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C 11 Methionine

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https://www.readbyqxmd.com/read/29779472/effect-of-body-weight-on-metabolic-hormones-and-fatty-acid-metabolism-in-follicular-fluid-of-women-undergoing-in-vitro-fertilization-a-pilot-study
#1
Laurice Bou Nemer, Haolin Shi, Bruce Richard Carr, Ruth Ann Word, Orhan Bukulmez
INTRODUCTION: Obesity is an epidemic affecting more than one-third of adults in the United States. Obese women experience decreased fertility, explained in part by oocyte quality. Since follicular fluid (FF) provides an important microenvironment for oocyte growth, we sought to evaluate the effect of increased body weight on FF levels of 11 metabolic hormones and fatty acid metabolism. METHODS: The FF was collected from 25 women (10 normal weight, 10 overweight, and 5 obese) with diminished ovarian reserve undergoing in vitro fertilization (IVF) following a minimal stimulation protocol...
January 1, 2018: Reproductive Sciences
https://www.readbyqxmd.com/read/29760596/-11-c-methionine-positron-emission-tomography-for-target-delineation-of-recurrent-glioblastoma-in-re-irradiation-planning
#2
Hidekazu Tanaka, Takahiro Yamaguchi, Kae Hachiya, Kazuhiro Miwa, Jun Shinoda, Masahide Hayashi, Shinichi Ogawa, Hironori Nishibori, Satoshi Goshima, Masayuki Matsuo
Aim: To define the optimal margin on MRI scans in the re-radiation planning of recurrent glioblastoma using methionine positron emission tomography (MET-PET). Background: It would be very useful if the optimal margin on MRI to cover the uptake area on MET-PET is known. Materials and Methods: CT, MRI, and MET-PET were performed separately over the course of 2 weeks. Among the MRI scans, we used the contrast-enhanced T1-weighted images (Gd-MRI) and T2-weighted images (T2-MRI)...
May 2018: Reports of Practical Oncology and Radiotherapy
https://www.readbyqxmd.com/read/29725480/influence-of-region-of-interest-designs-on-quantitative-measurement-of-multimodal-imaging-of-mr-non-enhancing-gliomas
#3
Koji Takano, Manabu Kinoshita, Hideyuki Arita, Yoshiko Okita, Yasuyoshi Chiba, Naoki Kagawa, Yoshiyuki Watanabe, Eku Shimosegawa, Jun Hatazawa, Naoya Hashimoto, Yasunori Fujimoto, Haruhiko Kishima
A number of studies have revealed the usefulness of multimodal imaging in gliomas. Although the results have been heavily affected by the method used for region of interest (ROI) design, the most discriminatory method for setting the ROI remains unclear. The aim of the present study was to determine the most suitable ROI design for 18 F-fluorodeoxyglucose (FDG) and 11 C-methionine (MET) positron emission tomography (PET), apparent diffusion coefficient (ADC), and fractional anisotropy (FA) obtained by diffusion tensor imaging (DTI) from the viewpoint of grades of non-enhancing gliomas...
May 2018: Oncology Letters
https://www.readbyqxmd.com/read/29609181/improved-uterine-immune-mediators-in-holstein-cows-supplemented-with-rumen-protected-methionine-and-discovery-of-neutrophil-extracellular-traps-net
#4
S L Stella, D A Velasco-Acosta, C Skenandore, Z Zhou, A Steelman, D Luchini, F C Cardoso
During the transition from prepartum to early lactation, dairy cows often experience negative energy balance (NEB) that may result in reproductive stress and decreased fertility. The objective of this study was to observe the effects of rumen-protected methionine (RPM) on plasma amino acid concentrations, uterine cytology, immunohistochemistry (IHC) of glutathione peroxidase 1 (GPX) and superoxide dismutase 1 (SOD), and to confirm neutrophil extracellular trap (NET) formation. Multiparous Holstein cows (n = 20) were randomly assigned to two treatments starting at 21 d before calving until 73 days in milk (DIM)...
March 26, 2018: Theriogenology
https://www.readbyqxmd.com/read/29564749/characteristics-of-time-activity-curves-obtained-from-dynamic-11-c-methionine-pet-in-common-primary-brain-tumors
#5
Yuichi Nomura, Yoshitaka Asano, Jun Shinoda, Hirohito Yano, Yuka Ikegame, Tomohiro Kawasaki, Noriyuki Nakayama, Takashi Maruyama, Yoshihiro Muragaki, Toru Iwama
PURPOSE: The aim of this study was to assess whether dynamic PET with11 C-methionine (MET) (MET-PET) is useful in the diagnosis of brain tumors. METHODS: One hundred sixty patients with brain tumors (139 gliomas, 9 meningiomas, 4 hemangioblastomas and 8 primary central nervous system lymphomas [PCNSL]) underwent dynamic MET-PET with a 3-dimensional acquisition mode, and the maximum tumor MET-standardized uptake value (MET-SUV) was measured consecutively to construct a time-activity curve (TAC)...
March 21, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29514295/effects-of-adding-methionine-in-low-protein-diet-and-subsequently-fed-low-energy-diet-on-productive-performance-blood-chemical-profile-and-lipid-metabolism-related-gene-expression-of-broiler-chickens
#6
P Jariyahatthakij, B Chomtee, T Poeikhampha, W Loongyai, C Bunchasak
This study was conducted to evaluate the effects of supplementing methionine (Met) in a low-protein (Low-CP) diet during d 11 to 24 and subsequently feeding with a low-metabolizable energy diet (Low-ME; -75 kcal/kg) or a normal ME diet during d 25 to 42 on the productive performance, blood chemical profile, and lipid metabolism-related gene expression of broiler chickens. The 1,600 broiler chicks were divided into 5 groups as follows: 1) Normal CP, then Normal ME; 2) Low-CP, then Normal ME; 3) Low-CP, then Low-ME; 4) Low-CP+Met, then Normal ME; and 5) Low-CP+Met, then Low-ME...
June 1, 2018: Poultry Science
https://www.readbyqxmd.com/read/29488086/amide-proton-transfer-imaging-seems-to-provide-higher-diagnostic-performance-in-post-treatment-high-grade-gliomas-than-methionine-positron-emission-tomography
#7
Ji Eun Park, Ji Ye Lee, Ho Sung Kim, Joo-Young Oh, Seung Chai Jung, Sang Joon Kim, Jochen Keupp, Minyoung Oh, Jae Seung Kim
OBJECTIVES: To compare the diagnostic performance of amide proton transfer (APT) imaging and 11-C methionine positron emission tomography (MET-PET) for in vivo molecular imaging of protein metabolism in post-treatment gliomas. MATERIALS AND METHODS: This study included 43 patients (12 low and 31 high grade) with post-treatment gliomas who underwent both APT and MET-PET imaging within 3 weeks. APT-weighted voxel values and semi-quantitative tumour-to-normal ratios (TNR) were obtained from tumour portions...
February 27, 2018: European Radiology
https://www.readbyqxmd.com/read/29464269/glioma-grading-by-dynamic-susceptibility-contrast-perfusion-and-11-c-methionine-positron-emission-tomography-using-different-regions-of-interest
#8
Cornelia Brendle, Johann-Martin Hempel, Jens Schittenhelm, Marco Skardelly, Gerald Reischl, Benjamin Bender, Ulrike Ernemann, Christian la Fougère, Uwe Klose
PURPOSE: The use of dynamic susceptibility contrast (DSC) perfusion and 11 C-methionine positron emission tomography (MET-PET) for glioma grading is currently not standardized. The purpose of this study was to identify regions of interest (ROIs) that enable the best performance and clinical applicability in both methods, as well as to evaluate the complementarity of DSC perfusion and MET-PET in spatial hotspot definition. METHODS: In 41 patient PET/MRI datasets, different ROIs were drawn: in T2-hyperintense tumour, in T2-hyperintense tumour and adjacent oedema and in tumour areas with contrast enhancement, altered perfusion or pathological radiotracer uptake...
April 2018: Neuroradiology
https://www.readbyqxmd.com/read/29340638/dietary-energy-digestible-lysine-and-available-phosphorus-levels-affect-growth-performance-carcass-traits-and-amino-acid-digestibility-of-broilers
#9
Nishchal K Sharma, Mingan Choct, Mehdi Toghyani, Yan C S M Laurenson, C K Girish, Robert A Swick
A 3-factor, 3-level Box-Behnken design was used to investigate the interaction effect of dietary digestible lysine (dLys, 9.5, 10.5, 11.5 g/kg), apparent metabolizable energy (AMEn, 12.77, 13.19, 13.61 MJ/kg) and available P (avP, 3.0, 4.0, 5.0 g/kg) levels on performance and amino acid (AA) digestibility of Ross 308 male broilers (n = 1,050) from d 14 to 34. The design consisted of 15 treatments each replicated 5 times with 12 birds per replicate. On d 34, 3 birds were sampled from each pen to collect ileal digesta (pooled per pen) to analyze AA...
April 1, 2018: Poultry Science
https://www.readbyqxmd.com/read/29340158/follicular-thyroid-cancer-avid-on-c-11-methionine-pet-ct
#10
Mads Ryø Jochumsen, Peter Iversen, Anne Kirstine Arveschoug
A case of follicular thyroid cancer with intense focal Methionine uptake on 11C-Methionine PET/CT is reported here. The use of 11C-Methionine PET in differentiated thyroid cancer is currently being investigated as a surrogate tracer compared to the more widely used 18F-FDG PET. This case illustrates the potential incremental value of this modality, not only in the localizing of parathyroid adenoma, but also indicating that 11C-Methionine PET might have a potential of increasing the pretest likelihood of thyroid malignancy in a cold nodule with highly increased Sestamibi uptake...
2018: Endocrinology, Diabetes & Metabolism Case Reports
https://www.readbyqxmd.com/read/29164057/diagnostic-and-prognostic-significance-of-methionine-uptake-and-methionine-positron-emission-tomography-imaging-in-gliomas
#11
REVIEW
Kamalakannan Palanichamy, Arnab Chakravarti
The present most common image diagnostic tracer in clinical practice for glioma is18 F-fluorodeoxyglucose (FDG) positron emission tomography (PET) for brain tumors diagnosis and prognosis. PET is a promising molecular imaging technique, which provides real-time information on the metabolic behavior of the tracer. The diffusive nature of glioblastoma (GBM) and heterogeneity often make the radiographic detection by FDG-PET inaccurate, and there is no gold standard. FDG-PET often leads to several controversies in making clinical decisions due to their uptake by normal surrounding tissues, and pose a challenge in delineating treatment-induced necrosis, edema, inflammation, and pseudoprogression...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/29140741/comparative-in-vitro-study-of-11-c-methionine-and-11-c-deuterodeprenyl-uptake-in-three-human-glioma-cell-lines
#12
Elena Vasilskis, Ingrid Kreimerman, Silvia Olivera, Eduardo Savio, Henry Engler
AIM: To compare the uptake of (11)C-deuterodeprenyl ((11)C-DED) and (11)C-methionine ((11)C-MET) in three human glioma cell lines and study the relationship with glial fibrillary acid protein (GFAP) and monoamine oxidase B (MAO B) expression. (11)C-DED is used in positron emission tomography imaging as a marker of astrocytosis in various central nervous system pathologies. It binds irreversibly to MAO B, a glial dimeric enzyme with increased activity in some neurological pathologies. MATERIALS AND METHODS: Binding and internalization studies of (11)C-MET and (11)C-DED were performed in astrocytoma grade III, glioblastoma grade IV, and radio-resistant glioblastoma grade IV cells...
November 2017: Cancer Biotherapy & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29120944/targeted-genotyping-identifies-susceptibility-locus-in-brain-derived-neurotrophic-factor-gene-for-chronic-postsurgical-pain
#13
Yuanyuan Tian, Xiaodong Liu, Mingzhong Jia, Hui Yu, Peter Lichtner, Yujian Shi, Zhaoyu Meng, Shanglong Kou, Idy H T Ho, Bo Jia, Benny C P Cheng, Carmen K M Lam, Sharon Tsang, Sunny H Wong, Jun Yu, Christopher H K Cheng, Tony Gin, William K K Wu, Zheyu Chen, Matthew T V Chan
BACKGROUND: The purpose of this study was to evaluate the association between single-nucleotide polymorphisms and chronic postsurgical pain. METHODS: Using GoldenGate genotyping assays, we genotyped 638 polymorphisms within 54 pain-related genes in 1,152 surgical patients who were enrolled in our Persistent Pain after Surgery Study. Patients were contacted by phone to determine whether they had chronic postsurgical pain at 12 months. Polymorphisms identified were validated in a matched cohort of 103 patients with chronic postsurgical pain and 103 patients who were pain free...
March 2018: Anesthesiology
https://www.readbyqxmd.com/read/29114181/kinetic-modelling-of-infection-tracers-18-f-fdg-68-ga-ga-citrate-11-c-methionine-and-11-c-donepezil-in-a-porcine-osteomyelitis-model
#14
Lars Jødal, Svend B Jensen, Ole L Nielsen, Pia Afzelius, Per Borghammer, Aage K O Alstrup, Søren B Hansen
Introduction: Positron emission tomography (PET) is increasingly applied for infection imaging using [18 F]FDG as tracer, but uptake is unspecific. The present study compares the kinetics of [18 F]FDG and three other PET tracers with relevance for infection imaging. Methods: A juvenile porcine osteomyelitis model was used. Eleven pigs underwent PET/CT with 60-minute dynamic PET imaging of [18 F]FDG, [68 Ga]Ga-citrate, [11 C]methionine, and/or [11 C]donepezil, along with blood sampling...
2017: Contrast Media & Molecular Imaging
https://www.readbyqxmd.com/read/29110648/prospective-study-of-11-c-methionine-pet-for-distinguishing-between-recurrent-brain-metastases-and-radiation-necrosis-%C3%A2-limitations-of-diagnostic-accuracy-and-long-term-results-of-salvage-treatment
#15
Shoji Yomo, Kazuhiro Oguchi
BACKGROUND: On conventional diagnostic imaging, the features of radiation necrosis (RN) are similar to those of local recurrence (LR) of brain metastases (BM). (11)C-methionine positron emission tomography (MET-PET) is reportedly useful for making a differential diagnosis between LR and RN. In this prospective study, we aimed to investigate the diagnostic performance of MET-PET and the long-term results of subsequent patient management. METHODS: The eligible subjects had enlarging contrast-enhanced lesions (>1 cm) on MR imaging after any form of radiotherapy for BM, suggesting LR or RN...
November 6, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28913155/hepatic-metabolism-of-11-c-methionine-and-secretion-of-11-c-protein-measured-by-pet-in-pigs
#16
Jacob Horsager, Susanne Bach Lausten, Dirk Bender, Ole Lajord Munk, Susanne Keiding
Hepatic amino acid metabolism and protein secretion are essential liver functions that may be altered during metabolic stress, e.g. after surgery. We wished to develop a dynamic liver PET method using the radiolabeled amino acid (11)C-methionine to examine this question. Eleven 40-kg pigs were allocated to either laparotomy or pneumoperitoneum. 24 hours after surgery a 70-min dynamic PET scanning of the liver with arterial blood sampling was performed immediately after intravenous injection of (11)C-methionine...
2017: American Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28906344/value-of-the-visual-and-semiquantitative-analysis-of-carbon-11-methionine-pet-ct-in-brain-tumors-recurrence-versus-post-therapeutic-changes
#17
Nestor Martínez-Amador, Julio Jiménez-Bonilla, Isabel Martínez-Rodríguez, Maria De Arcocha-Torres, Remedios Quirce, Francisco J Gómez-de la Fuente, Jorge L López-Defilló, Ignacio Banzo
To compare the visual and semiquantitative analysis of carbon-11-methionine (C-MET) PET/computed tomography (CT) images in patients with primary brain tumors and suspected recurrence, persistence, or necrotic post-therapeutic changes. A total of 41 consecutive C-MET-PET/CT scans on 35 (21 men, mean age 44.1±16.6 years) patients were requested for MRI suspicion of recurrent or persistent primary tumor after therapy. The C-MET PET/CT were obtained 20 min after an intravenous injection of 555-740 MBq (15-20 mCi) of C-MET...
December 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28882867/diagnostic-accuracy-of-neuroimaging-to-delineate-diffuse-gliomas-within-the-brain-a-meta-analysis
#18
N Verburg, F W A Hoefnagels, F Barkhof, R Boellaard, S Goldman, J Guo, J J Heimans, O S Hoekstra, R Jain, M Kinoshita, P J W Pouwels, S J Price, J C Reijneveld, A Stadlbauer, W P Vandertop, P Wesseling, A H Zwinderman, P C De Witt Hamer
BACKGROUND: Brain imaging in diffuse glioma is used for diagnosis, treatment planning, and follow-up. PURPOSE: In this meta-analysis, we address the diagnostic accuracy of imaging to delineate diffuse glioma. DATA SOURCES: We systematically searched studies of adults with diffuse gliomas and correlation of imaging with histopathology. STUDY SELECTION: Study inclusion was based on quality criteria. Individual patient data were used, if available...
October 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28802548/optic-nerve-glioblastoma-detected-by-11-c-methionine-brain-pet-ct
#19
V Rizzo, M V Mattoli, G Trevisi, A Coli, M L Calcagni, N Montano
No abstract text is available yet for this article.
August 9, 2017: Revista Española de Medicina Nuclear e Imagen Molecular
https://www.readbyqxmd.com/read/28801560/imaging-active-infection-in-vivo-using-d-amino-acid-derived-pet-radiotracers
#20
Kiel D Neumann, Javier E Villanueva-Meyer, Christopher A Mutch, Robert R Flavell, Joseph E Blecha, Tiffany Kwak, Renuka Sriram, Henry F VanBrocklin, Oren S Rosenberg, Michael A Ohliger, David M Wilson
Occult bacterial infections represent a worldwide health problem. Differentiating active bacterial infection from sterile inflammation can be difficult using current imaging tools. Present clinically viable methodologies either detect morphologic changes (CT/ MR), recruitment of immune cells ((111)In-WBC SPECT), or enhanced glycolytic flux seen in inflammatory cells ((18)F-FDG PET). However, these strategies are often inadequate to detect bacterial infection and are not specific for living bacteria. Recent approaches have taken advantage of key metabolic differences between prokaryotic and eukaryotic organisms, allowing easier distinction between bacteria and their host...
August 11, 2017: Scientific Reports
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