Press-room / Digest
Pulsed laser reshaping and fragmentation of upconversion nanoparticles – from hexagonal prisms to 1D nanorods through “Medusa”-like structures
Researchers from the Federal Research Center "Crystallography and Photonics" and the Institute of Bioorganic Chemistry RAS, together with colleagues from Austria, Germany and France, have developed a technology for 1D-nanostructure fabrication. One-dimensional upconversion nanocrystals (UCNPs) with unique optical properties and morphology have been prepared by the laser-induced recrystallization of nanostate. Exposure to picosecond laser irradiation of UCNPs with a core/shell structure (β-Na1.5Y1.5F6:Yb3+, Tm3+/β-Na1.5Y1.5F6) led to a controlled dynamic nanotransformation of luminescent 3D-structure into 1D with inherent optical properties through the formation of particles with unusual “medusa”-like architecture. The proposed technology based on picosecond laser treatment enables UCNP surface hydrophilization and performs the transformation from "nano" to "nano", which ensures the preparation of nanoagents for biovisualization and therapy. The research was published in the journal Nano Research.
From cytoskeleton to pluripotency: a new mechanism for regulating stem status of the embryonic cells
Researchers from the Laboratory of Molecular Bases of Embryogenesis (Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS), in technical cooperation with colleagues from the Department of Metabolism and Redox Biology (Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry RAS), the Laboratory of Genomics and Epigenomics of Vertebrates in the Federal Center "Fundamentals of Biotechnology" RAS, as well as with colleagues from the Cell Motility Group of the Institute of Protein Research RAS, discovered a previously unknown mechanism of the regulation of the activity of genes that determine the pluripotent status of the embryonic stem cells. The article was published in Cell Reports. Learn more
Dual Targeting of Cancer Cells with DARPin-Based Toxins for Overcoming Tumor Escape
Researchers of the Laboratory of Molecular Immunology, IBCh RAS, in collaboration with Russian colleagues have shown that the strategy of targeting of anticancer toxins to two different surface antigens on the surface of a cancer cell is effective in the treatment of not only primary solid tumors, but also distant metastases. The proposed approach can serve as a potential therapeutic strategy that surpasses mono-specific targeting strategies in the anti-cancer efficacy. Results of the research are published in Cancers. Learn more
Liquid drop of DNA libraries reveals total genome information
Unlike the tightly controlled replication of DNA in living cells, PCR amplification, a “workhorse” of molecular biology, balances between simplicity and accuracy. Conventional “bulk” PCR often yields inefficient and nonuniform amplification of complex templates in DNA libraries, introducing unwanted biases. Researchers from the Laboratory of biocatalysis, Laboratory of proteolytic enzyme chemistry, Laboratory of bioinformatics approaches in combinatorial chemistry and biology, Laboratory of hormonal regulation proteins IBCh RAS together with their Russian and foreign colleagues showed that amplification of single DNA molecules encapsulated in a myriad of emulsion droplets (emulsion PCR, ePCR) allows the mitigation of this problem. The results of this study are published in PNAS. Learn more
Discovery of the novel protein encoded in mammalian mitochondrial DNA polymerase gene POLG
Researchers from Laboratory of bioinformatics approaches in combinatorial chemistry and biology and Laboratory of high-performance screening of biological objects together with colleagues from Moscow State University and University College Cork (Ireland) discovered novel protein POLGARF, which is encoded in alternative reading frame of mitochondrial DNA polymerase POLG mRNA. The results of this study are published in PNAS. Learn more