Publications by authors named "Jon Oskarsson"

Monoclonal gammopathy of undetermined significance (MGUS) is the asymptomatic precursor of multiple myeloma and related diseases but has also been associated with thrombosis. Prior studies have not been based on screened cohorts leading to bias. We assessed the risk of thrombosis in a cohort of 75 422 individuals over 40 years old who were screened for MGUS in Iceland.

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Hypercalcemia in monoclonal gammopathy of undetermined significance (MGUS) presents a clinical challenge since it may indicate progression to multiple myeloma (MM) but could also be due to a multitude of unrelated disorders. To inform the approach to this clinical challenge, we conducted a nested cohort study within the iStopMM screening study. Of the 75,422 Icelanders aged 40 years and above who underwent screening for MGUS, we included 2,546 with MGUS who were in active follow-up, including regular serum calcium measurements.

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Light-chain (LC) monoclonal gammopathy of undetermined significance (MGUS) is a precursor of multiple myeloma (MM) and related conditions. LC-MGUS is characterized by free light-chain (FLC) levels outside defined reference intervals, indirectly indicating underlying plasma cell (PC) monoclonality. Next-generation flow cytometry (NGF) was used to evaluate clonal PC presence in bone marrow (BM) samples from individuals with LC-MGUS in the iStopMM study, aiming to assess the predictive value of the FLC ratio for clonal PC presence and its prognostic implications.

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Monoclonal gammopathy of undetermined significance (MGUS) is the precursor of multiple myeloma (MM) and related disorders. MGUS is characterized by asymptomatic paraproteinemia. In some cases, multiple paraproteins can be identified but the clinical implications of this phenomenon are poorly understood.

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In a low-barrier long-acting PrEP program in a safety-net setting, permitting same-day or next-day initiation, 85% of injections were on-time, and six-month retention was 83%, surpassing outcomes from most previously-reported oral PrEP studies. With drop-in, wrap-around services, similar retention among housing-insecure populations was seen. Long-acting PrEP expansion is urgently needed.

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Article Synopsis
  • A study at the Ward 86 HIV clinic in San Francisco investigated the effectiveness of long-acting cabotegravir/rilpivirine (LA-CAB/RPV) in rapidly achieving and maintaining viral suppression in people with HIV who initially had high viral loads.
  • Out of 59 participants who started LA-CAB/RPV with detectable viremia, 80% achieved sustained viral suppression after 48 weeks, while overall 92% had viral suppression when considering those who switched treatments.
  • The findings suggest that LA-CAB/RPV can significantly aid individuals struggling with adherence to oral HIV medications, highlighting its potential as an effective long-term treatment option.
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Background: Injectable cabotegravir (CAB)/rilpivirine (RPV) is the only combination long-acting (LA) antiretroviral regimen approved for HIV. RPV may not be effective among individuals with non-nucleoside reverse transcriptase inhibitor (NNRTI) resistance, which has >10% prevalence in many countries. Lenacapavir (LEN) is an LA capsid inhibitor given every 6 months, but has not been studied in combination with other LA agents.

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Background: Early evidence suggests long-acting injectable cabotegravir and rilpivirine (LA-CAB/RPV) may be beneficial for people with HIV (PWH) who are unable to attain viral suppression (VS) on oral therapy. Limited guidance exists on implementation strategies for this population.

Setting: Ward 86, a clinic serving publicly insured PWH in San Francisco.

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There is some evidence that a prior cancer is a risk factor for the development of multiple myeloma (MM). If this is true, prior cancer should be associated with a higher prevalence or increased progression rate of monoclonal gammopathy of undetermined significance (MGUS), the precursor of MM and related disorders. Those with a history of cancer might therefore constitute a target population for MGUS screening.

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Monoclonal gammopathy of undetermined significance (MGUS) is the earliest discernible stage of multiple myeloma (MM) and Waldenström's macroglobulinemia (WM). Early diagnosis of MG may be compromised by the low-level infiltration, undetectable to low-sensitive methodologies. Here, we investigated the prevalence and immunophenotypic profile of clonal (c) plasma cells (PC) and/or cB-lymphocytes in bone marrow (BM) and blood of subjects with a serum M-component from the iSTOPMM program, using high-sensitive next-generation flow cytometry (NGF), and its utility in the diagnostic classification of early-stage MG.

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Hemodilution of bone marrow (BM) aspirates is a limitation of multiparameter flow cytometry (MFC) in plasma cell disorders. There is a need for a validated approach for assessing sample quality and the distribution of non-plasma cell BM populations by MFC could provide a solution. We evaluated BM-associated cell populations, assessed by next-generation flow cytometry (NGF) and white blood cell (WBC) count in 351 BM aspirated samples from 219 participants with plasma cell disorders in the Iceland Screens, Treats, or Prevents MM study (iStopMM), as markers of hemodilution by their discriminatory ability between first and (generally more hemodiluted) second pull BM aspirated samples.

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Background: Intramuscular cabotegravir (CAB) and rilpivirine (RPV) is the only long-acting antiretroviral therapy (LA-ART) regimen approved for people with HIV (PWH). Long-acting ART holds promise for improving outcomes among populations with barriers to adherence but is only approved for PWH who have virologic suppression with use of oral ART before initiating injectables.

Objective: To examine LA-ART in a population of PWH that includes those with viremia.

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Introduction: Rural medicine is in many ways different from urban primary care. In addition to providing primary care for a population, the rural doctor is tasked with the initial evaluation and stabilization of all emergencies usually managed by an Emergency Department in urban areas. The goal of this study was to assess rural doctors' in Iceland attendance of courses in Emergency Medicine (EM), how rural doctors grade their own ability to respond to emergencies and evaluate their Continuous Medical Education (CME) within the field of EM.

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Smoldering multiple myeloma (SMM) is an asymptomatic precursor to multiple myeloma. Here we define the epidemiological characteristics of SMM in the general population in Iceland. The iStopMM study (ClinicalTrials.

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Background: Long-acting injectable antiretroviral therapy (LAI-ART) is approved for treatment-naive or experienced people with human immunodeficiency virus (HIV; PWH) based on trials that only included participants with viral suppression. We performed the first LAI-ART demonstration project to include PWH unable to achieve or maintain viral suppression due to challenges adhering to oral ART.

Methods: Ward 86 is a large HIV clinic in San Francisco that serves publicly insured and underinsured patients.

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Background: After coronavirus disease 2019 (COVID-19) shelter-in-place (SIP) orders, viral suppression (VS) rates initially decreased within a safety-net human immunodeficiency virus (HIV) clinic in San Francisco, particularly among people living with HIV (PLWH) who are experiencing homelessness. We sought to determine if proactive outreach to provide social services, scaling up of in-person visits, and expansion of housing programs could reverse this decline.

Methods: We assessed VS 24 months before and 13 months after SIP using mixed-effects logistic regression followed by interrupted time series (ITS) analysis to examine changes in the rate of VS per month.

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Background: Multiple myeloma (MM) measurable residual disease (MRD) evaluated by flow cytometry is a surrogate for progression-free and overall survival in clinical trials. However, analysis and reporting between centers lack uniformity. We designed and evaluated a consensus protocol for MM MRD analysis to reduce inter-laboratory variation in MM MRD reporting.

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The combined burden of geriatric conditions, comorbidities, and HIV requires a model of HIV care that offers a comprehensive clinical approach with people 50 years or older with HIV. Golden Compass is an outpatient, multidisciplinary HIV-geriatrics program with an onsite HIV geriatrician, cardiologist, pharmacist, and social worker, offering specialist referrals, care navigation, and classes on improving functional status and cognition. Participants (13 patients and 11 primary care providers) were recruited using a non-probability sampling method to participate in semi-structured interviews on the perceived impact of Golden Compass on care delivered to older people with HIV.

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Objective: Homelessness is the greatest risk factor for HIV viremia in San Francisco. Innovative care models for people with HIV (PWH) with homelessness or unstable housing (HUH) are needed to address this inequity. We developed a novel low-barrier clinic-based program for PWH-HUH in an urban safety-net clinic ('POP-UP') and report outcomes on care engagement and viral suppression.

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Monoclonal gammopathy of undetermined significance (MGUS) precedes multiple myeloma (MM). Population-based screening for MGUS could identify candidates for early treatment in MM. Here we describe the Iceland Screens, Treats, or Prevents Multiple Myeloma study (iStopMM), the first population-based screening study for MGUS including a randomized trial of follow-up strategies.

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Introduction: The COVID-19 pandemic has required a shift of many routine primary care visits to telemedicine, potentially widening disparities in care access among vulnerable populations. In a publicly-funded HIV clinic, we aimed to evaluate a pre-visit phone-based planning intervention to address anticipated barriers to telemedicine.

Methods: We conducted a pragmatic randomized controlled trial of patients scheduled for a phone-based HIV primary care visit at the Ward 86 HIV clinic in San Francisco from 15 April to 15 May 2020.

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Coronavirus disease-2019 (COVID-19) threatens to further worsen HIV outcomes among people experiencing homelessness. We conducted an interrupted time-series analysis of care engagement and viral suppression among unhoused individuals in the 'POP-UP' low-barrier, high-intensity HIV primary care program during COVID-19. Among 85 patients, care engagement and viral suppression did not decrease in the 5 months following implementation of San Francisco's 'shelter-in-place' ordinance.

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Chemical investigation of the marine bryozoan collected in Iceland resulted in isolation of 13 new bromotryptamine alkaloids, flustramines Q-W (-) and flustraminols C-H (-), and two new imidazole alkaloids, flustrimidazoles A and B ( and ), together with 12 previously described compounds (-). Their structures were established by detailed spectroscopic analysis using 1D and 2D NMR and HRESIMS. Structure was verified by calculations of the C and H NMR chemical shifts using density functional theory.

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