Comorbidity of alcoholism and antisocial personality disorder · This Presentation is brought to...
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Washington University School of MedicineDigital Commons@Becker
Presentations 2005: Alcoholism and Comorbidity
2005
Comorbidity of alcoholism and antisocialpersonality disorderR. O. PihlMcGill University
Follow this and additional works at: http://digitalcommons.wustl.edu/guzepresentation2005Part of the Medicine and Health Sciences Commons
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Recommended CitationPihl, R. O., "Comorbidity of alcoholism and antisocial personality disorder" (2005). Presentations. Paper 3 Samuel B. Guze Symposiumon Alcoholism.http://digitalcommons.wustl.edu/guzepresentation2005/3
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Comorbidity of Alcoholism and
Antisocial Personality Disorder
R.O. Pihl
McGill University
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Alcoholism & ASPD
• Lets avoid the definitional quagmire.
• Lets agree there is a significant
correlation between Alcoholism and
ASPD.
• Lets agree that the nature of the
relationship is well understood.
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The Role of Different
Motivational Systems
• Motivational system responding to threat
• The Cognitive Control System
• Motivational system responding to reward
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Behavior
Aggression
Threatening or punishing
behavior
(Behaviorally-linked)
Sensory information
Executive Cognitive Functions
Facilitory:Cue for Reward
Inhibitory:Cue for Punishment
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Behavior
Aggression
Threatening or punishing
behavior
AcuteAlcohol
Intoxication
(Behaviorally-linked)
Sensory information
Executive Cognitive Functions
Facilitory:Cue for Reward
Inhibitory:Cue for Punishment
Inhibits
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Behavior
Aggression
Threatening or punishing
behavior
Disorganizes
AcuteAlcohol
Intoxication
(Behaviorally-linked)
Sensory information
Executive Cognitive Functions
Facilitory:Cue for Reward
Inhibitory:Cue for Punishment
Inhibits
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Behavior
Aggression
Threatening or punishing
behavior
Disorganizes
AcuteAlcohol
Intoxication
(Behaviorally-linked)
Sensory information
Potentiates
Executive Cognitive Functions
Facilitory:Cue for Reward
Inhibitory:Cue for Punishment
Inhibits
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The Role of Different
Motivational Systems
• Environmental triggers
1. Threat, anxiety (novelty, cues of punishment, etc…)
2. Monotony (lack of immediate reinforcement)
• Genetically influenced susceptibility
1. Anxiety
2. Boredom
• Desired alcohol reinforcement
1. Anxiolysis (serotonin & GABA effects)
2. Stimulation (Dopaminergic effects)
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Family
Pedigree
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0
2
4
6
8
10
12
14
16*
Non-SOMAHe
art
Ra
te R
espon
se to A
lcoho
l In
toxic
ation
(Perc
ent C
han
ge)
SOMA
Low-Aggressive
High-Aggressive
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0
100
200
300
400
500
600
*
Non-SOMA
No. of A
lcoho
lic B
eve
rage
s p
er
year
SOMA
Low-Aggressive
High-Aggressive
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0
2
4
6
8
10
12
Alc
ohol-In
duced H
R C
hange fro
m B
aselin
e (
BP
M)
NFH F (N = 49)
NFH M (N = 99)
UFH F (N = 17)
UFH M (N = 30)
MFH F (N = 20)
MFH M (N = 92)
ALC M (N = 12)
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-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
SP SR
Dimensions of the SPSRQ
Z s
core
s on
th
e S
PS
RQ
Low HR responders
High HR responders
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-0.5
-0.4
-0.3
-0.2
-0.1
0
0.1
0.2
0.3
0.4
0.5
H/I AS IMP SS
Dimensions of the SURPS
Z s
co
res
on
th
e S
UR
PS Low HR responders
High HR responders
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-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
High Heart Rate
Responders
Low Heart Rate
RespondersZscore
(N
um
ber
of
"Ris
k T
akin
g"
Responses)
Sober
Intoxicated
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Subjects with a High Heart rate
Response to Alcohol Challenge
• Self-rate more of a positive response
• Drink more
• Remember more words learned before
drinking
• Release more dopamine in the Ventral
Striatum
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Positron Emission
Tomography
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Alcohol Promotes Dopamine Release in the
Human Nucleus Accumbens
…and this release is
associated to an
increased HR response
to alcohol
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Background
Phenylalanine and tyrosine, two amino acids (AA)found in dietary protein, are the essential building blocks for the
production of dopamine in the brain.
Ingesting an AA mixture deficient in P&T reduces DA production by 1)causes protein synthesis diminishing the body’s stores of these AA 2) increasing competition of other AAs for transport across the blood brain barrier.
Peek effect of depletion occur 4-5 hours following the ingestion of the AA mixture
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Drinks earned following APTD
0
5
10
15
Relative number of drinks compared to balanced
condition
Nu
mb
er o
f S
ub
ject
s
More
Same
Less
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Alcohol consumption
0
1
2
3
4
5
High Low
Dri
nk
s
Balanced Depleted
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APTD Change in Drinking and Ethanol Cardiac Response
r=.-658, p=.006
percent change in earned drinks
3002001000-100-200
pe
rce
nt
cha
ng
e in
he
art
ra
te
30
20
10
0
-10
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Figure 1 - Mean group differences (+ SE) between Low (n
= 19) and High (n = 19) Heart Rate Responders in the
average of age 10 to 17 delinquency scores
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Figure 2 - Mean group differences (+ SE) between Low (n = 18)
and High (n = 20) Heart Rate Responders in Goldberg's Adjective
Markers of the Big Five assessed at age 19
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
* p < 0.05
*
High Heart Rate Responders
to Alcohol Intoxication
Low Heart Rate Responders
to Alcohol Intoxication
Zsco
re (
Go
ldb
erg
's A
dje
ctive
Ma
rke
rs o
f th
e B
ig F
ive
) Agreeableness
Conscientiousness
Emotional Stability
Extraversion (Surgency)
Intellect
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Figure 3 - Mean group differences (+ SE) between Low (n
= 20) and High (n = 22) Heart Rate Responders in
Subjective High Assessment Scale (SHAS) at age 19
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
*
* p = 0.052
High Heart Rate Responders
to Alcohol Intoxication
Low Heart Rate Responders
to Alcohol Intoxication
Zscore
(S
ubje
ctive H
igh A
ssessm
ent S
cale
)
Subjective effects of alcohol
"The worst that I have ever felt"
"The best that I have ever felt"
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Apparatus: Taylor Aggression
Paradigm (TAP)
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-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
High HR RespondersLow HR Responders
Zsco
re (
Me
an
Sh
ock S
ele
cte
d) Sober
Intoxicated
TAP - Mean Shock Level Selected
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-1.4
-1.2
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0Z
sco
re T
ota
l E
rro
rs (
SC
AL
T &
NS
CA
LT
&S
OP
) Non-SOMA & Non-Aggressive
Non-SOMA & Aggressive
SOMA & Non-Aggressive
SOMA & Aggressive
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Commonalities Alcoholism & ASPD
• Unusual high heart rate response to high
dose of alcohol.
• High activation of the Cue for Reward
System.
• A system that is dopamine mediated.
• Reduced ECF functioning.
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