Thomas Neff
Analyst · RBC Capital Markets
Thank you, Greg. Good afternoon. On today's call, we will review key updates, discuss accomplishments and results during Q2, and highlight our most important near-term and long-term goals. Many of these on the call today may be new to FibroGen, so I'd like to begin with a brief introduction.
The company is advancing 4 distinct clinical stage programs in anemia, fibrosis, cancer and corneal implants. In anemia, we have our lead compound, roxadustat, a small molecule investigational therapy based on hypoxia inducible factor system, which has been shown to trigger the natural responses to anemia. Roxadustat is currently in Phase III trials in the U.S. and in Europe, and is now expected to interface 3 in China Q4 this year.
Roxadustat was discovered and developed by FibroGen and is partnered with AstraZeneca and Astellas under multiple exclusive territory-based agreements. Our roxadustat patent portfolio includes multiple issued and pending U.S. patents, offering protection for roxadustat through 2033 and potentially beyond.
As noted in today's press release, we remain on track to achieve our goal of submitting regulatory applications in China in 2016 and in the U.S. in 2018.
Working closely with AstraZeneca and Astellas, we have launched all 7 studies required for the roxadustat regulatory submissions in the U.S. and EU. 4 of these studies are in hemodialysis patients where total enrollment is planned for just over 3,500 patients, 3 of these studies are in non-dialysis with target enrollment of approximately 3,800 patients. Of these 7 studies, 3 are being run by FibroGen, 2 by Astellas and 2 by AstraZeneca.
The 3 FibroGen studies are focused in the U.S. and account for 25% of patient enrollment. The 2 Astellas studies are focused in Europe, the 2 AstraZeneca studies are global in character and much larger than the others, accounting for more than 1/2 of the entire program, with target enrollment of more than 4,000 of the 7,300 patients we need to complete Phase III enrollment.
For the 3 FibroGen roxadustat Phase III studies, we have now reached approximately 2/3 of our cumulative target enrollment. During the past 3 months, we have been rolling in the range of 125 to 150 patients per month in our 3 studies. The enrollment run rate give us added confidence that FibroGen can meet our enrollment goals.
As was agreed with our partner, AstraZeneca, at the beginning of this year, the base plan is for FibroGen to complete target enrollment by March to April 2016. The stretch goal for all of our studies and their studies is to achieve full enrollment by year-end 2015.
At present, we expect one of our studies to meet or beat the stretch goal. And for the other 2, we now think we can meet or beat the March, April targets. As we previously stated in our March call, we completed 2 separate 2-year carcinogenicity studies, for roxadustat, 1 in rats and 1 in mice. These studies showed no evidence of effect on carcinogenicity or mortality. And as we announced on May 7, the audited study reports triggered a $15 million payment from AstraZeneca for this milestone achievement.
In the roxadustat clinical trials, we have seen aspects of a clinical profile that are unique compared to previously approved anemia therapies. Roxadustat increases hemoglobin levels within or near physiologic level, using within or near physiologic level of endogenous epo regulates genes that make iron bioavailable. And in addition, evidence shows that roxadustat suppresses the iron regulatory hormone, hepcidin upregulates the iron transport factor transferrin. Hepcidin is upregulated into flammatory conditions and blocks access to iron and macrophages that is used to make red blood cells. Studies have shown that IV iron increases hepcidin levels, which may interfere with the activity of the approved anemia therapies. Transferrin is the main protein that binds to iron and transports it through the body.
Consistent with these unique actions in our Phase II studies, we saw that roxadustat's ability to correct anemia does not appear to be impaired by inflammation irrespective of the level of inflammation. The paradigm is thus very different than recombinant epo and IV iron, where the presence of inflammation requires increasingly high doses. The data suggests that roxadustat may be able to overcome inflammation to treat dialysis patients who are hyporesponsive to currently approved therapies, with erythropoiesis stimulating agents and IV iron as well as potentially to treat patients with inflammatory bowel disease, lupus nephritis, ulcerative colitis and other such categories where ESA products have not received a label.
We are continuing to evaluate the possibility of developing roxadustat for these and other additional indications. Based on these data and our differentiated mechanism of action and our discussions with our partner, AstraZeneca, including the view that the inflammatory anemias are considered unmet medical need. We modified our company disclosure during the second quarter of 2015 to indicate our assessment that for U.S. dialysis patients, it is now more likely than not that roxadustat will be separately reimbursed, rather than being in the dialysis drug capitation bundle as was contemplated at the time of our IPO.
The global scope of the roxadustat program includes an agreement with our partner, AstraZeneca, for the development -- commercialization of roxadustat in China. We have been informed that the required technical review of our Phase III clinical trial application by the Center for Drug Evaluation, otherwise known as the CDE, has been completed and the file has been referred back to the CFDA to obtain the official authorization to conduct the Phase III program.
We are in -- thus we are now at a stage in our China program where we are advised that the remaining regulatory approval steps to start the Phase III studies are procedural. Therefore, we now expect to begin opening study sites and enrolling patients in 2 Phase III studies in China in Q4 2015.
As those of you who were involved in our IPO may recall, we committed to publish 6 manuscripts period-to-period journals in the first half of 2015, all have now been submitted and the publications of the roxadustat Phase II studies are beginning to roll out. As we announced yesterday, the placebo-controlled dose rangefinding study in non-dialysis CKD patients, Study 017, has just been published in the current online edition of Nephrology Dialysis and Transplantation, or NDT, the Journal of the ERA-EDTA in Europe. We expect a second manuscript will be published by a major journal in the coming weeks, along with editorial comments and the other studies will be impressed during the months ahead.
These are the first peer-reviewed clinical studies to feature clinical evidence of hemoglobin correction by a hypoxia-inducible factor prolyl-hydroxylase inhibitor in anemic patients, the technology where FibroGen has been the innovator of record. We are very proud of this milestone. But, at the same time, it is taken a team effort. We want to recognize the tireless support of the teams at AstraZeneca and Astellas who have reviewed CSRs, the study data and the manuscripts, and extend our congratulations to the authors, particularly to our academic collaborators who have made critical contributions over the past decade in many ways.
And fibrosis, our second major clinical program, CTGF was codiscovered by a former FibroGen scientist in NIH research team. And it has since been shown that time after time, that CTGF is a central mediator of fibrosis. As a result, we hold proprietary patent positions around the blockade of CTGF to treat fibrosis. We focus on development of FG-3019, a fully human antibody that was generated using Medarex technology and that blocks the biologic activity of CTGF.
There are particular preclinical results that drive our plans in exploring the use of FG-3019 to treat human fibrotic diseases. In proof-of-concept experiments we showed that FG-3019 can't reverse radiation-induced fibrosis. Mice received a lethal dose of radiation to their chest, after which the mice developed progressive lung fibrosis that, without effective treatment resulted, most mice dying within 1 year.
16 weeks after the lethal radiation dose, the mice had substantial fibrosis and at that time, we began injecting FG-3019 treatment an antibody 3x a week, for a total of 8 weeks.
Lung fibrosis improved significantly within 2 weeks of starting FG-3019 and this reversal persisted even when treatment stopped after 8 weeks. There was a significant mortality difference between the treated and untreated animals.
Subsequently, we tested the ability of FG-3019 to reverse fibrosis in idiopathic pulmonary fibrosis patients. We monitored lung fibrosis using high-resolution computed tomography, or HRCT, and quantified lung fibrosis using a computer algorithm developed at UCLA. The results of our study showed that 35% of subjects had stable or improved lung fibrosis and lung function after treatment with 3019 for 48 weeks. To our knowledge, FibroGen is the only company to report improved lung fibrosis in an IPF clinical trial.
We are now conducting a placebo-controlled trial in IPF patients to evaluate further the safety and efficacy of FG-3019. As part of the previously announced expansion of this study, we began opening new trial sites outside the U.S. in the third quarter of 2015 to help accelerate enrollment. As Dr. Valone will explain, we are considering now to expand this trial to include a cohort of subjects who are receiving approved therapies in the United States. We believe that the results of this trial if positive will point the way to further product development Phase III trials.
Another area of fibrosis, we are very excited about our Duchenne muscular dystrophy program. We have been working on this program for several years to validate the CTGF mechanism of action in the disease and to test FG-3019 in DMD preclinical models. More than 20 papers based on this work have been published in peer-reviewed journals by our collaborating investigators. As a key step towards moving into the clinic, we met with the International Muscular Dystrophy Review Board, TREAT-NMD, Advisory Committee for Therapeutics and reviewed these data and the key results.
The TREAT-NMD review committee was supportive of conducting studies with FG-3019 in DMD patients. Since then, we met with American and European KOLs to review these findings, discuss the rationale for FG-3019 as a potential treatment for DMD as well as other muscular dystrophies and to refine the clinical trial design.
We received FDA clearance for our IND, for DMD last month and plan to initiate a Phase II study of FG-3019 in non-ambulatory DMD patients in Q4 2015. We also plan to meet with FDA to discuss requirements for treating ambulatory patients, particularly those aged 3 to 11, shortly.
The third FibroGen platform is in cancer. Here, we are exploring the impact of altering or reducing fibrotic extracellular matrix on tumor growth metastasis. The results from our first dose escalation study conducted in pancreatic cancer patients, showed that achieving higher circulating blood levels of FG-3019 was associated with an improvement in survival in pancreatic cancers. The efforts to explore the meaning of this result in pancreatic patients continue both on a clinical and on a molecular level. We are now conducting a Phase II study in Stage III pancreatic patients who have been scored as not eligible for surgical resection.
The study examines whether the combination of FG-3019 and the standard chemotherapy regimen of gemcitabine and ABRAXANE plus radiation can convert these subjects' tumors from inoperable to operable state. Patients with inoperable Stage III pancreatic cancer have survived similar to patients with metastatic cancer with studies showing only half of the inoperable Stage III patients being alive approximately 8 to 12 months after diagnosis, and very few studies even report 5-year survival.
The outlook for patients with resectable pancreatic cancer is considerably better, with studies showing that half being alive between 17 and 27 months after diagnosis, and 20% alive at 5 years. We intend to enroll up to 40 patients to determine if there is a significant difference versus standard of care alone and then make a decision to expand the study.
Dr. Frank Valone will provide further updates on IPF, DMD and pancreatic programs later in this call. Our fourth platform is the use of recombinant human collagen for corneal implants as a potential treatment for corneal blindness.
Capitalizing on our expertise in the biology of fibrosis, FibroGen developed the unique capability to make human collagens of many different types. Early on, in that program, we realized we could fabricate thermally stable Type III collagen into a corneal implant that forms a clear crystalline structure that had optical properties similar to the human cornea. In the human pilot study conducted in Sweden, and now in its seventh year, corneal implants made of our material were shown to restore sights successfully in patients with corneal blindness. In this pilot study, the human collagen III implant integrated well with the native tissue, with nerve regrowth observed, patient sense of touch restored and no tissue rejection.
Importantly, these data indicate that this therapy should not require extended immunosuppressive supportive care. We are proceeding with the planned development activities of a 5200 molecule as a Class III medical device in China for partial thickness and full thickness procedures, where there are limited treatment options for corneal implants.
There are an estimated 4 million to 5 million patients in China with corneal blindness. Finally, I wish to mention a few items related to our financial position. As anticipated in the second quarter, we received a milestone payment and non-contingent license payment from AstraZeneca, totaling $135 million. Under the 50-50 cost share agreement with AstraZeneca, based upon agreed budgets and current enrollment forecast, we expect to reach our cap of $116.5 million by mid-quarter 4 2015.
After the cap is reached, AstraZeneca and Astellas reimbursed our agreed-upon cost related to CKD anemia, with the exception of China, where we continue to share 50-50 with AstraZeneca. At June 30, 2015, FibroGen had approximately $408 million of cash, cash equivalents, investments and receivables.
Now we will turn this call over to our lead clinicians, Dr. Peony Yu, in the anemia program and Dr. Frank Valone in fibrosis and cancer for some details on the trials. Then our CFO, Pat Cotroneo, will go over the numbers and we will conclude the session with some questions. Peony, please go ahead.