title: Abnormal neuronal differentiation and mitochondrial dysfunction in hair follicle-derived induced pluripotent stem cells of schizophrenia patients.
abstract: One of the prevailing hypotheses suggests schizophrenia as a neurodevelopmental disorder, involving dysfunction of dopaminergic and glutamatergic systems. Accumulating evidence suggests mitochondria as an additional pathological factor in schizophrenia. An attractive model to study processes related to neurodevelopment in schizophrenia is reprogramming of somatic cells into induced pluripotent stem cells (iPSCs) and differentiating them into different neuronal lineages. iPSCs from three schizophrenia patients and from two controls were reprogrammed from hair follicle keratinocytes, because of their accessibility and common ectodermal origin with neurons. iPSCs were differentiated into Pax6(+)/Nestin(+) neural precursors and then further differentiated into β3-Tubulin(+)/tyrosine hydroxylase(+)/DAT(+) dopaminergic neurons. In addition, iPSCs were differentiated through embryonic bodies into β3-Tubulin(+)/Tbox brain1(+) glutamatergic neurons. Schizophrenia-derived dopaminergic cells showed severely impaired ability to differentiate, whereas glutamatergic cells were unable to maturate. Mitochondrial respiration and its sensitivity to dopamine-induced inhibition were impaired in schizophrenia-derived keratinocytes and iPSCs. Moreover, we observed dissipation of mitochondrial membrane potential (Δψm) and perturbations in mitochondrial network structure and connectivity in dopaminergic along the differentiation process and in glutamatergic cells. Our data unravel perturbations in neural differentiation and mitochondrial function, which may be interconnected, and of relevance to dysfunctional neurodevelopmental processes in schizophrenia.
authors.affiliation: Laboratory of Psychobiology, Department of Psychiatry, Rambam Medical Center, B Rappaport Faculty of Medicine and B Rappaport Research Institute, Technion, Haifa, Israel.
authors.forename: O
authors.initials: O
authors.lastname: Robicsek
authors.forename: R
authors.initials: R
authors.lastname: Karry
authors.forename: I
authors.initials: I
authors.lastname: Petit
authors.forename: N
authors.initials: N
authors.lastname: Salman-Kesner
authors.forename: F-J
authors.initials: FJ
authors.lastname: Müller
authors.forename: E
authors.initials: E
authors.lastname: Klein
authors.forename: D
authors.initials: D
authors.lastname: Aberdam
authors.forename: D
authors.initials: D
authors.lastname: Ben-Shachar
mesh_terms: D000943:Antigens, Differentiation / Q000096:biosynthesis / Q000235:genetics; D019070:Cell Lineage; D002478:Cells, Cultured; D015259:Dopamine Agents / Q000494:pharmacology; D004475:Ectoderm / Q000166:cytology; D018683:Excitatory Amino Acid Agents / Q000494:pharmacology; D005786:Gene Expression Regulation; D018859:Hair Follicle / Q000473:pathology*; D006801:Humans; D057026:Induced Pluripotent Stem Cells / Q000378:metabolism / Q000473:pathology*; D015603:Keratinocytes / Q000473:pathology*; D053078:Membrane Potential, Mitochondrial; D008928:Mitochondria / Q000378:metabolism*; D008959:Models, Neurological; D009419:Nerve Tissue Proteins / Q000096:biosynthesis / Q000235:genetics; D055495:Neurogenesis; D009474:Neurons / Q000187:drug effects / Q000378:metabolism / Q000473:pathology*; D010101:Oxygen Consumption; D012333:RNA, Messenger / Q000096:biosynthesis / Q000235:genetics; D012563:Schizophrenia, Paranoid / Q000378:metabolism / Q000473:pathology*
chemical_list: D000943:Antigens, Differentiation; D015259:Dopamine Agents; D018683:Excitatory Amino Acid Agents; D009419:Nerve Tissue Proteins; D012333:RNA, Messenger