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中华临床医师杂志(电子版) ›› 2026, Vol. 20 ›› Issue (03) : 174 -180. doi: 10.3877/cma.j.issn.1674-0785.2026.03.002

临床研究

不同克隆号抗体对胃癌Claudin 18.2免疫组织化学检测及靶向用药筛选的影响
付小霞, 段瑞敏, 何乐, 靳英()   
  1. 034000 山西忻州,山西医科大学附属忻州医院 忻州市人民医院病理科
  • 收稿日期:2026-04-01 出版日期:2026-03-30
  • 通信作者: 靳英
  • 基金资助:
    山西省卫生健康委科研课题(2024240); 忻州市科技计划项目(20240701)

Impact of antibody clone selection on Claudin 18.2 immunohistochemical detection and targeted drug screening in gastric carcinoma

Xiaoxia Fu, Ruimin Duan, Le He, Ying Jin()   

  1. Department of Pathology, Xinzhou Hospital Affiliated to Shanxi Medical University, Xinzhou People's Hospital, Xinzhou 034000, China
  • Received:2026-04-01 Published:2026-03-30
  • Corresponding author: Ying Jin
引用本文:

付小霞, 段瑞敏, 何乐, 靳英. 不同克隆号抗体对胃癌Claudin 18.2免疫组织化学检测及靶向用药筛选的影响[J/OL]. 中华临床医师杂志(电子版), 2026, 20(03): 174-180.

Xiaoxia Fu, Ruimin Duan, Le He, Ying Jin. Impact of antibody clone selection on Claudin 18.2 immunohistochemical detection and targeted drug screening in gastric carcinoma[J/OL]. Chinese Journal of Clinicians(Electronic Edition), 2026, 20(03): 174-180.

目的

探讨胃腺癌组织中Claudin 18.2(CLDN18.2)的表达特征,比较4种不同克隆号抗体(43-14A、OTIR157B5、MXR038、RM510)在Ventana BenchMark平台免疫组织化学检测结果的一致性。

方法

收集山西医科大学附属忻州医院病理科2022~2025年确诊的胃腺癌标本159例(手术标本49例、活检标本110例),在Ventana BenchMark平台检测CLDN18.2表达,以中~强阳性腺癌细胞比例≥75%为截断值,评价同一检测平台下4种抗体检测结果的一致性。

结果

4种CLDN18.2抗体在胃腺癌阳性率分别为43-14A:40.2%(64/159)、OTIR157B5:40.2%(64/159)、MXR038:9.4%(15/159)、RM510:6.9%(11/159),组间差异有统计学意义(P<0.05)。其中克隆号OTIR157B5与43-14A在总体、手术及活检标本中差异均无统计学意义(均P>0.05),与Ventana平台适配性良好;克隆号MXR038、RM510在各组标本中与43-14A相比,差异均有统计学意义(均P<0.001),与平台适配性欠佳。以43-14A为参照,OTIR157B5敏感度为89.1%、特异度为92.6%,二者在总体、手术及活检标本中一致性均良好(κ>0.70)。

结论

43-14A 与 OTIR157B5 抗体在 Ventana BenchMark全自动免疫组织化学平台检测胃腺癌 CLDN18.2表达结果可靠、一致性佳。

Objective

To investigate the expression characteristics of Claudin 18.2 (CLDN18.2) in gastric adenocarcinoma tissues, and to compare the consistency of immunohistochemical detection results among four antibodies with different clone numbers (43-14A, OTIR157B5, MXR038, and RM510) on the Ventana BenchMark platform.

Methods

A total of 159 gastric adenocarcinoma specimens (49 surgical specimens and 110 biopsy specimens) diagnosed in the Department of Pathology, Xinzhou Hospital Affiliated to Shanxi Medical University from 2022 to 2025 were collected. CLDN18.2 expression was detected on the Ventana BenchMark platform. The positive cutoff value was defined as the proportion of moderately to strongly positive adenocarcinoma cells ≥75%. The consistency of detection results among the four antibodies on the same platform was evaluated.

Results

The positive rates of the four CLDN18.2 antibodies in gastric adenocarcinoma were as follows: 40.2% (64/159) for 43-14A, 40.2% (64/159) for OTIR157B5, 9.4% (15/159) for MXR038, and 6.9% (11/159) for RM510, with statistically significant differences among the groups (P<0.05). There were no statistically significant differences between clone OTIR157B5 and 43-14A in overall, surgical, and biopsy specimens (all P>0.05), indicating good compatibility with the Ventana platform. In contrast, clones MXR038 and RM510 showed statistically significant differences compared with 43-14A across all specimen groups (all P<0.001), indicating poor platform compatibility. Using 43-14A as the reference, the sensitivity and specificity of OTIR157B5 were 89.1% and 92.6%, respectively, and the two antibodies showed good consistency in overall, surgical, and biopsy specimens (κ>0.70).

Conclusion

The detection results of CLDN18.2 expression in gastric adenocarcinoma using the 43-14A and OTIR157B5 antibodies on the Ventana BenchMark automated immunohistochemical platform are reliable and demonstrate high consistency.

图1 4种克隆号CLDN18.2抗体在胃腺癌手术标本中的表达情况(OptiView HRP Multimer法:200倍放大)。图a为43-14A染色强度3+,阳性肿瘤细胞占比100%;图b为OTIR157B5染色强度3+,阳性肿瘤细胞占比100%;图c为MXR038染色强度2+,阳性肿瘤细胞占比50%;图d为RM510染色强度1+,阳性肿瘤细胞占比10%
图2 4种克隆号CLDN18.2抗体在胃腺癌活检标本中的表达情况(OptiView HRP multimer法:400倍放大)。图a为43-14A染色强度3+,阳性肿瘤细胞占比100%;图b为OTIR157B5染色强度3+,阳性肿瘤细胞占比100%;图c为MXR038染色强度2+,阳性肿瘤细胞占比95%;图d为RM510染色强度2+,阳性肿瘤细胞占比95%
表1 159例胃腺癌标本4种CLDN18.2抗体克隆号的表达[例(%)]
表2 49例胃腺癌根治标本4种CLDN18.2克隆号的表达[例(%)]
表3 110例胃腺癌内镜活检标本4种CLDN18.2克隆号的表达[例(%)]
图3 CLDN18.2 4种克隆号抗体在不同胃腺癌标本的一致性分析。图a为CLDN18.2在胃腺癌手术标本与胃腺癌总标本一致性分析;图b为CLDN18.2在胃腺癌活检标本与胃腺癌总标本一致性分析
表4 OTIR157B5、MXR038和RM510在胃腺癌不同标本的敏感度和特异度(%)
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