Navigation Links
Mount Sinai researchers discover mechanism behind development of autoimmune hepatitis
Date:7/23/2013

A gene mutation disrupts the activity of certain immune cells and causes the immune system to erroneously attack the liver, according to a new animal study from the Icahn School of Medicine at Mount Sinai. The findings, published in the Journal of Clinical Investigation, will provide a new model for studying drug targets and therapies for Autoimmune Hepatitis (AIH), a condition for which the only treatment options are short-acting steroids or liver transplant.

T-cells, immune cells created in an organ called the thymus, grow into healthy T-cells with the help of medullary thymic epithelial cells (mTECs). mTECs act as coaches to T-cells to teach them when to attack tissue that might be harmful and when to leave it alone. T-cells that attack healthy body tissue are programmed to die. Led by Konstantina Alexandropoulos, PhD, Associate Professor of Medicine in the Division of Clinical Immunology at Mount Sinai, the research team sought to create a model for understanding why certain immune cells called T-cells inappropriately attack healthy tissues in the body, leading to inflammation and autoimmune diseases like lupus, rheumatoid arthritis, and AIH.

Dr. Alexandropoulos and her team, consisting of Anthony Bonito, first author and PhD candidate at Mount Sinai and contributing author Costica Aloman, PhD, former Assistant Professor of Medicine in the Division of Liver Diseases at Mount Sinai, created mutations in a gene called Traf6 in a mouse model, which caused depletion of mTECs. The research team hypothesized that without mTECs to coach them, T-cells would aberrantly attack healthy cells. Surprisingly, while the depletion of mTECs did cause an autoimmune reaction, the T-cells homed directly to the liver and attacked it rather than other healthy tissue.

"We thought that deleting Traf6 would trigger an autoimmune reaction due to a depletion of mTECs, but did not expect the autoimmune response to be specific to the liver," said Dr. Alexandropoulos. "These findings provide an exciting new animal model to study AIH. We hope that this research will pave the way for new therapies to address a significant unmet need for people with this disease."

Dr. Alexandropoulos and her team hope to identify and study compounds or proteins that prevent the depletion of mTECs using cells from humans with AIH. Mount Sinai has one of the largest cohort of patients in the country to support research on liver diseases such as AIH.


'/>"/>

Contact: Mount Sinai Press Office
newsmedia@mssm.edu
212-241-9200
The Mount Sinai Hospital / Mount Sinai School of Medicine
Source:Eurekalert

Related medicine news :

1. Mountain States Health Alliance Selects BESLER Consulting’s Revenue Recovery Services
2. World-Renowned Gastroenterologist Jean-Frédéric Colombel, MD, Joins the Icahn School of Medicine at Mount Sinai
3. Mesh Lawsuits Involving C.R. Bard, Ethicon Transvaginal Mesh Devices Continue to Mount in New Jersey State Litigation, Bernstein Liebhard LLP Reports
4. Women’s Choice Award® Honors Mount View Care Center As Most Recommended by Women
5. Biomet Hip Lawsuits Mount, as Cases in Federal Litigation Near 500, Bernstein Liebhard LLP Reports
6. The Mount Sinai Medical Center Awarded Advanced Certification as Comprehensive Stroke Center by The Joint Commission
7. Mount Sinai Queens Is Ranked In Top 10 Percent of Hospitals In the U.S. for Adoption of Electronic Medical Records
8. SouthEast Alaska Regional Health Consortium & Mount Edgecumbe Hospital Retain B. E. Smith to Recruit New CNO
9. Kenneth Davis, MD, President and CEO of The Mount Sinai Medical Center, to Speak on the Future of Medicine at the Aspen Ideas Festival in Colorado from June 26th to July 2nd, 2013
10. Mirena Lawsuit News: Bernstein Liebhard LLP Comments on Mounting Reports of Mirena Side Effects, Including Device Migration, Uterine Perforations
11. Mount Sinai Tops the List in New York Magazine’s 2013 “Best Doctors” Issue
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... ... ... Bruton Memorial Library on June 21 due to a possible lice infestation, as reported by ... lice: the parasite’s ability to live away from a human host, and to infest common ... the event that lice have simply gotten out of control. , As lice are a ...
(Date:6/25/2016)... ... 2016 , ... On Friday, June 10, Van Mitchell, Secretary of the Maryland ... iHire in recognition of their exemplary accomplishments in worksite health promotion. , The Wellness ... & Wellness Symposium at the BWI Marriott in Linthicum Heights. iHire was one of ...
(Date:6/24/2016)... ... ... Marcy was in a crisis. Her son James, eight, was out of control. Prone to ... , “When something upset him, he couldn’t control his emotions,” remembers Marcy. “If there ... my other children and say he was going to kill them. If we were ...
(Date:6/24/2016)... ... 24, 2016 , ... Topical BioMedics, Inc, makers of Topricin and MyPainAway Pain Relief Products, join ... wage raise to $12 an hour by 2020 and then adjusting it yearly to increase ... of the minimum wage, assure the wage floor does not erode again, and make future ...
(Date:6/24/2016)... , ... June 24, 2016 , ... ... actively feeding the Frederick area economy by obtaining investment capital for emerging technology ... past 2½ years that have already resulted in more than a million dollars ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... Research and Markets has announced the addition of the ... to their offering. ... World Market for Companion Diagnostics covers the world market for ... report includes the following: , World IVD ... (N. America, EU, ROW), 2015-2020 , World IVD Companion ...
(Date:6/24/2016)...  Arkis BioSciences, a leading innovator in the ... cerebrospinal fluid treatments, today announced it has secured ... led by Innova Memphis, followed by Angel Capital ... Arkis, new financing will accelerate the commercialization of ... of its in-licensed Endexo® technology. ...
(Date:6/23/2016)... , June 23, 2016 ... "Pharmaceutical Excipients Market by Type (Organic Chemical (Sugar, ... Formulation (Oral, Topical, Coating, Parenteral) - Global Forecast to ... The global pharmaceutical excipients market ... at a CAGR of 6.1% in the forecast period ...
Breaking Medicine Technology: