Calcium News and Research

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Calcium, the most abundant mineral in the body, is found in some foods, added to others, available as a dietary supplement, and present in some medicines (such as antacids). Calcium is required for muscle contraction, blood vessel expansion and contraction, secretion of hormones and enzymes, and transmitting impulses throughout the nervous system. The body strives to maintain constant concentrations of calcium in blood, muscle, and intercellular fluids, though less than <1% of total body calcium is needed to support these functions.

The remaining 99% of the body's calcium supply is stored in the bones and teeth where it supports their structure. Bone itself undergoes continuous remodeling, with constant resorption and deposition of calcium into new bone. The balance between bone resorption and deposition changes with age. Bone formation exceeds resorption in growing children, whereas in early and middle adulthood both processes are relatively equal. In aging adults, particularly among postmenopausal women, bone breakdown exceeds formation, resulting in bone loss that increases the risk of osteoporosis over time.

Huntington's disease problem starts early

The damaging effects of the mutated protein involved in Huntington's disease take place earlier in cell life than previously believed, said researchers from Baylor College of Medicine in Houston in a report that appears in the current edition of the journal Neuron.

10 Jan 2008

Blocking parasites' communication reduces infection

One of the most common human parasites, Toxoplasma gondii, uses a hormone lifted from the plant world to decide when to increase its numbers and when to remain dormant, researchers at Washington University School of Medicine in St. Louis have found.

10 Jan 2008

New mobile video assistance technology to improve the life of older people

We are not getting any younger. As Europe's population grows older, the need for care is growing and we are spending more and more money to get it.

9 Jan 2008

Low blood levels of vitamin D linked to heart attacks and strokes

According to new research people who have low levels of vitamin D in their blood are at an increased risk for heart attack, heart failure and stroke.

7 Jan 2008

Research focuses on basic cellular mechanics that instigate the muscle contractions of labor

In the 21st century, human tissue can be generated from stem cells and severed limbs are successfully reattached, while the physiological processes governing life's most fundamental event, childbirth labor, remain a medical mystery.

4 Jan 2008

Love those eggs and butter?

If you are one of the millions who are determined to start the New Year on a healthy basis it may not be as simple as you think.

3 Jan 2008

Protein a possible key to allergy and asthma control

Activating a protein found on some immune cells seems to halt the cells' typical job of spewing out substances that launch allergic reactions, a study by Johns Hopkins researchers suggests.

3 Jan 2008

Plant constituent with selective effect on cancer cells

The substance wogonin triggers the death program apoptosis in tumor cells, while it has virtually no effect on healthy cells.

18 Dec 2007

Effectiveness and risks of six bisphosphonates for osteoporosis

Many medications reduce the risk of bone fractures in people with osteoporosis, but the most commonly used drugs - bisphosphonates - have not been proven more effective than alternatives, according to a new report funded by the Agency for Healthcare Research and Quality (AHRQ), part of the U.S. Department of Health and Human Services.

18 Dec 2007

Agent orange chemical, dioxin, attacks the mitochondria to cause cancer

Researchers with the University of Pennsylvania School of Veterinary Medicine have demonstrated the process by which the cancer-causing chemical dioxin attacks the cellular machinery, disrupts normal cellular function and ultimately promotes tumor progression.

18 Dec 2007

Study looks at denosumab in preventing bone loss caused by aromatase inhibitors

Denosumab is a new drug being studied to prevent fractures in breast cancer patients receiving hormonal therapy.

17 Dec 2007

Controlling lupus - new drug targets found

Investigators at Hospital for Special Surgery have identified two new targets for drugs aimed at controlling lupus.

17 Dec 2007

Message to the elderly: It's not too late to improve your health through diet and exercise

A new study by a NewYork-Presbyterian Hospital/Weill Cornell Medical Center physician-scientist has an important message for the elderly: It's not too late to improve your health through diet and exercise, even if you've had an unhealthy lifestyle in the past!

14 Dec 2007

Polybrominated diphenyl ethers used as fire retardants could be harmful

Polybrominated diphenyl ethers (PBDEs), chemicals used as fire retardants, can be found in numerous items in the home, such as the television, computer, toaster and the sofa.

10 Dec 2007

Calcium in coronary arteries may be linked to increased risk for heart disease in low-risk women

About 5 percent of women considered low-risk for heart disease by current classification standards have evidence of advanced coronary artery calcium and may be at increased risk for cardiovascular events, according to a report in the December 10/24 issue of Archives of Internal Medicine.

10 Dec 2007

Heartburn during pregnancy

Heartburn symptoms are one of the most commonly reported complaints among pregnant women.

10 Dec 2007

Scientists strike blow in super bugs struggle

Scientists from the University of Manchester have pioneered new ways of tweaking the molecular structure of antibiotics - an innovation that could be crucial in the fight against powerful super bugs.

From The University of Manchester 5 Dec 2007

Pheromones identified that trigger aggression between male mice

A family of proteins commonly found in mouse urine is able to trigger fighting between male mice, a study in the Dec. 6, 2007, issue of Nature has found.

5 Dec 2007

Missing brain protein may be one of the culprits behind autism and other brain disorders

The protein helps synapses develop. Synapses--through which neurons communicate with one other-underlie our ability to learn and remember. Now Li-Huei Tsai, Picower Professor of Neuroscience at MIT, has uncovered an enzyme that is key to that protein's activity.

5 Dec 2007

Scientists develop optical device that allows them to peer through the eyes of a mouse and monitor cells passing in bloodstream

A team of researchers from the Wellman Center for Photomedicine at Massachusetts General Hospital (MGH) and Harvard Medical School (HMS) have developed an optical device that allows them to peer through the eyes of a mouse and monitor the cells passing through its bloodstream.

4 Dec 2007