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Updated: Jan 20, 2026

Author Spotlight: A Model to Study the Systemic and Local Dynamics of CD8+ T Cells During LN Metastasis
Published on: January 26, 2024
Apolipoprotein E is a predictive marker for assessing non-small cell lung cancer patients with lymph node metastasis
Hyo Jung An1, Hyun Min Koh1, Dae Hyun Song2
1Department of Pathology, Gyeongsang National University Changwon Hospital, Changwon, South Korea.
Background:
Apolipoprotein E (APOE) modulates lipid homeostasis in the systemic circulation and induces inflammatory immune responses in the tumor microenvironment. We evaluated APOE expression in order to assess tumor progression in non-small cell lung cancer (NSCLC).
Methods:
Immunohistochemical staining for APOE was performed on tissue microarray blocks from 148 patients who had undergone surgery for NSCLC. The staining intensity and the proportion of APOE-positive tumor cells (based on distinct membranous and cytoplasmic staining) were scored. The relationships between APOE expression and clinical (age, sex, and smoking history) and pathological (TNM stage and histological type) factors were evaluated.
Results:
Positive APOE staining was observed in 93 (64.6%) patients. APOE expression patterns differed among NSCLC histological types (p-value = 0.016). Negative APOE expression was significantly associated with lymph node metastasis in NSCLC (p-value = 0.040). Both cases of N2 (stage IIIA) disease showed negative APOE expression.
Conclusions:
APOE is a useful marker for assessing NSCLC patients with lymph node metastasis.
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