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Results provide evidence that OPN facilitates West Nile virus (WNV) neuroinvasion by recruiting WNV-infected polymorphonuclear neutrophils into the brain.
During the interaction of fibroblasts and cancer cells, the increased neoplastic OPN induced by stromal IL-6 accelerated the growth, migration and invasion of cancer cells. More importantly, the authors also showed that soluble OPN could promote head and neck cancer progression via the integrin alphavbeta3-NF-kappa B pathway.
Loss of osteopontin is associated with glioblastoma-promoting microenvironment.
The rare occurrence of antibodies to either osteopontinb or osteopontinc suggests that the breaking of tolerance to fulllength osteopontin is more prevalent in tumor autoimmunity than a reaction to a poorly immunogenic neoepitope.
OPNa is the main contributor to matrix calcification in tested thyroid cancer cells.
Higher SPP1 plasma levels in PMF patients correlate with a more severe fibrosis degree.
Plasma OPN levels were associated with the presence and severity of diabetic retinopathy in Asians with type 2 diabetes.
Study demonstrated that osteopontin exerts an important role in the monocytes/macrophage phenotypic differentiation from hypertensive patients with vascular calcification.
The expression of OPN was high in endometrium in secretory phase and in vitro decidualized endometrial stromal cells. Further analysis confirmed that OPN expression was upregulated by cAMP and C/EBPbeta signal pathway, while downregulated by miR181b. Increased OPN expression could promote the expression of decidualization-related and angiogenesis-related genes
Results of the study showed that low urinary OPN levels were correlated with increased kidney stone risk, and dietary habits can affect urinary OPN level
The serum levels of cystatin C and urine NGAL, urine OPN can be used as a good marker for assessing the renal effect of obesity which can lead end stage renal disease in pediatric population.
novel 9175th- (exon 7) position polymorphism of OPN and rs17524488 were related to susceptibility to ankylosing spondylitis in a Chinese population
Over-expressed and hypo-methylated SPP1 gene is associated with hepatocellular carcinoma.
Serum osteopontin concentrations were increased in acute pancreatitis (AP) compared with follow-up 3 months after discharge.
Our data provide evidence that leptin-mediated OPN upregulation promote TH2 inflammation in AR and this process is achieved through the alpha4 integrin and PI3K/AKT signaling pathways.
miR-129-5p level was decreased in fibrotic liver of human, and reduced by rOPN treatment. In contrast, miR-129-5p was induced in HSCs transfected by OPN siRNA. These data suggested that OPN induces Col 1 expression via suppression of miR-129-5p in hepatic stellate cells.
High circulating osteopontin levels predict major adverse cardiovascular events in patients with severe carotid artery stenosis.
High SPP1 Expression is associated with Hepatocellular Carcinomas.
Serum OPN and DKK1 levels of hepatocellular carcinoma patients could be considered as novel biomarkers showing prognostic significance after hepatectomy based on long-term survival data
Upregulation of ADIPOR1 and SPP1, among the adipokine gene family, in cancer tissue is associated with poor survival in CRC, suggesting a potential mechanism linking obesity and colorectal cancer.
Osteopontin overexpression in non-alcoholic steatohepatitis enhances leptin-mediated fibrogenesis via PI3K/Akt.
The data of this study suggest that OPN is essential for proper astrocytic generation in vitro culture prepared from mouse cerebral cortex.
Study shows that potent pro-inflammatory and pro-fibrotic molecules, osteopontin and galectin-3, are not major disease modulators of laminin alpha2 chain-deficient muscular dystrophy.
Osteopontin activates the NF-kappaB pathway and accelerates the transfer and phosphorylation of p-NF-kappaB P65 from the cytoplasm to the nucleus. In the nucleus, p-NF-kappaB P65 regulates the transcription of genes encoding bone transcription factors, affecting osteogenesis and osteoclast synthesis and the secretion of bone-damaging factors, and ultimately leading to bone destruction.
Study demonstrates that osteopontin has an essential role in modulating macrophage immunological profile and their ability to resist pathogenic forms of amyloid beta-protein.
BSP and pyrophosphates work in concert to direct mineralization in cementum and likely other mineralized tissues.
OPN deficiency has a protective effect against the progressive lipid deposition and glomerulosclerosis elicited by hypercholesterolemia.
The present study demonstrated that OPN deficiency reduced intestinal absorption of cholesterol by suppressing the expression of NPC1L1, thus protecting mice from cholesterol gallstone formation.
OPN regulates CYP7A1 levels and the metabolic fate of liver acetyl-CoA as a result of CHOL and PC metabolism interplay
These results demonstrate that OPN expressed by fatigue-resistant/slow motor neurons is involved in the second-wave neurodegeneration by up-regulating MMP-9 through alphavbeta3 integrin in the mouse model of amyotrophic lateral sclerosis.
Osteopontin is highly induced in carbon nanotube-exposed lungs and plays critical roles in TGF-beta1 signaling activation and myofibroblast differentiation to promote fibrosis development.
The findings reveal that hepatic OPN contributes to cholesterol gallstone formation by regulating biliary metabolism and might be developed as a therapeutic target for gallstone treatments.
Endogenous OPN emerges as a key player in the pathogenesis of chronic Chagas heart disease, through the upregulation of myocardial CCL5/MMP-2 expression and activities resulting in pro-inflammatory and pro-hypertrophic events, cardiac remodeling and interstitial fibrosis.
In this study, the effect of deficiency of OPN on intestinal tumor development in Apc-deficient Min mice was investigated.At 16 weeks of age, the number of small intestinal polyps in Min/OPN(+/-) and Min/OPN(-/-) mice was lower than that of Min/OPN(+/+) mice. Colorectal tumor incidences and multiplicities in Min/OPN(+/-) and Min/OPN(-/-) mice were significantly lower than those in Min/OPN(+/+) mice
Osteopontin RNA aptamer is a novel and effective approach for preventing cardiac hypertrophy and fibrosis, improving cardiac function, and reversing pressure overload-induced heart failure.
OPN deficiency reduced the incidence of chemically induced HCC by suppressing EGFR-mediated anti-apoptotic signaling.
In experimental autoimmune encephalomyelitis treated with interferon-beta, OPN was significantly decreased in splenocyte supernatants. Neutralizing OPN antibodies offset the inhibitory effect of IFN-beta on Th17 cells. IFN-beta influenced the acetylation of the Opn gene promoter. IFN-beta plays a role in Th17 differentiation partly through the inhibition of OPN.
Osteopontin plays a key role in vascular smooth muscle cell via signaling pathways involving AP-1 and C/EBP beta, leading to increases in vascular smooth muscle cell proliferation and subsequent vascular remodeling.
study first addressed in detail the LF/fOPN interaction and proposed a LF:fOPN 4/1 maximal stoichiometry.
This implies that a majority of the acidic residues within OPN must be engaged in calcium interaction under physiological conditions.
Genetic variations in the SPP1 promoter affect gene expression and the level of osteopontin secretion into bovine milk.
Osteopontin, osteocalcin and OB-cadherin expression in Synthetic nanohydroxyapatite vs bovine hydroxyapatite cultured Osteoblastic-like cells.
osteopontin (OPN) can serve as a process-directing agent for the intrafibrillar mineralization of collagen.
Results suggest a mechanism of the interaction of UO2(2+) with bone metabolism and a new role for osteopontin (OPN) as a metal transporter.
Upon induction of luteolysis, SPP1 serves as a signaling molecule to recruit or activate immune cells to facilitate luteal regression and tissue degradation.
OPN strongly reduces the amount of biofilm formed in a well-defined laboratory model of acidogenic dental biofilm.
This study demonstrates that adhesion of isolated neonatal rat osteoclasts in vitro was augmented on bovine milk osteopontin (bmOPN) with post-translational modifications (PTMs) compared to human Escherichia-coli-derived recombinant OPN without PTMs.
topographical distribution of both the in vivo and in vitro phosphorylation sites of bone sialoprotein
the bovine osteopontin gene has two functionally distinct clusters of haplotypes within the QTL region on chromosome 6
The relationship between polymorphisms in SPP1 and several factors affecting growth and development in beef cattle was studied.
findings show significant association of osteoponitin variants with milk composition traits
In this study, we have expressed bovine osteopontin in a prokaryotic system and identified the seven amino acid residues phosphorylated in vitro by CKII.
The binding of bovine seminal proteins A1, A2, and 30 kDa and osteopontin to spermatozoa and the effects of oviductal fluid on protein binding are reported.
Results of this study confirm for the first time, the expression of Opn in the ileum and ileocecal lymph node of cattle with paratuberculosis.
Opn may be a key regulator against Mycobacterium avium ssp. paratuberculosis infection
The role of OPN phosphate groups in adsorption to, incorporation into and inhibition of calcium oxalate monohydrate crystals was studied by comparing OPN isoforms differing in phosphorylation.
SPP1 (also known as osteopontin) has a significant role in the modulation of milk protein gene expression.
OPN may act as a carrier protein for LF in milk, and modulate the potent antimicrobial and immunostimulatory activities of the LF protein.
These data suggested that methylation in the OPN promoter plays a crucial role in the regulation of OPN expression that we found in cloned pigs genome.
The striking breed differences between hyperprolific Large White and Meishanin pigs of secreted phospoprotein 1 expression in endometrium suggest that SPP1 may be associated with placental efficiency.
Microglia incubated in vitro with different concentrations (0.1 fM-1 nM) of recombinant osteopontin showed increased proliferation at 10 fM.
results of this study reveal faster growth rate and differences in pig productivity according to genotypes of the SPP1 gene
Osteopontin could play an important role in the development of neointimal hyperplasia in venous conduits after coronary artery bypass grafting.
A different MSSCP pattern was shown in osteopontin which indicates that mutation is located in promotor region; the A --> G transitions was identified in two positions -617 and -608
The 3' terminal end of the first intron of porcine SPP1 harbors a C/EBPbeta binding site and this binding site is negatively affected by the mutant G allele.
in pregnant pigs SPP1 is induced by conceptus estrogen in uterine luminal epithelium and is regulated in a manner coincident with placental progesterone production
osteopontin promotes pathologic mineralization via calcium pyrophosphate dihydrate crystal formation in articular cartilage.
Osteopontin is detected in the majority of germ cells and is involved in spermatogenesis in boar testis.
Infection of urinary tract by Escherichia coli caused higher than normal expression of promoter protein osteopontin and mucosal damage at renal tubular cells.
The SPP1 was principally expressed in motor neurons in lamina IX of the macaque spinal cord.The expression level varied among different spinal segments and correlated positively with neuron size.
results demonstrate that SPP1 is expressed in corticospinal tract neurons in M1 and several other sensorimotor cortices
The protein encoded by this gene is involved in the attachment of osteoclasts to the mineralized bone matrix. The encoded protein is secreted and binds hydroxyapatite with high affinity. The osteoclast vitronectin receptor is found in the cell membrane and may be involved in the binding to this protein. This protein is also a cytokine that upregulates expression of interferon-gamma and interleukin-12. Several transcript variants encoding different isoforms have been found for this gene.
, early T-lymphocyte activation 1
, osteopontin/immunoglobulin alpha 1 heavy chain constant region fusion protein
, secreted phosphoprotein 1 (osteopontin, bone sialoprotein I, early T-lymphocyte activation 1)
, urinary stone protein
, 44 kDa bone phosphoprotein
, bone sialoprotein 1
, calcium oxalate crystal growth inhibitor protein
, early T-lymphocyte activation 1 protein
, osteopontin-like protein
, Sialoprotein (osteopontin)
, bone sialoprotein I
, spp1 protein
, secreted phosphoprotein-1
, LOW QUALITY PROTEIN: osteopontin
, Bone sialoprotein 1