Related Experiment Video
Updated: Jul 11, 2026

Biochemical Reconstitution of Steroid Receptor•Hsp90 Protein Complexes and Reactivation of Ligand Binding
Published on: September 21, 2011
Regulation of hydrocortisone binding sites by hydrocortisone in human bone marrow fibroblasts
Abstract:
The incubation of human bone marrow fibroblasts with hydrocortisone (10(-7) M) produces a time-dependent depletion of hydrocortisone-binding sites. This effect is glucocorticoid-specific, since glucocorticoid agonists cause depletion to the same extent as hydrocortisone. After withdrawal of the hormone from the incubation medium, cells are able to replenish their complement of receptor. The existence of this down-regulation process may represent a protective mechanism against the partial proliferative inhibitory action of glucocorticoids for bone marrow fibroblasts and also a stimulus for differentiation to adipocytes.
Related Concept Videos
Regulation of Hematopoietic Stem Cells
Drug Distribution: Tissue Binding
For...
Target Cell Response to Hormones
Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...
Hormones of the Adrenal Glands
The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and corticosterone...
Drug Binding to Blood Components
HSA is the most abundant plasma protein and is vital in drug binding. It contains distinct drug-binding sites, with different drugs exhibiting affinity for specific sites. There are three main drug-binding domains for HSA: sites I, II, and III. These domains are further...
Cushing Syndrome II: Pathophysiology

