1278 lines
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<meta name="description" content="Scientists may be better able to study how heavy drinking damages the liver using a new mouse model of alcohol drinking and disease developed by researchers from the National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institutes of Health. The model incorporates chronic and binge drinking patterns to more closely approximate alcoholic liver disease in humans than any existing method. A report of the new model appears in the March issue of the journal Nature Protocols." />
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NIH develops improved mouse model of alcoholic liver disease
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<span>NIH develops improved mouse model of alcoholic liver disease</span>
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<div class="news-type">News Release</div>
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<p><time datetime="2013-02-28T12:00:00Z">Thursday, February 28, 2013</time>
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<p>Scientists may be better able to study how heavy drinking damages the liver using a new mouse model of alcohol drinking and disease developed by researchers from the National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institutes of Health. The model incorporates chronic and binge drinking patterns to more closely approximate alcoholic liver disease in humans than any existing method. A report of the new model appears in the March issue of the journal Nature Protocols.</p>
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<p>“The NIAAA model represents a significant advance in understanding the progression of alcoholic liver disease, which in severe cases can lead to liver failure and death. By replicating both chronic and binge drinking, we are able to simulate the natural drinking patterns of many alcoholic hepatitis patients and the resulting liver injury,” said Kenneth R. Warren, Ph.D., acting director of the NIAAA.</p>
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<p><a href="/sites/default/files/pictures/NIAAA-Mouse-Model-Image.jpg"><img alt="NIAAA mouse model" src="/sites/default/files/pictures/NIAAA-Mouse-Model-Image.jpg" style="width: 360px; height: 532px; float: right; margin: 10px;"></a>In the body, the liver filters out harmful substances and plays a key role in breaking down alcohol. Alcoholic liver disease (ALD) refers to a broad range of liver injury caused by drinking. Some forms are mild and reversible while others, such as cirrhosis, are life-threatening and irreversible. Fatty liver disease, an early form of ALD marked by a build-up of fat in liver cells, occurs in almost all heavy drinkers, but liver damage can usually be reversed if the individual stops drinking.</p>
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<p>About 20–40 percent of heavy drinkers will develop more severe forms of alcoholic liver disease, including alcoholic hepatitis, which involves inflammation and swelling of the liver, and cirrhosis, which can lead to liver failure as scar tissue accumulates on the organ. Scientists do not completely understand why some people progress to more severe forms of ALD, although gender, obesity, genetic and dietary factors, and smoking may play a role.</p>
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<p>“Many of the models for alcoholic liver disease currently used do not evoke the full range of symptoms or are expensive and technically difficult,” said senior author Bin Gao, M.D., Ph.D., chief of the NIAAA Laboratory of Liver Diseases.</p>
|
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<p>In the most common model currently used, mice are allowed to feed for four to six weeks on a liquid diet that contains 5 percent ethanol. But without the additional liver injury commonly seen from binge alcohol exposure, this model only induces mild fat accumulation in liver cells, slightly elevated liver enzymes indicating damage, and little or no inflammation. Models that are better at replicating more severe forms of ALD involve infusing alcohol directly into the mouse’s stomach, which requires intensive medical care for the animals, a high degree of technical expertise, and costly equipment. </p>
|
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<p>The NIAAA model involves a 10-day feeding of an alcohol-containing liquid diet, followed by a single high-dose feeding of alcohol to approximate binge drinking. This results in marked elevation of fatty liver and enzymes indicating liver injury. </p>
|
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<p>“The NIAAA model is less costly, more time efficient, and easy to perform. Importantly, it may more closely resemble the progression of human alcoholic hepatitis,” said Dr. Gao. He noted that it may also be useful in studying damage to other organs caused by heavy drinking, including the heart, lungs, kidneys, pancreas, and central nervous system.</p>
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<p> </p>
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<p><strong>Reference</strong><p>
|
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<p>Bertola A, Mathews S, Ki SH, Wang H, Gao B. Mouse model of chronic and binge ethanol feeding (the NIAAA model). Nature Protocols. February 28, 2013. (Epub before print)</p>
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<p><strong>About the National Institute on Alcohol Abuse and Alcoholism (NIAAA):</strong><br>
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The National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institutes of Health, is the primary U.S. agency for conducting and supporting research on the causes, consequences, diagnosis, prevention, and treatment of alcohol use disorder. NIAAA also disseminates research findings to general, professional, and academic audiences. Additional alcohol research information and publications are available at <a href="/" rel="nofollow noreferrer">www.niaaa.nih.gov</a>.</p>
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<p><strong>About the National Institutes of Health (NIH):</strong><br>
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NIH, the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases. For more information about NIH and its programs, visit <a href="https://www.nih.gov/" rel="noreferrer noopener">www.nih.gov</a>.</p>
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