SLC39A6 and neoplasm: Other studies using cultured cell lines found that overexpressing SLC39A9 causes increased migration of glioblastoma cells [37], and increased expression of SLC39A6 has been associated with increased intracellular levels of zinc and increased tumour invasiveness, while knocking down SLC39A6 reduces the proliferation of oesophageal squamous cell carcinoma cells [38].