Scientists found new parts of the malaria parasite. These parts help the human body fight the sickness. This can help make a new vaccine.

科學家發現了瘧疾寄生蟲的新部位。這些部位能幫助人體對抗這種疾病，有助於研發新疫苗。

Malaria is hard to stop. Scientists looked at the parasite in the blood. They found 453 small pieces of the parasite. Some of these pieces are the same in many types of malaria.

瘧疾很難根除。科學家研究了血液中的寄生蟲，發現了 453 個寄生蟲的微小片段。其中某些片段在許多不同類型的瘧疾中都是相同的。

They tested these pieces on people and animals. The body's defense cells saw these pieces. The cells tried to kill the parasite.

他們在人類和動物身上測試了這些片段。人體的防禦細胞識別出這些片段，並嘗試殺死寄生蟲。

They tested two special pieces in mice. These pieces protected the mice from the sickness. This means the pieces work well.

他們在老鼠身上測試了兩個特殊的片段。這些片段能保護老鼠免於染病，這意味著這些片段效果良好。

Now scientists know which parts of the parasite to target. They can use this to make a vaccine for many types of malaria.

現在科學家知道了應該針對寄生蟲的哪些部位，可以用來研發一款針對多種瘧疾的疫苗。

Researchers have discovered a group of stable antigens in Plasmodium parasites that are recognized by human CD8+ T cells. This discovery could help scientists create a broad-spectrum vaccine that works against different types of malaria.

研究人員在瘧原蟲中發現了一組能被人類 CD8+ T 細胞識別的穩定抗原。這一發現可能有助於科學家開發一種能對抗不同類型瘧疾的廣譜疫苗。

In the past, creating effective malaria vaccines was difficult because there was a lack of proven T cell targets. To solve this problem, researchers analyzed infected red blood cells (reticulocytes) from Plasmodium vivax. This process identified 453 unique peptides from 166 proteins. Importantly, 75 of these were 'housekeeping proteins,' which means they are consistently present throughout the parasite's life cycle and are very similar across different malaria species.

過去開發有效的瘧疾疫苗十分困難，因為缺乏經證實的 T 細胞標靶。為了擬解決這個問題，研究人員分析了間日瘧原蟲（Plasmodium vivax）感染的紅血球（網織紅血球）。此過程從 166 種蛋白質中識別出 453 個獨特的肽段。重要的是，其中 75 個是「管家蛋白」，這意味著它們在原蟲的整個生命週期中持續存在，且在不同瘧疾物種之間非常相似。

These peptides were found in various types of human immune molecules (HLA alleles). The researchers then confirmed that these targets trigger an immune response in people infected with both P. vivax and P. falciparum. Furthermore, they observed T cell responses in the blood and liver of primates. In mouse models, two specific antigens provided protection, which suggests that these findings could be successfully applied to human vaccine development for multiple stages and species of the parasite.

這些肽段在各種人類免疫分子（HLA 等位基因）中被發現。研究人員隨後證實，這些標靶能觸發感染間日瘧原蟲與惡性瘧原蟲（P. falciparum）患者的免疫反應。此外，他們在靈長類動物的血液和肝臟中觀察到 T 細胞反應。在小鼠模型中，兩種特定抗原提供了保護，這表明這些發現可成功應用於人類疫苗的開發，以對抗原蟲的多個階段與物種。

The discovery of these shared antigens provides a proven scientific foundation for developing a malaria vaccine that targets several parasite species and developmental stages.

發現這些共享抗原，為開發一種能針對多個原蟲物種及發育階段的瘧疾疫苗提供了經證實的科學基礎。

Researchers have identified a series of evolutionarily conserved antigens in Plasmodium parasites that are recognized by human CD8+ T cells, potentially facilitating the creation of a broad-spectrum vaccine.

研究人員在瘧疾原蟲中發現了一系列演化上保守的抗原，這些抗原可被人類 CD8+ T 細胞識別，有望有助於開發廣譜疫苗。

The development of effective malaria vaccines has historically been impeded by a paucity of validated T cell epitope targets, with previous candidates often selected via indirect evidence. To address this deficit, an immunopeptidomic analysis was conducted on reticulocytes infected with Plasmodium vivax. This methodology identified 453 unique peptides corresponding to 166 proteins. Notably, 75 of these antigens were identified as housekeeping proteins, characterized by constitutive expression across multiple life cycle stages and high conservation across different Plasmodium species.

過去開發有效的瘧疾疫苗一直受到缺乏經過驗證的 T 細胞表位標靶所限制，之前的候選標靶通常是透過間接證據選出的。為了彌補這一缺陷，研究人員對感染了間日諸瘧原蟲（Plasmodium vivax）的網織紅細胞進行了免疫肽組學分析。此方法識別出 453 條對應 166 種蛋白質的獨特肽段。值得注意的是，其中 75 個抗原被識別為管家蛋白，其特徵是在多個生命週期階段具有組成型表達，且在不同瘧原蟲物種之間高度保守。

These peptides were observed to be presented by both classical (HLA-A, HLA-B, and HLA-C) and non-classical (HLA-E) alleles. The antigenicity of these epitopes was subsequently validated in cohorts of individuals infected with both P. vivax and P. falciparum. Furthermore, the induction of T cell responses was documented in the blood and liver of non-human primates following infection or immunization with attenuated parasites. In rodent models, two specific antigens were found to elicit protective CD8+ T cell-mediated immunity, suggesting a high degree of translational potential for cross-stage and cross-species applications.

研究觀察到這些肽段可由古典（HLA-A、HLA-B 和 HLA-C）及非古典（HLA-E）等位基因呈現。隨後，這些表位的抗原性在感染間日諸瘧原蟲和惡性瘧原蟲（P. falciparum）的受試群體中得到了驗證。此外，在非人類靈長類動物感染或使用減毒原蟲免疫後，記錄到其血液和肝臟中誘發了 T 細胞反應。在齧齒類動物模型中，發現兩種特定抗原可誘發保護性 CD8+ T 細胞介導的免疫反應，顯示出在跨階段和跨物種應用中具有高度的轉化潛力。

The discovery of these conserved antigens provides a validated molecular basis for the development of a malaria vaccine targeting multiple parasite species and developmental stages.

發現這些保守抗原，為開發針對多個原蟲物種和發育階段的瘧疾疫苗提供了經過驗證的分子基礎。