RESUMO
The effects of some antineoplastic drugs (vincristine, doxorubicin and epirubicin) on collagen- and ADP-induced human platelet aggregation are investigated. Platelet rich plasma (PRP) and platelet poor plasma (PPP) from healthy male and female donors were used. The PRP was adjusted with analogous PPP to 300,000 platelets/microliters. Platelet aggregation was studied according to Born's turbidimetric technique using an Aggrecorder II PA 3220 with collagen at a concentration of 10 micrograms/ml and ADP at a concentration of 30 microM. Vincristine, doxorubicin and epirubicin significantly (p < 0.01) inhibited collagen- and ADP-induced platelet aggregation. The vincristine induced inhibition was higher than that induced by doxorubicin or epirubicin. The effects of doxorubicin and epirubicin were more intense on ADP-induced platelet aggregation than on the collagen induced one. Moreover, the doxorubicin inhibition of ADP-induced platelet aggregation was greater than the epirubicin one. In conclusion, our study shows that vincristine, doxorubicin and epirubicin inhibit human platelet aggregation. The present results may improve the therapeutic use of these drugs since it has been clearly shown that drugs with antiplatelet activity could block metastases.
Assuntos
Doxorrubicina/farmacologia , Epirubicina/farmacologia , Inibidores da Agregação Plaquetária/farmacologia , Agregação Plaquetária/efeitos dos fármacos , Vincristina/farmacologia , Difosfato de Adenosina/farmacologia , Antineoplásicos/farmacologia , Colágeno/farmacologia , Feminino , Humanos , Masculino , Concentração OsmolarRESUMO
The synthesis of some N,N-disubstituted 4-amino-5,6,7,8-tetrahydro-3,6- diphenyl-2H-1-benzopyran-2-ones by reaction of phenylchloroketene with a series of N,N-disubstituted 2-aminomethylene-4-phenylcyclohexanones, followed by dehydrochlorination in situ of the primary adducts with DBN, is described. Some compounds showed a platelet antiaggregating activity in vitro superior or comparable to that of acetylsalicylic acid and an appreciable antiarrhythmic activity, as well as weak anti-inflammatory and local anesthetic activities in rats and mice.
Assuntos
Benzopiranos/síntese química , Inibidores da Agregação Plaquetária/síntese química , Aconitina/farmacologia , Anestésicos Locais/síntese química , Anestésicos Locais/farmacologia , Animais , Antiarrítmicos/síntese química , Antiarrítmicos/farmacologia , Anti-Inflamatórios não Esteroides/síntese química , Anti-Inflamatórios não Esteroides/farmacologia , Benzopiranos/farmacologia , Carragenina , Cicloexanos/química , Edema/induzido quimicamente , Edema/prevenção & controle , Humanos , Técnicas In Vitro , Espectroscopia de Ressonância Magnética , Camundongos , Inibidores da Agregação Plaquetária/farmacologia , Ratos , Espectrofotometria Infravermelho , Espectrofotometria UltravioletaRESUMO
The synthesis of a series of N-substituted 4-carboxy-1-phenyl-1H-pyrazole-5-propanamides by reaction of 1-phenyl-1H-oxepino[4,3-c]pyrazole-4(8H),6(7H)-dione with aromatic primary amines is described. Some amides showed a platelet antiaggregating activity in vitro superior or comparable to that of acetylsalicylic acid, as well as moderate antiinflammatory, analgesic and antipyretic activities in rats or mice.
Assuntos
Amidas/síntese química , Anti-Inflamatórios não Esteroides/síntese química , Inibidores da Agregação Plaquetária/síntese química , Pirazóis/síntese química , Amidas/farmacologia , Animais , Anti-Inflamatórios não Esteroides/farmacologia , Temperatura Corporal/efeitos dos fármacos , Humanos , Técnicas In Vitro , Camundongos , Agregação Plaquetária/efeitos dos fármacos , Inibidores da Agregação Plaquetária/farmacologia , Pirazóis/farmacologia , RatosRESUMO
A series of N-acyl-4,7,7-trimethyl-N-phenyl-3-(1-piperidinyl or dimethylamino)bicyclo[2.2.1]hept-2-ene-2-carbothioamides was prepared in excellent yields by reaction of 4,7,7-trimethyl-N-phenyl-3-(1-piperidinyl or dimethylamino)bicyclo[2.2.1]hept-2-ene-2-carbothioamides with a number of aromatic or heterocyclic acyl chlorides in dry pyridine solution and in the presence of sodium hydride. Some of the above compounds showed a platelet antiaggregating activity in vitro superior or comparable to that of acetylsalicylic acid; moreover, some compounds exhibited moderate analgesic, antiinflammatory and hypotensive activities in mice or rats.
Assuntos
Compostos Bicíclicos com Pontes/síntese química , Piperidinas/síntese química , Inibidores da Agregação Plaquetária/síntese química , Tioamidas/síntese química , Acetilcolina/antagonistas & inibidores , Animais , Anti-Inflamatórios não Esteroides/síntese química , Anti-Inflamatórios não Esteroides/farmacologia , Anti-Hipertensivos/síntese química , Anti-Hipertensivos/farmacologia , Compostos Bicíclicos com Pontes/farmacologia , Cobaias , Antagonistas dos Receptores Histamínicos H1/síntese química , Antagonistas dos Receptores Histamínicos H1/farmacologia , Humanos , Técnicas In Vitro , Camundongos , Piperidinas/farmacologia , Inibidores da Agregação Plaquetária/farmacologia , Ratos , Tioamidas/farmacologiaRESUMO
The syntheses of 1-(2-hydroxypropyl)-3,5-diphenyl-1H-pyrazole 1 by reaction of 1-hydrazino-2-propanol with dibenzoylmethane and of N-substituted 1-(2-aminopropyl)-3,5-diphenyl-1H-pyrazoles 3 by reaction of primary and secondary amines with the tosylate of 1, as well as of N-substituted 1-(3-amino-2-hydroxypropyl)-3,5-diphenyl-1H-pyrazoles 6 starting from 3,5-diphenyl-1H-pyrazole, are described. Some compounds 3 and 6 showed remarkable antiinflammatory activity in rats, as well as weak analgesic, antipyretic, antiarrhythmic, hypotensive activities in mice and rats and moderate platelet antiaggregating effects in vitro.
Assuntos
Anti-Inflamatórios não Esteroides/síntese química , Pirazóis/síntese química , Animais , Antiarrítmicos/síntese química , Antiarrítmicos/farmacologia , Anti-Inflamatórios não Esteroides/farmacologia , Anti-Hipertensivos/síntese química , Anti-Hipertensivos/farmacologia , Humanos , Técnicas In Vitro , Masculino , Camundongos , Atividade Motora/efeitos dos fármacos , Inibidores da Agregação Plaquetária/síntese química , Inibidores da Agregação Plaquetária/farmacologia , Pirazóis/farmacologia , RatosRESUMO
The synthesis of some N,N-disubstituted 4-amino-6,7,8,9-tetrahydro-3-phenylcyclohepta[b]pyran-2(5H)-ones by reaction of phenylchloroketene with a series of N,N-disubstituted 2-aminomethylenecycloheptanones, followed by dehydrochlorination of the primary adducts with DBN, is described. Some compounds showed a platelet antiaggregating activity in vitro superior or comparable to that of acetylsalicylic acid, as well as weak local anesthetic, antiinflammatory and analgesic activities in mice and rats.
Assuntos
Inibidores da Agregação Plaquetária/síntese química , Piranos/síntese química , Analgésicos/síntese química , Analgésicos/farmacologia , Anestésicos Locais/síntese química , Anestésicos Locais/farmacologia , Animais , Antiarrítmicos/síntese química , Antiarrítmicos/farmacologia , Anti-Inflamatórios não Esteroides/síntese química , Anti-Inflamatórios não Esteroides/farmacologia , Fenômenos Químicos , Físico-Química , Humanos , Técnicas In Vitro , Camundongos , Inibidores da Agregação Plaquetária/farmacologia , Piranos/farmacologia , RatosRESUMO
Endotoxins may interfere with platelet aggregation by interacting with the platelet membrane. The aim of this study was to evaluate the effects of tetanus toxin, Salmonella typhimurium porin, and bacterial lipopolysaccharide (LPS) on platelet aggregation induced by ADP and thrombin in vitro. Spontaneous platelet aggregation and platelet aggregation induced by ADP and thrombin were measured. Our results show that Salmonella typhimurium porin and bacterial LPS enhanced human and rabbit platelet aggregation induced by ADP and thrombin. Tetanus toxin did not affect platelet aggregation.
Assuntos
Proteínas da Membrana Bacteriana Externa/farmacologia , Lipopolissacarídeos/farmacologia , Agregação Plaquetária/efeitos dos fármacos , Salmonella typhimurium , Toxoide Tetânico/farmacologia , Animais , Feminino , Humanos , Masculino , Porinas , CoelhosRESUMO
The synthesis of esters derived from 7-(diphenylmethylene)bicyclo[2.2.1]heptan-2-endo-ol, obtained by LiAlH4 reduction of 7-(diphenylmethylene)bicyclo[2.2.1]heptan-2-one, is described. Some of these esters showed an appreciable antiarrhythmic activity in rats, as well as moderate hypotensive and local anesthetic activities in rats and mice, respectively.
Assuntos
Antiarrítmicos/síntese química , Norbornanos/síntese química , Aconitina/farmacologia , Anestesia , Anestésicos Locais/síntese química , Anestésicos Locais/farmacologia , Animais , Antiarrítmicos/farmacologia , Arritmias Cardíacas/induzido quimicamente , Arritmias Cardíacas/prevenção & controle , Pressão Sanguínea/efeitos dos fármacos , Ésteres , Frequência Cardíaca/efeitos dos fármacos , Humanos , Espectroscopia de Ressonância Magnética , Camundongos , Norbornanos/farmacologia , Ratos , Tempo de Reação/efeitos dos fármacos , Espectrofotometria InfravermelhoAssuntos
Anti-Inflamatórios não Esteroides , Compostos Heterocíclicos/farmacologia , Imidazóis/farmacologia , Animais , Temperatura Corporal/efeitos dos fármacos , Carragenina , Bovinos , Edema/induzido quimicamente , Edema/tratamento farmacológico , Mucosa Gástrica/efeitos dos fármacos , Cavalos , Técnicas In Vitro , Camundongos , Medição da Dor , RatosRESUMO
The synthesis of some N,N-disubstituted 4-amino-3-phenyl-2H,5H-[1]benzothiopyrano [4,3-b]pyran-2-ones by reaction of phenylchloroketene with a series of N,N-disubstituted 3-aminomethylene-2,3-dihydro-4H-1-benzothiopyran-4-ones, followed by dehydrochlorination of the primary adducts with DBN, is described. Some of these compounds showed a strong platelet antiaggregating activity in vitro, superior to that of acetylsalicylic acid.