in cognitively healthy adults, the relationship between Aβ42 levels in cerebrospinal fluid (CSF) and single-subject cortical gray matter network measures. Single-subject gray matter networks were extracted from structural magnetic resonance imaging scans in a sample of cognitively healthy adults (N = 185; age range 39-79, mini-mental state examination >25, N = 12 showed abnormal Aβ42 < 550 pg/mL). Degree, clustering coefficient, and path length were computed at whole brain level and for 90 anatomical areas. Associations between continuous Aβ42 CSF levels and single-subject cortical gray matter network measures were tested. Smoothing splines were used to determine whether a linear or nonlinear relationship gave a better fit to the data. Lower Aβ42 CSF levels were linearly associated at whole brain level with lower connectivity density, and nonlinearly with lower clustering values and higher path length values, which is indicative of a less-efficient network organization. These relationships were specific to medial temporal areas, precuneus, and the middle frontal gyrus (all p < 0.05). These results suggest that mostly within the normal spectrum of amyloid, lower Aβ42 levels can be related to gray matter networks disruptions.
Collapse
Affiliation(s)
- Betty M Tijms
- Alzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, the Netherlands.
| | - Mara Ten Kate
- Alzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, the Netherlands; Department of Radiology and Nuclear Medicine, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, the Netherlands
| | - Alle Meije Wink
- Department of Radiology and Nuclear Medicine, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, the Netherlands
| | - Pieter Jelle Visser
- Alzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, the Netherlands; Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, Maastricht, the Netherlands
| | - Mirian Ecay
- Department of Neurology, CITA-Alzheimer Foundation, San Sebastian, Spain
| | | | - Ainara Estanga
- Department of Neurology, CITA-Alzheimer Foundation, San Sebastian, Spain
| | | | - Andrea Izagirre
- Department of Neurology, CITA-Alzheimer Foundation, San Sebastian, Spain
| | - Jorge Villanua
- Department of Neurology, CITA-Alzheimer Foundation, San Sebastian, Spain; Donostia Unit, Osatek SA, Donostia University Hospital, San Sebastian, Spain
| | | | - Wiesje M van der Flier
- Alzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, the Netherlands; Department of Epidemiology and Biostatistics, VU University Medical Center, Amsterdam, the Netherlands
| | - Philip Scheltens
- Alzheimer Center and Department of Neurology, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, the Netherlands
| | | | - Frederik Barkhof
- Department of Radiology and Nuclear Medicine, Neuroscience Campus Amsterdam, VU University Medical Center, Amsterdam, the Netherlands
| |
Collapse
|
14
|
Tijms BM, Kate M, Wink AM, Visser PJ, Ecay M, Estanga A, Clerigue M, Garcia-Sebastian M, Izagirre A, Villanua J, Martinez-Lage P, Flier WM, Scheltens P, Sanz-Arigita E, Barkhof F. P3‐158: Grey matter network disruptions are related to amyloid beta in cognitively healthy elderly. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.06.1529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
| | - Maraten Kate
- VU University Medical CenterAmsterdamNetherlands
| | | | - Pieter Jelle Visser
- Alzheimer Center Limburg, School for Mental Health and NeuroscienceMaastricht UniversityMaastrichtNetherlands
- Alzheimer CenterVU University Medical CenterAmsterdamNetherlands
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Kate M, Sanz-Arigita E, Tijms BM, Wink AM, Clerigue M, Garcia-Sebastian M, Izagirre A, Ecay M, Estanga A, Villanua JA, Vrenken H, Visser PJ, Martinez-Lage P, Barkhof F. IC‐P‐108: Impact of ApoE‐Ɛ4 and family history of dementia on gray matter atrophy in cognitively healthy middle‐aged adults. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.06.130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Mara Kate
- VU University Medical CenterAmsterdamNetherlands
| | | | | | | | | | | | | | | | | | | | - Hugo Vrenken
- VU University Medical CenterAmsterdamNetherlands
| | | | | | | |
Collapse
|
16
|
Kate M, Sanz-Arigita E, Tijms BM, Wink AM, Clerigue M, Garcia-Sebastian M, Izagirre A, Ecay M, Estanga A, Villanua JA, Vrenken H, Visser PJ, Martinez-Lage P, Barkhof F. O2‐09‐01: Impact of ApoE‐ɛ4 and family history of dementia on gray matter atrophy in cognitively healthy middle‐aged adults. Alzheimers Dement 2015. [DOI: 10.1016/j.jalz.2015.07.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Mara Kate
- VU University Medical CenterAmsterdamNetherlands
| | | | | | | | | | | | | | | | | | | | - Hugo Vrenken
- VU University Medical CenterAmsterdamNetherlands
| | | | | | | |
Collapse
|
17
|
Alvarez EC, Lopez I, Ponz M, Collantes M, Ecay M, Lopez-Picazo J, Gil-Aldea I, Calvo A, Gil-Bazo I. Targeting the Expression of the Inhibitor of Differentiation (Id) Genes in Tumor Microenvironment (Tme) and Tumor Cells is Crucial in the Prevention of Liver Metastasis (Lm) from Lung Cancer. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu326.16] [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: 11/14/2022] Open
|
18
|
Collantes M, Peñuelas I, Álvarez-Erviti L, Blesa J, Martí-Climent J, Quincoces G, Delgado M, Ecay M, Martínez A, Arbizu J, Rodríguez-Oroz M, Obeso J, Richter J. Utilización de la 11C-(+)-α-dihidrotetrabenazina para la evaluación de la inervación dopaminérgica en modelos animales de la enfermedad de Parkinson. ACTA ACUST UNITED AC 2008. [DOI: 10.1157/13117191] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
19
|
Collantes M, Peñuelas I, Alvarez-Erviti L, Blesa J, Martí-Climent JM, Quincoces G, Delgado M, Ecay M, Martínez A, Arbizu J, Rodríguez-Oroz MC, Obeso J, Richter JA. [Use of 11C-(+)-alpha -dihydrotetrabenazine for the assessment of dopaminergic innervation in animal models of Parkinson's disease]. Rev Esp Med Nucl 2008; 27:103-111. [PMID: 18367048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
AIM This study evaluates the utility of (11)C-(+)-alpha -dihydrotetrabenazine ((11)C-(+)DTBZ) in the quantification of dopaminergic innervation by positron emission tomography (PET) in rat and monkey, two animal species used as animal models of Parkinson's disease. MATERIAL AND METHODS Healthy control animals (n = 10) and the effect of 6-hydroxidopamine (6-OHDA) neurotoxic were studied in rats. (18)F-DOPA PET studies and digital quantitative autoradiography were also carried out. Studies with Macaca fascicularis were performed in control and 1-methyl 4-phenyl 1, 2, 3, 6-tetrahydropyridine (MPTP) treated animals. RESULTS In both species high quality images were generated in which clear uptake of (11)C-(+)DTBZ was found in the striatum. (11)C-(+)DTBZ uptake quantification was estimated by creating parametric images and binding potential (BP) calculation. BP in control rats was 1.10 +/- 0.16 (mean +/- standard deviation [SD], whereas 6-OHDA produced a decrease in the uptake depending on the lesion degree. Images obtained with (18)F-DOPA were not adequate for the analysis as they did not discriminate the stratum whereas digital quantitative autoradiography studies confirmed the high affinity of striatum by (11)C-(+)DTBZ. In monkeys, final BP values were 1.31 and 1.06 and MPTP treatment reduced uptake by 40 %. CONCLUSIONS The quality of PET images and the decrease of uptake in 6-OHDA and MPTP lesions show that (11)C-(+)DTBZ is an adequate radiotracer for the study of dopaminergic innervation in these animal models.
Collapse
Affiliation(s)
- M Collantes
- Unidad de Investigación microPET, Centro de Investigación Médica Aplicada (CIMA)-Clínica Universitaria de Navarra, Pamplona, España.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Quincoces G, Collantes M, Catalán R, Ecay M, Prieto E, Martino E, Blesa F, Álvarez-Erviti L, Areses P, Arbizu J, Obeso J, Martí-Climent J, Richter J, Peñuelas I. Síntesis rápida y simplificada de 11C-(+)-α-dihidrotetrabenazina para su utilización como radioligando PET de los transportadores vesiculares de monoaminas. ACTA ACUST UNITED AC 2008. [DOI: 10.1157/13114365] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
21
|
Quincoces G, Collantes M, Catalán R, Ecay M, Prieto E, Martino E, Blesa FJ, Alvarez-Erviti L, Areses P, Arbizu J, Obeso JA, Martí-Climent JM, Richter JA, Peñuelas I. [Quick and simple synthesis of (11)C-(+)-alpha-dihydrotetrabenazine to be used as a PET radioligand of vesicular monoamine transporters]. Rev Esp Med Nucl 2008; 27:13-21. [PMID: 18208777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
UNLABELLED Dihydrotetrabenazine (2-hydroxy-3-isobutyl-9,10-dimethoxy-1,3,4,6,7-hexahydro-11bH-benzo[a]-quinolizine, DTBZ) has become the ideal radioligand for the presynaptic vesicular monoamine transporter VMAT2 based on its high binding affinity and optimal lipophilicity. OBJECTIVE To develop an automatic procedure for labelling DTBZ with carbon-11, which has been shown to be a highly effective marker for in vivo studies of neuronal losses in animal models with Parkinson's disease using positron emission tomography (PET). MATERIALS AND METHODS We have developed a new fully automated synthesis procedure to obtain 11C-(+)DTBZ quickly and simply through labelling the precursor -(+)desmethyldihy-drotetrabenazine- at room temperature in the presence of dimethyl sulfoxide (DMSO) and potassium hydroxide (KOH), using 11CH3I as primary precursor. The final purification was carried out by solid phase extraction using commercially available cartridges and the residual solvents (DMSO and ethyl ether) were eliminated by evaporation. RESULTS The whole procedure was automated, and after 54 syntheses, an average production of 1.94 GBq of sterile, pyrogen-free 11C-(+)DTBZ with a radiochemical purity > 99 % was obtained with 5 minutes irradiation and 6 minutes of synthesis after 11CH3I production. 11C-(+)DTBZ binding to presynaptic dopamine nerve terminals has been demonstrated by MicroPET studies in Wistar rats and M. Fascicularis monkeys. CONCLUSIONS This new synthesis procedure is quick and simple, due to optimised techniques, which have allowed elimination of residual solvents based on their polarity for the final purification. It is also applicable to other automatic syntheses for obtaining compounds labelled by methylation reactions.
Collapse
Affiliation(s)
- G Quincoces
- Unidad de Radiofarmacia, Servicio de Medicina Nuclear, Clínica Universitaria de Navarra, Pamplona, Navarra, Spain.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Peñuelas I, Abizanda G, García-Velloso MJ, Gavira JJ, Martí-Climent JM, Ecay M, Collantes M, García de Jalón JA, García-Rodríguez A, Mazo M, Barba J, Richter JA, Prósper F. 18F-FDG metabolism in a rat model of chronic infarction: a 17-sector semiquantitative analysis. Nuklearmedizin 2007; 46:149-54. [PMID: 17690793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
UNLABELLED Strategies to establish the functional benefit of cell therapy in cardiac regeneration and the potential mechanism are needed. AIMS Development of a semi-quantitative method for non invasive assessment of cardiac viability and function in a rat model of myocardial infarction (MI) based on the use of microPET. ANIMALS, METHODS Ten rats were subjected to myocardial imaging 2, 7, 14, 30, 60 and 90 days after left coronary artery ligation. Intravenous 18F-fluoro-2-deoxy-2-D-glucose (18F-FDG) was administered and regional 18F activity concentrations per unit area were measured in 17 regions of interest (ROIs) drawn on cardiac polar maps. By comparing the differences in 18F uptake between baseline and each of the follow up time points, parametric polar maps of statistical significance (PPMSS) were calculated. Left ventricular ejection fraction (LVEF) was blindly assessed echocardiographically. All animals were sacrificed for histopathological analysis after 90 days. RESULTS The diagnostic quality of 18F-FDG microPET images was excellent. PPMSS demonstrated a statistically significant decrease in 18F concentrations as early as 48 hours after MI in 4 of the 17 ROIs (segments 7, 13, 16 and 17; p < 0.05) that persisted throughout the study. Semiquantitative analysis of 18F-FDG uptake correlated with echocardiographic decrease in LVEF (p < 0.001). CONCLUSION The use of PPMSS based on 18F-FDG-microPET provides valuable semi-quantitative information of heart glucose metabolism allowing for non-invasive follow up thus representing a useful strategy for assessment of novel therapies in cardiac regeneration.
Collapse
Affiliation(s)
- I Peñuelas
- Department of Nuclear Medicine, Clínica Universitaria de Navarra, Av Pio XII 36, 31008 Pamplona, Spain.
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|