Sentences with phrase «human circadian clock»

But after scientists discovered human circadian clock genes in the late 1990s, they found that the genes were expressed in tissues throughout the body.

The discovery opens a window into the genetic basis of the human circadian clock, which keeps body activities such as sleeping and eating on a roughly 24 - hour rhythm.

* Correction, 18 September, 1:03 p.m.: This item has been corrected to reflect that caffeine's effects on the human circadian clock were unknown.

The human circadian clock is a powerful device.

Entrainment of the human circadian clock to the natural light - dark cycle.

Not exact matches

It's a natural phenomenon of the human body clock, one of two daily slumps that are built into our circadian rhythm.

Humans, including baby humans, have an internal body clock called the Circadian Humans, including baby humans, have an internal body clock called the Circadian humans, have an internal body clock called the Circadian rhythm

But showing that circadian clock neurons in fruit flies use external temperature to trigger sleep suggests that some clock neurons in humans could be similarly sensitive.

Humans and fruit flies may have not shared a common ancestor for hundreds of millions of years, but the neurons that govern our circadian clocks are strikingly similar.

These four genes and their proteins constitute the heart of the biological clock in flies, and with some modifications they appear to form a mechanism governing circadian rhythms throughout the animal kingdom, from fish to frogs, mice to humans.

Organisms ranging from bacteria to humans have circadian clocks to help them synchronize their biological activities to the time of day.

Disruption of the circadian clock in humans is a hallmark of relatively recent lifestyle changes involving chronic shift work or frequent flights across time zones.

A study published by Cell Press October 16th in Cell now reveals that gut microbes in mice and humans have circadian rhythms that are controlled by the biological clock of the host in which they reside.

Circadian rhythm explains why, when there is a temporary mismatch between our external environment and our internal biological clocks — like when we travel across several time zones — humans experience «jet lag.»

Blackshaw says scientists have known for a while that the SCN functions as a master clock to synchronize sleep and other so - called circadian rhythms in humans and other mammals.

Mammals, humans included, have circadian clocks that work with the same logic and many of the same gears found in fruit flies, say Jennifer Loros and Jay Dunlap, geneticists at the Geisel School of Medicine at Dartmouth College.

In the original study, Scott Campbell and Patricia Murphy of Cornell University Medical College in New York state reported that by shining light on the backs of the knees of human subjects, they could shift the so - called circadian clock that governs sleep - wake cycles (Science, 16 January 1998, p. 396).

«This study adds to an important body of work that has shown the ubiquity of a circadian clock across species, including humans, and its role in metabolic regulation in cells, organs, and organisms,» said Dr. Michael Sesma, Program Director in the Division of Genetics and Developmental Biology at the of the National Institutes of Health's National Institute of General Medical Sciences, which partially funded the research.

Chronobiology is the discipline that examines these and other questions about the circadian clocks of all living organisms from protozoans to humans.

Circadian clocks are found within microbes and bacteria, plants and insects, animals and humans.

Cyanobacterial clock proteins aren't exactly the same as the clock proteins of animals or human clocks, but proteins serve as the cogs, gears and springs of all circadian clockworks and the overall function of the proteins is similar.

Although caffeine's effects on alertness and sleep are well known, researchers weren't sure how it affects the circadian clock in humans.

Because humans have the «identical circadian clock machinery» as mice, adds Bass, the work has important implications for scientists studying obesity and diabetes in people.

The authors suggest that humans may have internal clocks that track the lunar cycle, much like circadian clocks that sync up with the rise and fall of the sun.

Researchers have identified the first gene involved in the circadian clock of humans.

Humans can overrule their body clocks, but at a price: People whose circadian rhythms are regularly disrupted — by frequent jet lag or shift work, for example — are more vulnerable to diabetes, obesity, cardiovascular disease, and cancer.

«It's the first example of a circadian clock gene in a human,» says Joseph Takahashi, a geneticist at Northwestern University in Evanston, Illinois.

To make the most of the day, humans and other animals evolved roughly 24 - hour internal clocks known as circadian rhythms.

This would have positive impacts on the treatment of circadian clock diseases, sleep problems and human health,» explains Fumika Hamada, PhD, Division of Pediatric Ophthalmology at Cincinnati Children's, one of the study's lead investigators.

Developing biomedical strategies to treat circadian clock disturbances in humans thus rely on diurnal models.

LA JOLLA, CA — Discovering that mouse hair has a circadian clock — a 24 - hour cycle of growth followed by restorative repair — researchers suspect that hair loss in humans from toxic cancer radiotherapy and chemotherapy might be minimized if these treatments are given late in the day.

Virtually every organism on the planet — from bacteria to humans — has a circadian clock, a biological timing mechanism that oscillates with a period of about 24 hours and is coordinated with the cycle of day and night.

The circadian clock in humans has an approximate 24 - hour rhythm, and the circadian rhythm plays an important role in regulating sleep / wake cycles, hormone secretion, and metabolism.

Further investigation showed that DHEA shortens the period of the circadian clock in cultured human cells in a dose dependent manner.

Most organisms on Earth, from bacteria to humans, possess a circadian clock — a biological mechanism that synchronizes activities such as rest or growth to daily...

Can environmental toxins disrupt circadian rhythms — the biological «clock» whose disturbance is linked to chronic inflammation and a host of human disorders?

Most organisms on Earth, from bacteria to humans, possesses a circadian clock — a biological mechanism that synchronizes activities such as rest or growth to daily changes in a 24 - hour day.

Human bodies are governed by a 24 hour cycle called the circadian clock in which we experience periodic dips in alertness — the first one being at 10 am.

Sleeping is an essential human function, and at the heart of it is your circadian rhythm, also known as your body clock.

These results provide additional evidence, from human populations, for a genetic relation between the circadian clock system and metabolic function and the risk of metabolic diseases.

In human populations, genome - wide association studies have revealed associations between variants of the circadian clock — related gene Mntr1b, which encodes melatonin receptor 1B, fasting glucose concentrations, and the risk of type 2 diabetes (12 — 14).