AN EXPERIMENTAL SYSTEM FOR THE SIMULTANEOUS ESTIMATION OF MITOSTATIC AND LYMPHOTOXIC EFFECTS OF IMMUNOSUPPRESSANTS AND CYTOSTATICS

Sublethally (600 R) irradiated (CBA x C57BL)F1 mice were grafted intravenously with parental lymph node cells in doses ranging from 0.2 x 106 to 12 x 106. The transplantation of these lymphoid cells leads to inactivation of the recipient's endogenous CFU (as measured by the diminution of the number of colonies registered on the 10th day after irradiation). A 50% inactivation was observed when the graft size of the CBA cells was 0.52 x 106. This figure for C57BL cells was 10 times more. This experimental system evaluates two simultaneously developing processes: the multiplication of endogenous CFU and the homograft reaction of transplanted lymphocytes against them. Both processes can be quantitatively estimated simultaneously in the same experiment by the determination of the number of colonies in corresponding experimental groups. Thus it was possible in a single experiment to compare quantitatively the effect of immunosuppressants on two points: (a) mitostatic action (suppression of CFU) and (b) lymphotoxic action. The latter, a true immunosuppressive effect, represents suppression of GVH activity of lymphoid cells and is demonstrated by abolition of the inhibition of endogenous colony formation. In the present system we have tested 6-MP, ALS, cyclophosphamide, hydrocortisone, and other drugs. The definite mitostatic and lymphotoxic doses of drugs are ascertained. Cyclophosphamide and ALS proved to be drugs with high dose ranges of selective lymphotoxic action. Hydrocortisone acetate had a more narrow range of selective lymphotoxic effect. 6-MP and Imuran (azathioprine) failed to exert any selective action on lymphoid elements. They possessed pronounced mitostatic efficiency, however

M1-like macrophages are potent producers of anti-viral interferons and M1-associated marker-positive lung macrophages are decreased during rhinovirus-induced asthma exacerbations

Background Macrophages (Mф) can be M1/M2 polarized by Th1/2 signals, respectively. M2-like Mф 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 Mф phenotype responses to rhinovirus (RV) infection in vitro and (ii) to assess Mф 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 Mф (MDM, from 3–6 independent donors) in vitro and evaluated frequencies of M1/M2-like bronchoalveolar lavage (BAL) Mф 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 Mф in asthma during experimental RV16 infection compared to baseline (P = 0.024). Interpretation Human M1-like BAL Mф 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. Funding ERC FP7 Advanced grant 233015, MRC Centre Grant G1000758, Asthma UK grant 08–048, NIHR Biomedical Research Centre funding scheme, NIHR BRC Centre grant P26095, the Predicta FP7 Collaborative Project grant 260895, RSF grant 19-15-00272, Megagrant No 14.W03.31.0024

Особенности фармакокинетики антисмысловых олигонуклеотидных препаратов

This review covers the pharmacokinetic characteristics of the various antisense oligonucleotide drugs. A comparison of the pharmacokinetics of drugs first and second generation. As well as the influence on the pharmacokinetics of the chemical modification of the molecule.В обзоре рассмотрены фармакокинетические особенности различных антисмысловых олигонуклеотидных препаратов. Проведено сравнение фармакокинетики препаратов первого и второго поколения. А так же рассмотрено влияние на фармакокинетику химической модификации молекулы

Микробициды для топической иммунопрофилактики ВИЧ-инфекции

Microbicides are antiseptic topical drugs that help directly or indirectly inhibit the penetration of an infectious agent into the human body, thereby preventing the sexual transmission of HIV-infection and other sexually transmitted diseases. Microbicides have an antiviral mechanism of action in the sexual transmission of HIV and affect the components of mucosal immunity in the vagina. In this article, the pharmaceutical and biomedical aspects of microbicide application are examined and diverse classifications of microbicides are presented. For each group of chemicals, the most important representatives and their mechanisms of action are described. This article also presents the structure and function of mucosal immunity, and shows the importance of the mucosal immune response in the sexual transmission of HIV. This work also exhibits the experimental models for testing of candidate microbicides. For each compound described, a review of preclinical research and clinical trials is provided, covering its development as a microbicide. This paper gives an overview of microbicides, a new class of chemically diverse immunobiological medications reducing the risk of sexual transmission of HIV. The use of microbicides is believed to curb the HIV/AIDS epidemic in the nearest future.Микробициды являются антисептическими топическими лекарственными средствами, способствующими напрямую или опосредованно сдерживать проникновение инфекционного агента в организм человека, тем самым предотвращая половую передачу вируса иммунодефицита человека (ВИЧ) и других заболеваний, передающихся половым путем. Они обладают не только прямым местным противовирусным механизмом действия при половой передаче ВИЧ, но и влияют на компоненты мукозального иммунитета во влагалище.В данной статье авторами рассмотрены фармацевтические и биомедицинские аспекты применения кандидатных микробицидов, представлены разнообразные классификации этих препаратов, описаны наиболее значимые представители каждой химической группы, указаны механизмы их действия. Помимо этого даны представления о структуре и функции мукозального иммунитета и показана значимость мукозального иммунного ответа на вирус при половой передаче ВИЧ-инфекции. Отдельно рассматриваются экспериментальные модели, которые применяются для тестирования кандидатных микробицидов. Для каждого описанного в статье химического соединения представлен краткий обзор доклинических и клинических исследований по разработке на его основе микробицида. Даны общие представления о таком новом разнообразном классе медицинских иммунобиологических препаратов, как микробициды, которые должны в ближайшем будущем уменьшить риск половой передачи ВИЧ и сдержать эпидемию ВИЧ-инфекции и синдрома приобретенного иммунодефицита (СПИД)

Studying the pharmacokinetics of biotechnological medicinal products on the example of monoclonal antibodies

Therapeutic monoclonal antibodies (mAbs), which are developed to treat many pathologies, including cancer, autoimmune and infectious diseases, are one of the fastest growing classes of medicinal products. Given the large number of mAbs in the pipeline and continued interest from pharmaceutical companies, the mAb market is expected to continue to grow in the coming years. To maximise both the therapeutic benefit and the safety of medicinal products in this class, it is essential that their pharmacological properties be carefully characterised and understood.The aim of the study was to analyse literature data on approaches to studying the pharmacokinetics of mAbs. This review presents data on the main physicochemical and pharmacological properties of mAbs and compares them with small molecules. The article describes the influence of various factors on mAb pharmacokinetics.For example, such factors include the method of administration, hydrophilicity, and charge of the mAb, individual characteristics of the patient (body weight, plasma albumin levels, genetic characteristics, etc.), and concurrent administration of other medicinal products. The authors evaluated the role of intra- and inter-individual variability of pharmacokinetic parameters. The rapid development of this group of medicinal products and the emergence of new promising molecules are indicative of the need to study the pharmacokinetics and pharmacodynamics of mAbs in detail and to maximise both the therapeutic benefit and the safety of the medicinal products in this class

Analysis of pneumococcal serotypes distribution to determine a model composition for a Russian pneumococcal conjugate vaccine

Diseases caused by Streptococcus pneumoniae, as well as antibiotic resistance of its serotypes, are the leading cause of death amongst children worldwide. To prevent pneumococcal infection, the population is immunised with conjugate vaccines containing different amounts of polysaccharides of certain serotypes. Development of a full-cycle Russian vaccine is vital because the active pharmaceutical ingredients for the vaccines registered in the Russian Federation are produced abroad, and only the final stages of production of vaccines of this group are performed in the territory of the Russian Federation. Considering the phenomenon of serotype replacement associated with the long-term widespread use of pneumococcal conjugate vaccines, it is necessary to carefully select the serotype composition for the new vaccine. The aim of this work was to analyse the serotype distribution of pneumococci in the Russian Federation and other countries in order to select optimal serotypes for the Russian vaccine for human use, taking into account vaccination schedules for each age group. This review presents an analysis of the pneumococcal serotype distribution in the Russian Federation in the pre-vaccination era, as well as after the introduction of routine vaccination. In addition, the review includes data on the serotype distribution in the Eurasian Economic Union countries. The authors described a model composition containing at least sixteen serotypes. It will increase effectiveness of immune protection of the population, providing a more complete coverage of serotypes, considering their prevalence in the Russian Federation. Based on the analysis, the serotype composition for the sixteen-valent pneumococcal conjugate vaccine is proposed for further production and preclinical and clinical trials. A new Russian pneumococcal conjugate vaccine will ensure vaccination of all population groups within the National Immunisation Schedule of the Russian Federation

Генетические факторы, влияющие на проникновение ВИЧ в клетку-мишень

Succeptibility to HIV and the dynamics of HIV infection progression to AIDS are dependent on unique individual factors. Revealing genetic features of natural resistance to HIV infection is of great importance for the development of effective strategies for disease control. This review presents an analysis of host gene alleles coding receptors and their ligands participating in viral entrance to target cell. These allelic variants and their combinations can have a significant influence on the individual resistance/sensitivity to HIV infection and may be associated with the HIV infection progression to AIDS.Восприимчивость к ВИЧ-инфекции, а также динамика развития заболевания носят индивидуальный характер. Раскрытие генетических основ естественной резистентности к ВИЧ чрезвычайно важно для выработки эффективных стратегий контроля заболевания. Обзор посвящен анализу аллельных вариантов генов хозяина, которые кодируют рецепторы и их лиганды, участвующие в процессе проникновения вируса в клетку-мишень. Эти аллельные варианты и их сочетания способны оказывать значимое влияние на устойчивость либо чувствительность индивидуума к ВИЧ-инфекции, а также могут быть ассоциированы со скоростью прогрессии ВИЧ-инфекции в СПИД