Understanding the Thalidomide Chirality in Biological Processes …
2018年11月20日 · We hypothesize that a fraction of thalidomide enantiomers epimerizes in vivo, followed by precipitation of racemic thalidomide in (R / S)-heterodimeric form. Thus, racemic thalidomide is most...
Thalidomide - American Chemical Society
2010年5月17日 · Thalidomide exists in two mirror-image forms: it is a racemic mixture of (R)- and (S)-enantiomers. The (R)-enantiomer, shown in the figure, has sedative effects, whereas the (S)-isomer is teratogenic. Under biological conditions, the isomers interconvert, so separating the isomers before use is ineffective.
Structural basis of thalidomide enantiomer binding to cereblon
2018年1月22日 · Here, we report on a series of crystallographic and biochemical studies investigating the interaction between each thalidomide enantiomer and CRBN, and provide a structural basis for the ...
Death and Rebirth of the Thalidomide Molecule: A Case of Thalidomide …
Thalidomide exists as a racemic mixture of two enantiomers that exist as mirror images of each other. These images are non-superimposable, a phenomenon known in physics as parity.
Thalidomide: History of Research and Perspectives for Its
1 天前 · Thalidomide is a synthetic derivative of glutamic acid with one chiral center and consists of glutarimide and phthalimide rings (α-N-phthalimidoglutarimide) (Fig. 1).The IUPAC systematic name is 3-(RS)-2-(2,6-dioxo-3-piperidyl)-isoindole-1,3-dione.The substance exists as optically active R(+) and S(-) enantiomers, which rapidly interconvert in vivo, and as an optically inactive racemic mixture.
enantiomerically pure thalidomide remains in solution, aording the observed biological experimental results: the (S)-enantiomer is teratogenic, while the (R)-enantiomer is not.
The thalidomide molecule is a racaemic glutamic acid analogue, consisting of S(–) and R(+) enantiomers that interconvert under physiological conditions (figures 1 and 2).7 The S(–) form potently inhibits release of tumour necrosis factor (TNF) from peripheral.
Thalidomide - Wikipedia
Thalidomide is provided as a racemic mixture of two enantiomers; while there are reports that only one of the enantiomers may cause birth defects, the body converts each enantiomer into the other through mechanisms that are not well understood. [22]
Understanding the Thalidomide Chirality in Biological Processes …
2018年11月20日 · The biochemical studies were carried out on deuterium-substituted enantiomers of thalidomide 29 to suppress any enantiomeric interconversion. The results revealed that the (S)-enantiomer of 1 displayed a 10-fold stronger binding to CRBN and inhibition of self-ubiquitylation compared to the (R)-isomer.
Structural basis of thalidomide enantiomer binding to cereblon
Here, we report on a series of crystallographic and biochemical studies investigating the interaction between each thalidomide enantiomer and CRBN, and provide a structural basis for the differences in CRBN binding and stereospecific effects of thalidomide on teratogenicity.