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Insulin regulates glucose uptake by normal tissues. Although there is evidence that certain cancers are growth-stimulated by insulin, the possibility that insulin influences tumor glucose uptake as assessed by ( 18) F-2-Fluoro-2-Deoxy-D-Glucose Positron Emission Tomography (FDG-PET) has not been studied in detail. We present a model of diet-induced hyperinsulinemia associated with increased insulin receptor activation in neoplastic tissue, and with increased tumor FDG-PET image intensity. Metformin abolished the diet-induced increases in serum insulin level, tumor insulin receptor activation, and tumor FDG uptake associated with the high-energy diet, but had no effect on these measurements in mice on a control diet. These findings provide the first functional imaging correlate of the well-known adverse effect of caloric excess on cancer outcome. They demonstrate that for a subset of neoplasms, diet and insulin are variables that affect tumor FDG uptake, and have implications for design of clinical trials of metformin as an anti-neoplastic agent.
Department of Experimental Medicine; McGill University and Cancer Prevention Center; SMBD-Jewish General Hospital; McGill University; Montreal, QC, Canada.
This article was published in the following journal.
Name: Cell cycle (Georgetown, Tex.)
A Large Cohort Study of 18F Fluoro-Deoxy-Glucose Uptake in Normal Spinal Cord: Quantitative Assessment of the Contamination From Adjacent Vertebral Marrow Uptake and Validity of Normalizing the Cord Uptake Against the Lumbar Thecal Sac.
This study aimed (1) to assess the influence of age, sex, blood glucose, and body mass index on the F fluoro-deoxy-glucose (F-FDG) uptake in normal spinal cord; (2) to quantitatively evaluate contamin...
Determination of intra-tumor high-uptake area using 2-deoxy-2-[(18)F]fluoro-D-glucose ([(18)F]FDG) positron emission tomography (PET) imaging is an important consideration for dose painting in radiati...
This study aimed to systematically review the additional value of F-fluoro-2-deoxy-D-glucose positron emission tomography (FDG-PET) to computed tomography (CT) for staging newly diagnosed follicular l...
Metformin is an oral antihyperglycaemic drug used as first-line treatment of type 2 diabetes. Metformin's classical and most well-known blood glucose-lowering mechanisms include reduction of hepatic g...
To investigate the role of 2-(fluorine-18)-fluoro-2-deoxy-D-glucose ((18)F-FDG) positron emission tomography/computed tomography (PET/CT) early after breast-conserving surgery (BCS) in patients with b...
Tuberculosis (TB) remains a major public health problem. In extra-pulmonary forms, evidence of bacteriological cure is difficult to be obtained raising the need for other therapeutic asses...
18F-FDG PET/CT (2-[fluorine-18] fluoro-2-deoxy-D-glucose, Positron emission tomography- CT) is a noninvasive technique that allows quantifying and precisely localizing 18F-FDG uptake in th...
The objective of this pilot study are (i) to compare response to chemotherapy, time to disease progression and overall survival in patients with pancreatic cancer who will be treated with ...
Metformin is known to increase 18F-FDG uptake in subjects using metformin in retrospective trials. In this study the researchers aim to investigate the influence of metformin (500 mg 1/da...
The objectives of this study are to compare the effects of rosiglitazone and metformin on insulin stimulated glucose uptake in subjects with type 2 diabetes. Whole body, and skeletal muscl...
A biguanide hypoglycemic agent used in the treatment of non-insulin-dependent diabetes mellitus not responding to dietary modification. Metformin improves glycemic control by improving insulin sensitivity and decreasing intestinal absorption of glucose. (From Martindale, The Extra Pharmacopoeia, 30th ed, p289)
A glucose transport protein found in mature MUSCLE CELLS and ADIPOCYTES. It promotes transport of glucose from the BLOOD into target TISSUES. The inactive form of the protein is localized in CYTOPLASMIC VESICLES. In response to INSULIN, it is translocated to the PLASMA MEMBRANE where it facilitates glucose uptake.
An enzyme of the isomerase class that catalyzes the eliminative cleavage of polysaccharides containing 1,4-linked D-glucuronate or L-iduronate residues and 1,4-alpha-linked 2-sulfoamino-2-deoxy-6-sulfo-D-glucose residues to give oligosaccharides with terminal 4-deoxy-alpha-D-gluc-4-enuronosyl groups at their non-reducing ends. (From Enzyme Nomenclature, 1992) EC 188.8.131.52.
2-Deoxy-D-arabino-hexose. An antimetabolite of glucose with antiviral activity.
A non-metabolizable glucose analogue that is not phosphorylated by hexokinase. 3-O-Methylglucose is used as a marker to assess glucose transport by evaluating its uptake within various cells and organ systems. (J Neurochem 1993;60(4):1498-504)
Cancer is not just one disease but many diseases. There are more than 100 different types of cancer. Most cancers are named for the organ or type of cell in which they start - for example, cancer that begins in the colon is called colon cancer; cancer th...
Head and neck cancers
Cancer can occur in any of the tissues or organs in the head and neck. There are over 30 different places that cancer can develop in the head and neck area. Mouth cancers (oral cancers) - Mouth cancer can develop on the lip, the tongue, the floor...