Date published: 2026-2-14

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PIR1 Activators

PIR1 Activators are a distinct class of chemical compounds that specifically enhance the functional activity of PIR1, a phosphatase involved in RNA processing. These activators typically enhance PIR1 activity through specific signaling pathways that PIR1 is directly involved in, such as the cAMP/PKA pathway and PIP2-associated mechanisms. Adenosine, Isoproterenol, Forskolin, IBMX, Rolipram, Dopamine, Epinephrine, Cilostazol, Alprostadil, and H-89 are compounds that enhance the function of PIR1 through the cAMP/PKA pathway. These compounds increase intracellular cAMP levels, leading to the activation of PKA. PKA, a serine/threonine-specific protein kinase, can phosphorylate and activate PIR1. For instance, Forskolin directly activates adenylate cyclase, which increases cAMP levels and subsequently activates PKA. Similarly, Isoproterenol, a beta-adrenergic agonist, and IBMX, a nonspecific inhibitor of phosphodiesterases, also raise cAMP levels, leading to PKA activation and subsequent phosphorylation of PIR1.

PIP2 and U73122 are compounds that enhance PIR1's function through phospholipase C (PLC) and phosphatidylinositol 4,5-bisphosphate (PIP2) related mechanisms. PIP2 itself is a direct activator of PIR1, and increased PIP2 can bind to and enhance the function of PIR1. U73122 is a selective inhibitor of PLC, and its inhibition can increase PIP2 levels. Since PIR1 can interact with PIP2, increased PIP2 levels can enhancePIR1's function.

SEE ALSO...

Product NameCAS #Catalog #QUANTITYPriceCitationsRATING

Adenosine

58-61-7sc-291838
sc-291838A
sc-291838B
sc-291838C
sc-291838D
sc-291838E
sc-291838F
1 g
5 g
100 g
250 g
1 kg
5 kg
10 kg
$34.00
$48.00
$300.00
$572.00
$1040.00
$2601.00
$4682.00
1
(0)

Adenosine activates adenosine receptors, leading to an increase in the intracellular cAMP levels. High cAMP levels activate PKA, which can phosphorylate and activate PIR1.

Isoproterenol Hydrochloride

51-30-9sc-202188
sc-202188A
100 mg
500 mg
$28.00
$38.00
5
(0)

Isoproterenol is a beta-adrenergic agonist. It increases cAMP levels, which triggers the activation of PKA. PKA can phosphorylate PIR1, enhancing its activity.

Forskolin

66575-29-9sc-3562
sc-3562A
sc-3562B
sc-3562C
sc-3562D
5 mg
50 mg
1 g
2 g
5 g
$78.00
$153.00
$740.00
$1413.00
$2091.00
73
(3)

Forskolin directly activates adenylate cyclase, leading to increased cAMP levels and PKA activation. PKA can phosphorylate and activate PIR1.

IBMX

28822-58-4sc-201188
sc-201188B
sc-201188A
200 mg
500 mg
1 g
$260.00
$350.00
$500.00
34
(1)

IBMX is a nonspecific inhibitor of phosphodiesterases, leading to increased cAMP levels and PKA activation. PKA can phosphorylate and activate PIR1.

Rolipram

61413-54-5sc-3563
sc-3563A
5 mg
50 mg
$77.00
$216.00
18
(1)

Rolipram is a selective phosphodiesterase 4 inhibitor, leading to increased cAMP levels and PKA activation. PKA can phosphorylate and activate PIR1.

Dopamine

51-61-6sc-507336
1 g
$290.00
(0)

Dopamine activates D1-like dopamine receptors, leading to an increase in the intracellular cAMP levels. High cAMP levels activate PKA, which can phosphorylate and activate PIR1.

(−)-Epinephrine

51-43-4sc-205674
sc-205674A
sc-205674B
sc-205674C
sc-205674D
1 g
5 g
10 g
100 g
1 kg
$41.00
$104.00
$201.00
$1774.00
$16500.00
(1)

Epinephrine activates beta-adrenergic receptors, leading to an increase in the intracellular cAMP levels. High cAMP levels activate PKA, which can phosphorylate and activate PIR1.

Cilostazol

73963-72-1sc-201182
sc-201182A
10 mg
50 mg
$109.00
$322.00
3
(1)

Cilostazol is a phosphodiesterase III inhibitor that raises intracellular cAMP, leading to activation of PKA. Increased PKA activity can phosphorylate PIR1, enhancing its function.

PGE1 (Prostaglandin E1)

745-65-3sc-201223
sc-201223A
1 mg
10 mg
$31.00
$145.00
16
(4)

Alprostadil activates prostaglandin E receptors, leading to an increase in the intracellular cAMP levels. High cAMP levels activate PKA, which can phosphorylate and activate PIR1.