Aim: In this study, we seek to check if recombinant spidroin rS1/9 is applicable for cell-engineering construct development. Novel technologies of cell and tissue engineering are relevant for chronic liver failure management. Liver regeneration may represent one of the possible treatment options if a cell-engineered construct (CEC) is used. Nowadays, one can see the continuous study of various matrices to create an appropriate CEC. Materials and Methods: We have adhered allogenic liver cells and multipotent mesenchymal bone marrow stem cells (MMSC BM) to a microgel with recombinant spidroin rS1/9. Then we have studied the developed implantable CEC in a rat model (n = 80) of chronic liver failure achieved by prolonged poisoning with carbon tetrachloride. Results: Our results demonstrate that the CECs change the values of biochemical tests and morphological parameters in chronic liver failure in rats. Conclusion: We consider there to be a positive effect from the microgel-based CECs with recombinant spidroin rS1/9 in the treatment of chronic liver failure.
ФГБУ «Федеральный научный центр трансплантологии и искусственных органов имени академика В.И. Шумакова» Минздрава России (директор-академик РАМН, проф. С.В. Готье), Москва, Российская Федерация 2 Кафедра трансплантологии и искусственных органов (зав.-академик РАМН, проф. С.В. Готье) ГБОУ ВПО Первый МГМУ им. И.М. Сеченова (ректор-член-корр. РАМН, проф. П.В. Глыбочко), Москва, Российская Федерация 3 ФГБУ НИИ общей патологии и патофизиологии РАМН (директор-академик РАМН, проф. А.А. Кубатиев), Москва, Российская Федерация Цель. Сравнить эффективность использования МСК (мезенхимальных стромальных клеток) различной онтогенетической зрелости (МСК костного мозга-МСК КМ и МСК пупочного канатика МСК ПК) на восстановительные процессы в поврежденной печени. Материалы и методы. В 4 группах опытов на крысах Вистар (n = 80) с моделью токсического фиброзирующего повреждения печени (ФПП) было изучено влияние МСК различной онтогенетической зрелости на процессы восстановительной регенерации: 1-я гр.контроль; 2-я и 3-я гр.введение МСК КМ в составе Сферо ® ГЕЛЬ-лонг в дозах 2,5 × 10 6 и 5,0 × 10 6 клеток соответственно; 4-я гр.введение МСК ПК в виде клеточных сфероидов (8-10 × 10 5 клеток). Клетки вводили в печень через 7 суток после окончания моделирования ФПП и изучали эффект клеточной терапии в течение 180 суток. Об эффективности корригирующей терапии судили по результатам функционального и морфологического состояния печени (гистологический контроль паренхимы и непаренхиматозных тканей). Результаты. МСК КМ в обоих дозах и МСК ПК способствовали более быстрой нормализации печеночных ферментов по сравнению с контролем (1-я гр.); однако различия в скорости восстановления нарушенных энзиматических функций печени между группами 2, 3 и 4 отсутствовали. Через 90 суток после применения клеток установлена более выраженная регенераторная активность используемых клеток в 3-й и 4-й группах; через 180 суток более выраженная активация восстановительных процессов отмечена в 3-й группе; в 4-й группе на этом сроке оказались более выраженными процессы склерозирования. Заключение. Для индукции восстановительных процессов в печени целесообразно использовать не МСК ПК, а МСК КМ в составе Сферо ® ГЕЛЬ, так как МСК КМ оказывают не только местное, но и системное иммунорегуляторное воздействие, увеличивая пул Т-регуляторных клеток, которые являются дополнительным переносчиком регенерационной информации в организме. Ключевые слова: хроническое фиброзирующее повреждение печени, мезенхимальные стромальные клетки.
Aim:to determine the clinical significance of vascular endothelial growth factors VEGF-A, VEGF-D, PlGF-1 to assess the risk of cardiovascular complications in heart recipients.Materials and methods.103 patients, aged 16 to 73 years, 85 males and 18 females. 65 recipients (47 men and 18 women) had dilated cardiomyopathy, 38 – coronary heart disease (CHD). The concentration of VEGF-A, VEGF-D, PlGF-1 was measured using xMAP technology with sets of reagents Simplex ProcartaPlex™.Results.After HTx the level of VEGF-A significantly decreased, p = 0.001. There were no correlations between the levels of VEGF-A, VEGF-D and PlGF-1 with age, gender and diagnosis. After HTx VEGF-A level was higher in recipients with ACR than in those without it (p = 0.001). ACR frequency was significantly higher in patients with high VEGF-A level (≥316.5 pg/ml, RR = 5.8 ± 0.5, AUC = 0.779). After HTx PlGF-1 level was higher in recipients with ACR too (p = 0.039). ACR frequency was significantly higher in patients with high PlGF-1 level (≥5.33 pg/ml, RR = 1.8 ± 0.5, AUC = 0.65). There were no correlations between VEGF-D level with ACR and all three biomarkers with AMR. ACR frequency was significantly higher with both high VEGF-A and PlGF-1 levels (RR = 6.4).Conclusion.Serum levels of VEGF-A and PlGF-1 after HTx may be regarded as indicators of increased risk of ACR.
Objective: to study the effectiveness of correcting the morphofunctional characteristics of the liver in an experimental model of chronic liver disease (CLD), using implanted cell-engineered constructs (CECs).Materials and methods. Experiments were carried out on male Wistar rats (n = 80) aged 6–8 months with an initial weight of 230–250 g. CLD was modeled by inoculating the rats with 60% CCl4 oil solution for 42 days based on a modified scheme. Microgel based on recombinant spidroin rS1/9 was used as a matrix for CECs fabrication. Allogeneic liver cells (LCs) and multipotent bone marrow-derived mesenchymal stem cells (BM-MSCs) from a healthy donor were used as the cellular component of the CECs. The effectiveness of the corrective effect of the implanted CECs was assessed in an experimental CLD model (n = 60) in two groups of rats: Group 1 (control, n = 20, 1 mL of saline solution was injected into the damaged liver parenchyma) and Group 2 (experimental, n = 40, CECs containing allogenic LCs and BM-MSCs in a 5 : 1 ratio in a volume of 1 mL were implanted into the damaged liver parenchyma). For long-term monitoring of the CEC state, the CECs were labeled by additional inclusion in Cytodex-3. The effectiveness of the regulatory effect of CECs on regenerative processes in the liver was evaluated using biochemical, morphological and morphometric techniques, as well as by flow cytometry at 90 days after implantation.Results. In the control group, the mortality rate in CLD was 25%. There was no death in the experimental group with CLD after CEC implantation. The CECs were found to have a corrective effect on the biochemical and morphological parameters of the liver in CLD during 90 days of follow-up, with concomitant preservation of structural cellular homeostasis in the implanted CECs. Conclusion. Implantation of CECs in the liver facilitates effective correction of CLD by activating regenerative processes in the damaged liver, which is due to long-term preservation of structural cellular homeostasis in the CECs.
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