A B ST R AC T Human retinoblastoma cells were proven to possess some very unusual DNApolβ species. Being 23.5 kDa monomers, which itself is not common for the DNApolβ superfamily members, these chromatin associated proteins manifests most of the DNApolβ-specifc functional peculiarities making them legitimate targets for DNA repair cytostatic inhibitors. Particularly, these tumor specific enzymes were found to be very sensitive to -promoted magnetic isotope effects (MIE) caused a marked DNA sequence growth limitation as well as a formation of the size-invalid, i.e. too short in length, DNA fragments, totally inappropriate for the DNA repair purpose. This MIE-DNApolβ match may serve a starting point for further move towards the paramagnetic path in current developments of anti-cancer strategies.K E Y WO R D S retinoblastoma; magnetic isotope effects (MIE); DNA repair

Background: Macrophages (ML) can be M1/M2 polarized by Th1/2 signals, respectively. M2-like ML are thought to be important in asthma pathogenesis, and M1-like in anti-infective immunity, however their roles in virus-induced asthma exacerbations are unknown. Our objectives were (i) to assess polarised ML phenotype responses to rhinovirus (RV) infection in vitro and (ii) to assess ML phenotypes in healthy subjects and people with asthma before and during experimental RV infection in vivo. Methods: We investigated characteristics of polarized/unpolarized human monocyte-derived ML (MDM, from 3À6 independent donors) in vitro and evaluated frequencies of M1/M2-like bronchoalveolar lavage (BAL) ML in experimental RV-induced asthma exacerbation in 7 healthy controls and 17 (at baseline) and 18 (at day 4 post infection) people with asthma. Findings: We observed in vitro: M1-like but not M2-like or unpolarized MDM are potent producers of type I and III interferons in response to RV infection (P<0.0001), and M1-like are more resistant to RV infection (P<0.05); compared to M1-like, M2-like MDM constitutively produced higher levels of CCL22/MDC (P = 0.007) and CCL17/TARC (P<0.0001); RV-infected M1-like MDM were characterized as CD14 + CD80 + CD197 + (P = 0.002 vs M2-like, P<0.0001 vs unpolarized MDM). In vivo we found reduced percentages of M1-like CD14 + CD80 + CD197 + BAL ML in asthma during experimental RV16 infection compared to baseline (P = 0.024). Interpretation: Human M1-like BAL ML are likely important contributors to anti-viral immunity and their numbers are reduced in patients with allergic asthma during RV-induced asthma exacerbations. This mechanism may be one explanation why RV-triggered clinical and pathologic outcomes are more severe in allergic patients than in healthy subjects.

We have performed our study on a NEN-treated RB cell culture derived from a real clinical autopsy material. 3.5-year-old male donor has died of a massive complex abdominal trauma being previously RB-diagnosed with NMR and ultrasound tests, tumor located behind the eye globe equator line. This is a first report ever on magnetic isotope effects of metal ions to cause the clear anti-cancer consequences in retinoblastoma cells by depriving them of the DNA repair capabilities. Both molecular mechanism of phenomenon and its possible meaning for retinoblastoma chemotherapy are presented here.

Objective To evaluate the incidence and clinical relevance of silent nontarget occlusion (NTO) of superficial and deep veins occurring after ultrasound-guided foam sclerotherapy (UGFS) that can be detected by serial duplex ultrasound scan (DUS). Methods This retrospective analysis evaluated the medical records of patients treated with UGFS at a private clinic in Moscow, Russia from 2015 to 2017. All patients underwent serial DUS at 1 to 2 weeks and 1, 3, 6, and 12 months after UGFS. Results During the observation period, 268 patients were treated with UGFS, using physician compounded polidocanol foam 257 lower limbs of 196 patients (73%) with varicose veins who underwent DUS at 1 to 2 weeks after the last session of UGFS (inclusion time-point): 139 women and 57 men (mean age: 44.2 ± 12.2 years) with the following CEAP clinical class distribution: C2, 74.0%; C3, 20.0%; C4, 4.5%; and C5, 1.5%. NTO at the inclusion time-point occurred in 60 limbs (23.3%) of 57 patients (28.5%) and was symptomatic only in three limbs (1.2%). Most occlusions were localized in the untreated great saphenous vein trunk ( n = 28) and the calf muscle veins ( n = 23). Overall, 72%, 44%, 29%, and 10% of all limbs and 77%, 45%, 28%, and 12% of limbs with NTO were followed up by DUS at 1, 3, 6, and 12 months, respectively. There were no cases of thrombus progression or symptomatic venous thromboembolism (VTE). At six months, no deep vein occlusions persisted. Conclusions The frequency of nontarget vein occlusion after UGFS revealed by serial DUS may be as high as 23.3%. These occlusions tend to resolve within six months and are not associated with symptomatic VTE.

An arginine-rich peptide dendrimer, LTP, is a new low-toxicity promising tool for intracellular gene delivery.

The variety of dermatological manifestations in patients with the novel coronavirus infection COVID-19, the incidence of which depends on concomitant pathology and the characteristics of drug treatment, and their characteristics are similar to those that occur with conventional viral infections is discussed. At the present time it is proposed to distinguish several groups depending on the cause and mechanism of development: angiitis of the skin; papulo-squamous rash and pink lichen; measles rash and infectious erythema; papulo-vesicular rash; toxidermia; urticarial eruptions and artifical lesions. The variety of the clinical picture of the skin manifestations of coronavirus infection requires in-depth analysis in order to interpret correctly the skin lesions and other infectious exanthema and dermatoses in patients with COVID-19.

Одним из доброкачественных образований кожи является себорейный невус Ядассона (NSJ) -гамартома, локализующаяся преимущественно на коже лица или волосистой части головы и одинаково часто встречающаяся у мужчин и женщин. Плюрипотентные первичные эпителиальные клетки, входящие в структуру NSJ, являются благоприятной средой для развития на его фоне как доброкачественных, так и злокачественных опухолей. Для исключения неопластической трансформации целесообразно удалять NSJ сразу после полового созревания. При невозможности хирургического вмешательства пациентам требуется постоянное динамическое наблюдение. В данной работе представлено два случая успешного удаления СО 2 -лазером NSJ у пациентов молодого возраста.Ключевые слова: невус себорейный Ядассона, доброкачественные образования кожи, злокачественная трансформация невуса, удаление СО 2 -лазером Для корреспонденции: Гайдина Татьяна Анатольевна ул. Островитянова, д. 1, г. Москва, 117997;

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