Publications by authors named "Krueger D"

Objective: Tuberous sclerosis complex (TSC) results from overactivity of the mechanistic target of rapamycin (mTOR). Sirolimus and everolimus are mTOR inhibitors that treat most facets of TSC but are understudied in infants. We sought to understand the safety and potential efficacy of preventative sirolimus in infants with TSC.

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Objective: Peer recovery support specialists (PRSS) are essential members of the behavioral health workforce. While factors contributing to PRSS job satisfaction and burnout have been examined, less is understood about why PRSS consider leaving or remaining in their roles. This study sought to identify personal, professional, and organizational factors related to PRSS' intentions to leave their current position.

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  • The mammalian pancreas has three key parts: exocrine acini and ducts, along with endocrine islets, all originating from a common progenitor during development.
  • Researchers created 18 human fetal pancreas organoid lines from samples between 8-17 weeks of gestation, with four lines showing the ability to produce all three cell types while thriving in culture for over two years.
  • Single-cell RNA sequencing revealed LGR5 cells as crucial developmental stem cells, indicating that these organoids are capable of long-term growth and can differentiate into acinar, ductal, and endocrine cells.
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  • A rare, gram-negative, non-fermenting bacterium was identified as a potential pathogen linked to musculoskeletal infections, with a documented case found in an 80-year-old female after hip fracture surgery.
  • The patient suffered from tenderness and swelling at the surgical site six months post-operation, leading to the diagnosis of an osteosynthesis-associated infection (OAI) confirmed by microbiological tests.
  • Treatment involved a two-stage surgical revision and a two-month antibiotic regimen, resulting in the patient being infection-free and satisfied two years after the surgery.
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  • The study investigates the relationship between early seizures and intellectual disability in children with tuberous sclerosis complex (TSC), focusing on how timing and frequency of seizures affect development.
  • Researchers analyzed data from 129 TSC patients over 36 months, using machine learning to identify neurodevelopmental subgroups and effective biomarkers for predicting outcomes.
  • Findings indicate that the total number of seizures (accumulated seizure burden) is a stronger predictor of cognitive development at 36 months than the age at which seizures begin, highlighting the importance of seizure management for better developmental outcomes.
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  • Epilepsy is common in patients with tuberous sclerosis complex (TSC), and this study evaluates the effectiveness of cenobamate (CBM) as an additional treatment for seizures in this group.
  • A review identified 54 patients treated with CBM, revealing that while many experienced a reduction in seizures, the rates of significant improvement (≥50% reduction) and complete seizure freedom were lower compared to other studies.
  • Common side effects included sedation and gastrointestinal issues, suggesting further focus is needed on adjusting concurrent medications to improve treatment retention and outcomes.
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Enteroendocrine cells (EECs) are gut epithelial cells that respond to intestinal contents by secreting hormones, including the incretins glucagon-like peptide 1 (GLP-1) and gastric inhibitory protein (GIP), which regulate multiple physiological processes. Hormone release is controlled through metabolite-sensing proteins. Low expression, interspecies differences, and the existence of multiple EEC subtypes have posed challenges to the study of these sensors.

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In mice, intestinal tuft cells have been described as a long-lived, postmitotic cell type. Two distinct subsets have been identified: tuft-1 and tuft-2 (ref. ).

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  • The introduction of dual-energy X-ray absorptiometry (DXA) in the 1980s transformed how osteoporosis is diagnosed and managed globally.
  • DXA results can be impacted by various technical factors, including instrument quality, patient positioning, and the interpretation of T-scores and Z-scores.
  • This report aims to highlight important technical and clinical elements of DXA use and discusses how to better integrate these practices into clinical settings, along with considering non-bone mineral density measurements.
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Background: Everolimus therapy has been approved in Tuberous Sclerosis Complex (TSC), for drug-resistant epilepsy as adjunctive therapy. A novel anti-seizure medication is cenobamate, which was approved for adults as adjunctive treatment for focal-onset seizures in drug-resistant epilepsy and is now commonly used in patients with TSC. Drug-drug interactions between cenobamate and mammalian target of rapamycin (mTORi) have not been prospectively evaluated, even though these agents are frequently administered together.

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Background: To date, long-term results of the arthroscopic repair of glenoid rim fractures are missing. The aim of this study was, to evaluate clinical and radiographic results following arthroscopic repair of anteroinferior glenoid fractures using anchors or bioabsorbable compression screws after a mean follow-up period of 10 years.

Methods: Clinical outcome measures included evaluation of recurrent instability, the Constant Score, Subjective Shoulder Value, Rowe Score (RS), Western Ontario Shoulder Instability Score, and Melbourne Instability Shoulder Score.

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Purpose: Orthopedic surgeons can assess bone status intraoperatively and recommend skeletal health evaluation for patients with poor bone quality. Intraoperative physician assessment (IPA) at the time of total knee arthroplasty correlates with preoperative DXA-measured bone mineral density (BMD). This study evaluated IPA during total hip arthroplasty (THA) as a quantitative measure of bone status based on tactile assessment.

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  • Children with tuberous sclerosis complex (TSC) have a high risk of developing drug-resistant epilepsy (DRE), making it crucial to identify those at greatest risk for timely management.
  • The study analyzed data from 70 infants with TSC to evaluate the relationship between specific TSC genotypes and the likelihood of experiencing DRE, using a variety of statistical methods.
  • Findings revealed that TSC2 pathogenic variants were strongly linked to DRE, with all DRE cases found in participants carrying TSC2 mutations; in contrast, TSC1 variants were associated with later-onset epilepsy, highlighting important differences in risk profiles.
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  • Ninety percent of patients with tuberous sclerosis complex (TSC) experience seizures, and about half have epilepsy that doesn't respond to medication.
  • A study explored how the size and number of seizure onset zones (SOZ) affect surgical outcomes in TSC patients who underwent epilepsy surgery.
  • The findings revealed that larger SOZ sizes and having more than one SOZ were linked to poorer surgical outcomes, suggesting that these characteristics could help predict the success of surgery in reducing seizures.
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Heterozygous de novo or inherited gain-of-function mutations in the MTOR gene cause Smith-Kingsmore syndrome (SKS). SKS is a rare autosomal dominant condition, and individuals with SKS display macrocephaly/megalencephaly, developmental delay, intellectual disability, and seizures. A few dozen individuals are reported in the literature.

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Background And Objectives: Integrated behavioral health (IBH) delivered in primary care is critical to addressing the growing behavioral health crisis in the United States. COVID-19 prompted changes to the core components of IBH, causing the model to shift. The specifics of how IBH teams adapted and what these adaptations mean for the future of IBH teams in primary care are uncertain.

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Introduction: Harm reduction utilizes evidence-based strategies to reduce the negative health and social impacts of substance use. As harm reduction services expand across the U.S.

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Preparation requires technical research and development, as well as adaptive, proactive governance.

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Abnormalities in white matter development may influence development of autism spectrum disorder in tuberous sclerosis complex (TSC). Our goals for this study were as follows: (1) use data from a longitudinal neuroimaging study of tuberous sclerosis complex (TACERN) to develop optimized linear mixed effects models for analyzing longitudinal, repeated diffusion tensor imaging metrics (fractional anisotropy, mean diffusivity) pertaining to select white matter tracts, in relation to positive Autism Diagnostic Observation Schedule-Second Edition classification at 36 months, and (2) perform an exploratory analysis using optimized models applied to all white matter tracts from these data. Eligible participants (3-12 months) underwent brain magnetic resonance imaging (MRI) at repeated time points from ages 3 to 36 months.

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Unlabelled: Joint replacement surgery is common in older adults, leading to increasing periprosthetic fracture (PPFx) occurrence. We reviewed all PPFx seen over a 4-year period at an academic hospital. Clinical osteoporosis could be diagnosed based on existing data in 104 (67%) at the time of PPFx.

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Common genetic variants identified in the general population have been found to increase phenotypic risks among individuals with certain genetic conditions. Up to 90% of individuals with tuberous sclerosis complex (TSC) are affected by some type of epilepsy, yet the common variants contributing to epilepsy risk in the general population have not been evaluated in the context of TSC-associated epilepsy. Such knowledge is important to help uncover the underlying pathogenesis of epilepsy in TSC which is not fully understood, and critical as uncontrolled epilepsy is a major problem in this population.

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Introduction: Bone density measured using dual-energy X-ray absorptiometry (DXA) volume, performance site and interpreters have changed in the US since 2005. The purpose of this report is to provide updated trends in DXA counts, rates, place of service and interpreter specialty for the Medicare fee-for-service population.

Methods: The 100 % Medicare Physician/Supplier Procedure Summary Limited Data Set between 2005-2019 was used.

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Introduction: This position development conference (PDC) Task Force examined the use and reporting of bilateral hip bone mineral density (BMD) measurements. This was deemed appropriate as increased availability of Dual-energy X-ray Absorptiometry (DXA) technology offering bilateral hip measurement resulted in more routine clinical use. The International Society for Clinical Densitometry Official Positions accept bilateral hip BMD measurement for clinical use but currently do not include recommendations for reporting those studies.

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Introduction: Professional guidance and standards assist radiologic interpreters in generating high quality reports. Initially DXA reporting Official Positions were provided by the ISCD in 2003; however, as the field has progressed, some of the current recommendations require revision and updating. This manuscript details the research approach and provides updated DXA reporting guidance.

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Incomplete atypical femur fractures (iAFFs) are associated with the long-term use of anti-resorptive therapies. Although X-rays are typically used to screen for iAFFs, images from dual-energy X-ray absorptiometry (DXA) offer an alternate method for detecting iAFFs. Although a previous 2019 ISCD Official Position on this subject exists, our task force aimed to update the literature review and to propose recommendations on reporting findings related to iAFFs that may be observed on DXA images.

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