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Depression Linked to Altered Activity of Circadian Rhythm Gene

By Guest PostNovember 12, 2010Health, Sciencebehavioral cycle, circadian rhythm, clock gene, dementia, depression, humans, insomnia symptoms, james connors, jean philippe gouin, messenger rna, molecular level, mrna

COLUMBUS, Ohio – Depression appears to be associated with a molecular-level disturbance in the body’s 24-hour clock, new research suggests.

Scientists examined genes that regulate circadian rhythm in people with and without a history of depression. As a group, those with a history of depression had a higher level of activity of the so-called Clock gene, which has a role in regulating circadian rhythm, than did people with no mood disorders.

Higher expression levels of this gene suggest something is amiss in the body’s 24-hour biological and behavioral cycle, which could affect sleep patterns and other physiological functions governed by circadian rhythm. Sleep disturbance is a common symptom of depression. (more…)

A River Ran Through It

By Guest PostOctober 17, 2010Nature, Sciencealan tessier, arizona state university, climate change, colorado, colorado river delta, downstream, ecosystems, food chain, grand canyon, humans, irrigation, jacques finlay, john sabo, las vegas, los angeles, minneapolis, Mississippi, new york city, Phoenix, river flows, rivers, sea of cortez, small tributaries, storm floods, streams

About the image: A now dry Colorado River delta branches into the Baja/Sonoran Desert near the Sea of Cortez. Image credit: Pete McBride

Rivers and streams supply the lifeblood to ecosystems across the globe, providing water for drinking and irrigation for humans as well as a wide array of life forms from single-celled organisms up to the fish humans eat.

But humans and nature itself are making it tough on rivers to continue in their central role to support fish species, according to new research by a team of scientists including John Sabo, a biologist at Arizona State University.

Globally, rivers and streams are being drained due to human use and climate change. These and other human impacts alter the natural variability of river flows.

Some affected rivers have dried and no longer run, while others have seen increases in the variability of flows due to storm floods. (more…)

Google turned evil :-)

By ShamsMay 20, 20092 commentsScienceapes, evolutionary history, fossil, Frankfurt, Germany, humans, monkeys

It looks like. With this logo, it says something like this:

‘If you don’t search here, then I am going to jump on you’. 🙂

(more…)

Tag Archives: humans

Depression Linked to Altered Activity of Circadian Rhythm Gene

A River Ran Through It

Google turned evil :-)