TY - JOUR
T1 - Mutant huntingtin impairs neurodevelopment in human brain organoids through CHCHD2-mediated neurometabolic failure
AU - Lisowski, Pawel
AU - Lickfett, Selene
AU - Rybak-Wolf, Agnieszka
AU - Menacho, Carmen
AU - Le, Stephanie
AU - Pentimalli, Tancredi Massimo
AU - Notopoulou, Sofia
AU - Dykstra, Werner
AU - Oehler, Daniel
AU - López-Calcerrada, Sandra
AU - Mlody, Barbara
AU - Otto, Maximilian
AU - Wu, Haijia
AU - Richter, Yasmin
AU - Roth, Philipp
AU - Anand, Ruchika
AU - Kulka, Linda A M
AU - Meierhofer, David
AU - Glazar, Petar
AU - Legnini, Ivano
AU - Telugu, Narasimha Swamy
AU - Hahn, Tobias
AU - Neuendorf, Nancy
AU - Miller, Duncan C
AU - Böddrich, Annett
AU - Polzin, Amin
AU - Mayatepek, Ertan
AU - Diecke, Sebastian
AU - Olzscha, Heidi
AU - Kirstein, Janine
AU - Ugalde, Cristina
AU - Petrakis, Spyros
AU - Cambridge, Sidney
AU - Rajewsky, Nikolaus
AU - Kühn, Ralf
AU - Wanker, Erich E
AU - Priller, Josef
AU - Metzger, Jakob J
AU - Prigione, Alessandro
N1 - © 2024. The Author(s).
PY - 2024/8/22
Y1 - 2024/8/22
N2 - Expansion of the glutamine tract (poly-Q) in the protein huntingtin (HTT) causes the neurodegenerative disorder Huntington's disease (HD). Emerging evidence suggests that mutant HTT (mHTT) disrupts brain development. To gain mechanistic insights into the neurodevelopmental impact of human mHTT, we engineered male induced pluripotent stem cells to introduce a biallelic or monoallelic mutant 70Q expansion or to remove the poly-Q tract of HTT. The introduction of a 70Q mutation caused aberrant development of cerebral organoids with loss of neural progenitor organization. The early neurodevelopmental signature of mHTT highlighted the dysregulation of the protein coiled-coil-helix-coiled-coil-helix domain containing 2 (CHCHD2), a transcription factor involved in mitochondrial integrated stress response. CHCHD2 repression was associated with abnormal mitochondrial morpho-dynamics that was reverted upon overexpression of CHCHD2. Removing the poly-Q tract from HTT normalized CHCHD2 levels and corrected key mitochondrial defects. Hence, mHTT-mediated disruption of human neurodevelopment is paralleled by aberrant neurometabolic programming mediated by dysregulation of CHCHD2, which could then serve as an early interventional target for HD.
AB - Expansion of the glutamine tract (poly-Q) in the protein huntingtin (HTT) causes the neurodegenerative disorder Huntington's disease (HD). Emerging evidence suggests that mutant HTT (mHTT) disrupts brain development. To gain mechanistic insights into the neurodevelopmental impact of human mHTT, we engineered male induced pluripotent stem cells to introduce a biallelic or monoallelic mutant 70Q expansion or to remove the poly-Q tract of HTT. The introduction of a 70Q mutation caused aberrant development of cerebral organoids with loss of neural progenitor organization. The early neurodevelopmental signature of mHTT highlighted the dysregulation of the protein coiled-coil-helix-coiled-coil-helix domain containing 2 (CHCHD2), a transcription factor involved in mitochondrial integrated stress response. CHCHD2 repression was associated with abnormal mitochondrial morpho-dynamics that was reverted upon overexpression of CHCHD2. Removing the poly-Q tract from HTT normalized CHCHD2 levels and corrected key mitochondrial defects. Hence, mHTT-mediated disruption of human neurodevelopment is paralleled by aberrant neurometabolic programming mediated by dysregulation of CHCHD2, which could then serve as an early interventional target for HD.
KW - Humans
KW - Transcription Factors/metabolism
KW - DNA-Binding Proteins/metabolism
KW - Huntingtin Protein/genetics
KW - Organoids/metabolism
KW - Mitochondrial Proteins/metabolism
KW - Brain/metabolism
KW - Huntington Disease/metabolism
KW - Induced Pluripotent Stem Cells/metabolism
KW - Male
KW - Mitochondria/metabolism
KW - Mutation
KW - Mitochondrial Dynamics/genetics
U2 - 10.1038/s41467-024-51216-w
DO - 10.1038/s41467-024-51216-w
M3 - Article
C2 - 39174523
SN - 2041-1723
VL - 15
SP - 7027
JO - Nature Communications
JF - Nature Communications
IS - 1
ER -