Background: Numerous studies of tissues' regeneration have confessed the recovery of damaged liver by hematopoietic stem cells. The cells act not only by cell replacement in the target organ but also by delivering trophic factors that support endogenous liver regeneration. A little is known of how organ-derived signals recruit such committed cells into circulation. Objective: We investigated the roles of noninvasive mechanical percutaneous stress of cirrhotic human liver in numbers fluctuation of trophic, liver-specific alpha-fetoprotein-positive fraction of CD133-positive hematopoietic stem cells in lymphocytes of patients waiting for liver transplantation. Methods: To promote in blood the number of the alpha-fetoprotein-positive fraction of CD133-positive hematopoietic stem cells, committed to liver' tissue, we activated mechanically the cirrhotic liver of patient by transcutaneous micro vibration received from skin-contacted electromagnetic vibraphones generated mechanical pulses with amplitude 10 µm and smoothly changing frequency from 0.03 kHz to 18 kHz and back forth during one cycle duration 1 minute. The number of the alpha-fetoprotein-positive fraction of CD133-positive hematopoietic stem cells in lymphocytes of potential recipients was controlled by flow cytometry before and during daily sonication of skin area, which corresponds to liver projection on it. The 15 minutes cyclic sonication of the liver area performed daily for three weeks. Results: The sonication increased significantly averaged number of liver-specific alpha-fetoprotein-positive How to cite this paper: Shoutko, A.N., Gerasimova, O.A., Fedorov, V.A. and Zherebtsov, F.K. (2019) Non-Invasive Vibration-Stress of the Cirrhotic Liver of Patients Waiting for Transplantation Induces of Circulating CD133+ Stem Lymphocytes Committed Phenotypically toward the Liver.
Mast cells cyclically synthesize and excrete a wide range of biogenesis products with different biological activities into the extracellular matrix and are regulators of local homeostasis both in normal conditions and in pathology – inflammation, oncogenesis, etc. The relative specificity of classical histochemical methods for detecting mast cells in relation to chromogenic to substrates causes certain difficulties in the selective study of the components of the secretome of mast cells, for example, heparin, histamine, chymase or tryptase. Therefore, immunomorphological techniques have become very popular, which identify specific substrates and allow differentiation of the components of the mast cell secretome. Mediators produced by mast cells promote neoangiogenesis, fibrillogenesis and re-epithelialization during the repair process.The aim of our work was to study the tryptase profile of the mast cell population of rat skin during the wound processusing an original combined method of immunohistochemical staining.Material and methods. The experiment involved 12 Wistar rats divided into two groups – intact (n=6) and with the existing wound process of the skin in the withers (n=6). The tryptase profile of mast cells was assessed on the 7th day of the wound process in comparison with the control group.Results. The results obtained showed a significant increase in the number of tryptase-positive mast cells on the 7th day of the wound process in the skin against the background of a general increase in the population of mast cells. Intragranular tryptase reserve was significantly increased. In contrast to the control, where mast cells with single tryptase-positive granules dominated, during the wound process, cells of this type were practically not detected in the skin (43.69±2.9% and 8.55±0.9%). The content of tryptase-positive mast cells with complete filling of the cytoplasm in the control group and the group of animals with a wound process was 14.24±1.2% and 38.03±2.9%, respectively.Conclusion. Thus, when modeling a wound, an increase in tryptase synthesis is detected both in individual MCs and within the entire MC population. This fact indicates that mast cell proteases can become a potential therapeutic target for improving wound regeneration by correcting immunogenesis, inflammation and fiber formation.
Российский научный центр радиологии и хирургических технологий Минздрава РФ, Санкт-Петербург, Российская Федерация Соотношения субпопуляционного состава мононуклеарных клеток крови у 68 пациентов исследованы методом проточной цитометрии до и в течение первого месяца после трансплантации трупной печени с целью определения их возможного вклада в процессы приживления трансплантата. Полученные данные позволяют рассматривать изменения регуляторных Т-клеток после трансплантации как час-тный случай генерализованного смещения всего дифференцировочного процесса в лимфоцитопоэзе, начиная со стволовых гемопоэтических клеток и прелимфоцитов. Смещение сопровождается увели-чением юных гематопоэтических стволовых клеток, клеток предшественников лимфоцитарного ряда, клеток с ангиогенными свойствами и уменьшением большинства более зрелых дифференцирован-ных форм лимфоцитов. Ослабление «толерогенной» активности печени у больных в листе ожидания трансплантации печени и восстановление ее после трансплантации объяснено морфообразующим, трофическим механизмом. Основу этого механизма составляет увеличение в крови стволовых гемо-поэтических клеток и ангиогенных клеток, переносящих регенераторную информацию к трансплан-тату.Ключевые слова: трансплантация печени, лимфоциты, стволовые клетки, кинетика, дифференцировка клеток, морфогенез. FEATURES OF SUBPOPULATION COMPOSITION OF BLOOD LYMPHOCYTES IN RECIPIENTS WITHIN THE FIRST MONTH AFTER LIVER TRANSPLANTATION A.N. Shoutko, O.A. Gerasimova, L.P. Ekimova, F.K. Zherebtsov, A.M. Granov Russian Scientifi c Center for Radiology and Surgical Technologies of the Ministry of Healthcare of the Russian Federation, St-Petersburg, Russian FederationRatios of subpopulations of mononuclear blood cells in 68 patients were registered by method of fl ow cytometry during one month before or after transplantation of a cadaveric liver with the aim of a comparative assessment of the contribution of cellular factors into graft acceptance. Results. The obtained data allow considering the changes of separate Treg subpopulation after transplantation as a partial outcome of generalized shift of the whole process of lymphocytes differentiation, involving hematopoietic stem cells and prelymphocytes. This shift is followed by an increase of young hematopoietic stem cells, precursors of lymphocytes, angiogenic cells, and by a concomitant reduction of the majority of more matured subpopulations of lymphocytes. Conclusion. Diminishment of «tolerogenic» liver activity of before transplantation and its restoration after the organ's replacement is explained by morphogenic/trophic mechanism. The basis of this mechanism is an increase in blood of hematopoietic stem cells and other cells transferring angiogenic and regenerative information to the graft.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.