Navigation Links
Anti-dsDNA, surface-expressed TLR4 and endosomal TLR9 cooperate to exacerbate lupus
Date:6/12/2014

Systemic lupus erythematosus (SLE) is a complicated multifactorial autoimmune disease influenced by many genetic and environmental factors. The hallmark of systemic lupus erythematosus (SLE) is the presence of high levels of anti-double-stranded DNA autoantibody (anti-dsDNA) in sera. In addition, greater infection rates are found in SLE patients and higher morbidity and mortality usually come from bacterial infections. Deciphering interactions between the susceptibility genes and the environmental factors for lupus complex traits is challenging and has resulted in only limited success.

In the June issue of Experimental Biology and Medicine Lee et al, from National Yang-Ming University in Taiwan, studied the role of anti-double stranded DNA (anti-dsDNA) and the Toll-like receptors (TLRs), TLR4 and TLR9, in the pathogenesis of lupus. They prepared transgenic mice carrying the anti-dsDNA transgene and challenged these mice with TLR4 and TLR9 agonists. They demonstrate that in the anti-dsDNA transgenic mice TLR4 and TLR9 are cooperatively linked to Lupus progression.

''Since simultaneous activation of extracellular and intracellular pattern-recognition receptors (PRR) is able to trigger more intense host immune responses, it is really crucial to determine whether co-engagement of extracellular and intracellular PRRs may increase disease severity in lupus,'' said Dr. Kuang-Hui Sun, corresponding author. However, only individual conditional knockout models were used in previous studies to study the roles of TLR4 or TLR9. In addition, intracellular nucleic acid-sensing TLR9 plays either stimulatory or protective roles in different murine lupus models. Therefore, Sun and colleagues injected the ligands of TLR4 and TLR9 into the anti-dsDNA transgenic mice as a new model to investigate whether anti-dsDNA and co-activation of extracellular TLR4 and endosomal TLR9 impacts the pathogenesis of lupus in normal background mice. Their data suggest that, in addition to anti-dsDNA, signaling pathways triggered by simultaneous activation of surface-expressed TLR4 and endosomal TLR9 can promote the progression of SLE. These results suggest that simultaneous targeting of anti-dsDNA, TLR4 and 9 may be a potential therapy for SLE.

Dr. Steven R. Goodman, Editor-in-Chief of Experimental Biology and Medicine, said "These studies in transgenic mice offer new concepts for affecting immune tolerance and reducing SLE disease progression as future therapeutics are developed."


'/>"/>

Contact: Kuang-Hui Sun
khsun@ym.edu.tw
Society for Experimental Biology and Medicine
Source:Eurekalert

Related medicine news :

1. How men and women cooperate
2. Health-care practitioners must cooperate to reduce medication mismanagement, MU expert says
3. EpiCast Report: Systemic Lupus Erythematosus Epidemiology Forecast to 2022
4. Putting Lupus in permanent remission
5. There Will be a Michigan Lupus Foundation Support Group Meeting in Traverse City on Wednesday, November 20th
6. Headaches in lupus patients not linked to disease activity study says
7. Young, black women at highest risk for lupus, suffer more life-threatening complications
8. The Michigan Lupus Foundation Will Be Holding a Lupus Support Group Meeting in Lapeer, MI on October 8th
9. The Michigan Lupus Foundation Will Be Holding a Lupus Support Group Meeting in Livonia on August 21st
10. The Michigan Lupus Foundation Will Be Holding a Lupus Support Group Meeting in Lapeer on Tuesday, August 13th
11. The Michigan Lupus Foundation Will Be Holding a Lupus Support Group in Southfield on Saturday, August 10th
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/25/2016)... ... June 25, 2016 , ... First Choice Emergency Room , ... Sesan Ogunleye, as the Medical Director of its new Mesquite-Samuell Farm facility. , ... our new Mesquite location,” said Dr. James M. Muzzarelli, Executive Medical Director of First ...
(Date:6/25/2016)... (PRWEB) , ... June 25, 2016 , ... ... athletes and non-athletes recover from injury. Recently, he has implemented orthobiologic procedures as ... City area —Johnson is one of the first doctors to perform the treatment. ...
(Date:6/25/2016)... ... June 25, 2016 , ... Conventional wisdom preaches the benefits of moderation, ... the latter, setting the bar too high can result in disappointment, perhaps even self-loathing. ... toward their goal. , Research from PsychTests.com reveals that behind the ...
(Date:6/24/2016)... ... June 24, 2016 , ... Those who have experienced traumatic events may ... to unhealthy avenues, such as drug or alcohol abuse, as a coping mechanism. To ... for healthy coping following a traumatic event. , Trauma sufferers tend to feel a ...
(Date:6/24/2016)... ... 24, 2016 , ... Marcy was in a crisis. Her son James, eight, was out of ... verbally and physically. , “When something upset him, he couldn’t control his emotions,” remembers Marcy. ... throw rocks at my other children and say he was going to kill them. ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 Research ... MEMS Devices Medical Market Analysis 2016 - Forecast to 2022" ... The report contains up to date financial data ... analysis. Assessment of major trends with potential impact on the ... analysis of market segmentation which comprises of sub markets, regional ...
(Date:6/23/2016)... , , , WHEN: ... , , , , LOCATION: , , , Online, with ... , EXPERT PANELISTS:  , , , Frost & Sullivan,s Global Vice ... Senior Industry Analyst, Divyaa Ravishankar and Unmesh Lal, Program Manager , ... industry is witnessing an exceptional era. Several new demand spaces, such ...
(Date:6/23/2016)... June 23, 2016  Guerbet announced today that it ... Supplier Horizon Award . One of 12 ... recognized for its support of Premier members through exceptional ... excellence, and commitment to lower costs. ... recognition of our outstanding customer service from Premier," says ...
Breaking Medicine Technology: