Dendronized‐Polymer Disturbing Cells' Stress Protection by Targeting Metabolism Leads to Tumor Vulnerability

2020 ◽  
Vol 32 (14) ◽  
pp. 1907490 ◽  
Author(s):  
Dayi Pan ◽  
Xiuli Zheng ◽  
Qianfeng Zhang ◽  
Zhiqian Li ◽  
Zhenyu Duan ◽  
...  
Keyword(s):  
Stress Protection ◽  
Dendronized Polymer

White clover sensitivity to UV-B radiation - biochemical relationships and interaction with drought

2003 ◽  
pp. 273-277
Author(s):  
R.W. Hofmann ◽  
B.D. Campbell ◽  
E.E. Swinny ◽  
S.J. Bloor ◽  
K.R. Markham ◽  
...  
Keyword(s):  
New Zealand ◽  
White Clover ◽  
Ultraviolet B ◽  
Summer Drought ◽  
Stress Protection ◽  
Trade Offs ◽  
Population Comparisons ◽  
Potential Benefits ◽  
Quercetin Glycosides ◽  
Balance Trade

During summertime in New Zealand, white clover experiences high levels of ultraviolet-B (UV-B) radiation. This frequently coincides with periods of summer drought. We investigated responses to UV-B and to the combination of UV-B and drought in various white clover populations, including New Zealand cultivars and ecotypes as well as overseas germplasm. The results were obtained under controlled environmental conditions in three independent trials. Overall, white clover growth was reduced by UV-B. The population comparisons indicated that low growth rate and adaptation to other forms of stress may be related to UV-B tolerance under well-watered conditions, but not during extended periods of drought. Flavonoid pigments that are involved in stress protection were strongly increased under UV-B and were further enhanced in the combination of UV-B and drought. The responses among these flavonoids were highly specific, with more pronounced UV-B-induced increases in quercetin glycosides, compared to their closely related kaempferol counterparts. UV-B toler ance of the less productive white clover populations was linked to the accumulation of quercetin compounds. In conclusion, these studies suggest (i) that slow-growing white clover ecotypes adapted to other stresses have higher capacity for biochemical acclimation to UV-B under well-watered conditions and (ii) that these biochemical attributes may also contribute to decreased UV-B sensitivity across white clover populations under drought. The findings alert plant breeders to potential benefits of selecting productive germplasm for high levels of specific flavonoids to balance trade-offs between plant productivity and stress tolerance. Keywords: Drought, flavonoids, genetic variation, HPLC, kaempferol, quercetin, str ess, Trifolium repens L., ultraviolet-B, white clover

Carnitine and carnitine acetyltransferases in the yeast Saccharomyces cerevisiae: a role for carnitine in stress protection

2008 ◽  
Vol 53 (6) ◽  
pp. 347-360 ◽  
Author(s):  
Jaco Franken ◽  
Sven Kroppenstedt ◽  
Jan H. Swiegers ◽  
Florian F. Bauer
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Yeast Saccharomyces Cerevisiae ◽  
Stress Protection

Caveolin-1 promotes radioresistance in rhabdomyosarcoma through increased oxidative stress protection and DNA repair

2021 ◽  
Vol 505 ◽  
pp. 1-12
Author(s):  
Silvia Codenotti ◽  
Francesco Marampon ◽  
Luca Triggiani ◽  
Marco Lorenzo Bonù ◽  
Stefano Maria Magrini ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Dna Repair ◽  
Caveolin 1 ◽  
Stress Protection ◽  
Oxidative Stress Protection

scholarly journals Engineered EVs for Oxidative Stress Protection

2021 ◽  
Vol 14 (8) ◽  
pp. 703
Author(s):  
Anna Maria Tolomeo ◽  
Santina Quarta ◽  
Alessandra Biasiolo ◽  
Mariagrazia Ruvoletto ◽  
Michela Pozzobon ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Extracellular Vesicles ◽  
Transgene Expression ◽  
Hepatoma Cell ◽  
Serine Protease Inhibitor ◽  
Protein Product ◽  
Hepatoma Cell Line ◽  
Cytoprotective Activity ◽  
Stress Protection ◽  
Oxidative Stress Protection

Extracellular vesicles (EVs) are increasingly studied as vectors for drug delivery because they can transfer a variety of molecules across biological barriers. SerpinB3 is a serine protease inhibitor that has shown a protective anti-apoptotic function in a variety of stressful conditions. The aim of this study was to evaluate protection from oxidative stress-induced damage, using extracellular vesicles that overexpress SerpinB3 (EVs-SB3) in order to enhance the effect of extracellular vesicles on cellular homeostasis. EVs-SB3s were obtained from HepG2 cells engineered to overexpress SerpinB3 and they revealed significant proteomic changes, mostly characterized by a reduced expression of other proteins compared with EVs from non-engineered cells. These EV preparations showed a significantly higher protection from H2O2 induced oxidative stress in both the hepatoma cell line and in primary cardiomyocytes, compared to cells treated with naïve EVs or SerpinB3 alone, used at the same concentration. In conclusion, the induction of SerpinB3 transgene expression results in the secretion of EVs enriched with the protein product that exhibits enhanced cytoprotective activity, compared with naïve EVs or the nude SerpinB3 protein.

scholarly journals An HPLC-automated Derivatization for Glutathione and Related Thiols Analysis in Brassica rapa L.

Agronomy ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1157
Author(s):  
Francesco Nacca ◽  
Concetta Cozzolino ◽  
Petronia Carillo ◽  
Pasqualina Woodrow ◽  
Amodio Fuggi ◽  
...  
Keyword(s):  
Brassica Rapa ◽  
High Performance ◽  
Internal Standard ◽  
Plant Tissues ◽  
Cellular Functions ◽  
Sulphur Compounds ◽  
Stress Protection ◽  
Automated Method ◽  
Reduced Forms

The high content of glucosinolates and glutathione makes the Brassicaceae an important healthy food. Thiols and especially glutathione and γ-Glu-Cys-Gly tripeptide are involved in many fundamental cellular functions such as oxidative stress protection. Although several methods for sulphur compounds analysis in biological samples are actually used, the determination of glutathione and other sulphur derivatives in plant tissues is rather problematic due to their extreme susceptibility to oxidation, which can lead to their overestimation. The aim of this work was the improvement and validation of an automated method for determination of reduced and oxidised glutathione, cysteine and γ-glutamylcysteine in plant tissues. The method consists of a fully automated pre-column derivatization of thiols based on monobromobimane reagent, a high-performance liquid chromatography derivatives separation, and a fluorimetric detection and quantification. The method was successfully applied for determination of the oxidized and reduced forms of Cys, γ-GC and GSH content in leaves, petioles, inflorescences and roots of Brassica rapa L. subsp. Sylvestris. At harvest, in freshly cut plants, the average contents of GSH/2GSSG were 840/45, 345/70 and 150/70 nmol g−1 FW for the florets, leaf blades and stems, respectively; those of Cys/2Cys were 80/12, 29/12 and 24/6 nmol g-1 FW; while those of γ-GC/γ-GCCG-γ were 8.0/4.0, and 6.0/3.0, 3.0/2.0 nmol g−1 FW, respectively. Such amounts were lower in low-sulphur-grown plants at harvest. The very low coefficient of variation between repeated tests (maximum 1.6%), the high recovery of internal standard (>96%) and the linear correlation coefficient of the calibration (R2 > 0.99) support the efficiency of this method that allowed analysing about 50 samples/die in a totally automated manner with no operator intervention. Our results show that the reported method integrations can significantly improve thiols detection via HPLC.

Stress protection of the sheep tibia using an oxford MkII external fixator

1991 ◽  
Vol 24 (6) ◽  
pp. 465 ◽  
Author(s):  
S.P. Butler ◽  
D. O'Doherty ◽  
A.E. Goodship
Keyword(s):  
External Fixator ◽  
Stress Protection

scholarly journals Myosin-cross-reactive antigen (MCRA) protein from Bifidobacterium breve is a FAD-dependent fatty acid hydratase which has a function in stress protection

2011 ◽  
Vol 12 (1) ◽  
pp. 9 ◽  
Author(s):  
Eva Rosberg-Cody ◽  
Alena Liavonchanka ◽  
Cornelia Göbel ◽  
R Ross ◽  
Orla O'Sullivan ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Bifidobacterium Breve ◽  
Stress Protection

scholarly journals A Central Role of Abscisic Acid in Drought Stress Protection of Agrobacterium-Induced Tumors on Arabidopsis

2007 ◽  
Vol 145 (3) ◽  
pp. 853-862 ◽  
Author(s):  
Marina Efetova ◽  
Jürgen Zeier ◽  
Markus Riederer ◽  
Chil-Woo Lee ◽  
Nadja Stingl ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Drought Stress ◽  
Stress Protection ◽  
Induced Tumors
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