phonograft eardrum

PhonoGraft, Harvard’s 3D-Printed Eardrum Graft, Enters Commercial Development

BOSTON/CAMBRIDGE, MASSACHUSSETTS — Advanced through a six-year effort in Harvard University’s translational research environment, a biomimetic hearing-restoration technology invented by a multidisciplinary research team at Harvard’s Wyss Institute for Biologically Inspired EngineeringHarvard John A. Paulson School of Engineering and Applied Sciences (SEAS), and Massachusetts Eye and Ear (MEE), has taken an important step closer to patients.

The PhonoGraft device is a 3D-printed, biocompatible graft that could be implanted to repair a damaged eardrum. If its clinical development is successful, the PhonoGraft technology could mitigate the pain, drainage, and hearing loss associated with ear drum perforations that affect millions of individuals worldwide.

The technology is now entering commercial development. Driven to make their innovations available to patients, entrepreneurial members of the research team launched a startup company, Beacon Bio, with an exclusive license from Harvard’s Office of Technology Development (OTD) to commercialize the PhonoGraft innovations co-owned by Harvard and Mass General Brigham. Beacon Bio was acquired this summer by California-based Desktop Health, a healthcare business within Desktop Metal Inc. that focuses on new 3D printing and biofabrication solutions for personalized medicine. Nicole Black, Ph.D. ’20, who was CEO of Beacon Bio, will continue to lead the platform as Vice President of Biomaterials and Innovation at Desktop Health.

“I am absolutely thrilled to have Beacon Bio become a part of the Desktop Health team, and to see these innovations advance so far from their earliest days in the lab. The general support, manufacturing expertise, and regulatory expertise of an established company will be key to bringing the PhonoGraft platform to patients and to developing a regenerative medicine platform around the technology.”

–Nicole Black, Ph.D.

Black was initially a doctoral student at SEAS, studying materials science and bioengineering in the lab of Jennifer A. Lewis, Sc.D., the Hansjörg Wyss Professor of Biologically Inspired Engineering at SEAS and a Core Faculty member at the Wyss Institute. In developing the technology, the Lewis Lab teamed up with two surgeons at MEE: Aaron Remenschneider, M.D., M.PH., and Elliott Kozin, M.D. Going forward, Lewis, Remenschneider, and Kozin will participate in the scientific advisory board of Desktop Health.

Beacon Bio team 750sm

The PhonoGraft research project was led by Prof. Jennifer Lewis (left); Nicole Black, PhD ’20, shown holding a petri dish with four 3D-printed devices; and MEE surgeons Aaron Remenschneider (front left) and Elliott Kozin (front right). Also pictured: John Rosowski (back left), director of the Wallace Middle-Ear Research Unit at MEE, and Jeffrey Tao Cheng (back right). (Image credit: Wyss Institute and Garyfallia Pagonis.)

The eardrum, or tympanic membrane, is a thin membrane evolved to conduct sound in the ear and serves as a protective barrier against invading pathogens. The eardrum can become perforated by blasts, traumatic injuries, and chronic ear infections. Despite the eardrum’s remarkable self-healing powers, many perforations cannot heal by themselves and require reconstructive “tympanoplasty” procedures in which ear surgeons repair the hole with tissue grafts harvested from the patient. Even with modern techniques, surgical failures are common, making revision surgeries necessary. Additionally, patient-derived tissue grafts have imperfect sound-conducting abilities, as their structure does not match that of the normal eardrum.

The researchers at Harvard and MEE designed the PhonoGraft technology to utilize a novel biomaterial-based approach that guides the regeneration of native eardrum tissue. Its 3D-printed structure mimics the structure of a normal eardrum and effectively stimulates the tissue’s self-healing properties, as demonstrated in animal models. The team believes the PhonoGraft material technology – unlike other methods – could potentially enable permanent repair by first closely mimicking and then restoring the eardrum’s sound-conducting mechanical properties and barrier functions.

[The Boston Marathon bombing in 2013] was really a catalyzing event that prompted us to look more systematically at our surgical techniques, grafting material, and outcomes, which eventually made us focus on improved eardrum grafting materials to promote better healing and hearing outcomes after eardrum repair.

–Aaron Remenschneider, Mass Eye & Ear

**Read the full story on the Wyss Institute website.

 

A video about the technology from the Wyss Institute can be viewed below:

Source: Benjamin Boettner, Harvard’s Wyss Institute


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