What happens when a rare, devastating genetic condition impacts not just one person in a family, but three siblings? In this episode of DNA Today, we’re joined by siblings Faith Sinclair and Dan Peach who both have sialidosis.

Sialidosis is a rare lysosomal storage disorder that often leaves families searching for answers for years. Faith and Dan share their deeply personal journey with the condition, from the initial struggles of seeking a diagnosis for their brother, Antonn, to the cutting-edge gene therapy research currently underway.

Inside This Episode:

The Diagnostic Odyssey Faith and Dan share the emotional impact of living with Sialidosis and the long road to a definitive diagnosis. We explore the uncertainty that many rare disease families face and how receiving an answer after years of "red flags" reshaped their lives.

Understanding Sialidosis (The Science) We break down the clinical and cellular mechanics of Sialidosis. We discuss:

The role of the NEU1 gene and how mutations lead to cellular dysfunction.
The two primary forms of the condition (Type I and Type II) and their clinical presentations.
Why Sialidosis is frequently misdiagnosed or overlooked by clinicians.

Daily Life & Advocacy What does it look like to manage a rare condition day-to-day? Faith offers a candid look at the balance between medical management and the psychosocial burden on patients and siblings. Dan discusses how his personal and familial connection fueled the mission of Cure Sialidosis.

The Future of Treatment: Gene Therapy We look toward the horizon of rare disease research. Sialidosis is currently entering the pre-clinical gene therapy stage, where the goal is to correct the NEU1 gene. Dan provides an update on the status of enzyme replacement and the global drive to raise funds for manufacturing the treatments required for human trials scheduled for 2026.

About Our Guests:

Dan Peach is a founding member of Cure Sialidosis and a board member of Cure Mucolipidosis. As one of five siblings, three of whom were affected by Sialidosis, his connection to the disorder is profound. Since helping facilitate the diagnosis of his brother Antonn and sister Faith, Dan has become a dedicated patient-researcher. He leads a global community of patients, clinicians, and researchers, collaborating worldwide to address the root causes of the disease and improve outcomes for all affected.

Faith Sinclair is a patient advocate living with Sialidosis, and sister to Dan. Her journey from years of medical uncertainty to a definitive diagnosis has made her a vital voice in the rare disease space, dedicated to sharing the unique perspectives of patients and their families.

Relevant Resources:

CureSialidosis.org

Kiwi siblings battling rare genetic condition

Sialidosis therapy: Kiwi siblings fundraise for injection against disease that killed brother - NZ Herald

More Lysosomal Storage Disorder Episodes on DNA Today:

#380 “Rare Rebels”: When Parents Drive Science, The Story of MPS I

#376 Why Females with Fabry Disease Aren’t “Just Carriers”

#372 Fighting for Time: Hunter Syndrome (MPS Type II), Gene Therapy & Urgent Advocacy

#292 TALEN® Gene Editing Technology with Cellectis (MPS type I Research)

#281 Tay-Sachs with Dr. Matthew Goldstein

#171 Farber Disease with Aceragen

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