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:6/23/2017)... ... June 23, 2017 , ... Dr. Ran Y. ... has recently begun offering three new minimally invasive procedures to patients who want ... reducing downtime, Dr. Rubinstein is excited to bring microneedling, microneedling facials, and platelet ...
(Date:6/23/2017)... ... June 23, 2017 , ... Everybody has their own personal preference when ... read it, and some people don't like it at all. FindaTopDoc took a look ... , Erotic literature can give readers a taste of their deepest, darkest fantasies and ...
(Date:6/23/2017)... ... June 23, 2017 , ... The Aesthetic Channel has ... Dr. Talei has come up with a proprietary technique that he calls the ... that have dropped. For all ages, patients can expect to look refreshed, rejuvenated, and ...
(Date:6/23/2017)... ... June 23, 2017 , ... Georgia State University will host ... , The two-day conference is focused on advancing scientific knowledge about the aggressive ... and eliminating racial breast cancer-related disparities. The conference theme is “Illuminating Actionable Biology.” ...
(Date:6/23/2017)... , ... June 23, 2017 , ... MD Now ... This is MD Now’s 28th facility overall and marks the urgent care center's eighth ... one mile North of The Falls shopping mall. The new clinic offers a wide ...
Breaking Medicine News(10 mins):
(Date:6/8/2017)... Texas , June 8, 2017 /PRNewswire/ ... a leading developer and manufacturer of diagnostic ... announced today that Cressey & Company LP ... firm, has completed a growth-focused investment in ... a majority ownership position from selling shareholder, ...
(Date:6/5/2017)... CINCINNATI , June 5, 2017 The ... a brand of Diplomat Pharmacy, Inc. (NYSE: DPLO), has been ... Cincinnati Enquirer . Results are based on ... specializing in organizational health and workplace improvement. The survey measures ... ...
(Date:6/1/2017)... June 1, 2017 Nutriceutical Holdings (NH), parent ... Solutions (VRS), and KD Pharma Group have decided to ... by KD Pharma Group. KD Pharma Group will become ... to acquire the entire company. "We believe ... are committed to growing the NH companies by providing ...
Breaking Medicine Technology: