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2.
Chronobiologia ; 8(4): 369-73, 1981.
Artigo em Inglês | MEDLINE | ID: mdl-7327056

RESUMO

Flow cytometry, a technique which allows rapid quantitation of the percentages of a cell population in the various cell cycle phases, closely duplicated the previously reported circadian rhythm for mouse bone marrow DNA synthesis. The effect of ara-C, an S phase specific anti-neoplastic drug, on this rhythm was investigated. Ara-C was shown to suppress this rhythm to a much greater degree when injected at the peak of the bone marrow DNA synthesis as compared to the low. Thus, damage to the bone marrow during treatment with ara-C may be reduced if the circadian rhythm of bone marrow DNA synthesis is taken into account.


Assuntos
Medula Óssea/efeitos dos fármacos , Ritmo Circadiano/efeitos dos fármacos , Citarabina/farmacologia , DNA/biossíntese , Animais , Medula Óssea/metabolismo , Feminino , Citometria de Fluxo , Muridae
3.
Res Commun Chem Pathol Pharmacol ; 30(2): 365-8, 1980 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-7444164

RESUMO

Mouse L1210 leukemia cells killed by ara-C, an anti-tumor agent widely used against leukemia, were demonstrated to be in the S phase of the cell cycle by flow microfluorometry. The point in S phase at which the L1210 cells died was shown to be dose dependent. At higher concentrations of ara-C cells died earlier in the S phase.


Assuntos
Ciclo Celular/efeitos dos fármacos , Citarabina/farmacologia , Animais , Sobrevivência Celular/efeitos dos fármacos , DNA de Neoplasias/metabolismo , Fluorometria/métodos , Leucemia L1210/metabolismo , Camundongos
13.
J Phycol ; 3(4): 161-5, 1967 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27065025

RESUMO

Cultures of Anabaena cylindrica Lemm. and Eucapsis sp. were harvested, freeze-dried, and prepared for electron microscope studies. A comparison of the freeze-dried preparations was made with control specimens not freeze-dried. Fixation and embedding were according to the Ryter and Kellenberger technique. The photosynthelic thylakoids of the freeze-dried cells were more distinct and less distorted than those of the control cells. Freeze-dried Eucapsis sp. cells exhibited a prominent mucous capsule, whereas in the nonfreeze-dried, no such capsule could be discerned.

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