Navigation Links
Room light before bedtime may impact sleep quality, blood pressure and diabetes risk
Date:1/13/2011

Chevy Chase, MDAccording to a recent study accepted for publication in The Endocrine Society's Journal of Clinical Endocrinology & Metabolism (JCEM), exposure to electrical light between dusk and bedtime strongly suppresses melatonin levels and may impact physiologic processes regulated by melatonin signaling, such as sleepiness, thermoregulation, blood pressure and glucose homeostasis.

Melatonin is a hormone produced at night by the pineal gland in the brain. In addition to its role in regulating the sleep-wake cycle, melatonin has been shown to lower blood pressure and body temperature and has also been explored as a treatment option for insomnia, hypertension and cancer. In modern society, people are routinely exposed to electrical lighting during evening hours to partake in work, recreational and social activities. This study sought to understand whether exposure to room light in the late evening may inhibit melatonin production.

"On a daily basis, millions of people choose to keep the lights on prior to bedtime and during the usual hours of sleep," said Joshua Gooley, PhD, of Brigham and Women's Hospital and Harvard Medical School in Boston, Mass. and lead author of the study. "Our study shows that this exposure to indoor light has a strong suppressive effect on the hormone melatonin. This could, in turn, have effects on sleep quality and the body's ability to regulate body temperature, blood pressure and glucose levels."

In this study, researchers evaluated 116 healthy volunteers aged 18-30 years who were exposed to room light or dim light in the eight hours preceding bedtime for five consecutive days. An intravenous catheter was inserted into the forearms of study participants for continuous collection of blood plasma every 30-60 minutes for melatonin measurements. Results showed exposure to room light before bedtime shortened melatonin duration by about 90 minutes when compared to dim light exposure. Furthermore, exposure to room light during the usual hours of sleep suppressed melatonin by greater than 50 percent.

"Given that chronic light suppression of melatonin has been hypothesized to increase relative risk for some types of cancer and that melatonin receptor genes have been linked to type 2 diabetes, our findings could have important health implications for shift workers who are exposed to indoor light at night over the course of many years," said Gooley. "Further research is still needed to both substantiate melatonin suppression as a significant risk factor for breast cancer and determine the mechanisms by which melatonin regulates glucose metabolism."


'/>"/>

Contact: Aaron Lohr
alohr@endo-society.org
240-482-1380
The Endocrine Society
Source:Eurekalert

Related medicine news :

1. ClearWay Minnesota(SM) Shines a Spotlight on a Reinvented Tobacco Industry
2. Cyndi Lauper, Lady Gaga Put Spotlight on Women and HIV
3. Virtual Global Highlights Top Ten Misconceptions about Cloud Computing
4. Research highlights role of protein pair in obesity regulation
5. Highlights of major physics conference in Washington, D.C.
6. Defective signaling pathway sheds light on cystic fibrosis
7. Lack of morning light keeping teenagers up at night
8. Fluorescent probes light up cancerous tumors
9. Lighthouse To Help Relief Efforts In Haiti
10. New Lumension Webcast Highlights Key Steps to Prepare Healthcare Firms and Business Associates to Comply with New HITECH Act
11. Enovate Announces New Lightweight Medication Cart Series
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/28/2016)... of America (PRWEB) , ... May 28, 2016 , ... ... SuperCloset knows all too well the day to day issues, struggles and obstacles veterans’ ... The Helping Veterans Grow Project provides active or retired military veteran(s) with a ...
(Date:5/28/2016)... ... May 28, 2016 , ... After a year and a half of planning the ... extraordinary event. The Multiple Pathways of Recovery Conference was held May 2 -4, 2016 ... and the United Kingdom came together to explore the many pathways individuals use to get ...
(Date:5/27/2016)... ... May 27, 2016 , ... Southland Log Homes ... classic American timber frame barn kits, which can be found on its website at ... historic American barn plans, and they highlight the craftsmanship of timber post and beam ...
(Date:5/27/2016)... New York, NY (PRWEB) , ... May 27, 2016 , ... ... annual campaign returns for a third time to shed lights on the variety of ... resources and inspirational stories, “Nurse Appreciation” tackles why this career has gone from being ...
(Date:5/27/2016)... New York, NY (PRWEB) , ... May 27, ... ... caregivers to casual readers, this installment is bolstered by inspiring human-interest stories, courtesy ... trends and tech within the industry, from leading advocates, associations and industry leaders ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... --   , Study met ... cleansing and superiority in , Excellent ... of the ascending colon   , ... Norgine B.V. today announced new positive data from the phase III ... versus standard 2 litre PEG with ascorbate. The study met both ...
(Date:5/24/2016)... LAWRENCE, Mass. , May 24, 2016  NxStage ... medical technology company focused on advancing renal care, today ... Officer, plans to participate in the following schedule of ... will be made available at http://ir.nxstage.com/ . ... Jefferies Healthcare Conference NY, NY           Friday, ...
(Date:5/24/2016)... , May 24, 2016 ... the world , s first dual ... fistula intervention   OrbusNeich, a global company ... expanded its portfolio to include products to treat peripheral ... the company,s first entry devices for lower limb and ...
Breaking Medicine Technology: