| 2019 |
Myeloid cell-derived FXa promotes tumor immune evasion by signaling through protease-activated receptor 2 (PAR2), reprogramming tumor-associated macrophages; monocytes and macrophages were identified as crucial extravascular sources of FX in the tumor microenvironment. |
Conditional knockout mice lacking myeloid cell FX production; pharmacological inhibition with rivaroxaban; mechanistic signaling studies in tumor models |
Science immunology |
High |
31541031
|
| 2013 |
FX binding to Ad5 hexon protein protects adenovirus from neutralization by natural IgM and the classical complement pathway, enabling liver transduction; FX was not required for liver transduction in mice lacking antibodies, C1q, or C4. |
In vitro serum neutralization assays with FX-blocking; in vivo liver transduction in antibody-deficient, C1q-deficient, and C4-deficient mice |
Nature medicine |
High |
23524342
|
| 2012 |
The HAdv-FX complex activates a distinct NF-κB-dependent innate immune gene network downstream of TLR4/MyD88/TRIF/TRAF6 signaling; misplacement of FX from blood into intracellular macrophage compartments upon virus entry triggers this innate immune response. |
Structure-guided mutagenesis to ablate HAdv-FX complex formation; in vivo genome-wide transcriptional profiling comparing wild-type vs. FX-binding-ablated virus |
Science (New York, N.Y.) |
High |
23019612
|
| 2010 |
Ad5 binds FX via the hexon protein; the Ad5:FX complex targets heparan sulfate proteoglycans (HSPGs) on cell surfaces, with O-linked sulfate groups critical for binding; integrin αv engagement is required for efficient post-attachment internalization. |
Enzymatic removal of HS side chains; competition with sulfated heparins; in vivo liver accumulation assays; Ad5 vectors with CAR- and αv-integrin binding mutations |
PLoS pathogens |
High |
20949078
|
| 2024 |
FXa promotes androgen-independent prostate tumor growth by activating PAR2 and phosphorylation of ERK1/2 in tumor cells; immunosuppressive PMN-MDSCs are a key extrahepatic source of FX in the prostate TME; CD84 ligation on PMN-MDSCs enhances F10 expression. |
scRNA-seq; genetic and pharmacological inhibition of FXa; ERK1/2 phosphorylation assays; CD84 ligation experiments in mouse CRPC models |
Cancer cell |
High |
39303726
|
| 1997 |
Arginine-specific cysteine proteinases (gingipain-Rs) from Porphyromonas gingivalis directly activate human factor X in a dose- and time-dependent manner with Km below normal plasma FX concentration; the 95-kDa form is 5-fold more efficient than the 50-kDa form and is potentiated by phospholipids. |
In vitro enzyme kinetics assays; clotting time assays in factor-deficient plasmas; reconstitution with purified FX |
The Journal of biological chemistry |
High |
9188512
|
| 1998 |
X-bp from Deinagkistrodon acutus venom is a heterodimeric C-type lectin-like protein that binds the Gla domain of factor X (residues 1-44); the C-terminal region of the Gla domain peptide is critical for correct folding and binding; X-bp binds two Ca2+ ions per molecule. |
Protein isolation; complete amino acid sequencing; solid-phase binding inhibition assays with Gla domain peptide fragments; Ca2+ binding measurements; 3D model construction |
Biochemistry |
Medium |
9860851
|
| 2001 |
FXa acts as a mitogen for human mesangial cells via proteolytic activity, inducing calcium mobilization, JNK activation, tyrosine kinase signaling, and PDGF A/B chain upregulation through a protease-activated receptor (not EPR-1); PKC activation is partially involved. |
DNA synthesis assays; serine protease inhibitor (leupeptin); neutralizing anti-PDGF antibody; tyrosine kinase inhibitors (genistein, herbimycin A); PKC downregulation; RT-PCR for EPR-1 |
Journal of the American Society of Nephrology : JASN |
Medium |
11316847
|
| 2017 |
The Gla domain of FX mediates PS-specific membrane binding; molecular dynamics simulations identified PS-specific binding sites in FX-GLA and showed convergent membrane-bound configuration across 14 independent simulations. |
Molecular dynamics simulations using highly mobile membrane mimetic (HMMM); conventional membrane simulations |
Journal of thrombosis and haemostasis : JTH |
Low |
28782177
|
| 2021 |
Factor X binds exactly one PS molecule per Gla domain when PE is present in excess (stoichiometry ~1.05 PS per FX molecule), identifying a single truly PS-specific binding site per Gla domain while remaining membrane interactions are satisfied by PE. |
Surface plasmon resonance with Nanodiscs of defined phospholipid composition |
Journal of thrombosis and haemostasis : JTH |
Medium |
34894064
|
| 2017 |
The C. canimorsus protease CcDPP7 (type 7 dipeptidyl peptidase, S46 serine protease family) inactivates human FX by N-terminal cleavage of both heavy and light chains, inhibiting thrombin generation and prolonging clotting times in vivo. |
Mutagenesis of Cc5 genes; protein purification; Edman degradation for N-terminal cleavage site; clotting assays; in vivo tail bleeding time in mice |
Journal of thrombosis and haemostasis : JTH |
High |
28029716
|
| 2000 |
FX deficiency causes partial embryonic lethality (~1/3 of FX-/- embryos die ~E11.5-12.5) and fatal neonatal bleeding (90% die within 5 days from intraabdominal hemorrhage), establishing FX as essential for embryonic and postnatal hemostasis. |
Targeted gene replacement (knockout mice); genotyping of offspring; histological analysis |
Thrombosis and haemostasis |
High |
10739370
|
| 2000 |
The murine FX promoter is TATA-less with two transcription start sites; NF-Y, HNF-4, and GATA-4 bind the proximal promoter and regulate FX expression, with NF-Y being most critical (ablation reduces activity to 10% of wild-type). |
DNase I footprinting; EMSA; transient transfection in HepG2 cells; promoter deletion analysis |
Thrombosis and haemostasis |
Medium |
11154110
|
| 2015 |
The FX carboxyl-terminal region (downstream of K467) is not essential for secretion or procoagulant activity; deletion of up to 21 carboxyl-terminal residues does not affect secretion or amidolytic activity, in contrast to the homologous regions in FVII, FIX, and PC. |
Recombinant expression of progressively truncated FX variants in HEK293, HepG2, and BHK21 cells; ELISA; coagulant and amidolytic assays; chimeric FX-FVII constructs |
Journal of thrombosis and haemostasis : JTH |
Medium |
26083275
|
| 2021 |
FXa promotes RPE epithelial-mesenchymal transition (EMT) and intraocular fibrosis via PAR1-dependent phospho-activation of p38 MAPK; TGF-β receptor signaling also contributes to FXa-induced fibrosis in vivo. |
FXa ELISA in vitreous; in vitro RPE cell EMT assays; in vivo mouse PVR model with FXa injection; Western blotting for p38, α-SMA; pharmacological inhibitors of FXa, thrombin, and TGF-βR |
Investigative ophthalmology & visual science |
Medium |
34283209
|
| 2011 |
The Ad5-FX-HSPG pathway mediating liver transduction in rodents is conserved in non-human primates (Microcebus murinus); FX-binding-ablated Ad5 vectors target the spleen rather than the liver in these animals. |
Quantitative viral genome and gene transfer measurement in non-human primates after IV administration of wild-type vs. FX-binding-ablated Ad5 |
Gene therapy |
Medium |
21677690
|
| 1986 |
Human FX is synthesized as a single-chain precursor that is proteolytically cleaved to a dimeric form; it contains a leader (prepro) sequence; the 5'-coding region is 60% homologous to factor IX and 40% homologous to prothrombin, consistent with gene duplication. |
cDNA cloning and sequencing from human liver library using synthetic oligonucleotide probes |
Gene |
Medium |
3011603
|
| 2024 |
Substitution of phenylalanine 174 (F174) in FXa with alanine, isoleucine, or serine reduces binding affinity for direct FXa inhibitors (apixaban, rivaroxaban, edoxaban) and also partially reduces inhibition by TFPI, enabling these variants to restore thrombin generation in inhibitor-containing plasma. |
Site-directed mutagenesis; stable expression in HEK293; thrombin generation assays; molecular dynamics simulations for binding affinity; testing in patient plasma |
Journal of thrombosis and haemostasis : JTH |
Medium |
38729577
|
| 2018 |
FX recruits macrophages and promotes M2 polarization in GBM by binding ERK1/2 (inhibiting p-ERK1/2 in tumor cells) and increasing p-ERK1/2 and p-AKT phosphorylation in macrophages; FX expression is regulated by miR-338-3p and lncRNA CASC2c. |
Chemotaxis assays; macrophage polarization assays; co-immunoprecipitation/binding for ERK1/2; ERK/AKT phosphorylation western blots; miRNA overexpression/knockdown |
Frontiers in immunology |
Low |
30034397
|
| 2025 |
Glioblastoma cells express and secrete catalytically active FX (including a C-terminal truncated alternatively spliced form); secreted FX is active in promoting thrombin generation and is upregulated by LPS stimulation or oxygen/glucose starvation. |
RT-PCR and Sanger/amplicon sequencing of F10 isoforms; Western blotting; chromogenic FX activity assay; thrombin generation assay on conditioned medium |
Biomedicines |
Medium |
40149552
|