Hormone News and Research

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A hormone is a chemical released by one or more cells that affects cells in other parts of the organism. Only a small amount of hormone is required to alter cell metabolism. It is essentially a chemical messenger that transports a signal from one cell to another.

Decline in energy production by mitochondria appears to be a key problem leading to insulin resistance

A detectable decline in energy production by mitochondria - the organelles that are the cell's furnace for energy production - seems to be a key problem leading to insulin resistance, and thus to type 2 diabetes, according to studies by Howard Hughes Medical Institute researchers.

16 Aug 2005

Oral medications may control symptoms of Type II diabetes in children just as well as insulin injections

According to the medical records of 26 children diagnosed with the disease, oral medications reduced levels of a compound in the blood called hemoglobin A1C by an average of 2 percentage points.

15 Aug 2005

Effects of estrogen on heart disease prevention

Researchers at Yale School of Medicine and seven other national institutions are recruiting patients to participate in the Kronos Early Estrogen Prevention Study (KEEPS) to look at the effects of estrogen on heart disease prevention.

15 Aug 2005

New study shows testosterone treatment linked to prostate cancer

Researchers in the United States say that prostate cancer developed in 20 men within months to a few years after they began testosterone supplementation, to correct a deficiency of the hormone.

15 Aug 2005

Calcium fights prostate cancer

Calcium, more familiar in its role as one of the building blocks of the body, is being enlisted as a tool in the fight against prostate cancer.

15 Aug 2005

MiRNA is opening up a whole new way of understanding carcinogenesis

Scientists mining vast, largely unexplored regions of the human genome have identified a small handful of mini-molecules that play a major role in the development of cancer and perhaps many other diseases.

15 Aug 2005

Oxytocin and ingestive behavior

More than 15 years ago Edward Stricker and Joseph Verbalis reported that oxytocin (OT) is involved in the neural control of food and salt intake in adult rats. Linda Rinaman at the University of Pittsburgh is investigating the anatomical organization of this system, and also is taking a developmental approach to determine how OT modulates eating and digestion.

11 Aug 2005

Australian scientists rejuvenate the immune systems of mice and humans using a common hormone

The scientists, led by Associate Professor Richard Boyd and Dr Jayne Sutherland from the Monash Immunology and Stem Cell Laboratories, have revitalised the thymus which produces the T cells required to fight infection but which shuts down from early adulthood.

11 Aug 2005

Taking parathyroid hormone followed by a year on alendronate shows strong osteoporosis benefit

Postmenopausal women who took a bone-building drug for one year followed by a year on a standard drug that fights bone loss experienced greater increases in bone density than has been reported from any other drug regimen, an NIH-sponsored study has found. Bone density is the standard predictor of fracture risk associated with osteoporosis.

11 Aug 2005

Cancer causing potential of the sex hormones

The cancer causing potential of the sex hormones used in hormone therapy has been known since the 1930s, say researchers and women's health advocates in the Journal of Epidemiology and Community Health.

11 Aug 2005

Morning after pill - FDA must decide by September

Apparently federal health officials will soon decide whether to allow the sale of emergency contraception without a prescription.

10 Aug 2005

Important breast cancer discovery

Scientists at the McGill University Health Centre (MUHC) have made an important discovery that will advance our understanding of how the female hormone estrogen causes growth of breast cancer cells. The research, in collaboration with scientists at the Institut de Recherches Cliniques de Montreal (IRCM) identifies 153 genes that respond to estrogen and one in particular that can be used to halt the growth of breast cancer cells.

10 Aug 2005

Researchers identify protein called EMP-1 that is present in the tumors of patients who fail to respond to treatment with gefitinib

By the time the human genome was mapped, cancer researchers had already begun investigating the proteins that were encoded by these newly identified genes.

9 Aug 2005

Study results reaffirm cyclin D1 as a candidate target for molecular therapeutic control of breast tumor development

For about a decade, scientists have recognized that many cases of hereditary breast cancer result from a mutation of a specific gene called BRCA1, which, in its normal state, helps keep tumor formation in check. About five to 10 percent of breast cancer cases arise from these genetic miscues, about half of which are linked to the abnormal functioning of BRCA1.

9 Aug 2005

Feeling depressed and fatigued does not increase a person's risk for cancer

...according to a new study. Severely exhausted people, however, do engage in behavior that is associated with a higher cancer risk.

8 Aug 2005

Breastfeeding lowers mothers stress

Moms, want to lower stress? Try breastfeeding. New research from the McGill-affiliated Douglas Hospital Research Centre in Montreal shows mothers who breastfeed respond less to stressful situations than those who bottle-feed their children. These findings suggest these mothers may be better able to care for their children.

7 Aug 2005

New study says HRT risks far lower

Women battling to deal with the miserable effects of the menopause, will be even more confused by the release of a new Australian study, which says that a woman's risk of developing breast cancer after taking hormone replacement therapy (HRT) might be lower than previously thought.

7 Aug 2005

Switching treatment to the drug anastrozole after two years of tamoxifen is beneficial for women with early breast cancer

Switching treatment to the drug anastrozole after two years of tamoxifen can improve eventfree survival for postmenopausal women with early breast cancer, concludes a study in this week’s issue of The Lancet.

4 Aug 2005

Hormone replacement therapy and breast cancer

A woman's risk of developing breast cancer while taking hormone replacement therapy may be lower than we think, suggest researchers in this week’s British Medical journal (BMJ).

4 Aug 2005