Navigation Links
Genetics Of Mental Retardation

A new study published online on August 13 in Nature Genetics by researchers at the University of Washington and The Howard Hughes Medical Institute says that there// are many more causes of mental retardation. An example is the retardation caused by a large deletion in six genes on chromosome 17. The syndrome caused by this condition causes characteristic facial, behavioral, and other physical features that are identical to several other syndromes.

Working with colleagues in the UK and US, the researchers screened 290 children with mental retardation and identified several abnormal genetic events. The researchers were able to pinpoint the region of the specific deletion using NimbleGen's high-resolution CGH microarrays. "The ability of NimbleGen to rapidly generate custom-designed, high-density oligo arrays targeted to the specific chromosomal regions we were interested in provided us the key data in our study," stated Dr. Andrew Sharp, Senior Fellow and Rosetta Fellow of the University of Washington and first author on the paper. "Having these tools in hand gave us, in a single experiment, what would otherwise have taken months of work using conventional methods, and allowed unprecedented insight into the underlying biology and mechanism of genomic disease."

The deletion on chromosome 17 was seen in multiple children. Based on current data, this deletion potentially accounts for ~1% of cases of mental retardation, making it one of the most common genetic causes of mental retardation. The deletion, encompassing several genes, is associated with a region of DNA that is commonly reversed (or inverted) in one in five people of European descent. Intriguingly, this deletion seems to occur preferentially among children of individuals who carry the inversion.

The research was based on the hypothesis that the genome contains hotspots that are prone to instability and thus play a key role in the occurrence of genomic disorders. These hotsp ots are flanked on each side by large, repetitive regions of DNA, termed "segmental duplications". It is because of the repetitive nature of these regions that, during replication, the genome can become "confused" and duplicate, reverse, or delete itself within these regions.

Source: Eurekalert
'"/>




Related medicine news :

1. Genetics and cholesterol levels
2. Genetics helps in attacking cancer
3. Alcoholism Influenced By Both Genetics & Family Environment
4. Genetics linked to leukemia treatment success rate in children
5. Genetics Has A Major Role To Play In Body Shape.
6. Revolution in Genetics to Open Avenues for Treating Cancer
7. Faster way of producing Bird flu vaccine using Reverse Genetics
8. Genetics of Ageing with Preserved Mental Capacity.
9. Generation Scotland To Examine Relation Between Lifestyle, Genetics and Health
10. Genetics Might BE The Basis For Chronic Fatigue Syndrome
11. Personalized Genetics: Unraveling the Secret Code to Good Health.
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:10/13/2017)... ... October 13, 2017 , ... Many families have long-term insurance that covers ... companies have a waiver for care if the client has a cognitive impairment diagnosis. ... pays for care, is often waived, so the benefits from their insurance start immediately,” ...
(Date:10/13/2017)... ... October 13, 2017 , ... Talented host, ... lowdown on sciatica in a new episode of "Success Files," which is an ... and innovation and investigates each subject in-depth with passion and integrity. , Sciatica ...
(Date:10/12/2017)... ... October 12, 2017 , ... CitiDent and San Francisco ... using cutting-edge Oventus O2Vent technology. As many as 18 million Americans are estimated ... in breathing. Oral appliances can offer significant relief to about 75 percent of ...
(Date:10/12/2017)... ... ... Asante, a nationally recognized health system in southern Oregon, ... health joint venture through an agreement, effective October 1, 2017, to create AccentCare ... company with Asante, delivering clinically integrated care, for the past eight years. This ...
(Date:10/12/2017)... ... October 12, 2017 , ... On Saturday, October 21, the Health & ... by Moonlight to raise money for the American Heart Association Heart Walk. Teams of ... will work together to keep their treadmills moving for 5 hours. Treadmills will start ...
Breaking Medicine News(10 mins):
(Date:10/12/2017)... Oct. 12, 2017 West Pharmaceutical Services, ... solutions for injectable drug administration, today announced that it ... opens on Thursday, October 26, 2017, and will follow ... business expectations at 9:00 a.m. Eastern Time. To participate ... (International). The conference ID is 94093362. ...
(Date:10/11/2017)... Oct. 11, 2017  Caris Life Sciences ® , ... the promise of precision medicine, today announced that St. ... Precision Oncology Alliance™ (POA) as its 17 th ... St. Jude Crosson Cancer Institute will help develop standards ... of tumor profiling, making cancer treatment more precise and ...
(Date:10/11/2017)... , Oct. 11, 2017  Hill-Rom Holdings, Inc. ... Aspen Surgical facility in Las Piedras, Puerto ... scalpels and blades. ... that the facility sustained minor structural damage, temporary loss ... Maria. Repairs have been completed, manufacturing operations have resumed, ...
Breaking Medicine Technology: