Publications by authors named "Susan Cohn"

Peripheral neuroblastic tumours are the most common extracranial solid neoplasms occurring in children. Proper classification is critical for directing therapy and predicting prognosis. Nonetheless, their relative rarity makes accurate pathological assessment challenging, even for experienced pathologists.

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A deep learning model using attention-based multiple instance learning (aMIL) and self-supervised learning (SSL) was developed to perform pathologic classification of neuroblastic tumors and assess MYCN-amplification status using H&E-stained whole slide images from the largest reported cohort to date. The model showed promising performance in identifying diagnostic category, grade, mitosis-karyorrhexis index (MKI), and MYCN-amplification with validation on an external test dataset, suggesting potential for AI-assisted neuroblastoma classification.

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Article Synopsis
  • Tumor invasion of the spinal canal occurs in about 15% of newly diagnosed neuroblastoma patients, prompting a need for effective treatment strategies that optimize survival while minimizing long-term effects.
  • A study of 92 intermediate-risk neuroblastoma patients with intraspinal tumors revealed that nearly half were symptomatic at diagnosis, but most of them experienced complete resolution of symptoms following treatment, regardless of the initial severity or duration of their deficits.
  • The findings suggest that while prompt diagnosis and chemotherapy are crucial, surgical options like laminectomy may not significantly improve motor symptoms, indicating that surgery should be reserved for cases with rapid worsening neurologic conditions.
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Background: HIV-1 antiretroviral therapy (ART) alters hormonal contraceptive levels delivered via intravaginal ring (IVR) in a regimen specific manner. We explored the role of the IVR on vaginal microbial communities, vaginal short chain fatty acids (SCFAs), vaginal HIV shedding, and the effect of vaginal microbes on hormone concentrations in cisgender women with HIV (WWH).

Methods: Vaginal microbes were assessed by 16S RNA sequencing of weekly vaginal swabs, vaginal SCFA by mass spectrometry, HIV-1 shedding by nucleic acid amplification on vaginal aspirates, and bacterial vaginosis by Nugent scoring from 74 participants receiving an etonorgestrel/ethinyl estradiol (ENG/EE) intravaginal ring while on no ART (N=25), efavirenz-based ART (N=25), or atazanavir-based ART (N=24).

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Background: The International Neuroblastoma Risk Group (INRG) classifier utilizes a staging system based on pretreatment imaging criteria in which image-defined risk factors (IDRFs) are used to evaluate the extent of locoregional disease. Children's Oncology Group (COG) study ANBL0531 prospectively examined institutional determination of IDRF status and compared that to a standardized central review.

Methods: Between 9/2009-6/2011, patients with intermediate-risk neuroblastoma were enrolled on ANBL0531 and had IDRF assessment at treating institutions.

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Background: Lacticaseibacillus (formerly Lactobacillus) rhamnosus is widely used in probiotics or food supplements to promote microbiome health and may also be part of the normal microbiota of the human gastrointestinal tract. However, it rarely also causes invasive or severe infections in patients. It has been postulated that these infections may originate from probiotics or from endogenous commensal reservoirs.

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Unlabelled: Recent insights have identified adrenergic (ADRN) and mesenchymal (MES) cell lineages as distinct biologic cell types and T-cell inflammation as a prognostic marker in neuroblastoma. We hypothesized that elucidating unique and overlapping aspects of these biologic features could serve as novel biomarkers for informing ongoing efforts to improve therapeutic approaches for children with high-risk neuroblastoma. We identified lineage-specific, single-stranded super-enhancers to define ADRN and MES specific genes.

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A deep learning model using attention-based multiple instance learning (aMIL) and self-supervised learning (SSL) was developed to perform pathologic classification of neuroblastic tumors and assess -amplification status using H&E-stained whole slide digital images. The model demonstrated strong performance in identifying diagnostic category, grade, mitosis-karyorrhexis index (MKI), and -amplification on an external test dataset. This AI-based approach establishes a valuable tool for automating diagnosis and precise classification of neuroblastoma tumors.

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Background: We previously reported excellent three-year overall survival (OS) for patients with newly diagnosed intermediate-risk neuroblastoma treated with a biology- and response-based algorithm on the Children's Oncology Group study ANBL0531. We now present the long-term follow-up results.

Methods: All patients who met the age, stage, and tumor biology criteria for intermediate-risk neuroblastoma were eligible.

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Purpose: Although the International Neuroblastoma Risk Group Data Commons (INRGdc) has enabled seminal large cohort studies, the research is limited by the lack of real-world, electronic health record (EHR) treatment data. To address this limitation, we evaluated the feasibility of extracting treatment data directly from EHRs using the REDCap Clinical Data Interoperability Services (CDIS) module for future submission to the INRGdc.

Methods: Patients enrolled on the Children's Oncology Group neuroblastoma biology study ANBL00B1 (ClinicalTrials.

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The N-methyladenosine (mA) RNA modification is an important regulator of gene expression. mA is deposited by a methyltransferase complex that includes methyltransferase-like 3 (METTL3) and methyltransferase-like 14 (METTL14). High levels of METTL3/METTL14 drive the growth of many types of adult cancer, and METTL3/METTL14 inhibitors are emerging as new anticancer agents.

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Article Synopsis
  • - The study examined the effects of starting antiretroviral therapy (ART) during acute or early HIV infection on the viral reservoir and immune responses in participants from various regions.
  • - Results showed that starting ART earlier resulted in lower levels of HIV DNA in the blood, particularly for those who began treatment in the very early stages of infection, but it did not fully eliminate the presence of HIV-infected cells.
  • - Despite achieving viral suppression at 48 weeks, the study found no strong correlation between HIV DNA levels and the strength of HIV-specific T cell immune responses, suggesting that early treatment may reduce, but not completely prevent, viral rebound after stopping ART.
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Background: Early efforts at risk-adapted therapy for neuroblastoma are predicted to result in differential late effects; the magnitude of these differences has not been well described.

Methods: Late mortality, subsequent malignant neoplasms (SMNs), and severe/life-threatening chronic health conditions (CHCs), graded according to CTCAE v4.03, were assessed among 5-year Childhood Cancer Survivor Study (CCSS) survivors of neuroblastoma diagnosed 1987-1999.

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Background: Racial/ethnic survival disparities in neuroblastoma were first reported more than a decade ago. We sought to investigate if these disparities have persisted with current era therapy.

Methods: Two patient cohorts were identified in the International Neuroblastoma Risk Group Data Commons (INRGdc) (Cohort 1: diagnosed 2001-2009, n=4359; Cohort 2: diagnosed 2010-2019, n=4891).

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Background: Many parents of children with advanced cancer report curative goals and continue intensive therapies that can compound symptoms and suffering. Factors that influence parents to choose palliation as the primary treatment goal are not well understood. The objective of this study was to examine experiences impacting parents' report of palliative goals adjusted for time.

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Background: Cell-free DNA (cfDNA) profiles of 5-hydroxymethylcytosine (5-hmC), an epigenetic marker of open chromatin and active gene expression, are correlated with metastatic disease burden in patients with neuroblastoma. Neuroblastoma tumors are comprised of adrenergic (ADRN) and mesenchymal (MES) cells, and the relative abundance of each in tumor biopsies has prognostic implications. We hypothesized that ADRN and MES-specific signatures could be quantified in cfDNA 5-hmC profiles and would augment the detection of metastatic burden in patients with neuroblastoma.

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Objectives: Women are under-represented in clinical trials and must often commit to using contraception to enroll. We sought to determine the incidence and predictors of pregnancy in women participating in HIV treatment trials.

Design: Individual participant data meta-analysis.

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Article Synopsis
  • Cell-free DNA (cfDNA) profiles of 5-hydroxymethylcytosine (5-hmC) correlate with metastatic disease burden in neuroblastoma patients, highlighting its potential as an epigenetic marker for monitoring cancer progression.
  • The study involved quantifying ADRN (adrenergic) and MES (mesenchymal) specific gene signatures in cfDNA from high-risk neuroblastoma patients, finding higher signature scores associated with increased metastatic burden.
  • While the methodology proved effective for detecting these signatures, further research is needed to enhance clinical application, with ongoing evaluations in larger patient cohorts.
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  • The study investigated the role of T-cell inflammation (TCI) as a prognostic marker in neuroblastoma, a type of cancer that can exist in two forms: adrenergic (ADRN) and mesenchymal (MES).
  • Researchers analyzed RNA-seq data to categorize tumors based on their specific gene expressions and TCI scores, discovering 159 MES genes and 373 ADRN genes, with varying correlations to survival rates.
  • Results indicated that high TCI scores were linked to better survival outcomes in ADRN tumors, suggesting that TCI could guide treatment strategies for high-risk neuroblastoma patients.
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Objective: In AIDS Clinical Trials Group study A5375, a pharmacokinetic trial of levonorgestrel emergency contraception, double-dose levonorgestrel (3 mg, versus standard dose 1.5 mg) offset the induction effects of efavirenz or rifampin on plasma levonorgestrel exposure over 8 h post-dose (AUC 0-8h ). We characterized the pharmacogenetics of these interactions.

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Purpose: In 2006, Children's Oncology Group (COG) reclassified subgroups of toddlers diagnosed with neuroblastoma from high-risk to intermediate-risk, when the age cutoff for high-risk assignment was raised from 365 days (12 months) to 547 days (18 months). The primary aim of this retrospective study was to determine if excellent outcome was maintained after assigned reduction of therapy.

Patients And Methods: Children <3 years old at diagnosis, enrolled on a COG biology study from 1990 to 2018, were eligible (n = 9,189).

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Article Synopsis
  • The study assessed the pharmacokinetics of double-dose levonorgestrel (LNG) implants in Ugandan women taking efavirenz-based HIV treatment to see if it could counteract any drug interactions.
  • Participants were divided into two groups: one receiving a higher dose of LNG with ART (300LNG+ART) and the other receiving a standard dosage (150LNG), with plasma LNG levels measured over 48 weeks.
  • Results showed that the higher dose had a 34% lower concentration of LNG compared to the standard dose, indicating that the double-dose did not fully mitigate the interaction with efavirenz.
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Survival for patients with recurrent central nervous system (CNS) neuroblastoma remains poor. A single-institutional study demonstrated the potential of multimodality therapy, including compartmental intrathecal radioimmunotherapy (cRIT) with I-3F8 or I-8H9 to increase the survival of neuroblastoma patients with CNS relapse. However, not all patients are able to receive this therapy.

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