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Cycling surprises

By | January 5, 2001

Array analysis of dividing cells has been tackled for yeast, but in the January Nature Genetics Cho et al. present the first large-scale analysis in human cells (Nat Genet 2001, 27:48-54). They identify 731 of 40,000 human genes and expressed sequence tags (ESTs) as being cell cycle regulated in primary fibroblasts, and use a functional classification system to identify coordinate regulation of pathways. Notable surprises include upregulation of motility-related genes in G2 (perhaps to prepare d

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Age-related macular degeneration (AMD) is the leading cause of blindness in individuals over 55 years of age in the developed world. AMD affects about 11 million Americans, 5 million of whom have become legally blind because of it. Stargardt's macular degeneration (STGD3) is an early-onset form of AMD that affects about 30,000 children and young adults in the United States. Researchers reported in this week's Nature Genetics that they have identified a gene linked to AMD and predicted the discov

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Have the will, have the data

By | January 5, 2001

Referees on strike, and a new "template" for academic electronic publishing; sound familiar? This time it's economists on the warpath, and they have figures to shoot with.

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New therapeutic signals in asthma

By | January 5, 2001

Blocking IL-5 or adding IL-12 can lower the number of eosinophils in mild asthma but has no effect on hyper-responsiveness.

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The sexually transmitted disease chlamydia has been strongly linked to cervical cancer in a study carried out by scientists in Finland. Chlamydia trachomatis accounted for 24,311 new infections in men and 32,544 in women in 1999. However, because most cases show no symptoms, the actual number could be 90% greater. The study, published in the Journal of the American Medical Association, found that women infected with the chlamydia strain serotype G were nearly seven times more likely to develop c

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Spinal axons regeneration

By | January 5, 2001

Replacing key growth cone components GAP-43 and CAP-23 could be an effective way to stimulate regeneration of spinal axons.

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A reason for neurone death

By | January 4, 2001

Spinal muscular atrophy (SMA) is an inherited disease in which spinal cord neurones die for no known reason. The disease is inevitably fatal in childhood due to an inability to breathe or swallow. Michael Sattler and colleagues from the European Molecular Biology Laboratory in Heidelberg, Germany points out that the neurones' death may be caused only by a change in the binding structure of "survival of motor neurone" (SMN) protein (Nat Struct Biol. 2001 8: 27-31). Researchers identified the thre

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Brain cancer independent of cellular phones

By | January 4, 2001

The use of handheld cellular telephones is not associated with risk of brain cancer according to a paper published in JAMA (JAMA 2000 284:3001-3007).Between 1994 and 1998, Dr Joshua Muscat and colleagues from New York conducted a case-controlled study on the effects of cellular phones in 5 US academic medical centers. They interviewed 469 patients with primary brain cancer and 422 matched controls. They found that the median monthly hours of cellular telephone use was 2.5 for cases, not statisti

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Cosmic radiation and leukaemia

By | January 4, 2001

Deletion or loss of the long arm of chromosome 7 in myelodysplasia and acute myeloid leukaemia could indicate previous exposure to ionising radiation, says Dr Maryanne Gundestrup from the University of Copenhagen (Lancet 2000; 356: 2158). This finding can be used as a marker for an increased risk of acute myeloid leukaemia due to increased exposure to radiation in persons, such as aircrew members exposed to cosmic radiation or patients after radiotherapy. Researchers studied the karyotype of sev

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Stop in the name of ethics

By | January 4, 2001

A French research team is criticised for allowing a clinical trial to continue even though preliminary results suggested the drug therapies were ineffective.

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