Parthenon Therapeutics Announces Publication in Journal for ImmunoTherapy of Cancer on the Role of Immune Exclusion in Cancer

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Parthenon Therapeutics , a precision oncology company discovering and developing a novel class of therapies that reprogram the tumor microenvironment (TME), today announced that the Journal for ImmunoTherapy of Cancer (JITC) has published results from an international panel of cancer experts convened to provide an initial consensus on the role of immune exclusion in cancer.

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Monday, June 12, 2023
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Science, Biotechnology, Research, Pharmaceutical, Oncology, General Health, Health, Other Health, Paper, Neoplasm, JITC, Therapy, Immunotherapy, Journal, MD, Tumor microenvironment, Parthenon, TME, Vaccine, Cancer
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UNITED STATES, NORTH AMERICA, MASSACHUSETTS, US
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PARTHENON THERAPEUTICS, PRTH-101
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  • Parthenon Therapeutics , a precision oncology company discovering and developing a novel class of therapies that reprogram the tumor microenvironment (TME), today announced that the Journal for ImmunoTherapy of Cancer (JITC) has published results from an international panel of cancer experts convened to provide an initial consensus on the role of immune exclusion in cancer.
  • The article “Developing a Definition of Immune Exclusion in Cancer: Results of a Modified Delphi Workshop,” identifies key characteristics of and issues relevant to the role immune exclusion plays in resistance to checkpoint therapy and is now available online.
  • “Immune exclusion until now has not had a well-defined profile, but we know it exists across multiple tumor types,” said J. Paul Eder, MD, Chief Medical Officer of Parthenon Therapeutics.
  • “In collaboration with academic leaders, Parthenon is pioneering how to recognize and define immune exclusion in cancer and understand the mechanisms underlying it.


Parthenon Therapeutics, a precision oncology company discovering and developing a novel class of therapies that reprogram the tumor microenvironment (TME), today announced that the Journal for ImmunoTherapy of Cancer (JITC) has published results from an international panel of cancer experts convened to provide an initial consensus on the role of immune exclusion in cancer.

The article “Developing a Definition of Immune Exclusion in Cancer: Results of a Modified Delphi Workshop,” identifies key characteristics of and issues relevant to the role immune exclusion plays in resistance to checkpoint therapy and is now available online. The work described in the paper was performed in collaboration with multiple US and international academic institutions.

“Immune exclusion until now has not had a well-defined profile, but we know it exists across multiple tumor types,” said J. Paul Eder, MD, Chief Medical Officer of Parthenon Therapeutics. “In collaboration with academic leaders, Parthenon is pioneering how to recognize and define immune exclusion in cancer and understand the mechanisms underlying it. By modulating the tumor microenvironment and breaking down the barrier that tumors construct to protect them from an immune attack, we think we can overcome immune exclusion and thus, improve patient outcomes.”

Parthenon recently initiated a Phase 1 trial for its lead candidate PRTH-101 first-in-human clinical trial in patients with immune-excluded solid tumors (NCT05753722).

About PRTH-101

PRTH-101 is a therapeutic antibody that specifically binds to and blocks DDR1, a protein expressed on tumor cells that binds collagen to make a minimally permeable physical barrier that blocks immune cells from interacting with and attacking tumor cells. Thus, these “immune cell-excluded” solid tumors are resistant to attack by the immune system (as well as other existing therapies). By disabling DDR1, the collagen fibers lose alignment and loosen, creating gaps in the tumor barrier, thus allowing T-cells to enter and naturally attack the tumor. The creation of DDR1-directed collagen alignment does not appear to have a normal physiological surrogate and may therefore be unique to pathologies such as neoplasia, potentially allowing for relatively safe interventions. Thus, blockade of DDR1 represents a unique and “orthogonal” approach to stimulating the immune-based antitumor activity, and such blockade shows both single agent anti-tumor activity as well as marked augmentation of immunity enhanced by PD-1 blockade.

Tumor types which show particularly high levels of DDR1-associated collagen barriers include colorectal, ovarian, and non-small cell lung cancer. Currently, there are no approved drugs that target DDR1.

About Parthenon Therapeutics

Parthenon Therapeutics is discovering and developing a novel class of anti-cancer therapies that reprogram the tumor microenvironment (TME). Recent research has shown that the interplay of many cancers and their TME results in the creation of unique, non-physiologic barriers that markedly attenuate immune system attack. One approach utilized by PRTH-101 is to break down these barriers to overcome recalcitrant cancers. Based on rigorous, groundbreaking research, Parthenon is developing a portfolio of drug candidates to treat selected patients at the appropriate/ideal stage in disease progression. For more information visit parthenontx.com and LinkedIn.

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