DUT (p.Y116C)-Mutation-Induced Thrombocytopenia in Rabbits

Area of Science:

• Hematology
• Genetics
• Mitochondrial Biology

Background:

• Thrombocytopenia is a condition of low platelet counts.
• Mutations in the DUT gene are linked to bone marrow failure and diabetes mellitus syndrome (BMFDMS), often causing thrombocytopenia.

Purpose of the Study:

• To establish a novel rabbit model for thrombocytopenia using base editing targeting the DUT gene.
• To investigate the mechanisms underlying DUT mutation-associated thrombocytopenia and its impact on platelet function.

Main Methods:

• Generation of a rabbit model with the DUT c.3020A>G (p.Y116C) mutation using SpRY-ABEmax base editing.
• Phenotypic analysis of mutant rabbits, including platelet counts, megakaryocyte numbers, and survival rates.
• Mechanistic studies on mitochondrial structure/function and mitophagy in platelets.

Main Results:

• The DUT (p.Y116C) mutation model accurately recapitulates human thrombocytopenia.
• Mutant rabbits showed reduced megakaryocyte numbers, platelet counts, and survival.
• DUT mutation caused mitochondrial dysfunction and enhanced mitophagy in platelets, potentially via the Park2 pathway.

Conclusions:

• This study presents the first genetic rabbit model for DUT (p.Y116C) mutation-associated thrombocytopenia.
• Findings provide insights into DUT's role in platelet production and function.
• The model highlights potential therapeutic targets for human thrombocytopenia.