News tagged with metabolism
Australian scientists have charted the path of insulin action in cells in precise detail like never before. This provides a comprehensive blueprint for understanding what goes wrong in diabetes.
Medical research May 21, 2013 | 4.6 / 5 (8) | 0 |
Gaucher disease causes debilitating and sometimes fatal neurodegeneration in early childhood. Recent studies have uncovered a link between the mutations responsible for Gaucher disease and an increased risk ...
Parkinson's & Movement disorders 11 hours ago | 5 / 5 (1) | 0 |
Researchers at Johns Hopkins have unraveled the molecular foundations of cocaine's effects on the brain, and identified a compound that blocks cravings for the drug in cocaine-addicted mice. The compound, already proven safe ...
Neuroscience May 22, 2013 | not rated yet | 0 |
(Medical Xpress)—Flinders University researchers are breaking new ground in a decade-long journey to pinpoint the function of two closely related proteins.
Diabetes May 20, 2013 | 5 / 5 (2) | 0 |
Optimal treatment of sleep apnea in patients with prediabetes improves blood sugar (glucose) levels and thus can reduce cardiometabolic risk, according to a study to be presented at the ATS 2013 International Conference in ...
Sleep apnea May 20, 2013 | not rated yet | 0 |
A new study looking at sleep-disordered breathing (SDB) and markers for Alzheimer's disease (AD) risk in cerebrospinal fluid (CSF) and neuroimaging adds to the growing body of research linking the two.
Alzheimer's disease & dementia May 19, 2013 | 5 / 5 (3) | 0 |
As the restaurant industry prepares to implement new rules requiring chains with 20 or more locations to post calorie content information, the results of a new study suggest that it would be beneficial to public health for ...
Health May 13, 2013 | not rated yet | 0 |
For nearly a decade, doctors have used an implanted electronic stimulator to treat severe depression in people who don't respond to standard antidepressant therapy.
Psychology & Psychiatry May 07, 2013 | not rated yet | 0 |
Harvard School of Public Health (HSPH) researchers have discovered that a particular type of protein (hormone) found in fat cells helps regulate how glucose (blood sugar) is controlled and metabolized (used for energy) in ...
Diabetes May 07, 2013 | 4.6 / 5 (8) | 1 |
Type 1 (insulin-dependent) diabetes appears to increase the risk of heart disease, the leading cause of death among people with high blood sugar, partly by stimulating the production of calprotectin, a protein that sparks ...
Inflammatory disorders May 07, 2013 | 4.5 / 5 (2) | 0 |
Scientists from the Luxembourg Centre for Systems Biomedicine (LCSB) of the University of Luxembourg have discovered that immune cells in the brain can produce a substance that prevents bacterial growth: namely itaconic acid. ...
Medical research May 06, 2013 | 5 / 5 (1) | 0 |
(Medical Xpress)—A new University of Arizona study, published in the journal Neurology, suggests a possible link between elevated blood sugar levels and risk for developing Alzheimer's disease.
Alzheimer's disease & dementia May 06, 2013 | not rated yet | 0 |
A study appearing in the Journal of Nutritional Biochemistry demonstrates that grapes are able to reduce heart failure associated with chronic high blood pressure (hypertension) by increasing the activity of several genes ...
Cardiology May 02, 2013 | 4.8 / 5 (4) | 0 |
A new study from investigators at the Benson-Henry Institute for Mind/Body Medicine at Massachusetts General Hospital (MGH) and Beth Israel Deaconess Medical Center (BIDMC) finds that elicitation of the relaxation response ...
Psychology & Psychiatry May 01, 2013 | 5 / 5 (1) | 0 |
While the search continues for the Fountain of Youth, researchers may have found the body's "fountain of aging": the brain region known as the hypothalamus. For the first time, scientists at Albert Einstein ...
Neuroscience May 01, 2013 | 4.8 / 5 (21) | 8 |
Metabolism is the set of chemical reactions that occur in living organisms to maintain life. These processes allow organisms to grow and reproduce, maintain their structures, and respond to their environments. Metabolism is usually divided into two categories. Catabolism breaks down organic matter, for example to harvest energy in cellular respiration. Anabolism, on the other hand, uses energy to construct components of cells such as proteins and nucleic acids.
The chemical reactions of metabolism are organized into metabolic pathways, in which one chemical is transformed into another by a sequence of enzymes. Enzymes are crucial to metabolism because they allow organisms to drive desirable but thermodynamically unfavorable reactions by coupling them to favorable ones, and because they act as catalysts to allow these reactions to proceed quickly and efficiently. Enzymes also allow the regulation of metabolic pathways in response to changes in the cell's environment or signals from other cells.
The metabolism of an organism determines which substances it will find nutritious and which it will find poisonous. For example, some prokaryotes use hydrogen sulfide as a nutrient, yet this gas is poisonous to animals. The speed of metabolism, the metabolic rate, also influences how much food an organism will require.
A striking feature of metabolism is the similarity of the basic metabolic pathways between even vastly different species. For example, the set of carboxylic acids that are best known as the intermediates in the citric acid cycle are present in all organisms, being found in species as diverse as the unicellular bacteria Escherichia coli and huge multicellular organisms like elephants. These striking similarities in metabolism are most likely the result of the high efficiency of these pathways, and of their early appearance in evolutionary history.
For more information about Metabolism, read the full article at
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