| 2015 |
AMIGO2 directly binds the pleckstrin homology (PH) domain of PDK1 via amino acid residues 465–474 in AMIGO2, acting as a membrane scaffold that recruits PDK1 to the plasma membrane and promotes Akt activation. Loss of AMIGO2 in endothelial cells leads to apoptosis and inhibition of angiogenesis with Akt inactivation. A synthetic peptide containing AMIGO2 residues 465–474 abrogated the AMIGO2–PDK1 interaction, Akt activation, and pathological angiogenesis in vivo. |
Co-immunoprecipitation, direct binding assay with synthetic peptides, loss-of-function in endothelial cells, in vivo tumor/retinopathy angiogenesis models |
The Journal of cell biology |
High |
26553931
|
| 2017 |
AMIGO2 interacts with the pseudokinase PTK7, and AMIGO2 regulates PTK7 proteolytic processing. BET bromodomain proteins BRD2/4 occupy a melanoma-specific promoter and super-enhancer at the AMIGO2 locus; BET inhibitor treatment evicts BRD2/4, silences AMIGO2, and alters PTK7 processing. AMIGO2 silencing in melanoma cells induces G1/S cell-cycle arrest followed by apoptosis. |
Co-immunoprecipitation (AMIGO2–PTK7 interaction), epigenomic profiling (ChIP-seq for BRD2/4), CRISPR genome editing of regulatory elements, BETi treatment, loss-of-function RNA silencing with cell-cycle/apoptosis readouts |
Molecular cell |
High |
29149598
|
| 2004 |
DEGA/AMIGO2 is a type I transmembrane protein that localizes to the cell surface (confirmed by DEGA-GFP fusion construct in 293 cells). Stable antisense-mediated knockdown in gastric adenocarcinoma AGS cells caused altered morphology, increased ploidy, chromosomal instability, decreased cell adhesion and migration, and near-complete abrogation of tumorigenicity in nude mice. |
GFP fusion localization, stable antisense transfection, nude mouse xenograft, cell adhesion/migration assays, chromosomal analysis |
Oncogene |
Medium |
15107827
|
| 2017 |
AMIGO2 expression in tumor cells mediates their preferential adhesion to liver endothelial cells (but not lung endothelial cells), promoting liver metastasis. siRNA-mediated knockdown reduced liver endothelial cell adhesion in vitro, and forced expression of AMIGO2 in low-AMIGO2 cells increased liver endothelial cell adhesion and liver metastasis in vivo. |
siRNA knockdown, forced expression, ex vivo imaging, intrasplenic injection metastasis model |
Scientific reports |
High |
28272394
|
| 2019 |
AMIGO2 functions as a homophilic cell-surface protein in the retina; starburst amacrine cells (SACs) and rod bipolar cells (RBCs) express AMIGO2, and Amigo2 knockout mice display expanded SAC and RBC dendrite arbors while other retinal neuron arbors remain unchanged. Increased SAC dendrite coverage was accompanied by increased direction selectivity of downstream direction-selective ganglion cells (DSGCs), identifying AMIGO2 as a cell-type-specific dendritic scaling factor. |
Amigo2 knockout mouse, morphological analysis of dendrite arbors, electrophysiology of DSGCs, immunostaining |
Cell reports |
High |
31693896
|
| 2017 |
AMIGO2 modulates T-cell functions: Amigo2 knockout impairs T-cell infiltration into secondary lymphoid organs and dampens Th-cell activation, while promoting splenic Th-cell proliferation. Mechanistically, AMIGO2 overexpression in 293T cells dampens NF-κB transcriptional activity, and AMIGO2 deficiency enhances Akt but suppresses GSK-3β phosphorylation and promotes nuclear translocation of NF-κB and NFAT1 in Th cells. Amigo2 KO mice exhibit ameliorated experimental autoimmune encephalomyelitis (EAE). |
Amigo2 knockout mice, adoptive T-cell transfer, NF-κB reporter assay, Western blot for Akt/GSK-3β phosphorylation, nuclear fractionation for NF-κB/NFAT1 |
Brain, behavior, and immunity |
Medium |
28119027
|
| 2016 |
IL-17A and TNF-α synergistically upregulate AMIGO2 expression in RA synoviocytes via an ERK-dependent mechanism (JNK inhibits AMIGO2 induction). Elevated AMIGO2 promotes cell survival and reduces apoptosis (cadmium-induced toxicity). HMGB1 in inflammatory conditions further increases AMIGO2 expression and reduces cell toxicity. |
Cytokine stimulation of synoviocytes, ERK/JNK pharmacological inhibition, apoptosis assay with cadmium, co-culture experiments |
Frontiers in immunology |
Medium |
27446084
|
| 2022 |
AMIGO2 contained in cancer cell-derived extracellular vesicles (EVs) is internalized by human hepatic sinusoidal endothelial cells (HHSECs) and, once inside, significantly enhances adhesion of HHSECs to cancer cells (including cells that themselves lack AMIGO2 expression), identifying a paracrine mechanism for liver metastasis initiation. |
Western blot of EVs, EV internalization assay, cell adhesion assay with AMIGO2-overexpressing vs. control EVs |
Scientific reports |
Medium |
35039535
|
| 2024 |
METTL3-mediated m6A methylation in the 5'-UTR of AMIGO2 mRNA recruits the reader YTHDC2, stabilizing/upregulating AMIGO2 expression in RA fibroblast-like synoviocytes. METTL3 knockdown reduces m6A on AMIGO2 5'-UTR, decreases YTHDC2–AMIGO2 mRNA interaction, and lowers AMIGO2 protein, suppressing RA-FLS proliferation and migration; AMIGO2 overexpression rescues these phenotypes. |
m6A-seq/MeRIP for modification site mapping, RIP (YTHDC2–AMIGO2 mRNA), siRNA knockdown of METTL3/YTHDC2, rescue overexpression of AMIGO2 |
Biochimica et biophysica acta. Molecular basis of disease |
Medium |
38432455
|
| 2024 |
In esophageal squamous cell carcinoma, METTL3-mediated m6A modification in the 5'-UTR of AMIGO2 pre-mRNA is read by YTHDC1, which regulates AMIGO2 splicing. METTL3 knockdown reduces m6A on AMIGO2 pre-mRNA, impairs YTHDC1-mediated splicing, and decreases AMIGO2 expression, suppressing ESCC proliferation and migration; AMIGO2 overexpression rescues these effects. |
MeRIP (m6A site mapping), RIP (YTHDC1–AMIGO2 pre-mRNA), splicing analysis, siRNA knockdown/rescue overexpression, in vitro and in vivo tumor models |
Gene |
Medium |
38360124
|
| 2018 |
AMIGO2 deficiency in mice (KO) causes increased cardiomyocyte apoptosis, reduced proliferation, and reduced angiogenesis after myocardial infarction, with weaker cardiac function and larger infarct scar. Molecularly, AMIGO2 KO increases active caspase-3 and decreases PDK1, p-Akt, Bcl-2/Bax, and VEGF expression, consistent with inactivation of the PDK1/Akt survival pathway in cardiomyocytes. |
AMIGO2 KO mouse MI model, echocardiography, TUNEL/Ki67/immunohistochemistry, Western blot for PDK1/Akt/Bcl-2/Bax/VEGF |
Cardiology journal |
Medium |
29718531
|
| 2023 |
AMIGO2 suppresses innate cisplatin sensitivity in NSCLC by inhibiting cisplatin-induced activation of caspase-8, caspase-9, and caspase-3, thereby preventing GSDME cleavage and pyroptosis. AMIGO2 acts by stimulating the PDK1/Akt (T308) signaling axis. Alteration of AMIGO2 expression changed cisplatin-induced pyroptosis both in vitro and in vivo. |
AMIGO2 knockdown/overexpression, caspase activity assays, GSDME cleavage Western blot, PDK1/Akt phosphorylation assays, in vivo xenograft cisplatin treatment |
Journal of cellular and molecular medicine |
Medium |
37438979
|
| 2022 |
AMIGO2 expression in human gastric and colorectal cancer cells is directly associated with their adhesion to human hepatic sinusoidal endothelial cells (HHSECs) in vitro. Constitutive AMIGO2 knockdown clones showed significantly attenuated adhesion to HHSECs and suppressed liver metastasis in nude mice following intrasplenic inoculation, validating the mouse findings in human cancer cells. |
AMIGO2 knockdown (constitutive clones), cell adhesion assay to HHSECs, intrasplenic injection nude mouse liver metastasis model |
Pathology, research and practice |
Medium |
35843033
|
| 2024 |
AMIGO2 promotes EMT in colorectal cancer cells via activation of the TGFβ/Smad signaling pathway. Treatment with TGFβ receptor inhibitor LY2109761 suppressed AMIGO2-induced EMT. In CRC tissue samples, AMIGO2 was found at the invasive front where it localizes to the nucleus and associates with EMT marker expression, suggesting nuclear translocation of AMIGO2 as a mechanism for inducing EMT. |
AMIGO2 overexpression/knockdown, TGFβ/Smad pathway inhibitor treatment, immunohistochemistry/nuclear localization analysis in CRC clinical samples, EMT marker Western blot |
Cancer gene therapy |
Medium |
39379686
|
| 2025 |
AMIGO2-containing small extracellular vesicles (sEVs) from gastric cancer cells activate hepatic stellate cells (HSCs) via NF-κB nuclear translocation, inducing IL-8 secretion. The resulting IL-8-rich conditioned medium significantly enhances gastric cancer cell migration; neutralizing IL-8 with antibodies suppresses this migration, establishing an AMIGO2 sEV→HSC→IL-8→cancer cell migration axis in liver metastasis. |
sEV isolation, AMIGO2 overexpression, NF-κB nuclear translocation assay, chemokine array, IL-8 neutralizing antibody, migration assay |
Anticancer research |
Medium |
40155010
|
| 2022 |
AMIGO2 expression in cancer-associated fibroblasts (CAFs) of colorectal cancer is induced by TGF-β. Conditioned media from NAFs with AMIGO2 overexpression enhanced CRC tumor cell proliferation and migration; siRNA-mediated inhibition of AMIGO2 in CAFs attenuated these effects, showing AMIGO2 regulates paracrine tumorigenic secretomes in CAFs. |
TGF-β stimulation, AMIGO2 overexpression in NAFs, siRNA knockdown in CAFs, conditioned media transfer, proliferation/migration assays |
The Journal of pathology |
Medium |
39523830
|
| 2024 |
AMIGO2 knockdown in bladder cancer cells suppresses PPAR-γ expression; PPAR-γ overexpression rescues the proliferation and migration suppressed by AMIGO2 knockdown, placing PPAR-γ downstream of AMIGO2 in a signaling axis controlling bladder cancer cell growth. |
siRNA/lentiviral AMIGO2 knockdown, RNA-seq, PPAR-γ Western blot, PPAR-γ rescue overexpression, cell proliferation/migration/xenograft assays |
Hereditas |
Low |
38978149
|
| 2021 |
AMIGO2 knockdown via CRISPR/Cas9 in high-grade serous ovarian cancer cells reduces sphere-forming potential, adhesion, and invasion in vitro, and significantly attenuates intraperitoneal metastasis in vivo. |
CRISPR/Cas9 knockdown, sphere formation assay, cell adhesion/invasion assay, in vivo IP metastasis model |
Cancer letters |
Medium |
33524500
|
| 2022 |
Adhesion molecule Amigo2 is selectively expressed in medial habenula neurons and mediates fasciculation of the fasciculus retroflexus. Amigo2 loss-of-function in mice causes defasciculation of medial habenular axons; gain-of-function generates a more condensed tract and rescues the KO phenotype. AMIGO2 does not alter the course of habenular fibers, only their fasciculation. |
Amigo2 KO mouse, gain-of-function overexpression rescue experiment, tract tracing/morphological analysis |
Developmental dynamics |
Medium |
35727300
|