ENERGIZE THE FIGHT.

BREAKING NEWS: FDA APPROVES TK2D THERAPY

The U.S. Food and Drug Administration (FDA) has approved UCB’s Kygevvi (doxecitine and doxribtimine) to treat the mitochondrial disease TK2d.  “It’s hard to put into words what today’s decision means for patients living with TK2d,” said UMDF President and CEO Kristen Clifford. READ MORE >>

UMDF To Host Special Ask the Mito Doc Focused on TK2d Therapy Kygevvi with Dr. Michio Hirano: Join us for a special Ask the Mito Doc webinar with Michio Hirano, MD, of Columbia University focused on questions related to TK2d and Kygevvi (doxecitine and doxribtimine) on Tuesday, November 25, at 11:00am ET.
CLICK HERE to register and submit questions.

Join UMDF Quarterly TK2d Support Group Meetings: We invite all TK2d families to join us for our next TK2d Virtual Support Meeting on November 19 at 12:00pm ET.
CLICK HERE to register for the November meeting – and watch for invites to regular meetings.  

Need to Connect with Us?

Call the Support Line: (888) 900-6486

Find a Doctor

FIND A MITO DOC 

UMDF maintains a list of 200+ doctors treating and researching mitochondrial disease.

Ways to Give

WE CAN’T DO IT ALONE  

Your involvement is critical to find a cure for mitochondrial disease.

Find an Event

VIEW UMDF EVENTS 

Find a virtual support meeting or UMDF fundraiser in your hometown.

Take Action

BE AN ADVOCATE  

Use your voice to impact legislation affecting the mitochondrial community at the federal and state level.

Find Support

UMDF IS HERE TO HELP 

Get helpful resources, educational info and caring support.

Our Impact

READ IMPACT REPORT 

The work done through UMDF is making a global impact.

UMDF Connect

FDA Approves First-Ever TK2d Therapy

11/3/25, 5pm EST -- Earlier today, the U.S. Food and Drug Administration (FDA) approved UCB’s Kygevvi (doxecitine and doxribtimine) to treat the mitochondrial disease thymidine kinase 2 deficiency (TK2d). “It’s hard to put into words what today’s decision means for...

read more