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The association between polymorphisms of the human ATP binding cassette subfamily B member 1 (ABCB1) gene and opioid response has attracted intense attention recently. As the ABCB1 gene encodes for the transporter P-glycoprotein in the brain and intestine involved in the pharmacokinetics of opioids, we investigated the effects of ABCB1 genetic polymorphisms on doses of opioids for pain relief and determined which pharmacokinetic process was affected in cancer pain patients. Sixty-eight cancer pain patients admitted for intrathecal therapy (ITT) were included. The association between ABCB1 genetic polymorphisms (C3435T, C1236T, G2677T/A and A61G) and systemic doses of opioids before ITT were investigated. Concentrations of oxycodone in plasma and cerebrospinal fluid (CSF) were determined by HPLC-MS/MS in 17 patients treated with oral oxycodone before ITT, and the influences of ABCB1 genetic polymorphisms on plasma-concentration to oral-dose ratios and CSF-concentration to plasma-concentration ratios of oral oxycodone were further analyzed. ABCB1 C3435T and G2677T/A polymorphisms were significantly associated with systemic doses of opioids before ITT, which coincided with the influences of ABCB1 C3435T and G2677T/A polymorphisms on the ratios of plasma-concentration to oral-dose. However, no significant difference was found in ratios of CSF-concentration to plasma-concentration among ABCB1 SNP genotypes. The present study provided the first evidence that ABCB1 C3435T and G2677T/A polymorphisms affect opioid requirement in cancer pain patients via altering transportation function of P-glycoprotein in the intestine, which will further expand our knowledge about pharmacokinetics of opioids and could contribute to the individualization of opioids use.
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Subfamilia B de Transportador de Casetes de Unión a ATP , Analgésicos Opioides , Oxicodona , Polimorfismo de Nucleótido Simple , Humanos , Subfamilia B de Transportador de Casetes de Unión a ATP/genética , Subfamilia B de Transportador de Casetes de Unión a ATP/metabolismo , Masculino , Femenino , Analgésicos Opioides/farmacocinética , Analgésicos Opioides/administración & dosificación , Persona de Mediana Edad , Polimorfismo de Nucleótido Simple/genética , Anciano , Oxicodona/farmacocinética , Oxicodona/administración & dosificación , Dolor en Cáncer/tratamiento farmacológico , Dolor en Cáncer/genética , Adulto , Miembro 1 de la Subfamilia B de Casetes de Unión a ATP/genética , Miembro 1 de la Subfamilia B de Casetes de Unión a ATP/metabolismo , Mucosa Intestinal/metabolismo , GenotipoRESUMEN
Anthracycline chemotherapy is associated with the left ventricular (LV) dysfunction, but the conventional echocardiographic parameter is insensitive in detecting subclinical cardiac dysfunction, and the role of echocardiography in children cancer survivors (CCSs) has not been well established. Here, the myocardial work (MW) was employed to evaluate the early effect of the anthracyclines on LV function in children lymphoma survivors, as well as to explore the clinical application value of this modality. 51 children lymphoma survivors treated with anthracyclines were included. During the treatments, the echocardiography was performed at baseline (T0 phase), the 3rd (T1 phase) and 6th (T2 phase) chemotherapeutic cycle, respectively. After that, the conventional echocardiographic parameters, LV global longitudinal strain (GLS), and global myocardial work (GMW) parameters were obtained. Finally, these echocardiographic parameters were compared to distinguish the differences among three groups, and correlation analysis was used to identify relationship between GMW parameters and LV GLS. Compared with the baseline, we found that there are no significant differences for LVEF and other conventional echocardiographic parameters after chemotherapy, but the value of LV lateral E/E' increased at T1 and T2 group. The GLS, global work index, global constructed work, and global work efficiency were decreased, while the global wasted work was increased after chemotherapy (all P < 0.05). The correlation analysis showed that the GLS has significant correlation with GMW parameters (all P < 0.001). The MW, as a new noninvasive echocardiography modality, could be used to quantitatively evaluate the LV MW in children lymphoma survivors treated with anthracyclines, which providing a sensitive method to early detect the children's LV dysfunction after the chemotherapy.
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AIMS: The increasing prevalence of inflammatory bowel disease is emerging as a significant global healthcare concern due to its recurrent episodes of intestinal inflammation. This study aims to explore the relationship between fear of progression and health-related quality of life in inflammatory bowel disease patients, investigating the sequential mediating roles of health literacy and self-care. DESIGN: A cross-sectional study. METHODS: Eligible participants diagnosed with inflammatory bowel disease were recruited through convenience sampling method at a tertiary hospital in Shenyang, China, between May 2022 and May 2023. A total of 241 participants completed the questionnaires regarding fear of progression, health literacy, self-care and quality of life. Data analysis was conducted using SPSS 25.0 and PROCESS plug-ins. RESULTS: (1) Fear of progression was found to be negatively associated with quality of life and had a directly predictive effect on quality of life. (2) Health literacy and self-care could independently mediate the relationship between fear of progression and quality of life. (3) There was a significant chain mediating effect of health literacy and self-care in the relationship between fear of progression and quality of life. CONCLUSION: Fear of progression could not only directly predict the quality of life in inflammatory bowel disease patients but also indirectly affect their quality of life through the chain mediation of health literacy and self-care. IMPACT: This study highlights the importance of nursing staff focusing on the interplay between fear of progression, health literacy, self-care and quality of life in caring for inflammatory bowel disease patients. Understanding the potential correlation mechanism underlying quality of life may help develop targeted care interventions to synergistically enhance health literacy and self-care in these patients. REPORTING METHOD: STROBE guidelines. PATIENT OR PUBLIC CONTRIBUTION: No public or patient contribution.
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Precise control over how and where actin filaments are created leads to the construction of unique cytoskeletal arrays within a common cytoplasm. Actin filament nucleators are key players in this activity and include the conserved actin-related protein 2/3 (Arp2/3) complex as well as a large family of formins. In some eukaryotic cells, these nucleators compete for a common pool of actin monomers and loss of one favors the activity of the other. To test whether this mechanism is conserved, we combined the ability to image single filament dynamics in the homeostatic cortical actin array of living Arabidopsis (Arabidopsis thaliana) epidermal cells with genetic and/or small molecule inhibitor approaches to stably or acutely disrupt nucleator activity. We found that Arp2/3 mutants or acute CK-666 treatment markedly reduced the frequency of side-branched nucleation events as well as overall actin filament abundance. We also confirmed that plant formins contribute to side-branched filament nucleation in vivo. Surprisingly, simultaneous inhibition of both classes of nucleator increased overall actin filament abundance and enhanced the frequency of de novo nucleation events by an unknown mechanism. Collectively, our findings suggest that multiple actin nucleation mechanisms cooperate to generate and maintain the homeostatic cortical array of plant epidermal cells.
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Actinas , Arabidopsis , Actinas/metabolismo , Arabidopsis/genética , Arabidopsis/metabolismo , Forminas/metabolismo , Complejo 2-3 Proteico Relacionado con la Actina/genética , Complejo 2-3 Proteico Relacionado con la Actina/metabolismo , Citoesqueleto de Actina/metabolismo , Células Epidérmicas/metabolismoRESUMEN
Nonspecific amplification is a serious issue in DNA detection as it can lead to false-positive results and reduce specificity. It is very important to well understand its mechanism through sequencing nonspecific products. Here, an approach is developed using a nanopore sequencing technique after acquiring the long repetitive sequence of DNA products from nonspecific amplification. Based on the sequencing results, a new mechanism of nonspecific amplification designated as dynamic mismatched primer binding (DMPB) with the background DNA (bgDNA) is proposed. Unexpectedly, our findings show that the primers (â¼20 nt) can bind to bgDNA for primer extension when only 6-11 fully matched (9-14 mismatched) base pairs are formed. After the single-stranded DNAs (ssDNAs) attached to the first primer are produced, more interestingly, with the aid of DNA polymerase, the other primer can bind to these ssDNAs in the case that the fully matched base pairs formed between them are even shorter than 6 bp. As a result, perfect "seeds" for polymerase chain reaction with information on both primers are produced so that exponential nonspecific amplification can occur. The DMPB mechanism can explain nonspecific amplification in other approaches as well. Finally, a mini-hairpin DNA is used to effectively inhibit nonspecific amplification by preventing the formation of an unexpected primer-bgDNA complex.
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ADN Polimerasa Dirigida por ADN , ADN , ADN/genética , Reacción en Cadena de la Polimerasa/métodos , Cartilla de ADN , Secuencias Repetitivas de Ácidos Nucleicos , ADN de Cadena Simple , Técnicas de Amplificación de Ácido Nucleico/métodosRESUMEN
OBJECTIVE: To investigate rectal sensitivity and associated factors in patients with different subtypes of functional defecation disorder (FDD). METHODS: We segregated individuals diagnosed with FDD into two groups based on their defecation patterns: those with dyssynergic defecation and those with inadequate defecatory propulsion. We gathered general information through questionnaires and assessed rectal sensitivity using anorectal manometry. The rectal sensitivity performances of the two groups were compared; the factors related to rectal sensitivity were analyzed to determine the factors associated with rectal sensitivity, and the effect of biofeedback therapy on rectal sensitivity was clarified. RESULTS: Rectal sensitivity in different subtypes of FDD decreased, and the difference between the two groups was not statistically significant ( P â >â 0.05). There were no statistically significant differences in the first constant sensation volume, defecatory desire volume, and maximum tolerable volume between the different subtypes of FDD ( P â >â 0.05). Multi-factor binary logistic regression analysis showed that age, constipation symptom score, and diabetes were all independent risk factors for decreased rectal sensitivity ( P â <â 0.05). There were no statistically significant differences between the prior- and post-biofeedback therapy in the first constant sensation volume, defecatory desire volume, and maximum tolerable volume ( P â >â 0.05). CONCLUSION: Rectal sensitivity in different subtypes of FDD decreased. Age, constipation symptom score, and diabetes were independent risk factors for decreased rectal sensitivity. Short-term biofeedback therapy did not improve rectal hyposensitivity in patients with FDD.
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Defecación , Diabetes Mellitus , Humanos , Canal Anal , Manometría/efectos adversos , Recto , Estreñimiento/diagnóstico , Estreñimiento/terapiaRESUMEN
BACKGROUND: Adenomyoma of the small intestine is rare in children and the clinical characteristics is not clear. The study was to document the clinical characteristics and treatment of children with adenomyoma of the small intestine. METHODS: A retrospective study was conducted in children with intestinal adenomyoma from 2010 to 2022. We recorded age, gender, symptoms, location, tumour size and treatment options. RESULTS: Thirteen patients with adenomyoma of the small bowel were included. The median age was 20 months with a male-to-female ratio of 10:3 and more than half of the patients were younger than 2 years old. The mean tumour size was 2.0 cm. The lesion was found accidentally in one patient, and the others presented with symptoms of intussusception. A pathological lead point was found on ultrasound in seven patients. All tumours were located in the ileum, ranging from 24 to 260 cm proximal to the ileocecal valve. The tumour was found in an antimesenteric site in eight patients. Three patients suffered intestinal necrosis, and segmental resection of the ileum was performed. Three patients without intestinal necrosis underwent tumour rection, while intestinal resection and anastomosis were performed in the remaining seven. All patients recovered well except one, who developed intussusception 7 days after surgery; that patient underwent surgery and recovered uneventfully. CONCLUSIONS: Adenomyoma of the small intestine has a male predominance in children and intussusception is a common presentation. The ultrasound feature is a mass of mixed echogenicity containing several small cystic areas. Surgery is the primary treatment option and the procedure should be chosen based on intraoperative findings.
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Adenomioma , Enfermedades Intestinales , Intususcepción , Humanos , Masculino , Niño , Femenino , Lactante , Preescolar , Intususcepción/diagnóstico por imagen , Intususcepción/etiología , Estudios Retrospectivos , Adenomioma/diagnóstico , Adenomioma/patología , Adenomioma/cirugía , Centros de Atención Terciaria , Intestino Delgado/diagnóstico por imagen , Intestino Delgado/cirugía , Intestino Delgado/patología , NecrosisRESUMEN
Purpose: Few studies have explored factors that may account for potential mechanisms between perceived coronavirus disease 2019 (COVID-19) stress and online aggression. The current study examined a moderated mediation model with anxiety as a mediator and perceived anonymity as a moderator. Methods: A cross-sectional study was conducted. 3,069 participants across China completed scales assessing perceived COVID-19 stress, anxiety, online aggression, and perceived anonymity. Results: Perceived COVID-19 stress was positively related to online aggression. The association between perceived COVID-19 stress and online aggression was mediated by anxiety. Besides, the relationship between perceived COVID-19 stress and online aggression, as well as the relationship between anxiety and online aggression were moderated by perceived anonymity. Conclusion: This study explains the possible potential mechanisms for reducing online aggression in the context of COVID-19. In order to intervene in online aggression, psychological strategies are supposed to be drawn to reduce anxiety and perceived anonymity.
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Few studies have examined the sex differences in left ventricle (LV) structure and physiology from early life stages. We aimed to assess the role of sex and overweight/obesity on left ventricular mass (LVM) and LV volume in Chinese children without preexisting cardiovascular risk factors. We selected 934 healthy children aged 6-8 years from an existing cohort in Beijing, China. Linear regression models were used to regress body mass index (BMI), fat mass, systolic blood pressure, diastolic blood pressure, waist circumference, and visceral fat area (VFA) with LVM, left ventricle end-diastolic volume (LVEDV) and end-systolic volume (LVESV). Higher BMI, fat mass, waist circumference, VFA, and stroke volume (SV) predicted higher LVM, LVEDV, and LVESV in both sexes. Multivariable analysis showed that boys with an elevated BMI had greater LV hypertrophy. LVEDV and LVESV were higher among boys than among girls and increased with higher BMI in both boys and girls. LVEDV and LVESV were associated with VFA in boys. We observed sex differences in LVM, LVESV, and LVEDV among prepubertal children, independent of obesity, with higher values observed in boys. Sex differences in cardiac structure in children may help explain the higher incidence of cardiovascular disease in male adults. Whether interventions to reduce childhood obesity can improve the trajectory of cardiac dynamics is worth investigating.
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Obesidad Infantil , Caracteres Sexuales , Adulto , Humanos , Masculino , Niño , Femenino , Índice de Masa Corporal , Estudios Transversales , Obesidad Infantil/epidemiología , Obesidad Infantil/complicaciones , Hipertrofia Ventricular Izquierda/etiología , China/epidemiología , Función Ventricular Izquierda/fisiologíaRESUMEN
The microtubule (MT) network is a highly dynamic subcellular structure playing an important role in the growth and development of plants, and it is able to respond to biotic and abiotic environmental signals. Recent literature shows that microtubules play a key role in the tolerance of plants to salt stress. For example, salt stress induces microtubules to undergo a process of depolymerization-repolymerization, which is necessary for Arabidopsis seedlings to survive under these conditions. However, the potential cellular and molecular mechanisms still need to be further studied. Here, we describe the protocol for salt treatment of Arabidopsis seedlings and imaging the MT array by confocal laser scanning microscopy. We also introduce the AnalyzeSkeleton (2D/3D) plugin for quantitative analysis of the microtubule array after salt stress. The application of such an image processing method can rapidly develop an appreciation of the role of microtubules in the salt stress response of plants.
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Proteínas de Arabidopsis , Arabidopsis , Arabidopsis/genética , Proteínas de Arabidopsis/metabolismo , Microtúbulos/metabolismo , Estrés Salino , Plantones/metabolismo , Plantas Modificadas Genéticamente/metabolismo , Regulación de la Expresión Génica de las PlantasRESUMEN
Purpose: Pharmacists are key members of the pain management interdisciplinary team in many developed countries. However, the implementation of clinical pharmacy services in pain management is impeded by the imbalance between the pain physicians and clinical pharmacists specializing in pain management in China. The purpose of this study was to elucidate the perceptions, expectations and current experience of Chinese pain physicians regarding clinical pharmacy services. Patients and Methods: An anonymous, self-administered questionnaire was designed according to previously published studies with minor modifications and distributed online to 1100 pain physicians selected randomly in hospitals across all 31 provinces of mainland China in 2021. Data were analyzed using descriptive and inferential statistics. Results: A total of 1071 valid questionnaires were included for analysis. The pain physicians were from all 31 provinces of mainland China and most of them were from tertiary hospitals holding an undergraduate degree. Among listed kinds of clinical pharmacy services, pain physicians were less comfortable with pharmacists treating minor illnesses (p < 0.001). Pain physicians' experiences with clinical pharmacy services were far less than their expectations (p < 0.001), which is in line with the results that most of pain physicians (65.9%) interacted with pharmacists at a frequency of less than once a week. Significant differences in the experiences were found among ages (p < 0.01) and among years of work experience (p < 0.05) of pain physicians. Pain physicians' expectations of pharmacists were positively correlated with their experiences with clinical pharmacy services (p < 0.001). Conclusion: Pain physicians in China had positive perceptions and high expectations, but relatively low experiences regarding clinical pharmacy services. Expanding clinical pharmacist pain management credentialing and increasing pain physicians' exposure to clinical pharmacy services are favourable to support the interdisciplinary collaboration in pain management in China.
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One of the strategies that plants adopt to cope with an unfavorable environment is to sacrifice their growth for tolerance. Although moderate salt stress can induce root growth inhibition, the molecular mechanisms regulating this process have yet to be elucidated. Here, we found that overexpression of a zinc finger-homeodomain family transcription factor, HOMEOBOX PROTEIN 24 (HB24), led to longer primary roots than in the wild-type in the presence of 125 mM NaCl, whereas this phenotype was reversed for the hb24 loss-of-function mutant, indicating a negative impact of HB24 on salt-induced root growth inhibition. We then found that salt stress triggered the degradation of HB24 via the ubiquitin-proteasome pathway, as mediated by a plant U-box type E3 ubiquitin ligase 30 (PUB30) that directly targets HB24. We verified that HB24 is able to directly bind to the promoters of Sugars Will Eventually be Exported Transporter 11/12 (SWEET11/12) to regulate their expression in roots. Through genetic and biochemical assays, we further demonstrated that the HB24-SWEET11 module plays a negative role in salt-induced root growth inhibition. Therefore, we propose that under salt stress, PUB30 mediates HB24's degradation, thereby downregulating the expression of SWEET11, resulting in reduced sucrose supply and root growth inhibition.
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Proteínas de Arabidopsis , Arabidopsis , Raíces de Plantas , Estrés Salino , Sacarosa , Arabidopsis/genética , Arabidopsis/metabolismo , Proteínas de Arabidopsis/genética , Proteínas de Arabidopsis/metabolismo , Regulación hacia Abajo/genética , Regulación hacia Abajo/fisiología , Regulación de la Expresión Génica de las Plantas , Proteínas de Homeodominio/genética , Proteínas de Homeodominio/metabolismo , Proteínas de Transporte de Membrana/metabolismo , Raíces de Plantas/genética , Raíces de Plantas/crecimiento & desarrollo , Raíces de Plantas/metabolismo , Plantas Modificadas Genéticamente/metabolismo , Estrés Salino/genética , Estrés Salino/fisiología , Estrés Fisiológico/genética , Sacarosa/metabolismo , Ubiquitina-Proteína Ligasas/metabolismoRESUMEN
INTRODUCTION: Intrathecal therapy (ITT) via an implanted system was demonstrated for the treatment of refractory cancer pain for decades. Recently, the dissemination of ITT is enhanced in an external system way in Asia for a lower implantation cost. This study compares the efficacy, safety, and cost of the two ITT systems in refractory cancer pain patients in China. METHODS: One hundred and thirty-nine cancer pain patients who underwent implantation of the ITT system were included. One hundred and three patients received ITT via the external system (external group), while 36 patients received ITT via the implanted system (implanted group). A 1:2 propensity score matching procedure was used to yield a total of 89 patients for the final analysis. Medical records of included patients were retrospectively reviewed and pain scores, incidences of complications, and costs were compared. RESULTS: ITT via the external system provided pain relief as potent as ITT via the implanted system but was less time-consuming in the implantation phase (13 vs. 19 days, p < .01). Nausea/vomiting and urinary retention were the most frequent adverse events in both external and implanted groups (32.14%, 16.07% vs. 36.36%, 21.21%). No significant difference was found in the incidences of all kinds of complications. Compared to the implanted group, the external group cost less for the initial implantation (7268 vs. 26,275 US dollar [USD], p < .001) but had a significant higher maintenance cost (606.62 vs. 20.23 USD calculated monthly, p < .001). CONCLUSIONS: ITT via the external system is as effective and safe as that via the implanted system and has the advantage of being cheap in the upfront implantation but costs more during the maintenance process in China.
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Dolor en Cáncer , Neoplasias , Dolor Intratable , Humanos , Estudios Retrospectivos , Dolor en Cáncer/tratamiento farmacológico , Inyecciones Espinales/efectos adversos , Dolor Intratable/tratamiento farmacológico , Dolor Intratable/etiología , Manejo del Dolor/efectos adversos , Manejo del Dolor/métodos , Neoplasias/complicacionesRESUMEN
Abernethy malformation, also known as congenital extrahepatic shunt, is a rare anomaly, which is characterized by partial or complete diversion of the portal blood into the systemic venous circulation. The clinical manifestations of Abernethy malformation during childhood include neonatal cholestasis, failure to thrive, mental retardation, and other congenital defects. We report a case of Abernethy malformation Type II in a 9-year-old boy, whose left ventricle was slightly enlarged because of several major aortopulmonary collateral arteries (MAPCAs) but laboratory examinations were normal 5 years earlier. The characteristics of congenital heart disease in patients with Abernethy malformation are discussed. We propose that physicians should be aware of the possibility of Abernethy malformation in children with enlargement of the left ventricular due to systemic-pulmonary collateral circulation.
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Cardiopatías Congénitas , Malformaciones Vasculares , Masculino , Niño , Humanos , Recién Nacido , Vena Porta/anomalías , Malformaciones Vasculares/diagnóstico , Malformaciones Vasculares/diagnóstico por imagen , Cardiopatías Congénitas/complicaciones , Cardiopatías Congénitas/diagnóstico por imagenRESUMEN
BACKGROUND: Chronic pain is a common disease; about 20% of people worldwide suffer from it. While compared with the research on the prevalence and management of chronic pain in developed countries, there is a relative lack of research in this field in China. This research aims to construct the China Pain Health Index (CPHI) to evaluate the current status of the prevalence and management of chronic pain in the Chinese population. METHODS: The dimensions and indicators of CPHI were determined through literature review, Delphi method, and analytical hierarchy process model, and the original values ââof relevant indicators were obtained by collecting multi-source data. National and sub-provincial scores of CPHI (2020) were calculated by co-directional transformation, standardization, percentage transformation of the aggregate, and weighted summation. RESULTS: The highest CPHI score in 2020 is Beijing, and the lowest is Tibet. The top five provinces are Beijing (67.64 points), Shanghai (67.04 points), Zhejiang (65.74 points), Shandong (61.16 points), and Tianjin (59.99 points). The last five provinces are Tibet (33.10 points), Ningxia (37.24 points), Guizhou (39.85 points), Xinjiang (39.92 points), and Hainan (40.38 points). The prevalence of chronic pain is severe in Heilongjiang, Chongqing, Guizhou, Sichuan, and Fujian. Guizhou, Hainan, Xinjiang, Beijing, and Guangdong display a high burden of chronic pain. The five provinces of Guangdong, Shanghai, Beijing, Jiangsu, and Zhejiang have better treatment for chronic pain, while Tibet, Qinghai, Jilin, Ningxia, and Xinjiang have a lower quality of treatment. Beijing, Shanghai, Qinghai, Guangxi, and Hunan have relatively good development of chronic pain disciplines, while Tibet, Sichuan, Inner Mongolia, Hebei, and Guizhou are relatively poor. CONCLUSION: The economically developed provinces in China have higher CPHI scores, while economically underdeveloped areas have lower scores. The current pain diagnosis and treatment situation in economically developed regions is relatively good, while that in financially underdeveloped areas is rather poor. According to the variations in the prevalence and management of chronic pain among populations in different provinces in China, it is necessary to implement chronic pain intervention measures adapted to local conditions.
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Dolor Crónico , Humanos , China/epidemiología , Prevalencia , Dolor Crónico/epidemiología , Dolor Crónico/terapiaRESUMEN
Carbon nanotubes are among the most widely used nanosystems, and stability of carbon nanotube suspensions is critical for nanotechnology and environmental science. Remaining in aqueous environment alone misses important factors that regulate colloidal stability in the presence of electrolytes. Indeed, introduction of (80-95) vol % organic solvents leads to sharp changes in suspension properties depending on the solvent. For example, the critical coagulation concentrations for a given inorganic or organic coagulating ion can change by 2 orders of magnitude when going from dimethyl sulfoxide to acetonitrile. We establish and explain these trends by Lewis acid-base interactions and show that a strong interaction extending beyond the standard theory of aggregation plays an important role.
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Nanotubos de Carbono , Suspensiones , Esterificación , Descarboxilación , Solventes , AguaRESUMEN
The rotational Doppler effect (RDE) provides an efficient way to measure rotational frequency using an optical vortex beam. Crucially, most research based on the RDE just involves a spinning object or a spinning object coupled with a longitudinal velocity along the beam propagation. We analyze the interaction mechanism between optical orbital angular momentum and a spinning object with circular procession and experimentally demonstrate simultaneous measurements of two rotational frequencies. This technique broadens application of the RDE in optical metrology and remote detection of targets with micro-motions.
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This study employed a deep learning longitudinal model, graph convolutional and recurrent neural network (graph-CNN-RNN), on a series of brain structural MRI scans for AD prognosis. It characterized whole-brain morphology via incorporating longitudinal cortical and subcortical morphology and defined a probabilistic risk for the prediction of AD as a function of age prior to clinical diagnosis. The graph-CNN-RNN model was trained on half of the Alzheimer's Disease Neuroimaging Initiative dataset (ADNI, n = 1559) and validated on the other half of the ADNI dataset and the Open Access Series of Imaging Studies-3 (OASIS-3, n = 930). Our findings demonstrated that the graph-CNN-RNN can reliably and robustly diagnose AD at the accuracy rate of 85% and above across all the time points for both datasets. The graph-CNN-RNN predicted the AD conversion from 0 to 4 years before the AD onset at â¼80% of accuracy. The AD probabilistic risk was associated with clinical traits, cognition, and amyloid burden assessed using [18F]-Florbetapir (AV45) positron emission tomography (PET) across all the time points. The graph-CNN-RNN provided the quantitative trajectory of brain morphology from prognosis to overt stages of AD. Such a deep learning tool and the AD probabilistic risk have great potential in clinical applications for AD prognosis.
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Enfermedad de Alzheimer , Disfunción Cognitiva , Enfermedad de Alzheimer/diagnóstico por imagen , Disfunción Cognitiva/diagnóstico por imagen , Humanos , Imagen por Resonancia Magnética/métodos , Neuroimagen/métodos , Tomografía Computarizada por Rayos XRESUMEN
We develop a deep learning framework, spatio-temporal directed acyclic graph with attention mechanisms (ST-DAG-Att), to predict cognition and disease using functional magnetic resonance imaging (fMRI). This ST-DAG-Att framework comprises of two neural networks, (1) spatio-temporal graph convolutional network (ST-graph-conv) to learn the spatial and temporal information of functional time series at multiple temporal and spatial graph scales, where the graph is represented by the brain functional network, the spatial convolution is over the space of this graph, and the temporal convolution is over the time dimension; (2) functional connectivity convolutional network (FC-conv) to learn functional connectivity features, where the functional connectivity is derived from embedded multi-scale fMRI time series and the convolutional operation is applied along both edge and node dimensions of the brain functional network. This framework also consists of an attention component, i.e., functional connectivity-based spatial attention (FC-SAtt), that generates a spatial attention map through learning the local dependency among high-level features of functional connectivity and emphasizing meaningful brain regions. Moreover, both the ST-graph-conv and FC-conv networks are designed as feed-forward models structured as directed acyclic graphs (DAGs). Our experiments employ two large-scale datasets, Adolescent Brain Cognitive Development (ABCD, n=7693) and Open Access Series of Imaging Study-3 (OASIS-3, n=1786). Our results show that the ST-DAG-Att model is generalizable from cognition prediction to age prediction. It is robust to independent samples obtained from different sites of the ABCD study. It outperforms the existing machine learning techniques, including support vector regression (SVR), elastic net's mixture with random forest, spatio-temporal graph convolution, and BrainNetCNN.
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Encéfalo , Imagen por Resonancia Magnética , Adolescente , Encéfalo/diagnóstico por imagen , Mapeo Encefálico , Humanos , Imagen por Resonancia Magnética/métodos , Redes Neurales de la Computación , Factores de TiempoRESUMEN
BACKGROUND: Limited knowledge and poor attitudes toward pain are major barriers to nursing management of cancer pain. This study investigated the effect of continuing nursing education (CNE) on the management of cancer pain. METHOD: Annual CNE was provided from 2016 to 2019, and evaluation of nursing management of cancer pain was conducted every 2 years. The effect of CNE was determined based on the evaluation results. RESULTS: After annual CNE, the participating hospitals showed significant improvement in nursing management of cancer pain. Annual CNE significantly increased subscores in all domains except the domain of initial pain assessment. In terms of hospital levels, nursing management of cancer pain was significantly improved only for tertiary A hospitals. CONCLUSION: Annual CNE significantly improved nursing management of cancer pain. [J Contin Educ Nurs. 2021;52(11):535-540.].