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241.
Anaya-Ramos Laura Díaz-Ruíz Araceli Ríos Camilo Mendez-Armenta Marisela Montes Sergio Aguirre-Vidal Yoshajandith García-Jiménez Sara Baron-Flores Veronica Monroy-Noyola Antonio 《Biometals》2021,34(6):1295-1311
BioMetals - Thallium (TI) is one of the most toxic heavy metals. Human exposure to Tl occurs through contaminated drinking water and from there to food, a threat to health. Recently, environmental... 相似文献
242.
Romina F. Vázquez Erasmo Ovalle-García Armando Antillón Iván Ortega-Blake Laura S. Bakás Carlos Muñoz-Garay Sabina M. Maté 《生物化学与生物物理学报:生物膜》2021,1863(1):183467
Sphingolipids-enriched rafts domains are proposed to occur in plasma membranes and to mediate important cellular functions. Notwithstanding, the asymmetric transbilayer distribution of phospholipids that exists in the membrane confers the two leaflets different potentials to form lateral domains as next to no sphingolipids are present in the inner leaflet. How the physical properties of one leaflet can influence the properties of the other and its importance on signal transduction across the membrane are questions still unresolved. In this work, we combined AFM imaging and Force spectroscopy measurements to assess domain formation and to study the nanomechanical properties of asymmetric supported lipid bilayers (SLBs) mimicking membrane rafts. Asymmetric SLBs were formed by incorporating N-palmitoyl-sphingomyelin (16:0SM) into the outer leaflet of preformed 1,2-Dioleoyl-sn-glycero-3-phosphocholine (DOPC)/Cholesterol SLBs through methyl-β-cyclodextrin–mediated lipid exchange. Lipid domains were detected after incorporation of 16:0SM though their phase state varied from gel to liquid ordered (Lo) phase if the procedure was performed at 24 or 37 °C, respectively. When comparing symmetric and asymmetric Lo domains, differences in size and morphology were observed, with asymmetric domains being smaller and more interconnected. Both types of Lo domains showed similar mechanical stability in terms of rupture forces and Young's moduli. Notably, force curves in asymmetric domains presented two rupture events that could be attributed to the sequential rupture of a liquid disordered (Ld) and a Lo phase. Interleaflet coupling in asymmetric Lo domains could also be inferred from those measurements. The experimental approach outlined here would significantly enhance the applicability of membrane models. 相似文献
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Yao Hu Adrienne M. Stilp Caitlin P. McHugh Shuquan Rao Deepti Jain Xiuwen Zheng John Lane Sébastian Méric de Bellefon Laura M. Raffield Ming-Huei Chen Lisa R. Yanek Marsha Wheeler Yao Yao Chunyan Ren Jai Broome Jee-Young Moon Paul S. de Vries Brian D. Hobbs Alexander P. Reiner 《American journal of human genetics》2021,108(5):874-893
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