scholarly journals miRNA-21 Serum Evaluation in BPH, Hormone Sensitive Prostate Cancer, and Castrate Resistant Prostate Cancer: Attempt for Diagnostic Biomarker Evaluation

2021 ◽  
Vol 29 (4) ◽  
pp. 266
Author(s):  
Kurnia Seputra ◽  
Basuki Purnomo ◽  
Hani Susianti ◽  
Handono Kalim ◽  
Athaya Purnomo
Keyword(s):  
Prostate Cancer ◽  
Diagnostic Biomarker ◽  
Castrate Resistant Prostate Cancer ◽  
Hormone Sensitive ◽  
Castrate Resistant ◽  
Biomarker Evaluation

Why Chemotherapy Should be Given Early for Men with Metastatic Prostate Cancer

2015 ◽  
pp. e263-e269 ◽  
Author(s):  
Leonel F. Hernandez-Aya ◽  
Maha Hussain
Keyword(s):  
Prostate Cancer ◽  
De Novo ◽  
High Volume ◽  
High Response Rate ◽  
Phase Iii ◽  
Incurable Disease ◽  
Castration Resistant ◽  
Castrate Resistant Prostate Cancer ◽  
Hormone Sensitive ◽  
Castrate Resistant

Metastatic hormone-sensitive prostate cancer (mHSPC) is an incurable disease, and despite a high response rate to androgen-deprivation therapy (ADT), outcomes have not significantly changed for many decades. Earlier attempts at multitargeted strategies with the addition of cytotoxic chemotherapy to ADT did not affect survival. As more effective therapies are emerging, including cytotoxic therapy for patients with metastatic castrate-resistant prostate cancer (mCRPC), there is increasing interest for testing these drugs earlier in the disease course. The premise is that agents with clinical benefit in advanced mCRPC may have a better effect if used preemptively before the development of significant resistance and to attack earlier de novo androgen resistant/independent clones. The recent results of the phase III clinical trial E3805 investigating ADT with or without docetaxel in mHSPC provide compelling support for this strategy. Docetaxel combined with ADT significantly improved overall survival from 44 to 57.6 months (p = 0.0003), particularly in patients with high-volume disease (from 32.2 to 49.2 months; p = 0.0006). Longer follow-up is needed to assess the effect on patients with low disease burden. Further studies are needed to further maximize the antitumor effect in patients with mHSPC and to investigate the effects of advancing therapy to this disease setting on the efficacy of respective agents in the castration-resistant setting.

A personalized medicine approach to identifying dysregulated epigenetic enzymes in the development of castrate-resistant prostate cancer.

2017 ◽  
Vol 35 (6_suppl) ◽  
pp. 237-237
Author(s):  
David Frazier Jarrard ◽  
Jin-Hee Lee ◽  
Melissa Boersma ◽  
Bing Yang ◽  
Nathan Alan Damaschke ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Human Tumor ◽  
Cancer Epigenetics ◽  
Protein Levels ◽  
Histone Lysine ◽  
Novel Approach ◽  
Histone Modifiers ◽  
Castrate Resistant Prostate Cancer ◽  
Hormone Sensitive ◽  
Castrate Resistant

237 Background: Recent advances in proteomic and chromatin immunoprecipitation tools have been crucial in studying cancer epigenetics but the ability to measure directly the enzyme activities of dysregulated histone-modifiers is lacking. We utilize a novel approach to identify altered histone-modifying enzymes in the progression from hormone sensitive (HS) to castrate-resistant prostate cancer (CRPC) progression. Methods: We developed, validated and utilized a high-throughput peptide microarray assay to identify altered histone lysine (de)acetylation activity in tumor lysates. Functional assays, novel HS and CRPC human tumor arrays and xenografts were utilized to confirm these findings. Results: This microarray-based activity assay revealed up-regulated histone acetyltransferase (HAT) activity against specific histone H3 sites in a castrate-resistant CR cell line compared to its hormone-sensitive (HS) isogenic counterpart. NAD+-dependent deacetylation assays revealed down-regulated Sirtuin activity in validated CR lines. Levels of acetyltransferases GCN5, PCAF, CBP and p300 were unchanged between matched HS and CR cell lines. However, auto-acetylation of p300 at K1499, a modification known to enhance HAT activity and a target of deacetylation by SIRT2, was highly elevated in CR cells. Among all 7 Sirtuins, only SIRT2 and SIRT3 protein levels were reduced in CR lines. Interrogation of HS and matched CR xenograft lines reveals that H3K18 hyperacetylation, increased p300 activity, and decreased SIRT2 expression are associated with progression to CR in 8/12 (66%). Tissue microarray analysis revealed that hyperacetylation of H3K18 is a feature of CRPC. Inhibition of p300 results in lower H3K18ac levels and increased expression of androgen receptor. Conclusions: This novel microarray approach provides a method to identify commonly dysregulated chromatin enzymes during progression providing a personalized therapeutic strategy to direct available drugs to target enzymes. Reduced SIRT2 expression and increased p300 activity lead to a concerted mechanism of hyperacetylation at specific histone lysine sites (H3K9, H3K14, and H3K18)

Veterans affairs (VA) prostate cancer treatment (Tx) sequencing (VAPCaTS): A real-world study.

2020 ◽  
Vol 38 (6_suppl) ◽  
pp. 54-54
Author(s):  
Stephen J. Freedland ◽  
Amanda M. De Hoedt ◽  
Maral DerSarkissian ◽  
Rose Chang ◽  
Ambika Satija ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Real World ◽  
Risk Scores ◽  
Real World Data ◽  
Prostate Cancer Treatment ◽  
Optimal Outcomes ◽  
Castrate Resistant Prostate Cancer ◽  
Hormone Sensitive ◽  
Castrate Resistant

54 Background: Limited real-world data are available on tx sequence for patients (pts) with metastatic hormone-sensitive PC (mHSPC) treated with androgen deprivation therapy (ADT) plus docetaxel (D) or abiraterone (A) who progress to metastatic castrate-resistant prostate cancer (mCRPC). Methods: VA electronic medical records were used to retrospectively analyze 240 men treated for mHSPC with ADT and D (n=208; selected to be overrepresented) from 07/2014-08/2018 or ADT and A (n=32) from 12/2016-09/2018 and receiving at least one tx after progressing to mCRPC. Results: For D and A cohorts respectively, median age at mHSPC diagnosis was 65.2 and 70.8 yrs; 62% and 77% were white; 98% and 100% had bone metastases (mets), 40% and 34% had lymph node mets, 21% and 16% had lung mets, and 20% and 6% had liver mets; median follow-up after ADT start was 2.2 and 1.4 yrs. Pts in D and A cohorts had 56% and 36% low, 33% and 45% intermediate, and 11% and 19% high Halabi risk scores at mCRPC, respectively. Among all pts, max mCRPC tx lines was 6; 106 (44%) had only one line, 71 (30%) had two lines, and 63 (26%) pts had ≥ three lines. Across all mCRPC tx lines, 71 (30%) received a taxane at some point (47 D, 40 cabazitaxel [C]). Txs for first and second line mCRPC are shown in the Table. For D pts who received androgen-receptor targeted agents (ARTA) as first mCRPC tx and received any second mCRPC tx, 70 (62%) were treated with back-to-back ARTA. For A pts, 25 (78%) received back-to-back ARTA as first mCRPC tx. Conclusions: Most pts received ARTA as first mCRPC tx, and a large proportion of pts were treated with back-to-back ARTA. Longer follow-up is needed to assess which sequences are associated with optimal outcomes.[Table: see text]

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