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plant immunity

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https://www.readbyqxmd.com/read/29332285/immunity-associated-programmed-cell-death-as-a-tool-for-the-identification-of-genes-essential-for-plant-innate-immunity
#1
Bangjun Zhou, Lirong Zeng
Plants have evolved a sophisticated innate immune system to contend with potential infection by various pathogens. Understanding and manipulation of key molecular mechanisms that plants use to defend against various pathogens are critical for developing novel strategies in plant disease control. In plants, resistance to attempted pathogen infection is often associated with hypersensitive response (HR), a form of rapid programmed cell death (PCD) at the site of attempted pathogen invasion. In this chapter, we describe a method for rapid identification of genes that are essential for plant innate immunity...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29330319/correction-a-plant-derived-nucleic-acid-reconciles-type-i-ifn-and-a-pyroptotic-like-event-in-immunity-against-respiratory-viruses
#2
Dacquin M Kasumba, Takara Hajake, Seong-Wook Oh, Sergei V Kotenko, Hiroki Kato, Takashi Fujita
No abstract text is available yet for this article.
January 12, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29329644/anticancer-carbazole-alkaloids-and-coumarins-from-clausena-plants-a-review
#3
REVIEW
Li Huang, Zhe-Ling Feng, Yi-Tao Wang, Li-Gen Lin
Pharmaceutical research has focused on the discovery and development of anticancer drugs. Clinical application of chemotherapy drugs is limited due to their severe side effects. In this regard, new naturally occurring anticancer drugs have gained increasing attention because of their potential effectiveness and safety. Fruits and vegetables are promising sources of anticancer remedy. Clausena (family Rutaceae) is a genus of flowering plants and includes several kinds of edible fruits and vegetables. Phytochemical and pharmacological studies show that carbazole alkaloids and coumarins from Clausena plants exhibit anticancer activity...
December 2017: Chinese Journal of Natural Medicines
https://www.readbyqxmd.com/read/29329405/solanaceous-exocyst-subunits-are-involved-in-immunity-to-diverse-plant-pathogens
#4
Yu Du, Elysa J R Overdijk, Jeroen A Berg, Francine Govers, Klaas Bouwmeester
The exocyst, a multiprotein complex consisting of eight subunits, plays an essential role in many biological processes by mediating secretion of post-Golgi-derived vesicles towards the plasma membrane. In recent years, roles for plant exocyst subunits in pathogen defence have been uncovered, largely based on studies in the model plant Arabidopsis. Only a few studies have been undertaken to assign the role of exocyst subunits in plant defence in other plants species, including crops. In this study, predicted protein sequences from exocyst subunits were retrieved by mining databases from the Solanaceous plants Nicotiana benthamiana, tomato, and potato...
January 10, 2018: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29327438/establishing-rna-virus-resistance-in-plants-by-harnessing-crispr-immune-system
#5
Tong Zhang, Qiufeng Zheng, Xin Yi, Hong An, Yaling Zhao, Siqi Ma, Guohui Zhou
Recently, CRISPR-Cas (clustered, regularly interspaced short palindromic repeats-CRISPR associated proteins) system has been used to produce plants resistant to DNA virus infections. However, there is no RNA virus control method in plants that uses CRISPR-Cas system to target the viral genome directly. Here we reprogrammed the CRISPR-Cas9 system from Francisella novicida to confer molecular immunity against RNA viruses in Nicotiana benthamiana and Arabidopsis plants. Plants expressing FnCas9 and sgRNA specific for the cucumber mosaic virus (CMV) or tobacco mosaic virus (TMV) exhibited significantly attenuated virus infection symptoms and reduced viral RNA accumulation...
January 11, 2018: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/29327329/microrna-mediated-r-gene-regulation-molecular-scabbards-for-double-edged-swords
#6
REVIEW
Yingtian Deng, Minglei Liu, Xiaofei Li, Feng Li
Plant resistance (R) proteins are immune receptors that recognize pathogen effectors and trigger rapid defense responses, namely effector-triggered immunity. R protein-mediated pathogen resistance is usually race specific. During plant-pathogen coevolution, plant genomes accumulated large numbers of R genes. Even though plant R genes provide important natural resources for breeding disease-resistant crops, their presence in the plant genome comes at a cost. Misregulation of R genes leads to developmental defects, such as stunted growth and reduced fertility...
January 9, 2018: Science China. Life Sciences
https://www.readbyqxmd.com/read/29325990/quantitative-proteomics-reveals-a-role-of-jaz7-in-plant-defense-response-to-pseudomonas-syringae-dc3000
#7
Tong Zhang, Li Meng, Wenwen Kong, Zepeng Yin, Yang Wang, Jacqueline D Schneider, Sixue Chen
Jasmonate ZIM-domain (JAZ) proteins are key transcriptional repressors regulating various biological processes. Although many studies have studied JAZ proteins by genetic and biochemical analyses, little is known about JAZ7-associated global protein networks and how JAZ7 contributes to bacterial pathogen defense. In this study, we aim to fill this knowledge gap by conducting unbiased large-scale quantitative proteomics using tandem mass tags (TMT). We compared the proteomes of a JAZ7 knock-out line, a JAZ7 overexpression line, as well as the wild type Arabidopsis plants in the presence and absence of Pseudomonas syringae DC3000 infection...
January 8, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29325915/in-vivo-nonspecific-immunomodulatory-and-antispasmodic-effects-of-common-purslane-portulaca-oleracea-linn-leaf-extracts-in-icr-mice
#8
Elena S Catap, Markyn Jared L Kho, Maria Rexie R Jimenez
ETHNOPHARMACOLOGICAL RELEVANCE: Portulaca oleracea (common purslane) is used in traditional medicine to cure various illnesses. However, its immune-protective properties and antispasmodic effects still need more pharmacological data if the plant will be utilized in herbal and drug formulations. Therefore, the present study determined the capacity of this plant species to modulate nonspecific immune responses and to confirm its antispasmodic activity in vivo in ICR mice. MATERIALS AND METHODS: Phagocytic activity of peritoneal macrophage, splenic lymphocyte proliferation and plasma lysozyme levels were measured in mice that were immunosuppressed using cyclophosphamide and treated with the ethyl acetate extract of Portulaca oleracea...
January 8, 2018: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/29323436/molecular-characterization-and-gene-silencing-of-laccase-1-in-the-grain-aphid-sitobion-avenae
#9
Yong Zhang, Jia Fan, Frédéric Francis, Julian Chen
Laccase 1 (Lac1), a polyphenol oxidase, has been proposed to be involved in insect iron metabolism and immunity responses. However, little information is available on the roles of Lac 1 in insect-plant interactions. The grain aphid Sitobion avenae is one of the most destructive pests of cereal, directly drawing phloem sap and transmitting viruses. In the present study, we first cloned the open reading frame (ORF) of Lac 1 from S. avenae, and the putative protein sequence was predicted to have a carboxyl-terminal transmembrane domain...
January 11, 2018: Archives of Insect Biochemistry and Physiology
https://www.readbyqxmd.com/read/29322427/immunophenotyping-of-pediatric-brain-tumors-correlating-immune-infiltrate-with-histology-mutational-load-and-survival-and-assessing-clonal-t-cell-response
#10
Ashley S Plant, Shohei Koyama, Claire Sinai, Isaac H Solomon, Gabriel K Griffin, Keith L Ligon, Pratiti Bandopadhayay, Rebecca Betensky, Ryan Emerson, Glenn Dranoff, Mark W Kieran, Jerome Ritz
There is little known regarding the immune infiltrate present in pediatric brain tumors and how this compares to what is known about histologically similar adult tumors and its correlation with survival. Here, we provide a descriptive analysis of the immune infiltrate of 22 fresh pediatric brain tumor tissue samples of mixed diagnoses and 40 peripheral blood samples. Samples were analyzed using a flow cytometry panel containing markers for immune cell subtypes, costimulatory markers, inhibitory signals, and markers of activation...
January 10, 2018: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/29322016/evaluation-of-in%C3%A2-vitro-and-in%C3%A2-vivo-antileishmanial-potential-of-bergenin-rich-bergenia-ligulata-wall-engl-root-extract-against-visceral-leishmaniasis-in-inbred-balb-c-mice-through-immunomodulation
#11
Rupinder Kaur, Sukhbir Kaur
Background: Medicinal plants with immunomodulatory properties can provide good alternative therapeutics for curing visceral leishmaniasis. Bergenia ligulata (Wall.) Engl. is an interesting plant with strong antioxidant, antimicrobial, immunomodulatory and hepatoprotective properties. Aim: The present study was planned to determine the antileishmanial activity of plant extract by modulating the immune responses of inbred BALB/c mice. Methodology: Bergenin, the principle active component of B...
January 2018: Journal of Traditional and Complementary Medicine
https://www.readbyqxmd.com/read/29321675/overexpression-of-a-constitutively-active-truncated-form-of-oscdpk1-confers-disease-resistance-by-affecting-ospr10a-expression-in-rice
#12
Siou-Luan He, Jian-Zhi Jiang, Bo-Hong Chen, Chun-Hsiang Kuo, Shin-Lon Ho
The rice pathogenesis-related protein OsPR10a was scarcely expressed in OsCDPK1-silenced (Ri-1) rice, which was highly sensitive to pathogen infection. After inoculating the leaves with bacterial blight (Xanthomonas oryzae pv. oryzae; Xoo), we found that the expression of OsPR10a was up- and down-regulated in OEtr-1 (overexpression of the constitutively active truncated form of OsCDPK1) and Ri-1 rice plants, respectively. OsPR10a and OsCDPK1 showed corresponding expression patterns and were up-regulated in response to the jasmonic acid, salicylic acid and Xoo treatments, and OsPR1 and OsPR4 were significantly up-regulated in OEtr-1...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321648/comparative-analysis-of-mirna-expression-profiles-in-transgenic-and-non-transgenic-rice-using-mirna-seq
#13
Cheng Peng, Xiaoyun Chen, Xiaofu Wang, Xiaoli Xu, Wei Wei, Congmao Wang, Junfeng Xu
Safety assessment for genetically modified organisms (GMOs) is required before their release. To date, miRNAs that play important roles in eukaryotic gene regulation have not been considered in the current assessment system. In this study, we identified 6 independent Bt and EPSPS GM rice lines using PCR and immune strip. We analyzed the expression levels of Cry1Ac and EPSPS using quantitative real-time PCR and western blot. Further, miRNAs from the developing seeds of the 6 GM rice lines and the wild-type line were investigated using deep sequencing and bioinformatic approaches...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29320478/an-extracellular-network-of-arabidopsis-leucine-rich-repeat-receptor-kinases
#14
Elwira Smakowska-Luzan, G Adam Mott, Katarzyna Parys, Martin Stegmann, Timothy C Howton, Mehdi Layeghifard, Jana Neuhold, Anita Lehner, Jixiang Kong, Karin Grünwald, Natascha Weinberger, Santosh B Satbhai, Dominik Mayer, Wolfgang Busch, Mathias Madalinski, Peggy Stolt-Bergner, Nicholas J Provart, M Shahid Mukhtar, Cyril Zipfel, Darrell Desveaux, David S Guttman, Youssef Belkhadir
The cells of multicellular organisms receive extracellular signals using surface receptors. The extracellular domains (ECDs) of cell surface receptors function as interaction platforms, and as regulatory modules of receptor activation. Understanding how interactions between ECDs produce signal-competent receptor complexes is challenging because of their low biochemical tractability. In plants, the discovery of ECD interactions is complicated by the massive expansion of receptor families, which creates tremendous potential for changeover in receptor interactions...
January 10, 2018: Nature
https://www.readbyqxmd.com/read/29317252/flavonoids-and-the-gastrointestinal-tract-local-and-systemic-effects
#15
REVIEW
P I Oteiza, C G Fraga, D A Mills, D H Taft
The gastrointestinal (GI) tract plays a central role in the absorption, distribution, metabolism, and excretion of flavonoids, which ultimately define the health effects of these bioactives. These aspects are modulated by the interactions of flavonoids with other dietary components, environmental factors, the host, and the GI microbiota. Flavonoid can target molecules in the luminal content, the different GI tract cell types, and the microbiota. Importantly, flavonoid actions at the GI tract can have an impact systemically, e...
January 6, 2018: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/29317072/betacaryophyllene-a-phytocannabinoid-as-potential-therapeutic-modality-for-human-sepsis
#16
Angel Meza, Christian Lehmann
Sepsis is a clinical condition resulting from a dysregulated immune response to an infection that leads to organ dysfunction. Despite numerous efforts to optimize treatment, sepsis remains to be the main cause of death in most intensive care units. The endogenous cannabinoid system (ECS) plays an important role in inflammation. Cannabinoid receptor 2 (CB2R) activation is immunosuppressive, which might be beneficial during the hyper-inflammatory phase of sepsis. Beta-caryophyllene (BCP) is a non-psychoactive natural cannabinoid (phytocannabinoid) found in Cannabis sativa and in essential oils of spices and food plants, that acts as a selective agonist of CB2R...
January 2018: Medical Hypotheses
https://www.readbyqxmd.com/read/29313103/plant-synthetic-gp4-and-gp5-proteins-from-porcine-reproductive-and-respiratory-syndrome-virus-elicit-immune-responses-in-pigs
#17
Chul Han An, Salik Nazki, Sung-Chul Park, Yu Jeong Jeong, Ju Huck Lee, Su-Jin Park, Amina Khatun, Won-Il Kim, Youn-Il Park, Jae Cheol Jeong, Cha Young Kim
We demonstrated successful overexpression of porcine reproductive and respiratory syndrome virus (PRRSV)-derived GP4D and GP5D antigenic proteins in Arabidopsis. Pigs immunized with transgenic plants expressing GP4D and GP5D proteins generated both humoral and cellular immune responses to PRRSV. Porcine reproductive and respiratory syndrome virus (PRRSV) causes PRRS, the most economically significant disease affecting the swine industry worldwide. However, current commercial PRRSV vaccines (killed virus or modified live vaccines) show poor efficacy and safety due to concerns such as reversion of virus to wild type and lack of cross protection...
January 8, 2018: Planta
https://www.readbyqxmd.com/read/29305990/effect-of-yeast-xanthophyllomyces-dendrorhous-and-plant-saint-john-s-wort-lemon-balm-and-rosemary-extract-based-functional-diets-on-antioxidant-and-immune-status-of-atlantic-salmon-salmo-salar-subjected-to-crowding-stress
#18
Sebastián Reyes-Cerpa, Eva Vallejos-Vidal, María José Gonzalez-Bown, Jonathan Morales-Reyes, Diego Pérez-Stuardo, Deborah Vargas, Mónica Imarai, Víctor Cifuentes, Eugenio Spencer, Ana María Sandino, Felipe E Reyes-López
Salmon farming may face stress due to the intensive culture conditions with negative impacts on overall performance. In this aspect, functional feed improves not only the basic nutritional requirements but also the health status and fish growth. However, to date no studies have been carried out to evaluate the effect of functional diets in salmon subjected to crowding stress. Thus, the aim of this study was to evaluate the effect of yeast (Xanthophyllomyces dendrorhous; diet A) and the combination of plant extracts (common Saint John's wort, lemon balm, and rosemary; diet B) on the antioxidant and immune status of Atlantic salmon grown under normal cultured conditions and then subjected to crowding stress...
January 3, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29301551/rna-virus-interference-via-crispr-cas13a-system-in-plants
#19
Rashid Aman, Zahir Ali, Haroon Butt, Ahmed Mahas, Fatimah Aljedaani, Muhammad Zuhaib Khan, Shouwei Ding, Magdy Mahfouz
BACKGROUND: CRISPR/Cas systems confer immunity against invading nucleic acids and phages in bacteria and archaea. CRISPR/Cas13a (known previously as C2c2) is a class 2 type VI-A ribonuclease capable of targeting and cleaving single-stranded RNA (ssRNA) molecules of the phage genome. Here, we employ CRISPR/Cas13a to engineer interference with an RNA virus, Turnip Mosaic Virus (TuMV), in plants. RESULTS: CRISPR/Cas13a produces interference against green fluorescent protein (GFP)-expressing TuMV in transient assays and stable overexpression lines of Nicotiana benthamiana...
January 4, 2018: Genome Biology
https://www.readbyqxmd.com/read/29300825/the-arabidopsis-thaliana-non-specific-phospholipase-c2-is-involved-in-the-response-to-pseudomonas-syringae-attack
#20
Zuzana Krcková, Daniela Kocourková, Michal Danek, Jitka Brouzdová, Premysl Pejchar, Martin Janda, Igor Pokotylo, Peter G Ott, Olga Valentová, Jan Martinec
Background and Aims: The non-specific phospholipase C (NPC) is a new member of the plant phospholipase family that reacts to abiotic environmental stresses, such as phosphate deficiency, high salinity, heat and aluminium toxicity, and is involved in root development, silicon distribution and brassinolide signalling. Six NPC genes (NPC1-NPC6) are found in the Arabidopsis genome. The NPC2 isoform has not been experimentally characterized so far. Methods: The Arabidopsis NPC2 isoform was cloned and heterologously expressed in Escherichia coli...
December 29, 2017: Annals of Botany
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