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Tag Archives: Physiology

Even small stressors may be harmful to men’s health, new research shows

Even small stressors may be harmful to men’s health, new research shows

Older men who lead high-stress lives, either from chronic everyday hassles or because of a series of significant life events, are likely to die earlier than the average for their peers, new research from Oregon State University shows. “We’re looking at long-term patterns of stress — if your stress level is chronically high, it could impact your mortality, or if you have a series of stressful life events, that could affect your mortality,” said Carolyn Aldwin, director of the Center for Healthy Aging Research in the College of Public Health and Human Sciences at OSU Continue reading

Taking pulse of aging of the brain

Taking pulse of aging of the brain

Researchers at the Beckman Institute at the University of Illinois at Urbana-Champaign have developed a new technique that can noninvasively image the pulse pressure and elasticity of the arteries of the brain, revealing correlations between arterial health and aging. Brain artery support, which makes up the cerebrovascular system, is crucial for healthy brain aging and preventing diseases like Alzheimer’s and other forms of dementia. Continue reading

Elusive viral ‘machine’ architecture finally rendered

Elusive viral ‘machine’ architecture finally rendered

For half a century biologists have studied the way that the lambda virus parks DNA in the chromosome of a host E. coli bacterium and later extracts it as a model reaction of genetic recombination. Continue reading

Bioengineers create functional 3-D brain-like tissue: Tissue kept alive for months

Bioengineers create functional 3-D brain-like tissue: Tissue kept alive for months

Bioengineers have created three-dimensional brain-like tissue that functions like and has structural features similar to tissue in the rat brain and that can be kept alive in the lab for more than two months. Continue reading

Does your training routine really need to be that complicated?

Does your training routine really need to be that complicated?

A new study just published in Applied Physiology, Nutrition, and Metabolism investigated the value of the Pre-Exhaustion (PreEx) training method and found that that the various arrangements of different exercise protocols is of less relevance than simply performing resistance training exercises with a high intensity of effort within any protocol. As resistance training is becoming a major intervention for health and disease prevention, improved understanding in this area is increasingly important. Continue reading

Immune cell’s role in intestinal movement may lead to better understanding of irritable bowel syndrome

Immune cell’s role in intestinal movement may lead to better understanding of irritable bowel syndrome

Learning the role of immune-system cells in healthy digestive tracts and how they interact with neighboring nerve cells may lead to new treatments for irritable bowel syndrome (IBS). Researchers from Penn State College of Medicine, in collaboration with other scientists, have reported the role of macrophages in regulating the contractions of the colon to push digested material through the digestive tract. The muscular lining of the intestine contains a distinct kind of macrophage, an immune system cell that helps fight infections Continue reading

Making a mental match: Pairing mechanical device with stroke patients

Making a mental match: Pairing mechanical device with stroke patients

The repetitive facilitation exercise (RFE) is one of the most common rehabilitation tactics for stroke patients attempting to regain wrist movement. Stroke hemiparesis individuals are not able to move that part of their body because they cannot create a strong enough neural signal that travels from the brain to the wrist. With RFE, however, patients get a mental boost. Continue reading

Protein’s ‘hands’ enable bacteria to establish infection, research finds

Protein’s ‘hands’ enable bacteria to establish infection, research finds

When it comes to infecting humans and animals, bacteria need a helping hand. Kansas State University biochemists have found the helping hand: groups of tiny protein loops on the surface of cells. These loops are similar to the fingers of a hand, and by observing seven individual loops on the surface of E. Continue reading

Huntington’s disease protein helps wire young brain

Huntington’s disease protein helps wire young brain

The protein that is mutated in Huntington’s disease is critical for wiring the brain in early life, according to a new Duke University study. Huntington’s disease is a progressive neurodegenerative disorder that causes a wide variety of symptoms, such as uncontrolled movements, inability to focus or remember, depression and aggression. By the time these symptoms appear, usually in middle age, the disease has already ravaged the brain. Continue reading

Stem cell type resists chemotherapy drug

Stem cell type resists chemotherapy drug

A new study shows that adipose-derived human stem cells, which can become vital tissues such as bone, may be highly resistant to the common chemotherapy drug methotrexate (MTX). The preliminary finding from lab testing may prove significant because MTX causes bone tissue damage in many patients. MTX is used to treat cancers including acute lymphoblastic leukemia, the most common form of childhood cancer. Continue reading