Which arrestin is required for activation of phosphorylation of MDM2 during chronic Iso stimulation? use the following Figures 1and 2 respectively to explain please

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Author:Matthew Douglas, Jung Choi, Mary Ann Clark
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Chapter16: Gene Expression
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Which arrestin is required for activation of phosphorylation of MDM2 during chronic Iso stimulation?

use the following Figures 1and 2 respectively to explain please

 

a
IP:
b
IgG ARRB1
GST
WB:p53
WB:ARRB1
GST-ARRB1
WB:GST
WB:p53
GST-
ARRB1
GST
Nucleus
ARRB1
Iso
ARRB1
IP:MDM2
+
p53
Merged
WB:p53
WB:MDM2
IP:MDM2
Lysate
Iso
IP:MDM2
Lysate
IP:MDM2
Lysate
pcDNA
Arrb1
WB:p53
Arrb1-
Q394L
WB:p53
WB:p53
WB:MDM2
WB:ARRB1
WT
Arrb1-1-
Transcribed Image Text:a IP: b IgG ARRB1 GST WB:p53 WB:ARRB1 GST-ARRB1 WB:GST WB:p53 GST- ARRB1 GST Nucleus ARRB1 Iso ARRB1 IP:MDM2 + p53 Merged WB:p53 WB:MDM2 IP:MDM2 Lysate Iso IP:MDM2 Lysate IP:MDM2 Lysate pcDNA Arrb1 WB:p53 Arrb1- Q394L WB:p53 WB:p53 WB:MDM2 WB:ARRB1 WT Arrb1-1-
y-H2AX (arbitrary units)
2.5
2.0
1.5
1.0
0.5.
0
DNA damage
Mouse thymus
Iso
LY294002-
Nucleus
P = 0.015
p53 protein levels (arbitrary units)
+
1.2
1.0-
p53 levels
0.8-
0.6-
0.4-
WB:y-H2AX
WB:histone
0.2-
0
f
WB:p53
WB:histone
WB:LDH
Saline
Iso
P = 0.023
b
Iso
LMB
1 2 3
WT
Nucleus
Iso
ICI
Nucleus
Iso
ICI
WB:p53
WB:B-tubulin
+
+
+
-
+
+
H-89
+
Ns Iso Iso Ns Iso Ns Iso
WB:p53
WB:FOXO3a
WB:p53
WB:histone
WB:LDH
4 5 6 7
Arrb1-- Arrb2-/-
WB:p-MDM2
(Ser 166)
WB:MDM2
WB:p-MDM2
(Ser 166)
WB:MDM2
Figure 1 Chronic catecholamine stimulation leads to p53 degradation and
accumulation of DNA damage via ARRB1/AKT-mediated activation of
MDM2. a, Isoproterenol infusion leads to accumulation of DNA damage and
Transcribed Image Text:y-H2AX (arbitrary units) 2.5 2.0 1.5 1.0 0.5. 0 DNA damage Mouse thymus Iso LY294002- Nucleus P = 0.015 p53 protein levels (arbitrary units) + 1.2 1.0- p53 levels 0.8- 0.6- 0.4- WB:y-H2AX WB:histone 0.2- 0 f WB:p53 WB:histone WB:LDH Saline Iso P = 0.023 b Iso LMB 1 2 3 WT Nucleus Iso ICI Nucleus Iso ICI WB:p53 WB:B-tubulin + + + - + + H-89 + Ns Iso Iso Ns Iso Ns Iso WB:p53 WB:FOXO3a WB:p53 WB:histone WB:LDH 4 5 6 7 Arrb1-- Arrb2-/- WB:p-MDM2 (Ser 166) WB:MDM2 WB:p-MDM2 (Ser 166) WB:MDM2 Figure 1 Chronic catecholamine stimulation leads to p53 degradation and accumulation of DNA damage via ARRB1/AKT-mediated activation of MDM2. a, Isoproterenol infusion leads to accumulation of DNA damage and
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