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    Reversal of protein chemical aging by enzymatic deglycation

    Reversal of protein chemical aging by enzymatic deglycation

    Researchers froze the simplest amino acid to nearly minus 260°C and bombarded it with radiation that mimics cosmic rays — and it formed peptides, the building blocks of proteins, under conditions that exist before stars and planets are born

    Researchers froze the simplest amino acid to nearly minus 260°C and bombarded it with radiation that mimics cosmic rays — and it formed peptides, the building blocks of proteins, under conditions that exist before stars and planets are born

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    Is Gelatin Good for Gut Health? A Dietitian Explains

    Frishantic Launches Chelated Magnesium Glycinate for Nighttime Calm and Daily Muscle Ease

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    Newtrend Group Invests RMB20.5 Million in Equipment for New Glycine Base

    Reversal of protein chemical aging by enzymatic deglycation

    Reversal of protein chemical aging by enzymatic deglycation

    Researchers froze the simplest amino acid to nearly minus 260°C and bombarded it with radiation that mimics cosmic rays — and it formed peptides, the building blocks of proteins, under conditions that exist before stars and planets are born

    Researchers froze the simplest amino acid to nearly minus 260°C and bombarded it with radiation that mimics cosmic rays — and it formed peptides, the building blocks of proteins, under conditions that exist before stars and planets are born

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概念実証:ロザリンド・ラムジー=ゴールドマン医師と共に、NACを用いて全身性エリテマトーデスにおけるミトコンドリア機能不全を標的にする

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2025年11月27日
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概念実証:ロザリンド・ラムジー=ゴールドマン医師と共に、NACを用いて全身性エリテマトーデスにおけるミトコンドリア機能不全を標的にする
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N-アセチルシステイン(NAC)は、全身性エリテマトーデス(SLE)に対する新しい治療戦略として期待されていますが、これらの結果は現在進行中の多施設試験の二重盲検フェーズによって確認される必要があります。この試験の第一段階のデータは、ノースウェスタン大学ファインバーグ医学部リウマチ学のギャラガー研究教授であるロザリンド・ラムジー=ゴールドマン医師によって、2025年10月24日から29日にシカゴで開催されたアメリカリウマチ学会(ACR)で発表されました。

NACは、免疫抑制剤とは異なり、ループスの病因を引き起こす根本的な代謝欠陥を修正することを目指しており、免疫系を広く抑制するのではなく、細胞内のシステインとグルタチオン(GSH)レベルを回復させるように設計されています。これにより、ミトコンドリアの酸化ストレス、mTORの活性化、炎症系の偏り、抗核自己抗体の生成を減少させることが期待されています。この試験は、エンリッチメント登録の無作為撤回デザインを使用しており、すべての適格患者は無作為化の前に3か月間のオープンラベルのチトレーションフェーズ(2.4〜4.8 g/日)を完了します。

研究の最初の3か月間で、NACは68人の患者において全体的なSLE疾患活動性の統計的に有意な低下を示しました。SLEDAIの平均スコアは、ベースラインの8.73(SD、3.093)から3か月目の4.91(SD、2.92)に減少し(P = 1.1×10⁻¹²)、平均差は3.671(SD、3.201)でした。BILAGの総スコアはさらに大きな変化を示し、23.808(SD 5.099)から8.750(SD 6.027; P = 1.9×10⁻²²)に減少し、平均差は15.058(SD、8.424)でした。

重要なことに、NACは54人の参加者において、患者が報告した認知症状や疲労症状も改善しました。ADHD-不注意スコアは19.259(SD、2.960)から16.407(SD、7.449)に改善し、平均差は2.851(SD 6.645; P = 1.5×10⁻²)、ADHD-多動性は14.962(SD、7.530)から13.185(SD、7.809)に改善し、平均差は1.777(SD、4.063; P = 1.3×10⁻²)でした。身体的疲労は19.259(SD、2.960)から16.092(SD、3.972)に減少し、平均差は3.166(SD、3.318; P = 2.5×10⁻⁸)、精神的疲労は14.425(SD、4.574)から12.092(SD、4.814)に改善し、平均差は2.333(SD、3.518; P = 6.2×10⁻⁵)でした。

副作用には頭痛、吐き気、消化器症状、便秘、下痢が含まれ、いずれも一時的で可逆的でした。このフェーズでは18人の参加者が撤退しましたが、副作用に起因する撤退は1件のみでした。

HCPLiveとのインタビューで、ラムジー=ゴールドマン医師は、これらの初期のオープンラベル結果は励みになるものの、進行中の二重盲検フェーズがNACの疾患修飾の可能性を確認し、このミトコンドリア指向のアプローチがSLEにおける従来の免疫抑制に対するより安全な代替手段を提供できるかどうかを判断するために重要であると強調しました。「NACが行うことは、ミトコンドリアが適切に機能するために欠けていた化学物質を補充し、細胞が過剰な活動や炎症状態に向かわないようにし、抗体の生成を減少させることです」と述べました。

NAC N-acetyl cysteine

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