We show that Htt-Q140/7 mutant that models HD do not
display a defect in mitochondrial ATP synthesis in embryonic cells.
In mature neurons, however,HD clearly leads to mitochondrial
ATP deficit and cell death.Therefore, an interesting and unresolved
question is:at what point of development does the initial damages
from gain-of poly-Q mutation that ultimately leads to HD becomes
cytotoxic? Providing the answer to this question at the cellular and
embryological level will provide important clues on the progres-
sion of HD,and in evitably have a strong impact in the rationale
design of HD treatments.