REGN Regeneron Pharmaceuticals Inc

Regeneron Pharmaceuticals, Inc. (NASDAQ: REGN) today announced the primary endpoint was met in the Phase 3 QUASAR trial investigating EYLEA HD® (aflibercept) Injection 8 mg for the treatment of patients with macular edema following retinal vein occlusion (RVO), including those with central, branch and hemiretinal vein occlusions. In the trial, patients treated with EYLEA HD every 8 weeks (after initial monthly doses) experienced non-inferior vision gains compared to those treated with the approved monthly dosing regimen of EYLEA® (aflibercept) Injection 2 mg, the current standard of care. These data will be submitted to regulatory authorities around the world, with a submission to the U.S. Food and Drug Administration (FDA) planned for the first quarter of 2025, and are planned for presentation at an upcoming medical meeting.

“All currently FDA-approved anti-VEGF therapies for retinal vein occlusion require monthly dosing, which can be burdensome for a patient. These impressive data from QUASAR demonstrated that EYLEA HD patients with retinal vein occlusion experienced improved vision with fewer injections than EYLEA – which could offer a significant advancement in this treatment setting,” said Seenu M. Hariprasad, M.D., Chair of the Department of Ophthalmology and Visual Science, The University of Chicago. “Furthermore, about 90% of EYLEA HD patients were able to maintain 8-week dosing intervals through 36 weeks.”

QUASAR is a global, double-masked, active-controlled Phase 3 trial evaluating the efficacy and safety of EYLEA HD, compared to EYLEA, in patients with RVO. EYLEA HD patients were treated with an 8-week dosing regimen (after 3 or 5 initial monthly doses), and EYLEA patients were treated every 4 weeks. The primary endpoint was met at 36 weeks, with both groups of EYLEA HD patients achieving non-inferior visual acuity gains compared to those receiving EYLEA. EYLEA HD results were consistent across patients with branch retinal vein occlusions, and those with central retinal or hemiretinal vein occlusions.

Outcomes at 36 weeks were as follows:

	EYLEA4-week regimen(n=301)	EYLEA HD8-week regimen after3 initial monthly doses(n=293)		EYLEA HD8-week regimen after5 initial monthly doses(n=298)
Mean observed BCVA improvement	17.8 letters	17.0 letters		19.1 letters
Least squares mean difference in BCVA improvement, primary endpoint (non-inferiority p-value)*		-0.1(p<0.0001)		0.8(p<0.0001)
Mean observed BCVA	72.0 letters	72.8 letters		74.6 letters
Patients maintained on every 8-week dosing interval		88%		93%

BCVA: best corrected visual acuity*Non-inferiority (1-sided) p-values are for the difference in least squares mean compared to EYLEA with margin of 4 letters. EYLEA HD groups met non-inferiority.

The safety profile of EYLEA HD (n=591) was similar to EYLEA (n=301) in QUASAR and remained generally consistent with the known safety profile of EYLEA HD in its pivotal trials. Ocular treatment emergent adverse events (TEAEs) occurring in ≥5% of all EYLEA HD patients included increased ocular pressure (5%), and there was one case each of endophthalmitis and retinal vasculitis. The rate of intraocular inflammation was 0.5% for EYLEA HD and 1.3% for EYLEA. Hypertension at baseline was present in 66% of EYLEA HD patients and 62% of EYLEA patients. Hypertension during the trial was reported in 8.1% of EYLEA HD patients and 4.7% of EYLEA patients. Thromboembolic events (APTC) occurred in 0.5% of EYLEA HD patients and 1.7% of EYLEA patients. 

“With these pivotal results in retinal vein occlusion, EYLEA HD with extended dosing has again met the high bar of vision gains and safety seen with standard-of-care EYLEA,” said George D. Yancopoulos, M.D., Ph.D., Board co-Chair, President and Chief Scientific Officer at Regeneron, and a principal inventor of EYLEA. “EYLEA HD has already made a significant impact on the treatment of its three approved indications – wet age-related macular degeneration, diabetic macular edema and diabetic retinopathy – and now has the potential to substantially reduce the treatment burden for patients with retinal vein occlusion. We look forward to sharing these results with regulatory authorities around the world as soon as possible.”

EYLEA HD (known as Eylea™ 8 mg in the European Union and Japan) is being jointly developed by Regeneron and Bayer AG. In the U.S., Regeneron maintains exclusive rights to EYLEA and EYLEA HD. Bayer has licensed the exclusive marketing rights outside of the U.S., where the companies share equally the profits from sales of EYLEA and EYLEA HD.

The safety and efficacy of EYLEA HD for the treatment of RVO has not been evaluated by any regulatory authority.

About the QUASAR TrialQUASAR is a global double-masked, active-controlled Phase 3 trial evaluating the efficacy and safety of EYLEA HD in patients with macular edema secondary to RVO, including those with central retinal vein occlusion, branch retinal vein occlusion, or hemiretinal vein occlusion.

In the trial, patients were randomized into three groups to receive either: EYLEA HD every 8 weeks following 3 initial monthly doses; EYLEA HD every 8 weeks following 5 initial monthly doses; or EYLEA every 4 weeks. The primary endpoint was mean change in BCVA from randomization through week 36, as measured by the Early Treatment Diabetic Retinopathy Study letter score.

Patients in the EYLEA HD groups can have their dosing intervals shortened to a minimum of every 4 weeks throughout the trial if protocol-defined criteria for disease progression are met. Dosing intervals may be extended based on protocol-defined criteria starting at week 32 for patients who receive EYLEA or EYLEA HD after 3 initial monthly doses or at week 40 for patients who receive EYLEA HD after 5 initial monthly doses, with follow-up planned through week 64.

QUASAR is being operationalized by Bayer under a collaboration agreement with Regeneron.

About Retinal Vein Occlusion RVO is a common cause of vision loss in adults and the second most common retinal vascular disease. RVO occurs when there is a blockage in a vein in the retina, which leads to a buildup of blood, restricted blood flow, increased pressure and sometimes pain in the eye. RVO may cause sudden blurry vision or vision loss and can ultimately result in serious complications like swelling in the eye called macular edema.

A protein called vascular endothelial growth factor (VEGF) is instrumental in causing the vascular leakage that leads to macular edema. When a vein in the retina is blocked, the levels of VEGF increase, which spurs new blood vessel growth. Too much VEGF can lead to the formation of abnormal blood vessels and may cause vision to become blurry. Anti-VEGF injections are commonly used to treat macular edema due to RVO.

There are two main types of RVO: central retinal vein occlusion (CRVO) and branch retinal vein occlusion (BRVO). In CRVO, the buildup occurs in the eye’s central retinal vein and in BRVO, the buildup occurs in one of the smaller branch veins. Globally, RVO affects over 28 million people.

About Ophthalmology at Regeneron At Regeneron, we relentlessly pursue groundbreaking innovations in eye care science to help maintain the eye health of the millions of Americans impacted by vision-threatening conditions. Over a decade ago, our breakthrough scientific research resulted in the development of EYLEA, a vascular endothelial growth factor (VEGF) inhibitor designed to block the growth of new blood vessels and decrease the ability of fluid to pass through blood vessels in the eye. EYLEA has since brought fundamental change to the retinal disease treatment landscape and is supported by a robust body of research.

Regeneron continues to advance our anti-angiogenesis expertise with new solutions with the aim of offering optimal flexibility for a broad group of patients and eye care professionals. This includes EYLEA HD, which has been developed with the aim of extending the time between injections, while maintaining the vision gains, anatomic benefits and safety previously observed with EYLEA.

IMPORTANT SAFETY INFORMATION AND INDICATIONS

INDICATIONS EYLEA HD® (aflibercept) Injection 8 mg is a prescription medicine approved for the treatment of patients with Wet Age-Related Macular Degeneration (AMD), Diabetic Macular Edema (DME), and Diabetic Retinopathy (DR).

EYLEA® (aflibercept) Injection 2 mg is a prescription medicine approved for the treatment of patients with Wet Age-Related Macular Degeneration (AMD), Macular Edema following Retinal Vein Occlusion (RVO), Diabetic Macular Edema (DME), Diabetic Retinopathy (DR), and Retinopathy of Prematurity (ROP) (0.4 mg).

IMPORTANT SAFETY INFORMATION

• EYLEA HD and EYLEA are administered by injection into the eye. You should not use EYLEA HD or EYLEA if you have an infection in or around the eye, eye pain or redness, or known allergies to any of the ingredients in EYLEA HD or EYLEA, including aflibercept.
• Injections into the eye with EYLEA HD or EYLEA can result in an infection in the eye, retinal detachment (separation of retina from back of the eye) and, more rarely, serious inflammation of blood vessels in the retina that may include blockage. Call your doctor right away if you or your baby (if being treated with EYLEA for Retinopathy of Prematurity) experience eye pain or redness, light sensitivity, or a change in vision after an injection.
• In some patients, injections with EYLEA HD or EYLEA may cause a temporary increase in eye pressure within 1 hour of the injection. Sustained increases in eye pressure have been reported with repeated injections, and your doctor may monitor this after each injection.
• In infants with Retinopathy of Prematurity (ROP), treatment with EYLEA will need extended periods of ROP monitoring.
• There is a potential but rare risk of serious and sometimes fatal side effects, related to blood clots, leading to heart attack or stroke in patients receiving EYLEA HD or EYLEA.
• The most common side effects reported in patients receiving EYLEA HD were cataract, increased redness in the eye, increased pressure in the eye, eye discomfort, pain, or irritation, blurred vision, vitreous (gel-like substance) floaters, vitreous detachment, injury to the outer layer of the eye, and bleeding in the back of the eye.
• The most common side effects reported in patients receiving EYLEA were increased redness in the eye, eye pain, cataract, vitreous detachment, vitreous floaters, moving spots in the field of vision, and increased pressure in the eye.
• The most common side effects reported in pre-term infants with ROP receiving EYLEA were separation of the retina from the back of the eye, increased redness in the eye, and increased pressure in the eye. Side effects that occurred in adults are considered applicable to pre-term infants with ROP, though not all were seen in clinical studies.
• You may experience temporary visual changes after an EYLEA HD or EYLEA injection and associated eye exams; do not drive or use machinery until your vision recovers sufficiently.
• For additional safety information, please talk to your doctor and see the full Prescribing Information for EYLEA HD and EYLEA.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088.

Please click here for full Prescribing Information for EYLEA HD and EYLEA.

About RegeneronRegeneron (NASDAQ: REGN) is a leading biotechnology company that invents, develops and commercializes life-transforming medicines for people with serious diseases. Founded and led by physician-scientists, our unique ability to repeatedly and consistently translate science into medicine has led to numerous approved treatments and product candidates in development, most of which were homegrown in our laboratories. Our medicines and pipeline are designed to help patients with eye diseases, allergic and inflammatory diseases, cancer, cardiovascular and metabolic diseases, neurological diseases, hematologic conditions, infectious diseases, and rare diseases.

Regeneron pushes the boundaries of scientific discovery and accelerates drug development using our proprietary technologies, such as VelociSuite®, which produces optimized fully human antibodies and new classes of bispecific antibodies. We are shaping the next frontier of medicine with data-powered insights from the Regeneron Genetics Center® and pioneering genetic medicine platforms, enabling us to identify innovative targets and complementary approaches to potentially treat or cure diseases.

For more information, please visit www.Regeneron.com or follow Regeneron on LinkedIn, Instagram, Facebook or X.

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