GEOapplication/xmlftp://ftp.ncbi.nlm.nih.gov/geo/series/GSE284nnn/GSE284668/primaryOK200TranscriptomicsMus musculusExpression profiling by high throughput sequencinghttps://www.ncbi.nlm.nih.gov/geo/query/acc.cgi?acc=GSE284668GEOGSEfalseS100A4 inhibition alters pre-metastatic niche formation in 4T1 lung metastasis modelCancer metastasis poses a major clinical challenge and is responsible for ~90% of cancer-associated deaths. However, progress in treating metastatic disease is limited. S100A4/FSP1 has long been associated with cancer metastasis, including breast cancer. In this study, we report preclinical efficacy data of a novel S100A4 blocking antibody that suppresses breast cancer metastasis. 4T1 and MMTV-PyMT breast cancer metastasis to the lung is greatly attenuated by S100A4 blocking antibody treatment. Immunohistochemistry analysis shows that neutrophil infiltration is significantly reduced in the anti-S100A4 treated mice. Single-cell RNA sequence analysis of the premetastatic niche treated with either isotype control or anti-S100A4 antibody from the 4T1 model show that NK and T cell activation in the lung. In this study, we report that S100A4 promotes premetastatic niche formation by promoting neutrophil infiltration and suppressing the function of cytotoxic NK and T cells.2026/05/15GSE284668GSM8690315GSM869031628457284668Mus musculus[41962622]