Organelle mapping in dendrites of human iPSC-derived neurons reveals dynamic functional dendritic Golgi structures
Jingqi Wang,
Maciej Daniszewski,
Marlene M. Hao,
Damián Hernández,
Alice Pébay,
Paul A. Gleeson,
Lou Fourriere
Affiliations
Jingqi Wang
The Department of Biochemistry and Pharmacology and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia
Maciej Daniszewski
Department of Anatomy and Physiology, The University of Melbourne, Parkville, VIC 3010, Australia
Marlene M. Hao
Department of Anatomy and Physiology, The University of Melbourne, Parkville, VIC 3010, Australia
Damián Hernández
Department of Anatomy and Physiology, The University of Melbourne, Parkville, VIC 3010, Australia
Alice Pébay
Department of Anatomy and Physiology, The University of Melbourne, Parkville, VIC 3010, Australia; Department of Surgery, Royal Melbourne Hospital, The University of Melbourne, Parkville, VIC 3010, Australia
Paul A. Gleeson
The Department of Biochemistry and Pharmacology and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; Corresponding author
Lou Fourriere
The Department of Biochemistry and Pharmacology and Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia; Corresponding author
Summary: Secretory pathways within dendrites of neurons have been proposed for local transport of newly synthesized proteins. However, little is known about the dynamics of the local secretory system and whether the organelles are transient or stable structures. Here, we quantify the spatial and dynamic behavior of dendritic Golgi and endosomes during differentiation of human neurons generated from induced pluripotent stem cells (iPSCs). In early neuronal development, before and during migration, the entire Golgi apparatus transiently translocates from the soma into dendrites. In mature neurons, dynamic Golgi elements, containing cis and trans cisternae, are transported from the soma along dendrites, in an actin-dependent process. Dendritic Golgi outposts are dynamic and display bidirectional movement. Similar structures were observed in cerebral organoids. Using the retention using selective hooks (RUSH) system, Golgi resident proteins are transported efficiently into Golgi outposts from the endoplasmic reticulum. This study reveals dynamic, functional Golgi structures in dendrites and a spatial map for investigating dendrite trafficking in human neurons.
