Clo­vis' Rubra­ca wins prostate can­cer ap­proval, but da­ta from ri­val Lyn­parza damp­en com­mer­cial ex­pec­ta­tions

While As­traZeneca and Mer­ck’s mar­ket-lead­ing Lyn­parza seem­ing­ly pipped Clo­vis On­col­o­gy’s ri­val Rubra­ca in help­ing prostate can­cer pa­tients, Rubra­ca has, as ex­pect­ed, made it across the fin­ish line first.

On Fri­day, the FDA ap­proved Rubra­ca in pa­tients with BR­CA mu­ta­tion-as­so­ci­at­ed metasta­t­ic cas­tra­tion-re­sis­tant prostate can­cer (mCR­PC) who have been treat­ed pre­vi­ous­ly with an­dro­gen re­cep­tor-di­rect­ed ther­a­py as well as chemother­a­py. The ap­proval marks the first ever for a PARP in­hibitor in the prostate can­cer set­ting.

The ap­proval was based on a sin­gle-arm TRI­TON2 study, with a 44% con­firmed ob­jec­tive re­sponse rate in 62 sec­ond-line pa­tients. A late-stage study eval­u­at­ing the im­pact of Rubra­ca on over­all sur­vival in prostate can­cer pa­tients is on­go­ing.

“While Clo­vis has an on­go­ing ran­dom­ized tri­al with OS as a key sec­ondary end­point, TRI­TON3, we would not ex­pect this ben­e­fit to be demon­strat­ed in time to have a sig­nif­i­cant com­mer­cial im­pact, as Lyn­parza may have al­ready ad­vanced to the front­line, based on the Phase 3 PRO­pel tri­al with ini­tial da­ta ex­pect­ed in 2021,” SVB Leerink an­a­lyst An­drew Berens wrote in a note in late April.

In April, Lyn­parza eclipsed the an­ti-an­dro­gen ther­a­pies Pfiz­er and Astel­las’ Xtan­di and John­son & John­son’s Zyti­ga by help­ing men with metasta­t­ic, cas­tra­tion-re­sis­tant prostate can­cer with BR­CA or ATM gene mu­ta­tions live longer. Pre­vi­ous­ly un­veiled da­ta al­so showed the PARP in­hibitor su­per­seded the im­pact of the an­dro­gen ther­a­pies at re­duc­ing the risk of dis­ease pro­gres­sion or death — by a sharp 66%.

An­drew Berens

“While Rubra­ca re­quires pri­or treat­ment with both an an­dro­gen-re­cep­tor and tax­ane ther­a­py, Lyn­parza’s reg­is­tra­tional PRO­found study on­ly re­quires pri­or treat­ment with an an­dro­gen-re­cep­tor treat­ment…as such, while Rubra­ca is ap­proved as a 3L ther­a­py, Lyn­parza could ob­tain ap­proval as a 2L + agent,” Berens wrote in a note on Mon­day. “Fur­ther­more, AZN’s PRO­pel study, which would ex­pand the Lyn­parza la­bel in­to 1L mCR­PC treat­ment in com­bi­na­tion with abi­raterone, is ex­pect­ed to an­nounce da­ta in 2021, po­ten­tial­ly mov­ing Lyn­parza to the front­line. In com­par­i­son, CLVS’ TRI­TON3 study in­ves­ti­gat­ing Rubra­ca ver­sus physi­cian’s choice of an­dro­gen-re­cep­tor or chemother­a­py in 1L mCR­PC will not read out da­ta un­til 2022.”

Berens has ad­just­ed his peak Rubra­ca prostate rev­enue to $130 mil­lion glob­al­ly.

Akin to Lyn­parza, Clo­vis’ Rubra­ca and GSK’s Ze­ju­la are poly (ADP-ri­bose) poly­merase (PARP) in­hibitors. PARP is a pro­tein used by dam­aged cells to ini­ti­ate re­pair, and by thwart­ing it, the class of drugs is en­gi­neered to pre­vent can­cer cells from re­pair­ing them­selves, there­by cat­alyz­ing their de­struc­tion.

While drug de­vel­op­ers have pri­mar­i­ly re­lied on BR­CA mu­ta­tions to iden­ti­fy pa­tients who can ben­e­fit from this fam­i­ly of ther­a­pies, sci­en­tists have sug­gest­ed that de­fects in oth­er genes in­volved in DNA re­pair — which ren­der cells can­cer­ous — could be prime tar­gets too.

Tar­get­ing a Po­ten­tial Vul­ner­a­bil­i­ty of Cer­tain Can­cers with DNA Dam­age Re­sponse

Every individual’s DNA is unique, and because of this, every patient responds differently to disease and treatment. It is astonishing how four tiny building blocks of our DNA – A, T, C, G – dictate our health, disease, and how we age.

The tricky thing about DNA is that it is constantly exposed to damage by sources such as ultraviolet light, certain chemicals, toxins, and even natural biochemical processes inside our cells.¹ If ignored, DNA damage will accumulate in replicating cells, giving rise to mutations that can lead to premature aging, cancer, and other diseases.

Roivant par­lays a $450M chunk of eq­ui­ty in biotech buy­out, grab­bing a com­pu­ta­tion­al group to dri­ve dis­cov­ery work

New Roivant CEO Matt Gline has crafted an all-equity upfront deal to buy out a Boston-based biotech that has been toiling for several years now at building a supercomputing-based computational platform to design new drugs. And he’s adding it to the Erector set of science operations that are being built up to support their network of biotech subsidiaries with an eye to growing the pipeline in a play to create a new kind of pharma company.

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The fu­ture of mR­NA, J&J's vac­cine ad­comm, Mer­ck­'s $1.85B au­toim­mune bet and more

Welcome to the third installment of Endpoints Weekly, your review of the week’s top biopharma headlines. Want this in your inbox every Saturday morning? Current Endpoints readers can visit their reader profile to add Endpoints Weekly. New to Endpoints? Sign up here.

If this report was helpful in recapping it all for you, please do share it with your colleagues.

Get ready for FDA’s third Covid-19 vaccine

On the heels of a ringing endorsement from FDA reviewers earlier in the week, J&J‘s single-dose vaccine — which proved 66% effective at preventing symptomatic Covid-19, and 85% effective at stopping severe disease 28 days after administration — the advisory committee convened by the agency voted unanimously to recommend its emergency use authorization. It was “a relatively easy call,” according to one of the committee members — although that doesn’t mean they didn’t have questions. Jason Mast has the highlights from the discussion, including new information from the company, on this live blog.

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Doug Ingram (file photo)

Why not? Sarep­ta’s third Duchenne MD drug sails to ac­cel­er­at­ed ap­proval

Sarepta may be running into some trouble with its next-gen gene therapy approach to Duchenne muscular dystrophy. But when it comes to antisense oligonucleotides, the well-trodden regulatory path is still leading straight to an accelerated approval for casimersen, now christened Amondys 45.

We just have to wait until 2024 to find out if it works.

Amondys 45’s approval was unceremonious, compared to its two older siblings. There was no controversy within the FDA over approving a drug based on a biomarker rather than clinical benefit, setting up a powerful precedent that still haunts acting FDA commissioner Janet Woodcock as biotech insiders weighed her potential permanent appointment; no drama like the FDA issuing a stunning rejection only to reverse its decision and hand out an OK four months later, which got more complicated after the scathing complete response letter was published; no anxious tea leaf reading or heated arguments from drug developers and patient advocates who were tired of having corticosteroids as their loved ones’ only (sometimes expensive) option.

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Fol­low biotechs go­ing pub­lic with the End­points News IPO Track­er

The Endpoints News team is continuing to track IPO filings for 2021, and we’ve designed a new tracker page for the effort.

Check it out here: Biopharma IPOs 2021 from Endpoints News

You’ll be able to find all the biotechs that have filed and priced so far this year, sortable by quarter and listed by newest first. As of the time of publishing on Feb. 25, there have already been 16 biotechs debuting on Nasdaq so far this year, with an additional four having filed their S-1 paperwork.

Steve Cutler, Icon CEO (Icon)

In the biggest CRO takeover in years, Icon doles out $12B for PRA Health Sci­ences to fo­cus on de­cen­tral­ized clin­i­cal work

Contract research M&A had a healthy run in recent years before recently petering out. But with the market ripe for a big buyout and the Covid-19 pandemic emphasizing the importance of decentralized trials, Wednesday saw a tectonic shift in the CRO world.

Icon, the Dublin-based CRO, will acquire PRA Health Sciences for $12 billion in a move that will shake up the highest rungs of a fragmented market. The merger would combine the 5th- and 6th-largest CROs by 2020 revenue, according to Icon, and the merger will set the newco up to be the second-largest global CRO behind only IQVIA.

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Roche and Genen­tech re­searchers plot $53M dis­cov­ery quest aimed at spark­ing a 'Holy moly' piv­ot in neu­ro R&D

Roche and Genentech have committed $53 million to back a 10-year quest aimed at going back to the drawing board to use new technology and fresh scientific insights to generate a pipeline of drugs for neurological diseases.

Researchers from both Roche and its big South San Francisco hub — mixing teams from gRED and pRED this time — will mix it up with the scientists drawn together for the Weill Neurohub — formed in 2019 as a joint research partnership involving UCSF, Berkeley and the University of Washington — in an exploration of the field to develop new therapies for some of the toughest diseases in drug R&D: Alzheimer’s, Parkinson’s, Huntington’s, ALS and autism.

Am­gen, As­traZeneca speed to­ward fil­ing next-gen an­ti­body for asth­ma af­ter un­cork­ing full late-stage da­ta

On the hunt for a novel competitor to Sanofi and Regeneron’s Dupixent in severe asthma, Amgen and AstraZeneca posted “exciting” results from their next-gen antibody late last year. Now, the partners are showing their hands, and the results look good enough for approval.

Amgen and AstraZeneca’s tezepelumab plus standard of care cut the rate of severe asthma attacks by 56% at the one-year mark compared with SOC alone, according to full data from the Phase III NAVIGATOR study presented Friday at the virtual American Academy of Allergy, Asthma & Immunology meeting. And those significant results were consistent regardless of patients’ baseline eosinophil counts.

With dust set­tled on ac­tivist at­tack, Lau­rence Coop­er leaves Zio­pharm to a new board

Laurence Cooper has done his part.

In the five years since he left a tenured position at Houston’s MD Anderson Cancer Center to become CEO of Boston-based Ziopharm, he’s steered the small-cap immunotherapy player through patient deaths in trials, clinical holds, short attacks and, most recently, an activist attack on the board.

So when the company has “fantastic news” like an IND clearance for a TCR T cell therapy program, he’s ready to pass on the baton.

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