update on current and near future antiretroviral …...update on current and near future...
TRANSCRIPT
Update on Current and Near Future Antiretroviral Therapy
Jihad Slim, MD
Assistant Professor of Medicine
NYMC, Valhalla, N.Y.
Chief of Infectious Disease
SMMC, Newark, N.J.
HIV+ Patients are living longer
ART, antiretroviral therapy; PY, person years. 1 Palella FJ, et al. J Acquir Immune Defic Syndr. 2006;43:27-34; 2 Centers for Disease Control and Prevention (CDC). HIV/AIDS
Surveillance Report: Cases of HIV Infection and AIDS in the United States and Dependent Areas. 2005; 3 CDC. Diagnoses of HIV
Infection in the United States and Dependent Areas. 2011; 4 Effros RB, et al. Clin Infect Dis. 2008;47:542-553; 5 Samji H, et al.
PLoS ONE 2013; 8e81355.
Estimated Percentage of Persons Living
With HIV/AIDS Who Are Aged ≥50 Years2-4
• In the United States, a 20-year-old HIV-positive patient can now expect to live into his/her early 70s5
COMORBIDITIES ARE MORE PREVALENT IN HIV-POSITIVE PATIENTS
• Similarities between aging and the courses of HIV and AIDS suggest that HIV infection may compress certain aging processes, thereby accelerating comorbidities and frailty1
• Duration of ART use (OR 1.24 per 5 additional years of ART use) and lower nadir CD4 cell count (OR 1.12 per 100 fewer cells) were associated with an increased risk of a higher number of comorbidities
CLD, chronic liver disease; HTN, hypertension; MI, myocardial infarction; OR, odds ratio; PAD, peripheral artery disease. 1 Effros RB, et al. Clin Infect Dis. 2008;47:542-553; 2 Schouten J, et al. IAC 2012. Washington, DC. THAB0205.
Subjects ≥45 Years With Age-Associated Noncommunicable
Comorbidities, by HIV Serostatus (AGEhIV Study, 2010-2012)2
Age-Associated Noncommunicable Comorbidity
P <.0001
HTN Non-AIDS Cancer
Angina Pectoris
MI PAD CLD Cerebrovascular Disease
Pa
rtic
ipa
nts
, %
0
20
30
40
50
10
P <.0001
P <.05
P <.05 P <.05
P <.05 P <.05
HIV-Positive Patients (n=381) HIV-Uninfected Individuals (n=349)
Current Antiretroviral Medications NRTI
•Abacavir
•Didanosine
•Emtricitabine
•Lamivudine
•Stavudine
•Tenofovir
•Zidovudine
NNRTI
•Delavirdine
•Efavirenz
•Rilpivirine
•Etravirine
•Nevirapine
PI
•Atazanavir
•Darunavir
•Fosamprenavir
•Indinavir
•Lopinavir
•Nelfinavir
•Ritonavir
•Saquinavir
•Tipranavir
Fusion Inhibitor
• Enfuvirtide
CCR5 Antagonist
• Maraviroc
Integrase Inhibitor
• Raltegravir
• Elvitegravir
• Dolutegravir
Combined Drugs
NRTI
•Lamivudine
•Zidovudine
NNRTI
PI
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
COMBIVIR
Combined Drugs
NRTI
•Abacavir
•Lamivudine
NNRTI
PI Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
EPZICOM
Combined Drugs
NRTI
•Abacavir
•Lamivudine
•Zidovudine
NNRTI
PI
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
TRIZIVIR
Combined Drugs
NRTI
•Emtricitabine
•Tenofovir (TDF)
NNRTI
PI
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
TRUVADA
Combined Drugs
NRTI
•Emtricitabine
•Tenofovir (TAF)
NNRTI
PI
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
DESCOVY
Combined Drugs
NRTI
NNRTI
PI
•Atazanavir
+Cobicistat
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
EVOTAZ
Combined Drugs
NRTI
NNRTI
PI
•Darunavir
+ Cobicistat
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
PREZCOBIX
Combined Drugs (STR)
NRTI
•Emtricitabine
•Tenofovir (TDF)
NNRTI
•Efavirenz
PI
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
ATRIPLA
Combined Drugs (STR)
NRTI
•Emtricitabine
•Tenofovir (TDF)
NNRTI
•Rilpivirine
PI Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
COMPLERA
Combined Drugs (STR)
NRTI
•Abacavir
•Lamivudine
NNRTI
PI
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
•Dolutegravir
TRIUMEQ
Combined Drugs (STR)
NRTI
•Emtricitabine
•Tenofovir (TDF)
NNRTI
PI Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
Elvitegravir
STRIBILD
Cobicistat
Combined Drugs (STR)
NRTI
•Emtricitabine
•Tenofovir (TAF)
NNRTI
•Rilpivirine
PI Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
ODEFSEY
Combined Drugs (STR)
NRTI
•Emtricitabine
•Tenofovir (TAF)
NNRTI
PI Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
Elvitegravir
GENVOYA
Cobicistat
Studies 104/111: TAF vs TDF in Treatment-Naive Pts
• Parallel, randomized, double-blind, active-controlled phase
III studies
– Primary endpoint: HIV-1 RNA < 50 c/mL at Wk 48 (FDA
Snapshot)
Arribas JR, et al. CROI 2017. Abstract 453. Sax PE, et al. Lancet. 2015;385:2606-2615.
EVG/COBI/FTC/TAF* single-tablet regimen
(n = 866)
EVG/COBI/FTC/TDF†
single-tablet regimen (n = 867)
Treatment-naive HIV-infected pts with
HIV-1 RNA ≥ 1000 copies/mL, eGFR ≥ 50 mL/min
(N = 1733)
Stratified by HIV-1 RNA, CD4+ cell count, geographic region
Wk 48:
Primary Endpoint Wk
144
*150/150/200/10 mg once daily. †150/150/200/300 mg once daily.
Initial ART With E/C/F/TAF Superior to E/C/F/TDF
at Wk 144
• Efficacy similar across pt
subgroups, trending
toward or significantly
better with TAF in each
group
– By baseline HIV-1 RNA,
baseline CD4+ cell count,
adherence, age, sex,
race, region
• Virologic failure with
resistance by Wk 144:
1.4% in each arm
Arribas JR, et al. CROI 2017. Abstract 453. Sax PE, et al. Lancet. 2015;385:2606-2615.
0
20
60
40
80
100
48 96 144 48 96 144 48 96 144 Wk:
Virologic
Success
Virologic
Failure
No Data
E/C/F/TAF (n = 866)
E/C/F/TDF (n = 867)
92 90 87 85 84 80
4 4 5 4 5 4 4 6 9 11 11
16
Pts
(%
)
Treatment Difference Wk 48: 2.0% (95% CI: -0.7% to
4.7%) Wk 144: 4.2% (95% CI: 0.6% to
7.8%; P = .02)
Initial ART With E/C/F/TAF vs E/C/F/TDF: Wk 144
Safety Outcomes
• Rate of discontinuation for AEs
higher with TDF vs TAF regimen
– 3.3% vs 1.3% (P = .01)
• Spine and hip BMD loss greater
with TDF vs TAF regimen
– 6 discontinuations for bone AEs in
TDF arm vs 0 in TAF arm
• TC, LDL, and HDL increases
greater with TAF vs TDF regimen,
but no difference in TC:HDL ratio
– Rates of lipid-modifying therapy
initiation similar: 5.5% vs 5.8%
Renal Events Leading to Discontinuation, n
E/C/F/TAF (n = 866)
E/C/F/TDF (n = 867)
Proximal renal tubulopathy
0 4
Cr elevation or eGFR decrease
0 3
Renal failure 0 2
Nephropathy 0 1
Proteinuria 0 1
Bladder spasm 0 1
Total 0 12
Arribas JR, et al. CROI 2017. Abstract 453.
Future Combined Drugs (STR)
NRTI
•Lamivudine
NNRTI
PI
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
•Dolutegravir
?
Switch to DTG + 3TC From Virologically
Suppressive Triple ART
• Noncomparative, open-label, single-arm multicenter trial
– Primary endpoint: therapeutic success at Wk 56 (ie, after
48 wks of dual therapy)
• Therapeutic failure: HIV-1 RNA > 50 copies/mL, interruption,
lost to f/u, death
Joly V, et al. CROI 2017. Abstract 458.
DTG 50 mg QD + 2 NRTI†
HIV-infected pts with HIV-1 RNA ≤ 50 copies/mL for ≥ 2 yrs on first-line ART;
≤ 2 ART modifications allowed, except within 6 mos of study start; CD4+ cell count
> 200 cells/mm3
(N = 110)
Wk 8* Wk 56
*Pts with HIV-1 RNA ≤ 50 copies/mL proceeded to phase II. †In phase I, third agent in regimen replaced with DTG; baseline
NRTI backbone maintained.
DTG 50 mg QD +
3TC 300 mg QD
(n = 104)
Phase I Phase II
Switch to DTG + 3TC Maintains Viral Suppression
• 97% (101/104) pts maintained
therapeutic success through 40
wks of dual therapy (study Wk 48)[1]
– No INSTI resistance in 3 pts with
virologic failure
– 7 pts with serious AEs, only 2
related to dual therapy
• DTG + 3TC dual therapy currently
under phase III evaluation as both
initial ART[2,3] and as a switch
strategy for virologically
suppressed pts[4]
1. Joly V, et al. CROI 2017. Abstract 458. 2. ClinicalTrials.gov. NCT02831673. 3.
ClinicalTrials.gov. NCT02831764 4. ClinicalTrials.gov. NCT02263326.
Therapeutic Success, n/N* (%) DTG + 3TC
Wk 0 (entry; on BL triple therapy) 110/110 (100)
Wk 8 (end of phase I, start of phase II) 104/104 (100)
Wk 12 104/104 (100)
Wk 16 103/104 (99)
Wk 24 103/104 (99)
Wk 32 103/104 (99)
Wk 40 102/104 (98)
Wk 48 101/104 (97)
*Pts enrolled in phase I, N = 110; pts enrolled in
phase II, N = 104.
Future Combined Drugs (STR)
NRTI
NNRTI
•Rilpivirine
PI
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
•Dolutegravir
?
SWORD 1 & 2: Switch From Suppressive ART to
DTG + RPV Dual Therapy
• Randomized, open-label, multicenter phase III trials
– Primary endpoint: HIV-1 RNA < 50 copies/mL at Wk 48
(ITT-E snapshot)
• 70% to 73% of pts receiving TDF at baseline
Llibre JM, et al. CROI 2017. Abstract 44LB.
Switch to DTG + RPV (n = 513)
Continue Baseline ART
(n = 511)
HIV-infected pts with HIV-1 RNA < 50 c/mL for
≥ 12 mos while receiving first or second ART regimen with 2 NRTIs + INSTI, NNRTI, or PI; no previous VF; HBV negative
(N = 1024)
Wk 52 Wk 148
Switch to DTG + RPV
Continue DTG + RPV
DTG + RPV
Switch From Suppressive ART to DTG + RPV
Noninferior to Cont. BL ART at Wk 48
• 1 pt with confirmed criteria
for virologic withdrawal at
Wk 36 in DTG + RPV arm
had K101K/E
– Documented
nonadherence at VF
– Resuppressed with
continued DTG + RPV
– No INSTI resistance
Llibre JM, et al. CROI 2017. Abstract 44LB.
Virologic
Nonresponse
Wk 48
HIV-1 RNA
< 50 c/mL
No Data
100
80
60
40
20
0
Pts
(%
)
95 95
< 1 1 5 4
Treatment difference: -0.2% (95% CI: -3.0% to 2.5%)
DTG + RPV (n = 513) Baseline ART (n = 511)
Switch From Suppressive ART to DTG + RPV:
Safety Outcomes
• AE rates generally similar
between treatment arms
through Wk 52
– Numerically higher rate of
drug-related grade 1/2 AEs
with switch: 17% vs 2%
– Numerically higher rate of
withdrawal for AEs with
switch: 4% vs < 1%
• No notable change in serum
lipid values from baseline to
Wk 48 in either treatment
arm
Llibre JM, et al. CROI 2017. Abstract 44LB.
Bone-specific
alkaline
phosphatase
Osteocalcin Procollagen 1
N-terminal
propeptide
Bone Turnover Marker
DTG + RPV Baseline ART
0
20
60
40
80
Me
an
(µ
g/L
)
Baseline
Wk 48
15.9 12.9
100 Baseline
Wk 48
16.2 17.1 23.8
19.0 24.0 23.1
53.0 45.6
55.3 54.7
P < .001 P < .001
P < .001
Future Combined Drugs (STR)
NRTI
•Emtricitabine
•Tenofovir (TAF)
NNRTI
PI
•Darunavir
+ Cobicistat
Fusion Inhibitor
CCR5 Antagonist
Integrase Inhibitor
?
Future New Drugs in Existing Classes
• NNRTI: Doravirine.
• INSTI : Bictegravir
Doravirine or Darunavir + RTV Both With 2 NRTIs
in Treatment-Naive Pts
• Doravirine: next-gen NNRTI, unique resistance profile, low DDI
potential, no food or PPI effects
• Multicenter, randomized, double-blind phase III trial
– Primary endpoint: HIV-1 RNA < 50 copies/mL at Wk 48
14-day follow-up
Molina JM, et al. CROI 2017. Abstract 45LB.
Wk 96
DOR 100 mg QD + FTC/TDF or ABC/3TC QD +
Placebo for DRV + RTV (n = 385)
DRV 800 mg + RTV 100 mg QD + FTC/TDF or ABC/3TC QD +
Placebo for DOR (n = 384)
HIV-infected pts with HIV-1 RNA
≥ 1000 copies/mL within 45 days of Day 1;
no previous ART; no resistance to study drugs
(N = 769)
Stratified by HIV-1 RNA > 100,000 c/mL, baseline NRTI
Wk 48
Doravirine Is Noninferior to DRV + RTV at Wk 48
• Efficacy similar in both
arms regardless of
baseline HIV-1 RNA or
CD4+ cell count
• No drug resistance
detected in pts with PDVF
through Wk 48 in either
arm
– n = 1 pt with
noncompliance
discontinued at Wk 24,
developed DOR and FTC
resistance
Molina JM, et al. CROI 2017. Abstract 45LB.
Virologic
Nonresponse
Wk 48
HIV-1 RNA
< 50 c/mL
No Data
100
80
60
40
20
0
Pts
(%
)
84 80
11 13 5 7
Treatment difference: 3.9% (95% CI: -1.6% to 9.4%)
DOR + 2 NRTIs (n = 383)
DRV + RTV + 2 NRTIs (n = 383)
Doravirine vs DRV + RTV: Safety
Molina JM, et al. CROI 2017. Abstract 45LB.
AE, % DOR
(n = 383)
DRV +
RTV
(n = 383)
≥ 1 AE 80 78
Treatment-related
AE 31 32
Serious AE 5 6
Discontinuation for
AE 2 3
AEs of clinical
interest
Rash*
Neuropsychiatric†
7
11
8
13
Fasting Lipid Δ From
BL to Wk 48, mg/dL
DOR
(n = 383)
DRV +
RTV
(n = 383)
LDL-c* -4.51 9.92
Non-HDL-c* -5.3 13.75
Cholesterol -1.37 17.9
Triglyceride -3.14 21.97
HDL-c 3.94 4.15
*Discontinued due to rash: n = 2 in DOR arm; n =
1 in DRV + RTV arm. †No discontinuation for neuropsychiatric
conditions.
*P < .0001 for DOR vs DRV + RTV.
Bictegravir + FTC/TAF vs DTG + FTC/TAF in
Treatment-Naive Pts
• Bictegravir: investigational QD INSTI, active against most INSTI RAVs,
low DDI potential, half-life ~ 18 hrs, no food requirement with dosing,
primarily metabolized by CYP3A4 and UGT1A1
• Randomized, double-blind, active-controlled phase II trial
– Primary endpoint: HIV-1 RNA < 50 copies/mL at Wk 24
Open-label extension
Sax PE, et al. CROI 2017. Abstract 41. Sax PE, et al. Lancet HIV. 2017;[Epub ahead
of print]. Zhang H, et al. CROI 2017. Abstract 40.
Wk 48
BIC + FTC/TAF QD + Placebo for DTG QD
(n = 65)
DTG + FTC/TAF QD + Placebo for BIC QD
(n = 33)
Wk 24
HIV-infected pts with HIV-1 RNA
≥ 1000 copies/mL; CD4+ ≥ 200 cells/mm3;
no previous ART; HBV and HCV negative
(N = 98)
Bictegravir + FTC/TAF vs DTG + FTC/TAF: Wk 24
and Wk 48 Efficacy (FDA Snapshot)
• No drug resistance detected in either arm through Wk 48
Sax PE, et al. CROI 2017. Abstract 41.
Virologic
Failure
Wk 48
Virologic
Success
No Data
100
80
60
40
20
0
97 91
2 6 2 3
Treatment difference: 6.4% (95% CI: -6% to 18.8%)
Virologic
Failure
Wk 24
Virologic
Success
No Data
100
80
60
40
20
0
Pts
(%
)
97 94
3 6 0 0
Treatment difference: 2.9% (95% CI: -8.5% to 14.2%)
BIC + FTC/TAF (n = 65) DTG + FTC/TAF (n = 33)
• Difficult to conclude on safety from
small study, but 4 fully enrolled
phase III trials now evaluating
efficacy, safety, tolerability of
coformulated BIC/FTC/TAF
Bictegravir + FTC/TAF vs DTG + FTC/TAF: Safety
Sax PE, et al. CROI 2017. Abstract 41.
Any Grade AE
Occurring in ≥ 5% in
Either Arm, %
BIC +
FTC/TAF
(n = 65)
DTG +
FTC/TAF
(n = 33)
Diarrhea 12 12
Nausea 8 12
Headache 8 3
URTI 8 0
Fatigue 6 6
Arthralgia 6 6
Chlamydial infection 6 3
Back pain 6 0
Furuncle 5 6
Flatulence 2 6
Gastroenteritis 2 6
Costochondritis 0 6
Hemorrhoids 0 6
Pruritus 0 6
Grade 2-4 Lab
Abnormality ≥ 5% in
Either Arm, %
BIC +
FTC/TAF
(n = 64*)
DTG +
FTC/TAF
(n = 32*)
Creatine kinase 13 9
AST 9 3
Hyperglycemia 8 13
ALT 6 0
LDL 6 9
Amylase 5 6
Hematuria 3 6
Glycosuria 2 6
*Pts with ≥ 1 post-BL laboratory assessment,
excluding those not specified for all pts.
Emerging Investigational Agents for Pts With MDR HIV
1. Lalezari JP, et al. Lancet HIV. 2015;2:e427-437. 2. Granados-Reyes ER, et
al. HIV Glasgow 2016. Abstract O335A. 3. ClinicalTrials.gov. NCT02362503. 4.
Lewis S, et al. CROI 2017. Abstract 449LB.
5. Lin H-H, et al. CROI 2017. Abstract 438.
Investigational
Agent Phase MoA
Fostemsavir[1-3] III
Prodrug; when metabolized
binds gp120 to prevent CD4+
cell attachment, entry
Ibalizumab[4,5] III Humanized anti-CD4 receptor
mAb
AI438011: Fostemsavir + RAL + TDF in Treatment-Experienced Pts
• Fostemsavir: prodrug; proposed MoA: binding HIV-1 gp120 prevents viral attachment and entry into host CD4+ cells
• Randomized, active-controlled phase IIb study, blinded to dose
– Primary endpoint: HIV-1 RNA < 50 c/mL at Wk 24
Granados-Reyes ER, et al. HIV Glasgow 2016. Abstract O335A.
Llamoso C, et al. HIV Glasgow 2016. Abstract O335B.
Fostemsavir 600 mg QD* PO + RAL + TDF
(n = 51)
HIV-infected pts with exposure
to ≥ 1 ARV for ≥ 1 wk;
HIV-1 RNA ≥ 1000 c/mL;
CD4+ ≥ 50 cells/mm3; virus
susceptible to RAL, TDF, ATV,
and fostemsavir IC50 < 100 nM
(N = 254)
Wk 48 Wk 24: 1̊ endpoint
ATV/RTV 300/100 mg QD + RAL + TDF
(n = 51)
Fostemsavir 1200 mg QD PO + RAL + TDF
(n = 50)
Fostemsavir 400 mg BID* PO + RAL + TDF
(n = 50)
Fostemsavir 800 mg BID* PO + RAL + TDF
(n = 49)
Wk
96
*Fostemsavir dose changed to 1200 mg QD from
Wk 48 to Wk 96.
Efficacy, Safety of Fostemsavir + RAL + TDF
At Wk 96, 90% of pts had HIV-1 RNA < 50 copies/mL in both fostemsavir and ATV/RTV arms in observed analysis[1]
– No significant differences in virologic efficacy regardless of race, sex, age, BL HIV-1 RNA, BL CD4+ cell count, or IC50 subgroups[1]
– Fostemsavir generally well tolerated, with higher rates of grade 2-4 treatment-emergent AEs (37% vs 9%) and d/c for AEs (10% vs 3%) for ATV/RTV arm vs fostemsavir arm[2]
1. Granados-Reyes ER, et al. HIV Glasgow 2016. Abstract O335A.
2. Llamoso C, et al. HIV Glasgow 2016. Abstract O335B.
TMB-301: Ibalizumab in Pretreated Pts Infected With Multidrug-Resistant HIV
• Ibalizumab: humanized mAb to CD4 receptor that blocks HIV entry into CD4+ T-cells
– FDA breakthrough and orphan drug designations
• Single-arm, open-label phase III trial
– Primary endpoint: ≥ 0.5 log10 HIV-1 RNA decrease at Day 14
Lewis S, et al. CROI 2017. Abstract 449LB.
Pts with HIV-1 RNA
> 1000 copies/mL;
on ART ≥ 6 mos, on
stable ART ≥ 8 wks;
resistant to
≥ 1 ARV from 3
classes, sensitive to ≥
1 ARV for OBR
(N = 40)
Wk 25
Ibalizumab
2000 mg IV Day 7
(loading dose)
Continue Failing ART
Days 0-14
Ibalizumab
800 mg IV Day 21, Q2W
(maintenance dose)
Switch to OBR
Day 14
Primary Endpoint:
Day 14 Control Period:
Day 0-7
TMB-301: Efficacy
Lewis S, et al. CROI 2017. Abstract 449LB.
Virologic Outcome Ibalizumab + OBR
Day 14
≥ 0.5 log10 HIV-1 RNA decrease, % 83*
≥ 1.0 log10 HIV-1 RNA decrease, % 60
Mean HIV-1 RNA decrease, log10 1.1
Wk 24
≥ 1.0 log10 HIV-1 RNA decrease, % 55
≥ 2.0 log10 HIV-1 RNA decrease, % 48
HIV-1 RNA < 50 copies/mL, % 43
HIV-1 RNA < 200 copies/mL, % 50
Mean HIV-1 RNA decrease from BL, log10 1.6
*Primary endpoint; P < .0001 vs 3% at end of control period.
TMB-301: Safety
• 9 pts reported 17 serious AEs[1]
– 1 drug-related serious AE (IRIS) resulted in discontinuation
• 9 other pts discontinued
– Death (n = 4; liver failure, Kaposi sarcoma; end-stage AIDS, lymphoma)
– Consent withdrawal (n = 3)
– Lost to follow-up (n = 2)
• No cases of anti-ibalizumab antibodies
• Phase III TMB-311 study ongoing; extension for pts from TMB-301; accepting new pts[2]
• IM dosing may be viable as administration route as compared with IV dosing[3]
1. Lewis S, et al. CROI 2017. Abstract 449LB. 2. ClinicalTrials.gov. NCT02707861. 3. Lin
H, et al. CROI 2017. Abstract 438.
Agent MoA or Formulation Phase Dosing/
Administration Implications
GS-CA1[1] HIV capsid inhibitor Pre-
clinical
Extended release, suitable for SC of solid
depot formulation
Potent ART with orthoganol resistance profile to existing ART; potential for long-acting formulation due to low aqueous solubility, high stability
GS-9131[2] NRTI Pre-
clinical Potential for once daily
dosing
Potent ART active against NRTI RAMs K65R, L74V, M184V alone or in combination; minimal loss of susceptibility with 4 or more TAMs
MK-8591[3]
Nucleoside Reverse Transcriptase Translocation
Inhibitor (NRTTI)
I 10 mg QW PO; potential
for extended duration
Comparable MK-8591 levels in animal rectal, vaginal tissue to TDF levels in tissues of human subjects highlights potential prophylaxis utility
GS-PI1[4] PI Pre-
clinical Potential for unboosted,
QD dosing
Potent ART with high barrier to resistance, including < 2-fold loss in potency against major PI RAMs, and 10-fold to 40-fold longer in vivo half life vs ATV or DRV
Additional Investigational Agents Reported
at CROI 2017: Preclinical and Phase I
1. Tse WC, et al. CROI 2017. Abstract 38. 2. White KL, et al. CROI 2017. Abstract 436. 3. Grobler J, et al. CROI 2017.
Abstract 435. 4. Link JO, et al. CROI 2017. Abstract 433.
Additional Investigational Agents
Reported at CROI 2017: Phase II
1. Bekker L-G, et al. CROI 2017. Abstract 421LB. 2. Murphy R, et al. CROI 2017.
Abstract 452LB. 3. Wang C-Y, et al. CROI 2017. Abstract 450LB.
Agent MoA or
Formulation Phase
Dosing/ Administration
Implications
TMC278 LA[1] LA injectable
RPV (IM) II 1200 mg IM Q8W Potential as injectable, long-acting PrEP
Elsulfavirine[2] Prodrug of new NNRTI VM1500A
IIb Combined therapy: 20 mg elsulfavirine + FTC/TDF PO QD
Less toxic alternative to EFV for initial ART
UB-421[3] Anti-CD4
receptor mAb II
10 mg/kg QW IV or 25 mg/kg Q2W IV
Possible ART alternative for maintenance therapy in virologically suppressed pts