Based on synonyms in MeSH and EMTREE databases and assuming hyphenated terms will retrieve hyphenated terms as well as those with spaces.
Il-25
OR IL25 OR IL-17 OR IL17 OR CTLA8 OR CTLA-8
OR CX2 OR CX-2 OR ML1 OR ML-1 OR Cytotoxic-T-lymphocyte-Associated-Antigen-8 OR
IL-17A OR IL17A OR IL-17B OR IL17B OR IL-17C OR IL17c OR IL-17E OR IL17e OR IL-17F
OR IL17f OR Interleukin-17 OR Interleukin-25 OR Interleukin-17A OR Interleukin-17B
OR Interleukin-17C OR Interleukin-17E OR Interleukin-17F