Employing antibody fragments instead of full-length antibodies in antibody-drug conjugates can facilitate accumulation of the therapeutics in the tumor and reduce their side effects. Scientists from the Laboratory of molecular immunology together with colleagues from the Laboratory of cell interactions, the Laboratory of molecular diagnostics at IBCh RAS, and other Russian Institutes have for the first time developed GD2-specific antibody fragment-drug conjugates. Minibody and scFv fragment conjugates with the tubulin-inhibiting drugs MMAE and MMAF manifested strong cytotoxic and cytostatic effects in GD2-positive neuroblastoma and melanoma cell lines.

A group of scientists from the Laboratory of Molecular Design and Synthesis, the Protein Growth and Differentiation Factor Expression Group of the Institute of Bioorganic Chemistry, Russian Academy of Sciences, the Institute of Poliomyelitis and other institutes synthesized a series of compounds based on 5-(perylene-3-ylethynyl)uracil and studied their antiviral properties and mechanism of action. Previous studies of this class of compounds have suggested controversial types of mechanisms of action. Nonetheless providing comparable high activity. The present study showed that, upon irradiation with light, amphiphilic compounds accumulated in cell and viral membranes inhibit the entry of enveloped viruses into the cell.

Curtobacterium is a genus of Gram-positive bacteria within the order Actinomycetales. Some Curtobacterium species are harmful pathogens of agricultural crops such as soybean, dry beans, peas, sugar beet and beetroot, which occur throughout the world. About 200 publicly available genomes of Curtobacterium species, including environmental metagenomic sequences, were inspected for the presence of sequences of possible prophage origin using bioinformatic methods.

One of the challenging tasks of Duplodnaviria taxonomy is the classification of high-ranked taxa, including families and orders. In this study, the team of scientists from the Laboratory of molecular bioengineering IBCh RAS in collaboration with the colleagues from the Limnological Institute analized the evolutionary relationships of conserved viral proteins, representing different viruses, including all classified Duplodnaviria families, using AlphaFold modelling.

The members of the redox biology group and the Laboratory of molecular technologies from the Department of Metabolism and Redox Biology, IBCH RAS, in the collaboration with colleagues from Federal Center of Brain Research and Neurotechnologies, Federal Medical Biological Agency, and Pirogov Russian National Research Medical University, using a well-established model of long-term potentiation, revealed that neuronal oxidative stress affects synaptic plasticity.

A group of scientists from the Laboratory of Molecular Immunology of the IBCh RAS, GPI RAS and a several other scientific Institutes investigated biotransformation of magnetic nanoparticles in the body and the effect of this process both on the metabolism of the iron and on reducing the contrast properties of nanoparticles during imaging. For a long time, it remained unclear what happens in the long term with nanoparticle contrasts for MRI after their distribution in tissues. In addition, magnetic particle biodegradation is accompanied by abundant release of iron ions, which can cause toxic effects. A recent study published in the high-ranking Journal of Nanobiotechnology clarified these issues.

Nicotinic acetylcholine receptor of α7 type (α7-nAChR) presented in the nervous and immune systems and epithelium is a promising therapeutic target for cognitive disfunctions and cancer treatment. Weak toxin from venom of cobra Naja kaouthia (WTX) is a non-conventional three-finger α-neurotoxin from Naja kaouthia venom, targeting α7-nAChR with weak affinity. There were no data on interaction mode of non-conventional neurotoxins with α7-nAChR.

Ankylosing spondylitis is an autoimmune rheumatological disease, where aberrant immune response against self-antigens is considered as a main trigger of the pathology. Up to date identification of antigen epitopes recognized by specific T cell receptors (TCRs), especially self-epitopes, remains tricky challenge and there is the very limited list of TCRs with characterized antigen specificity.

In recent years, the enrichment of fruits and berries with biologically active substances, in particular, antioxidants has received increased development in breeding (the creation of functional food). Researchers from the Forest Biotechnology Group of the FIBCh, together with colleagues from other institutes, studied the content of total phenols, flavonoids and anthocyanins, their relationship with the antioxidant activity of berries and leaves of various raspberry cultivars of Russian and foreign origin, as well as new breeding lines.

The real-time monitoring of the intracellular pH in live cells with high precision represents an important methodological challenge. Although genetically encoded fluorescent indicators can be considered as a probe of choice for such measurements, they are hindered mostly by the inability to determine an absolute pH value and/or a narrow dynamic range of the signal, making them inefficient for recording the small pH changes that typically occur within cellular organelles.