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1.
Mol Biol (Mosk) ; 55(5): 829-845, 2021.
Artigo em Russo | MEDLINE | ID: mdl-34671005

RESUMO

Intratumoral heterogeneity and clonal variability are among the central problems of clinical oncology, leading to resistance to therapy, relapse, and metastasis. High-throughput sequencing of the tumor exome makes it possible to investigate the subclonal tumor organization. Target panel, clinical exome, and complete exome sequencing data were compared in tumors with different mutational burden, acute myeloid leukemia (AML) in children and acral melanoma. Targeted sequencing of AML samples detected more than one potential driver mutation in the signaling pathway genes KIT, NRAS, KRAS, CBL, and FLT3 in one patient, reflecting the complex clonal structure of the tumor substrate. Clusters of mutant alleles corresponding to different populations of leukemic cells in a sample were isolated based on exome sequencing data from the same AML patients. A comparison of the mutation profile for a primary AML sample and samples obtained in remission and relapse made it possible to trace the dynamic changes in the clonal composition of the tumor. The subclonal tumor structure was investigated in an acral melanoma case as an example. Mutant alleles present in the sample with close frequencies were clustered using the SciClone and ClonEvol packages. The results were used to predict the intratumoral clonal composition and to assume a clonal evolution model, which described the changes in the clonal composition of the tumor during metastasis, including the appearance of new mutations that might be associated with further disease progression. The approach used in the work is suitable for identifying the mutations that cause the formation of new tumor clones, which may have a proliferative advantage, in particular, in conditions of antitumor therapy.


Assuntos
Leucemia Mieloide Aguda , Melanoma , Neoplasias Cutâneas , Criança , Evolução Clonal/genética , Sequenciamento de Nucleotídeos em Larga Escala , Humanos , Leucemia Mieloide Aguda/genética , Melanoma/genética
2.
Mol Biol (Mosk) ; 55(3): 412-421, 2021.
Artigo em Russo | MEDLINE | ID: mdl-34097676

RESUMO

Molecular profiling of tumors may provide promising options for personalized treatment. We have examined the spectrum of germline and somatic mutations in 23 breast cancers (ВС) of various molecular subtypes, including tumors 1) with expression of estrogen, progesterone and/or epidermal growth factor receptor HER2/neu, and 2) with a triple negative phenotype. Genomic DNA specimens were isolated from archived tumor and normal tissue samples and subjected to targeted sequencing of the coding regions of 25 cancer-associated genes with a mean coverage of x 1000. In the triple negative subtype of ВС, the pathogenic germline mutations BRCA1 c.66_67delAG (185delAG) and BRCA1 c.3226_3227AG (3347delAG) were detected, while the germline mutation BRCA2 658_659del (886delGT) was found in patients with positive receptor staining. Mutations in BRCAl/2 were overrepresented by frequency (80%), pointing at common loss of heterozygosity affecting the normal allele. Somatic mutations in the TP53 gene were found in 7/10 (70%) patients with the triple negative subtype of ВС and in 3/13 (23%) in the group with positive receptor staining. Additionally, in both groups of patients, somatic mutations of the PTEN, MSH2, MSH6, and MUTYH genes were detected.


Assuntos
Neoplasias da Mama , Proteína BRCA1/genética , Proteína BRCA2/genética , Neoplasias da Mama/genética , Feminino , Predisposição Genética para Doença , Células Germinativas , Mutação em Linhagem Germinativa , Humanos , Mutação
3.
Mol Biol (Mosk) ; 54(3): 389-397, 2020.
Artigo em Russo | MEDLINE | ID: mdl-32492002

RESUMO

Certain subtypes of acute myeloid leukemia occur as a result of the cooperation of several events these are, the formation of fusion genes as a result of chromosomal rearrangements, which leads to the disruption of cell differentiation, and the emergence of mutations that enhance cellular proliferation by activating intracellular signaling pathways. High-throughput sequencing methods reveal characteristic mutation spectra in leukemia associated with different chromosomal disorders. However, the role of mutation events in malignant cell transformation processes remains obscure. We searched for driver mutation events in leukemic cells containing the chimeric CBFB-MYH11 gene, which results from inversion of chromosome 16. Using target enrichment, the coding regions of 84 genes in genomes of 12 children with acute myeloid leukemia with inv(16) were investigated. Somatic mutations have been found in the genes of the proteins of intracellular signaling cascades mediated by receptor tyrosine kinases, such as KIT (41%), NRAS (25%), KRAS (17%), and FLT3 (8.3%). Comparative analysis of samples at the time of diagnosis and during remission was used to assess the role of mutations in the pathogenesis of the disease. Previously undescribed mutations in the KDM6A, NOTCH1, and IDH1 genes, which may be involved in leukemogenesis processes have been identified.


Assuntos
Inversão Cromossômica , Cromossomos Humanos Par 16 , Leucemia Mieloide Aguda , Mutação , Criança , Histona Desmetilases/genética , Humanos , Isocitrato Desidrogenase/genética , Leucemia Mieloide Aguda/genética , Receptor Notch1/genética
4.
Ter Arkh ; 92(3): 56-60, 2020 Apr 27.
Artigo em Russo | MEDLINE | ID: mdl-32598794

RESUMO

AIM: To study the intestinal microbiota changes in patients with bronchial asthma (BA). MATERIALS AND METHODS: 40 patients and 15 healthy individuals were included for the study. The microbiota study in feces samples was performed by sequencing the 16SpRNA gene. RESULTS: It was noted an increasing of theProteobacteriaproportion in the patients with BA. The fractions ofBetaproteobacteriaиGammaproteobacteriawere increased in the patients with allergic BA and at the same time, only theGammaproteobacteriapart was increased in patients with non-allergic form of BA. It was found an increase inBacilliand a decrease in the proportion bacteria forming butyrate (Anaerostipes, Faecalibacterium) and acetate (Alistipes), which was corresponded to a decrease in the proportion of strict anaerobic symbionts and an increase in the proportion of opportunistic facultative anaerobes. The relative bacteria amount was reduced for theNegativicutes Erysipelotrichia, Bacteroidia classes, theErysipelotrichaceae,Pseudomonadaceae, Rhodospirillaceae, Bacillaceae familiesand for the kinds ofBarnesiella, Paraprevotella, Pyrolobus, Bifidobacterium, Pseudomonas, Coprobacter, Bacillusin the allergic asthma patients with syndrome of intensive bacterial overgrowth (SIBO) cases. In the non-allergic asthma case, the presence of SIBO was accompanied by the relative bacteria amount increasing of theBacteroidaceaeand theParaprevotellafamilies and theOdoribacter,Bacteroides, Butyricicoccus, Parasutterellagenera. The bacterial spectrum changes correlated with the main clinical and laboratory manifestations of BA in the patients. CONCLUSION: The results have indicated the differences in the intestinal microflora composition of healthy volunteers and patients with bronchial asthma in including the SIBO presence. It is necessary more detail study of the bacterial composition changes in the intestine for the bronchopulmonary pathology case.


Assuntos
Asma , Microbioma Gastrointestinal , Microbiota , Bactérias , Fezes , Humanos
5.
Kardiologiia ; 60(3): 126-136, 2020 Jan 20.
Artigo em Russo | MEDLINE | ID: mdl-32375625

RESUMO

Deprescribing is a scheduled withdrawal, dose reduction, or replacement of a medicine with a safer one. Several groups of medicinal products (MPs) are used simultaneously in the treatment of chronic heart failure. This increases the risk of adverse drug reactions, particularly in elderly and senile patients. A systematic search for literature allowed evaluating possibilities of deprescribing for the following pharmaceutic groups: 1) MPs influencing the renin-angiotensin-aldosterone system; 2) beta-blockers; 3) digoxin; and 4) diuretics. Three systematic reviews and several studies were analyzed to determine the most feasible and potentially optimal regimens of deprescribing in CHF. It was established that in CHF, deprescribing has a very limited potential for use due to the documented, obvious effect of some MP groups on prediction and severity of clinical symptoms in CHF patients.


Assuntos
Desprescrições , Insuficiência Cardíaca , Antagonistas Adrenérgicos beta , Idoso , Diuréticos , Insuficiência Cardíaca/terapia , Humanos , Sistema Renina-Angiotensina
6.
Inflamm Res ; 69(5): 481-495, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-32157318

RESUMO

BACKGROUND: Hydrogen sulfide donors reduce inflammatory signaling in vitro and in vivo. The biological effect mediated by H2S donors depends on the kinetics of the gas release from the donor molecule. However, the molecular mechanisms of H2S-induced immunomodulation were poorly addressed. Here, we studied the effect of two different hydrogen sulfide (H2S)-producing agents on the generation of the LPS-induced inflammatory mediators. Importantly, we investigated the transcriptomic changes that take place in human cells after the LPS challenge, combined with the pretreatment with a slow-releasing H2S donor-GYY4137. METHODS: We investigated the effects of GYY4137 and sodium hydrosulfide on the release of proinflammatory molecules such as ROS, NO and TNF-α from LPS-treated human SH-SY5Y neuroblastoma and the THP-1 promonocytic cell lines. Transcriptomic and RT-qPCR studies using THP-1 cells were performed to monitor the effects of the GYY4137 on multiple signaling pathways, including various immune-related and proinflammatory genes after combined action of LPS and GYY4137. RESULTS: The GYY4137 and sodium hydrosulfide differed in the ability to reduce the production of the LPS-evoked proinflammatory mediators. The pre-treatment with GYY4137 resulted in a drastic down-regulation of many TNF-α effectors that are induced by LPS treatment in THP-1 cells. Furthermore, GYY4137 pretreatment of LPS-exposed cells ameliorates the LPS-mediated induction of multiple pro-inflammatory genes and decreases expression of immunoproteasome genes. Besides, in these experiments we detected the up-regulation of several important pathways that are inhibited by LPS. CONCLUSION: Based on the obtained results we believe that our transcriptomic analysis significantly contributes to the understanding of the molecular mechanisms of anti-inflammatory and cytoprotective activity of hydrogen sulfide donors, and highlights their potential against LPS challenges and other forms of inflammation.


Assuntos
Anti-Inflamatórios/farmacologia , Sulfeto de Hidrogênio/metabolismo , Inflamação/metabolismo , Morfolinas/farmacologia , Compostos Organotiofosforados/farmacologia , Sulfetos/farmacologia , Linhagem Celular , Citocinas/metabolismo , Humanos , Inflamação/induzido quimicamente , Inflamação/genética , Lipopolissacarídeos , Óxido Nítrico/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Transdução de Sinais/efeitos dos fármacos , Transcriptoma/efeitos dos fármacos
7.
Mol Biol (Mosk) ; 53(4): 648-653, 2019.
Artigo em Russo | MEDLINE | ID: mdl-31397438

RESUMO

Acral melanoma is one of the most aggressive and fast-growing forms of cutaneous melanoma and is characterized by a predominant location on the palms and feet. Primary tumors, metastases, and normal tissue samples from five acral melanoma patients were examined by massive parallel sequencing, focusing on the coding regions of 4100 genes involved in the origin and progression of hereditary and oncology diseases. Somatic mutations were found in genes related to cell division, proliferation, and apoptosis (BRAF, NRAS, VAV1, GATA1, and GCM2); cell adhesion (CTNND2 and ITGB4); angiogenesis (VEGFA); and the regulation of energy metabolism (BCS1L). Comparisons of target DNA sequences between morphologically normal and primary tumor tissues and between normal and metastatic tissues identified the candidate genes responsible for rapid metastasis in acral melanoma.


Assuntos
Melanoma/genética , Melanoma/patologia , Mutação , Metástase Neoplásica/genética , Neoplasias Cutâneas/genética , Neoplasias Cutâneas/patologia , Humanos , Análise de Sequência de DNA
8.
Artigo em Russo | MEDLINE | ID: mdl-31317906

RESUMO

The review deals with the problem of polypragmasia and associated adverse drug reactions, which is very relevant for the elderly and senile age. Based on the frequent unjustified prescription of antipsychotic drugs in clinical practice and the serious consequences associated with it, especially in elderly people with cognitive impairment, the aim of this review was to analyze the current literature and an evidence base for antipsychotic therapy optimization in elderly. One of the most effective way to decrease drug-associated harm is deprescribing, the planned process of decreasing dose, discontinuation of drug or switching to another one aimed to improve quality of life of the patient. The article describes different types of deprescribing, presents the results of the analysis of literature on deprescribing of antipsychotics in long-term use in elderly patients with dementia. Central to this is the analysis of a systematic review of Cochrane E. Van Leeuwen and co-authors (2018), the leading research in the evidence base of deprescribing. Based on the available literature, the authors make the conclusion about the safety of deprescribing of antipsychotic drugs. The effect of abrupt discontinuation of treatment with antipsychotic drugs was evaluated in available literature. Most of the evidence relates only to residents of nursing homes or to patients in long-term psychogeriatric or geriatric wards (in-patient treatment). However, the evidence base of deprescribing of antipsychotic drugs is small, many studies have methodological limitations, the initial characteristics of the patients included in the study are extremely heterogeneous, methodologies for diagnosing and determining the severity of dementia, types and dosages of antipsychotic drugs, duration of observation periods differed greatly. Attention is drawn to the short duration of observation periods. All of the above dictates the need for specially planned randomized clinical trials, the results of which will develop detailed algorithms for deprescribing antipsychotics.


Assuntos
Antipsicóticos , Demência , Desprescrições , Idoso , Antipsicóticos/uso terapêutico , Demência/tratamento farmacológico , Humanos , Pacientes , Qualidade de Vida , Revisões Sistemáticas como Assunto
9.
Mol Biol (Mosk) ; 53(3): 402-410, 2019.
Artigo em Russo | MEDLINE | ID: mdl-31184605

RESUMO

The discovery of novel significant molecular and genetic markers is important for the diagnostics, prognosis, and therapy selection in hematological malignancies. Distinct cytogenetic aberrations leading to the formation of fusion genes are found in more than 40% of pediactric cases of acute myeloid leukemia (AML); however, the tumor cells in approximately 20% of these patients display cytogenetically normal karyotype (NK-AML). Here we present the analysis of the mutational profiles of leukemic cells collected from pediatric AML cases without known clinically significant chromosomal aberrations aimed at identifying AML specific markers. In 34 pediatric cases of different AML types, the coding regions of 26 genes involved in the AML pathogenesis were analyzed by massive parallel sequencing. Sequencing revealed the somatic mutations in genes that are involved in various intracellular signaling pathways, including the CEBPA, ETV, IDH1, JAK2, and NRAS genes. In addition, rare genetic variants were found in CUX1, FLT3, TET2, PTPN11, and NUP98 genes. This data may contribute to the understanding of the mechanisms of malignant cell transformation in the case of leukemogenesis.


Assuntos
Análise Mutacional de DNA , Leucemia Mieloide Aguda/classificação , Leucemia Mieloide Aguda/genética , Mutação , Criança , Aberrações Cromossômicas , Humanos , Prognóstico
10.
Mol Biol (Mosk) ; 52(4): 595-600, 2018.
Artigo em Russo | MEDLINE | ID: mdl-30113025

RESUMO

Understanding the molecular mechanisms of plant response to unfavorable conditions is necessary for the effective selection of tolerant genotypes. Earlier, using high-throughput transcriptome sequencing of flax plants after exposure to aluminum ions (Al^(3+)) and high soil acidity, we detected stress-induced alteration in the expression of several genes, including CAX3, which encodes Ca^(2+)/H^(+)-exchanger involved in calcium ion transport. Here we describe CAX3 mRNA levels in flax cultivars either tolerant (Hermes and TMP1919) or sensitive (Lira and Orshanskiy) to Al^(3+). Stress-induced increased expression of CAX3 was detected only in aluminum-tolerant flax cultivars. The product of CAX3 gene may participate in flax response to high soil acidity and high Al^(3+) concentration through Ca^(2+)-mediated intracellular regulation.


Assuntos
Antiporters/genética , Linho/genética , Proteínas de Plantas/genética , Solo/química , Ácidos/toxicidade , Alumínio/toxicidade , Linho/efeitos dos fármacos , Linho/crescimento & desenvolvimento , Regulação da Expressão Gênica de Plantas , Genótipo , Sequenciamento de Nucleotídeos em Larga Escala , RNA Mensageiro/genética , Estresse Fisiológico
11.
Mol Biol (Mosk) ; 52(2): 220-230, 2018.
Artigo em Russo | MEDLINE | ID: mdl-29695690

RESUMO

Glycolysis activation is one of the main features of energy metabolism in cancer cells that is associated with the increase in glycolytic enzyme synthesis, primarily, hexokinases (HKs), in many types of tumors. Conversely, in colorectal cancer (CRC) the decrease in the expression of HK2 gene, which encodes one of the key rate-limiting enzyme of glycolysis, was revealed, thus, the study of the mechanisms of its inhibition in CRC is of particular interest. To search for potential microRNAs, inhibiting the expression of HK2 in CRC, we have performed the analysis of data from "The Cancer Genome Atlas" (TCGA) and five microRNA-mRNA target interaction databases (TargetScan, DIANA microT, mirSVR (miRanda), PicTar, and miRTarBase) using original CrossHub software. Seven microRNAs containing binding site on mRNA HK2, which expression is negatively correlated with HK2 expression, were selected for further analysis. The expression levels of these microRNAs and mRNA HK2 were estimated by quantitative PCR on a set of CRC samples. It has been shown, that the expression of three microRNAs (miR-9-5p, -98-5p, and -199-5p) was increased and correlated negatively with mRNA level of HK2 gene. Thus, downregulation of HK2 gene may be caused by its negative regulation through microRNAs miR-9-5p, -98-5p, and -199-5p.


Assuntos
Neoplasias Colorretais/metabolismo , Regulação para Baixo , Regulação Enzimológica da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Hexoquinase/biossíntese , MicroRNAs/metabolismo , Proteínas de Neoplasias/biossíntese , RNA Neoplásico/metabolismo , Neoplasias Colorretais/genética , Neoplasias Colorretais/patologia , Feminino , Hexoquinase/genética , Humanos , Masculino , MicroRNAs/genética , Proteínas de Neoplasias/genética , RNA Neoplásico/genética
12.
Mol Biol (Mosk) ; 52(2): 231-237, 2018.
Artigo em Russo | MEDLINE | ID: mdl-29695691

RESUMO

Genetic aberrations in leukemia often lead to the formation of expressed chimeric genes, which should be assessed for proper diagnosis and therapy. Modern methods of molecular diagnostic mainly allow to identify already known fusion genes. RNAseq is an efficient tool for identification of rare and novel chimeric transcripts. Here we present the results of the whole transcriptome analysis of bone marrow samples from five patients with acute myeloblastic leukemia and one, with myelodysplastic syndrome. The whole-transcriptome analysis was performed using Illumina/Solexa approach. We found rare or unknown chimeric transcripts including ETV6-MDS1, MN1-ETV6, OAZ1-PTMA, and MLLT10-GRIA4. Each of these transcripts was confirmed by RT-PCR and Sanger sequencing.


Assuntos
Sequenciamento de Nucleotídeos em Larga Escala , Leucemia , Proteínas de Fusão Oncogênica , RNA Mensageiro , RNA Neoplásico , Transcriptoma , Adolescente , Pré-Escolar , Feminino , Humanos , Lactente , Recém-Nascido , Leucemia/genética , Leucemia/metabolismo , Masculino , Proteínas de Fusão Oncogênica/biossíntese , Proteínas de Fusão Oncogênica/genética , RNA Mensageiro/biossíntese , RNA Mensageiro/genética , RNA Neoplásico/biossíntese , RNA Neoplásico/genética
13.
Mol Biol (Mosk) ; 52(6): 1082-1092, 2018.
Artigo em Russo | MEDLINE | ID: mdl-30633251

RESUMO

The accumulation and aggregation of ß-amyloids are major molecular events underlying the progression of Alzheimer's disease. In neural cells, recombinant HSP70 reduces the toxic effect of Aß and its isomeric forms. Here we describe the proteome of the neuroblastoma cell line after incubation with amyloid peptides Aß42 and isomerized Asp7 (isoAß42) without and with human recombinant heat shock protein 70 (HSP70). Incubation of SH-SY5Y cell culture with the synthetic Aß-peptides leads to a decrease in the levels of several cytoskeleton proteins (e.g., ACTN1, VIME, TPM3) and several chaperonines involved in the folding of actin and tubulin (TCPQ, TCPG, TCPE, TCPB). These changes are accompanied by an increase in the expression of calmodulin and the proteins involved in folding in the endoplasmic reticulum and endoplasmic cell stress response. The presence of exogenous HSP70 has led to an increase in expression of several chaperones and a few other proteins including endogenous HSP70. A combined effect of recombinant HSP70 with Aß peptides reduced cell apoptosis and significantly decreased the level of tubulin phosphorylation caused by the addition of Aß peptides.


Assuntos
Peptídeos beta-Amiloides/metabolismo , Proteínas de Choque Térmico HSP70/metabolismo , Neuroblastoma/metabolismo , Proteoma , Linhagem Celular Tumoral , Humanos , Fragmentos de Peptídeos
14.
Mol Biol (Mosk) ; 51(5): 849-856, 2017.
Artigo em Russo | MEDLINE | ID: mdl-29116073

RESUMO

Targeted cancer therapy directed at individual targets is often accompanied by the rapid development of drug resistance. The development of a new generation of antitumor drugs involves the search for many targets simultaneously to block or, conversely, restore their activity. In this regard, simultaneous analysis of gene expression in a complex network of interactions, primarily cell cycle control elements, is relevant for the search of specific molecular markers for the differential diagnosis of adenocarcinoma (ADC) and squamous cell lung cancer (SCC), as well as new targets for therapy. In this paper we performed an extended quantitative analysis of the expression of two suppressor genes, CTDSPL and its target RB1, as well as 84 genes of the main participants of the p16^(INK4A)-Cdk/cyclin D1-Rb and p53/p21^(Waf1) signaling pathways in the histological types of non-small-cell lung cancer (NSCLC), i.e., ADC and SCC, using the special panel of the Human Cell Cycle Regulation Panel. The expression profile of some genes shows the specificity to the histological type of NSCLC and the presence of metastases. The genes with a significantly increased expression that affect the activity of Rb (cyclins, cyclin-dependent kinases, their activators, inhibitors, etc.) can serve as potential targets for combined therapy of both ADC and SCC.


Assuntos
Adenocarcinoma , Carcinoma de Células Escamosas , Proteínas de Ciclo Celular , Ciclo Celular , Regulação da Expressão Gênica , Neoplasias Pulmonares , Proteínas de Ligação a Retinoblastoma , Proteínas Supressoras de Tumor , Ubiquitina-Proteína Ligases , Adenocarcinoma/genética , Adenocarcinoma/metabolismo , Adenocarcinoma/patologia , Adenocarcinoma de Pulmão , Carcinoma de Células Escamosas/genética , Carcinoma de Células Escamosas/metabolismo , Carcinoma de Células Escamosas/patologia , Proteínas de Ciclo Celular/biossíntese , Proteínas de Ciclo Celular/genética , Feminino , Humanos , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/metabolismo , Neoplasias Pulmonares/patologia , Masculino , Proteínas de Ligação a Retinoblastoma/biossíntese , Proteínas de Ligação a Retinoblastoma/genética , Proteínas Supressoras de Tumor/biossíntese , Proteínas Supressoras de Tumor/genética , Ubiquitina-Proteína Ligases/biossíntese , Ubiquitina-Proteína Ligases/genética
15.
Mol Biol (Mosk) ; 51(5): 841-848, 2017.
Artigo em Russo | MEDLINE | ID: mdl-29116072

RESUMO

Using real-time RT-PCR in combination with bioinformatics, we have shown for the first time that the treatment of HCT-116 and HT-29 colon cancer cells with two anti-cancer agents (doxycycline or 3,3'-diindolylmethane) results in profound changes in the intracellular content of several lncRNAs (by up to 100 times). Since many of these RNAs are secreted by tumors into the bloodstream, the obtained results provide a basis for developing more sensitive protocols for serological monitoring of tumor relapse and metastasis, as well as for search of new anti-cancer drugs.


Assuntos
Antineoplásicos/farmacologia , Neoplasias do Colo/metabolismo , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , RNA Longo não Codificante/biossíntese , RNA Neoplásico/biossíntese , Linhagem Celular Tumoral , Neoplasias do Colo/tratamento farmacológico , Neoplasias do Colo/genética , Neoplasias do Colo/patologia , Humanos , RNA Longo não Codificante/genética , RNA Neoplásico/genética
16.
Mol Biol (Mosk) ; 51(2): 240-250, 2017.
Artigo em Russo | MEDLINE | ID: mdl-28537231

RESUMO

Relationships between viruses and their human host are traditionally described from the point of view taking into consideration hosts as victims of viral aggression, which results in infectious diseases. However, these relations are in fact two-sided and involve modifications of both the virus and host genomes. Mutations that accumulate in the populations of viruses and hosts may provide them advantages such as the ability to overcome defense barriers of host cells or to create more efficient barriers to deal with the attack of the viral agent. One of the most common ways of reinforcing anti-viral barriers is the horizontal transfer of viral genes into the host genome. Within the host genome, these genes may be modified and extensively expressed to compete with viral copies and inhibit the synthesis of their products or modulate their functions in other ways. This review summarizes the available data on the horizontal gene transfer between viral and human genomes and discusses related problems.


Assuntos
Transferência Genética Horizontal , Genes Virais , Genoma Humano , Proteínas Virais/genética , Vírus/genética , Humanos
17.
Mol Biol ; 51(2): 205-215, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-32214476

RESUMO

Relationships between viruses and their human host are traditionally described from the point of view taking into consideration hosts as victims of viral aggression, which results in infectious diseases. However, these relations are in fact two-sided and involve modifications of both the virus and host genomes. Mutations that accumulate in the populations of viruses and hosts may provide them advantages such as the ability to overcome defense barriers of host cells or to create more efficient barriers to deal with the attack of the viral agent. One of the most common ways of reinforcing anti-viral barriers is the horizontal transfer of viral genes into the host genome. Within the host genome, these genes may be modified and extensively expressed to compete with viral copies and inhibit the synthesis of their products or modulate their functions in other ways. This review summarizes the available data on the horizontal gene transfer between viral and human genomes and discusses related problems.

18.
Mol Biol (Mosk) ; 50(3): 387-94, 2016.
Artigo em Russo | MEDLINE | ID: mdl-27414777

RESUMO

Regulation of gene expression via microRNA is the key mechanism of response to biotic and abiotic stresses in plants. There are a lot of experimental data on the biological function of microRNAs in response to different stresses in various plant species. This review contains up-to-date information on molecular mechanisms of microRNA action in plants in response to abiotic stresses, including drought, salinity, mineral nutrient deficiency or imbalance.


Assuntos
Arabidopsis/genética , Regulação da Expressão Gênica de Plantas , Medicago truncatula/genética , MicroRNAs/genética , Oryza/genética , RNA de Plantas/genética , Arabidopsis/crescimento & desenvolvimento , Secas , Perfilação da Expressão Gênica , Medicago truncatula/crescimento & desenvolvimento , Anotação de Sequência Molecular , Oryza/crescimento & desenvolvimento , Folhas de Planta/genética , Salinidade , Estresse Fisiológico/genética
19.
Mol Biol (Mosk) ; 50(3): 504-8, 2016.
Artigo em Russo | MEDLINE | ID: mdl-27414789

RESUMO

Earlier we established that CTDSPL gene encoding small carboxy-terminal domain serine phosphatase can be considered a classical tumor suppressor gene. Besides, transfection of tumor cell line MCF-7 with CTDSPL led to the content decrease of inactive phosphorylated form of another tumor suppressor, retinoblastoma protein (Rb), and subsequently to cell cycle arrest at the G1/S boundary. This result implied that small phosphatase CTDSPL is able to specifically dephosphorylate and activate Rb protein. In order to add some fuel to this hypothesis, in the present work we studied the interaction of two tumor suppressors CTDSPL and Rb in vitro. GST pool-down assay revealed that CTDSPL is able to precipitate Rb protein from MCF-7 cell extracts, while surface plasmon resonance technique showed that interaction of the two proteins is direct. Results of this study reassert that phosphatase CTDSPL and Rb could be involved in the common mechanism of cell cycle regulation.


Assuntos
Proteínas Recombinantes de Fusão/metabolismo , Proteína do Retinoblastoma/metabolismo , Proteínas Supressoras de Tumor/metabolismo , Escherichia coli/genética , Escherichia coli/metabolismo , Pontos de Checagem da Fase G1 do Ciclo Celular/genética , Expressão Gênica , Humanos , Imunoprecipitação , Células MCF-7 , Transportadores de Ânions Orgânicos/genética , Transportadores de Ânions Orgânicos/isolamento & purificação , Transportadores de Ânions Orgânicos/metabolismo , Ligação Proteica , Proteínas Recombinantes de Fusão/genética , Proteínas Recombinantes de Fusão/isolamento & purificação , Proteína do Retinoblastoma/genética , Proteína do Retinoblastoma/isolamento & purificação , Ressonância de Plasmônio de Superfície , Proteínas Supressoras de Tumor/genética , Proteínas Supressoras de Tumor/isolamento & purificação
20.
Mol Biol (Mosk) ; 49(5): 716-27, 2015.
Artigo em Russo | MEDLINE | ID: mdl-26510590

RESUMO

The major problem in prostate cancer treatment is the development of drug resistance and especially important, cross-resistance. The mechanisms of drug resistance, which are divided into ligand-dependent (requiring the presence of androgens in the cell) and independent (not requiring the presence of androgens) are reviewed. The mechanisms are mainly represented with mutations of the androgen receptor and expression of aberrant constitutively active splice variants, as well as up-regulation of genes involved in androgens synthesis.


Assuntos
Antineoplásicos/uso terapêutico , Resistência a Múltiplos Medicamentos/genética , Resistencia a Medicamentos Antineoplásicos/genética , Regulação Neoplásica da Expressão Gênica , Neoplasias da Próstata/genética , Androgênios/metabolismo , Humanos , Masculino , Fosfatidilinositol 3-Quinases/genética , Fosfatidilinositol 3-Quinases/metabolismo , Inibidores de Fosfoinositídeo-3 Quinase , Próstata/efeitos dos fármacos , Próstata/metabolismo , Próstata/patologia , Neoplasias da Próstata/tratamento farmacológico , Neoplasias da Próstata/metabolismo , Neoplasias da Próstata/patologia , Proteínas Proto-Oncogênicas c-akt/antagonistas & inibidores , Proteínas Proto-Oncogênicas c-akt/genética , Proteínas Proto-Oncogênicas c-akt/metabolismo , Splicing de RNA/efeitos dos fármacos , Receptores Androgênicos/genética , Receptores Androgênicos/metabolismo
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