Vidyya Medical News Service
Volume 6 Issue 228 Published - 14:00 UTC 08:00 EST 15-Aug-2004 Next Update - 14:00 UTC 08:00 EST 16-Aug-2004
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Marijuana ingredient inhibits VEGF pathway required for brain tumor blood vessels
Cannabinoids, the active ingredients in marijuana, restrict the sprouting of blood vessels to brain tumors by inhibiting the expression of genes needed for the production of vascular endothelial growth factor (VEGF).  more

Women who early in life care for elderly parents are at higher risk of poverty later
Taking on the role of caregiver earlier in life can worsen women's economic well-being later in life, according to a study by sociologists at Rice University in Houston.

Using data from the 1992 and 2000 Health and Retirement Study, the researchers analyzed the long-term financial effects of caring for elderly parents.  more

Study indicates why hospitalists improve hospital efficiency
You may not be familiar with the term but you might find yourself being treated by a "hospitalist" -- a physician who devotes all or most of his or her clinical time to the care of certain hospitalized patients. Previous studies have shown that hospitalist services improve efficiency of care by reducing hospital costs and length of stay, without compromising quality or patient satisfaction.  more


Got the time? Development of a molecular timetable by analysis of circadian gene expression
A look inside a wristwatch reveals that timekeeping is a complex affair, involving the coordination of mechanical parts providing the impulses and feedback needed to achieve precisely recurring movement. Biological clocks are equally complex, regulated by a network of genes and transcriptional factors that interact to stabilize the rhythms of numerous physiological systems. Unlike the wristwatch, however, there is no visible readout or display showing an individual's body time, a lack which has stood as one of the major barriers to realizing the promise of chronotherapy, which seeks to deliver drug treatments at optimal body times.  more

Ovarian cancer sheds tumor suppression with loss of estrogen receptor
An important receptor for estrogen in ovarian cells has been shown to suppress tumor growth, according to a new study published in the August 15 issue of the journal Cancer Research. When ovarian tumors develop, however, the number of these receptors--known as estrogen receptor beta (ER beta)--diminishes, encouraging these tumors to advance toward malignancy and metastasis.  more

COPD patients with most severe form more likely to harbor pneumocystis in their lungs
While smoking may be the most common cause of chronic obstructive pulmonary disease (COPD), severity of COPD could be influenced by a common organism that can colonize the lungs without causing outward symptoms, suggests results of a study published in the August 15 issue of the American Journal of Respiratory and Critical Care Medicine, a journal of the American Thoracic Society.  more

Immune vaccine followed by chemotherapy slows incurable brain tumors, lengthens survival
Researchers at Cedars-Sinai's Maxine Dunitz Neurosurgical Institute have found that the combination of immunotherapy and chemotherapy significantly slowed tumor progression and extended survival of patients with glioblastoma multiforme (GBM), extremely aggressive and incurable brain tumors.  more

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