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retinoblastoma/protease
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Sivu 1 alkaen 95 tuloksia
A retinoblastoma susceptibility gene product, RB, targeting protease is regulated through the cell cycle.
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Degradation of cyclin B and cyclin-dependent kinase inhibitor, p27, at a specific time has been shown to play a critical role in regulating the cell cycle. SPase, a nuclear and cytosol protease with cathepsin B- and L-like proteolytic activity, has been identified in several cell lines. This
Inactivation of the retinoblastoma tumor suppressor induces apoptosis protease-activating factor-1 dependent and independent apoptotic pathways during embryogenesis.
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Inactivation of the retinoblastoma (Rb) tumor suppressor in the mouse induces mid-gestational death accompanied by massive apoptosis in certain tissues. Herein, we analyzed the role of the apoptosis protease-activating factor Apaf-1, an essential component of the apoptosome, in mediating apoptosis
A unique cathepsin-like protease isolated from CV-1 cells is involved in rapid degradation of retinoblastoma susceptibility gene product, RB, and transcription factor SP1.
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The regulation of transcription factors by kinase or phosphatase has been well-described. However, little is known about the inactivation of transcription factors or the nuclear regulators by proteolytic degradation. In this report, we purified a specific protease, SPase, from nuclear extracts of
Failure to activate interleukin 1beta-converting enzyme-like proteases and to cleave retinoblastoma protein in drug-resistant cells.
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We previously found that retinoblastoma (RB) is cleaved at the initiation of apoptotic execution. Here we report that when an HL-60 cell line resistant to cytosine arabinoside (Ara-C) was exposed to this anticancer drug, neither RB cleavage nor apoptosis was detected. Consistent with that,
Cleavage of retinoblastoma protein during apoptosis: an interleukin 1 beta-converting enzyme-like protease as candidate.
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We had found that in an early stage of DNA damage-induced, p53-independent apoptosis, retinoblastoma (RB) protein is hypophosphorylated to a p115 form by an activated serine/threonine phosphatase. Here, we report that accompanying the internucleosomal fragmentation of DNA, the newly formed
Human papillomavirus E7 requires the protease calpain to degrade the retinoblastoma protein.
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Cervical cancers transformed by high risk human papilloma virus (HPV) express the E7 oncoprotein, which accelerates the degradation of the retinoblastoma protein (Rb). Here we show that the E7-mediated degradation of Rb requires the calcium-activated cysteine protease, calpain. E7 bound and
Posttranslational regulation of the retinoblastoma gene family member p107 by calpain protease.
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The retinoblastoma protein plays a critical role in regulating the G1/S transition. Less is known about the function and regulation of the homologous pocket protein p107. Here we present evidence for the posttranslational regulation of p107 by the Ca2+-activated protease calpain. Three negative
Specific cleavage of the retinoblastoma protein by an ICE-like protease in apoptosis.
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Interleukin 1beta-converting enzyme-like (ICE-like) proteases are important mediators of apoptosis in diverse cell types and organisms. However, the role of these proteases in apoptosis cannot be satisfactorily explained on the basis of the physiological functions of their known substrates. Here we
Bcl-2- and CrmA-inhibitable dephosphorylation and cleavage of retinoblastoma protein during etoposide-induced apoptosis.
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Cell numbers are regulated by a balance between proliferation and apoptosis (programmed cell death). Recent evidence suggests that proteins regulating cell proliferation also mediate apoptosis. Therefore, cellular fate might be determined by cross talk between regulators of cell cycle progression
Retinoblastoma protein-dependent growth signal conflict and caspase activity are required for protein kinase C-signaled apoptosis of prostate epithelial cells.
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Both protein kinase C and the retinoblastoma tumor suppressor protein have been linked to the regulation of cell growth and cell death, suggesting the differential roles these factors play in mediating cell fate. In some cells, protein kinase C-induced activation of the retinoblastoma protein
Glycosaminoglycans in human retinoblastoma cells: heparan sulfate, a modulator of the pigment epithelium-derived factor-receptor interactions.
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BACKGROUND
Pigment epithelium-derived factor (PEDF) has binding affinity for cell-surface receptors in retinoblastoma cells and for glycosaminoglycans. We investigated the effects of glycosaminoglycans on PEDF-receptor interactions.
RESULTS
125I-PEDF formed complexes with protease-resistant
A masked initiation region in retinoblastoma protein regulates its proteasomal degradation.
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Retinoblastoma protein (Rb) is a tumor suppressor that binds and represses E2F transcription factors. In cervical cancer cells, human papilloma virus (HPV) protein E7 binds to Rb, releasing it from E2F to promote cell cycle progression, and inducing ubiquitination of Rb. E7-mediated proteasomal
The role of retinoblastoma protein in apoptosis.
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The retinoblastoma gene and its protein product (Rb) have been studied intensively for their role in development, oncogenesis, cell growth, differentiation and cell cycle regulation. In addition, Rb appears to be a key factor in protecting cells from apoptosis. It is likely that Rb plays an
The retinoblastoma gene product RB stimulates Sp1-mediated transcription by liberating Sp1 from a negative regulator.
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Studies have demonstrated that the retinoblastoma susceptibility gene product, RB, can either positively or negatively regulate expression of several genes through cis-acting elements in a cell-type-dependent manner. The nucleotide sequence of the retinoblastoma control element (RCE) motif, GCCACC
Enhanced in vitro antiproliferative effects of EpCAM antibody-functionalized paclitaxel-loaded PLGA nanoparticles in retinoblastoma cells.
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BACKGROUND
To specifically deliver paclitaxel (PTX) to retinoblastoma (RB) cells, the anionic surface-charged poly(lactic-co-glycolic acid) (PLGA) NPs loaded with paclitaxel were conjugated with epithelial cell adhesion molecule (EpCAM) antibody for enhancing site-specific intracellular delivery of
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