| 2019 |
HSPA12A selectively binds to the cytoplasmic domain of SorLA (but not Sortilin) in an ADP/ATP-dependent manner, mediated by specific acidic residues in SorLA's cytosolic domain, and this interaction affects both endocytic speed and subcellular localization of SorLA. This is the first described substrate/binding partner of HSPA12A. |
Co-immunoprecipitation/pulldown, ADP/ATP-dependent binding assay, site-directed mutagenesis of SorLA acidic residues, subcellular localization assay, endocytosis assay |
Scientific reports |
Medium |
30679749
|
| 2020 |
HSPA12A directly interacts with PGC-1α in hepatocytes and increases its nuclear translocation, thereby inducing AOAH (acyloxyacyl hydrolase) expression, which inactivates cytosolic LPS and inhibits Caspase-11-mediated gasdermin D cleavage (pyroptosis) during sepsis-induced liver injury. |
Immunoprecipitation (direct protein interaction), loss- and gain-of-function studies (Hspa12a-/- mice and overexpression), immunoblotting for Caspase-11 and GSDMD cleavage, AOAH overexpression rescue experiment |
Cell death and differentiation |
High |
32332915
|
| 2018 |
HSPA12A interacts with the M2 isoform of pyruvate kinase (PKM2) in macrophages and promotes its nuclear translocation, thereby driving M1 macrophage polarization and secretion of pro-inflammatory cytokines, which in turn cause hepatocyte steatosis via paracrine effects in NASH. |
Immunoprecipitation (HSPA12A–PKM2 interaction), loss- and gain-of-function in macrophages, nuclear fractionation, Hspa12a-/- mice on high-fat diet, paracrine co-culture assays |
Diabetes |
High |
30455376
|
| 2019 |
HSPA12A is required for adipocyte differentiation through a positive feedback loop with PPARγ: PPARγ directly binds the PPAR response element in the Hspa12a promoter (confirmed by ChIP), activating HSPA12A expression, while HSPA12A in turn promotes PPARγ expression and adipogenic gene transcription during differentiation. |
Chromatin immunoprecipitation (ChIP) for PPARγ binding to Hspa12a promoter, Hspa12a-/- mouse model (high-fat diet), PPARγ inhibitor (GW9662) rescue, loss- and gain-of-function in primary adipocyte precursors |
Cell death and differentiation |
High |
30742088
|
| 2020 |
HSPA12A in renal cell carcinoma (RCC) cells interacts with HRD1 ubiquitin E3 ligase and promotes ubiquitin-proteasome degradation of CD147, thereby reducing lactate export and glycolysis, and suppressing RCC cell migration. CD147 overexpression abolishes HSPA12A's inhibitory effects on lactate export and migration. |
Mass spectrometry (interactome), immunoprecipitation (HSPA12A–HRD1 interaction), cycloheximide chase and MG132 proteasome inhibitor assays (protein stability), CD147 overexpression rescue, Transwell migration and wound healing assays, Seahorse glycolysis assay |
Theranostics |
High |
32754264
|
| 2021 |
HSPA12A overexpression in endothelial cells protects against LPS-induced endothelial hyperpermeability and death by activating ERKs and Akt phosphorylation; pharmacological inhibition of either ERKs or Akt abolished HSPA12A's protective effects. HSPA12A also upregulated VE-cadherin and downregulated VEGF expression. |
HSPA12A overexpression in HUVECs, Hspa12a-/- mouse model (LPS-induced ALI), ERK/Akt inhibitor treatment, immunoblotting for phosphorylation, permeability assay, cell death assay |
International immunopharmacology |
Medium |
34343936
|
| 2022 |
HSPA12A promotes angiogenesis in endothelial cells by activating p38 and ERK phosphorylation, leading to increased AP-1 phosphorylation and nuclear localization, which drives expression of VEGF, VEGFR2, and Ang-1. Inhibition of p38 or ERKs abolished HSPA12A-promoted AP-1 activation and angiogenic characteristics. |
HSPA12A overexpression/deficiency in endothelial cells, Hspa12a-/- mouse MI model, p38/ERK inhibitor pharmacological rescue, immunoblotting for phosphorylation, nuclear fractionation, tube formation/migration/proliferation assays, echocardiography |
Oxidative medicine and cellular longevity |
Medium |
35783189
|
| 2022 |
SRSF11 directly binds a motif in exon 2 of HSPA12A pre-mRNA (confirmed by CLIP and mini-gene assay) and promotes exon 2 skipping; the HSPA12A transcript retaining exon 2 increases N-cadherin expression by enhancing RNA stability, thereby promoting colorectal cancer metastasis. PAK5 phosphorylates SRSF11 at serine 287 to protect it from ubiquitination, maintaining SRSF11-mediated HSPA12A splicing regulation. |
UV crosslinking and immunoprecipitation (CLIP), mini-gene reporter assay, RNA-seq, in vitro kinase assay (PAK5 phosphorylates SRSF11), Co-IP, Phospho-tag SDS-PAGE, RNA stability assay |
Clinical and translational medicine |
Medium |
36394206
|
| 2023 |
Hepatocyte HSPA12A overexpression reduces glycolysis-generated lactate, thereby decreasing HMGB1 lactylation and secretion from hepatocytes during liver ischemia/reperfusion (LI/R); HMGB1 knockdown reversed the deleterious effects of HSPA12A knockout on macrophage chemotaxis and inflammatory activation, placing HSPA12A upstream of glycolysis → lactate → HMGB1 lactylation → macrophage recruitment in LI/R injury. |
Hepatocyte-specific HSPA12A overexpression (in vivo), Hspa12a-/- mice, HMGB1 knockdown rescue, immunoprecipitation for HMGB1 lactylation, Transwell chemotaxis assay, exosome HMGB1 quantification, ALT/AST assays |
Theranostics |
High |
37441587
|
| 2023 |
HSPA12A in hippocampal neurons inhibits GSK3β to sustain glycolytic enzyme expression and lactate production; Hspa12a-/- mice show decreased CSF lactate, impaired adult hippocampal neurogenesis, and mood instability behaviors, all of which are rescued by lactate administration, establishing HSPA12A as a regulator of cerebral lactate homeostasis via GSK3β inhibition. |
Hspa12a-/- mouse behavioral tests (open field, forced swimming, elevated plus maze, sucrose preference), BrdU neurogenesis labeling, CSF lactate measurement, HSPA12A overexpression in primary hippocampal neurons (glycolysis readout), lactate rescue administration |
Translational psychiatry |
Medium |
37580315
|
| 2024 |
HSPA12A acts as a scaffolding protein in cardiac fibroblasts by binding both p53 and USP10 (ubiquitin-specific protease 10) simultaneously, thereby promoting USP10-mediated deubiquitination and stabilization of p53 protein, which in turn inhibits glycolysis and prevents cardiac fibroblast activation into myofibroblasts; Hspa12a-/- mice showed exacerbated cardiac fibrosis post-MI. |
Immunoprecipitation-immunoblotting (HSPA12A–p53 and HSPA12A–USP10 interactions), cycloheximide and MG132 stability assays, Hspa12a-/- mouse MI model, Masson/picrosirius staining for fibrosis, echocardiography, primary cardiac fibroblast loss/gain-of-function |
Journal of advanced research |
High |
38219869
|
| 2024 |
In cardiomyocytes, HSPA12A maintains aerobic glycolysis during reperfusion by increasing Smurf1-mediated HIF1α protein stability, which upregulates glycolytic gene expression and sustains H3 (Histone 3) lactylation as an epigenetic mechanism supporting cardiomyocyte survival; Hspa12a-/- mice showed exacerbated aerobic glycolysis decrease and worse MI/R injury. |
Hspa12a-/- mouse MI/R model, gain- and loss-of-function in cardiomyocytes, glycolytic flux measurement, H3 lactylation assay (epigenetic readout), HIF1α protein stability assay, Smurf1-dependent mechanism analysis, echocardiography |
JCI insight |
Medium |
38421727
|
| 2024 |
HSPA12A directly interacts with c-Myc in renal tubular epithelial cells and enhances its nuclear localization; HSPA12A also promotes glycolysis-derived lactate generation in a HIF1α-dependent manner, increasing c-Myc lactylation, which further enhances c-Myc nuclear localization and transcription of proliferation-related genes to support TEC proliferation after KI/R; inhibiting c-Myc lactylation abolished HSPA12A-induced proliferation. |
Co-immunoprecipitation (HSPA12A–c-Myc direct interaction), c-Myc lactylation assay, pharmacological inhibition of c-Myc lactylation, nuclear fractionation, gain-of-function HSPA12A overexpression, HIF1α-dependent mechanism analysis, Hspa12a-/- mouse KI/R model |
Cellular and molecular life sciences : CMLS |
Medium |
39277835
|
| 2024 |
In cardiomyocytes during sepsis, HSPA12A overexpression activates mTOR and inhibits autophagy, thereby enhancing TLR4/MyD88/NF-κB-mediated inflammation; conversely, HSPA12A knockout attenuated sepsis-induced cardiomyocyte death and cardiac dysfunction. Rapamycin (mTOR inhibitor) abolished the HSPA12A-induced autophagy inhibition and inflammation, placing HSPA12A upstream of mTOR-autophagy in the septic cardiomyopathy pathway. |
Hspa12a-/- mouse CLP sepsis model, HSPA12A overexpression in primary cardiomyocytes, rapamycin pharmacological rescue, LC3-II/p62 autophagy markers, NF-κB pathway immunoblotting, TUNEL/PI death staining, echocardiography |
International immunopharmacology |
Medium |
39642573
|
| 2021 |
HSPA12A downregulation during bupivacaine-induced myotoxicity underlies mitochondrial damage in skeletal muscle; HSPA12A overexpression attenuated bupivacaine-induced cell death, restored glucose consumption and ATP production, reduced mitochondrial fragmentation, and maintained PGC1α expression and nuclear localization. Pharmacological inhibition of PGC1α (SR-18292) abolished HSPA12A-mediated protection, placing HSPA12A upstream of PGC1α-mediated mitochondrial integrity. |
HSPA12A overexpression in C2C12 myoblasts, PGC1α inhibitor (SR-18292) rescue, mitochondrial content and morphology assay, ATP production assay, PGC1α nuclear fractionation, Bupivacaine in vivo mouse model |
Toxicology and applied pharmacology |
Medium |
34793778
|
| 2024 |
HSPA12A promotes HIF1α protein stability through a Smurf1-dependent mechanism in renal tubular epithelial cells (HK-2) after hypoxia/reoxygenation, independently of HIF1α transcription; HIF1α pharmacological inhibition (YC-1) abolished HSPA12A-promoted glycolytic flux and cell proliferation, confirming HSPA12A acts through Smurf1→HIF1α→glycolysis to support TEC proliferation. |
HSPA12A gain- and loss-of-function in HK-2 cells, HIF1α inhibitor (YC-1), cycloheximide protein stability assay, qPCR (HIF1α transcription vs. protein), glycolysis inhibitors (2-DG, oxamate), proliferation assay |
Cell stress & chaperones |
Medium |
39349238
|