seminoma/phosphatase

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Placental-like alkaline phosphatase in seminoma.

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Tumor marker identification in testicular cancer has contributed to early detection and monitoring of non-seminomatous disease. A placental alkaline phosphatase-like (PLAP-like) enzyme derived from seminomas has recently been focused upon as a possible marker for this disease. The biochemistry of

Isolation and purification of placental type alkaline phosphatase from a seminoma.

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An alkaline phosphatase (EC 3.1.3.1) of the placental type was isolated from a seminoma type of human testicular cancer tissue and was purified to homogeneity by sulfate-mediated chromatography on a column of Cibacron Blue Sepharose 4B. The purified enzyme had a specific activity of 40.6 kU per gram

Placental alkaline phosphatase as a tumor marker for seminoma.

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A sensitive and specific enzyme-linked immunoabsorbent assay was used in a retrospective study of serum levels of placental alkaline phosphatase (PLAP) in testicular cancer. Sixteen of 28 men with active seminoma had elevated PLAP levels, and 71% had elevated levels of either PLAP, human chorionic

Purification and characterization of alkaline phosphatase from human seminomas.

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Despite the apparent link between the presence of alkaline phosphatase (ALP) and various cancers, it has so far been difficult to determine distinct differences between seminoma-derived ALP and placental ALP (PLAP). In order to determine specificity, we purified ALP from a seminoma type of human

Placental-like alkaline phosphatase and DNA flow cytometry in spermatocytic seminoma.

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Immunohistochemical analysis was done on 7 testicular tumors classified as spermatocytic seminoma (SS) and 25 classic seminomas. Except for a few scattered cells, the spermatocytic seminomas were negative for placental-like alkaline phosphatase (PLAP); the classic seminomas were all positive for

Is placental alkaline phosphatase (PLAP) a useful marker for seminoma?

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The usefulness of placental alkaline phosphatase (PLAP) as a tumour marker was assessed in 1578 serum samples from 236 patients with seminoma. Smoking habits were known for all but 7 patients (22 samples). Smoking was associated with significantly higher mean levels of PLAP in disease-free patients

Placental alkaline phosphatase as a tumour marker in seminoma using the H17 E2 monoclonal antibody assay.

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Serum samples from 62 patients with seminoma were assayed for placental alkaline phosphatase-like activity using the monoclonal antibody H17 E2, in order to evaluate its utility as a serum tumour marker. Fifteen of 16 patients (94%) with active seminoma had elevated serum PLAP levels. Sixteen of 46

A potential use of a monoclonal antibody to placental alkaline phosphatase (PLAP) to detect lymph node metastases of seminoma.

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OBJECTIVE To evaluate the ability of monoclonal antibodies against alkaline phosphatase (AL-P) for tumor immunolocalization in nude mice. METHODS Two monoclonal antibodies against placental alkaline phosphatase (PLAP) and liver alkaline phosphatase (LAP) were intravenously administered to nude mice

Preliminary observations on the application of carcino-placental alkaline phosphatase to the investigation of patients with seminoma of the testes.

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Suitable tumour markers for monitoring the treatment of seminoma of the testis have not yet been established in clinical practice. Carcino-placental alkaline phosphatase (CPAP) has been suggested for this purpose but it is difficult to detect and specifically analyse this enzyme. We have devised an

Placental alkaline phosphatase in patients with seminoma measured by ELISA as compared to RIA.

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Placental alkaline phosphatase (PLAP) has been shown to be a reliable tumor marker in the management of patients with seminoma. Radioimmunoassay (RIA) and Enzyme linked immunoassay (ELISA) procedures were compared for PLAP levels in serum of seminoma patients. The statistical analysis showed

A clinical evaluation of serum placental alkaline phosphatase in seminoma patients.

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Serum levels of placental alkaline phosphatase (PLAP) were measured in 100 patients with seminoma. A specific double antibody radioimmunoassay was used. PLAP was elevated for 9 out of 21 patients with primary tumours, to a mean of 53 micrograms/l. Of the 12 cases with recurrent or metastatic growth,

Immunohistochemical Expression of Placental Alkaline Phosphatase in Five Cases of Seminoma in Rabbits.

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Testicular seminoma is reported in the rabbit but data about the immunophenotype of these tumours are lacking. The classification of human testicular germ cell tumours includes spermatocytic tumour (ST) originating from the post-pubertal spermatogonia/spermatocytes, which metastasizes rarely, and

Hydrophobicity and lectin affinity of alkaline phosphatase isozymes in seminoma and normal testis.

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Isozymes of alkaline phosphatases (ALP) in seminoma and normal testis were separated by use of high-performance liquid chromatography and a TSK-gel phenyl-5PW column. The tissue-nonspecific (liver) ALP (LAP) was the dominating isozyme, consisting of more than 90% ALP activity. The placental ALP

An assessment of combined tumour markers in patients with seminoma: placental alkaline phosphatase (PLAP), lactate dehydrogenase (LD) and beta human chorionic gonadotrophin (beta HCG).

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We have assessed the tumour markers placental alkaline phosphatase (PLAP), lactate dehydrogenase (LD), and human chorionic gonadotrophin (beta HCG) using 2,000 serum samples from 286 patients with seminoma. The ROC curves show that no one marker performs adequately for the detection of disease

Characterization of alkaline phosphatase genes expressed in seminoma by cDNA cloning.

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Two members of a placental alkaline phosphatase (PLAP) family, PLAP and PLAP-like or germ cell alkaline phosphatase, are aberrantly expressed in tumors of ecotropic origin. To characterize alkaline phosphatase induced in seminoma, alkaline phosphatase cDNA clones were isolated from a cDNA library

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