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Identification of plant genes putatively involved in the perception of fungal ergosterol-squalene^∞

Journal of Integrative Plant Biology 2020年第7期62卷 927-947页

作者： Laura Lindo Rosa E.Cardoza Alicia Lorenzana pedro a.casquero Santiago Gutiérrez Area of Microbiology University of LeónCampus of PonferradaPonferradaSpain University Group of Research in Engineering and Sustainable Agriculture University of LeónLeónSpain

Trichoderma biocontrol strains establish a complex network of interactions with plants,in which diverse fungal molecules are involved in the recognition of these fungi as nonpathogenic organisms.These molecules act as microbial-associated molecular patterns that trigger plant responses.Previous studies have reported the im-portance of ergosterol produced by Trichoderma spp.for the ability of these fungi to induce plant growth and de-fenses.In addition,squalene,a sterol biosynthetic inter-mediate,seems to play an important role in these inter-actions.Here,we analyzed the effect of different concentrations of ergosterol and squalene on tomato(Solanum lycopersicum)growth and on the transcription level of defense-and growth-related genes.We used an RNA-seq strategy to identify several tomato genesencoding predicted pattern recognition receptor proteins or WRKY transcription factors,both of which are puta-tively involved in the perception and response to ergo-sterol and squalene.Finally,an analysis of Arabidopsis thaliana mutants lacking the genes homologous to these tomato candidates led to the identification of a WRKY40 transcription factor that negatively regulates salicylic acid-related genes and positively regulates ethylene-and jasmonate-related genes in the presence of ergosterol and squalene.

关键词： plant perception pattern

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A prospective analysis of factors that influence weight loss in patients undergoing radiotherapy

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Chinese Journal of Cancer 2014年第4期33卷 204-210页

作者： Jon Cacicedo Francisco casquero Lorea Martinez-Indart Olga del Hoyo Alfonso Gomez de Iturriaga Arturo Navarro pedro Bilbao Department of Radiation Oncology Cruces University Hospital Department of Statistics and Epidemiology Cruces University Hospital Department of Radiation Oncology Catalan Institute of OncologyL'Hospitalet de Llobregat

Malnutrition occurs frequently in patients with cancer.Indeed,a variety of nutritional and tumorrelated factors must be taken into account in these patients.Recognizing this relationship,we aimed to prospectively evaluate the risk factors that influence weight loss in patients undergoing radiotherapy with oral nutritional supplementation and dietetic counseling.Weight loss of 74 patients during radiotherapy and 1 month after treatment was analyzed.Parameters such as age,gender,tumor location,tumor stage,Eastern Cooperative Oncology Group performance status(ECOG PS)score,and the use of chemotherapy were analyzed to evaluate their influence on weight loss.All patients underwent oral nutritional supplementation and dietetic counseling.Forty-six(65.7%)patients lost weight,with a mean weight loss of(4.73±3.91)kg,during radiotherapy.At 1 month after treatment,45(66.2%)patients lost weight,presenting a mean weight loss of(4.96±4.04)kg,corresponding to a(6.84±5.24)%net reduction from their baseline weight.Head and neck cancer patients had a mean weight loss of(3.25±5.30)kg,whereas the remaining patients had a mean weight loss of(0.64±2.39)kg(P=0.028)during radiotherapy.In the multivariate analysis,the head and neck tumor location(P=0.005),use of chemotherapy(P=0.011),and ECOG PS score of 2-3(P=0.026)were considered independent risk factors.Nutritional status and parameters,such as tumor location(especially the head and neck),the use of chemotherapy,and the ECOG PS score,should be evaluated before radiotherapy because these factors can influence weight loss during radiotherapy and 1 month after treatment.

关键词：癌症患者放疗减肥头颈部肿瘤平均体重营养不良危险因素营养补充

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