Steven Stein
Analyst · SVB Leerink. Your line is now live
I'll start on the LIMBER program, Andy, and then hand it to Barry for your second question. So remember, firstly, it's important to us, LIMBER, I mean, Barry has spoken about RUX, it's enormous benefit to patients, the value it brings to patients, and then to the company and shareholders as well. So this is an internal effort that's cross functional, and appropriately large, directed at many different areas. So you have the once-daily program we just spoke about, and its importance there for once-daily alone, plus optionality potentially on fixed dose combinations with other once-daily down the line, should we decide to do that. Then the second pillar, it's all the combination work and you asked, more specifically, what we may be more excited about versus others, and I'll come back to that in a second. But just to mention, the third pillar of the program, which we more quiet about because it's preclinical, in terms of discovery research work in both MF and P vera, where there are other potential targets, which we may end up pursuing, and Dash in his research endeavors are looking at those plus with various collaborators. Just to come back to that middle tier and the combos, so the RUX parsa program, both registration directed Phase 3s are open. Sites are already been initiated and are screening patients. Just to remind you, there's a sub-optimal setting, where patients have had at least 3 months of ruxolitinib, 8 weeks of stable dose, but are not having sufficient benefit in terms of spleen reduction of symptoms, and are then randomized to continue RUX versus RUX plus parsaclisib in that setting, and that study is open. And then the first-line study of RUX plus parsa versus RUX alone in first-line looking typically at a 24-week spleen volume response of 35% or greater. We also then internally have our BET program, which this half of the year is looking at monotherapy safety, and then we want to initiate combinations with RUX in the second half of this year. Just also to remind you there's not a new drug test, we had it in the clinic a few years ago, we were dosing at multiples of where we were now looking largely at solid tumors and MIC inhibition. So we already have an experience with this compound of 100-plus patients or more in that setting, and we want to keep accelerating that. And then, as I said in my prepared remarks, the third program is the ALK2 program, very little bit of a different mindset, probably works as we illustrated through hepcidin inhibition and ameliorating the anemia, which has a 2-fold effect. It will ameliorate potentially the anemia of myelofibrosis itself plus the ruxolitinib induced anemia. And then not only that should that be successful, that's one of the principal reasons patients discontinue ruxolitinib. So we can ameliorate that you'll get the added benefit of continued RUX use and efficacy thereof. So that's also an exciting program. So I'm not giving you a priority list, because they all have slightly different nuances. The 1 most ahead is obviously parsaclisib in terms of registration studies underway. The other 2 we want to complete the monotherapy and combination safety this year and present data to you next year. I'll hand it to Barry for your second question.