Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: EC:3.4.16.2 (PCP)
 3,761 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

This study examined the effects on PCP binding to BSA by varying the temperature, pH ionic strength, PCP concentration and BSA concentration. It also compared the albumin binding of PCP to the plasma binding of PCP for the rat and human.
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PMID:A study of the inhalation of pentachlorophenol by rats. Part V. A protein binding study of pentachlorophenol. 0 73

Phencyclidine use has been noted to produce a psychosis of several week's duration in a small fraction of users. Descriptions of the premorbid personalities of those who became psychotic resemble descriptions of LSD and marijuana users who experienced prolonged psychiatric difficulty. In addition, the psychosis produced can often be recognized as a "hallucinogen" psychosis. Certain features of the phencyclidine psychosis, namely the neurologic abnormalities, dose-related severity of symptoms, and regularity of the length of illness, are not noted with other psychedelic drugs, leading to the conclusion that PCP psychosis is a drug effect rather than a brief functional psychosis precipitated by the disintegrating PCP experience. However, the infrequent occurrence of psychosis in the (apparently) large exposed population still suggests that this is a combination of drug effect and vulnerable, pathologic personality.
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PMID:Psychiatric sequelae of phencyclidine abuse. 1 Jan 26

The peripheral administration of the psychotomimetic drug phencyclidine (1-(phenylcyclohexyl) piperidine hydrochloride) (PCP) induces a dose-related ipsilateral rotation in unilateral substantia nigra electrolytically-lesioned rats. The intensity of this rotation can be modulated by administration of various dopaminergic and cholinergic agents. Injection of alpha-methylparatyrosine methylester (125 mg/kg) or haloperidol (1 mg/kg) inhibited the ipsilateral circling behavior. Pimozide (1 mg/kg) also inhibitied the rotation, but to a lesser extent. The injection of the anticholinergic agent trihexyphenidyl (5 mg/kg) potentiated, and the cholinomimetic drug arecoline (5 mg/kg), depressed the rotation induced by PCP (7.5 mg/kg), It is probable that PCP possesses significant dopaminergic and anticholinergic properties. The capacity of PCP to induce rotation in this model may be related to its effects on dopaminergic and cholingergic neurons in the rat striatum. Thus, PCP may induce rotational behavior by potentiating dopaminergic transmission, by blocking cholinergic activity, or both; both of these effects have been demonstrated to be important in the generation of circling behavior in rats with nigrostriatal lesions.
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PMID:Phencyclidine-induced rotational behavior in rats with nigrostriatal lesions and its modulation by dopaminergic and cholinergic agents. 1 84

Some properties of mouse spleen cytosol inorgainc pyrophosphatase (PPi-ase) (E. C. 3.6.1.1) as well as the effect of methylene diphosphonic acid (PCP) on the PPi-ase activity were studied. Specific staining for the enzyme PAAG disc-electrophoresis was developed; it was shown that the PPi-ase formed only one band in 7.5% PAAG. The enzyme pH optimum being 8.0, the optimal [Mg++]/[PPi] ratio was about 2; Km =7.7x10(-4) M, Vmax=0.77 mkM. min-1. mg protein-1. PCP was shown to competitively inhibit the pyrophosphatase reaction, Ki=2.5x10(-4) M +/- 0.2x10(-4) M.
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PMID:[Inhibition of mouse spleen inorganic pyrophosphatase by methylene diphosphonic acid]. 1 54

A gas chromatography--mass fragmentography--electron impact (GC-MS-EI) assay of phencyclidine (PCP) was adapted for human plasma and urine. This assay is specific for PCP and very sensitive (approximately 1 ng/ml). Patients with the putative diagnosis of PCP overdosage were studied to correlate plasma and urinary levels with clinical state. Urinary PCP levels were enhanced in an acid urine, which suggests that acidification of the urine is an adjunct in the therapy of PCP overdosage.
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PMID:Effects of urine acidification on plasma and urine phencyclidine levels in overdosage. 2 Feb 61

Knowledge of osmotic pressure has long existed and its practical use in the treatment of patients under intensive care has been widely developed over the past few years following the introduction of simple electronic osmometers. It is related more to plasma albumin than to globulins. It varies in relation with a certain number of physiological factors and in different pathological circumstances. The value of OP and above all of the difference OP--PCP in the prevention, diagnosis, treatment and prognosis of pulmonary oedema has been clearly demonstrated in several recent studies. Its value in relation to total serum proteins is that it takes into account any possible dysproteinaemia and that it is directly expressed in units of pressure which makes possible the calculation of the OP--PCP difference which represents the difference between the only OP--PCP difference which represents the difference between the only two intravascular forces which participate in fluid exchanges at the level of the pulmonary capillary.
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PMID:[Osmotic colloidal pressure: measurement and clinical importance]. 3 8

The metabolism of lindane and its metabolites, gamma-PCCH, PCB, and PCP, has been studied in rats. Urine, faeces, blood and important organs were analyzed for free metabolities and those bound as beta-glucuronides. TeCCOL was identified as a main metabolite by GC/MS and gamma-PCCH has been evaluated toxicologically. A degradation scheme, based on experimental results and comprising only one hypothetical metabolite is proposed and discussed.
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PMID:The metabolism of lindance and its metabolites gamma-2,3,4,5,6-pentachlorocyclohexene, pentachlorobenzene, and pentachlorophenol in rats and the pathways of lindance metabolism. 5 75

Use of phencyclidine is a diverse phenomenon with wide variations in both the amount taken and the frequency of use. There is a large group of persons who have tried PCP once or twice and discontinued using. One of the key distinctions pointed out by this exploratory study relates to the feelings of control persons have over the effects of the drug. The PCP user who is not bothered by the lack of control is more likely to feel good and party with others when using and is more likely to have high use patterns. Feelings of control over the effects of PCP indicate an important individual difference in understanding reactions to PCP use and further research should systematically examine this phenomenon. There has been a discrepancy between our conceptions of PCP use and the actual patterns of use found in the United States. It appears that at this time most persons in the drug abuse field are willing to accept the fact that PCP is a drug of choice among young people and that some as yet unspecified proportion of users is able to use PCP and avoid major problems. While there remains much speculation about the motivation for use and the effects of such use, it would apper that we are ready to engage in research which systematically looks at the spectrum of users.
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PMID:Patterns of phencyclidine use. 10 67

Three squirrel monkeys trained on a variable interval schedule of food presentation were used to examine the interaction between phencyclidine (PCP) and pentobarbital (PB). First, dose-response curves for each drug given alone were obtained. PCP caused small response rate increases at low doses, and a dose-dependent decrease in responding at higher doses. PB caused only dose-dependent decreases in responding. The PB dose-response curve was then redetermined in the presence of four doses of PCP. Little support was found for the hypothesis that PCP enhances the depressant properties of PB. In fact, most dose combinations caused less disruption of responding than expected from simple addition of the effects of each drug given alone. These results are discussed in terms of species differences, measurement of different dipendent variables and rate-dependency.
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PMID:Effects of combinations of phencyclidine and pentobarbital on schedule-controlled behavior in the squirrel monkey. 10 88

To understand the mechanism of the action of ATP on the in vitro transport of the rapidly-labeled RNA from isolated nuclei, the fate of ATP during the incubation as well as the effect of ATP, its analogues and other ribonucleoside triphosphates on the transport was examined and the following results were obtained. (1) More than 97% of added ATP remained acid soluble. No polyadenylation of the rapidly-labeled RNA in the released fraction by added ATP occurred although new polyadenylate segments smaller than 10 S were synthesized. (2) The addition of an ATP-generating system to the reaction mixture restored the initial rate of the release of the rapidly-labeled RNA from isolated nuclei. (3) Among the ribonucleoside triphosphates tested, ATP was most effective in stimulating the release. GTP was about 2/3 as effective as ATP. UTP showed some effect, but CTP showed no effect. EDTA was also non-effective. (4) When no ATP-generating system was added to the reaction mixture, AMP failed to mimic the effect of ATP. However, the combination of AMP and pyrophosphate could take the place of ATP. (5) Both AMP-CPP and AMP-PCP, the ATP analogues, showed the equal degree of their effect on the release, regardless of the position of the methylene bond. From these results, the principal role of ATP in the in vitro transport systems seemed to be its interaction with isolated nuclei to dissociate a structure which retains the rapidly-labeled RNA in the nucleus.
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PMID:The role of ATP in the transport of rapidly-labeled RNA from isolated nuclei of rat liver in vitro. 10 29


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