Organic Syntheses on an Icosahedral Borane Surface: Closomer Structures with Twelvefold Functionality
作者:Tiejun Li、Satish S. Jalisatgi、Michael J. Bayer、Andreas Maderna、Saeed I. Khan、M. Frederick Hawthorne
DOI:10.1021/ja055226m
日期:2005.12.1
corresponding dianionic dodeca-ester closomers. The method using 1,1'-carbonyldiimidazole-activated carboxylic acids may be employed as a general synthetic strategy. The use of elevated reaction temperatures, achievable under pressure, to expedite syntheses is described. An attractive methodology using immobilized scavenger reagents for the expeditious purification of the closomer esters was employed. The developed
A Clickable and Photocleavable Lipid Analogue for Cell Membrane Delivery and Release
作者:Shahrina Alam、Daiane S. Alves、Stuart A. Whitehead、Andrew M. Bayer、Christopher D. McNitt、Vladimir V. Popik、Francisco N. Barrera、Michael D. Best
DOI:10.1021/acs.bioconjchem.5b00044
日期:2015.6.17
For drug delivery purposes, the ability to conveniently attach a targeting moiety that will deliver drugs to cells and then enable controlled release of the active molecule after localization is desirable. Toward this end, we designed and synthesized clickable and photocleavable lipid analogue 1 to maximize the efficiency of bioconjugation and triggered release. This compound contains a dibenzocyclooctyne group for bioorthogonal derivatization linked via a photocleavable 2-nitrobenzyl moiety at the headgroup of a synthetic lipid backbone for targeting to cell membranes. To assess delivery and release using this system, we report fluorescence-based assays for liposomal modification and photocleavage in solution as well as through surface immobilization to demonstrate successful liposome functionalization and photoinduced release. In addition, fluorophore delivery to and release from live cells was confirmed and characterized using fluorescence microscopy and flow cytometry analysis in which 1 was delivered to cells, derivatized, and photocleaved. Finally, drug delivery studies were performed using an azide-tagged analogue of camptothecin, a potent anticancer drug that is challenging to deliver due to poor solubility. In this case, the ester attachment of the azide tag acted as a caging group for release by intracellular esterases rather than through photocleavage. This resulted in a dose-dependent response in the presence of liposomes containing delivery agent 1, confirming the ability of this compound to stimulate delivery to the cytoplasm of cells.
Photoproximity Profiling of Protein–Protein Interactions in Cells
作者:David C. McCutcheon、Gihoon Lee、Anthony Carlos、Jeffrey E. Montgomery、Raymond E. Moellering
DOI:10.1021/jacs.9b06528
日期:2020.1.8
We report a novel photoproximity protein interaction (PhotoPPI) profiling method to map protein-protein interactions in vitro and in live cells. This approach utilizes a bioorthogonal, multifunctional chemical probe that can be targeted to a geneticallyencoded protein of interest (POI) through a modular SNAP-Tag/benzylguanine covalent interaction. A first generation photoproximity probe, PP1, responds
[EN] PHOTOPROXIMITY PROFILING OF PROTEIN-PROTEIN INTERACTIONS IN CELLS<br/>[FR] PROFILAGE DE PHOTOPROXIMITÉ D'INTERACTIONS PROTÉINE-PROTÉINE DANS DES CELLULES
申请人:UNIV CHICAGO
公开号:WO2021055960A1
公开(公告)日:2021-03-25
Photoactive probes and probe systems for detecting biological interactions are described. The photoactive probes include probes that combine both photocleavable and photoreactive moieties. The photoactive probe systems can include a first probe comprising a photocatalytic group and a second probe comprising a group that can act as a substrate for the reaction catalyzed by the photocatalytic group. The probes and probe systems can also include groups that can specifically bind to a binding partner on a biological entity of interest and a detectable group or a precursor thereof. The probes and probe systems can detect spatiotemporal interactions of proteins or cells. In some embodiments, the interactions can be detected in live cells. Also described are methods of detecting the biological interactions.
The novel benzamide derivative represented by formula (1) and the novel anilide derivative represented by formula (13) of this invention has differentiation-inducing effect, and are, therefore, useful a therapeutic or improving agent for malignant tumors, autoimmune diseases, dermatologic diseases and parasitism. In particular, they are highly effective as an anticancer drug, specifically to a hematologic malignancy and a solid carcinoma.