Researchers repurpose immune-activating cytokine to fight breast cancer

The most lethal form of breast cancer could have a new treatment option, according to new research out of the Case Comprehensive Cancer Center at Case Western Reserve University School of Medicine. In the Proceedings of the National Academy of Sciences, researchers showed triple-negative breast cancer cells are highly vulnerable to interferon-β - a potent antimicrobial that also activates the immune system. The new study shows interferon-β impairs breast cancer cells' ability to migrate and form tumors. The study also suggests interferon-β treatment could improve outcomes for certain breast cancer patients.

"We demonstrate that interferon-β reverses some of the more aggressive features of triple-negative breast cancer, which are responsible for metastasis and therapy-failure," said Mary Doherty, first author and pathology graduate student at Case Western Reserve School of Medicine. "Moreover, we found that evidence of interferon-β in triple-negative breast cancer tumors correlates with improved patient survival following chemotherapy."

Doherty's advisor, Mark Jackson, PhD, associate professor of pathology and associate director for training and education, Case Comprehensive Cancer Center at Case Western Reserve University School of Medicine, is senior author on the study. The study team also included researchers from Cleveland Clinic Lerner Research Institute, University Hospitals Cleveland Medical Center, Stanford University School of Medicine, and other members of the Case Comprehensive Cancer Center.

Triple-negative breast cancer is one of the deadliest, most aggressive forms of breast cancer. It spreads rapidly and is resistant to many available chemotherapies. Even when therapies appear successful, tumors often recur. Said Doherty, "While chemotherapy kills the majority of tumor cells, it fails to eliminate a sub-set of cancer cells, called cancer stem cells. The survival of these cancer stem cells following therapy is believed to be responsible for therapy failure in patients."

The new study showed interferon-β directly targets cancer stem cells. In laboratory dishes, regular treatments of interferon-β kept triple-negative breast cancer stem cells from migrating--the first step in metastasis. Even two days after stopping treatment, dishes with interferon-β added had approximately half the number of migrating stem cells as controls. Cells exposed to interferon-β also lacked markers characteristic of early tumors and failed to aggregate into tumor-like spheres.

The researchers validated their laboratory findings using a breast cancer tissue database. They found elevated interferon-β levels in breast tissue correlated with extended patient survival and lower cancer recurrence rates. Patients with higher interferon-β levels in their breast tissue were approximately 25 percent less likely to experience a recurrence than those with low levels. The authors concluded that interferon-β plays a "positive, critical role" in triple-negative breast cancer outcomes.

The researchers are now studying how interferon-β may modulate the immune system to carry out its anti-cancer effects. They also plan to conduct clinical trials evaluating interferon-β as a new therapeutic option for triple-negative breast cancer, either alone or in combination with traditional chemotherapy. Such a study could require novel methods to deliver interferon-β to breast cancer tumors. Said Doherty, "Our future studies will examine improved methods of interferon-β delivery to the tumor site incorporating nanoparticle technology." Together, the studies could expand treatment options for patients suffering from drug-resistant breast cancers.

Doherty MR, Cheon H, Junk DJ, Vinayak S, Varadan V, Telli ML, Ford JM, Stark GR, Jackson MW.
Interferon-beta represses cancer stem cell properties in triple-negative breast cancer.
Proc Natl Acad Sci U S A. 2017 Dec 11. pii: 201713728. doi: 10.1073/pnas.1713728114.

Most Popular Now

Novartis rises to second place in 2018 Access to M…

Novartis ranked second in the 2018 Access to Medicine Index (ATMi), up from 3rd place in 2016, in recognition of its long-standing efforts to improve worldwide access to ...

Sanofi builds focus on rare blood disorders and ca…

Some of the most serious unmet patient needs today are in the field of hematology. Rare blood disorders and blood-related cancers continue to be a major focus of research...

MSD is looking for a digital health solution to em…

MSD Lebanon is looking for an external partner to co-create a digital solution that helps oncologists to stay updated with relevant clinical content about cancer. The sol...

FDA approves new treatment for patients with acute…

The U.S. Food and Drug Administration today approved Daurismo (glasdegib) tablets to be used in combination with low-dose cytarabine (LDAC), a type of chemotherapy, for t...

Lilly submits New Drug Application to the FDA for …

Eli Lilly and Company (NYSE: LLY) has announced the submission of a New Drug Application (NDA) to the U.S. Food and Drug Administration (FDA) for lasmiditan for the acute...

Merck and Pfizer provide update on avelumab in pla…

Merck and Pfizer Inc. (NYSE: PFE) today announced that the Phase III JAVELIN Ovarian 200 trial evaluating avelumab* alone or in combination with pegylated liposomal doxor...

New study reveals probiotics do not help children …

Probiotics are a multibillion-dollar industry with marketing claims of being an effective treatment for a multitude of ailments, including diarrhea. However, findings fro...

U.S. FDA approves Larotrectinib, the first TRK inh…

The U.S. Food and Drug Administration (FDA) has approved larotrectinib, the first oral TRK inhibitor, under the brand name Vitrakvi®. The approval is for the treatment of...

FDA approves first treatment for Lambert-Eaton mya…

The U.S. Food and Drug Administration today approved Firdapse (amifampridine) tablets for the treatment of Lambert-Eaton myasthenic syndrome (LEMS) in adults. LEMS is a r...

Bristol-Myers Squibb awards "Golden Tickets…

Bristol-Myers Squibb Company (NYSE: BMY) and LabCentral, an innovative, shared laboratory space designed as a launchpad for life-sciences and biotech startups, today anno...

Alcon to highlight its vision, strategy and benefi…

Alcon, the eye care division of Novartis, will today hold its first Capital Markets Day for investors and analysts in relation to the previously-announced intention of No...

FDA grants breakthrough device designation to arti…

Bayer announced today that the U.S. Food and Drug Administration (FDA) granted Breakthrough Device Designation to the Artificial Intelligence Software for Chronic Thrombo...