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Idera Pharmaceuticals Announces Efficacy Data For IMO-8400 In Preclinical Models Of Lupus And Psoriasis

Idera Pharmaceuticals, Inc. (NASDAQ: IDRA) today announced data from preclinical studies of IMO-8400, demonstrating a novel mechanism of action that may be applicable to the treatment of systemic lupus erythematosus (SLE) and psoriasis. IMO-8400 is an inhibitor of specific Toll-like receptors (TLRs). The data were presented at the American Association of Immunologists (AAI) meeting being held in Boston, Massachusetts May 4-8, 2012.

“We are encouraged by the preclinical results with IMO-8400 as a novel approach for the treatment of lupus and other autoimmune disorders,” said Sudhir Agrawal, D.Phil., Chairman and Chief Executive Officer. “The dose-dependent protection we see in the lupus-prone mouse model suggests that pharmacologic inhibition of TLR7, 8, and 9 with IMO-8400 may provide a therapeutic strategy to suppress many lupus disease-associated parameters, including autoimmune antibodies, multiple pro-inflammatory serum cytokines, and indicators of kidney damage.”

A characteristic of SLE is the production of antinuclear autoantibodies complexed with self-RNA or -DNA. These abnormal antibodies inappropriately activate TLR7, 8, and 9 and initiate immune responses that damage the body’s own tissues and organs, thereby releasing more self-RNA and DNA. The data presented at AAI demonstrate that inhibition of TLR7, 8 and 9 with IMO-8400 suppressed the cycle between autoimmune antibody production and tissue damage, leading to improved renal function in lupus-prone mice. No treatment-related side effects were observed in the mice from IMO-8400 treatment at the doses employed in the study.

Idera expects to submit an Investigational New Drug application for IMO-8400 to the FDA during the fourth quarter of 2012, and has selected lupus as the initial disease indication for clinical development.

The oral presentation entitled “IMO-8400, a novel TLR7, TLR8 and TLR9 antagonist, inhibits disease development in lupus-prone NZBW/F1 mice” was made on May 5 th. In addition a poster presentation entitled “IMO-8400, a novel TLR7, TLR8, and TLR9 antagonist, inhibits disease development in mouse models of psoriasis” was presented at AAI on May 6 th. In the poster presentation, data demonstrated that IMO-8400 suppressed lesion development and related immunological makers in mouse models of psoriasis.

In addition to the above presentations, a poster presentation entitled “Modification of immune activation in HIV-1 infected humanized mouse model using TLR7/9 antagonists” was given in the Vaccine and Immunotherapy session on Sunday, May 6 th at 2:30 pm by investigators from the Ragon Institute of MIT, Massachusetts General Hospital, and Harvard Medical School in collaboration with Idera Pharmaceuticals.

These presentations are accessible on the Idera Pharmaceuticals website.

Stock quotes in this article: IDRA 

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