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Trial resultsH2 2026a window, not a day

Phase 1/2 MAD-cohort readouts for siRNA programs in DM1 and FSHD

Sarepta expects to report results from its Phase 1/2 study of siRNA candidates (DM1 and FSHD programs) for Myotonic dystrophy type 1; facioscapulohumeral muscular dystrophy in the second half of 2026 (no exact date yet). Phase 1/2 is an early study that checks safety and takes a first look at effect.

Plain-English summary generated from this entry’s own fields (drug, condition, stage, date). Glossary

DetailsClinical trial results · also called: readout / topline data
Company
Sarepta Therapeutics, Inc. SRPT
Drug
siRNA candidates (DM1 and FSHD programs)
For
Myotonic dystrophy type 1; facioscapulohumeral muscular dystrophy
Stage
Phase 1/2 · an early study that checks safety and takes a first look at effect
When
H2 2026 · the company gave a window, not a day; the calendar never invents one
Source note
Per Q2 2026 earnings release (Aug 5, 2026): readouts from the multiple-ascending-dose cohorts of ongoing Phase 1/2 studies in DM1 and FSHD remain on track for 2H 2026.
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Sarepta Therapeutics, Inc.
4 upcoming · 4 past catalysts
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MilestoneSRPTSareptaQ4 2026

ELEVIDYS ENDEAVOR Cohort 8 full enrollment expected by year-end 2026, expected in Q4 2026 (Oct–Dec) (no exact date yet). A company milestone for Sarepta (ELEVIDYS (delandistrogene moxeparvovec) for Duchenne muscular dystrophy): a step in the program rather than a decision or a data readout.

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Entry
ELEVIDYS ENDEAVOR Cohort 8 full enrollment expected by year-end 2026 · Company milestone
Drug
ELEVIDYS (delandistrogene moxeparvovec)
For
Duchenne muscular dystrophy
Stage
Phase 1b (ENDEAVOR Cohort 8)
When
Q4 2026 · the company gave a window, not a day
Source note
Q2 2026 earnings PR (Aug 5, 2026) guides to completing enrollment of ENDEAVOR Cohort 8 by year-end 2026, ahead of the already-tracked Q1 2027 12-week data readout.
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Trial resultsSRPTSareptaQ1 2027

Sarepta expects to report results from its Phase 1b (ENDEAVOR Cohort 8) study of ELEVIDYS (delandistrogene moxeparvovec) + immunosuppressant regimen for Duchenne muscular dystrophy (gene therapy safety/immunosuppression cohort) in Q1 2027 (Jan–Mar) (no exact date yet). This is the first look at whether the drug did what the company hoped.

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Entry
ENDEAVOR Cohort 8 12-week data for ELEVIDYS with immunosuppression · Clinical trial results (readout / topline data)
Drug
ELEVIDYS (delandistrogene moxeparvovec) + immunosuppressant regimen
For
Duchenne muscular dystrophy (gene therapy safety/immunosuppression cohort)
Stage
Phase 1b (ENDEAVOR Cohort 8)
When
Q1 2027 · the company gave a window, not a day
Source note
Q2 2026 earnings release guides full enrollment of ENDEAVOR Cohort 8 by year-end 2026 and 12-week data from the full cohort in Q1 2027 — key to ELEVIDYS's path back to broader use after 2026 safety events and label restriction to ambulatory patients.
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FDA decisionSRPTSareptaFeb 28, 2027

The FDA is due to decide by Feb 28, 2027 whether to approve Sarepta’s AMONDYS 45 (casimersen) / VYONDYS 53 (golodirsen) for Duchenne muscular dystrophy (exon 45 / exon 53 skipping). Approval clears it for sale in the US; a rejection usually arrives as a letter listing what has to be fixed first.

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Entry
PDUFA date for AMONDYS 45 and VYONDYS 53 sNDAs (conversion to full approval) in DMD · FDA decision due (PDUFA date)
Drug
AMONDYS 45 (casimersen) / VYONDYS 53 (golodirsen)
For
Duchenne muscular dystrophy (exon 45 / exon 53 skipping)
Stage
sNDA under FDA review
When
Feb 28, 2027
Source note
FDA accepted sNDAs (announced July 1, 2026) seeking conversion of accelerated approvals to traditional approval, supported by ESSENCE confirmatory data and real-world evidence; PDUFA target action date Feb 28, 2027.
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Plain-English summary generated from this entry’s own fields (drug, condition, stage, date). Glossary · Open this catalyst’s page