Results 21 to 30 of about 1,209,458 (341)

Species-specific morphological and physiological characteristics and progressive nitrogen limitation under elevated CO2 concentration

open access: yesiForest - Biogeosciences and Forestry, 2020
Elevated atmospheric CO2 (eCO2) concentration initially enhances photosynthesis, growth and ecosystem productivity, but the excessive use of nitrogen due to the increased productivity causes uncertainty in long-term ecosystem responses. We exposed Korean
Song WK   +8 more
doaj   +1 more source

Study on microRNA-9-5p reducing sensitivity of breast cancer cells to doxorubicin through targeting HIC1 [PDF]

open access: yesWaike lilun yu shijian, 2020
Objective To study the effect of microRNA-9-5p (miR-9-5p) which regulate hypermethylated in cancer 1 (HIC1) in reducing sensitivity of breast cancer MDA-MB-231 cells to doxorubicin (DOX) and the mechanisms.
GAO Hang, ZHAO Feng, WU Yan, PEI Wenjiang, ZHONG Ming, GU Yan, GUO Shanyu, DAI Qiancheng, ZHANG Wei
doaj   +1 more source

5-hydroxytryptamine (5-HT) cellular sequestration during chronic exposure delays 5-HT3 receptor resensitization due to Its subsequent release [PDF]

open access: yes, 2014
The serotonergic synapse is dynamically regulated by serotonin (5-hydroxytryptamine (5-HT)) with elevated levels leading to the down-regulation of the serotonin transporter and a variety of 5-HT receptors, including the 5-HT type-3 (5-HT(3)) receptors ...
Aapro   +54 more
core   +2 more sources

The physiological response of Populus tremula x alba leaves to the down-regulation of PIP1 aquaporin gene expression under no water stress. [PDF]

open access: yes, 2013
In order to study the role of PIP1 aquaporins in leaf water and CO2 transport, several lines of PIP1-deficient transgenic Populus tremula x alba were generated using a reverse genetic approach. These transgenic lines displayed no visible developmental or
Secchi, Francesca, Zwieniecki, Maciej A
core   +3 more sources

N-myc Down-Regulates Activin A

open access: yesBiochemical and Biophysical Research Communications, 2000
N-myc oncogene amplification is frequent in human neuroblastoma and predicts poor prognosis, but the molecular consequences have remained obscure. We report here that enhanced N-myc expression correlates with low or undetectable expression of activin A, but not other closely related members of the transforming growth factor-beta superfamily.
Breit, Stephen   +3 more
openaire   +5 more sources

ESTs analysis in maize developing kernels exposed to single and combined water and heat stresses Análise de ESTs de espigas de milho em desenvolvimento expostas a estresse simples e combinado de água e calor

open access: yesScientia Agricola, 2011
Molecular and metabolic response of plants to a combination of two abiotic stresses is unique and cannot be directly extrapolated from the response of plants to each of the stresses individually.
Violeta Andjelković   +1 more
doaj   +1 more source

HIV-1 subtype C Nef-mediated SERINC5 down-regulation significantly contributes to overall Nef activity

open access: yesRetrovirology, 2023
Background Nef performs multiple cellular activities that enhance HIV-1 pathogenesis. The role of Nef-mediated down-regulation of the host restriction factor SERINC5 in HIV-1 pathogenesis is not well-defined.
Delon Naicker   +9 more
doaj   +1 more source

Loss of miR-107, miR-181c and miR-29a-3p promote activation of Notch2 signaling in pediatric high-grade gliomas (pHGGs) [PDF]

open access: yes, 2017
The mechanisms by which microRNAs control pediatric high-grade gliomas (pHGGs) have yet to be fully elucidated. Our studies of patient-derived pHGG tissues and of the pHGG cell line KNS42 revealed down-regulation in these tumors of three microRNAs ...
Abballe, Luana   +19 more
core   +2 more sources

A novel treatment approach for retinoblastoma by targeting epithelial growth factor receptor expression with a shRNA lentiviral system [PDF]

open access: yesIranian Journal of Basic Medical Sciences, 2017
Objective(s): Non-invasive treatment options for retinoblastoma (RB), the most common malignant eye tumor among children, are lacking. Epithelial growth factor receptor (EGFR) accelerates cell proliferation, survival, and invasion of many tumors ...
Yong Chai   +6 more
doaj   +1 more source

Tre1 GPCR initiates germ cell transepithelial migration by regulating Drosophila melanogaster E-cadherin [PDF]

open access: yes, 2008
Despite significant progress in identifying the guidance pathways that control cell migration, how a cell starts to move within an intact organism, acquires motility, and loses contact with its neighbors is poorly understood.
Barbosa, Vitor   +5 more
core   +3 more sources

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