Эффекты Комбинированного Воздействия Низкоинтенсивного Электромагнитного Излучения Миллиметрового Диапазона И Комплексов Незаменимых Аминокислот У Крыс-Опухоленосителей Старческого Возраста

Purpose of the study. An analysis of morphological features of the lung sarcoma 45 ectopic growth in rats of different sexes in course of experimental therapy with 1,3‑diethylbenzimidazolium triiodide.Materials and methods. Studies were carried out on 60 white nonlinear female and male rats weighing 180–220 g with transfusion of sarcoma cells 45 suspension from the subclavian vein into the lung, which resulted in subsequent ectopic tumor growth. At the same time, per os, 0.5 ml of an aqueous solution of 1,3‑diethylbenzimidazolium triiodide in a single dose of 0.4 mg/kg was administered. Morphological control of the lung tumor growth was carried out in stages, weeks 1 through 8, while assessing visual changes with Axiovert microscope (Carl 44 Zeiss, Germany) as well as with Axiovision 4 image visualization program (Carl Zeiss, Germany).Results. It was found out that, instead of the initial acute phase of blood flow reduction due to introduction of tumor cells resulting in neoplastic growth, activation of the immunity cellular link occurred under the influence of 1,3‑diethylbenzimidazolium triiodide along with a compensatory increase in bronchoalveolar structures, regression of tumor nodes and proliferation of connective tissue. At the same time, in females, a more rapid restructuring of the protective cellular systems of the lung occurs, and tumor regression is observed.Conclusion. The morphological manifestations of triiodide indicate the antitumor effect of 1,3‑diethylbenzimidazolium on the possibility of inhibiting lung sarcoma 45 ectopic growth and demonstrate a high reactivity of female rats to the damaging effect of the tumor and the rate of disturbed pulmonary structures compensation.

Morphological signs of the prophylactic effect of 1,3-diethylbenzimidazolium triiodide on the ectopic growth of sarcoma 45 in the lung

Шихлярова¹,

Trepitaki²,

Frantsiyants³

et al. 2022

Influence of copper nanoparticles on the growth characteristics of tumors in white outbreed rats

Качесова¹,

Goroshinskaya²,

Zhukova³

et al. 2022

Purpose of the study. To study the effect of copper nanoparticles on the characteristics of the transplanted tumors of rats, as well as to assess the dependence of the effect on the method of administration of nanoparticles.Materials and methods. In experiments on 163 white outbred male rats, 160–200 g, the size and growth rate of transplanted sarcoma 45 and Pliss' lymphosarcoma were determined in dynamics when a suspension of copper nanoparticles in physiological saline was injected intratumorally or intraperitoneally in a total dose of 10 mg/kg. Nanoparticles had a "core-shell" structure with variable diameter in the range of 30–75 nm. Contrary to other researches, we started the exposure to metal nanoparticles only when the tumors had become visible and had grown up to the sizes at which their spontaneous regression was unlikely.Results. In most animals (up to 89 %), significant antitumor effects of copper nanoparticles were obtained up to complete regression of tumors with large volumes. The effects of nanodispersed copper differed in tumors with different histological structures and growth patterns. Experiments on a transplantable, slowly growing sarcoma 45 showed a decrease in the specific tumor growth rate after a single injection of nanoparticles (1.25 mg/kg), a decrease in tumor size could be observed after 4 injections (a total dose of 5 mg/kg). In the case of a rapidly growing tumor model (Pliss' lymphosarcoma), a decrease in tumor growth rates caused by copper nanoparticles occurred at later stages of exposure, after the animals received nanoparticles at a total dose of 5–10 mg/kg. The efficiency depended on the approach of nanoparticles injection.Conclusion. In case of sarcoma 45, intraperitoneal injection of copper nanoparticles was more effective than intratumoral one, while in rats with Pliss' lymphosarcoma intratumoral injection of the nanoparticles had some advantages. The results indicate that nanodispersed copper is a promising antitumor factor. The mechanisms of regression of large transplanted tumors under the influence of copper nanoparticles are discussed.

Features of the course of non‑small cell lung cancer and the percentage of lymphocytes in the blood of patients who had recovered from COVID‑19

Zhukova,

Frantsiyants,

Kharagezov

et al. 2024

Purpose of the study. This study aimed to identify the characteristics of the course of cell lung cancer (LC) and the information content of the indicators of the adaptation status of patients of different sexes who had COVID‑19, confirmed by PCR diagnostic results before the start of antitumor treatment. Patients and methods. We have studied traditional clinical and laboratory parameters, and the white blood cell count in patients with non‑small cell LC st. I–III, men (59) and women (32) aged 36–75 years. The main groups included 32 men and 16 women who had COVID‑19, confirmed by real‑time PCR, 2–9 months before hospitalization. Patients in the control groups denied having a history of diagnosed COVID‑19. Before the start of antitumor treatment, the percentage of lymphocytes in the blood was assessed. Cases of LC progression and mortality within a year after antitumor treatment were noted. Results. In men of the main group a 2.7‑fold increase (p < 0.05) in cases of early lung cancer stagings with a simultaneous tendency towards an increase in the number of incidences of metastasizing and mortality within a year after inpatient treatment in comparison with control indexes were observed. Signs of disease severity worsening and a decrease in the effectiveness of treatment were observed without significant changes in the ratio of the patients with tumors of various stagings in female patients. In patients of the main groups, a disturbance of the correspondence between the percentage of lymphocytes and the prevalence and dynamics of the malignant process was noted. In men of the main group who died within the first year after the end of antitumor treatment, the percentage of lymphocytes before the start of treatment reached 28–45 %, corresponding to antistress adaptational reactions, 4 times more often than in the control group (p < 0.01) Conclusion. COVID‑19 flow before the start of LC treatment contributes to a decrease in the body's antitumor resistance and a violation of the informativeness of the percentage of blood lymphocytes as an indicator of adaptation status. Changes depend on sex. In women, the observed changes reflected an aggravation of the malignant process and systemic disorders, as well as a decrease in the effectiveness of treatment. In men, a sharp increase in the number of cases of one year mortality with high percentage of blood lymphocytes before the start of treatment, as well as the number of cases of early‑ stage LC, indicates a more significant change in the state of lymphocytes compared to that observed only in LC, as well as the possibility of acceleration of the transition of precancerous cells into malignant process in the lungs under the influence of a previous coronavirus infection.