title: Osmotic behavior of erythrocytes from patients with a major affective disorder. A freeze-fracture electron microscopic study.
abstract: Previously we have demonstrated a state-dependent decrease in the number of membrane vesicles in erythrocytes from patients with a major depressive episode. We now report an increase in the number of membrane vesicles during a manic episode as well as a reduction during lithium treatment and we also present data suggesting that the number of erythrocyte membrane vesicles in the affective disorders is dependent on osmotic shrinkage due to the freezing for freeze-etch electron microscopy. Although caution is required since the interrater reliability of the measurement of osmotic strain was insufficient in the mid range where it was tested, we do not think this invalidates the differences in osmotic strain found in the low and high ranges during depressive and manic episodes respectively. These findings warrant the use of more precise techniques in studies of the osmotic behavior of erythrocytes from patients with a major affective disorder.
authors.affiliation: Department of Medical Biological Research, Psychiatric Hospital Endegeest, Oegstgeest, The Netherlands.
authors.forename: J G
authors.initials: JG
authors.lastname: Goekoop
authors.forename: T
authors.initials: T
authors.lastname: Hoeksema
authors.forename: G M
authors.initials: GM
authors.lastname: Van Kempen
authors.forename: E A
authors.initials: EA
authors.lastname: Van der Velde
authors.forename: F
authors.initials: F
authors.lastname: Spies
mesh_terms: D000328:Adult; D000368:Aged; D001714:Bipolar Disorder / Q000097:blood* / Q000188:drug therapy; D002463:Cell Membrane Permeability / Q000502:physiology; D003034:Coated Pits, Cell-Membrane / Q000648:ultrastructure*; D003866:Depressive Disorder / Q000097:blood* / Q000188:drug therapy; D011992:Endosomes / Q000648:ultrastructure*; D004910:Erythrocyte Membrane / Q000648:ultrastructure*; D005260:Female; D005614:Freeze Fracturing; D006801:Humans; D008094:Lithium / Q000627:therapeutic use; D008297:Male; D008854:Microscopy, Electron; D008875:Middle Aged; D009996:Osmotic Fragility / Q000187:drug effects
chemical_list: D008094:Lithium