Nav: Home

Protein that hinders advancement of prostate cancer identified

May 20, 2019

(Boston)--Researchers at Boston University School of Medicine (BUSM) have discovered that blocking a specific protein, may be a promising strategy to prevent the spread of castration-resistant prostate cancer (CRPC).

Under the direction of BUSM's Gerald V. Denis PhD, researchers have long studied a family of three closely related proteins, called BET bromodomain proteins, composed of BRD2, BRD3 and BRD4, which regulate gene expression. BUSM researchers were the first (in the 1990s) to show how these proteins function in human cancer.

These researchers now have discovered that inhibition of the protein BRD4, but not BRD2 or BRD3, consistently regulated prostate cancer cell migration and invasion.

CRPC is a highly aggressive form of prostate cancer that often leads to the development of lethal metastases. Standard of care treatment for patients with CRPC typically includes a means to disrupt androgen receptor (AR) signaling, and while effective for an average of two-three years, treatment inevitably fails to impede progression due to acquired resistance mechanisms to the AR.

"Our findings are significant because current therapeutic options for CRPC are limited and focus primarily on suppressing prostate tumor cells that rely on AR signaling," explained first author Jordan Shafran, a PhD candidate in the department of molecular and translational medicine at BUSM.

CRPC is a complex, heterogenous disease, with varying AR states and expression patterns across individual tumor cells. As the disease progresses, prostate tumor cells can become less reliant on AR signaling and use alternative signaling mechanisms to sustain growth and dissemination. "Therefore, it is imperative to identify 'druggable' targets that regulate prostate cancer cell migration and invasion in cells that are either reliant on, or independent of, androgen receptor signaling," he added.
-end-
These findings appear online in the journal Molecular Cancer Research.

This study was supported by grants from the National Institutes of Health (DK090455, U01CA182898, R01CA222170; GV Denis; T32AI007309; TB Kepler).

Boston University School of Medicine

Related Prostate Cancer Articles:

The Lancet: Prostate cancer study finds molecular imaging could transform management of patients with aggressive cancer
Results from a randomised controlled trial involving 300 prostate cancer patients find that a molecular imaging technique is more accurate than conventional medical imaging and recommends the scans be introduced into routine clinical practice.
Common genetic defect in prostate cancer inspires path to new anti-cancer drugs
Researchers found that, in prostate cancer, a mutation leading to the loss of one allele of a tumor suppressor gene known as PPP2R2A is enough to worsen a tumor caused by other mutations.
First prostate cancer therapy to target genes delays cancer progression
For the first time, prostate cancer has been treated based on the genetic makeup of the cancer, resulting in delayed disease progression, delayed time to pain progression, and potentially extending lives in patients with advanced, metastatic prostate cancer, reports a large phase 3 trial.
Men taking medications for enlarged prostate face delays in prostate cancer diagnosis
University of California San Diego School of Medicine researchers report that men treated with medications for benign prostatic hyperplasia (enlarged prostate) experienced a two-year delay in diagnosis of their prostate cancer and were twice as likely to have advanced disease upon diagnosis.
CNIO researchers confirm links between aggressive prostate cancer and hereditary breast cancer
The study has potential implications for families with members suffering from these types of tumours who are at an increased risk of developing cancer.
Distinguishing fatal prostate cancer from 'manageable' cancer now possible
Scientists at the University of York have found a way of distinguishing between fatal prostate cancer and manageable cancer, which could reduce unnecessary surgeries and radiotherapy.
Researchers find prostate cancer drug byproduct can fuel cancer cells
A genetic anomaly in certain men with prostate cancer may impact their response to common drugs used to treat the disease, according to new research at Cleveland Clinic.
ASCO and Cancer Care Ontario update guideline on radiation therapy for prostate cancer
The American Society of Clinical Oncology (ASCO) and Cancer Care Ontario today issued a joint clinical practice guideline update on brachytherapy (internal radiation) for patients with prostate cancer.
Patient prostate tissue used to create unique model of prostate cancer biology
For the first time, researchers have been able to grow, in a lab, both normal and primary cancerous prostate cells from a patient, and then implant a million of the cancer cells into a mouse to track how the tumor progresses.
Moffitt Cancer Center awarded $3.2 million grant to study bone metastasis in prostate cancer
Moffitt researchers David Basanta, Ph.D., and Conor Lynch, Ph.D., have been awarded a U01 grant to investigate prostate cancer metastasis.
More Prostate Cancer News and Prostate Cancer Current Events

Trending Science News

Current Coronavirus (COVID-19) News

Top Science Podcasts

We have hand picked the top science podcasts of 2020.
Now Playing: TED Radio Hour

Teaching For Better Humans 2.0
More than test scores or good grades–what do kids need for the future? This hour, TED speakers explore how to help children grow into better humans, both during and after this time of crisis. Guests include educators Richard Culatta and Liz Kleinrock, psychologist Thomas Curran, and writer Jacqueline Woodson.
Now Playing: Science for the People

#556 The Power of Friendship
It's 2020 and times are tough. Maybe some of us are learning about social distancing the hard way. Maybe we just are all a little anxious. No matter what, we could probably use a friend. But what is a friend, exactly? And why do we need them so much? This week host Bethany Brookshire speaks with Lydia Denworth, author of the new book "Friendship: The Evolution, Biology, and Extraordinary Power of Life's Fundamental Bond". This episode is hosted by Bethany Brookshire, science writer from Science News.
Now Playing: Radiolab

Space
One of the most consistent questions we get at the show is from parents who want to know which episodes are kid-friendly and which aren't. So today, we're releasing a separate feed, Radiolab for Kids. To kick it off, we're rerunning an all-time favorite episode: Space. In the 60's, space exploration was an American obsession. This hour, we chart the path from romance to increasing cynicism. We begin with Ann Druyan, widow of Carl Sagan, with a story about the Voyager expedition, true love, and a golden record that travels through space. And astrophysicist Neil de Grasse Tyson explains the Coepernican Principle, and just how insignificant we are. Support Radiolab today at Radiolab.org/donate.