Increases in plasma digitalis-like factor activity during insulin-induced hypoglycemia. 1989

S W Graves, and G Adler, and C Stuenkel, and K Sharma, and A Brena, and J Majzoub
Division of Endocrinology and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, Mass.

Digitalis-like factor (DLF) appears to be widely distributed throughout the body, and has been specifically localized to the mammalian hypothalamus. In this study we monitored the DLF response to insulin-induced hypoglycemia in 11 normal males. Hypoglycemia was associated with a significant increase in serum DLF activity over basal values (40 +/- 5 pg digoxin Eq/ml, mean +/- SEM) at 60 min (83 +/- 8 pg digoxin Eq/ml) and 90 min (86 +/- 10 pg digoxin Eq/ml) following insulin administration (p less than 0.01). We measured the DLF response to insulin-induced hypoglycemia in other men after infusion of hypertonic saline (n = 8) or after oral water-loading (n = 8). Saline infusion (0.06 ml 5% saline/kg BW/min for 120 min prior to insulin infusion) or water loading (20 ml/kg BW over 60 min completed 30 min before insulin infusion) alone significantly increased serum DLF (saline: 21 +/- 5 to 60 +/- 18 pg digoxin Eq/ml, p less than 0.05; water: 18 +/- 11 to 49 +/- 15 digoxin Eq/ml, p less than 0.05). DLF activity was further significantly increased within each group 60 and 90 min after administration of insulin. In the group infused with hypertonic saline, insulin caused increases of serum DLF from 60 +/- 18 at time 0 to 170 +/- 17 pg digoxin Eq/ml at peak (p less than 0.01). Similarly, in the oral water-loaded group serum DLF increased from 49 +/- 15 at time 0 to 127 +/- 24 pg digoxin Eq/ml at peak (p less than 0.01) after they received insulin.2=

UI MeSH Term Description Entries
D007003 Hypoglycemia A syndrome of abnormally low BLOOD GLUCOSE level. Clinical hypoglycemia has diverse etiologies. Severe hypoglycemia eventually lead to glucose deprivation of the CENTRAL NERVOUS SYSTEM resulting in HUNGER; SWEATING; PARESTHESIA; impaired mental function; SEIZURES; COMA; and even DEATH. Fasting Hypoglycemia,Postabsorptive Hypoglycemia,Postprandial Hypoglycemia,Reactive Hypoglycemia,Hypoglycemia, Fasting,Hypoglycemia, Postabsorptive,Hypoglycemia, Postprandial,Hypoglycemia, Reactive
D007031 Hypothalamus Ventral part of the DIENCEPHALON extending from the region of the OPTIC CHIASM to the caudal border of the MAMMILLARY BODIES and forming the inferior and lateral walls of the THIRD VENTRICLE. Lamina Terminalis,Preoptico-Hypothalamic Area,Area, Preoptico-Hypothalamic,Areas, Preoptico-Hypothalamic,Preoptico Hypothalamic Area,Preoptico-Hypothalamic Areas
D007328 Insulin A 51-amino acid pancreatic hormone that plays a major role in the regulation of glucose metabolism, directly by suppressing endogenous glucose production (GLYCOGENOLYSIS; GLUCONEOGENESIS) and indirectly by suppressing GLUCAGON secretion and LIPOLYSIS. Native insulin is a globular protein comprised of a zinc-coordinated hexamer. Each insulin monomer containing two chains, A (21 residues) and B (30 residues), linked by two disulfide bonds. Insulin is used as a drug to control insulin-dependent diabetes mellitus (DIABETES MELLITUS, TYPE 1). Iletin,Insulin A Chain,Insulin B Chain,Insulin, Regular,Novolin,Sodium Insulin,Soluble Insulin,Chain, Insulin B,Insulin, Sodium,Insulin, Soluble,Regular Insulin
D008297 Male Males
D011863 Radioimmunoassay Classic quantitative assay for detection of antigen-antibody reactions using a radioactively labeled substance (radioligand) either directly or indirectly to measure the binding of the unlabeled substance to a specific antibody or other receptor system. Non-immunogenic substances (e.g., haptens) can be measured if coupled to larger carrier proteins (e.g., bovine gamma-globulin or human serum albumin) capable of inducing antibody formation. Radioimmunoassays
D001786 Blood Glucose Glucose in blood. Blood Sugar,Glucose, Blood,Sugar, Blood
D001798 Blood Proteins Proteins that are present in blood serum, including SERUM ALBUMIN; BLOOD COAGULATION FACTORS; and many other types of proteins. Blood Protein,Plasma Protein,Plasma Proteins,Serum Protein,Serum Proteins,Protein, Blood,Protein, Plasma,Protein, Serum,Proteins, Blood,Proteins, Plasma,Proteins, Serum
D002298 Cardenolides C(23)-steroids with methyl groups at C-10 and C-13 and a five-membered lactone at C-17. They are aglycone constituents of CARDIAC GLYCOSIDES and must have at least one double bond in the molecule. The class includes cardadienolides and cardatrienolides. Members include DIGITOXIN and DIGOXIN and their derivatives and the STROPHANTHINS. Cardenolide
D004077 Digoxin A cardiotonic glycoside obtained mainly from Digitalis lanata; it consists of three sugars and the aglycone DIGOXIGENIN. Digoxin has positive inotropic and negative chronotropic activity. It is used to control ventricular rate in ATRIAL FIBRILLATION and in the management of congestive heart failure with atrial fibrillation. Its use in congestive heart failure and sinus rhythm is less certain. The margin between toxic and therapeutic doses is small. (From Martindale, The Extra Pharmacopoeia, 30th ed, p666) Digacin,Digitek,Digoregen,Digoxina Boehringer,Digoxine Nativelle,Dilanacin,Hemigoxine Nativelle,Lanacordin,Lanicor,Lanoxicaps,Lanoxin,Lanoxin-PG,Lenoxin,Mapluxin,Boehringer, Digoxina,Lanoxin PG,Nativelle, Digoxine,Nativelle, Hemigoxine
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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