scholarly journals miR-199a-3p Inhibits Aurora Kinase A and Attenuates Prostate Cancer Growth

2014 ◽  
Vol 184 (5) ◽  
pp. 1541-1549 ◽  
Author(s):  
Yi Qu ◽  
Xiang Huang ◽  
Zhiqing Li ◽  
Junyan Liu ◽  
Jinlin Wu ◽  
...  
2011 ◽  
Vol 99 ◽  
pp. S386
Author(s):  
L. Moretti ◽  
K. Niermann ◽  
S. Schleicher ◽  
K.W. Kim ◽  
P. Kopsombut ◽  
...  

2013 ◽  
Vol 31 (15_suppl) ◽  
pp. TPS5096-TPS5096 ◽  
Author(s):  
Himisha Beltran ◽  
Mark A. Rubin ◽  
Juan Miguel Mosquera ◽  
Paul J. Christos ◽  
Olivera Calukovic ◽  
...  

TPS5096 Background: NEPC can rarely arise de novo but more commonly arises as a mechanism of resistance in the setting of advanced prostate cancer. Transformation to NEPC is likely promoted by potent hormonal therapies and is currently under-recognized. There is no effective therapy for NEPC and most patients (pts) survive less than one year. We have found that Aurora kinase A (AURKA) and N-myc (MYCN) are significantly overexpressed and amplified in NEPC compared to prostate adenocarcinoma, and cooperate to induce neuroendocrine (NE) differentiation in prostate cancer (Beltran et al, Cancer Disc 2011). In preclinical models, aurora kinase inhibition results in dramatic and preferential anti-tumor activity in NEPC. Methods: In this single arm, multi-institutional Phase II trial, pts with metastatic prostate cancer need to meet at least one NEPC entry criterion: 1) histologic diagnosis of small cell or NEPC, 2) >50% immunohistochemical staining for NE markers, 3) development of liver metastases in absence of PSA progression, or 4) serum chromogranin >5x normal or neuron specific enolase >2x normal. Study will be open at 10 institutions including PCCTC sites. After a mandatory on-study research biopsy, pts will be treated with MLN8237, an orally administered Aurora kinase A inhibitor at 50 mg twice daily for 7 days repeated every 21 days. The primary endpoint is objective response rate (ORR). Secondary endpoints include overall survival, progression free survival, PSA response rate, circulating tumor cell response, and serum NE marker response to therapy. A number of correlative studies including AURKA, MYCN, AR, and exome and RNAseq are embedded in this trial in order to molecularly define this aggressive and poorly characterized disease. A Simon 2-stage design will be employed with up to 60 subjects providing 80% power to determine if the true ORR is >30% and 95% power if the true ORR is <15%, assuming a 5% level of significance. A subset of at least 20% meeting histologic entry criteria is embedded.


2008 ◽  
Vol 15 (8) ◽  
pp. 517-525 ◽  
Author(s):  
Y Qu ◽  
L Zhang ◽  
M Mao ◽  
F Zhao ◽  
X Huang ◽  
...  

2016 ◽  
Vol 27 ◽  
pp. vi565 ◽  
Author(s):  
H. Beltran ◽  
D. Danila ◽  
B. Montgomery ◽  
R. Szmulewitz ◽  
U. Vaishampayan ◽  
...  

2011 ◽  
Vol 80 (4) ◽  
pp. 1189-1197 ◽  
Author(s):  
Luigi Moretti ◽  
Kenneth Niermann ◽  
Stephen Schleicher ◽  
Nicholas J. Giacalone ◽  
Vinod Varki ◽  
...  

Cancers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 660 ◽  
Author(s):  
Kumar Nikhil ◽  
Asif Raza ◽  
Hanan S. Haymour ◽  
Benjamin V. Flueckiger ◽  
Jiachong Chu ◽  
...  

Multifunctional protein YBX1 upregulation promotes castration-resistant prostate cancer (CRPC). However, YBX1 protein abundance, but not its DNA status or mRNA levels, predicts CRPC recurrence, although the mechanism remains unknown. Similarly, the mechanism by which YBX1 regulates androgen receptor (AR) signaling remains unclear. We uncovered the first molecular mechanism of YBX1 upregulation at a post-translational level. YBX1 was identified as an Aurora Kinase-A (AURKA) substrate using a chemical screen. AURKA phosphorylates YBX1 at two key residues, which stabilizes it and promotes its nuclear translocation. YBX1 reciprocates and stabilizes AURKA, thereby initiating a synergistic loop. Notably, phospho-resistant YBX1 is dominant-negative and fully inhibits epithelial to mesenchymal transition, chemoresistance, drug-resistance and tumorigenesis in vivo. Unexpectedly, we further observed that YBX1 upregulates AR post-translationally by preventing its ubiquitylation, but not by increasing its transcription as reported before. Uncovering YBX1-mediated AR stabilization is highly significant due to AR’s critical role in both androgen-sensitive prostate cancer and CRPC. As YBX1 inhibitors are unknown, AURKA inhibitors provide a potent tool to degrade both YBX1 and AR simultaneously. Finally, this is the first study to show a reciprocal loop between YBX1 and its kinase, indicating that their concomitant inhibition will be act synergistically for CRPC therapy.


2017 ◽  
Vol 35 (15_suppl) ◽  
pp. e16508-e16508
Author(s):  
Angela Gernone ◽  
Senia Trabucco ◽  
Eliano Cascardi ◽  
Leonardo Resta ◽  
Franco Silvestris ◽  
...  

e16508 Background: Neuroendocrine differentiation (NED) in prostate cancer (PC) can be detected by immunohistochemistry as single cells in conventional adenocarcinoma. NEPC is a poor-recognized late presentation of hormone refractory subtype of PC AR-negative. NEPC correlates with poor prognosis, tumor progression during androgen-deprivation therapy and frequent visceral metastases. Aurora kinase A (AURKA) and Interleukin-6 (IL-6) cooperate to induce NED. The aim of this study was to correlate the expression of somatostatin receptor (SSTR) 1- 2- 3- 4- 5 subtypes, AURKA and IL-6 in primary PC with NED pattern before androgen ablation and OS. Methods: PC tissues were reviewed from 60 pts who had undergone biopsy or radical prostatectomy for previously untreated advanced or metastatic PC from 2010 to 2016. 10 samples expressed histologically chromogranin A (CgA), a marker of NED expression. Median age was 67 years (47-80), Gleason score ≥ 7, median PSA was 60 ng/ml (1.3-1000), ECOG 0/1 and bone-visceral sites measurable in 90% of cases. For comparison purposes, 8 pathology specimens from pts with primary PC negative for CgA expression were used. Results: SSTR1-2-4-5 were detected only in the nucleus of PC cells in 10/10 samples. AR was expressed in all 10 samples CgA positive. SSTR3 and AURKA were not expressed in all 10 samples. IL-6 was detected in 9/10 samples. All 10 pts developed early onset of CRPC, more aggressive clinical course with rapid occurrence of visceral metastases and OS was < 12 mos. Conclusions: In metastatic prostate cancer, pretreatment NED pattern can be a predictor for progression and survival after hormonal and during standard chemotherapy. Most likely NEPC become AR negative during disease progression and in response to androgen deprivation therapy. We supposed, according to other data, that the novel potent AR-targeted drugs should be not used in this subset of patients. SSTRs and somatostatin analogs are not potential targets for prostate cancer.


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