Résumé
<p><b>OBJECTIVE</b>To access the capability of 1H nuclear magnetic resonance (NMR) -based metabonomics in the evaluation of graft function in the perioperation period of liver transplantation.</p><p><b>METHODS</b>Plasma samples of 15 male primary hepatic carcinoma patients were collected for clinical biochemical analysis and 1H NMR spectroscopy 1 day before operation, 1 day and 1 week after the operation. The NMR data were analyzed using principal component analysis.</p><p><b>RESULTS</b>Metabonomic analysis indicated that, compared with those before operation, blood concentrations of valine, alanine, acetone, succinic acid, glutamine, choline, lactate, and glucose increased significantly 1 day after transplantation. One week later, the levels of lipids and choline increased notably, while those of glucose and amino acids decreased. Principal component analysis showed significant difference between metabolic profiles of plasma samples of variant periods of liver transplantation, due to the variation of the levels of glucose, lipids, lactate, and choline. A good agreement was observed between clinical chemistry and metabonomic data.</p><p><b>CONCLUSIONS</b>Metabonomic analysis can clearly identify the difference between the plasma samples of primary hepatic carcinoma patients at different time during the perioperation period of liver transplantation. It therefore may be a promising new technology in predicting the outcomes of liver transplantation.</p>
Sujets)
Humains , Mâle , Acétone , Sang , Chimie , Alanine , Sang , Chimie , Marqueurs biologiques , Sang , Chimie , Glycémie , Chimie , Métabolisme , Carcinomes , Sang , Chimie , Chirurgie générale , Choline , Sang , Chimie , Glutamine , Sang , Chimie , Acide lactique , Sang , Chimie , Foie , Métabolisme , Tumeurs du foie , Sang , Chimie , Chirurgie générale , Transplantation hépatique , Physiologie , Spectroscopie par résonance magnétique , Métabolome , Acide succinique , Sang , Chimie , Résultat thérapeutique , Valine , Sang , ChimieRésumé
To investigate the inhibiting effect of arsenic trioxide (As(2)O(3)) on the telomerase activity of leukemia cell lines NB4 and Jurkat cells, MTT assay, electrophoresis of genomic DNA, protein/DNA dual parameter flow cytometry as well as a semi-quantitative telomeric repeat amplification protocol (TRAP) assay and RT-PCR were used to examine the effect of As(2)O(3) on cell proliferation, telomerase activity and expression of cell cycle regulatory proteins. The results showed that cell proliferation and telomerase activity were significantly inhibited and apoptosis was induced in these cells after exposure to As(2)O(3). Furthermore, the expression of some cell cycle and apoptosis related proteins, such as Bcl-2, Rb, P16, caspase-3, cyclin A and cyclin E, was altered in As(2)O(3) treated NB4 cells. Cell cycle was arrested at G(1) and G(2)/M phases in both cells. It is concluded that the change of cell cycle regulatory proteins plays an important role in decline of the telomerase activity during the proliferation inhibition and apoptosis of NB4 and Jurkat cells induced by As(2)O(3).