ROCKVILLE, MD, USA I May 5, 2014 I MacroGenics, Inc. (MGNX), a clinical-stage biopharmaceutical company focused on discovering and identifying innovative monoclonal antibody-based therapeutics for the treatment of cancer and autoimmune diseases, today announced the presentation of pre-clinical data on MGD010, a bi-specific Dual-Affinity Re-targeting (DART(R)) protein, demonstrating its ability to inhibit B-cell activation without B-cell depletion, which could provide a novel treatment option for patients with autoimmune disorders. MGD010 also was shown to inhibit the development of graft-versus-host disease in a humanized murine model, a system amenable to ascertain the activity of immunomodulatory intervention. These data were presented at IMMUNOLOGY 2014, the American Association of Immunologists’ Annual Meeting, in Pittsburgh, PA.
MGD010 is designed to interact with B cells in a specific manner by simultaneously targeting CD32B, a key negative regulator of autoimmune response, and CD79B, a B-cell receptor component. MacroGenics believes that MGD010 preferentially blocks activated B cells that promote the autoimmune response.
“Although B cells are known to play a critical role in autoimmune disorders, targeted B-cell treatments have thus far been limited due to a delayed onset of action or an indiscriminate depletion of B cells leading to increased risk of infection,” said Scott Koenig, M.D., Ph.D., President and CEO of MacroGenics. “Here, we demonstrate in pre-clinical models that MGD010 offers a new mechanism of action through its dual-targeting capabilities, resulting in the inhibition of B-cell activation without depleting B cells. Thus, MGD010 represents a promising new potential therapy for autoimmune disorders.”
In the study presented, “Development of human B-lymphocyte targeted bi-specific DART(R) molecules for the treatment of autoimmune disorders,” the key findings below were observed.
- Repeat administration of MGD010 inhibited both humoral immune responses and the development of graft-versus–host disease in a humanized murine model.
- MGD010 inhibited B-cell activation ex vivo in samples from patients with autoimmune disorders.
- MGD010 demonstrated a favorable safety profile, including no cytokine release or B-cell depletion in a non-human primate model.
- MGD010 had prolonged pharmacokinetics, which should support convenient dosing.
Background on DART Platform
MacroGenics’ Dual-Affinity Re-Targeting (DART(R)) platform enables the targeting of multiple antigens or cells by using a single molecule with an antibody-like structure. The Company has created over 100 DART-based molecules, or DARTs, that have been configured for the potential treatment of cancer, autoimmune disorders, and infectious diseases. These DARTs can be tailored for either short or prolonged pharmacokinetics and have demonstrated good stability and attractive manufacturability. The Company has completed in vitro and in vivoproof-of-concept pre-clinical studies with multiple candidates and expects to advance its first two DARTs into clinical development in 2014.
About MacroGenics, Inc.
MacroGenics is a clinical-stage biopharmaceutical company focused on discovering and developing innovative monoclonal antibody-based therapeutics for the treatment of cancer and autoimmune diseases. The company generates its pipeline of product candidates from its proprietary suite of next-generation antibody technology platforms, which it believes improve the performance of monoclonal antibodies and antibody-derived molecules. The company creates both differentiated molecules that are directed to novel cancer targets, as well as “bio-betters,” which are drugs designed to improve upon marketed medicines. The combination of MacroGenics’ technology platforms and antibody engineering expertise has allowed the company to generate promising product candidates and enter into several strategic collaborations with global pharmaceutical and biotechnology companies.
SOURCE: MacroGenics
Post Views: 634
ROCKVILLE, MD, USA I May 5, 2014 I MacroGenics, Inc. (MGNX), a clinical-stage biopharmaceutical company focused on discovering and identifying innovative monoclonal antibody-based therapeutics for the treatment of cancer and autoimmune diseases, today announced the presentation of pre-clinical data on MGD010, a bi-specific Dual-Affinity Re-targeting (DART(R)) protein, demonstrating its ability to inhibit B-cell activation without B-cell depletion, which could provide a novel treatment option for patients with autoimmune disorders. MGD010 also was shown to inhibit the development of graft-versus-host disease in a humanized murine model, a system amenable to ascertain the activity of immunomodulatory intervention. These data were presented at IMMUNOLOGY 2014, the American Association of Immunologists’ Annual Meeting, in Pittsburgh, PA.
MGD010 is designed to interact with B cells in a specific manner by simultaneously targeting CD32B, a key negative regulator of autoimmune response, and CD79B, a B-cell receptor component. MacroGenics believes that MGD010 preferentially blocks activated B cells that promote the autoimmune response.
“Although B cells are known to play a critical role in autoimmune disorders, targeted B-cell treatments have thus far been limited due to a delayed onset of action or an indiscriminate depletion of B cells leading to increased risk of infection,” said Scott Koenig, M.D., Ph.D., President and CEO of MacroGenics. “Here, we demonstrate in pre-clinical models that MGD010 offers a new mechanism of action through its dual-targeting capabilities, resulting in the inhibition of B-cell activation without depleting B cells. Thus, MGD010 represents a promising new potential therapy for autoimmune disorders.”
In the study presented, “Development of human B-lymphocyte targeted bi-specific DART(R) molecules for the treatment of autoimmune disorders,” the key findings below were observed.
- Repeat administration of MGD010 inhibited both humoral immune responses and the development of graft-versus–host disease in a humanized murine model.
- MGD010 inhibited B-cell activation ex vivo in samples from patients with autoimmune disorders.
- MGD010 demonstrated a favorable safety profile, including no cytokine release or B-cell depletion in a non-human primate model.
- MGD010 had prolonged pharmacokinetics, which should support convenient dosing.
Background on DART Platform
MacroGenics’ Dual-Affinity Re-Targeting (DART(R)) platform enables the targeting of multiple antigens or cells by using a single molecule with an antibody-like structure. The Company has created over 100 DART-based molecules, or DARTs, that have been configured for the potential treatment of cancer, autoimmune disorders, and infectious diseases. These DARTs can be tailored for either short or prolonged pharmacokinetics and have demonstrated good stability and attractive manufacturability. The Company has completed in vitro and in vivoproof-of-concept pre-clinical studies with multiple candidates and expects to advance its first two DARTs into clinical development in 2014.
About MacroGenics, Inc.
MacroGenics is a clinical-stage biopharmaceutical company focused on discovering and developing innovative monoclonal antibody-based therapeutics for the treatment of cancer and autoimmune diseases. The company generates its pipeline of product candidates from its proprietary suite of next-generation antibody technology platforms, which it believes improve the performance of monoclonal antibodies and antibody-derived molecules. The company creates both differentiated molecules that are directed to novel cancer targets, as well as “bio-betters,” which are drugs designed to improve upon marketed medicines. The combination of MacroGenics’ technology platforms and antibody engineering expertise has allowed the company to generate promising product candidates and enter into several strategic collaborations with global pharmaceutical and biotechnology companies.
SOURCE: MacroGenics
Post Views: 634
