osteosarcoma/phosphatase

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High alkaline phosphatase activity of telangiectatic osteosarcoma (TOS) and its diagnostic significance.

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Telangiectatic osteosarcoma (TOS) which occurred in the metaphysis of the right femoral bone in a 13-year-old female was reported. It showed osteolytic and cystic lesion without sclerotic change on roentgenogram and consisted histologically of various sized blood-filled spaces lined by layers of

The Role of Osteocalcin and Alkaline Phosphatase Immunohistochemistry in Osteosarcoma Diagnosis.

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UNASSIGNED The diagnosis of Osteosarcoma (OSA) is not always straightforward. OSA may resemble Other Primary Bone Tumours (OPBT). The diagnosis of osteosarcoma is sometimes difficult especially in a very small specimen. Immunohistochemistry is one of ancillary testing types that can help the

Bone-specific alkaline phosphatase in plasma as tumour marker for osteosarcoma.

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The levels of bone-specific alkaline phosphatase (BALP) in plasma and tumour tissue samples of 20 Chinese patients with osteosarcoma in Hong Kong were measured by the wheat germ lectin precipitation technique. The plasma BALP levels in these patients were significantly higher than those of the

Does serum alkaline phosphatase level really indicate the prognosis in patients with osteosarcoma? A meta-analysis.

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UNASSIGNED Osteosarcoma is the most common malignant bone tumor that occurs in children and adolescents. Various studies have investigated the role of serum alkaline phosphatase (ALP) level in patients with osteosarcoma but report conflicting findings. Thus, a meta-analysis to assess its prognostic

Osteosarcoma. Ultrastructural and immunohistochemical studies on alkaline phosphatase-positive tumor cells constituting a variety of histologic types.

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The osteosarcomas were subclassified into osteoblastic, fibroblastic, chondroblastic and telangiectatic types and examined by electron microscopy. Their immunohistochemical reactions were also studied. In an overall survey of the above types, fibroblast-like cells revealed poorly developed

Identification of candidate genes involved in the reversal of malignant phenotype of osteosarcoma cells transfected with the liver/bone/kidney alkaline phosphatase gene.

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Alkaline phosphatases (ALPs) are a family of cell surface glycoproteins that catalyze the hydrolysis of phosphomonoesters with release of inorganic phosphate. Liver/bone/kidney (L/B/K) ALP participates in bone mineralization, but its other physiological and pathological functions remain obscure. In

Reassessment of alkaline phosphatase as serum tumor marker with high specificity in osteosarcoma.

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The goal of this study was to reassess serum alkaline phosphatase (ALP) as tumor marker in osteosarcoma. We retrospectively examined serum ALP levels at diagnosis, every therapeutic step (neoadjuvant chemotherapy, surgery, and adjuvant chemotherapy), metastasis, and follow-up and analyzed the role

Effects of ascorbic acid on alkaline phosphatase activity and hormone responsiveness in the osteoblastic osteosarcoma cell line UMR-106.

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L-ascorbic acid at physiological concentrations (10 micrograms/ml) increased alkaline phosphatase activity in the osteoblastlike rat osteosarcoma cell line, UMR-106. The increase was dose-dependent and detectable at 6 hours after the addition of 100 micrograms/ml ascorbic acid to the medium.

cDNA cloning of alkaline phosphatase from rat osteosarcoma (ROS 17/2.8) cells.

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Two cDNA clones of rat alkaline phosphatase (AP) were isolated from a rat osteosarcoma lambda gt 11 cDNA library (ROS 17/2.8) utilizing a human bone-liver-kidney (BLK) type AP cDNA. These clones contain overlapping DNA sequences of 597 and 520 bp, respectively, corresponding to the 3' noncoding

Phosphate regulates the stability of skeletal alkaline phosphatase activity in human osteosarcoma (SaOS-2) cells without equivalent effects on the level of skeletal alkaline phosphatase immunoreactive protein.

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Inorganic phosphate (P(i)) can regulate the level of skeletal alkaline phosphatase (ALP) activity in human osteoblast-like cells, but not by means of changes in transcription or release from the cell surface. The current studies were intended to determine whether (1) P(i) affected the inactivation

Paradoxical effects of phosphate to directly regulate the level of skeletal alkaline phosphatase activity in human osteosarcoma (SaOS-2) cells and inversely regulate the level of skeletal alkaline phosphatase mRNA.

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Recent studies indicate that the amount of alkaline phosphatase (ALP) activity in human osteoblast-line cells is proportional to the concentration of phosphate in the culture medium. The current studies were intended to extend those observations and to determine whether the effects of phosphate (and

Detection of bone-type alkaline phosphatase by monoclonal antibodies reacting with human osteosarcoma-associated antigen.

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The antigen detected by monoclonal antibodies reacting with human osteosarcoma-associated antigen was shown to be a phosphatidyl-inositol (PI)-glycan-anchored protein, which can be released from the cell surface by PI-specific phospholipase C-treatment. The antigen detected by 2D3 and 2H10

Extinction of liver/bone/kidney alkaline phosphatase in osteosarcoma hybrid cells.

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We have constructed a series of interspecific somatic cell hybrids between the human osteoblast-like osteosarcoma, TE85, and a mouse fibrosarcoma, La-t-. In these whole-cell hybrids, we observed a 10-fold reduction of human liver/bone/kidney (L/B/K) alkaline phosphatase steady-state mRNA and

P65-mediated miR-590 inhibition modulates the chemoresistance of osteosarcoma to doxorubicin through targeting wild-type p53-induced phosphatase 1.

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Osteosarcoma (OS) is a primary malignant bone tumor with high morbidity. Developing new therapeutic approaches with neoadjuvant is of great interest in OS treatment. Reportedly, ataxia telangiectasia mutated (ATM)/ataxia telangiectasia and radiation resistance gene 3 related (ATR)-p53 signaling is

Purification and characterization of bone-specific alkaline phosphatase from a human osteosarcoma cell line.

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Bone-specific alkaline phosphatase (bone ALP) levels are considered to reflect osteoblastic activity and can therefore be used as a marker of bone formation. However, bone ALP is difficult to distinguish from other ALP isoforms since the kidney, liver, and bone isoenzymes are encoded by the same

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