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Quassinoids from the Root Barks of Ailanthus altissima:Isolation,Configurational Assignment,and Cytotoxic Activities

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Chinese Journal of Chemistry 2021年第4期39卷 879-886页

作者： Ye-Qing Du Ming Bai xiao-Qi Yu Tian-Ming Lv Bin Lin xiao-xiao huang Shao-Jiang Song Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research&Development Liaoning ProvinceSchool of Traditional Chinese Materia MedicaShenyang Pharmaceutical UniversityShenyangLiaoning 110016China School of Pharmaceutical Engineering Shenyang Pharmaceutical UniversityShenyangLiaoning 110016China

Main observation and conclusion Quassinoids,a class of highly oxygenated triterpenes,have been isolated as bitter principles from the plants of Simaroubaceae family.Five new quassinoids,chouchunlactone A-E(1-5),and two known ones were identified from the root barks of Ailanthus altissima Swingle(Simaroubaceae).The chemical structures of the new compounds were deduced by spectroscopic data analyses,NMR calculations and DP4+probability analysis.The absolute configurations were defined by comparison of their experimental and calculated electronic circular dichroism(ECD)spectra data,and compounds 1-2 were further confirmed by single-crystal X-ray diffraction.Biologically,compound 5 showed potencies equivalent to sorafenib(IC50 value,9.70μmol·L–1)against HepG2 cells.The Hoechst 33342 staining,JC-1 fluorescent dye and Annexin V/PI analysis studies demonstrated that 5 can induce apoptosis and attenuate mitochondrial membrane potential(MMP)in HepG2 cells.

关键词： Ailanthus altissima Simaroubaceae Quassinoids Cytotoxicity Apoptosis

Complete mitochondrial DNA sequence analysis in two southern Chinese pedigrees with Leber hereditary optic neuropathy revealed secondary mutations along with the primary mutation

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International Journal of Ophthalmology(English edition) 2012年第1期5卷 28-31页

作者： Lei Shu Yong-Ming Zhang xiao-xiao huang Chun-Yue Chen Xian-Ning Zhang Hangzhou Red Cross Hospital Hangzhou 310003 Zhejiang Province China Department of Biochemistry and Genetics National Education Base for Basic Medical Sciences Institute of Cell Biology School of Medicine Zhejiang University Hangzhou 310058 Zhejiang Province China Department of Ophthalmology Xiangshan First People's Hospital Xiangshan County 315700 Zhejiang Province China Hangzhou No. 6 Hospital Hangzhou 310014 Zhejiang Province China

AIM: To investigate mitochondrial factors associated with Leber hereditary optic neuropathy (LHON) through complete sequencing and analysis of the mitochondrial genome of Chinese patients with this disease. METHODS: Two unrelated southern Chinese families with LHON and 10 matched healthy controls were recruited, and their entire mitochondrial DNA (mtDNA) was amplified and sequenced with the universal M13 primer. Then DNA sequence analysis and variation identification were performed by DNAssist and Chromas 2 software and compared with authoritative databases such as Mitomap. RESULTS: Mutational analysis of mtDNA in these two Chinese pedigrees revealed one common LHON-associated mutation, G11778A (Arg -> His), in the MT-ND4 gene. In addition, there were two secondary mutations in Pedigree 1: C34971 (Ala -> Val), and C3571T (Leu -> Phe) in the MT-ND1 gene, which have not been reported; and two secondary mutations occurred in Pedigree 2: A10398G (Thr -> Ala) in the MT-ND3 gene, and T14502C (Ile -> Val) in the MT-ND6 gene. Three polymorphisms, A73G, G94A and A263G in the mtDNA control region, were also found. CONCLUSION: Our study confirmed that the known MT-ND4* G11778A mutation is the most significant cause of LHON. The C3497T and C3571T mutations in Pedigree 1 were also both at hot-spots of MT-ND1; they may affect the respiratory chain in coordination with the primary mutation G11778A. In Pedigree 2, the two secondary mutations A10398G of MT-ND3 and T14502C of MT-ND6 may influence mitochondrial respiratory complex I, leading to the mitochondrial respiratory chain dysfunction which results in optic atrophy together with G11778A. Therefore, not only the common primary LHON mutation is responsible for the visual atrophy, but other secondary mtDNA mutations should also be considered when giving genetic counseling.

关键词： Leber hereditary optic neuropathy mitochondrial DNA mitochondrial respiratory complex I mutation

Isolation of chemical compositions as dietary antioxidant supplements and neuroprotectants from Chaga mushroom (Inonotus obliquus)

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Food Bioscience 2022年第3期47卷 211-220页

作者： Ye Chang Ming Bai xiao-Bian Xue Chun-Xin Zou xiao-xiao huang Shao-Jiang Song Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development Liaoning ProvinceChina Engineering Research Center of Natural Medicine Active Molecule Research & Development Liaoning ProvinceChina Key Laboratory of Natural Bioactive Compounds Discovery & Modification ShenyangChina School of Traditional Chinese Materia Medica Shenyang Pharmaceutical UniversityShenyangLiaoning110016China

Excessive free radicals can cause oxidative stress (OS),which lead to neurodegenerative diseases (ND) are harmful to the human body.Therefore,it is necessary to explore dietary antioxidants and neuroprotectants from nutrient foods.Chaga mushroom (Inonotus obliquus ) has been used as an important functional food in many countries for centuries.This present study was carried out to discover active compounds from I.obliquus and investigate the in vitro antioxidant activity and neuroprotective activity.Sixteen natural products including two new isocoumarins (1 –2 ),a new 8-O -4′-neolignan (3 ),a new cyclic diarylheptanoid (4 ),and twelve known compounds (5 –16 ) were separated from I.obliquus .Their structures were elucidated by extensive spectroscopic analyses of high resolution electrospray mass spectrometry (HRESIMS),ultra violet (UV),and nuclear magnetic resonance (NMR).Among them,compounds 1 and 2 revealed remarkable antioxidant activities through the comprehensive analysis of DPPH,ABTS,and ferric reducing antioxidant power (FRAP) methods.Meanwhile,compound 1 demonstrated significant neuroprotective activity by increasing SH-SY5Y cells viability and preventing mitochondrial damage.Apart from that,electronic analyses were performed using the highest occupied molecular orbital (HOMO),and the lowest unoccupied molecular orbital (LUMO) to analyze compound 1 .These results indicated that compound 1 had a significant implication for the search of natural raw material to prevent OS and nerve damage in the field of functional foods,and the isocoumarin fragment as well as an oxygenated cis double-bond might be the active sites to play prominent parts in antioxidant and neuroprotective activities of compound 1 .

关键词： Inonotus obliquus Chaga mushroom Functional food Neuroprotective activity Antioxidant activity

Outcomes of laparoscopic bile duct exploration for choledocholithiasis with small common bile duct

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World Journal of Clinical Cases 2021年第8期9卷 1803-1813页

作者： xiao-xiao huang Jia-Yi Wu Yan-Nan Bai Jun-Yi Wu Jia-Hui Lv Wei-Zhao Chen Li-Ming huang Rong-Fa huang Mao-Lin Yan Department of Hepatobiliary and Pancreatic Surgery Shengli Clinical Medical College of Fujian Medical UniversityFujian Provincial HospitalFuzhou 350001Fujian ProvinceChina

BACKGROUND Laparoscopic cholecystectomy(LC)combined with laparoscopic common bile duct(CBD)exploration(LCBDE)is one of the main treatments for choledocholithiasis with CBD diameter of larger than 10 mm.However,for patients with small CBD(CBD diameter≤8 mm),endoscopic sphincterotomy remains the preferred treatment at present,but it also has some drawbacks associated with a series of complications,such as pancreatitis,hemorrhage,cholangitis,and duodenal perforation.To date,few studies have been reported that support the feasibility and safety of LCBDE for choledocholithiasis with small CBD.AIM To investigate the feasibility and safety of LCBDE for choledocholithiasis with small CBD.METHODS A total of 257 patients without acute cholangitis who underwent LC+LCBDE for cholecystolithiasis from January 2013 to December 2018 in one institution were reviewed.The clinical data were retrospectively collected and analyzed.According to whether the diameter of CBD was larger than 8 mm,257 patients were divided into large CBD group(n=146)and small CBD group(n=111).Propensity score matching(1:1)was performed to adjust for clinical differences.The demographics,intraoperative data,short-term outcomes,and long-term follow-up outcomes for the patients were recorded and compared.RESULTS In total,257 patients who underwent successful LC+LCBDE were enrolled in the study,146 had large CBD and 111 had small CBD.The median follow-up period was 39(14-86)mo.For small CBD patients,the median CBD diameter was 0.6 cm(0.2-2.0 cm),the mean operating time was 107.2±28.3 min,and the postoperative bile leak rate,rate of residual CBD stones(CBDS),CBDS recurrence rate,and CBD stenosis rate were 5.41%(6/111),3.60%(4/111),1.80%(2/111),and 0%(0/111),respectively;the mean postoperative hospital stay was 7.4±3.6 d.For large CBD patients,the median common bile duct diameter was 1.0 cm(0.3-3.0 cm),the mean operating time was 115.7±32.0 min,and the postoperative bile leak rate,rate of residual CBDS,CBDS recurrence rate,and CBD stenosis rate were 5.41%(9/146)

关键词： Common bile duct stones Laparoscopic common bile duct exploration Endoscopic sphincterotomy Bile leak Choledochal stenosis Recurrence

Low-temperature synthesis of SiC nanowires with Ni catalyst

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Rare Metals 2019年第3期38卷 206-209页

作者： Wei-Li Xie xiao-Dong Zhang Wen-Hui Liu Qi Xie Guang-Wu Wen xiao-xiao huang Jian-Dong Zhu Fei-Xiang Ma School of Material Science and Engineering Harbin Institute of Technology Department of Prosthodontics School of StomatologyHarbin Medical University School of Material Science and Engineering Harbin Institute of Technology at Weihai

SiC nano wires were fabricated on the silicon substrate dipped with a layer of Ni catalyst at 900 ℃ by gas pressure annealing processing. The morphologies and crystal structures were determined by scanning electron microscopy(SEM), transmission electron microscopy(TEM)and X-ray diffraction(XRD). The results show that the assynthesized nanowires are β-SiC single crystalline with diameter range of 50-100 nm, and length of tens of micron by directly annealing at 900 ℃. The SiC nano wires grow along the [111] direction with highly uniform morphology. And the possible growth mechanism of SiC nano wires is proposed.The present work provides an efficient strategy for the production of high-quality SiC nano wires.

关键词： SiC nanowires Single crystalline silicon Ni catalyst Growth mechanism

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Long-lived lunar volcanism sustained by precession-driven core-mantle friction

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National Science Review 2024年第2期11卷 114-123页

作者： Shuoran Yu xiao xiao Shengxia Gong Nicola Tosi Jun huang Doris Breuer Long xiao Dongdong Ni State Key Laboratory of Lunar and Planetary Sciences Macau University of Science and Technology Planetary Science Institute State Key Laboratory of Geological Processes and Mineral Resources School of Earth Sciences China University of Geosciences CAS Key Laboratory of Planetary Sciences Shanghai Astronomical Observatory Institute of Planetary Research German Aerospace Centre(DLR)

Core-mantle friction induced by the precession of the Moon's spin axis is a strong heat source in the deep lunar mantle during the early phase of a satellite's evolution, but its influence on the long-term thermal evolution still remains poorly explored. Using a one-dimensional thermal evolution model, we show that core-mantle friction can sustain global-scale partial melting in the upper lunar mantle until ～3.1 Ga, thus accounting for the intense volcanic activity on the Moon before ～3.0 Ga. Besides, core-mantle friction tends to suppress the secular cooling of the lunar core and is unlikely to be an energy source for the long-lived lunar core dynamo. Our model also favours the transition of the Cassini state before the end of the lunar magma ocean phase(～4.2 Ga), which implies a decreasing lunar obliquity over time after the solidification of the lunar magma ocean. Such a trend of lunar obliquity evolution may allow volcanically released water to be buried in the lunar regolith of the polar regions. As a consequence, local water ice could be more abundant than previously thought when considering only its accumulation caused by solar wind and comet spreading.

关键词： Moon precession orbit volcanism

Article History Investigation and analysis of the quality of life of centenarians in Chongming area of Shanghai

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Journal of Hainan Medical University 2019年第18期25卷 62-67页

作者： xiao-xiao huang Zhi-Heng Ma Hui Song Guo-Hong Li School of Public Health Shanghai Jiaotong University School of MedicineShanghai200025 Chongming Branch of Xinhua Hospital Shanghai Jiao Tong University School of MedicineShanghai202150

Objective:To investigate the status quo and influencing factors of the quality of life of the elderly aged≥100 years old in Chongming area of Shanghai,and provide a basis for the construction of a world-class ecological island in Chongming area and promote the cause of healthy aging.Methods:A cross-sectional survey was conducted to screen 71 elderly people who were 100 years old and reached the age of 100.The interview was conducted with a face-to-face questionnaire survey.Results:The SF-36 health questionnaire of the centenarians in Chongming area scored and in the physiological functions,physiological functions,physical pain,general health status,energy,social function,emotional function and mental health is(36.35±13.45),(36.62±38.69),(62.56±21.57),(47.04±6.06),(67.23±18.76),(71.83±25.85),(60.09±45.29),(78.70±22.20).The total physical health assessment and mental health assessment scores are(181.577±50.271)and(277.855±81.636).Univariate statistics show that different genders,education levels,marital status,economic sources,urban or rural areas,insurance categories,chronic diseases,number of children,old-age patterns,preferred forms of residence,interval between child care,and whether children are in the same city Factors such as≥2 in the family,long-term diet,diet,eating habits,drinking habits,tea drinking habits,physical examination,lack of sleep 4h,nap habits and other factors in the different dimensions of the SF-36 scale,the difference is statistically significant(P<0.05);multivariate stepwise regression showed that the relevant influencing factors were pension mode,dietary preference,location(urban/rural),chronic disease,preferred lifestyle,lack of sleep 4 h,education level,marital status(P<0.05).Conclusion:The centenarians in Chongming area have a medium quality of life rating and a high overall mental health assessment.The centenarians in Chongming have a good psychological state.The life behavior pattern of the centenarians is worth learning.It is recommended to implement the family mutual aid public se

关键词： Centenarians Quality of life Influencing factors

Demyelinating neuropathy in patients with hepatitis B virus: A case report

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World Journal of Clinical Cases 2024年第10期12卷 1766-1771页

作者： xiao-xiao Yan Jin huang Jing Lin Department of Neurology The Third Affiliated Hospital of Wenzhou Medical UniversityRuian 325000Zhejiang ProvinceChina

BACKGROUND Hepatitis B rarely leads to demyelinating neuropathy,despite peripheral neuropathy being the first symptom of hepatitis B infection.CASE SUMMARY A 64-year-old man presented with sensorimotor symptoms in multiple peripheral nerves.Serological testing showed that these symptoms were due to hepatitis B.After undergoing treatment involving intravenous immunoglobulin and an antiviral agent,there was a notable improvement in his symptoms.CONCLUSION Although hepatitis B virus(HBV)infection is known to affect hepatocytes,it is crucial to recognize the range of additional manifestations linked to this infection.The connection between long-term HBV infection and demyelinating neuropathy has seldom been documented;hence,prompt diagnostic and treatment are essential.The patient's positive reaction to immunoglobulin seems to be associated with production of the antigen-antibody immune complex.

关键词： Hepatitis B virus infection Extrahepatic manifestations Demyelinating neuropathy Intravenous immunoglobulin Electroneuromyography Case report

Role of biochar in raising blue carbon stock capacity of salt marshes

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Pedosphere 2024年第1期34卷 19-22页

作者： Yuzhou huang Xi xiao Ocean College Zhejiang UniversityZhoushan 316021China Key Laboratory of Marine Ecological Monitoring and Restoration Technologies of the Ministry of Natural Resources of China Shanghai 201306China Donghai Laboratory Zhoushan 316021China Ocean Academy Zhejiang UniversityZhoushan 316021China Key Laboratory of Watershed Non-point Source Pollution Control and Water Eco-security of Ministry of Water Resources College of Environmental and Resources SciencesZhejiang UniversityHangzhou 310058China

Salt marshes are an important blue carbon ecosystem, with surprisingly fast carbon accumulation rates that are 40 times higher than those of terrestrial forests. In recent decades, salt marshes have suffered great degradation and loss all over the world. The idea to enhance carbon stock in salt marshes(so-called blue carbon) using biochar (so-called black carbon) has recently been proposed. Although experiments and observations remain limited, significant enhancements in soil organic carbon and plant growth have been documented in most case studies. However, due to the limited number of observations and their relatively short time window ranging from months to less than one year, there still exists a knowledge gap regarding the process, mechanism, and effect of biochar in enhancing carbon stock in salt marshes. Future research is urgently needed in the following perspectives:1) exploring the relationship between carbon stock enhancement efficiency and biochar properties, 2) optimizing the physical and chemical properties of biochar to boost its efficiency, and 3)studying the in-situ responses of complex carbon pools to biochar addition, especially under tidal conditions and over a longer period of time.

关键词： soil stock char

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