Importance of Anatomical Efficacy for Disease Control in Neovascular AMD: An Expert Opinion

Emerging clinical evidence of a dual role for Ang-2 and VEGF-A blockade with faricimab in retinal diseases

Anti-vascular endothelial growth factor (VEGF) therapies have transformed the treatment of retinal diseases. However, VEGF signaling is only one component of the complex, multifactorial pathophysiology of retinal diseases, and many patients have residual disease activity despite ongoing anti-VEGF treatment. The angiopoietin/tyrosine kinase with immunoglobulin and epidermal growth factor receptor-2 (Ang/Tie2) signaling pathway is critical to endothelial cell homeostasis, survival, integrity, and vascular stability. Ang-2 can interfere with Ang-1/Tie2 signaling and is increased in several retinal diseases. Lack of Tie2 signaling due to elevated Ang-2 levels drives vascular instability through pericyte dropout, neovascularization, vascular leakage, inflammation, and fibrosis. Although Ang-2 and VEGF can synergistically promote vascular instability and neovascularization, Ang-2 may also mediate vascular instability independently of VEGF. Faricimab is a bispecific antibody designed for intraocular use that inhibits two distinct pathways via Ang-2 and VEGF-A blockade. Clinical biomarkers of vascular instability are important for evaluating disease control and subsequent treatment decisions. These biomarkers include measurement/evaluation with optical coherence tomography (OCT) of intraretinal fluid, subretinal fluid, central subfield thickness, and pigment epithelial detachments (PEDs), and fluorescein angiography imaging of macular leakage and PEDs. Hyperreflective foci (HRF), thought to be representative of activated microglia, indicating an inflammatory microenvironment, and epiretinal membranes (ERMs), a marker for retinal fibrotic proliferation in diabetic macular edema (DME), are both also identified using OCT. Here we summarize data (secondary endpoint and prespecified exploratory analyses as well as post hoc analyses) from six Phase III trials suggest that dual therapy Ang-2/VEGF-A inhibition with faricimab (6 mg) has a greater effect on reducing/resolving biomarkers of vascular instability than aflibercept (2 mg), by both controlling neovascularization and vascular leakage (with resultant resolution of exudation associated with DME, neovascular age-related macular degeneration, and retinal vein occlusion), as well as by targeting inflammation (reduction of HRF in DME) and retinal fibrotic proliferation (reducing the risk of ERMs in eyes with DME). Modulation of both the Ang-2 and VEGF-A pathways with faricimab may therefore provide greater disease control than anti-VEGF monotherapy, potentially leading to extended treatment durability and improved long-term outcomes.

Anatomic Outcomes with Faricimab vs Aflibercept in Head-to-Head Dosing Phase of the TENAYA/LUCERNE Trials in Neovascular Age-related Macular Degeneration

PURPOSE

To compare early anatomic outcomes after treatment with faricimab versus aflibercept in a pooled analysis of the head-to-head dosing phase of the TENAYA/LUCERNE trials in neovascular age-related macular degeneration (nAMD).

DESIGN

TENAYA/LUCERNE (NCT03823287/NCT03823300) were identical, randomized, double-masked, active comparator-controlled phase 3 noninferiority trials.

PARTICIPANTS

Patients aged ≥ 50 years with treatment-naïve nAMD.

METHODS

Patients were randomized (1:1) to intravitreal faricimab 6.0 mg up to every 16 weeks (Q16W) after 4 initial doses every 4 weeks (Q4W) or aflibercept 2.0 mg every 8 weeks (Q8W) after 3 initial doses given Q4W.

MAIN OUTCOME MEASURES

Post hoc analyses comparing faricimab with aflibercept in terms of change in central subfield thickness (CST) from baseline and proportion of patients with an absence of subretinal fluid (SRF) and intraretinal fluid (IRF) during initial 12-week head-to-head dosing phase, when both arms received 3 injections, and time to first absence of IRF and SRF.

RESULTS

A total of 1329 patients were enrolled across TENAYA/LUCERNE (n = 665 faricimab; n = 664 aflibercept). There were greater (nominal P < 0.0001) reductions in adjusted mean CST from baseline with faricimab versus aflibercept at weeks 4, 8, and 12, with comparable vision outcomes. At week 12, more patients (95% confidence interval) achieved an absence of SRF (87.9% [85.4%-90.4%] vs. 79.0% [76.0%-82.1%]) and both IRF and SRF (77.2% [74.0%-80.4%] vs. 66.5% [62.9%-70.0%]) but not IRF (88.4% [86.0%-90.8%] vs. 85.0% [82.3%-87.6%]), with faricimab versus aflibercept, respectively. In patients with IRF or SRF at baseline (n = 581 faricimab; n = 591 aflibercept), the 75th percentile of time to first absence of IRF and SRF was reached at week 8 with faricimab and week 12 with aflibercept. At week 12, cumulative incidence of first-time absence of IRF and SRF was 85.5% (82.3%-88.1%) with faricimab and 75.0% (71.3%-78.3%) with aflibercept.

CONCLUSIONS

Faricimab resulted in greater improvement in anatomic outcomes than aflibercept during the head-to-head dosing phase and a faster time to first absence of retinal fluid.

FINANCIAL DISCLOSURE(S)

Proprietary or commercial disclosure may be found after the references.

Faricimab for neovascular age-related macular degeneration and diabetic macular edema: from preclinical studies to phase 3 outcomes

Intravitreal anti-vascular endothelial growth factor (VEGF) therapy is the standard of care for diabetic macular edema (DME) and neovascular age-related macular degeneration (nAMD); however, vision gains and anatomical improvements are not sustained over longer periods of treatment, suggesting other relevant targets may be needed to optimize treatments. Additionally, frequent intravitreal injections can prove a burden for patients and caregivers. Angiopoietin-2 (Ang-2) has been explored as an additional therapeutic target, due to the involvement of Ang-2 in DME and nAMD pathogenesis. Recent evidence supports the hypothesis that targeting both VEGF and Ang-2 may improve clinical outcomes in DME and nAMD compared with targeting VEGF alone by enhancing vascular stability, resulting in reduced macular leakage, prevention of neovascularization, and diminished inflammation. Faricimab, a novel bispecific antibody that targets VEGF-A and Ang-2, has been evaluated in clinical trials for DME (YOSEMITE/RHINE) and nAMD (TENAYA/LUCERNE). These trials evaluated faricimab against the anti-VEGFA/B and anti-placental growth factor fusion protein aflibercept, both administered by intravitreal injection. In addition to faricimab efficacy, safety, and pharmacokinetics, durability was evaluated during the trials using a treat-and-extend regimen. At 1 year, faricimab demonstrated non-inferior vision gains versus aflibercept across YOSEMITE/RHINE and TENAYA/LUCERNE. In YOSEMITE/RHINE, faricimab improved anatomic parameters versus aflibercept. Reduction of central subfield thickness (CST), and absence of both DME and intraretinal fluid were greater in faricimab- versus aflibercept-treated eyes. In TENAYA/LUCERNE, CST reductions were greater for faricimab than aflibercept at the end of the head-to-head phase (0-12 weeks), and were comparable with aflibercept at year 1, but with less frequent dosing. CST and vision gains were maintained during year 2 of both YOSEMITE/RHINE and TENAYA/LUCERNE. These findings suggest that dual Ang-2/VEGF-A pathway inhibition may result in greater disease control versus anti-VEGF alone, potentially addressing the unmet needs and reducing treatment burden, and improving real-world outcomes and compliance in retinal vascular diseases. Long-term extension studies (RHONE-X, AVONELLE-X) are ongoing. Current evidence suggests that dual inhibition with faricimab heralds the beginning of multitargeted treatment strategies inhibiting multiple, independent components of retinal pathology, with faricimab providing opportunities to reduce treatment burden and improve outcomes compared with anti-VEGF monotherapy.

The effect of four loading intravitreal aflibercept injections on macular fluid in treatment-naïve neovascular age-related macular degeneration

PURPOSE

To evaluate the effect of four versus three loading aflibercept injections on macular fluid resolution and visual acuity (VA) in exudative neovascular AMD (nAMD).

METHODS

Multicentre, retrospective cohort study of treatment naïve nAMD eyes undergoing 3 versus 4 loading doses of aflibercept. Change in VA and fluid resolution on optical coherence tomography (OCT), were evaluated at 8 weeks post loading. The primary outcome was proportion of patients with no intraretinal (IRF) and/or subretinal (SRF) fluid at central 1 mm and whole macula at 8 weeks after loading. Data were summarised with mean ± SD for continuous variables, and n (%) for categorical variables.

RESULTS

Data from 995 patients was analysed (355 patients - 4 loading doses and 640-3 loading doses). At 8 weeks post 4 loading doses proportion of eyes with neither IRF nor SRF, no IRF and no SRF were 62.8%, 88.7% and 79.2% at fovea versus 56.1%, 87.9% and 69.9% in the whole macula, respectively. Fluid resolution at both fovea and macula were significantly higher in eyes with 4 loading injections versus 3 (p = 0.0001). The mean VA change was +4.0 (±11.3) and +5.4(±13.3) letters for 3 and 4 loading doses groups (p = 0.09).

CONCLUSION

Four loading dose injections of aflibercept results in higher proportion of eyes with total fluid resolution in the central subfield and total macular scan when compared to those receiving 3 loading dose injections at 8 weeks post loading phase. However, the better drying effect of 4th loading dose does not translate into better short-term VA outcomes.

Knowledge, attitude, and practice of non-emergency surgical patients toward anesthesia

This study aimed to investigate the knowledge, attitude, and practice (KAP) of non-emergency surgical patients toward anesthesia. This cross-sectional study was conducted between May and October 2023 at Zibo Central Hospital among non-emergency surgical patients. A total of 429 valid questionnaires were enrolled (mean age: 42.81 ± 13.17 years old; 227 (52.91%) females). The mean KAP scores were 7.79 ± 3.95 (possible range: 0-18), 32.35 ± 2.80 (possible range: 8-40), and 18.14 ± 3.96 (possible range: 6-24), respectively. Multivariate logistic regression analysis showed that knowledge (OR = 1.095, 95% CI 1.036-1.158, P = 0.001) and previous poor anesthesia experience (OR = 0.081, 95% CI 0.017-0.386, P = 0.002) were independently associated with practice. Non-emergency surgical patients had inadequate knowledge, positive attitude, and proactive practice towards anesthesia. It is crucial for healthcare professionals to implement targeted educational interventions to inform patients about the anesthesia process, potential risks, and benefits.

Subretinal Fluid Resolution and Visual Acuity in Patients with Neovascular Age-Related Macular Degeneration: A HARBOR Post Hoc Analysis

OBJECTIVE

To determine the effect of subretinal fluid (SRF) resolution on visual acuity in patients with neovascular age-related macular degeneration (nAMD) from the HARBOR trial.

DESIGN

Post hoc analysis of the HARBOR trial (a phase 3, double-masked, randomized, active treatment-controlled trial of ranibizumab conducted between July 2009 and August 2012 [NCT00891735]) was carried out from January 2020 to July 2021.

PARTICIPANTS

Treatment-naive patients with nAMD and active subfoveal choroidal neovascularization (N = 1097). Multiple intervention arms were pooled for this analysis if SRF was present at baseline and intraretinal fluid/SRF resolved during the study, based on spectral-domain OCT (n = 349).

INTERVENTION

Three monthly loading doses followed by intravitreal injections of 0.5-mg or 2.0-mg ranibizumab were administered monthly or pro re nata over 24 months.

MAIN OUTCOME MEASURES

Mean change in ETDRS best-corrected visual acuity (BCVA) between the month before SRF resolution and the month of SRF resolution detection. Visual outcomes at months 12 and 24 were analyzed in eyes without SRF recurrence after SRF resolution. The proportion of patients who lost ≤ 4 letters were considered as vision gainers/maintainers and those who lost ≥ 5 were considered as vision losers.

RESULTS

Of 349 patients, 32 patients (9%) lost ≥ 5 ETDRS letters (mean [95% confidence interval (CI)], -9.9 letters [-12.0, -7.9]) and 317 (91%) of the eyes gained/maintained BCVA (mean, 6.1 letters [95% CI, 5.3, 6.8]) between the month before SRF resolution and the month of SRF resolution. There were no differences in baseline ocular characteristics between patient groups. Among eyes without SRF recurrence after SRF resolution (64%; 224/349), eyes that lost ≥ 5 ETDRS letters compared with those that gained/maintained letters at the time of SRF resolution had reduced visual outcome gains from baseline to month 12 (1.4 vs. 12.9 letters) and month 24 (0.0 vs. 12.6 letters).

CONCLUSIONS

A greater proportion of ranibizumab-treated eyes with nAMD gained/maintained visual acuity at SRF resolution. Approximately 9% of eyes lost vision during SRF resolution; these eyes had reduced final visual acuity gains at 12 and 24 months. Further analyses are warranted to investigate potential underlying factors and discuss the treatment implications if confirmed.