Eikozanoidi Flashcards

1
Q

definicija eikozanoidov

A

parakrini in endokrini hormoni, ki nastanejo iz arahidonske kisline

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2
Q

sinteza eikozanoidov

A

arahidonska kislina se iz membranskega fosfolipida odcepi z encimom fosfolipaza A2, nato se preko različnih reakcij pretvori v eikozanoide

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3
Q

vloge eikozanoidov

A

vloga pri reprodukciji, vnetnih odzivih, vročini, krvnih strdkih, bolečini, izločanju želodčnega soka

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4
Q

razdelitev eikozanoidov

A

1) prostaglandini
2) prostaciklini
3) tromboksani
4) leukotrieni

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5
Q

encimi za sintezo eikozanoidov

A

1) ciklooksigenaza (prostaglandini, pristaciklini, tromboksani)
2) lipooksigenaze (leukotrieni)

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6
Q

prekurzor eikozanoidov razreda 1

A

gama-linolenska kislina

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7
Q

prekurzor eikozanoidov razreda 3

A

EPA

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8
Q

značilna struktura prostaglandinov

A

petčlenski obroč v strukturi

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9
Q

značilna struktura prostaciklinov

A

petčelnski obroč v strukturi z dodatnim furanskim obročem

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10
Q

funkcija PGE2 in PGF2alfa

A

stimulacija krčenja mišic (oba) in zniževanje izločanja želodčnega soka, vnetni odziv (PGE2)

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11
Q

značilna struktura tromboksanov

A

šestčlenski obroč strukturi

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12
Q

delovanju tromboksanov nasprotujejo X

A

X… prostaciklini (preprečujejo agregacijo trombocitov in stimulirajo vazodilatacij

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13
Q

sintezo prostaglandinov in trombnoksanov zavirajo X

A

X… aspirin in NSAID

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14
Q

značilna struktura leukotrienov

A

3 konjugiranje dvojne vezi

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15
Q

bolezensko stanje povezano z leukotrieni

A

prekomerna sinteza lahko povzroči astmatični napad

prekomerna sinteza je tudi povezana s krčenjem gladkih mišic v pljučih in anafilaktičnim šokom

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