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PMID |
Sentence |
1 |
15563594
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A requirement for breast-cancer-associated gene 1 (BRCA1) in the spindle checkpoint.
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2 |
15563594
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By using a mouse model deficient for Brca1 full-length isoform (Brca1(Delta11/Delta11)), we found that Brca1(Delta11/Delta11) cells displayed decreased expression of a number of genes that are involved in the spindle checkpoint, including Mad2, which is a key component of spindle checkpoint that inhibits anaphase-promoting complex.
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3 |
15563594
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We showed that Brca1(Delta11/Delta11) cells failed to arrest at metaphase in the presence of nocodazole and underwent apoptosis because of activation of p53.
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4 |
15563594
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Consistently, reconstitution of Mad2 in Brca1(Delta11/Delta11) cells partially restored the spindle checkpoint and attenuated apoptosis.
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5 |
15563594
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By using UBR60 cells, which carry tetracycline-regulated expression of BRCA1, we demonstrated that BRCA1 binds to transcription factor OCT-1 and up-regulates the transcription of MAD2.
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6 |
15563594
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Furthermore, we showed that the induction of BRCA1 to endogenous MAD2 or transfected MAD2 luciferase reporter in UBR60 cells was completely inhibited by acute suppression of BRCA1 by RNA interference.
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7 |
15563594
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These data reveal a role of BRCA1 in maintaining genome integrity by interplaying with p53 and genes that are involved in the spindle checkpoint and apoptosis.
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8 |
16211273
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Germline mutations of breast cancer-associated gene 1 (BRCA1) predispose women to breast and ovarian cancer.
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9 |
16211273
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To model human BRCA1 carriers, our laboratory has previously created mice with a conditional knockout of the full-length BRCA1 gene in the mammary epithelium combined with a heterozygous knockout of the p53 tumor suppressor gene.
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10 |
16211273
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Oophorectomized mice with a conditional knockout of full-length BRCA1 in conjunction with a loss of one p53 allele exhibited glandular regression with a reduction in the number of mammary epithelial cells following oophorectomy.
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11 |
16522651
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Germline mutations of the breast cancer associated gene 1 (BRCA1) predispose women to breast and ovarian cancers.
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12 |
16849561
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Absence of the full-length breast cancer-associated gene-1 leads to increased expression of insulin-like growth factor signaling axis members.
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13 |
16849561
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The breast cancer-associated gene-1 (BRCA1) plays many important functions in multiple biological processes/pathways.
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14 |
16849561
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Here, we show that Brca1 deficiency leads to increased expression of several insulin-like growth factor (IGF) signaling axis members in multiple experimental systems, including BRCA1-deficient mice, primary mammary tumors, and cultured human cells.
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15 |
16849561
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Furthermore, we provide evidence that activation of IGF signaling by BRCA1 deficiency can also occur in a p53-independent fashion.
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16 |
16849561
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Our data indicate that BRCA1 interacts with the IRS-1 promoter and inhibits its activity that is associated with epigenetic modification of histone H3 and histone H4 to a transcriptional repression chromatin configuration.
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17 |
16849561
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We further show that BRCA1-deficient mammary tumor cells exhibit high levels of IRS-1, and acute suppression of Irs-1 using RNA interference significantly inhibits growth of these cells.
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18 |
16849561
|
Absence of the full-length breast cancer-associated gene-1 leads to increased expression of insulin-like growth factor signaling axis members.
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19 |
16849561
|
The breast cancer-associated gene-1 (BRCA1) plays many important functions in multiple biological processes/pathways.
|
20 |
16849561
|
Here, we show that Brca1 deficiency leads to increased expression of several insulin-like growth factor (IGF) signaling axis members in multiple experimental systems, including BRCA1-deficient mice, primary mammary tumors, and cultured human cells.
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21 |
16849561
|
Furthermore, we provide evidence that activation of IGF signaling by BRCA1 deficiency can also occur in a p53-independent fashion.
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22 |
16849561
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Our data indicate that BRCA1 interacts with the IRS-1 promoter and inhibits its activity that is associated with epigenetic modification of histone H3 and histone H4 to a transcriptional repression chromatin configuration.
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23 |
16849561
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We further show that BRCA1-deficient mammary tumor cells exhibit high levels of IRS-1, and acute suppression of Irs-1 using RNA interference significantly inhibits growth of these cells.
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24 |
16906222
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PARP-1 inhibitors: are they the long-sought genetically specific drugs for BRCA1/2-associated breast cancers?
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25 |
16906222
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Recent studies demonstrated that PARP-1 [poly(ADP-ribose) polymerase-1] inhibitors kill breast cancer associated gene-1 and -2 (BRCA1/2) deficient cells with extremely high efficiency while BRCA+/- and BRCA+/+ cells are relatively non-responsive to the treatment.
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26 |
16906222
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It was therefore proposed that PARP-1 inhibitors might be the long-sought genetically specific drugs that are both safe and effective for treating BRCA1/2-associated breast cancers.
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27 |
16906222
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However, a report published in a recent issue of the International Journal of Biological Sciences revealed that PARP-1 inhibitors, although able to kill naïve BRCA1 mutant cells with high specificity both in vitro and in vivo, exhibit minimal specificity in inhibiting the growth of mouse mammary tumor cells irrespective of their BRCA1 status in allograft nude mice.
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28 |
16906222
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Non-specific inhibition in human BRCA1+/+, BRCA1+/-, and BRCA1-/- breast cancer cells by PARP-1 inhibitors was also observed.
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29 |
16906222
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Additional mutations occurring during cancer progression may be a culprit, although the exact cause for the resistance of BRCA1-/- breast cancer cells to PARP-1 inhibitors remains elusive.
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30 |
17363841
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We have shown previously that mice, which are homozygous for full-length breast cancer-associated gene-1 (Brca1) deletion and heterozygous for a p53-null mutation (Brca1(Delta11/Delta11)p53(+/-)), display premature aging and high frequency of spontaneous lymphoma and mammary tumor formation.
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31 |
17363841
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Brca1(Delta11/Delta11)p53(+/-) mice showed altered gastrointestinal tract homeostasis, including hyperkeratosis in the esophagus and forestomach.
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32 |
17363841
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Brca1 mutant mice exhibited increased expression of Redd1, elevated reactive oxygen species and are more sensitive to oxidative stress induced lethality.
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33 |
17363841
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Our further analysis revealed that the tumorigenesis is accompanied by the loss of p53 and increased expression of a number of oncogenes, including Cyclin D1, phosphorylated form of Akt, beta-catenin, Runx-2 and c-Myc.
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34 |
19075671
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In most cases, they can be attributed to mutations in the breast cancer associated gene 1 and 2 (BRCA1 and BRCA2).
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35 |
19075671
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Recent studies have demonstrated a link between the insulin-like growth factor (IGF) signaling pathway and familial breast cancer incidence.
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36 |
21666725
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Yin Yang 1 positively regulates BRCA1 and inhibits mammary cancer formation.
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37 |
21666725
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Expression of the breast cancer-associated gene 1 (BRCA1) in sporadic breast cancers is usually reduced, yet the underlying mechanisms remains elusive.
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38 |
21666725
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Among several potential regulators, the Gli-Krueppel-related transcription factor Yin Yang 1 (YY1) showed the most dramatic transactivation of the BRCA1 promoter.
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39 |
21666725
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YY1 binds to the promoter of BRCA1, and its overexpression resulted in increased expression of BRCA1 and a number of BRCA1 downstream genes.
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40 |
21666725
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To assess the clinical relevance between YY1 and BRCA1, we studied expression of YY1 and BRCA1 from human breast cancer samples and tissue arrays, and detected a significant positive correlation between the level of YY1 and BRCA1 expression in these cancers.
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41 |
21666725
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Taken together, these findings suggest that YY1 is a key regulator of BRCA1 expression and may be causally linked to the molecular etiology of human breast cancer.
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42 |
23093327
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Germline mutations of human breast cancer-associated gene 1 (BRCA1) predispose women to breast and ovarian cancers.
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