Molecular Imaging最新文献_第10页

Image-Based Analysis of Tumor Localization After Intra-Arterial Delivery of Technetium-99m-Labeled SPIO Using SPECT/CT and MRI. 利用SPECT/CT和MRI对动脉内注入锝-99m标记SPIO后肿瘤定位的影像学分析。

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012116689001

In Joon Lee, Ji Yong Park, Young-Il Kim, Yun-Sang Lee, Jae Min Jeong, Jaeil Kim, Euishin Edmund Kim, Keon Wook Kang, Dong Soo Lee, Seonji Jeong, Eun Jeong Kim, Young Il Kim, Jin Wook Chung

{"title":"Image-Based Analysis of Tumor Localization After Intra-Arterial Delivery of Technetium-99m-Labeled SPIO Using SPECT/CT and MRI.","authors":"In Joon Lee, Ji Yong Park, Young-Il Kim, Yun-Sang Lee, Jae Min Jeong, Jaeil Kim, Euishin Edmund Kim, Keon Wook Kang, Dong Soo Lee, Seonji Jeong, Eun Jeong Kim, Young Il Kim, Jin Wook Chung","doi":"10.1177/1536012116689001","DOIUrl":"https://doi.org/10.1177/1536012116689001","url":null,"abstract":"The aim of this study is to evaluate the localization of 99mTc-labeled dextran-coated superparamagnetic iron oxide (SPIO) nanoparticles to the liver tumor using image-based analysis. We delivered 99mTc-SPIO intravenously or intra-arterially (IA) with/without Lipiodol to compare the tumor localization by gamma scintigraphy, single-photon emission computed tomography (SPECT), and magnetic resonance imaging (MRI) in a rabbit liver tumor. The gamma and SPECT image-based analysis shows that the uptake ratio of the tumor to the normal liver parenchyma is highest after delivery of 99mTc-SPIO with Lipiodol IA and that well correlates with the trend of the signal decrease in the liver MRIs. Intra-arterial delivery of SPIO with Lipiodol might be a good drug delivery system targeting the hepatic tumors, as confirmed by image-based analysis.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1536012116689001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35125049","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Whole-Body Biodistribution, Dosimetry, and Metabolite Correction of [¹¹C]Palmitate: A PET Tracer for Imaging of Fatty Acid Metabolism. [11C]棕榈酸酯的全身生物分布、剂量学和代谢物校正:脂肪酸代谢成像的PET示踪剂。

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012117734485

Nana L Christensen, Steen Jakobsen, Anna C Schacht, Ole L Munk, Aage K O Alstrup, Lars P Tolbod, Hendrik J Harms, Søren Nielsen, Lars C Gormsen

{"title":"Whole-Body Biodistribution, Dosimetry, and Metabolite Correction of [11C]Palmitate: A PET Tracer for Imaging of Fatty Acid Metabolism.","authors":"Nana L Christensen, Steen Jakobsen, Anna C Schacht, Ole L Munk, Aage K O Alstrup, Lars P Tolbod, Hendrik J Harms, Søren Nielsen, Lars C Gormsen","doi":"10.1177/1536012117734485","DOIUrl":"https://doi.org/10.1177/1536012117734485","url":null,"abstract":"Introduction: Despite the decades long use of [11C]palmitate positron emission tomography (PET)/computed tomography in basic metabolism studies, only personal communications regarding dosimetry and biodistribution data have been published.Methods: Dosimetry and biodistribution studies were performed in 2 pigs and 2 healthy volunteers by whole-body [11C]palmitate PET scans. Metabolite studies were performed in 40 participants (healthy and with type 2 diabetes) under basal and hyperinsulinemic conditions. Metabolites were estimated using 2 approaches and subsequently compared: Indirect [11C]CO2 release and parent [11C]palmitate measured by a solid-phase extraction (SPE) method. Finally, myocardial fatty acid uptake was calculated in a patient cohort using input functions derived from individual metabolite correction compared with population-based metabolite correction.Results: In humans, mean effective dose was 3.23 (0.02) µSv/MBq, with the liver and myocardium receiving the highest absorbed doses. Metabolite correction using only [11C]CO2 estimates underestimated the fraction of metabolites in studies lasting more than 20 minutes. Population-based metabolite correction showed excellent correlation with individual metabolite correction in the cardiac PET validation cohort.Conclusion: First, mean effective dose of [11C]palmitate is 3.23 (0.02) µSv/MBq in humans allowing multiple scans using ∼300 MBq [11C]palmitate, and secondly, population-based metabolite correction compares well with individual correction.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1536012117734485","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35491442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 20

Molecular Imaging and Radionuclide Therapy of Melanoma Targeting the Melanocortin 1 Receptor. 靶向黑色素皮质素1受体的黑色素瘤分子成像和放射性核素治疗。

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012117737919

Chengcheng Zhang, Kuo-Shyan Lin, François Bénard

{"title":"Molecular Imaging and Radionuclide Therapy of Melanoma Targeting the Melanocortin 1 Receptor.","authors":"Chengcheng Zhang, Kuo-Shyan Lin, François Bénard","doi":"10.1177/1536012117737919","DOIUrl":"https://doi.org/10.1177/1536012117737919","url":null,"abstract":"Melanoma is a deadly disease at late metastatic stage, and early diagnosis and accurate staging remain the key aspects for managing melanoma. The melanocortin 1 receptor (MC1 R) is overexpressed in primary and metastatic melanomas, and its endogenous ligand, the α-melanocyte-stimulating hormone (αMSH), has been extensively studied for the development of MC1 R-targeted molecular imaging and therapy of melanoma. Natural αMSH is not well suited for this purpose due to low stability in vivo. Unnatural amino acid substitutions substantially stabilized the peptide, while cyclization via lactam bridge and metal coordination further improved binding affinity and stability. In this study, we summarized the development and the in vitro and in vivo characteristics of the radiolabeled αMSH analogues, including 99mTc-, 111In-, 67 Ga-, or 125I-labeled αMSH analogues for imaging with single-photon emission computed tomography; 68Ga-, 64Cu-, or 18F-labeled αMSH analogues for imaging with positron emission tomography; and 188Re-, 177Lu-, 90Y-, or 212Pb-labeled αMSH analogues for radionuclide therapy. These radiolabeled αMSH analogues showed promising results with high tumor uptake and rapid normal tissue activity clearance in the preclinical model of B16F1 and B16F10 mouse melanomas. These results highlight the potential of using radiolabeled αMSH analogues in clinical applications for molecular imaging and radionuclide therapy of melanoma.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1536012117737919","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35647048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Triphenylamines Induce Cell Death Upon 2-Photon Excitation. 三苯胺在双光子激发下诱导细胞死亡。

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012117714164

Rahima Chennoufi, Florence Mahuteau-Betzer, Patrick Tauc, Marie-Paule Teulade-Fichou, Eric Deprez

{"title":"Triphenylamines Induce Cell Death Upon 2-Photon Excitation.","authors":"Rahima Chennoufi, Florence Mahuteau-Betzer, Patrick Tauc, Marie-Paule Teulade-Fichou, Eric Deprez","doi":"10.1177/1536012117714164","DOIUrl":"https://doi.org/10.1177/1536012117714164","url":null,"abstract":"Photodynamic therapy (PDT) is a promising therapeutic method for several diseases, in particular for cancer. This approach uses a photosensitizer, oxygen, and an external light source to produce reactive oxygen species (ROS) at lethal doses to induce cell death. One drawback of current PDT is the use of visible light which has poor penetration in tissues. Such a limitation could be overcome by the use of novel organic compounds compatible with photoactivation under near-infrared light excitation. Triphenylamines (TPAs) are highly fluorescent compounds that are efficient to induce cell death upon visible light excitation (458 nm), but outside the biological spectral window. Interestingly, we recently showed that TPAs target cytoplasmic organelles of living cells, mainly mitochondria, and induce a high ROS production upon 2-photon excitation (in the 760-860 nm range), leading to a fast apoptosis process. However, we observed significant differences among the tested TPA compounds in terms of cell distribution and time courses of cell death-related events (apoptosis vs necrosis). In summary, TPAs represent serious candidates as photosensitizers that are compatible with 2-photon excitation to simultaneously trigger and imaging cell death although the relationship between their subcellular localization and the cell death mechanism involved is still a matter of debate.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1536012117714164","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35099091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Brain Penetration of the ROS1/ALK Inhibitor Lorlatinib Confirmed by PET. PET证实ROS1/ALK抑制剂Lorlatinib的脑穿透性。

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012117736669

T Lee Collier, Kevin P Maresca, Marc D Normandin, Paul Richardson, Timothy J McCarthy, Steven H Liang, Rikki N Waterhouse, Neil Vasdev

{"title":"Brain Penetration of the ROS1/ALK Inhibitor Lorlatinib Confirmed by PET.","authors":"T Lee Collier, Kevin P Maresca, Marc D Normandin, Paul Richardson, Timothy J McCarthy, Steven H Liang, Rikki N Waterhouse, Neil Vasdev","doi":"10.1177/1536012117736669","DOIUrl":"https://doi.org/10.1177/1536012117736669","url":null,"abstract":"The Massachusetts General Hospital Radiochemistry Program, in collaboration with Pfizer, has developed unique 11C and 18F-labeling strategies to synthesize isotopologs of lorlatinib (PF-06463922) which is undergoing phase III clinical trial investigations for treatment of non-small-cell lung cancers with specific molecular alterations. A major goal in cancer therapeutics is to measure the concentrations of this drug in the brain metastases of patients with lung cancer, and penetration of the blood-brain barrier is important for optimal therapeutic outcomes. Our recent publication in Nature Communications employed radiolabeled lorlatinib and positron emission tomography (PET) studies in preclinical models including nonhuman primates (NHPs) that demonstrated high brain permeability of this compound. Our future work with radiolabeled lorlatinib will include advanced PET evaluations in rodent tumor models and normal NHPs with the goal of clinical translation.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1536012117736669","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35639255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

PET Study of Sphingosine-1-Phosphate Receptor 1 Expression in Response to Vascular Inflammation in a Rat Model of Carotid Injury. 颈动脉损伤大鼠血管炎症反应中鞘氨醇-1-磷酸受体1表达的PET研究

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012116689770

Hui Liu, Hongjun Jin, Xuyi Yue, Junbin Han, Pamela Baum, Dana R Abendschein, Zhude Tu

{"title":"PET Study of Sphingosine-1-Phosphate Receptor 1 Expression in Response to Vascular Inflammation in a Rat Model of Carotid Injury.","authors":"Hui Liu, Hongjun Jin, Xuyi Yue, Junbin Han, Pamela Baum, Dana R Abendschein, Zhude Tu","doi":"10.1177/1536012116689770","DOIUrl":"https://doi.org/10.1177/1536012116689770","url":null,"abstract":"Sphingosine-1-phosphate receptor (S1PR) activation plays a key role in vascular inflammatory response. Here, we report in vivo validation of [11C]TZ3321, a potent S1PR1 radioligand, for imaging vascular inflammation in a rat model of carotid injury. The right common carotid artery of male adult Sprague-Dawley rats was injured by balloon overinflation that denuded the endothelium and distended the vessel wall. Animals received a 60-minute micro-positron emission tomography (micro PET) scan with [11C]TZ3321 at 72 hours after injury. Ex vivo autoradiography was also conducted. The expression and cellular location of S1PR1 were examined by immunohistological analysis. Three-dimensional (3D) reconstruction of the first 100-second microPET/computed tomography (CT) image indicated the location of bilateral common carotid arteries. [11C]TZ3321 displayed significantly higher accumulation (standardized uptake values: 0.93 ± 0.07 vs 0.78 ± 0.09, n = 6, P = .001) in the injured carotid artery than in the contralateral side. Increased tracer uptake in the injured artery was confirmed by autoradiography (photostimulated luminescence measures: 85.5 ± 0.93 vs 71.48 ± 6.22, n = 2). Concordantly, high S1PR1expression was observed in infiltrated inflammatory cells in the injured artery. Our studies demonstrate [11C]TZ3321 microPET is able to detect the acute upregulation of S1PR1 expression in inflamed carotid artery. Therefore, [11C]TZ3321 has potential to be a PET radiotracer for detecting early inflammatory response and monitoring therapeutic efficacy of vascular inflammation.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1536012116689770","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35125050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19

Combination of Fluorescence-Guided Surgery With Photodynamic Therapy for the Treatment of Cancer. 荧光引导手术与光动力疗法相结合治疗癌症。

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012117722911

Jun He, Leping Yang, Wenjun Yi, Wentao Fan, Yu Wen, Xiongying Miao, Li Xiong

{"title":"Combination of Fluorescence-Guided Surgery With Photodynamic Therapy for the Treatment of Cancer.","authors":"Jun He, Leping Yang, Wenjun Yi, Wentao Fan, Yu Wen, Xiongying Miao, Li Xiong","doi":"10.1177/1536012117722911","DOIUrl":"10.1177/1536012117722911","url":null,"abstract":"Specific visualization of body parts is needed during surgery. Fluorescence-guided surgery (FGS) uses a fluorescence contrast agent for in vivo tumor imaging to detect and identify both malignant and normal tissues. There are several advantages and clinical benefits of FGS over other conventional medical imaging modalities, such as its safety, effectiveness, and suitability for real-time imaging in the operating room. Recent advancements in contrast agents and intraoperative fluorescence imaging devices have led to a greater potential for intraoperative fluorescence imaging in clinical applications. Photodynamic therapy (PDT) is an alternative modality to treat tumors, which uses a light-sensitive drug (photosensitizers) and special light to destroy the targeted tissues. In this review, we discuss the fluorescent contrast agents, some newly developed imaging devices, and the successful clinical application of FGS. Additionally, we present the combined strategy of FGS with PDT to further improve the therapeutic effect for patients with cancer. Taken together, this review provides a unique perspective and summarization of FGS.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/29/07/10.1177_1536012117722911.PMC5580848.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35306336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Developing a Strategy for Interventional Molecular Imaging of Oxidized Low-Density Lipoprotein in Atherosclerosis. 动脉粥样硬化中氧化低密度脂蛋白介入分子成像策略的研究。

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012117723788

Samata S Pandey, Dorian O Haskard, Ramzi Y Khamis

{"title":"Developing a Strategy for Interventional Molecular Imaging of Oxidized Low-Density Lipoprotein in Atherosclerosis.","authors":"Samata S Pandey, Dorian O Haskard, Ramzi Y Khamis","doi":"10.1177/1536012117723788","DOIUrl":"https://doi.org/10.1177/1536012117723788","url":null,"abstract":"The identification of vulnerable coronary artery atherosclerotic plaques offers the prospect of either localized or systematic therapeutic targeting in order to prevent myocardial infarction. Molecular imaging of atherosclerosis adds to morphological imaging by focusing on the immunobiology hidden in and behind the endothelium and therefore may be able to improve the identification of prospective culprit lesions. Our focus has been on identifying arterial accumulation of oxidized low-density lipoprotein (oxLDL) by exploiting advances in knowledge of vascular pathobiology. Here, we reflect on our work developing near-infrared fluorescence imaging of oxLDL using LO1, a monoclonal autoantibody generated in our laboratory. We detail progress to date and discuss our vision on taking the work through the early translational pipeline toward a multitargeted approach in imaging rupture-prone atherosclerotic plaques. Ultimately, molecular imaging of coronary arteries should be able to assess the regional risk that is specific to a lesion, which can then be used in concert with global risk factors to personalize the therapeutic strategy for patients in a way that goes beyond generalized population-based therapies.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/1536012117723788","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35383214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

First-in-Man Evaluation of ¹²⁴I-PGN650: A PET Tracer for Detecting Phosphatidylserine as a Biomarker of the Solid Tumor Microenvironment. 124I-PGN650：用于检测作为实体瘤微环境生物标记物的磷脂酰丝氨酸的 PET 示踪剂

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012117733349

Richard Laforest, Farrokh Dehdashti, Yongjian Liu, Jennifer Frye, Sarah Frye, Hannah Luehmann, Deborah Sultan, Joseph S Shan, Bruce D Freimark, Barry A Siegel

{"title":"First-in-Man Evaluation of 124I-PGN650: A PET Tracer for Detecting Phosphatidylserine as a Biomarker of the Solid Tumor Microenvironment.","authors":"Richard Laforest, Farrokh Dehdashti, Yongjian Liu, Jennifer Frye, Sarah Frye, Hannah Luehmann, Deborah Sultan, Joseph S Shan, Bruce D Freimark, Barry A Siegel","doi":"10.1177/1536012117733349","DOIUrl":"10.1177/1536012117733349","url":null,"abstract":"Purpose: PGN650 is a F(ab')2 antibody fragment that targets phosphatidylserine (PS), a marker normally absent that becomes exposed on tumor cells and tumor vasculature in response to oxidative stress and increases in response to therapy. PGN650 was labeled with 124I to create a positron emission tomography (PET) agent as an in vivo biomarker for tumor microenvironment and response to therapy. In this phase 0 study, we evaluated the pharmacokinetics, safety, radiation dosimetry, and tumor targeting of this tracer in a cohort of patients with cancer.Methods: Eleven patients with known solid tumors received approximately 140 MBq (3.8 mCi) 124I-PGN650 intravenously and underwent positron emission tomography-computed tomography (PET/CT) approximately 1 hour, 3 hours, and either 24 hours or 48 hours later to establish tracer kinetics for the purpose of calculating radiation dosimetry (from integration of the organ time-activity curves and OLINDA/EXM using the adult male and female models).Results: Known tumor foci demonstrated mildly increased uptake, with the highest activity at the latest imaging time. There were no unexpected adverse events. The liver was the organ receiving the highest radiation dose (0.77 mGy/MBq); the effective dose was 0.41 mSv/MBq.Conclusion: Although 124I-PGN650 is safe for human PET imaging, the tumor targeting with this agent in patients was less than previously observed in animal studies.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/c4/e8/10.1177_1536012117733349.PMC5648081.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35514759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Brain and Brown Adipose Tissue Metabolism in Transgenic Tg2576 Mice Models of Alzheimer Disease Assessed Using ¹⁸F-FDG PET Imaging. 利用 18F-FDG PET 成像评估阿尔茨海默病转基因 Tg2576 小鼠模型的大脑和棕色脂肪组织代谢。

IF 2.8 4区医学

Molecular Imaging Pub Date : 2017-01-01 DOI: 10.1177/1536012117704557

Robert A Coleman, Christopher Liang, Rima Patel, Sarah Ali, Jogeshwar Mukherjee

{"title":"Brain and Brown Adipose Tissue Metabolism in Transgenic Tg2576 Mice Models of Alzheimer Disease Assessed Using 18F-FDG PET Imaging.","authors":"Robert A Coleman, Christopher Liang, Rima Patel, Sarah Ali, Jogeshwar Mukherjee","doi":"10.1177/1536012117704557","DOIUrl":"10.1177/1536012117704557","url":null,"abstract":"Objective: Imaging animal models of Alzheimer disease (AD) is useful for the development of therapeutic drugs and understanding AD. Transgenic Swedish hAPPswe Tg2576 mice are a good model of β-amyloid plaques. We report 18F-fluoro-2-deoxyglucose (18F-FDG) positron emission tomography (PET) imaging of brain and intrascapular brown adipose tissue (IBAT) in transgenic mice 2576 (Tg2576) and wild-type (WT) mice.Methods: Transgenic Tg2576 mice and WT mice, >18 months were injected intraperitonally with ≈ 25 to 30 MBq 18F-FDG while awake. After 60 minutes, they were anesthetized with isoflurane (2.5%) and imaged with Inveon MicroPET. Select mice were killed, imaged ex vivo, and 20 µm sections cut for autoradiography. 18F-FDG uptake in brain and IBAT PET and brain autoradiographs were analyzed.Results: Fasting blood glucose levels averaged 120 mg/dL for WT and 100 mg/dL for Tg2576. Compared to WT, Tg2576 mice exhibited a decrease in SUVglc in the various brain regions. Average reductions in the cerebrum regions were as high as -20%, while changes in cerebellum were -3%. Uptake of 18F-FDG in IBAT decreased by -60% in Tg2576 mice and was found to be significant. Intrascapular brown adipose tissue findings in Tg2576 mice are new and not previously reported. Use of blood glucose for PET data analysis and corpus callosum as reference region for autoradiographic analysis were important to detect change in Tg2576 mice.Conclusion: Our results suggest that 18F-FDG uptake in the Tg2576 mice brain show 18F-FDG deficits only when blood glucose is taken into consideration.","PeriodicalId":18855,"journal":{"name":"Molecular Imaging","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ftp.ncbi.nlm.nih.gov/pub/pmc/oa_pdf/42/32/10.1177_1536012117704557.PMC5470140.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"35122872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0