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功能性治愈艾滋病研究取得進展

文章來源:廣州生物醫藥與健康研究院   發布時間:2019-05-10  【字號:     】  

  艾滋病(AIDS)嚴重威脅全球公共衛生,目前全世界約有3690萬人已感染HIV,且每年增加約180萬感染者。現有的抗病毒藥物治療(ART)可有效控制但不能根除體內的病毒,終生服藥給患者帶來了沉重的負擔,因此亟需研制出能長期有效甚至完全控制病毒(功能性治愈)的新方法。近日,中國科學院廣州生物醫藥與健康研究院聯合來自廣州醫科大學廣州第八人民醫院、中山大學及英國倫敦國王學院的研究人員在該領域取得新進展,相關研究成果以Arsenic trioxide impacts viral latency and delays viral rebound after termination of ART in chronically SIV infected macaques 為題發表于國際學術期刊Advanced Science

  潛伏感染的艾滋病毒儲存庫是目前仍無法根治HIV感染的關鍵因素。研究者認為先設法激活潛伏的病毒儲存庫,再通過藥物或免疫系統殺傷活化的病毒可能是根治艾滋感染的有效策略,因此尋找能特異激活病毒儲存庫并給予殺滅的方法是目前艾滋病治療領域的熱點。通過一系列體外細胞實驗,研究人員發現三氧化二砷(As2O3,砒霜的主要成分)可特異激活及干擾潛伏的病毒儲存庫,并且不會引起過度的免疫炎癥反應。最重要的是,研究人員發現慢性SIV感染艾滋獼猴在接受了三氧化二砷聯合ART治療后可有效抑制病毒載量。艾滋獼猴在停藥后病毒反彈的時間顯著延緩,甚至部分獼猴停藥后長期未出現病毒反彈。此外,還發現該療法可有效降低感染獼猴體內的病毒儲存庫數量,并增強了病毒特異性的細胞免疫應答。

  值得一提的是,砒霜或含砷制劑在傳統中藥被用于抗感染及寄生蟲疾病。在現代醫學,注射用三氧化二砷制劑已獲得中國和美國FDA批準用于治療急性早幼粒細胞白血病(APL)等癌癥并有著良好的有效性和安全性。該研究結果提示在艾滋病毒感染者現有ART化療的基礎上聯合使用三氧化二砷制劑有可能獲得長期控制病毒的效果,研究團隊將于近期開展臨床治療新方案的探索及招募艾滋感染志愿者。

  該研究有可能提升現有抗艾滋病治療的效果,對減少抗病毒藥物的使用及長期服藥的毒副作用以及降低經濟負擔等具有重要意義。

  廣州生物院特聘研究員陳凌、研究員孫彩軍(現為中山大學深圳公共衛生學院教授)以及King's College London的教授Thomas Lehner為該論文的共同通訊作者。該項研究得到國家重大科技專項、廣州市健康醫療協同創新專項的資助。

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