Cell Differentiation; Demyelinating Diseases/surgery; Induced Pluripotent Stem Cells/cytology; Oligodendroglia/cytology; Stem Cells/cytology; Animals; Basic Helix-Loop-Helix Transcription Factors/genetics; Basic Helix-Loop-Helix Transcription Factors/metabolism; Cells, Cultured; Fluorescent Antibody Technique; Gene Expression; Humans; Induced Pluripotent Stem Cells/metabolism; Male; Nerve Tissue Proteins/genetics; Nerve Tissue Proteins/metabolism; Oligodendrocyte Transcription Factor 2; Oligodendroglia/metabolism; Oligodendroglia/transplantation; Optic Chiasm/pathology; Optic Chiasm/surgery; Rats; Rats, Sprague-Dawley; Receptor, Platelet-Derived Growth Factor alpha/genetics; Receptor, Platelet-Derived Growth Factor alpha/metabolism; Reverse Transcriptase Polymerase Chain Reaction; SOXE Transcription Factors/genetics; SOXE Transcription Factors/metabolism; Stem Cell Transplantation/methods; Stem Cells/metabolism; Transplantation, Heterologous; Treatment Outcome