非洲啟動第二項HIV治療臨床試驗




ACTG啟動非洲第二項HIV治療臨床試驗

ACACIA研究評估在HIV治療開始時給予的兩種長效廣泛中和抗體

洛杉磯,2025年1月21日(GLOBE NEWSWIRE)——全球臨床試驗網絡ACTG(專注於HIV及其他傳染病)今日宣布啟動ACACIA研究(抗逆轉錄病毒與抗體結合治療HIV-1治療於非洲),亦稱為A5417。ACACIA是一項二期、雙盲、隨機研究,評估在四個非洲國家對HIV陽性成年人於抗逆轉錄病毒治療(ART)開始時給予的兩種長效廣泛中和抗體(bNAbs)3BNC117-LS和10-1074-LS的安全性及其病毒學和免疫學效果。

這項研究補充了ACTG的PAUSE研究,該研究評估在ART下病毒得到抑制的HIV陽性人群中使用的兩種相似的bNAbs,並於2024年6月招募了首位參與者。

ACACIA和PAUSE的參與者將進行分析性治療中斷(ATI)——這是一個密切監控的ART暫停期。ATI是HIV治療試驗的重要組成部分,因為它能幫助研究人員了解某種干預措施是否能在沒有ART的情況下控制HIV。雖然ART可以抑制病毒,但無法治癒HIV,且需要終身服用。即使在接受ART的情況下,HIV陽性者體內仍存在潛伏(或隱藏)的HIV儲存庫(包含HIV但不產生新複製的免疫細胞群)。當人們停止ART時,潛伏細胞中的病毒開始繁殖,從而增加體內HIV的數量。

ACTG主席喬瑟夫·Eron醫生表示:「我們很高興宣布在非洲啟動第二項HIV治療試驗,這是ACTG致力於在全球HIV陽性人群中進行HIV治療研究的一部分。這是非洲首次在ART開始時使用bNAbs的研究,我們期待在這一環境中獲得更多見解。」

ACACIA是一項多中心試驗,將招募135名年齡在18至60歲之間的HIV陽性參與者,這些參與者尚未接受HIV治療。所有參與者將開始接受基於整合酶抑制劑的ART方案。同時,他們將以2:1的比例隨機分配,接受一次靜脈注射的3BNC117-LS和一次靜脈注射的10-1074-LS,或這些bNAbs的安慰劑(在第一天給予)。由於這些bNAbs預計會在體內維持數月,當參與者的HIV-1 RNA低於200拷貝/ml且CD4+ T細胞計數≥450細胞/mm3時,他們將在15個月後停止ART並開始ATI,這時抗體在血液中的水平已降至非常低或不可檢測的水平。在ATI期間,參與者將被密切監控,持續24週。如果在此期間他們的病毒仍然被抑制,則可以在總共72週內不再服用ART。當他們符合重新開始ART的標準時,包括CD4計數連續兩次低於350拷貝/μL或病毒載量連續四週至少達到1000拷貝/mL等,參與者將重新開始ART。

ACACIA的共同主席瓦德扎奈·薩馬內卡醫生表示:「我們設計ACACIA研究,以確保參與者在病毒水平最高時接受bNAbs,從而優化其潛在的治療效益。研究設計還確保在開始ATI之前,bNAbs的水平非常低或已從血液中清除,以免bNAbs的抗病毒活性干擾我們檢測bNAbs持久免疫效應的能力。」

ACACIA在博茨瓦納、馬拉威、南非和津巴布韋的部分ACTG研究中心開展。該研究由美國國立衛生研究院(NIH)下屬的過敏與傳染病國家研究所(NIAID)資助,獲得的獎助金編號為UM1 AI068636、UM1 AI107716和UM1 AI068634。該研究還得到了比爾和梅琳達·蓋茨基金會的共同資助。bNAbs由Celldex Therapeutics製造,並由洛克菲勒大學提供。

ACACIA由美國軍事HIV研究計劃的特雷弗·克勞威爾醫生領導,薩馬內卡醫生(共同主席)和洛克菲勒大學及威爾康奈爾醫學院的瑪麗娜·卡斯基醫生、賓夕法尼亞大學的凱瑟琳·巴爾醫生(共同副主席)共同協調。ACTG由Eron醫生和麻省總醫院及哈佛醫學院的拉傑什·甘地醫生(ACTG副主席)領導。

對ACACIA的深入思考

這項研究的啟動無疑是HIV治療領域的一個重要里程碑,特別是在非洲這個疫情影響深遠的地區。ACACIA研究不僅是對bNAbs潛力的探索,更是對HIV治療新思路的嘗試。這種研究設計的創新之處在於,它不僅關注抗體的直接效應,還考慮了ART的中斷對HIV控制的影響,這對於未來的治療策略具有重要意義。

此外,這項研究的多中心特性和國際合作也表明,全球對於HIV治療的重視程度在不斷提升。隨著這些研究的深入,我們期待能夠找到更有效的治療方案,最終實現HIV的治癒。這不僅是科學的進步,也是對數以百萬計HIV陽性者生活質量的改善。希望未來能有更多類似的研究,為全球的HIV治療帶來新的希望。

以上文章由特價GPT API KEY所翻譯及撰寫。而圖片則由FLUX根據內容自動生成。

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Drone photo near Christ the Redeemer in Rio. Include a close-up of the tourist using {reference_image} as the face, standing at the viewpoint. He wears a casual t-shirt, shorts, and sneakers. Drone hovers slightly in front and above him, capturing both his face clearly and the giant statue towering behind. Edit this photo without changing her face 100% to reveal a young woman with an oval face and ideal body, not skinny.

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Her skin looks healthy and glowing.
She has light grey eyes with a cat-eye style, curly and defined eyelashes (wispy/manga lashes), and neat natural eyebrows.
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She wore a channel earcuff, gold watch and channel rings. She has coffin shape menicure in white gradien color.

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