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image: Suspected Effects of Vitamin D

Suspected Effects of Vitamin D

By | March 1, 2012

Vitamin D has a variety of actions in the body. It binds to the vitamin D receptor (VDR), which then binds to the retinoid X receptor (RXR) and activates the expression of numerous genes. 

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image: Calcium and the Pancreas

Calcium and the Pancreas

By | February 1, 2012

Normal pancreatic function depends on the precise flow of calcium within and into the acinar cells of the organ. 

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image: Inflammation, Pain, and Resolvins

Inflammation, Pain, and Resolvins

By | January 1, 2012

Not all inflammation leads to pain. Despite widespread infection followed by fever, colds rarely cause pain. But when some cytokines and certain immune cells are active near pain-sensing nerves, they trigger receptors that convey pain sensations to the brain.

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image: Bat Hunt

Bat Hunt

By | January 1, 2012

Bucknell University mammalogist DeeAnn Reeder raises nets high into the darkened forest canopies of South Sudan to catch bats.

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image: Nari's Shark Bite

Nari's Shark Bite

By | December 1, 2011

In February 2009, a bottlenose dolphin named Nari swam up to the Tangalooma Wild Dolphin Resort on Moreton Island off Australia’s Queensland. 

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image: One-Eyed Shark

One-Eyed Shark

By | October 19, 2011

This is not an ancient one-eyed species, but an animal suffering from a rare congenital condition known as cyclopia, which has been documented in a variety of species, including humans. 

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Saving Rwanda's Gorillas

By | October 1, 2011

In late June 2009, a small group of mountain gorillas in Rwanda’s Volcanoes National Park began to fall ill. One by one, 11 of the dozen apes started exhibiting severe respiratory problems. 

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image: Swallowing the Surgeon

Swallowing the Surgeon

By | October 1, 2011

In fewer than 15 years, nanomedicine has gone from fantasy to reality.

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image: The Seat of Memory

The Seat of Memory

By | September 1, 2011

Early on, researchers had learned that the hippocampus was the structure in the brain where long-term memories were created and stored, but it was not known whether the different cell types within this structure might be more or less susceptible to the aging process.

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image: The Cytokine Cycle

The Cytokine Cycle

By | September 1, 2011

The initiating cause of Alzheimer’s disease is still unknown. However, from our studies it’s clear that many types of neuronal damage—­­from traumatic brain injury, to epilepsy, infection, or genetic predisposition—­can activate brain immune cells—microglia and astrocytes-- promoting them to produce IL-1 and S100 inflammatory cytokines.

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