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1.
Ying Yong Sheng Tai Xue Bao ; 35(9): 2322-2337, 2024 Sep 18.
Artículo en Inglés | MEDLINE | ID: mdl-39435796

RESUMEN

Increasing the carbon sink capacity of terrestrial ecosystems is a primary strategy to mitigate climate change and achieve the "carbon neutrality" goal. Clarifying the status and future dynamics of carbon sink of terrestrial ecosystems in Northeast China is crucial for achieving "carbon neutrality" as this region is a core contributor to carbon sink in China's terrestrial ecosystems. Here, we systematically summarized current research on carbon sink of terrestrial ecosystems across Northeast China, including the measurements and spatial-temporal patterns of carbon sinks, driving mechanisms of carbon sinks, the assessments of carbon sink potential, and technologies for increasing carbon sequestration. There are substantial uncertainties in quantifying terrestrial ecosystem carbon sink in Northeast China due to differences in data sources and methods, especially for forest carbon sink measurements, ranging from 0.020 to 0.157 Pg C·a-1. Carbon sink function depends on carbon exchange processes across plant-soil-atmosphere interfaces. The key pathways to enhance carbon sequestration in Northeast China under different temporal and spatial scales remains unclear. Improving terrestrial ecosystem quality is the key and core of carbon sequestration and sink enhancement. However, there is an urgent need to develop a multi-ecosystem collaborative carbon sequestration and sink enhancement technology system for the "dual carbon" goal. Future research needs to develop an accurate carbon sink measurement system that integrates multi-source data and multi-scale technologies to accurately assess the function and potential of carbon sink in Northeast China, focus on the multi-scale driving mechanism of carbon sink functions, develop new technical systems for coordinated enhancement of carbon sink for the Northeast terrestrial ecosystems, and carry out demonstrations of carbon sink enhancement technologies. These efforts will provide the scientific and technological supports for achieving the "carbon neutrality" goal.


Asunto(s)
Secuestro de Carbono , Cambio Climático , Ecosistema , China , Carbono/análisis , Carbono/metabolismo , Suelo/química , Bosques , Árboles/crecimiento & desarrollo , Árboles/metabolismo
2.
Zoolog Sci ; 41(5): 479-488, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39436009

RESUMEN

We identified two gall-inducing wasp species infesting eucalypts leaves, including an undescribed species, Ophelimus cracens sp. nov., and Epichrysocharis burwelli, which is a new record for Taiwan. The major hosts of O. cracens were Eucalyptus grandis, Eu. urophylla, and Eu. camaldulensis (Myrtaceae). We observed failed galls of O. cracens at an early stage on Eu. amplifolia and Corymbia maculata. All O. cracens adults discovered on infected leaves were females, and four parasitoid species were identified in samples collected from two cities, three counties, and four municipalities across Taiwan. Epichrysocharis burwelli was exclusively found on C. citriodora in Hsinchu, Nantou, and Tainan Cities. This marks the first record of Ep. burwelli in Asia, accompanied by the identification of one parasitoid species. The adult longevity of adults which emerged from their major hosts, when provided with honey-water solution, was 5.5 days for O. cracens and 5.7 days for Ep. burwelli. Recognizing the potential damage by these wasps on Eucalyptus production areas in the absence of parasitoids, further investigations of their biology and control are warranted.


Asunto(s)
Eucalyptus , Avispas , Animales , Avispas/fisiología , Taiwán , Eucalyptus/parasitología , Femenino , Hojas de la Planta/parasitología , Tumores de Planta/parasitología , Especies Introducidas , Especificidad de la Especie , Interacciones Huésped-Parásitos , Distribución Animal
3.
Phytochemistry ; 229: 114303, 2024 Oct 16.
Artículo en Inglés | MEDLINE | ID: mdl-39419316

RESUMEN

Eleven undescribed steroids, bipolaristeroids A-K, and one known compound, demethylincisterol A3, were isolated from the fungus Bipolaris maydis. Bipolaristeroid A is a 5,6-seco-9,10-seco-steroid with a rearranged B ring, in which the A and C rings are connected by an ester bond. Bipolaristeroid B is a rearranged 1(10 â†’ 6)-abeosteroid with an aromatic B ring. Their planar structures and absolute configuration were determined using NMR, HRESIMS, DP4+ analysis, ECD calculation, and single-crystal X-ray diffraction. Bipolaristeroid A shows excellent inhibitory effects against the cancer cell lines HepG2, A549, SW620, and C4-2B with IC50 values of 7.94, 5.11, 5.13, and 3.83 µM, respectively.

4.
Int J Ophthalmol ; 17(10): 1905-1910, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39430013

RESUMEN

AIM: To assess whether there is a possible causal link between the intake of cheese and the risk of diabetic retinopathy (DR) utilizing a two-sample Mendelian randomization (MR) analysis. METHODS: The research data were obtained from summary statistics of genome-wide association studies (GWAS). Genetic loci closely related to cheese intake were extracted as instrumental variables (IVs), and DR was the outcome variable. The data were extracted from individuals of European ethnicity. The data of cheese intake consisted of 451 486 samples with 9 851 867 single nucleotide polymorphisms (SNPs), while the DR data consisted of 206 234 samples with 16 380 446 SNPs. Sixty-one genetic loci closely related to cheese intake were selected as IVs. MR analysis was performed by inverse-variance weighted (IVW) method and MR-Egger regression respectively. The causal relationship between cheese intake and DR was evaluated using odds ratios (ORs) and 95% confidence intervals (CIs). Egger-intercept test was used to test horizontal pleiotropy and sensitivity analysis was performed by leave-one-out test. RESULTS: The P value of the IVW method was less than 0.05, indicating a significant negative correlation between cheese intake and DR. MR-Egger regression showed that the intercept was 0.01 with a standard error of 0.022, and a P-value of 0.634, indicating no evidence of horizontal pleiotropy affecting the IVs related to the exposure factors. Besides, heterogeneity tests confirmed the absence of heterogeneity, and the "leave-one-out" sensitivity analysis demonstrated that the results were stable. CONCLUSION: Cheese intake is causally negatively correlated with the occurrence of DR, and cheese intake could reduce the risk of DR.

5.
BMC Cancer ; 24(1): 1257, 2024 Oct 10.
Artículo en Inglés | MEDLINE | ID: mdl-39390375

RESUMEN

BACKGROUND: Though several nomograms have been established to predict the survival probability of patients with small-cell lung cancer (SCLC), none involved enough variables. This study aimed to construct a novel prognostic nomogram and compare its performance with other models. METHODS: Seven hundred twenty-two patients were pathologically diagnosed with SCLC in Shanxi Province Cancer Hospital, Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences, Cancer Hospital Affiliated to Shanxi Medical University from January 2016 to December 2018. We input Forty-one factors by reviewing the medical records. The nomogram was constructed based on the variables identified by univariate and multivariate analyses in the training set and validated in the validation set. Then we compared the performance of the models in terms of discrimination, calibration, and clinical net benefit. RESULTS: There were eight variables involved in the nomogram: gender, monocyte (MON), neuron-specific enolase (NSE), cytokeratin 19 fragments (Cyfra211), M stage, radiotherapy (RT), chemotherapy cycles (CT cycles), and prophylactic cranial irradiation (PCI). The calibration curve showed a good correlation between the nomogram prediction and actual observation for overall survival (OS). The area under the curve (AUC) of the nomogram was higher, and the Integrated Brier score (IBS) was lower than other models, indicating a more accurate prediction. Decision curve analysis (DCA) showed a significant improvement in the clinical net benefit compared to the other models. CONCLUSIONS: We constructed a novel nomogram to predict OS for patients with SCLC using more comprehensive and objective variables. It performed better than existing models and would assist clinicians in individually estimating risk and making a therapeutic regimen.


Asunto(s)
Neoplasias Pulmonares , Nomogramas , Carcinoma Pulmonar de Células Pequeñas , Humanos , Masculino , Femenino , Carcinoma Pulmonar de Células Pequeñas/terapia , Carcinoma Pulmonar de Células Pequeñas/mortalidad , Carcinoma Pulmonar de Células Pequeñas/patología , Persona de Mediana Edad , Neoplasias Pulmonares/terapia , Neoplasias Pulmonares/mortalidad , Neoplasias Pulmonares/patología , Anciano , Pronóstico , Adulto , Estudios Retrospectivos , Estadificación de Neoplasias , Fosfopiruvato Hidratasa/sangre
6.
Chem Commun (Camb) ; 60(84): 12213-12216, 2024 Oct 17.
Artículo en Inglés | MEDLINE | ID: mdl-39356216

RESUMEN

In this study, we present a ligand-free nickel(II)-catalyzed halogen exchange of aromatic halides with magnesium chloride. This method effectively facilitates the retro-Finkelstein reaction for a wide range of aryl bromides, iodides and triflates, demonstrating excellent functional group tolerance. Mechanistic studies reveal that magnesium plays a crucial role in the challenging reductive elimination from Ni(II) intermediates.

7.
Nat Commun ; 15(1): 8840, 2024 Oct 13.
Artículo en Inglés | MEDLINE | ID: mdl-39397031

RESUMEN

As methanol can be derived from either CO2 or methane, methanol economy can play an important role in combating climate change. In this scenario, rapid utilization of methanol by an industrial microorganism is the first and crucial step for efficient utilization of the C1 feedstock chemical. Here, we report the development of a methylotrophic E. coli strain with a doubling time of 3.5 hours under optimal conditions, comparable or faster than native model methylotrophs Methylorubrum extorquens AM1 (Td~4hr) and Bacillus methanolicus at 37°C (Td~5hr). To accomplish this, we develop a bacterial artificial chromosome (BAC) with dynamic copy number variation (CNV) to facilitate overcoming the formaldehyde-induced DNA-protein cross-linking (DPC) problem in the evolution process. We track the genome variations of 75 cultures along the evolution process by next-generation sequencing, and identified the features of the fast-growing strain. After stabilization, the final strain (SM8) grows to 20 g/L of cell mass within 77 hrs in a bioreactor. This study illustrates the potential of dynamic CNV as an evolution tool and synthetic methylotrophs as a platform for sustainable biotechnological applications.


Asunto(s)
Escherichia coli , Metanol , Metanol/metabolismo , Escherichia coli/genética , Escherichia coli/metabolismo , Escherichia coli/crecimiento & desarrollo , Cromosomas Artificiales Bacterianos/genética , Reactores Biológicos , Variaciones en el Número de Copia de ADN , Ingeniería Metabólica/métodos , Bacillus/genética , Bacillus/metabolismo , Genoma Bacteriano
8.
Front Pharmacol ; 15: 1490335, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39439892

RESUMEN

Bacterial infections and antibiotic resistance pose significant public health challenges globally. Natural products serve as valuable sources for discovering antimicrobial agents. Rhododendron simsii Planch, a folk medicine, is traditionally used to treat various inflammatory diseases. In this study, we investigated the antibacterial metabolites derived from R. simsii Planch. Rhodosimsiin A (1), bearing a 1,5-seco-1,6 and 3,6-epoxy grayanane diterpene skeleton, representing a novel 5/6/7/6/5 pentacyclic ring system, and 3ß,16α-dihydroxy-6ß-ethoxy-14ß-acetoxy-grayan-1(5)-ene-10-one (4), which represents the first example of the degradation of C-20 and carbonylation in C-10 diterpenoid, together with two new grayanane diterpenes (2-3), three new triterpenes (13-15), and known analogs (5-12, 16-30), were isolated from the leaves of R. simsii Planch by using the bioassay-guided method. Their structures were elucidated by comprehensive spectroscopic analyses, and absolute configurations were established by single-crystal X-ray diffraction and calculated ECD spectra. Compounds 14, 15, 18, 20, 27, 28, and 30 exhibited potent antibacterial activity with an MIC50 of 1.4-24.3 µg/mL against Staphylococcus aureus. The findings of this research indicate that secondary metabolites derived from R. simsii Planch are promising natural antimicrobial candidates.

9.
Front Endocrinol (Lausanne) ; 15: 1431584, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39444456

RESUMEN

Objective: The purpose of this study was to construct a diagnostic model by exploring the potential predictors of high-risk Papillary Thyroid Microcarcinoma (PTMC) and verifying its reliability. Methods: A retrospective analysis of PTMC patients who underwent surgical treatment from 2004 to 2015 in the SEER database (training set) and the clinical pathological ultrasound information of PTMC patients at the Sichuan Provincial People's Hospital from 2020 to 2022 (external validation set) was conducted. In the training set, univariate and multivariate logistic regression analyses were used to screen independent predictive factors for high-risk PTMC patients in pathology. A nomogram diagnostic model was further constructed. Additionally, ROC curves and calibration curves were drawn to evaluate the efficiency of the model. In the external validation set, the diagnostic model was indirectly evaluated based on preoperative ultrasound imaging features to explore the feasibility and reliability of diagnosing high-risk PTMC through preoperative ultrasound imaging features. Results: A total of 1628 patients were included in the training set, and 530 patients were included in the test set. The independent risk factors for pathological high-risk PTMC were sex, age, tumor maximum diameter, tumor invasive, and cervical lymph nodes (P<0.05). The C-index of the nomogram constructed based on these five factors was 0.947, with an optimal sensitivity of 96.7% and a specificity of 86.0%. The calibration curve showed that the model had high consistency. The area under the curve (AUC) value of the ROC curve for high-risk PTMC predicted by the risk score based on ultrasound features was 0.824 [95% CI (0.789, 0.860)], which was highly consistent with the risk score based on pathological features (κ= 0.758, P<0.05). Conclusion: Indirect evaluation of a high-risk PTMC diagnostic model based on preoperative ultrasound imaging features had high predictive efficiency and potential value for clinical application.


Asunto(s)
Carcinoma Papilar , Nomogramas , Neoplasias de la Tiroides , Humanos , Neoplasias de la Tiroides/patología , Neoplasias de la Tiroides/diagnóstico , Neoplasias de la Tiroides/diagnóstico por imagen , Neoplasias de la Tiroides/cirugía , Neoplasias de la Tiroides/epidemiología , Femenino , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Adulto , Carcinoma Papilar/cirugía , Carcinoma Papilar/patología , Carcinoma Papilar/diagnóstico , Carcinoma Papilar/diagnóstico por imagen , Ultrasonografía , Factores de Riesgo , Reproducibilidad de los Resultados , Curva ROC , Anciano
10.
Org Lett ; 26(42): 9005-9010, 2024 Oct 25.
Artículo en Inglés | MEDLINE | ID: mdl-39412763

RESUMEN

Herein, we report a convergent synthesis of 1-azahelicenes using easily available quinoline derivatives and cyclic diaryliodonium salts as starting materials. This reaction undergoes a palladium-catalyzed dual C-H activation/cyclization process to give facile access to a wide range of 1-aza[5]helicenes and 1-aza[6]helicenes with abundant functional groups (including F, Cl, Br, I, CF3, SeR, SR, and heteroaryl) in moderate to excellent yields, thereby providing new opportunities to fine-tune the properties of the helicene backbone. In addition, the obtained products could be further transformed into helicene-based Lewis base catalysts and redox switch materials easily. Notably, one selected 1-azahelicene shined bright yellow light by aggregation. These features enlarge the chemical space of 1-azahelicenes and inspire further utilization in other areas of research.

11.
Plant Physiol ; 2024 Oct 04.
Artículo en Inglés | MEDLINE | ID: mdl-39365781

RESUMEN

NONPHOTOTROPIC HYPOCOTYL3 (NPH3) is a key regulator of hypocotyl phototropism under both low- and high-intensity blue light (LBL/HBL), mediating phototropin1 (phot1) and phot2 signaling. NPH3 undergoes dephosphorylation and is released from the plasma membrane (PM) upon blue light irradiation. However, how its phosphorylation status and PM localization mediate phot1 and phot2 signaling in Arabidopsis (Arabidopsis thaliana) remains elusive. In this study, we found that fusing NPH3 with GFP at its C terminus (N3G) impaired its release from the PM, a defect exacerbated by a phosphorylation-deficient mutation, resulting in a dephosphorylated NPH3-GFP (N3AG). Unlike N3G, transgenic lines expressing N3AG exhibited defective hypocotyl phototropism under HBL, which could be rescued by myristoylation at the N-terminus of N3AG (mN3AG), indicating that NPH3 phosphorylation is not essential for HBL-induced phototropic responses when it is artificially anchored at the PM via its N terminus. Furthermore, genetic analysis revealed that N3AG anchored to the PM by its N terminus (as in mN3AG) only rescues phot1-mediated HBL responses, which require RPT2. However, N3AG failed to regulate phot2-mediated HBL signaling, regardless of its PM orientation. Taken together, our results revealed that NPH3 phosphorylation is essential for phot2-mediated hypocotyl phototropism under HBL, but is not required for phot1-mediated HBL signaling when the NPH3 N terminus is PM-anchored.

12.
CNS Neurosci Ther ; 30(10): e70057, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39404063

RESUMEN

AIMS: Brain structural alterations begin long before the presentation of brain disorders; therefore, we aimed to systematically investigate a wide range of influencing factors on neuroimaging markers of brain health. METHODS: Utilizing data from 30,651 participants from the UK Biobank, we explored associations between 218 modifiable factors and neuroimaging markers of brain health. We conducted an exposome-wide association study using the least absolute shrinkage and selection operator (LASSO) technique. Restricted cubic splines (RCS) were further employed to estimate potential nonlinear correlations. Weighted standardized scores for neuroimaging markers were computed based on the estimates for individual factors. Finally, stratum-specific analyses were performed to examine differences in factors affecting brain health at different ages. RESULTS: The identified factors related to neuroimaging markers of brain health fell into six domains, including systematic diseases, lifestyle factors, personality traits, social support, anthropometric indicators, and biochemical markers. The explained variance percentage of neuroimaging markers by weighted standardized scores ranged from 0.5% to 7%. Notably, associations between systematic diseases and neuroimaging markers were stronger in older individuals than in younger ones. CONCLUSION: This study identified a series of factors related to neuroimaging markers of brain health. Targeting the identified factors might help in formulating effective strategies for maintaining brain health.


Asunto(s)
Encéfalo , Neuroimagen , Humanos , Masculino , Femenino , Neuroimagen/métodos , Encéfalo/diagnóstico por imagen , Persona de Mediana Edad , Anciano , Adulto , Biomarcadores , Imagen por Resonancia Magnética/métodos , Reino Unido/epidemiología , Estilo de Vida
13.
Environ Geochem Health ; 46(11): 472, 2024 Oct 14.
Artículo en Inglés | MEDLINE | ID: mdl-39400656

RESUMEN

Wastewater containing phosphorus is often added by industrial activities, which is bad for the environment. In this study, composite biochar (PG-RS700) was prepared from phosphogypsum (PG) and rape straw (RS) for the treatment of phosphate in wastewater. SEM, FTIR, XRD and XPS characterization results showed that PG and RS were successfully combined. When PG-RS700 was dosed at 1.5 g/L and the phosphate solution concentration was 50 mg/L and pH = 8, the phosphate removal rate was 100% and the adsorption capacity was three times higher than the corresponding pure PG and RS. The quasi-secondary kinetic model indicated that the adsorption mechanism was chemisorption, and the maximum adsorption capacity for phosphate in the Langmuir isotherm model was 102.25 mg/g. Through pot experiment, the phosphorus adsorbed material obviously promoted the growth of plants. PG-RS700 can be used as a powerful adsorbent to treat phosphate in water and return it to soil as phosphate fertilizer.


Asunto(s)
Sulfato de Calcio , Carbón Orgánico , Fosfatos , Fósforo , Carbón Orgánico/química , Adsorción , Fósforo/química , Fosfatos/química , Sulfato de Calcio/química , Contaminantes Químicos del Agua/química , Cinética , Brassica rapa/química , Aguas Residuales/química , Fertilizantes , Espectroscopía Infrarroja por Transformada de Fourier
14.
BMC Cancer ; 24(1): 1223, 2024 Oct 02.
Artículo en Inglés | MEDLINE | ID: mdl-39358733

RESUMEN

BACKGROUND: To compare the differences in long-term quality of life (QoL) between survivors of paediatric and adult patients with nasopharyngeal carcinoma (NPC) and assess the clinical factors that predict long-term QoL. METHODS: We enrolled 420 long-term NPC survivors who were alive for at least 8 years after treatment, including 195 paediatric and 225 adult patients diagnosed and treated with intensity-modulated radiotherapy (IMRT) at Sun Yat-sen University Cancer Centre (SYSUCC) between 2011 and 2015. Data on clinical factors and EORTC QLQ-C30 were collected from all participants. The QoL of paediatric and adult NPC survivors was compared. RESULTS: The paediatric group had significantly better outcomes in global health status (paediatric: 80.2 ± 12.7; adult: 77.2 ± 11.5; P = 0.027), physical function (paediatric: 98.5 ± 4.6; adult: 95.1 ± 7.0; P < 0.001), role function (paediatric: 97.0 ± 9.2; adult: 90.5 ± 15.2; P < 0.001), social function (paediatric: 96.0 ± 8.9; adult: 93.5 ± 11.8; P = 0.038), insomnia (paediatric: 1.9 ± 7.8; adult: 13.1 ± 22.3; P < 0.001), constipation (paediatric: 1.3 ± 7.5; adult: 8.0 ± 17.4; P < 0.001), diarrhea (paediatric: 0.7 ± 4.6; adult: 2.8 ± 9.3; P = 0.010), and financial difficulties (paediatric: 1.9 ± 7.8; adult: 11.0 ± 19.8; P < 0.001), but poorer cognitive function (paediatric: 88.3 ± 9.9; adult: 93.8 ± 12.6; P < 0.001) than the adult group. Pretreatment clinical factors, including T stage, N stage, and pre-treatment EBV (Epstein-Barr Virus) DNA, showed a strong association with QoL. However, the factors that affected the QoL outcomes differed between the two groups. In survivors of paediatric cancer, global health status/QoL was strongly correlated with T stage (P < 0.001) and clinical stage (P = 0.018), whereas it was strongly correlated with pre-treatment EBV DNA (P = 0.008) in adults. CONCLUSION: Paediatric survivors of NPC have a significantly better QoL than adult NPC survivors. Moreover, pre-treatment T stage, N stage, and EBV DNA significantly influenced the overall health status of the survivors. These results highlight the need to tailor care to both age groups to promote better long-term health outcomes.


Asunto(s)
Supervivientes de Cáncer , Carcinoma Nasofaríngeo , Neoplasias Nasofaríngeas , Calidad de Vida , Radioterapia de Intensidad Modulada , Humanos , Masculino , Femenino , Carcinoma Nasofaríngeo/radioterapia , Carcinoma Nasofaríngeo/psicología , Radioterapia de Intensidad Modulada/efectos adversos , Radioterapia de Intensidad Modulada/métodos , Adulto , Niño , Supervivientes de Cáncer/psicología , Supervivientes de Cáncer/estadística & datos numéricos , Adolescente , Persona de Mediana Edad , Neoplasias Nasofaríngeas/radioterapia , Neoplasias Nasofaríngeas/psicología , Adulto Joven , Anciano , Estado de Salud
15.
Cancer Pathog Ther ; 2(4): 299-313, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39371100

RESUMEN

Background: Colon cancer is a malignant tumor with high malignancy and a low survival rate whose heterogeneity limits systemic immunotherapy. Transforming growth factor-ß (TGF-ß) signaling pathway-related genes are associated with multiple tumors, but their role in prognosis prediction and tumor microenvironment (TME) regulation in colon cancer is poorly understood. Using bioinformatics, this study aimed to construct a risk prediction signature for colon cancer, which may provide a means for developing new effective treatment strategies. Methods: Using consensus clustering, patients in The Cancer Genome Atlas (TCGA) with colon adenocarcinoma were classified into several subtypes based on the expression of TGF-ß signaling pathway-related genes, and differences in survival, molecular, and immunological TME characteristics and drug sensitivity were examined in each subtype. Ten genes that make up a TGF-ß-related predictive signature were found by least absolute shrinkage and selector operation (LASSO) regression using colon cancer data from the TCGA database and confirmed using a Gene Expression Omnibus (GEO) dataset. A nomogram incorporating risk scores and clinicopathologic factors was developed to stratify the prognosis of patients with colon cancer for accurate clinical diagnosis and therapy. Results: Two TGF-ß subtypes were identified, with the TGF-ß-high subtype being associated with a poorer prognosis and superior sensitivity to immunotherapy. Mutation analyses showed a high incidence of gene mutations in the TGF-ß-high subtype. After completing signature construction, patients with colon cancer were categorized into high- and low-risk subgroups based on the median risk score of the TGF-ß-related predictive signature. The risk score exhibited superior predictive performance relative to age, gender, and stage, as evidenced by its AUC of 0.686. Patients in the high-risk subgroup had higher levels of immunosuppressive cell infiltration and immune checkpoints in the TME, suggesting that these patients had better responses to immunotherapy. Conclusions: Patients with colon cancer were divided into two subtypes with different survival and immune characteristics using consensus clustering analysis based on TGF-ß signaling pathway-related genes. The constructed risk prediction signature may show promise as a biomarker for evaluating the prognosis of colon cancer, with potential utility for screening individuals for immunotherapy.

16.
Rev Sci Instrum ; 95(10)2024 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-39451104

RESUMEN

High-precision phasemeters are a key technology in intersatellite laser interferometers used for detecting gravitational waves (GWs) in space. As the core of the readout system, the phasemeter must operate in the bandwidth of 5-25 MHz, and its resolution needs to reach the order of µrad/Hz at mHz. It presents significant challenges to electronic signal processing technology. To investigate the primary noise source in the low-frequency band, a mathematical model of thermal drift to phase noise was established, and a multi-point temperature sensing scheme for critical electronic components was proposed. In particular, we evaluated a phasemeter based on a commercial platform and assessed the thermal drift noise according to the proposed model. This study identifies and explains the effects of temperature linear drift and overcorrection in components, demonstrating that thermal drift noise is the main noise source for the phasemeter at frequencies from 0.1 to 1 mHz. In addition, the proposed scheme is universal in its applicability and may be implemented in any circuit for the evaluation of temperature effects on the components of interest.

17.
Yi Chuan ; 46(10): 779-794, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39443308

RESUMEN

With the rapid development of high-throughput sequencing technology in the past decade, an increasing number of sequencing methods targeting different types of DNA damage have been developed and widely used in the field. These technologies not only help to elucidate the dynamic processes of repair pathways corresponding to different types of lesions, understand the underlying mechanisms of key factors and identify new hotspots prone to damage, but also greatly advanced our knowledge of crucial physiological processes such as meiotic homologous recombination, antibody generation and cytosine demethylation. These advancements hold significant potential for broader applications in exploring disease initiation and drug development. However, understanding and selecting the appropriate techniques have become difficult. This article reviews the main sequencing detection methods for the most common DNA lesions and introduce their principles, thereby providing valuable insights for the selection, application, further development and optimization of these technologies.


Asunto(s)
Daño del ADN , Reparación del ADN , Secuenciación de Nucleótidos de Alto Rendimiento , Secuenciación de Nucleótidos de Alto Rendimiento/métodos , Humanos , Animales , ADN/genética
19.
Artículo en Inglés | MEDLINE | ID: mdl-39477908

RESUMEN

PURPOSE: With urbanization and industrialization process accelerated, humans are exposed more and more trace elements. This study aimed to explore the potential associations of trace elements with the outcomes of in vitro fertilization embryo transfer (IVF-ET). METHODS: Total 181 women who underwent IVF-ET were enrolled, among which 89 women underwent fresh ET after IVF. Trace elements were measured in the serum and follicular fluid (FF) samples by inductively coupled plasma-mass spectroscopy. The associations of the levels of different trace elements with IVF-ET outcomes, including normal fertilization, high-quality embryos, and clinical pregnancy (fresh ET) were analyzed. RESULTS: Twenty-five out of twenty-eight trace elements showed higher concentrations in the serum than those in the FF. Normal fertilization was positively associated with Cu and Mn in the FF. High-quality embryos was positively associated with Cu in the serum and FF, and Zn in the serum. Clinical pregnancy was positively associated with Ge in the serum, and inversely associated with Al, Ba, and Pb in the serum. Additionally, poor outcomes of IVF-ET should be noticed in women with FF level of Cu < 955.38 ng/mL, FF level of Mn < 3.42 ng/mL, serum level of Ge < 6.11 ng/mL, serum level of Al > 28.44 ng/mL, and serum level of Pb > 0.90 ng/mL. CONCLUSIONS: IVF-ET outcomes were positively associated with Cu, Mn, Zn, and Ge, and inversely associated with Al and Pb. Properly controlling the exposure of relevant trace elements is necessary for patients with the need of IVF-ET.

20.
Cell Rep ; 43(10): 114814, 2024 Oct 22.
Artículo en Inglés | MEDLINE | ID: mdl-39378153

RESUMEN

Fate determination of neural stem cells (NSCs) is crucial for cortex development and is closely linked to neurodevelopmental disorders when gene expression networks are disrupted. The transcriptional corepressor chromodomain Y-like (CDYL) is widely expressed across diverse cell populations within the human embryonic cortex. However, its precise role in cortical development remains unclear. Here, we show that CDYL is critical for human cortical neurogenesis and that its deficiency leads to a substantial increase in gamma-aminobutyric acid (GABA)-ergic neurons in cortical organoids. Subsequently, neuronatin (NNAT) is identified as a significant target of CDYL, and its abnormal expression obviously influences the fate commitment of cortical NSCs. Cross-species comparisons of CDYL targets unravel a distinct developmental trajectory between human cortical organoids and the mouse cortex at an analogous stage. Collectively, our data provide insight into the evolutionary roles of CDYL in human cortex development, emphasizing its critical function in maintaining the fate of human cortical NSCs.


Asunto(s)
Proteínas del Tejido Nervioso , Prosencéfalo , Animales , Humanos , Ratones , Diferenciación Celular , Corteza Cerebral/metabolismo , Corteza Cerebral/citología , Corteza Cerebral/embriología , Neuronas GABAérgicas/metabolismo , Proteínas de la Membrana/metabolismo , Proteínas de la Membrana/genética , Proteínas del Tejido Nervioso/metabolismo , Proteínas del Tejido Nervioso/genética , Células-Madre Neurales/metabolismo , Células-Madre Neurales/citología , Neurogénesis , Organoides/metabolismo , Prosencéfalo/metabolismo , Prosencéfalo/citología , Prosencéfalo/embriología
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