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Kyverna Presents Registrational Trial Primary Analysis for Miv-cel in Stiff Person Syndrome Demonstrating Statistically Significant, Durable Clinical Benefit Across All Endpoints in an Oral, Late-Breaker Session at AAN Annual Meeting

$KYTXPress releaseApr 21, 2026, 6:45 PM ETRead the release

Kyverna reported positive primary analysis from its registrational KYSA-8 trial of miv-cel in stiff person syndrome, demonstrating statistically significant improvements across all primary and secondary endpoints. A single dose of miv-cel achieved a median 46% improvement in walking speed at 16 weeks (p=0.0003), with all 26 patients discontinuing chronic immunotherapies.

Key figures

Drug Name
miv-cel (mivocabtagene autoleucel, KYV-101)
Phase Of Trial
Phase 2
Patients dosed
26
Primary endpoint p value
0.0003
T25fw median improvement percent
46
Patients discontinued immunotherapy
26

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