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5-
hydroxytryptamine
receptor 2A
5-
hydroxytryptamine
receptor 1A
Voltage-
dependent
P/Q-type
calcium channel
subunit
alpha-1A
Voltage-
dependent
L-type calcium
channel subunit
beta-1
Voltage-
dependent
calcium channel
subunit
alpha-2/delta-2
Synaptic
vesicular amine
transporter
Sodium-
dependent
serotonin
transporter
Solute carrier
family 22
member 5
Solute carrier
family 22
member 5
Tryptophan
5-hydroxylase 1
Aromatic-L-
amino-acid
decarboxylase
Ca
+
Serotonin
Serotonin
Aripiprazole
Aripiprazole
Ca
+
Serotonin
Aripiprazole
Aripiprazole
L-Tryptophan
Tetrahydrobiopterin
O
2
5-Hydroxy-L-tryptophan
4a-Hydroxytetrahydrobiopterin
CO
2
Na
+
Na
+
Fe2+
Pyridoxal
5'-phosphate
Gq signaling
cascade
Gi signaling
cascade
Synaptic Vesicle
Cytosol
Cytosol
Presynaptic Neuron
Postsynaptic Neuron
Synapse
↓ Negative symptoms of
schizophrenia
Serotonin is synthesized and
stored in synaptic vesicles
at the nerve terminal
Aripiprazole is a weak
partial agonist at 5HT2A
where it acts as a
functional antagonist to
reduce negative symptoms of
schizophrenia
Aripiprazole agonism at
5HT1A receptors are
responsible for treating for
of the cognitive improvement
in schizophrenia
↑Cognitive Improvement
Brain
Raphei nuclei producing
serotonergic neurons
Blood vessel - blood brain
barrier
Aripiprazole is taken orally
and absorbed from the
gastrointestinal tract.
HTR2A
HTR1A
CACNA1A
CACNB1
CACNA2D2
SLC18A2
SLC6A4
SLC22A5
SLC22A5
TPH1
DDC
Calcium
Serotonin
Serotonin
Aripiprazole
Aripiprazole
Calcium
Serotonin
Aripiprazole
Aripiprazole
L-Tryptophan
Tetrahydrobiopterin
Oxygen
5-Hydroxy-L-
tryptophan
4a-
Hydroxytetrahydrobiopterin
Carbon dioxide
Sodium
Sodium
Gq signaling
cascade
Gi signaling
cascade
HTR2A
HTR1A
CACNA1A
CACNB1
CACNA2D2
SLC18A2
SLC6A4
SLC22A5
SLC22A5
TPH1
DDC
Ca
+
5-HT
5-HT
Abilify
Abilify
Ca
+
5-HT
Abilify
Abilify
Trp
BH4
O
2
5-HTP
4aHtHbp
CO
2
Na
+
Na
+
Fe2+
Pyr-5'P
Gq si c
Gi si c