| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Clinical Investigations |
1 Department of Radiology, University of Washington, Seattle, Washington
2 Department of Pathology, University of Washington, Seattle, Washington
Assessing cellular proliferation provides a direct method to measure the in vivo growth of cancer. We evaluated the application of a model of 3'-deoxy-3'-18F-fluorothymidine (18F-FLT) kinetics described in a companion report to the analysis of FLT PET image data in lung cancer patients. Compartmental model analysis was performed to estimate the overall flux constants (KFLT) for FLT phosphorylation in tumor, bone marrow, and muscle. Estimates of flux were compared with an in vitro assay of proliferation (Ki-67) applied to tissue derived from surgical resection. Compartmental modeling results were compared with simple model-independent methods of estimating FLT uptake. Methods: Seventeen patients with 18 tumor sites underwent up to 2 h of dynamic PET with blood sampling. Metabolite analysis of plasma samples corrected the total blood activity for labeled metabolites and provided the FLT model input function. A 2-compartment, 4-parameter model (4P) was tested and compared with a 2-compartment, 3-parameter (3P) model for estimating KFLT. Results: Bone marrow, a proliferative normal tissue, had the highest values of KFLT, whereas muscle, a nonproliferating tissue, showed the lowest values. The KFLT for tumors estimated by compartmental analysis had a fair correlation with estimates by modified graphical analysis (r = 0.86) and a poorer correlation with the average standardized uptake value (r = 0.62) in tumor. Estimates of KFLT derived from 60 min of dynamic PET data using the 3P model underestimated KFLT compared with 90 or 120 min of dynamic data analyzed using the 4P model. Comparison of flux estimates with an independent measure of cellular proliferation showed that KFLT was highly correlated with Ki-67 (Spearman 
= 0.92, P < 0.001). Ignoring the metabolites of FLT in blood underestimated KFLT by as much as 47%. Conclusion: Compartmental analysis of FLT PET image data yielded robust estimates of KFLT that correlated with in vitro measures of tumor proliferation. This method can be applied generally to other imaging studies of different cancers after validation of parameter error. Tumor loss of phosphorylated FLT nucleotides (k4) is notable and leads to errors when FLT uptake is evaluated using model-independent approaches that ignore k4, such as graphical analysis or the SUV.
Key Words: 3'-deoxy-3'-fluorothymidine • kinetic modeling • thymidine kinase 1 • cell proliferation • Ki-67
Related articles in JNM:
This article has been cited by other articles:
|
|
 |
|
  Y. Menda, L. L. Boles Ponto, K. J. Dornfeld, T. J. Tewson, G. L. Watkins, M. K. Schultz, J. J. Sunderland, M. M. Graham, and J. M. Buatti Kinetic Analysis of 3'-Deoxy-3'-18F-Fluorothymidine (18F-FLT) in Head and Neck Cancer Patients Before and Early After Initiation of Chemoradiation Therapy J. Nucl. Med., July 1, 2009; 50(7): 1028 - 1035. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. P.S. Dunphy and J. S. Lewis Radiopharmaceuticals in Preclinical and Clinical Development for Monitoring of Therapy with PET J. Nucl. Med., May 1, 2009; 50(Suppl_1): 106S - 121S. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. Zhao, L. H. Schwartz, and S. M. Larson Imaging Surrogates of Tumor Response to Therapy: Anatomic and Functional Biomarkers J. Nucl. Med., February 1, 2009; 50(2): 239 - 249. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. J. Kim, J. S. Lee, K. C. Im, S.-Y. Kim, S.-A. Park, S. J. Lee, S. J. Oh, D. S. Lee, and D. H. Moon Kinetic Modeling of 3'-Deoxy-3'-18F-Fluorothymidine for Quantitative Cell Proliferation Imaging in Subcutaneous Tumor Models in Mice J. Nucl. Med., December 1, 2008; 49(12): 2057 - 2066. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 H.-J. Sohn, Y.-J. Yang, J.-S. Ryu, S. J. Oh, K. C. Im, D. H. Moon, D. H. Lee, C. Suh, J.-S. Lee, and S.-W. Kim [18F]Fluorothymidine Positron Emission Tomography before and 7 Days after Gefitinib Treatment Predicts Response in Patients with Advanced Adenocarcinoma of the Lung Clin. Cancer Res., November 15, 2008; 14(22): 7423 - 7429. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. R. Bading and A. F. Shields Imaging of Cell Proliferation: Status and Prospects J. Nucl. Med., June 1, 2008; 49(Suppl_2): 64S - 80S. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
R. Ullrich, H. Backes, H. Li, L. Kracht, H. Miletic, K. Kesper, B. Neumaier, W.-D. Heiss, K. Wienhard, and A. H. Jacobs Glioma Proliferation as Assessed by 3'-Fluoro-3'-Deoxy-L-Thymidine Positron Emission Tomography in Patients with Newly Diagnosed High-Grade Glioma Clin. Cancer Res., April 1, 2008; 14(7): 2049 - 2055. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. S. Bradbury, D. Hambardzumyan, P. B. Zanzonico, J. Schwartz, S. Cai, E. M. Burnazi, V. Longo, S. M. Larson, and E. C. Holland Dynamic Small-Animal PET Imaging of Tumor Proliferation with 3'-Deoxy-3'-18F-Fluorothymidine in a Genetically Engineered Mouse Model of High-Grade Gliomas J. Nucl. Med., March 1, 2008; 49(3): 422 - 429. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. G.C. Troost, W. V. Vogel, M. A.W. Merkx, P. J. Slootweg, H. A.M. Marres, W. J.M. Peeters, J. Bussink, A. J. van der Kogel, W. J.G. Oyen, and J. H.A.M. Kaanders 18F-FLT PET Does Not Discriminate Between Reactive and Metastatic Lymph Nodes in Primary Head and Neck Cancer Patients J. Nucl. Med., May 1, 2007; 48(5): 726 - 735. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Muzi, A. M. Spence, F. O'Sullivan, D. A. Mankoff, J. M. Wells, J. R. Grierson, J. M. Link, and K. A. Krohn Kinetic Analysis of 3'-Deoxy-3'-18F-Fluorothymidine in Patients with Gliomas J. Nucl. Med., October 1, 2006; 47(10): 1612 - 1621. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. Leyton, J. P. Alao, M. Da Costa, A. V. Stavropoulou, J. R. Latigo, M. Perumal, R. Pillai, Q. He, P. Atadja, E. W.-F. Lam, et al. In vivo Biological Activity of the Histone Deacetylase Inhibitor LAQ824 Is detectable with 3'-Deoxy-3'-[18F]Fluorothymidine Positron Emission Tomography. Cancer Res., August 1, 2006; 66(15): 7621 - 7629. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L.-F. de Geus-Oei, E. P. Visser, P. F.M. Krabbe, B. A. van Hoorn, E. B. Koenders, A. T. Willemsen, J. Pruim, F. H.M. Corstens, and W. J.G. Oyen Comparison of Image-Derived and Arterial Input Functions for Estimating the Rate of Glucose Metabolism in Therapy-Monitoring 18F-FDG PET Studies J. Nucl. Med., June 1, 2006; 47(6): 945 - 949. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
G. J. Kelloff, K. A. Krohn, S. M. Larson, R. Weissleder, D. A. Mankoff, J. M. Hoffman, J. M. Link, K. Z. Guyton, W. C. Eckelman, H. I. Scher, et al. The Progress and Promise of Molecular Imaging Probes in Oncologic Drug Development Clin. Cancer Res., November 15, 2005; 11(22): 7967 - 7985. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
L. M. Kenny, D. M. Vigushin, A. Al-Nahhas, S. Osman, S. K. Luthra, S. Shousha, R. C. Coombes, and E. O. Aboagye Quantification of Cellular Proliferation in Tumor and Normal Tissues of Patients with Breast Cancer by [18F]Fluorothymidine-Positron Emission Tomography Imaging: Evaluation of Analytical Methods Cancer Res., November 1, 2005; 65(21): 10104 - 10112. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 L. K. Shankar and D. C. Sullivan Functional Imaging in Lung Cancer J. Clin. Oncol., May 10, 2005; 23(14): 3203 - 3211. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
M. Muzi, D. A. Mankoff, J. R. Grierson, J. M. Wells, H. Vesselle, and K. A. Krohn Kinetic Modeling of 3'-Deoxy-3'-Fluorothymidine in Somatic Tumors: Mathematical Studies J. Nucl. Med., February 1, 2005; 46(2): 371 - 380. [Abstract] [Full Text] [PDF]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
| JOURNAL OF NUCLEAR MEDICINE TECHNOLOGY | THE JOURNAL OF NUCLEAR MEDICINE |
