Objective:To investigate the effect of long non-coding RNA (lncRNA) H19 regulating miRNA-675 (miR-675) and phosphatase and tensin homologue-deleted chromosome ten gene (PTEN) on the cell proliferation of glioma.Methods:Glioma cell lines U87-MG and U251 were chosen. The siRNA online design tool wad used to design small interfering RNA (siRNA) targeting H19. U87-MG and U251 cell lines with the stable knockdown of H19 were constructed (the stable knockdown of H19 group), and the cells randomly transfected with siRNA plasmid were taken as the control group, and normal cultured cells were treated as the blank group. Additionally, miR-675 and control microRNA were transfected into U87-MG and U251 with the stable knockdown of H19 (the overexpressing miR-675 group and the corresponding control group). Quantitative real-time polymerase chain reaction (qRT-PCR) was used to detect the relative expression levels of miR-675 and H19 in each group; the methyl thiazolyl tetrazolium (MTT) assay was used to detect the cell proliferation ability; the dual luciferase reporter gene assay was used to verify the targeting relationship between miR-675 and PTEN; Western blot was used to detect the relative expression level of PTEN protein.Results:The MTT assay results showed that the proliferation ability of U87-MG and U251 cells in the stable knockdown of H19 group was lower than that of the corresponding control group; and the differences in cell proliferation ability of all the groups after 48 h of culture were statistically significant (all P < 0.05). qRT-PCR detection results showed that the relative expression level of miR-675 in U251 cells in the stable knockdown of H19 group and the corresponding control group was 0.329±0.009 and 1.043±0.087, respectively, and the difference was statistically significant ( t = 14.15, P < 0.001); the relative expression level of miR-675 in U87-MG cells in the stable knockdown of H19 group and the corresponding control group was 0.299±0.009 and 1.027±0.106, respectively, and the difference was statistically significant ( t = 11.85, P < 0.001); the relative expression level of miR-675 in U87-MG and U251 cells in the stable knockdown of H19 group was lower than that of the corresponding control group. The dual luciferase reporter gene assay verified that miR-675 could bind to the 3'-UTR of PTEN. Western blot detection results showed that the relative expression level of PTEN protein in U87-MG and U251 cells in the stable knockdown of H19 group was higher than that of the corresponding control group and the blank group; in the U87-MG and U251 cells in the stable knockdown of H19 group, the relative expression level of PTEN in the overexpressing miR-675 group was lower than that of the corresponding blank group and the control group. In the U87-MG and U251 cells in the stable knockdown of H19 group, the cell proliferation ability of the overexpressing miR-675 group was higher than that of the corresponding blank group and the control group; the differences in cell proliferation ability of all the groups after 48 h of culture were statistically significant (all P < 0.05). Conclusions:lncRNA H19 may regulate the cell proliferation of glioma cells through the miR-675-PTEN signaling pathway.