Paul Conyngham, a Sydney-based AI consultant, used ChatGPT and other AI tools to design a custom mRNA vaccine that helped his rescue dog Rosie's mast cell cancer enter partial remission. The eight-year-old dog's largest tumor shrank dramatically after receiving the experimental treatment in December, and Rosie regained mobility and function she had lost. The story caught the attention of OpenAI CEO Sam Altman, who called it an "amazing story" on social media .

How Did ChatGPT Help Design a Personalized Cancer Treatment?

Conyngham's months-long quest began after Rosie's cancer was misdiagnosed for nearly a year. After trying chemotherapy, standard immunotherapy, and surgery with mounting costs, he turned to AI tools to explore emerging treatment options. He conducted extensive conversations with ChatGPT, Google's Gemini, and Elon Musk's Grok to study cancer therapies in depth .

Following the chatbots' recommendations, Conyngham took several concrete steps to develop the treatment:

• Genome Sequencing: He paid $3,000 to have Rosie's genome sequenced and used AI tools to analyze her DNA data
• Protein Modeling: He employed AlphaFold, a scientific AI model that won the 2024 Nobel Prize in Chemistry, to better understand one of Rosie's mutated genes
• Research Collaboration: ChatGPT recommendations led him to a University of New South Wales (UNSW) team and other Australian academics who brought his research to life
• mRNA Vaccine Design: He used AI to design the actual mRNA sequence for the vaccine, which was then synthesized by researchers
• Regulatory Navigation: Chatbots assisted him in navigating ethical approval paperwork required for the experimental treatment

The University of Queensland professor who administered the treatment worked with Conyngham's AI-designed vaccine alongside powerful immunotherapy. Not all of Rosie's tumors responded equally well, and she required additional surgery afterward, but the results were significant enough to attract scientific attention .

What Do Experts Say About AI's Role in Medical Research?

Scientists emphasize that while Conyngham's story is remarkable, it highlights both the promise and limitations of AI in accelerating medical discovery. Pall Thordarson, director of UNSW's RNA institute which created the vaccine, explained the AI's contribution: "He used the AI program to design the actual mRNA sequence. And then he gave that information to us" . However, Thordarson and other experts stress that the outcome remains uncertain.

"The short answer is we don't know for sure what actually led to the reduction in size of Rosie's biggest tumour," said Pall Thordarson, director of UNSW's RNA institute.

Pall Thordarson, Director of UNSW's RNA Institute

Nick Semenkovich at the Medical College of Wisconsin noted that "AI holds lots of promise to improve and accelerate our research strategies," but cautioned that without published scientific details, it's difficult to assess how much AI actually contributed to the vaccine's development or whether it worked as designed .

"AI transforms a 'needle-in-a-haystack' search into a data-driven selection process, drastically shortening the timeframe between diagnosis and vaccine construction," said Patrick Tang Ming-kuen, a professor from The Chinese University of Hong Kong.

Patrick Tang Ming-kuen, Professor at The Chinese University of Hong Kong

Martin Smith, the UNSW professor who sequenced Rosie's genome, emphasized that the breakthrough was driven by Conyngham's determination rather than AI alone. "This was not a clinical trial by any means and it's not that AI cured cancer," Smith stated. He highlighted how three disruptive technologies converged: genome sequencing, artificial intelligence, and RNA therapeutics .

Why This Story Matters Beyond One Dog's Recovery

Conyngham's experience demonstrates how AI tools like ChatGPT can democratize access to cutting-edge scientific knowledge and accelerate research timelines. By using publicly available AI models, he was able to navigate complex scientific literature, identify relevant treatment approaches, and connect with leading researchers who might not have engaged with him otherwise .

Since the story went global, UNSW researchers have fielded numerous requests from people seeking similar help for their pets and family members. "You know: my cat's got a disease, my dog's got a disease, my aunt has got a disease," Smith noted. "But it's hard for us to be able to help. There's a lot of things that have to align" .

The case also raises important questions about reproducibility and scientific validation. Without published peer-reviewed results, the scientific community cannot fully evaluate whether the AI-designed vaccine was responsible for Rosie's improvement or whether other factors contributed. Semenkovich emphasized this gap: "We don't know enough about the vaccine to understand how much AI helped in its development or if the vaccine worked the way it was designed" .

Semenkovich

Conyngham himself is cautious about claiming a cure. Rosie's prognosis remains uncertain, and it's unclear how long she will survive. Yet the story has captured imaginations precisely because it shows how determined individuals can leverage AI tools to explore possibilities that might otherwise remain inaccessible, potentially opening new pathways for both veterinary and human medicine.