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Center for Regenerative Medicine

Don’t Oversize Your Tissue-Engineered Vascular Grafts: Insights for the Translation of New Surgical Technologies
 Don’t Oversize Your Tissue-Engineered Vascular Grafts: Insights for the Translation of New Surgical Technologies 1024 683 Abbie Miller
By: Abbie Miller

Study shows that adoption of a tissue engineered vascular graft technology currently in clinical trials would require a shift in surgical approach. Tissue engineered vascular grafts (TEVGs) are designed to overcome two important problems associated with synthetic conduits used in surgeries for children with congenital heart disease (CHD): the lack of growth potential and the…

Has the Next Generation of Gene Therapy Arrived?
 Has the Next Generation of Gene Therapy Arrived? 1024 683 Wendy Margolin
By: Wendy Margolin

Researchers crack the code to deliver dual gene therapy in preclinical studies – with promises of wider applications. In a gene therapy breakthrough, a Nationwide Children’s Hospital researcher has successfully used an adeno-associated virus (AAV) to introduce two genes into cells with a single vector. Paul Martin, PhD, created a new dual gene vector approach…

Tissue Engineered Trachea: State of the Research
 Tissue Engineered Trachea: State of the Research 150 150 Lauren Dembeck
By: Lauren Dembeck

The promise of tissue-engineered trachea grafts is moving closer to the clinic, as recent preclinical studies have shown successful implantation and neovascularization. Breathing is an essential biological function that provides our bodies with the oxygen necessary for survival. However, most of us rarely think about the biological structures that make it possible. The trachea, commonly…

Tissue Engineering and Fetal Medicine: A New Frontier for Congenital Heart Disease
 Tissue Engineering and Fetal Medicine: A New Frontier for Congenital Heart Disease 1024 575 Abbie Miller
By: Abbie Miller
Fetus in utero receiving valvuloplasty

Procedures that utilize cardiac catheterization to improve fetal heart development are often successful, but they are not without risk. And even if they can successfully prevent the development of single ventricle disease, there is always ongoing heart valve disease (HVD). HVD may not be as life-threatening as single ventricle disease, but it requires lifelong care.…

Researchers Characterize Growth and Remodeling of Tissue-Engineered Blood Vessels
 Researchers Characterize Growth and Remodeling of Tissue-Engineered Blood Vessels 600 400 Lauren Dembeck
By: Lauren Dembeck
Tissue engineered vascular graft

Tissue engineering may soon give babies with congenital heart disease new blood vessels capable of native function and growth.   Major cardiovascular reconstructive operations in babies with congenital heart defects require the use of artificial blood vessels called vascular grafts. Because these grafts are made of man-made materials, the recipients’ tissues eventually begin to outgrow…

Featured Researcher — Mitchel Stacy, PhD
 Featured Researcher — Mitchel Stacy, PhD 150 150 Katie Brind'Amour, PhD, MS, CHES
By: Katie Brind'Amour, PhD, MS, CHES

Mitchel Stacy, PhD, a principal investigator in the Center for Regenerative Medicine at Nationwide Children’s Hospital and assistant professor of Surgery at The Ohio State University, started his education with dietetics in mind. Finding his way instead to nuclear and molecular imaging of cardiovascular diseases, Dr. Stacy’s research blossomed during his postdoctoral fellowship and first…

Growing Opportunities for Tissue Engineering
 Growing Opportunities for Tissue Engineering 150 150 Katie Brind'Amour, PhD, MS, CHES
By: Katie Brind'Amour, PhD, MS, CHES

A new system removes much of the expense and technical challenges surrounding cell seeding of tissue-engineered vascular grafts, making the technology more accessible to patients everywhere. One of the key challenges in congenital heart surgery is that current grafts used to correct heart defects are not living grafts—they don’t grow with the patient or function…

Repeated Injury to Stem Cells Could be a Significant Contributor to Chronic Lung Disease
 Repeated Injury to Stem Cells Could be a Significant Contributor to Chronic Lung Disease 1024 575 Abbie Miller
By: Abbie Miller
Illustration of lungs on blue silhouette of upper chest on black background

A series of experiments shows that biological aging of tracheobronchial stem cells could drive the development of chronic lung disease. In a recent publication in STEM CELLS Translational Medicine (SCTM), researchers showed that repeated injury to epithelial cells in the airway caused biological aging of the stem cells located there. Tracheobronchial stem cells (TSCs) are…

Featured Researcher — Tendy Chiang, MD, FACS
 Featured Researcher — Tendy Chiang, MD, FACS 150 150 Natalie Wilson
By: Natalie Wilson

​​​​​​​Tendy Chiang, MD, FACS is a principal investigator in the Center for Regenerative Medicine at the Abigail Wexner Research Institute at Nationwide Children’s Hospital. His work focuses on understanding how airway tissue repairs and regenerates itself and using that information to design tissue-engineered trachea. Tissue engineering is the process of seeding cells on a biodegradable scaffold or support…

Findings Show TEVG Stenosis Spontaneously Resolves
 Findings Show TEVG Stenosis Spontaneously Resolves 600 400 Katie Brind'Amour, PhD, MS, CHES
By: Katie Brind'Amour, PhD, MS, CHES
Tissue engineered vascular graft

The complication that halted a clinical trial for tissue-engineered vascular grafts for children with congenital heart disease may reverse spontaneously without clinical complications. Based on promising laboratory and animal modeling of a biodegradable scaffold seeded with a patient’s own cells, a clinician-scientist research team now based at Nationwide Children’s Hospital initiated a pediatric tissue engineered…

Uncovering Why Synthetic Tracheal Replacements Fail, and Hints for Success
 Uncovering Why Synthetic Tracheal Replacements Fail, and Hints for Success 1024 575 Kevin Mayhood
By: Kevin Mayhood

“There is no ideal replacement for the trachea,” says Tendy Chiang, MD, a pediatric otolaryngologist and a principal investigator in the Center for Regenerative Medicine in the Abigail Wexner Research Institute (AWRI) at Nationwide Children’s Hospital. “There are many surgical techniques that can manage tracheal defects and disorders, however, for longer-segment defects, they oftentimes require replacement tissue that…

New Application of Nuclear Imaging in the Legs May Enable Early Detection of Cardiovascular Problems
 New Application of Nuclear Imaging in the Legs May Enable Early Detection of Cardiovascular Problems 150 150 Katie Brind'Amour, PhD, MS, CHES
By: Katie Brind'Amour, PhD, MS, CHES

Researchers have used a non-invasive imaging modality to quantify perfusion reserve in specific muscles of the extremities — a novel approach with numerous potential clinical applications Researchers have shown for the first time that SPECT/CT imaging can be used to quantify perfusion reserve of specific muscle groups in the lower limbs, which they directly related…

Using Computer Models to Predict How Tissue Engineered Vascular Grafts Will Work
 Using Computer Models to Predict How Tissue Engineered Vascular Grafts Will Work 150 150 Kevin Mayhood
By: Kevin Mayhood

Model and experimental data strongly suggest testing TEVGs until scaffold has biodegraded Identical tissue engineered vascular grafts (TEVGs) being tested in small-diameter veins and arteries of a mouse model performed well for 12 weeks. At 14 weeks, all TEVGs in the veins continued performing well, but all in the arteries suddenly failed. During their effort to understand…

Why Do Synthetic Tracheal Replacements Fail?
 Why Do Synthetic Tracheal Replacements Fail? 150 150 Lauren Dembeck
By: Lauren Dembeck

Synthetic tracheal replacements experience infectious, inflammatory and mechanical failures. Tracheal defects in children and adults can often be addressed with current surgical techniques. However, when a defect is large, greater than 50% of an adult windpipe or 30% of a pediatric windpipe, few options exist to repair it without donor tissue. For decades, tissue engineers…

From What-if to Widely Available – A Proposed Path for Tissue Engineered Vascular Grafts
 From What-if to Widely Available – A Proposed Path for Tissue Engineered Vascular Grafts 150 150 Abbie Miller
By: Abbie Miller

What if you could utilize tissue engineering, imaging and 3D printing technologies to bring the benefits of a tissue engineered vascular graft to every child who needs one? Children born with a single ventricle heart defect undergo a series of surgeries and procedures to reroute the blood flow through their heart. The Fontan operation is…

Growing Tissue to Help Children With Short Bowel Syndrome
 Growing Tissue to Help Children With Short Bowel Syndrome 1024 575 Kevin Mayhood
By: Kevin Mayhood

Research using a small animal model shows that it matters where in the body the cultured intestine is grown. Researchers at Nationwide Children’s Hospital are hoping to use short bowel syndrome patients’ own cells to grow extra tissue needed for their small intestine to function properly. Using rat models, the team of physician-scientists found that…

Taking Innovation to Heart: Next Gen Interventions in Heart Valve Disease
 Taking Innovation to Heart: Next Gen Interventions in Heart Valve Disease 1024 575 Abbie Miller
By: Abbie Miller

From bioengineers to interventional cardiologists, molecular biologists to cardiothoracic surgeons, experts with diverse backgrounds are focusing on the problem of heart valve disease in children. Heart valve disease affects more than 5 million Americans. And while acquired disease in the adult population certainly accounts for much of this, children with heart valve disease face multiple…

A Narrow Focus: Perfecting Tissue Engineered Vascular Grafts
 A Narrow Focus: Perfecting Tissue Engineered Vascular Grafts 1024 575 Abbie Miller
By: Abbie Miller
image of heart with fontan conduit highlighted

A pair of surgeon-researchers is perfecting tissue engineered vascular grafts through bench, clinical and computational modeling studies.