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

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COOH

943

O

O

HO

O

HO

11–hydro–TxB 2

dehydrogenase

OH

O

OH

O

HO

O

O

OH

O

OH

11–dehyrdo–TxB 2

PGE 2

COOH

COOH

COOH

PGl

COOH

2

TxA 2

OH OH OH

OH

HO

HO

HO

HO

non–enzymatic

hydrolysis

COOH

TxB 2

β oxidation

OH

COOH

HO

O

2 , 3–dinor–TxB

OH

2

HO

COOH

O

OH PGD 2

COOH

PGF

OH

O

COOH

O

prostaglandin

dehydrogenase

Δ 13 reduction

β oxidation

ω oxidation

OH

OH

OH

HO

HO

HO

HO

OH

O

O

11–keto

reductase

OH

OH

OH

O

non–enzymatic

hydrolysis

COOH

COOH

6–keto PGF 1α

β oxidation

2 , 3–dinor–

6–keto–PGF 1α

COOH

9α , 11β–PGF 2

COOH

COOH

CHAPTER 33

LIPID-DERIVED AUTACOIDS: EICOSANOIDS AND PLATELET-ACTIVATING FACTOR

O

COOH

COOH

HO

COOH

COOH

COOH

HO O PGE–M HO O PGF–M HO O PGD–M

Figure 33–3. Major pathways of prostanoid degradation. Active metabolites are shaded in gray. Major urinary metabolites are shaded

in orange. The red dashed lines indicate reactions that use common enzymatic processes. M, metabolite. See the text for other abbreviations.

HO

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