Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Abnormal 'editing' of gene messages may be a cause of lupus

21.05.2008
Researchers at Wake Forest University have uncovered evidence that the abnormal “editing” of gene messages in a type of white blood cell may be behind the development of lupus. Scientists hope the finding will lead to earlier diagnosis, a way to monitor patients’ response to therapy and possibly a new way to treat the disease.

The findings, reported online in the journal Immunology, involve an enzyme that “edits” and modifies the messages of genes before the protein-making process. It is protein molecules that carry out the instructions of our genes and determine how an organism looks, how well its body metabolizes food or fights infection, and even how it behaves.

Dama Laxminarayana, Ph.D., assistant professor of internal medicine and senior author, said that in systemic lupus erythematosus, the normal editing process goes awry, causing a shift in the balance of proteins that results in impaired functions in T cells, a type of white blood cell involved in the regulation of immune functions.

Impaired T cell function is a hallmark of lupus, a complex chronic autoimmune disorder that can range from a benign skin disorder to severe, life-threatening multisystem disease. It primarily affects women in the child-bearing years and is more common in blacks.

... more about:
»150-kDa »ADAR1 »Laxminarayana »Lupus »cause »enzyme »involved

The current research, which involved 13 patients with lupus and eight healthy participants, was based on Laxminarayana’s earlier findings that 150-kDa ADAR1, one of the three enzymes involved in editing gene messages, is higher in the T cells of lupus patients compared to those without lupus. ADARs are ademosine deaminases that act on RNA.

Laxminarayana made the initial finding about 150-kDa ADAR1 levels in 2002 and has been working to solve the mystery of how it is related to the development of lupus. In the current study, Laxminarayana found that the higher levels of 150-kDa ADAR1 alters the editing induced by two other ADAR enzymes and may cause an imbalance of proteins. Editing by the two other ADAR enzymes is a normal cellular process; it is 150-kDa ADAR1 that causes normal editing to go awry.

The process is complicated and took Laxminarayana years to uncover. The current studies demonstrate that, essentially, too much 150-kDa ADAR1 results in an increase in the gene message of Phosphodiesterase 8A1 (PDE8A1), which is involved in the disruption of normal cell signaling and impairing cell function.

“150-kDa ADAR1 is the culprit,” Laxminarayana said. “We are now working to find a safe way to block it.”

In addition to targeting the enzyme as a treatment strategy, Laxminarayana said 150-kDa ADAR1 could also be used as a biomarker to detect the disease earlier, to monitor how patients respond to therapy, and to measure disease intensity.

Karen Richardson | EurekAlert!
Further information:
http://www.wfubmc.edu

Further reports about: 150-kDa ADAR1 Laxminarayana Lupus cause enzyme involved

More articles from Life Sciences:

nachricht Newly designed molecule binds nitrogen
23.02.2018 | Julius-Maximilians-Universität Würzburg

nachricht Atomic Design by Water
23.02.2018 | Max-Planck-Institut für Eisenforschung GmbH

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Attoseconds break into atomic interior

A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.

In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...

Im Focus: Good vibrations feel the force

A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.

By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...

Im Focus: Developing reliable quantum computers

International research team makes important step on the path to solving certification problems

Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...

Im Focus: In best circles: First integrated circuit from self-assembled polymer

For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.

In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...

Im Focus: Demonstration of a single molecule piezoelectric effect

Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale

Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

2nd International Conference on High Temperature Shape Memory Alloys (HTSMAs)

15.02.2018 | Event News

Aachen DC Grid Summit 2018

13.02.2018 | Event News

How Global Climate Policy Can Learn from the Energy Transition

12.02.2018 | Event News

 
Latest News

Basque researchers turn light upside down

23.02.2018 | Physics and Astronomy

Finnish research group discovers a new immune system regulator

23.02.2018 | Health and Medicine

Attoseconds break into atomic interior

23.02.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>