Eye Drop with Fas-Blocking Peptide Attenuates Age-Related Macular Degeneration

Age-related macular degeneration (AMD), characterized by macular retinal degeneration, poses a significant health concern due to the lack of effective treatments for prevalent dry AMD. The progression of AMD is closely linked to reactive oxygen species and Fas signaling, emphasizing the need for targeted interventions. In this study, we utilized a NaIO3-induced retinal degeneration mouse model to assess the efficacy of Fas-blocking peptide (FBP). Intravitreal administration of FBP successfully suppressed Fas-mediated inflammation and apoptosis, effectively arresting AMD progression in mice. We developed a 6R-conjugated FBP (6R-FBP) for eye drop administration. 6R-FBP, administered as an eye drop, reached the retinal region, attenuating degeneration by modulating the expression of inflammatory cytokines and blocking Fas-mediated apoptosis in rodent and rabbit NaIO3-induced retinal degeneration models to address practical concerns. Intravitreal FBP and 6R-FBP eye drops effectively reduced retinal degeneration and improved retinal thickness in rodent and rabbit models. This study highlights the therapeutic potential of FBP, particularly 6R-FBP as an eye drop, in inhibiting Fas-mediated cell signaling and protecting against retinal cell death and inflammation in dry AMD. Future investigations should explore the translational prospects of this approach in primates with eye structures comparable to those of humans.

Decrease in Anti-VEGF Injections After Post-injection Endophthalmitis in Patients With Neovascular Age-Related Macular Degeneration

Introduction: To evaluate the effect of antivascular endothelial growth factor (anti-VEGF)-related endophthalmitis on intravitreal injection (IVI) frequency in patients with neovascular age-related macular degeneration (nAMD). Methods: A retrospective chart review was performed of all cases of post IVI endophthalmitis that occurred in Edmonton, Alberta, Canada, between 2012 and 2019. Contralateral eyes affected by nAMD but without endophthalmitis served as a control group. The main outcome measures were the frequency of anti-VEGF injections, visual acuity, and activity of choroidal neovascularization before and after endophthalmitis. Results: Seventeen eyes met the inclusion criteria, 2 (12%) of which never resumed IVI after endophthalmitis because of the quiescence of disease. Post-endophthalmitis eyes received IVI less frequently in the 1 year after endophthalmitis (mean 0.52 ± 0.42 IVI/month) than those that received IVI 1 year before endophthalmitis (1.09 ± 0.36 IVI/month) (P = .001). The 17 contralateral eyes also received anti-VEGF injections less frequently after endophthalmitis than before (P = .001). There was no significant change in optical coherence tomography markers of disease activity in cases or controls. Conclusions: In patients with nAMD, endophthalmitis resolution is associated with a decrease in anti-VEGF injection frequency. The same decrease in anti-VEGF injection frequency is also seen in contralateral eyes unaffected by endophthalmitis. Markers of disease activity remain unchanged in both eyes, suggesting disease quiescence despite reduced IVI frequency.

Clinical Outcomes of Retinal Arterial Macroaneurysms With Vitreous Hemorrhage Treated With Observation, Antivascular Endothelial Growth Factor Intravitreal Injections, or Pars Plana Vitrectomy

Purpose: To evaluate the clinical outcomes of different types of treatment of retinal arterial macroaneurysm with vitreous hemorrhage. Methods: This retrospective cohort study comprised patients with retinal arterial macroaneurysm and vitreous hemorrhage who were examined at a single retina clinic between 2013 and 2021. Results: Treatment arms included observation (n = 33), intravitreal injections (IVIs) of antivascular endothelial growth factor agents (n = 5), and pars plana vitrectomy (PPV; n = 12). Baseline characteristics and final best-corrected visual acuity (BCVA) were similar in a combined analysis of all treatment groups (P > .05). The BCVA improved in all eyes, but the IVI and PPV arms had worse presenting BCVA. The mean number of injections was 3.6 ± 2.8. The incidence of subretinal hemorrhage was 18.2% in the observation arm, 25.0% in the PPV group (8.3% had subretinal tissue plasminogen activator), and 60.0% in the IVI group. The mean time to intervention was 13 ± 15.3 days for PPV and 38 ± 69.9 days for IVI. There was no correlation between the number of injections and the final BCVA (r = 0.13, P = .830). The IVI and PPV arms were more frequently on anticoagulants (P = .011). There was no difference in final BCVA between those using anticoagulants (0.52 ± 0.53) vs not using anticoagulants (0.55 ± 0.65) (P = .870). Conclusions: Most patients, regardless of treatment modality, demonstrated significantly improved BCVA and similar final visual outcomes. Patients with worse presenting BCVA were more likely to undergo PPV or IVI whereas those with better presenting BCVA had excellent outcomes with observation alone. Improved BCVA was not associated with the number of IVIs or anticoagulant use.

Severe cutaneous adverse reactions associated with immune checkpoint inhibitors therapy and anti-VEGF combination therapy: a real-world study of the FDA adverse event reporting system

BACKGROUND

Immune checkpoint inhibitors (ICIs) therapy combined with anti-vascular endothelial growth factor (anti-VEGF) regimens showed new hope for cancer patients and considered as future pillar of cancer therapy. However, severe cutaneous adverse reactions (SCARs) in patients with ICIs and anti-VEGF combined therapy raise a serious concern and remain thoroughly assessed in clinics.

RESEARCH DESIGN AND METHODS

Data retrieved from the first quarter of 2004 to the third quarter of 2022 in FAERS database underwent disproportionality analysis and Bayesian analysis were utilized to detect and assess the SCAR signals of ICIs and ICIs and anti-VEGF combined therapy for comparison.

RESULTS

In total, 854 (1.10%) and 80 (1.06%) reports on SCARs associated with ICIs and a combination of ICIs and anti-VEGF therapy, respectively, were analyzed. Most of SCARs reports were associated with the use of pembrolizumab (36.01%), nivolumab (23.97%) and a combination of ipilimumab and nivolumab (19.71%). A use of atezolizumab and bevacizumab combined therapy (60.00%) caused the most SCARs records out of ICIs and anti-VEGF combined therapies.

CONCLUSIONS

Treatment with joint therapy of ICIs and anti-VEGF agents may cause severe cutaneous adverse events. It is vital to identify ICI-related SCARs early, and to manage them appropriately.

Reduced Incidence of Intravitreal Injection-Related Endophthalmitis With Prefilled Syringes

Purpose: To evaluate the incidence and clinical characteristics of intravitreal injection-related endophthalmitis cases with antivascular endothelial growth factor (anti-VEGF) medications manufactured as prefilled syringes or non-prefilled preparations. Methods: This retrospective chart review comprised eyes that received intravitreal anti-VEGF at a single-specialty retina practice from January 1, 2014, to December 31, 2019. Eyes diagnosed with injection-related endophthalmitis were identified. Demographic and clinical data were abstracted from medical records, including the type of anti-VEGF agent, baseline and follow-up corrected visual acuity (VA), and microbiologic findings. Results: The review identified 88 cases of intravitreal anti-VEGF injection-related endophthalmitis and 325 990 total injections. Total injections included 32 045 (9.8%) bevacizumab (BEV), 93 073 (28.6%) ranibizumab (RAN), 122 947 (37.7%) aflibercept (AFL), and 77 925 (23.9%) ranibizumab prefilled syringe (RANPFS). Ten of the endophthalmitis cases were related to BEV, 21 to RAN, 45 to AFL, and 12 to RANPFS. The endophthalmitis rate was lowest for RANPFS (0.0154%) (BEV, 0.0312%; RAN, 0.0226%; AFL, 0.0366%) (P = .030). Thirty-four (41.5%) of 82 samples were culture positive. RANPFS had a significantly lower rate of culture-proven postinjection endophthalmitis than the other agents (P = .003). The mean VA for endophthalmitis cases related to RANPFS vs non-prefilled agents was similar at presentation (Snellen 20/2092 vs 20/2327) and at the 3-month follow-up (Snellen 20/201 vs 20/272) (both P > .05). Conclusions: Anti-VEGF medications in prefilled syringes may reduce the risk for medication contamination during injection preparation. RANPFS was associated with a lower rate of injection-related endophthalmitis than non-prefilled anti-VEGF medications.

Ocular Pharmacokinetic Properties of Intravitreally Injected Aflibercept in Rabbits After Using Brinzolamide/Timolol Eye Drops

Purpose: To investigate the ocular pharmacokinetic properties of intravitreally injected aflibercept in rabbits after using brinzolamide 1%/timolol maleate 0.5% fixed-combination eye drops. Methods: The right eye of 5 rabbits was topically administered 30 μL of brinzolamide and timolol maleate eye drops twice a day (q12h). The 2 eyes of each rabbit were injected with 1.0 mg (0.025 cc) of aflibercept on the 2nd day after instilling the eye drops. The intraocular pressure of the rabbits was measured before injection and sampling. The aqueous humor was drawn at 1, 3, 7, 14, 21, and 28 days. Aflibercept concentrations in aqueous humor and vitreous humor (28 days) were measured by enzyme-linked immunosorbent assay. Results: The aflibercept aqueous concentrations in the right eye at days 7, 14, 21, and 28 after injection were all significantly higher than those in the left eye (P > 0.05, n = 5). The peak aqueous concentrations of aflibercept in right eyes (49.5 μg/mL) and left eyes (50.9 μg/mL) were both observed at 1 day after injection. The elimination half-life of aflibercept in the aqueous humor of the right eye (4.70 days) was 1 day longer than that of the left eye (3.65 days). The average percentage of residual aflibercept in the vitreous humor of the right eye (3.35%) was also significantly higher than that of the left eye (0.63%). Conclusions: Brinzolamide 1%/timolol maleate 0.5% fixed-combination eye drops can significantly extend the ocular residence time of intravitreally injected aflibercept.

Novel and investigational therapies for wet and dry age-related macular degeneration

Age-related macular degeneration (AMD) is a macular degenerative eye disease, the major cause of irreversible loss of central vision. In this review, we highlight current progress and future perspectives of novel and investigational therapeutic strategies in the drug pipeline, including anti-vascular endothelial growth factor (VEGF) agents, bispecific antibodies, biosimilars, small molecules, gene therapy, and long-acting drug delivery strategies for both dry and wet AMD. We anticipate that biologics with dual functionalities and combined therapies with long-acting capabilities will lead the wet AMD pipeline. Sustained-release platforms also show potential. However, significant breakthroughs are yet to be made for dry AMD. The personalized approach might be well suited in the scenario of diverse genetic variations in both conditions. Teaser: AMD is the leading cause of global blindness in the developed world. This article highlights investigational therapeutics, such as antibodies, Bi-specifics, small molecules, biosimilars, gene therapy and long-acting strategies (Port Delivery System), for this condition.

Anti-PD-1 Monoclonal Antibody Combined With Anti-VEGF Agent Is Safe and Effective in Patients With Recurrent/Metastatic Head and Neck Squamous Cancer as Second-Line or Beyond Treatment

Background

Numerous preclinical studies have revealed the complex regulatory mechanisms between anti-angiogenesis and immune inhibition in the tumor immune microenvironment and have proposed the efficacy of combined immunotherapy and anti-angiogenic treatment. Moreover, the combination strategy had been confirmed in a number of clinical trials. In this study, we aimed to evaluate the safety and efficacy of this combination strategy in recurrent/metastatic head and neck squamous cell carcinoma.

Methods

In this real-world study, 43 patients who received the combination of programmed cell death protein 1 (PD-1) inhibitors and anti-vascular endothelial growth factor (VEGF) agents in Zhejiang cancer hospitals between March 2019 and December 2020 were reviewed. Clinical characteristics and follow-up data were collected, and the preliminary efficacy and safety of the combination therapy were assessed.

Results

The median follow-up time was 12.4 months (range, 3.7-25.3 months), and the follow-up rate was 100%. The median duration of exposure was 9.5 months. Thirty-seven patients (86.0%) reported treatment-related adverse events (TRAEs) of any grade. The most frequently reported events were fatigue, decreased appetite, and hypertension. Grade 3 TRAEs occurred in 8 patients (18.6%), and no grade 4 or 5 TRAEs occurred. Twenty-four patients (55.9%) had an overall response to treatment: 6 (14.0%) had a complete response and 18 (41.9%) had a partial response. In addition, 5 (11.6%) patients had stable disease, and the disease control rate 12 was 67.4%. The median time to response was 1.6 months (range, 1.1-2.8 months). The median progression-free survival (PFS) was not reached, and the 1-year PFS rate was 69.1%. The 1-year overall survival (OS) rate was 87.7%. Patients with primary tumors located in the nasopharynx had better OS than those with tumors outside the nasopharynx. ECOG PS were related to PFS; patients with an ECOG PS of 0 had a slight survival advantage.

Conclusion

The combination strategy of anti–PD-1 monoclonal antibodies and anti-VEGF agents was tolerable in patients with recurrent/metastatic head and neck cancer. This treatment exhibited antitumor potential despite the heavily pretreated population.

Optical Coherence Tomography Angiography Biomarkers Predict Anatomical Response to Bevacizumab in Diabetic Macular Edema

PURPOSE

To identify biomarkers that may predict an early anatomical response to the treatment of diabetic macular edema (DME) with intravitreal bevacizumab (IVB) by means of optical coherence tomography angiography (OCTA).

METHODS

This study is a retrospective study of treatment-naïve patients with DME who underwent 6 × 6 mm OCTA imaging of the macula at baseline and after three monthly IVB injections. Thirty-six eyes of 23 patients were included. Eyes that demonstrated evidence of an early anatomical response, consisting of a >10% decrease in central macular thickness (CMT) (n = 18), were compared with those eyes that failed to show such an improvement (n = 18).

RESULTS

At baseline, early-response eyes had worse starting best-corrected visual acuity (BCVA, LogMAR 0.84 ± 0.41 versus LogMAR 0.51 ± 0.15, p = 0.004) and a larger CMT (490 ± 135 µm versus 356 ± 33 µm, p = 0.001), but smaller foveal avascular zones (FAZ) (0.309 ± 0.098mm versus 0.413 ± 0.095 mm, p = 0.003) compared with eyes that proved refractory to three monthly injections of IVB. The vascular density (VD) in both the foveal superficial and deep capillary plexuses was significantly greater in eyes that showed an early-treatment response compared with eyes that were non-responders (24.86 ± 6.90% versus 19.98 ± 7.13%, p = 0.045 and 32.30 ± 4.88% versus 26.95 ± 7.25%, p = 0.028, respectively). Early-treatment response to IVB was predicted by starting CMT (r ²= 0.266, p = 0.001), FAZ size (r ²= 0.234, p = 0.003), and VD in the superficial parafovea (r ²= 0.217, p = 0.004) and deep fovea (r ²= 0.157, p = 0.037).

CONCLUSION

Projection-resolved OCTA may be useful in predicting an early anatomical response of DME to treatment with IVB.

[Pharmacological modulation of wound healing in glaucoma surgery]

Despite the well-known effectiveness of pharmacological glaucoma therapy, surgical approach remains one of the main treatment options for some forms and stages of the disease. The long-term success of glaucoma surgery depends on the intensity of local wound healing processes at the surgical site. The most common way to influence healing processes in surgical treatment of glaucoma is the use of antimetabolites. However, given the high risk of serious complications associated with their use, the search for new drugs devoid of these disadvantages continues. The aim of this review is to describe the efficacy and safety of both currently used and upcoming pharmacological ways to influence the wound healing process after glaucoma surgery in order to improve the stability of hypotensive effect.

Intravitreal Anti-Vascular Endothelial Growth Factor Agents for the Treatment of Diabetic Retinopathy: A Review of the Literature

Background: Diabetic retinopathy (DR) is the leading cause of blindness in the working-age population. The purpose of this review is to gather the existing literature regarding the use of the approved anti-vascular endothelial growth (anti-VEGF) agents in the treatment of DR. Methods: A comprehensive literature review in PubMed engine search was performed for articles written in English language up to 1 July 2021, using the keywords “diabetic retinopathy”, “ranibizumab”, “aflibercept”, and “anti-VEGF”. Emphasis was given on pivotal trials and recent robust studies. Results: Intravitreal anti-VEGF agents have been found to significantly improve visual acuity and reduce retinal thickness in patients with diabetic macular edema (DME) in a long-term follow-up ranging from 1 to 5 years and are considered the standard-of-care in such patients. Regarding DR, intravitreal anti-VEGF agents provided ≥2-step improvement in DR severity on color fundus photography in about 30–35% of patients with NPDR at baseline, in the majority of clinical trials originally designed to evaluate the efficacy of intravitreal anti-VEGF agents in patients with DME. Protocol S and CLARITY study have firstly reported that intravitreal anti-VEGF agents are non-inferior to panretinal photocoagulation (PRP) in patients with proliferative DR (PDR). However, the use of new imaging modalities, such as optical coherence tomography-angiography and wide-field fluorescein angiography, reveals conflicting results about the impact of anti-VEGF agents on the regression of retinal non-perfusion in patients with DR. Furthermore, one should consider the high “loss to follow-up” rate and its devastating consequences especially in patients with PDR, when deciding to treat the latter with intravitreal anti-VEGF agents alone compared to PRP. In patients with PDR, combination of treatment of intravitreal anti-VEGF agents and PRP has been also supported. Moreover, in the specific case of vitreous hemorrhage or tractional retinal detachment as complications of PDR, intravitreal anti-VEGF agents have been found to be beneficial as an adjunct to pars plana vitrectomy (PPV), most commonly given 3–7 days before PPV, offering reduction in the recurrence of vitreous hemorrhage. Conclusions: There is no general consensus regarding the use of intravitreal anti-VEGF agents in patients with DR. Although anti-VEGF agents are the gold standard in the treatment of DME and seem to improve DR severity, challenges in their use exist and should be taken into account in the decision of treatment, based on an individualized approach.

Survey of Intravitreal Injection Techniques Among Retina Specialists in Mexico

Purpose

To report technique preferences for intravitreal injections among retina specialists in Mexico.

Methods

Cross-sectional survey. Ophthalmologists with a two-year retina training, active members of the Mexican Retina Association, were contacted through email to answer a survey consisting of 37 items regarding their IVI application technique.

Results

A total of 133 retina specialists participated, with a response rate of 78%. Forty-five percent applied the intravitreal injections in an operating room designated for the procedure. Sixty-three percent reported never injecting both eyes on the same day. Ninety-six percent wore a face mask during the procedure and 91% wore gloves. Eighty-two percent used a lid speculum. Tetracaine drops were the anesthetic method employed by 97% of participants. All participants utilized povidone-iodine for antisepsis. Eighty percent measured the puncture site with a caliper. Superotemporal quadrant was the one chosen to place the injection by 63% of participants. Fifty-nine percent indicated post-injection antibiotic drops for several days. Post-injection counting fingers visual acuity was verified by 53% of the participants. Fifty-six percent of the participants placed an eye-patch after the procedure.

Conclusion

There are different practices regarding the application of intravitreal injections among retina specialists in Mexico. Performing this type of survey periodically could show changes in preferences, as new evidence is incorporated into clinical practice.

Development of a 1-year risk-prediction nomogram for good functional response with anti-VEGF agents in naive diabetic macular oedema

PURPOSE

To develop a risk-prediction nomogram based on baseline variables for good functional response during the 1st year of treatment with anti-VEGF agents in naive diabetic macular oedema (DME).

METHODS

This retrospective study included patients presenting naive-DME treated with anti-VEGF therapy at Dijon University Hospital (France) between 1 February 2012 and 31 March 2015 (derivation cohort). We studied baseline variables that had significant associations with a good functional response to anti-VEGF agents during the 1st year of treatment. We used a program to generate a nomogram based on a binary logistic regression predictive model. Then, this nomogram was tested on data from a separate cohort of naive-DME patients from a multicenter study involving 20 French ophthalmologic centres between January 2014 and June 2015 (validation cohort).

RESULTS

Age, baseline BCVA and ellipsoid zone integrity on spectral-domain optical coherence tomography (SD-OCT) are functional prognostic factors and were used to build a nomogram. The nomogram showed excellent discrimination for good functional responders (area under the curve (AUC) = 0.906, 95% confidence interval (95% CI) = [0.849-0.964], p = 0.004). The discriminative power of this nomogram was tested on the validation cohort data, demonstrating good discrimination of good functional responders (AUC = 0.942, 95% CI = [0.898-0.986], p < 0.001).

CONCLUSION

This nomogram provides a useful estimation of a good functional response in naive-DME patients treated with anti-VEGF agents.

Intraocular pharmacokinetics of anti-vascular endothelial growth factor agents by intraoperative subretinal versus intravitreal injection in silicone oil-filled eyes of proliferative diabetic retinopathy: a randomized controlled pilot study

PURPOSE

Intraoperative subretinal anti-vascular endothelial growth factor (VEGF) injections have been used clinically in some case, but the pharmacokinetic characteristics have not yet been determined. In this pilot study, we investigate the pharmacokinetic parameters of anti-VEGF agents by intraoperative subretinal or intravitreal injection in silicone oil (SiO)-filled eyes of patients with proliferative diabetic retinopathy (PDR).

METHODS

Randomized controlled trial including 13 patients (16 eyes) with PDR underwent pars plana vitrectomy (PPV) with SiO tamponade and randomly received a subretinal (8 eyes) or intravitreal (8 eyes) conbercept injection (0.5 mg/0.05 ml) intraoperatively. Aqueous humour (AH) was obtained on the 1st, 3rd, 7th, 10th, 14th, 21st and 28th day after the injection. Drug concentrations in the AH were determined by enzyme-linked immunosorbent assay (ELISA). The last best-corrected visual acuity (BCVA) was examined 6 months postoperatively.

RESULTS

The clearance rate of anti-VEGF agents by subretinal injection was reduced in vitrectomized eyes with SiO tamponade (p < 0.05). With the same drug dose, subretinal injection (5.49 ± 6.11 μg/ml) resulted in higher drug concentrations in the AH when compared with intravitreal injection (0.42 ± 0.46 μg/ml, p = 0.001) 4 weeks after the treatment. The mean residence time last (MRT_0-t ) by subretinal injection (11.57 ± 0.83 days) was significantly longer than the mean MRT_0-t by intravitreal injection (7.10 ± 1.00 days, p < 0.001). A self-paired analysis showed that subretinal injection led to the BCVA improvement by +28.59 letters 6 months postoperatively (p = 0.028) while the BCVA did not improve significantly by intravitreal injection (p = 0.715).

CONCLUSIONS

The drug maintenance phase was prolonged by intraoperative subretinal injection in SiO-filled eyes of PDR. The results suggest that subretinal injection might be a valuable treatment option for the management of PDR.

Comparison of intravitreal anti-vascular endothelial growth factor agents and treatment results in Irvine-Gass syndrome

AIM

To compare the efficacy of bevacizumab, ranibizumab, and aflibercept in pseudophakic cystoid macular edema (CME) patients with Irvine-Gass syndrome (IGS).

METHODS

This study is designed as retrospective consecutive case series. Those who developed postoperative pseudophakic CME that refractory to topical treatment and were treated with anti-vascular endothelial growth factor (VEGF) agents included in the study. Optical coherence tomography (OCT) examination including central macular thickness (CMT), total macular volume (TMV), retinal nerve fiber layer (RNFL), ganglion cell layer (GCL) and choroidal thickness (ChT) measurements at the baseline, 1^st, 3^rd and 6^th month controls were performed.

RESULTS

Fifty-nine eyes of 59 patients with CME and other healthy eyes of the patients (Control group) were evaluated. There were 22 eyes of 22 patients in the bevacizumab group (group 1), 19 eyes of 19 patients in the ranibizumab group (group 2), and 18 eyes of 18 patients in the aflibercept group (group 3). There was no difference in terms of age, gender, axial length, IOP, and spherical equivalent values. The baseline subfoveal and mean ChT were higher in the IGS group. The difference between the baseline and sixth month values of subfoveal and mean ChT were compared in the CME groups, thinning was observed in all three groups. GCL was thinner in the patient group at the 6th month of treatment. The resolution time of CME was observed faster in group 1.

CONCLUSION

All three anti-VEGF agents seem to be effective in CME but bevacizumab appears to be slightly more cost-effective than the other two alternatives.

Nephrotoxicity Associated with Novel Anticancer Agents (Aflibercept, Dasatinib, Nivolumab): Case Series and Nephrological Considerations

Cancer patients have an incidence of about 60% kidney disease development and are at elevated risk of acute renal damage. Kidney disease in these patients is frequently associated with nephrotoxicity from the ongoing oncological treatment. New anticancer therapeutic strategies, such as targeted therapies and immunotherapies, offer substantial benefits in the treatment of many neoplasms. However, their use is associated with significant nephrotoxicity, which qualitatively differs from that seen with traditional cytotoxic chemotherapy, while the underlying mechanisms are complex and still to be clearly defined. Nephrologists need to be knowledgeable about the array of such renal toxicities for effective collaboration with the oncologist in the prevention and management of kidney involvement. Renal adverse effects may range from asymptomatic proteinuria to renal failure, and their prompt identification and timely treatment is essential for optimal and safe care of the patient. In this article, after presenting clinical cases we discuss the differing renal toxicity of three novel anticancer agents (aflibercept, dasatinib, and nivolumab) and possible measures to counter it.

Occlusive Retinal Vasculitis Following Intravitreal Brolucizumab

Purpose

To analyze a case series of retinal vasculitis reported to the American Society of Retina Specialists (ASRS) following Food and Drug Administration approval of brolucizumab for treatment of neovascular age-related macular degeneration.

Methods

The ASRS Research and Safety in Therapeutics Committee analyzed clinical and imaging characteristics from submitted reports of retinal vasculitis after brolucizumab.

Results

Retinal vasculitis was reported in 26 eyes of 25 patients (22 [88%] female) after treatment with brolucizumab. Imaging studies were available for 24 of 26 eyes. Most cases (92%) were associated with intraocular inflammation, which presented at a mean of 25 days (range, 3-63 days) after the most recent brolucizumab injection. Mean visual acuity (VA) was 20/52 (range, 20/25-4/200) before the adverse event, 20/151 (range, 20/25-hand motion) at presentation of the adverse event, and 20/243 (range, 20/30-light perception) at last follow-up. Twelve eyes (46%) had a greater than 3-line decrease in VA at final follow-up, and 12 eyes (46%) had a final VA of 20/200 or worse. Analysis of retinal imaging identified vasculopathy that involved retinal arteries (91%), retinal veins (79%), and choroidal vessels (48%). Occlusive disease was apparent on imaging in 83% of eyes. Treatment approaches were varied.

Conclusions

Retinal vasculitis has been identified in a series of eyes following brolucizumab. Although a few eyes in this series were asymptomatic or minimally symptomatic, some eyes had significant vision loss. A careful examination for signs of active inflammation prior to brolucizumab injection is recommended. Once vasculopathy is suspected, angiographic imaging may help define the spectrum of involvement. Optimal treatment strategies remain unknown.

Usefulness of Liquid Biopsy Biomarkers from Aqueous Humor in Predicting Anti-VEGF Response in Diabetic Macular Edema: Results of a Pilot Study

The objective was to investigate the usefulness of the "liquid biopsy" of aqueous humor (AH) to predict the clinical response after intravitreal injections (IVT) of anti-VEGF agents for treating diabetic macular edema (DME). For this purpose, AH samples obtained during the first anti-VEGF IVT from 31 type two diabetic patients were analyzed. Patients were classified into three groups according to their anti-VEGF response: rapid responders (n = 11), slow responders (n = 11), and non-responders (n = 9). In addition, patients (n = 7) who showed good response to corticosteroids but a delayed or no response to anti-VEGF therapy were analyzed. Levels of 17 different cytokines, chemokines, and growth factors in AH were measured using a multiplex immunoassay. We found higher concentrations of VEGF in rapid responders to anti-VEGF therapy compared to non-responders. In addition, slow responders to anti-VEGF treatment showed higher levels of inflammatory markers than rapid responders, but did not reach statistical significance. Finally, those patients who responded to corticosteroids but not to anti-VEGF therapy showed significantly lower levels of VEGF than patients with rapid response (p = 0.01). In conclusion, "liquid biopsy" of AH could be useful to determine whether the predominant pathogenic event is primarily angiogenic or inflammatory in nature. This approach would allow physicians to select a more rational and cost-effective treatment. Further studies to validate these preliminary results are warranted.

Effect of funding source on reporting bias in studies of intravitreal anti-vascular endothelial growth factor therapy for retinal vein occlusion

PURPOSE

To examine the relationship between industry funding and outcome reporting bias in high-quality studies investigating the use of intravitreal anti-vascular endothelial growth factor (VEGF) agents for patients with macular oedema secondary to branch or central retinal vein occlusion (RVO).

METHODS

This systematic review in PubMed and Ovid MEDLINE examined all randomized clinical trials and meta-analyses published in journals with impact factor of ≥2 that investigated effectiveness of intravitreal anti-VEGF therapy in patients with RVO. The main outcome measure was correspondence between statistical outcome and abstract conclusion wording.

RESULTS

Forty-five studies met inclusion criteria; 38 (84%) showed correspondence between outcome and abstract conclusion without difference between industry-funded and nonindustry-funded publications (p = 0.39) or between publications in journals with impact factor ≥3 versus <3 (p = 0.96).

CONCLUSION

In high-quality studies of intravitreal anti-VEGF therapy for RVO, neither industry funding nor journal impact factor affected the rate of outcome reporting bias.

The impact of anti-vascular endothelial growth factor agents on visual impairment/blindness prevention in patients with diabetic macular edema and on associated patient and caregiver burden in Japan

AIMS

To estimate the impact of anti-vascular endothelial growth factor (VEGF) agents on visual impairment and blindness avoided in patients with diabetic macular edema (DME) and on associated patient and caregiver productivity loss in Japan.

METHODS

This study compared the impact of current care (estimated at 53.8% utilization of anti-VEGF agents using current data) with that of hypothetical care (characterized by a higher utilization of anti-VEGF agents [80.0%], as estimated by an expert panel) of DME patients. A population-based Markov model (two-eye approach) simulated visual acuity (Early Treatment Diabetic Retinopathy Study [ETDRS] letters) transitions over 5 years with DME treatments (intravitreal aflibercept, ranibizumab, and triamcinolone acetonide, and grid/focal laser) in patients with DME. Patient and caregiver productivity loss was determined using the human capital method.

RESULTS

In total, 570,000 DME patients were included in the model over 5 years. Increased utilization of anti-VEGF agents resulted in 6,659 fewer cases of severe visual impairment (SVI; 26-35 ETDRS letters) or blindness (0-25 ETDRS letters) compared with the current care approach (26,023 vs 32,682 cases; 20.38% reduction) over this period. Increased utilization of anti-VEGF agents also contributed to productivity loss savings of ¥12.58 billion (US $115.64 million) (i.e., 17.01%) at the end of year 5. The total overall saving over 5 years was ¥45.83 billion (US $421.27 million) (13.45%).

LIMITATIONS

Few Japanese data were available, and assumptions were made for some inputs. Vision changes dependent on the function of both eyes were not studied. Only intravitreal (not sub-Tenon's) injections of triamcinolone were considered in this model. Direct costs were not considered.

CONCLUSIONS

Increased utilization of anti-VEGF agents can reduce SVI and legal blindness in patients with DME in Japan. This would also be associated with substantial savings in patient and caregiver productivity loss.

Novel Long-acting Pharmacotherapy for Exudative Age Related Macular Degeneration

Exudative age-related macular degeneration (AMD) is a major indication for the administration of intravitreal injections of anti-VEGF agents, which have been established as a very effective pharmacotherapy for this disease. However, treatment with anti-VEGF agents requires several patient visits for monitoring and treatment. Strategies for achieving a longer duration of pharmacological action are currently being developed. These include the development of longer-acting drugs, and of novel technologies to increase the duration of action of administered agents. This manuscript will review the novel drugs and technologies currently being developed for achieving a longer-action pharmacotherapy for exudative AMD.

Intravitreal fluocinolone acetonide implant (ILUVIEN®) for diabetic macular oedema: a literature review

Diabetic macular oedema (DMO) is a common complication of diabetic retinopathy and may lead to severe visual loss. In this review, we describe the pathophysiology of DMO and review current therapeutic options such as macular laser photocoagulation, anti-vascular endothelial growth factor agents, and steroid implants with a focus on the new fluocinolone acetonide implant, ILUVIEN®. The results of the Fluocinolone Acetonide in Diabetic Macular Edema (FAME) studies are also presented together with the results of real-world studies to support the clinical use of ILUVIEN® in achieving efficient resolution of DMO and improving vision and macular anatomy in this challenging group of patients.

Efficacy of intravitreal conbercept injection in the treatment of retinopathy of prematurity

BACKGROUND

To evaluate the safety and efficacy of intravitreal conbercept (IVC) injection in the treatment of retinopathy of prematurity (ROP).

METHODS

Patients with ROP who underwent IVC injection in Zhujiang Hospital from June 2015 to July 2016 were studied retrospectively. The primary outcome was defined as the regression of plus disease. The secondary outcomes were defined as the presence of recurrence, number of injections and the final regression of disease.

RESULTS

A total of 48 eyes of 24 patients with ROP were included. Among them, 9 eyes of 5 patients had zone I ROP, 35 eyes of 18 patients had zone II ROP and 4 eyes of 2 patients had aggressive posterior ROP. The mean gestational age was 28.5±1.6 weeks, the mean birth weight was 1209.6±228.6 g, the mean postmenstrual age of first injection was 34.2±1.9 weeks and the mean follow-up period was 31.0±4.7 weeks. Forty of 48 eyes (83.3%) received IVC only once, and the regression of plus disease occurred at an average of 3.5±1.5 weeks after the first injection of conbercept. For eight recurrent eyes (16.7%), four eyes received a second IVC and the remaining four eyes received laser photocoagulation, and the regression of plus disease occurred in 3 weeks. No lens opacity, vitreous haemorrhage, entophthalmia or retinal detachment was observed during follow-up.

CONCLUSION

IVC injection is an effective treatment for ROP.

Anti-VEGF Agents and the Risk of Arteriothrombotic Events

Blockade of vascular endothelial growth factor (VEGF) signaling, whether via sequestration of free VEGF or via inhibition of the tyrosine kinases activated by VEGF, is associated with decreased nitric oxide (NO) and prostaglandin-I 2 (PG-I 2) production along with vascular endothelial cell death. Systemic administration of drugs that block VEGF signaling (eg, for cancer treatment) is associated with systemic complications such as hypertension and thrombosis. Evidence regarding the risk of systemic serious adverse events after intravitreal injection of anti-VEGF agents in patients with diabetic macular edema or neovascular age-related macular degeneration is inconsistent, in part because of study design limitations (eg, bias of ascertainment through strict enrollment criteria and/or inadequate power to identify the risk of low frequency events). Studies involving patients at high risk of arteriothrombotic events (eg, patients with diabetic macular edema) who have high exposure to intravitreal anti-VEGF therapy (eg, monthly aflibercept or ranibizumab injection) demonstrate an increased risk of all-cause mortality compared with randomized controls. The pharmacokinetics of anti-VEGF drug clearance from the systemic circulation and the documented sustained reduction in free plasma VEGF levels after intravitreal aflibercept and bevacizumab injection are consistent with these findings. Although the frequency of systemic serious adverse events after intravitreal anti-VEGF therapy is low, some patients may be at higher risk (eg, those with recent stroke or multiple strokes), and physicians may wish to take special measures with these patients to minimize the risk of systemic complications.

Risk of venous and arterial thromboembolic events associated with anti-VEGF agents in advanced non-small-cell lung cancer: a meta-analysis and systematic review

Aims

To assess the incidence and risk of arterial and venous thromboembolic events (ATEs and VTEs) associated with antivascular endothelial growth factor (VEGF) agents, including VEGF receptor-tyrosine kinase inhibitors and VEGF monoclonal antibodies, in advanced non-small-cell lung cancer (NSCLC) patients.

Methods

We performed a broad search of PubMed for relevant trials. Prospective randomized trials evaluating therapy with or without anti-VEGF agents in patients with advanced NSCLC were included for analysis. Data on VTEs and ATEs were extracted. The overall incidence, Peto odds ratio (Peto OR), and 95% confidence intervals (CIs) were pooled according to the heterogeneity of included trials.

Results

A total of 13,436 patients from 23 trials were included for analysis. Our results showed that anti-VEGF agents significantly increased the risk of developing high-grade ATEs (Peto OR: 1.44, 95% CI: 1.00–2.07, P=0.048), but not for all-grade ATEs (Peto OR: 0.94, 95% CI: 0.56–1.59, P=0.82) compared with controls. Additionally, no increased risk of all-grade and high-grade VTEs (Peto OR: 0.94, 95% CI: 0.67–1.31, P=0.71 and Peto OR: 0.95, 95% CI: 0.73–1.22, P=0.67, respectively) was observed in advanced NSCLC patients receiving anti-VEGF agents.

Conclusion

The use of anti-VEGF agents in advanced NSCLC patients significantly increased the risk of high-grade ATEs, but not for VTEs. Clinicians should be aware of the risk of severe ATEs with administration of these drugs in advanced NSCLC patients.

Immediate intraocular pressure rise after intravitreal injection of ranibizumab and two doses of triamcinolone acetonide

AIM

To evaluate prospectively immediate intraocular pressure (IOP) changes after the intravitreal injection of ranibizumab, 2 and 4mg triamcinolone acetonide.

METHODS

Patients who underwent intravitreal injection of 0.1mL (4mg) triamcinolone acetonide (TA, Group T4), 0.05mL (2mg) TA (Group T2) and 0.05mL (0.5mg) ranibizumab (Group R) comprised the study population. Overall, 229 eyes of 205 patients were injected. Fifty-four eyes (23.6%) were in Group T4, 69 eyes (30.1%) in Group T2 and 106 eyes (46.3%) in Group R. If IOP was less than 26mmHg immediately after the injection no further measurement was performed. If IOP was ≥26mmHg, IOP was remeasured till the reading was below 26mmHg at 5, 15 and 30 minutes.

RESULTS

Immediately after the injection, the IOP of 28 eyes (51.9%) in Group T4, 22 eyes (31.9%) in Group T2 and 51 eyes (48.1%) in Group R were over 25mmHg. At 30 minutes, IOP of one eye (1.9%) in group T4, two eyes (2.9%) in group T2 and two eyes (1.9 %) in Group R were over 25mmHg. Immediate post-injection IOP was significantly higher in Group T4 and Group R when compared to Group T2 (P<0.001 and P<0.001, respectively). IOP was significantly higher in eyes without vitreous reflux when compared to those with vitreous reflux in all groups (P<0.001).

CONCLUSION

IOP may remarkably increase immediately after the intravitreal injection of 2 or 4mg triamcinolone acetonide, and 0.5mg ranibizumab. Absence of vitreous reflux is the most important predicting factor for immediate IOP rise after the injection.