1
|
Ghazanfari N, Doorduin J, van der Weijden CWJ, Willemsen ATM, Glaudemans AWJM, van Waarde A, Dierckx RAJO, de Vries EFJ. Pharmacokinetic Analysis of [ 18F]FES PET in the Human Brain and Pituitary Gland. Mol Imaging Biol 2024; 26:351-359. [PMID: 38263484 DOI: 10.1007/s11307-023-01880-z] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 01/25/2024]
Abstract
PURPOSE Estrogen receptors (ER) are implicated in psychiatric disorders. We assessed if ER availability in the human brain could be quantified using 16α-[18F]-fluoro-17β-estradiol ([18F]FES) positron emission tomography (PET). PROCEDURES Seven post‑menopausal women underwent a dynamic [18F]FES PET scan with arterial blood sampling. A T1-weighted MRI was acquired for anatomical information. After one week, four subjects received a selective ER degrader (SERD), four hours before the PET scan. Pharmacokinetic analysis was performed using a metabolite-corrected plasma curve as the input function. The optimal kinetic model was selected based on the Akaike information criterion and standard error of estimated parameters. Accuracy of Logan graphical analysis and standardized uptake value (SUV) was determined via correlational analyses. RESULTS The reversible two-tissue compartment model (2T4k) model with fixed K1/k2 was preferred. The total volume of distribution (VT) could be more reliably estimated than the binding potential (BPND). A high correlation of VT with Logan graphical analysis was observed, but only a moderate correlation with SUV. SERD administration resulted in a reduced VT in the pituitary gland, but not in other regions. CONCLUSIONS The optimal quantification method for [18F]FES was the 2T4k with fixed K1/k2 or Logan graphical analysis, but specific binding was only observed in the pituitary gland.
Collapse
Affiliation(s)
- Nafiseh Ghazanfari
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Janine Doorduin
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands.
| | - Chris W J van der Weijden
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Andor W J M Glaudemans
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Aren van Waarde
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Erik F J de Vries
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| |
Collapse
|
2
|
Mossel P, Arif WM, De Souza GS, Varela LG, van der Weijden CWJ, Boersma HH, Willemsen ATM, Boellaard R, Elsinga PH, Borra RJH, Dierckx RAJO, Lammertsma AA, Bartels AL, Luurtsema G. Quantification of P-glycoprotein function at the human blood-brain barrier using [ 18F]MC225 and PET. Eur J Nucl Med Mol Imaging 2023; 50:3917-3927. [PMID: 37552369 PMCID: PMC10611838 DOI: 10.1007/s00259-023-06363-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 07/24/2023] [Indexed: 08/09/2023]
Abstract
INTRODUCTION P-glycoprotein (P-gp) is one of the most studied efflux transporters at the blood-brain barrier. It plays an important role in brain homeostasis by protecting the brain from a variety of endogenous and exogeneous substances. Changes in P-gp function are associated both with the onset of neuropsychiatric diseases, including Alzheimer's disease and Parkinson's disease, and with drug-resistance, for example in treatment-resistant depression. The most widely used approach to measure P-gp function in vivo is (R)-[11C]verapamil PET. (R)-[11C]verapamil is, however, an avid P-gp substrate, which complicates the use of this tracer to measure an increase in P-gp function as its baseline uptake is already very low. [18F]MC225 was developed to measure both increases and decreases in P-gp function. AIM The aim of this study was (1) to identify the pharmacokinetic model that best describes [18F]MC225 kinetics in the human brain and (2) to determine test-retest variability. METHODS Five (2 male, 3 female) of fourteen healthy subjects (8 male, 6 female, age 67 ± 5 years) were scanned twice (injected dose 201 ± 47 MBq) with a minimum interval of 2 weeks between scans. Each scanning session consisted of a 60-min dynamic [18F]MC225 scan with continuous arterial sampling. Whole brain grey matter data were fitted to a single tissue compartment model, and to reversible and irreversible two tissue-compartment models to obtain various outcome parameters (in particular the volume of distribution (VT), Ki, and the rate constants K1 and k2). In addition, a reversible two-tissue compartment model with fixed k3/k4 was included. The preferred model was selected based on the weighted Akaike Information Criterion (AIC) score. Test-retest variability (TRTV) was determined to assess reproducibility. RESULTS Sixty minutes post-injection, the parent fraction was 63.8 ± 4.0%. The reversible two tissue compartment model corrected for plasma metabolites with an estimated blood volume (VB) showed the highest AIC weight score of 34.3 ± 17.6%. The TRVT of the VT for [18F]MC225 PET scans was 28.3 ± 20.4% for the whole brain grey matter region using this preferred model. CONCLUSION [18F]MC225 VT, derived using a reversible two-tissue compartment model, is the preferred parameter to describe P-gp function in the human BBB. This outcome parameter has an average test-retest variability of 28%. TRIAL REGISTRATION EudraCT 2020-001564-28 . Registered 25 May 2020.
Collapse
Affiliation(s)
- Pascalle Mossel
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Wejdan M Arif
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- College of Applied Medical Science, Department of Radiological Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Giordana Salvi De Souza
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Lara Garcia Varela
- Molecular Imaging Biomarkers Group, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela (USC), 15706, Santiago de Compostela, Spain
- Nuclear Medicine Department and Molecular Imaging Group, Health Research Institute of Santiago de Compostela (IDIS), SERGAS, 15706, Santiago de Compostela, Spain
| | - Chris W J van der Weijden
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Radiology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Hendrikus H Boersma
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Ronald Boellaard
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
- Department of Radiology and Nuclear Medicine, UMC, Location VUmc, Amsterdam, The Netherlands
| | - Philip H Elsinga
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Ronald J H Borra
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Adriaan A Lammertsma
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Anna L Bartels
- Department of Neurology, Ommelander Ziekenhuis Groep, Scheemda, The Netherlands
| | - Gert Luurtsema
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands.
| |
Collapse
|
3
|
Roya M, Mostafapour S, Mohr P, Providência L, Li Z, van Snick JH, Brouwers AH, Noordzij W, Willemsen ATM, Dierckx RAJO, Lammertsma AA, Glaudemans AWJM, Tsoumpas C, Slart RHJA, van Sluis J. Current and Future Use of Long Axial Field-of-View Positron Emission Tomography/Computed Tomography Scanners in Clinical Oncology. Cancers (Basel) 2023; 15:5173. [PMID: 37958347 PMCID: PMC10648837 DOI: 10.3390/cancers15215173] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 09/16/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 11/15/2023] Open
Abstract
The latest technical development in the field of positron emission tomography/computed tomography (PET/CT) imaging has been the extension of the PET axial field-of-view. As a result of the increased number of detectors, the long axial field-of-view (LAFOV) PET systems are not only characterized by a larger anatomical coverage but also by a substantially improved sensitivity, compared with conventional short axial field-of-view PET systems. In clinical practice, this innovation has led to the following optimization: (1) improved overall image quality, (2) decreased duration of PET examinations, (3) decreased amount of radioactivity administered to the patient, or (4) a combination of any of the above. In this review, novel applications of LAFOV PET in oncology are highlighted and future directions are discussed.
Collapse
Affiliation(s)
- Mostafa Roya
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Samaneh Mostafapour
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Philipp Mohr
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Laura Providência
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Zekai Li
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Johannes H. van Snick
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Adrienne H. Brouwers
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Walter Noordzij
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Antoon T. M. Willemsen
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Rudi A. J. O. Dierckx
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Adriaan A. Lammertsma
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Andor W. J. M. Glaudemans
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Charalampos Tsoumpas
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| | - Riemer H. J. A. Slart
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
- Department of Biomedical Photonic Imaging, Faculty of Science and Technology, University of Twente, 7522 NB Enchede, The Netherlands
| | - Joyce van Sluis
- Department of Nuclear Medicine and Molecular Imaging, Medical Imaging Center, University Medical Center Groningen, University of Groningen, P.O. Box 30001, 9700 RB Groningen, The Netherlands; (S.M.); (P.M.); (L.P.); (Z.L.); (J.H.v.S.); (A.H.B.); (W.N.); (A.T.M.W.); (R.A.J.O.D.); (A.A.L.); (A.W.J.M.G.); (C.T.); (J.v.S.)
| |
Collapse
|
4
|
van der Weijden CWJ, Mossel P, Bartels AL, Dierckx RAJO, Luurtsema G, Lammertsma AA, Willemsen ATM, de Vries EFJ. Non-invasive kinetic modelling approaches for quantitative analysis of brain PET studies. Eur J Nucl Med Mol Imaging 2023; 50:1636-1650. [PMID: 36651951 PMCID: PMC10119247 DOI: 10.1007/s00259-022-06057-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [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: 08/11/2022] [Accepted: 11/21/2022] [Indexed: 01/19/2023]
Abstract
Pharmacokinetic modelling with arterial sampling is the gold standard for analysing dynamic PET data of the brain. However, the invasive character of arterial sampling prevents its widespread clinical application. Several methods have been developed to avoid arterial sampling, in particular reference region methods. Unfortunately, for some tracers or diseases, no suitable reference region can be defined. For these cases, other potentially non-invasive approaches have been proposed: (1) a population based input function (PBIF), (2) an image derived input function (IDIF), or (3) simultaneous estimation of the input function (SIME). This systematic review aims to assess the correspondence of these non-invasive methods with the gold standard. Studies comparing non-invasive pharmacokinetic modelling methods with the current gold standard methods using an input function derived from arterial blood samples were retrieved from PubMed/MEDLINE (until December 2021). Correlation measurements were extracted from the studies. The search yielded 30 studies that correlated outcome parameters (VT, DVR, or BPND for reversible tracers; Ki or CMRglu for irreversible tracers) from a potentially non-invasive method with those obtained from modelling using an arterial input function. Some studies provided similar results for PBIF, IDIF, and SIME-based methods as for modelling with an arterial input function (R2 = 0.59-1.00, R2 = 0.71-1.00, R2 = 0.56-0.96, respectively), if the non-invasive input curve was calibrated with arterial blood samples. Even when the non-invasive input curve was calibrated with venous blood samples or when no calibration was applied, moderate to good correlations were reported, especially for the IDIF and SIME (R2 = 0.71-1.00 and R2 = 0.36-0.96, respectively). Overall, this systematic review illustrates that non-invasive methods to generate an input function are still in their infancy. Yet, IDIF and SIME performed well, not only with arterial blood calibration, but also with venous or no blood calibration, especially for some tracers without plasma metabolites, which would potentially make these methods better suited for clinical application. However, these methods should still be properly validated for each individual tracer and application before implementation.
Collapse
Affiliation(s)
- Chris W J van der Weijden
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands.,Department of Radiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen, The Netherlands
| | - Pascalle Mossel
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Anna L Bartels
- Department of Neurology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen, The Netherlands
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Gert Luurtsema
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Adriaan A Lammertsma
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Erik F J de Vries
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands.
| |
Collapse
|
5
|
van der Weijden CWJ, van der Hoorn A, Wang Y, Willemsen ATM, Dierckx RAJO, Lammertsma AA, de Vries EFJ. Investigation of image-derived input functions for non-invasive quantification of myelin density using [ 11C]MeDAS PET. Neuroimage 2022; 264:119772. [PMID: 36436711 DOI: 10.1016/j.neuroimage.2022.119772] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 11/01/2022] [Accepted: 11/23/2022] [Indexed: 11/27/2022] Open
Abstract
Multiple sclerosis (MS) is an inflammatory demyelinating disease. Current treatments are focussed on immune suppression to modulate pathogenic activity that causes myelin damage. New treatment strategies are needed to prevent demyelination and promote remyelination. Development of such myelin repair therapies require a sensitive and specific biomarker for efficacy evaluation. Recently, it has been shown that quantification of myelin density is possible using [11C]MeDAS PET. This method, however, requires arterial blood sampling to generate an arterial input function (AIF). As the invasive nature of arterial sampling will reduce clinical applicability, the purpose of this study was to assess whether an image-derived input function (IDIF) can be used as an alternative way to facilitate its routine clinical use. Six healthy controls and 11 MS patients underwent MRI and [11C]MeDAS PET with arterial blood sampling. The application of both population-based whole blood-to-plasma conversion and metabolite corrections were assessed for the AIF. Next, summed images of the early time frames (0-70 s) and the frame with the highest blood-brain contrast were used to generate IDIFs. IDIFs were created using either the hottest 2, 4, 6 or 12 voxels, or an isocontour of the hottest 10% voxels of the carotid artery. This was followed by blood-to-plasma conversion and metabolite correction of the IDIF. The application of a population-based metabolite correction of the AIF resulted in high correlations of tracer binding (Ki) within subjects, but variable bias across subjects. All IDIFs had a sharper and higher peak in the blood curves than the AIF, most likely due to dispersion during blood sampling. All IDIF methods resulted in similar high correlations within subjects (r = 0.95-0.98), but highly variable bias across subjects (mean slope=0.90-1.09). Therefore, both the use of population based blood-plasma and metabolite corrections and the generation of the image-derived whole-blood curve resulted in substantial bias in [11C]MeDAS PET quantification, due to high inter-subject variability. Consequently, when unbiased quantification of [11C]MeDAS PET data is required, individual AIF needs to be used.
Collapse
Affiliation(s)
- Chris W J van der Weijden
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen 9713GZ, the Netherlands
| | - Anouk van der Hoorn
- Radiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen 9713GZ, the Netherlands
| | - Yanming Wang
- Department of Radiology, Case Western Reserve University, Cleveland, OH 44106, United States
| | - Antoon T M Willemsen
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen 9713GZ, the Netherlands
| | - Rudi A J O Dierckx
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen 9713GZ, the Netherlands
| | - Adriaan A Lammertsma
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen 9713GZ, the Netherlands
| | - Erik F J de Vries
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen 9713GZ, the Netherlands.
| |
Collapse
|
6
|
Prasad K, de Vries EFJ, Sijbesma JWA, Garcia-Varela L, Vazquez-Matias DA, Moraga-Amaro R, Willemsen ATM, Dierckx RAJO, van Waarde A. Impact of an Adenosine A 2A Receptor Agonist and Antagonist on Binding of the Dopamine D 2 Receptor Ligand [ 11C]raclopride in the Rodent Striatum. Mol Pharm 2022; 19:2992-3001. [PMID: 35849844 PMCID: PMC9346611 DOI: 10.1021/acs.molpharmaceut.2c00450] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Adenosine A2A and dopamine D2 receptors in the basal ganglia form heterotetrameric structures that are involved in the regulation of motor activity and neuropsychiatric functions. The present study examines the A2A receptor-mediated modulation of D2 receptor binding in vivo using positron emission tomography (PET) with the D2 antagonist tracer [11C]raclopride. Healthy male Wistar rats (n = 8) were scanned (60 min dynamic scan) with [11C]raclopride at baseline and 7 days later following an acute administration of the A2A agonist CGS21680 (1 mg/kg), using a MicroPET Focus-220 camera. Nondisplaceable binding potential (BPND) values were calculated using a simplified reference tissue model (SRTM), with cerebellum as the reference tissue. SRTM analysis did not show any significant changes in [11C]raclopride BPND (p = 0.102) in striatum after CGS21680 administration compared to the baseline. As CGS21680 strongly affects hemodynamics, we also used arterial blood sampling and a metabolite-corrected plasma input function for compartment modeling using the reversible two-tissue compartment model (2TCM) to obtain the BPND from the k3/k4 ratio and from the striatum/cerebellum volume of distribution ratio (DVR) in a second group of animals. These rats underwent dynamic [11C]raclopride scans after pretreatment with a vehicle (n = 5), a single dose of CGS21680 (1 mg/kg, n = 5), or a single dose of the A2A antagonist KW6002 (1 mg/kg, n = 5). The parent fraction in plasma was significantly higher in the CGS21680-treated group (p = 0.0001) compared to the vehicle-treated group. GCS21680 administration significantly reduced the striatal k3/k4 ratio (p < 0.01), but k3 and k4 estimates may be less reliable. The BPND (DVR-1) decreased from 1.963 ± 0.27 in the vehicle-treated group to 1.53 ± 0.55 (p = 0.080) or 1.961 ± 0.11 (p = 0.993) after the administration of CGS21680 or KW6002, respectively. Our study suggests that the A2A agonist CGS21680, but not the antagonist KW6002, may reduce the D2 receptor availability in the striatum.
Collapse
Affiliation(s)
- Kavya Prasad
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9713 GZ Groningen, The Netherlands
| | - Erik F J de Vries
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9713 GZ Groningen, The Netherlands
| | - Jürgen W A Sijbesma
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9713 GZ Groningen, The Netherlands
| | - Lara Garcia-Varela
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9713 GZ Groningen, The Netherlands
| | - Daniel A Vazquez-Matias
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9713 GZ Groningen, The Netherlands
| | - Rodrigo Moraga-Amaro
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9713 GZ Groningen, The Netherlands
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9713 GZ Groningen, The Netherlands
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9713 GZ Groningen, The Netherlands
| | - Aren van Waarde
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, P.O. Box 30001, 9713 GZ Groningen, The Netherlands
| |
Collapse
|
7
|
Ghazanfari N, van Waarde A, Doorduin J, Sijbesma JWA, Kominia M, Koelewijn M, Attia K, Vállez-García D, Willemsen ATM, Heeres A, Dierckx RAJO, Visser TJ, de Vries EFJ, Elsinga PH. Binding of the Dual-Action Anti-Parkinsonian Drug AG-0029 to Dopamine D 2 and Histamine H 3 Receptors: A PET Study in Healthy Rats. Mol Pharm 2022; 19:2287-2298. [PMID: 35732005 PMCID: PMC9257755 DOI: 10.1021/acs.molpharmaceut.2c00121] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
Introduction: Parkinson’s disease (PD) is a
neurodegenerative disorder characterized by motor dysfunction and
a diverse range of nonmotor symptoms. Functional relationships between
the dopaminergic and histaminergic systems suggest that dual-action
pharmaceuticals like AG-0029 (D2/D3 agonist/H3 antagonist) could ameliorate both the motor and cognitive
symptoms of PD. The current study aimed to demonstrate the interaction
of AG-0029 with its intended targets in the mammalian brain using
positron emission tomography (PET). Methods: Healthy
male Wistar rats were scanned with a small-animal PET camera, using
either the dopamine D2/D3 receptor ligand [11C]raclopride or the histamine H3 receptor ligand
[11C]GSK-189254, before and after treatment with an intravenous,
acute, single dose of AG-0029. Dynamic [11C]raclopride
PET data (60 min duration) were analyzed using the simplified reference
tissue model 2 (SRTM2) with cerebellum as reference tissue and the
nondisplaceable binding potential as the outcome parameter. Data from
dynamic [11C]GSK-189254 scans (60 min duration) with arterial
blood sampling were analyzed using Logan graphical analysis with the
volume of distribution (VT) as the outcome
parameter. Receptor occupancy was estimated using a Lassen plot. Results: Dopamine D2/3 receptor occupancies in
the striatum were 22.6 ± 18.0 and 84.0 ± 3.5% (mean ±
SD) after administration of 0.1 and 1 mg/kg AG-0029, respectively.
In several brain regions, the VT values
of [11C]GSK-189254 were significantly reduced after pretreatment
of rats with 1 or 10 mg/kg AG-0029. The H3 receptor occupancies
were 11.9 ± 8.5 and 40.3 ± 11.3% for the 1 and 10 mg/kg
doses of AG-0029, respectively. Conclusions: Target engagement
of AG-0029 as an agonist at dopamine D2/D3 receptors
and an antagonist at histamine H3 receptors could be demonstrated
in the rat brain with [11C]raclopride and [11C]GSK-189254 PET, respectively. The measured occupancy values reflect
the previously reported high (subnanomolar) affinity of AG-0029 to
D2/D3 and moderate (submicromolar) affinity
to H3 receptors.
Collapse
Affiliation(s)
- Nafiseh Ghazanfari
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Aren van Waarde
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Janine Doorduin
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Jürgen W A Sijbesma
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Maria Kominia
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | | | - Khaled Attia
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - David Vállez-García
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - André Heeres
- Symeres B.V., Kadijk 3, 9747 AT Groningen, The Netherlands
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Ton J Visser
- Symeres B.V., Kadijk 3, 9747 AT Groningen, The Netherlands
| | - Erik F J de Vries
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| | - Philip H Elsinga
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands
| |
Collapse
|
8
|
van der Weijden CWJ, Meilof JF, van der Hoorn A, Zhu J, Wu C, Wang Y, Willemsen ATM, Dierckx RAJO, Lammertsma AA, de Vries EFJ. Quantitative assessment of myelin density using [ 11C]MeDAS PET in patients with multiple sclerosis: a first-in-human study. Eur J Nucl Med Mol Imaging 2022; 49:3492-3507. [PMID: 35366079 PMCID: PMC9308583 DOI: 10.1007/s00259-022-05770-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 03/19/2022] [Indexed: 12/21/2022]
Abstract
Purpose Multiple sclerosis (MS) is a disease characterized by inflammatory demyelinated lesions. New treatment strategies are being developed to stimulate myelin repair. Quantitative myelin imaging could facilitate these developments. This first-in-man study aimed to evaluate [11C]MeDAS as a PET tracer for myelin imaging in humans. Methods Six healthy controls and 11 MS patients underwent MRI and dynamic [11C]MeDAS PET scanning with arterial sampling. Lesion detection and classification were performed on MRI. [11C]MeDAS time-activity curves of brain regions and MS lesions were fitted with various compartment models for the identification of the best model to describe [11C]MeDAS kinetics. Several simplified methods were compared to the optimal compartment model. Results Visual analysis of the fits of [11C]MeDAS time-activity curves showed no preference for irreversible (2T3k) or reversible (2T4k) two-tissue compartment model. Both volume of distribution and binding potential estimates showed a high degree of variability. As this was not the case for 2T3k-derived net influx rate (Ki), the 2T3k model was selected as the model of choice. Simplified methods, such as SUV and MLAIR2 correlated well with 2T3k-derived Ki, but SUV showed subject-dependent bias when compared to 2T3k. Both the 2T3k model and the simplified methods were able to differentiate not only between gray and white matter, but also between lesions with different myelin densities. Conclusion [11C]MeDAS PET can be used for quantification of myelin density in MS patients and is able to distinguish differences in myelin density within MS lesions. The 2T3k model is the optimal compartment model and MLAIR2 is the best simplified method for quantification. Trial registration. NL7262. Registered 18 September 2018. Supplementary information The online version contains supplementary material available at 10.1007/s00259-022-05770-4.
Collapse
Affiliation(s)
- Chris W J van der Weijden
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen, The Netherlands
| | - Jan F Meilof
- Department of Biomedical Sciences of Cells and Systems, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
- Department of Neurology, Martini Ziekenhuis, Groningen, The Netherlands
| | - Anouk van der Hoorn
- Radiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9713GZ, Groningen, The Netherlands
| | - Junqing Zhu
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Chunying Wu
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Yanming Wang
- Department of Radiology, Case Western Reserve University, Cleveland, OH, 44106, USA
| | - Antoon T M Willemsen
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen, The Netherlands
| | - Rudi A J O Dierckx
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen, The Netherlands
| | - Adriaan A Lammertsma
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen, The Netherlands
| | - Erik F J de Vries
- Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Hanzeplein 1, Groningen, The Netherlands.
| |
Collapse
|
9
|
Ghazanfari N, van Waarde A, Doorduin J, Sijbesma JWA, Kominia M, Koelewijn M, Attia K, Willemsen ATM, Visser TJ, Heeres A, Dierckx RAJO, de Vries EFJ, Elsinga PH. Pharmacokinetic Modeling of [ 11C]GSK-189254, PET Tracer Targeting H 3 Receptors, in Rat Brain. Mol Pharm 2022; 19:918-928. [PMID: 35170965 PMCID: PMC8905578 DOI: 10.1021/acs.molpharmaceut.1c00889] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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] [Indexed: 12/22/2022]
Abstract
![]()
The histamine H3 receptor has been considered as a target
for the treatment of various central nervous system diseases. Positron
emission tomography (PET) studies with the radiolabeled potent and
selective histamine H3 receptor antagonist [11C]GSK-189254 in rodents could be used to examine the mechanisms of
action of novel therapeutic drugs or to assess changes of regional
H3 receptor density in animal models of neurodegenerative
disease. [11C]GSK-189254 was intravenously administered
to healthy Wistar rats (n = 10), and a 60 min dynamic
PET scan was carried out. Arterial blood samples were obtained during
the scan to generate a metabolite-corrected plasma input function.
PET data were analyzed using a one-tissue compartment model (1T2k),
irreversible (2T3k) or reversible two-tissue compartment models (2T4k),
graphical analysis (Logan and Patlak), reference tissue models (SRTM
and SRTM2), and standard uptake values (SUVs). The Akaike information
criterion and the standard error of the estimated parameters were
used to select the most optimal quantification method. This study
demonstrated that the 2T4k model with a fixed blood volume fraction
and Logan graphical analysis can best describe the kinetics of [11C]GSK-189254 in the rat brain. SUV40–60 and the reference tissue-based measurements DVR(2T4k), BPND(SRTM), and SUV ratio could also be used as a simplified method to
estimate H3 receptor availability in case blood sampling
is not feasible.
Collapse
Affiliation(s)
- Nafiseh Ghazanfari
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| | - Aren van Waarde
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| | - Janine Doorduin
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| | - Jürgen W A Sijbesma
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| | - Maria Kominia
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| | | | - Khaled Attia
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| | - Antoon T M Willemsen
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| | | | | | - Rudi A J O Dierckx
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| | - Erik F J de Vries
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| | - Philip H Elsinga
- University Medical Center Groningen, Department of Nuclear Medicine and Molecular Imaging, University of Groningen, Groningen 9700 RB, The Netherlands
| |
Collapse
|
10
|
Boers J, Loudini N, de Haas RJ, Willemsen ATM, van der Vegt B, de Vries EGE, Hospers GAP, Schröder CP, Glaudemans AWJM, de Vries EFJ. Analyzing the Estrogen Receptor Status of Liver Metastases with [ 18F]-FES-PET in Patients with Breast Cancer. Diagnostics (Basel) 2021; 11:diagnostics11112019. [PMID: 34829366 PMCID: PMC8617814 DOI: 10.3390/diagnostics11112019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 06/18/2021] [Revised: 10/03/2021] [Accepted: 10/21/2021] [Indexed: 11/16/2022] Open
Abstract
Background: Positron emission tomography (PET) with 16α-[18F]-fluoro-17β-estradiol ([18F]-FES) can visualize estrogen receptor (ER) expression, but it is challenging to determine the ER status of liver metastases, due to high physiological [18F]-FES uptake. We evaluated whether [18F]-FES-PET can be used to determine the ER status of liver metastases, using corresponding liver biopsies as the gold standard. Methods: Patients with metastatic breast cancer (n = 23) were included if they had undergone a [18F]-FES-PET, liver metastasis biopsy, CT-scan, and [18F]-FDG-PET. [18F]-FES-PET scans were assessed by visual and quantitative analysis, tracer uptake was correlated with ER expression measured by immunohistochemical staining and the effects of region-of-interest size and background correction were determined. Results: Visual analysis allowed ER assessment of liver metastases with 100% specificity and 18% sensitivity. Quantitative analysis improved the sensitivity. Reduction of the region-of-interest size did not further improve the results, but background correction improved ER assessment, resulting in 83% specificity and 77% sensitivity. Using separate thresholds for ER+ and ER− metastases, positive and negative predictive values of 100% and 75%, respectively, could be obtained, although 30% of metastases remained inconclusive. Conclusion: In the majority of liver metastases, ER status can be determined with [18F]-FES-PET if background correction and separate thresholds are applied.
Collapse
Affiliation(s)
- Jorianne Boers
- Department of Medical Oncology, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands; (J.B.); (E.G.E.d.V.); (G.A.P.H.); (C.P.S.)
| | - Naila Loudini
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands; (N.L.); (A.T.M.W.); (A.W.J.M.G.)
| | - Robbert J. de Haas
- Department of Radiology, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands;
| | - Antoon T. M. Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands; (N.L.); (A.T.M.W.); (A.W.J.M.G.)
| | - Bert van der Vegt
- Department of Pathology, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands;
| | - Elisabeth G. E. de Vries
- Department of Medical Oncology, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands; (J.B.); (E.G.E.d.V.); (G.A.P.H.); (C.P.S.)
| | - Geke A. P. Hospers
- Department of Medical Oncology, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands; (J.B.); (E.G.E.d.V.); (G.A.P.H.); (C.P.S.)
| | - Carolina P. Schröder
- Department of Medical Oncology, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands; (J.B.); (E.G.E.d.V.); (G.A.P.H.); (C.P.S.)
| | - Andor W. J. M. Glaudemans
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands; (N.L.); (A.T.M.W.); (A.W.J.M.G.)
| | - Erik F. J. de Vries
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, 9713 Groningen, The Netherlands; (N.L.); (A.T.M.W.); (A.W.J.M.G.)
- Correspondence: ; Tel.: +31-50-36-13599
| |
Collapse
|
11
|
Schouw HM, Huisman LA, Janssen YF, Slart RHJA, Borra RJH, Willemsen ATM, Brouwers AH, van Dijl JM, Dierckx RA, van Dam GM, Szymanski W, Boersma HH, Kruijff S. Targeted optical fluorescence imaging: a meta-narrative review and future perspectives. Eur J Nucl Med Mol Imaging 2021; 48:4272-4292. [PMID: 34633509 PMCID: PMC8566445 DOI: 10.1007/s00259-021-05504-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [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: 05/31/2021] [Accepted: 07/23/2021] [Indexed: 12/27/2022]
Abstract
Purpose The aim of this review is to give an overview of the current status of targeted optical fluorescence imaging in the field of oncology, cardiovascular, infectious and inflammatory diseases to further promote clinical translation. Methods A meta-narrative approach was taken to systematically describe the relevant literature. Consecutively, each field was assigned a developmental stage regarding the clinical implementation of optical fluorescence imaging. Results Optical fluorescence imaging is leaning towards clinical implementation in gastrointestinal and head and neck cancers, closely followed by pulmonary, neuro, breast and gynaecological oncology. In cardiovascular and infectious disease, optical imaging is in a less advanced/proof of concept stage. Conclusion Targeted optical fluorescence imaging is rapidly evolving and expanding into the clinic, especially in the field of oncology. However, the imaging modality still has to overcome some major challenges before it can be part of the standard of care in the clinic, such as the provision of pivotal trial data. Intensive multidisciplinary (pre-)clinical joined forces are essential to overcome the delivery of such compelling phase III registration trial data and subsequent regulatory approval and reimbursement hurdles to advance clinical implementation of targeted optical fluorescence imaging as part of standard practice. Supplementary Information The online version contains supplementary material available at 10.1007/s00259-021-05504-y.
Collapse
Affiliation(s)
- H M Schouw
- Department of Surgery, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - L A Huisman
- Department of Surgery, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - Y F Janssen
- Department of Surgery, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - R H J A Slart
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands.,Department of Biomedical Photonic Imaging, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands
| | - R J H Borra
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands.,Department of Radiology, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - A T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - A H Brouwers
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - J M van Dijl
- Department of Medical Microbiology, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - R A Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands.,Department of Diagnostic Sciences, Ghent University Faculty of Medicine and Health Sciences, Gent, Belgium
| | - G M van Dam
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands.,AxelaRx/TRACER Europe BV, Groningen, The Netherlands
| | - W Szymanski
- Department of Radiology, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - H H Boersma
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands.,Department of Clinical Pharmacy and Pharmacology, University of Groningen, University Medical Centre of Groningen, Groningen, The Netherlands
| | - S Kruijff
- Department of Surgery, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands. .,Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands.
| |
Collapse
|
12
|
Slart RHJA, Tsoumpas C, Glaudemans AWJM, Noordzij W, Willemsen ATM, Borra RJH, Dierckx RAJO, Lammertsma AA. Long axial field of view PET scanners: a road map to implementation and new possibilities. Eur J Nucl Med Mol Imaging 2021; 48:4236-4245. [PMID: 34136956 PMCID: PMC8566640 DOI: 10.1007/s00259-021-05461-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 06/09/2021] [Indexed: 02/01/2023]
Abstract
In this contribution, several opportunities and challenges for long axial field of view (LAFOV) PET are described. It is an anthology in which the main issues have been highlighted. A consolidated overview of the camera system implementation, business and financial plan, opportunities and challenges is provided. What the nuclear medicine and molecular imaging community can expect from these new PET/CT scanners is the delivery of more comprehensive information to the clinicians for advancing diagnosis, therapy evaluation and clinical research.
Collapse
Affiliation(s)
- Riemer H J A Slart
- Medical Imaging Center, Department of Nuclear Medicine and Molecular, University of Groningen, University Medical Center Groningen, Hanzeplein 1, PO 9700 RB, Groningen, The Netherlands. .,Department of Biomedical Photonic Imaging, Faculty of Science and Technology, University of Twente, Enschede, The Netherlands.
| | - Charalampos Tsoumpas
- Medical Imaging Center, Department of Nuclear Medicine and Molecular, University of Groningen, University Medical Center Groningen, Hanzeplein 1, PO 9700 RB, Groningen, The Netherlands.,Leeds Institute of Cardiovascular and Metabolic Medicine, School of Medicine, University of Leeds, Leeds, UK
| | - Andor W J M Glaudemans
- Medical Imaging Center, Department of Nuclear Medicine and Molecular, University of Groningen, University Medical Center Groningen, Hanzeplein 1, PO 9700 RB, Groningen, The Netherlands
| | - Walter Noordzij
- Medical Imaging Center, Department of Nuclear Medicine and Molecular, University of Groningen, University Medical Center Groningen, Hanzeplein 1, PO 9700 RB, Groningen, The Netherlands
| | - Antoon T M Willemsen
- Medical Imaging Center, Department of Nuclear Medicine and Molecular, University of Groningen, University Medical Center Groningen, Hanzeplein 1, PO 9700 RB, Groningen, The Netherlands
| | - Ronald J H Borra
- Medical Imaging Center, Department of Nuclear Medicine and Molecular, University of Groningen, University Medical Center Groningen, Hanzeplein 1, PO 9700 RB, Groningen, The Netherlands
| | - Rudi A J O Dierckx
- Medical Imaging Center, Department of Nuclear Medicine and Molecular, University of Groningen, University Medical Center Groningen, Hanzeplein 1, PO 9700 RB, Groningen, The Netherlands
| | - Adriaan A Lammertsma
- Medical Imaging Center, Department of Nuclear Medicine and Molecular, University of Groningen, University Medical Center Groningen, Hanzeplein 1, PO 9700 RB, Groningen, The Netherlands
| |
Collapse
|
13
|
Kolinger GD, Vállez García D, Willemsen ATM, Reesink FE, de Jong BM, Dierckx RAJO, De Deyn PP, Boellaard R. Amyloid burden quantification depends on PET and MR image processing methodology. PLoS One 2021; 16:e0248122. [PMID: 33667281 PMCID: PMC7935288 DOI: 10.1371/journal.pone.0248122] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 02/19/2021] [Indexed: 11/19/2022] Open
Abstract
Quantification of amyloid load with positron emission tomography can be useful to assess Alzheimer's Disease in-vivo. However, quantification can be affected by the image processing methodology applied. This study's goal was to address how amyloid quantification is influenced by different semi-automatic image processing pipelines. Images were analysed in their Native Space and Standard Space; non-rigid spatial transformation methods based on maximum a posteriori approaches and tissue probability maps (TPM) for regularisation were explored. Furthermore, grey matter tissue segmentations were defined before and after spatial normalisation, and also using a population-based template. Five quantification metrics were analysed: two intensity-based, two volumetric-based, and one multi-parametric feature. Intensity-related metrics were not substantially affected by spatial normalisation and did not significantly depend on the grey matter segmentation method, with an impact similar to that expected from test-retest studies (≤10%). Yet, volumetric and multi-parametric features were sensitive to the image processing methodology, with an overall variability up to 45%. Therefore, the analysis should be carried out in Native Space avoiding non-rigid spatial transformations. For analyses in Standard Space, spatial normalisation regularised by TPM is preferred. Volumetric-based measurements should be done in Native Space, while intensity-based metrics are more robust against differences in image processing pipelines.
Collapse
Affiliation(s)
- Guilherme D. Kolinger
- Medical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - David Vállez García
- Medical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Antoon T. M. Willemsen
- Medical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Fransje E. Reesink
- Department of Neurology, Alzheimer Research Centre, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Bauke M. de Jong
- Department of Neurology, Alzheimer Research Centre, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Rudi A. J. O. Dierckx
- Medical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Peter P. De Deyn
- Department of Neurology, Alzheimer Research Centre, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- Laboratory of Neurochemistry and Behaviour, Institute Born-Bunge, University of Antwerp, Antwerp, Belgium
| | - Ronald Boellaard
- Medical Imaging Center, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
- Department of Radiology and Nuclear Medicine, Amsterdam University Medical Center, VU Medical Center, Amsterdam, The Netherlands
| |
Collapse
|
14
|
Schildt A, de Vries EFJ, Willemsen ATM, Moraga-Amaro R, Lima-Giacobbo B, Sijbesma JWA, Sossi V, Dierckx RAJO, Doorduin J. Modeling of [ 18F]FEOBV Pharmacokinetics in Rat Brain. Mol Imaging Biol 2020; 22:931-939. [PMID: 31907846 DOI: 10.1007/s11307-019-01466-8] [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] [Indexed: 11/26/2022]
Abstract
PURPOSE [18F]Fluoroethoxybenzovesamicol ([18F]FEOBV) is a radioligand for the vesicular acetylcholine transporter (VAChT), a marker of the cholinergic system. We evaluated the quantification of [18F]FEOBV in rats in control conditions and after partial saturation of VAChT using plasma and reference tissue input models and test-retest reliability. PROCEDURE Ninety-minute dynamic [18F]FEOBV PET scans with arterial blood sampling were performed in control rats and rats pretreated with 10 μg/kg FEOBV. Kinetic analyses were performed using one- (1TCM) and two-tissue compartmental models (2TCM), Logan and Patlak graphical analyses with metabolite-corrected plasma input, reference tissue Patlak with cerebellum as reference tissue, standard uptake value (SUV) and SUV ratio (SUVR) using 60- or 90-min acquisition. To assess test-retest reliability, two dynamic [18F]FEOBV scans were performed 1 week apart. RESULTS The 1TCM did not fit the data. Time-activity curves were more reliably estimated by the irreversible than the reversible 2TCM for 60 and 90 min as the influx rate Ki showed a lower coefficient of variation (COV, 14-24 %) than the volume of distribution VT (16-108 %). Patlak graphical analysis showed a good fit to the data for both acquisition times with a COV (12-27 %) comparable to the irreversible 2TCM. For 60 min, Logan analysis performed comparably to both irreversible models (COV 14-32 %) but showed lower sensitivity to VAChT saturation. Partial saturation of VAChT did not affect model selection when using plasma input. However, poor correlations were found between irreversible 2TCM and SUV and SUVR in partially saturated VAChT states. Test-retest reliability and intraclass correlation for SUV were good. CONCLUSION [18F]FEOBV is best modeled using the irreversible 2TCM or Patlak graphical analysis. SUV should only be used if blood sampling is not possible.
Collapse
Affiliation(s)
- Anna Schildt
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, P.O Box 30.001, Groningen, 9700RB, The Netherlands
- Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada
| | - Erik F J de Vries
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, P.O Box 30.001, Groningen, 9700RB, The Netherlands
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, P.O Box 30.001, Groningen, 9700RB, The Netherlands
| | - Rodrigo Moraga-Amaro
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, P.O Box 30.001, Groningen, 9700RB, The Netherlands
| | - Bruno Lima-Giacobbo
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, P.O Box 30.001, Groningen, 9700RB, The Netherlands
| | - Jürgen W A Sijbesma
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, P.O Box 30.001, Groningen, 9700RB, The Netherlands
| | - Vesna Sossi
- Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, P.O Box 30.001, Groningen, 9700RB, The Netherlands
| | - Janine Doorduin
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, P.O Box 30.001, Groningen, 9700RB, The Netherlands.
| |
Collapse
|
15
|
Schildt A, de Vries EFJ, Willemsen ATM, Giacobbo BL, Moraga-Amaro R, Sijbesma JWA, van Waarde A, Sossi V, Dierckx RAJO, Doorduin J. Effect of Dopamine D 2 Receptor Antagonists on [ 18F]-FEOBV Binding. Mol Pharm 2020; 17:865-872. [PMID: 32011892 PMCID: PMC7054895 DOI: 10.1021/acs.molpharmaceut.9b01129] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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] [Indexed: 11/29/2022]
Abstract
![]()
The
interaction of dopaminergic and cholinergic neurotransmission
in, e.g., Parkinson’s disease has been well established. Here,
D2 receptor antagonists were used to assess changes in
[18F]-FEOBV binding to the vesicular acetylcholine transporter
(VAChT) in rodents using positron emission tomography (PET). After
pretreatment with either 10 mg/kg haloperidol, 1 mg/kg raclopride,
or vehicle, 90 min dynamic PET scans were performed with arterial
blood sampling. The net influx rate (Ki) was obtained from Patlak graphical analysis, using a metabolite-corrected
plasma input function and dynamic PET data. [18F]-FEOBV
concentration in whole-blood or plasma and the metabolite-corrected
plasma input function were not significantly changed by the pretreatments
(adjusted p > 0.07, Cohen’s d 0.28–1.89) while the area-under-the-curve (AUC) of the parent
fraction of [18F]-FEOBV was significantly higher after
haloperidol treatment (adjusted p = 0.022, Cohen’s d = 2.51) than in controls. Compared to controls, the AUC
of [18F]-FEOBV, normalized for injected dose and body weight,
was nonsignificantly increased in the striatum after haloperidol (adjusted p = 0.4, Cohen’s d = 1.77) and raclopride
(adjusted p = 0.052, Cohen’s d = 1.49) treatment, respectively. No changes in the AUC of [18F]-FEOBV were found in the cerebellum (Cohen’s d 0.63–0.74). Raclopride treatment nonsignificantly
increased Ki in the striatum 1.3-fold
compared to control rats (adjusted p = 0.1, Cohen’s d = 1.1) while it reduced Ki in the cerebellum by 28% (adjusted p = 0.0004,
Cohen’s d = 2.2) compared to control rats.
Pretreatment with haloperidol led to a nonsignificant reduction in Ki in the striatum (10%, adjusted p = 1, Cohen’s d = 0.44) and a 40–50%
lower Ki than controls in all other brain
regions (adjusted p < 0.0005, Cohen’s d = 3.3–4.7). The changes in Ki induced by the selective D2 receptor antagonist
raclopride can in part be quantified using [18F]-FEOBV
PET imaging. Haloperidol, a nonselective D2/σ receptor
antagonist, either paradoxically decreased cholinergic activity or
blocked off-target [18F]-FEOBV binding to σ receptors.
Hence, further studies evaluating the binding of [18F]-FEOBV
to σ receptors using selective σ receptor ligands are
necessary.
Collapse
Affiliation(s)
- Anna Schildt
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, 9700RB, The Netherlands.,Department of Physics and Astronomy, University of British Columbia, 143-2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - Erik F J de Vries
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, 9700RB, The Netherlands
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, 9700RB, The Netherlands
| | - Bruno Lima Giacobbo
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, 9700RB, The Netherlands
| | - Rodrigo Moraga-Amaro
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, 9700RB, The Netherlands
| | - Jürgen W A Sijbesma
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, 9700RB, The Netherlands
| | - Aren van Waarde
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, 9700RB, The Netherlands
| | - Vesna Sossi
- Department of Physics and Astronomy, University of British Columbia, 143-2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, 9700RB, The Netherlands
| | - Janine Doorduin
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, 9700RB, The Netherlands
| |
Collapse
|
16
|
Meles SK, Kok JG, De Jong BM, Renken RJ, de Vries JJ, Spikman JM, Ziengs AL, Willemsen ATM, van der Horn HJ, Leenders KL, Kremer HPH. The cerebral metabolic topography of spinocerebellar ataxia type 3. Neuroimage Clin 2018; 19:90-97. [PMID: 30035006 PMCID: PMC6051313 DOI: 10.1016/j.nicl.2018.03.038] [Citation(s) in RCA: 14] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2017] [Revised: 02/23/2018] [Accepted: 03/28/2018] [Indexed: 12/11/2022]
Abstract
Introduction We aimed to uncover the pattern of network-level changes in neuronal function in Spinocerebellar ataxia type 3 (SCA3). Methods 17 genetically-confirmed SCA3 patients and 16 controls underwent structural MRI and static resting-state [18F]‑Fluoro‑deoxyglucose Positron Emission Tomography (FDG-PET) imaging. A SCA3-related pattern (SCA3-RP) was identified using a multivariate method (scaled subprofile model and principal component analysis (SSM PCA)). Participants were evaluated with the Scale for Assessment and Rating of Ataxia (SARA) and with neuropsychological examination including tests for language, executive dysfunction, memory, and information processing speed. The relationships between SCA3-RP expression and clinical scores were explored. Voxel based morphology (VBM) was applied on MRI-T1 images to assess possible correlations between FDG reduction and grey matter atrophy. Results The SCA3-RP disclosed relative hypometabolism of the cerebellum, caudate nucleus and posterior parietal cortex, and relatively increased metabolism in somatosensory areas and the limbic system. This topography, which was not explained by regional atrophy, correlated significantly with ataxia (SARA) scores (ρ = 0.72; P = 0.001). SCA3 patients showed significant deficits in executive function and information processing speed, but only letter fluency correlated with SCA3-RP expression (ρ = 0.51; P = 0.04, uncorrected for multiple comparisons). Conclusion The SCA3 metabolic profile reflects network-level alterations which are primarily associated with the motor features of the disease. Striatum decreases additional to cerebellar hypometabolism underscores an intrinsic extrapyramidal involvement in SCA3. Cerebellar-posterior parietal hypometabolism together with anterior parietal (sensory) cortex hypermetabolism may reflect a shift from impaired feedforward to compensatory feedback processing in higher-order motor control. The demonstrated SCA3-RP provides basic insight in cerebral network changes in this disease. A metabolic cerebral pattern could be identified in FDG-PET data of SCA3 patients, which was not explained by regional atrophy. Striatum decreases in the SCA3-pattern reflect extrapyramidal involvement. The SCA3-pattern reflects changes in higher-order motor control.
Collapse
Affiliation(s)
- Sanne K Meles
- Department of Neurology, University of Groningen, University Medical Center Groningen, The Netherlands.
| | - Jelmer G Kok
- Department of Neurology, University of Groningen, University Medical Center Groningen, The Netherlands
| | - Bauke M De Jong
- Department of Neurology, University of Groningen, University Medical Center Groningen, The Netherlands
| | - Remco J Renken
- Neuroimaging Center, Department of Neuroscience, University of Groningen, University Medical Center Groningen, The Netherlands
| | - Jeroen J de Vries
- Department of Neurology, University of Groningen, University Medical Center Groningen, The Netherlands
| | - Jacoba M Spikman
- Department of Neuropsychology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Aaltje L Ziengs
- Department of Neuropsychology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, The Netherlands
| | - Harm J van der Horn
- Department of Neurology, University of Groningen, University Medical Center Groningen, The Netherlands
| | - Klaus L Leenders
- Department of Neurology, University of Groningen, University Medical Center Groningen, The Netherlands
| | - Hubertus P H Kremer
- Department of Neurology, University of Groningen, University Medical Center Groningen, The Netherlands
| |
Collapse
|
17
|
Polinder-Bos HA, García DV, Kuipers J, Elting JWJ, Aries MJH, Krijnen WP, Groen H, Willemsen ATM, van Laar PJ, Strijkert F, Luurtsema G, Slart RHJA, Westerhuis R, Gansevoort RT, Gaillard CAJM, Franssen CFM. Hemodialysis Induces an Acute Decline in Cerebral Blood Flow in Elderly Patients. J Am Soc Nephrol 2018; 29:1317-1325. [PMID: 29496888 DOI: 10.1681/asn.2017101088] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [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: 10/12/2017] [Accepted: 01/11/2018] [Indexed: 12/30/2022] Open
Abstract
The initiation of hemodialysis is associated with an accelerated decline of cognitive function and an increased incidence of cerebrovascular accidents and white matter lesions. Investigators have hypothesized that the repetitive circulatory stress of hemodialysis induces ischemic cerebral injury, but the mechanism is unclear. We studied the acute effect of conventional hemodialysis on cerebral blood flow (CBF), measured by [15O]H2O positron emission tomography-computed tomography (PET-CT). During a single hemodialysis session, three [15O]H2O PET-CT scans were performed: before, early after the start of, and at the end of hemodialysis. We used linear mixed models to study global and regional CBF change during hemodialysis. Twelve patients aged ≥65 years (five women, seven men), with a median dialysis vintage of 46 months, completed the study. Mean (±SD) arterial BP declined from 101±11 mm Hg before hemodialysis to 93±17 mm Hg at the end of hemodialysis. From before the start to the end of hemodialysis, global CBF declined significantly by 10%±15%, from a mean of 34.5 to 30.5 ml/100g per minute (difference, -4.1 ml/100 g per minute; 95% confidence interval, -7.3 to -0.9 ml/100 g per minute; P=0.03). CBF decline (20%) was symptomatic in one patient. Regional CBF declined in all volumes of interest, including the frontal, parietal, temporal, and occipital lobes; cerebellum; and thalamus. Higher tympanic temperature, ultrafiltration volume, ultrafiltration rate, and pH significantly associated with lower CBF. Thus, conventional hemodialysis induces a significant reduction in global and regional CBF in elderly patients. Repetitive intradialytic decreases in CBF may be one mechanism by which hemodialysis induces cerebral ischemic injury.
Collapse
Affiliation(s)
| | - David Vállez García
- Medical Imaging Center, Department of Nuclear Medicine and Molecular Imaging, and
| | | | | | - Marcel J H Aries
- Department of Intensive Care, Maastricht University Medical Center, Maastricht University, Maastricht, The Netherlands
| | - Wim P Krijnen
- Research Group Healthy Ageing, Allied Health Care and Nursing, Hanze University of Applied Sciences, Groningen, The Netherlands.,Johann Bernoulli Institute for Mathematics and Computer Science, University of Groningen, Groningen, The Netherlands; and
| | | | - Antoon T M Willemsen
- Medical Imaging Center, Department of Nuclear Medicine and Molecular Imaging, and
| | | | - Fijanne Strijkert
- Neuropsychology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Gert Luurtsema
- Medical Imaging Center, Department of Nuclear Medicine and Molecular Imaging, and
| | - Riemer H J A Slart
- Medical Imaging Center, Department of Nuclear Medicine and Molecular Imaging, and
| | | | | | - Carlo A J M Gaillard
- Division of Internal Medicine and Dermatology, Department of Nephrology, University Medical Center Utrecht, University of Utrecht, The Netherlands
| | | |
Collapse
|
18
|
van der Vos CS, Koopman D, Rijnsdorp S, Arends AJ, Boellaard R, van Dalen JA, Lubberink M, Willemsen ATM, Visser EP. Quantification, improvement, and harmonization of small lesion detection with state-of-the-art PET. Eur J Nucl Med Mol Imaging 2017; 44:4-16. [PMID: 28687866 PMCID: PMC5541089 DOI: 10.1007/s00259-017-3727-z] [Citation(s) in RCA: 129] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 05/09/2017] [Indexed: 01/09/2023]
Abstract
In recent years, there have been multiple advances in positron emission tomography/computed tomography (PET/CT) that improve cancer imaging. The present generation of PET/CT scanners introduces new hardware, software, and acquisition methods. This review describes these new developments, which include time-of-flight (TOF), point-spread-function (PSF), maximum-a-posteriori (MAP) based reconstruction, smaller voxels, respiratory gating, metal artefact reduction, and administration of quadratic weight-dependent 18F-fluorodeoxyglucose (FDG) activity. Also, hardware developments such as continuous bed motion (CBM), (digital) solid-state photodetectors and combined PET and magnetic resonance (MR) systems are explained. These novel techniques have a significant impact on cancer imaging, as they result in better image quality, improved small lesion detectability, and more accurate quantification of radiopharmaceutical uptake. This influences cancer diagnosis and staging, as well as therapy response monitoring and radiotherapy planning. Finally, the possible impact of these developments on the European Association of Nuclear Medicine (EANM) guidelines and EANM Research Ltd. (EARL) accreditation for FDG-PET/CT tumor imaging is discussed.
Collapse
Affiliation(s)
- Charlotte S van der Vos
- Department of Radiology and Nuclear Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands
- MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
| | - Daniëlle Koopman
- MIRA Institute for Biomedical Technology and Technical Medicine, University of Twente, Enschede, The Netherlands
- Department of Nuclear Medicine, Isala Hospital, Zwolle, The Netherlands
| | - Sjoerd Rijnsdorp
- Department of Medical Physics, Catharina Hospital, Eindhoven, The Netherlands
| | - Albert J Arends
- Department of Medical Physics, Catharina Hospital, Eindhoven, The Netherlands
| | - Ronald Boellaard
- Department of Nuclear Medicine & Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Jorn A van Dalen
- Department of Nuclear Medicine, Isala Hospital, Zwolle, The Netherlands
- Department of Medical Physics, Isala, Zwolle, The Netherlands
| | - Mark Lubberink
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
- Department of Medical Physics, Uppsala University Hospital, Uppsala, Sweden
| | - Antoon T M Willemsen
- Department of Nuclear Medicine & Molecular Imaging, University of Groningen, University Medical Centre Groningen, Groningen, The Netherlands
| | - Eric P Visser
- Department of Radiology and Nuclear Medicine, Radboud University Medical Centre, Nijmegen, The Netherlands.
| |
Collapse
|
19
|
Vállez García D, Doorduin J, Willemsen ATM, Dierckx RAJO, Otte A. Altered Regional Cerebral Blood Flow in Chronic Whiplash Associated Disorders. EBioMedicine 2016; 10:249-57. [PMID: 27444853 PMCID: PMC5006659 DOI: 10.1016/j.ebiom.2016.07.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 05/03/2016] [Revised: 07/06/2016] [Accepted: 07/07/2016] [Indexed: 01/02/2023] Open
Abstract
There is increasing evidence of central hyperexcitability in chronic whiplash-associated disorders (cWAD). However, little is known about how an apparently simple cervical spine injury can induce changes in cerebral processes. The present study was designed (1) to validate previous results showing alterations of regional cerebral blood flow (rCBF) in cWAD, (2) to test if central hyperexcitability reflects changes in rCBF upon non-painful stimulation of the neck, and (3) to verify our hypothesis that the missing link in understanding the underlying pathophysiology could be the close interaction between the neck and midbrain structures. For this purpose, alterations of rCBF were explored in a case-control study using H215O positron emission tomography, where each group was exposed to four different conditions, including rest and different levels of non-painful electrical stimulation of the neck. rCBF was found to be elevated in patients with cWAD in the posterior cingulate and precuneus, and decreased in the superior temporal, parahippocampal, and inferior frontal gyri, the thalamus and the insular cortex when compared with rCBF in healthy controls. No differences in rCBF were observed between different levels of electrical stimulation. The alterations in regions directly involved with pain perception and interoceptive processing indicate that cWAD symptoms might be the consequence of a mismatch during the integration of information in brain regions involved in pain processing. Differences of rCBF were explored by PET in cWAD patients and healthy volunteers exposed to four conditions. Changes in rCBF were observed in cWAD patients in regions involved in pain perception and interoceptive sensory information. These changes might be the consequence of a mismatch in the integration of interoceptive stimuli in pain processing regions.
In the past, published work on chronic whiplash-associated disorders (cWAD) has caused much confusion and discussion, yet functional imaging methods such as positron emission tomography (PET) have demonstrated a variety of different significant alterations in the perfusion or glucose utilization of the brain. The present study, using PET and the perfusion marker, H215O, is a step forward in whiplash research. It shows changes in perfusion in regions directly involved in pain perception and interoceptive sensory information, such as the insular cortex, precuneus, and posterior cingulate, indicating a mismatch in the integration of interoceptive information in pain processing brain regions.
Collapse
Affiliation(s)
- David Vállez García
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Huispostcode EB50, Postbus 30001, 9700 RB Groningen, The Netherlands.
| | - Janine Doorduin
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Huispostcode EB50, Postbus 30001, 9700 RB Groningen, The Netherlands.
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Huispostcode EB50, Postbus 30001, 9700 RB Groningen, The Netherlands.
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Huispostcode EB50, Postbus 30001, 9700 RB Groningen, The Netherlands.
| | - Andreas Otte
- Division of Biomedical Engineering, Department of Electrical Engineering and Information Technology, Offenburg University, D-77652 Offenburg, Germany.
| |
Collapse
|
20
|
Reinders AATS, Willemsen ATM, den Boer JA, Vos HPJ, Veltman DJ, Loewenstein RJ. Opposite brain emotion-regulation patterns in identity states of dissociative identity disorder: a PET study and neurobiological model. Psychiatry Res 2014; 223:236-43. [PMID: 24976633 DOI: 10.1016/j.pscychresns.2014.05.005] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/08/2013] [Revised: 04/27/2014] [Accepted: 05/13/2014] [Indexed: 11/19/2022]
Abstract
Imaging studies in posttraumatic stress disorder (PTSD) have shown differing neural network patterns between hypo-aroused/dissociative and hyper-aroused subtypes. Since dissociative identity disorder (DID) involves different emotional states, this study tests whether DID fits aspects of the differing brain-activation patterns in PTSD. While brain activation was monitored using positron emission tomography, DID individuals (n=11) and matched DID-simulating healthy controls (n=16) underwent an autobiographic script-driven imagery paradigm in a hypo-aroused and a hyper-aroused identity state. Results were consistent with those previously found in the two PTSD subtypes for the rostral/dorsal anterior cingulate, the prefrontal cortex, and the amygdala and insula, respectively. Furthermore, the dissociative identity state uniquely activated the posterior association areas and the parahippocampal gyri, whereas the hyper-aroused identity state uniquely activated the caudate nucleus. Therefore, we proposed an extended PTSD-based neurobiological model for emotion modulation in DID: the hypo-aroused identity state activates the prefrontal cortex, cingulate, posterior association areas and parahippocampal gyri, thereby overmodulating emotion regulation; the hyper-aroused identity state activates the amygdala and insula as well as the dorsal striatum, thereby undermodulating emotion regulation. This confirms the notion that DID is related to PTSD as hypo-aroused and hyper-arousal states in DID and PTSD are similar.
Collapse
Affiliation(s)
- Antje A T S Reinders
- Department of Psychosis Studies, Institute of Psychiatry, King׳s College London, United Kingdom; Department of Neuroscience, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - Antoon T M Willemsen
- Department of Nuclear Medicine & Molecular Imaging, University Medical Center Groningen, University of Groningen, The Netherlands
| | - Johan A den Boer
- Department of Nuclear Medicine & Molecular Imaging, University Medical Center Groningen, University of Groningen, The Netherlands
| | - Herry P J Vos
- Outpatient Department Addiction Clinic Groningen/Drenthe, The Netherlands
| | - Dick J Veltman
- Department of Psychiatry, VU University Medical Center, Amsterdam, The Netherlands
| | - Richard J Loewenstein
- Sheppard Pratt Health System, Department of Psychiatry, University of Maryland, Baltimore, MD, USA
| |
Collapse
|
21
|
Faria DDP, Copray S, Sijbesma JWA, Willemsen ATM, Buchpiguel CA, Dierckx RAJO, de Vries EFJ. PET imaging of focal demyelination and remyelination in a rat model of multiple sclerosis: comparison of [11C]MeDAS, [11C]CIC and [11C]PIB. Eur J Nucl Med Mol Imaging 2014; 41:995-1003. [PMID: 24499866 DOI: 10.1007/s00259-013-2682-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2013] [Accepted: 12/20/2013] [Indexed: 10/25/2022]
Abstract
PURPOSE In this study, we compared the ability of [(11)C]CIC, [(11)C]MeDAS and [(11)C]PIB to reveal temporal changes in myelin content in focal lesions in the lysolecithin rat model of multiple sclerosis. Pharmacokinetic modelling was performed to determine the best method to quantify tracer uptake. METHODS Sprague-Dawley rats were stereotactically injected with either 1 % lysolecithin or saline into the corpus callosum and striatum of the right brain hemisphere. Dynamic PET imaging with simultaneous arterial blood sampling was performed 7 days after saline injection (control group), 7 days after lysolecithin injection (demyelination group) and 4 weeks after lysolecithin injection (remyelination group). RESULTS The kinetics of [(11)C]CIC, [(11)C]MeDAS and [(11)C]PIB was best fitted by Logan graphical analysis, suggesting that tracer binding is reversible. Compartment modelling revealed that all tracers were fitted best with the reversible two-tissue compartment model. Tracer uptake and distribution volume in lesions were in agreement with myelin status. However, the slow kinetics and homogeneous brain uptake of [(11)C]CIC make this tracer less suitable for in vivo PET imaging. [(11)C]PIB showed good uptake in the white matter in the cerebrum, but [(11)C]PIB uptake in the cerebellum was low, despite high myelin density in this region. [(11)C]MeDAS distribution correlated well with myelin density in different brain regions. CONCLUSION This study showed that PET imaging of demyelination and remyelination processes in focal lesions is feasible. Our comparison of three myelin tracers showed that [(11)C]MeDAS has more favourable properties for quantitative PET imaging of demyelinated and remyelinated lesions throughout the CNS than [(11)C]CIC and [(11)C]PIB.
Collapse
Affiliation(s)
- Daniele de Paula Faria
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
22
|
Visser AKD, Ramakrishnan NK, Willemsen ATM, Di Gialleonardo V, de Vries EFJ, Kema IP, Dierckx RAJO, van Waarde A. [(11)C]5-HTP and microPET are not suitable for pharmacodynamic studies in the rodent brain. J Cereb Blood Flow Metab 2014; 34:118-25. [PMID: 24084697 PMCID: PMC3887351 DOI: 10.1038/jcbfm.2013.171] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 08/08/2013] [Accepted: 09/02/2013] [Indexed: 11/09/2022]
Abstract
The PET tracer [(11)C]5-hydroxytryptophan ([(11)C]5-HTP), which is converted to [(11)C]5-hydroxytryptamine ([(11)C]5-HT) by aromatic amino acid decarboxylase (AADC), is thought to measure 5-HT synthesis rates. But can we measure these synthesis rates by kinetic modeling of [(11)C]5-HTP in rat? Male rats were scanned with [(11)C]5-HTP (60 minutes) after different treatments. Scans included arterial blood sampling and metabolite analysis. 5-HT synthesis rates were calculated by a two-tissue compartment model (2TCM) with irreversible tracer trapping or Patlak analysis. Carbidopa (inhibitor peripheral AADC) dose-dependently increased [(11)C]5-HTP brain uptake, but did not influence 2TCM parameters. Therefore, 10 mg/kg carbidopa was applied in all subsequent study groups. These groups included treatment with NSD 1015 (general AADC inhibitor) or p-chlorophenylalanine (PCPA, inhibitor of tryptophan hydroxylase, TPH). In addition, the effect of a low-tryptophan (Trp) diet was investigated. NSD 1015 or Trp depletion did not affect any model parameters, but PCPA reduced [(11)C]5-HTP uptake, and the k3. This was unexpected as NSD 1015 directly inhibits the enzyme converting [(11)C]5-HTP to [(11)C]5-HT, suggesting that trapping of radioactivity does not distinguish between parent tracer and its metabolites. As different results have been acquired in monkeys and humans, [(11)C]5-HTP-PET may be suitable for measuring 5-HT synthesis in primates, but not in rodents.
Collapse
Affiliation(s)
- Anniek K D Visser
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Nisha K Ramakrishnan
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Antoon T M Willemsen
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Valentina Di Gialleonardo
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Erik F J de Vries
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Ido P Kema
- Laboratory Medicine, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Rudi A J O Dierckx
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Aren van Waarde
- Department of Nuclear Medicine and Molecular Imaging, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| |
Collapse
|
23
|
Bollineni VR, Kerner GSMA, Pruim J, Steenbakkers RJHM, Wiegman EM, Koole MJB, de Groot EH, Willemsen ATM, Luurtsema G, Widder J, Groen HJM, Langendijk JA. PET imaging of tumor hypoxia using 18F-fluoroazomycin arabinoside in stage III-IV non-small cell lung cancer patients. J Nucl Med 2013; 54:1175-80. [PMID: 23753185 DOI: 10.2967/jnumed.112.115014] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
UNLABELLED Tumor hypoxia hampers the efficacy of radiotherapy because of its increased resistance to ionizing radiation. The aim of the present study was to estimate the potential added clinical value of the specific hypoxia tracer (18)F-fluoroazomycin arabinoside ((18)F-FAZA) over commonly used (18)F-FDG in the treatment of advanced-stage non-small cell lung cancer (NSCLC). METHODS Eleven patients with stage III or stage IV NSCLC underwent (18)F-FDG and (18)F-FAZA PET before chemoradiotherapy. The maximum standardized uptake value (SUVmax) was used to depict (18)F-FDG uptake, and the tumor-to-background (T/B) ratio and tumor fractional hypoxic volume (FHV) were used to quantify hypoxia. The spatial correlation between (18)F-FDG and (18)F-FAZA uptake values was investigated using voxel-based analysis. Partial-volume correction was applied. RESULTS All 11 patients showed clear uptake of (18)F-FAZA in the primary tumor. However, different patterns of (18)F-FDG and (18)F-FAZA uptake distributions were observed and varied widely among different tumors. No significant correlation was observed between (18)F-FDG SUVmax and (18)F-FAZA T/B ratio (P = 0.055). The median FHV of 1.4 was 48.4% (range, 5.0-91.5). A significant positive correlation was found between the (18)F-FAZA T/B ratio and FHV of 1.4 (P < 0.001). There was no correlation between the lesion size and FHV or between the (18)F-FDG SUVmax and FHV. The pattern of tumoral (18)F-FDG uptake was rather homogeneous, whereas (18)F-FAZA uptake was more heterogeneous, suggesting that (18)F-FAZA identifies hypoxic areas within metabolically active areas of tumor. A significant correlation between (18)F-FDG SUVmax and lesion size (P = 0.002) was observed. CONCLUSION (18)F-FAZA PET imaging is able to detect heterogeneous distributions of hypoxic subvolumes out of homogeneous (18)F-FDG background in a clinical setting. Therefore, (18)F-FAZA might be considered a tool for guiding dose escalation to the hypoxic fraction of the tumor.
Collapse
Affiliation(s)
- Vikram R Bollineni
- Department of Radiation Oncology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Huynh HK, Willemsen ATM, Holstege G. Female orgasm but not male ejaculation activates the pituitary. A PET-neuro-imaging study. Neuroimage 2013; 76:178-82. [PMID: 23523775 DOI: 10.1016/j.neuroimage.2013.03.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Revised: 03/07/2013] [Accepted: 03/13/2013] [Indexed: 01/23/2023] Open
Abstract
The pituitary gland plays an important role in basic survival mechanisms by releasing fluctuating amounts of hormones into the bloodstream, depending on the circumstances the individual finds itself. However, despite these changes in pituitary hormonal production, neuroimaging studies have never been able to demonstrate changes in the activation level of the pituitary. The most apparent reason is the much higher blood flow rate in the pituitary than in the brain. However, the present PET-scanning study demonstrates for the first time that neuroimaging techniques can identify increased pituitary activity. In a study with 11 healthy women sexual orgasm compared to rest caused an increased blood supply to the pituitary. We assume that this increase signifies elevated pituitary activation in order to produce higher plasma concentrations of oxytocin and prolactin. These hormones induce vaginal and uterus movements, ovulation and enhancement of sperm and egg transport. No increased blood supply was observed comparing clitoral stimulation, orgasm attempt, and faked orgasm with rest. In a study with 11 healthy men comparing ejaculation with rest did not reveal increased pituitary activation, probably because ejaculation causes a much lower increase of oxytocin and prolactin plasma concentration than female orgasm.
Collapse
Affiliation(s)
- Hieu Kim Huynh
- Center for Uroneurology, University Medical Center Groningen, Hanzeplein 1 Groningen, 9713 GZ, The Netherlands
| | | | | |
Collapse
|
25
|
F. Antunes I, Haisma HJ, Elsinga PH, Di Gialleonardo V, Waarde AV, Willemsen ATM, Dierckx RA, de Vries EFJ. Induction of β-Glucuronidase Release by Cytostatic Agents in Small Tumors. Mol Pharm 2012; 9:3277-85. [DOI: 10.1021/mp300327w] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Inês F. Antunes
- Department of Nuclear Medicine
and Molecular Imaging, University Medical Center Groningen, University
of Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands
| | - Hidde J. Haisma
- Department of Pharmaceutical
Gene Modulation, University Center for Pharmacy, University of Groningen,
A. Deusinglaan 1, 9713 AV Groningen, The Netherlands
| | - Philip H. Elsinga
- Department of Nuclear Medicine
and Molecular Imaging, University Medical Center Groningen, University
of Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands
| | - Valentina Di Gialleonardo
- Department of Nuclear Medicine
and Molecular Imaging, University Medical Center Groningen, University
of Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands
| | - Aren van Waarde
- Department of Nuclear Medicine
and Molecular Imaging, University Medical Center Groningen, University
of Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands
| | - Antoon T. M. Willemsen
- Department of Nuclear Medicine
and Molecular Imaging, University Medical Center Groningen, University
of Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands
| | - Rudi A. Dierckx
- Department of Nuclear Medicine
and Molecular Imaging, University Medical Center Groningen, University
of Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands
| | - Erik F. J. de Vries
- Department of Nuclear Medicine
and Molecular Imaging, University Medical Center Groningen, University
of Groningen, PO Box 30.001, 9700 RB Groningen, The Netherlands
| |
Collapse
|
26
|
Di Gialleonardo V, Signore A, Willemsen ATM, Sijbesma JWA, Dierckx RAJO, de Vries EFJ. Pharmacokinetic modelling of N-(4-[(18)F]fluorobenzoyl)interleukin-2 binding to activated lymphocytes in an xenograft model of inflammation. Eur J Nucl Med Mol Imaging 2012; 39:1551-60. [PMID: 22777334 PMCID: PMC3458201 DOI: 10.1007/s00259-012-2176-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [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: 01/30/2012] [Accepted: 06/06/2012] [Indexed: 01/18/2023]
Abstract
Purpose N-(4-[18F]Fluorobenzoyl)interleukin-2 ([18F]FB-IL2) specifically binds to interleukin-2 receptors (IL-2R) and thus may be used to detect inflammation processes using positron emission tomography (PET). We now validated whether [18F]FB-IL2 can be used to quantify activated human peripheral blood mononuclear cells (hPBMC) in rats by pharmacokinetic modelling. Methods Eleven Wistar rats were subcutaneously inoculated in the shoulder with different amounts of phytohaemagglutinin (PHA) activated hPBMC 15 min before i.v. injection of [18F]FB-IL2. A 60-min dynamic PET scan was acquired and arterial blood sampling and metabolite analysis were performed. At the end of the scan, animals were terminated and the inflammatory lesion dissected. PET data were analysed using Logan and Patlak analysis as well as one-tissue and two-tissue compartment models. Model preferences according to the Akaike information criterion (AIC) and correlation between PET measurements and the number of CD25-positive cells were evaluated. Results A high correlation between ex vivo tracer uptake (standardized uptake value) in the xenograft and the number of inoculated CD25-positive cells was observed (R2 = 0.90). Plasma time-activity curves showed a rapid washout of the radiopharmaceutical from blood, while the time-activity curves of the inflammatory lesions showed slower washout. Time-activity curves could be fitted well by the Logan analysis method, indicating that the binding between [18F]FB-IL2 and CD25 is reversible. AIC indicated that data could be modelled best by a two-tissue reversible compartment model. A high correlation was observed between the binding potential and the number of CD25-positive cells (R2 = 0.876, p < 0.0001). Based on binding potential measured by PET, the limit of detection was about 160,000 CD25-positive cells per 200 μl lesion (95 % confidence). Conclusion [18F]FB-IL2 kinetics in this animal model of inflammation could be best described by a reversible two-tissue compartment model. The [18F]FB-IL2 binding potential is a suitable measure for accurate quantification of lymphocytic infiltration in pathological conditions with PET. Electronic supplementary material The online version of this article (doi:10.1007/s00259-012-2176-y) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Valentina Di Gialleonardo
- Department of Nuclear Medicine & Molecular Imaging, University Medical Center Groningen, Groningen, The Netherlands
| | | | | | | | | | | |
Collapse
|
27
|
Reinders AATS, Reinders AATS, Willemsen ATM, Vos HPJ, den Boer JA, Nijenhuis ERS. Fact or factitious? A psychobiological study of authentic and simulated dissociative identity states. PLoS One 2012; 7:e39279. [PMID: 22768068 PMCID: PMC3387157 DOI: 10.1371/journal.pone.0039279] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [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: 03/05/2012] [Accepted: 05/16/2012] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Dissociative identity disorder (DID) is a disputed psychiatric disorder. Research findings and clinical observations suggest that DID involves an authentic mental disorder related to factors such as traumatization and disrupted attachment. A competing view indicates that DID is due to fantasy proneness, suggestibility, suggestion, and role-playing. Here we examine whether dissociative identity state-dependent psychobiological features in DID can be induced in high or low fantasy prone individuals by instructed and motivated role-playing, and suggestion. METHODOLOGY/PRINCIPAL FINDINGS DID patients, high fantasy prone and low fantasy prone controls were studied in two different types of identity states (neutral and trauma-related) in an autobiographical memory script-driven (neutral or trauma-related) imagery paradigm. The controls were instructed to enact the two DID identity states. Twenty-nine subjects participated in the study: 11 patients with DID, 10 high fantasy prone DID simulating controls, and 8 low fantasy prone DID simulating controls. Autonomic and subjective reactions were obtained. Differences in psychophysiological and neural activation patterns were found between the DID patients and both high and low fantasy prone controls. That is, the identity states in DID were not convincingly enacted by DID simulating controls. Thus, important differences regarding regional cerebral bloodflow and psychophysiological responses for different types of identity states in patients with DID were upheld after controlling for DID simulation. CONCLUSIONS/SIGNIFICANCE The findings are at odds with the idea that differences among different types of dissociative identity states in DID can be explained by high fantasy proneness, motivated role-enactment, and suggestion. They indicate that DID does not have a sociocultural (e.g., iatrogenic) origin.
Collapse
Affiliation(s)
- A A T S Reinders
- King's College London, Institute of Psychiatry, Department of Psychosis Studies, London, United Kingdom.
| | | | | | | | | | | |
Collapse
|
28
|
Antunes IF, Haisma HJ, Elsinga PH, Sijbesma JWA, Waarde AV, Willemsen ATM, Dierckx RA, de Vries EFJ. In vivo evaluation of [18F]FEAnGA-Me: a PET tracer for imaging β-glucuronidase (β-GUS) activity in a tumor/inflammation rodent model. Nucl Med Biol 2012; 39:854-63. [PMID: 22445742 DOI: 10.1016/j.nucmedbio.2012.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2011] [Revised: 01/02/2012] [Accepted: 02/11/2012] [Indexed: 01/08/2023]
Abstract
INTRODUCTION The PET tracer, 1-O-(4-(2-fluoroethyl-carbamoyloxymethyl)-2-nitrophenyl)-O-β-d-glucopyronuronate ([(18)F]FEAnGA), was recently developed for PET imaging of extracellular β-glucuronidase (β-GUS). However, [(18)F]FEAnGA exhibited rapid renal clearance, which resulted in a relatively low tracer uptake in the tumor. To improve the pharmacokinetics of [(18)F]FEAnGA, we developed its more lipophilic methyl ester analog, [(18)F]FEAnGA-Me. METHODS [(18)F]FEAnGA-Me was obtained by alkylation of the O-protected glucuronide methyl ester precursor with [(18)F]-fluoroethylamine ([(18)F]FEA), followed by removal of the acetate protecting groups with NaOMe/MeOH. The PET tracer was evaluated by in vitro and in vivo studies. RESULTS [(18)F]FEAnGA-Me was obtained in 5%-10% overall radiochemical yield. It is 10-fold less hydrophilic than [(18)F]FEAnGA and it is stable in PBS and in the presence of β-GUS for 1 h. However, in the presence of esterase or plasma [(18)F]FEAnGA-Me is converted to [(18)F]FEAnGA, and subsequently converted to [(18)F]FEA by β-GUS. MicroPET studies in Wistar rats bearing a C6 glioma and a sterile inflammation showed similar uptake in tumors after injection of either [(18)F]FEAnGA-Me or [(18)F]FEAnGA. Both tracers had a rapid two-phase clearance of total plasma radioactivity with a half-life of 1 and 8 min. The [(18)F]FEAnGA fraction generated from [(18)F]FEAnGA-Me by in vivo hydrolysis had a circulation half-life of 1 and 11 min in plasma. Similar distribution volume in the viable part of the tumor was found after injection of either [(18)F]FEAnGA-Me or [(18)F]FEAnGA. CONCLUSION The imaging properties of [(18)F]FEAnGA-Me were not significantly better than those of [(18)F]FEAnGA. Therefore, other strategies should be applied in order to improve the kinetics of these tracers.
Collapse
Affiliation(s)
- Inês F Antunes
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | | | | | | | | | | | | | | |
Collapse
|
29
|
Antunes IF, Doorduin J, Haisma HJ, Elsinga PH, van Waarde A, Willemsen ATM, Dierckx RA, de Vries EFJ. 18F-FEAnGA for PET of β-glucuronidase activity in neuroinflammation. J Nucl Med 2012; 53:451-8. [PMID: 22323774 DOI: 10.2967/jnumed.111.096388] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
UNLABELLED Activation of microglia is a hallmark of inflammatory, infectious, and degenerative diseases of the central nervous system. Several studies have indicated that there is an increase in release of β-glucuronidase by activated microglia into the extracellular space at the site of neuroinflammation. β-glucuronidase is involved in the hydrolysis of glycosaminoglycans on the cell surface and the degradation of the extracellular matrix. Therefore, β-glucuronidase might be a biomarker for ongoing neurodegeneration induced by neuroinflammation. In this study, we investigated whether the PET tracer (18)F-FEAnGA was able to detect β-glucuronidase release during neuroinflammation in a rat model of herpes encephalitis. METHODS Male Wistar rats were intranasally inoculated with herpes simplex virus 1 (HSV-1) or phosphate-buffered saline as a control. (11)C-(R)-PK11195 and (18)F-FEAnGA small-animal PET scans were acquired for 60 min. Logan graphical analysis was used to calculate (18)F-FEAnGA distribution volumes (DV(Logan)) in various brain areas. RESULTS After administration of (18)F-FEAnGA, the area under the activity concentration-versus-time curve of the whole brain was 2 times higher in HSV-1-infected rats than in control rats. In addition, the DV(Logan) of (18)F-FEAnGA was most increased in the frontopolar cortex, frontal cortex, bulbus olfactorius, cerebral cortex, cerebellum, and brainstem of HSV-1-infected rats, when compared with control rats. The conversion of (18)F-FEAnGA to 4-hydroxy-3-nitrobenzyl alcohol was found to be 1.6 times higher in HSV-1-infected rats than in control rats and correlated with the DV(Logan) of (18)F-FEAnGA in the same areas of the brain. Furthermore, the DV(Logan) of (18)F-FEAnGA also correlated with β-glucuronidase activity in the same brain regions. In addition, DV(Logan) of (18)F-FEAnGA showed a tendency to correlate with (11)C-(R)-PK11195 uptake (marker for activated microglia) in the same brain regions. CONCLUSION Despite relatively low brain uptake, (18)F-FEAnGA was able to detect an increased release of β-glucuronidase during neuroinflammation.
Collapse
Affiliation(s)
- Inês F Antunes
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, Groningen, The Netherlands
| | | | | | | | | | | | | | | |
Collapse
|
30
|
Antunes IF, Haisma HJ, Elsinga PH, van Waarde A, Willemsen ATM, Dierckx RA, de Vries EFJ. In vivo evaluation of 1-O-(4-(2-fluoroethyl-carbamoyloxymethyl)-2-nitrophenyl)-O-β-D-glucopyronuronate: a positron emission tomographic tracer for imaging β-glucuronidase activity in a tumor/inflammation rodent model. Mol Imaging 2012; 11:77-E1. [PMID: 22418030] [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: 05/31/2023] Open
Abstract
β-Glucuronidase (β-GUS) plays an important role in inflammation and degenerative processes. The enzyme has also been investigated as a target in prodrug therapy for cancer. To investigate the role of β-GUS in pathologies and to optimize β-GUS-based prodrug therapies, we recently developed a positron emission tomographic (PET) tracer, 1-O-(4-(2-fluoroethyl-carbamoyloxymethyl)-2-nitrophenyl)-O-β-D-glucopyronuronate ([18F]FEAnGA), which proved to be selectively cleaved by β-GUS. Here we present the in vivo evaluation of [18F]FEAnGA for imaging of β-GUS in a tumor/inflammation model. Ex vivo biodistribution of [18F]FEAnGA was conducted in healthy rats. PET imaging and pharmacokinetic modeling were performed in Wistar rats bearing C6 tumors of different sizes and sterile inflammation. The biodistribution studies of [18F]FEAnGA indicated low uptake in major organs and rapid excretion through the renal pathway. MicroPET studies revealed three times higher uptake in the viable part of larger C6 gliomas than in smaller C6 gliomas. Uptake in inflamed muscle was significantly higher than in control muscle. The distribution volume of [18F]FEAnGA in the viable part of the tumor correlated well with the cleavage of the tracer to [18F]fluoroethylamine and the spacer 4-hydroxy-3-nitrobenzyl alcohol. [18F]FEAnGA is a PET tracer able to detect increased activity of β-GUS in large solid tumors and in inflamed tissues.
Collapse
Affiliation(s)
- Inês F Antunes
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | | | | | | | | | | | | |
Collapse
|
31
|
Teune LK, Bartels AL, de Jong BM, Willemsen ATM, Eshuis SA, de Vries JJ, van Oostrom JCH, Leenders KL. Typical cerebral metabolic patterns in neurodegenerative brain diseases. Mov Disord 2011; 25:2395-404. [PMID: 20669302 DOI: 10.1002/mds.23291] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The differential diagnosis of neurodegenerative brain diseases on clinical grounds is difficult, especially at an early disease stage. Several studies have found specific regional differences of brain metabolism applying [(18)F]-fluoro-deoxyglucose positron emission tomography (FDG-PET), suggesting that this method can assist in early differential diagnosis of neurodegenerative brain diseases.We have studied patients who had an FDG-PET scan on clinical grounds at an early disease stage and included those with a retrospectively confirmed diagnosis according to strictly defined clinical research criteria. Ninety-six patients could be included of which 20 patients with Parkinson's disease (PD), 21 multiple system atrophy (MSA), 17 progressive supranuclear palsy (PSP), 10 corticobasal degeneration (CBD), 6 dementia with Lewy bodies (DLB), 15 Alzheimer's disease (AD), and 7 frontotemporal dementia (FTD). FDG PET images of each patient group were analyzed and compared to18 healthy controls using Statistical Parametric Mapping (SPM5).Disease-specific patterns of relatively decreased metabolic activity were found in PD (contralateral parietooccipital and frontal regions), MSA (bilateral putamen and cerebellar hemispheres), PSP (prefrontal cortex and caudate nucleus, thalamus, and mesencephalon), CBD (contralateral cortical regions), DLB (occipital and parietotemporal regions), AD (parietotemporal regions), and FTD (frontotemporal regions).The integrated method addressing a spectrum of various neurodegenerative brain diseases provided means to discriminate patient groups also at early disease stages. Clinical follow-up enabled appropriate patient inclusion. This implies that an early diagnosis in individual patients can be made by comparing each subject's metabolic findings with a complete database of specific disease related patterns.
Collapse
Affiliation(s)
- Laura K Teune
- Department of Neurology, University Medical Center Groningen, Groningen, The Netherlands.
| | | | | | | | | | | | | | | |
Collapse
|
32
|
de Klerk OL, Willemsen ATM, Bosker FJ, Bartels AL, Hendrikse NH, den Boer JA, Dierckx RA. Regional increase in P-glycoprotein function in the blood-brain barrier of patients with chronic schizophrenia: a PET study with [(11)C]verapamil as a probe for P-glycoprotein function. Psychiatry Res 2010; 183:151-6. [PMID: 20620031 DOI: 10.1016/j.pscychresns.2010.05.002] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2009] [Revised: 02/07/2010] [Accepted: 05/06/2010] [Indexed: 01/15/2023]
Abstract
P-glycoprotein (P-gp), a major efflux pump in the blood-brain barrier (BBB) has a profound effect on entry of drugs, peptides and other substances into the central nervous system (CNS). The brain's permeability can be negatively influenced by modulation of the transport function of P-gp. Inflammatory mediators play a role in schizophrenia, and may be able to influence the integrity of the BBB, via P-gp modulation. We hypothesized that P-gp function in the BBB is changed in patients with schizophrenia. Positron-emission tomography was used to measure brain uptake of [(11)C]verapamil, which is normally extruded from the brain by P-gp. We found that patients with chronic schizophrenia under treatment with antipsychotic drugs compared with healthy controls showed a significant decrease in [(11)C]verapamil uptake in the temporal cortex, the basal ganglia, and the amygdala, and amygdalae, and a trend towards a significant decrease was seen throughout the brain. The decrease of [(11)C]verapamil uptake correlates with an increased activity of the P-gp pump. Increased P-gp activity may be a factor in drug resistance in schizophrenia, induced by the use of antipsychotic agents.
Collapse
Affiliation(s)
- Onno L de Klerk
- Department of Psychiatry, University Medical Center Groningen (UMCG), P.O. Box 30.001, 9700 RB Groningen, The Netherlands.
| | | | | | | | | | | | | |
Collapse
|
33
|
de Klerk OL, Bosker FJ, Willemsen ATM, Van Waarde A, Visser AKD, de Jager T, Dagyte G, den Boer JA, Dierckx RA, Meerlo P. Chronic stress and antidepressant treatment have opposite effects on P-glycoprotein at the blood-brain barrier: an experimental PET study in rats. J Psychopharmacol 2010; 24:1237-42. [PMID: 19942635 DOI: 10.1177/0269881109349840] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The multi-drug efflux transporter P-glycoprotein is expressed in high concentrations at the blood-brain barrier and has a major function in the transport of drugs. In a recent PET-study evidence was found for an increased function of P-glycoprotein at the blood-brain barrier in medicated patients suffering from major depressive disorder. We used small-animal PET and [(11)C]-verapamil to study P-glycoprotein function at the blood-brain barrier of rats, either being administered as venlafaxine, an antidepressant, or subjected to chronic stress, a factor contributing to the development of depression. In a first experiment, male Wistar rats underwent a three-week foot shock procedure as a model of human depression. In a second experiment, rats were chronically treated with the antidepressant venlafaxine (25 mg/kg/d via an implanted osmotic minipump). In both experiments, a [(11)C]-verapamil PET scan was performed. In the chronically stressed rats, the distribution volume (V(T)) of [(11)C]-verapamil was significantly increased, whereas treatment with venlafaxine had the opposite effect and caused a significant reduction in V(T). The changes in V(T) could not be attributed to the influx rate constant (K(1)). Our data suggest that P-glycoprotein function at the blood-brain barrier is inhibited by chronic stress and increased by chronic administration of venlafaxine.
Collapse
Affiliation(s)
- Onno L de Klerk
- Department of Psychiatry, University Medical Center Groningen (UMCG), Groningen, The Netherlands.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Doorduin J, de Vries EFJ, Willemsen ATM, de Groot JC, Dierckx RA, Klein HC. Neuroinflammation in schizophrenia-related psychosis: a PET study. J Nucl Med 2009; 50:1801-7. [PMID: 19837763 DOI: 10.2967/jnumed.109.066647] [Citation(s) in RCA: 413] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
UNLABELLED Schizophrenia is a chronic and disabling brain disease characterized by psychotic episodes with unknown etiology. It is suggested that neuroinflammation plays a role in the pathophysiology of schizophrenia. Neuroinflammation is characterized by the activation of microglia cells, which show an increase in the expression of the peripheral benzodiazepine receptor. The isoquinoline (R)-N-(11)C-methyl-N-(1-methylpropyl)-1-(2-chlorophenyl)isoquinoline-3-carboxamide ((11)C-(R)-PK11195) is a peripheral benzodiazepine receptor ligand that can be used for the imaging of activated microglia cells, and thus neuroinflammation, with PET. We hypothesized that neuroinflammation would be more profound in schizophrenic patients during psychosis, and it was therefore investigated whether neuroinflammation was present in patients within the schizophrenia spectrum who were in a psychotic phase. METHODS Seven patients within the schizophrenia spectrum who were recovering from psychosis were included. Recovering psychosis was defined by a score of 5 or more on 1 item of the positive scale of the positive and negative symptoms scale (PANSS) or a score of 4 on 2 items. The patients were compared with 8 age-matched healthy volunteers. Dynamic 60-min PET scans were acquired after the injection of (11)C-(R)-PK11195. All subjects underwent T1- and T2-weighted MRI, and the scans were visually examined for abnormalities and used for anatomic coregistration in data analysis. The PET data were analyzed with a 2-tissue-compartment model to calculate the binding potential, using the metabolite-corrected plasma curve as input. RESULTS A significantly higher binding potential of (11)C-(R)-PK11195, indicative of neuroinflammation, was found in the hippocampus of schizophrenic patients than in healthy volunteers (2.07 +/- 0.42 vs. 1.37 +/- 0.30; P = 0.004). A nonsignificant 30% higher (11)C-(R)-PK11195 binding potential was found in the whole-brain gray matter of schizophrenic patients. The MR images did not reveal any visual abnormalities. CONCLUSION The present study suggests that focal neuroinflammation may play an important role in schizophrenia during psychosis.
Collapse
Affiliation(s)
- Janine Doorduin
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | | | | | | | | | | |
Collapse
|
35
|
Bartels AL, Willemsen ATM, Doorduin J, de Vries EFJ, Dierckx RA, Leenders KL. [11C]-PK11195 PET: quantification of neuroinflammation and a monitor of anti-inflammatory treatment in Parkinson's disease? Parkinsonism Relat Disord 2009; 16:57-9. [PMID: 19487152 DOI: 10.1016/j.parkreldis.2009.05.005] [Citation(s) in RCA: 127] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2009] [Revised: 04/21/2009] [Accepted: 05/06/2009] [Indexed: 01/03/2023]
Abstract
UNLABELLED [(11)C]-PK11195 PET has been used for in vivo brain imaging of microglia activation in Parkinson's disease (PD) patients. COX-2 inhibition has been shown to reduce neuroinflammation and neurodegeneration in animal models of PD. This pilot study assessed the use of [(11)C]-PK11195 PET to quantify neuroinflammation and evaluate the ability of COX-2 inhibition to reduce neuroinflammation in PD patients. METHODS Fourteen PD patients and eight healthy, age matched controls underwent a [(11)C]-PK11195 PET and MRI scan. Five PD patients were scanned before and after one month of celecoxib treatment 200 mg/day. Arterial plasma sampling and metabolite analysis were performed to create plasma input curves. A 2-compartment model and Logan analysis were applied and parametric DV images were compared using t-test in SPM2. In addition a simplified reference region model (SRTM) was applied, with both the cerebellum and a reference region derived from cluster analysis. RESULTS Using the cluster analysis, PD patients showed higher contralateral putamen BP and midbrain BP compared to controls, although considerable overlap was seen and differences were not statistically significant. Unexpectedly, BP and DV after celecoxib were slightly higher. Cerebellum as reference region resulted in lower BP values and k(3)/k(4) gave 10-fold higher BP values. Linearization of the data did not show differences between PD patients and controls. CONCLUSIONS In current practice, [(11)C]-PK11195 seems an unsuitable tracer for accurate or reliable quantification of neuroinflammation. Refinement of [(11)C]-PK11195 uptake analysis and, more importantly, further development of better tracers is necessary to enable accurate measurement of neuroinflammation and effects of anti-inflammatory treatment in patients.
Collapse
Affiliation(s)
- A L Bartels
- Department of Neurology, University Medical Centre Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | | | | | | | | | | |
Collapse
|
36
|
van Oostrom JCH, Dekker M, Willemsen ATM, de Jong BM, Roos RAC, Leenders KL. Changes in striatal dopamine D2 receptor binding in pre-clinical Huntington's disease. Eur J Neurol 2008; 16:226-31. [PMID: 19138335 DOI: 10.1111/j.1468-1331.2008.02390.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
BACKGROUND Carriers of the Huntington disease (HD) mutation develop a progressive neurodegenerative disorder after a pre-clinical phase. We examined the value of (11)C-raclopride PET (RAC) as a biomarker for pre-clinical HD pathophysiology. METHODS In a prospective cohort study with clinical and neuropsychological assessment we collected complete RAC data in 18 pre-clinical mutation carriers (HD-PMC) and 11 controls. Follow-up was 2 years. We calculated striatal RAC binding potential (BP) to measure dopamine D2 receptor availability. RESULTS No HD-PMC had overt neuropsychological dysfunction. RAC-BP in putamen was abnormal in up to 44% of HD-PMC. The rate of RAC-BP decline (2.6% per year) was not significantly higher than in controls. Follow-up putaminal BP correlated weakly with predicted distance to onset of clinical HD (P = 0.034), but the rate of decline did not. Three HD-PMC developed motor abnormalities suspect for HD but did not show an increased rate of decline of putaminal BP. CONCLUSIONS Many HD-PMC have striatal abnormalities but we found no clearly increased rate of D2 receptor changes around the onset of clinical HD. A longer follow-up of the present study cohort is needed to establish the value of RAC-BP in assessing the risk of clinical conversion from striatal D2 binding data.
Collapse
Affiliation(s)
- J C H van Oostrom
- Department of Neurology, University Medical Center Groningen, The University of Groningen, Groningen, The Netherlands.
| | | | | | | | | | | |
Collapse
|
37
|
Bartels AL, Willemsen ATM, Kortekaas R, de Jong BM, de Vries R, de Klerk O, van Oostrom JCH, Portman A, Leenders KL. Decreased blood-brain barrier P-glycoprotein function in the progression of Parkinson's disease, PSP and MSA. J Neural Transm (Vienna) 2008; 115:1001-9. [PMID: 18265929 PMCID: PMC2468317 DOI: 10.1007/s00702-008-0030-y] [Citation(s) in RCA: 164] [Impact Index Per Article: 10.3] [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] [Received: 11/22/2007] [Accepted: 01/25/2008] [Indexed: 11/16/2022]
Abstract
Decreased blood-brain barrier (BBB) efflux function of the P-glycoprotein (P-gp) transport system could facilitate the accumulation of toxic compounds in the brain, increasing the risk of neurodegenerative pathology such as Parkinson's disease (PD). This study investigated in vivo BBB P-gp function in patients with parkinsonian neurodegenerative syndromes, using [11C]-verapamil PET in PD, PSP and MSA patients. Regional differences in distribution volume were studied using SPM with higher uptake interpreted as reduced P-gp function. Advanced PD patients and PSP patients had increased [11C]-verapamil uptake in frontal white matter regions compared to controls; while de novo PD patients showed lower uptake in midbrain and frontal regions. PSP and MSA patients had increased uptake in the basal ganglia. Decreased BBB P-gp function seems a late event in neurodegenerative disorders, and could enhance continuous neurodegeneration. Lower [11C]-verapamil uptake in midbrain and frontal regions of de novo PD patients could indicate a regional up-regulation of P-gp function.
Collapse
Affiliation(s)
- A L Bartels
- Department of Neurology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands.
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Slart RHJA, Tio RA, Zeebregts CJ, Willemsen ATM, Dierckx RAJO, De Sutter J. Attenuation corrected gated SPECT for the assessment of left ventricular ejection fraction and volumes. Ann Nucl Med 2008; 22:171-6. [DOI: 10.1007/s12149-007-0100-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2007] [Accepted: 11/02/2007] [Indexed: 11/29/2022]
|
39
|
Ruytjens L, Georgiadis JR, Holstege G, Wit HP, Albers FWJ, Willemsen ATM. Functional sex differences in human primary auditory cortex. Eur J Nucl Med Mol Imaging 2007; 34:2073-81. [PMID: 17703299 PMCID: PMC2100432 DOI: 10.1007/s00259-007-0517-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [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: 02/28/2007] [Accepted: 06/22/2007] [Indexed: 11/25/2022]
Abstract
Background We used PET to study cortical activation during auditory stimulation and found sex differences in the human primary auditory cortex (PAC). Regional cerebral blood flow (rCBF) was measured in 10 male and 10 female volunteers while listening to sounds (music or white noise) and during a baseline (no auditory stimulation). Results and discussion We found a sex difference in activation of the left and right PAC when comparing music to noise. The PAC was more activated by music than by noise in both men and women. But this difference between the two stimuli was significantly higher in men than in women. To investigate whether this difference could be attributed to either music or noise, we compared both stimuli with the baseline and revealed that noise gave a significantly higher activation in the female PAC than in the male PAC. Moreover, the male group showed a deactivation in the right prefrontal cortex when comparing noise to the baseline, which was not present in the female group. Interestingly, the auditory and prefrontal regions are anatomically and functionally linked and the prefrontal cortex is known to be engaged in auditory tasks that involve sustained or selective auditory attention. Thus we hypothesize that differences in attention result in a different deactivation of the right prefrontal cortex, which in turn modulates the activation of the PAC and thus explains the sex differences found in the activation of the PAC. Conclusion Our results suggest that sex is an important factor in auditory brain studies.
Collapse
Affiliation(s)
- Liesbet Ruytjens
- Department of Otorhinolaryngology, University Medical Center Groningen, Groningen, The Netherlands.
| | | | | | | | | | | |
Collapse
|
40
|
Abstract
In the last few decades functional neuroimaging tools have emerged to study the function of the human brain in vivo. These techniques have increased the knowledge of how the brain processes stimuli of different sensory modalities, including auditory processing. Positron emission tomography (PET) has been used for nearly 20 years to study changes in cerebral blood flow associated with auditory stimulation in normal and hearing impaired subjects. PET studies gave insight into the neural base of processing basic sound features such as frequency and intensity, but complex stimuli such as speech and music have also been investigated extensively. Knowledge of the normal auditory function of the brain helps us to understand the neural base of hearing deficits and provides ideas for possible treatments. Although functional magnetic resonance imaging (fMRI) is replacing PET in many neuroimaging studies nowadays, PET still holds unique advantages and can give us valuable knowledge about the auditory cortex and auditory perception.
Collapse
Affiliation(s)
- L Ruytjens
- Department of Otorhinolaryngology, University Medical Center Utrecht, Utrecht, the Netherlands.
| | | | | | | | | |
Collapse
|
41
|
Reinders AATS, Nijenhuis ERS, Quak J, Korf J, Haaksma J, Paans AMJ, Willemsen ATM, den Boer JA. Psychobiological characteristics of dissociative identity disorder: a symptom provocation study. Biol Psychiatry 2006; 60:730-40. [PMID: 17008145 DOI: 10.1016/j.biopsych.2005.12.019] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2005] [Revised: 12/02/2005] [Accepted: 12/16/2005] [Indexed: 10/24/2022]
Abstract
BACKGROUND Dissociative identity disorder (DID) patients function as two or more identities or dissociative identity states (DIS), categorized as 'neutral identity states' (NIS) and 'traumatic identity states' (TIS). NIS inhibit access to traumatic memories thereby enabling daily life functioning. TIS have access and responses to these memories. We tested whether these DIS show different psychobiological reactions to trauma-related memory. METHODS A symptom provocation paradigm with 11 DID patients was used in a two-by-two factorial design setting. Both NIS and TIS were exposed to a neutral and a trauma-related memory script. Three psychobiological parameters were tested: subjective ratings (emotional and sensori-motor), cardiovascular responses (heart rate, blood pressure, heart rate variability) and regional cerebral blood flow as determined with H(2)(15)O positron emission tomography. RESULTS Psychobiological differences were found for the different DIS. Subjective and cardiovascular reactions revealed significant main and interactions effects. Regional cerebral blood flow data revealed different neural networks to be associated with different processing of the neutral and trauma-related memory script by NIS and TIS. CONCLUSIONS Patients with DID encompass at least two different DIS. These identities involve different subjective reactions, cardiovascular responses and cerebral activation patterns to a trauma-related memory script.
Collapse
Affiliation(s)
- A A T Simone Reinders
- Department of Biological Psychiatry, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Reinders AATS, Gläscher J, de Jong JR, Willemsen ATM, den Boer JA, Büchel C. Detecting fearful and neutral faces: BOLD latency differences in amygdala-hippocampal junction. Neuroimage 2006; 33:805-14. [PMID: 16952466 DOI: 10.1016/j.neuroimage.2006.06.052] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2005] [Revised: 06/26/2006] [Accepted: 06/28/2006] [Indexed: 11/22/2022] Open
Abstract
Evolutionary survival and procreation are augmented if an individual organism quickly detects environmental threats and rapidly initiates defensive behavioral reactions. Thus, facial emotions signaling a potential threat, e.g., fear or anger, should be perceived rapidly and automatically, possibly through a subcortical processing route which includes the amygdala. Using event-related functional magnetic resonance imaging (fMRI), we investigated the time course of the response in the amygdala to neutral and fearful faces, which appear from dynamically decreasing random visual noise. We aimed to detect differences of the amygdala response between fearful and neutral faces by estimating the latency of the blood oxygenation level-dependent (BOLD) response. We found that bilateral amygdala-hippocampal junction activation occurred earlier for fearful than for neutral faces. Our findings support the theory of a dual route architecture in which the subcortical thalamic-hippocampal-amygdala route serves fast preconscious threat perception.
Collapse
Affiliation(s)
- A A T S Reinders
- NeuroImage Nord, Institute for Systems Neuroscience, University Medical Center Hamburg Eppendorf, Germany.
| | | | | | | | | | | |
Collapse
|
43
|
Bart J, Dijkers ECF, Wegman TD, de Vries EGE, van der Graaf WTA, Groen HJM, Vaalburg W, Willemsen ATM, Hendrikse NH. New positron emission tomography tracer [(11)C]carvedilol reveals P-glycoprotein modulation kinetics. Br J Pharmacol 2005; 145:1045-51. [PMID: 15951832 PMCID: PMC1576233 DOI: 10.1038/sj.bjp.0706283] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Imaging of P-glycoprotein (P-gp) function in the blood-brain barrier (BBB) may support development of strategies, which will improve drug delivery to the brain. [(11)C]verapamil has been developed as a positron emission tomography (PET) tracer, to image P-gp function in vivo. Ideally, for the purpose of brain imaging, tracers should have a log P between 0.9 and 2.5. The beta-receptor antagonist carvedilol is a P-gp substrate with a log P=2.0, and can be labeled with [(11)C]. The aim of this study was to determine whether the P-gp substrate [(11)C]carvedilol can be used as a PET tracer for visualisation and quantification of the P-gp function in the BBB. Cellular [(11)C]carvedilol accumulation in GLC(4), GLC(4)/P-gp, and GLC(4)/Adr cells increased three-fold in the GLC(4)/P-gp cells after pretreatment with cyclosporin A (CsA) whereas no effect of MK571 could be determined in the GLC(4)/Adr cells. Ex vivo [(11)C]carvedilol biodistribution studies showed that [(11)C]carvedilol uptake in the brain was increased by CsA. [(11)C]carvedilol uptake in other organs was not affected by CsA. Autoradiography studies of rat brains showed that [(11)C]carvedilol was homogeneously distributed over the brain and that pretreatment with CsA increased [(11)C]carvedilol uptake. In vivo PET experiments were performed with and without P-gp modulation by CsA. P-gp mediated transport was quantified by Logan analysis of the PET data, calculating the distribution volume (DV) of [(11)C]carvedilol in the brain. Logan analysis resulted in excellent fits, revealing that [(11)C]carvedilol is not trapped in the brain. Brain DV of [(11)C]carvedilol showed a dose-dependent increase of maximal three-fold after CsA pretreatment. Above 15 mg kg(-1), no change in DV was found. Compared to [(11)C]verapamil less CsA was needed to reach maximal DV, suggesting that [(11)C]carvedilol kinetics is a more sensitive tool to in vivo measure P-gp function.
Collapse
Affiliation(s)
- Joost Bart
- PET-Center, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
- Department of Pulmonary Diseases, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Eli C F Dijkers
- PET-Center, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Theodora D Wegman
- PET-Center, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Elisabeth G E de Vries
- Medical Oncology, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Winette T A van der Graaf
- Medical Oncology, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Harry J M Groen
- Department of Pulmonary Diseases, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Willem Vaalburg
- PET-Center, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - Antoon T M Willemsen
- PET-Center, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
| | - N Harry Hendrikse
- PET-Center, University Medical Center Groningen, PO Box 30.001, 9700 RB Groningen, the Netherlands
- Author for correspondence:
| |
Collapse
|
44
|
Slart RHJA, Bax JJ, de Boer J, Willemsen ATM, Mook PH, Oudkerk M, van der Wall EE, van Veldhuisen DJ, Jager PL. Comparison of 99mTc-sestamibi/18FDG DISA SPECT with PET for the detection of viability in patients with coronary artery disease and left ventricular dysfunction. Eur J Nucl Med Mol Imaging 2005; 32:972-9. [PMID: 15824927 DOI: 10.1007/s00259-005-1785-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2004] [Accepted: 02/01/2005] [Indexed: 11/26/2022]
Abstract
PURPOSE Dual-isotope simultaneous acquisition (DISA) single-photon emission computed tomography (SPECT) is an attractive technique as it permits assessment of both myocardial glucose metabolism and perfusion within a single session, but few data on its accuracy for the assessment of viability are available as yet. In the present study, DISA SPECT was compared with positron emission tomography (PET) for the detection of myocardial viability in normal and dysfunctional left ventricular (LV) myocardium. METHODS Fifty-eight patients with chronic coronary artery disease and LV dysfunction (LV ejection fraction 33+/-12%) were studied. Patients underwent a 1-day dipyridamole stress 99mTc-sestamibi/18F-fluorodeoxyglucose (18FDG) DISA SPECT and 13N-ammonia/18FDG PET protocol. Within 1 week, resting MRI was performed to assess contractile function. Comparison of PET and SPECT data was performed using both visual and quantitative analysis. RESULTS The correlation of normalised activities of the flow tracers 99mTc-sestamibi and 13N-ammonia was good (r = 0.82; p < 0.001). The correlation between the two 18FDG studies was also good (r = 0.83; p < 0.001). The agreement for the assessment of viability for all segments between DISA SPECT and PET was 82%, with a kappa-statistic of 0.59 (95% CI 0.53-0.64), without a significant difference; in dysfunctional segments only, the agreement was 82%, with a kappa-statistic of 0.63 (95% CI 0.56-0.70), without a significant difference. When the DISA SPECT data were analysed visually, the agreement between DISA SPECT and PET was 83%, with a kappa-statistic of 0.58 (95% CI 0.52-0.63), without a significant difference. Moreover, there was no significant difference between visual and quantitative DISA SPECT analysis for the detection of viability. CONCLUSION This study shows an overall good agreement between 99mTc-sestamibi/18FDG DISA SPECT and PET for the assessment of myocardial viability in patients with severe LV dysfunction. Quantitative or visual analysis of the SPECT data did not influence the agreement with PET, suggesting that visual assessment may be sufficient for clinical purposes.
Collapse
Affiliation(s)
- Riemer H J A Slart
- Department of Nuclear Medicine and Molecular Imaging, Groningen University Medical Center, Hanzeplein 1, P.O. Box 30001, 9700 RB, Groningen, The Netherlands.
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Kortekaas R, Leenders KL, van Oostrom JCH, Vaalburg W, Bart J, Willemsen ATM, Hendrikse NH. Blood-brain barrier dysfunction in parkinsonian midbrain in vivo. Ann Neurol 2005; 57:176-9. [PMID: 15668963 DOI: 10.1002/ana.20369] [Citation(s) in RCA: 494] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Parkinson's disease (PD) is associated with a loss of neurons from the midbrain. The cause of PD is unknown, but it is established that certain neurotoxins can cause similar syndromes. The brain is normally protected from these noxious blood-borne chemicals by the blood-brain barrier which includes specialized proteins on the inside of blood vessels in the brain. These act as molecular efflux pumps and P-glycoprotein (P-gp) is an abundant representative. Vulnerability to PD appears codetermined by the genotype for the P-gp gene. We hypothesized that PD patients have reduced P-gp function in the blood-brain barrier. We used positron emission tomography to measure brain uptake of [(11)C]-verapamil, which is normally extruded from the brain by P-gp. Here, we show significantly elevated uptake of [(11)C]-verapamil (18%) in the midbrain of PD patients relative to controls. This is the first evidence supporting a dysfunctional blood-brain barrier as a causative mechanism in PD.
Collapse
Affiliation(s)
- Rudie Kortekaas
- Department of Neurology, Groningen University Hospital, Groningen, The Netherlands
| | | | | | | | | | | | | |
Collapse
|
46
|
de Jong RM, Willemsen ATM, Slart RHJA, Blanksma PK, van Waarde A, Cornel JH, Vaalburg W, van Veldhuisen DJ, Elsinga PH. Myocardial beta-adrenoceptor downregulation in idiopathic dilated cardiomyopathy measured in vivo with PET using the new radioligand (S)-[11C]CGP12388. Eur J Nucl Med Mol Imaging 2004; 32:443-7. [PMID: 15592928 DOI: 10.1007/s00259-004-1701-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2004] [Accepted: 09/09/2004] [Indexed: 01/08/2023]
Abstract
PURPOSE The beta-adrenoceptor (beta-AR) plays an important role in heart failure. Recently, the new tracer (S)-[11C]CGP12388 has been developed. It displays excellent properties for investigation of the cardiac beta-ARs in vivo with positron emission tomography (PET). Furthermore, the simple production method allows its use in a routine clinical setting. The aim of this study was to investigate whether decreased myocardial beta-AR density in patients with idiopathic dilated cardiomyopathy (IDC) can be estimated using (S)-[11C]CGP12388 PET. METHODS Myocardial beta-AR density was investigated in six patients with IDC and six age-matched healthy controls, using (S)-[11C]CGP12388 PET. RESULTS Beta-AR densities of 5.4+/-1.3 pmol/g (mean +/- SD) were observed in patients; these values were significantly lower than those observed in healthy controls (8.4+/-1.5 pmol/g, p<0.005). CONCLUSION This study indicates that PET with (S)-[11C]CGP12388 is applicable for the measurement of myocardial beta-AR density in patients. A highly significant reduction in beta-AR density was found in patients with IDC compared with healthy controls.
Collapse
Affiliation(s)
- Richard M de Jong
- Deparment of Cardiology, Groningen University Hospital, Groningen, The Netherlands
| | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Tio RA, Tan ES, Jessurun GAJ, Veeger N, Jager PL, Slart RHJA, de Jong RM, Pruim J, Hospers GAP, Willemsen ATM, de Jongste MJL, van Boven AJ, van Veldhuisen DJ, Zijlstra F. PET for evaluation of differential myocardial perfusion dynamics after VEGF gene therapy and laser therapy in end-stage coronary artery disease. J Nucl Med 2004; 45:1437-43. [PMID: 15347709] [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: 04/30/2023] Open
Abstract
UNLABELLED The purpose of this study was to appraise the value of PET in the assessment of the effect of supposedly proangiogenic new therapies such as gene therapy with vascular endothelial growth factor (VEGF) gene and endomyocardial laser therapy. METHODS Thirty-five patients with end-stage coronary artery disease and class III (Canadian Cardiovascular Society) angina were included. Myocardial ischemia was evaluated with dipyridamole PET scanning and exercise tolerance with bicycle ergometry. Ten patients were treated with naked plasmid DNA encoding for human VEGF165 (VEGF) and 12 patients were treated with laser therapy (direct myocardial revascularization [DMR]) using an electromechanical mapping system. Thirteen patients were treated with standard medical therapy (control). RESULTS In both active treatment groups, angina was reduced in most subjects, except in 2 VEGF and 5 DMR patients. In the control group, no improvement in anginal classification was found, except in 3 subjects. On the PET scan, solely in the VEGF group, the stress perfusion was significantly improved (from 57 +/- 33 to 81 +/- 55 mL/min/100 g; P = 0.031). Furthermore, in the VEGF group, the number of ischemic segments was reduced from 274 +/- 41 to 234 +/- 48 segments (P = 0.004) but not in the DMR group (from 209 +/- 43 to 215 +/- 52 segments) or in the control group (from 218 +/- 18 to 213 +/- 28 segments). Bicycle exercise duration showed slight nonsignificant changes in the VEGF group (from 3.6 +/- 2.0 to 4.6 +/- 2.1 min), in the DMR group (from 5.1 +/- 1.5 to 4.7 +/- 1.3 min), and in the control group (from 3.3 +/- 1.8 to 3.5 +/- 2.3 min). CONCLUSION PET showed that intramyocardial gene therapy with the human VEGF165 gene in contrast to laser DMR treatment effectively reduces myocardial ischemia.
Collapse
Affiliation(s)
- René A Tio
- Department of Cardiology, University Hospital Groningen, Groningen, The Netherlands.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Paans AMJ, Boerdijk SMM, Willemsen ATM, Pruim J. Source of impaired image quality in 3D whole-body FDG PET scanning. Eur J Nucl Med Mol Imaging 2004; 31:1207; author reply 1208. [PMID: 15197498 DOI: 10.1007/s00259-004-1545-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
49
|
Abstract
Having a sense of self is an explicit and high-level functional specialization of the human brain. The anatomical localization of self-awareness and the brain mechanisms involved in consciousness were investigated by functional neuroimaging different emotional mental states of core consciousness in patients with Multiple Personality Disorder (i.e., Dissociative Identity Disorder (DID)). We demonstrate specific changes in localized brain activity consistent with their ability to generate at least two distinct mental states of self-awareness, each with its own access to autobiographical trauma-related memory. Our findings reveal the existence of different regional cerebral blood flow patterns for different senses of self. We present evidence for the medial prefrontal cortex (MPFC) and the posterior associative cortices to have an integral role in conscious experience.
Collapse
Affiliation(s)
- A A T S Reinders
- Department of Biological Psychiatry, Groningen University Hospital, The Netherlands.
| | | | | | | | | | | |
Collapse
|
50
|
Slart RHJA, Bax JJ, de Jong RM, de Boer J, Lamb HJ, Mook PH, Willemsen ATM, Vaalburg W, van Veldhuisen DJ, Jager PL. Comparison of gated PET with MRI for evaluation of left ventricular function in patients with coronary artery disease. J Nucl Med 2004; 45:176-82. [PMID: 14960633] [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: 04/28/2023] Open
Abstract
UNLABELLED The aim of this study was to compare left ventricular (LV) volumes and regional wall motion determined by PET with those determined by the reference technique, cardiovascular MRI. METHODS LV end-diastolic volume (LVEDV), LV end-systolic volume (LVESV), and LV ejection fraction (LVEF) were measured and regional wall motion was scored in 38 patients with chronic coronary artery disease by both gated (18)F-FDG PET and MRI. A 9-segment model was used for PET and MRI to assess regional wall motion. RESULTS Good correlations were observed between MRI and gated PET for all parameters (r values ranging from 0.91 to 0.96). With PET, there was a significant but small underestimation of LVEDV and LVEF. Mean +/- SD LVEDV, LVESV, and LVEF for MRI were 131 +/- 57 mL, 91 +/- 12 mL, and 33% +/- 12%, respectively, and those for gated PET were 117 +/- 56 mL, 85 +/- 51 mL, and 30% +/- 11%, respectively. For regional wall motion, an agreement of 85% was found, with a kappa-statistic of 0.79 (95% confidence interval, 0.70-0.89; SE, 0.049). CONCLUSION LV volumes, LVEF, and regional wall motion can be assessed with gated (18)F-FDG PET and correlate well with these parameters assessed by MRI.
Collapse
Affiliation(s)
- Riemer H J A Slart
- Department of Nuclear Medicine, Groningen University Medical Center, Hanzeplein 1, PO Box 30001, 9700 RB Groningen, The Netherlands.
| | | | | | | | | | | | | | | | | | | |
Collapse
|