Biomaterial Database

In vitro effect of cytochalasin B on adrenal steroidogenesis in frog. 1985

P Netchitailo, and I Perroteau, and M Feuilloley, and G Pelletier, and H Vaudry

In order to examine the role of microfilaments in adrenal steroidogenesis, we have studied the effect of cytochalasin B on corticosteroid secretion by frog interrenal tissue in vitro. Perifusion of interrenal fragments with increasing concentrations of cytochalasin B (ranging from 10(-8) to 10(-4) M) led to a dose-related inhibition of corticosterone and aldosterone secretion. Immunohistochemical examination of adrenocortical fragments, using specific anti-actin antibodies, showed that cytochalasin B (5 X 10(-5) M) was responsible for the disappearance of the microfilament network. Administration of 2 consecutive doses of cytochalasin B (5 X 10(-5) M) was responsible for a reproducible and reversible inhibition of corticosteroid secretion. In addition, cytochalasin B (5 X 10(-5) M) totally inhibited the stimulatory effect of angiotensin II, prostaglandin E1 and VIP. It also induced a marked decrease in both ACTH- and dbcAMP-induced stimulation of corticosteroidogenesis. These data indicate that cytochalasin B, which blocked the effect of all adrenal stimulating factors tested, interferes with a late step in the common pathway involved in the response of frog adrenocortical cells to all corticotropic stimuli.

UI	MeSH Term	Description	Entries
D008297	Male		Males
D008841	Actin Cytoskeleton	Fibers composed of MICROFILAMENT PROTEINS, which are predominately ACTIN. They are the smallest of the cytoskeletal filaments.	Actin Filaments,Microfilaments,Actin Microfilaments,Actin Cytoskeletons,Actin Filament,Actin Microfilament,Cytoskeleton, Actin,Cytoskeletons, Actin,Filament, Actin,Filaments, Actin,Microfilament,Microfilament, Actin,Microfilaments, Actin
D011898	Ranidae	The family of true frogs of the order Anura. The family occurs worldwide except in Antarctica.	Frogs, True,Rana,Frog, True,True Frog,True Frogs
D003345	Corticosterone	An adrenocortical steroid that has modest but significant activities as a mineralocorticoid and a glucocorticoid. (From Goodman and Gilman's The Pharmacological Basis of Therapeutics, 8th ed, p1437)
D003571	Cytochalasin B	A cytotoxic member of the CYTOCHALASINS.	Phomin
D000302	Adrenal Cortex	The outer layer of the adrenal gland. It is derived from MESODERM and comprised of three zones (outer ZONA GLOMERULOSA, middle ZONA FASCICULATA, and inner ZONA RETICULARIS) with each producing various steroids preferentially, such as ALDOSTERONE; HYDROCORTISONE; DEHYDROEPIANDROSTERONE; and ANDROSTENEDIONE. Adrenal cortex function is regulated by pituitary ADRENOCORTICOTROPIN.	Cortex, Adrenal
D000305	Adrenal Cortex Hormones	HORMONES produced by the ADRENAL CORTEX, including both steroid and peptide hormones. The major hormones produced are HYDROCORTISONE and ALDOSTERONE.	Adrenal Cortex Hormone,Corticoid,Corticoids,Corticosteroid,Corticosteroids,Cortex Hormone, Adrenal,Hormone, Adrenal Cortex,Hormones, Adrenal Cortex
D000451	Mineralocorticoid Receptor Antagonists	Drugs that bind to and block the activation of MINERALOCORTICOID RECEPTORS by MINERALOCORTICOIDS such as ALDOSTERONE.	Aldosterone Antagonist,Aldosterone Antagonists,Aldosterone Receptor Antagonist,Mineralocorticoid Antagonist,Mineralocorticoid Receptor Antagonist,Aldosterone Receptor Antagonists,Mineralocorticoid Antagonists,Antagonist, Aldosterone,Antagonist, Aldosterone Receptor,Antagonist, Mineralocorticoid,Antagonist, Mineralocorticoid Receptor,Antagonists, Aldosterone,Antagonists, Aldosterone Receptor,Antagonists, Mineralocorticoid,Antagonists, Mineralocorticoid Receptor,Receptor Antagonist, Aldosterone,Receptor Antagonist, Mineralocorticoid,Receptor Antagonists, Aldosterone,Receptor Antagonists, Mineralocorticoid
D000804	Angiotensin II	An octapeptide that is a potent but labile vasoconstrictor. It is produced from angiotensin I after the removal of two amino acids at the C-terminal by ANGIOTENSIN CONVERTING ENZYME. The amino acid in position 5 varies in different species. To block VASOCONSTRICTION and HYPERTENSION effect of angiotensin II, patients are often treated with ACE INHIBITORS or with ANGIOTENSIN II TYPE 1 RECEPTOR BLOCKERS.	Angiotensin II, Ile(5)-,Angiotensin II, Val(5)-,5-L-Isoleucine Angiotensin II,ANG-(1-8)Octapeptide,Angiotensin II, Isoleucine(5)-,Angiotensin II, Valine(5)-,Angiotensin-(1-8) Octapeptide,Isoleucine(5)-Angiotensin,Isoleucyl(5)-Angiotensin II,Valyl(5)-Angiotensin II,5 L Isoleucine Angiotensin II,Angiotensin II, 5-L-Isoleucine
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia