Rediscovery of mononuclear phagocyte system blockade for nanoparticle drug delivery.

Rapid uptake of nanoparticles by mononuclear phagocyte system (MPS) significantly hampers their therapeutic efficacy. Temporal MPS blockade is one of the few ways to overcome this barrier - the approach rediscovered many times under different names but never extensively used in clinic. Using meta-analysis of the published data we prove the efficacy of this technique for enhancing particle circulation in blood and their delivery to tumours, describe a century of its evolution and potential combined mechanism behind it.

[To the origins of surgery for acoustic neuromas].

Acoustic neuroma is one of the most common tumors of the posterior cranial fossa. Its removal is always a challenge for the neurosurgeon and the patient. The history of surgery for acoustic neuromas is inextricably linked with the history of neurosurgery in general.

Modulation of EGFR Activity by Molecularly Imprinted Polymer Nanoparticles Targeting Intracellular Epitopes.

In recent years, molecularly imprinted polymer nanoparticles (nanoMIPs) have proven to be an attractive alternative to antibodies in diagnostic and therapeutic applications. However, several key questions remain: how suitable are intracellular epitopes as targets for nanoMIP binding? And to what extent can protein function be modulated via targeting specific epitopes? To investigate this, three extracellular and three intracellular epitopes of epidermal growth factor receptor (EGFR) were used as templates for the synthesis of nanoMIPs which were then used to treat cancer cells with different expression levels of EGFR. It was observed that nanoMIPs imprinted with epitopes from the intracellular kinase domain and the extracellular ligand binding domain of EGFR caused cells to form large foci of EGFR sequestered away from the cell surface, caused a reduction in autophosphorylation, and demonstrated effects on cell viability.

New Allosteric Modulators of AMPA Receptors: Synthesis and Study of Their Functional Activity by Radioligand-Receptor Binding Analysis.

The synthetic approaches to three new AMPA receptor modulators-derivatives of 1,11-dimethyl-3,6,9-triazatricyclo[7.3.1.

Early results of intraoperative neurophysiological monitoring in surgical treatment of hemifacial spasm.

Background: Neurophysiological monitoring in surgery for hemifacial spasm has been used since the 1990s, when Moller et al. demonstrated the effectiveness of intraoperative assessment of lateral spread response (LSR) regarding postoperative outcomes. Currently, there are conflicting data on effectiveness and feasibility of this technique.

Role of the Gene Expression in the Clearance of Toxic Vitamin A Derivatives in Human Hair Follicle Stem Cells and Keratinocytes.

The gene encodes an ATP-binding cassette transporter that is expressed specifically in the disc of photoreceptor outer segments. Mutations in the gene are the main cause of retinal degenerations known as "-retinopathies." Recent research has revealed that is expressed in other cells as well, such as hair follicles and keratinocytes, although no information on its significance has been evidenced so far.

Synthetic corticotropins and the GABA-receptor system: Direct and delayed effects.

The central effectors of the stress system are greatly interconnected and include, among others, a large group of peptides derived from proopiomelanocortin. In addition to natural corticotropins, a number of artificial molecules that contain some ACTH fragments in their structure are also referred to members of this family. Some of them possess a wide range of biological activity.

Flash drug release from nanoparticles accumulated in the targeted blood vessels facilitates the tumour treatment.

Tumour microenvironment hinders nanoparticle transport deep into the tissue precluding thorough treatment of solid tumours and metastatic nodes. We introduce an anticancer drug delivery concept termed FlaRE (Flash Release in Endothelium), which represents alternative to the existing approaches based on enhanced permeability and retention effect. This approach relies on enhanced drug-loaded nanocarrier accumulation in vessels of the target tumour or metastasised organ, followed by a rapid release of encapsulated drug within tens of minutes.

Isolation and Characterization of 1-Hydroxy-2,6,6-trimethyl-4-oxo-2-cyclohexene-1-acetic Acid, a Metabolite in Bacterial Transformation of Abscisic Acid.

We report the discovery of a new abscisic acid (ABA) metabolite, found in the course of a mass spectrometric study of ABA metabolism by the rhizosphere bacterium sp. P1Y. Analogue of (+)-ABA, enriched in tritium in the cyclohexene moiety, was fed in bacterial cells, and extracts containing radioactive metabolites were purified and analyzed to determine their structure.

THE FEATURES OF THE NORMAL ULTRASTRUCTURE OF THE RAT DUODENUM AND UNDER THE COMBINED EFFECT OF THE FOOD ADDITIVES COMPLEX.

Objective: The aim: Investigation of ultrastructural changes in the elements of rats' duodenal mucosa in norm and exposed to a complex of food additives (monosodium glutamate, sodium nitrite and Ponceau 4R).

Patients And Methods: Materials and methods: 70 rats of the experimental groups was administered 0.6 mg/kg of sodium nitrite, monosodium glutamate at a dose of 20 mg/kg, Ponceau 4R at a dose of 5 mg/kg in 0.

Polymer-coated BiOCl nanosheets for safe and regioselective gastrointestinal X-ray imaging.

Bismuth-based compounds are considered to be the best candidates for computed tomography (CT) imaging of gastrointestinal (GI) tract due to high X-ray absorption. Here, we report the introduction of polymer-coated bismuth oxychloride (BiOCl) nanosheets for highly efficient CT imaging in healthy mice and animal with colitis. We demonstrate simple, low cost and fast aqueous synthesis protocol which provides gram-quantity yield of chemically stable BiOCl nanosheets.

[Spinal CSF-venous fistula: case report and literature review].

Unlabelled: Syndrome of spontaneous intracranial hypotension is increasingly described in the literature as a multifactorial disease with impairment of the quality of life and risk of mortality. CSF-venous fistula as a cause of intracranial hypotension syndrome is extremely rare and requires complex diagnosis and timely surgical treatment.

Objective: We present a 55-year-old patient with acute spontaneous intracranial hypotension and spinal CSF-venous fistula.

Phage-mimicking nanoagents for rapid depolymerase specificity screening against multidrug resistant bacteria.

With the rise of drug resistance, bacteriophages and bacteriophage-derived proteins may become an efficient successor to traditional antibiotics. While the enormous natural diversity of the phages allows matching virtually any bacteria, identification of the potentially life-saving phage is currently a tedious and time-consuming challenge that often cannot be performed within a reasonable time. Here we show a rapid 1-min bacteriophage screening assay based on specially constructed phage-mimicking nanoagents and surface plasmon resonance effect.

Nano-molecularly imprinted polymers (nanoMIPs) as a novel approach to targeted drug delivery in nanomedicine.

Molecularly imprinted polymers - MIPs - denote synthetic polymeric structures that selectively recognize the molecule of interest against which MIPs are templated. A number of works have demonstrated that MIPs can exceed the affinity and selectivity of natural antibodies, yet operating by the same principle of "lock and key". In contrast to antibodies, which have certain limitations related to the minimal size of the antigen, nanoMIPs can be fabricated against almost any target molecule irrespective of its size and low immunogenicity.

[Higher efficacy of botulinum toxin therapy for hemifacial spasm recurrence after vascular decompression. Case report and literature review].

Hemifacial spasm (HFS) is an involuntary synchronous tonic and/or clonic contraction of mimic muscles following ipsilateral facial nerve dysfunction. The last one is a result of neurovascular conflict between the facial nerve and vessel. Currently, vascular decompression is a pathogenetic treatment modality for primary HFS.

[Rosai-Dorfman intracranial histiocytosis: case report and literature review].

Histiocytosis is a group of idiopathic diseases accompanied by metabolic disorders and accumulation of metabolic products in histiocytes. Isolated Rosai-Dorfman histiocytosis of central nervous system is observed in less than 5% of cases. The authors report treatment and follow-up of a patient with intracranial Rosai-Dorfman disease.

Viral Membrane Fusion Proteins and RNA Sorting Mechanisms for the Molecular Delivery by Exosomes.

The advancement of precision medicine critically depends on the robustness and specificity of the carriers used for the targeted delivery of effector molecules in the human body. Numerous nanocarriers have been explored in vivo, to ensure the precise delivery of molecular cargos via tissue-specific targeting, including the endocrine part of the pancreas, thyroid, and adrenal glands. However, even after reaching the target organ, the cargo-carrying vehicle needs to enter the cell and then escape lysosomal destruction.

MONOSODIUM GLUTAMATE (E621) AND ITS EFFECT ON THE GASTROINTESTINAL ORGANS (REVIEW).

The study of the mechanisms of the effect of various food additives on the human and animal organism is one of the most pressing problems today. The work of physicians, toxicologists, physiologists is aimed at studying the mechanisms of the toxic effect of food additives, as well as studying compensatory-adaptive reactions in response to their ingestion. Monosodium glutamate (E621) is widely used in marketing as a flavor enhancer and is added to many processed foods.

[Endoscopic fenestration of arachnoid cyst of posterior cranial fossa through third ventriculostomy].

Arachnoid cysts (AC) are spaces with cerebrospinal fluid covered with arachnoid membrane. Most cysts are supratentorial and only 10-12% of ACs are found in posterior cranial fossa. This disease is usually diagnosed in childhood.

REMODELING OF THE RAT DUODENAL WALL UNDER THE EFFECT OF COMPLEX FOOD ADDITIVES OF MONOSODIUM GLUTAMATE, SODIUM NITRITE AND PONCEAU 4R.

The purpose of the study was to establish the dynamics of changes in morphometric parameters of the structural components of the rats' duodenal wall with long-term use of a complex of food additives: sodium nitrite, sodium glutamate and Ponceau 4R. The work was performed on 84 adult nonlinear male rats, which were given to drink 10% sodium nitrite solution, sodium glutamate was administered at a dose of 20 mg/kg in 0.5 ml of distilled water, Ponceau 4R - at a dose of 5 mg/kg in 0.

Assessment of the Cytotoxicity of Peptide Modifications of Doxorubicin on Tetrahymena pyriformis.

The cytotoxicity of doxorubicin (Dox) and its peptide modifications Z-Gly-Pro-Dox and Boc-Gly-Pro-Dox were studied. Tetrahymena pyriformis was used as a test system, which made it possible, due to the short life cycle and high reproduction rate of ciliates, to trace their response to the effects of toxicants over several generations. It was found that peptide modification of the Dox molecule markedly reduces its cytotoxic and cytostatic effect.

Structural reorganization of the rats' submandibular glands acini after the influence of 1% methacrylate.

Objective: Introduction: Polymeric substances, which are used in medicine, can lead to the development of pathological conditions. Therefore, in toxicological evaluation of polymeric materials for medical purposes the primary task is the creation of the appropriate adequate methods of study. The aim: To studytheacinioftherats'submandibularsalivaryglandsin normalcondition andafter exposureof 1% methacrylate.

[Value of computer tomographic characteristics of the ventricles of the brain and cerebral hemocirculation in forensic medical examination of mild traumatic brain injury].

Aim of this study is to determine the changes in the parameters of the ventricles of the brain and cerebral hemodynamics to improve the diagnosis of mild traumatic brain injury. A decrease in the parameters of the lateral ventricles in combination with diffuse cerebral hypoperfusion was found. Focal disorders of cerebral circulation in the frontal and temporal lobes were registered in patients with brain injury.

Dynamic light scattering biosensing based on analyte-induced inhibition of nanoparticle aggregation.

A new approach to direct quantitative detection of small molecules (haptens) by dynamic light scattering biosensing is presented. The proposed technique implements a homogeneous competitive immunoassay and is based on optical detection of specific inhibition of nanoparticle aggregation induced by the analyte in a sample. The technique performance was tested both in buffer and milk for detection of chloramphenicol - antibiotic relevant to food safety diagnostics.