Exploratory Assessment of Galectin-1,-3, and-9 in Non-Small Cell Lung Cancer

Simple Summary Galectins play a role in cancer angiogenesis, growth, and metastasis. Our pilot study aims to explore the role of galectins in non-small cell lung cancer (NSCLC) by assessing their correlation with treatment, metastasis, and survival. Galectin-1, -3, and -9 levels were measured in the sera of NSCLC patients using ELISA and analyzed by histology, previous treatment, metastasis, and overall survival (OS). Galectin-3 level was elevated in patients with adenocarcinoma compared to squamous cell carcinoma patients and lower in patients exposed to chemotherapy. Galectin-1 levels were significantly lower in patients with previous metastasis but did not correlate with future metastasis. Abnormal galectin-1 levels were significantly correlated with decreased OS; however, a loss of significance occurred when abnormal galectin-1 levels were examined in multivariable analysis. These preliminary findings may hold clinical importance, given the current development of galectin-3 inhibitors for NSCLC, and they underscore the potential of galectin-1 as a prognostic biomarker.Abstract Galectins play a pivotal role in lung cancer oncogenic pathways, influencing apoptosis, angiogenesis, and tumor metastasis. Biomarkers that diagnose, prognose, and guide cancer treatment are crucial, with galectins having the biomarker potential for non-small cell lung cancer (NSCLC). Using enzyme-linked immunosorbent assay (ELISA), we assessed serum galectin-1, -3, and -9 levels in NSCLC patients. A retrospective chart review was performed to examine patient demographics, cancer stage, tumor biology, cancer treatment, and patient outcomes. Galectin levels were then compared across these factors. In this exploratory analysis, galectin-3 levels were significantly lower in patients with squamous cell lung cancer (p = 0.0019) and in patients exposed to chemotherapy (p = 0.0375). Galectin-1 levels were significantly lower in patients with previous metastasis but had no correlation with future metastasis. Abnormal galectin-1 levels were significantly correlated with decreased overall survival (OS) in NSCLC (p = 0.0357) and specifically in patients with surgically resectable NSCLC (p = 0.0112). However, abnormal galectin-1 levels were not found to correlate with decreased OS in multivariable analysis (p = 0.0513). These findings may have clinical implications as galectin-3 inhibitors are in trials for NSCLC. Additionally, they suggest that galectin-1 has potential as a prognostic marker for surgically resectable NSCLC.