Long-term Safety of Eplontersen Treated aTTR Patients and in Liver Transplant and Severely Hepatic Impaired Subpopulations (sTTRing)
Post-Authorisation Safety Study: A Cohort Event Monitoring Study to Characterise the Use of Eplontersen in Patients With Prior Liver Transplant and Pre-existing Severe Hepatic Impairment and to Assess Long-term Safety Among All New Users of Eplontersen (sTTRing)
The aim of this observational cohort study is to characterise use of eplontersen in patients with prior liver transplant or with pre-existing severe hepatic impairment, as well as to assess long-term safety among all new users of eplontersen; all are areas of missing information
Primary objectives are:
- To describe demographic and clinical characteristics of patients at eplontersen initiation, including the prevalence of prior liver transplant (overall and by reason for liver transplant), and the prevalence of severe hepatic impairment; and to describe patients in these subgroups (prior liver transplant, severe hepatic impairment).
- To describe long-term safety in patients who initiate eplontersen treatment, including onset of new clinical events, abnormal laboratory values and serious adverse events.
調査の概要
状態
詳細な説明
Study D8450R00003 enrolls adults (≥18 years) with a confirmed ATTR diagnosis at the time of informed consent. The sTTRing study will represent a subset of D8450R00003 participants who consent to secondary research use of their data and who initiated eplontersen treatment within 1 year prior to enrollment in D8450R00003. For comparative analyses, patients not exposed to eplontersen who initiated alternative ATTR therapies during the D8450R00003 observation period will also be included.
sTTRing data collection will begin in Q3 2026 and conclude in Q1 2032. Interim analyses will be reported annually from Q3 2027 through Q3 2031, with a final report submitted in Q1 2033.
The primary endpoints supporting the primary study objective are: (1) the prevalence of patients with a history of liver transplantation, categorized by reason for liver transplant, and (2) the prevalence of severe hepatic impairment. Safety outcomes will be summarized by incidence risk and event rates across prespecified time intervals (e.g., 0-6 months and from 7 months to the end of available follow-up) and over the full duration of follow-up. These summaries will be included in interim reports as part of both primary and secondary objectives.
Cohort Event Monitoring will be used to identify safety events requiring further characterization. When more than 10 events are observed for a given outcome, cumulative hazard rates will be estimated. To optimize sample size, comparative analyses will be conducted, where feasible, at the final analysis and presented in the final report.
研究の種類
入学 (推定)
連絡先と場所
研究連絡先
- 名前：AstraZeneca Clinical Study Information Center
- 電話番号：1-877-240-9479
- メール：information.center@astrazeneca.com
参加基準
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
サンプリング方法
調査対象母集団
説明
Inclusion Criteria:
- D8450R00003 participants who consented to have their data used for future related research studies.
- D8450R00003 participants who initiated eplontersen treatment up to 1-year prior to enrolment into D8450R00003 study observation period, irrespective of ATTR phenotype or genotype. For the comparative analyses, patients unexposed to eplontersen treatment and who initiated another ATTR treatment during D8450R00003 study observation period will be included
Exclusion Criteria:
- Patients with exposure to eplontersen more than 1-year prior to enrolment into D8450R00003 study.
- Patients who participated in an interventional ATTR study in the 12-months prior to enrolment into D8450R00003 study.
研究計画
研究はどのように設計されていますか？
デザインの詳細
コホートと介入
グループ/コホート |
介入・治療 |
|---|---|
|
Eplontersen users
D8450R00003 population of new and prior eplontersen users (including prior liver transplant and severe hepatic impairment subpopulations)
|
Not applicable this is observational study no intervention is planned.
|
この研究は何を測定していますか？
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Demographic and clinical characteristics of eplontersen users, including the prevalence of prior liver transplant and severe hepatic impairment
時間枠：Quarter 2 2026- Quarter 1 2032
|
|
Quarter 2 2026- Quarter 1 2032
|
|
Long term safety with patients who initiated eplonersen treatment
時間枠：Quarter 2 2026- Quarter 1 2032
|
Onset of new clinical events, abnormal laboratory values, serious adverse events will be analysed as follows: a) Counts and frequency of first events and total number of events, incidence rate and incidence risk of events per time periods (e.g., 0-6, 7-end of follow-up available at time of reporting). b) Cohort event monitoring analysis including a. Incidence densities per 6 months (in the first year) or 12-months (after one year) intervals will be estimated. b. Differences in incidence densities per 6 or 12months intervals c. Nelson-Aalen estimator of cumulative hazard rate function over time. c) For SAEs, qualitative case reports of clinical course and patients' characteristics and comorbidities will be provided. These outcomes are all relative to primary objective 2 of study and are all relative to the same outcome measure. |
Quarter 2 2026- Quarter 1 2032
|
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Eplontersen treatment use
時間枠：Quarter 2 2026- Quarter 1 2032
|
To describe eplontersen treatment use, including duration of treatment and reasons for discontinuation (overall, in patients with prior liver transplant, in patients with pre-existing severe hepatic impairment).
These outcomes are all relative to secondary objective 1 of the study which is to describe "eplontersen treatment use".
|
Quarter 2 2026- Quarter 1 2032
|
|
Long-term safety in patients who initiate eplontersen treatment by subgroups
時間枠：Quarter 2 2026- Quarter 1 2032
|
Same as primary objective 2, separately in i) patients with prior liver transplant and ii) patients with pre-existing severe hepatic impairment.
These outcomes are relative to primary objective 2 of the study and to the same outcome measure, i.e. "long-term safety in patients who initiated eplontersen treatment".
This is a long-term safety study without a prespecified adverse event of interest; therefore, all safety events are in scope, as defined in the protocol: all serious adverse events identified; other adverse events, including any new diagnosis reported as a co-morbidity, new sign or symptom, or new abnormal laboratory value within 115 days of last eplontersen dose.
To support systematic and comprehensive listing of all AEs, clinical data in D8450R00003, in addition to serious adverse events, will be coded using MedDRA.
Clinical data that cannot be mapped to MedDRA will also be considered.
|
Quarter 2 2026- Quarter 1 2032
|
協力者と研究者
スポンサー
研究記録日
主要日程の研究
研究開始 (実際)
一次修了 (推定)
研究の完了 (推定)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
追加の関連 MeSH 用語
その他の研究ID番号
- D8450R00022
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
米国FDA規制機器製品の研究
米国で製造され、米国から輸出された製品。
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