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:12/2/2016)... (PRWEB) , ... December 02, 2016 , ... For over twenty-four years, Doctors on ... to help personal injury victims find high quality medical care. When the company started ... area. Fast forward to present day and the now ten-page directory features a vast ...
(Date:12/2/2016)... Raleigh, NC (PRWEB) , ... December 02, 2016 , ... ... the Open Enrollment Period (or Annual Election Period), is ending December 7th. Currently-enrolled Medicare ... plan (Part C) or prescription drug plan (Part D) need to make changes during ...
(Date:12/2/2016)... (PRWEB) , ... December 02, 2016 , ... More than ... and while 84 percent of parents report speaking with their child about sex related ... sexually transmitted diseases. , Mediaplanet is proud to announce the launch of its second ...
(Date:12/2/2016)... ... December 02, 2016 , ... Sourced from the Isbre Springs beneath the ... its unmatched natural purity of just 6 ppm TDS (Total Dissolved Solids) in addition ... has been available in several ShopRite and FoodTown stores in NJ and received rave ...
(Date:12/2/2016)... ... 02, 2016 , ... On November 24th, 2016, Thanksgiving morning, ... different sites throughout Miami-Dade and Broward counties. This is the largest meal delivery ... Thanksgiving morning by putting together individual meals via assembly lines and passing them ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... , Dec 1, 2016 Research ... "Drug Delivery in Cancer - Technologies, Markets and Companies" ... , ... challenge in management of cancer The market value of ... Cancer market estimates from 2015-2025 are given according to organs involved ...
(Date:12/2/2016)... 2016 Around the corners of world, cancer ... habitable land present over earth. Cancer has become one ... a life time this is because of the increasing ... Given the steady increase in global cancer incidence with ... healthcare costs of treatment, there is increasing interest in ...
(Date:12/2/2016)... Dec. 2, 2016 Allergan plc (NYSE: ... information on its previously announced Accelerated Share Repurchase (ASR) Program. ... ... As previously announced, the Company entered into a ... the Company will repurchase $10 billion of its ordinary shares. ...
Breaking Medicine Technology: