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https://www.readbyqxmd.com/read/28933078/-advance-in-biosynthesis-of-terpenoid-indole-alkaloids-and-its-regulation-in-catharanthus-roseus
#1
Xue-Jun Kuang, Cai-Xia Wang, Li-Qiu Zou, Xiao-Xuan Zhu, Chao Sun
Catharanthus roseus can produce a variety of terpenoid indole alkaloids (TIA), most of which exhibit strong pharmacological activities. Hence, biosynthesis and regulation of TIA have received recent attention. 3α (S)-strictosidine is an important node in TIA biosynthesis, which is a condensation product of secologanin and tryptamine. The former is produced in iridoid pathway, and the latter is produced in indole pathway. Vindoline and catharanthine, which are produced respectively by 3α (S)-strictosidine via multi-step enzymatic reaction, can form α-3, 4-anhydrovinblastine by the condensation reaction...
November 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28928755/different-preclimacteric-events-in-apple-cultivars-with-modified-ripening-physiology
#2
Vikram Singh, Asya Weksler, Haya Friedman
"Anna" is an early season apple cultivar exhibiting a fast softening and juiciness loss during storage, in comparison to two mid-late season cultivars "Galaxy" and "GD." The poor storage capacity of "Anna" was correlated with high lipid oxidation-related autoluminescence, high respiration and ethylene production rates, associated with high expression of MdACO1, 2, 4, 7, and MdACS1. All cultivars at harvest responded to exogenous ethylene by enhancing ethylene production, typical of system-II. The contribution of pre-climacteric events to the poor storage capacity of "Anna" was examined by comparing respiration and ethylene production rates, response to exogenous ethylene, expression of genes responsible for ethylene biosynthesis and response, and developmental regulators in the three cultivars throughout fruit development...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28916654/biallelic-dicer1%C3%A2-loss-mediated-by-ap2-cre-drives-angiosarcoma
#3
Jason A Hanna, Catherine J Drummond, Matthew R Garcia, Jonathan C Go, David Finkelstein, Jerold E Rehg, Mark E Hatley
Angiosarcoma is an aggressive vascular sarcoma with an extremely poor prognosis. Due to the relative rarity of this disease, its molecular drivers and optimal treatment strategies are obscure. DICER1 is an RNase III endoribonuclease central to microRNA biogenesis, and germline DICER1 mutations result in a cancer predisposition syndrome, associated with an increased risk of many tumor types. Here we show that biallelic Dicer1 deletion with aP2-Cre drives aggressive and metastatic angiosarcoma independent of other genetically engineered oncogenes or tumor suppressor loss...
September 15, 2017: Cancer Research
https://www.readbyqxmd.com/read/28906478/complementary-rna-sequencing-based-transcriptomics-and-itraq-proteomics-reveal-the-mechanism-of-the-alleviation-of-quinclorac-stress-by-salicylic-acid-in-oryza-sativa-ssp-japonica
#4
Jian Wang, Faisal Islam, Lan Li, Meijuan Long, Chong Yang, Xiaoli Jin, Basharat Ali, Bizeng Mao, Weijun Zhou
To uncover the alleviation mechanism of quinclorac stress by salicylic acid (SA), leaf samples of Oryza sativa ssp. Japonica under quinclorac stress with and without SA pre-treatment were analyzed for transcriptional and proteomic profiling to determine the differentially expressed genes (DEGs) and proteins (DEPs), respectively. Results showed that quinclorac stress altered the expression of 2207 DEGs (1427 up-regulated, 780 down-regulated) and 147 DEPs (98 down-regulated, 49 up-regulated). These genes and proteins were enriched in glutathione (GSH) metabolism, porphyrin and chlorophyll metabolism, the biosynthesis of secondary metabolites, glyoxylate and dicarboxylate metabolism, and so on...
September 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28903400/hyperglycemia-and-advanced-glycation-end-products-ages-suppress-the-differentiation-of-3t3-l1-preadipocytes
#5
Chia-Chu Chang, Chen-Yu Chen, Geen-Dong Chang, Ting-Huan Chen, Woan-Ling Chen, Hui-Chin Wen, Chih-Yang Huang, Chung-Ho Chang
Aging is characterized by mild hyperglycemia and accumulation of advanced glycation end products (AGEs). Effects of chronic exposure to hyperglycemia or AGEs on the adipogenic differentiation of 3T3-L1 preadipocytes remain unclear. We examined the chronic effect of AGEs and high glucose on the differentiation of 3T3-L1 cells by culturing 3T3-L1 cells in the presence of AGEs or 25 mM glucose for 1 month. Chronic incubation of 3T3-L1 cells with AGEs or high glucose blocked their differentiation into mature adipocytes as evidenced by reduced levels of adipocyte markers such as accumulated oil droplets, GPDH, aP2, adiponectin and of adipogenesis regulators PPARγ and C/EBPα...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28887923/anti-adipogenesis-mechanism-of-pterostilbene-through-the-activation-of-heme-oxygenase-1-in-3t3-l1-cells
#6
Young-Jin Seo, Kui-Jin Kim, Eun-Jeong Koh, Jia Choi, Boo-Yong Lee
BACKGROUND: Pterostilbene is a stilbenoid and major compound and has diverse biological activities, such as antioxidant, anti-cancer, and anti-inflammatory. However, it has not been shown whether pterostilbene affects the mitotic clonal expansion during adipogenesis in 3T3-L1 cells. PURPOSE: In the present study, we aimed to demonstrate the detailed mechanism of pterostilbene on anti-adipogenesis in 3T3-L1 cells. METHODS: Preadipocytes were converted to adipocytes through treatment with MDI (IBMX; 3-isobutyl-1-methylxanthine, DEX; dexamethasone, insulin) in 3T3-L1 cells...
September 15, 2017: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/28887453/hyaluronic-acid-based-extracellular-matrix-regulates-surface-expression-of-glun2b-containing-nmda-receptors
#7
Barbara Schweitzer, Jeet Singh, Anna Fejtova, Laurent Groc, Martin Heine, Renato Frischknecht
Cortical areas of the juvenile rodent brain display a high degree of structural and functional plasticity, which disappears later in development. Coincident with the decline of plasticity 1) the hyaluronic acid-based extracellular matrix (ECM) of the brain, which stabilizes synapses and neuronal circuit is formed and 2) N-methyl-D-aspartate subtype of ionotropic glutamate receptors (NMDARs) implied in synaptic plasticity switch from mainly GluN2B to GluN2A subunit-containing receptors. Here we tested the hypothesis that ECM influences the NMDAR subunit composition in dissociated neuronal cultures...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28884358/effective-enhancement-of-resistance-to-phytophthora-infestans-by-overexpression-of-mir172a-and-b-in-solanum-lycopersicum
#8
Yushi Luan, Jun Cui, Jie Li, Ning Jiang, Ping Liu, Jun Meng
Overexpression of miR172a and b in tomato ( Solanum lycopersicum ) Zaofen No. 2 increased resistance to Phytophthora infestans infection by suppressing of an AP2/ERF transcription factor. The miR172 family has been shown to participate in the growth phase transition, flowering time control, abiotic and biotic stresses by regulating the expression of a small group of AP2/ERF transcription factors. In this study, the precursors of miR172a and b were cloned from tomato, Solanum pimpinellifolium L3708. We used the degradome sequencing to determine the cleavage site of miR172 to a member of the AP2/ERF transcription factor family (Solyc11g072600...
September 7, 2017: Planta
https://www.readbyqxmd.com/read/28874665/endocytic-sorting-motif-interactions-involved-in-nef-mediated-downmodulation-of-cd4-and-cd3
#9
Santiago Manrique, Daniel Sauter, Florian A Horenkamp, Sebastian Lülf, Hangxing Yu, Dominik Hotter, Kanchan Anand, Frank Kirchhoff, Matthias Geyer
Lentiviral Nefs recruit assembly polypeptide complexes and target sorting motifs in cellular receptors to induce their internalization. While Nef-mediated CD4 downmodulation is conserved, the ability to internalize CD3 was lost in HIV-1 and its precursors. Although both functions play key roles in lentiviral replication and pathogenicity, the underlying structural requirements are poorly defined. Here, we determine the structure of SIVmac239 Nef bound to the ExxxLM motif of another Nef molecule at 2.5 Å resolution...
September 5, 2017: Nature Communications
https://www.readbyqxmd.com/read/28869898/3-o-glucosylation-of-quercetin-enhances-inhibitory-effects-on-the-adipocyte-differentiation-and-lipogenesis
#10
Chang Won Lee, Jeong Yeon Seo, Jisun Lee, Ji Won Choi, Sarang Cho, Jae Youn Bae, Jae Kyung Sohng, Sung Oog Kim, Jihoon Kim, Yong Il Park
Glycosylation of natural flavonoids with various sugar moieties can affect their physicochemical and pharmacological properties. In this study, the plant flavonoids quercetin aglycon (Quer) and quercetin 3-O-glucoside (Q3G) were evaluated and compared for their potential anti-obesity effects. The Q3G dose-dependently reduced the TG contents and lipid accumulation in 3T3-L1 adipocyte cells, by 52% and 60% at 20μM, respectively, compared to differentiated control (100%), which were 1.6-fold and 2.4-fold higher reduction than Quer...
September 1, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28859611/transcript-profiling-of-genes-expressed-during-fibre-development-in-diploid-cotton-gossypium-arboreum-l
#11
Atul S Hande, Ishwarappa S Katageri, Mangesh P Jadhav, Sateesh Adiger, Savita Gamanagatti, Kethireddy Venkata Padmalatha, Gurusamy Dhandapani, Mogilicherla Kanakachari, Polumetla Ananda Kumar, Vanga Siva Reddy
BACKGROUND: Cotton fibre is a single cell and it is one of the best platforms for unraveling the genes express during various stages of fibre development. There are reports devoted to comparative transcriptome study on fiber cell initiation and elongation in tetraploid cultivated cotton. However, in the present investigation, comparative transcriptome study was made in diploid cultivated cotton using isogenic fuzzy-lintless (Fl) and normal fuzzy linted (FL) lines belong to Gossypium arboreum, diploid species at two stages, 0 and 10 dpa (days post anthesis), using Affymetrix cotton GeneChip genome array...
August 31, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28859377/dornr%C3%A3-schen-dornr%C3%A3-schen-like-and-puchi-redundantly-control-floral-meristem-identity-and-organ-initiation-in-arabidopsis
#12
J W Chandler, W Werr
The biphasic floral transition in Arabidopsis thaliana involves many redundant intersecting regulatory networks. The related AP2 transcription factors DORNRÖSCHEN (DRN), DORNRÖSCHEN-LIKE (DRNL), and PUCHI individually execute well-characterized functions in diverse developmental contexts, including floral development. Here, we show that their combined loss of function leads to synergistic floral phenotypes, including reduced floral merosity in all whorls, which reflects redundant functions of all three genes in organ initiation rather than outgrowth...
June 15, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28855251/pick1-regulates-ampa-receptor-endocytosis-via-direct-interactions-with-ap2-%C3%AE-appendage-and-dynamin
#13
Maria Fiuza, Christine M Rostosky, Gabrielle T Parkinson, Alexei M Bygrave, Nagaraj Halemani, Marcio Baptista, Ira Milosevic, Jonathan G Hanley
Clathrin-mediated endocytosis (CME) is used to internalize a diverse range of cargo proteins from the cell surface, often in response to specific signals. In neurons, the rapid endocytosis of GluA2-containing AMPA receptors (AMPARs) in response to NMDA receptor (NMDAR) stimulation causes a reduction in synaptic strength and is the central mechanism for long-term depression, which underlies certain forms of learning. The mechanisms that link NMDAR activation to CME of AMPARs remain elusive. PICK1 is a BAR domain protein required for NMDAR-dependent reductions in surface GluA2; however, the molecular mechanisms involved are unclear...
August 30, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28851613/characterization-of-the-visfatin-gene-and-its-expression-pattern-and-effect-on-3t3-l1-adipocyte-differentiation-in-chickens
#14
Zhuanjian Li, Yongcai Wang, Xiaoxiao Tian, Pengfei Shang, Hong Chen, Xiangtao Kang, Yadong Tian, Ruili Han
Visfatin is a newly identified adipocytokine that plays an important role in the determination of fat traits. In this study, we investigated the characterization of visfatin and the relationship between gene expression and chicken development to provide a theoretical basis for studying visfatin functions. The main results are summarized as follows: The 1482-bp full coding sequence of the visfatin gene of silky fowl was obtained and found to encode 493 amino acids. This gene contains 26 phosphorylation sites and a conserved domain of the NAPRTase family but no signal peptide sequence...
October 20, 2017: Gene
https://www.readbyqxmd.com/read/28845529/map-based-cloning-of-the-pear-gene-myb114-identifies-an-interaction-with-other-transcription-factors-to-coordinately-regulate-fruit-anthocyanin-biosynthesis
#15
Gaifang Yao, Meiling Ming, Andrew C Allan, Chao Gu, Leiting Li, Xiao Wu, Runze Wang, Yaojun Chang, Kaijie Qi, Shaoling Zhang, Jun Wu
Red fruits are popular and widely accepted by consumers because of an enhanced appearance and enriched anthocyanins. The molecular mechanism of anthocyanin regulation in red-skinned pears has been studied, and the genes encoding the biosynthetic steps and several transcription factors (TFs) have been characterized. In this study, a candidate R2R3 MYB TF, PyMYB114, was identified by linkage to the quantitative trait loci (QTL) for red skin color on linkage group 5 (LG5) in a population of Chinese pear (Pyrus bretschneideri)...
August 28, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28837410/new-insights-into-artemisinin-regulation
#16
Zongyou Lv, Lei Zhang, Kexuan Tang
Artemisinin is a sesquiterpene lactone coming from the traditional Chinese herb Artemisia annua L. Artemisinin combination therapies (ACTs) are the main recommended treatment of malaria. Transcription factors regulation of artemisinin belong to different families including AP2/ERF, bHLH, MYB and WRKY. Plant hormones jasmonic acid (JA), abscisic acid (ABA), salicylic acid (SA) and gibberellins (GA) have been described as positively affecting artemisinin biosynthesis in A. annua. Transporter and miRNA open up new possibilities for the biosynthesis of high value artemisinin...
August 24, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28830473/survival-outcomes-of-hepatectomy-for-stage-b-hepatocellular-carcinoma-in-the-bclc-classification
#17
Toshiya Kamiyama, Tatsuya Orimo, Kenji Wakayama, Shingo Shimada, Akihisa Nagatsu, Hideki Yokoo, Hirofumi Kamachi, Kenichiro Yamashita, Tsuyoshi Shimamura, Akinobu Taketomi
BACKGROUND: Because hepatectomy is not recommended in patients with stage B hepatocellular carcinoma (HCC) of the Barcelona Clinic Liver Cancer (BCLC) staging, we evaluated the survival outcomes of hepatectomy for stage B in the BCLC system. METHODS: Data were collected from 297 consecutive adult stage B patients who underwent curative hepatectomy for HCC between 1996 and 2014 in Hokkaido University Hospital. Overall survival (OS), disease-free survival (DFS), and risk factors were analyzed using the Kaplan-Meier method...
August 22, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28816006/cd38-deficiency-suppresses-adipogenesis-and-lipogenesis-in-adipose-tissues-through-activating-sirt1-ppar%C3%AE-signaling-pathway
#18
Ling-Fang Wang, Lian-Jie Miao, Xiao-Nv Wang, Cong-Cong Huang, Yi-Song Qian, Xuan Huang, Xiao-Lei Wang, Wan-Zhu Jin, Guang-Ju Ji, Mingui Fu, Ke-Yu Deng, Hong-Bo Xin
It has been recently reported that CD38 was highly expressed in adipose tissues from obese people and CD38-deficient mice were resistant to high-fat diet (HFD)-induced obesity. However, the role of CD38 in the regulation of adipogenesis and lipogenesis is unknown. In this study, to explore the roles of CD38 in adipogenesis and lipogenesis in vivo and in vitro, obesity models were generated with male CD38(-/-) and WT mice fed with HFD. The adipocyte differentiations were induced with MEFs from WT and CD38(-/-) mice, 3T3-L1 and C3H10T1/2 cells in vitro...
August 16, 2017: Journal of Cellular and Molecular Medicine
https://www.readbyqxmd.com/read/28815933/an-%C3%AE-iib-%C3%AE-3-antagonist-prevents-thrombosis-without-causing-fc%C3%AE-riia-mediated-thrombocytopenia
#19
Yu-Ju Kuo, Ying-Ru Chen, Chun-Chieh Hsu, Hui-Chin Peng, Tur-Fu Huang
BACKGROUND: Thrombocytopenia, a common side effect of Arg-Gly-Asp (RGD)-mimetic antiplatelet drugs, is associated with drug-dependent antibodies (DDAbs) that recognize conformation-altered integrin αIIb β3 . OBJECTIVE: To explore the correlation between αIIb β3 binding epitopes and induction of DDAb binding to conformation-altered αIIb β3 , we examined whether two purified disintegrins TMV-2 and TMV-7 with distinct binding motifs that have different effects on induction of αIIb β3 conformational change and platelet aggregation in the presence of AP2, an IgG1 inhibitory monoclonal antibody (mAb) raised against αIIb β3 ...
August 16, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28802120/discovery-of-pentacyclic-triterpene-3%C3%AE-ester-derivatives-as-a-new-class-of-cholesterol-ester-transfer-protein-inhibitors
#20
Dongyin Chen, Xin Huang, Hongwen Zhou, Hanqiong Luo, Pengfei Wang, Yongzhi Chang, Xinyi He, Suiying Ni, Qingqing Shen, Guoshen Cao, Hongbin Sun, Xiaoan Wen, Jun Liu
A series of pentacyclic triterpene 3β-ester derivatives were designed, synthesized and evaluated as a new class of cholesteryl ester transfer protein (CETP) inhibitors for the treatment of dyslipidemia. In vitro screening assay showed that 5 out of 30 compounds displayed moderate inhibiting human CETP activity with IC50s less than 10 μM. Among them, compound 20 (IC50 = 2.3 μM) had the most potent biological activity, and effectively ameliorated plasma lipid levels of human adipose tissue specific CETP transgenic (ap2-CETPTg) mice and guinea pigs...
August 4, 2017: European Journal of Medicinal Chemistry
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