neuropsychological outcomes in plwha initiating haart: thoughts from the epicentre columbia...
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Neuropsychological Outcomes in PLWHA Initiating HAART: Thoughts from the
EpicentreColumbia University, HIV Center, Grand Rounds
03 March 2011
John A. JoskaDirector, GSH-HIV Mental Health GroupDepartment of Psychiatry and Mental HealthUniversity of Cape Town
Summary of talk
• HIV is highly prevalent in South Africa• HAND is documented to be highly prevalent in
HIV• Both *epidemics* may be different in SA• The effects of HAART may be different• In what ways can we
– Understand HAND better– Improve screening for HAND / raise awareness– Provide support to *many* PLWHA with HAND
HIV/AIDS South Africa Progress Report 2010• “ HIV in South Africa is transmitted predominantly heterosexually
between couples, with mother-to-child transmission being the other main infection route. Drivers of the epidemic in South Africa are intergenerational sex, multiple concurrent partners, low condom use, excessive use of alcohol and low rates of male circumcision.” Dr Aaron Motsoaledi, Minister of Health, South Africa
Antenatal data 2008
Prevalence of HIV-Associated Neurocognitive Disorders (HAND) by Stage of HIV Disease
15.1%
26.5%
4.8%
0.5%
25.4%
18.3%
1.9%
17.7%
28.3%
1.8%
0%
10%
20%
30%
40%
50%
60%
% withDisorder
HIV- CDC A CDC B CDC C
ANI MND HAD
(n=212) (n=437) (n=213) (n=113)
The problem of HIV-D
• HIV seroprevalence in SA adults 18%• >20 000 in Wcape entering stage 4 per year• 50% will get HAART
• >25% of ALL will have diagnosable HAND• 5-10% will be HIV-D• Untreated HIV-D: mean time to death 6/12• Treated HIV-D: mean time to death 44/12• HAND exerts many other deleterious effects
Although HAART improves health and prolongs survival, NeuroAIDS remains prevalent
Adherence to Antiretrovirals Related to Neurocognitive Impairment
0
20
40
60
80
100
NP Unimpaired NP Impaired0
20
40
60
80
100
NP Unimpaired NP Impaired
% That Followed Schedule “Most of the Time”
% That Followed Specific InstructionsRe Meds “Most of the Time”
Slide courtesy of Igor Grant
Differences between global HIV and SA
• Prevalence: 10.5%... 18%... 29%...• Mode of transmission (recombinants?)• Gender (70:30)• Poverty, malnutrition
• Viral factors: clade (B vs C)
A B C D F G 01 02 06 07/08 11 12 19 33
Subtypes/CRF
Thomson et al. 2009
Global distribution of HIV subtypes
Viral factors: Clade C
• Clade C may differ from B in terms of :– Protein binding sites, binding characteristics, replicative capacity– Functional relevance:
• The mutation associated with reduced monocyte chemokine migration
• CNS relevance:– Tat is involved in the migration of monocytes into the brain via
upregulation of inflammatory cytokines and adhesion molecules.– Tat also disrupts the tight-junctions in the BBB– Tat may exert direct or indirect neurotoxic effects on glia/neurons
– Possibly in neurotoxicity and risk for cognitive impairment
HI Viral Genome: Cape Town: South Africa: Viral Sequencing in 65 PLWH Attending
Primary Care Facilities
gag pol Tat 1 vif_vpr Tat 2 Rev Subtype
C 49 33 44 41 36 49
A 4 1 1 0 1 1
B 0 1 0 1 0 0
Other 0 1 0 1 0 0
Recombinant 0 0 0 0 0 8
Joska, Engelbrecht- unpublished data
Questions: A Pilot Study of HAND in Cape Town, South Africa
• How prevalent is HAND in clade C• What are the demographic and clinical
associations• Does apolipoprotein E confer vulnerability• Is it possible to screen for HIV-D using an
existing brief tool• How do PLWH respond to HAART
Updated Nosology for HAND: American Academy / HNRC (Antinori et al 2007)
Normal Asymptomatic Neuropsychological Impairment (ANI)
Mild Neurocognitive Disorder
HIV-Associated Dementia (HIV-D)
Neuropsychology*
No worse than 1.0 SD on one domain
≥ 1.0 SD below mean on ≥ 2 domains
≥ 1.0 SD below mean on ≥ 2 domains
≥ 2.0 SD below mean on ≥ 2 domains
Function No impairment on self-report of knowledgable others
No impairment on self-report or from knowledgeable others
*Mild*impairment on self-report or from knowledgeable others
*Marked*impairment on self-report or from knowledgeable others
Exclusion No other condition, esp delirium, MDD or substances
No other condition, esp delirium, MDD or substances
No other condition, esp delirium, MDD or substances
No other condition, esp delirium, MDD or substances “MDD+HIV-D= HIV-D”
*Must sample: verbal/language; attention/working memory; abstraction/executive;memory (learning; recall); speed of information processing; sensory-perceptual, motor skills
Issues: Neuropsychology
• Norms– Age, education, gender, and ethnicity– May affect rates of impairment by up to 50%– CT studies: 50-100 controls… norms
• Test administration– Language of testing– Competency of tester– Approx 30 of first participants tested in… English
• Domains– IHDS= memory and motor– 2 tests across at least 3 domains desirable
Language of Testing: Tests Used to Quantify HAND
Issues: Functional Assessment• Should be assessed using either/and
– Self-report– Report of “knowledgable” person– Objective measure
• Functional data should be obtained using “standardized instruments” and ideally with “norms”
• Needs to measure cognitive abilities and iADLs– Meds, finances, shopping, cooking, housekeeping, driving,
working• We used PAOFI and CT ADL
– Pts under-rate impairment; most unemployed; most have limited access to “instruments”; “knowledgeable others” not readily available.
Meaning of NP Impairment: Employment
7.9%
17.5%
0
2
4
6
8
10
12
14
16
18
20
NP Normal (N=152) NP Impaired (N=80)
% U
NE
MP
LO
YE
D
Domain Self-report Collateral report Objective assessment
Memory Cell-phone number, shopping list
Communication Listening to cell-phone instructions
Use of hands/fingers
Dialling a number
Financial/money Making change from a taxi
Towards a Valid Brief Functional Assessment Tool for South Africa (or the
developing world?)
Issues: Exclusion
• HIV-related OI’s and tumours• Developmental e.g. ADHD/ ID• Neuropsychiatric e.g. depression and substance
– Wait a month; although if HIV-D present= HIV-D• Unrelated neurological e.g. epilepsy, TBI
• What to do: MINI / scales, self-report, neuromedical examination, ?which special investigations- Hep C*, RPR*, CTB*, LP*, nutritional parameters– Resources, based on level of suspicion.
Approach: Cape Town
*Neuropsychological Assessment*
Neuropsychiatric Assessment
Functional Assessment
PAOFI / CTADL / QLESQ
NeurologicalMINI / AUDIT / CES-
D / SAMISS
Domains: Attention/Concentration, Memory (verbal and visual),
Psychomotor/ speed of processing, Executive, Language, Intelligence
Clinical staging of neurocognitive status: Marder et al 2008
MSK stageNEAD
modificationFeatures
New AAN criterion
Grooved pegboard (non-dom)
IHDS score
IHDS category
Stage 0 (normal) NP normal Normal N/A 0.35 (0.5) 11,120. No
impairment
Stage 0.5 (sub-clinical)
NP normal with CNS/ADL problem OR NP=1 with no
CNS/ADL
Mild features, no impairment
Asymptomatic neuropsycholgical impairment (ANI)
-1.1 (1.2) 100. No
impairment
Stage 1 (mild HIV-D)
NP=1 with CNS/ADL problems OR NP=2 with no CNS/ADL
problems
Clear NP problem, mild ADL problem,
walking
Mild neurocognitive disorder (MND) -2.2 (2.8) 9 1. Mild NCD
Stage 2 (moderate HIV-D)
NP=2 with CNS/ADL problems, but not
severe
Basic ADLs fine, others impaired, walking
perhaps cane
HIV-associated dementia (HAD or
HIV-D)-3.8 (3.1) 8
2. HIV-D (moderate)
Stage 3 (severe HIV-D)
NP=2 or 3 and moderate to severe problems CNS/ADL
Severe cognitive OR psychomotor
problems, walks with assistance
HIV-associated dementia (HAD or
HIV-D)-18.1 6,7
2. HIV-D (severe)
Stage 4 (v severe/end stage
HIV-D)
Unable to test, unable to walk
Nearly vegetative,
paretic, incontinent
HIV-associated dementia (HAD or
HIV-D) <6
2. HIV-D (severe)
Test Performance HIV+ vs HIV- : Tests included in analyses
HIV negative controls
(n=93)HIV positive participants
(n=96) P value
Age 25.16 (5.15) 29.75 (3.67) 0.000
Education 10.88 (1.28) 10.05 (1.77) 0.000
Gender female (%) 58 (62.4) 76 (79.2) 0.790
CD4 cell count 218.09 (150.57)
Years since diagnosis 3.35 (2.04)
Screener
IHDS total 10.89 (1.10) 10.29 (1.55) 0.005
IHDS FT subscore 3.88 (0.36) 3.52 (0.79) 0.000
IHDS hand sequence subscore 3.21 (0.88) 3.22 (0.92) 0.937
IHDS 4-word recall 3.78 (0.59) 3.35 (0.91) 0.000
Motor FT non-dom 6.77 (1.71) 8.87 (2.08) 0.000
GP non-dom 78.36 (12.54) 87.05 (25.46) 0.004
Memory HVLT recall 8.07 (2.07) 7.03 (2.09) 0.001
BVMT recall 8.97 (2.92) 6.52 (3.50) 0.000
Attention MAT 16.47 (6.43) 16.76 (5.20) 0.747
Mental control 23.67 (5.93) 19.48 (5.62) 0.000
Psychomotor processingDigit symbol 46.83 (14.62) 40.72 (13.18) 0.003
TMTA 40.18 (16.31) 60.56 (32.41) 0.000
Colour I 54.66 (21.10) 53.21 (16.93) 0.605
Executive
Colour II 115.48 (50.98) 122.27 (48.47) 0.350
RCF copy 32.82 (3.87) 29.26 (6.34) 0.000
Stroop C/W 33.66 (9.57) 27.91 (9.24) 0.000
WCST per errors 31.92 (19.68) 45.34 (25.41) 0.000
Language animal 15.80 (4.64) 13.27 (4.67) 0.000
fruit & veg 15.11 (3.61) 13.70 (4.07) 0.013
HIV-associated neurocognitive disorders in primary care, Cape Town
Neurocognitive disorder category (n=170) (%)
Normal ANI MND HIV-D statistical value
No (%) 40 (23.5) 15 (8.8) 72 (42.4) 43 (25.3)
Demographics
Women, no (%) 33 (82.5) 11 (73.3) 53 (73.6) 29 (69.1) Fisher's exact= 0.551
Left handed, No (%) 35 (87.5) 14 (93.3) 66 (91.7) 39 (90.7) Fisher’s exact= 0.903
Language isiXhosa, no (%) 34 (85) 14 (93.3) 63 (87.5) 40 (93) Fisher’s exact= 0.203
Age, median (IQR) 30.5 (27.5-32) 28 (25-31) 28.5 (26-32) 31 (28-33) chi-sq=8.420, p=0.038
Education, median (IQR) 11 (11-12) 9 (9-11) 10 (9-11) 10 (8-11) chi-sq=18.215, p=0.0003
Medical
CD4, median (IQR) 172 (126-190) 205 (148-235)174.5 (116.5-
236.5)139 (97-182) chi sq=7.76, p=0.0512
Peripheral neuropathy, no
(%)37 (64.86) 15 (26.67) 69 (60.87) 39 (61.54) Fisher’s exact= 0.072
AUDIT 0 (0) 1 (0) 2 (0) 3 (0) chi sq=0.925, p=0.815
CES-D 0 (0) 1 (0) 2 (0) 3 (0) chi sq=1.000, p=0.815
Joska et al, Aids and Behaviour Epub
Newborns from the same community have higher frequency of E2,2
Joska et al, J. Neurovirol 2010
Apoliprotein E4 is not associated with the development of HIV-D in South Africa
Characteristics of Participants: Retained vs Non-retained
Individual Neuropsychological Tests all NS except: CT1, Stroop, Animals
Non-HAART: 15 high CD4, 6 erratic attenders, 1 used HAART for 1/12
Characteristics of Retained group: HAART vs non-HAART
Characteristics of Retained group: HAART vs non-HAART cont.
HAART initiators improved *more*
Predictors of NP Change
Patterns of HIV-D in HAART era
McArthur 2004
Explaining NP Improvement• Whole group (HAART and non-HAART)• Non-HAART group small• Practice/ test-experience effect
– Language of testing– Experienced technicians (IRR?)
• HAART does not appear to produce deterioration in our population
• LTFU’s remove the ?non-improvers (ITT analysis)• HAART: suppresses peripheral VL, reduces HIV entry into
CNS, reduces frank inflammatory processes in a severely immuno-compromised group (?but not micro-inflammation)
Towards a model of Neurocognitive Outcomes
Neuro-psychological Impairment
Age
Duration of Infection
Testing methodology
Comorbidity: depression
Pre-morbidity: ETOH, Meth, TBI
Education IntelligenceGenes: APOE, MCP-1, et al
Inflammatory response
HIV sub-type / viral factors
HAART:CPE/ Metabolic/
Neurotoxic effects
Age-related decline:Metabolic/ vascular/
SDAT
Screening for neurocognitive disorders: The IHDS
Cut-off score <10: Sensitivity 80%, Specificity 55%
Sacktor et al 2005
Performance of the IHDS in Cape Town
Cut-off points of the IHDS: is 11 better than 10?
Joska et al, Aids Patient Care and STDs 2011
Conclusions
• HAART appears to result in significant NP improvement in PLWH infected with predominantly clade C HIV.
• Technical problems with study potential cloud findings
• Future study:– Matching group with similar disease characteristics– Careful immunological profiling at visits– NP technical issues/ testing environment/ norms– Imaging (MRS) plus …CSF
Thank you!
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