bannerHON
img
HONnews
HONnews
img PATIENT / PARTICULIER img PROFESSIONNEL DE SANTE img WEBMESTRE img
img
 
img
HONcode sites
Khresmoi - new !
HONselect
News
Conferences
Images

Themes:
A B C D E F G H I
J K L M N O P Q
R S T U V W X Y Z
Browse archive:
2017: O S A J J M A M F J
2016: D N O

 
  Other news for:
Blindness
Tendon Injuries
Hereditary Diseases
Genetics
Hearing Disorders
Deafness
Parenting
 Resources from HONselect
Scientists Spot Gene for Rare Disorder Causing Deafness, Blindness
Child must inherit genetic mutation from two deaf parents, researchers said

By Robert Preidt

THURSDAY, March 23, 2017 (HealthDay News) -- Researchers say they have found the genetic cause of a rare disorder that causes children to be born with deafness, blindness, albinism and fragile bones.

The syndrome is called COMMAD. It occurs when children inherit two mutations -- one from each parent -- of a gene called MITF. Each parent is also deaf due to another rare genetic disorder called Waardenburg syndrome 2A.

Further research is needed to learn more about the role of MITF during early development and how mutations in this gene result in the development of Waardenburg 2A and COMMAD, said researchers from the U.S. National Eye Institute (NEI).

COMMAD stands for the names of a number of conditions that affect people with this disorder. It includes missing tissue around the eye; abnormally dense bones prone to fracture; small or abnormally formed eyes; an abnormally large head; albinism (lack of melanin in the skin, eyes and hair), and deafness.

Identifying the genetic cause of COMMAD is important because deaf people commonly choose to marry other deaf persons. People who are deaf may not know that their deafness is associated with Waardenburg 2A, the researchers explained.

Deaf couples may want to consider genetic counseling prior to conceiving a child. If both potential parents have Waardenburg 2A, they risk passing mutated versions of MITF to their children, who would then have COMMAD, study lead author Dr. Brian Brooks said in a NEI news release.

Brooks is chief of the NEI's Pediatric, Developmental, and Genetic Ophthalmology section.

The study describes two unrelated cases of children born with COMMAD who inherited the two mutations of MITF from their parents.

Most people who are born deaf don't have Waardenburg 2A. Along with hearing loss, people with the syndrome have premature graying of the hair, blue eyes, fair skin and sometimes vision problems, the researchers said.

The study was published recently in the American Journal of Human Genetics.

More information

The U.S. National Human Genome Research Institute has more on genetic disorders.

SOURCE: U.S. National Eye Institute, news release, February 2017

Copyright © 2017 HealthDay. All rights reserved. URL:http://consumer.healthday.com/Article.asp?AID=720165

Resources from HONselect: HONselect is the HON's medical search engine. It retrieves scientific articles, images, conferences and web sites on the selected subject.
Blindness
Research Personnel
Parents
Eye
Syndrome
Bone and Bones
Hearing
Albinism
The list of medical terms above are retrieved automatically from the article.

Disclaimer: The text presented on this page is not a substitute for professional medical advice. It is for your information only and may not represent your true individual medical situation. Do not hesitate to consult your healthcare provider if you have any questions or concerns. Do not use this information to diagnose or treat a health problem or disease without consulting a qualified healthcare professional.
Be advised that HealthDay articles are derived from various sources and may not reflect your own country regulations. The Health On the Net Foundation does not endorse opinions, products, or services that may appear in HealthDay articles.


Home img About us img MediaCorner img HON newsletter img Site map img Ethical policies img Contact