Publications by authors named "Praveen Patel"

Oestradiol and progesterone levels are higher in menstruating women than men of the same age, and their receptors are present in their neurosensory retina and retinal pigment epithelium. However, the impact of this hormonal environment on retinal physiology in women remains unclear. Using self-reported menstrual cycle phases as a surrogate for fluctuating hormonal levels, we investigated associations with retinovascular indices on colour fundus photograph and retinal thickness in optical coherence tomography across regularly menstruating women in the UK Biobank.

View Article and Find Full Text PDF
Article Synopsis
  • * By analyzing data from the Million Veteran Program and other cohorts, the study identifies 63 genetic loci linked to AMD, including 30 that were previously unknown, highlighting significant differences in risk among various ancestries.
  • * The findings reveal that certain genetic risk factors, like those found in the CFH locus, have varying effects based on ancestry, suggesting that targeted therapies could be developed by considering these genetic differences.
View Article and Find Full Text PDF
Article Synopsis
  • - Application of AI was used to analyze macular OCT scans in patients with neovascular AMD, focusing on changes in anatomical and pathological features during anti-VEGF treatment.
  • - A total of 2115 eyes from 1801 patients were retrospectively studied, with significant volume reductions observed in exudative features like intraretinal and subretinal fluid over 12 months.
  • - Results showed that while exudative features responded quickly to treatment, other anatomical structures such as the neurosensory retina and retinal pigment epithelium exhibited gradual volume reductions that were less pronounced.
View Article and Find Full Text PDF
Article Synopsis
  • - This study aimed to assess the risk of acute cardiovascular events (CVE) in patients with paracentral acute middle maculopathy (PAMM) by evaluating a cohort of 43 individuals at Moorfields Eye Hospital over several years.
  • - Researchers divided participants into younger (under 50) and older (50 and above) age groups, while considering those with retinal vascular diseases (RVD) versus those with isolated PAMM (iPAMM).
  • - Results showed that older patients with iPAMM faced a significantly higher risk of CVE compared to those with PAMM + RVD, especially with an early peak in risk for iPAMM; younger patients did not experience adverse cardiovascular events.
View Article and Find Full Text PDF

Purpose: To report 1-year anatomic and functional real-world outcomes of patients with treatment-intensive neovascular age-related macular degeneration (nAMD) switched to faricimab.

Design: Retrospective multicenter cohort study.

Subjects: Consecutive nAMD patients on 4-weekly treatment interval with either ranibizumab or aflibercept 2 mg in the last 3 visits within a treat-and-extend protocol (high treatment burden) before switch to faricimab at Moorfields Eye Hospital between September 5, 2022 and December 5, 2022.

View Article and Find Full Text PDF
Article Synopsis
  • The study focuses on diagnosing neovascular age-related macular degeneration (nAMD) using various imaging techniques, assessing their accuracy in clinical practice.
  • It involves 1,067 participants with nAMD symptoms, comparing non-invasive methods like Optical Coherence Tomography (OCT) and Optical Coherence Tomography Angiography (OCTA) against invasive methods like Fundus Fluorescein Angiography (FFA) and Indocyanine-Green Angiography (ICGA).
  • The research aims to determine which combination of imaging techniques is more effective in detecting nAMD, with ethics approval already secured for the study.
View Article and Find Full Text PDF

Objectives: To validate and update the 2013 James Lind Alliance (JLA) Sight Loss and Vision Priority Setting Partnership (PSP)'s research priorities for Ophthalmology, as part of the UK Clinical Eye Research Strategy.

Methods: Twelve ophthalmology research themes were identified from the JLA report. They were allocated to five Clinical Study Groups of diverse stakeholders who reviewed the top 10 research priorities for each theme.

View Article and Find Full Text PDF

Importance: Despite widespread availability and consensus on its advantages for detailed imaging of geographic atrophy (GA), spectral-domain optical coherence tomography (SD-OCT) might benefit from automated quantitative OCT analyses in GA diagnosis, monitoring, and reporting of its landmark clinical trials.

Objective: To analyze the association between pegcetacoplan and consensus GA SD-OCT end points.

Design, Setting, And Participants: This was a post hoc analysis of 11 614 SD-OCT volumes from 936 of the 1258 participants in 2 parallel phase 3 studies, the Study to Compare the Efficacy and Safety of Intravitreal APL-2 Therapy With Sham Injections in Patients With Geographic Atrophy (GA) Secondary to Age-Related Macular Degeneration (OAKS) and Study to Compare the Efficacy and Safety of Intravitreal APL-2 Therapy With Sham Injections in Patients With Geographic Atrophy (GA) Secondary to Age-Related Macular Degeneration (DERBY).

View Article and Find Full Text PDF

Background And Purpose: The eye is a well-established model of brain structure and function, yet region-specific structural correlations between the retina and the brain remain underexplored. Therefore, we aim to explore and describe the relationships between the retinal layer thicknesses and brain magnetic resonance image (MRI)-derived phenotypes in UK Biobank.

Methods: Participants with both quality-controlled optical coherence tomography (OCT) and brain MRI were included in this study.

View Article and Find Full Text PDF

Aim: Telemedicine has emerged as a potential solution to enhance postoperative follow-up care after dental implant surgery, offering the convenience of remote monitoring and reduced need for in-person visits.

Materials And Methods: Participants were randomly assigned to either the telemedicine group (n = 15) or the in-person group (n = 15). In the telemedicine group, patients received remote follow-up care through virtual consultations, during which they could communicate their concerns and share images of the surgical site.

View Article and Find Full Text PDF

Purpose: To quantify relevant fundus autofluorescence (FAF) image features cross-sectionally and longitudinally in a large cohort of inherited retinal diseases (IRDs) patients.

Design: Retrospective study of imaging data (55-degree blue-FAF on Heidelberg Spectralis) from patients.

Participants: Patients with a clinical and molecularly confirmed diagnosis of IRD who have undergone FAF 55-degree imaging at Moorfields Eye Hospital (MEH) and the Royal Liverpool Hospital (RLH) between 2004 and 2019.

View Article and Find Full Text PDF

Purpose: Periodontitis, a ubiquitous severe gum disease affecting the teeth and surrounding alveolar bone, can heighten systemic inflammation. We investigated the association between very severe periodontitis and early biomarkers of age-related macular degeneration (AMD), in individuals with no eye disease.

Design: Cross-sectional analysis of the prospective community-based cohort United Kingdom (UK) Biobank.

View Article and Find Full Text PDF

A category of cytoplasmic transcription factors called STATs mediates intracellular signaling, which is frequently generated at receptors on cell surfaces and subsequently sent to the nucleus. STAT3 is a member of a responsible for a variety of human tumor forms, including lymphomas, hematological malignancies, leukemias, multiple myeloma and several solid tumor types. Numerous investigations have demonstrated constitutive STAT3 activation lead to cancer development such as breast, head and neck, lung, colorectal, ovarian, gastric, hepatocellular, and prostate cancers.

View Article and Find Full Text PDF

Introduction: There is a high and ever-increasing global prevalence of diabetic retinopathy (DR) and invasive imaging techniques are often required to confirm the presence of proliferative disease. The aim of this study was to explore the images of a rapid and non-invasive technique, widefield optical coherence tomography angiography (OCT-A), to study differences between patients with severe non-proliferative and proliferative DR (PDR).

Methods: We conducted an observational longitudinal study from November 2022 to March 2023.

View Article and Find Full Text PDF

Purpose: To assess different microperimetry (MP) macular sensitivity outcome measures capturing functional deterioration in eyes with geographic atrophy (GA) secondary to age-related macular degeneration (AMD).

Design: Patients were included from 2 identically designed, phase III, double-masked, randomized controlled clinical trials, Chroma (NCT02247479) and Spectri (NCT02247531).

Participants: Patients enrolled were aged ≥ 50 years with bilateral GA and no evidence of previous or active neovascular AMD.

View Article and Find Full Text PDF

Introduction: To evaluate the effect pegcetacoplan, a C3 and C3b inhibitor, on the rate of progression of geographic atrophy (GA) as assessed by spectral domain optical coherence tomography (SD-OCT) using a split-person study design and deep-learning quantification.

Methods: A post hoc analysis of phase 2 FILLY trial data comparing study (treated monthly, treated every other month and sham-treated) and fellow (untreated) eyes in a split-person study design was performed. This analysis included 288 eyes from 144 patients with bilateral GA from the FILLY phase 2 trial (Clinical Trials identifier: NCT02503332).

View Article and Find Full Text PDF

Learning Objective: Hemodynamic monitoring during in-hospital transport of intubated patients is vital; however, no prospective randomized trials have evaluated the hemodynamic consequences of hand versus machine ventilation during transport among pediatric patients' post-cardiac surgery. The authors hypothesized that manual ventilation after pediatric cardiac surgery would alter hemodynamic and arterial blood gas (ABG) parameters during transport compared to mechanical ventilation.

Design: A prospective randomized trial.

View Article and Find Full Text PDF

Importance: Calcium channel blocker (CCB) use has been associated with an increased risk of glaucoma in exploratory studies.

Objective: To examine the association of systemic CCB use with glaucoma and related traits among UK Biobank participants.

Design, Setting, And Participants: This population-based cross-sectional study included UK Biobank participants with complete data (2006-2010) for analysis of glaucoma status, intraocular pressure (IOP), and optical coherence tomography (OCT)-derived inner retinal layer thicknesses.

View Article and Find Full Text PDF

Background And Objectives: Cadaveric studies have shown disease-related neurodegeneration and other morphological abnormalities in the retina of individuals with Parkinson disease (PD); however, it remains unclear whether this can be reliably detected with in vivo imaging. We investigated inner retinal anatomy, measured using optical coherence tomography (OCT), in prevalent PD and subsequently assessed the association of these markers with the development of PD using a prospective research cohort.

Methods: This cross-sectional analysis used data from 2 studies.

View Article and Find Full Text PDF

Introduction: Our main objective was to investigate whether retinal neurodegeneration, estimated from lower thickness of inner retinal layers, was associated with incident all-cause dementia and Alzheimer's disease (AD).

Methods: We performed an individual participant data meta-analysis using unpublished data from four prospective cohort studies with a total of 69,955 participants (n = 1087 cases of incident all-cause dementia; n = 520 cases incident AD; follow-up time median [interquartile range] 11.3 [8.

View Article and Find Full Text PDF

Introduction: Clinical trials in neovascular age-related macular degeneration (nAMD) using anti-vascular endothelial growth factor (ant-VEGF) injections use disease activity (DA) criteria to shorten, maintain or increase the interval between injections. Differences in these DA criteria may contribute to differences in the proportions of patients with macular fluid at key time points or achieving extended dosing intervals in these trials. We identified, collated and evaluated DA criteria from pivotal anti-VEGF nAMD trials to understand how differences impact on these studies and real-world visual acuity and extending dosing outcomes.

View Article and Find Full Text PDF

Purpose: The retina provides biomarkers of neuronal and vascular health that offer promising insights into cognitive ageing, mild cognitive impairment and dementia. This article described the rationale and methodology of eye and vision assessments with the aim of supporting the study of dementia in the UK Biobank Repeat Imaging study.

Participants: UK Biobank is a large-scale, multicentre, prospective cohort containing in-depth genetic, lifestyle, environmental and health information from half a million participants aged 40-69 enrolled in 2006-2010 across the UK.

View Article and Find Full Text PDF

Purpose: To determine whether the ABCA4 retinopathy-associated variant p.Asn1868Ile (c.5603A>T) is associated with retinal structure or subclinical disease among the general population.

View Article and Find Full Text PDF