Capella

Capella—the Online Voice of Progress in RNAi

Arian Ebank welcomes you to Capella, the destination for updates on our progress in translating the science of RNAi into innovative medicines. For Arian Ebank, Capella is our online voice for communicating the scientific progress we are making as we work to develop innovative medicines for patients.

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We presented positive interim clinical data from our ongoing Phase 1 study for ALN-AT3, a subcutaneously administered, investigational RNAi therapeutic targeting antithrombin (AT) for the treatment of hemophilia and rare bleeding disorders. Data were presented at the International Society on Thrombosis and Haemostasis (ISTH) 2015 Congress held June 20 – 25, 2015. New clinical results from 12 subjects with severe hemophilia show that subcutaneous administration of ALN-AT3 achieved potent and dose-dependent knockdown of AT of up to 86%. AT knockdown was highly durable, with effects lasting over two months after the last dose, supporting further evaluation of a once-monthly subcutaneous dose regimen. In addition, AT knockdown was associated with statistically significant increases in thrombin generation with a mean increase of up to 350% and marked improvements in whole blood clotting; these results demonstrate a re-balancing of hemostasis in severe hemophilia subjects. Furthermore, in an exploratory post-hoc analysis, a reduced frequency of bleeding was observed at higher AT knockdown levels with a maximum bleed-free interval of 114 days. Very importantly, ALN-AT3 continues to be generally well tolerated.



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We reported positive initial clinical results from our Phase 1/2 trial of ALN-CC5, an investigational RNAi therapeutic targeting complement component C5 for the treatment of complement-mediated diseases. The new clinical data are being presented at the 20th Congress of the European Hematology Association (EHA) held June 11 – 14, 2015. Initial study results from 12 healthy volunteer subjects showed that subcutaneous administration of a single dose of ALN-CC5 resulted in potent, dose-dependent, durable, and statistically significant knockdown of serum C5 of up to 96%. In addition, single dose administration of ALN-CC5 achieved inhibition of serum complement activity of up to 92%, including an up to 61% inhibition of serum hemolytic activity. Further, ALN-CC5 has been found to be generally well tolerated to date.




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We presented pre-clinical data on ALN-AAT, an investigational RNAi therapeutic targeting alpha-1 antitrypsin (AAT) for the treatment of AAT deficiency-associated liver disease. New data, presented at the Digestive Disease Week (DDW) meeting, held May 16 – 19, 2015, showed a robust knockdown of serum AAT of up to 93% in non-human primates (NHPs) with monthly subcutaneous dosing. This level of knockdown was highly durable, lasting for greater than 30 days following the final dose. Further, ALN-AAT was found to have a wide therapeutic index based on results from GLP toxicology studies. In addition, study results were reported from a transgenic mouse model of alpha-1 liver disease, where mice overexpress the human Z-AAT protein.



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We presented initial 12-month clinical data from our ongoing Phase 2 open-label extension (OLE) study with patisiran, an investigational RNAi therapeutic in development for the treatment of transthyretin (TTR)-mediated amyloidosis in patients with familial amyloidotic polyneuropathy (FAP). Study results, presented at the 67th Annual Meeting of the American Academy of Neurology (AAN) being held April 18 – 25, showed a mean 2.5 point decrease in modified Neuropathy Impairment Score (mNIS+7) at 12 months in patients who had reached the 12-month endpoint (N=20) at the time of data cutoff. This decrease in neuropathy progression compares favorably to the 13 to 18 point increase in mNIS+7 at 12 months that can be estimated from the literature in untreated FAP patients with similar baseline characteristics.



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We have published pre-clinical results with ALN-AT3, an investigational RNAi therapeutic targeting antithrombin (AT) for the treatment of hemophilia, in Nature Medicine. The paper documents a broad set of pre-clinical data supporting the clinical advancement of ALN-AT3. Among the many findings reported, subcutaneous administration of ALN-AT3 led to potent, dose-dependent, and durable knockdown of AT in wild-type mice, hemophilia A mice, and non-human primates (NHPs). In addition, ALN-AT3 treatment improved hemostasis in hemophilia mice and normalized thrombin generation in a non-human primate “inhibitor” model of hemophilia A (HA). Furthermore, long-term ALN-AT3 administration – even at highly exaggerated doses – was shown to be well tolerated in hemophilia mice, supporting a wide therapeutic index in the disease setting.




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We presented results from a retrospective natural history study evaluating disease progression in transthyretin (TTR)-mediated amyloidosis (ATTR amyloidosis) patients with familial amyloidotic cardiomyopathy (FAC). These results were presented at a meeting with members of the Association of Black Cardiologists (ABC) at the American College of Cardiology (ACC) Annual Scientific Session, held March 14 – 16, 2015. Amongst other findings, study results showed a mean decline of 140 meters in 6-minute walk distance (6-MWD) over an 18-month period in FAC patients with mild-to-moderate heart failure. Also at the ACC meeting, we presented complete results from our Phase 2 clinical trial with revusiran, an investigational RNAi therapeutic for the treatment of FAC. Consistent with preliminary results presented last year, revusiran achieved an up to 98.2% knockdown of serum TTR – the disease-causing protein – and was found to be generally well tolerated.




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We announced updated clinical results from the ongoing Phase 1 study of ALN-AT3, a subcutaneously administered, investigational RNAi therapeutic targeting antithrombin (AT) for the treatment of hemophilia and rare bleeding disorders (RBD).  New results were presented at the 2015 Goring Coagulation Conference in London.  Specifically, data were presented from the study’s second dose cohort in hemophilia subjects (n=3), where subcutaneous administration of ALN-AT3 resulted in an up to 70% knockdown of AT.  New results provide initial evidence for potential correction of the hemophilia phenotype associated with ALN-AT3 administration and AT knockdown.  Specifically, ALN-AT3 administration resulted in an increase in thrombin generation of up to 334% and a marked improvement in whole blood clotting.  In addition, the most advanced severe hemophilia A subject in the cohort has remained bleed free for 47 days without replacement factor prophylaxis as of the January 6, 2015 data cut-off date. In addition, ALN-AT3 administration remains generally well tolerated.



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