Cardiology and therapy · 2025
Safety and Efficacy of Tafamidis in Chinese Patients with Transthyretin Amyloid Cardiomyopathy.
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Tian Zhuang, Peng Daoquan, Ma Wei, Yan Jiangtao, Wang Jian'an, Tang Yida, Jin Wei, Liu Ying, Jia Caiping, Gao Yingxu, Gong Yankun, Sun Xiaohong, Chen Naihan, Zhu Shuiqing, Zhang Shuyang
Аннотация
INTRODUCTION: Tafamidis is approved in many countries for the treatment of patients with transthyretin amyloid cardiomyopathy (ATTR-CM). Approval is largely based on findings from an international phase 3 trial. This post-approval commitment study aimed to evaluate the safety and efficacy of tafamidis in patients with ATTR-CM in China.
METHODS: A multicenter, single-arm study in Chinese patients with symptomatic ATTR-CM in China. All patients received once-daily, open-label tafamidis free acid 61 mg for 12 months. Safety reporting was ongoing with efficacy assessments at months 6 and 12, including 6-min walk test distance, New York Heart Association (NYHA) functional classification, National Amyloidosis Centre staging, N-terminal pro-B-type natriuretic peptide and troponin I concentrations, Kansas City Cardiomyopathy Questionnaire Overall Summary score, 5-level EQ-5D index score, EQ visual analog scale, and 12-item Short Form Survey.
RESULTS: Patients (n = 53) were aged 60 (standard deviation [SD]: 12) years, 89% were male, and 94% had variant ATTR-CM (21% had A97S [p.A117S]). At baseline, most (81%) patients had NYHA class II symptoms (6% class I; 13% class III) and National Amyloidosis Centre stage I disease (74%; 21% stage II; 6% stage III). Median treatment exposure was 345 (range, 24‒418) days. Overall, 85% of patients reported treatment-emergent adverse events (TEAEs). The nature and incidence of TEAEs were consistent with the known safety profile of tafamidis. There were no serious or severe treatment-related TEAEs. At 6 and 12 months, there were minimal changes from baseline in all efficacy outcomes with tafamidis, and a high proportion of patients (≥ 44%) showed clinically relevant stability or improvement in each measure.
CONCLUSIONS: The safety of tafamidis in Chinese patients with ATTR-CM was consistent with that previously determined. Tafamidis treatment was associated with a stable disease profile over 12 months in a population of patients where most had variant ATTR-CM and mild heart failure symptoms.
TRIAL REGISTRATION: NCT04814186.
METHODS: A multicenter, single-arm study in Chinese patients with symptomatic ATTR-CM in China. All patients received once-daily, open-label tafamidis free acid 61 mg for 12 months. Safety reporting was ongoing with efficacy assessments at months 6 and 12, including 6-min walk test distance, New York Heart Association (NYHA) functional classification, National Amyloidosis Centre staging, N-terminal pro-B-type natriuretic peptide and troponin I concentrations, Kansas City Cardiomyopathy Questionnaire Overall Summary score, 5-level EQ-5D index score, EQ visual analog scale, and 12-item Short Form Survey.
RESULTS: Patients (n = 53) were aged 60 (standard deviation [SD]: 12) years, 89% were male, and 94% had variant ATTR-CM (21% had A97S [p.A117S]). At baseline, most (81%) patients had NYHA class II symptoms (6% class I; 13% class III) and National Amyloidosis Centre stage I disease (74%; 21% stage II; 6% stage III). Median treatment exposure was 345 (range, 24‒418) days. Overall, 85% of patients reported treatment-emergent adverse events (TEAEs). The nature and incidence of TEAEs were consistent with the known safety profile of tafamidis. There were no serious or severe treatment-related TEAEs. At 6 and 12 months, there were minimal changes from baseline in all efficacy outcomes with tafamidis, and a high proportion of patients (≥ 44%) showed clinically relevant stability or improvement in each measure.
CONCLUSIONS: The safety of tafamidis in Chinese patients with ATTR-CM was consistent with that previously determined. Tafamidis treatment was associated with a stable disease profile over 12 months in a population of patients where most had variant ATTR-CM and mild heart failure symptoms.
TRIAL REGISTRATION: NCT04814186.