RESUMO
A series of four new furoxanopyrimidine derivatives was synthesized and studied with respect to antiulcerous, antisecretory, and antibacterial activity. Two compounds exhibit antiulcerous effect not accompanied (in contrast to the well-known H2 receptor blockers, quiditene, and other antiulcerous drugs) by inhibition of gastric acid secretion. No one of the studied compounds exhibited antibacterial activity in the tests with Helicobacter pylori.
Assuntos
Antiulcerosos/uso terapêutico , Oxidiazóis/farmacologia , Pirimidinas/farmacologia , Úlcera Gástrica/tratamento farmacológico , Animais , Relação Dose-Resposta a Droga , Mucosa Gástrica/efeitos dos fármacos , Mucosa Gástrica/metabolismo , Helicobacter pylori/efeitos dos fármacos , Masculino , Doadores de Óxido Nítrico/farmacologia , Ratos , Úlcera Gástrica/induzido quimicamente , Úlcera Gástrica/fisiopatologiaRESUMO
Quiditene-(qunuclidyl-3)-di-(thyenel-2)carbinole hydrochloride was studied by using various experimental models. The agent was compared with H2-blockers. When gastrically used, quiditene in doses of 5-50 mg/kg dose-dependently decreased gastric acid secretion and prevented acute gastric mucosal lesions. As cimetidine and ranitidine, the agent accelerated chronic gastric ulcer healing. Quiditene has been allowed for clinical studies in Russia.
Assuntos
Antiulcerosos/farmacologia , Mucosa Gástrica/metabolismo , Quinuclidinas/farmacologia , Animais , Antiulcerosos/uso terapêutico , Doença Crônica , Cimetidina/farmacologia , Cimetidina/uso terapêutico , Avaliação Pré-Clínica de Medicamentos , Mucosa Gástrica/efeitos dos fármacos , Camundongos , Quinuclidinas/uso terapêutico , Ranitidina/farmacologia , Ranitidina/uso terapêutico , Ratos , Úlcera Gástrica/induzido quimicamente , Úlcera Gástrica/tratamento farmacológico , Úlcera Gástrica/etiologia , Estresse Fisiológico/complicações , Fatores de TempoRESUMO
The effects of some antiallergic drugs on H1-histamine, 5-HT2-serotonin, and M-cholinoreceptors ligand binding in the rat brain were studied in vitro. Dimedrol, dimebon, and phencarol bonded to H1-receptors: IC50 were 76 +/- 10, 153 +/- 15, 320 +/- 60 nM, respectively. Diazoline and dimebon had some affinity for 5-HT2-receptors, its IC50 was 880 +/- 90 nM. Dimedrol, phencarol and diazoline were found to be active against M-cholinoceptors, but when given in the maximal concentration (10 microM) it acted nonspecifically. In contrast to the other drugs, bicarphen had no effects on the binding of [3H]-mepyramine, [3H]-ketanserine, and [3H]-quinuclidinyl benzylate in the rat brain.
Assuntos
Encéfalo/efeitos dos fármacos , Antagonistas dos Receptores Histamínicos H1/farmacologia , Antagonistas dos Receptores H2 da Histamina/farmacologia , Ketanserina/farmacocinética , Pirilamina/farmacocinética , Quinuclidinil Benzilato/farmacocinética , Animais , Encéfalo/metabolismo , Interações Medicamentosas , Ligantes , Masculino , Ratos , Ratos Sprague-Dawley , Receptores Histamínicos H1/efeitos dos fármacos , Receptores Histamínicos H1/metabolismo , Receptores Histamínicos H2/efeitos dos fármacos , Receptores Histamínicos H2/metabolismo , Receptores Muscarínicos/efeitos dos fármacos , Receptores Muscarínicos/metabolismo , TrítioRESUMO
The effect of an antiallergic (antihistaminic and antiserotonin) drug bicarphen on the functional state of the central nervous system (CNS) was studied. In experiments on animals bicarphen in contrast to dimedrol (diphenhydramine) exerted predominantly the activating effect on CNS (decreased the hypnotic action of barbamyl, enhanced the summation capacity of CNS and the activity of mice in the escape behavioral test, increased the bioelectrical activity of the brain and the activating effect of antidepressants on the EEG).
Assuntos
Sistema Nervoso Central/efeitos dos fármacos , Antagonistas dos Receptores Histamínicos H1/farmacologia , Quinuclidinas/farmacologia , Antagonistas da Serotonina/farmacologia , Animais , Antidepressivos/farmacologia , Encéfalo/efeitos dos fármacos , Encéfalo/fisiologia , Carbazóis/farmacologia , Carbolinas/farmacologia , Difenidramina/farmacologia , Interações Medicamentosas , Eletrofisiologia , Feminino , Masculino , Camundongos , Esforço Físico/efeitos dos fármacos , CoelhosAssuntos
Conjuntivite Alérgica/tratamento farmacológico , Quinuclidinas/uso terapêutico , Rinite Alérgica Perene/tratamento farmacológico , Rinite Alérgica Sazonal/tratamento farmacológico , Ensaios Clínicos como Assunto , Esquema de Medicação , Antagonistas dos Receptores Histamínicos H1/administração & dosagem , Antagonistas dos Receptores Histamínicos H1/uso terapêutico , Humanos , Quinuclidinas/administração & dosagem , Antagonistas da Serotonina/administração & dosagem , Antagonistas da Serotonina/uso terapêutico , U.R.S.S.RESUMO
It was found that the new native antihistamine and antiserotonin drug bicarphen possesses in patients with allergic dermatoses (eczema and neurodermatitis) more active antihistaminic, anti-inflammatory, antipruritic and antiallergic properties than commonly used drugs, particularly in cases with prevalence of exudative and allergic reactions of the immediate type. Normalization of rosette-forming T-lymphocytes and A and G immunoglobulins was essential.
Assuntos
Dermatite Atópica/tratamento farmacológico , Antagonistas dos Receptores Histamínicos H1/uso terapêutico , Quinuclidinas/uso terapêutico , Antagonistas da Serotonina/uso terapêutico , Adolescente , Adulto , Formação de Anticorpos/efeitos dos fármacos , Formação de Anticorpos/imunologia , Dermatite Atópica/imunologia , Avaliação de Medicamentos , Quimioterapia Combinada , Feminino , Humanos , Imunidade Celular/efeitos dos fármacos , Imunidade Celular/imunologia , Masculino , Pessoa de Meia-IdadeRESUMO
The effect of antihistaminics on contractions of the isolated guinea pig ureter was studied. The ureter contractions induced by histamine were prevented by H1-blockers: pipolphen (promethazine), dimedrol (diphenhydramine), phencarol (quifenadine), suprastin (chloropyramine), cyproheptadine and H2-blockers: cimetidine, ranitidine. Electric stimulation-induced contractions were prevented by suprastin. Phencarol, tavegil, cimetidine, ranitidine didn't act on the contractions. The electrically induced contractions were potentiated by pipolphen, dimedrol, cyproheptadine.
Assuntos
Antagonistas dos Receptores Histamínicos H1/farmacologia , Contração Muscular/efeitos dos fármacos , Ureter/efeitos dos fármacos , Animais , Relação Dose-Resposta a Droga , Estimulação Elétrica/métodos , Cobaias , Histamina/farmacologia , Liberação de Histamina/efeitos dos fármacos , Técnicas In Vitro , Ureter/fisiologiaRESUMO
The effect of prazosin on epinephrine-induced contractions of human benign prostatic hyperplasia strips was studied. It was shown that prazosin has a pronounced adrenoblocking activity (EC50 = 5.10(-9) g/ml) but fails to affect strip contractions induced by KCL. It is suggested that prazosin can be used in the treatment of patients suffering from benign prostatic hyperplasia.
Assuntos
Prazosina/uso terapêutico , Hiperplasia Prostática/tratamento farmacológico , Relação Dose-Resposta a Droga , Avaliação Pré-Clínica de Medicamentos , Interações Medicamentosas , Humanos , Técnicas In Vitro , Masculino , Próstata/efeitos dos fármacosAssuntos
Antagonistas dos Receptores Histamínicos H1 , Hipersensibilidade/tratamento farmacológico , Quinuclidinas/uso terapêutico , Animais , Avaliação de Medicamentos , Avaliação Pré-Clínica de Medicamentos , Cobaias , Humanos , Hipersensibilidade/imunologia , Sistema Imunitário/efeitos dos fármacos , Sistema Imunitário/imunologia , Camundongos , Quinuclidinas/farmacologia , Ratos , Relação Estrutura-AtividadeAssuntos
Dermatite Atópica/tratamento farmacológico , Antagonistas dos Receptores Histamínicos H1/uso terapêutico , Quinuclidinas/uso terapêutico , Antagonistas da Serotonina/uso terapêutico , Adolescente , Adulto , Idoso , Ensaios Clínicos como Assunto , Humanos , Hipersensibilidade Tardia/tratamento farmacológico , Hipersensibilidade Imediata/tratamento farmacológico , Pessoa de Meia-Idade , Fatores de TempoRESUMO
Experiments were made to study the influence of a new antihistaminic drug phencarol [(quinuclidyl-3) diphenylcarbinol hydrochloride] on gastric secretion in rats. Unlike the blockers of H1-histamine receptors (diphenhydramine, omeril, pyrilamine, and cyproheptadine), phencarol reduces secretion and the content of free hydrochloric acid in the gastric contents. The antacid activity of the drug is similar to that of the H2-receptor blocker, cimetidine. However, phencarol differs from the latter drug in the mechanism of action. The antacid action of phencarol is likely to be the result of its activation effect on diamine oxidase, which leads to a decrease in the content of active histamine in the tissues and diminution of its supply to H2-histamine receptors that control gastric secretion.
Assuntos
Mucosa Gástrica/metabolismo , Antagonistas dos Receptores Histamínicos H1/farmacologia , Animais , Compostos Benzidrílicos/farmacologia , Carbolinas/farmacologia , Cimetidina/farmacologia , Ciproeptadina/farmacologia , Difenidramina/farmacologia , Masculino , Pirilamina/farmacologia , RatosAssuntos
Quinuclidinas/síntese química , Amina Oxidase (contendo Cobre)/metabolismo , Animais , Compostos Benzidrílicos/uso terapêutico , Compostos Benzidrílicos/toxicidade , Fenômenos Químicos , Química , Histamina/fisiologia , Antagonistas dos Receptores Histamínicos H1/síntese química , Liberação de Histamina/efeitos dos fármacos , Humanos , Cinética , Mastócitos/metabolismo , Parassimpatolíticos/síntese química , Quinuclidinas/farmacologia , Antagonistas da Serotonina/síntese químicaRESUMO
Treatment of bovine brain mitochondrial membranes with iproniazid (Ip) (1 mM, 15 min) inhibited monoamine oxidase (MAO) activity (substrates: 5-hydroxytryptamine, tyramine, dopamine) and significantly (about 7-fold) increased histamine deaminating activity (HDA). A selective inhibitor of MAO-A clorgyline (contrary to deprenyl) prevented the increase in HDA. Ip (200 mg/kg; within 10-16 h after parenteral administration) markedly (about 6-fold) increased the level of the HDA) in brain mitochondria of mice and guinea pigs. At the same time, a decrease in content of histamine (Hi) and increase in content of 5-hydroxytryptamine was noted in the brains of mice. In anesthetized and non-anesthetized guinea pigs Ip decreased (or prevented) the bronchoconstriction and toxic effects caused by Hi. The antihistamine effects of Ip are apparently due to its being able to induce reversible qualitative alteration (transformation) of the catalytic activity of the membrane-bound MAO of type A, which acquires as a result of this transformation potent HDA.
Assuntos
Encéfalo/enzimologia , Mitocôndrias/enzimologia , Monoaminoxidase/metabolismo , Animais , Bovinos , Dopamina/metabolismo , Histamina/metabolismo , Antagonistas dos Receptores Histamínicos/farmacologia , Técnicas In Vitro , Iproniazida/farmacologia , Cinética , Masculino , Camundongos , Serotonina/metabolismo , Tiramina/metabolismoRESUMO
The effect of new antihistaminic drugs, phencarol and bicarphen, on immunologic reactivity of experimental animals was studied in comparison with diphenhydramine. Phencarol and bicarphen inhibited the delayed type allergic reactions to a greater degree than diphenydramine. Unlike diphenhydramine, phencarol and bicarphen injected simultaneously with test-antigen markedly decreased the number of rosette-forming lymphocytes in the immunocompetent organs (spleen, thymus, lymph nodes). Phencarol, bicarphen and diphenhydramine produced the same inhibitory effect on the content of antibody-producing cells in the spleen of mice.
Assuntos
Compostos Benzidrílicos/farmacologia , Difenidramina/farmacologia , Antagonistas dos Receptores Histamínicos H1/farmacologia , Imunidade/efeitos dos fármacos , Imunossupressores , Quinuclidinas/farmacologia , Animais , Formação de Anticorpos/efeitos dos fármacos , Dinitroclorobenzeno , Cobaias , Hipersensibilidade Tardia , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Formação de RosetaRESUMO
The new antihistaminic and antiallergic drug phencarol (quinuclidy-3-diphenylcarbinol hydrochloride) in contradistinction to dimedrol (diphenhydramine) and diprazine (promethazin) exerts no pronounced depressant effect on the central nervous system. It does not significantly influence the period of action of hypnotic drugs, the effects produced by alcohol, spontaneous motor activity, summation capacity of the central nervous system, conditioned reflexes or electroencephalogram. That phencarol possesses no marked central action may be accounted for by its low lipophilic activity and little permeability of the blood brain barrier by this drug.
Assuntos
Compostos Benzidrílicos/farmacologia , Sistema Nervoso Central/efeitos dos fármacos , Antagonistas dos Receptores Histamínicos H1/farmacologia , Quinuclidinas/farmacologia , Animais , Encéfalo/efeitos dos fármacos , Gatos , Depressão Química , Cães , Avaliação Pré-Clínica de Medicamentos , Interações Medicamentosas , Eletroencefalografia , Cobaias , Camundongos , RatosRESUMO
In experiments in vivo, the derivatives of quinuclidylarylcarbinol, possessing an antihistaminic activity, fencarol, its di(o-tolyl)- and di(o-methoxyphenyl)-derivatives activate histamine oxidative deamination by diaminoxidase of the rat lungs and increase the histamine tissue level. Quinuclidyl-3-dithienyl carbinol inhibits the activity of diaminoxidase, but decreases the histamine tissue level. On the contrary, dimedrol (diphenhydramine), pipolfen (promethazin), pyrilamine and cyproheptadin exerted no effect on the activity of diaminoxidase or the histamine tissue level. All the compounds studied did not alter oxidative deamination of the rat brain serotonin by monoamine oxidase or the serotonin content in brain tissues.
Assuntos
Compostos Benzidrílicos/farmacologia , Antagonistas dos Receptores Histamínicos H1/farmacologia , Oxirredutases atuantes sobre Doadores de Grupo CH-NH/metabolismo , Piperidinas/farmacologia , Quinuclidinas/farmacologia , Animais , Encéfalo/efeitos dos fármacos , Desaminação , Ativação Enzimática/efeitos dos fármacos , Histamina/metabolismo , Pulmão/efeitos dos fármacos , Masculino , Psicotrópicos/farmacologia , Ratos , Serotonina/metabolismo , Fatores de TempoAssuntos
Hipersensibilidade/tratamento farmacológico , Quinuclidinas/uso terapêutico , Adolescente , Adulto , Idoso , Compostos Benzidrílicos/uso terapêutico , Ensaios Clínicos como Assunto , Avaliação de Medicamentos , Feminino , Hipersensibilidade Alimentar/tratamento farmacológico , Humanos , Masculino , Pessoa de Meia-Idade , Perfumes/efeitos adversos , Hipersensibilidade Respiratória/tratamento farmacológico , Rinite Alérgica Sazonal/tratamento farmacológicoRESUMO
Phenothiazines (chlorpromazine and promethazine) and antihistaminic quinuclidine derivatives [phencarol, quinuclidyl-3-di-(o-tolyl) carbinol, hydrochloride quinuclidyl-3-di-(o-methoxyphenyl) carbinol--HQMC] at concentrations preceding the histamine-releasing ones inhibited the compound 48/80-induced histamine release from the isolated rat mast cells. HQMC inhibited histamine release induced by selective liberators (compound 48/80, MCD-peptide, specific antigen), but potentiated histamine release induced by nonselective liberators (chlorpromazine, tryton X-100). The inhibition by HQMC of histamine release induced by compound 48/80 increased during 1 min and was reversible. The inhibitory effect of all the compounds tested was partially counteracted by glucose.
Assuntos
Antagonistas dos Receptores Histamínicos/administração & dosagem , Antagonistas dos Receptores Histamínicos H1/farmacologia , Liberação de Histamina/efeitos dos fármacos , Mastócitos/efeitos dos fármacos , Quinuclidinas/farmacologia , p-Metoxi-N-metilfenetilamina/antagonistas & inibidores , Animais , Compostos Benzidrílicos/farmacologia , Clorpromazina/farmacologia , Interações Medicamentosas , Feminino , Mastócitos/metabolismo , Peptídeos/farmacologia , Polietilenoglicóis/farmacologia , Prometazina/farmacologia , RatosRESUMO
As evidenced no less than 45 per cent of tritium-labelled antihistaminic drug phencarol (quinuclidine-3-diphenylcarbinol hydrochloride) introduced intragastrically to rats is absorbed. The maximal radioactivity in various organs is reached in 1--3 hours, with high specific radioactivity being recorded in the lungs and liver and low--in the brain. The drug or radioactive products of its tranformation are eliminated largely via the gastrointestinal tract and kidneys.