Association between Ki-67 and clinical outcomes in 324 Chinese patients with resectable acral melanoma.

The relationship between Ki-67 expression and clinical prognosis in patients with resectable acral melanoma (AM) remains unclear. This study explores the prognostic role of Ki-67 in AM using data from 324 patients across five Chinese centers. Patients were divided into low Ki-67 expression and high Ki-67 expression groups based on pathological reports.

Photosensitized Imino-Thiocarbamation of Alkenes.

A metal-free, photosensitized 1,2-imino-thiocarbamation of olefins was developed using a custom-designed bifunctional reagent, diphenylmethanone -dimethylcarbamothioyl oxime. A broad range of olefins with diverse electronic features were successfully transformed to the corresponding β-imino-thioesters, with yields ranging from moderate to high. This protocol offers several advantages, including metal-free process, 100% atom economy, simple operation, and scalability.

Rational Design of Zero-Dimensional Gold Cluster/Two-Dimensional TMD Heterostructures for Enhanced Photocatalytic and Optoelectronic Performance.

In optoelectronic conversion technologies and photocatalytic applications, single-component materials often face limitations such as low carrier separation efficiency and restricted bandgap tunability. To overcome the limitations of single-component materials in optoelectronics and photocatalysis, we constructed 0D/2D van der Waals heterostructures (vdWHs) by loading gold clusters (Au, = 4, 10, and 20) onto monolayer transition metal dichalcogenides (TMDs). Notably, the Au/MoS vdWH exhibits Z-scheme charge transfer behavior, which promotes efficient electron-hole separation while retaining a high redox potential, thereby significantly improving its photoelectrochemical performance.

Study on the cocrystal of arginine and acetylsalicylic acid using vibrational spectroscopy and DFT calculations.

Drug repositioning and reuse is a cost-effective strategy for the development of new drugs, and drug co-crystal is a fast and effective technical means. Acetylsalicylic acid is a BCS II drug, which has the limitations of high permeability and low solubility, and the safety and efficacy of the drug have been greatly affected. Co-crystallization with other forming agents is considered to be a promising technical means, which can not only increase the solubility, but also improve the dissolution rate and stability.

Poor prognosis of early-stage acral melanoma with a history of trauma: a multicenter analysis of 468 patients.

Background: Previous studies have suggested that trauma may be a risk factor for the development and prognosis of acral melanoma (AM).

Methods: This population-based retrospective cohort study included patients with AM and a confirmed history of trauma who received treatment at 5 melanoma treatment centers in China. Factors associated with recurrence and survival were analyzed using univariate and multivariate Cox regression analyses.

MEK inhibitors for the treatment of immunotherapy-resistant, AGK-BRAF fusion advanced acral melanoma: a case report and literature review.

Purpose: Acral melanoma (AM), a rare and aggressive melanoma subtype with poor prognosis, presents unique challenges in treatment due to its distinct molecular and immune characteristics. This case report describes a patient with AM harboring an AGK-BRAF fusion mutation, aiming to explore potential mechanisms of resistance to current treatment modalities.

Methods: We analyzed tumor tissue samples from the primary and metastatic lesions of the patient using next-generation sequencing (NGS) for genomic profiling and multiplex immunohistochemistry (mIHC) to assess the immune microenvironment.

Photosensitized Imino-Thiocyanation of Alkenes.

A metal-free photosensitized 1,2-imino-thiocyanation of olefins has been established by using the easily accessible bifunctional reagent -cyano--(diphenylmethylene) thiohydroxylamine. A wide range of olefins were successfully transformed into the corresponding β-iminothiocyanates in moderate to high yields. This protocol stands out for its metal-free nature, broad substrate compatibility, and high atom and step economy, providing an effective strategy for assembling β-amino thiocyanate-containing scaffolds.

Theoretical study on the conformation-dependent charge transfer of the excited state of dopamine.

Clarifying the relationship between conformation and charge transfer is crucial for understanding the functional mechanisms of molecules in organisms. Theoretical calculations of dopamine, N,N-dimethyldopamine, and N,N-dihydroxydopamine were related to conformation and charge transfer, and the charge transfer of the excited state was clearly characterized. First, the stable configuration of the ground state of the molecule was optimized, and the potential energy of the ionic state was scanned to select all conformations, except for the chiral problem.

FTO Alleviates Hepatic Ischemia-Reperfusion Injury by Regulating Apoptosis and Autophagy.

Despite N-methyladenosine (mA) being closely involved in various pathophysiological processes, its potential role in liver injury is largely unknown. We designed the current research to study the potential role of fat mass and obesity-associated protein (FTO), an mA demethylase, on hepatic ischemia-reperfusion injury (IRI). Wild-type mice injected with an adeno-associated virus carrying fat mass and obesity-associated protein (AAV-FTO) or adeno-associated virus carrying green fluorescent protein (GFP) (AAV-GFP) were subjected to a hepatic IRI model in vivo.

Nevus-associated acral melanoma has lower risk of recurrence and mortality than de novo acral melanoma: A multicenter, retrospective analysis of 482 patients.

Background: It is unknown whether acral melanomas (AMs) associated with pre-existing nevi have similar risk to other AMs.

Objective: To compare risk of recurrence and death between AMs associated with pre-existing nevi and de novo AMs.

Methods: We conducted a multicenter retrospective cohort study involving patients diagnosed with AMs between February 2011 and November 2022.

ALKBH5 Protects Against Hepatic Ischemia-Reperfusion Injury by Regulating YTHDF1-Mediated YAP Expression.

Ischemia/reperfusion (I/R) injury with severe cell death is a major complication involved in liver transplantation and resection. The identification of key regulators improving hepatocyte activity may provide potential strategies to clinically resolve I/R-induced injury. N-methyladenosine (mA) RNA modification is essential for tissue homeostasis and pathogenesis.

Observation of reversible conformational interconversion accompanied by 3p internal conversions in Rydberg-excited N,N-dimethylethylamine.

Conformational dynamics has been well observed in the 3s Rydberg state of amines, whereas its observation in higher-energy, non-equilibrium 3p Rydberg states is very rare, especially for a reversible conformational transition that could compete with other non-adiabatic transitions. Herein, we report the observation of a reversible conformational interconversion phenomenon in the 3p Rydberg excited-state dynamics of N,N-dimethylethylamine (DMEA). Upon electronic excitation, a forward and backward interconversion between the initially prepared 3p_l and 3p_h conformers accompanied by 3p internal conversions occurs, resulting in a 3p_l/3p_h equilibrium ratio of 61 %/39 % within ∼1.

Development and validation of a nomogram for predicting occurrence of severe case in children hospitalized with influenza A (H1N1) infection during the post-COVID-19 era.

Background: The significant rebound of influenza A (H1N1) virus activity, particularly among children, with rapidly growing number of hospitalized cases is of major concern in the post-COVID-19 era. The present study was performed to establish a prediction model of severe case in pediatric patients hospitalized with H1N1 infection during the post-COVID-19 era.

Methods: This is a multicenter retrospective study across nine public tertiary hospitals in Yunnan, China, recruiting pediatric H1N1 inpatients hospitalized at five of these centers between February 1 and July 1, 2023, into the development dataset.

A novel combined nomogram for predicting severe acute lower respiratory tract infection in children hospitalized for RSV infection during the post-COVID-19 period.

Introduction: Off-season upsurge of respiratory syncytial virus (RSV) infection with changed characteristics and heightened clinical severity during the post-COVID-19 era are raising serious concerns. This study aimed to develop and validate a nomogram for predicting the risk of severe acute lower respiratory tract infection (SALRTI) in children hospitalized for RSV infection during the post-COVID-19 era using machine learning techniques.

Methods: A multicenter retrospective study was performed in nine tertiary hospitals in Yunnan, China, enrolling children hospitalized for RSV infection at seven of the nine participating hospitals during January-December 2023 into the development dataset.

Theoretical Insights of Curvature Effects of FeN-Doped Carbon Nanotubes on ORR Activity.

The advancement of metal-air batteries is critically contingent on the progression of efficient catalysts for the oxygen reduction reaction (ORR). The potential applications of a series of FeN-doped carbon nanotubes (Fe-NCNTs) of varying diameters as ORR catalysts were examined using density functional theory. We explored the stability and electronic properties of Fe-NCNTs by analyzing the energy and examining the density of states.

The Selectivity Origins in Ag-Catalyzed CO Electroreduction.

Ag exhibits high selectivity of electrochemical CO reduction (COR) toward C products, while the hydrogenation involving the concerted proton-electron transfer (CPET) or sequential electron-proton transfer (SEPT) mechanism is still in debate. Toward a better understanding of the Ag-catalyzed electrochemical COR, we employed a microkinetic model based on the Marcus electron transfer theory to thoroughly investigate the selectivity of C products of electrochemical COR over the Ag(111) surface. We found that at an acidic condition of pH = 1.

Ultrafast conformation-dependent charge transfer in N, N, N', N'-tetramethyl-1,3-propanediamine: Effect of flexible carbon skeleton on electron lone pair interactions.

Flexible three-carbon skeleton makes N, N, N', N'-tetramethyl-1,3-propanediamine (TMPDA) an important diamine system to investigate the conformation-dependent electron lone pair interactions and charge delocalization. The charge transfer process linked to structural motions of the three-carbon skeleton has been monitored in real time by the Rydberg electron binding energy (BE) spectra of TMPDA coupled with quantum chemical calculations. Optical excitation to the 3p state with a 200 nm pump pulse initially generated a localized charge on one of the two nitrogen atoms that may partially transfer to the other one.

Exploring and validating heating dynamics in a radio-frequency electromagnetic field-based resonant chamber for mouse hyperthermia research.

Mild whole-body hyperthermia has been shown to have anti-tumor effects through an immune-modulating mechanism. Before it is widely applied in the clinic, tremendous mechanistic research in animals is necessary to adhere to evidence-based principles. The radio frequency electromagnetic field (RF-EMF) based heating facility could be a good choice for hyperthermia treatment, but the heating characteristics of a facility, including structure design, electromagnetic and thermal dosimetry, and the biologic effects of hyperthermia, need to be well elucidated.

Bortezomib elevates intracellular free Fe by enhancing NCOA4-mediated ferritinophagy and synergizes with RSL-3 to inhibit multiple myeloma cells.

Iron contributes to tumor initiation and progression; however, excessive intracellular free Fe can be toxic to cancer cells. Our findings confirmed that multiple myeloma (MM) cells exhibited elevated intracellular iron levels and increased ferritin, a key protein for iron storage, compared with normal cells. Interestingly, Bortezomib (BTZ) was found to trigger ferritin degradation, increase free intracellular Fe, and promote ferroptosis in MM cells.

Evaluation of disease severity and prediction of severe cases in children hospitalized with influenza A (H1N1) infection during the post-COVID-19 era: a multicenter retrospective study.

Background: The rebound of influenza A (H1N1) infection in post-COVID-19 era recently attracted enormous attention due the rapidly increased number of pediatric hospitalizations and the changed characteristics compared to classical H1N1 infection in pre-COVID-19 era. This study aimed to evaluate the clinical characteristics and severity of children hospitalized with H1N1 infection during post-COVID-19 period, and to construct a novel prediction model for severe H1N1 infection.

Methods: A total of 757 pediatric H1N1 inpatients from nine tertiary public hospitals in Yunnan and Shanghai, China, were retrospectively included, of which 431 patients diagnosed between February 2023 and July 2023 were divided into post-COVID-19 group, while the remaining 326 patients diagnosed between November 2018 and April 2019 were divided into pre-COVID-19 group.

A radical 1,4-aryl migration enables nickel-catalysed remote cross-electrophile coupling of β-bromo amino acid esters with vinyl triflates.

A radical 1,4-aryl migration enabling a cross-electrophile coupling reaction toward remote alkylation of -benzyl alanine has been developed. In this strategy, with the occurrence of a radical-mediated Turce-Smiles rearrangement, key α-aminoalkyl radicals are generated. The as-formed α-aminoalkyl radical serves as a robust coupling partner for cross-electrophilic coupling with vinyl triflates, affording a series of olefin-tethered amino acid motifs.

Role of amorphous engineering and cerium doping in NiFe oxyhydroxide for electrocatalytic water oxidation.

Amorphous engineering and atomistic doping provide an effective way to improve the catalytic activity in the oxygen evolution reaction (OER) of transition metal layered double hydroxides. Herein, Cerium (Ce) was introduced into NiFe-based oxyhydroxide using a modified aqueous sol-gel procedure. Ce as an electron acceptor promoted the coupling oxidation of Ni/ in NiFe oxyhydroxide, and the activated oxyhydroxide showed excellent catalytic activity in OER.

RuO Catalysts for Electrocatalytic Oxygen Evolution in Acidic Media: Mechanism, Activity Promotion Strategy and Research Progress.

Proton Exchange Membrane Water Electrolysis (PEMWE) under acidic conditions outperforms alkaline water electrolysis in terms of less resistance loss, higher current density, and higher produced hydrogen purity, which make it more economical in long-term applications. However, the efficiency of PEMWE is severely limited by the slow kinetics of anodic oxygen evolution reaction (OER), poor catalyst stability, and high cost. Therefore, researchers in the past decade have made great efforts to explore cheap, efficient, and stable electrode materials.