Hormonal Regulation of the Glycogen/Glucose Balance in Xenopus laevis

Occludin and hydromineral balance in Xenopus laevis.

To investigate the response of the tight junction (TJ) protein occludin to environmental change in an anuran amphibian, we examined occludin tissue distribution, immunolocalization and alterations in mRNA expression in African clawed frogs (Xenopus laevis) acclimated to brackish water (BW) conditions (from freshwater to 2 per thousand, 5 per thousand or 10 per thousand salt water). Occludin mRN...

Developmental expression and hormonal regulation of glucocorticoid and thyroid hormone receptors during metamorphosis in Xenopus laevis.

Corticosteroids, the primary circulating vertebrate stress hormones, are known to potentiate the actions of thyroid hormone in amphibian metamorphosis. Environmental modulation of the production of stress hormones may be one way that tadpoles respond to variation in their larval habitat, and thus control the timing of metamorphosis. Thyroid hormone and corticosteroids act through structurally s...

ترتیب اعصای جانبی در دم لارو of Xenopus laevis

Regulation of beta-adrenergic response in Xenopus laevis oocytes.

It has been demonstrated that Xenopus laevis oocytes are sensitive to catechol­ amines. The oocyte response is characterized as being of beta adrenergic nature and is electrophysiologically measured as a transient increase in potassium con­ ductance (hyperpolarizing current in holding potential —40 mV) (VanRenterghem et al.1985).The aim of this paper was to study the decline of the oocyte respo...

Developmental regulation of MCM replication factors in Xenopus laevis

At the midblastula transition (MBT) during Xenopus laevis development, zygotic transcription begins [1], and the rapid, early cleavage cycles are replaced by cell-division cycles that lengthen and acquire G (gap) phases [2] and checkpoints [3-5]. This cell-cycle remodeling may result from either a loss of maternal products, the transcription of zygotic genes, or the replacement of maternal prot...