Fluorimetric measurements and chromatin condensation patterns of nuclei from 3T3 cells throughout G1

G. C. Moser, Robert Fallon, H. K. Meiss

Research output: Contribution to journalArticle

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Abstract

using two cytological methods based on nuclear morphology, quinacrine dihydrochloride (QDH) staining and premature chromosome condensation (PCC), it has been possible to identify cell cycle positions within G1 of growing and arrested 3T3 cells. The fluorescent intensity of QDH-stained interphase cells appears to decrease as the cells pass from mitosis to S phase. Likewise, the length and thickness of prematurely condensed chromatids can be related to the cells' position within the G1 period. Data are presented that deal with three interrelated topics: (1) We determined by fluorometric measurements of nuclei from 3T3 cells that the visual observation of the decrease in QDH fluorescence during G1 reflects an actual decrease in total fluorescence and not a dispersion of the fluorescent chromatin in a larger nuclear area. (2) We correlated the results obtained by QDH staining with those of PCC on the same cell samples blocked in G1 by different conditions. Serum-starved and contact-inhibited cell nuclei had the highest intensity, hydroxyurea-treated ones had the lowest intensity, while that of isoleucine-deprived cells was in between. The same relative order of G1 positions was obtained based on PCC morphology. Thus, both methods monitor the state of chromatin condensation and can be used to identify cell cycle position within G1. (3) We showed with both methods that the states of chromatin resulting from the various G1 blocking conditions differ from each other.

Original languageEnglish (US)
Pages (from-to)293-301
Number of pages9
JournalJournal of Cellular Physiology
Volume106
Issue number2
StatePublished - 1981
Externally publishedYes

Fingerprint

Quinacrine
3T3 Cells
Chromatin
Condensation
Chromosomes
Cells
Fluorescence
Cell Cycle
Hydroxyurea
Isoleucine
Staining and Labeling
Chromatids
Interphase
Cell Nucleus
S Phase
Mitosis
Observation
Serum

ASJC Scopus subject areas

  • Cell Biology
  • Clinical Biochemistry
  • Physiology

Cite this

Fluorimetric measurements and chromatin condensation patterns of nuclei from 3T3 cells throughout G1. / Moser, G. C.; Fallon, Robert; Meiss, H. K.

In: Journal of Cellular Physiology, Vol. 106, No. 2, 1981, p. 293-301.

Research output: Contribution to journalArticle

Moser, G. C. ; Fallon, Robert ; Meiss, H. K. / Fluorimetric measurements and chromatin condensation patterns of nuclei from 3T3 cells throughout G1. In: Journal of Cellular Physiology. 1981 ; Vol. 106, No. 2. pp. 293-301.
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