Publications by authors named "Jonathan Uy"

Introduction: Prior studies have demonstrated guselkumab improves disease activity and patient-reported outcomes (PROs) among patients with moderate-to-severe plaque psoriasis. However, the real-world effectiveness of guselkumab across different subgroups [e.g.

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Introduction: Guselkumab, an anti-interleukin-23 biologic therapy, has been shown to significantly reduce disease activity and improve patient-reported outcome measures (PROMs) among patients with moderate-to-severe plaque psoriasis in clinical trials. However, characterization of the real-world effectiveness of guselkumab among patients living in the USA and Canada is warranted.

Methods: Patients who participated in the CorEvitas Psoriasis Registry between 18 July 2017 and 10 March 2020 were included if they met the following criteria: Investigator's Global Assessment (IGA) score ≥ 3 and body surface area (BSA) ≥ 10% (moderate-to-severe psoriasis), initiated guselkumab at a registry (index) visit, and had a registry follow-up visit after 9-12 months of persistent guselkumab therapy.

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Introduction: In clinical trials, treatment with the interleukin-23 inhibitor guselkumab was associated with significantly improved disease severity and patient-reported outcome measures (PROMs) among patients with moderate-to-severe plaque psoriasis. However, limited information is available regarding the real-world effectiveness of guselkumab among patients with psoriasis of mild, moderate, and severe Investigator's Global Assessment (IGA) severities living in the USA and Canada.

Methods: Patients participating in the CorEvitas Psoriasis Registry between 18 July 2017 and 10 July 2019 who met the following criteria were included: IGA ≥ 2 (mild or greater disease severity), initiated guselkumab at a registry (index) visit, and had a registry follow-up visit after persistent guselkumab treatment for 9 to 12 months.

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Introduction: Guselkumab is approved for the treatment of both moderate-to-severe plaque psoriasis and active psoriatic arthritis (PsA) in the USA. However, little is known about patients initiating guselkumab in a real-world setting. The objective of this study was to describe baseline characteristics among patients with plaque psoriasis who initiated guselkumab at or after enrollment in CorEvitas' Psoriasis Registry.

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Article Synopsis
  • The Psoriasis Longitudinal Assessment and Registry (PSOLAR) was established in 2007 as the first registry specifically for psoriasis patients, involving over 12,000 participants to assess long-term safety of biologic treatments.
  • This study aimed to highlight the methodological limitations in safety evaluations within registries, focusing on a potential risk of major adverse cardiovascular events (MACE) associated with the drug ustekinumab.
  • After refining analysis methods and addressing issues like patient imbalances and data limitations, the findings concluded no significant increase in MACE risk due to ustekinumab, emphasizing the importance of improving analytical techniques in observational studies.
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Background: There are limited data on outcomes for patients with peripheral artery disease undergoing endovascular revascularization by multi-disciplinary teams in a community hospital setting.

Methods: From January 2015 through December 2015, we assembled a multi-disciplinary program comprised of cardiologists, surgeons, radiologists, nurses, and administrative staff for managing patients with peripheral artery disease undergoing endovascular revascularization. Demographic, procedural, and outcomes data were collected with use of a template from the Society for Vascular Surgery Vascular Quality Initiative database.

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Introduction: The Biosimilars Forum conducted a survey through an independent organization from November 20, 2015 to January 4, 2016 in order to assess current levels of awareness, knowledge, and perceptions of biosimilars among US specialty physicians who already prescribe biologics. The survey was intended to provide a baseline level of knowledge about biosimilars and will be repeated in 2-3 years in order to monitor trends over time.

Methods: A 19-question survey was created by the Biosimilars Forum and was administered by an independent third party.

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Voriconazole, a broad-spectrum triazole antifungal agent, is metabolized by cytochrome P450 (CYP) 2C19 and, to a lesser extent, by CYP3A. Genetic polymorphism of CYP2C19 not only plays a prominent role in its disposition but may also influence potential drug interactions with CYP450 modulators such as ritonavir. This study assessed 2-way drug interactions of voriconazole added on to ritonavir-boosted atazanavir in both CYP2C19 extensive-metabolizer (EM) and poor-metabolizer (PM) healthy subjects.

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Purpose: We examined the therapeutic effects of avanafil 15 minutes after dosing in men with mild to severe erectile dysfunction.

Materials And Methods: This randomized, double-blind, placebo controlled, 12-week study (4-week run-in and 8-week treatment) randomized 145 men to placebo, 147 to avanafil 100 mg and 148 to avanafil 200 mg on demand. The primary efficacy variable was the per subject proportion of sexual attempts during the treatment period in which subjects achieved erection sufficient for vaginal penetration within approximately 15 minutes after dosing as measured by a stopwatch.

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Background: The impact of boosted protease inhibitor therapy on inflammatory and cardiovascular biomarker levels in treatment-naive HIV-infected patients remains unclear and may differ between agents. Unconjugated bilirubin elevation, which favourably affects vascular biomarkers and cardiovascular disease risk in Gilbert's syndrome, occurs with atazanavir.

Methods: CASTLE was a 96-week study comparing efficacy and safety in treatment-naive HIV-1-infected patients randomized to atazanavir/ritonavir (ATV/r) versus lopinavir/ritonavir (LPV/r), each in combination with tenofovir disoproxil fumarate/emtricitabine.

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Objectives: This is the first study to compare the incidence and health care costs of medically attended adverse effects in atazanavir- and darunavir-based antiretroviral therapy (ART) among U.S. Medicaid patients receiving routine HIV care.

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Data on the effectiveness of second-line combination antiretroviral therapy (cART) are limited. We evaluated virologic outcomes of second cART in a multicenter cohort collaboration. The study population initiated first and second modern cART between 1996 and 2010.

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Background: Antiretroviral regimens with simplified dosing and better safety are needed to maximize the efficiency of antiretroviral delivery in resource-limited settings. We investigated the efficacy and safety of antiretroviral regimens with once-daily compared to twice-daily dosing in diverse areas of the world.

Methods And Findings: 1,571 HIV-1-infected persons (47% women) from nine countries in four continents were assigned with equal probability to open-label antiretroviral therapy with efavirenz plus lamivudine-zidovudine (EFV+3TC-ZDV), atazanavir plus didanosine-EC plus emtricitabine (ATV+DDI+FTC), or efavirenz plus emtricitabine-tenofovir-disoproxil fumarate (DF) (EFV+FTC-TDF).

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CASTLE was a randomized 96-week study that demonstrated that atazanavir/ritonavir (ATV/r) was noninferior to lopinavir/ritonavir (LPV/r) in treatment-naïve HIV-infected patients. Analyses were carried out among patients who received ATV/r in the CASTLE study to better understand the clinical significance of unconjugated hyperbilirubinemia associated with administration of boosted ATV. Hyperbilirubinemia was defined as total bilirubin (conjugated and unconjugated) elevation greater than 2.

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Background: It is unknown whether HIV-positive patients experiencing virologic failure (VF) on boosted-PI (PI/r) regimens without drug resistant mutations (DRM) by standard genotyping harbor low-level PI resistant variants. CASTLE compared the efficacy of atazanavir/ritonavir (ATV/r) with lopinavir/ritonavir (LPV/r), each in combination with TVD in ARV-naïve subjects.

Objective: To determine if VF on an initial PI/r-based regimen possess low-level resistant variants that may affect a subsequent PI-containing regimen.

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Current guidelines for HIV therapy recommend initiating treatment at a CD4 cell count of 500 cells/mm(3). However, a large proportion of patients with HIV infection begin antiretroviral treatment at a more advanced stage. In the CASTLE study, patients with the most advanced HIV disease (CD4 cell count <50 cells/mm(3)) showed that 78% (45/58) vs.

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Objective: To evaluate lifetime cost effectiveness of atazanavir-ritonavir (ATV + r) versus lopinavir-ritonavir (LPV/r), both with tenofovir-emtricitabine, in US HIV-infected patients initiating first-line antiretroviral therapy.

Methods: A Markov microsimulation model was developed to calculate quality-adjusted life-years (QALYs) based on CD4 and HIV RNA levels, coronary heart disease (CHD), AIDS, opportunistic infections (OIs), diarrhea, and hyperbilirubinemia. A million-member cohort of HIV-1-infected, treatment-naïve adults progressed at 3-month intervals through eight health states.

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Objectives: To examine whether the overall results of the CASTLE study pertain to both genders, we analysed the efficacy and safety of atazanavir/ritonavir and lopinavir/ritonavir in 277 female and 606 male patients in the open-label, multinational trial over 96 weeks. The trial is registered with ClinicalTrials.gov, number NCT00272779.

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Background: CASTLE compared the efficacy of atazanavir/ritonavir with lopinavir/ritonavir, each in combination with tenofovir-emtricitabine in ARV-naïve subjects from 5 continents.

Objectives: Determine the baseline rate and clinical significance of TDR mutations using ultra-deep sequencing (UDS) in ARV-naïve subjects in CASTLE.

Methods: A case control study was performed on baseline samples for all 53 subjects with virologic failures (VF) at Week 48 and 95 subjects with virologic successes (VS) randomly selected and matched by CD4 count and viral load.

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Background: There are limited data on the risk of developing HIV drug resistance based on the CD4 cell count at which highly active antiretroviral therapy (HAART) is initiated.

Methods: We examined data from participants in the HIV Outpatient Study who initiated antiretroviral therapy with HAART in 1999 or later (when genotypic resistance testing became more commonly used in clinical practice and in the HIV Outpatient Study), achieved virologic suppression, and subsequently experienced virologic failure and received a genotypic assay for antiretroviral resistance mutations. We assessed the frequency of resistance mutations at virologic failure and the differences in the frequencies of mutations by the CD4 stratum at which HAART was initiated using the Cochran-Armitage exact test.

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Background: Treatment-naïve participants were randomized to three antiretroviral strategies (all with nucleoside reverse transcriptase inhibitor [NRTI] background): protease inhibitor (PI), non-nucleoside reverse transcriptase inhibitor (NNRTI), or PI+NNRTI. The strategies were compared for drug resistance at first virologic failure (VF; HIV RNA >1000 copies/mL). The impact of resistance on AIDS or death was determined.

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Background: Clinical utilization of genotype resistance testing is evolving. We examined the extent to which HIV care providers requesting genotype resistance tests used the information appropriately and the impact of inappropriate utilization.

Methods: Data from a prospective cohort of HIV-infected patients (the HIV Outpatient Study) were used in the analysis.

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Background: The prevalence of drug resistance among persons with newly acquired human immunodeficiency virus (HIV) infection is well documented. However, it is unclear to what extent these mutations persist in chronically infected, treatment-naive patients.

Methods: Prevalence of and factors associated with genotypic drug resistance were analyzed retrospectively in a subset of 491 chronically HIV-infected, antiretroviral-naive patients enrolled at 25 cities in the Terry Beirn Community Programs for Clinical Research on Acquired Immune Deficiency Syndrome (AIDS) Flexible Initial Retrovirus Suppressive Therapies trial during 1999-2001.

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