Chimie Antihistaminiques Flashcards

1
Q

Rcpt de l’histamine sont quel type ? (h1,2,3,4)

A

Métabo

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2
Q

Effets biologiques du rcpt H1?

A
  • Vasodilatateur
  • Bronchoconstricteur
  • Augm. perméabilité (oedème)
  • Dim. conduction auriculoventriculaire
  • contraction m. lisse gastrique
  • stimulation nerf périphériques (cutanés) –> dlr + démangeaisons
  • SNC effets excitateurs (contrôle du sommeil (éveil))
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3
Q

Distribution du rcpt H1 (3)

A
  • musculature lisse
  • endothélium
  • SNC
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4
Q

Distribution H2

A

muqueuse gastrique, m. cardiaque, mastocyte, cerveau

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5
Q

Effets bio. H2

A
  • contrôle sécrétion gastrique
  • -augm. sécrétions bronchiques
  • relax. m. lisses vasculaires
  • tachycardie, inotrope +, chronotrope +
  • ralentit chimiotaxie des éosinophiles + neutrophiles
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6
Q

Distribution du rcpt H3

A

neurones présynaptiques du SNC + plexus myentérique

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7
Q

Distribution du rcpt H4

A

éosino, neutro et lympho T CD4

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8
Q

effets bio H3

A

autorcpt –> module (diminue) synthèse + libération histamine

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9
Q

effets bio H4

A

libération cytokines ds processus infla., augm. chimiotaxie

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10
Q

comment se comporte les antihistaminiques sur les rcpt H1

A

agonistes inverses

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