INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2012
·Vol. 13
·期 5
·5818-5831
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IF 2.598
Kun Liu,Feng Liu,Nannan Zhang,Shiying Liu,Yuyang Jiang
Pokemon is an important proto-oncogene that plays a critical role in cellular oncogenic transformation and tumorigenesis. Anoikis, which is regulated by Bim-mediated apoptosis, is critical to cancer cell invasion and metastasis. We investigated the role of Pokemon in anoikis, and our results show that Pokemon renders liver cells resistant to anoikis via suppression of Bim transcription. We knocked-down Pokemon in human hepatoma cells QGY7703 with small interfering RNAs (siRNA). Knockdown of Pokemon alone did not significantly affect the growth and survival of QGY7703 cells but notably enhanced their sensitivity to apoptotic stress due to the presence of chemical agents or cell detachment, thereby inducing anoikis, as evidenced by flow cytometry and caspase-3 activity assays. In contrast, ectopic expression of Pokemon in HL7702 cells led to resistance to anoikis. Dual-luciferase reporter and ChIP assays illustrated that Pokemon suppressed Bim transcription via direct binding to its promoter. Our results suggest that Pokemon prevents anoikis through the suppression of Bim expression, which facilitates tumor cell invasion and metastasis. This Pokemon-Bim pathway may be an effective target for therapeutic intervention for cancer.Keywords:Pokemon;anoikis;Bim;hepatoma
研究领域:
肿瘤学
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分子生物学
·
细胞生物学
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DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2016
·Vol. 19
·期 4
·937-945
·
IF 8.506
Dawei Shang,Xiangping Zhang,Shaojuan Zeng,Kun Jiang,Hongshuai Gao,Haifeng Dong,Qingyuan Yang,Suojiang Zhang
Cost-efficient and environmentally benign treatment of NH3-containing exhaust gas has been a challenge. Ionic liquids (ILs) due to their unique structures and properties are recognized as potential solvents to absorb NH3. In this study, three types of ILs, including [Bmim][NTf2], [Bim][NTf2], [HOOC(CH2)3mim][NTf2], were designed and synthesized with various hydrogen bond donating abilities and characterized based on their thermodynamic dissociation constants (pKa). The results showed that protic ionic liquid (PIL) [Bim][NTf2] with a moderate pKa value had the highest NH3 absorption capacity (up to 2.69 mol NH3 per mol IL, 313 K, 100 kPa). Experimental characterization and theoretical calculations verified that such extremely high NH3 absorption capacity for [Bim][NTf2] resulted from the interactions between H-3 on the imidazole ring and the NH3 molecule and NH3 molecules sintering themselves. Furthermore, stable absorption performance was recorded for [Bim][NTf2] over four cycles, implying potential applications in the industry for NH3 recycling.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2020
·Vol. 34
·期 11
·e5950
·
IF 3.14
Fei-Fei Wang,Zan Liu,Zhi-Lin Cheng
The interface issue of two-dimensional (2D) nanomaterials has seriously restricted their applications in the past. To date, there have been few reports on the friction behavior of 2D MOFs. Herein, 2D Zn(Bim)(OAc) metal–organic framework structure nanosheets with a thickness of ca. 4 nm were successfully prepared via convenient ultrasonic-assisted exfoliation in solvents. For the first time, we probed the dispersion performance of the as-obtained 2D Zn(Bim)(OAc) in different oils, and intensively investigated the tribological behavior. The results indicated that the as-obtained 2D Zn(Bim)(OAc) used as an additive showed the preferable friction reducing performance and wear resistance in liquid paraffin, and showed the better dispersivity in glycerol.
研究领域:
材料科学
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化学工程
·
机械工程
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产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 23
·12503-12516
·
IF 2.936
Ping Li,Bing Qi,Kun Li,Junwei Xu,Meili Liu,Xuenan Gu,Xufeng Niu,Yubo Fan
Besides the particle size and surface performance, the shape also plays a key role in drug delivery systems. Red blood cells are the most abundant blood cells in the human body, and are excellent oxygen carriers, due to their unique biconcave discoid shape. In this study, red blood cell (RBC)-like Fe3O4/TbLa3(Bim)12/poly(lactic-co-glycolic acid) (PLGA) composite particles, with magnetic response and bioimaging functions, were prepared by electrospraying. Various electrospraying parameters, such as solvent, PLGA concentration, collecting distance and solution flow rate were investigated in detail to attempt to obtain RBC-like composite particles. The size distribution, morphology, structure, and hydrophobicity–hydrophilicity of particles were characterized. The results revealed the RBC-like Fe3O4/TbLa3(Bim)12/PLGA composite particles exhibited a strong green fluorescence and good magnetic behavior even when incubated with cells. Furthermore, the intensity of the magnetization and fluorescence can be adjusted by changing the contents of Fe3O4 and TbLa3(Bim)12. The effect on cell viability of the RBC-like Fe3O4/TbLa3(Bim)12/PLGA composite particles was evaluated in A549 cells and RBCs, and it was determined to have low cytotoxicity and excellent blood biocompatibility, suggesting that it is a promising candidate for application in drug delivery, targeting and tracking.
研究领域:
材料科学
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纳米技术
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生物医学工程
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药学
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产品关联
DOI
PubMed
高影响因子
ARCHIVES OF DERMATOLOGICAL RESEARCH
·
2025
·Vol. 317
·期 1
·1-16
·
IF 2.1
Lin Ling,Li Wei,Gao Xinjing,Li Qian,Zhou Xin,Liu Weiyu,Zhong Xuelian,Yang Yunqing,Zhang Xibao,Luo Quan
Psoriasis represents a chronic inflammatory skin disease occurring globally. We investigated the role of plasma exosomal microRNA (miR)- 148a- 3p and its target gene Bim in psoriasis. Plasma exosomes (Exos) and CD4 + T cells were extracted from psoriatic patients. miR- 148a- 3p expression in Exos and CD4 + T cells of psoriatic patients, the proportions of CD4 + T cell subsets, and the contents of anti-inflammatory/pro-inflammatory factors were determined by RT-qPCR, flow cytometry and ELISA. The correlation between plasma exosomal miR- 148a- 3p and CD4 + T cell subsets in psoriatic patients was analyzed by Pearson’s analysis. The psoriatic mouse was treated with Exos/antagomir miR- 148a- 3p. Histopathological changes in the skin were observed. The CD4 + T cell subset levels, serum cytokine contents and miR- 148a- 3p expression in the blood were measured. The miR- 148a- 3p-Bim targeted binding relationship was predicted and verified by Starbase database and dual-luciferase assay. The Bim expression in psoriatic mice was determined. Psoriatic patients had highly-expressed miR- 148a- 3p in both Exos and CD4 + T cells, and abnormal CD4 + T cell subsets and cytokine levels. Plasma exosomal miR- 148a- 3p was correlated with the CD4 + T cell subsets in psoriatic patients. Exos caused down-regulated miR- 148a- 3p level in skin tissues of mouse, regulated CD4 + T cell function and aggravated the symptoms in psoriatic mice. miR- 148a- 3p repression partially reversed the role of Exos in CD4 + T cell function and psoriasis-like symptoms. Exos-carried miR- 148a- 3p targeted Bim in CD4 + T cells of psoriatic mice. Plasma exosomal miR- 148a- 3p targeted Bim to affect the dysfunction of CD4 + T cells in psoriatic mice, thereby aggravating the psoriasis-like symptoms.
研究领域:
皮肤病学
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分子生物学
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免疫学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Qian Wu,Xinping He,Chenyi Cui,Chenchen Jiao,Baojin Qi,Jinjia Wei
Mixed matrix membranes (MMMs) incorporating metal–organic frameworks (MOFs) hold significant promise for gas separation applications. However, the inherent disparity between the organic polymer matrix and the inorganic fillers frequently leads to interfacial incompatibility issues. In this study, we adopted an in-situ interfacial crosslinking strategy to fabricate MMMs incorporating NH 2 -Zn 2 (Bim) 4 nanosheets that simultaneously act as nanofillers and reactive crosslinkers. Specifically, during the thermal imidization reaction process, the amino groups of NH 2 -Zn 2 (Bim) 4 not only establish hydrogen bonding interactions with the carbonyl groups of polyamic acid (PAA) (the precursor of polyimide), but undergo dehydration reactions with carboxyl groups, leading to the formation of stable amide linkages. Meanwhile, the aromatic structure of the BI units, a key monomer of polyimide, closely resembles that of the ligands of NH 2 -Zn 2 (Bim) 4 , which can establish π-π stacking interactions, further improving the interfacial compatibility between the polymer matrix and MOF fillers. Among the prepared samples, MMMs incorporating 33.3 wt% NH 2 -Zn 2 (Bim) 4 nanosheets exhibit the maximum H 2 permeability of 680.5 Barrer, and its H 2 /N 2 and H 2 /CO 2 selectivities were 18.7 and 13.3, respectively, which were close to or even exceeded the Robeson upper bound. The proposed in-situ interfacial engineering based on chemical crosslinking provides a novel and effective route for fabricating high-performance MMMs with enhanced interfacial compatibility, demonstrating great potential for hydrogen separation applications.
研究领域:
材料科学
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膜技术
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气体分离
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化学工程
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纳米复合材料
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DOI
高影响因子
BIOSCIENCE REPORTS
·
2019
·Vol. 39
·期 1
·
IF 2.535
Chen Gang,Chen Weicheng,Ye Ming,Tan Weiqiang,Jia Bing
Neuroblastoma is the most common tumor in children, with a very poor prognosis. It is urgent to identify novel biomarkers to treat neuroblastoma, together with surgery, chemotherapy, and radiation. Human tripartite motif 59 (TRIM59), a member of the TRIM family, has been reported to participate in several human tumors. However, the exact role of TRIM59 in neuroblastoma is unknown. In the present study, real-time PCR and Western blot were used to measure mRNA and protein levels of TRIM59 in four neuroblastoma cell lines and in neuroblastoma tissues. Lentiviruses targeting TRIM59 were used to up/down-regulate TRIM59 expression levels. Cell Counting Kit-8 and Annexin-V/PI were used to analyze cell proliferation and apoptosis in neuroblastoma cell lines. Our data showed that TRIM59 knockdown inhibits cell proliferation while inducing apoptosis in SH-SY5Y and SK-N-SH neuroblastoma cell lines. TRIM59 knockdown up-regulated expression of Bax and Bim and down-regulated levels of Survivin, β-catenin, and c-myc. Interestingly, the inhibition of cell proliferation caused by TRIM59 knockdown could be blocked by LiCl, which is an agonist of Wnt/β-catenin signaling pathway. In contrast, TRIM59 overexpression could increase cell proliferation, up-regulate Survivin, β-catenin and c-myc, down-regulate Bax and Bim, and these effects could be blocked by XAV939, which is an inhibitor of Wnt/β-catenin signaling pathway. In addition, TRIM59 was up-regulated and positively related with β-catenin in neuroblastoma tissues. In conclusion, TRIM59 was up-regulated in neuroblastoma, and TRIM59 knockdown inhibited cell proliferation by down-regulating the Wnt/β-catenin signaling pathway in neuroblastoma.
研究领域:
肿瘤学
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细胞生物学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2026
·
IF 8.2
Xinru Yan,Xianqiang Pei,Yan Wang,Leyu Lin,Yaoming Zhang,Qihua Wang,Shanhong Wan
The development of high-performance polymer composites—combining strength, low friction, and wear resistance—remains an industrial challenge. In the present study, zeolite imidazolate framework ZIF-62 served as a multifunctional filler to fabricate ZIF-62/PEEK composites via fused deposition modeling (FDM). The effects of ZIF-62 on PEEK’s friction and wear were systematically investigated. By modulating the Im/BIm molar ratio in ZIF-62, we controlled the kinetics and composition of interfacial transfer film formation during sliding, thereby enhancing PEEK’s tribological performance. The optimal composition (ZIF-62/PEEK with Zn:Im:BIm = 1:1.5:0.5) reduced PEEK’s wear rate by 90 % to 1.45 × 10 ⁻⁶ mm 3 /Nm under 4 MPa × 0.25 m/s. The mechanisms behind this improvement were discussed based on multiscale characterization and molecular dynamics simulations. It was revealed that Zn species were released through the breakage of Zn–N bonds and reacted with degraded PEEK to form ZnO, while simultaneously inducing tribo-catalyzed graphitization. These products combined with iron oxides from the counterface to form a robust transfer film. This work establishes ligand engineering as a strategy for designing next-generation PEEK tribomaterials.
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DOI
高影响因子
JOURNAL OF MATERIALS RESEARCH
·
2023
·Vol. 38
·期 11
·2943-2957
·
IF 2.7
Sun Xiaoqin,Wang Tianyu,Yun Sining
Aurivillius phases with narrow band gaps have attracted extensive interest in the field of photocatalysis, however, they exhibit poor activity due to the low utilization of photogenerated carriers. Herein, a series of S-scheme C3N4@Bi m+1 Fe m-3 Ti 3 O 3m+3 (m = 4, 5, 6) heterojunctions with two-dimensional structures were synthesized by simple two-step method. Compared with single materials, the composites exhibit excellent photocatalytic tetracycline degradation under visible light, and 91.8% of tetracycline can be degraded accompanied with 81.2% of TOC removal within 120 min over C 3 N 4 @Bi 5 FeTi 3 O 15 . The enhanced photocatalytic performance is due to strong interface interaction, high conductivity, and efficient charge separation ability. The mechanism analysis indicates that the C 3 N 4 @Bi 5 FeTi 3 O 15 heterojunction follows an S-scheme heterojunction mechanism with a strong interfacial internal electric field directed from C 3 N 4 to Bi 5 FeTi 3 O 15 , thus, the photogenerated electrons in Bi 5 FeTi 3 O 15 move toward C 3 N 4 , which retains high oxidation ability of Bi 5 FeTi 3 O 15 and high reduction ability of C 3 N 4 to efficiently produce the reactive species, such as O 2 − · and ·OH.
Graphical Abstract
研究领域:
光催化
·
材料科学
·
环境科学
·
化学
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产品关联
DOI
高影响因子
Cell Metabolism
·
2023
·
IF 29
Qianmin Ou,Xinhua Qiao,Zhengshi Li,Luhan Niu,Fangcao Lei,Ruifeng Cheng,Ting Xie,Ning Yang,Yao Liu,Ling Fu,Jing Yang,Xueli Mao,Xiaoxing Kou,Chang Chen,Songtao Shi
Summary Over 50 billion cells undergo apoptosis each day in an adult human to maintain immune homeostasis. Hydrogen sulfide (H 2 S) is also required to safeguard the function of immune response. However, it is unknown whether apoptosis regulates H 2 S production. Here, we show that apoptosis-deficient MRL/ lpr (B6.MRL-Faslpr/J) and Bim −/− (B6.129S1-Bcl2l11tm1.1Ast/J) mice exhibit significantly reduced H 2 S levels along with aberrant differentiation of Th17 cells, which can be rescued by the additional H 2 S. Moreover, apoptotic cells and vesicles (apoVs) express key H 2 S-generating enzymes and generate a significant amount of H 2 S, indicating that apoptotic metabolism is an important source of H 2 S. Mechanistically, H 2 S sulfhydrates selenoprotein F (Sep15) to promote signal transducer and activator of transcription 1 (STAT1) phosphorylation and suppress STAT3 phosphorylation, leading to the inhibition of Th17 cell differentiation. Taken together, this study reveals a previously unknown role of apoptosis in maintaining H 2 S homeostasis and the unique role of H 2 S in regulating Th17 cell differentiation via sulfhydration of Sep15 C38 .
研究领域:
免疫学
·
细胞生物学
·
生物化学
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DOI
PubMed
高影响因子
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