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:2/5/2016)... ... February 05, 2016 , ... Health and wellness is a topic that ... the event they are experiencing an illness. Migraines are a severe form of a ... with migraines would not wish the pain on their worst enemy, the feeling can ...
(Date:2/5/2016)... (PRWEB) , ... February 05, 2016 , ... ... Care for Patients with Rare Diseases, a continuing medical education (CME) event presented ... the first of its kind—and a first for ACCORD, whose mission is to ...
(Date:2/5/2016)... ... 2016 , ... KICVentures ( http://www.kicventures.com ) announced today that ... York City on Thursday, January 21, 2016. Kingsley R. Chin, the CEO ... the varsity Columbia soccer program) spoke at the event, offering professional insight based ...
(Date:2/5/2016)... ... February 05, 2016 , ... Susan Polk Health Insurance Company ... users can expect to see in 2016. To view the report, see below, or ... directly impact many San Luis Obispo seniors who rely on Medicare health insurance and ...
(Date:2/4/2016)... ... February 04, 2016 , ... Dr. Carol Francis and 30 ... 19-21, 2016, in Southern California . The International Hypnosis Federation 2016 Conference "It's ... speakers, including Clinical Psychologist and Hypnotherapist Dr. Carol Francis (topics and ...
Breaking Medicine News(10 mins):
(Date:2/5/2016)... -- Patients in Alabama seeking prostate care ... longer have to travel out of state. Vituro Health ... Centers of Alabama to provide a total prostate management ... Alabama is known throughout ... cancer using many different modalities. They are the largest and ...
(Date:2/5/2016)... 5, 2016 Aethlon Medical, Inc. (Nasdaq: AEMD ... CEO, will be presenting at Source Capital Group,s 2016 Disruptive ... at 2:15 p.m. ET on Wednesday, February 10, ... discussion taking place at 3:15 p.m. ET. http://www.aethlonmedical.com ... hour after the conclusion of the live event. The panel ...
(Date:2/5/2016)... BEIJING , Feb. 5, 2016 ... ("Dehaier Medical" or the "Company"), which develops, markets ... products in China and ... restructuring plan which aims to concentrate the Company,s ... wearable sleep respiratory business and to focus more ...
Breaking Medicine Technology: