FibroGen Announces Topline Results from LELANTOS-2, a Phase 3 Clinical Study of Pamrevlumab in Ambulatory
Duchenne Muscular Dystrophy

2023-08-29

临床结果临床3期孤儿药快速通道引进/卖出

– Study did not meet the primary endpoint – – Pamrevlumab was generally safe and well tolerated – SAN FRANCISCO, Aug. 29, 2023 (GLOBE NEWSWIRE) -- FibroGen, Inc., (NASDAQ: FGEN) today announced topline data from the Phase 3 LELANTOS-2 trial of pamrevlumab for the treatment of ambulatory patients with

Duchenne muscular dystrophy (DMD)

on background systemic corticosteroids. The study did not meet the primary endpoint of change in the North Star Ambulatory Assessment (NSAA) total score from baseline to week 52 (placebo-corrected mean difference -0.528 points; 95% CI -2.308 to 1.251; p=0.5553). Secondary endpoints measured by change from baseline at week 52 in 4-stair climb velocity, 10-meter walk/run test, time to stand, time to loss of ambulation, and proportion of patients with greater than 10 seconds in the 10-meter walk/run test were also not met. “We are deeply disappointed that the LELANTOS-2 study did not meet its primary endpoint,” said Thane Wettig, Interim Chief Executive Officer, FibroGen. “We are grateful for the courageous efforts of patients, their caregivers, the advocacy community, and the trial investigators who have contributed to this important clinical study. We are committed to sharing all learnings from this trial with the Duchenne community and hope that there are insights that may help future efforts to develop treatments for this devastating disease.” Preliminary safety data showed that pamrevlumab was generally safe and well tolerated. The majority of treatment emergent adverse events were mild or moderate. Treatment-emergent serious adverse events were observed in 8.3% of patients in the pamrevlumab group and 2.8% of patients in the placebo group. FibroGen is in the process of evaluating the totality of the data, including other pre-specified endpoints, to determine the next steps for the program. The Company plans to communicate the full results of the LELANTOS-2 study at an upcoming medical forum. About LELANTOS-2 A total of 73 boys with ambulatory

DMD

ages 6 to <12 years were enrolled in LELANTOS-2, a global, Phase 3, randomized, double-blind trial of pamrevlumab or placebo in combination with systemic corticosteroids. The primary endpoint of the study was ambulatory function measured by change in the North Star Ambulatory Assessment (NSAA) total score from baseline to Week 52. Secondary endpoints assessed from baseline to Week 52 included changes in 4-stair climb velocity, 10-meter walk/run test, time to stand, time to loss of ambulation, and proportion of patients with greater than 10 seconds in the 10-meter walk/run test. In LELANTOS-2, patients were dosed with pamrevlumab (35 mg/kg IV on Day 1 and every two weeks thereafter with last dose at Week 52) or placebo. About

Duchenne Muscular Dystrophy

Duchenne muscular dystrophy (DMD)

is a rare and debilitating

neuromuscular disease

that affects approximately 1 in every 5,000 newborn boys. About 20,000 children are diagnosed with

DMD

globally each year. The fatal disease is caused by a genetic mutation leading to the absence or defect of

dystrophin

, a protein necessary for normal muscle function. The absence of

dystrophin

results in

muscle weakness

muscle loss

fibrosis

, and

inflammation

. Patients with

DMD

are often wheelchair-bound before the age of 12, and their

progressive muscle weakness

may lead to serious medical problems relating to respiratory and cardiac muscle. About Pamrevlumab Pamrevlumab is a potential first-in-class antibody being developed by FibroGen to inhibit the activity of

connective tissue growth factor (CTGF)

, a common factor in fibrotic and proliferative disorders characterized by persistent and excessive scarring that can lead to organ dysfunction and failure. Pamrevlumab is in Phase 3 clinical development for the treatment of

ambulatory Duchenne muscular dystrophy (DMD)

, and

locally advanced unresectable pancreatic cancer (LAPC)

, and in Phase 2/3 for the treatment of

metastatic pancreatic cancer

. The U.S. Food and Drug Administration has granted Orphan Drug Designation to pamrevlumab for treatment of patients with

DMD

and

pancreatic cancer

, and Fast Track designation to pamrevlumab for the treatment of patients with

DMD

and LAPC. The U.S. Food and Drug Administration has also granted Rare Pediatric Disease Designation to pamrevlumab for the treatment of patients with

DMD

. Pamrevlumab has demonstrated a safety and tolerability pro has supported ongoing clinical investigation in

DMD

, LAPC, and

metastatic pancreatic cancer

. Pamrevlumab is an investigational drug and not approved for marketing by any regulatory authority. For information about our pamrevlumab studies please visit About FibroGen FibroGen, Inc. is a biopharmaceutical company committed to discovering, developing, and commercializing a pipeline of first-in-class therapeutics. The Company applies its pioneering expertise in

connective tissue growth factor (CTGF)

biology and

hypoxia-inducible factor (HIF)

to advance innovative medicines for the treatment of unmet needs. Pamrevlumab, a fully human anti-CTGF monoclonal antibody, is in clinical development for the treatment of

locally advanced unresectable pancreatic cancer (LAPC)

metastatic pancreatic cancer

, and ambulatory Duchenne

muscular dystrophy (DMD)

. Roxadustat (爱瑞卓®, EVRENZO™) is currently approved in China, Europe, Japan, and numerous other countries for the treatment of

anemia

CKD

patients on dialysis and not on dialysis. Roxadustat is in clinical development for

chemotherapy-induced anemia (CIA)

in China. FibroGen recently expanded its research and development portfolio to include product candidates in the immuno-oncology space along with an exclusive license for FG-3246. For more information, please visit . Forward-Looking Statements This release contains forward-looking statements regarding FibroGen’s strategy, future plans and prospects, the development and commercialization of the company’s product candidates, the potential safety and efficacy pro its product candidates, and the potential impact of clinical data. These forward-looking statements include, but are not limited to, statements about FibroGen’s plans and objectives and typically are identified by use of terms such as “may,” “will”, “should,” “on track,” “could,” “expect,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “potential,” “continue” and similar words, although some forward-looking statements are expressed differently. FibroGen’s actual results may differ materially from those indicated in these forward-looking statements due to risks and uncertainties related to the continued progress and timing of its various programs, including the enrollment and results from ongoing and potential future clinical trials, and other matters that are described in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022 and our Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, each as filed with the Securities and Exchange Commission (SEC), including the risk factors set forth therein. Investors are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this release, and FibroGen undertakes no obligation to update any forward-looking statement in this press release, except as required by law. Contacts: FibroGen, Inc. Investors: David DeLucia, CFA Vice President, Corporate FP&A and Investor Relations ddelucia@fibrogen.com Media: Michael Szumera External Communications mszumera@fibrogen.com

FibroGen Announces Topline Results from LELANTOS-2, a Phase 3 Clinical Study of Pamrevlumab in Ambulatory Duchenne Muscular Dystrophy

FibroGen Announces Topline Results from LELANTOS-2, a Phase 3 Clinical Study of Pamrevlumab in Ambulatory
Duchenne Muscular Dystrophy