
IndraLab
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"Recent studies have also shown that a single nucleotide polymorphism (SNP) in the MDM2 promoter (SNP309), which slightly increases MDM2 levels (by ~ 2-fold), significantly impacts upon tumorigenesis through attenuating p53 function in both human beings and animal models [XREF_BIBR, XREF_BIBR]."
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"Since the overexpression of MDM2 has
been shown in several human tumors, and increased expression of MDM2 inactivates the
apoptotic and cell cycle arrest function of p53, the expression of MDM2 in long-term
H. pylori-infected gastric mucosa may indicate a risk for carcinogenesis,
and IL-16 secretion in H. pylori-infected mucosa could well be one of the
factors promoting gastric carcinogenesis."
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"It is worth noting that the SNP309G polymorphism in the MDM2 promoter modestly increases MDM2 mRNA levels (approximately 2 fold) and is associated with an increased risk for development of cancer.31-34 Further in vivo studies using genetically engineered mice carrying one of these point mutations may determine whether, like SNP309G, these mutations can promote tumor development."
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"The importance of MDM2 in neuroblastoma pathogenesis is further illustrated by studies which have observed that a SNP within the MDM2 promoter (SNP309 T to G) that can lead to higher expression of MDM2 and greater inhibition of p53, is associated with poor survival in neuroblastoma, in particular stage 4 patients with MYCN amplification."
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"Two MDM2 SiRNAs and an MDM2 plasmid were transfected into HCs, which significantly decreased MDM2 mRNA expression or increased MDM2 expression but did not affect FASN mRNA levels (Supplementary Fig. 13a), suggesting MDM2 regulates FASN post-translationally.To date, post-translational regulation of FASN has been the primary focus of research."
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"There are a number of pre-clinical studies demonstrating the promise of targeting MDM2 via PPIs in cancers with either high endogenous MDM2 expression or targeting MDM2 following induction of MDM2 expression via DNA damaging agents [XREF_BIBR, XREF_BIBR, XREF_BIBR, XREF_BIBR, XREF_BIBR, XREF_BIBR, XREF_BIBR]."
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"A MDM2 single nucleotide polymorphism at the 309 th nucleotide in the first intron (rs2279744), with a T to G change, could increase the affinity for stimulatory protein (Sp) 1 binding and result in increased MDM2 expression and subsequent attenuation of the P53 pathway XREF_BIBR."
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"RNA interference showed that p53 knockdown increased the protein level of Gli1 but decreased the level of MDM2, and enhanced cell invasion and migration in wild-type p53 Capan-2 cells; whereas Gli1 or MDM2 knockdown did not change p53 expression, but decreased the protein level of MDM2 or Gli1, respectively, and inhibited cell invasion and migration in mutant p53 PANC-1 cells."
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"The results showed that MDM2 and p53 protein levels were increased in Lenti-Vector cells upon the addition of Nutlin-3a because Nutlin-3a suppressed MDM2 binding to p53, thus inhibiting the translocation and ubiquitination of MDM2 and p53, which subsequently increased MDM2 and p53 levels."
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"As shown in XREF_FIG, the expression of MDM2 in A549 cells was upregulated to 1.5 times that in the negative control group (P = 0.003) after inhibitor-miR1273f transfection, and mimic-miR1273f transfection significantly downregulated the expression of MDM2 to 2/3 of that in negative control group (P = 0.035)."
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"RPS27a knockdown increased the expression of MDM2 and p53 (Fig. 4E; comparison of lane 3 with lane 2 in lower panels), MDM2 ubiquitinated p53, whereas RPS27a knockdown inhibited this ubiquitination that led to p53 accumulation (Fig. 4E; comparison of lane 3 with lane 2 in upper panel)."