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Yang L, Zhang JY, Duan XH, Gao P, Jiao J, Guo LN. Copper-Catalyzed Cyanoalkylation of Amines via C–C Bond Cleavage: An Approach for C(sp3)–N Bond Formations. J Org Chem 2019; 84:8615-8629. [DOI: 10.1021/acs.joc.9b01084] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Xiao XW, Du J, Jiao B, Liao XX, Zhou L, Liu XX, Yuan ZH, Guo LN, Wang X, Shen L, Lin ZY. Novel ATL1 mutation in a Chinese family with hereditary spastic paraplegia: A case report and review of literature. World J Clin Cases 2019; 7:1358-1366. [PMID: 31236401 PMCID: PMC6580333 DOI: 10.12998/wjcc.v7.i11.1358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/23/2019] [Accepted: 04/09/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Hereditary spastic paraplegias (HSPs) refer to a group of heterogeneous neurodegenerative diseases characterized by lower limbs spasticity and weakness. So far, over 72 genes have been found to cause HSP (SPG1-SPG72). Among autosomal dominant HSP patients, spastic paraplegia 4 (SPG4/SPAST) gene is the most common pathogenic gene, and atlastin-1 (ATL1) is the second most common one. Here we reported a novel ATL1 mutation in a Chinese spastic paraplegia 3A (SPG3A) family, which expands the clinical and genetic spectrum of ATL1 mutations.
CASE SUMMARY A 9-year-old boy with progressive spastic paraplegia accompanied by right hearing loss and mental retardation for five years was admitted to our hospital. Past history was unremarkable. The family history was positive, and his grandfather and mother had similar symptoms. Neurological examinations revealed hypermyotonia in his lower limbs, hyperreflexia in knee reflex, bilateral positive Babinski signs and scissors gait. The results of blood routine test, liver function test, blood glucose test, ceruloplasmin test and vitamin test were all normal. The serum lactic acid level was significantly increased. The testing for brainstem auditory evoked potential demonstrated that the right side hearing was impaired while the left was normal. Magnetic resonance imaging showed mild atrophy of the spinal cord. The gene panel test revealed that the proband carried an ATL1 c.752A>G p.Gln251Arg (p.Q251R) mutation, and Sanger sequencing confirmed the existence of family co-segregation.
CONCLUSION We reported a novel ATL1 Q251R mutation and a novel clinical phenotype of hearing loss in a Chinese SPG3A family.
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Chen L, Guo LN, Ma ZY, Gu YR, Zhang J, Duan XH. Iminyl Radical-Triggered 1,5-Hydrogen-Atom Transfer/Heck-Type Coupling by Visible-Light Photoredox Catalysis. J Org Chem 2019; 84:6475-6482. [DOI: 10.1021/acs.joc.9b00525] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chen ML, Wang C, Tan CF, Liu WW, Guo LN, Du L, Tang YN, Li JL, Zhu DM, Zhang W. [Serum metabolic profile involving protective effect of "Neiguan"(PC6)-electroacupuncture preconditioning in rats with myocardial ischemia reperfusion injury]. ZHEN CI YAN JIU = ACUPUNCTURE RESEARCH 2019; 44:176-82. [PMID: 30945499 DOI: 10.13702/j.1000-0607.170627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To observe the effect of "Neiguan" (PC6)-electroacupuncture (EA) preconditioning on serum metabolites in myocardial ischemia-reperfusion injury (MIRI) rats, so as to reveal its mechanism underlying improvement of ischemic myocardium from metabonomics. METHODS A total of 48 male SD rats were randomly divided into control, model, EA "Neiguan"(PC6) and EA "Hegu"(LI4) groups (n=12 rats/ group). Rats of the control group were just banded on animal boards for 30 min, once daily for 7 days. The MIRI model was established by occlusion of the left anterior descending branch of the left coronary artery for 40 min, followed by reperfusion for 1 h, and rats of the model group were also banded as those in the control group. Before modeling, EA (10 Hz/50 Hz, 1 mA) was applied to bilateral "Neiguan"(PC6) and "Hegu"(LI4) for 30 min, once daily for 7 successive days. After the treatment, serum samples were collected to be analyzed by proton nuclear magnetic resonance (1H NMR) spectroscopy. The orthogonal partial least squares discriminate analysis (PLS-DA) was employed to distinguish the serum differential metabolic profile of rats in different groups and identify potential biomarkers. RESULTS After modeling, the ECG of model group and electroacupuncture groups showed T wave towering, and there was no obvious ST segment between R wave and T wave. The T wave decreased more than 0.2 mV after reperfusion, and there was no obvious ST segment. Compared with the control group, MIRI induced significant changes of metabolites in the serum including increase of acetoacetate acid, lectic acid, creatine, glycerol and glucose, and decrease of alanine, glutamine, glycerophosphoryl choline and phosphorylcholine. In comparison with the model group, PC6-EA preconditioning induced significant changes, including an increase of glucose, and a decrease of leucine,isoleucine, valine,3-hydroxybutyric acid,lactate,acetate,acetone,acetoacetate acid,pyruvic acid,glutamine,creatine and glycerol. There is no significant difference in metabolic patterns between "Hegu" group and model group. Metabolic pathway enrichment analysis indicated that the protective effect of PC6-EA pretreatment was realized mainly by regulating pathways of glycolysis, gluconeogenesis, citric acid metabolism, pyruvate metabolism, ketone body metabolism, etc. CONCLUSION PC6-EA pretreatment has a role in regulating gluconeogenesis, pyruvate metabolism, amino metabolism, ketone body metabolism and energy metabolism in rats with MIRI, which maybe contribute to its protective effect on ischemic myocardium, but the specific metabolic pathways and mechanisms need being studied further.
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Zong X, Yang JX, Zhang Y, Cao DY, Shen K, You Y, Guo LN. Postchemotherapy sarcoma as a somatic-type malignancy derived from the gonadal yolk sac tumor in a patient with 46, XY pure gonadal dysgenesis. Onco Targets Ther 2019; 12:2365-2372. [PMID: 30992672 PMCID: PMC6445222 DOI: 10.2147/ott.s192111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
46, XY pure gonadal dysgenesis (PGD) is characterized as a female phenotype with strip-like gonads, which has a high tendency to develop into gonadal tumors. Somatic-type malignancies of germ cell tumors (SMs of GCTs) refer to the presence of malignant non-germ cell histologies admixed with GCTs, which are usually chemoresistant and indicate poor prognosis. This case report aimed to analyze the special histological type of GCTs and the importance of salvage surgery in the treatment of refractory GCTs. We report a unique case of gonadal yolk sac tumor (YST) transformed into SMs in a patient with 46, XY PGD. This 18-year-old woman underwent laparoscopic pelvic tumor resection, considered her first surgery, 2 years ago, and pathology revealed YST with initial alpha-fetoprotein (AFP) level measuring >3,000 ng/mL. She underwent seven cycles of chemotherapy, and the AFP level decreased to within a normal range after the second cycle. However, a computed tomography scan after the seventh cycle revealed abdominal and pelvic metastases, and vaginal bleeding was continuously observed. Laparoscopic exploration and laparotomy with tumor subtotal resection were performed. A pathology report showed SMs (sarcoma) derived from YST. Whole exome sequencing demonstrated that the main somatic mutation was a non-synonymous mutation of KRAS (c.182A>G), and this result did not show any indications for targeted drugs. She received three cycles of PEI (cisplatin, etoposide, and ifosfamide) chemotherapy but showed no response. She refused to undergo further treatment and has been alive with the disease for 7 months. This suggests that SMs may be one of the reasons for chemoresistance of refractory GCTs, and salvage surgery may be one of the most effective treatments for this patient. Targeted therapy may be a new choice for chemoresistant GCTs, but drug selection must be based on gene sequencing, and its efficacy still needs to be verified by further study.
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Gu YR, Duan XH, Chen L, Ma ZY, Gao P, Guo LN. Iminyl Radical-Triggered Intermolecular Distal C(sp3)–H Heteroarylation via 1,5-Hydrogen-Atom Transfer (HAT) Cascade. Org Lett 2019; 21:917-920. [DOI: 10.1021/acs.orglett.8b03865] [Citation(s) in RCA: 62] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Huang LJ, Du WT, Liu YC, Guo LN, Zhang JJ, Qin MM, Liu K. Loneliness, Stress, and Depressive Symptoms Among the Chinese Rural Empty Nest Elderly: A Moderated Mediation Analysis. Issues Ment Health Nurs 2019; 40:73-78. [PMID: 30633625 DOI: 10.1080/01612840.2018.1437856] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This study aimed to explore the relationship of loneliness, perceived stress, and depressive symptoms among the Chinese rural empty nest elderly. The role of sense of coherence (SOC) as a moderating variable was investigated in a representative sample of older adults in Henan, China, from November 2016 to February 2017. Results indicated that perceived stress mediated the relationship between loneliness and depressive symptoms, and SOC acted as a moderator on this mediating model. The mediation effect of perceived stress was significant only when SOC was lower. The results emphasized the importance of perceived stress in older adults. SOC was a protective factor with regard to depressive symptoms, and improving SOC should be a focus of health promotion with the elderly.
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Hai M, Guo LN, Wang L, Duan XH. isible Light Promoted Ketoalkylation of Quinoxaline-2(1H)-ones via Oxidative Ring-Opening of Cycloalkanols. ACTA CHIMICA SINICA 2019. [DOI: 10.6023/a19040155] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yang JC, Chen L, Yang F, Li P, Guo LN. Copper-catalyzed borylation of cycloalkylsilyl peroxides via radical C–C bond cleavage. Org Chem Front 2019. [DOI: 10.1039/c9qo00472f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A mild copper-catalyzed radical C–C bond cleavage/borylation of cycloalkylsilyl peroxides is described. A range of four to eight, and even twelve-membered substrates were compatible, offering rapid access to keto-functionalized alkyl boronic esters.
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Huo Z, Guo LN, Shi XH, Liang ZY, Wang JH, Liu XG, Lu T, Pang JY. A Clinicopathological Study on Stage I Ovarian Adult Granulosa Cell Tumors with Recurrence within 5 Years. Chin Med J (Engl) 2018; 131:2877-2879. [PMID: 30511696 PMCID: PMC6278191 DOI: 10.4103/0366-6999.246066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2018] [Indexed: 11/05/2022] Open
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Ma ZY, Guo LN, Gu YR, Chen L, Duan XH. Iminyl Radical-Mediated Controlled Hydroxyalkylation of Remote C(sp
3
)-H Bond via Tandem 1,5-HAT and Difunctionalization of Aryl Alkenes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801198] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Zhang JJ, Duan XH, Wu Y, Yang JC, Guo LN. Transition-metal free C-C bond cleavage/borylation of cycloketone oxime esters. Chem Sci 2018; 10:161-166. [PMID: 30713627 PMCID: PMC6328001 DOI: 10.1039/c8sc03315c] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 09/28/2018] [Indexed: 12/22/2022] Open
Abstract
An efficient transition-metal free C-C bond cleavage/borylation of cycloketone oxime esters has been described. In this reaction, the B2(OH)4 reagent not only served as the boron source but also acted as an electron donor source through formation of a complex with a DMAc-like Lewis base. This complex could be used as an efficient single electron reductant in other ring-opening transformations of cycloketone oxime esters. Free-radical trapping, radical-clock, and DFT calculations all suggest a radical pathway for this transformation.
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Yu SY, Guo LN, Xiao M, Kudinha T, Kong F, Wang H, Cheng JW, Zhou ML, Xu H, Xu YC. Trichosporon dohaense, a rare pathogen of human invasive infections, and literature review. Infect Drug Resist 2018; 11:1537-1547. [PMID: 30288064 PMCID: PMC6160283 DOI: 10.2147/idr.s174301] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Background Trichosporon dohaense is a rare fungal species that has not been described in human invasive infections. Patients and methods In this study, we investigated two T. dohaense isolates from patients with invasive infections in two hospitals in China, as part of the China Hospital Invasive Fungal Surveillance Net (CHIF-NET) program. Both patients were under immunocompromised conditions. Results On chromogenic agar, T. dohaense isolates were dark blue, similar to the color of Candida. tropicalis, but the characteristic moist colony appearance was quite different from that of T. asahii. The two isolates were misidentified as T. asahii and T. inkin by the VITEK 2 YST system. The rDNA internal transcribed spacer (ITS) region and the D1/D2 domain sequences of the two T. dohaense isolates were 100% identical to T. dohaense type strain CBS10761T. The sequence of the intergenic spacer region-1 also clearly distinguished the species. Of the three matrix-assisted laser desorption/ionization time-of-flight mass spectrometry systems, Bruker Biotyper and Autobio MS correctly identified the two isolates to species level, whereas Vitek MS systems misidentified them as T. ovoides or T. asteroides. Echinocandins exhibited no in vitro activities against the two T. dohaense isolates. In addition, the isolates exhibited intermediate susceptibility to fluconazole (with minimal inhibitory concentrations [MICs] of 8 and 16 µg/mL) and itraconazole, voriconazole, and posaconazole (MICs of 0.25-1 µg/mL). T. dohaense demonstrated susceptibility to amphotericin B with MIC of 1 µg/mL. The MICs of fluconazole and voriconazole in our study were higher than the MIC50 of 62 for T. asahii isolates (4 and 0.064 µg/mL) in the CHIF-NET program. Conclusion This case study points to a possible emergence of T. dohaense as an opportunistic human invasive fungal pathogen, and the reduced susceptibility should be noted.
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Liu LJ, Hu XH, Guo LN, Wang RF, Zhao QT. Anti-inflammatory effect of the compounds from the flowers of Trollius chinensis. PAKISTAN JOURNAL OF PHARMACEUTICAL SCIENCES 2018; 31:1951-1957. [PMID: 30150194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
In order to investigate the anti-inflammatory activity of flavonoids, phenolic acids, and alkaloids from the flowers of Trollius chinensis, some representative compounds, namely, orientin, 2"-O-β-L-galactopyranosylorientin, vitexin, quercetin, isoquercetin, luteolin, veratric acid, proglobeflowery acid, trollioside, and trolline were selected to study their inhibitory effects against LPS-induced NO, IL-6, and TNF-β release in RAW264.7 cells. At the higher concentration, both phenolic acids and flavonoids inhibited the production of NO, whereas only phenolic acids showed this effect at the lower concentration. Although trolline had stronger cytotoxicity, it exhibited a potential effect of decreasing NO production induced by LPS in the non-toxic concentration range. In addition, all tested compounds decreased the production of IL-6 and TNF-a by almost 50% at both the higher and lower concentrations. It is concluded that the anti-inflammatory activity of the phenolic acids is stronger than that of the flavonoids.
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Guo LN, Liu YJ, McCallum J, Söderhamn U, Ding XF, Yv SY, Zhu YR, Guo YR. Perceived stress and depression amongst older stroke patients: Sense of coherence as a mediator? Arch Gerontol Geriatr 2018; 79:164-170. [PMID: 30265911 DOI: 10.1016/j.archger.2018.08.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 08/22/2018] [Accepted: 08/24/2018] [Indexed: 12/26/2022]
Abstract
OBJECTIVE This study aimed to explore the relationship between perceived stress, sense of coherence, and depression among older stroke patients. METHODS A demographic questionnaire, the Perceived Stress Scale (PSS), the Sense of Coherence Scale (SOC) and the Center for Epidemiologic Studies Depression Scale (CES-D) were distributed to 3000 older stroke patients from Neurology wards in six large general hospitals, and 2907 individuals completed the survey. Data analysis consisted of correlation, multiple linear regression, and structural equation modeling. RESULTS The total score of the SOC and perceived stress showed a negative correlation (r = -0.80, P < 0.01), the total SOC of coherence and depression also resulted in a negative correlation (r = -0.77, P < 0.01), and the total score of the perceived stress and depression resulted in a positive correlation (r = 0.82, P < 0.01). The results of multiple regression analyses indicated that SOC mediated the association between perceived stress and depression, and the influence of perceived stress on depression was decreased by 16.0%with in the sense of being out of control dimension and was decreased by 12.3% within the feeling of tension dimension when sense of coherence was added to the model. The structural equation model confirmed that the sense of coherence had a partial mediation effect between perceived stress and depression. CONCLUSION SOC is the mediating variable between perceived stress and depression, and can reduce the influence of perceived stress on depression.
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Zhao JF, Duan XH, Gu YR, Gao P, Guo LN. Iron-Catalyzed Decarboxylative Olefination of Cycloketone Oxime Esters with α,β-Unsaturated Carboxylic Acids via C–C Bond Cleavage. Org Lett 2018; 20:4614-4617. [DOI: 10.1021/acs.orglett.8b01901] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Sun J, Li C, Ma Y, Guo LN, Tian MC, Liu Q, Liu WH, Wu J, Deng FM, Liu YL. [Establishing Glioma-associated Oncogene Homolog 1 Genetic Lineage-tracing Mice for Studies on Hepatic Fibrosis]. SICHUAN DA XUE XUE BAO. YI XUE BAN = JOURNAL OF SICHUAN UNIVERSITY. MEDICAL SCIENCE EDITION 2018; 49:560-565. [PMID: 30378310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To establish Gli1-CreERt2; tdTomato genetic lineage-tracing mice for studies on hepatic fibrosis. METHODS Offspring of ROSA26 td Tomato (tdTomato) mice and Gli1-CreERt2 mice (Gli1 mice) were obtained, with Gli1-CreERt2; tdTomato genotype being identified by PCR. The mice model of hepatic fibrosis was induced with CCl4. Their liver samples were taken. The formalin-fixed and paraffin-embedded samples were prepared for HE staining and Masson staining. The expression of tdTomato was observed under immunofluorescent microscope. RESULTS An ideal number of Gli1-CreERt2; tdTomato genetic lineage-tracing mice were harvested. The differences in fertility between the parental and the offspring mice were not significant (P>0.05). Pseudolobular formation occurred in the CCl4-induced hepatic fibrosis model mice. Enhanced red fluoresce was observed in the model mice. CONCLUSION Gli1-CreERt2; tdTomato genetic lineage-tracing mice can be used to monitor the cell source of fibrous tissues, its transition as well as the underlying mechanism of pathogenesis of hepatic fibrosis.
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Wang Z, Yang XD, Zha HY, Guo LN, Shen D, Xu LZ, Yang SL. [Lignan glycosides and sucrose esters from roots of Securidaca inappendiculata]. ZHONGGUO ZHONG YAO ZA ZHI = ZHONGGUO ZHONGYAO ZAZHI = CHINA JOURNAL OF CHINESE MATERIA MEDICA 2018; 42:2318-2322. [PMID: 28822186 DOI: 10.19540/j.cnki.cjcmm.20170308.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/21/2017] [Indexed: 11/18/2022]
Abstract
Nine compounds, including five lignan glycosides (1-5), three sucrose esters (6-8), and one organic acid ester (9), were isolated from the ethanol extract of the roots of Securidaca inappendiculata by various chromatographic methods including silica gel, MPLC and preparative HPLC. Their structures were elucidated as acernikol-4″-O-β-D-glucopyranoside (1), (7R, 8S)-dihydrodehydrodiconiferyl alcohol 9-O-β-D-glucopyranoside (2), (7R, 8S)-dihydrodehydrodiconiferyl alcohol 4-O-β-D-glucopyranoside (3), (7R, 8S)-dihydrodehydrodiconiferyl alcohol 9'-O-β-D-glucopyranoside (4), (7R, 8S)-5-methoxydihydrodehy-drodiconiferyl alcohol 4-O-β-D-glucopyranoside (5), 3, 6'-O-diferuloylsucrose (6), 3-O-feruloyl-6'-O-sinapoylsucrose (7), sibricose A5 (8), and mehyl ferulate (9) on the basis of 1H-, 13C-NMR and MS experiments. Compounds 1-5, 8, and 9 were isolated from the Securidaca genus for the first time. Compounds 2, 3, and 7 exhibited weak cytotoxic activities against Hela and MCF-7 cell lines.
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Zhang JY, Duan XH, Yang JC, Guo LN. Redox-Neutral Cyanoalkylation/Cyclization of Olefinic 1,3-Dicarbonyls with Cycloketone Oxime Esters: Access to Cyanoalkylated Dihydrofurans. J Org Chem 2018; 83:4239-4249. [DOI: 10.1021/acs.joc.8b00271] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhao JF, Gao P, Duan XH, Guo LN. Iron-Catalyzed Ring-Opening/Allylation of Cyclobutanone Oxime Esters with Allylic Sulfones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701630] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Guo LN, Li Y, Hsueh PR, Wang P, Zhao YP, Xu YC. Microbiological characteristics of a novel species most closely related to 'Bergeyella cardium' as a pathogen of infectious endocarditis. PLoS One 2018; 13:e0191715. [PMID: 29370239 PMCID: PMC5784969 DOI: 10.1371/journal.pone.0191715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Accepted: 12/15/2017] [Indexed: 11/18/2022] Open
Abstract
Infectious endocarditis (IE) can be caused by various pathogens, from dominating agents such as viridans group streptococci and staphylococci to rare species that are less virulent and not typically considered to be pathogens. In this study, we have isolated a novel species from a patient with problem of IE which was genetically most closely related to 'Bergeyella cardium', a causative pathogen of IE first reported in Korea in 2015 as a new species of the genus Bergeyella, with a similarity of 98.8% in 16S rRNA sequences. Microbiological characteristics, including morphology, biochemical identification and antimicrobial susceptibility profiling, of this novel species were determined. This fastidious Gram-negative bacillus could only be identified successfully by molecular sequencing analysis at present, and it exhibited low minimum inhibitory concentrations to the antibiotics tested except for aminoglycosides. Phylogeny analysis revealed this novel species clustered well with 'B. cardium' and other close species of genus Bergeyella.
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Yang JC, Zhang JY, Zhang JJ, Duan XH, Guo LN. Metal-Free, Visible-Light-Promoted Decarboxylative Radical Cyclization of Vinyl Azides with N-Acyloxyphthalimides. J Org Chem 2018; 83:1598-1605. [DOI: 10.1021/acs.joc.7b02861] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Wu J, Zhang JY, Gao P, Xu SL, Guo LN. Copper-Catalyzed Redox-Neutral Cyanoalkylarylation of Activated Alkenes with Cyclobutanone Oxime Esters. J Org Chem 2017; 83:1046-1055. [PMID: 29239182 DOI: 10.1021/acs.joc.7b02714] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The copper-catalyzed cyclization of activated alkenes with cyclobutanone O-acyl oximes under redox-neutral conditions has been reported. This facile protocol provided an efficient approach to a variety of cyanoalkylated oxindoles and dihydroquinolin-2(1H)-ones with a broad substrate scope and excellent functional group tolerance. In this reaction, sequential C-C bond cleavage, radical addition, and cyclization processes were involved, wherein multiple bonds were constructed in a one-pot reaction. Mechanistic studies suggest that the reaction probably proceeded via a radical pathway.
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Ding XF, Sun M, Guan FX, Guo LN, Zhang YY, Wan YD, Zhang XJ, Yu YW, Ma SS, Yao HM, Yao R, Zhang RF, Sun TW, Kan QC. Prenatal Exposure to LPS Alters The Intrarenal RAS in Offspring, Which Is Ameliorated by Adipose Tissue-Derived Mesenchymal Stem Cells. Am J Hypertens 2017; 30:1211-1219. [PMID: 28992100 DOI: 10.1093/ajh/hpx117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 06/22/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Prenatal lipopolysaccharide (LPS) exposure causes hypertension in rat offspring through an unknown mechanism. Here, we investigated the role of the intrarenal renin-angiotensin system (RAS) in hypertension induced by prenatal LPS exposure and also explored whether adipose tissue-derived mesenchymal stem cells (ADSCs) can ameliorate the effects of prenatal LPS exposure in rat offspring. METHODS Sixty-four pregnant rats were randomly divided into 4 groups (n = 16 in each), namely, a control group and an LPS group, which were intraperitoneally injected with vehicle and 0.79 mg/kg LPS, respectively, on the 8th, 10th, and 12th days of gestation; an ADSCs group, which was intravenously injected with 1.8 × 107 ADSCs on the 8th, 10th, and 12th days of gestation; and an LPS + ADSCs group, which received a combination of the treatments administered to the LPS and ADSCs groups. RESULTS Prenatal LPS exposure increased blood pressure, Ang II expression, Ang II-positive, monocyte and lymphocyte, apoptotic cells in the kidney, and induced renal histological changes in offspring; however, the LPS and control groups did not differ significantly with respect to plasma renin activity levels, Ang II levels, or renal function. ADSCs treatment attenuated the blood pressure and also ameliorated the other effects of LPS-treated adult offspring. CONCLUSIONS Prenatal exposure to LPS activates the intrarenal RAS but not the circulating RAS and thus induces increases in blood pressure in adult offspring; however, ADSCs treatment attenuates the blood pressure increases resulting from LPS exposure and also ameliorates the other phenotypic changes induced by LPS treatment by inhibiting intrarenal RAS activation.
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Gu YR, Duan XH, Yang L, Guo LN. Direct C–H Cyanoalkylation of Heteroaromatic N-Oxides and Quinones via C–C Bond Cleavage of Cyclobutanone Oximes. Org Lett 2017; 19:5908-5911. [DOI: 10.1021/acs.orglett.7b02902] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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