Keywords: SNA، Sambucus nigra agglutinin; FucT, fucosyltransferase; FUT, fucosyltransferase gene; Lex, Lewis x; Ley, Lewis y; MAA, Maackia amurensis; PDAC, pancreatic ductal adenocarcinoma; SLex, sialyl-Lewis x; SLea, sialyl-Lewis a; SNA, Sambucus nigra agglutinin; ST, sialyltransferaseCytokines;