Idioma:

1,25-dihydroxyvitamin D3-induced apoptosis of retinoblastoma cells is associated with reciprocal changes of Bcl-2 and bax

WAGNER, Nicole ; WAGNER, Kay-Dietrich ; SCHLEY, Gunnar ; BADIALI, Lucia ; THERES, Heinz ; SCHOLZ, Holger

Experimental eye research, 2003-07, Vol.77 (1), p.1-9 [Periódico revisado por pares]

London: Elsevier

Texto completo disponível

Citações Citado por

Enviar para

Título:
1,25-dihydroxyvitamin D3-induced apoptosis of retinoblastoma cells is associated with reciprocal changes of Bcl-2 and bax
Autor: WAGNER, Nicole ; WAGNER, Kay-Dietrich ; SCHLEY, Gunnar ; BADIALI, Lucia ; THERES, Heinz ; SCHOLZ, Holger
Assuntos: Analysis of Variance ; Antineoplastic Agents - pharmacology ; Apoptosis ; bcl-2-Associated X Protein ; Biological and medical sciences ; Calcitriol - analogs & derivatives ; Calcitriol - pharmacology ; Calcitriol - therapeutic use ; Cell Cycle - drug effects ; Dose-Response Relationship, Drug ; Fundamental and applied biological sciences. Psychology ; Humans ; Immunohistochemistry - methods ; In Situ Nick-End Labeling ; Interphase ; Proto-Oncogene Proteins - analysis ; Proto-Oncogene Proteins - metabolism ; Proto-Oncogene Proteins c-bcl-2 - analysis ; Proto-Oncogene Proteins c-bcl-2 - metabolism ; Receptors, Calcitriol - genetics ; Retinal Neoplasms - chemistry ; Retinal Neoplasms - drug therapy ; Retinal Neoplasms - pathology ; Retinoblastoma - chemistry ; Retinoblastoma - drug therapy ; Retinoblastoma - pathology ; Reverse Transcriptase Polymerase Chain Reaction ; RNA, Messenger - analysis ; Time Factors
É parte de: Experimental eye research, 2003-07, Vol.77 (1), p.1-9
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: The active vitamin D metabolite 1,25-dihydroxyvitamin D(3) (1,25-(OH)(2)D(3)) and related substances have previously been tested in tissue culture and animal models of retinoblastoma for their use as anti-tumor drugs. However, despite of the potential therapeutic value, the molecular mechanisms through which 1,25-(OH)(2)D(3) inhibits the growth of retinoblastoma cells are incompletely understood. To elucidate possible signalling pathways for the anti-proliferative action of vitamin D compounds in retinal tumor cells, we analyzed the effect of 1,25-(OH)(2)D(3) and its synthetic analogue KH1060 on the growth of human retinoblastoma-derived Y79 cells. Vitamin D receptor (VDR) mRNA was detected by reverse transcription PCR in Y79 cells and in tissue specimens of human retinoblastoma. VDR transcripts were confirmed at the protein level by strong immunostaining of solid retinal tumors for VDR. Incubation with 1,25-(OH)(2)D(3) and KH1060 (10(-10)-10(-6)moll(-1)) decreased the number of Y79 cells in a timely and dose-dependent manner. Treatment with 1,25-(OH)(2)D(3) (10(-10)moll(-1)) for 24 hr caused cell cycle arrest in the G0/1 phase. Apoptosis of Y79 cells in response to 1,25-(OH)(2)D(3) was demonstrated by the means of TdT-dUTP terminal nick-end labelling (TUNEL), annexin V staining, and detection of DNA fragmentation on agarose gels. 1,25-(OH)(2)D(3)-induced programmed death of Y79 cells was accompanied by a concentration-dependent increase in Bax protein and a reduction in Bcl-2 content. These findings suggest that 1,25-(OH)(2)D(3) inhibits the growth of retinoblastoma cells by causing cell cycle arrest and apoptosis. 1,25-(OH)(2)D(3)-induced programmed death of retinoblastoma cells appears to involve reciprocal changes in Bcl-2 and Bax proteins.
Editor: London: Elsevier
Idioma: Inglês

Links

Voltar para lista de resultados

Resultado 1 Avançar Ir para próxima página

Realização: Logos de Redes Sociais:

1,25-dihydroxyvitamin D3-induced apoptosis of retinoblastoma cells is associated with reciprocal changes of Bcl-2 and bax

WAGNER, Nicole ; WAGNER, Kay-Dietrich ; SCHLEY, Gunnar ; BADIALI, Lucia ; THERES, Heinz ; SCHOLZ, Holger

London: Elsevier

Buscando em bases de dados remotas. Favor aguardar.