Clic3-KO Mouse

CLIC3, chloride intracellular channel 3, belongs to the glutathione-S-transferase (GSTs) superfamily. It regulates fundamental cellular processes like chloride ion concentration regulation, cell membrane potential stabilization, and is involved in trans-epithelial transport, cell volume regulation, and apoptotic processes [4].

In cancer research, CLIC3 has been found to be significantly involved. In bladder cancer, it promotes cell proliferation by reducing p21 expression through interacting with NAT10 and inhibiting N4-acetylcytidine modification of p21 mRNA, indicating its potential as a therapeutic target [1]. In breast cancer, CLIC3 controls the recycling of MT1-MMP from late endosomes to sites of cell-matrix adhesion, and its knockdown opposes MT1-MMP-dependent invasive processes, predicting poor prognosis in ER-negative breast cancer [3]. In pancreatic ductal adenocarcinoma, CLIC3, collaborating with Rab25, promotes integrin recycling from late endosomes/lysosomes, and its expression predicts lymph node metastasis and poor prognosis [7]. In gastric cancer, CLIC3 functions as a Cl-channel in the plasma membrane, and decreased expression is associated with unfavorable prognosis [2]. In salivary gland mucoepidermoid carcinoma, CLIC3 promoter hypomethylation and overexpression are significant events [8].

In schizophrenia research, CLIC3 was identified as an immune-related hub gene, potentially a diagnostic biomarker and therapeutic target, as its levels were reduced in a schizophrenia rat model and reversed by an antipsychotic drug [5]. Also, in fibroblast cellular senescence, knockdown of CLIC3 mitigated various senescence-related phenotypes by interacting with ERK7 [6].

In conclusion, CLIC3 is involved in multiple biological processes and disease conditions. Its roles in cancer progression, including bladder, breast, pancreatic, gastric, and salivary gland cancers, are well-studied. In addition, it has potential implications in schizophrenia and fibroblast cellular senescence. Research on CLIC3 using gene-knockout or other loss-of-function models has provided valuable insights into its functions in these disease areas, helping to understand the underlying molecular mechanisms and potentially guiding new therapeutic strategies.