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Science News Archive August 2005 - Page 7


Page 7 of 15

Nose odors and mouth odors: The brain distinguishes

Researchers found that brain responds differently to odors introduced through the nose versus the mouth, with distinct brain regions activated. The study suggests that olfactory referral illusion is robust and cognitively impenetrable, and may play a role in flavor perception.

SourceCell Press·JournalNeuron·DateAug 17, 2005

Supernova 1987A: Fast forward to the past

Recent Chandra X-ray Observatory observations have given insight into the behavior of the doomed star before it exploded, indicating that the predicted spectacular brightening of the circumstellar ring has begun. The supernova produced a shock wave that rumbled through the cavity, and recent data indicate that this event has started.

SourceChandra X-ray Center·JournalThe Astrophysical Journal Letters·DateAug 17, 2005

Lessons from 2004 point the way in 2008 election

According to Campbell, increased voter turnout was a key factor in the 2004 Republican victory. Nearly 60% of eligible voters participated, with competitive states experiencing higher turnout rates. The study also notes that party polarization and incumbent advantage will play significant roles in the 2008 election.

SourceUniversity at Buffalo·JournalPolitical Science Quarterly·DateAug 17, 2005

Fighting breast cancer

Researchers at Sunnybrook Hospital have developed a unique mouse model that enables scientists to study how breast cancer spreads. By analyzing the genetic makeup of tumour cells, they hope to predict which tumours will metastasize and develop new treatments.

Purdue research shows added calcium benefits women on the pill

A Purdue study found that increasing calcium intake by 200-300mg per day can significantly boost bone mineral density in young women taking oral contraceptives, reducing the risk of osteoporosis. The researchers suggest that this simple change can prevent a significant loss of bone mass, particularly during peak bone development years.

SourcePurdue University·JournalThe Journal of Clinical Endocrinology & Metabolism·DateAug 17, 2005

Researchers make 'embryonic-like' stem cells from umbilical cord blood

A trans-Atlantic team of researchers has successfully created embryonic-like stem cells from umbilical cord blood, a breakthrough that could revolutionize the treatment of serious diseases. The new cell type shares characteristics with both adult and embryonic stem cells, making it an attractive alternative for stem cell therapies.

Gene loss accelerates aging

Researchers have discovered that the loss of the p63 gene accelerates aging in mice, leading to hair loss, reduced fitness and body weight, progressive curvature of the spine, and a shortened lifespan. This study suggests that p63 plays a fundamental role in maintaining health and preventing cancer.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateAug 16, 2005

U of M researchers show that increasing sugar processing in the liver can lower blood sugar

Researchers at the University of Minnesota have found that increasing fructose-2,6-bisphosphate in the liver can decrease blood sugar levels in mice. This process may also lead to weight loss by reducing food intake and increasing energy expenditure. The study's findings could potentially lead to new treatments for diabetes and obesity.

SourceUniversity of Minnesota·JournalCell Metabolism·DateAug 16, 2005

Other highlights in the August 17 JNCI

Researchers found that screen-detected breast cancers tend to have better prognoses than clinically detected ones, but may not lead to lower mortality. Meanwhile, patients on cetuximab therapy are at risk of hypomagnesemia and require magnesium supplementation. Additionally, men with Klinefelter syndrome may be more likely to develop c...

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateAug 16, 2005

Driving metastasis

Researchers found RhoC essential for tumor metastasis, but dispensable for embryonic development and tumor initiation. RhoC-deficient mice display reduced tumor metastasis, lower cell motility, and survival properties in secondary sites.

SourceCold Spring Harbor Laboratory·JournalGenes & Development·DateAug 16, 2005

Weight control protein may yield antiobesity drugs

Researchers found that SH2-B regulates leptin sensitivity, energy balance, and body weight in mice, leading to obesity and metabolic syndrome. The study identifies SH2-B as a critical component in maintaining leptin sensitivity, potentially serving as a therapeutic target for treating obesity and type 2 diabetes

SourceCell Press·JournalCell Metabolism·DateAug 16, 2005