A differential effect of L-serine on the incorporation of3H-deoxycytidine and3H-thymidine into DNA of rat thymocytes

Summary The addition of L-serine to short-term cultures of rat thymocytes stimulated the incorporation of³H-deoxycytidine into DNA, but simultaneously depressed the incorporation of³H-thymidine into DNA.This investigation was supported by NIH grants No. CA-10291 and T12CA8021 from the National Cancer Institute.     

A differential effect of L-serine on the incorporation of 3H-deoxycytidine and 3H-thymidine into DNA of rat thymocytes.

The addition of L-serine to short-term cultures of rat thymocytes stimulated the incorporation of 3H-deoxycytidine into DNA, but simultaneously depressed the incorporation of 3H-thymidine into DNA.     

Effect of folate and folinate on3H-thymidine incorporation by transforming human lymphocytes in vitro

Summary The incorporation of³H-thymidine by Concanavalin A-stimulated human peripheral blood lymphocytes in vitro is inhibited by the presence of folate or folinate in the culture medium in a concentration-dependent manner.     

Effects of environmental changes on the incorporation of carbon atoms of pyruvate into mouse brain and liver

Résumé L'incorporation des atomes radioactifs de 1-¹⁴C-pyruvate dans le cerveau des souris est plus marquée quand les animaux ont soumis à un isolement prolongé.

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This study was supported by the United States Public Health Service (FVD) and by MH No. 15352 (RMP).     

The influence of cocaine and reserpine on the effect of several sympathomimetic amines on the mouse iris

Zusammenfassung Der direkte, indirekte und gemischte Wirkungsmodus von fünfzehn sympathomimetischen Aminen an der Mäuseiris wurde an cocainisierten und reserpinisierten Tieren bestimmt, wobei sich gewisse Unterschiede gegenüber dem Wirkungsmodus an der Katzennickhaut zeigten.     

Early incorporation of labelled palmitate into mouse lung

Résumé Le taux d'incorporation de l'acide palmitique marqué à l'hydrogène 3 dans les cellules des bronchioles terminales et des alvéoles du poumon de la souris, suggère que le surfactan pulmonaire est sécrété par les cellules deClara dans les bronchioles terminales.     

3H-thymidine incorporation (DNA synthesis) and radiotoxicity in the ovary of the Japanese quail before and during follicle formation

No evidence was found for ribosomal DNA amplification in the oocytes of the Japanese quail, before or during folliculogenesis. DNA synthesis in the somatic cells, involved in follicle formation, starts at the medullar side of the basement membrane. The localized sterilization of the quail ovary after administration of 3H-thymidine (3H-TdR) seems to be due to radiation-induced lesions in the follicle forming somatic cells, rather than to direct radiation damage of the oocyte.     

Preliminary report on the incorporation of guanethidine and reserpine into rat peritoneal mast cells in vitro

Zusammenfassung Isolierte peritoneale Mastzellen der Ratte wurden in KRG-Puffer mit Reserpin und Guanethidin inkubiert. Beide Substanzen scheinen unabhängig voneinander aufgenommen zu werden, da die gleichzeitige Inkubation mit Reserpin und Guanethidin die Aufnahme im Vergleich mit den Kontrollen nicht herabsetzt.     

Uridine incorporation into pyramidal nuclei of the mouse brain

Zusammenfassung Beim intranuclearen Einbau von tritiummarkiertem Uriden wurden Unterschiede im Markierungsmuster zwischen Maus-Hippocampus und Cortex-Pyramiden-Neuronen gefunden.     

The incorporation of14C-acetate into the lipids of vacuolated rat liver cells

Riassunto È stata studiata l'incorporazione dell'acetato-1-¹⁴C nei fosfolipidi, nel colesterolo e negli acidi grassi di sezioni di fegato normale e vacuolizzato di ratto. Essa non è variata, in nessuna delle frazioni lipidiche considerate, nelle sezioni di fegato colpito da degenerazione vacuolare. Si discutono i risultati in rapporto alle precedenti osservazioni sulla inibizione dell'incorporazione degli amino acidi marcati nelle proteine delle sezioni di fegato vacuolizzato.     

In vivo and in vitro incorporation of 3H-thymidine in the uterus of the rabbit during pseudopregnancy

During pseudopregnancy in the Rabbit the DNA synthesis in the uterine epithelium is very reduced. These results conjoined with the decrease of the mitotic index and previous ultrastructural observations allow to think that multinucleated cells proceed mainly by cell fusion.