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1.
World J Clin Cases ; 12(25): 5706-5712, 2024 Sep 06.
Artículo en Inglés | MEDLINE | ID: mdl-39247734

RESUMEN

BACKGROUND: As the incidence of gestational diabetes mellitus (GDM) increases, its impact on cesarean sections has attracted widespread attention. Omni-directional, insulated care and detailed care are of great significance in this patient population, as they can effectively improve the quality of care in the operating room. AIM: To explore the effect of the integrated use of comprehensive thermal insulation. METHODS: Women with GDM who underwent cesarean sections at our hospital between April 2023 and February 2024 were included in this retrospective study. The participants were randomly allocated to two groups: The observation and control groups. An all-around thermal insulation nursing strategy, including preoperative, intraoperative, and postoperative temperature maintenance, was adopted. In addition, detailed nursing care measures, such as blood glucose monitoring, wound care, and psychological counseling, were implemented in the observation group. RESULTS: Comparative observation revealed that all-around thermal insulation care can effectively prevent the incidence of maternal hypothermia caused by surgery, reduce the risk of infection, and promote blood circulation. The implementation of detailed care improved maternal satisfaction and reduced the incidence of complications via the appropriate management of fluctuations in the blood glucose levels and optimization of the nursing process before and after surgery according to the patient's characteristics. CONCLUSION: The application of a combination of comprehensive thermal insulation and detailed nursing care improved the overall quality of perioperative care.

2.
Anal Chem ; 96(36): 14560-14570, 2024 Sep 10.
Artículo en Inglés | MEDLINE | ID: mdl-39197159

RESUMEN

Deep vein thrombosis (DVT) is a serious health issue that often leads to considerable morbidity and mortality. Diagnosis of DVT in a clinical setting, however, presents considerable challenges. The fusion of metabolomics techniques and machine learning methods has led to high diagnostic and prognostic accuracy for various pathological conditions. This study explored the synergistic potential of dual-platform metabolomics (specifically, gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS)) to expand the detection of metabolites and improve the precision of DVT diagnosis. Sixty-one differential metabolites were identified in serum from DVT patients: 22 from GC-MS and 39 from LC-MS. Among these, five key metabolites were highlighted by SHapley Additive exPlanations (SHAP)-guided feature engineering and then used to develop a stacking diagnostic model. Additionally, a user-friendly interface application system was developed to streamline and automate the application of the diagnostic model, enhancing its practicality and accessibility for clinical use. This work showed that the integration of dual-platform metabolomics with a stacking machine learning model enables faster and more accurate diagnosis of DVT in clinical environments.


Asunto(s)
Aprendizaje Automático , Metabolómica , Trombosis de la Vena , Humanos , Trombosis de la Vena/diagnóstico , Trombosis de la Vena/metabolismo , Trombosis de la Vena/sangre , Metabolómica/métodos , Cromatografía de Gases y Espectrometría de Masas , Cromatografía Liquida , Masculino , Persona de Mediana Edad , Femenino
3.
Int J Oncol ; 65(4)2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39155873

RESUMEN

Following the publication of the above article, a concerned reader drew to the authors' attention that, among Figs. 1D, 2A and 4B, certain of the control western blots had been re­used in different blots. The authors have retrieved and re­examined their original data, and were able to identify the correct control western blots where the data had been inadvertently duplicated in the affected original figures. The revised versions of Figs. 2 and 4, now featuring the correct control western blots, are shown in the subsequent two pages. The authors regret that the data in question featured in the original article had been re­used, and thank the Editor of International Journal of Oncology for granting them the opportunity to publish this corrigendum. All the authors agree with the publication of this corrigendum; furthermore, they apologize to the readership of the journal for any inconvenience caused. [International Journal of Oncology 46: 1205­1213, 2015; DOI: 10.3892/ijo.2014.2800].

4.
ACS Appl Mater Interfaces ; 16(24): 31348-31362, 2024 Jun 19.
Artículo en Inglés | MEDLINE | ID: mdl-38833382

RESUMEN

Today's computing systems, to meet the enormous demands of information processing, have driven the development of brain-inspired neuromorphic systems. However, there are relatively few optoelectronic devices in most brain-inspired neuromorphic systems that can simultaneously regulate the conductivity through both optical and electrical signals. In this work, the Au/MXene/Y:HfO2/FTO ferroelectric memristor as an optoelectronic artificial synaptic device exhibited both digital and analog resistance switching (RS) behaviors under different voltages with a good switching ratio (>103). Under optoelectronic conditions, optimal weight update parameters and an enhanced algorithm achieved 97.1% recognition accuracy in convolutional neural networks. A new logic gate circuit specifically designed for optoelectronic inputs was established. Furthermore, the device integrates the impact of relative humidity to develop an innovative three-person voting mechanism with a veto power. These results provide a feasible approach for integrating optoelectronic artificial synapses with logic-based computing devices.

5.
Ecotoxicol Environ Saf ; 280: 116545, 2024 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-38850709

RESUMEN

Isoprenoid metabolism and its derivatives took part in photosynthesis, growth regulation, signal transduction, and plant defense to biotic and abiotic stresses. However, how aluminum (Al) stress affects the isoprenoid metabolism and whether isoprenoid metabolism plays a vital role in the Citrus plants in coping with Al stress remain unclear. In this study, we reported that Al-treatment-induced alternation in the volatilization rate of monoterpenes (α-pinene, ß-pinene, limonene, α-terpinene, γ-terpinene and 3-carene) and isoprene were different between Citrus sinensis (Al-tolerant) and C. grandis (Al-sensitive) leaves. The Al-induced decrease of CO2 assimilation, maximum quantum yield of primary PSII photochemistry (Fv/Fm), the lower contents of glucose and starch, and the lowered activities of enzymes involved in the mevalonic acid (MVA) pathway and 2-C-methyl-D-erythritol 4-phosphate (MEP) pathway might account for the different volatilization rate of isoprenoids. Furthermore, the altered transcript levels of genes related to isoprenoid precursors and/or derivatives metabolism, such as geranyl diphosphate (GPP) synthase (GPPS) in GPP biosynthesis, geranylgeranyl diphosphate synthase (GGPPS), chlorophyll synthase (CHS) and GGPP reductase (GGPPR) in chlorophyll biosynthesis, limonene synthase (LS) and α-pinene synthase (APS) in limonene and α-pinene synthesis, respectively, might be responsible for the different contents of corresponding products in C. grandis and C. sinensis. Our data suggested that isoprenoid metabolism was involved in Al tolerance response in Citrus, and the alternation of some branches of isoprenoid metabolism could confer different Al-tolerance to Citrus species.


Asunto(s)
Aluminio , Monoterpenos Bicíclicos , Citrus , Limoneno , Fotosíntesis , Hojas de la Planta , Terpenos , Aluminio/toxicidad , Terpenos/metabolismo , Citrus/metabolismo , Citrus/efectos de los fármacos , Limoneno/metabolismo , Fotosíntesis/efectos de los fármacos , Monoterpenos Bicíclicos/metabolismo , Hojas de la Planta/metabolismo , Hojas de la Planta/efectos de los fármacos , Estrés Fisiológico/efectos de los fármacos , Monoterpenos/metabolismo , Hemiterpenos/metabolismo , Ciclohexenos/metabolismo , Fosfatos de Azúcar/metabolismo , Butadienos/metabolismo , Eritritol/análogos & derivados , Eritritol/metabolismo , Ácido Mevalónico/metabolismo , Monoterpenos Ciclohexánicos , Citrus sinensis/metabolismo , Citrus sinensis/efectos de los fármacos , Citrus sinensis/genética , Clorofila/metabolismo , Transferasas Alquil y Aril/metabolismo , Transferasas Alquil y Aril/genética , Volatilización
6.
Life Sci ; 352: 122866, 2024 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-38936605

RESUMEN

Chronic kidney disease (CKD) represents a significant and escalating global health challenge, with morbidity and mortality rates rising steadily. Evidence increasingly implicates perirenal adipose tissue (PRAT) deposition as a contributing factor in the pathogenesis of CKD. This review explores how PRAT deposition may exert deleterious effects on renal structure and function. The anatomical proximity of PRAT to the kidneys not only potentially causes mechanical compression but also leads to the dysregulated secretion of adipokines and inflammatory mediators, such as adiponectin, leptin, visfatin, tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6), and exosomes. Additionally, PRAT deposition may contribute to renal lipotoxicity through elevated levels of free fatty acids (FFA), triglycerides (TAG), diacylglycerol (DAG), and ceramides (Cer). PRAT deposition is also linked to the hyperactivation of the renin-angiotensin-aldosterone system (RAAS), which further exacerbates CKD progression. Recognizing PRAT deposition as an independent risk factor for CKD underscores the potential of targeting PRAT as a novel strategy for the prevention and management of CKD. This review further discusses interventions that could include measuring PRAT thickness to establish a baseline, managing metabolic risk factors that promote its deposition, and inhibiting key PRAT-induced signaling pathways.


Asunto(s)
Tejido Adiposo , Progresión de la Enfermedad , Insuficiencia Renal Crónica , Sistema Renina-Angiotensina , Humanos , Insuficiencia Renal Crónica/metabolismo , Insuficiencia Renal Crónica/patología , Tejido Adiposo/metabolismo , Tejido Adiposo/patología , Sistema Renina-Angiotensina/fisiología , Riñón/metabolismo , Riñón/patología , Animales , Adipoquinas/metabolismo
7.
Nat Cell Biol ; 26(6): 991-1002, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38866970

RESUMEN

The contribution of three-dimensional genome organization to physiological ageing is not well known. Here we show that large-scale chromatin reorganization distinguishes young and old bone marrow progenitor (pro-) B cells. These changes result in increased interactions at the compartment level and reduced interactions within topologically associated domains (TADs). The gene encoding Ebf1, a key B cell regulator, switches from compartment A to B with age. Genetically reducing Ebf1 recapitulates some features of old pro-B cells. TADs that are most reduced with age contain genes important for B cell development, including the immunoglobulin heavy chain (Igh) locus. Weaker intra-TAD interactions at Igh correlate with altered variable (V), diversity (D) and joining (J) gene recombination. Our observations implicate three-dimensional chromatin reorganization as a major driver of pro-B cell phenotypes that impair B lymphopoiesis with age.


Asunto(s)
Envejecimiento , Linfocitos B , Ensamble y Desensamble de Cromatina , Cadenas Pesadas de Inmunoglobulina , Linfopoyesis , Animales , Envejecimiento/genética , Envejecimiento/metabolismo , Linfocitos B/metabolismo , Linfopoyesis/genética , Cadenas Pesadas de Inmunoglobulina/genética , Cadenas Pesadas de Inmunoglobulina/metabolismo , Transactivadores/metabolismo , Transactivadores/genética , Cromatina/metabolismo , Cromatina/genética , Células Precursoras de Linfocitos B/metabolismo , Células Precursoras de Linfocitos B/citología , Células Precursoras de Linfocitos B/inmunología , Ratones Endogámicos C57BL , Ratones , Diferenciación Celular , Ratones Noqueados
8.
Am J Physiol Endocrinol Metab ; 327(1): E134-E144, 2024 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-38747899

RESUMEN

Perigonadal adipose tissue is a homogeneous white adipose tissue (WAT) in adult male mice without any brown adipose tissue (BAT). However, there are congenital differences in the gonads between male and female mice. Whether heterogeneity existed in perigonadal adipose tissues (ATs) in female mice remains unknown. This study reported a perigonadal brown-like AT located between abdominal lymph nodes and the uterine cervix in female mice, termed lymph node-cervical adipose tissue (LNCAT). Its counterpart, lymph node-prostatic adipose tissue (LNPAT), exhibited white phenotype in adult virgin male mice. When exposed to cold, LNCAT/LNPAT increased uncoupling protein 1 (UCP1) expression via activation of tyrosine hydroxylase (TH), in which abdominal lymph nodes were involved. Interestingly, the UCP1 expression in LNCAT/LNPAT varied under different reproductive stages. The UCP1 expression in LNCAT was upregulated at early pregnancy, declined at midlate pregnancy, and reverted in weaning dams. Mating behavior stimulated LNPAT browning in male mice. We found that androgen but not estrogen or progesterone inhibited UCP1 expression in LNCAT. Androgen administration reversed the castration-induced LNPAT browning. Our results identified a perigonadal brown-like AT in female mice and characterized its UCP1 expression patterns under various conditions.NEW & NOTEWORTHY A novel perigonadal brown-like AT (LNCAT) of female mice was identified. Abdominal lymph nodes were involved in cold-induced browning in this newly discovered adipose tissue. The UCP1 expression in LNCAT/LNPAT was also related to ages, sexes, and reproductive stages, in which androgen acted as an inhibitor role.


Asunto(s)
Tejido Adiposo Pardo , Cuello del Útero , Ganglios Linfáticos , Próstata , Proteína Desacopladora 1 , Animales , Masculino , Femenino , Ratones , Ganglios Linfáticos/metabolismo , Proteína Desacopladora 1/metabolismo , Proteína Desacopladora 1/genética , Tejido Adiposo Pardo/metabolismo , Cuello del Útero/metabolismo , Próstata/metabolismo , Embarazo , Tejido Adiposo Blanco/metabolismo , Ratones Endogámicos C57BL , Tejido Adiposo/metabolismo , Andrógenos/farmacología , Andrógenos/metabolismo , Conducta Sexual Animal/fisiología
9.
Mater Horiz ; 11(12): 2886-2897, 2024 Jun 17.
Artículo en Inglés | MEDLINE | ID: mdl-38563639

RESUMEN

Neuromorphic computing, which mimics biological neural networks, is widely regarded as the optimal solution for addressing the limitations of traditional von Neumann computing architecture. In this work, an adjustable multistage resistance switching ferroelectric Bi2FeCrO6 diode artificial synaptic device was fabricated using a sol-gel method with a simple process. The device exhibits nonlinearity in its electrical characteristics, demonstrating tunable multistage resistance switching behavior and a strong ferroelectric diode effect through the manipulation of ferroelectric polarization. One of its salient advantages resides in its capacity to dynamically regulate its polarization state in response to an external electric field, thereby facilitating the fine-tuning of synaptic connection strength while maintaining synaptic stability. The device is capable of accurately simulating the fundamental properties of biological synapses, including long/short-term plasticity, paired-pulse facilitation, and spike-timing-dependent plasticity. Additionally, the device exhibits a distinctive photoelectric response and is capable of inducing synaptic plasticity by light signal activation. The utilization of a femtosecond laser for the scrutiny of carrier transport mechanisms imparts profound insights into the intricate dynamics governing the optical memory effect. Furthermore, utilizing a convolutional neural network (CNN) architecture, the recognition accuracy of the MNIST and fashion MNIST datasets was improved to 95.6% and 78%, respectively, through the implementation of improved random adaptive algorithms. These findings present a new opportunity for utilizing Bi2FeCrO6 materials in the development of artificial synapses for neuromorphic computation.

10.
Nanomaterials (Basel) ; 14(7)2024 Mar 27.
Artículo en Inglés | MEDLINE | ID: mdl-38607116

RESUMEN

Compared with purely electrical neuromorphic devices, those stimulated by optical signals have gained increasing attention due to their realistic sensory simulation. In this work, an optoelectronic neuromorphic device based on a photoelectric memristor with a Bi2FeCrO6/Al-doped ZnO (BFCO/AZO) heterostructure is fabricated that can respond to both electrical and optical signals and successfully simulate a variety of synaptic behaviors, such as STP, LTP, and PPF. In addition, the photomemory mechanism was identified by analyzing the energy band structures of AZO and BFCO. A convolutional neural network (CNN) architecture for pattern classification at the Mixed National Institute of Standards and Technology (MNIST) was used and improved the recognition accuracy of the MNIST and Fashion-MNIST datasets to 95.21% and 74.19%, respectively, by implementing an improved stochastic adaptive algorithm. These results provide a feasible approach for future implementation of optoelectronic synapses.

11.
PhytoKeys ; 241: 121-130, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38665212

RESUMEN

Carexlinanensis X.D.Qiu & X.F.Jin, a new species in sect. Mitratae of the sedge family (Cyperaceae) from north-western Zhejiang is described and illustrated. We performed a statistical comparison of the new species with other closely-related species from the same section. Carexlinanensis is similar to Carexsachalinensis F.Schmidt, but differs in having leaf blades 1-2 mm wide (vs. 2.5-3.5 mm wide), utricles longer than pistillate glumes, with beak margin smooth (vs. barbate) and peduncles of lateral spikes enclosed in bract sheaths (vs. exserted from bract sheaths).

12.
Cancer Rep (Hoboken) ; 7(3): e2050, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38517478

RESUMEN

BACKGROUND: Hepatocellular carcinoma (HCC) is widely recognized as a globally prevalent malignancy. Immunotherapy is a promising therapy for HCC patients. Increasing evidence suggests that lncRNAs are involved in HCC progression and immunotherapy. AIM: The study reveals the mechanistic role of long non-coding RNA (lncRNA) FOXD1-AS1 in regulating migration, invasion, circulating tumor cells (CTCs), epithelial-mesenchymal transition (EMT), and immune escape in HCC in vitro. METHODS: This study employed real-time PCR (RT-qPCR) to measure FOXD1-AS1, miR-615-3p, and programmed death-ligand 1 (PD-L1). The interactions of FOXD1-AS1, miR-615-3p, and PD-L1 were validated via dual-luciferase reporter gene and ribonucleoprotein immunoprecipitation (RIP) assay. In vivo experimentation involves BALB/c mice and BALB/c nude mice to investigate the impact of HCC metastasis. RESULTS: The upregulation of lncRNA FOXD1-AS1 in malignant tissues significantly correlates with poor prognosis. The investigation was implemented on the impact of lncRNA FOXD1-AS1 on the migratory, invasive, and EMT of HCC cells. It has been observed that the lncRNA FOXD1-AS1 significantly influences the generation and metastasis of MCTC in vivo analysis. In mechanistic analysis, lncRNA FOXD1-AS1 enhanced immune escape in HCC via upregulation of PD-L1, which acted as a ceRNA by sequestering miR-615-3p. Additionally, lncRNA FOXD1-AS1 was found to modulate the EMT of CTCs through the activation of the PI3K/AKT pathway. CONCLUSION: This study presents compelling evidence supporting the role of lncRNA FOXD1-AS1 as a miRNA sponge that sequesters miR-655-3p and protects PD-L1 from suppression.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , MicroARNs , ARN Largo no Codificante , Animales , Ratones , Humanos , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/terapia , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/terapia , Antígeno B7-H1/genética , Fosfatidilinositol 3-Quinasas/genética , ARN Largo no Codificante/genética , Ratones Desnudos , Línea Celular Tumoral , MicroARNs/genética , MicroARNs/metabolismo , Transición Epitelial-Mesenquimal/genética , Factores de Transcripción Forkhead/genética
13.
Fa Yi Xue Za Zhi ; 40(1): 59-63, 2024 Feb 25.
Artículo en Inglés, Chino | MEDLINE | ID: mdl-38500462

RESUMEN

Important forensic diagnostic indicators of sudden death in coronary atherosclerotic heart disease, such as acute or chronic myocardial ischemic changes, sometimes make it difficult to locate the ischemic site due to the short death process, the lack of tissue reaction time. In some cases, the deceased died of sudden death on the first-episode, resulting in difficulty for medical examiners to make an accurate diagnosis. However, clinical studies on coronary instability plaque revealed the key role of coronary spasm and thrombosis caused by their lesions in sudden coronary death process. This paper mainly summarizes the pathological characteristics of unstable coronary plaque based on clinical medical research, including plaque rupture, plaque erosion and calcified nodules, as well as the influencing factors leading to plaque instability, and briefly describes the research progress and technique of the atherosclerotic plaques, in order to improve the study on the mechanism of sudden coronary death and improve the accuracy of the forensic diagnosis of sudden coronary death by diagnosing different pathologic states of coronary atherosclerotic plaques.


Asunto(s)
Enfermedad de la Arteria Coronaria , Trombosis Coronaria , Placa Aterosclerótica , Humanos , Placa Aterosclerótica/complicaciones , Placa Aterosclerótica/patología , Trombosis Coronaria/complicaciones , Trombosis Coronaria/patología , Factores de Riesgo , Enfermedad de la Arteria Coronaria/complicaciones , Muerte Súbita Cardíaca/etiología , Muerte Súbita Cardíaca/patología , Vasos Coronarios/diagnóstico por imagen , Vasos Coronarios/patología
14.
Nat Neurosci ; 27(5): 1014-1018, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38467902

RESUMEN

Large-scale imaging of neuronal activities is crucial for understanding brain functions. However, it is challenging to analyze large-scale imaging data in real time, preventing closed-loop investigation of neural circuitry. Here we develop a real-time analysis system with a field programmable gate array-graphics processing unit design for an up to 500-megabyte-per-second image stream. Adapted to whole-brain imaging of awake larval zebrafish, the system timely extracts activity from up to 100,000 neurons and enables closed-loop perturbations of neural dynamics.


Asunto(s)
Encéfalo , Neuronas , Pez Cebra , Animales , Neuronas/fisiología , Encéfalo/fisiología , Encéfalo/diagnóstico por imagen , Procesamiento de Imagen Asistido por Computador/métodos , Larva , Neuroimagen/métodos , Sistemas de Computación
15.
Molecules ; 29(6)2024 Mar 18.
Artículo en Inglés | MEDLINE | ID: mdl-38542983

RESUMEN

The polysaccharides from Stemona tuberosa Lour, a kind of plant used in Chinese herbal medicine, have various pharmacological activities, such as anti-inflammatory and antioxidant properties. However, the effects of the extraction methods and the activity of polysaccharides from different parts are still unknown. Therefore, this study aimed to evaluate the effects of different extraction methods on the yields, chemical compositions, and bioactivity of polysaccharides extracted from different parts of Stemona tuberosa Lour. Six polysaccharides were extracted from the leaves, roots, and stems of Stemona tuberosa Lour through the use of hot water (i.e., SPS-L1, SPS-R1, and SPS-S1) and an ultrasound-assisted method (i.e., SPS-L2, SPS-R2, and SPS-S2). The results showed that the physicochemical properties, structural properties, and biological activity of the polysaccharides varied with the extraction methods and parts. SPS-R1 and SPS-R2 had higher extraction yields and total sugar contents than those of the other SPSs (SPS-L1, SPS-L2, SPS-S1, and SPS-S2). SPS-L1 had favorable antioxidant activity and the ability to downregulate MUC5AC expression. An investigation of the anti-inflammatory properties showed that SPS-R1 and SPS-R2 had greater anti-inflammatory activities, while SPS-R2 demonstrated the strongest anti-inflammatory potential. The results of this study indicated that SPS-L1 and SPS-L2, which were extracted from non-medicinal parts, may serve as potent natural antioxidants, but further study is necessary to explore their potential applications in the treatment of diseases. The positive anti-inflammatory effects of SPS-R1 and SPS-R2 in the roots may be further exploited in drugs for the treatment of inflammation.


Asunto(s)
Stemonaceae , Stemonaceae/química , Stemonaceae/metabolismo , Antioxidantes/farmacología , Antioxidantes/metabolismo , Polisacáridos/farmacología , Polisacáridos/metabolismo , Antiinflamatorios/farmacología , Antiinflamatorios/metabolismo
16.
Appl Radiat Isot ; 206: 111248, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38422940

RESUMEN

In this study, to achieve accurate measurement of radioactive noble gas and enhance the precision of efficiency calibration, a relatively low-cost and low-density simulated-gas calibration source (SGCS) was produced from polyurethane foam with a density of ρ = 0.098 g cm-3. Using SGCS with a Marinelli beaker geometry, the efficiency calibration was applied to a BE5030, 50.5% relative efficiency HPGe detector in an energy range of 59.54 keV∼1836.06 keV. Then, taking the 81 keV gamma-ray emitted by 133Xe as an example, due to the density difference between the SGCS and the 133Xe gas sample, it is necessary to correct for self-attenuation effects. Therefore, a semi-empirical function for self-attenuation correction was established by using LabSOCS software and XCOM. Upon validation, the relative deviation of efficiency calibration values between the SGCS and the LabSOCS of 133Xe under the density of 0.001 g cm-3 to 0.01 g cm-3 was about 3%. After using the self-attenuation correction method established in this study, the results verified a good consistency of the efficiency calculated by SGCS and LabSOCS software.

17.
Zhongguo Shi Yan Xue Ye Xue Za Zhi ; 32(1): 164-170, 2024 Feb.
Artículo en Chino | MEDLINE | ID: mdl-38387916

RESUMEN

OBJECTIVE: To investigate the value of immunoglobulin heavy chain (IgH) gene rearrangement in monitoring minimal residual disease (MRD) in multiple myeloma (MM) received autologous hematopoietic stem cell transplantation(auto-HSCT). METHODS: The clinical data of 26 MM patients who received auto-HSCT in the Department of Hematology, Wuhan First Hospital from 2018 to 2022 were collected. IgH rearrangement was detected by multiplex PCR combined with capillary electrophoresis fragment analysis to evaluate minimal residual disease (MRD), and the outcome of the disease was analyzed statistically. RESULTS: Among the 26 MM patients, 18 were males and 8 were females, with a median age of 59(41-70) years. The median follow-up time after transplantation was 33 (7-52) months. Compared with the IgH rearrangement negative group (n=17), the proportion of CR and sCR of patients with IgH rearrangement positive in bone marrow samples before auto-HSCT at 3 months after transplantation was lower (1/9 vs 14/17), and the duration of remission (DOR) after transplantation was shorter(10.78±4.35 vs 15.88±5.22 months), with statistically significant difference in DOR between the two groups(P < 0.05). Compared with IgH rearrangement negative group (n=21), the proportion of CR and sCR of patients with positive IgH rearrangement results from peripheral blood stem cell collection at 3 months after transplantation was lower(0/5 vs 15/21), the duration of remission (DOR) after transplantation was shorter(9.60±4.83 vs 15.19±5.11 months), and the difference in DOR between the two groups was statistically significant (P < 0.05). During the follow-up period, 5 patients (5/9) with positive IgH rearrangement results in bone marrow specimens died, and all patients with negative IgH rearrangement results survived. Four patients (4/5) with positive IgH rearrangement results by peripheral blood stem cell samples died, while one patient (1/21) with negative IgH rearrangement results died. In both bone marrow and peripheral blood stem cell samples, the survival time of IgH rearrangement-positive patients after transplantation was shorter than that of IgH rearrangement-negative patients(P < 0.05). Logistic regression analysis showed that gender, disease stage, the proportion of bone marrow smear plasma cells at initial diagnosis, stem cell mobilization plan, efficacy evaluation before transplantation (≥CR and 0.05). CONCLUSION: By detecting IgH rearrangement of MM patients receiving auto-HSCT, the depth of MRD can be further evaluated, which has a certain guiding significance for the efficacy and prognosis of the disease.


Asunto(s)
Trasplante de Células Madre Hematopoyéticas , Mieloma Múltiple , Masculino , Femenino , Humanos , Persona de Mediana Edad , Anciano , Mieloma Múltiple/genética , Mieloma Múltiple/terapia , Neoplasia Residual/diagnóstico , Trasplante Autólogo , Reordenamiento Génico
18.
Circulation ; 149(18): 1435-1456, 2024 Apr 30.
Artículo en Inglés | MEDLINE | ID: mdl-38357822

RESUMEN

BACKGROUND: A main obstacle in current valvular heart disease research is the lack of high-quality homogeneous functional heart valve cells. Human induced pluripotent stem cells (hiPSCs)-derived heart valve cells may help with this dilemma. However, there are no well-established protocols to induce hiPSCs to differentiate into functional heart valve cells, and the networks that mediate the differentiation have not been fully elucidated. METHODS: To generate heart valve cells from hiPSCs, we sequentially activated the Wnt, BMP4, VEGF (vascular endothelial growth factor), and NFATc1 signaling pathways using CHIR-99021, BMP4, VEGF-165, and forskolin, respectively. The transcriptional and functional similarity of hiPSC-derived heart valve cells compared with primary heart valve cells were characterized. Longitudinal single-cell RNA sequencing was used to uncover the trajectory, switch genes, pathways, and transcription factors of the differentiation. RESULTS: An efficient protocol was developed to induce hiPSCs to differentiate into functional hiPSC-derived valve endothelial-like cells and hiPSC-derived valve interstitial-like cells. After 6-day differentiation and CD144 magnetic bead sorting, ≈70% CD144+ cells and 30% CD144- cells were obtained. On the basis of single-cell RNA sequencing data, the CD144+ cells and CD144- cells were found to be highly similar to primary heart valve endothelial cells and primary heart valve interstitial cells in gene expression profile. Furthermore, CD144+ cells had the typical function of primary heart valve endothelial cells, including tube formation, uptake of low-density lipoprotein, generation of endothelial nitric oxide synthase, and response to shear stress. Meanwhile, CD144- cells could secret collagen and matrix metalloproteinases, and differentiate into osteogenic or adipogenic lineages like primary heart valve interstitial cells. Therefore, we identified CD144+ cells and CD144- cells as hiPSC-derived valve endothelial-like cells and hiPSC-derived valve interstitial-like cells, respectively. Using single-cell RNA sequencing analysis, we demonstrated that the trajectory of heart valve cell differentiation was consistent with embryonic valve development. We identified the main switch genes (NOTCH1, HEY1, and MEF2C), signaling pathways (TGF-ß, Wnt, and NOTCH), and transcription factors (MSX1, SP5, and MECOM) that mediated the differentiation. Finally, we found that hiPSC-derived valve interstitial-like cells might derive from hiPSC-derived valve endothelial-like cells undergoing endocardial-mesenchymal transition. CONCLUSIONS: In summary, this is the first study to report an efficient strategy to generate functional hiPSC-derived valve endothelial-like cells and hiPSC-derived valve interstitial-like cells from hiPSCs, as well as to elucidate the differentiation trajectory and transcriptional dynamics of hiPSCs differentiated into heart valve cells.


Asunto(s)
Diferenciación Celular , Válvulas Cardíacas , Células Madre Pluripotentes Inducidas , Humanos , Células Madre Pluripotentes Inducidas/citología , Células Madre Pluripotentes Inducidas/metabolismo , Válvulas Cardíacas/citología , Válvulas Cardíacas/metabolismo , Células Cultivadas , Células Endoteliales/metabolismo , Células Endoteliales/citología , Transducción de Señal
20.
Nat Med ; 30(2): 470-479, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38253798

RESUMEN

Prenatal cell-free DNA (cfDNA) screening uses extracellular fetal DNA circulating in the peripheral blood of pregnant women to detect prevalent fetal chromosomal anomalies. However, numerous severe conditions with underlying single-gene defects are not included in current prenatal cfDNA screening. In this prospective, multicenter and observational study, pregnant women at elevated risk for fetal genetic conditions were enrolled for a cfDNA screening test based on coordinative allele-aware target enrichment sequencing. This test encompasses the following three of the most frequent pathogenic genetic variations: aneuploidies, microdeletions and monogenic variants. The cfDNA screening results were compared to invasive prenatal or postnatal diagnostic test results for 1,090 qualified participants. The comprehensive cfDNA screening detected a genetic alteration in 135 pregnancies with 98.5% sensitivity and 99.3% specificity relative to standard diagnostics. Of 876 fetuses with suspected structural anomalies on ultrasound examination, comprehensive cfDNA screening identified 55 (56.1%) aneuploidies, 6 (6.1%) microdeletions and 37 (37.8%) single-gene pathogenic variants. The inclusion of targeted monogenic conditions alongside chromosomal aberrations led to a 60.7% increase (from 61 to 98) in the detection rate. Overall, these data provide preliminary evidence that a comprehensive cfDNA screening test can accurately identify fetal pathogenic variants at both the chromosome and single-gene levels in high-risk pregnancies through a noninvasive approach, which has the potential to improve prenatal evaluation of fetal risks for severe genetic conditions arising from heterogenous molecular etiologies. ClinicalTrials.gov registration: ChiCTR2100045739 .


Asunto(s)
Ácidos Nucleicos Libres de Células , Pruebas Prenatales no Invasivas , Embarazo , Humanos , Femenino , Diagnóstico Prenatal/métodos , Estudios Prospectivos , Aneuploidia , Ácidos Nucleicos Libres de Células/genética
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