Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers identify second gene responsible for rare syndrome associated with skeletal defects

18.08.2003


UT Southwestern Medical Center at Dallas researchers have discovered a second gene responsible for a rare syndrome that causes the loss of bone from the lower jaw, fingers, toes and collarbone.



The researchers isolated the gene, zinc metalloproteinase (ZMPSTE24), in a patient who had all of the classic characteristics of mandibuloacral dysplasia (MAD) but did not have a mutation in the LMNA gene, previously reported as a cause of the disorder.

In addition to causing MAD, mutations in this newly discovered gene may also lead to progeroid features, or premature aging, generalized loss of body fat and early death, the researchers report. The study appears in today’s publication of the journal Human Molecular Genetics and also is available online.


"It was known that a mutation in LMNA caused MAD, but in several of the individuals that we studied LMNA was normal," said Dr. Abhimanyu Garg, professor of internal medicine and the study’s senior author. "This led us to look at other genes that were associated with lamin A production. We considered ZMPSTE24 as a candidate gene based on recent reports that deletion of this gene in mice resulted in the development of similar physical features of the human form of MAD."

The LMNA gene encodes two proteins, lamin A and lamin C, which are components of the membrane of the cell nucleus. The zinc metalloproteinase enzyme is essential for producing the active form of lamin A. Besides MAD, LMNA mutations are linked to several conditions including a body-fat disorder called familial partial lipodystrophy, muscular dystrophy, cardiomyopathy and a premature aging disorder called progeria.

"It is likely that minor changes in these genes may predispose individuals to premature aging, a change of body-fat distribution, as well as osteoporosis," said Dr. Garg.

The researchers studied six individuals with MAD and found a mutation in LMNA in two. Of the remaining four individuals, who did not have a mutation in the LMNA gene, one was found to have mutations in ZMPSTE24. Dr. Garg is currently searching for mutations in other genes that are involved in processing of lamin A in three of the patients who did not have mutations in either LMNA or ZMPSTE24.


Other researchers contributing to the study were Dr. Anil Agarwal, assistant professor of internal medicine and lead author of the study, and Dr. Richard Auchus, assistant professor of internal medicine, both from UT Southwestern; and a scientist from the University Hospital of Leuven in Belgium.

The study was funded by the National Institutes of Health and Southwestern Medical Foundation.

Amy Shields | EurekAlert!
Further information:
http://www.swmed.edu/

More articles from Health and Medicine:

nachricht TSRI researchers develop new method to 'fingerprint' HIV
29.03.2017 | Scripps Research Institute

nachricht Periodic ventilation keeps more pollen out than tilted-open windows
29.03.2017 | Technische Universität München

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: A Challenging European Research Project to Develop New Tiny Microscopes

The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.

To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...

Im Focus: Giant Magnetic Fields in the Universe

Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.

The results will be published on March 22 in the journal „Astronomy & Astrophysics“.

Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...

Im Focus: Tracing down linear ubiquitination

Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.

Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...

Im Focus: Perovskite edges can be tuned for optoelectronic performance

Layered 2D material improves efficiency for solar cells and LEDs

In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...

Im Focus: Polymer-coated silicon nanosheets as alternative to graphene: A perfect team for nanoelectronics

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.

Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

International Land Use Symposium ILUS 2017: Call for Abstracts and Registration open

20.03.2017 | Event News

CONNECT 2017: International congress on connective tissue

14.03.2017 | Event News

ICTM Conference: Turbine Construction between Big Data and Additive Manufacturing

07.03.2017 | Event News

 
Latest News

Researchers shoot for success with simulations of laser pulse-material interactions

29.03.2017 | Materials Sciences

Igniting a solar flare in the corona with lower-atmosphere kindling

29.03.2017 | Physics and Astronomy

As sea level rises, much of Honolulu and Waikiki vulnerable to groundwater inundation

29.03.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>