Results 321 to 330 of about 177,422 (372)
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Radioimmunoassay for human chorionic gonadotropin
American Journal of Obstetrics and Gynecology, 1968Abstract A radioimmunoassay method for HCG utilizing I 125 for iodination and a chemical procedure for separation of free and bound HCG 125 are described. This method is more sensitive and more accurate than the hemagglutination inhibition technique.
Myroslaw M. Hreshchyshyn, Yutaka Tomoda
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Chorionic Gonadotropin In Choriocarcinoma
JAMA: The Journal of the American Medical Association, 1972To the Editor.— Although Stilp et al 1 recommended assay of cerebrospinal fluid for chorionic gonadotropin in metastatic choriocarcinoma of the brain, in none of their four cases are such titers reported. Curiously, their first reference 2 does not mention the use of cerebrospinal fluid titers.
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Studies of Human Chorionic Gonadotropin
1971Publisher Summary This chapter focuses on human chorionic gonadotropin (HCG), a glycoprotein hormone produced by the placenta that appears in significant quantities in the urine during the first trimester of pregnancy. The mean level of urinary HCG produced during the first trimester is 30,000–50,000 IU in 24 hours, equivalent to a maximum of ...
Sandra Kammerman +4 more
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Antibody-free detection of human chorionic gonadotropin by use of liquid crystals.
Analytical Chemistry, 2013Human chorionic gonadotropin (hCG) is an important biomarker for the diagnosis of pregnancy and cancers. In this study, we report an antibody-free and label-free mechanism for detecting hCG.
Xiaokang Ding, Kun‐Lin Yang
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Human chorionic gonadotropin in pregnancy diagnostics
Clinica Chimica Acta, 2011Human chorionic gonadotropin (hCG) is a 237 aminoacid glycoprotein hormone composed of two dissimilar α and β subunits noncovalently linked by charge interactions, which are both required for the biological activity of the hormone. Due to structural heterogeneity, hCG exists in biological fluids as a mixture of different isoforms, i.e., intact active ...
MONTAGNANA, Martina +4 more
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Biosynthesis of Human Chorionic Gonadotropin*
Endocrine Reviews, 1980HUMAN chorionic gonadotropin (hCG) is a glycoprotein hormone normally secreted by trophoblastic cells of the placenta during pregnancy. Trophoblastic tumors and some nontrophoblastic tumors also secrete hCG and/or its α- or β-subunit. This review emphasizes a number of aspects, some controversial, of hCG biosynthesis and secretion that have received ...
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Immunocytochemistry of human chorionic gonadotropin in human chorionic villi
American Journal of Obstetrics and Gynecology, 1987The immunocytochemical localization of human chorionic gonadotropin was investigated in chorionic villi from the seventh to twelfth week of gestation. By the light microscopic peroxidase-antiperoxidase technique, positive reactions of human chorionic gonadotropin were found exclusively in the syncytiotrophoblast.
Kunshige Hamasaki +4 more
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Archives of Andrology, 1988
We measured testicular human chorionic gonadotropin (hCG) receptors in 30 infertile men either before or 1, 3, 5, 7, or 14 days after a single administration of 5000 IU of hCG. For 5 days the administration of hCG significantly reduced the testicular binding of 125I-hCG compared with that of the testes before administration.
Kunio Matsumoto +8 more
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We measured testicular human chorionic gonadotropin (hCG) receptors in 30 infertile men either before or 1, 3, 5, 7, or 14 days after a single administration of 5000 IU of hCG. For 5 days the administration of hCG significantly reduced the testicular binding of 125I-hCG compared with that of the testes before administration.
Kunio Matsumoto +8 more
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Hormone Research, 1988
Changes in rat and human testicular human chorionic gonadotropin (hCG) binding sites induced by hCG were estimated in vivo and in vitro. After a single administration of hCG, the specific 125I-hCG bindings were significantly reduced for 7 and 5 days in rat and human testes, respectively.
Takao Sonoda +8 more
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Changes in rat and human testicular human chorionic gonadotropin (hCG) binding sites induced by hCG were estimated in vivo and in vitro. After a single administration of hCG, the specific 125I-hCG bindings were significantly reduced for 7 and 5 days in rat and human testes, respectively.
Takao Sonoda +8 more
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Chorionic Gonadotropin Tests for Diagnosis of Pregnancy and Chorionic Tumors
Postgraduate Medicine, 1969Various chorionic gonadotropin tests (HCG) for the diagnosis of pregnancy and chorionic tumors are reviewed. The tests divide into biological and immunological groups. Immunological methods are generally more sensitive than biological methods. A brief description of the widely used hemagglutination inhibition and latex particle agglutination methods
Robert B. Greenblatt +2 more
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