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1.
Blood Purif ; 35(1-3): 187-95, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23485859

RESUMO

BACKGROUND: The effects of vitamin D receptor (VDR) and osteocalcin (OC) expression as well as VDR agonist (VDRA) therapy on circulating endothelial progenitor cells (EPCs) has not been elucidated yet. METHODS: We therefore analyzed EPCs in 30 healthy controls and 82 patients undergoing dialysis (no VDRA therapy: 28; oral calcitriol: 30, and intravenous paricalcitol, PCTA: 24). The percentage of EPCs (CD34+/CD133-/KDR+/CD45-) expressing VDR or OC, and VDR and OC expression defined by mean fluorescence intensity (MFI) were analyzed using flow cytometry. The in vitro effect of VDRAs was evaluated in EPCs isolated from each patient group. RESULTS: The percentage of VDR+ EPCs correlated positively with VDRA therapy and 25(OH)D, and negatively with diabetes, C-reactive protein, hemoglobin and osteopontin. VDR-MFI correlated positively with VDRA therapy, parathyroid hormone (PTH) and 25(OH)D, and negatively with diabetes and osteopontin. The percentage of OC+ EPCs correlated positively with the calcium score, PTH and phosphate, and negatively with 25(OH)D. OC-MFI correlated positively with calcium score, PTH, phosphate and hemoglobin, and negatively with albumin, 25(OH)D and osteopontin. Cell cultures from patients without VDRA therapy had the highest levels of calcium deposition and OC expression, which both significantly decreased following in vitro VDRA administration: in particular extracellular calcium deposition was only reduced by adding PCTA. CONCLUSIONS: Our data suggest that 25(OH)D serum levels and VDRA therapy influence VDR and OC expression on circulating EPCs. Since OC expression may contribute to vascular calcification, we hypothesize a putative protective role of VDRA therapy.


Assuntos
Células Endoteliais/efeitos dos fármacos , Complexo Mediador/farmacologia , Osteocalcina/genética , Receptores de Calcitriol/genética , Diálise Renal , Insuficiência Renal Crônica/tratamento farmacológico , Células-Tronco/efeitos dos fármacos , 25-Hidroxivitamina D 2/sangue , Antígenos CD/sangue , Antígenos CD/genética , Proteína C-Reativa , Cálcio/sangue , Estudos de Casos e Controles , Células Endoteliais/metabolismo , Células Endoteliais/patologia , Regulação da Expressão Gênica/efeitos dos fármacos , Humanos , Osteocalcina/sangue , Osteopontina/sangue , Osteopontina/genética , Hormônio Paratireóideo/sangue , Hormônio Paratireóideo/genética , Receptores de Calcitriol/sangue , Insuficiência Renal Crônica/sangue , Células-Tronco/metabolismo , Células-Tronco/patologia
4.
5.
Leuk Lymphoma ; 47(3): 469-72, 2006 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-16396770

RESUMO

The (1;19)(q23;p13) translocation, leading to the production of the E2A/PBX1 fusion transcript, is one of the most common translocations in pediatric B-lineage acute lymphoblastic leukemia (ALL). It was assumed to be associated with a poor clinical outcome, although intensive therapy and bone marrow transplantation have been shown to be able to overcome the negative prognostic impact. Only few data are available concerning t(1;19)(q23;p13) in adult ALL. In particular, the prognostic significance of this genetic aberration is not yet clear. We describe three cases of adult ALL carrying the t(1;19)(q23;p13), who were all characterized by an aggressive clinical course and short survival, and discuss the molecular features of the disease as recently identified by gene expression profiling.


Assuntos
Cromossomos Humanos Par 19/genética , Cromossomos Humanos Par 1/genética , Leucemia-Linfoma Linfoblástico de Células Precursoras/genética , Leucemia-Linfoma Linfoblástico de Células Precursoras/terapia , Translocação Genética , Adulto , Transplante de Medula Óssea , Análise Citogenética , Evolução Fatal , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Leucemia-Linfoma Linfoblástico de Células Precursoras/diagnóstico , Prognóstico , Recidiva , Falha de Tratamento
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