欧洲裔女性KIR多态性与早期流产的分子及内分泌差异
这项前瞻性队列研究纳入23名欧洲裔、年龄<43岁、BMI正常、在单次整倍体胚胎移植后发生特发性早期流产（<12孕周）的女性，按KIR单倍型及激活基因KIR2DS1/KIR3DS1存在与否分组，分析子宫内膜转录组及uNK细胞与滋养层球状体的共培养。结果显示，缺乏KIR2DS1和KIR3DS1者黄体期孕酮更高（P=0.0059, P=0.0151）；抑制性KIR谱下调细胞信号传导、上调免疫反应；激活型KIR的uNK细胞因子产生更高（P≤0.0482），IL-12p40更低（P=0.0492）；ROS与孕酮正相关（P<0.05）。结论提示KIR多态性影响内膜基因表达、孕酮、细胞因子及氧化应激，FGF-4、TGF-β1和卵泡抑素为候选介质，但限于单一族群需扩大验证。
要点
- 缺乏KIR2DS1和KIR3DS1的早期流产女性黄体期孕酮浓度更高。
- 抑制性KIR谱下调细胞信号传导并上调免疫反应相关基因表达。
- 激活型KIR的uNK细胞分泌更多细胞因子但IL-12p40更低。
核心结论
- KIR多态性影响不明原因早期流产女性子宫内膜基因表达、孕酮浓度、细胞因子分泌及氧化应激。
- FGF-4、TGF-β1和卵泡抑素被识别为早期母胎对话的候选介质。
- 研究限于单一族群，需更大队列验证结果。
研究设计与样本
- 前瞻性队列研究，纳入23名欧洲裔、年龄<43岁、BMI 19-25 kg/m²的女性。
- 研究对象为单次整倍体胚胎移植后发生特发性早期流产（<12孕周）者。
- 按KIR单倍型及激活基因KIR2DS1和KIR3DS1存在与否分组。
- 采集子宫内膜活检进行转录组分析，并建立患者来源原代uNK细胞与滋养层来源JEG-3球状体的共培养。
主要发现
- 缺乏KIR2DS1和KIR3DS1基因的参与者黄体期孕酮浓度更高（P=0.0059, P=0.0151）。
- 抑制性KIR谱患者细胞信号传导和分子转导下调，免疫反应上调。
- 激活型KIR谱的uNK细胞产生更高水平的细胞因子（AgRP、IFN-γ、IL-8、IL-17A、IP-10、TNF-β；P≤0.0482），IL-12p40产生更低（P=0.0492）。
- 细胞内活性氧产生与孕酮浓度正相关（P<0.05），尤其在KIR3DS1阴性参与者中。
- 细胞因子分泌、孕酮浓度和ROS之间存在进一步相关性，涉及FGF-4、TGF-β1和卵泡抑素等关键分子。
临床怎么用
- 对于不明原因早期流产女性，可考虑评估KIR基因型以了解内膜免疫内分泌状态。
- KIR2DS1/KIR3DS1缺失者黄体期孕酮较高，监测孕酮水平可能有助于个体化管理。
- FGF-4、TGF-β1和卵泡抑素作为候选介质，未来可能成为干预靶点，但目前尚不推荐临床常规检测。
局限性
- 研究仅纳入欧洲裔女性，结果外推至其他族群需谨慎。
- 样本量较小（23例），需更大队列验证。
- 研究为观察性设计，无法确立因果关系。
以上解读依据论文摘要（全文未开放获取或许可不允许翻译转载）。
原文
RESEARCH QUESTION: Do certain killer-cell immunoglobulin-like receptor (KIR) polymorphisms of uterine natural killer (uNK) cells contribute to early pregnancy losses, and if so, how? DESIGN: This prospective, cohort study included 23 European ancestry women under 43 years old with a normal body mass index (19-25 kg/m²) who experienced idiopathic early pregnancy loss (<12 gestational weeks) after a single euploid embryo transfer following intracytoplasmic sperm injection/preimplantation genetic testing for aneuploidies between June 2022 and December 2024. Participants were categorized based on KIR haplotypes and the presence or absence of the activating genes KIR2DS1 and KIR3DS1. Endometrial biopsies were collected and used for transcriptomic analysis and to establish co-cultures of patient-derived primary uNK cells with trophoblast-derived JEG-3 spheroids. RESULTS: Participants lacking the KIR2DS1 and KIR3DS1 genes exhibited higher luteal progesterone concentrations (P = 0.0059, P = 0.0151). Transcriptomic analysis revealed that patients with inhibitory KIR profiles showed a down-regulation of cell signalling and molecular transduction coupled with an upregulation of immune response. Functional assays demonstrated that uNK cells derived from individuals with activator KIR profiles exhibited higher cytokine production (AgRP, IFN-γ, IL-8, IL-17A, IP-10, TNF-β; P ≤ 0.0482), with a lower production of IL-12p40 (P = 0.0492), than in patients carrying the inhibitory KIR haplotype. Additionally, intracellular reactive oxygen species production positively correlated with progesterone concentrations (P < 0.05), especially in KIR3DS1- participants. Further correlations were observed between cytokine secretion, progesterone concentrations and ROS, with key molecules like FGF-4, TGF-β1 and follistatin. CONCLUSIONS: KIR polymorphisms influence endometrial gene expression, progesterone concentrations, cytokine secretion and oxidative stress in women with unexplained early miscarriage in the current cohort, highlighting FGF-4, TGF-β1 and follistatin as candidate mediators of early maternal-fetal cross-talk. However, as this study is limited to a single patient ethnicity, larger cohorts are necessary to validate the results.
引用
- Cuadrado-Torroglosa I, Palomar A, Quiñonero A, et al. Molecular and endocrine differences in early miscarriage associated with KIR polymorphisms in European ancestry women. Reprod Biomed Online. 2026. PMID: 41980565. doi:10.1016/j.rbmo.2026.105532
供执业医师工作参考，不替代临床判断；数值与分级以指南原文为准。