| 2012 |
DSCAM physically interacts with UNC5C, and this interaction is stimulated by netrin-1 in primary cortical neurons and cerebellar granule cells. Knockdown of DSCAM or UNC5C, or dominant-negative mutants of either, suppresses netrin-1-induced growth cone collapse. Netrin-1 increases tyrosine phosphorylation of UNC5C and promotes complex formation of DSCAM with FAK, Fyn, and PAK1. Src family kinase inhibition reduces the DSCAM-UNC5C interaction and blocks growth cone collapse. |
Co-immunoprecipitation, shRNA knockdown, dominant-negative overexpression, tyrosine phosphorylation assays, growth cone collapse assay in primary neurons |
The Journal of biological chemistry |
High |
22685302
|
| 2017 |
TUBB3 (polymerized β-tubulin) directly interacts with UNC5C and partially co-localizes with it in the peripheral growth cone. Netrin-1 reduces this interaction and the co-localization. UNC5C interacts with polymerized TUBB3 in microtubules as shown by in vitro co-sedimentation, and netrin-1 decreases this interaction. Knockdown of TUBB3 or UNC5C blocks netrin-1-promoted axon repulsion in vitro and causes axon projection defects in vivo. Netrin-1 differentially increases MT dynamics in the distal versus proximal growth cone during repulsion, and this effect is abolished by knockdown of UNC5C or TUBB3. |
Co-immunoprecipitation, in vitro co-sedimentation assay, shRNA knockdown, live-cell imaging (EB3-GFP), in vivo axon projection analysis |
The Journal of neuroscience |
High |
28483977
|
| 2021 |
δ-secretase (AEP/legumain) cleaves UNC5C at N467 and N547 residues, enhancing its pro-apoptotic activity and caspase-3 activation. Netrin-1 deficiency activates δ-secretase, which truncates UNC5C. Blockade of δ-secretase cleavage of UNC5C diminishes the T835M mutant's pro-apoptotic activity. Viral expression of δ-secretase-truncated UNC5C fragments in APP/PS1 mice accelerates AD pathologies and impairs learning and memory. Deletion of UNC5C from netrin-1-depleted mice attenuates AD pathologies and rescues cognitive disorders. |
Site-directed mutagenesis (N467, N547), in vitro cleavage assay, caspase-3 activation assay, viral gene delivery in mouse models, behavioral testing |
Science advances |
High |
33863723
|
| 2022 |
AEP (asparagine endopeptidase) cleaves UNC5C in a Parkinson's disease context, producing intracellular fragments that facilitate dopaminergic neuronal loss. AEP-truncated UNC5C fragments promote α-synuclein aggregation and dopaminergic loss in α-SNCA transgenic mice. Netrin-1 deprivation induces AEP and caspase-3 activation, triggering UNC5C proteolytic fragmentation. Blocking UNC5C cleavage by AEP attenuates netrin-1 deprivation-elicited neuronal death and motor disorders. |
In vitro cleavage assay, viral overexpression of AEP-truncated UNC5C fragments, mouse behavioral assays, netrin-1 flox/flox mouse model |
Advanced science |
Medium |
35023303
|
| 2014 |
The T835M mutation in UNC5C increases neuronal cell death in HEK293T cells and rodent neurons, and increases susceptibility to Aβ, glutamate, and staurosporine-induced cell death. The mutation alters a conserved residue in the hinge region of UNC5C. |
In vitro cell death assay in HEK293T cells and primary rodent neurons, overexpression of wild-type and T835M UNC5C |
Nature medicine |
Medium |
25419706
|
| 2025 |
T835M knock-in (Unc5cKI/KI) mice develop hippocampal volume reduction, increased ventricular volume, dendritic disorganization, neuronal apoptosis (TUNEL+ and caspase 3/7 activation) by 12 months. Proteomic analysis revealed upregulation of oxidative stress pathways, increased JNK phosphorylation, and elevated NADPH oxidase. Crossing with AppNL-G-F/NL-G-F mice exacerbated these changes and increased Aβ42 levels, demonstrating that T835M increases neuronal susceptibility to amyloid pathology. |
Knock-in mouse model, TUNEL assay, caspase 3/7 assay, quantitative proteomics, immunohistochemistry, MRI volumetry, genetic crosses |
Molecular neurodegeneration |
High |
40468412
|
| 2007 |
Loss of UNC5C in mice with APC1638N mutations increases intestinal tumor progression and decreases tumor cell apoptosis, establishing UNC5C as a tumor suppressor in colorectal cancer. UNC5C expression is down-regulated in human colorectal cancers primarily through promoter methylation. |
Double-mutant mouse model (UNC5C/APC1638N), apoptosis measurement in intestinal tumors, promoter methylation analysis |
Gastroenterology |
High |
17967459
|
| 2011 |
The UNC5C A628K variant significantly reduces apoptosis compared with wild-type UNC5C as measured by active caspase-3 assay in transfected HEK293T cells, and segregates with colorectal cancer in families, supporting a role for UNC5C-mediated apoptosis in tumor suppression. |
Transfection of HEK293T cells with A628K mutant, active caspase-3 assay, family segregation analysis |
Gastroenterology |
Medium |
21893118
|
| 2006 |
Unc5c null mice on C57BL/6J background exhibit ventral/ipsilateral trochlear nerve misprojections and incomplete phrenic nerve innervation of the diaphragm, demonstrating that UNC5C is required for repulsive netrin-1 signaling in motor axon guidance in vivo. These phenotypes were not observed in mice lacking DCC, Neogenin1, or netrin1, placing UNC5C in a distinct signaling pathway. A major SJL-derived suppressor locus on Chromosome 17 modifies these phenotypes. |
Unc5c null mouse analysis, axonal tracing, genetic background experiments, genome-wide scan for modifier loci |
The Journal of neuroscience |
High |
16723533
|
| 2011 |
Unc5c deletion in mice disrupts long-range dorsal guidance of inferior olivary and pontine axons after crossing the midline, affects dorsal guidance of medial deep cerebellar and external cuneate axons, and causes degeneration of neurons in the external cuneate nucleus and inferior olivary nucleus. Transgenic expression of Unc5c in deep neurons and pontine neurons by the Atoh1 promoter rescues the medial deep cerebellar and pontine axon guidance defects, demonstrating cell-autonomous action. |
Unc5c null mouse, axonal tracing, transgenic rescue with Atoh1 promoter |
The Journal of neuroscience |
High |
21307253
|
| 2014 |
Unc5C expression is under direct negative transcriptional regulation by the transcription factor Ctip2, and Unc5C acts downstream of Ctip2 in controlling corticofugal axon projections. Netrin1-Unc5C interaction is involved in controlling interhemispheric projection in deep-layer callosal neurons. |
ChIP or transcription factor binding analysis, mouse genetic studies with Ctip2/Satb2 mutants, axon guidance assays |
Nature communications |
Medium |
24739528
|
| 2007 |
RHOX5 homeodomain protein transcriptionally represses Unc5c expression in Sertoli cells in vivo, requiring a Sertoli-cell-specific cofactor. The repression is mediated through a RHOX5-responsive element in the Unc5c 5'-UTR at the transcriptional level. RHOX2, RHOX3, and human RHOXF2/PEPP2 also repress Unc5c expression, indicating conserved regulation. Unc5c mutant mice have decreased germ cell apoptosis in the testis. |
Transfection analysis in cell lines, deletion analysis of 5'-UTR, in vivo testis expression analysis, Unc5c mutant mouse apoptosis analysis |
The Journal of biological chemistry |
Medium |
18077458
|
| 2007 |
UNC5C is required for the dorsal migration of spinal accessory motor neuron (SACMN) cell bodies away from the ventral midline. In Unc5C null mice, many SACMN cell bodies fail to migrate away from the ventral midline and cluster inappropriately in the ventrolateral spinal cord. UNC5A null mice show no such phenotype. |
Unc5C and Unc5A null mouse analysis, SACMN cell body position analysis in embryos |
Molecular and cellular neurosciences |
Medium |
17543537
|
| 2025 |
TRIM9, a brain-enriched E3 ubiquitin ligase, physically interacts with and co-localizes with UNC5C at the growth cone. TRIM9 is required for netrin-1-dependent changes in surface levels of UNC5C in the growth cone. Deletion of Trim9 impairs repulsive axon turning in a netrin gradient (which is UNC5C-dependent), and TRIM9 negatively regulates FAK activity in the absence of netrin-1. |
Co-immunoprecipitation, co-localization imaging, Trim9 knockout mouse neurons, microfluidic netrin-1 gradient, pH-mScarlet-UNC5C surface level imaging, shRNA knockdown of UNC5C |
Journal of neurochemistry |
High |
39871643
|
| 2024 |
TRIM9 interacts with UNC5C and regulates its mobility in the plasma membrane in the absence of netrin-1. Minutes after netrin-1 addition, UNC5C surface levels drop in a TRIM9-independent fashion. Repulsive turning in a netrin gradient is blocked by UNC5C knockdown. |
pH-mScarlet-UNC5C surface imaging, TRIM9 knockout, shRNA knockdown, microfluidic netrin-1 gradient |
bioRxivpreprint |
Medium |
38765979
|
| 2019 |
UNC5C directly interacts with integrin α6 in breast cancer cells. UNC5C knockdown enhances phosphorylation of FAK and SRC and increases MMP3, MMP7, MMP9, MMP10 expression via PI3K/AKT, ERK and p38 MAPK pathways. UNC5C knockdown potentiates netrin-1/integrin α6/β4 signaling and inhibits integrin-linked kinase phosphorylation at Thr-173. |
Co-immunoprecipitation (UNC5C-integrin α6), shRNA knockdown, overexpression in breast cancer cells, Western blot for signaling pathway components |
International journal of oncology |
Medium |
31789389
|
| 2019 |
Unc5c is necessary and sufficient to guide retinal ganglion cell axons to the opposite retina (retino-retinal projection). Netrin1, an Unc5c ligand, is expressed in the ventral diencephalon in a pattern consistent with impeding the growth of Unc5c-positive retinal axons into the brain. |
Unc5c null mouse analysis, axonal tracing, in situ hybridization for Netrin1, comparative species analysis |
Current biology |
Medium |
30905607
|
| 2013 |
Unc5c is selectively expressed by dopamine neurons of the VTA from adolescence onwards. Unc5c haploinsufficiency leads to increased tyrosine hydroxylase expression in medial prefrontal cortex (but not nucleus accumbens) and diminished amphetamine-induced locomotion, a phenotype identical to dcc haploinsufficiency and observed only after adolescence. |
In situ hybridization, immunofluorescence, Western blot in unc5c heterozygous mice, behavioral testing (amphetamine-induced locomotion) |
The European journal of neuroscience |
Medium |
23738838
|
| 2024 |
Dopamine axons reach the prefrontal cortex guided by a transient gradient of Netrin-1-expressing cells, and UNC5C is expressed on dopamine axons during adolescence. Disrupting the Netrin-1 gradient reroutes dopamine axons away from their target. The timings of dopamine axon growth and UNC5C expression are phase-locked, including in a seasonal model where mesocortical dopamine development is regulated by daylength in a sexually dimorphic manner. |
Rodent in vivo axon tracing, Netrin-1 gradient disruption experiments, immunofluorescence, seasonal model (Siberian hamsters) |
eLife |
Medium |
39056276
|
| 2022 |
UNC5C is expressed by a fraction of undifferentiated spermatogonia, and loss of Unc5c leads to accumulation of transit-amplifying progenitors, increased quiescent undifferentiated progenitors, and decline in spermatocyte I, without altering cell death rates. Netrin-1 repulses both undifferentiated and differentiating spermatogonia in vitro, suggesting UNC5C mediates adhesion/migration control in spermatogonial differentiation. |
Unc5crcm mutant mouse analysis, immunofluorescence, in vitro repulsion assay with Netrin-1 |
Stem cell research |
Medium |
35247845
|
| 2026 |
The ZU5 domain of UNC5C binds Schisandrin A with equimolar stoichiometry driven by enthalpy change, with van der Waals forces and hydrogen bonds as main forces. Leu61 and Leu96 of ZU5 are key binding residues. Binding induces loop fluctuations and a random coil-to-α-helix transformation in ZU5. |
Phage display peptide library screening, fluorescence spectroscopy, isothermal titration calorimetry, molecular dynamics simulation |
Bioorganic chemistry |
Medium |
41724002
|