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Vinleurosine

Catalog No. TN2301 CAS 23360-92-1

Vinleurosine can partially inhibit the energy dependent transport of alpha-aminoisobutyric acid in Ehrlich ascites tumor cells.

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Vinleurosine, CAS 23360-92-1

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Description	Vinleurosine can partially inhibit the energy dependent transport of alpha-aminoisobutyric acid in Ehrlich ascites tumor cells.
In vitro	Vincristine, other periwinkle alkaloids, and colchicine partially inhibit the energy dependent transport of alpha-aminoisobutyric acid in Ehrlich ascites tumor cells. The properties of this phenomenon were characterized in detail for vincristine. Maximum depression of the steady-state intracellular alpha-aminoisobutyric acid level was achieved with a vincristine concentration of less than 0.5 muM. The inhibitory effect of vincristine increases as the extracellular alpha-aminoisobutyric acid concentration is increased reaching a maximum, however, of only approximately to 25% at a level of 5 mM, leaving a large gradient for alpha-aminoisobutyric acid across the cell membrane. Vincristine produced an asymmetrical uptake rate, while increasing the efflux of alpha-aminoisobutyric acid. Inhibition of net alpha-aminoisobutyric acid transport by vincristine was partially reversible (approximately to 40%). Colchicine (50 muM) reduced the steady-state alpha-aminoisobutyric acid level by 30%, an effect that was not reversible. Inhibition by Vinleurosine and vinrosidine was comparable to that of vincristine. Addition of glucose to the medium resulted in a small, but significant, decrease in the inhibitory effects of both vincristine and colchicine. The data indicate that these agents inhibit a small component of the uphill transport of alpha-aminoisobutyric acid in Ehrlich ascites tumor cells. The inhibitory effect of vincristine cannot be attributed to an increase in the passive permeability of the cell membrane to this agent. Rather, the data along with other studies from this laboratory suggest that vincristine reduces the energy-dependent transport of alpha-aminoisobutyric acid by either inhibiting cellular energy metabolism or by inhibiting cellular energy metabolism or by inhibiting the coupling of energy-metabolism to the transport of this amino acid and raises the possibility that cellular microtubules play a role in these processes.
Source	Natural Products > Apocynaceae > Catharanthus

Molecular Weight	808.973
Formula	C46H56N4O9
CAS No.	23360-92-1

Storage

Powder: -20°C for 3 years | In solvent: -80°C for 1 year

References and Literature

1. A reduction in energy-dependent amino acid transport by microtubular inhibitors in Ehrlich ascites tumor cells.J Cell Physiol. 1975 Oct;86(2 Pt 1):201-11.

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Vinleurosine 23360-92-1 Others inhibitor inhibit

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