Wyniki wyszukiwania

1

Effect of ANP on the RNA content in hypothalamic NSO and NPV cells in rats

100%

Siekierska E., Czechowicz K., Zabczyk I.

Zoologica Poloniae

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1996

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tom 41

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nr 1-4

2

Vitamin A deficiency alters the bioelectric parameters and RNA content of rat gastric mucosa in vitro

100%

Ventura U., Ceriani T., Montini E., Romano M., Ricci V.

Journal of Physiology and Pharmacology

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2003

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tom 54

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nr 4

The present study was aimed to investigate the mechanisms by which vitamin A plays a role in maintaining the efficiency of gastric mucosal barrier. Particularly, we measured electrical parameters and the RNA/DNA ratio of gastric mucosa isolated in vitro from the stomach of rats in which vitamin A-deficiency was induced by means of a vitamin A-free diet and then abolished by means of a massive vitamin A supplementation. Pair-fed vitamin A-nondepleted rats and normal rats fed ad libitum on a standard diet served as controls. Vitamin A status was assayed for each group of rats by measuring the hepatic content of vitamin A. We found that in gastric mucosa vitamin A-deficiency induced: 1) a decrease in both transmucosal potential difference and short-circuit current; 2) an increase in transmucosal electrical resistance; 3) a decrease in RNA content resulting in a decreased RNA/DNA ratio. Abolishment of vitamin A-deficiency restored both electrical parameters and RNA content of rat gastric mucosa. Our results stress the role of vitamin A in maintaining the efficiency of the gastric mucosal barrier. Vitamin A seems to act by stabilizing gastric electrical parameters and by controlling the protein synthesis/turnover in the surface gastric mucosal cells.

3

The comparison of changes of RNA contents of isolated fraction of free ribosomes and morphometrically evaluated number of free ribosomes in hepatocytes regeneration of rat liver

84%

Jaszczuk-Jarosz B., Turski W. A.

Folia Histochemica et Cytobiologica

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1984

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tom 22

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nr 2

4

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Wpływ estru etylowego kwasu p-hydroksybenzoesowego na zdolność wbudowywania 32p do kwasów nukleinowych komórki zwierzęcej - w hodowli tkankowej

67%

Fitak B., Lipinski S.

Roczniki Państwowego Zakładu Higieny

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1970

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tom 21

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nr 2

5

Effect of calcium on RNA content in meristematic cells of pea [Pisum sativum L.] roots treated with toxic metals

67%

Lbik-Nowak A., Gabara B.

Folia Histochemica et Cytobiologica

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1997

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tom 35

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nr 4

Ograniczanie wyników

2 Folia Histochemica et Cytobiologica

1 Journal of Physiology and Pharmacology

1 Roczniki Państwowego Zakładu Higieny

1 Zoologica Poloniae

1 Ceriani T.

1 Czechowicz K.

1 Fitak B.

1 Gabara B.

1 Jaszczuk-Jarosz B.

1 Lbik-Nowak A.

1 Lipinski S.

1 Montini E.

1 Ricci V.

1 Romano M.

1 Siekierska E.

1 Turski W. A.

1 Ventura U.

1 Zabczyk I.

1 2003

1 1997

1 1996

1 1984

1 1970

Effect of ANP on the RNA content in hypothalamic NSO and NPV cells in rats

Vitamin A deficiency alters the bioelectric parameters and RNA content of rat gastric mucosa in vitro

The comparison of changes of RNA contents of isolated fraction of free ribosomes and morphometrically evaluated number of free ribosomes in hepatocytes regeneration of rat liver

Wpływ estru etylowego kwasu p-hydroksybenzoesowego na zdolność wbudowywania 32p do kwasów nukleinowych komórki zwierzęcej - w hodowli tkankowej

Effect of calcium on RNA content in meristematic cells of pea [Pisum sativum L.] roots treated with toxic metals