摘要:
Provided herein are methods for determining the metabolism of one or more sugars and/or fatty acids, and applications thereof. Such applications include determining the rate of glycogen synthesis and glycolysis, which are believed to be early markers for predicting elevated risk of diabetes and cardiovascular disease. Other applications include methods for screening drugs that effect sugar and/or fatty acid metabolism. The methods are useful for at least partially characterizing drugs for desirable or undesirable (toxic) characteristics. Drugs that are at least partially characterized using the methods of the invention can then be further developed in pre-clinical testing and clinical trials. Such drugs may be found to be useful in treating obesity, diabetes, cardiovascular disease, and other disorders of metabolism.
摘要:
Methods of determining rate of biosynthesis or breakdown of biological molecules from metabolic derivatives and catabolic products are disclosed herein. In particular, methods of measuring the rates of biosynthesis and breakdown of biological molecules inaccessible or not easily accessible to direct sampling by sampling metabolic derivatives and catabolic products in accessible biological samples are disclosed herein.
摘要:
Methods of determining rate of biosynthesis or breakdown of biological molecules from metabolic derivatives and catabolic products are disclosed herein. In particular, methods of measuring the rates of biosynthesis and breakdown of biological molecules inaccessible or not easily accessible to direct sampling by sampling metabolic derivatives and catabolic products in accessible biological samples are disclosed herein.
摘要:
The Applicants have established a simple, rapid assay of measuring the dynamics of self-assembling systems of biological molecules, based on stable isotope labeling technology that can be used in intact animals including humans. Examples of self-assembling systems of biological molecules include microtubule polymers, actin filaments, amyloid-beta plaques or fibrils, prion plaques or fibrils, fibrin aggregates, tau filaments (e.g., neurofibrillary tangles), α-synuclein filaments, and mutant hemoglo-bin aggregates. The method reveals constitutive differences in the dynamics of assembly and disassembly between tissues and is sensitive to the action of compounds that stabilize these dynamics.
摘要:
The invention relates to techniques for measuring and comparing relative molecular flux rates of different biological molecules by administering isotope-labeled water to one or more tissues or individuals and comparing the molecular flux rates of two or more biological molecules, including biological molecules in different chemical classes. The methods find use in several applications including diagnosing, prognosing, or monitoring a disease, disorder, or condition, the in vivo high-throughput screening of chemical entities and biological factors for therapeutic effects in various disease models, and the in vivo high-throughput screening of chemical entities and biological factors for toxic effects.
摘要:
The present invention relates to biochemical methods for determining reverse cholesterol transport. Specifically, the rates of the two arms of reverse cholesterol transport (HDL or first arm and post-HDL or second arm) are obtained by measuring the flow of unlabeled cholesterol from tissues into plasma HDL and from plasma HDL to bile acids.
摘要:
The present invention relates to a labeled deoxyribonucleic acid (DNA) molecule. In one aspect, the labeled DNA molecule is produced by contacting a cell or subject with a detectable amount of a stable isotope label which is incorporated into DNA via the de novo nucleotide synthesis pathway to produce the labeled DNA molecule.
摘要:
A method for determining the mass isotope enrichment of a subunit from which a biopolymer is formed, and the rates of synthesis and decay of the biopolymer. The mass isotope enrichment of the subunit is determined by comparing the mass isotopomer distribution of the biopolymer after administration of a mass isotopically labeled subunit, with the expected frequencies of the different mass isotopomers produced from a given subunit mass isotope enrichment. To determine the synthesis rate of the biopolymer, the expected frequency of a selected biopolymer mass isotopomer, calculated from the subunit isotope enrichment, is compared with the actual frequency of that biopolymer mass isotopomer. To determine biopolymer decay, the decay rate of high mass isotopomers of the biopolymer is determined.
摘要:
Provided are methods for determining concurrently with a simple, minimally invasive test, the adequacy of pancreatic beta-cell compensation and/or the presence of tissue insulin resistance in a subject human or an experimental animal. The methods allow for the determination of a subject's or experimental animal's susceptibility to developing type 2 diabetes mellitus (DM2) or to progression to more advanced forms of DM2. Among other uses, the methods allow for diagnostic classification of subjects for decisions regarding therapeutic interventions, clinical differentiation between type 1 DM and DM2, clinical monitoring of treatments intended to reduce risk of developing DM2 in non-diabetic subjects, clinical monitoring of agents intended to improve existing DM2 and to prevent progression of DM2, clinical development and testing of new compounds, candidate agents, or candidate therapies for preventing progression to DM2 or disease progression in existing DM2, and preclinical screening of candidate agents or candidate therapies in experimental animals to identify and characterize agents having insulin-sensitizing properties, pancreatic stimulatory or regenerative properties or other desirable actions.
摘要:
The invention enables high-throughput screening of compounds in living systems to detect unanticipated or unintended biological actions. The invention also allows for screening, detection, and confirmation of new indications for approved drugs. Screening and detection of toxic effects of compounds also can be achieved by using the methods of the invention. The methods comprise administering isotope-labeled substrates to a living system so that the label is incorporated into molecules in a manner that reveals flux rates through metabolic pathways thought to be involved in a disease. Comparisons between living systems exposed to compounds and living systems not so exposed reveals the effects of the compounds on the flux rates through the metabolic pathways. Combinations or mixtures of compounds can be systematically screened to detect unanticipated or unintended biological actions, including synergistic actions, in the same manner.