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Effects of insulin-like growth factor-I on androgen production by highly purified pubertal and adult rat Leydig cells
Somatomedin-C development steroidogenesis
2009/2/10
Leydig cells were isolated and purified from adult and midpubertal rats to study the effects of insulin-like growth factor-I (IGF-I) on steroidogenesis. Androgen production, as measured in Leydig ce...
Experimental cryptorchidism in the adult mouse. III. Qualitative and quantitative electron microscopic morphology of Leydig cells
Experimental cryptorchidism adult mouse Leydig cells
2009/2/7
The morphology of Leydig cells of control and 28-day-old cryptorchid mice was studied by electron microscopy and stereologic techniques. Leydig cell profiles of control mice were larger in section...
In this study, Leydig cells in mitosis in adult guinea pigs were quantified. Testes of adult control guinea pigs (n = 10) were fixed by whole body perfusion with 2.5% glutaraldehyde in cacodylate bu...
Effects of follicular fluid administration on serum bioactive and immunoreactive FSH concentrations and compensatory testosterone secretion in hemicastrated adult rats
Rat hemicastration follicle-stimulating hormone(FSH) testosterone inhibin
2009/2/7
In adult rats, removal of one testis (hemicastration) results in an elevation of serum follicle-stimulating hormone (FSH) concentrations and a compensation in testosterone secretion by the remain...
Experimental cryptorchidism in the adult mouse：II. A hormonal study
Leydig cells FSH LH testosterone hCG radioimmunoassay
2009/2/6
Serum follicle-stimulating hormone (FSH), luteinizing hormone (LH), and testosterone levels and secretory capacity of the in vitro stimulated testis were determined in control and bilateral cryptorc...
Experimental cryptorchidism in the adult mouse：I. Qualitative and quantitative light microscopic morphology
Testis Leydig cells stereology hyperplasia,hypotrophy
2009/2/6
Morphologic changes in the testes of adult mice after experimentally induced cryptorchidism were studied by light microscopy and stereology. Increasing duration of cryptorchidism resulted in a gradu...
Effects of hypophysectomy and alterations in spermatogenic function on Leydig cell volume, number, and proliferation in adult rats
Pituitary spermatogenesis luteinizing hormone Leydig cell proliferation
2009/2/6
The two major objectives of this study were to determine (i) whether the pituitary is required to maintain Leydig cell number per testis, and (ii) whether alterations in spermatogenic function in ...
Tumor necrosis factor and interleukin-1 stimulate testosterone secretion in adult male rat Leydig cells in vitro
umor necrosis factor interleukin-1 testis testosterone
2009/2/6
The actions of two cytokines, tumor necrosis factor (TNF) and interleukin-1 (IL-1), on testosterone production by dispersed adult testis cells and purified Leydig cells in culture were studied. In o...
The aims of this study were to differentially identify peroxisomes and lysosomes in Leydig cells of the sexually mature rat using cytochemical techniques, to describe the size and shape of peroxisom...
cAMP response of cultured Sertoli cells from immature and adult hamsters. Effect of hypophysectomy and cryptorchidism
cultured Sertoli cells immature and adult hamsters hypophysectomy cryptorchidism
2009/2/6
The ability of FSH to stimulate cAMP accumulation in Sertoli cells cultured from either hamsters or rats declines with the age of the animal. Hypophysectomy or bilateral cryptorchidism of immature r...
Space closure in adult patients using the segmented arch technique
Space closure Bony loss Moment to force ratio Retraction
2009/1/23
Periodontally compromised adult patients may benefit from modified appliance designs for space closure. TMA T-loops of .016 × .022 and .017 × .025 cross sections, with angulations incorporated via...
The morphologic structure of the openbite in adult Taiwanese
Anterior openbite Adult Taiwanese Quadrilateral analysis
2009/1/9
Anterior openbite (AOB) is an intricate occlusal problem. Treatment of AOB is one of the most challenging tasks in orthodontics. An ethnic-specific norm for craniofacial skeletal patterns would be v...
The effect of premolar extractions on the soft-tissue profile in adult African American females
African American Bimaxillary protrusion Extraction Soft tissue profile
2009/1/8
The present study was designed to evaluate the effect of four first premolar extractions on the soft tissue profile in African American patients. Pretreatment and posttreatment cephalograms of 28 ad...
The role of computerized video imaging in predicting adult extraction treatment outcomes
Video image prediction Adult extraction treatment
2009/1/8
The purpose of this study was to evaluate the accuracy of computerized video imaging in predicting the soft tissue outcome of extracting four premolars in adults. The pretreatment and posttreatmen...
Leydig cell cooperation in vitro：evidence for communication between adult rat Leydig cells
rat adult Leydig cells in vitro cooperation autocrine
2009/1/5
In short-term incubations (32 C, 3 h) of purified adult rat Leydig cells, increasing the density from 5000 to 50,000 cells/16 mm diameter culture well caused a significant increase in human chorioni...