Alpine Immune Sciences’ ALPN-101 Receives FDA Orphan Drug Designations for the Prevention and Treatment of Acute Graft Versus Host Disease

March 18, 2020

Company to Hold Conference Call to Discuss Fourth Quarter and Full Year 2019 Results on March 30, 2020

SEATTLE--(BUSINESS WIRE)-- Alpine Immune Sciences, Inc. (NASDAQ:ALPN) , a leading clinical-stage immunotherapy company focused on developing innovative treatments for cancer and autoimmune/inflammatory diseases, today announced the United States Food and Drug Administration (FDA) has made two orphan drug designations for ALPN-101, Alpine’s first-in-class selective dual T cell costimulation inhibitor, for the prevention and for the treatment of acute GVHD.

“We are pleased to receive these important designations from the FDA in acute GVHD, where current standard therapies remain inadequate to prevent or control the disease,” said Mitchell H. Gold, MD, Executive Chairman and Chief Executive Officer of Alpine. “ALPN-101’s unique mechanism has the potential to serve as a groundbreaking medicine for patients suffering from a range of progressive and devastating autoimmune/inflammatory indications with little or no treatment options available to them today.”

Orphan designation is granted by the FDA Office of Orphan Products Development to advance the evaluation and development of safe and effective therapies for the treatment or prevention of rare diseases or conditions affecting fewer than 200,000 people in the U.S. Under the Orphan Drug Act, the FDA may provide grant funding toward clinical trial costs, tax advantages, FDA user-fee benefits, and seven years of market exclusivity in the U.S. following marketing approval by the FDA. The granting of an orphan designation request does not alter the standard regulatory requirements and process for obtaining marketing approval. For more information about orphan designation, please visit the FDA website at

Fourth Quarter and Full Year 2019 Conference Call and Webcast Details

Alpine will hold a conference call and webcast to discuss results from the fourth quarter and full year 2019 on March 30, 2020 at 4:30 p.m. ET. To access the live call by phone, dial (800) 816-3005 (domestic) or (857) 770-0069 (international) using participant passcode 6877935. To access a live webcast of the call, please visit the Investor Relations section of the Alpine Immune Sciences website at The recorded webcast will be available for replay for approximately 30 days following the call.

About Graft Versus Host Disease (GVHD)

Graft versus host disease (GVHD) is the most common life-threatening complication of a hematopoietic cell transplant. It occurs when donor cells see recipient cells as foreign and attack them. Acute GVHD typically occurs within the early weeks and months after transplant, usually involving the skin, liver, and gastrointestinal tract. GVHD patients remain at risk of organ system damage and increased mortality due to the disease and to high dose glucocorticoids.

About ALPN-101

ALPN-101 is a novel Fc fusion protein of a human inducible T cell costimulator ligand (ICOSL) variant immunoglobulin domain (vIgD™), a first-in-class therapeutic designed to inhibit simultaneously the CD28 and ICOS inflammation pathways. CD28 and ICOS are closely related costimulatory molecules with partially overlapping roles in T cell activation likely playing a role in multiple autoimmune and inflammatory diseases. In preclinical models of graft versus host disease, inflammatory arthritis, connective tissue disease, and multiple sclerosis, ALPN-101 demonstrates efficacy superior to agents blocking the CD28 – CD80/86 and/or ICOS - ICOSL pathways alone.

About Alpine Immune Sciences, Inc.

Alpine Immune Sciences, Inc. is committed to leading a new wave of immune therapeutics, creating potentially powerful multifunctional immunotherapies to improve patients’ lives via unique protein engineering technologies. Alpine has two lead programs. The first, ALPN-101 for autoimmune/inflammatory diseases, is a selective dual T cell costimulation blocker engineered to reduce pathogenic T and B cell immune responses by blocking ICOS and CD28. ALPN-101 has recently completed enrollment in a Phase 1 healthy volunteer trial. The second, ALPN-202 for cancer, is a conditional CD28 costimulator and dual checkpoint inhibitor. Alpine is backed by world-class research and development capabilities, a highly-productive scientific platform, and a proven management team. For more information, visit

Investor Relations:
Pure Communications
Courtney Dugan, 212-257-6723
[email protected]

Media Relations:
Pure Communications
Sheryl Seapy, 213-262-9390
[email protected]

Source: Alpine Immune Sciences, Inc.