Browsing by Author "Guptill, Jeffrey T."

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    Randomized phase 2 study of ACE-083, a muscle-promoting agent, in facioscapulohumeral muscular dystrophy
    (Wiley, 2022) Statland, Jeffrey M.; Campbell, Craig; Desai, Urvi; Karam, Chafic; Díaz-Manera, Jordi; Guptill, Jeffrey T.; Korngut, Lawrence; Genge, Angela; Tawil, Rabi N.; Elman, Lauren; Joyce, Nanette C.; Wagner, Kathryn R.; Manousakis, Georgios; Amato, Anthony A.; Butterfield, Russell J.; Shieh, Perry B.; Wicklund, Matthew; Gamez, Josep; Bodkin, Cynthia; Pestronk, Alan; Weihl, Conrad C.; Vilchez-Padilla, Juan J.; Johnson, Nicholas E.; Mathews, Katherine D.; Miller, Barry; Leneus, Ashley; Fowler, Marcie; van de Rijn, Marc; Attie, Kenneth M.; Neurology, School of Medicine
    Introduction/aims: Facioscapulohumeral muscular dystrophy (FSHD) is a slowly progressive muscular dystrophy without approved therapies. In this study we evaluated whether locally acting ACE-083 could safely increase muscle volume and improve functional outcomes in adults with FSHD. Methods: Participants were at least 18 years old and had FSHD1/FSHD2. Part 1 was open label, ascending dose, assessing safety and tolerability (primary objective). Part 2 was randomized, double-blind for 6 months, evaluating ACE-083240 mg/muscle vs placebo injected bilaterally every 3 weeks in the biceps brachii (BB) or tibialis anterior (TA) muscles, followed by 6 months of open label. Magnetic resonance imaging measures included total muscle volume (TMV; primary objective), fat fraction (FF), and contractile muscle volume (CMV). Functional measures included 6-minute walk test, 10-meter walk/run, and 4-stair climb (TA group), and performance of upper limb midlevel/elbow score (BB group). Strength, patient-reported outcomes (PROs), and safety were also evaluated. Results: Parts 1 and 2 enrolled 37 and 58 participants, respectively. Among 55 participants evaluable in Part 2, the least-squares mean (90% confidence interval, analysis of covariance) treatment difference for TMV was 16.4% (9.8%-23.0%) in the BB group (P < .0001) and 9.5% (3.2%-15.9%) in the TA group (P = .01). CMV increased significantly in the BB and TA groups and FF decreased in the TA group. There were no consistent improvements in functional or PRO measures in either group. The most common adverse events were mild or moderate injection-site reactions. Discussion: Significant increases in TMV with ACE-083 vs placebo did not result in consistent functional or PRO improvements with up to 12 months of treatment.
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    Validation of the triple timed up‐and‐go test in Lambert‐Eaton myasthenia
    (Wiley, 2019-09) Raja, Shruti M.; Sanders, Donald B.; Juel, Vern C.; Harati, Yadollah; Smith, A. Gordon; Pascuzzi, Robert; Richman, David P.; Wu, Angie; Aleš, Kathy L.; Jacobus, Laura R.; Jacobus, David P.; Guptill, Jeffrey T.; Neurology, School of Medicine
    Introduction There are no validated, practical, and quantitative measures of disease severity in Lambert‐Eaton myasthenia (LEM). Methods Data from the Effectiveness of 3,4‐Diaminopyridine in Lambert‐Eaton Myasthenic Syndrome (DAPPER) trial were analyzed to assess triple timed up‐and‐go (3TUG) reproducibility and relationships between 3TUG times and other measures of LEM severity. Results The coverage probability technique showed ≥0.90 probability for an acceptable 3TUG difference of ≤0.2, indicating that it is reproducible in LEM patients. The correlation between 3TUG times and lower extremity function scores was significant in subjects who continued and in those who were withdrawn from 3,4‐diaminopyridine free base. Worsening patient‐reported Weakness Self‐Assessment Scale and Investigator Assessment of Treatment Effect scores corresponded with prolongation of 3TUG times. Discussion The 3TUG is reproducible, demonstrates construct validity for assessment of lower extremity function in LEM patients, and correlates with changes in patient and physician assessments. These findings, along with prior reliability studies, indicate 3TUG is a valid measure of disease severity in LEM.