Russian Journal of Biotherapy最新文献

{"title":"Development of the test system based on enzyme immunoassay for the detection of recombinant Streptococcus pneumoniae pneumolysin","authors":"E. A. Kurbatova, I. V. Yakovleva, N. F. Gavrilova, D. S. Vorobyev, E. S. Petukhova, I. B. Semenova, A. E. Zaitsev, Y. V. Volokh, A. Leonova, A. Poddubikov, A. A. Kaloshin, I. M. Gruber","doi":"10.17650/1726-9784-2023-22-4-52-59","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-4-52-59","url":null,"abstract":"Backgraund. Pneumolysin (Ply) is a hemolytic toxin of Streptococcus pneumoniae (S. pneumoniae) expressed by all strains of pneumococci. The use of sandwich enzyme-linked immunosorbent assay (ELISA) can be a simple, fast and effective way of its qualitative and quantitative determination in biological fluids.Aim. To develop and evaluate the specificity of sandwich ELISA test system for qualitative and quantitative determination of recombinant Ply (rPly) of S. pneumoniae.Materials and methods. Immobilized on the solid phase rabbit’s polyclonal antibodies (pAbs) to rPly were used as recognition antibodies in sandwich ELISA. The studied antigens were added to the pAbs (rPly). The reaction was manifested by using detecting mouse monoclonal IgG1 (rPly) – antibodies conjugated with horseradish root peroxidase. The specificity of the test system was evaluated when using recombinant α-hemolysin (rα-Hly) and water-soluble S. aureus antigens as reference preparations.Results. Using sandwich ELISA, rPly was detected at a concentration of 0.15 µ / ml. The test system was characterized by specificity, which was confirmed by the absence of reaction with recombinant rα-Hly of Staphylococcus aureus (S. aureus). Reference preparations of water-soluble surface antigens of S. aureus strains No 209, 1986,1991 and Cowan I gave a false positive reaction due to the presence of protein A (SpA) in their composition, a thermostable surface protein expressed by many strains of staphylococci capable of binding immunoglobulins via Fc-fragment or Fab fragments of the V3H domain of the B cells receptor. A negative reaction was obtained with antigens from the S. aureus wood 46 strain, which does not have the spa gene encoding SpA expression. The presence of protein A in preparations of water-soluble S. aureus antigens was confirmed in the ELISA inhibition assay.Conclusion. Sandwich ELISA has been developed for qualitative and quantitative determination of S. pneumoniae Ply. The conducted studies have confirmed the specificity of the test system.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"567 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139242716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiparametric immunohistochemical analysis in cancer diagnosis (literary review)","authors":"I. Nabiev, M. Baryshnikova, Z. A. Sokolova, P. Sokolov, A. Karaulov","doi":"10.17650/1726-9784-2023-22-4-10-16","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-4-10-16","url":null,"abstract":"Introduction. Multiparametric comparative analysis of clinical and molecular genetic biomarkers of malignant tumors has strong diagnostic and prognostic potentials and is a prerequisite for the development of personalized medicine. This approach makes it possible not only to simultaneously detect the expression of several tumor biomarkers, but also to obtain data on their spatial distribution in tissues examined, as well as to estimate the mutual location of tumor cells and tumor microenvironment expressing specific biomarkers. Thus, multiparametric immunohistochemical analysis (IHCA), which allows not only confirming the specific disease, but also carrying out 3D imaging of biopsy specimens and analyzing the spatial organization of tumor tissue, as well as the expression rates of biomarkers at the level of individual cells, opens wide prospects in the diagnosis and treatment of cancer.Aim. Systematizing data on the potential of multiparametric IHCA for cancer diagnosis and development of the personalized approach to cancer therapy.Results. Multiparametric IHCA allows estimating the heterogeneity of the tumor at the level of molecular subtypes, as well as the heterogeneity of the tumor microenvironment. These data make it possible to predict tumor development, determine its metastatic potential, and select an effective strategy for individual therapy.Conclusion. This review analyzes the use of multiparametric IHCA for the detection of malignant tumors and shows its high potential for the differentiation of tumors and the study of tumor microenvironment. This ensures effective selection of the therapeutic strategy and accurate assessment of the response to therapy.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"38 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139250478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Principles and approaches in the development of fluorescent hydrogels for cancer diagnosis","authors":"P. Sokolov, P. S. Samokhvalov, D. A. Baranova, A. V. Sukhanova","doi":"10.17650/1726-9784-2023-22-4-17-27","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-4-17-27","url":null,"abstract":"Introduction. Early sensitive and highly specific diagnosis is crucial for successful cancer therapy. The use of fluorescent hydrogels (FHG) makes it possible to develop versatile biosensors due to the increased binding capacity of biological capture and reporter molecules, sensitive fluorescence detection, and the flexibility of combining their structural and functional elements.Aim. Analyzing the principles of designing biosensors based on FHG for the detection of cancer markers and the methodological approaches to their development, as well as summarizing and systematizing the data on the principles of detection and target signal generation used in these sensors.Results. FHG represent 3D sensing platforms, i. e., structures that combine the reporter fluorescence function with biological capture molecules, allowing the unique optical properties of fluorescent nanocrystals at the macro level to be preserved. The porous structure of hydrogels increases the active surface area of biosensors for 3D immobilization of fluorescent labels and biological capture molecules, while preserving the structure of these molecules, which ensures specific binding of the detected molecules of the sample. This ensures a higher sensitivity compared with the traditional methods of immunoenzymatic and immunochromatographic analyses. Not only the traditionally used antibodies, but also enzymes and glycoproteins, aptamers and oligonucleotides, as well as polymers obtained by molecular imprinting, can serve as biological capture molecules, which extends the range of specifically detectable analytes.Conclusion. The review presents examples of biosensors based on FHG intended for the detection of cancer markers and describes approaches to the preparation of FHG and immobilization of biological capture molecules, as well as principles of generation of the detected optical signal. The main advantages of fluorescent hydrogel biosensors over the classical tests used for quick diagnosis of cancer are shown.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"1 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139247095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of the IL-10 mRNA level in the peripheral blood of patients with cancer and benign prostatic hyperplasia","authors":"O. A. Korovin, A. V. Alyasova, Khalil Arioua, D. Novikov, N. V. Krasnogorova, V. V. Novikov","doi":"10.17650/1726-9784-2023-22-4-35-42","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-4-35-42","url":null,"abstract":"Background. Interleukin-10 (IL-10) is a pleiotropic cytokine with immunomodulatory properties and may inhibit tumor development and progression or stimulate tumor growth.Aim. Analysis of the changes of the IL-10 mRNA level in the peripheral blood (PB) of patients with prostate cancer (PC) and benign prostatic hyperplasia (BPH) in comparison with clinical and laboratory data.Materials and methods. 63 patients with histologically confirmed PC and 52 patients with histologically confirmed BPH were under observation. The control group consisted of 30 practically healthy persons comparable in age. Determination of the relative level of IL-10 mRNA in PB samples was performed by real-time reverse transcription polymerase chain reaction.Results. Both in patients with PC and in patients with BPH, a statistically significant decrease in the level of IL-10 mRNA in the PB of patients was observed in comparison with the control. In PC, the lowest levels were found in patients with a prostate-specific antigen (PSA) concentration above 10 ng / l and with a prostate volume of more than 50 cm3. Differences in the level of IL-10 mRNA at T2 and T3 stages and at different testosterone concentrations were not statistically significant, although there was a pronounced downward trend in prognostically unfavorable cases. Patients with BPH had a relative level of IL-10 mRNA, which was statistically significantly higher than in patients with PC. At PSA concentrations above 10 ng / mL, the level of IL-10 mRNA was also lower than at its lower concentrations.Conclusion. In patients with cancer and BPH, a reduced level of IL-10 mRNA was found in the PB. The decrease is more pronounced in the unfavorable course of diseases and, apparently, is a consequence of the instability of IL-10 mRNA at the post-transcriptional level.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"58 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139246906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Innate immunity cells in a model of acute psoriasis-like inflammation in mice","authors":"E. Akhmatova, E. V. Sorokina, I. Z. IShubina, E. A. Kurbatova, V. Stolpnikova, E. Kalinichenko, I. V. Bisheva, S. Skhodova","doi":"10.17650/1726-9784-2023-22-4-43-51","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-4-43-51","url":null,"abstract":"Background. Experimental animal models of psoriasis helped to clarify the functions of inflammatory mediators, to reveal the contribution of innate or adaptive immune mechanisms, keratinocytes to the development and maintenance of inflammation in psoriasis.Aim. To study the subpopulation composition of immune cells of blood, skin, lymphoid organs and compare two methods of isolation of cells from the skin.Materials and methods. The study included 46 mice of the C57BL / 6 line, which were divided into 2 groups: experimental (n = 24) to reproduce a model of acute psoriasis-like dermatitis using imiquimod cream 5 % (62.5 mg / cm2 / day / mouse, 7 days) and control (n = 22). The severity of skin inflammation was assessed on a point scale. On the 7th day, the skin, spleen, lymph nodes, and thymus were examined. To isolate cells from the skin, the method of spontaneous migration and enzymatic dissociation using collagenase was used. The assessment of the subpopulation structure of mononuclear cells (MNCs) was carried out by flow cytometry using monoclonal antibodies against the corresponding antigens (CD3, CD4, CD5, CD8, MHC class II, TCRyδ, CD38, CD80, CD83, CD86, TLR2). Statistical processing was carried out using the winMDI 2.8 software package.Results. It has been shown that both methods of isolation of skin cells are applicable for immunophenotyping of γδ T-lymphocytes, CD86+, CD83+, CD83+CD86+ dendritic cells. A decrease in TLR2 expression on blood cells and an increase in lymph node and skin cells were revealed. There was a marked increase in the number of CD38+ in the lymph nodes, thymus, and an increase in γδ T-lymphocytes in the lymph nodes and blood. The infiltration of γδ T-lymphocytes, CD8+ is shown in the skin and CD38+ cells.Conclusion. Acute psoriasis-like inflammation of mice was accompanied by an increase in the number of γδ T cells in the blood, lymph nodes and skin. Infiltration of the skin by CD8+ and CD38+ cells was observed. Both methods of cell isolation – the method of spontaneous migration and the method of enzymatic dissociation proved to be applicable for further immunophenotyping.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139250377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diagnosis of myelodysplastic syndromes after cytotoxic therapy for acute myeloid leukemia in the era of molecular research, difficulties in risk stratification and choice of therapy: The first domestic case report and literature review","authors":"A. Shirin, A. Antipova, O. Baranova, A. M. Ibragimov","doi":"10.17650/1726-9784-2023-22-4-28-34","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-4-28-34","url":null,"abstract":"Diagnosis of secondary myeloid neoplasms (therapy-related myeloid neoplasms) associated with therapy of solid tumors, in most cases, is not associated with significant difficulties. The problem is the diagnosis of secondary myelodysplastic syndromes after the treatment of acute myeloid leukaemias. The complexity of early diagnosis of secondary myelodysplastic syndromes is due to the differentiation of this nosology and the early recurrence of previous acute myeloid leukemia and, as a result, the difficulties of prognosis and risk stratification for therapeutic management. The relevance of this problem is explained by the rare case reports. Making the diagnosis of secondary myelodysplastic syndrome, in our opinion, can be based on the absence of a connection of cancer cell clone with the first (previous) disease in a molecular study. In this publication, we describe the first domestic case report of myelodysplastic syndrome diagnosed after chemotherapy for acute myeloid leukemia, based on differences in cytomorphology, immunophenotyping and molecular research. we interpreted the prognosis as favorable and prescribed appropriate treatment.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139248151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gastric carcinoma and peritoneal mesothelioma – a rare case of synchronous cancer. Clinical observation","authors":"A. Abdullaev, N. A. Kozlov, I. Stilidi","doi":"10.17650/1726-9784-2023-22-2-34-40","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-2-34-40","url":null,"abstract":"Primary-multiple malignant neoplasms develop in about 9 % of cancer patients in the Russian Federation, while synchronous tumors are detected in a quarter of them, which dictates the need for a mandatory multidisciplinary approach to the choice of treatment. Localization of synchronous primary-multiple tumors in one anatomical zone requires a qualitative interpretation of instrumental diagnostic methods and morphological analysis after biopsy of each tumor. Along with this, there is a possibility of an erroneous opinion about the presence of different histological structures of the detected tumors and the data of visual assessment methods are interpreted in favor of a single disease.This paper presents a clinical observation of a rare combination of gastric adenocarcinoma and peritoneal mesothelioma. The case was discussed at a multidisciplinary consultation with the participation of a surgeon, a chemotherapist and a radiologist. Taking into account the clinical stage of gastric body cancer c T3N1M0, III stage, it was decided to conduct preoperative polychemotherapy at the first stage. Repeated diagnostic laparoscopy revealed no negative dynamics, multiple small dropouts in the peritoneum persisted. Subsequently, the operation was performed in the volume of gastrectomy, total parietal peritectomy and appendectomy without macroscopic signs of a residual tumor. It was decided to refrain from intra-abdominal chemoperfusion with hyperthermia due to the large volume of surgery and the previous 8 courses of polychemotherapy. Microscopic examination of the altered part of the stomach wall revealed residual adenocarcinoma (type according to Lauren – intestinal) with signs of therapeutic pathomorphosis G3 (according to Mandard), which had grown into the subserous layer and the fiber of the small omentum, with signs of perineural invasion, in the absence of vascular invasion; resection edges – R0. On the surface of the removed fragments of the peritoneum, various foci of malignant epithelioid mesothelioma were found. At the control examination a year later, according to computed tomography and esophagogastroduodenoscopy, there were no signs of progression, the patient’s condition was satisfactory.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83965880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The role of circulating tumor DNA in diagnosis and optimization of treatment of localized and local pancreatic cancer","authors":"A. Shabunin, V. Ptushkin, M. Tavobilov, K. Titov, Ju. N. Kobzev, A. A. Karpov, E. B. Kudryash","doi":"10.17650/1726-9784-2023-22-2-27-33","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-2-27-33","url":null,"abstract":"Pancreatic cancer (PC) is a malignant highly aggressive tumor that arises and grows under conditions of inflammation and tissue hypoxia. In PC, one of the key processes in progression is epithelial-mesenchymal transition, which leads to early dissemination and rapid realization of metastatic disease, which accounts for low overall survival rates. The tumor, by releasing a wide range of different molecules (circulating DNA, exosomes, proteins and lipids), allows to identify and use them as potential, diagnostic and prognostic biomarkers.This review introduces readers to the liquid biopsy technique. The main applications of the technique in patients with ductal adenocarcinoma of the pancreas are shown. Liquid biopsy is a modern diagnostic method of molecular oncology, the principle of which is to detect circulating tumor cells, DNA, exosomes in biological fluids. Publications evaluating the potential of the method to assess minimal residual disease, evaluate tumor response to systemic therapy, and determine prognosis are discussed. Liquid biopsy is particularly relevant in cases of malignant tumors of difficult localization, in particular, PC. Modern methods of morphological verification of pancreatic tumors (fine needle biopsy under endosonographic control and percutaneous biopsy) have essential disadvantages: low information value, multiple repeated interventions, postmanipulative complications (pancreatitis, bleeding, etc.). Taking into consideration obvious advantages and perspectives of this method over traditional methods of morphological verification, liquid biopsy seems to be a promising diagnostic tool in personalized oncology for pancreatic cancer.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78673663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantitative ratio of mRNA expression of IGF/INS system receptors in multiple myeloma","authors":"S. Shushanov, Yu. B. Chernykh, T. A. Zakharova, N. Akentieva","doi":"10.17650/1726-9784-2023-22-2-41-52","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-2-41-52","url":null,"abstract":"Background. Individuals with increased expression of components of the IGF/INS system, are more likely to develop various malignancies. And in the case when the components of the IGF/INS system are overexpressed in tumors, this adversely affects the prognosis of the disease, including leading to a decrease in relapse-free survival. A characteristic feature of the IGF/INS system is the ability of the same ligands to bind to different receptors and vice versa (cross interactions) and activate different signaling pathways in the cell. This feature of the system requires an integrated approach to the study of the expression of its components, namely, the study of the quantitative ratio of the expression of individual components. The result obtained will make it possible to determine possible combinations of ligand-receptor bonds and, ultimately, will have both prognostic and evaluative value: in terms of a therapeutic target.Aim. To establish the quantitative ratio of mRNA expression of the IGF/INS system receptors: IR-A, IR-B, IGF-1R, and IGF-2R in the IM9 lymphoblastoid cell line and in three myeloma cell lines: RPMI1640, RPMI8226, H929, and to identify frequency of expression of these receptors in the mononuclear fraction of bone marrow aspirates obtained from treated patients with multiple myeloma.Materials and methods. We used human lymphoblastoid cells and 3 types of human myeloma cells, differing in the degree of differentiation and, as well as bone marrow aspirates obtained from 19 treated patients with stage III multiple myeloma. Expression of mRNA in cells was studied by quantitative real-time reverse transcription polymerase chain reaction and in bone marrow aspirate samples by semi-quantitative reverse transcription polymerase chain reaction.Results. During the study, we found that within each cell line, the receptor IR-A is predominant compared to the receptor IR-B. Patients with MM have a high frequency of IR-A expression compared to IR-B. The minimum ratio of IGF-1R:IR-A and IGF-1R:IR-B mRNA is in IM9 lymphoblastoid cells, and for myeloma cells these ratios are high. The ratio of IGF-2R:IR-A is maximum for IM9 lymphoblastoid cells, and for myeloma cells this ratio is three or more times less.Conclusion. Based on the study of the quantitative ratio of receptor mRNA, we state that in myeloma cells there is a high probability of the presence of IGF-1R/IGF-1R and IR-A/IR-A homodimers, and an IGF-1R/IR-A heterodimer. These data have both prognostic and evaluative value, since these combinations of receptors suggest a significant increase in the mitogenic effect due to activation by three ligands: IGF-1, IGF-2 and INS, which is an unfavorable factor, especially when a patient with multiple myeloma with concomitant Diabetes mellitus was prescribed insulin therapy along with chemotherapy. Based on our findings, we recommend simultaneously inhibiting both the IGF-1R receptor and the IR-A receptor as a therapeutic target.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87936484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Expression of β2 microglobulin on malignant multiple myeloma plasma cells","authors":"N. Tupitsyn, E. E. Tolstykh","doi":"10.17650/1726-9784-2023-22-2-60-64","DOIUrl":"https://doi.org/10.17650/1726-9784-2023-22-2-60-64","url":null,"abstract":"Background. β2‑microglobulin is a low molecular weight glycoprotein that is part of the major histocompatibility complex. The concentration of β2‑microglobulin in the blood serum of patients increases with various oncohematological pathologies, including multiple myeloma. One of the methods for detecting membrane β2‑microglobulin is flow cytometry. This article discusses the expression of β2‑microglobulin and key markers on the membrane of malignant cells in patients with multiple myeloma at the onset of the disease.Aim. To study the expression of β2‑microglobulin and markers CD45, CD56 and CD19 on the membrane of tumor plasma cells in the primary diagnosis of multiple myeloma.Materials and methods. The study of β2‑microglobulin and CD45, CD56 and CD19 was carried out in 37 patients with multiple myeloma by 8‑color flow cytometry using a panel of monoclonal antibodies for the diagnosis of plasma cell tumors (EuroFlow, 2012).Results. The expression of β2‑microglobulin in combination with markers CD45, CD56 and CD19 on tumor plasma cells was assessed, illustrations of the expression of these markers are presented. Out of 37 patients with multiple myeloma, hyperexpression of β2‑microglobulin was noted in 23 (62.2 %), in other cases there were normal or reduced levels of this protein in other cases.Conclusion. Tumor plasma cells overexpress β2‑microglobulin in a significant percentage of cases (62.2 %). This allows further assessment of the clinical significance of such aberrant expression and its relationship with serum levels of β2‑microglobulin.","PeriodicalId":21505,"journal":{"name":"Russian Journal of Biotherapy","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90469244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}