Business Standard

Researchers identify new mitochondrial disease in identical twins

Researchers at Massachusetts General Hospital (MGH) and Children's Hospital Philadelphia (CHOP) have identified a mitochondrial disease in a set of identical twins which was not previously reported

health, digital, data, medical, healthcare, public health, frontline workers, doctors, nurses, researchers

ANI Health

Investigators led by researchers at Massachusetts General Hospital (MGH) and Children's Hospital Philadelphia (CHOP) have identified a mitochondrial disease in a set of identical twins which was not previously reported.

Diseases that affect mitochondria--specialized compartments within cells that contain their own DNA and convert the food we eat into the energy needed to sustain life--typically interfere with mitochondrial function, but in these two patients, mitochondria were hyperactive.

So, as reported in the New England Journal of Medicine, even though the siblings were eating far more calories than needed, their body weights remained very low.

"This is a highly unusual mitochondrial phenotype. There are more than 300 rare genetic mitochondrial diseases, and nearly all of them are associated with an interruption of mitochondria," says senior author Vamsi K. Mootha, MD, a Professor of Systems Biology and Medicine at MGH.

 

Genome sequencing revealed a mutation in an enzyme called the mitochondrial ATP synthase, which is required by cells to generate the energy storage molecule ATP.

Experiments indicated that this mutation creates "leaky" mitochondria that dissipate energy--a process called mitochondrial uncoupling.

"We propose a new name--mitochondrial uncoupling syndrome--that presents with hyper metabolism and uncoupled mitochondria," says Mootha. "These cases are very important for the field of rare disease genetics, mitochondrial biology, and metabolism."

The authors note that additional studies on mitochondrial uncoupling syndromes may provide insights into differences in energy metabolism in the general population.

"These twins represent the first disorder of mitochondrial uncoupling where we have been able to find the genetic cause," said Rebecca D. Ganetzky, MD, an attending physician in the Mitochondrial Medicine program at CHOP and co-author of the study.

She added, "By discovering that pathogenic variants in the ATP synthase itself can cause mitochondrial uncoupling, these twins may be the first identified patients in a whole class of diseases of mitochondrial coupling.

(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)

Topics : disease

Don't miss the most important news and views of the day. Get them on our Telegram channel

First Published: Oct 16 2022 | 10:16 AM IST

Explore News