To reveal the characterization of interaction between Chinese and western medicinal injections, isothermal titration calorimetry (ITC) was applied to evaluating the interaction of Yiqi Fumai injection (YQFM, as mode drug) with epinephrine hydrochloride injection (YS) and 5% glucose injection (5% GS). The diversification of Gibbs free energy (ΔG), enthalpy (ΔH), and entropy (ΔS) were determined to judge the reaction types of colliquefaction procedures of different injections. Meanwhile, the fingerprints of YQFM before and after combined with the various injections were compared to validate the results. This work demonstrated that during the titration procedure of YQFM and YS, [ΔH] > T [ΔS] , that was to say the reaction was enthalpy-driving. And the reactive profile indicated that a great deal of heat gave out during the procedure. Obviously, chemical reactions happened and the internal component changed. On the other side, the reaction of YQFM combined with 5% GS was entropy-driving, because [ΔH] < T [ΔS]. The reactive profile showed there was only a little heat released. So non-chemical reactions happened and the major ingredients did not change. ITC could be applied to the evaluation on compatibility of other kinds of Chinese and western medicinal injection combination.
Calorimetry ; Drug Interactions ; Drugs, Chinese Herbal ; chemistry ; pharmacology ; Entropy ; Epinephrine ; chemistry ; pharmacology ; Glucose ; chemistry ; pharmacology ; Injections ; Thermodynamics

Calcium ; metabolism ; Calcium Signaling ; Epinephrine ; pharmacology ; Hepatocytes ; drug effects ; metabolism ; Humans

The effect of dexamethasone (10(-5)M) and epinephrine (10(-6)M) on the biosynthesis of metallothionein (MT) in the perfused rat liver was investigated. MT synthesis was determined by measuring the incorporation of 14C-L-aspartic acid into liver MT fraction after the perfusion for five hours of isolated liver by artificial blood containing 14C-L-U-aspartic acid (0.2uci) with dexamethasone or epinephrine. MT was isolated by Sephadex G-75 column chromatography and DEAE Sephadex column chromatography. Incorporation of radioactive 14C into the MT fraction of perfused liver cytosol (9.0grams of liver) from dexamethasone treated, epinephrine treated and control groups were, respective1y, 0.72, 0.34 and 0.33% of total radioactivity infused. Total protein content in the MT fraction of liver perfused with dexamethasone and epinephrine were 0.80, 0.64mg/g liver compared to 0.52mg/g liver in the control. MT, a protein having a high content of cystein and metals is synthesized in the perfused rat liver and its induction is stimulated by dexamethasone, while epinephrine increased the accumulation of Zn in the MT fraction of the perfused rat liver. The present experiment confirms that MT synthesis and degradation are somewhat regulated by glucocorticoid hormone and epinephrine.
Animal ; Dexamethasone/pharmacology* ; Epinephrine/pharmacology* ; Female ; In Vitro ; Liver/drug effects ; Liver/metabolism* ; Metalloproteins/metabolism* ; Metallothionein/metabolism* ; Perfusion ; Rats ; Zinc/metabolism

The influence of thyroxine upon n the cardiac uptake of catecholamines was investigated in rabbits. A single injection of thyroxine(1.0m/kg) into rabbits did not affect the concentration of myocardial catecholamines. However, this dose of thyroxine greatly increased the cardiac uptake of catecholamine following injection of 2.0mg of norepinephrine as compared to that of untreated normal animals and it remained elevated for several hours. Similarly thyroxine also enhanced the accumulation of myocardial catecholamines following administration of dopa(60-80mg/kg) and epinephrine(1.0-1.5mg/kg).
Animal ; Catecholamines/metabolism* ; Epinephrine/metabolism ; Heart/drug effects* ; Male ; Myocardium/metabolism* ; Norepinephrine/metabolism ; Rabbits ; Thyroxine/pharmacology* ; Tritium

Cells, Cultured ; Epinephrine ; adverse effects ; Human Umbilical Vein Endothelial Cells ; drug effects ; ultrastructure ; Humans ; Laminaria ; chemistry ; Polysaccharides ; isolation & purification ; pharmacology ; Protective Agents ; pharmacology

BACKGROUNDEpinephrine has been used as a first-choice vasopressor drug for cardiac arrest (CA) since 1974. However, the administration of epinephrine is controversial. This study aims to compare the effects of Shen-Fu injection (SFI) and epinephrine on resuscitation outcomes in a porcine model of prolonged CA.

METHODSVentricular fibrillation (VF) was electrically induced. After 8 minutes of untreated VF and 2 minutes of chest compressions, 24 pigs were randomly divided into 3 groups (n = 8 per group): central venous injection of SFI (SFI group), epinephrine (EPI group), or saline solution (SA group). The haemodynamic status and oxygen metabolism parameters, including cardiac output, mean arterial pressure, left ventricular dp/dtmax and negative dp/dtmax, oxygen delivery (DO2), and oxygen consumption (VO2), were calculated.

RESULTSSFI shortened the time to restoration of spontaneous circulation (ROSC) and decreased the number of shocks, similar to epinephrine. However, the mean arterial pressure, cardiac output, left ventricular dp/dtmax and negative dp/dtmax were significantly higher in the SFI group than in the EPI group at 4 and 6 hours after ROSC. VO2 and ERO2 decreased after ROSC and then increased. VO2 and ERO2 were significantly higher in the SFI group than in the EPI and SA groups after ROSC, while those were lowest in the EPI group among all groups.

CONCLUSIONSSFI shortened the time to ROSC and decreased the number of shocks, similar to epinephrine. However, SFI improved oxygen metabolism, and produced a better hemodynamic status compared with epinephrine. SFI might be a potentially vasopressor drug for the treatment of CA.

Animals ; Disease Models, Animal ; Drugs, Chinese Herbal ; administration & dosage ; pharmacology ; Epinephrine ; administration & dosage ; pharmacology ; Heart Arrest ; drug therapy ; Injections, Intravenous ; Male ; Resuscitation ; methods ; Swine ; Treatment Outcome

OBJECTIVETo study the effects of catecholamines on human preadipocyte proliferation and differentiation.

METHODSCatecholamines (epinephrine, isoprenaline and noradrenaline) were added to the culture media of human preadipocytes. The proliferation of cells, the expression of GPDH and lipid droplet accumulation in cytoplasm were observed and recorded. The functions of alpha and beta receptors were examined with adding alpha and beta receptor blockers.

RESULTSEpinephrine and isoprenaline stimulated human preadipocyte proliferation and inhibited GPDH up-regulation during differentiation. The three types of catecholamines inhibited lipid accumulation in cell differentiation. The beta-adrenoceptors played a key role during the process.

CONCLUSIONHuman preadipocytes responded to catecholamine characteristically. The result would be applicable in the study of drugs for obesity.

Adipocytes ; cytology ; drug effects ; Catecholamines ; pharmacology ; Cell Differentiation ; drug effects ; Cell Proliferation ; drug effects ; Epinephrine ; pharmacology ; Humans ; Isoproterenol ; pharmacology ; Norepinephrine ; pharmacology ; Obesity ; drug therapy ; Receptors, Adrenergic, beta ; Up-Regulation

Perioperative unilateral mydriasis is a disturbing finding, which is suggestive of acute intracranial pathology during general anesthesia. In addition, the assessment of an abnormal neurological injury is limited during general anesthesia, with anisocoria requiring special consideration. The case of a 27 year old healthy male patient, with ipsilateral mydriasis found near the end of surgery of open reduction for left blow out fracture, was experienced. The patient's pupils were bilaterally equal four hours after uneventfully surgery. The possible causes of unilateral mydriasis include the effects of anesthetic agents, stellate ganglion block, impaired venous return from head and neck, an acute intracranial mass lesion or hemorrhagic event, direct eye trauma, pre-existing medical or surgical conditions (Adie's tonic pupil, artificial eye etc.) and inadvertent direct deposition of alpha-adrenergic or anticholinergic agents in the eye. The understanding and diagnosis of unusual mydriasis during general anesthesia requires knowledge of the autonomic nerve pathways and pharmacology of the eye. In this case, the myadriasis of the left eye was considered to have resulted from the absorption of 1:100.000 topical epinephrine infiltrated into the lower eyelid via episcleral vessels.
Absorption ; Adult ; Anesthesia, General ; Anesthetics ; Anisocoria ; Autonomic Pathways ; Cholinergic Antagonists ; Diagnosis ; Epinephrine ; Eye, Artificial ; Eyelids ; Head ; Humans ; Male ; Mydriasis* ; Neck ; Pathology ; Pharmacology ; Pupil ; Stellate Ganglion ; Tonic Pupil

The purpose of this study was to elucidate the effects of fentanyl and morphine on the ability of epinephrine to induce arrhythmias in halothane-anesthetized dogs. Epinephrine was infused in progressively increasing doses from 0.5 ug/kg/min. Arrhythmogenic dose of epinephrine(ADE), defined as that induces 4 or more premature ventricular contractions within 15 s during 3 min iafusions of epinephrine, was determined before(control) and after pretreatment of either fentanyl(6 ug/kg i.v. plus 6 pg/kg/hr) or morphine(0.2mg/kg i.v. plus 0.2 mg/kg/hr). Blood pressure and heart rate were also measured immediately before(baseline), immediately after infusion of epinephrine. The results were as follows. l) Fentanyl and morphine increased ADE by 37%(2.19+/-0.49 to 3.00+/-0.44 ug/kg/min, p<0.01) and by 43%(2.50+/-0.60 to 3.58+/-0.93 ug/kg/min, p<0.05), respectively. 2) Percent increases in systolic blood pressure at control were similar to those after pretreatment with fentanyl or morphine in both groups, but systolic blood pressures at the time of arrhythmia after pretreatment were lower than those at control in fentanyl(p<0.05) and morphine group(NS). 3) Fentanyl and morphine decreased heart rate by 27%(127+/-8 to 93+/-6 beats/min, p<0.001) and by 13%(118+/-5 to 103+/-5 beats/min, p<0.05), respectively. These results suggest that fentanyl or morphine inhibits epinephrine induced arrhythmias during halothane-oxygen anesthesia. Thus, pretreatment of surgical patients, who were supposed to receive epinephrine during halothane anesthesia, with either fentanyl or morphine might be safe.
Anesthesia ; Anesthetics ; Animals ; Arrhythmias, Cardiac* ; Blood Pressure ; Dogs* ; Epinephrine* ; Fentanyl* ; Halothane* ; Heart ; Heart Rate ; Humans ; Morphine* ; Pharmacology ; Sympathetic Nervous System ; Ventricular Premature Complexes

This study was aimed to assess the effect of Shenfu injection on different circulation state. Using a microcirculation microscope system, we observed mice's auricle micro-artery diameter, density of capillary, blood velocity in different circulation state (i.e. normal state, epinephrine or endotoxin induced microcirculation disturbance state) after administering Shenfu injection into their caudal vein, and we compared the Shenfu group with Shenmai group and Dexamethasone group. The results showed that Shenfu injection causes the auricle microartery diameter to enlarge and the density of capillary and blood velocity to increase in different microcirculation state, and such effect is especially notable on the epinephrine induced microcirculation disturbance group and endotoxin induced microcirculation disturbance group; the effect of Shenfu injection is stronger than that of Shenmai injection and similar to Dexamethasone injection. In addition, Shenfu injection was shown to have remarkable effect on resisting the lowering of limb temperature when the mice are attacked by endotoxin.
Animals ; Blood Flow Velocity ; drug effects ; Drugs, Chinese Herbal ; administration & dosage ; pharmacology ; Ear ; blood supply ; Endotoxins ; toxicity ; Epinephrine ; toxicity ; Female ; Injections ; Male ; Mice ; Microcirculation ; drug effects ; physiology