Novartis announces FDA filing acceptance and Priority Review of brolucizumab (RTH258) for patients with wet AMD
Novartis announces FDA filing acceptance and Priority Review of brolucizumab (RTH258) for patients with wet AMD
? By 2020, over 1.5 million people in the US are likely to have wet AMD, the leading cause of blindness in industrialized countries
? Filing is based on Phase III data from the HAWK and HARRIER trials for brolucizumab
? Novartis used a priority review voucher to expedite review of brolucizumab in the US and, if approved by FDA, anticipates launching by the end of 2019
Basel, Novartis announced that the US Food and Drug Administration (FDA)
accepted the company's Biologics License Application (BLA) for brolucizumab (RTH258) for
the treatment of wet age-related macular degeneration (AMD), also known as neovascular
AMD, or nAMD. Seeking to make brolucizumab available as quickly as possible, Novartis
used a priority review voucher to expedite FDA review. If approved by the FDA, Novartis
anticipates launching brolucizumab by the end of 2019.
Estimates suggest that by 2020, 1.5 to 1.75 million people in the US will be living with wet
AMD, a leading cause of blindness worldwide and a rapidly growing public health concern1
.
As the disease progresses, patients may experience loss of central vision, resulting in an
inability to complete daily tasks. Without treatment, vision can rapidly deteriorate and may
lead to blindness2
.
?Reaching this milestone is an important step in our efforts to reimagine the treatment journey
for people with wet AMD and their caregivers,? said Fabrice Chouraqui, President, Novartis
Pharmaceuticals Corporation. ?We are looking forward to the potential of a new option for
patients with wet AMD, who often have to navigate considerable physical and emotional
difficulties caused by deteriorating vision.?
The regulatory application is primarily based on Phase III data from the HAWK and HARRIER
trials ? prospective, randomized, double-masked multi-center studies3,4
. The primary
endpoint of these studies was non-inferiority to aflibercept in mean change in best-corrected
visual acuity (BCVA) from baseline to week 48 (mean change in BCVA of 6.6 letters for
brolucizumab 6 mg versus 6.8 letters for aflibercept in HAWK and 6.9 letters versus 7.6
letters, respectively, in HARRIER). HAWK and HARRIER are the first and only global head-tohead trials in patients with wet AMD that prospectively demonstrated efficacy at week 48
starting with a 12-week dosing regimen.
Additionally, at week 48 in the studies, key secondary endpoint assessments showed
significantly fewer brolucizumab patients with disease activity (23.5% of brolucizumab 6 mg
patients versus 33.5% of aflibercept patients in HAWK, and 21.9% versus 31.4%,
respectively, in HARRIER (P=0.0022 for both) as well as retinal fluid ? key markers used by
physicians to help guide management of the disease in clinical practice (31% fewer patients
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on brolucizumab 6 mg had intra-retinal fluid (IRF) and/or sub-retinal fluid (SRF) in HAWK, and
26% fewer in HARRIER, versus aflibercept (P<0.0001 for both)5,6
.
?Wet AMD robs people of their precious sight and takes a major toll on the lives of millions of
people who face not only vision loss, but also the burden of frequent injections into their
eyes,? said Dawn Prall George, executive director, The Support Sight Foundation. ?We are
always excited about potential new treatment options and hopeful they may help people
manage this devastating disease.?
About brolucizumab (RTH258)
Brolucizumab (RTH258) is a humanized single-chain antibody fragment (scFv) and the most
clinically advanced, humanized single-chain antibody fragment to reach this stage of
development. Single-chain antibody fragments are highly sought after in drug development
due to their small size, enhanced tissue penetration, rapid clearance from systemic circulation
and drug delivery characteristics7-9
.
The proprietary innovative structure results in a small molecule (26 kDa) with potent inhibition
of, and high affinity to, all VEGF-A isoforms7,10
. In preclinical studies, brolucizumab inhibited
activation of VEGF receptors through prevention of the ligand-receptor interaction7,9,10
.
Increased signaling through the VEGF pathway is associated with pathologic ocular
angiogenesis and retinal edema11
. Inhibition of the VEGF pathway has been shown to inhibit
the growth of neovascular lesions, resolve retinal edema and improve vision in patients with
chorioretinal vascular diseases12
.
About HAWK and HARRIER study design
With more than 1,800 patients across nearly 400 sites worldwide, HAWK (NCT02307682) and
HARRIER (NCT02434328) are the first and only global head-to-head trials in patients with
nAMD that prospectively demonstrated efficacy at week 48 using an innovative q12w/q8w
regimen, with a majority of patients on q12w immediately following the loading phase3-5
. Both
studies are 96-week prospective, randomized, double-masked multi-center studies and part of
the Phase III clinical development of brolucizumab3,4,6
.
The studies were designed to compare the efficacy and safety of intravitreal injections of
brolucizumab 6 mg (HAWK and HARRIER) and 3 mg (HAWK only) versus aflibercept 2 mg in
patients with nAMD3,4. In both trials, patients were randomized to either brolucizumab or
aflibercept3,4. Immediately following the 3-month loading phase, patients in the brolucizumab
arms received a q12w dosing interval with an option to adjust to a q8w dosing interval based
on masked disease activity assessments at defined visits3,4. Aflibercept was dosed bi-monthly
according to its label at the time of study initiation3-6
.
Brolucizumab met the primary efficacy objective of non-inferiority versus aflibercept in mean
change in best-corrected visual acuity (BCVA) from baseline to week 48 with high statistical
significance5
. Additionally, brolucizumab demonstrated superiority in three secondary
endpoints considered key parameters of nAMD: central subfield retinal thickness, retinal fluid
(intraretinal fluid and/or subretinal fluid) and disease activity5
.
At year two, the most frequent ocular adverse events (=5% of patients in any treatment arm)
for brolucizumab 3 mg, 6 mg and aflibercept, respectively, in HAWK were conjunctival
hemorrhage (10.9%, 8.1% and 8.9%), reduced visual acuity (9.5%, 6.1% and 8.1%), vitreous
floaters (7.3%, 6.1% and 4.4%), eye pain (7.8%, 5.0% and 5.8%), retinal hemorrhage (3.9%,
5.8% and 5.6%), cataract (5.0%, 5.6% and 3.6%), vitreous detachment (6.7%, 5.3% and
5.3%) and dry eye (5.6%, 5.3% and 7.2%)5
. The incidences of these events for brolucizumab
6 mg and aflibercept, respectively, in HARRIER were conjunctival hemorrhage (4.6% and
5.1%), reduced visual acuity (8.6% and 7.0%), vitreous floaters (4.1% and 1.4%), eye pain
Page 3 of 5
(3.5% and 5.1%), retinal hemorrhage (3.2% and 1.1%), cataract (3.0% and 11.7%), vitreous
detachment (2.7% and 2.2%) and dry eye (2.7% and 3.0%)6
.
About neovascular age-related macular degeneration (nAMD or wet AMD)
nAMD is the leading cause of severe vision loss and legal blindness in people over the age of
65 in North America, Europe, Australia and Asia, impacting an estimated 20 to 25 million
people worldwide2,13. nAMD occurs when abnormal blood vessels form underneath the
macula, the area of the retina responsible for sharp, central vision. These blood vessels are
fragile and leak fluid, disrupting the normal retinal architecture and ultimately causing damage
to the macula1,14,15
.
Early symptoms of nAMD include distorted vision or metamorphopsia and difficulties seeing
objects clearly16
. Prompt diagnosis and intervention are essential. As the disease progresses,
cell damage increases, further reducing vision quality. This progression can lead to a
complete loss of central vision, leaving the patient unable to read, drive or recognize familiar
faces14
. Without treatment, vision can rapidly deteriorate2
.
About Novartis in ophthalmology
Novartis Ophthalmology is reimagining the treatment and prevention of visual impairment and
blindness. By pushing the boundaries of medicine and technology we?re developing lifechanging gene therapies, next-generation pharmaceuticals, and transformative technologies
for diseases and conditions spanning every area of eye disease, from the front to the back of
the eye.
Disclaimer
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Page 4 of 5
About Novartis
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References
1. American Academy of Ophthalmology. Age-related macular degeneration preferred practice patterns. Available
at: https://www.aao.org/preferred-practice-pattern/age-related-macular-degeneration-ppp-2015. Accessed March
2019.
2. van Lookeren Campagne M, et al. Mechanisms of age-related macular degeneration and therapeutic
opportunities. J Pathol. 2014; 232(2):151-64. doi: 10.1002/path.4266.
3. ClinicalTrials.gov. Identifier NCT02307682. Available at https://clinicaltrials.gov/ct2/show/NCT02307682 (link is
external). Accessed January 2019.
4. ClinicalTrials.gov. Identifier NCT02434328. Available at https://clinicaltrials.gov/ct2/show/NCT02434328 (link is
external). Accessed January 2019.
5. Dugel P, et al. HAWK & HARRIER: 48-week results of 2 multi-centered, randomized, double-masked trials of
brolucizumab versus aflibercept for neovascular AMD. Presented at: The American Academy of Ophthalmology
2017 Annual Meeting on November 10, 2017, New Orleans.
6. Dugel P, et al. Phase 3, randomized, double-masked, multi-center trials of brolucizumab versus aflibercept for
neovascular AMD: 96-week results from the HAWK and HARRIER studies. Presented at: The American
Academy of Ophthalmology on October 27, 2018, Chicago.
7. Escher D, et al. Single-chain antibody fragments in ophthalmology. Oral presentation at EURETINA congress.
2015. Abstract.
8. Nimz EL, et al. Intraocular and systemic pharmacokinetics of brolucizumab (RTH258) in nonhuman primates.
The Association for Research in Vision and Ophthalmology (ARVO) annual meeting. 2016. Abstract 4996.
9. Gaudreault J, et al. Preclinical pharmacology and safety of ESBA1008, a single-chain antibody fragment,
investigated as potential treatment for age related macular degeneration. ARVO Annual Meeting abstract. Invest
Ophthalmol Vis Sci 2012;53:3025. http://iovs.arvojournals.org/article.aspx?articleid=2354604 (link is external).
Accessed January 2019.
10. Tietz J, et al. Affinity and Potency of RTH258 (ESBA1008), a Novel Inhibitor of Vascular Endothelial Growth
Factor A for the Treatment of Retinal Disorders. IOVS. 2015; 56(7):1501.
11. Qazi Y, et al. Mediators of ocular angiogenesis. J. Genet. 2009;88(4):495-515.
12. Kim R. Introduction, mechanism of action and rationale for anti-vascular endothelial growth factor drugs in agerelated macular degeneration. Indian J Ophthalmol. 2007;55(6):413-415.
13. Wong, W.L. et al. Global prevalence of age-related macular degeneration and disease burden projection for
2020 and 2040: a systematic review and met analysis. Lancet Glob Health. 2014 Feb;2 (2):e106-16.
14. World Health Organization. Priority eye diseases: Age-related macular degeneration. Available at
http://www.who.int/blindness/causes/priority/en/index7.html (link is external). Accessed January 2019.
15. NHS Choices. Macular Degeneration. Available at http://www.nhs.uk/Conditions/Maculardegeneration/Pages/Introduction.aspx (link is external). Accessed January 2019.
16. NHS Choices. Macular Degeneration - Symptoms. Available at http://www.nhs.uk/Conditions/Maculardegeneration/Pages/Symptoms.aspx (link is external). Accessed January 2019.
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