Fat Transport Deficiency Explains Rare Child Metabolic Crises

Fat Transport Deficiency Explains Rare Child Metabolic Crises


Mitochondria of TDD Patient fibroblasts under normal nutritional conditions. Imajej fire filter. Credit: Agustín Lujan/Kentro de Regulación Genómica

Researchers study a protein linked to a rare, servere disease have made a discovery that shds light on how cells he energy needs needs during a severe metabolic crisis. The Findings Cold Lead to New Treatments for the Disease and Open New Avenues of Research for other conditions involving impaired fat metabolism.

When scientists at the center for genomic regulation (CRG) in Barcelona first identified a handful of protein-coding genes called tango in 2006, they have no idea that one of them, tango, tango2, would be LINDOD to a life-threatening disorder in Children. In 2016, The Researchers found that mutations in tango2 cause a rare disease no officially recognized as tango2 deficiency disorder (TDD).

There are about 110 Known Patients with TDD Worldwide, Thought there are thought to be an estimated Six to nine Thousand undignosed patients in total.

Normally, when the body Increases its energy demands, cells deplete their carbohydrate stores and begin to use lipids to produce energy instead. This is particularly important for the heart, which derives between 60 to 90% of its energy requirements from consuming lipids in the mitochondria of cells.

Children with tango2 deficiency struggle to meet the body’s energy demands, lead to life-threatening metabolic cries. These Episodes are marked by Sudden Drops in Blood Sugar, Muscle Breakdown (Rhabdomyolysis), and potentially Fatal Heart Rhythm Disturbances (Cardiac ArrrythMIAS). The cries are often triggered by physical stress, such as a high fever, viral infections or a missed meal.

Thought the Rarity of TDD means that most doctors will never see a case firsthand, the consorteks can be devastating, and many familyies relay on high-alrt interactions in the hospitals.

“Families sometimes only find out Family of genes two decades ago. “One moment, everything seems normal. Then, under an energy-decanding situation, these children’s muscles and hearts fail to keep up.”

In the last decade, Malhotra’s team has been exploring what tango2 does at the molecular level and why its disruption causes life-threatening symptoms. They recently showed the protein is in the mitochondria, suggesting it plays an important role in energy production. They have also found tango2-deficient cells accumulate more fat droplets and produce excess reactive oxygen speecies, leading to damaged or unusable lipids.

In the latest study, Published in the Journal of Cell BiologyThe Researchers Demonstrate that Tango2 directly binds to a key fat molecule called acyl-fola, transporting them like a shuttle inside cells. The Author’s of the Study Made the Findings by Tagging Tango2 With Glowing Markers to Trace Its Movements in Live Cells.

The discovery shds new light on why metabolic emergencies Occur in Children living with tdd. “Tango2 Grabs Fats and Readies Them For Combustion. The cells of child Agustin Lujan, First Author of the Study and Medical Doctor who is now postdoctoral Researcher at the Center for Genomic Regulation.

One of the few existing treatment for the condition involves giving patients high doses of vitamin b5, an essential nutrient to generate coenzyme a. “We still doy Vitamin B5 Helps Avoid metabolic cries, but it may be boosting residual energy pathways that tango2 normally supports, “Says Dr. Lujan.

Thought tango2 deficiency is rare, the science behind how cells shuttle fat to fuel-hungry tissues might apply more broadly. “It Cold Help Us Understand Heart or Muscle Diseases in the General Population,” Says Dr. Malhotra. “Millions of People Wrestle with Heart Problems or Abnormal Fat Metabolism, and the Fundamental Chemistry Isn Bollywood Different. The biology of rare dreams can help us undestand human health in General. “

The Author’s of the Study Now Hope to Determine Exactly How Tango2 Latches Onto Acyl-Coa and Whether It Hands Off these Fats to Specific Enzymes Inseide the Mitochondria. They will also also explore Whether Tango2 Travels Back and Forth Between different parts of the cell during time of stress.

In Practical Terms, The New Insights Could Eventutically Inform Treatments, or at Least Help Doctors Spot The Early Warning Signs of Tango2 deficiency. “The More we Clarify the Molecular Underpinnings, The Better Our Chances of Developing Targeted Therapies,” Says Dr. Ombretta Foresti, Co-Author of the Study and Staff Scientist at the CRG. “And hopefully, with better undersrstanding, we can give familyies Facing this disease more than just emergency measures.”

The Findings of the Study Were Possible Thanks to an International Collection Between Scientists, Doctors and Patient Association like the Tango2 Research Foundation, Which Facility Data for analysis obtained for analysis Biological Samples TAKEN from Patients with the Condition.

For parents of affected child, any step forward is encouraging. “Each New Discovery and Insight Get Us Closer to Where we Ultimately Want to Be,” Says Mike Morris, Parent of a Child with TDD and Cofounder of the Tango 2 Research Foundation.

“We’re grateful to scientists Around the world as they work to piese togeether this puzzle and have a positive impact on patients and familyies living with tdd,” Adds kasha morris, cofounds of the tango2 Research Foundation.

“Over the past decade, fundamental, laboratory-based research has transformed this narrary, offering hope where nse on once existed. Principles in the Life Sciences, as Well as the Vital Collection Between Researchers, Physicians, and Families in Confroning Human Pathologies, “CONCLUDES DR. Malhotra.

More information:
Agustin Lujan et al, Tango2 is an acyl-coa binding protein, Journal of Cell Biology (2025). Doi: 10.1083/jCB.202410001

Provided by Center for Genomic Regulation


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