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Nanoscale secondary ion mass spectrometry (NanoSIMS) makes it possible to visualize elements and isotopes in a wide range of samples at a high resolution. However, the fidelity and quality of NanoSIMS images often suffer from distortions because of a requirement to acquire and integrate multiple image frames. We developed an optical flow-based algorithm tool, NanoSIMS Stabilizer, for all-channel postacquisition registration of images. The NanoSIMS Stabilizer effectively deals with the distortions and artifacts, resulting in a high-resolution visualization of isotope and element distribution. It is open source with an easy-to-use ImageJ plugin and is accompanied by a Python version with GPU acceleration.
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PURPOSE: Describe spirituality's role in a sample of Hispanic adolescent and young adult (AYA) cancer survivors. METHODS: This phenomenology-informed convergent parallel mixed-methods study aimed to explore participants' lived experiences with hope during cancer treatments and cancer survivorship. A purposive sample of Hispanic AYAs who completed cancer treatments 2-5 years ago were virtually recruited for participation. Participants completed virtual semi-structured interviews about their experiences with hope during cancer treatments and cancer survivorship and prepared narratives about their experiences. Thematic analyses were iteratively performed across the data set to identify final themes. RESULTS: Ten Hispanic AYA cancer survivors (mean age 30.2, SD = 4.5) years participated in this pilot study. Seven participants (70%) were female, and three participants (30%) were male. Six participants (60%) experienced non-hematologic malignancies, and four participants (40%) experienced hematologic malignancies. Eight (80%) participants' language preference was Spanish, while two (20%) participants' language preference was English. The theme spirituality and subthemes living by faith, god as a resource, and spiritual gratitude were identified as concepts participants linked to their conceptualization of hope during cancer treatment and survivorship. CONCLUSIONS: Hope and spirituality may be conceptually linked to coping behaviors among Hispanic AYA cancer survivors. Hope through faith may be a learned spiritual value in Hispanic AYAs and might play a role in their spiritual and cognitive development. Further research is needed to explore the potentially protective value of hope and spirituality for the Hispanic AYA population.
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Supervivientes de Cáncer , Hispánicos o Latinos , Espiritualidad , Adolescente , Adulto , Femenino , Humanos , Masculino , Adulto Joven , Adaptación Psicológica , Supervivientes de Cáncer/psicología , Hispánicos o Latinos/psicología , Esperanza , Neoplasias/psicología , Neoplasias/terapia , Proyectos Piloto , Investigación CualitativaRESUMEN
Cationic surfactant coatings (e.g., CTAB) are commonly used in CE to control EOF and thereby improve separation efficiencies. However, our understanding of surfactant adsorption and desorption dynamics under EOF conditions is limited. Here, we apply automated zeta potential analysis to study the adsorption and desorption kinetics of CTAB in a capillary under different transport conditions: diameter, length, voltage alternation pattern and frequency, and applied pressure. In contrast to other studies, we observe slower kinetics at distinct capillary wall zeta potential ranges. Within these ranges, which we call "stagnant regimes," the EOF mobility significantly counteracts the electrophoretic (EP) mobility of CTA+ and hinders the net transport. By constructing a numerical model to compare with our experiments and recasting our experimental data in terms of the net CTA+ transport volume normalized by surface area, we reveal that the EP mobility of CTA+ and the capillary surface-area-to-volume ratio dictate the zeta potential range and the duration of the stagnant regime and thereby govern the overall reaction kinetics. Our results indicate that further transport-oriented studies can significantly aid in the understanding and design of electrokinetic systems utilizing CTAB and other charged surfactants.
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Compuestos de Cetrimonio , Cetrimonio , Electroforesis Capilar , Cetrimonio/química , Adsorción , Electroforesis Capilar/métodos , Compuestos de Cetrimonio/química , Cinética , Tensoactivos/química , Modelos Químicos , Electroósmosis/métodosRESUMEN
Acute stress is known to influence performance on various task outcomes indicative of executive functioning (i.e., the top-down, goal-directed control of cognition and behavior). The most common interpretation of these effects is that stress influences control processes themselves. Another possibility, though, is that stress does not impair control per se, but instead alters the affective dynamics underlying the recruitment of control (e.g., reducing the extent to which making an error is aversive), resulting in less recruitment of control and thus poor performance. To date, however, no work has examined whether stress effects on executive function outcomes are driven by affective dynamics related to the recruitment of control. In the current study, we found that acute stress influenced-and cortisol responses related to-both executive control-related performance outcomes (e.g., post-error slowing) and control-related affective dynamics (e.g., negative affect following recruitment of control) in a modified Stroop task, but that these effects appeared to be independent of each other: The effects of stress on, and associations of cortisol with, control-related cognitive outcomes were not statistically mediated by task- or control-related affective dynamics. These results thus suggest that although stress influences affective dynamics underlying executive function, the effects of stress on executive function outcomes appear to be at least partially dependent on nonaffective processes, such as control processes themselves.
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Emociones , Hidrocortisona , Emociones/fisiología , Cognición/fisiología , Función Ejecutiva/fisiología , Afecto/fisiologíaRESUMEN
INTRODUCTION: The pediatric nurse practitioner (PNP) workforce was designed to improve child health equity. We aimed to systematically review the evidence on facilitators and barriers to PNP practice. METHOD: We included empirical studies on PNP practice in the United States and excluded studies with non-identifiable PNP data. We applied Joanna Briggs Institute tools to appraise studies and applied critical interpretive synthesis principles to synthesize. RESULTS: The final sample is 26 studies, mostly published before 2013 and observational. Prescriptive privileges, training program availability, organizational climate, and telehealth are facilitators. Mandated physician supervision, reduced pediatric curricula, geographically disparate training programs, and poor data infrastructure are barriers. The sample is limited by a moderate to high risk of bias. DISCUSSION: Evidence suggests modifiable factors impact PNP practice and could have important implications for child health equity. We offer a theoretical model to guide robust research studying the PNP workforce and health equity.
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Profesionales de Enfermería Pediátrica , Humanos , Estados Unidos , Niño , Enfermería Pediátrica/educación , Enfermeras Practicantes/educaciónRESUMEN
The mRNA transcript of the human STMN2 gene, encoding for stathmin-2 protein (also called SCG10), is profoundly impacted by TAR DNA-binding protein 43 (TDP-43) loss of function. The latter is a hallmark of several neurodegenerative diseases, including amyotrophic lateral sclerosis (ALS). Using a combination of approaches, including transient antisense oligonucleotide-mediated suppression, sustained shRNA-induced depletion in aging mice, and germline deletion, we show that stathmin-2 has an important role in the establishment and maintenance of neurofilament-dependent axoplasmic organization that is critical for preserving the caliber and conduction velocity of myelinated large-diameter axons. Persistent stathmin-2 loss in adult mice results in pathologies found in ALS, including reduced interneurofilament spacing, axonal caliber collapse that drives tearing within outer myelin layers, diminished conduction velocity, progressive motor and sensory deficits, and muscle denervation. These findings reinforce restoration of stathmin-2 as an attractive therapeutic approach for ALS and other TDP-43-dependent neurodegenerative diseases.
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Esclerosis Amiotrófica Lateral , Animales , Ratones , Esclerosis Amiotrófica Lateral/metabolismo , Axones/fisiología , Desnervación , Proteínas de Unión al ADN/genética , Filamentos Intermedios/metabolismo , Filamentos Intermedios/patología , Neuronas Motoras/metabolismo , Estatmina/genética , Estatmina/metabolismoRESUMEN
Person-centered narrative interventions offer potential solutions to facilitate a connection between the person receiving care and the person delivering the care, to improve quality of care, and positively impact a patient's biopsychosocial well-being. This single-arm feasibility study investigates patient-reported outcomes and barriers/facilitators to the implementation of an all-virtually delivered person-centered narrative intervention into the person's electronic health record. Overall, electronic data collection for the patient-reported outcomes was feasible. All 15 participants felt participating in the study was "easy" and "enjoyable," and "not a burden." The facilitators of implementation included: "helpful to the clinician," "appreciated looking at me as whole person," "be seen and heard," "had a connection and trust," and "felt comfortable and relaxing." The barriers to implementation included: "completing all the paperwork," "being rushed for time to complete the PCNI," and some "emotion" during collection of narrative. The use of person-centered narrative interventions is a way to deploy dedicated tools to shift dehumanized healthcare delivery to a more humanized person-centered care that treats people as experts in their own life narratives by incorporating their beliefs, values, and preferences into their plan of care.
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In patients with amyotrophic lateral sclerosis (ALS), disease symptoms and pathology typically spread in a predictable spatiotemporal pattern beginning at a focal site of onset and progressing along defined neuroanatomical tracts. Like other neurodegenerative diseases, ALS is characterized by the presence of protein aggregates in postmortem patient tissue. Cytoplasmic, ubiquitin-positive aggregates of TDP-43 are observed in approximately 97% of sporadic and familial ALS patients, while SOD1 inclusions are likely specific to cases of SOD1-ALS. Additionally, the most common subtype of familial ALS, caused by a hexanucleotide repeat expansion in the first intron of the C9orf72 gene (C9-ALS), is further characterized by the presence of aggregated dipeptide repeat proteins (DPRs). As we will describe, cell-to-cell propagation of these pathological proteins tightly correlates with the contiguous spread of disease. While TDP-43 and SOD1 are capable of seeding protein misfolding and aggregation in a prion-like manner, C9orf72 DPRs appear to induce (and transmit) a 'disease state' more generally. Multiple mechanisms of intercellular transport have been described for all of these proteins, including anterograde and retrograde axonal transport, extracellular vesicle secretion, and macropinocytosis. In addition to neuron-to-neuron transmission, transmission of pathological proteins occurs between neurons and glia. Given that the spread of ALS disease pathology corresponds with the spread of symptoms in patients, the various mechanisms by which ALS-associated protein aggregates propagate through the central nervous system should be closely examined.
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Esclerosis Amiotrófica Lateral , Humanos , Esclerosis Amiotrófica Lateral/metabolismo , Superóxido Dismutasa-1/metabolismo , Agregado de Proteínas , Proteína C9orf72/genética , Proteínas de Unión al ADN/genética , Proteínas de Unión al ADN/metabolismoRESUMEN
The regulatory approvals of nusinersen and tofersen, plus the large body of clinical and preclinical data from other drugs, have significantly de-risked antisense technology for neurological diseases. The platform learnings over the last 2 decades can be applied to subsequent drugs to improve the efficiency of discovering effective neuro-therapeutics.
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Enfermedades del Sistema Nervioso , Oligonucleótidos Antisentido , Humanos , Oligonucleótidos Antisentido/uso terapéutico , Enfermedades del Sistema Nervioso/tratamiento farmacológico , Enfermedades del Sistema Nervioso/genéticaRESUMEN
BACKGROUND: Preserving persons' dignity is integral to nursing. More research is needed to explore how a diversity of patients, particularly those that experience illness from a young age, experience dignity. AIM: Describe the characteristics of dignity for persons living with serious illness. RESEARCH DESIGN: Using a secondary data set of twenty audio-recorded interviews, a thematic content analysis was conducted to identify characteristics of dignity. The research team employed van Gennip et al.'s, 2013 "Model of Dignity in Illness" (1) to create a codebook, which the authors utilized to independently code twenty narrative interview transcripts. PARTICIPANTS AND RESEARCH CONTEXT: Twenty persons living with serious illness of heart failure and/or dialysis-dependent renal failure who were admitted in an acute care hospital. ETHICAL CONSIDERATIONS: This study was approved on August 26, 2019, by the Colorado Multiple Institutional Review Board (COMIRB) IRB Protocol #19-1874. FINDINGS: Early-onset participants expressed markedly different dignity concerns than late-onset participants. In the individual domain, early-onset participants felt that their illness was "normal"; they did not experience the "healthy person to patient" transition described by older onset participants. In the relational domain, early-onset participants expressed that their relationships had already integrated their illness while late-onset participants felt that their illness harmed many of their relationships. In the societal domain, early-onset participants described dignity concerns related to how society impacted their ability to financially support themselves during their illness. DISCUSSION: Differences in the dignity experience of early-onset and late-onset participants are informed by Erikson's "Model of Development" and by Aranda and Jones feminist critique of dignity in healthcare. CONCLUSIONS: Persons with early-onset illness experience dignity differently. Awareness of the importance of work and financial independence to the experience of dignity for seriously ill patients may enhance persons' dignity experience.
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Diálisis Renal , Respeto , Humanos , Investigación Cualitativa , Edad de Inicio , FeminismoRESUMEN
Antisense oligonucleotides (ASOs) are short synthetic nucleic acids that recognize and bind to complementary RNA to modulate gene expression. It is well established that single-stranded, phosphorothioate-modified ASOs enter cells independent of carrier molecules, primarily via endocytic pathways, but that only a small portion of internalized ASO is released into the cytosol and/or nucleus, rendering the majority of ASO inaccessible to the targeted RNA. Identifying pathways that can increase the available ASO pool is valuable as a research tool and therapeutically. Here, we conducted a functional genomic screen for ASO activity by engineering GFP splice reporter cells and applying genome-wide CRISPR gene activation. The screen can identify factors that enhance ASO splice modulation activity. Characterization of hit genes uncovered GOLGA8, a largely uncharacterized protein, as a novel positive regulator enhancing ASO activity by â¼2-fold. Bulk ASO uptake is 2- to 5-fold higher in GOLGA8-overexpressing cells where GOLGA8 and ASOs are observed in the same intracellular compartments. We find GOLGA8 is highly localized to the trans-Golgi and readily detectable at the plasma membrane. Interestingly, overexpression of GOLGA8 increased activity for both splice modulation and RNase H1-dependent ASOs. Taken together, these results support a novel role for GOLGA8 in productive ASO uptake.
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Hope's role in the care of adolescents and young adults (AYAs) who have advanced cancer (AC) is not well understood. This study aimed to conceptualize the essence of hope among AYAs who have AC based on their lived experiences and illustrate hope through verbal and artistic depictions of the AYA's lived experiences. Fifteen AYAs, aged 12 to 21 years, diagnosed with AC completed two semistructured interviews to share their lived experiences of hope perspectives in the form of a descriptive narrative and a creative-art outcome. Participants who chose to draw pictures narrated the conceptual meanings based on elements of each picture. A board-certified art therapist performed a post hoc analysis of the drawings and participants' verbatim descriptions of their meanings. Five of the 15 AYA participants created drawings depicting their lived experiences of hope. The artistic process of mapping their cancer journey revealed distinct views of hope through nature landscapes and metaphors. Participants provided titles for their drawings such as "Over the Rainbow," "Growth in the Valley," and "The Light at the End of the Tunnel." The pictures embodied the AYAs' thoughts, perceptions, and lived experiences related to hope and its role during their cancer journey. Drawing is one simple art form that can facilitate an AYA's expression of well-being (including hope) beyond what may be verbally articulated. Creative art should be further researched as a screening tool to assess how AYAs with AC cope with an uncertain future and psychological and/or existential distress symptoms.
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Arteterapia , Neoplasias , Adolescente , Humanos , Adulto Joven , Neoplasias/terapia , NiñoRESUMEN
Tau plays a key role in Alzheimer's disease (AD) pathophysiology, and accumulating evidence suggests that lowering tau may reduce this pathology. We sought to inhibit MAPT expression with a tau-targeting antisense oligonucleotide (MAPTRx) and reduce tau levels in patients with mild AD. A randomized, double-blind, placebo-controlled, multiple-ascending dose phase 1b trial evaluated the safety, pharmacokinetics and target engagement of MAPTRx. Four ascending dose cohorts were enrolled sequentially and randomized 3:1 to intrathecal bolus administrations of MAPTRx or placebo every 4 or 12 weeks during the 13-week treatment period, followed by a 23 week post-treatment period. The primary endpoint was safety. The secondary endpoint was MAPTRx pharmacokinetics in cerebrospinal fluid (CSF). The prespecified key exploratory outcome was CSF total-tau protein concentration. Forty-six patients enrolled in the trial, of whom 34 were randomized to MAPTRx and 12 to placebo. Adverse events were reported in 94% of MAPTRx-treated patients and 75% of placebo-treated patients; all were mild or moderate. No serious adverse events were reported in MAPTRx-treated patients. Dose-dependent reduction in the CSF total-tau concentration was observed with greater than 50% mean reduction from baseline at 24 weeks post-last dose in the 60 mg (four doses) and 115 mg (two doses) MAPTRx groups. Clinicaltrials.gov registration number: NCT03186989 .
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Enfermedad de Alzheimer , Proteínas tau , Humanos , Proteínas tau/genética , Enfermedad de Alzheimer/tratamiento farmacológico , Enfermedad de Alzheimer/genética , Enfermedad de Alzheimer/líquido cefalorraquídeo , Oligonucleótidos Antisentido/uso terapéutico , Resultado del Tratamiento , Método Doble CiegoRESUMEN
Loss of nuclear TDP-43 is a hallmark of neurodegeneration in TDP-43 proteinopathies, including amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). TDP-43 mislocalization results in cryptic splicing and polyadenylation of pre-messenger RNAs (pre-mRNAs) encoding stathmin-2 (also known as SCG10), a protein that is required for axonal regeneration. We found that TDP-43 binding to a GU-rich region sterically blocked recognition of the cryptic 3' splice site in STMN2 pre-mRNA. Targeting dCasRx or antisense oligonucleotides (ASOs) suppressed cryptic splicing, which restored axonal regeneration and stathmin-2-dependent lysosome trafficking in TDP-43-deficient human motor neurons. In mice that were gene-edited to contain human STMN2 cryptic splice-polyadenylation sequences, ASO injection into cerebral spinal fluid successfully corrected Stmn2 pre-mRNA misprocessing and restored stathmin-2 expression levels independently of TDP-43 binding.
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Proteínas de Unión al ADN , Edición Génica , Poliadenilación , Empalme del ARN , Estatmina , Proteinopatías TDP-43 , Animales , Humanos , Ratones , Proteínas de Unión al ADN/metabolismo , Precursores del ARN/genética , Precursores del ARN/metabolismo , Estatmina/genética , Estatmina/metabolismo , Proteinopatías TDP-43/genética , Proteinopatías TDP-43/terapia , Sitios de Empalme de ARN , Oligonucleótidos Antisentido/genética , Proyección NeuronalRESUMEN
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease with an average age-of-onset of â¼60 years and is usually fatal within 2-5 years of diagnosis. Mouse models based upon single gene mutations do not recapitulate all ALS pathological features. Environmental insults may also contribute to ALS, and ß-N-methylamino-L-alanine (BMAA) is an environmental toxin linked with an increased risk of developing ALS. BMAA, along with cycasin, are hypothesized to be the cause of the Guam-ALS epicenter of the 1950s. We developed a multihit model based on low expression of a dominant familial ALS TDP-43 mutation (Q331K) and chronic low-dose BMAA exposure. Our two-hit mouse model displayed a motor phenotype absent from either lesion alone. By LC/MS analysis, free BMAA was confirmed at trace levels in brain, and were as high as 405 ng/mL (free) and 208 ng/mL (protein-bound) in liver. Elevated BMAA levels in liver were associated with dysregulation of the unfolded protein response (UPR) pathway. Our data represent initial steps towards an ALS mouse model resulting from combined genetic and environmental insult.
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Aminoácidos Diaminos , Esclerosis Amiotrófica Lateral , Enfermedades Neurodegenerativas , Animales , Ratones , Esclerosis Amiotrófica Lateral/inducido químicamente , Esclerosis Amiotrófica Lateral/genética , Esclerosis Amiotrófica Lateral/metabolismo , Enfermedades Neurodegenerativas/complicaciones , Neuronas Motoras/patología , Fenotipo , Aminoácidos Diaminos/toxicidad , Aminoácidos Diaminos/genética , Proteínas de Unión al ADN/genética , Proteínas de Unión al ADN/metabolismo , Modelos Animales de EnfermedadRESUMEN
For SMA patients with only two SMN2 copies, available therapies might be insufficient to counteract lifelong motor neuron (MN) dysfunction. Therefore, additional SMN-independent compounds, supporting SMN-dependent therapies, might be beneficial. Neurocalcin delta (NCALD) reduction, an SMA protective genetic modifier, ameliorates SMA across species. In a low-dose SMN-ASO-treated severe SMA mouse model, presymptomatic intracerebroventricular (i.c.v.) injection of Ncald-ASO at postnatal day 2 (PND2) significantly ameliorates histological and electrophysiological SMA hallmarks at PND21. However, contrary to SMN-ASOs, Ncald-ASOs show a shorter duration of action limiting a long-term benefit. Here, we investigated the longer-term effect of Ncald-ASOs by additional i.c.v. bolus injection at PND28. Two weeks after injection of 500 µg Ncald-ASO in wild-type mice, NCALD was significantly reduced in the brain and spinal cord and well tolerated. Next, we performed a double-blinded preclinical study combining low-dose SMN-ASO (PND1) with 2× i.c.v. Ncald-ASO or CTRL-ASO (100 µg at PND2, 500 µg at PND28). Ncald-ASO re-injection significantly ameliorated electrophysiological defects and NMJ denervation at 2 months. Moreover, we developed and identified a non-toxic and highly efficient human NCALD-ASO that significantly reduced NCALD in hiPSC-derived MNs. This improved both neuronal activity and growth cone maturation of SMA MNs, emphasizing the additional protective effect of NCALD-ASO treatment.