Publications by authors named "Christina Wyatt"

Objectives: To determine baseline prevalence of proteinuria and albuminuria among participants from the Randomized Trial to Prevent Vascular Events in HIV (REPRIEVE) and evaluate associated risk factors.

Design: Cross sectional analysis of a baseline sample of participants from the REPRIEVE Trial.

Methods: REPRIEVE is an international primary cardiovascular prevention randomized controlled trial (RCT) of pitavastatin calcium vs.

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Article Synopsis
  • - The study aimed to assess the effectiveness of a new point-of-care urine tenofovir (POC TFV) test in improving the accuracy of self-reported adherence to preexposure prophylaxis (PrEP) among sexually active HIV-negative women in Uganda.
  • - Over 24 months, participants who took the test reported higher rates of low PrEP adherence and condomless sex during visits with the test compared to those without it, indicating that the test may encourage more honest self-reporting.
  • - The accuracy of self-reported PrEP adherence significantly increased when the POC TFV test was utilized, suggesting that the test could foster better communication between patients and healthcare providers.
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People with human immunodeficiency virus (HIV) are at risk for chronic kidney disease (CKD) due to HIV and antiretroviral therapy (ART) nephrotoxicity. Immediate ART initiation reduces mortality and is now the standard of care, but the long-term impact of prolonged ART exposure on CKD is unknown. To evaluate this, the Strategic Timing of Antiretroviral Treatment (START) trial randomized 4,684 ART-naïve adults with CD4 cell count under 500 cells/mm to immediate versus deferred ART.

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Article Synopsis
  • Oral PrEP is recommended for at-risk pregnant cisgender women, but it may negatively impact bone health, which is already affected by pregnancy.
  • The study followed 499 young women using PrEP and measured bone mineral density (BMD) over 24 months, noting that 67% of pregnant women continued using PrEP.
  • Results showed that women on PrEP during pregnancy had significantly lower BMD compared to non-pregnant women or pregnant women who didn't use PrEP, and adherence to PrEP decreased during pregnancy.
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Background: CKD of unknown etiology (CKDu) disproportionately affects young people in Central America who lack traditional CKD risk factors (diabetes and hypertension) and has instead been variably linked to heat stress, occupational and environmental exposures, nephrotoxic medications, and/or genetic susceptibility. This study aimed to estimate the prevalence of CKD and identify risk factors for traditional CKD and CKDu in Nicaragua.

Methods: Surveys and assessment for CKD markers in urine and serum were performed in 15-59 year olds in households of the León municipality of Nicaragua.

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Article Synopsis
  • A study investigated whether people with HIV (PWH), both virally suppressed and not suppressed, face a higher risk of acute kidney injury (AKI) compared to those without HIV.
  • The research included 173,884 hospitalized patients, finding that PWH are at increased risk of AKI, regardless of their viral suppression status.
  • The study suggests that HIV is an independent risk factor for AKI and calls for further research to understand how HIV contributes to this risk and ways to prevent AKI in PWH.
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Background & Aims: The prevalence and aetiology of liver fibrosis vary over time and impact racial/ethnic groups unevenly. This study measured time trends and identified factors associated with advanced liver fibrosis in the United States.

Methods: Standardised methods were used to analyse data on 47,422 participants (≥20 years old) in the National Health and Nutrition Examination Survey (1999-2018).

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Depression is a common cause of morbidity globally and can impact adherence to medications, posing challenges to medication-based HIV prevention. The objectives of this work are to describe the frequency of depression symptoms in a cohort of 499 young women in Kampala, Uganda and to determine the association of depression symptoms with use of HIV pre-exposure prophylaxis (PrEP). Mild or greater depression, assessed by the patient health questionnaire (PHQ-9), was experienced by 34% of participants at enrollment.

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Chronic kidney disease (CKD) of uncertain etiology (CKDu) is a global health concern affecting tropical farming communities. CKDu is not associated with typical risk factors (e.g.

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Objective: Medical intensive care unit (MICU) admissions have been declining in people with HIV infection (PWH), but frequency of outpatient polypharmacy (prescription of ≥5 chronic medications) has increased. Among those hospitalized, we examined whether outpatient polypharmacy is associated with subsequent 1-year MICU admission or 10-year all-cause mortality, and if the association varies by HIV status.

Design: Retrospective cohort study.

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Unlabelled: Few studies have characterized bone mineral density (BMD) among health young African women. In our study of 496 Ugandan women age ≤25 years, we found that women had healthy BMD that were lower on average than the standard reference ranges. Reference ranges available for BMD measurements need greater precision.

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Background: Women represent a meaningful proportion of new HIV diagnoses, with Black women comprising 58% of new diagnoses among women. As HIV infection also increases risk of chronic kidney disease (CKD), understanding CKD risk among women with HIV (WWH), particularly Black women, is critical.

Methods: In this longitudinal cohort study of people with HIV (PWH) enrolled in CFAR Network of Integrated Clinical Systems (CNICS), a multicentre study comprised of eight academic medical centres across the United States from Jan 01, 1996 and Nov 01, 2019, adult PWH were excluded if they had ≤2 serum creatinine measurements, developed CKD prior to enrollment, or identified as intersex or transgendered, leaving a final cohort of 33,998 PWH.

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Objectives: We evaluated the association of lupus nephritis (LN) and adverse pregnancy outcomes in prospective cohorts of pregnant women with SLE (systemic lupus erythematosus).

Methods: We conducted a patient-level pooled analysis of data from three cohorts of pregnant women with SLE. Pooled logistic regression models were used to evaluate the association of LN and adverse pregnancy outcomes.

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Four decades after the first cases of HIV were reported, kidney disease remains an important comorbidity in people with HIV (PWH). Both HIV-associated nephropathy and immune complex kidney disease were recognized as complications of HIV infection in the early years before treatment was available. Although the introduction of effective antiretroviral therapy in the late 1990s resulted in dramatic improvements in survival and health in PWH, several commonly used antiretroviral agents have been associated with kidney injury.

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Background: Microalbuminuria is an independent risk factor for cardiovascular and kidney disease and a predictor of end organ damage, both in the general population and in persons with HIV (PWH). Microalbuminuria is also an important risk factor for mortality in PWH treated with antiretroviral therapy (ART). In the ongoing Renal Risk Reduction (R3) study in Nigeria, we identified a high prevalence of microalbuminuria confirmed by two measurements 4-8 weeks apart in ART-experienced, virologically suppressed PWH.

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Hypertension (HTN) is a common comorbidity among people with HIV and associated with an increased risk for atherosclerotic cardiovascular disease and chronic kidney disease. The relationship of antiretroviral therapy (ART) initiation to incident HTN remains a clinical question. We determined HTN incidence at 48 weeks of follow-up among ART-naive participants without HTN and not taking antihypertensive medications at ART initiation through randomized clinical trials through the AIDS Clinical Trial Group between 1999 and 2011.

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BACKGROUND: Enteric hyperoxaluria is caused by increased intestinal oxalate absorption and can lead to kidney stones, chronic kidney disease, and kidney failure. Reloxaliase is an orally administered recombinant enzyme that degrades oxalate along the gastrointestinal tract, thereby preventing its absorption. METHODS: We randomly assigned participants with enteric hyperoxaluria to reloxaliase or placebo, three to five times per day with food for 4 weeks.

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Proteinuria is common in the setting of HIV infection, and may reflect comorbid kidney disease, treatment-related nephrotoxicity, and HIV-related glomerular diseases. The mechanisms of podocyte and tubulointerstial injury in HIV-associated nephropathy (HIVAN) have been the subject of intense investigation over the past four decades. The pathologic contributions of viral gene expression, dysregulated innate immune signaling, and ancestry-driven genetic risk modifiers have been explored in sophisticated cellular and whole animal models of disease.

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Article Synopsis
  • - Worldwide, around 38 million people are living with HIV, with a particular risk of developing HIV-associated nephropathy, especially among those of African descent with advanced HIV stages.
  • - Challenges like higher HIV prevalence and limited healthcare access in resource-poor areas contribute to higher rates of kidney disease among disadvantaged populations.
  • - Current guidelines emphasize lifelong antiretroviral therapy to prevent kidney disease, and for those who progress to end-stage kidney disease, treatment options include dialysis and transplants, including from HIV-positive donors.
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Rationale & Objective: Staphylococcus aureus (Saureus) bacteremia (SAB) is associated with morbidity and mortality in patients receiving maintenance hemodialysis (HD). We evaluated changes in clinical and bacterial characteristics, and their associations with clinical outcomes with SAB in this population over a 21-year period.

Study Design: Prospective cohort study.

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HIV-positive adults are at risk for various kidney diseases, and apolipoprotein 1 (APOL1) high-risk genotypes increase this risk. This study aimed to determine the prevalence and ethnic distribution of APOL1 risk genotypes among a cohort of HIV-positive Nigerian adults and explore the relationship between APOL1 risk variant status with albuminuria and estimated glomerular filtration rate (eGFR). We conducted a cross-sectional study among 2 458 persons living with HIV who attended an HIV clinic in northern Nigeria and had received antiretroviral therapy for a minimum of six months.

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We previously reported a higher incidence of non-albumin proteinuria and a small but significant decline in estimated glomerular filtration rate (eGFR) among HIV-negative adults randomized to emtricitabine/tenofovir disoproxil fumarate preexposure prophylaxis (FTC/TDF PrEP) versus placebo. In a nested case--control study among participants randomized to FTC/TDF PrEP, established kidney injury biomarkers measured at 12 months were not significantly different between participants who subsequently experienced one of these kidney endpoints and randomly selected controls who did not.

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