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個人化 mRNA 癌症疫苗真的來了嗎?Moderna × Merck 黑色素瘤疫苗 Phase 3 達標,腫瘤復發率顯著下降

一句話結論: 個人化 mRNA 癌症疫苗首次在大型第三期臨床試驗中證明能阻止腫瘤復發,是癌症治療從「治療已發病」走向「預防復發」的里程碑時刻。
CNN 報導 Moderna mRNA 疫苗與 Keytruda 併用試驗成功

2026 年 8 月 19 日,生技產業迎來歷史性一刻:Moderna 與 Merck 宣布,兩家公司合作的個人化 mRNA 黑色素瘤疫苗(與免疫療法 Keytruda 併用)在大型第三期臨床試驗中達成主要療效終點,術後輔助治療顯著延緩高風險黑色素瘤患者的癌症復發。這是 mRNA 技術在 COVID 疫苗之後,首次在大型晚期試驗中證明自己能治療癌症——消息一出,Moderna 股價盤中一度暴漲逾九成,Merck 同步走揚約 7%。

Kobeissi Letter:Moderna 股價因 Phase 3 成功暴漲逾 110%

這款疫苗如何「個人化」?

傳統疫苗預防的是外來病原,而這款癌症疫苗「教」免疫系統攻擊的是患者自己的腫瘤。製程分三步:首先,手術切除腫瘤後,科學家定序腫瘤組織的基因組,找出癌細胞特有的突變;接著,用 AI 演算法從數千個突變中篩選出最可能引發免疫反應的「新抗原」(neoantigen);最後,為每位患者量身合成一段 mRNA,注射後讓體內細胞短暫製造這些新抗原,訓練 T 細胞精準辨識並攻擊殘餘的癌細胞。

這正是它與 Keytruda 互補的原因:疫苗負責「教會」免疫系統認得敵人,Keytruda(免疫檢查點抑制劑)則負責「解除」癌細胞壓制免疫系統的煞車,兩者協同作戰,讓攻擊力與解除抑制同步到位。

為什麼第三期成功如此關鍵?

癌症疫苗的概念已發展數十年,但個人化 mRNA 路線長期卡在「如何在大型隨機試驗中證明有效」。過去的小型試驗與一期、二期數據雖然亮眼,樣本數不足始終讓市場半信半疑。這次第三期試驗在「高風險黑色素瘤患者」這群復發率極高的族群中達到主要療效終點,等於為整個 mRNA 腫瘤免疫平台拿到了最有力的背書——華爾街日報形容這是「首個成功的晚期 mRNA 研究,驗證了數十年來個人化治療研究的價值」。

Eric Topol:mRNA 疫苗也在胰臟癌、三陰性乳癌與肺癌露出曙光

知名心臟科醫師、Scripps Research 執行副總裁 Eric Topol 在 X 上指出,這次黑色素瘤的成功「是建立在個人化 mRNA 新抗原疫苗在胰臟癌、三陰性乳癌與非小細胞肺癌的初步成功訊號之上」。換句話說,黑色素瘤只是第一個被驗證的適應症,背後的平台技術有望擴散到多種實體腫瘤。

對 Moderna 意味著什麼?

Moderna 在 COVID 疫苗需求退潮後,股價長期低迷,公司亟需下一個成長引擎。這次 Phase 3 成功驗證了 mRNA 平台在腫瘤領域的價值:個人化疫苗的商業模式(每位患者獨一無二)意味著高單價與高毛利,而與 Merck 的合作分擔了開發成本與風險。市場的反應也說明了這一點——不只是 Moderna 暴漲,整個癌症疫苗賽道都跟著重新估值。

華爾街日報:Moderna 與 Merck 疫苗成功預防黑色素瘤復發

何時上市?價格會是多少?

目前這款疫苗尚未提交上市申請。依照第三期成功後的流程,Moderna 與 Merck 接下來會完成數據分析、與監管機構討論,最快可能在未來一到兩年內申請核准。個人化製程是價格的主要變數:每位患者的疫苗都要重新設計與生產,成本遠高於量產型疫苗,業界普遍預估單一療程價格可能落在數萬美元等級——但相較於晚期癌症的治療費用與生命損失,若有保險或給付機制介入,仍有其價值基礎。

常見問題 (FAQ)

Q1:mRNA 癌症疫苗和 COVID 疫苗是同一種技術嗎?安全性如何?

是同一套 mRNA 平台技術,但作用對象不同:COVID 疫苗讓身體製造病毒棘蛋白來產生抗體,癌症疫苗則讓身體製造腫瘤新抗原來訓練 T 細胞。mRNA 疫苗的安全性已在數十億劑 COVID 疫苗中獲得大規模驗證,且癌症疫苗不含活病毒,不會致癌。

Q2:這款疫苗對哪些癌症有效?

目前唯一在第三期驗證成功的是高風險黑色素瘤(皮膚癌中最致命的一種)。同一平台正在胰臟癌、三陰性乳癌、非小細胞肺癌等適應症進行試驗,但都還在早期階段。

Q3:個人化疫苗要等多久才能打?

從手術取得腫瘤組織到疫苗製成,目前製程約需數週。這意味著它主要用於「手術後預防復發」的輔助治療情境,而不是給已擴散的晚期患者急救。

Q4:誰適合這款疫苗?

目前試驗對象是高復發風險的黑色素瘤患者(腫瘤已侵犯淋巴結或轉移風險高者)。一般健康人不適合也不需要施打——它的目標是「已經得過癌症、怕復發」的人。

Q5:價格會很貴嗎?會不會有健保或保險給付?

個人化製造成本高,預估單一療程落在數萬美元等級。實際上市定價、各國藥價談判與保險給付條件,都要等核准與商業化政策公布後才能確定。

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