10 specific recommendations offered

A survey of mothers in the January issue of Pediatrics found that physicians remain overwhelmingly negative in communicating a diagnosis of Down syndrome in newborn infants. Mothers reported that the majority of physicians were uninformed about the positive potential for children with Down syndrome, and rarely provided an adequate, up-to-date description of the children, printed information, or telephone numbers of other parents. By nearly all

Triple-drug antiretroviral regimens that are widely used in the United States and Europe against one HIV-1 subtype appear to be effective in South African patients infected with a different HIV-1 subtype who also have tuberculosis (TB) or Kaposi’s sarcoma (KS), according to a study published in the Feb.1 issue of The Journal of Infectious Diseases, now available online. The South African subtype, known as subtype C, is rapidly spreading in developing countries, where TB and KS are major factors

Researchers at Johns Hopkins have determined that in people age 55 to 75, a moderate program of physical exercise can significantly offset the potentially deadly mix of risk factors for heart disease and diabetes known as the metabolic syndrome. More specifically, the researchers found that exercise improved overall fitness, but the 23 percent fewer cases were more strongly linked to reductions in total and abdominal body fat and increases in muscle leanness, rather than improved fitness.

Study published in Dec. 30 Issue of NEJM

Results from two concurrent, prospective, double-blind, multi-center clinical trials show that pegaptanib (Macugen), an anti-vascular endothelial growth factor therapy, is an effective treatment for neovascular age-related macular degeneration (AMD), according to a paper in the Dec. 30 issue of the New England Journal of Medicine. Macugen was approved by the Food and Drug Administration on Dec. 17.

AMD is the leading cause of irr

Study may revise clinical approach to invasive lobular breast carcinoma

Women with a rare type of advanced breast cancer who do not benefit from primary (pre-surgical) chemotherapy still have been found to do better in the long run than patients with a more common advanced breast cancer who do respond to chemotherapy.
Researchers at The University of Texas M. D. Anderson Cancer Center came to the surprising conclusion after discovering that chemotherapy response did not seem

Prostate cancer patients with high risk cancers who are treated with both internal and external radiation and hormone treatment have a better chance of beating the disease than patients treated with radiation alone, according to a new study published in the January 1, 2005, issue of the International Journal of Radiation Oncology*Biology*Physics, the official journal of ASTRO, the American Society for Therapeutic Radiology and Oncology.

Since the late 1980s, doctors have been inc

May help decipher regulator proteins’ roles in cell differentiation, cancer, and more

Finding out where gene-regulator proteins bind to DNA and identifying the genes they regulate just got a step easier thanks to a new technique developed by scientists at the U.S. Department of Energy’s Brookhaven National Laboratory. The technique could greatly speed the process of unraveling the role these proteins play in turning on and off the genes that establish the very identity of cells —

An Oregon Health & Science University-led development of a technique for identifying control elements that drive the expression of genes in brain cells could unleash the disease-fighting potential of the much-hailed human genome.

Scientists at the OHSU Vollum Institute, which headed the multidisciplinary study appearing in the Dec. 29 edition of the journal Cell, are calling the approach a significant advance in understanding the genome. The Vollum’s director, Richard Goodman,

The genes that regulate brain development and function evolved much more rapidly in humans than in nonhuman primates and other mammals because of natural selection processes unique to the human lineage. Researchers reported their findings in the cover article of the Dec. 29, 2004, issue of the journal Cell.

“Humans evolved their cognitive abilities not due to a few accidental mutations, but rather, from an enormous number of mutations acquired though exceptionally intense sel

This week, researchers report new findings that elucidate the role of NOD2, a key molecular player in Crohn’s Disease, in the cellular signaling pathways that control inflammatory responses. NOD2’s clinical relevance is clear from the fact that it is encoded by a Crohn’s Disease susceptibility gene. Understanding NOD2 has posed a particularly intriguing challenge for researchers because it appears able to somehow both activate and inhibit inflammatory cytokine responses in the

Findings reported this week reveal how an evolutionary innovation involving the sharing of genes between two ant species has given rise to a deep-seated dependency between them for the survival of both species populations. The new work illustrates how genetic exchange through interbreeding between two species can give rise to a system of interdependence at a high level of biological organization–in this case, the production of worker ants for both species.

Millions of years befor

Ubiquitination protects against improper Notch signaling

The Notch pathway is an important molecular signaling mechanism whose existence has been known, or at least hinted at, for nearly a century since the identification of a mutant strain of Drosophila fruit flies with “notched” wings in Thomas Hunt Morgan’s lab in 1910. Later studies revealed that the Notch gene encodes a receptor protein that extends through both sides of the cell membrane and which is capable of interac

Genes that control the size and complexity of the brain have undergone much more rapid evolution in humans than in non-human primates or other mammals, according to a new study by Howard Hughes Medical Institute researchers.

The accelerated evolution of these genes in the human lineage was apparently driven by strong selection. In the ancestors of humans, having bigger and more complex brains appears to have carried a particularly large advantage, much more so than for other ma

New study shows animals experience severe stress response at slightest contact with researchers

Mice, rabbits, rats, beagles, geese, and other animals all show measurable physiological stress responses to routine laboratory procedures that have been up until now viewed as relatively benign. The findings come in a new report published in Contemporary Topics in Laboratory Animal Science, based on an extensive review of the scientific literature by ethologist Jonathan Balcombe, Ph.

Scientists have identified genes that promote the growth and recurrence of skin cancer

Dr. Andrzej Dlugosz and colleagues at the University of Michigan and the National Cancer Institute have examined the functions of the Hedgehog (Hh) signaling pathway in basal cell carcinoma, the most common form of cancer, and have uncovered a subset of tumor cells that are resistant to inhibition of the Hh pathway. This new finding has important implications for the treatment of this widesprea

Individuals with either calcium oxalate or calcium phosphate kidney stones should not take extra calcium on their own as suggested by previous research, but should check with their doctors to determine the dietary guidelines that work best for them, researchers at UT Southwestern Medical Center at Dallas have found.

Articles published by UT Southwestern researchers in the November issue of Kidney International and the December issue of the Journal of Urology showed that urinary c