PARP inhibitor has positive outcomes in Phase III trial in selected men with mCRPC

According to a media release issued jointly yesterday by AstraZeneca and Merck, treatment with the PARP inhibitor olaparib (Lynparza) has demonstrated “positive results from the Phase III PROfound trial … in [a subset of] men with metastatic castration-resistant prostate cancer (mCRPC).”

Two Phase III trials of PARP inhibitors in mCRPC

There are now two, ongoing, Phase III trials of PARP inhibitors in the treatment of eligible patients with metastatic, castration-resistant prostate cancer (mCRPC).

Second PARP inhibitor approved by FDA (but still not for prostate cancer)

A second PARP inhibitor has recently been approved by the US Food and Drug Administration (FDA) for the treatment of patients with BRCA1/2 mutations and advanced ovarian cancer who have already received two types of chemotherapy.

PARP inhibition, TMPRSS2-EPG gene fusion, and veliparib in mCRPC

A Phase II clinical trial being coordinated by researchers at the University of Michigan Cancer Center is (as far as we know) the first trial ever to explore the potential of treatment for men with metastatic, castration-resistant prostate cancer (mCRPC) who carry the TMPRSS2-EPG fusion gene (as opposed to those who do not).

All pumped up about PARPs

A report in this week’s issue of the New England Journal of Medicine (which is never shy about promoting itself) provides more early, and interesting, evidence of the future potential of so-called PARP inhibitors in cancer therapy.

Ductal adenocarcimoma of the prostate is “rare” but aggressive

Pure ductal adenocarcinoma of the prostate (dPC) is thought to be found in just 0.4 to 0.8 percent of men who get diagnosed with prostate cancer each year.

Phase III trial of olaparib in first-line treatment of mCRPC

Unfortunately we don’t always hear about some interesting clinical trials as early as we would like to. The following is a case in point.

Talazoparib + enzalutamide in treatment of mCRPC

Back in December 2017, Pfizer started a trial to explore whether the PARP inhibitor talazoparib (Talzenna) could be used in combination with enzalutamide (Xtandi) to effectively treat men with what are known as MSI-H or dMMR subtypes of metastatic castration-resistant prostate cancer (mCRPC).

Germline BRCA2 mutations and management of mCRPC

A newly published paper in the Journal of Clinical Oncology has confirmed — based on a prospective study (as opposed to retrospective data) — that there is a strong risk association between a germline mutation of the BRCA2 gene and risk for metastatic castration-resistant prostate cancer (mCRPC).

A paradigm for the future?

Not so long ago, one of the new immunotherapeutic agents (a PD-1 inhibitor called pembrolizumab or Keytruda) was approved by the US Food and Drug Administration (FDA) for the treatment of so-called microsatellite instability-high (MSI-H) or mismatch repair-deficient (dMMR) solid tumors — regardless of the biological site of origin of those tumors.

Preliminary data from the TRITON 2 trial of rucaparib in mCRPC

A poster presented at the ESMO meeting in Munich has just reported data from an unplanned, preliminary analysis of data from the first 85 patients (out of a scheduled total of 150 patients) enrolled in the TRITON 2 trial of the PARP inhibitor rucaparib (Rubraca)

Advances in the identification of patients who may respond well to particular types of immunotherapy

A newly published paper by an international group of investigators has given us some further insight in to the roles of immunotherapeutic agents in the treatment of at least a subset of men with advanced forms of prostate cancer.

Speed of change in the management of prostate cancer

One of our regular correspondents (who lives in England) was recently told something rather interesting by the Consultant Urologist he sees in the UK.

How many men are really benefiting from genome-targeted prostate cancer treatment?

The answer to that question, at present, is that we don’t know — but it’s probably very few indeed compared to all the men who have progressive forms of prostate cancer.

Medicare to cover genetic/genomic testing in advanced cancers

In an important decision announced late on Friday last week, the Centers for Medicare & Medicaid Services (CMS) announced that it had agreed to cover costs associated with genetic/genomic testing for Medicare patients with many advanced forms of cancer.