Insulin News and Research

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Insulin is a hormone that is needed to convert glucose, starches and other food into energy needed for daily life. Insulin allows cells to use glucose for fuel and is secreted by beta cells in the islets of Langerhans. The release of insulin from the pancreas is stimulated by increased blood glucose, vagal nerve stimulation, and other factors. Insulin is obtained from various animals and available in a variety of preparations. Commercial insulin preparations differ in a number of ways, including differences in the animal species from which they are obtained; their purity, concentration, and solubility; and the time of onset and duration of their biologic action. An oral hypoglycemic agent is not a form of insulin therapy.

Reduced-calories and exercise can modify a postmenopausal woman's risk of breast cancer

Scientists at the University of Texas at Austin have identified pathways by which a reduced-calorie diet and exercise can modify a postmenopausal woman's risk of breast cancer.

18 Nov 2008

Two common cancer drugs prevent, reverse type 1 diabetes

Two common cancer drugs have been shown to both prevent and reverse type 1 diabetes in a mouse model of the disease, according to research conducted at the University of California, San Francisco.

18 Nov 2008

Why HIV treatment makes people more susceptible to metabolic complications

Clinicians have known for some time that people treated for HIV also become much more susceptible to diabetes and heart disease.

17 Nov 2008

Breakthrough reveals first ever complete structure of a nuclear hormone receptor on human DNA

For decades, scientists have been studying nuclear hormone receptors to gain a better understanding of how they turn genes on and off throughout the body and how they function as key drug targets for a number of diseases, such as diabetes, breast cancer, osteoporosis and high cholesterol. A new UVA Health System study, led by Fraydoon Rastinejad, Ph.D., professor of pharmacology and director of the UVA Center for Molecular Design and published in the October 29 issue of Nature, reveals the first ever complete structure of a nuclear hormone receptor on human DNA – a discovery that now clears a new path for scientists to design more effective drugs with fewer associated health risks. “Dr. Rastinejad’s findings fundamentally change the way people all over the world will study how nuclear hormone receptors work and introduces a new platform for designing better drugs,” says Jim Garrison, Ph.D., professor of pharmacology at UVA Health System. Nuclear hormone receptors, including the peroxisome proliferator-activated receptors (PPARs), are proteins that sit on the surface of cells and bind to specific hormones such as estrogen, progesterone and thyroid hormone. Once the receptor binds to its hormone and its DNA regulatory element, it can cause a number of alterations in the cell, switching genes on and off. These switches control the continual regulation of the metabolic system and reproductive tissues, as well as the development and differentiation of skin, bone and behavioral centers in the brain. “PPARs are widely studied because they regulate the genes that produce fat cells, glucose, insulin, lipids and metabolism,” says Dr. Rastinejad. “That’s what makes them such good drug targets for diseases like diabetes. We can design drugs more rationally to bind to the PPAR nuclear receptor complex to help regulate these functions in the body.” A number of diabetes drugs, called insulin sensitizers, have been developed based on that knowledge, but now that scientists have a clear view into how these receptors bind and what shape they take the door is wide open for the development of better drugs. "After 40 years of nuclear receptor research, we finally can view the first full and complete structure of a nuclear receptor, thanks to Dr. Rastinejad’s break-though achievement,” says Bert W. O’Malley, Ph.D., professor and chairman, Department of Molecular and Cellular Biology at Baylor College of Medicine who is widely considered a top expert in the field.

17 Nov 2008

Study looks at investigational compound MK-677 in Alzheimer's disease

A new study shows that a drug that increases the release of growth hormone failed to slow the rate of progression of Alzheimer's disease in humans.

17 Nov 2008

Pelvic girdle syndrome linked to diabetes

Diabetes appears to be linked with an increased risk of pelvic girdle syndrome. This is shown in a new study from the Norwegian Institute of Public Health and Akershus University Hospital.

16 Nov 2008

Blood levels of resistin a new biomarker for heart failure

Blood levels of resistin, a hormone produced by fat cells, can independently predict an individual's risk of heart failure, cardiologists at Emory University School of Medicine have found.

12 Nov 2008

Discovery of possible link between chronic pancreatitis and liver cirrhosis of alcoholic etiology

Chronic alcoholism is a well-known etiologic factor associated with chronic and irreversible pancreatic and liver disorders.

12 Nov 2008

Neck arteries of obese children and teens look more like those of 45-year-olds

Researchers used ultrasound to measure the thickness of the inner walls of the neck (carotid) arteries that supply blood to the brain. Increasing carotid artery intima-media thickness (CIMT) indicates the fatty buildup of plaque within arteries feeding the heart muscle and the brain, which can lead to heart attack or stroke.

11 Nov 2008

Hispanics less likely to have repeat revascularizations 1 year after angioplasty

Hispanic patients were 57 percent less likely than Caucasian patients to undergo coronary artery bypass surgery (CABG) one year after successful angioplasty, a type of percutaneous coronary intervention (PCI) to open blockages in the coronary arteries.

10 Nov 2008

Sydney student solves piece of the diabetes puzzle

An important piece in the diabetes puzzle which has perplexed scientists for decades has been uncovered by a Sydney PhD student at Sydney's Garvan Institute of Medical Research.

9 Nov 2008

Advances in use of stem cells for tissue regeneration

A major issue in the development of regenerative medicine is the cell sources used to rebuild damaged tissues.

7 Nov 2008

Prevalence of metabolic syndrome and associated risk factors in Illinois

Adopting daily exercise sessions and a calcium-rich diet could reduce the risk of a group of health risk factors called the metabolic syndrome, finds a new study of Illinois adults.

7 Nov 2008

Age, race are among factors that influence carotid-surgery success

Advanced age and race are among the factors that can affect whether a patient dies or suffers a stroke after carotid-artery surgery, a UT Southwestern Medical Center physician involved in a multicenter study has found.

6 Nov 2008

Discovery explains how insulin prompts fat and muscle cells to absorb glucose

A PhD student at Sydney's Garvan Institute of Medical Research has uncovered an important piece in the puzzle of how insulin works, a problem that has plagued researchers for more than 50 years.

6 Nov 2008

Investigational drug, MK-677 shows promise for reducing age-related frailty

Researchers at the University of Virginia Health System report that a daily single oral dose of an investigational drug, MK-677, increased muscle mass in the arms and legs of healthy older adults without serious side effects, suggesting that it may prove safe and effective in reducing age-related frailty.

5 Nov 2008