• Journal of Pharmaceutical Investigation
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• 제16권1호
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• pp.18-23
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• 1986

Anemarrhenae Rhizoma has been clinically used as a sedative drug in oriental medicine. We observed the sedative action and effect on the movement of isolated-ileum with each water extract of Anemarrhenae Rhizoma (F-I), saline solution treated preparation (F-II) and 25% ethanol treated preparation (F-III). The results obtained were summerized as follows; 1) Sedative actions were recognized with F-I, F-II and F-III. 2) Prolonged effect of sleeping time was recognized significantly with F-I, F-II and F-III. 3) Each fraction of Anemarrhenae Rhizoma showed the released action on the isolated-ileum of the mouse, rat, rabbit and guinea pig, and antagonic action against contraction induced by acetylcholine, barium chloride and histamine. Thus the mechanism in the released action of the smooth muscle was partly considered as the direct dependence of the smooth muscle.

• 방사선산업학회지
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• 제10권4호
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• pp.199-204
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• 2016

The dependence of cell survival on exposure dose and the duration of the liquid-holding recovery (LHR) was obtained for diploid yeast cells irradiated with ionizing radiation of different linear energy transfer (LET) and recovering from radiation damage without and with various concentrations of cisplatin - the most widely used anticancer drug. The ability of yeast cells to recover from radiation damage was less effective after cell exposure to high-LET radiation, when cells were irradiated without drug. The increase in cisplatin concentration resulted in the disappearance of this difference whereas the fraction of irreversible damage was permanently enlarged independently of radiation quality. The probability of cell recovery was shown to be constant for various conditions of irradiation and recovery. A new mechanism of cisplatin action was suggested according with which the inhibition of cell recovery after exposure to ionizing radiations was completely explained by the production of irreversible damage.

• 대한수의학회지
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• 제62권1호
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• pp.3.1-3.7
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• 2022

Disulfiram (DSF) is a marketed drug to treat patients with alcohol dependence by inhibiting aldehyde dehydrogenase. Over the last few decades, DSF has been shown to have anticancer effects through different mechanisms. Moreover, this effect can be elevated when used with copper (Cu). Subsequent studies have been conducted on various cancers, but few on lymphoma. This study investigated the anticancer effects of DSF on lymphoma and how this effect changed when treated with Cu. DSF synergistically decreased the metabolic activity of EL4 lymphoma cells when combined with Cu. At 1 µM of DSF alone, the metabolic activity of EL4 cells decreased by 49% compared to the control, whereas it decreased by 87% with a DSF + CuCl₂ treatment. Rhodamine 123 and 2',7'-dichlorofluorescein diacetate staining showed that DSF induced the reduction of the mitochondrial membrane potential and promoted the production of reactive oxygen species. In particular, the combined treatment of DSF + Cu induced cell death based on multiple assays, including annexin V-fluorescein isothiocyanate/propidium iodide staining. Overall, DSF has anticancer effects on lymphoma cells and exhibits synergistic effects when combined with Cu. This study provides some valuable information to broaden the use of DSF in clinics and basic research.

• Molecules and Cells
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• 제26권2호
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• pp.121-130
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• 2008

Methamphetamine, a commonly used addictive drug, is a powerful addictive stimulant that dramatically affects the CNS. Repeated METH administration leads to a rewarding effect in a state of addiction that includes sensitization, dependence, and other phenomena. It is well known that susceptibility to the development of addiction is influenced by sources of reinforcement, variable neuroadaptive mechanisms, and neurochemical changes that together lead to altered homeostasis of the brain reward system. These behavioral abnormalities reflect neuroadaptive changes in signal transduction function and cellular gene expression produced by repeated drug exposure. To provide a better understanding of addiction and the mechanism of the rewarding effect, it is important to identify related genes. In the present study, we performed gene expression profiling using microarray analysis in a reward effect animal model. We also investigated gene expression in four important regions of the brain, the nucleus accumbens, striatum, hippocampus, and cingulated cortex, and analyzed the data by two clustering methods. Genes related to signaling pathways including G-protein-coupled receptor-related pathways predominated among the identified genes. The genes identified in our study may contribute to the development of a gene modeling network for methamphetamine addiction.

• 생물정신의학
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• 제1권1호
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• pp.31-39
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• 1994

Anxiety and anxiety disorders are one of the most common and most serious psychiatric problems. Anti-anxiety drugs are one of the most effective treatment method for these problems. Benzodiazepines have various side-effects and the risk of overuse and abuse. Therefore, physicians should prescribe benzodiazepines carefully. However, they should not be discouraged from prescribing benzodiazepines when they have a knowledge of the pharmacological characteristics of these drugs and there is a clear indication for their use. Generally speaking, problems of benzodiazepine use such as dependence withdrawal symptoms, and cognitive impairment are more likely to occur with high dose, long-term use(more than 4 months), in geriatric patients and patients with a history of alcohol or other sustance abuse. But long-term or high-dose use can be jusified for patients with panic disorder of agoraphobia, and medically-ill patients with persistent anxiety that cannot be otherwise treated. In summary, there cannot be a general prescribing formulation for benzodiazepine use. Physician should always make their decision based on the individual patient's risk/benefit factors.

• 수면정신생리
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• 제7권1호
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• pp.5-9
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• 2000

Several nonpharmacological treatment methods of insomnia and their effects were reviewed. A long-term use of most hypnotics may produce tolerance, dependence, cognitive and psychomotor impairments at daytime, shallow sleep, and rebound insomnia on drug withdrawal. To reduce hypnotic abuse, nonpharmacological strategies have been developed to correct disordered behavioral and cognitive factors. These treatments aim at modifying maladaptive sleep habits, lowering physiological and cognitive arousal levels, and correcting dysfuctional beliefs and attitudes about sleep. These non-pharmacological or cognitive behavior treatments include stimulus control, sleep restriction, relaxation training, sleep hygiene education, cognitive therapy, and light therapy. Among them the stimulus control therapy has been demonstrated most effective as a single treatment or in combination with other treatments. Through nonpharmacological treatments, sleep latency was most significantly reduced and wake time after sleep onset was also reduced. About 50% of insomniacs reported clinical improvements in terms of nearly normalized sleep latency, awakening time, sleep efficiency, and reduction of hypnotic use. Compared to the hypnotic therapy, nonpharmacological treatments are more cost-effective and more readily accepted by patients, and their effects last longer.

• 대한불안의학회지
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• 제1권1호
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• pp.31-36
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• 2005

Benzodiazepine (BDZ) has the possibilities of development of tolerance, withdrawal symptoms, and abuse/addiction, as well as chronically adverse effects. Although many guidelines have proposed the restricted prescription of them, their uses in many psychiatric areas as well as primary practice are still wide spread. So we tried to reappraise the clinical characteristics of BDZ and then to consider the appropriate use. Firstly, meta-analyses on long-term use of BDZ indicated the cognitive impairment, which could be improved after discontinuation of BDZ. Next, there have been some evidences that the long-term use of BDZ does not develop tolerance, contrary to our concern, and maintains good anxiolytic effects. Also, physiological dependence should be discriminated from abuse/addiction, assuming the reality that the risk of BDZ abuse/addiction is surely overestimated. These issues are discussed in detail.

• 수면정신생리
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• 제6권1호
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• pp.5-18
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• 1999

A growing number of people are concerned about their sleep. There are many people with chronic sleep disorders. Sedativehypnotics including benzodiazepine and non-benzodiazepine have been widely used in chronic insomniacs. It is widely accepted that current hypnotics are efficient in alleviating subjective symptoms of insomnia. Non-benzodiazepine hypnotics include zolpidem, zopiclone, and melatonin. These novel non-benzodiazepine hypnotics that have efficacy comparable to benzodiazepines were developed with more understanding of benzodiazepine receptor pharmacology. Their unique pharmacologic profiles may offer few significant advantages in terms of adverse effects of benzodiazepines. However, most of hypnotics including non-benzodiazepine have some of dependence, tolerance, impaired daytime function and rebound insomnia. Currently, it is accepted that combination therapy with pharmacologic and behavioral intervention is the most effective for chronic insomniacs.

• 약학회지
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• 제39권6호
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• pp.593-599
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• 1995

Erythromycin was formulated as enteric-coated pellets in order to reduce degradation in stomach and gastromtestmal irritation, and to maximize the absorption in intestine followmg its oral administration. Core pellets were prepared using fluid-bed granulator with two different methods (powder layering and solvent spraying) and enteric-coated with two different coating polymers (HPMCP and Eudragit E30D). Physical characteristics md dissolution rates of core pellets and enteric-coated pellets were evaluated to optimize the formulation. Powder layering method resulted in shorter initial dissolution time than solvent spraying method, but physicochmical properties of the product were worse than solvent spraying method with respect to hardness, ftiability and density. The dissolution rate of the drug was increased with the addition of surfactants, showing concentration-dependence. The scanning electron microscopic observation of pellets revealed significant differences on the surface appearances prepared with solvent spraying method. The core pellet made with powder layering method had crystals on the surface, which resulted in poor physical properties of the pellets. The dissolution profiles of erythromycin pellets coated with HPMCP or Eudragit L30D were close to that of commercially available erythromycin enteric-coated product.

• Journal of Preventive Veterinary Medicine
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• 제42권4호
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• pp.177-181
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• 2018

Disulfiram is a drug used to treat alcohol dependence. Recent studies have shown that disulfiram also has anti-cancer effects. Considering that many anti-cancer agents have side effects, including immunosuppression, it is important to check if disulfiram has some cytotoxicity to immune cells. In this study, mouse spleen cells were treated with disulfiram and the metabolic activity was measured. Disulfiram increased the cell death of spleen cells according to annexin V-FITC/PI staining analysis. In addition, disulfiram decreased the mitochondrial membrane potential of spleen cells. The toxicity of disulfiram was concentration dependent. Interestingly, disulfiram affected the population of lymphocytes and the subset of spleen cells was altered. This study provides clinicians and researchers with valuable information regarding the toxicity of disulfiram to mouse spleen cells, particularly lymphocytes.