Neuroscience

Scientists study the effect of mutations of Alzheimer's disease

A team of neurobiologists from Peter the Great St. Petersburg Polytechnic University (SPbPU) published an article on their study of the causes of Alzheimer's disease and suggested therapy methods. The scientists believe the ...

Medical research

A new pathway for an anti-aging drug

In 1972, Easter Island, called Rapa Nui, famous for its moai statues, offered a new wonder: the discovery of the drug rapamycin.

Neuroscience

Study reveals how glial cells may play key epilepsy role

A new study provides potential new targets for treating epilepsy and new fundamental insights into the relationship between neurons and their glial "helper" cells. In eLife, scientists at MIT's Picower Institute for Learning ...

Neuroscience

Why you lose hearing for a while after listening to loud sounds

Loud sounds can impair hearing for a short time. Researchers at Linköping University, Sweden, have discovered a mechanism that explains how this happens. Their results are presented in the journal Proceedings of the National ...

Neuroscience

Perilous ruptures described in a multiple sclerosis model

The permanent neurological deficits of multiple sclerosis patients largely depend on the extent of degeneration of long nerve fibers. The latter is initiated by ruptures in the cell membrane and the resulting influx of calcium ...

Alzheimer's disease & dementia

New biomarker for Alzheimer's disease found via CRISPR technique

The objective of the research, undertaken in the laboratories of the IBPM, is to develop a model for studying Alzheimer's disease (AD) of sporadic origin—in other words, AD that is not due to a hereditary genetic mutation. ...

Neuroscience

A docking site per calcium channel cluster

A study co-led by Ryuichi Shigemoto and Alain Marty concludes that a single docking site may use a single cluster of calcium channels, and that both the number of docking sites and the number of calcium clusters change in ...

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Calcium

Calcium (pronounced /ˈkælsiəm/) is the chemical element with the symbol Ca and atomic number 20. It has an atomic mass of 40.078 amu. Calcium is a soft grey alkaline earth metal, and is the fifth most abundant element by mass in the Earth's crust. Calcium is also the fifth most abundant dissolved ion in seawater by both molarity and mass, after sodium, chloride, magnesium, and sulfate.

Calcium is essential for living organisms, particularly in cell physiology, where movement of the calcium ion Ca2+ into and out of the cytoplasm functions as a signal for many cellular processes. As a major material used in mineralization of bones and shells, calcium is the most abundant metal by mass in many animals.

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