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Why people get drowsy and fall asleep, and how caffeine blocks that process

When cells in a certain part of the brain become overworked, a compound in the brain kicks in, telling them to shut down. This causes people to become drowsy and fall asleep. Alter that natural process by adding coffee or tea, and the brain compound – called adenosine – is blocked, and people stay awake.

20 Apr 2005

Enhancing the resources available to low-income, urban African American women could protect against poor health and symptoms of depression

Enhancing the resources available to low-income, urban African American women to make their neighborhoods safer could protect them against poor health and symptoms of depression, says Tulane University School of Public Health and Tropical Medicine community health researcher Adam Becker.

20 Apr 2005

Have a laugh a day, it will do you good !

It used to be an apple a day which kept the doctor away now scientists at University College London have found that being happy might be equally beneficial.

19 Apr 2005

Paramedics need family support services

Support services provided to paramedics should also be made available to their family members if these families are to remain healthy and intact, says a University of Toronto researcher.

19 Apr 2005

Can hospital data detect poor performing doctors?

For over 20 years, routine data sources such as the hospital episode statistics have been widely perceived as being of little value because of problems with completeness and accuracy, and the Department of Health has in the past dismissed their use for identifying poor quality services.

19 Apr 2005

Japanese researchers reverse diabetes

Japanese researchers have successfully reversed a woman’s diabetes by transplanting insulinmaking cells (islets) from a living donor’s pancreas into her, reporting their results in a research letter published online today by The Lancet. This is the first successful operation of its kind using the islets from a living donor.

19 Apr 2005

Alternate view for pathology of Alzheimer's disease

A new paper from researchers at the Case Western Reserve University School of Medicine challenges the classic theory that the nerve tangles seen in the brains of Alzheimer's disease (AD) victims are the cause of the disease, but rather proposes that they are a protective response to the disease. Their paper appears in the April issue of the journal Trends in Molecular Medicine.

19 Apr 2005

Stress can give the immune system a beneficial boost

New research in mice provides more evidence that a brief bout of stress can give the immune system a beneficial boost – under certain conditions.

19 Apr 2005

Link between insomnia and obesity

A possible link between lack of sleep (insomnia) and obesity has been traced to hypocretin/orexin cells in the hypothalamus region of the brain that are easily excited and sensitive to stress, Yale School of Medicine researchers report in the April issue of Cell Metabolism.

13 Apr 2005

Researchers show why mutations in a certain few genes, such as the p53 tumor suppressor gene, are found in different cancers

Scientists have identified some of the first genetic triggers for cancer as mutations in specific oncogenes or tumor suppressor genes. Full-blown tumors and metastatic cancers, however, often exhibit many genetic mutations, sometimes dozens in a given tumor. An important scientific question, and one with significant clinical implications, has been what happens after the initial mutation that leads to dangerous later-stage cancers with multiple damaged genes.

13 Apr 2005

Fish and soy oil help keep hearts healthy

Researchers say that older people who take a daily fish or soy oil supplement can reduce their risk of developing irregular heart rhythm or sudden cardiac death.

12 Apr 2005

Innovation, competitive prices to underpin uptake of diagnostic ultrasound devices

Across Europe, the pricing of ultrasound systems is expected to be central to its uptake. In addition to being competitively priced, products with an emphasis on innovation, user-friendliness, mobility and compactness are also expected to appeal to end-users.

12 Apr 2005

Cardiovascular disease: diet, nutrition and emerging risk factors

Despite improvements in death rates from cardiovascular disease (CVD) around the world, CVD remains a leading cause of death and ill health in the UK, where death rates are amongst the highest in the world. Reducing death rates from this disease remains high on the Government’s agenda, yet attention to the classical risk factors may not provide all the answers.

12 Apr 2005

New blood test improves the ability to diagnose or exclude congestive heart failure

A new blood test that measures a particular marker of cardiac distress can markedly improve the ability to diagnose or exclude congestive heart failure in patients with shortness of breath who come to hospital emergency departments.

11 Apr 2005

Hemodialysis causes antioxidant loss leading to long-term complications

An article published in Hemodialysis International discusses the role of oxidative stress (OS) in dialysis patients, an imbalance which can result in long-term health problems. Potential therapeutic options to restore balance in patients are also reviewed.

10 Apr 2005

Teens feel most stress before HIV-infected parent dies

A UCLA AIDS Institute study has discovered that teens of HIV-infected parents are at the highest risk for depression and self-destructive behavior before their parent's death, not after. Published in the April issue of the Journal of Consulting and Clinical Psychology, the findings emphasize the importance of providing support services to HIV-affected families promptly after a parent's diagnosis and through the subsequent illness — not only after the parent's death.

7 Apr 2005

Post-traumatic stress disorder common among refugees in western countries

Refugees settled in western countries could be about ten times more likely to have posttraumatic stress disorder than general populations in those countries, suggests a study published in this week’s issue of The Lancet.

7 Apr 2005

Depression overtakes back pain for incapacity benefit claims

Common mental disorders, such as depression and anxiety, now account for more incapacity benefit claims than musculoskeletal conditions like low back pain, say researchers in this week’s BMJ.

7 Apr 2005

New technology and treatments for heart and lung patients drive revisions

The process for prioritizing heart and lung transplant candidates and determining the treatments they receive while awaiting donor organs is under review by the International Society for Heart and Lung Transplantation (ISHLT) during its Annual Meeting and Scientific Session this week in Philadelphia.

7 Apr 2005