Publications by authors named "Claire Townsend"

Article Synopsis
  • Cystic Fibrosis affects the CFTR gene, leading to mucus accumulation and lung issues; Ivacaftor is a drug that helps improve CFTR function and has potential for treating mucus problems in COPD.
  • A study tested new small molecule potentiators on CFTR activity using various cell cultures and models, specifically focusing on the effects of cigarette smoke.
  • Findings indicated that SK-POT1 improved CFTR activity in airway cells exposed to cigarette smoke, suggesting it could be a promising candidate for treating mucostasis in airway diseases.
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Background: Cystic Fibrosis causing mutations in the gene , reduce the activity of the CFTR channel protein, and leads to mucus aggregation, airway obstruction and poor lung function. A role for CFTR in the pathogenesis of other muco-obstructive airway diseases such as Chronic Obstructive Pulmonary Disease (COPD) has been well established. The CFTR modulatory compound, Ivacaftor (VX-770), potentiates channel activity of CFTR and certain CF-causing mutations and has been shown to ameliorate mucus obstruction and improve lung function in people harbouring these CF-causing mutations.

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Introduction: Tenofovir alafenamide (TAF) is approved for paediatric use in fixed-dose combination tablets, but efficacy and safety data in children are limited. We conducted a systematic review on the efficacy/effectiveness and safety of TAF in infants, children and adolescents living with HIV.

Methods: We searched MEDLINE, Embase, the Cochrane Library, clinical trial registries, reference lists and relevant conferences to identify literature published January 2009-March 2021.

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Introduction: Globally about 1.7 million children were living with HIV in 2020. Two integrase strand transfer inhibitors, dolutegravir and raltegravir, are increasingly used in children.

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Article Synopsis
  • Abacavir, a nucleoside reverse transcriptase inhibitor, is evaluated for its safety and efficacy in treating HIV in children and adolescents to guide WHO's 2021 pediatric ART recommendations.
  • A systematic review of studies published from 2009 to 2022 involved various age groups, assessing both safety (e.g., adverse events) and efficacy (e.g., viral load and CD4 counts) of abacavir-based therapies.
  • Out of 1777 records, only 33 studies met the eligibility criteria for inclusion, indicating a rigorous selection process for relevant data.
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Article Synopsis
  • The WHO Paediatric Drug Optimization for HIV (PADO-HIV) group aims to enhance HIV treatment and prevention for children by identifying and prioritizing safe and effective drug formulations every 2-3 years.
  • PADO-HIV 5, which met from Sept 27 to Oct 15, 2021, assessed various HIV treatment options, including new drug classes and delivery methods, focusing specifically on the needs of neonates and innovative technologies.
  • The group produced a list of research priorities and questions to guide funders and developers, aiming to improve access to the best HIV medications for children in low- and middle-income countries.
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Article Synopsis
  • Atazanavir/ritonavir is recommended as a second-line HIV treatment for children over 3 months old, and a systematic review was conducted to assess its safety and effectiveness in this population.
  • Researchers analyzed data from 1,085 records, ultimately including five studies with 975 participants, finding a 19% treatment discontinuation rate and reporting transient hyperbilirubinemia as the main adverse effect.
  • The treatment led to improved immune response (increased CD4 counts) and reduced HIV viral load, but more research is needed to fully understand its safety and effectiveness for children and adolescents.
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Despite considerable progress in paediatric HIV treatment and timely revision of global policies recommending the use of more effective and tolerable antiretroviral regimens, optimal antiretroviral formulations for infants, children, and adolescents remain limited. The Paediatric Antiretroviral Drug Optimization group reviews medium-term and long-term priorities for antiretroviral drug development to guide industry and other stakeholders on formulations most needed for low-income and middle-income countries. The group convened in December, 2018, to assess progress since the previous meeting and update the list of priority formulations.

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Antiretroviral agents with long-acting properties have potential to improve treatment outcomes substantially for people living with HIV. In November 2017, the Long acting/Extended Release Antiretroviral Resource Program (LEAP) convened a workshop with the aim of shaping the research agenda and promoting early development of long-acting or extended release products for key populations: pregnant and lactating women, children aged up to 10 years, and adolescents aged 10-19 years. Goals included strategies and principles to ensure that the needs of children, adolescents, and pregnant and lactating women are considered when developing long-acting formulations.

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Background: Women living with HIV have a higher risk of adverse birth outcomes, but questions remain regarding their specific risk factors for stillbirth and the extent to which maternal HIV is associated with stillbirth.

Methods: Using data on pregnant women with HIV reported within population-based surveillance in the United Kingdom/Ireland, we described stillbirth rates in 2007-2015 stratified by type of antiretroviral therapy (ART) and evaluated risk factors using Poisson regression. General population stillbirth rates by maternal world region of origin were derived from national annual birth statistics, and compared with rates in women with HIV, using standardized stillbirth ratios with the general population as the reference.

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Purpose Of Review: The Native Hawaiian and Pacific Islander (NHPI) population is rapidly growing in the USA. NHPIs face significant health disparities and have a high prevalence of diabetes compared to the general US population.

Recent Findings: Recent culturally-adapted diabetes interventions have shown promise in addressing these disparities among NHPI communities.

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Recently, the US Food and Drug Administration and European Medicines Agency issued warnings on the use of dolutegravir and darunavir/cobicistat for treatment of pregnant women living with human immunodeficiency virus (HIV). It took 3-5 years to identify the risks associated with the use of these antiretroviral drugs, during which time pregnant women were exposed to these drugs in clinical care, outside of controlled clinical trial settings. Across all antiretroviral drugs, the interval between registration of new drugs and first data on pharmacokinetics and safety in pregnancy becoming available is around 6 years.

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Background: Questions remain regarding preterm delivery (PTD) risk in HIV-infected women on antiretroviral therapy (ART), including the role of ritonavir (RTV)-boosted protease inhibitors, timing of ART initiation and immune status.

Methods: We examined data from the UK/Ireland National Study of HIV in Pregnancy and Childhood on women with HIV delivering a singleton live infant in 2007-2015, including those pregnancies receiving RTV-boosted protease inhibitor-based (n = 4184) or nonnucleoside reverse transcriptase inhibitors-based regimens (n = 1889). We conducted logistic regression analysis adjusted for risk factors associated with PTD and stratified by ART at conception and CD4 cell count to minimize bias by indication for treatment and to assess whether PTD risk differs by ART class and specific drug combinations.

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Despite the importance of the hERG channel in drug discovery and the sizable number of antagonist molecules discovered, only a few hERG agonists have been discovered. Here we report a novel hERG agonist; SKF-32802 and a structural analog of the agonist NS3623, SB-335573. These were discovered through a similarity search of published hERG agonists.

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A previously translated Diabetes Prevention Program Lifestyle Intervention (DPP-LI) was adapted for delivery as a worksite-based intervention, called PILI@Work, to address obesity disparities in Native Hawaiians/Pacific Islanders. This study examined the effectiveness of PILI@Work and factors associated with weight loss at post-intervention. Overweight/obese employees of 15 Native Hawaiian-serving organizations received the 3-month component of PILI@Work.

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Background: Perinatal depression among HIV-positive women has negative implications for HIV-related and other maternal and infant outcomes. The aim of this study was to investigate the burden and correlates of perinatal depression among HIV-positive women in Ukraine, a lower middle income country with one of the largest HIV-positive populations in Europe.

Methods: Cross-sectional surveys nested within the Ukraine European Collaborative Study were conducted of HIV-positive women at delivery and between 1 and 12 months postpartum.

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Native Hawaiians bear a disproportionate burden of type-2 diabetes and related complications compared to all other groups in Hawai'i (e.g., Whites, Japanese, Korean).

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Background: Women living with HIV are potentially at increased risk of adverse pregnancy outcomes, due to a range of factors, including immunosuppression, use of combination antiretroviral therapy (ART), and injecting drug use. Rates of mother-to-child transmission of HIV in Ukraine have declined to around 2-4%, but little is known about other pregnancy outcomes in this setting. We used data from an observational prospective cohort study to assess pregnancy outcomes among HIV-positive women in Ukraine.

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Native Hawaiians and Pacific Islanders (NHPI) have higher rates of excess body weight and related medical disorders, such as diabetes and cardiovascular disease, compared to other ethnic groups in Hawai'i. To address this metabolic health inequity, the Partnership for Improving Lifestyle Intervention (PILI) 'Ohana Project, a community-academic partnership, was formed over eight years ago and developed two community-placed health promotion programs: the PILI Lifestyle Program (PLP) to address overweight/obesity and the Partners in Care (PIC) to address diabetes self-care. This article describes and reviews the innovations, scientific discoveries, and community capacity built over the last eight years by the PILI 'Ohana Project's (POP) partnership in working toward metabolic health equity.

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Background: Poor adherence to antiretroviral therapy (ART) is associated with HIV disease progression and, during pregnancy, increased mother-to-child transmission risk. In Ukraine, access to combination ART is expanding but data on adherence are scarce.

Methods: Cross-sectional surveys of HIV-positive women were conducted i) at delivery (on antenatal ART adherence) and ii) during the first year postpartum (on ART adherence in the preceding four weeks).

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Often overlooked explanations for the varied obesity rates across ethno-cultural groups include differences in attitudes toward excess weight, with certain populations assumed to have larger ideal body sizes (IBS). Past studies found ethnic and gender difference in IBS across and within different groups. This study examined the effects of ethnicity and gender, and their interaction, in accounting for differences in IBS and attitudes toward those ideals.

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Objectives: To analyze mother-to-child HIV transmission (MTCT) rates over time in light of changes in management, demographic, and pregnancy characteristics.

Design: Population-based surveillance data on diagnosed HIV-positive women and their infants are routinely collected in the UK and Ireland.

Methods: A total of 12486 singleton pregnancies delivered in 2000-2011 were analyzed.

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Objective: To investigate the scale-up of antenatal combination antiretroviral therapy (cART) in Ukraine since this became part of the national policy for the prevention of mother-to-child transmission (PMTCT) of human immunodeficiency virus (HIV).

Methods: Data on 3535 HIV-positive pregnant women who were enrolled into the Ukraine European Collaborative Study in 2008-2010 were analysed. Factors associated with receipt of zidovudine monotherapy (AZTm) - rather than cART - and rates of mother-to-child transmission (MTCT) of HIV were investigated.

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Compound-induced prolongation of the cardiac QT interval is a major concern in drug development and this unit discusses approaches that can predict QT effects prior to undertaking clinical trials. The majority of compounds that prolong the QT interval block the cardiac rapid delayed rectifier potassium current, IKr (hERG). Described in this overview are different ways to measure hERG, from recent advances in automated electrophysiology to the quantification of channel protein trafficking and binding.

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