Navigation Links
Vitamin D supplementation may delay precocious puberty in girls
Date:6/17/2013

SAN FRANCISCO-- Vitamin D supplementation may help delay early onset of puberty in girls, a new clinical study finds. The results were presented Monday at The Endocrine Society's 95th Annual Meeting in San Francisco.

Among girls, puberty generally begins between the ages of 10 and 14. Boys undergo these changes later, usually between 12 to 16 years of age. Precocious puberty is diagnosed in girls when sexual development begins before the age of 8; in boys, it is diagnosed when these changes occur before age 9.

Recently, medical research has linked vitamin D deficiency to a number of diseases, including cancer, obesity and autoimmune disease. Low vitamin D levels have been found in girls with precocious puberty, as well, although the exact relationship between vitamin D deficiency and early development remains unclear.

To determine how low vitamin D deficiency is related to precocious puberty, investigators in the current study compared blood levels of the vitamin between girls with early and normal development.

They found that girls with precocious puberty were significantly more likely than those with age-appropriate development to have a severe vitamin D deficiency. Among the precocious puberty group, 44 percent had a severe deficiency in vitamin D, compared to 21 percent of the group with age-appropriate physical development.

Additionally, investigators examined the activity of neurons responsible for stimulating the release of a hormone that triggers the ovulation process. Specifically, investigators used the neuron-stimulating compound called N-methyl-D-aspartate, or NMDA, to activate the neurons responsible for releasing gondadotropin-releasing hormone, or GnRH. They found that vitamin D was associated with a suppression of the NMDA-mediated neuronal activities on GnRH neurons.

"If we understand more about the action mechanism of vitamin D on GnRH neuronal activities, we can find a clue to control of precocious puberty using vitamin D or related molecules," said study lead author Min Sun Kim, MD, PhD, assistant professor at Chonbuk National University Medical School in Jeonju, South Korea. "Our results suggest that vitamin D may inhibit early pubertal onset and/or the rapid progression of puberty, at least in part, through the suppression of NMDA-mediated GnRH neuronal excitation in humans."

Study participants included 110 girls between the ages of 7 to 10 years. Seventy-five girls exhibited normal patterns of development, while 35 were classified as having precocious puberty. Investigators used the Tanner scale, which assesses human physical development, to differentiate normal versus precocious pubertal development.

According to Kim, more research, including studies in animal models, is necessary to confirm this project's findings.


'/>"/>

Contact: Jenni Glenn Gingery
jgingery@endocrine.org
301-941-0240
The Endocrine Society
Source:Eurekalert

Related biology news :

1. Clinical trial launches to see whether vitamin D helps treat multiple sclerosis
2. Vitamin D supplements may protect against viral infections during the winter
3. Vitamin D for pregnant women and babies -- how much is enough?
4. Collaborative research team identifies safe upper level for vitamin A consumption for puppies
5. Health benefits of vitamin D dependent on type taken
6. Vitamin D with calcium shown to reduce mortality in elderly
7. 15th Vitamin D Workshop begins tomorrow
8. Link between vitamin C and twins can increase seed production in crops
9. Low vitamin D levels linked to weight gain in some older women
10. Obesity plus low vitamin D may add up to a greater risk of diabetes
11. Scientists confirm existence of vitamin deserts in the ocean
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/14/2017)... 15, 2017  IBM (NYSE: IBM ) is introducing several ... dedicated to developing collaboration between startups and global businesses, taking ... During the event, nine startups will showcase the solutions they ... industries. France is ... with a 30 percent increase in the number of startups ...
(Date:5/6/2017)... -- RAM Group , Singaporean based technology ... biometric authentication based on a novel  quantum-state ... perform biometric authentication. These new sensors are based on a ... Group and its partners. This sensor will have widespread ... security. Ram Group is a next generation sensor ...
(Date:4/17/2017)... Florida , April 17, 2017 NXT-ID, ... technology company, announces the filing of its 2016 Annual Report on ... and Exchange Commission. ... on Form 10-K is available in the Investor Relations section of ... as on the SEC,s website at http://www.sec.gov . ...
Breaking Biology News(10 mins):
(Date:10/9/2017)... ... October 09, 2017 , ... ... of medical marijuana products targeting the needs of consumers who are incorporating medical ... takes place in Phoenix, Arizona. , As operators of two successful Valley dispensaries, ...
(Date:10/7/2017)... ... October 06, 2017 , ... ... advanced instruments and applications consulting for microscopy and surface analysis, Nanoscience Instruments ... consulting, Nanoscience Analytical offers a broad range of contract analysis services for ...
(Date:10/7/2017)... WALTHAM, Mass. , Oct. 6, 2017 /PRNewswire/ ... pioneering work of three scientists, Jacques Dubochet, ... whose breakthrough developments in cryo-electron microscopy ... this technology within the structural biology community. The ... Scientific. Scientists can now routinely produce highly resolved, ...
(Date:10/6/2017)... ... October 06, 2017 , ... On Tuesday, October ... on INSIGhT, the first-ever adaptive clinical trial for glioblastoma (GBM). The featured speaker ... is free and open to the public, but registration is required. , WHAT: ...
Breaking Biology Technology: