• Title/Summary/Keyword: Effect of drugs

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Antiviral Activity of Papaverine and Nucleoside Analogs on the Human Cytomegalovirus Infection (Human Cytomegalovirus 감염에 대한 파파베린과 뉴클레오사이드 유사체의 항바이러스 효과)

  • ;Albrecht, T.
    • Korean Journal of Microbiology
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    • v.29 no.1
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    • pp.25-33
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    • 1991
  • Antiviral activities of papaverine and nucleoside analogs, 9-[(1,3-dihydroxy-2-propoxy)methyl]guanine (DHPG) and acyclovir, against human cytomegalovirus (HCMV) infection were compared in vitro. Papaverine and DHPG were effective in reducing infectious HCMV yields with $ED_{50}{\s}$ (effective dose 50: the concentraion at which 50% of virus yields was obtained) of approximately 1.02 and $0.45{\mu}{\M}$, respectively; while acyclovir was less effective with an $ED_{50}$ of about $10.4{\mu}{\M}$The relative cytotoxicity of these drugs was evaluated under the same conditions used to measure infectious HCMV yields. Papaverine and DHPG demonstrated little cellular toxicity as measured by their effect on the viability of confluent cells at concentrations in the range of those demonstrating potent inhibition of HCMV replication. Similarly, protein synthesis was largely unaffected by these drugs in stationary mock-infected cells as measured by the incorporation of isotopically labelled amino acids. In contrast, cellular DNA synthesis was invariably reduced in the presence of either drug. HCMV-specific DNA synthesis was also strongly inhibited by papaverine and DHPG.

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Nicotine Addiction: Neurobiology and Mechanism

  • Tiwari, Raj Kumar;Sharma, Vikas;Pandey, Ravindra Kumar;Shukla, Shiv Shankar
    • Journal of Pharmacopuncture
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    • v.23 no.1
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    • pp.1-7
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    • 2020
  • Nicotine, primary component of tobaco produces craving and withdrawal effect both in humans and animals. Nicotine shows a close resemblance to other addictive drugs in molecular, neuroanatomical and pharmacological, particularly the drugs which enhances the cognitive functions. Nicotine mainly shows its action through specific nicotinic acetylcholine receptors located in brain. It stimulates presynaptic acetylcholine receptors thereby enhancing Ach release and metabolism. Dopaminergic system is also stimulated by it, thus increasing the concentration of dopamine in nuclear accumbens. This property of nicotine according to various researchers is responsible for reinforcing behavioral change and dependence of nicotine. Various researchers have also depicted that some non dopaminergic systems are also involved for rewarding effect of nicotinic withdrawal. Neurological systems such as GABAergic, serotonergic, noradrenergic, and brain stem cholinergic may also be involved to mediate the actions of nicotine. Further, the neurobiological pathway to nicotine dependence might perhaps be appropriate to the attachment of nicotine to nicotinic acetylcholine receptors, peruse by stimulation of dopaminergic system and activation of general pharmacological changes that might be responsible for nicotine addiction. It is also suggested that MAO A and B both are restrained by nicotine. This enzyme helps in degradation dopamine, which is mainly responsible for nicotinic actions and dependence. Various questions remain uninsurable to nicotine mechanism and require more research. Also, various genetic methods united with modern instrumental analysis might result for more authentic information for nicotine addiction.

The decocting and taking methods of herbal medicines (전통적인 한약의 전탕법과 복용법에 대한 현대적 고찰)

  • Kim, Yun-Kyung;Kim, Chung-Seok;Cui, Xun
    • Korean Journal of Oriental Medicine
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    • v.10 no.2
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    • pp.63-72
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    • 2004
  • The decocting method of herbal medicines is various with a prescription or herbal medicine's characteristics. But it has common principles by which effective elements can be easily extracted with synergistic actions of herbs and which the therapeutic effect of a medicine is amplified. When decocting a herbal medicine, the volume of water is an important factor. Fire for decocting drugs and decocting time are also important factors. The excessive water and unproper decocting time and temperature can reduce the effect of the decoction. Besides a better decoction can be obtained by squeeze. According to herbal medicine's characteristics and prescription, there are herbs that should be treated after a specific method. For example, decoct first and decoct later. It also affects the therapeutic if a right taking method is not carried out. Methods of taking drugs include both the time and the method. We can confirm these decocting and taking methods in the ancient medical literatures of herbal medicine. This article deals with these things in detail.

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DELTA OPIOID ANALGESICS

  • Burks, Thomas F.
    • Proceedings of the Korean Society of Applied Pharmacology
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    • 1994.04a
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    • pp.50-62
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    • 1994
  • Opium, morphine and rotated natural and synthetic opiates have been used since antiquity, and to the present, for the relief of moderate and severe pain. Morphine and pharmacologically related drugs, however, produced an array of undesired or dangerous side effect that limit their use as analgesics. Prominent among the limiting side effects are constipation, respiratory depression, release of prolactin, and liability for the production of drug dependence. It was our aim to develop, if possible, a drug or class of drugs with analgesic activity similar to that of morphine, but without the serious side effects associated with morphine. Our overall strategy was to take advantage of advancing knowledge concerning multiple types of opioid receptors, to develop ligands selective for the delta type receptors, to determine whether delta receptor agonists offer advantages over mu agonists, then to design compounds with pharmacokinetic properties compatible with practical therapeutic application. All but the last of these objectives have been realized.

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Acute Hepatitis during the Treatment of Postherpetic Neuralgia -A case report- (대상포진후 신경통 치료중 발생한 급성간염 -증례 보고-)

  • Park, Hee-Jeung;Jung, Mi-Hyang;Lee, Cheol-Seong;Kim, Won-Tae
    • The Korean Journal of Pain
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    • v.9 no.1
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    • pp.244-247
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    • 1996
  • A 67 year old male with postherpetic neuralgia complained of right anterior chest throbbing pain and also allodynia. We performed thoracic epidural block with 0.25% bupivacaine and 1% lidocaine. Oral carbamazepine and imipramine were also administred concomitantly. One month later, patient complained of fatigue, anorexia, pruritis, jaundice, and dark urine. Liver function test values were significantly elevated then. Therefore we removed the epidural catheter and ceased all medication. Liver function test values decreased rapidly after discontinuation of medication. Hepatitis might have developed as result of drugs administered and could have been prevented if the patient had been monitored with regular clinical laboratory follow up. The purpose of this case report is emphasize the importance of early regular laboratory test to detect any possible side effect that may occur by administration of drugs during treatment of chronic pain.

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The bibliographical study on drug-processing about Pyritum (자연동(自然銅)의 수치법(修治法)에 대한 문헌적(文獻的) 고찰(考察))

  • Min, Pyoung-gee;Seo, Young-bae
    • Journal of Haehwa Medicine
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    • v.10 no.1
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    • pp.47-53
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    • 2001
  • In the result of investigating traditional chinese medical literatures to understand drug-processing about Pyritum, we could reach conclusions as follows: 1. Pyritum are divided into fresh Pyritum, calcining Pyritum, tempered Pyritum with vinegar by methods of drug-processing. 2. The methods of drug-procession about Pyritum like calcination, quenching, refining drugs with water or medicinal broth of Glycyrrhizae Radix(licorice), boiling with medicinal broth of Glycyrrhizae Radix(licorice) were used complicately. 3. Calcining Pyritum are grinded easily, convenient to apply a pill and powder and As, S are easily removed. Quenching Pyritum act on liver channel and then are reinforced the effects of relieving blood stasis, Pain and gushed out effecive ingredients. Refining Pyritum with water are reinforced the effect of tranquilizing the mind and clearing heat. above results indicates that using calcination, quenching and refining drugs with water together is the best method of drug-processing about Pyritum.

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Spectroscopic investigations on the interaction of bovine serum albumin with amoxicillin and cloxacillin

  • BHALCHANDRA P. KAMAT,
    • Journal of Photoscience
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    • v.12 no.1
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    • pp.11-15
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    • 2005
  • The mechanism of interaction of two drugs viz., amoxicillin and cloxacillin with bovine serum albumin has been investigated using fluorescence absorption and circular dichroism spectroscopy. The quenching mechanism of fluorescence of bovine serum albumin by amoxicillin and cloxacillin was discussed. The binding sites number n and apparent binding constant Kwere measured by fluorescence quenching method. The thermodynamic parameters obtained from data at different temperatures were calculated. The distance r between donor (bovine serum albumin) and acceptor (amoxicillin and cloxacillin) was obtained according to Forster theory of non-radiative energy transfer. The effect of common ions on binding constant was also investigated. The results of synchronous fluorescence spectra, UV-vis absorption spectra and circular dichroism of BSA in presence of amoxicillin and cloxacillin show that the conformation of bovine serum albumin changed

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Anticonvulsant potential of some traditional medicinal plants

  • Asif, Mohammad
    • CELLMED
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    • v.4 no.1
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    • pp.1.1-1.13
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    • 2014
  • Epilepsy has now become the most serious brain disorder. A number of synthetic antiepileptic drugs are available in practice, however their effectiveness does not grip true with the entire population suffering from epilepsy. Traditional systems of medicine are popular in developing countries and most of the population relies on traditional medicines for their primary health care need. Medicinal plants to be an important source of traditional medicines. Various plants are used for the treatment of epilepsy in traditional system of medicines and various plants are yet to be scientifically investigated. Phyto-constituents have been the basis of treatment of human diseases including epilepsy. Herbal products are extensively used for the treatment of many diseases worldwide and where allopathic fails or has severe side effects. Psycho neural drugs are also have very serious side effects like physical dependence, tolerance, deterioration of cognitive function and effect on respiratory, digestive and immune system. So the treatments through herbal medicines are widely used across the world due to their wide applicability and therapeutic efficacy with least side effects, which in turn has accelerated the research regarding natural therapy. In this review we have summarized some herbal anti-epileptics.

Synergic Effect of GamiSamgieum (SGMX) and Lipitor on Hyperlipidemia in Animal Model

  • Park, Hye-Jung;Seol, In-Chan;Son, Chang-Gue
    • The Journal of Korean Medicine
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    • v.30 no.6
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    • pp.103-111
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    • 2009
  • Objectives: To investigate the possibility of GamiSamgieum (SGMX) as a combination therapy with statins on hyperlipidemia using an animal model. Methods: Forty eight ICR mice (male) were divided into six groups of eight mice each: naive, induced, Lipitor 5 mg/kg, Lipitor 5 mg/kg plus SGMX 100 mg/kg, Lipitor 10 mg/kg, and Lipitor 10 mg/kg plus SGMX mg/kg treatment group. Hyperlipidemia was induced by feeding a purified high fat diet for all groups (except naive) along with treatment of drugs for 6 weeks, and then biological parameters were examined on the last experiential day. Results: Lipitor treatment lowered total cholesterol and increased HDL-cholesterol compared to the induced group with no statistical significance. However, co-treatment of SGMX with Lipitor revealed synergic effects on total cholesterol and HDL-cholesterol significantly (P < 0.05) in both. SGMX co-treatment also significantly protected liver tissues from the oxidative stress in liver tissues (P < 0.05) and augmented inhibitory effect of Lipitor against fat accumulation in the body. Conclusion: These results indicate the possibility of that SGMX can be used for patients having hyperlipidemia as a combination therapy with statin drugs.

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