Figure 1.

Search strategy for retrieving publications on MSC immunomodulation. The search formula was set as follows: TS = “Mesenchymal Stem Cell*” OR “Bone Marrow Stromal Cell*” OR “Mesenchymal Stromal Cell*” OR “Mesenchymal Progenitor Cell*” OR “Wharton* Jelly Cell*” OR “Bone Marrow Stromal Stem Cell*” AND TS = (“Immunotherap*” OR “immune therap*” OR “immunomodulation*” OR “immunoregulator*” OR “immunomodulator*” OR “immune suppression*” OR “Immunosuppression*”). The publication date was from 1 January 2000, to 7 March 2022. The 6,655 studies were identified from the Web of Science Core Collection (WoSCC), and 54 non-English studies were excluded. The search strategy identified 4,227 studies and excluded 2347 non-articles.