Nickel-induced contact dermatitis is a severe allergic reaction to objects or environments that contain nickel. Many nanomaterials have been developed to reduce skin allergies by capturing nickel, ...but few agents are effective and safe. In this work, mesoporous silica nanoparticles (MSN) were synthesized and decorated with hexa-histidine peptides (denoted as MSN-His
), making it a strong nickel chelator. Subsequently, a dietary polyphenol, chlorogenic acid, was loaded into the mesopores of MSN (denoted as MSN-His
@CGA), realizing the potential of its anti-inflammatory properties. In vitro and in vivo experiments revealed that the synthesized MSN-His
@CGA nanoparticles exhibited more stable and stronger chelation, better biocompatibility, and ideal allergy-relieving ability, whether for environmental metal contamination or for allergic contact dermatitis caused by prolonged nickel exposure. Thus, the application of mesoporous silica-based nanoparticles may represent an ideal approach to alleviate skin allergies by capturing nickel, which would benefit people who suffer from metal-induced contact dermatitis.
Renal cell carcinoma (RCC) with haemangioblastoma-like characteristics is a type of RCC reported in recent years. RCC with (angio) leiomyomatous stroma (RCCLMS) was included as a provisional entity ...of the 2016 World Health Organization (WHO) classification. RCC with haemangioblastoma-like characteristics and leiomyomatous stroma is extremely rare. This is the first report of a rare tumour harbouring TSC2 and SETD2 variations.
The patient was a 38-year-old woman who presented with discomfort in the area of her right kidney. Ultrasound and enhanced CT showed a right renal mass, and clear cell renal cell carcinoma (CCRCC) was suspected; hence, robot-assisted laparoscopic nephron-sparing partial nephrectomy was performed. Gross examination revealed a well-circumscribed tumour measuring 2.0 cm × 1 cm × 0.7 cm under the renal capsule adjacent to the stripping edge that was greyish yellow and greyish red in colour. Histologic examination showed that the tumour consisted of three different structures: a CCRCC-like region, a haemangioblastoma-like region, and a focal leiomyomatous stroma component. Based on immunohistochemistry, the CCRCC-like region was diffusely strongly positive for AE1/AE3, vimentin, CAIX, PAX8, PAX2, CK7, and CAM5.2, partly positive for HNF1α, and negative for CD10, α-inhibin, NSE, S-100, CD34, and TFE3. The haemangioblastoma-like area was diffusely positive for vimentin, CAIX; partly positive for PAX8, PAX2, α-inhibin, and S-100; mostly positive for NSE; and slightly positive for HNF1α; the CD34 staining highlighted the complex capillary network. The Ki67 index was approximately 1-2% in the two above areas, and the leiomyomatous stroma was strongly positive for SMA. The whole-exon sequencing (WES) showed TSC2 and SETD2 variations. There was no progression after 18 months of follow-up.
We report for the first time a unique case of RCC with haemangioblastoma-like features and leiomyomatous stroma accompanied by rare molecular abnormalities. Whether this is a new tumour entity or a variant of clear cell carcinoma remains to be determined. The biological behaviour and clinical characteristics need to be further examined.
This study aimed to investigate the impact of different doses of chlorogenic acid and Ganoderma lucidum polysaccharide on lipid accumulation using an obese rat model. We utilized blood glucose ...assays, oil red O staining, and triglyceride content analysis to examine the effects of chlorogenic acid combined with G. lucidum polysaccharide on fat metabolism in rats. We found substantial potential in using chlorogenic acid combined with G. lucidum polysaccharide for weight control and metabolic regulation in obese rats. After a long-term dietary intervention, chlorogenic acid and G. lucidum polysaccharide markedly inhibited the expression of proteins related to fatty acid synthesis, including AMP-activated protein kinase, fatty acid synthase, and SREBP-1c, leading to reduced body weight and decreased hepatic fat deposition. Additionally, the combined treatment substantially affected enzymes and proteins involved in glucose metabolism, reducing glycogen synthase expression and indicating a potential mechanism for weight reduction through glycogen synthesis inhibition. Furthermore, elevated glucose kinase levels indicated that chlorogenic acid and G. lucidum polysaccharide may enhance hepatic glycogen degradation, thereby reducing hepatic fat accumulation. These findings reveal that chlorogenic acid combined with G. lucidum polysaccharide has a synergistic impact, providing a theoretical basis for their potential as a combined therapeutic approach for obesity.
We have developed a model design for facile fabrication of multicolor (including white light) fluorescent dual-polymer hydrogels by tuning the stoichiometry of metal ions. The hydrogels exhibit high ...mechanical strength and reversible acidity/alkalinity stimuli-responsive properties, which can further lead to fluorescent patterned hydrogels.
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We have developed a facile strategy to fabricate model multicolor hydrogels via a straightforward mixing process of poly acrylonitrile-grafted methacrylamide (PANMAM), polymethacrylic acid (PMAA) and doped lanthanide (Eu/Tb) and zinc ions to form the interpenetrating dual-polymer gel networks. The hydrogels exhibit excellent tunability of multi-spectrum emission colors (including white light) by simply varying the stoichiometry of metal ions. Furthermore, taking the advantage of different metal ion response mechanisms, we have demonstrated the reversible acidity/alkalinity stimuli-responsive behaviors of white-light-emitting hydrogel (WLE gel). Meanwhile, the unique cross-linked network formed through hydrogen-bonding, metal-ligand coordination and ionic interaction is introduced to achieve favorable mechanical strength of hydrogels. These properties enable the possibility in obtaining fluorescent patterns on hydrogels, which are promising candidate for encrypted information with improved security.
A straightforward three-component coassembly driving by the hydrogen bond is developed towards the controlled release and cancer treatment.
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A straightforward coassembly strategy was ...developed for the preparation of polymeric nanoparticles driving by the intermolecular hydrogen bond between neutral poly(2-methyl-2-oxaozline) (PMeOx), tannic acid (TA) and doxorubicin hydrochloride (Dox). The occurrence of the hydrogen-bonding amongst the different functionalities within the formed nanoparticles was verified by infrared (IR) spectroscopy. Scanning electron microscopy (SEM), dynamic light scattering (DLS), UV–vis absorption and photoluminescent measurements indicated the rapid formation of uniform and water dispersible/stable nanoparticles. The relative poor stability of PMeOx-TA-Dox in fetal bovine serum (FBS) solution enabled the rapid separation of Dox and PMeOx-TA, facilitating the release of Dox and its entrance into cellular nuclei as revealed by confocal laser scanning microscopy (CLSM). The presented strategy may provide an efficient alternative for the construction of multifunctional nanomedicines.
Screening high‐efficiency 2D conjugated polymers toward visible‐light‐driven overall water splitting (OWS) is one of the most promising but challenging research directions to realize ...solar‐to‐hydrogen (STH) energy conversion and storage. “Mystery molecule” heptazine is an intriguing hydrogen evolution reaction (HER) building block. By covalently linking with the electron‐rich alkynyl and phenyl oxygen evolution reaction (OER) active units, 10 experimentally feasible 2D covalent heptazine‐based frameworks (CHFs) are constructed and screened four promising visible‐light‐driven OWS photocatalysts, which are linked by p‐phenyl (CHF‐4), p‐phenylenediynyl (CHF‐7), m‐phenylenediynyl (CHF‐8), and phenyltriynyl (CHF‐9), respectively. Their HER and OER active sites achieve completely spatially separated, where HER active sites focus on heptazine units and OER active sites located on alkynyl or phenyl units. Their lower overpotentials allow them to spontaneously trigger the surface OWS reaction under their own light‐induced bias without using any sacrificial agents and cocatalysts. Among them, CHF‐7 shows the best photocatalytic performance with an ideal STH energy conversion efficiency estimated at 12.04%, indicating that it is a promising photocatalyst for industrial OWS. This work not only provides an innovative idea for the exploration of novel polymer photocatalysts for OWS but also supplies a direction for the development of heptazine derivatives.
Ten 2D covalent heptazine‐based frameworks (CHFs) are designed and constructed by covalently linking the heptazine with alkynyl, phenyl, or alkynyl‐phenyl unit with a periodic strategy, in which four 2D CHFs (CHF‐4, CHF‐7, CHF‐8, and CHF‐9) are identified as high‐efficiency photocatalysts toward OWS. Their HER and OER active sites achieve complete spatial separation and exhibit low overpotential during OWS.
We report growth of single-crystal Cd0.9Zn0.1Te ingots while using the pressure-controlled Bridgman method. The Cd pressure was controlled during growth to suppress its evaporation from the melt and ...reduce the size of Te inclusions in the as-grown crystals. The accelerated crucible rotation technique (ACRT) was used to suppress constitutional supercooling. The fast accelerating and slow decelerating rotation speeds were optimized. Two-inch Cd0.9Zn0.1Te single-crystal ingots without grain boundaries or twins were grown reproducibly. Glow discharge mass spectrometry results indicate the effective segregation coefficients of Zn and In dopants are 1.24 and 0.18, respectively. The full width half maximum (FWHM) of X-ray rocking curve was approximately 22.5 ″, and the IR transmittance was approximately 61%, indicating high crystallinity. The mean size of the Te inclusions was approximately 13.4 μm. Single-crystal wafers were cut into 5 × 5 × 2 mm3 slices and then used to fabricate gamma ray detectors. The energy resolution and peak-to-valley ratio maps were constructed while using 59.5 keV gamma ray measurements, which proved the high uniformity of detection performance.
CdMnTe (CMT) has been recently considered to be a good candidate as a promising material for the manufacture of room-temperature nuclear radiation detectors due to its better lattice strengthening, ...wider band gap energy and low segregation potential. This paper reports the recent progress of detector-grade CMT crystals in Northwestern Polytechnical University. CdMnTe:In ingots with diameter of 30mm were grown using a Modified Vertical Bridgman (MVB) method. Current–voltage measurements were performed on single element planar configuration structure with Au electrode and the obtained resistivity of CMT samples was up to 6.19×1010Ωcm. PL spectra and IR transmittance measurement on the samples were revealed that the as-grown CMT crystal possess of high quality. IR microscope showed that the Te inclusions in CMT are 10–20μm in diameter and within the range 1×104–3×104cm−3 in concentration. The 241Am gamma-ray spectral was obtained for the CMT single planar detector with the energy resolution of 12.38% of the 59.5keV peak. The mobility-lifetime products for the electron and hole of the as-grown CMT crystals were evaluated to be 1.22×10−3cm2V−1 and 3.0×10−5cm2V−1, respectively.
To reveal the complicated mechanism of the multicomponent mass transfer during the growth of ternary compound semiconductors, a numerical model based on Maxwell-Stefan equations was developed to ...simulate the Bridgman growth of CdZnTe crystal. The Maxwell-Stefan diffusion coefficients in the melt were estimated. Distributions of Zn, Cd, and Te were calculated with variable ampoule traveling rate and diffusion coefficients. The experimental results show that Zn in melt near the growth interface decreases and diffuses from the bulk melt to the growth interface. For Cd, the situation is just the opposite. The coupling effects of Zn and Cd diffusions result in an uphill diffusion of Te at the beginning of the growth. Throughout the growth, the concentration of Te in the melt keeps low near the growth interface but high far from the growth interface. Increasing the ampoule traveling rate will aggravate the segregation of Zn and Cd, and hence deteriorate the uniformity of Te. We also find that not only the diffusion coefficients but also the ratios between them have significant influence on the species diffusions.
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