title: Effects of structural and "mixed" isomers of Glu-Trp dipeptide on normal hemopoietic stem cells.
abstract: We studied the effects of optical (dd-, ll-, dl-, and ld-dipeptides with alpha-bond, EW) structural isomers and cyclic (dd-, ll-, dl-, and ld-dipeptides with gamma-bond, iEW) analogs of Glu-Trp synthetic dipeptide on the population of normal hemopoietic stem cells. Dipeptides containing lGlu (lGlu-lTrp, lGlu-dTrp) injected to mice were inert towards committed bone marrow CFU-S; dGlu-containing dipeptides (dGlu-dTrp, dGlu-lTrp) inhibited the growth of CFU-S-8; and LiGlu-dTrp stimulated these cells. Inhibitory or stimulatory effects of optical and chemical isomers of Glu-Trp dipeptide are determined by optical orientation and nature of peptide bond of Glu residue. The effects of cyclic and mixed peptides towards colony formation are similar to those of the corresponding linear dipeptides.
authors.affiliation: Medical Radiology Research Center, Russian Academy of Medical Sciences, Obninsk. ovs45@mail.ru
authors.forename: O V
authors.initials: OV
authors.lastname: Semina
authors.forename: T N
authors.initials: TN
authors.lastname: Semenets
authors.forename: I A
authors.initials: IA
authors.lastname: Zamulaeva
authors.forename: E I
authors.initials: EI
authors.lastname: Selivanova
authors.forename: Ya V
authors.initials: YV
authors.lastname: Malyutina
authors.forename: A S
authors.initials: AS
authors.lastname: Saenko
authors.forename: V I
authors.initials: VI
authors.lastname: Deigin
mesh_terms: D000818:Animals; D003114:Colony-Forming Units Assay; D004151:Dipeptides / Q000737:chemistry* / Q000494:pharmacology*; D005260:Female; D006412:Hematopoietic Stem Cells / Q000166:cytology / Q000187:drug effects*; D007536:Isomerism; D051379:Mice; D008810:Mice, Inbred C57BL; D008808:Mice, Inbred CBA; D010456:Peptides, Cyclic / Q000737:chemistry / Q000494:pharmacology; D013237:Stereoisomerism
chemical_list: D004151:Dipeptides; D010456:Peptides, Cyclic; C057081:alpha-glutamyltryptophan