title: Immunocytochemical demonstration of polyamines in nucleoli and nuclei.
abstract: Although biochemical studies have shown that polyamines (PAs) occur in the nucleus, only few studies have examined the intranuclear distribution of these organic cations. By immunocytochemistry, we have previously demonstrated that PAs are located in ribosomes. We now show that PAs also are present in both nucleoli and nuclei of a variety of cell types. Detection of nucleolar and nuclear PAs required novel pretreatment procedures involving protease and/or DNase digestion of specimens prior to immunoreaction. Double fluorescence staining confirmed the localizations. This suggests that PAs may be important to the formation of ribosomes in nucleoli, as well as adds support to biochemical studies suggesting that PAs are involved in many biological events in the nucleus. Further biochemical studies will be needed to substantiate this hypothesis.
authors.affiliation: Department of Applied Life Science, Faculty of Biotechnology and Life Science, Sojo University, Ikeda 4-22-1, Kumamoto 860-0082, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Shin
authors.forename: Hiromichi
authors.initials: H
authors.lastname: Nakamuta
authors.forename: Naoko
authors.initials: N
authors.lastname: Oda-Ueda
authors.forename: Lars-Inge
authors.initials: LI
authors.lastname: Larsson
authors.forename: Kunio
authors.initials: K
authors.lastname: Fujiwara
mesh_terms: D045744:Cell Line, Tumor; D002466:Cell Nucleolus / Q000737:chemistry*; D002467:Cell Nucleus / Q000737:chemistry*; D006367:HeLa Cells; D006801:Humans; D007120:Immunochemistry / Q000379:methods; D019169:Jurkat Cells; D011073:Polyamines / Q000032:analysis*; D012270:Ribosomes / Q000737:chemistry; D020298:U937 Cells
chemical_list: D011073:Polyamines