CXCL1 and neoplasm: In vivo alterations of the tumor immune environment involved fewer protumorigenic tumor-associated macrophages (TAMs) and MDSCs due to the suppression of IL-4, IL-13, and CXCL1 expression, and elevated infiltration by antitumor CTLs and NK cells attracted by elevated CXCL9 and CXCL10 levels.