Full text of biomedical scientist Georgina Ellison-Hughes’ talk titled “What Becomes Of The Broken Hearted: Rejuvenating Hearts” at TEDxRoyalTunbridgeWells conference. In this talk, she offers a personal touch to her journey of discovering the regenerative potential of the adult heart and describes the use of senolytics to rejuvenate heart repair and regeneration, enabling people to live longer, fuller, healthier lives.
Georgina Ellison-Hughes – Biomedical scientist
My first love was my grandfather. He was the kindest, most generous and loving man, and my brother and sisters used to say that I was his favorite.
He suffered a fatal heart attack at the age of 79 when I was 16, and I was mortified. At the time, my mother told me that he died because it was his age, he was old, and he had a bad heart and it just couldn’t hold out any longer. And the classic that you always hear: ‘He had a good innings.’
My heart hurt.
Like his grandfather, my grandfather would have liked me to have gone into law. He was so proud that out of seven grandchildren, I was the one to be the lawyer. His favorite, the lawyer.
I liked the idea. But after his death, I had other ideas. I had many questions. I wanted to understand, why couldn’t his heart hold out any longer, and what role does age play in the health of our hearts?
What if we could have a better and longer innings? If I could find out the answers to my questions, I could stop grandfathers and grandmothers being taken away from us too soon.
I wanted to be a scientist. So my journey began with a PhD sponsored by the British Heart Foundation, and it was during this time that I discovered something remarkable.
So rather than cardiac or heart muscle, it all started with skeletal muscle, which are the muscles that allow us to move. I was investigating the ability of skeletal muscle to repair and regenerate and form new muscle cells after injury.
With a microscope, I was identifying these small, immature regenerating muscle cells that express proteins that were reflective of them being newly born or newly formed, and they look like this.
Now, switching to the heart, which, at this time, which was 2002, was considered to be a postmitotic organ. Now, this means that your heart doesn’t have any abilities to make new heart muscle cells. So the heart cells you’re born with are the same ones that you are going to die with.
At this time, it was thought there was no heart muscle cell regeneration or renewal taking place in the adult heart.
So in every experiment, you need a control sample, a sample where you do not expect anything to happen, and then you compare to the sample where you do expect something to happen to your control sample.
So my PhD supervisor advised me to use heart tissue in my experiments as my control sample, because the heart cannot make new heart muscle cells, so I did.
I did my experiment. But every time I did my experiment, I kept seeing these small, immature, regenerating muscle cells that express those same proteins, and they look like this.
So I went to my PhD supervisor. He told me to repeat the experiment, so I did.
And being a scientist, I repeated the experiment many, many, many, many times, but I just kept seeing them, they just kept popping up. I mean there wasn’t loads of them, but there was like one or two of them per field of view, and hey, for an organ that can’t regenerate, there’s definitely something going on here.
So I went to literature and I did some reading, and I read a paper that had been published by a group in America, where they have showed these small, immature, regenerating heart muscle cells in the adult human heart after injury.