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Arabidopsis Squalene Epoxidase 3 （SQE3） Complements SQE1 and Is Important for Embryo Development and Bulk Squalene Epoxidase Activity

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Molecular Plant 2015年第7期8卷 1090-1102页

作者： Sara Laranjeira Vitor Amorim-Silva Alicia Esteban Monserrat Arro Albert Ferrer rui manuel tavares Miguel Angel Botella Abel Rosado Herlander Azevedo Center for Biodiversity Functional & Integrative Genomics (BioFIG) Plant Functional Biology Center University of Minho Campus de Gualtar 4710-057 BragaPortugal Instituto de Hortofruticultura Subtropical y Mediterranea 'La Mayora' Universidad de Malaga-Consejo Superior de Investigaciones Cientificas (IHSM-UMA-CSIC)Departmento de Biologia Molecular y Bioquimica Universidad de Malaga Campus Teatinos 29071 Malaga Spain Department of Molecular Genetics Centre for Research in Agricultural Genomics (CSIC-IRTA-UAB-UB) Bellaterra-Cerdanyola del Valles 08193 Spain Department of Biochemistry and Molecular Biology Faculty of Pharmacy University of Barcelona 08028 Barcelona Spain Canada Research Chair in Plant Physiology and Cellular Dynamics Department of Botany Faculty of Sciences University of British Columbia VancouverBC V6T 1Z4 Canada CIBIO InBIO - Research Network in Biodiversity and Evolutionary Biology Universidade do Porto Campus Agrario de Vairao 4485-661 Vairao Portugal

The existence of multigenic families in the mevalonate pathway suggests divergent functional roles for pathway components involved in the biosynthesis of plant sterols. Squalene epoxidases （SQEs） are key components of this pathway, and Squalene Epoxidase 1 （SQE1） has been identified as a fundamental enzyme in this biosynthetic step. In the present work, we extended the characterization of the remaining SQE family members, phylogenetically resolving between true SQEs and a subfamily of SQE-like proteins that is exclusive to Brassicaceae. Functional characterization of true SQE family members, Squalene Epox- idase 2 （SQE2） and Squalene Epoxidase 3 （SQE3）, indicates that SQE3, but not SQE2, contributes to the bulk SQE activity in Arabidopsis, with sqe3-1 mutants accumulating squalene and displaying sensitivity to ter- binafine. We genetically demonstrated that SQE3 seems to play a particularly significant role in embryo development. Also, SQE1 and SQE3 both localize in the endoplasmic reticulum, and SQE3 can functionally complement SQEI. Thus, SQE1 and SQE3 seem to be two functionally unequal redundant genes in the pro- motion of plant SQE activity in Arabidopsis.

关键词： Arabidopsis embryo development MVA pathway squalene epoxidase sterol biosynthesis

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HIPPOCRATES®project:A proof of concept of a collaborative program for hepatitis C virus micro-elimination in a prison setting

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World Journal of Hepatology 2020年第12期12卷 1314-1325页

作者： rui Gaspar Rodrigo Liberal Jorge tavares rui Morgado Guilherme Macedo Department of Gastroenterology Centro Hospitalar de São JoãoPorto 4200Portugal Department of Gastroenterology and Hepatology Centro Hospitalar de São JoãoPorto 4200Portugal Estabelecimento Prisional do Porto Porto 4200Portugal

BACKGROUND In the last few years we have witnessed a revolution in the treatment of hepatitis C virus(HCV)*** the introduction of direct-acting antiviral agents(DAAs),sustained virological response(SVR)is achieved in more than 95%of the *** focus is now being turned to the global targets set by the World Health Organization,with the aim of achieving HCV elimination by *** inmates constitute one of the high-risk groups,and receive treatment less frequently due to several barriers in access to health *** To describe the management and follow-up of a cohort of HCV monoinfected patients treated with DAA in the prison setting,where tertial referral liver center specialists locally provide,on-site assessment and treatment for the *** A prospective observational study was conducted from April 2017 to March 2020,which included all HCV monoinfected prison inmates in the largest Northern Portugal ***,clinical,and laboratory data,as well as transient elastography measurements,were collected onsite by the medical team and prospectively *** were treated with DAA according to international *** primary endpoint was SVR at post-treatment week *** There were 98 monoinfected HCV male inmates(mean age,42.7±8.6 years)included in the *** drugs or tattooing were reported in 74.5%,with 38.8%of the latter being done in *** consumption of more than 30 g/d was referred in 69.4%.The most prevalent genotype was 1a(54.1%),followed by 3(27.6%),4(9.2%)and 1b(6.1%).Pretreatment fibrosis degree was mild-tomoderate(F0-F2)in 77.6%and severe in 22.4%(F3-F4).Treatment regimens chosen were:45.9%elbasvir/grazoprevir,29.6%sofosbuvir/velpatasvir,and 12.2%sofosbuvir/ledispavir and glecaprevir/*** major adverse events were *** at post-treatment week 12 was 99%.CONCLUSION In a population considered to be both hard-to-access and a cornerstone for HCV elimination,the onsit

关键词： Hepatitis C infection Treatment Prison setting Direct-acting antiviral agents Micro-elimination

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Comparison of morphological and functional outcomes of mouse sciatic nerve repair with three biodegradable polymer conduits containing poly (lactic acid)

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Neural Regeneration Research 2018年第10期13卷 1811-1819页

作者： Fernanda Marques Pestana rui C.C.Domingues Júlia Teixeira Oliveira Daniela F.P.A.Durco Camila Oliveira Goulart Henrique Rocha Mendonca Anne Caroline Rodrigues dos Santos Natália tavares de Campos Beatriz Theodoro da Silva Cristina Cardoso Pereira Cristiano Piacsek Borges Ana Maria Blanco Martinez Pós Graduacao em Ciências Morfológicas Instituto de Ciências Biomédicas-UFRJRio de Janeiro RJ Brazil Anatomia Patológica-Faculdade de Medicina-HUCFF-UFRJ Rio de Janeiro RJ Brazil Laboratório de Neurodegeneracao e Reparo-Faculdade de Medicina-HUCFF-UFRJ Rio de Janeiro RJ Brazil Programa de Eng. Química COPPE-UFRJRio de Janeiro Brazil Polo Universitário de Macaé Laboratório Integrado de Produtos Bioativos e BiociênciasMacaê UFRJ Brazil

Poly（lactic acid）（PLA）-containing nerve guidance conduits（NGCs） are currently being investigated for nerve repair as an alternative to autograft, which leads to permanent functional impairment in the territory innervated by the removed nerve. Combination of polymers modifies the physical properties of the conduits, altering their nerve-guidance properties. Conduits made from PLA-only or combined with other polymers have been used successfully for nerve repair, but their efficiency has not been compared. We compared the morphological and functional outcomes of peripheral nerve repair by using NGCs made of poly（lactic acid） and combined or not with polycaprolactone（PLA/PCL） or polyvinylpyrrolidone（PLA/PVP）. To assess the functional recovery, we employed a mechanical hyperalgesia analysis, sciatic functional index（SFI）, and electroneuromyography. The mechanical hyperalgesia analysis showed that the PLA group improved more rapidly than the PLA/PVP and PLA/PCL groups; similarly, in the electroneuromyography assay, the PLA group exhibited higher amplitude than the PLA/PCL and PLA/PVP groups. However, the SFI improvement rates did not differ among the groups. Morphologically, the PLA group showed more vascularization, while the nerve fiber regeneration did not differ among the groups. In conclusion, the PLA-only conduits were superior to the other NGCs tested for nerve repair.

关键词： sciatic nerve tubulization biodegradable conduit poly(lactic acid) regeneration

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