[Extracellular vesicles for diagnosis and therapy of gliomas: problems and opportunities]. / Vnekletochnye vezikuly v diagnostike i terapii gliom: problemy i perspektivy.

Glioblastoma is a primary brain tumor and one of the most aggressive malignant neoplasms. The prognosis remains poor with a short survival period after diagnosis even in the case of timely detection and early treatment with the use of advanced chemotherapy, radiation therapy and surgical treatment. In this regard, the research of the main pathogenetic links in the glioblastoma development continues. The current focus is on studying the molecular characteristics of tumours, including the analysis of extracellular vesicles, which play an essential role in intercellular communication processes. In this review, in order to provide up-to-date information on the role of extracellular vesicles in the diagnosis and therapy of gliomas, the analysis of the achieved results of Russian and foreign research related to this area has been carried out. The main goal of this review is to describe the features of extracellular vesicles as the containers and glioma marker transporters, as well as nucleic acids used in diagnosis and therapy.

[Vertical nystagmus]. / Vertikal'nyi nistagm.

The review article provides a definition and classification of different nystagmus types, a comparative description of the central and peripheral vestibular nystagmus. The pathogenetic patterns of up-beating and down-beating nystagmus are accurately described. The features of nystagmus formation in various diseases are discussed, such as Wernicke encephalopathy, Arnold-Chiari anomaly, spinocerebellar ataxia and vestibular migraine. The authors provide their own data on oculomotor disorders in 100 patients with vestibular migraine and migraine with a brain stem aura. This article considers approaches to treatment: surgical and conservative. In conclusion, was noted the possibility of differentiating the central and peripheral vestibular nystagmus by means of clinical study. As well, the differences between vertical nystagmus associated with organic lesions of the brain stem or cerebellum and transient nystagmus with vestibular migraine are highlighted. The authors note the need for in-depth studies of nystagmus in vestibular migraine patients and methods of dealing with it.

[Uvulopalatoplasty with a severe form of obstructive sleep apnea: long-term results]. / Uvulopalatoplastika pri tyazheloi forme obstruktivnogo apnoe sna: otdalennye rezul'taty.

OBJECTIVE: To assess the severity of daytime sleepiness and the level of sleep apnea/hypopnea index (AHI), as well as the possibility of their correction, in the long-term period after uvulopalatoplasty (UPP) in patients suffering from obesity and obstructive sleep apnea syndrome (OSAS). MATERIAL AND METHODS: We retrospectively analyzed the data of the patients, who requested a consultation due to nighttime snoring, witnessed sleep apneas and daytime drowsiness. We included men and women of ages 40 to 65 (24 male, 17 female) without cardiac or lung insufficiency. Group 1 consisted of 19 patients, who underwent UPP 3-5 years prior to current consultation. Group 2 consisted of 22 patients, who underwent UPP 6-12 earlier, despite prior diagnosis of severe OSAS. We performed cardiorespiratory sleep monitoring, additionally patients completed the Epworth scale and sleep quality scale. Patients were re-interviewed 2 months after initiation of CPAP therapy and or intraoral device treatment. RESULTS: Group 1 (n=19) displayed obesity (Body Mass Index 34.2±6.1 kg/m2), severe OSAS (AHI 55.2±18.5), high level of daytime drowsiness (Epworth score 18.7±6.3) and low sleep quality (13.0±6.8 sleep quality score). Group 2 (n=22) displayed reduction in AHI level - significant statistically, but not clinically without changes in daytime drowsiness and sleep quality, which were improved in 29 cases out of 41 with the help of CPAP-therapy (18 cases) or intraoral fixation devices (11 cases). CONCLUSION: UPP does not exert a clinically significant affect the severity of sleep disturbance in patients with obesity and severe OSAS. Night sleep study is essential before making a decision about UPP. Clinical state correction of patients in the long-term period of UPP is possible with the help of CPAP therapy or intraoral fixation devices.

Neuroprotective effect of 6-hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline mediated via regulation of antioxidant system and inhibition of inflammation and apoptosis in a rat model of cerebral ischemia/reperfusion.

The aim of the study was the assessment of the neuroprotective potential of 6-hydroxy-2,2,4-trimethyl-1,2-dihydroquinoline (DHQ) and its effect on inflammation, apoptosis, and transcriptional regulation of the antioxidant system in cerebral ischemia/reperfusion (CIR) in rats. The CIR rat model was constructed using the bilateral common carotid artery occlusion followed by reoxygenation. DHQ was administered at a dose of 50 mg/kg for three days. Histological staining was performed using hematoxylin and eosin. The level of S100B protein, 8-hydroxy-2-deoxyguanosine, and 8-isoprostane was assessed using an enzyme immunoassay. The intensity of apoptosis was assessed based on the activity of caspases and DNA fragmentation. The activity of enzymes was measured spectrophotometrically, the level of gene transcripts was assessed by real-time PCR. DHQ reduced the histopathological changes and normalized levels of S100B, lactate, pyruvate, and HIF-1 mRNA in the CIR rat model. In addition, DHQ decreased the oxidative stress markers in animals with a pathology. The tested compound also inhibited inflammation by decreasing the activity of myeloperoxidase, expression of interleukins and Nfkb2. DHQ-treated rats with CIR showed decreased caspase activity, DNA fragmentation, and AIF expression. DHQ changed activity of antioxidant enzymes to the control values, decreased the expression of Cat, Gsr, and Nfe2l2, which was overexpressed in CIR, and activated the expression of Sod1, Gpx1, Gsta2, and Foxo1. DHQ showed a neuroprotective effect on CIR in rats. The neuroprotective effect involve mechanisms such as the inhibition of oxidative stress, leading to a reduction in the inflammatory response and apoptosis and the modulation of the antioxidant defense components.

[Cardiac arrest in obstructive sleep apnea syndrome: treatment options. Case series]. / Ostanovka serdtsa pri sindrome obstruktivnogo apnoe sna: vozmozhnosti lecheniya. Seriya sluchaev.

Clinical data of seven patients with severe obstructive sleep apnea, in whom episodes of asystole were recorded at night, is analyzed. In five of seven cases against the background of initiated CPAP therapy (all patients were compliant with the therapy), episodes of asystole were eliminated, and only two cases required the installation of a pacemaker. Conclusions are drawn about the possibility of asystole developing in the background of obstructive respiratory episodes during sleep in patients with severe OSAS and the preventive effect of CPAP therapy.

Extraction of the Neutron Charge Radius from a Precision Calculation of the Deuteron Structure Radius.

We present a high-accuracy calculation of the deuteron structure radius in chiral effective field theory. Our analysis employs the state-of-the-art semilocal two-nucleon potentials and takes into account two-body contributions to the charge density operators up to fifth order in the chiral expansion. The strength of the fifth-order short-range two-body contribution to the charge density operator is adjusted to the experimental data on the deuteron charge form factor. A detailed error analysis is performed by propagating the statistical uncertainties of the low-energy constants entering the two-nucleon potentials and by estimating errors from the truncation of the chiral expansion as well as from uncertainties in the nucleon form factors. Using the predicted value for the deuteron structure radius together with the very accurate atomic data for the difference of the deuteron and proton charge radii we, for the first time, extract the charge radius of the neutron from light nuclei. The extracted value reads r_{n}^{2}=-0.106_{-0.005}^{+0.007} fm^{2} and its magnitude is about 1.7σ smaller than the current value given by the Particle Data Group. In addition, given the high accuracy of the calculated deuteron charge form factor and its careful and systematic error analysis, our results open the way for an accurate determination of the nucleon form factors from elastic electron-deuteron scattering data measured at the Mainz Microtron and other experimental facilities.

[Migraine and Ménière's disease]. / Migren' i bolezn' Men'era.

The article describes a series of seven cases characterized by a change in the type of attack in the perimenopausal period: migraine attacks before menopause and cochleovestibular paroxysms after the onset of menopause. Clinical data and results of diagnostic tests are presented and the possible link of both attack variants with cervical pathology is discussed. The authors explain this dynamics by stem neural integrator dysfunction during hormonal changes.