| 2004 |
LRRC8C (alias AD158) was identified as a member of the LRRC8 family of leucine-rich repeat proteins with predicted structure consisting of 16 extracellular LRRs and four transmembrane regions, implicated in proliferation and activation of lymphocytes and monocytes. |
Homology-based sequence analysis and predicted structural characterization |
FEBS letters |
Low |
15094057
|
| 2014 |
LRRC8D interacts with LRRC8A, LRRC8B, and LRRC8C, as determined by co-immunoprecipitation, supporting a model where LRRC8 proteins form heteromeric complexes that mediate solute transport. |
Co-immunoprecipitation |
The Journal of biological chemistry |
Medium |
24782309
|
| 2015 |
LRRC8C is a subunit of heteromeric volume-regulated anion channels (VRACs) but does not contribute to cisplatin/carboplatin uptake under isotonic or hypotonic conditions; loss of LRRC8C did not increase resistance to platinum-based drugs, in contrast to LRRC8A and LRRC8D. |
CRISPR/genetic knockout with drug uptake and cell viability assays |
The EMBO journal |
High |
26530471
|
| 2016 |
The C-terminal residues of the first extracellular loop (EL1) of LRRC8C, specifically equivalent residues to Lys-98 and Asp-100 in LRRC8A, are major determinants of VRAC inactivation kinetics and anion selectivity, as determined using LRRC8C/LRRC8E chimeras and point mutations. |
Chimeric channel construction, point mutagenesis, patch-clamp electrophysiology |
The Journal of biological chemistry |
High |
27325695
|
| 2016 |
Combinatory expression of LRRC8A with LRRC8D and LRRC8C is essential for VSOR (VRAC) activity in HeLa cells, as demonstrated by double, triple, and quadruple gene-silencing studies. |
RNA silencing (multiple gene combinations), electrophysiology |
Channels (Austin, Tex.) |
Medium |
27579940
|
| 2017 |
In primary rat astrocytes, LRRC8A/C/E-containing (and LRRC8D-containing) heteromeric VRACs preferentially conduct charged osmolytes (d-aspartate), while LRRC8A/D-containing VRACs dominate release of uncharged osmolytes (taurine, myo-inositol); LRRC8C+LRRC8E knockdown strongly reduced charged osmolyte efflux but not uncharged osmolyte release. |
RNAi knockdown combined with radiotracer efflux assays |
The Journal of physiology |
High |
28833202
|
| 2017 |
LRRC8A-LRRC8C heteromeric channels are directly inhibited by oxidation of intracellular cysteine residues (e.g., by chloramine-T or tert-butyl hydroperoxide), in contrast to LRRC8A-LRRC8E heteromers which are potentiated, demonstrating subunit-dependent oxidative modulation. |
Patch-clamp electrophysiology with oxidant treatment on heterologously expressed fluorescently tagged LRRC8 heteromers |
The Journal of physiology |
High |
28841766
|
| 2018 |
The intracellular loop (IL) of LRRC8A connecting TM2 and TM3 and the first extracellular loop (EL1) of LRRC8C are both essential for VRAC activity; replacing EL1 of LRRC8A with that of LRRC8C generates a functional homomeric VRAC with normal volume regulation, and LRRC8A IL sequences determine anion permeability, rectification, and voltage sensitivity. |
Chimeric channel construction, electrophysiology, cell volume regulation assays |
The Journal of general physiology |
High |
29853476
|
| 2018 |
MLC1 modulates VRAC currents indirectly in astrocytes; absence of MLC1 leads to changes in the phosphorylation state of the VRAC subunit LRRC8C, suggesting LRRC8C is subject to post-translational regulation via MLC1-dependent signal transduction pathways (ERK phosphorylation). |
Western blot (phosphorylation state), RNAi knockdown and overexpression of MLC1, electrophysiology |
Neurobiology of disease |
Medium |
30076890
|
| 2020 |
LRRC8A forms heteromeric complexes with LRRC8C and/or LRRC8E to transport 2'3'-cGAMP and other cyclic dinucleotides; LRRC8A/C channels mediate cGAMP import and export driven by the electrochemical gradient, and LRRC8D inhibits cGAMP transport. Sphingosine 1-phosphate activates and DCPIB inhibits channel-mediated cGAMP transport. |
Genetic knockout/knockdown screens, radiotracer and STING reporter assays for cGAMP transport, pharmacological manipulation |
Molecular cell |
High |
33171122
|
| 2020 |
LRRC8A homohexamers poorly recapitulate VRAC function; coexpression of LRRC8A and LRRC8C generates heteromeric channels with strong, voltage-independent DCPIB inhibition under normal intracellular ionic strength, more closely mimicking native VRAC pharmacology than LRRC8A alone. |
Electrophysiology in HCT116 Lrrc8c cells, pharmacological analysis with DCPIB, mutagenesis (R103F) |
American journal of physiology. Cell physiology |
High |
33356947
|
| 2021 |
LRRC8C co-immunoprecipitates with NADPH oxidase 1 (Nox1) in vascular smooth muscle cells; LRRC8C knockdown inhibits TNFα-induced superoxide production, receptor endocytosis, NF-κB activation, and proliferation, positioning LRRC8A/C channels as key supporters of Nox1 activity. |
siRNA knockdown, co-immunoprecipitation, functional assays (O2·- production, NF-κB, proliferation) |
The Journal of physiology |
High |
33932953
|
| 2021 |
LRRC8A/C channels are resistant to oxidant-mediated inhibition compared to LRRC8A/D channels; the extracellular loop domains (EL1, EL2) of LRRC8C confer oxidant resistance, as substitution of 8D extracellular loops into 8C conferred stronger chloramine-T-dependent inhibition. |
Chimeric channel construction, patch-clamp electrophysiology with oxidant treatment |
The Journal of physiology |
High |
33932953
|
| 2022 |
LRRC8C is a critical component of VRAC in T cells; its deletion abolishes VRAC currents and regulatory volume decrease (RVD). LRRC8C mediates transport of 2'3'-cGAMP in T cells, leading to STING and p53 activation, which inhibits T cell proliferation, survival, and cytokine production. |
Genetic KO (Lrrc8c-/- mice), electrophysiology, volume regulation assays, radiotracer cGAMP transport, STING/p53 pathway analysis, in vivo immune challenge models |
Nature immunology |
High |
35105987
|
| 2022 |
Cryo-EM structure of murine LRRC8A/C heteromeric channels reveals hexameric assembly with a predominant A:C ratio of 2:1 (four LRRC8A and two LRRC8C subunits). LRRC8A subunits cluster in pairs stabilizing a closed state, while LRRC8C subunits show larger flexibility and destabilize tightly packed LRRC8A subunits to enhance channel activation. |
Cryo-electron microscopy structure determination |
Nature structural & molecular biology |
High |
36522427
|
| 2022 |
Oxidation of the start methionine of LRRC8C, with additional contribution from the LRR domain, mediates inhibition of LRRC8A-LRRC8C heteromeric channels by oxidants, as identified by chimeric and concatemeric channel analysis. |
Chimeric/concatemeric channel construction, mutagenesis, patch-clamp electrophysiology with oxidant treatment |
The Journal of physiology |
High |
35861288
|
| 2022 |
In kidney, LRRC8C is exclusively localized to vascular endothelium (not nephron epithelia), as determined by immunolocalization in mice expressing epitope-tagged LRRC8 subunits. |
Immunolocalization using epitope-tagged knock-in mice |
Journal of the American Society of Nephrology : JASN |
Medium |
35777784
|
| 2024 |
HSV-1 protein UL56 targets LRRC8A and LRRC8C for degradation (at least partially via proteasomal turnover), thereby inhibiting cGAMP uptake via VRAC channels and reducing intercellular cGAMP-mediated innate immune signaling. |
Viral infection assays, proteasome inhibition, protein degradation quantification, cGAMP transport functional assays |
Cell reports |
Medium |
38652659
|
| 2024 |
cGAMP produced by tumor cGAS is transported via LRRC8C channels into endothelial cells, where it activates STING signaling to enhance lymphocyte recruitment and transendothelial migration, contributing to vascular normalization in liver cancer. |
Preclinical liver cancer models with cGAS/STING-deficient mice, in vivo functional studies |
Nature communications |
Medium |
38177099
|
| 2024 |
De novo gain-of-function variants in LRRC8C at the pore/cytoplasmic domain boundary cause constitutive channel activation (activity even at isotonic conditions) due to increased structural flexibility of the mutant proteins, resulting in a dominant multisystem human disorder affecting blood vessels, brain, eyes, and bones. |
Cryo-EM structural analysis of mutant proteins, electrophysiology of co-expressed LRRC8A + mutant LRRC8C |
The EMBO journal |
High |
39623139
|
| 2025 |
In endothelial cells, LRRC8C forms heteromeric complexes with LRRC8A and LRRC8B (not LRRC8D); LRRC8C depletion reduces endothelial VRAC currents, inhibits AKT-eNOS phosphorylation, increases myogenic tone, impairs eNOS-dependent vasodilation, and exacerbates angiotensin-induced hypertension in vivo. |
Co-immunoprecipitation with epitope-tagged knock-in mice, siRNA knockdown in HUVECs, electrophysiology, pressure myography, in vivo hypertension model |
Hypertension (Dallas, Tex. : 1979) |
High |
41636028
|
| 2025 |
Zafirlukast and pranlukast inhibit LRRC8A/C heteromeric channels by binding to the N-terminal domain and inter-subunit fenestrae between TM1 and TM2; mutations in NTD, TM1, and TM2 alter sensitivity to both drugs, and inhibition involves destabilization of pore-lipid interactions promoting channel inactivation. |
Molecular dynamics simulation, mutagenesis, patch-clamp electrophysiology with chimeric homomeric 8C-8A(IL125) and heteromeric 8A/8C channels |
Communications biology |
High |
41053296
|
| 2025 |
In brain astrocytes, LRRC8A and LRRC8C are key components of glutamate-permeable VRACs; LRRC8C knockdown reduces swelling-activated glutamate (D-aspartate) release by ~56%; knockdown of LRRC8A or LRRC8C reciprocally reduces the protein stability of the partner subunit without affecting mRNA levels, indicating mutual post-translational stabilization. |
RNAi knockdown in primary astrocytes, radiotracer efflux assays, Western blot for protein stability, qRT-PCR |
American journal of physiology. Cell physiology |
High |
41740631
|