Roger M. Perlmutter - Executive Vice President, Research and Development
Analyst · the Lehman Brothers
Thank you, George. Slide 24 provides an overview of the topics that I will cover this afternoon. First we are in the midst of productive discussions with the FDA with respect to ESA labeling. We and the agency share the goal of ensuring that ESAs are used appropriately and wish to make certain that both physicians and patients are well informed about the risks and benefits of ESA therapy, especially in the chemotherapy-induced anemia setting. Along these lines, in Europe, we expect that the EMEA will ratify new labeling language for the ESA-class by the end of this year. We have also interacted productively with the FDA with respect to the use of ENBREL in the setting of moderate-to-severe psoriasis in pediatric patients. The agency has requested additional information about our risk evaluation and mitigation strategy, so called REMS for ENBREL and pediatric psoriasis, which we expect to be able to provide to them in the very near future. As has been discussed in many trade publications, the establishment of REMS programs is becoming increasingly important in our interactions with the FDA. Along the same lines, we are continuing to work with FDA to assist them in the completion of the review of romiplostim or Nplate for the treatment of immune thrombocytopenic purpura. Here too, the assessment of our risk evolution and mitigation strategy has been a special focus of our interaction with the agency and I am optimistic we have reached good alignment. From the development perspective, we have made substantial strides in our Therapeutic Oncology program, many of which we reviewed at the American Society for Clinical Oncology Meeting in June. At that meeting, the importance of the KRAS biomarker as a means of identifying patients who could benefit from Vectibix's treatment was again highlighted. Also in June, we presented data from our Phase 2 step study, in which we evaluated for the first time, the use of pre-emptive treatments to mitigate the skin toxicity associated with potent blockers of EGF receptor signaling. In this study, pre-emptive treatments with a combination of skin moisturizers, sunscreen, topical steroids and oral doxycycline reduced the incidence of grade 2 or greater skin toxicities by more than 50%. We are adjusting our therapeutic programs to make better use of this pre-treatment regimen going forward. During the second quarter, we also completed several important studies in the Denosumab program, as shown on slide 25. As you know, we have pursued a broad set of clinical trials designed to demonstrate the efficacy of Denosumab in blocking bone resorption in different clinical settings. Slide 25 shows that we've have completed the enrollment of virtually all of our first wave of clinical studies for denosumab. Same for the enrollment of the study designed to explore the effect of denosumab on skeletal pathology in patients with prostate cancer that has metastasis to bone. And a related study, designed to test for the denosumab can prevent the appearance of bone metastasis in patients with prostate cancer who are at high risk for such events completed the enrollment during the second quarter, and hence is boxed in red, on slide 25. During the past two weeks, we announced the results of two pivotal studies designed to test whether denosumab reduces the risk of fracture and patients made more susceptible as a result of excess bone resumption. Slide 26 highlights the results of our pivotal phase 3 study in women with post-menopausal osteoporosis. The study was a large international trial that compared the efficacy and safety of denosumab administered subcutaneously 176 months with that observed using for in situ injections. In all, nearly 8,000 women participated in this study. As noted on the slide, denosumab treatment resulted in a statistically significant reduction in the incidence of new vertebral fractures as compared with placebo treatment. Moreover non-vertebral fractures and more specifically hip fractures were also reduced in frequency and these reductions were statistically significant. This study was so large and occupied fully three years of treatment. We have the opportunity to review a really comprehensive statement dataset. It was extremely gratifying to see that adverse events in general and serious adverse events in particular were well balanced between the denosumab and placebo groups. Since our announcement of these results last Friday, I have received many questions regarding the relative efficacy of the denosumab as compared to existing anti-resorption agents, especially the placebo. To provide a context for this discussion, let me be clear that it is inappropriate to compare results across study. And we thank here the conclusion from Catherine MacLean's systematic review that was published recently in the Annals of Internal Medicine. She said although good evidence suggests that many agents are effective in preventing osteoporotic fractures, the data are insufficient to determine the relative efficacy or safety of these agents. Clearly, without head-to-head studies, it is impossible to compare to denosumab with other treatments, which themselves cannot be compared with one another. This said, we have previously reported the results of our head-to-head study of twice yearly denosumab treatment as compared with weekly treatment with alendronate at the labeled dose. Here we show that denosumab was superior to alendronate with respect to its ability to increase bone marrow density. Indeed, denosumab is the most potent anti-resorptive agent that has ever been introduced into clinical practice. What was unclear previously was one of these increases in bone marrow density, which are associated with improved bone strength in pre-clinical studies would translate into reductions in osteo-porotic fractures in people. We now know the answer. I have to say that I am extremely excited about the results of this study, which frankly exceeded my expectations. The complete dataset will be presented in about six weeks at the Annul Meeting of American Society for Bone and Mineral Research, which will give a broad group for experienced and bone experts, the opportunity to placed these results in an appropriate clinical on scientific context. During this month, we also announced the results of the 138 study in men undergoing androgen-depravation treatment for prostate cancer. You can think of this is a companion study for the post-menopausal osteoporosis study, in this case in men with hormone depletion. Here too, as noted on slide 27, denosumab therapy, in addition to increasing bone marrow density was associated with a statistically significant reduction in the incidence vertebral fractures. In every case, we have found that the effects of denosumab are rapid and sustained. For example, as noted on slide 27, a review of the long-term extension of our Phase 2 study, demonstrated sustained increases in bone mineral density over a five-year treatment interval, and a pilot Phase 2 study shows that denosumab stimulates increases in cortical fitness radius and tibia, as compared to either placebo or alendronate treatment. We do expect additional results from important clinical studies in 2008 as shown on slide 28, including our Phase 2 study of AMG 317, our antibody which blocks the activity of both interleukin 4 and interleukin 13 in the treatment of asthma. Looking forward still further, we will examine the efficacy of a number of new approaches to cancer therapy in 2009, including of course the ability of denosumab to improve outcomes in patients with metastatic bone disease. I'll look forward to updating this chart at our Business Meeting Review later this year. Kevin?