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Chronic niacin overload may be involved in the increased prevalence of obesity in US children

World Journal of Gastroenterology 2010年第19期16卷 2378-2387页

作者： Li, Da Sun, Wu-Ping Zhou, Yi-Ming Liu, Qi-Gui Zhou, Shi-Sheng Luo, ning bian, fu-ning Zhao, Zhi-Gang Guo, Ming Dalian Univ Coll Med Inst Basic Med Sci Dalian 116622 Liaoning Peoples R China Natl Inst Nat Sci Okazaki Inst Integrat Biosci Okazaki Aichi 8787 Japan Dalian Med Univ Dept Hlth Stat Dalian 116044 Liaoning Peoples R China PLA 210 Hosp Dept Nucl Med Dalian 116021 Liaoning Peoples R China Dalian Univ Coll Environm & Chem Engn Dalian 116622 Liaoning Peoples R China

AIM: To investigate nicotinamide’s action on glucose metabolism, and the association between niacin consumption and obesity prevalence. METHODS: Dynamic nicotinamide’s effect on plasma hydrogen peroxide and glucose metabolism was in- vestigated using oral glucose tolerance tests with or without nicotinamide in the same five healthy ***-regression analysis was used to examine the association between the niacin consumption and the obesity prevalence among US children using the data from the Economic Research Service of the US Department of Agriculture and from US Centers for Disease Control and Prevention, respectively. RESULTS: Compared with the control oral glucose tolerance test, the 1-h plasma hydrogen peroxide (1.4 ± 0.1 μmol/L vs 1.6 ± 0.1 μmol/L, P = 0.016) and insulin levels (247.1 ± 129.0 pmol/L vs 452.6 ± 181.8 pmol/L, P = 0.028) were signif icantly higher, and the 3-h blood glucose was signif icantly lower (5.8 ± 1.2 mmol/L vs 4.5 ± 1.1 mmol/L, P = 0.002) after coadministration of glucose and 300 mg nicotinamide. The obesity prevalence among American children increased with the increasing per capita niacin consumption, the increasing grain contribution to niacin due to niacin-fortification, and the increasing niacin-fortified ready-to-eat cereal consumption, with a 10-year lag. The regression analyses showed that the obesity prevalence in the US children of all age groups was determined by niacin consumption (R2 = 0.814, 0.961 and 0.94 for 2-5 years, 6-11 years and 12-19 years age groups, respectively). CONCLUSION: The appetite-stimulating effect of nicotinamide appears to involve oxidative stress. Excess niacin consumption may be a major factor in the increased obesity prevalence in US children.

关键词： Obesity Diabetes Niacin Nicotinamide

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ImSpiRE: image feature-aided spatial resolution enhancement method

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Science China Life Sciences 2025年第1期68卷 272-283页

作者： Yuwei Hua Yizhi Zhang Zhenming Guo Shan bian Yong Zhang State Key Laboratory of Cardiovascular Diseases and Medical Innovation Center Institute for Regenerative MedicineDepartment of NeurosurgeryShanghai East HospitalShanghai Key Laboratory of Signaling and Disease ResearchFrontier Science Center for Stem Cell ResearchSchool of Life Sciences and TechnologyTongji University

The resolution of most spatially resolved transcriptomic technologies usually cannot attain the single-cell level, limiting their applications in biological discoveries. Here, we introduce ImSpiRE, an image feature-aided spatial resolution enhancement method for in situ capturing spatial transcriptome. Taking the information stored in histological images, ImSpiRE solves an optimal transport problem to redistribute the expression profiles of spots to construct new transcriptional profiles with enhanced resolution, together with extending the gene expression profiles into unmeasured regions. Applications to multiple datasets confirm that ImSpiRE can enhance spatial resolution to the subspot level while contributing to the discovery of tissue domains, signaling communication patterns, and spatiotemporal characterization.

关键词： spatial transcriptome histological images spatial resolution enhancement

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多重PCR在快速检测常见假丝酵母菌中的应用

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中国卫生检验杂志 2014年第22期24卷 3247-3250页

作者：吴媛陈霞车洁边富宁李文革卢金星中国疾病预防控制中心传染病所北京102206 首都医科大学附属复兴医院北京100038

目的建立临床常见感染假丝酵母菌多重PCR快速检测法。方法根据假丝酵母菌r DNA序列,设计光滑假丝酵母、白念假丝酵母和近平滑假丝酵母的种特异性引物,并应用真菌通用引物ITS1和ITS4,以白念假丝酵母、光滑假丝酵母、热带假丝酵母、克柔... 详细信息

目的建立临床常见感染假丝酵母菌多重PCR快速检测法。方法根据假丝酵母菌r DNA序列,设计光滑假丝酵母、白念假丝酵母和近平滑假丝酵母的种特异性引物,并应用真菌通用引物ITS1和ITS4,以白念假丝酵母、光滑假丝酵母、热带假丝酵母、克柔假丝酵母、近平滑和季也蒙假丝酵母共6种菌的DNA为模板,进行多重PCR,2%琼脂糖凝胶电泳检测结果。大肠杆菌,金黄色葡萄球菌和铜绿假单胞菌为阴性对照。同一PCR反应均重复2次。实验室保存的77株假丝酵母菌(25株白念假丝酵母,15株光滑假丝酵母,15株热带假丝酵母,8株克柔假丝酵母,8株近平滑假丝酵母,6株季也蒙假丝酵母)检测其重复性和稳定性。结果得到3条种特异性引物,扩增出种特异性条带和ITS区域片段。重复2次均得出同样大小的产物片段。阴性对照均未扩增出条带。结论该方法能快速准确检测6种常见感染的假丝酵母菌,具有高特异性。与传统培养方法相比,提高了非白假丝酵母鉴定的准确性,缩短了检测时间,具有一定的临床应用价值。

关键词：多重引物聚合酶链式反应假丝酵母菌快速检测

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Cobalamin-dependent radical S-adenosyl-L-methionine protein functions with a partner to successively methylate tricyclic indole alkaloid for chuangxinmycin maturation and derivatization

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Science China Chemistry 2025年第1期68卷 308-316页

作者： Sili Wang Jiancheng Huang Yanan Du Wei Huang Yufeng Xue Xiaokun Xu Guannan Zhong Yuanyuan Shi Bin Hong Xiaoying bian Wen Liu State Key Laboratory of Chemical Biology Shanghai Institute of Organic Chemistry University of Chinese Academy of SciencesChinese Academy of Sciences State Key Laboratory of Microbial Technology Shandong University National Health Commission (NHC) Key Laboratory of Biotechnology for Microbial Drugs Institute of Medicinal BiotechnologyChinese Academy of Medical Science & Peking Union Medical College

Cobalamin(Cbl)-dependent radical S-adenosyl-L-methionine(SAM) proteins constitute the largest collection of the radical SAM superfamily that has hundreds of thousands of individual members. Many of these proteins are involved in the biosynthesis of pharmaceutically important natural products to catalyze chemically demanding reactions. In the biosynthetic pathway of chuangxinmycin(CXM), a unique indole alkaloid antibiotic with potent anti-infective activity, functionalization of the characteristic thiopyrano[4,3,2-cd]indole scaffold by regio-and stereoselective C3-methylation is believed to rely on a Cbl-dependent radical process, which, however, remained to be reconstituted biochemically. We here report the dissection of this enzymatic process, which requires the incorporation of Cxm8, a Cbl-dependent radical SAM protein, with Cxm9, a DUF5825family protein that shares no homology to any proteins of known functions. Cxm8 and Cxm9 function together by forming an unexpected heterodimeric complex that selectively catalyzes C3-methylation of the tricyclic indole-S-hetero ring system in a successive manner, achieving CXM and a recently identified, C3-dimethylated congener. Detailed biochemical characterization,isotope labeling, structural simulation and bioinformatics analysis rationalized the catalysis of the Cxm8/Cxm9 complex and particularly the necessity of the DUF5825 protein for C3-methylase activity. This is the first example that a Cbl-dependent protein acts with a partner to exhibit radical SAM activity.

关键词： cbl-dependent radical SAM protein biosynthesis chuangxinmycin stereoselective methylation

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简易高效的小鼠肝再生模型的建立

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四川动物 2012年第1期31卷 132-134,138,F0003页

作者：汤莉杨超尹蕾边富宁王晓璐高智勇王爱国大连大学医学院辽宁大连116622 大连医科大学实验动物中心辽宁大连116044

目的建立一种简易、高效的小鼠2/3肝切除方法。方法取3月龄健康昆明小鼠,进行肝顺次结扎切除手术,观察术后小鼠生存和肝组织再生状况。结果通过顺次结扎切除左小叶和中央小叶,可在15min内完成小鼠2/3肝脏切除手术,术后成活率为90%,术后... 详细信息

目的建立一种简易、高效的小鼠2/3肝切除方法。方法取3月龄健康昆明小鼠,进行肝顺次结扎切除手术,观察术后小鼠生存和肝组织再生状况。结果通过顺次结扎切除左小叶和中央小叶,可在15min内完成小鼠2/3肝脏切除手术,术后成活率为90%,术后42h时可见肝组织再生,术后7d肝脏可恢复75%以上的肝组织原质量。结论通过分叶顺次肝切除术,可准确量化肝脏切除的程度,简便易行、成功率高,为肝再生的机理研究提供了理想的动物模型。

关键词：小鼠肝再生动物模型肝2/3切除术

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Cohort study on the treatment of BRAF V600E mutant metastatic colorectal cancer with integrated Chinese and western medicine

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World Journal of Clinical Oncology 2025年第1期16卷 25-33页

作者： Jiang-Yu bian Yu-Fang Feng Wen-Ting He Tong Zhang Department of Oncology Xiyuan Hospital of China Academy of Chinese Medical SciencesBeijing 100091China Department of Oncology The Fourth Clinical Medical College of Xinjiang Medical UniversityUrumqi 830001China Department of Oncology Traditional Chinese Medicine Hospital Affiliated to Xinjiang Medical UniversityUrumqi 830001China

BACKGROUND Patients with BRAF V600E mutant metastatic colorectal cancer(mCRC)have a low incidence rate,poor biological activity,suboptimal response to conventional treatments,and a poor *** the previous cohort study on mCRC conducted by our team,it was observed that integrated Chinese and Western medicine treatment could significantly prolong the overall survival(OS)of patients with colorectal ***,we further explored the survival benefits in the population with BRAF V600E mutant *** To evaluate the efficacy of integrated Chinese and Western medicine in the treatment of BRAF V600E mutant metastatic colorectal *** A cohort study was conducted on patients with BRAF V600E mutant metastatic colorectal cancer admitted to Xiyuan Hospital of China Academy of Chinese Medical Sciences and Traditional Chinese Medicine Hospital of Xinjiang Uygur Autonomous Region from January 2016 to December *** patients were divided into two *** A total of 34 cases were included,with 23 in Chinese-Western medicine cohort(cohort A)and 11 in Western medicine cohort(cohort B).The median overall survival was 19.9 months in cohort A and 14.2 months in cohort B,with a statistically significant difference(P=0.038,hazard ratio=0.46).The 1-3-year survival rates were 95.65%(22/23),39.13%(9/23),and 26.09%(6/23)in cohort A,and 63.64%(7/11),18.18%(2/11),and 9.09%(1/11)in cohort B,*** analysis showed statistically significant differences in median OS between the two cohorts in the right colon,liver metastasis,chemotherapy,and first-line treatment subgroups(P<0.05).CONCLUSION Integrated Chinese and Western medicine can prolong the survival and reduce the risk of death in patients with BRAF V600E mutant metastatic colorectal cancer,with more pronounced benefits observed in patients with right colon involvement,liver metastasis,combined chemotherapy,and first-line treatment.

关键词： Metastatic colorectal cancer BRAF V600E mutation Integrated Chinese and Western medicine Cohort study

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Polymeric nanoparticles of poly(2-oxazoline),tannic acid and doxorubicin for controlled release and cancer treatment

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Chinese Chemical Letters 2020年第2期31卷 501-504页

作者： Lin Liu Liying Yin Hang bian ning Zhang Department of Chemistry Northeast Normal UniversityChangchun 130024China School of Material Science and Engineering Jilin Jianzhu UniversityChangchun 130118China

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) *** electron microscopy(SEM),dynamic light scattering(DLS),UV-vis absorption and photoluminescent measurements indicated the rapid formation of uniform and water dispersible/stable *** 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.

关键词： Polymeric nanoparticle Poly(2-oxazoline) Drug delivery Self-assembly Doxorubicin

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Synthesis and characterization of ceria nanoparticles by complex-precipitation route

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International Journal of Minerals,Metallurgy and Materials 2022年第2期29卷 292-297页

作者： Yanping Li Xue bian Yang Liu Wenyuan Wu Gaofeng fu School of Metallurgy Northeastern UniversityShenyang 110819China

Ceria(CeO_(2))nanoparticles were successfully synthesized via a simple complex-precipitation route that employs cerium chloride as cerium source and citric acid as *** elemental analysis results of carbon,hydrogen,oxygen,and cerium in the precursors were calculated,and the results revealed that the precursors were composed of Ce(OH)_(3),Ce(H_(2)Cit)_(3),or CeCit.X-ray diffraction analysis showed that all ceria nanoparticles had a face-centered cubic *** the molar ratio of citric acid to Ce^(3)+(n)of 0.25 and pH of 5.5,the specific surface area of the sample reached the maximum value of 83.17 m^(2)/*** nanoparticles were observed by scanning electron *** area electron diffraction patterns of several samples were obtained by transmission electron microscopy,and the crystal plane spacing of each low-exponent crystal plane was *** ultraviolet(UV)–visible transmittance curve showed that ceria can absorb UV light and pass through visible *** all samples,the minimum average transmittance of ultraviolet radiation a(UVA)was 4.42%,and that of ultraviolet radiation b(UVB)was 1.56%.

关键词： ceria nanoparticle complex-precipitation crystal plane spacing ultraviolet light

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Selective modification of two-dimensional MoS_2 nanosheets by polymer grafting

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Chinese Chemical Letters 2019年第2期30卷 311-313页

作者： Hang bian Xuejian Zhang Dexin Huang ning Zhang School of Material Science and Engineering Jilin Jianzhu University Key Laboratory of Synthetic Rubber Changchun Institute of Applied ChemistryChinese Academy of Sciences

As an emerging two-dimensional (2D) nanomaterial, single layer ora few layers of molybdenum disulfide (MoS_2) has drawn significant attention in the past decade. In the present work, we report a strategy in direct creating polymer brushes on MoS_2 surfaces via S—C bond in the presence of UV light. The modification of MoS_2 nanosheets can be achieved bilaterally or homolaterally by performing the UVgrafting polymerization on exfoliated MoS_2 nanosheets or a single layer of MoS_2 deposited on a silicon substrate. A series of vinyl monomers including methyl methacrylate (MMA), styrene (St) and 2-isopropenyl-2-oxazoline (IPOx) could be applied to this approach, leading to the formation of poly (methyl methacrylate) (PMMA), polystyrene (PS) and poly (2-isopropenyl-2-oxazoline) (PIPOx) ***, IR, and XPS characterizations indicate the successful formation of homogeneous brush layers on MoS_2 surfaces. The polymer brushes modified MoS_2 may found potential applications in photo dynamic therapy and sensing technologies.

关键词： Molybdenum disulfide Polymer brushes SIPGP Surface modification S-C bond

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Controlled synthesis of silver nanoparticles from polyoxometalates-immobilized poly(4-vinylpyridine) brushes

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Chinese Chemical Letters 2019年第5期30卷 1097-1099页

作者： Hang bian Xuejian Zhang Hongkai Zhao ning Zhang School of Material Science and Engineering Jilin Jianzhu UniversityChangchun 130118China Department of Chemistry Northeast Normal UniversityChangchun 130024China

This contribution reports the immobilization of polyoxometalate(POM)into poly(4-vinyl pyridine)(P4 VP)brushes and the controlled reduction of silver ions,in-situ generating metal nanoparticles in the brushes.P4 VP brushes were straightforwardly created by UV-assisted photopolymerization of 4-vinyl pyridine(4VP)on silicon or glass *** acid(H3 PW12 O40),one of the most widely used Keggin-type POM was anchored onto these pyridine moieties through electrostatic interaction,leading to the P4 VP/POM hybrid *** immobilized POM was further reduced to heteropolyblue,which could be used to generate silver nanoparticles in a controlled ***,UV-vis and IR characterization indicate that P4 VP brushes not only provide an efficient platform in the controlled preparation of Ag nanoparticles,but also efficiently disperse and stabilize POM,thus preventing the aggregation of the generated Ag nanoparticles.

关键词： Polymer brushes Polyoxometalate Ag nanoparticles Grafting polymerization

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