Tag Archives: Biology-General

Circadian rhythm chaos: a new breast cancer marker.

PubMed.gov Int J Fertil Womens Med. 2001 Sep-Oct;46(5):238-47. Keith LG, Oleszczuk JJ, Laguens M. Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, Illinois, USA. Abstract The most disappointing aspect of breast cancer treatment as a public health issue … Continue reading

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You Are Controlled By Circadian ‘Believe It or Not’

Creative Health Blog Health Education At Creative Health Institute It is now known that the molecular circadian clock can function within a single cell. At the same time, different cells may communicate with each other resulting in a synchronised output … Continue reading

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Get Some Sleep: When shift work disrupts your rest

CNN Health November 23, 2010 An estimated 20 percent of the American workforce does some type of shift work. This doesn’t have to mean working the graveyard shift.  It can mean any work done between 7 p.m. and 7 a.m. … Continue reading

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911weknow.com What do the next few years hold?  DARPA (the research department of the military) is about to sink millions into a program called BioDesign, aiming to eliminate “the randomness of natural evolutionary advancement.” Look at that again and think.  … Continue reading

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Light At Night Linked To Weight Gain Perhaps Due To Shift In Eating Times

Medical News Today October 11, 2010 Researchers from Israel and the USA believe they have found evidence that demonstrates a link between obesity and metabolic disorders and exposure to LAN (light at night) in animal studies. In an article published … Continue reading

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Tick Tock: Rods Help Set Internal Clocks, Johns Hopkins Biologist Says


BALTIMORE, Sept. 16 (AScribe Newswire) — We run our modern lives largely by the clock, from the alarms that startle us out of our slumbers and herald each new workday to the watches and clocks that remind us when it’s time for meals, after-school pick-up and the like.

In addition to those ubiquitous timekeepers, though, we have internal “clocks” that are part of our biological machinery and which help set our circadian rhythms, regulating everything from our sleep-wake cycles to our appetites and hormone levels. Light coming into our brains via our eyes set those clocks, though no one is sure exactly how this happens. Continue reading

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Photoperiodic diapause under the control of circadian clock genes in an insect

7th Space

Most organisms have evolved a circadian clock in order to anticipate daily environmental changes and many of these organisms are also capable of sophisticated measurement of daylength (photoperiodism) that is used to regulate seasonal events such as diapause, migration and polymorphism. It has been generally accepted that the same elements are involved in both circadian (daily) and seasonal (annual) rhythms because both rely upon daily light-dark cycles.

However, as reasonable as this sounds, there remains no conclusive evidence of such a molecular machinery in insects. We have approached this issue by using RNA interference (RNAi) in Riptortus pedestris. Continue reading

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