Dr. Augusto Zani: Decoding Pulmonary Exacerbations Through Tiny Cellular Messages

In the world of cystic fibrosis (CF) research, some of the most exciting discoveries are happening at the microscopic level. Dr. Augusto Zani, a Clinician-Scientist at SickKids Hospital in Toronto, along with Dr. Hartmut Grasemann, Staff Physician in the Division of Respiratory Medicine at SickKids are leading a pioneering effort to use extracellular vesicles – tiny droplets released by cells – to understand, diagnose, and potentially even treat chronic lung infections in people living with CF.  

With a 2023 Seed Grant award – one-year of funding from Cystic Fibrosis Canada aimed at helping researchers explore new ideas and generate preliminary data – Dr. Zani and his team have taken steps in decoding these tiny messages. Their goal is to develop a non-invasive test that could predict or detect pulmonary exacerbations before they spiral out of control.  

“Cell Trash” 

Extracellular vesicles were once thought to be cellular garbage – just waste being discarded. But researchers now know that these nano-sized particles carry messages between cells, including genetic material and proteins. Think of them as text messages sent by your cells, revealing their internal state. 

“If you’re happy, you send a happy text. If you’re angry, your message reflects that,” he explains. “Cells do the same with these vesicles.” 

Dr. Zani has been studying extracellular vesicles for over a decade in pediatric conditions, but this project was his first deep dive in CF. His team used stored sputum samples to extract vesicles and analyze their contents.  

What they found was a unique biological “signature” that changes between sickness and recovery. Samples taken during a pulmonary exacerbation were vastly different from those taken after three weeks of antibiotics. 

“This gives us a peek into the lungs without a biopsy. That’s huge, especially when a patient is very sick.” 

Detective Work 

What’s exciting about this research is the ability to pair vesicle data with clinical information, like lung function tests and the specific bacteria causing the infection. This approach could lead to personalized medicine strategies, helping clinicians understand how a patient’s lungs are responding to treatment. 

Some of the findings even surprised Dr. Zani. One protein that initially seemed unimportant turned out to be the body’s way of trying to make sticky lung secretions more fluid – a crucial function.  

“It’s like a detective story,” he says. “You’re piecing together messages, old studies, and biology to understand the full picture.” 

Small Grant, Big Impact 

The 2023 Seed Grant award from Cystic Fibrosis Canda funded the costly lab work, like sequencing and proteomics, that made this project possible. The team was able to generate enough data to publish in ERJ Open Research and are working on follow-up papers. 

Now, they’re applying for further funding because they believe this is just the beginning. Extracellular vesicles could become not just diagnostic tools, but even therapeutic agents, mimicking the body’s natural healing messages.  

Dr. Zani passionately advocates for more small-scale funding opportunities, like the one Cystic Fibrosis Canada offers. These grants allow researchers to test bold new ideas that may not yet qualify for major funding support.  

“Sometimes you need that small snowball to start rolling. These grants are how you build momentum.” 

This research opens a new frontier for CF care – one that’s less invasive and more personalized. By analyzing the “text messages” your cells send during illness and recovery, researchers like Dr. Zani are working to help people with CF.