In a different study, the authors show that human malignant glioma-derived pericytes (HMGP), which co-expressed CD90, CD248, and PDGFR-β, are capable of inhibiting the proliferation of mitogen- and allogeneic-stimulated T cells via the release of prostaglandin E2 (PGE2), serum human leukocyte antigen G (sHLA-G), hepatocyte growth factor (HGF), and transforming growth factor-beta (TGF-β) (Figure 1, process ➄). This evidence concerns the gene HGF and malignant glioma.