急性感染症の早期治療後のHIV-1の免疫制御

E S Rosenberg¹, M Altfeld, S H Poon

¹Partners AIDS Research Center and Infectious Disease Division, Massachusetts General Hospital and Harvard Medical School, Boston 02114, USA.

Nature

|October 12, 2000

まとめ

急性HIV-1感染の治療中断は,免疫反応を高めました. 8人の被験者のうち5人は6ヶ月以上,治療から離れている間,ウイルス負荷を500コピー/ml未満に維持し,免疫療法の可能性を示した.

科学分野:

免疫学免疫学とは
ウイルス学ウイルス学ウイルス学
感染症感染症は感染症です.

背景:

ウイルス特異のTヘルパー細胞は,慢性ウイルス感染症の制御に不可欠です.
急性HIV-1治療はこれらの反応を高めますが,免疫制御への影響は不明です.

研究の目的:

急性HIV-1感染における監督された治療中断が免疫制御を強化できるかどうかを調査する.
治療終了後のウイルス特異免疫応答の増幅を評価する.

主な方法:

治療を受けた急性HIV-1感染の被験者8人は,治療中断を1回または2回実施した.
ウイルスの負荷が3週間にわたって5,000コピー/mlを超えた場合,または一度に50,000コピー/mlを超えた場合,治療を再開しました.
ウイルス特異の細胞毒性Tリンパ球とTヘルパー細胞の反応をモニターした.

主要な成果:

すべての被験者は,治療中断後,ウイルス負荷が5,000コピー/ml未満の一時的な安定状態を達成しました.
8人中5人の被験者は,治療終了後平均6.5ヶ月間,ウイルス負荷を500コピー/ml以下に維持しました.
ウイルスの特異性のある細胞毒性Tリンパ球の増加と持続的なTヘルパー細胞応答は,すべての参加者において観察されました.

結論:

HIV-1のような慢性ウイルス感染症では,機能的な免疫反応が強化されることがあります.
監督された治療中断により,一部の個体ではウイルスの制御が持続することがあります.
これらの発見は,HIV-1感染に対する免疫療法の可能性を裏付けています.

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