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1.
Sci Bull (Beijing) ; 2024 Apr 29.
Artigo em Inglês | MEDLINE | ID: mdl-38777682

RESUMO

Lunar exploration is deemed crucial for uncovering the origins of the Earth-Moon system and is the first step for advancing humanity's exploration of deep space. Over the past decade, the Chinese Lunar Exploration Program (CLEP), also known as the Chang'e (CE) Project, has achieved remarkable milestones. It has successfully developed and demonstrated the engineering capability required to reach and return from the lunar surface. Notably, the CE Project has made historic firsts with the landing and on-site exploration of the far side of the Moon, along with the collection of the youngest volcanic samples from the Procellarum KREEP Terrane. These achievements have significantly enhanced our understanding of lunar evolution. Building on this success, China has proposed an ambitious crewed lunar exploration strategy, aiming to return to the Moon for scientific exploration and utilization. This plan encompasses two primary phases: the first crewed lunar landing and exploration, followed by a thousand-kilometer scale scientific expedition to construct a geological cross-section across the lunar surface. Recognizing the limitations of current lunar exploration efforts and China's engineering and technical capabilities, this paper explores the benefits of crewed lunar exploration while leveraging synergies with robotic exploration. The study refines fundamental lunar scientific questions that could lead to significant breakthroughs, considering the respective engineering and technological requirements. This research lays a crucial foundation for defining the objectives of future lunar exploration, emphasizing the importance of crewed missions and offering insights into potential advancements in lunar science.

2.
Int J Biol Macromol ; 269(Pt 2): 132128, 2024 May 07.
Artigo em Inglês | MEDLINE | ID: mdl-38723807

RESUMO

Selenium-rich tea polysaccharides (Se-TPS) were extracted via high hydrostatic pressure technology with a pressure of 400 MPa (200-500 MPa) for 10 min (3-20 min) at a material-to-solvent ratio of 1:40 (1:20-1:50). Subsequently, Se-TPS1-4 were isolated and purified, with Se-TPS3-4 as the main components. A spectral analysis proved that Se, which has antioxidant activity, existed. An in vitro study found that among Se-TPS, Se-TPS3-4 attenuated the release of ß-hexosaminidase, histamine, and interleukin (IL)-4. Furthermore, in vivo experiments revealed that treatment with Se-TPS downregulated IL-4 levels and upregulated TGF-ß and interferon-γ levels to improve imbalanced Th1/Th2 immunity in tropomyosin-sensitized mice. Moreover, Se-TPS promoted Lactobacillus and norank_f_Muribaculaceaek growth and upregulated metabolites such as genipin and coniferyl alcohol. Overall, these results showed the strong anti-allergy potential of Se-TPS by regulating mast cell-mediated allergic inflammatory responses and microbiota regulation, highlighting the potential of Se-TPS as a novel therapeutic agent to regulate allergy-associated metabolic disorders.

3.
Neoplasia ; 53: 101005, 2024 May 17.
Artigo em Inglês | MEDLINE | ID: mdl-38761506

RESUMO

Colorectal cancer (CRC) stands as a prevalent malignancy globally. A pivotal event in CRC pathogenesis involves the loss-of-function mutation in the APC gene, leading to the formation of benign polyps. Despite the well-established role of APC, the contribution of CUL4B to CRC initiation in the pre-tumorous stage remains poorly understood. In this investigation, we generated a murine model by crossing ApcMin/+ mice with Cul4bΔIEC mice to achieve specific deletion of Cul4b in the gut epithelium against an ApcMin/+ background. By employing histological methods, RNA-sequencing (RNA-seq), and flow cytometry, we assessed alterations and characterized the immune microenvironment. Our results unveiled that CUL4B deficiency in gut epithelium expedited ApcMin/+ adenoma formation. Notably, CUL4B in adenomas restrained the accumulation of tumor-infiltrating myeloid-derived suppressor cells (MDSCs). In vivo inhibition of MDSCs significantly delayed the growth of CUL4B deleted ApcMin/+ adenomas. Furthermore, the addition of MDSCs to in vitro cultured ApcMin/+; Cul4bΔIEC adenoma organoids mitigated their alterations. Mechanistically, CUL4B directly interacted with the promoter of Csf3, the gene encoding granulocyte-colony stimulating factor (G-CSF) by coordinating with PRC2. Inhibiting CUL4B epigenetically activated the expression of G-CSF, promoting the recruitment of MDSCs. These findings offer novel insights into the tumor suppressor-like roles of CUL4B in regulating ApcMin/+ adenomas, suggesting a potential therapeutic strategy for CRC initiation and progression in the context of activated Wnt signaling.

4.
Sheng Wu Yi Xue Gong Cheng Xue Za Zhi ; 41(2): 360-367, 2024 Apr 25.
Artigo em Chinês | MEDLINE | ID: mdl-38686418

RESUMO

Tumor-treating fields (TTFields) is a novel treatment modality for malignant solid tumors, often employing electric field simulations to analyze the distribution of electric fields on the tumor under different parameters of TTFields. Due to the present difficulties and high costs associated with reproducing or implementing the simulation model construction techniques, this study used readily available open-source software tools to construct a highly accurate, easily implementable finite element simulation model for TTFields. The accuracy of the model is at a level of 1 mm 3. Using this simulation model, the study carried out analyses of different factors, such as tissue electrical parameters and electrode configurations. The results show that factors influncing the distribution of the internal electric field of the tumor include changes in scalp and skull conductivity (with a maximum variation of 21.0% in the treatment field of the tumor), changes in tumor conductivity (with a maximum variation of 157.8% in the treatment field of the tumor), and different electrode positions and combinations (with a maximum variation of 74.2% in the treatment field of the tumor). In summary, the results of this study validate the feasibility and effectiveness of the proposed modeling method, which can provide an important reference for future simulation analyses of TTFields and clinical applications.


Assuntos
Simulação por Computador , Análise de Elementos Finitos , Neoplasias , Humanos , Neoplasias/terapia , Neoplasias/radioterapia , Eletrodos , Condutividade Elétrica , Software , Couro Cabeludo , Crânio
5.
Genes (Basel) ; 15(3)2024 Mar 21.
Artigo em Inglês | MEDLINE | ID: mdl-38540443

RESUMO

The RNA-Seq and gene expression data of mature leaves under high temperature stress of Paeonia suffruticosa 'Hu Hong' were used to explore the key genes of heat tolerance of peony. The weighted gene co-expression network analysis (WGCNA) method was used to construct the network, and the main modules and core genes of co-expression were screened according to the results of gene expression and module function enrichment analysis. According to the correlation of gene expression, the network was divided into 19 modules. By analyzing the expression patterns of each module gene, Blue, Salmon and Yellow were identified as the key modules of peony heat response related functions. GO and KEGG functional enrichment analysis was performed on the genes in the three modules and a network diagram was constructed. Based on this, two key genes PsWRKY53 (TRINITY_DN60998_c1_g2, TRINITY_DN71537_c0_g1) and PsHsfB2b (TRINITY_DN56794_c0_g1) were excavated, which may play a key role in the heat shock response of peony. The three co-expression modules and two key genes were helpful to further elucidate the heat resistance mechanism of P. suffruticosa 'Hu Hong'.


Assuntos
Paeonia , Paeonia/genética , Perfilação da Expressão Gênica , Folhas de Planta/genética , RNA-Seq
6.
PLoS One ; 19(3): e0299945, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38547197

RESUMO

To reduce financial pressure and operational risk, and improve match between supply and demand, an increasing number of enterprises are adopting presales to launch new products. In this context, this paper investigates three presale models for innovative products, namely, the no-presale model, the manufacturer presale model and the retailer presale model. A Hotelling model is used to describe the impact of channel preferences and valuation differences on the two-stage competition between innovative products. Aiming at evaluating the purchase behavior of consumers under three presale modes, a game optimization model is established to analyze the presale decision problem for innovative products under different presale entities. The research shows that: (1) Compared with no-presale, presales can help enterprises obtain more profits. The overall profit of the supply chain is optimal under the retailer presale mode. (2) When the difference in channel preferences is small, the manufacturer obtains the greatest profit by choosing the direct presale model. In contrast, the selection of different presale entities has a significant impact on product sales and supply chain enterprise profits. At this point, the manufacturer should choose the retailer presale model. (3) When the product valuation discount is high, the manufacturer can increase the spot and wholesale prices to induce consumers to choose the presale method to purchase the product. In the opposite situation, the manufacturer should lower the presale price to improve the presale utility of consumers and encourage them to participate in the presale. These conclusions provide more targeted suggestions for enterprises to formulate presale strategies, which can help them grasp market demand and improve market competitiveness.


Assuntos
Comércio , Comportamento do Consumidor , Custos e Análise de Custo
7.
Plant Dis ; 2024 Jan 24.
Artigo em Inglês | MEDLINE | ID: mdl-38268174

RESUMO

Passion fruit (Passiflora edulis), a medicinal plant, was introduced into China in the early 19th century, is mainly cultivated in southern provinces (Liang et al. 2019). During March 2023, a survey was carried out and 167 samples were taken from passion fruit cultivated area in Yulin (22.6570263°E; 110.1765019°N) apart from the planting base appeared yellow leaves, stunted growth, and distinctive galls on the roots. Within the galls, Meloidogyne sp. females and egg masses were observed. From the rhizosphere soil, second-stage juveniles (J2) were extracted, and population density was 105/500 g soil. The species was determined to be Meloidogyne enterolobii based on morphological characteristics, including female perineal pattern, and genetic analyses. Female (n = 10) perineal patterns showed oval shape, with coarse and smooth striae, dorsal arch rounded to square, and lateral lines not distinct. The male head cap was high and rounded, with the head region only slightly set off from the body, knobs large, ovoid to rounded. The measurements of males (n = 10) included body length, 1,230.7 ± 244.94 (997 to 1,569) µm; a, 38.58 ± 7.8 (33.45 to 47.05) µm; c, 113.03 ± 26.22 (80.82 to 144.23) µm; stylet, 15.68 ± 1.1 (14.5 to 17.4) µm; spicules, 31.83 ± 2.84 (28.69 to 36.1) µm; tail, 11.09 ± 1.72 (8.02 to 13.38) µm; and gubernaculum length, 8.34 ± 0.28 (8.11 to 8.98) µm. Measurements of J2 (n = 20) included body length, 455.75 ± 44.94 (381 to 512) µm; a, 26.32 ± 3.89 (18.18 to 32.70) µm; c, 8.56 ± 1.2 (6.36 to 10.80) µm; stylet, 12.44 ± 0.76 (11.2 to 13.8) µm; DGO, 3.65 ± 0.54 (2.84 to 4.68) µm; tail, 53.89 ± 6.36 (39.8 to 62.2) µm; and hyaline tail terminus, 11.77 ± 2.83 (7.14 to 16.2) µm. These morphological characteristics are similar to those reported in the original description of M. enterolobii (Yang and Eisenback 1983). The sequences of the partial ITS region was amplified with V5367 (5'-TTGATTACGTCCCTGCCCTTT-3') and 26S (5'-TTTCACTCGCCGTTACTAAGG-3') primers (Vrain et al. 1992). The region between cytochrome oxidase subunit II (COII) and the 16S rRNA mitochondrial DNA (mtDNA COII) was also amplified with the primers C2F3 (5'-GGTCAATGTTCAGAAATTTGTGG-3') (Powers and Harris 1993) and MRH106 (5'-AATTTCTAAAGACTTTTCTTAGT-3') (Stanton et al. 1997). The ITS region yielded a fragment of 757 bp (OR072957) and mtDNA COII of 706 bp (OR078415). A BLAST search indicated the sequences were 100% identical to several sequences of M. enterolobii (MT406250, MH756127 and AY831967, MN269940, respectively). To confirm pathogenicity, 20 passion fruit (P. edulis Sim. f. flavicarpa) 30-day-old seedlings were transplanted into pots with an autoclaved mixture of sand and field soil (3:1) and maintained in the glasshouse at 25 ± 2°C with 65 ± 5% relative humidity. After eight weeks, fifteen plants were inoculated with 500 J2/pot (nematode culture collected from the original field), and another five uninoculated plants served as a control. Two months later, aboveground symptoms were similar to those observed in the field. Nematode reproduction occurred and root galls were observed. The reproduction factor (nematode final population density/initial population density) was 4.8. The disease caused by M. enterolobii was severe in Yulin city of Guangxi. Guangxi is an important area for passion fruit culture, with about 2000 ha, which is responsible for two-thirds of China production (Xing et al. 2020). This is the first record of P. edulis natural infection with M. enterolobii in the Yulin City of Guangxi, China.

8.
Zhongguo Yi Liao Qi Xie Za Zhi ; 47(6): 624-629, 2023 Nov 30.
Artigo em Chinês | MEDLINE | ID: mdl-38086718

RESUMO

Anti-motion artifact is one of the most important properties of ambulatory ECG monitoring equipment. At present, there is a lack of standardized means to test the performance of anti-motion artifact. ECG simulator and special conductive leather are used to build the simulator, it is used to simulate human skin, to generate ECG signal input for the ECG monitoring equipment attached to it. The mechanical arm and fixed support are used to build a motion simulation system to fix the conductive leather. The mechanical arm is programmed to simulate various motion states of the human body, so that the ECG monitoring equipment can produce corresponding motion artifacts. The collected ECG signals are read wirelessly, observed, analyzed and compared, and the anti-motion artifact performance of ECG monitoring equipment is evaluated. The test results show that by artificially creating the small difference between the two groups of ambulatory ECG monitoring equipment, the system can accurately test the interference signals introduced under the conditions of controlled movement such as tension and torsion, and compare the advantages and disadvantages. The research shows that the test system can provide convenient and accurate verification means for the research of optimizing anti-motion interference.


Assuntos
Artefatos , Processamento de Sinais Assistido por Computador , Humanos , Eletrocardiografia Ambulatorial/métodos , Eletrocardiografia , Movimento (Física)
9.
Artigo em Inglês | MEDLINE | ID: mdl-38082713

RESUMO

Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that has been utilized for treating brain disorders and improving cognitive function. In order to achieve targeted tDCS, many optimization methods of montages and electric currents have been proposed. However, these methods have some limitations. Most of them were proposed for single-objective optimization (focality or intensity) and have no constrain with the number of electrodes (Most devices only have less than 8 electrodes currently). In this study, we proposed an operational optimization approach for well-targeted tDCS, which aims to optimize for two objectives of electric field (EF) intensity and focality with constraints on the number of electrodes. Compared with traditional tDCS in our cohort (10 subjects), our method significantly improves the EF focality. When compared to commonly used 4×1 high-definition tDCS (HD-tDCS), our method can achieve higher EF intensity in the target region with less than 8 electrodes. Our method can balance the two objectives of EF and shorten optimization time, which is convenient for practical application.


Assuntos
Estimulação Transcraniana por Corrente Contínua , Humanos , Estimulação Transcraniana por Corrente Contínua/métodos , Encéfalo/fisiologia , Cabeça , Cognição , Eletricidade
10.
iScience ; 26(9): 107664, 2023 Sep 15.
Artigo em Inglês | MEDLINE | ID: mdl-37680465

RESUMO

Marine group II (MGII) is the most abundant planktonic heterotrophic archaea in the ocean. The evolutionary history of MGII archaea is elusive. In this study, 13 new MGII metagenome-assembled genomes were recovered from surface to the hadal zone in Challenger Deep of the Mariana Trench; four of them from the deep ocean represent a novel group. The optimal growth temperature (OGT) of the common ancestor of MGII has been estimated to be at about 60°C and OGTs of MGIIc, MGIIb, and MGIIa at 47°C-50ºC, 37°C-44ºC, and 30°C-37ºC, respectively, suggesting the adaptation of these species to different temperatures during evolution. The estimated OGT range of MGIIc was supported by experimental measurements of cloned ß-galactosidase that showed optimal enzyme activity around 50°C. These results indicate that MGIIc may have originated from a common ancestor that lived in warm or even hot marine environment, such as hydrothermal vents.

11.
Adv Mater ; 35(31): e2300577, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37208182

RESUMO

High-energy electrolytic Zn//MnO2 batteries show potential for grid-scale energy storage, but the severe hydrogen evolution corrosion (HEC) caused by acidic electrolytes results in subdued durability. Here, an all-around protection strategy is reported for achieving stable Zn metal anodes. First, a proton-resistant Pb-containing (Pb and Pb(OH)2 ) interface is constructed on a Zn anode (denoted as Zn@Pb), which in situ forms PbSO4 during H2 SO4 corrosion and protects the Zn substrate from HEC. Second, to improve the plating/stripping reversibility of Zn@Pb, Pb(CH3 COO)2 an additive (denoted as Zn@Pb-Ad) is introduced, which triggers PbSO4 precipitation and releases trace Pb2+ that can dynamically deposit a Pb layer on the Zn plating layer to suppress HEC. The superior HEC resistance stems from the low affinity of PbSO4 and Pb for H+ , as well as strong bonding between Pb-Zn or Pb-Pb, which increase the hydrogen evolution reaction overpotential and the H+ corrosion energy barrier. Consequently, the Zn@Pb-Ad//MnO2 battery runs stably for 630 and 795 h in 0.2 and 0.1 m H2 SO4 electrolytes, respectively, which are >40 times better than that of bare Zn. The as-prepared A h-level battery achieves a one-month calendar life, opening the door to the next generation of high-durable grid-scale Zn batteries.

12.
Cell Rep ; 42(6): 112550, 2023 06 27.
Artigo em Inglês | MEDLINE | ID: mdl-37224018

RESUMO

Diabetic kidney disease (DKD) is the most prevalent chronic kidney disease. Macrophage infiltration in the kidney is critical for the progression of DKD. However, the underlying mechanism is far from clear. Cullin 4B (CUL4B) is the scaffold protein in CUL4B-RING E3 ligase complexes. Previous studies have shown that depletion of CUL4B in macrophages aggravates lipopolysaccharide-induced peritonitis and septic shock. In this study, using two mouse models for DKD, we demonstrate that myeloid deficiency of CUL4B alleviates diabetes-induced renal injury and fibrosis. In vivo and in vitro analyses reveal that loss of CUL4B suppresses migration, adhesion, and renal infiltration of macrophages. Mechanistically, we show that high glucose upregulates CUL4B in macrophages. CUL4B represses expression of miR-194-5p, which leads to elevated integrin α9 (ITGA9), promoting migration and adhesion. Our study suggests the CUL4B/miR-194-5p/ITGA9 axis as an important regulator for macrophage infiltration in diabetic kidneys.


Assuntos
Diabetes Mellitus , Nefropatias Diabéticas , MicroRNAs , Animais , Camundongos , Proteínas Culina/genética , Proteínas Culina/metabolismo , Diabetes Mellitus/metabolismo , Nefropatias Diabéticas/genética , Nefropatias Diabéticas/metabolismo , Cadeias alfa de Integrinas/metabolismo , Macrófagos/metabolismo , MicroRNAs/genética , MicroRNAs/metabolismo
13.
Plant Dis ; 2023 Apr 05.
Artigo em Inglês | MEDLINE | ID: mdl-37018210

RESUMO

Antirrhinum majus L. is a medicinal and ornamental herb commonly grown in China. In October 2022, A. majus plants were observed stunted in growth with yellowish leaves and containing a large number of galls on roots in a field in Nanning, Guangxi, China (N22°47'23.35″, E108°23'4.26). Ten samples were collected randomly from rhizosphere soil and roots of A. majus. Second-stage juveniles (J2) were isolated from fresh soil with a Baermann funnel, and a mean of 36 ± 2.9 per 500 cm3 of soil was recorded. Gall roots were dissected using a microscope, where 2+ 0.42 males per sample were recovered. The species was determined to be Meloidogyne enterolobii based on morphological characteristics, including the female perineal pattern, and DNA studies. Female perineal patterns and morphometric data were similar to the original description of M. enterolobii Yang and Eisenback 1983 from Enterolobium contortisilquum (Vell.) Morong in China (Yang and Eisenback 1983). The measurements of males (n = 10) included body length, 1600.7 ± 55.32 (1421.3 to 1924.3) µm; body diameter = 41.3 ± 0.80 (37.8 to 45.4) µm, stylt length = 20.5 ± 0.40 (19.1 to 22.2) µm, spicules length = 30.0 ± 0.47 (28.2 to 32.0) µm and DGO = 4.5 ± 0.3 (3.8 to 5.2) µm. Measurements of J2 (n = 20) included body length, 441.9 ± 5.42 (403.2 to 493.3) µm; body diameter = 16.6 ± 0.30 (14.4 to 8.7) µm, a = 26.8 ± 0.54 (21.9 to 31.2), c = 8.7 ± 0.27 (6.4 to 10.8), stylet length = 12.6 ± 0.17 (11.2 to 14.3) µm, DGO = 3.8 ± 0.10 (2.9 to 4.8) µm, tail length = 51.6 ± 1.27 (42.3 to 63.1) µm and hyaline tail terminus length = 11.7 ± 0.15 (10.2 to 13.1) µm. These morphological characteristics are similar to the original description of M. enterolobii (Yang and Eisenback 1983). Pathogenicity tests were conducted on A. majus 'Taxiti' plants directly germinated from seeds in a 10.5-cm-diameter pot filled with 600 ml of sterilized peat moss/sand (1:1, v/v) soil in the glasshouse. After 1 week, fifteen plants were inoculated with 500 J2/pot (nematode culture collected from the original field) and five uninoculated plants served as a control. After 45 days, aboveground parts of all inoculated plants showed symptoms similar to those observed in the field. No symptoms were observed on control plants. The RF value of the inoculated plants was determined by the method of Belair and Benoit (1996) 60 days after inoculation, and the average was 14.65. J2 were used in this test and sequenced on 28S rRNA-D2/D3, ITS, COII -16SrRNA 3 region and confirmed to be M. enterolobii. Species identification was confirmed by using polymerase chain reaction primers D2A/D3B (De Ley et al. 1999), F194/5368r (Ferris et al. 1993), C2F3/1108 (Powers and Harris, 1993). The sequences obtained GenBank accession numbers OP897743 (COII), OP876758 (rRNA) and OP876759 (ITS) were 100% similar to other M. enterolobii populations from China (MN269947), (MN648519) and (MT406251). M. enterolobii is a highly pathogenic species and has been reported in vegetables, ornamental plants, guava (Psidium guajava L.), and weeds in China, Africa and America (Brito et al. 2004; Xu et al. 2004; Yang and Eisenback 1983). The medicinal plant Gardenia jasminoides J. Ellis was also infected by M. enterolobii in China (Lu et al. 2019). Of concern is its ability to develop on crop genotypes carrying RKN resistance genes in tobacco (Nicotiana tabacum L.), tomato (Solanum lycopersicum L.), soybean (Glycine max (L.) Merr.), potato (Solanum tuberosum L.), cowpea (Vigna unguiculata (L.) Walp.), sweetpotato (Ipomoea batatas (L.) Lam.), and cotton (Gossypium hirsutum L.). Consequently, this species was added to the European and Mediterranean Plant Protection Organization A2 Alert List in 2010. This is the first natural infection report of M. enterolobii in Guangxi, China on the medicinal and ornamental herb A. majus. Acknowledgments This research was funded by the National Natural Science Foundation of China (31860492), Natural Science Foundation of Guangxi (2020GXNSFAA297076), and Guangxi Academy of Agricultural Sciences Fund, China (2021YT062, 2021JM14, 2021ZX24). References: Azevedo de Oliveira, S., et al. 2018. PLoS One 13:e0192397. Belair, G., and Benoit, D. L. 1996. J. Nematol. 28:643. Brito, J. A., et al. 2004. J. Nematol. 36:324. De Ley, P., et al. 1999. Nematol. 1:591-612. Ferris, V. R., et al. 1993. Fundam. Appl. Nematol. 16:177-184. Lu, X. H., et al. 2019. Plant Dis. 103:1434. Powers, T. O. and Harris, T. S. 1993. J. Nematol. 25:1-6 Vrain, T. C., et al. 1992. Fundam. Appl. Nematol. 15:563. Yang, B. and Eisenback, J. D. 1983. J. Nematol. 15:381.

14.
Cell Death Differ ; 30(6): 1488-1502, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-37024604

RESUMO

CD4+ T helper (Th) cell differentiation is regulated by lineage-specific expression of transcription factors, which is tightly associated with epigenetic modifications, including histone acetylation and methylation. However, the factors regulating histone modifications involved in Th cell differentiation remain largely unknown. We herein demonstrated a critical role of Cullin 4B (CUL4B) in restricting Th1 and Th2 cell differentiation. CUL4B, which is assembled into the CUL4B-RING E3 ligase (CRL4B) complex, participates in various physiological and developmental processes through epigenetic repression of transcription. Depletion of Cul4b in CD4+ T cells enhanced Th1 and Th2 cell differentiation. In vivo, an aggravated Th2 response caused by the absence of CUL4B was observed in a murine asthma model. Mechanistically, the CRL4B complex promoted monoubiquitination at H2AK119 (H2AK119ub1) and polycomb repressive complex 2 (PRC2)-mediated trimethylation at H3K27 (H3K27me3) at Tbx21 and Maf and consequently repressed their expression during Th cell differentiation. Our study suggests that CRL4B complex-mediated H2AK119ub1 deposition functions to prevent the aberrant expression of Th1 and Th2 lineage-specific genes.


Assuntos
Epigênese Genética , Complexo Repressor Polycomb 2 , Animais , Camundongos , Ubiquitinação , Metilação , Diferenciação Celular , Complexo Repressor Polycomb 2/metabolismo
15.
Cancer Med ; 12(4): 3987-3998, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36106610

RESUMO

BACKGROUND: This study aimed to better characterize the clinicopathologic characteristics, outcomes, and prognostic factors of AITL in China. METHODS: We retrospectively analyzed 312 patients with AITL enrolled between January 2011 and December 2020 from five institutions in China. RESULTS: The median age was 65 years, with 92.6% advanced stage, 59.7% elevated LDH, 46.1% anemia, and 44.0% hypergammaglobulinemia. The majority of patients (84.9%) received anthracycline-based regimens with or without etoposide, and only 6.1% underwent autologous stem cell transplantation following first remission. The 5-year OS and PFS estimates were 43.4% and 25.0% with no significant improvement of survival between patients treated during 2011-2015 and 2016-2020, respectively. Both the International Prognostic Index (IPI) and the prognostic index for PTCL, not otherwise specified (PIT), were predictive for OS. In multivariate analysis, age >70 years, elevated LDH, and albumin level <35 g/L were independent prognostic factors for OS. Combining these three factors, a novel prognostic model (the Chinese AITL score) was constructed, which stratified patients into low-, intermediate-, and high-risk groups, with 5-year OS rates of 69.0%, 41.5%, and 23.7%, respectively. This new model was successfully validated in an independent cohort. CONCLUSIONS: Patients with AITL were mainly treated with anthracycline-based regimens, and the outcomes were still unsatisfactory in China. Our novel prognostic model may improve our ability to identify patients at different risks for alternative therapies.


Assuntos
Transplante de Células-Tronco Hematopoéticas , Linfadenopatia Imunoblástica , Linfoma de Células T Periférico , Humanos , Idoso , Prognóstico , Estudos Retrospectivos , Transplante Autólogo , Linfadenopatia Imunoblástica/terapia , Antraciclinas/uso terapêutico
16.
Sci Bull (Beijing) ; 67(9): 955-962, 2022 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-36546030

RESUMO

Aqueous zinc-ion batteries (ZIBs) are perceived as one of the most upcoming grid-scale storage systems. However, the issues of electrode dissolution, dendrite formation, and corrosion in traditional liquid electrolytes have plagued its progress. In this work, Zn dendrite growth and side reactions are effectively suppressed by a highly-confined tannic acid (TA) modified sodium alginate (SA) composite gel electrolyte (TA-SA). The ion-confinement effect is enhanced by divalent zinc ions coordinated with carboxyl groups and chelated with phenolic hydroxyl groups, thus guiding and regulating Zn deposition to achieve steady zinc plating/stripping behavior. As a consequence, the Zn/TA-SA/NH4V4O10 full cells deliver a high specific capacity of 238.6 mAh g-1 and maintain 94.51% over 900 cycles at 2 A g-1. Notably, after resting over 5 d, the capacity can be stabilized with a capacity retention of 97.25% after 200 cycles at 2 A g-1. This highly-confined and hydrogen bond-strengthened gel electrolyte may provide an effective strategy for the future development of quasi-solid-state metal batteries.

17.
Adv Mater ; 34(40): e2204681, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-35951631

RESUMO

The solid-liquid transition reaction lays the foundation of electrochemical energy storage systems with high capacity, but realizing high efficiency remains a challenge. Herein, in terms of thermodynamics and dynamics, this work demonstrates the significant role of both interfacial H+ concentration and Mn2+ migration steric hindrance for the high-efficiency deposition/dissolution chemistry of zinc-manganese batteries. Specially, the introduction of formate anions can buffer the generated interfacial H+ to stabilize interfacial potential according to the Nernst equation, which stimulates high capacity. Compared with acetate and propionate anions, the formate anion also provides high adsorption density on the cathode surface to shield the electrostatic repulsion due to the small spatial hindrance. Particularly for the solvated Mn2+ , the formate-anion-induced lower energy barrier of the rate-determining step during the step-by-step desolvation process results in lower polarization and higher electrochemical reversibility. In situ tests and theoretical calculations verify that the electrolyte with formate anions achieve a good balance between ion concentration and ion-migration steric hindrance. It exhibits both the high energy density of 531.26 W h kg-1  and long cycle life of more than 300 cycles without obvious decay.

18.
ChemSusChem ; 15(10): e202200348, 2022 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-35297217

RESUMO

Aqueous Mn2+ /MnO2 -based batteries have attracted enormous attentions in aqueous energy storage fields, owing to their high working voltage and theoretical capacity (616 mAh g-1 ) brought by the two-electron reaction (Mn2+ /Mn4+ ). However, there are currently several tricky challenges facing Mn2+ /MnO2 -based batteries: their complicated working mechanisms, existing issues, and optimization strategies. This Perspective aims to provide a mechanistic understanding and an overview of the insufficiency, optimization, and future development for Mn2+ /MnO2 -based batteries. The existing issues and deficiency in Mn2+ /MnO2 -based batteries have been systematically analyzed, and optimization strategies have also been rationally summarized and discussed with deep insights. Also, the often-overlooked optimized objects and aspects have been highlighted with unique perspectives. The proposals of testing methods and performance assessment are presented, containing different degradation mechanisms. Based on the above points, this Perspective will provide guidance and contribute to the further development of aqueous Mn2+ /MnO2 -based batteries.


Assuntos
Compostos de Manganês , Óxidos , Fontes de Energia Elétrica
19.
Onco Targets Ther ; 15: 1-11, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35023929

RESUMO

Primary central nervous system extranodal natural killer/T-cell lymphoma (PCNS ENK/TCL) is an extremely rare lymphoma. Only 23 cases of PCNS ENK/TCL have been reported in the English literature. Due to the rarity of this lymphoma, an effective therapeutic strategy has not been defined. Generally, this type of lymphoma is treated with surgery, intrathecal chemotherapy, and postoperative chemoradiation therapy. The prognosis is poor. Herein, we present a case of primary brain NK/T cell lymphoma in a 50-year-old immunocompetent Chinese female and review the literature. The patient underwent intracranial tumor resection and was subsequently treated with a PD1 monoclonal antibody (Sintilimab) combined with chemotherapy. The patient survived 15 months after diagnosis. This is the first report of PCNS ENK/TCL treated with surgery and chemotherapy combined with immunotherapy and suggests an effective treatment regimen for PCNS ENK/TCL.

20.
Mol Metab ; 56: 101423, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-34954108

RESUMO

OBJECTIVE: Genome-wide association studies identified ORMDL3 as an obesity-related gene, and its expression was negatively correlated with body mass index. However, the precise biological roles of ORMDL3 in obesity and lipid metabolism remain uncharacterized. Here, we investigate the function of ORMDL3 in adipose tissue thermogenesis and high fat diet (HFD)-induced insulin resistance. METHODS: Ormdl3-deficient (Ormdl3-/-) mice were employed to delineate the function of ORMDL3 in brown adipose tissue (BAT) thermogenesis and white adipose tissue (WAT) browning. Glucose and lipid homeostasis in Ormdl3-/- mice fed a HFD were assessed. The lipid composition in adipose tissue was evaluated by mass spectrometry. Primary adipocytes in culture were used to determine the mechanism by which ORMDL3 regulates white adipose browning. RESULTS: BAT thermogenesis and WAT browning were significantly impaired in Ormdl3-/- mice upon cold exposure or administration with the ß3 adrenergic agonist. In addition, compared to WT mice, Ormdl3-/- mice displayed increased weight gain and insulin resistance in response to HFD. The induction of uncoupling protein 1 (UCP1), a marker of thermogenesis, was attenuated in primary adipocytes derived from Ormdl3-/- mice. Importantly, ceramide levels were elevated in the adipose tissue of Ormdl3-/- mice. In addition, the reduction in thermogenesis and increase in body weight caused by Ormdl3 deficiency could be rescued by inhibiting the production of ceramides. CONCLUSION: Our findings suggest that ORMDL3 contributes to the regulation of BAT thermogenesis, WAT browning, and insulin resistance.


Assuntos
Tecido Adiposo Marrom , Ceramidas , Resistência à Insulina , Proteínas de Membrana , Termogênese , Tecido Adiposo Marrom/metabolismo , Tecido Adiposo Branco/metabolismo , Animais , Ceramidas/biossíntese , Metabolismo Energético , Estudo de Associação Genômica Ampla , Proteínas de Membrana/genética , Proteínas de Membrana/metabolismo , Camundongos , Camundongos Knockout
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