Biomaterial Database

Steroids and triiodothyronine reduce nerve growth factor concentrations in medium conditioned by L-929 fibroblasts. 1986

K Siminoski, and J Bernanke, and C Kay, and R A Murphy

Thyroid hormone, testosterone, and glucocorticoids stimulate the production of nerve growth factor (NGF) in mouse submandibular glands, but little is known about the influences of these hormones on other sources of NGF. In this study we tested the effects of thyroid hormone and steroids on NGF levels in medium conditioned by L-929 fibroblasts (L-cells), a mouse cell line that secretes NGF in culture. NGF concentrations in conditioned medium were measured by RIA and were normalized for cell number. In the absence of hormones, NGF levels in medium averaged 5.57 ng/ml. T3, cortisone, and aldosterone decreased NGF levels below the sensitivity of the RIA (less than 0.37 ng/ml), with respective ID50 values of 1 X 10(-5), 1 X 10(-8), and 5 X 10(-8) M. Testosterone decreased NGF levels by 66%, with an ID50 of 9 X 10(-9) M, and 17 beta-estradiol decreased it by up to 50%, although the hormone's effects had not plateaued at 10(-6) M. NGF concentrations were unaffected by progesterone at doses as high as 10(-6) M. Cell viability was unaffected by hormone treatment, and the total amount of secreted protein in medium decreased only in cultures treated with high doses of cortisone and aldosterone. Qualitatively similar results were obtained by bioassay; steroids markedly reduced, but did not eliminate, the nerve growth-promoting effects of L-cells on embryonic chick dorsal root ganglia in cocultures. These data indicate that hormones that stimulate NGF production in salivary glands inhibit NGF production by L-cells in culture.

UI	MeSH Term	Description	Entries
D009414	Nerve Growth Factors	Factors which enhance the growth potentialities of sensory and sympathetic nerve cells.	Neurite Outgrowth Factor,Neurite Outgrowth Factors,Neuronal Growth-Associated Protein,Neuronotrophic Factor,Neurotrophic Factor,Neurotrophic Factors,Neurotrophin,Neurotrophins,Growth-Associated Proteins, Neuronal,Neuronal Growth-Associated Proteins,Neuronotrophic Factors,Neurotrophic Protein,Neurotrophic Proteins,Proteins, Neuronal Growth-Associated,Factor, Neurite Outgrowth,Factor, Neuronotrophic,Factor, Neurotrophic,Factors, Nerve Growth,Factors, Neurite Outgrowth,Factors, Neuronotrophic,Factors, Neurotrophic,Growth Associated Proteins, Neuronal,Growth-Associated Protein, Neuronal,Neuronal Growth Associated Protein,Neuronal Growth Associated Proteins,Outgrowth Factor, Neurite,Outgrowth Factors, Neurite,Protein, Neuronal Growth-Associated
D002460	Cell Line	Established cell cultures that have the potential to propagate indefinitely.	Cell Lines,Line, Cell,Lines, Cell
D002642	Chick Embryo	The developmental entity of a fertilized chicken egg (ZYGOTE). The developmental process begins about 24 h before the egg is laid at the BLASTODISC, a small whitish spot on the surface of the EGG YOLK. After 21 days of incubation, the embryo is fully developed before hatching.	Embryo, Chick,Chick Embryos,Embryos, Chick
D003348	Cortisone	A naturally occurring glucocorticoid that has been used in replacement therapy for ADRENAL INSUFFICIENCY and as an anti-inflammatory agent. Cortisone itself is inactive; it is converted in the liver to the active metabolite HYDROCORTISONE. (From Martindale, The Extra Pharmacopoeia, 30th ed, p726)	17-Hydroxy-3,11,20-trioxopregn-4-en-21-yl acetate,Adreson,Cortisone Acetate,Cortone Acetate
D003470	Culture Media	Any liquid or solid preparation made specifically for the growth, storage, or transport of microorganisms or other types of cells. The variety of media that exist allow for the culturing of specific microorganisms and cell types, such as differential media, selective media, test media, and defined media. Solid media consist of liquid media that have been solidified with an agent such as AGAR or GELATIN.	Media, Culture
D005347	Fibroblasts	Connective tissue cells which secrete an extracellular matrix rich in collagen and other macromolecules.	Fibroblast
D005727	Ganglia, Spinal	Sensory ganglia located on the dorsal spinal roots within the vertebral column. The spinal ganglion cells are pseudounipolar. The single primary branch bifurcates sending a peripheral process to carry sensory information from the periphery and a central branch which relays that information to the spinal cord or brain.	Dorsal Root Ganglia,Spinal Ganglia,Dorsal Root Ganglion,Ganglion, Spinal,Ganglia, Dorsal Root,Ganglion, Dorsal Root,Spinal Ganglion
D005938	Glucocorticoids	A group of CORTICOSTEROIDS that affect carbohydrate metabolism (GLUCONEOGENESIS, liver glycogen deposition, elevation of BLOOD SUGAR), inhibit ADRENOCORTICOTROPIC HORMONE secretion, and possess pronounced anti-inflammatory activity. They also play a role in fat and protein metabolism, maintenance of arterial blood pressure, alteration of the connective tissue response to injury, reduction in the number of circulating lymphocytes, and functioning of the central nervous system.	Glucocorticoid,Glucocorticoid Effect,Glucorticoid Effects,Effect, Glucocorticoid,Effects, Glucorticoid
D000450	Aldosterone	A hormone secreted by the ADRENAL CORTEX that regulates electrolyte and water balance by increasing the renal retention of sodium and the excretion of potassium.	Aldosterone, (+-)-Isomer,Aldosterone, (11 beta,17 alpha)-Isomer
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