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https://www.readbyqxmd.com/read/29150546/differential-regulation-of-two-tiered-plant-immunity-and-sexual-reproduction-by-anxur-receptor-like-kinases
#1
Hyunggon Mang, Baomin Feng, Zhangjian Hu, Aurelien Boisson-Dernier, Christina Franck, Xiangzong Meng, Yanyan Huang, Jinggeng Zhou, Guangyuan Xu, Taotao Wang, Libo Shan, Ping He
Plants have evolved two tiers of immune receptors to detect infections: cell surface-resident pattern recognition receptors (PRRs) that sense microbial signatures and intracellular nucleotide-binding domain leucine-rich repeat (NLR) proteins that recognize pathogen effectors. How PRRs and NLRs interconnect and activate the specific and overlapping plant immune responses remains elusive. A genetic screen for components controlling plant immunity identified ANXUR1 (ANX1), a malectin-like domain-containing receptor-like kinase, together with its homolog ANX2, as important negative regulators of both PRR- and NLR-mediated immunity in Arabidopsis thaliana...
November 17, 2017: Plant Cell
https://www.readbyqxmd.com/read/29150439/suppression-of-fip200-and-autophagy-by-tumor-derived-lactate-promotes-na%C3%A3-ve-t-cell-apoptosis-and-affects-tumor-immunity
#2
Houjun Xia, Wei Wang, Joel Crespo, Ilona Kryczek, Wei Li, Shuang Wei, Zhaoqun Bian, Tomasz Maj, Mingxiao He, Rebecca J Liu, Youwen He, Ramandeep Rattan, Adnan Munkarah, Jun-Lin Guan, Weiping Zou
Naïve T cells are poorly studied in cancer patients. We report that naïve T cells are prone to undergo apoptosis due to a selective loss of FAK family-interacting protein of 200 kDa (FIP200) in ovarian cancer patients and tumor-bearing mice. This results in poor antitumor immunity via autophagy deficiency, mitochondria overactivation, and high reactive oxygen species production in T cells. Mechanistically, loss of FIP200 disables the balance between proapoptotic and antiapoptotic Bcl-2 family members via enhanced argonaute 2 (Ago2) degradation, reduced Ago2 and microRNA1198-5p complex formation, less microRNA1198-5p maturation, and consequently abolished microRNA1198-5p-mediated repression on apoptotic gene Bak1 Bcl-2 overexpression and mitochondria complex I inhibition rescue T cell apoptosis and promoted tumor immunity...
November 17, 2017: Science Immunology
https://www.readbyqxmd.com/read/29148970/autophagic-cell-death-is-dependent-on-lysosomal-membrane-permeability-through-bax-and-bak
#3
Jason Karch, Tobias G Schips, Bryan D Maliken, Matthew J Brody, Michelle A Sargent, Onur Kanisciak, Jeffery D Molkentin
Cells deficient in the pro-death Bcl-2 family members Bax and Bak are known to be resistant to apoptotic cell death, and previous we have shown that these two effectors are also needed for mitochondrial-dependent cellular necrosis (Karch et al., 2013). Here we show that mouse embryonic fibroblasts deficient in Bax/Bak1 are resistant to the third major form of cell death associated with autophagy through a mechanism involving lysosome permeability. Indeed, specifically targeting Bax only to the lysosome restores autophagic cell death in Bax/Bak1 null cells...
November 17, 2017: ELife
https://www.readbyqxmd.com/read/29144987/benzo-a-pyren-7-8-dihydrodiol-9-10-epoxide-induces-human-trophoblast-swan-71-cell-dysfunctions-due-to-cell-apoptosis-through-disorder-of-mitochondrial-fission-fusion
#4
Weiping Wang, Rong Wang, Qiao Zhang, Gil Mor, Huidong Zhang
Benzo(a)pyren-7,8-dihydrodiol-9,10-epoxide (BPDE) is an endocrine disrupter and ultimate carcinogenic product of benzo(a)pyrene (BaP). Numerous studies have shown that BPDE causes trophoblast-related diseases, such as preeclampsia, growth restriction or miscarriages. However, the underlying mechanism, especially the mitochondria-related BPDE-induced trophoblast dysfunction remains unknown. In this study, we examined mitochondrial functions in BPDE-induced human trophoblast cell line Swan 71. BPDE decreased cell ability, attenuated cell invasion and HCG secretion, induced cell apoptosis, decreased mitochondrial membrane potential, increased reactive oxygen species (ROS) and MDA, and decreased SOD activity in a dose-dependent manner...
November 13, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29122578/a-carvedilol-responsive-microrna-mir-125b-5p-protects-the-heart-from-acute-myocardial-infarction-by-repressing-pro-apoptotic-bak1-and-klf13-in-cardiomyocytes
#5
Ahmed S Bayoumi, Kyoung-Mi Park, Yongchao Wang, Jian-Peng Teoh, Tatsuya Aonuma, Yaoliang Tang, Huabo Su, Neal L Weintraub, Il-Man Kim
BACKGROUND: Cardiac injury is accompanied by dynamic changes in the expression of microRNAs (miRs), small non-coding RNAs that post-transcriptionally regulate target genes. MiR-125b-5p is downregulated in patients with end-stage dilated and ischemic cardiomyopathy, and has been proposed as a biomarker of heart failure. We previously reported that the β-blocker carvedilol promotes cardioprotection via β-arrestin-biased agonism of β1-adrenergic receptor while stimulating miR-125b-5p processing in the mouse heart...
November 7, 2017: Journal of Molecular and Cellular Cardiology
https://www.readbyqxmd.com/read/29099481/viewing-bcl2-and-cell-death-control-from-an-evolutionary-perspective
#6
REVIEW
Andreas Strasser, David L Vaux
The last 30 years of studying BCL2 have brought cell death research into the molecular era, and revealed its relevance to human pathophysiology. Most, if not all metazoans use an evolutionarily conserved process for cellular self destruction that is controlled and implemented by proteins related to BCL2. We propose the anti-apoptotic BCL2-like and pro-apoptotic BH3-only members of the family arose through duplication and modification of genes for the pro-apoptotic multi-BH domain family members, such as BAX and BAK1...
November 3, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/29083116/non-branched-%C3%AE-1-3-glucan-oligosaccharides-trigger-immune-responses-in-arabidopsis
#7
Hugo Mélida, Sara Sopeña-Torres, Laura Bacete, María Garrido-Arandia, Lucía Jordá, Gemma López, Antonio Muñoz, Luis F Pacios, Antonio Molina
Fungal cell walls, essential for environmental adaptation and host colonization, have been evolutionarily selected by plants and animals as a source of Microbe-Associated Molecular Patterns (MAMPs) that upon recognition by host Pattern Recognition Receptors (PRRs) trigger immune responses conferring disease resistance. Chito-oligosaccharides (β-1,4-N-acetylglucosamine oligomers, (GlcNAc)n ) are the only glycosidic structures from fungal walls well-shown to function as MAMPs in plants. Perception of (GlcNAc)4-8 by Arabidopsis involves CERK1, LYK4 and LYK5, three of the eight members of LysM PRR family...
October 30, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29068240/a-verticillium-dahliae-extracellular-cutinase-modulates-plant-immune-responses
#8
Yuejing Gui, Wenqi Zhang, Dandan Zhang, Lei Zhou, Dylan P G Short, Jie Wang, Xuefeng Ma, Tinggang Li, Zhiqiang Kong, Bao-Li Wang, Dan Wang, Nanyang Li, Krishna Subbarao, Jie-Yin Chen, Xiaofeng Dai
Cutinases have been implicated as important enzymes during the process of fungal infection of aerial plant organs. The function of cutinases in the disease cycle of fungal pathogens that invade plants through the roots has been less studied. Here, functional analysis of thirteen cutinase (carbohydrate esterase family 5 domain-containing) genes (VdCUTs) in the highly virulent vascular wilt pathogen Verticillium dahliae Vd991 was performed. Significant sequence divergence in cutinase family members was observed in the genome of V...
October 25, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/29066854/2snp-heritability-and-effects-of-genetic-variants-for-neutrophil-to-lymphocyte-and-platelet-to-lymphocyte-ratio
#9
Bochao Danae Lin, Elena Carnero-Montoro, Jordana T Bell, Dorret I Boomsma, Eco J de Geus, Rick Jansen, Cornelis Kluft, Massimo Mangino, Brenda Penninx, Tim D Spector, Gonneke Willemsen, Jouke-Jan Hottenga
Neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) are important biomarkers for disease development and progression. To gain insight into the genetic causes of variance in NLR and PLR in the general population, we conducted genome-wide association (GWA) analyses and estimated SNP heritability in a sample of 5901 related healthy Dutch individuals. GWA analyses identified a new genome-wide significant locus on the HBS1L-MYB intergenic region for PLR, which replicated in a sample of 2538 British twins...
November 2017: Journal of Human Genetics
https://www.readbyqxmd.com/read/29062863/the-vacuolar-h-atpase-v0-subunit-d2-is-associated-with-chondrocyte-hypertrophy-and-supports-chondrocyte-differentiation
#10
Babatunde A Ayodele, Michiko Mirams, Charles N Pagel, Eleanor J Mackie
Chondrocyte hypertrophy makes important contributions to bone development and growth. We have investigated a number of novel cartilage genes identified in a recent transcriptomic study to determine whether they are differentially expressed between different zones of equine foetal growth cartilage. Twelve genes (ATP6V0D2, BAK1, DDX5, GNB1, PIP4K2A, RAP1B, RPS7, SRSF3, SUB1, TMSB4, TPI1 and WSB2) were found to be more highly expressed in the zone of hypertrophic chondrocytes than in the reserve or proliferative zones, whereas FOXA3 and SERPINA1 were expressed at lower levels in the hypertrophic zone than in the reserve zone...
December 2017: Bone Reports
https://www.readbyqxmd.com/read/29048629/inhibition-of-neuroblastoma-proliferation-by-pf-3758309-a-small-molecule-inhibitor-that-targets-p21-activated-kinase-4
#11
Zhiheng Li, Xiaolu Li, Lixiao Xu, Yanfang Tao, Chun Yang, Xiaolan Chen, Fang Fang, Yi Wu, Xin Ding, He Zhao, Mei Li, Guanghui Qian, Yunyun Xu, Junli Ren, Weiwei Du, Jian Wang, Jun Lu, Shaoyan Hu, Jian Pan
Neuroblastoma is the most common extracranial solid childhood tumor. Despite the availability of advanced multimodal therapy, high-risk patients still have low survival rates. p21-activated kinase 4 (PAK4) has been shown to regulate many cellular processes in cancer cells, including migration, polarization and proliferation. However, the role of PAK4 in neuroblastoma remains unclear. In the present study, we demonstrated that PAK4 was overexpressed in neuroblastoma tissues and was correlated with tumor malignance and prognosis...
September 22, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29028796/bak1-is-involved-in-atralf1-induced-inhibition-of-root-cell-expansion
#12
Keini Dressano, Paulo H O Ceciliato, Aparecida L Silva, Juan Carlos Guerrero-Abad, Tábata Bergonci, Fausto Andrés Ortiz-Morea, Marco Bürger, Marcio C Silva-Filho, Daniel S Moura
The rapid alkalinization factor (RALF) peptide negatively regulates cell expansion, and an antagonistic relationship has been demonstrated between AtRALF1, a root-specific RALF isoform in Arabidopsis, and brassinosteroids (BRs). An evaluation of the response of BR signaling mutants to AtRALF1 revealed that BRI1-associated receptor kinase1 (bak1) mutants are insensitive to AtRALF1 root growth inhibition activity. BAK1 was essential for the induction of AtRALF1-responsive genes but showed no effect on the mobilization of Ca2+ and alkalinization responses...
October 2017: PLoS Genetics
https://www.readbyqxmd.com/read/29023762/tolerance-of-olive-olea-europaea-cv-frantoio-to-verticillium-dahliae-relies-on-both-basal-and-pathogen-induced-differential-transcriptomic-responses
#13
María de la O Leyva-Pérez, Jaime Jiménez-Ruiz, Carmen Gómez-Lama Cabanás, Antonio Valverde-Corredor, Juan B Barroso, Francisco Luque, Jesús Mercado-Blanco
Verticillium wilt of olive (VWO) is one of the most serious biotic constraints for this tree crop. Our knowledge of the genetics of the tolerance/resistance to this disease is very limited. Here we show that tolerance of the cv Frantoio relies on both basal and early pathogen-induced differential transcriptomic responses. A comparative transcriptomic analysis (RNA-seq) was conducted in root tissues of cvs Frantoio (VWO-tolerant) and Picual (VWO-susceptible). RNA samples originated from roots of inoculated olive plants during the early infection stages by Verticillium dahliae (highly virulent, defoliating pathotype)...
October 12, 2017: New Phytologist
https://www.readbyqxmd.com/read/28987347/association-study-of-apoptosis-gene-polymorphisms-in-mitochondrial-diabetes-a-potential-role-in-the-pathogenicity-of-md
#14
Mouna Tabebi, Bodour Khabou, Hanen Boukadi, Mariam Ben Hamad, Bochra Ben Rhouma, Slim Tounsi, Abdellatif Maalej, Hassen Kamoun, Leila Keskes-Ammar, Mohamed Abid, Mouna Mnif, Faiza Fakhfakh
Mitochondrial diabetes (MD) is a heterogeneous disorder characterized by a chronic hyperglycemia and is maternally transmitted. Syndromic MD is a subgroup of MD including diabetic microangiopathy and macroangiopathy, in addition to extrapancreatic disorder. MD is caused by genetic mutations and deletions affecting mitochondrial DNA. This mitochondrial damage initiates apoptosis. In this study, we hypothesized that functional polymorphisms in genes involved in apoptotic pathway could be associated with the development of apoptosis in MD disease and increased its risk...
October 4, 2017: Gene
https://www.readbyqxmd.com/read/28902164/slbir3-negatively-regulates-pamp-responses-and-cell-death-in-tomato
#15
Shuhua Huang, Shuming Nie, Shufen Wang, Jianwei Liu, Yanfeng Zhang, Xiaofeng Wang
Bri1-associated kinase 1 (BAK1)-interacting receptor-like kinase (BIR) proteins have been shown to play important roles in regulating growth and development, pathogen associated molecular pattern (PAMP)-triggered immunity (PTI) responses, and cell death in the model plant, Arabidopsis thaliana. We identified four BIR family members in tomato (Solanum lycopersicum), including SlBIR3, an ortholog of AtBIR3 from A. thaliana. SlBIR3 is predicted to encode a membrane localized non-arginine-aspartate (non-RD) kinase that, based on protein sequence, does not have autophosphorylation activity but that can be phosphorylated in vivo...
September 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28859619/analysis-of-dna-methylation-in-chondrocytes-in-rats-with-knee-osteoarthritis
#16
Xinxin Wang, Dezhi Tang, Peng Shen, Hao Xu, Hongfu Qiu, Tao Wu, Xiang Gao
BACKGROUND: Knee osteoarthritis (KOA) is a degenerative knee disease commonly found in the ageing population. DNA methylation works with histone acetylation to participate in aging. Alterations of DNA methylation may involve the joint chondrocyte degeneration in KOA. The aim of this study is to detect DNA methylation changes in chondrocytes of rats with KOA. METHODS: The rat KOA model was established with the Hulth method (n = 10), while rats receiving sham operation served as the control (n = 10)...
August 31, 2017: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/28842532/the-arabidopsis-leucine-rich-repeat-receptor-kinase-bir3-negatively-regulates-bak1-receptor-complex-formation-and-stabilizes-bak1
#17
Julia Imkampe, Thierry Halter, Shuhua Huang, Sarina Schulze, Sara Mazzotta, Nikola Schmidt, Raffaele Manstretta, Sandra Postel, Michael Wierzba, Yong Yang, Walter M A M van Dongen, Mark Stahl, Cyril Zipfel, Michael B Goshe, Steven Clouse, Sacco C de Vries, Frans Tax, Xiaofeng Wang, Birgit Kemmerling
BAK1 is a coreceptor and positive regulator of multiple ligand binding leucine-rich repeat receptor kinases (LRR-RKs) and is involved in brassinosteroid (BR)-dependent growth and development, innate immunity, and cell death control. The BAK1-interacting LRR-RKs BIR2 and BIR3 were previously identified by proteomics analyses of in vivo BAK1 complexes. Here, we show that BAK1-related pathways such as innate immunity and cell death control are affected by BIR3 in Arabidopsis thaliana BIR3 also has a strong negative impact on BR signaling...
September 2017: Plant Cell
https://www.readbyqxmd.com/read/28839160/functional-characterisation-of-brassinosteroid-receptor-mtbri1-in-medicago-truncatula
#18
Xiaofei Cheng, Xiaoping Gou, Hongju Yin, Kirankumar S Mysore, Jia Li, Jiangqi Wen
Brassinosteroids are phytohormones involved in plant development and physiological processes. Brassinosteroids Insensitive 1 (BRI1) is required for BR perception and initiation of subsequent signal transduction in Arabidopsis. In this study, the orthologue of BRI1 in the model legume species Medicago truncatula, MtBRI1, was identified and characterised. Three allelic Tnt1 insertion mutants, mtbri1-1, mtbri1-2, and mtbri1-3, were obtained from the M. truncatula Tnt1 insertion population. mtbri1 mutants displayed characteristic bri1 mutant phenotypes: extreme dwarfness, dark green curled leaves, short primary roots, less lateral roots, and insensitive to exogenous brassinolide (BL)...
August 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28815300/holaphyllamine-a-steroid-is-able-to-induce-defense-responses-in-arabidopsis-thaliana-and-increases-resistance-against-bacterial-infection
#19
Abderrakib Zahid, Rim Jaber, Ferdousse Laggoun, Arnaud Lehner, Isabelle Remy-Jouet, Olivier Pamlard, Sandra Beaupierre, Jérome Leprince, Marie-Laure Follet-Gueye, Maïté Vicré-Gibouin, Xavier Latour, Vincent Richard, Catherine Guillou, Patrice Lerouge, Azeddine Driouich, Jean-Claude Mollet
A chemical screen of plant-derived compounds identified holaphyllamine, a steroid, able to trigger defense responses in Arabidopsis thaliana and improve resistance against the pathogenic bacterium Pseudomonas syringae pv tomato DC3000. A chemical screen of 1600 plant-derived compounds was conducted and allowed the identification of a steroid able to activate defense responses in A. thaliana at a concentration of 1 µM without altering growth. The identified compound is holaphyllamine (HPA) whose chemical structure is similar to steroid pregnanes of mammals...
December 2017: Planta
https://www.readbyqxmd.com/read/28814964/milk-disrupts-p53-and-dnmt1-the-guardians-of-the-genome-implications-for-acne-vulgaris-and-prostate-cancer
#20
Bodo C Melnik
There is accumulating evidence that milk shapes the postnatal metabolic environment of the newborn infant. Based on translational research, this perspective article provides a novel mechanistic link between milk intake and milk miRNA-regulated gene expression of the transcription factor p53 and DNA methyltransferase 1 (DNMT1), two guardians of the human genome, that control transcriptional activity, cell survival, and apoptosis. Major miRNAs of milk, especially miRNA-125b, directly target TP53 and complex p53-dependent gene regulatory networks...
2017: Nutrition & Metabolism
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