U.S. Department of Health & Human Services Divider Arrow National Institutes of Health Divider Arrow NCATS

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Showing 671 - 680 of 2687 results

Status:
Other

Class (Stereo):
CHEMICAL (ABSOLUTE)

Tunicamycin VII is nucleotide sugar analogs produced by several Streptomyces species. In eukaryotes, Tunicamycin VII inhibit UDP-N-acetylglucosamine-dolichol phosphate GlcNAc-1-P transferase (GPT) that catalyzes the first step in protein glycosylation. In bacteria they inhibit UDP-N-acetylmuramoyl-pentapeptide: undecaprenol phosphate MurNAc-pentapeptide-1-P transtransferase (MraY) that catalyzes an early stage in peptidoglycan cell wall assembly. Tunicamycins are substrate analog of GPT and MraY, such that the alphabeta-1'',11'-linked GlcNAc residue of the tunicamycins mimics the transferred GlcNAc-1-phosphate. Tunicamycin VII impairs ALK phosphorylation and disrupts pro-survival signaling and cell viability in various neuroblastoma cell lines. A few studies suggest that tunicamycin may work as a therapeutic drug to cancer cells as it has been shown to sensitize human colon and prostate cancer cells to TRAIL-induced apoptosis.
Status:
Other

Class (Stereo):
CHEMICAL (ABSOLUTE)

Conditions:

There is no information related to the biological and pharmacological application of estradiol 17-phosphate.
Status:
Other

Class (Stereo):
CHEMICAL (ACHIRAL)

Tri-p-cresyl phosphate is a nonneurotoxic regioisomer of tri-o-cresyl phosphate and a congener of tri-p-ethylphenyl phosphate. Patch tests (triphenyl phosphate allergy) with analytical grade triphenyl phosphate, tri-m-cresyl phosphate, and tri-p-cresyl phosphate in the concentrations 5%, 0.5% and 0.05% pet. showed positive reactions to 0.05% triphenyl phosphate and 0.5% tri-m-cresyl phosphate, but no reaction to tri-p-cresyl phosphate.
Status:
Other

Class (Stereo):
CHEMICAL (RACEMIC)

Status:
Other

Class (Stereo):
CHEMICAL (ABSOLUTE)


Conditions:

(R)-carvedilol, an enantiomer of the drug carvedilol, which is used in the treatment of mild to moderate congestive heart failure. (R)-carvedilol is an alpha adrenergic receptor blocker. It was shown, that (R)-carvedilol increased sympathetic tone, presumably as a physiological reaction to the decrease in blood pressure caused by alpha-blockade. The weak clinical net effect of beta-blockade of (R, S)-carvedilol at rest might be one reason why this drug causes fewer side effects than other beta-blockers, such as a reduction of nocturnal melatonin release.