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The regulation of the proliferation and differentiation of rat Leydig cell precursor cells after EDS administration or daily HCG treatment
Leydig cell Leydig cell precursor LH hCG EDS proliferation
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2009/2/23
The proliferation and differentiation of possible Leydig cell precursors in adult rats were studied after destruction of the existing Leydig cells with EDS or after daily treatment with hCG. After 2...
Effects of chronic sulpiride-induced hyperprolactinemia on plasma testosterone and its responses to hCG in normal men
Effects of chronic sulpiride-induced hyperprolactinemia plasma testosterone hCG normal men
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2009/2/23
To elucidate the effects of sulpiride-induced (300 mg daily) long-term (64 days) hyperprolactinemia on basal and hCG-stimulated plasma testosterone (T), hCG was given to five normal men five times...
HCG treatment increases intratesticular pressure in the abdominal testis of unilaterally cryptorchid rats
testis cryptorchidism hCG vascular permeability
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2009/2/23
Adult, unilaterally cryptorchid rats were given a single subcutaneous injection of hCG. HCG treatment of 100 I.U. (but not 10 I.U.) resulted in a marked increase in intratesticular pressure (approxi...
Binding and internalization in vivo of [125I]hCG in Leydig cells of the rat
Binding and internalization [125I]hCG Leydig cells rat
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2009/2/23
The present study was performed to demonstrate the binding, mode of uptake, pathway and fate of iodinated human chorionic gonadotropin ([125I]hCG) by Leydig cells in vivo using electron microscope...
Characteristics of prolactin-modulated LH induction of LH/hCG receptors. Transient inhibition of receptor induction following prolactin exposure
LH luteinizing hormone
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2009/2/23
The temporal relationship between exposure to prolactin (PRL) and luteinizing hormone (LH) induction of LH receptors was investigated in hypophysectomized adult male rats. Testicular homogenate me...
Response to acute hCG stimulation and steroidogenic potential of Leydig cell fibroblastic precursors in humans
acute hCG stimulation steroidogenic potential Leydig cell fibroblastic precursors humans
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2009/2/20
The process of early testosterone (T) secretion and Leydig cell differentiation in humans was studied to explore the steroidogenic capacity of Leydig cell fibroblastic precursors. Seven cryptorchi...
Testicular blood flow in young and old rats and influence of hCG
testis blood flow hCG rat aging
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2009/2/20
To evaluate the influence of age, testicular capillary blood flow (TCBF) was measured, using the microsphere technique, in rats 3 to 24 months old, under basal conditions and after hCG stimulation (...
Inhibition of Spermatogenesis and Steroidogenesis During Long-Term Treatment with hCG in the Rat
hCG spermatogenesis steroidogenesis
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2009/2/19
The effects of chronic treatment with hCG (100 I.U.s.c. every second day) on testicular morphology, LH receptor levels and concentration of steroid intermediates of the 4 and 5 biosynthetic pathwa...
Effects of Hemicastration or hCG-treatment on Steroids in Testicular Vein and Jugular Vein Blood of Stallions
stallion androgens estrogens testicular vein hemicastration hCG-treatment
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2009/2/19
The relationships among testicular vein and jugular vein concentrations of androgens and estrogens were studied in anesthetized stallions. Blood was sampled from a vein on the surface of the testis ...
HCG binding to the testicular LH receptor is similar in fertile, subfertile, and infertile stallions
Fertility horses testis
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2009/2/17
Recent evidence in our laboratory suggests that the cause of idiopathic subfertility/infertility in breeding stallions may originate in the testes at the luteinizing hormone (LH) receptor or postr...
Acute immobilization stress disrupts testicular steroidogenesis in adult male rats by inhibiting the activities of 17 alpha-hydroxylase and 17,20-lyase without affecting the binding of LH/hCG receptors
Stress rats testosterone 17a-hydroxylase
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2009/2/12
We have investigated the effect of acute immobilization (3 hours) stress on testicular steroidogenesis in the adult rat. Immobilization did not alter plasma luteizing hormone (LH) levels, but plas...
Use of a GnRH Agonist and hCG to Obtain an Index of Testosterone Secretory Capacity in the Koala（Phascolarctos cinereus）
Marsupial hormone stimulation test
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2008/12/24
Testosterone secretion in mammals typically occurs in random pulses such that a single blood sample provides limited information on reproductive endocrine status. However, it has been shown in sever...
Production of Beta-HCG by Spermatic Cord Leiomyosarcoma：A Paraneoplastic Syndrome?
Production Beta-HCG Spermatic Cord Leiomyosarcoma Paraneoplastic Syndrome
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2008/12/24
A 28-year-old man presented with a leiomyosarcoma of the spermatic cord after 3 weeks of increasingly painful swelling of the left upper hemiscrotum. The tumor was high-grade, Stage III pT2b N0 M0 (...