Dataset Information

Li2PtF6 revisited.

ABSTRACT: In comparison with previous stucture determinations of Li2PtF6, dilithium hexa-fluorido-platinate(IV) [Graudejus et al. (2000 ?). Inorg. Chem. 39, 2794-2800; Henkel & Hoppe (1968 ?). Z. Anorg. Allg. Chem. 359, 160-177], the current study revealed the Li atom to be refined with anisotropic displacement parameters, thus allowing for a higher overall precision of the model. Li2PtF6 adopts the trirutile structure type with site symmetries of 2.mm, m.mm, ..m and m.2m for the Li, Pt and the two F sites. The Pt-F distances in the slightly distorted PtF6 octa-hedron are essentially similar with 1.936?(4) and 1.942?(6)?Å, and the equatorial F-Pt-F angles range from 82.2?(2) to 97.8?(2)°. The Li-F distances in the somewhat more distorted LiF6 octa-hedron are 1.997?(15) and 2.062?(15)?Å, with equatorial F-Li-F angles ranging from 76.3?(7) to 99.71?(17)°.

SUBMITTER: Kraus F

PROVIDER: S-EPMC4158554 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature

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Li2PtF6 revisited.

Kraus Florian F

Acta crystallographica. Section E, Structure reports online 20140711 Pt 8

In comparison with previous stucture determinations of Li2PtF6, dilithium hexa-fluorido-platinate(IV) [Graudejus et al. (2000 ▶). Inorg. Chem. 39, 2794-2800; Henkel & Hoppe (1968 ▶). Z. Anorg. Allg. Chem. 359, 160-177], the current study revealed the Li atom to be refined with anisotropic displacement parameters, thus allowing for a higher overall precision of the model. Li2PtF6 adopts the trirutile structure type with site symmetries of 2.mm, m.mm, ..m and m.2m for the Li, Pt and the two F site ...[more]

PMID: 25249872

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Project description:The possibility of generating neural cells from human bone marrow-derived mesenchymal stem cells by simple in vitro treatments is alluring both conceptually and practically. However, whether phenotypic modulations observed after chemical manipulation of such stem cells truly represent a genuine trans-lineage differentiation remains to be established. We have re-evaluated the effects of a frequently reported biochemical approach, based on treatment with butylated hydroxyanisole and dimethylsulphoxide, to bring about such phenotypic conversion by monitoring the morphological changes induced by the treatment in real time, by analysing the expression of phenotype-specific protein markers and by assessing the modulation of the cells’ transcriptome. Video time-lapse microscopy showed that conversion of mesenchymal stem cells to a neuron-like morphology could be reproduced in normal primary fibroblasts as well as mimicked by addition of drugs eliciting cytoskeletal collapse and disruption of focal adhesion contacts. Analysis of markers revealed that mesenchymal stem cells constitutively expressed multi-lineage traits, including several pertaining to the neural one. However, the applied “neural induction” protocol neither significantly modulated the expression of such markers, nor induced de novo translation of other neural specific proteins. Similarly, global expression profiling of over 21,000 genes demonstrated that gene transcription was poorly affected. Most strikingly, we found that the set of genes whose expression was altered by the inductive treatment did not match the set of genes found to be differentially expressed when comparing untreated mesenchymal stem cells and immature neural tissues. Conversely, by comparing these gene expression profiles with that obtained from comparisons between the same cells and an unrelated non-neural organ, such as liver, we found that the adopted “neural induction” protocol was no more effective in redirecting human mesenchymal stem cells toward a neural phenotype than toward an endodermal hepatic pathway. Keywords: Differentiation analysis

Dataset Information

Li2PtF6 revisited.

Publications

Li2PtF6 revisited.

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