ABSTRACT
The arsenic species in rat plasma were studied after oral administration of realgar and Niu Huang Jie Du Pian (NHJDP) and the possible compatible effects of realgar was evaluated by comparing the pharmacokinetics of arsenic species after administration of realgar and NHJDP. The separation of the arsenicals was performed by a high performance liquid chromatography-hydride generation-atomic fluorescence spectrometry (HPLC-HG-AFS) technique. Dimethylarsinic acid (DMA) was found to be the main species in rats' plasma after dosing. No traces of arsenite[As(Ⅲ)], monomethylarsonic acid (MMA) or arsenate[As(V)] were detected at any sampling time points. Compared with realgar administration alone, dose-normalized peak concentration (Cmax) and AUC0-t of DMA were significantly decreased by NHJDP administration, while the tmax was significantly delayed with the clearance and apparent volume of distribution significantly increased, indicating that the pharmacokinetics of As from realgar was affected by other ingredients in the compound prescription of NHJDP.
ABSTRACT
This study was purposed to comparatively analyze the early T-lymphocyte subsets and T-cell receptor excision cycles (TREC) reconstruction in recipients with hematologic malignancies after myeloablative unrelated cord blood transplantation (UCBT) and sibling donor bone marrow and/or peripheral blood stem cell transplantation (BMT/PBSCT). The peripheral blood T lymphocyte subsets were detected using flow cytometry and TREC were detected using real-time quantitative PCR for 40 patients with hematologic malignancies in the first six months after myeloablative allogenic hematopoietic stem cell transplantation. The results showed that in the first month after transplantation, the absolute counts of CD3(+), CD3(+) CD4(+), CD3(+) CD8(+) cells were lower significantly in the UCBT group than those in the BMT/PBSCT group. And later the absolute counts of CD3(+), CD3(+)CD4(+), CD3(+)CD8(+) cells were not different between two groups. The ratio of CD3(+)T subset in the peripheral blood lymphocytes of the UCBT recipients was lower, but the difference was not statistically significant within 2 months after transplantation. The ratio of CD3(+)CD4(+) cells in the patients received the UCBT and BMT/PBSCT decreased obviously since engraftment happened. The CD3(+)CD4(+) cells on the 2 months after transplantation fell to the lowest level, then gradually increased, but did not reach to the normal level until 6 months after transplantation. CD3(+)CD8(+)cells were well reconstituted, rising to normal at the engraftment after transplantation, with a low CD4(+): [KG-*2] CD8(+) ratio over the first 6 months after transplantation. Compared with the BMT/ PBSCT group, the naive T cells (CD3(+)CD4(+)CD45RA(+)CD62L(+)) were more in the first month after transplantation and the terminally differentiated effector memory T cells (CD3(+)CD4(+)CD45RA(+)CD62L(-)) were more at the 3 month after transplantation in the UCBT group, and those were significantly more than the normal control group. TREC were lower and did not recovered until 6 months after transplantation in the recipients of the two groups. It is concluded that compared with sibling donor's BMT/PBSCT, early T cell reconstitution significantly delayed after UCBT, but the terminally differentiated effector memory T cells are higher after transplantation, and thus play a anti-infective or anti-leukemia role.
Subject(s)
Adolescent , Adult , Child , Child, Preschool , Female , Humans , Male , Young Adult , Fetal Blood , Transplantation , Hematopoietic Stem Cell Transplantation , Methods , Receptors, Antigen, T-Cell , Allergy and Immunology , T-Lymphocyte Subsets , Allergy and ImmunologyABSTRACT
0.05). After dividing the patients into early-onset and late-onset subgroups, there were significant differences of DRD4 genotype and allele frequency between early-onset patients and controls (P0.05). Conclusion The results suggested that the polymorphism of DRD4 receptor gene may be associated with early-onset OCD. The 3/4 genetype may be the risk factor of early-onset OCD. Early-onset and late-onset OCD may have different etiology.