Ultrastructural appearance of hTM cells under CMS. Left panels: Representative lower magnification of NS or cells under CMS. Right panel: higher magnification of inset in stretched cells. Note that autophagosomes were not found within nuclei of NS or CMS cells. Nu, nucleus; V, vacuoles; AV, autophagic vacuole; ER, endoplasmic reticulum; M, mitochondria.