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DƯỢC LÍ Goodman & Gilman's The Pharmacological Basis of Therapeutics 12th, 2010

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Table 14–10

Characteristics of Purinergic Receptors

CLASS

P1

(adenosine) A 1

A 2A

A 2B

A 3

RECEPTOR SUBTYPE

Transducer G i

G s

G s

G i

Agonists CPA CGS21680 1B-MECA

Antagonists CPX SCH58261 MRS-1754

P2X

(ionotropic) P2X 1

P2X 2

P2X 3

P2X 4

P2X 5

P2X 6

P2X 7

Substrate Specificity ATP>ADP ATP ATP ATP>CTP ATP unknown ATP

Antagonist NF449 NF279 TNP-ATP protons PPADS none known Brilliant Blue G

P2Y

(metabotropic) P2Y 1

P2Y 2

P2Y 4

P2Y 6

P2Y 11

P2Y 12

P2Y 13

P2Y 14

Transducer G q

G q

, G i

G q

, G i

G q

G q

G i

G i

G i

Substrate specificity ADP, ATP, ATP=UTP UTP>ATP UDP ATP>ADP ADP ADP UDP-glucose a

ApoA

a

P2Y 14

binds UDP-glucose, UDP-galactose, and/or UDP-acetylglucosamine.

NECA is a non-selective agonist of P1 receptors.

CPA, N6-cyclopentyladenosine; CPX, 8-cyclopentyl-1,3-dipropylxanthine; 1B-MECA, N6-(3-iodobenzyl)-adenosine-5α-N-methylcarboxamide; NECA, 1-(6-amino-9H-purin-9-yl)-1-deoxy-Nethyl-β-D-ribofuronamide;

PPADS, Pyridoxalphosphate-6-azophenyl-2',4'-disulfonic acid; TNP-ATP, 2',3'-O-(2,4,6-trinitrophenyl)adenosine-5'-triphosphate.

CHAPTER 14

NEUROTRANSMISSION AND THE CENTRAL NERVOUS SYSTEM

391

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