Simultaneous stimulation of growth of malignant tumors with epithelioid and sarcomatous nature in experiment.

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. e23517-e23517
Author(s):  
Irina V. Kaplieva ◽  
Elena M. Frantsiyants ◽  
Lidia K. Trepitaki ◽  
Ekaterina I. Surikova ◽  
Valeria A. Bandovkina ◽  
...  
Keyword(s):  
Nude Mice ◽  
Saline Solution ◽  
Structural Information ◽  
Malignant Tumors ◽  
Morphological Structure ◽  
Main Group ◽  
Melanoma Metastasis ◽  
Sarcoma 45 ◽  
Subcutaneous Inoculation ◽  
Stimulation Of

e23517 Background: The relevance of studying multiple primary malignant tumors (MPMTs) is determined by poor understanding of their pathogenesis. Our purpose was to create an experimental model of synchronous MPMTs with the stimulation of malignant growth of tumors with different histostructure. Methods: The study included 20 male BALB/c Nude mice. The main group included mice with simultaneous subcutaneous inoculation of tumors: murine B16/F10 melanoma (0.5 ml of suspension diluted 1:20 in saline solution) below the left scapula and rat sarcoma 45 (0.5 million tumor cells in 0.5 ml of saline solution) below the right scapula. Control groups included males with melanoma or sarcoma inoculated at the same dosage and volume as in the main group. Results: In the model of synchronous MPMTs, tumors appeared faster than in controls: melanoma–by 3 times, sarcoma–by 2 times; their volume was larger: melanoma–by 2.2 times, sarcoma–by 3.2 times. Melanoma metastasized, in addition to typical sites (the lungs, spleen, liver), into sarcoma 45 to the side adjacent to the chest, under the tumor node. The survival of mice with MPMTs was lower. The morphological structure of melanoma metastasis into sarcoma 45 was represented by large lamellar-rounded epithelium-like cells of melanosarcoma type with transparent cytoplasm and nuclei with a high frequency of pathological mitosis figures. Bundles of elongated spindle-shaped melanocytes with processes of the cytoplasm were determined in some melanoma areas, as well as alveolar and concentric structures. Conclusions: Synchronous subcutaneous inoculation of murine B16/F10 melanoma and rat sarcoma 45 to male BALB/c Nude mice increases their malignant potential due to an exchange of “structural information"; as a result, sarcoma acquires impulses of proliferative activity of melanoma, which, in turn, adapts and “mimics” a tumor into which it is going to metastasize.

Suppression of tumor development by another tumor in primary immunodeficiency in experiment.

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. e21583-e21583
Author(s):  
Ekaterina I. Surikova ◽  
Elena M. Frantsiyants ◽  
Irina V. Kaplieva ◽  
Valeria A. Bandovkina ◽  
Lidia K. Trepitaki ◽  
...  
Keyword(s):  
Nude Mice ◽  
Saline Solution ◽  
Malignant Tumors ◽  
Main Group ◽  
Small Island ◽  
Small Lesion ◽  
Guerin’S Carcinoma ◽  
The Right ◽  
Subcutaneous Inoculation ◽  
Left Scapula

e21583 Background: Multiple primary malignant tumors (MPMTs) are characterized by the presence of several primary neoplasms in one patient. The purpose of the study was to create an experimental model of MPMTs with one dominating tumor. Methods: The study included 21 female BALB/c Nude mice. The main group included mice with simultaneous subcutaneous inoculation of tumors: Guerin's carcinoma (0.5 million tumor cells in 0.5 ml of saline solution) under the right scapula and B16/F10 melanoma (0.5 ml of suspension diluted 1:20 in saline solution) under the left scapula. Control groups included females with melanoma or carcinoma inoculated at the same dosage and volume as in the main group. Results: In a MPMT model, tumors appeared 3 times faster than in controls and demonstrated larger volumes: melanoma – by 7.5 times, carcinoma – by 2.2 times; the survival of mice with MPMTs decreased. Carcinoma in a MPMT model metastasized to melanoma and almost completely suppressed its growth. Melanoma was represented by a small “island” of tumor tissue 3-4 mm in diameter and was located just under the skin at the site of injection of melanoma cells. The light part of the same loose pasty consistency as the dark part, with a diameter of 6-7 mm, was located around the dark “center” of melanoma. The rest part of the tumor located under the left scapula looked like an elongated grayish-pink node of a dense elastic consistency - just like the tumor located under the right scapula, which was much larger in volume. The right and left tumors did not merge with each other; there was a small distance of about 2-3 mm between them. A small lesion of caseous necrosis, 6–7 mm in diameter, was recorded in the center of the right tumor node of Guerin's carcinoma; there was no necrosis in the left tumor. Smaller size, the absence of necrosis and visually more “young” carcinoma tissue on the left indicated its later appearance than that on the right, which, in combination with the remnants of melanoma fused to the left tumor and the absence of “contact” between the left tumor and the right one, indicated the metastatic nature of Guerin’s carcinoma on the left. B16/F10 melanoma did not metastasize. Conclusions: In simultaneous subcutaneous inoculation of murine B16/F10 melanoma and rat Guerin’s carcinoma to female BALB/c Nude mice, carcinoma cells metastasized to melanoma and suppressed its growth.

Cyclooxygenase-2 inhibitors suppress the growth of gastric cancer xenografts via induction of apoptosis in nude mice

1998 ◽  
Vol 274 (6) ◽  
pp. G1061-G1067 ◽  
Author(s):  
Hitoshi Sawaoka ◽  
Sunao Kawano ◽  
Shingo Tsuji ◽  
Masahiko Tsujii ◽  
Edhi S. Gunawan ◽  
...  
Keyword(s):  
Gastric Cancer ◽  
Cancer Cells ◽  
Nude Mice ◽  
Tumor Volume ◽  
Malignant Tumors ◽  
Apoptotic Cell ◽  
Dependent Manner ◽  
Cox 2 ◽  
Induced Apoptosis ◽  
Cox 2 Inhibitors

To clarify the role of mitogen-inducible cyclooxygenase (COX-2) in the development of malignant tumors, we investigated the effects of COX-2 inhibitors on the growth of gastric cancer xenografts in nude mice in vivo. MKN45 gastric cancer cells (5 × 106cells/animal) that overexpress COX-2 were inoculated subcutaneously into athymic mice. NS-398, a specific COX-2 inhibitor, or indomethacin, a nonspecific COX-2 inhibitor, was administered orally to animals every day for 20 days. These drugs reduced the tumor volume significantly. Immunohistochemistry using bromodeoxyuridine, nick end labeling, and electron microscopy showed that NS-398 induced apoptosis in cancer cells in a dose-dependent manner and inhibited cancer cell replication slightly. Indomethacin also induced apoptosis and suppressed replication of tumor cells. There was a significant negative correlation between tumor volume and apoptotic cell number within the tumor. These results are consistent with the hypothesis that COX-2 inhibitors suppress growth of gastric cancer xenografts mainly by inducing apoptosis and suppressing replication of the neoplastic cells. It follows that COX-2 plays an important role in the development of gastric cancer.

scholarly journals Morphological alterations in the heart and aorta of rats treated with glucocorticoids

2015 ◽  
Vol 32 (04) ◽  
pp. 231-235
Author(s):  
R. Dantas ◽  
K. Souza ◽  
D. Santos ◽  
V. Feitosa ◽  
E. Fioretto ◽  
...  
Keyword(s):  
Wistar Rats ◽  
Histological Analysis ◽  
Saline Solution ◽  
Morphological Changes ◽  
Morphological Structure ◽  
Control Group ◽  
Morphological Alterations ◽  
Heart Chamber ◽  
Male Wistar Rats ◽  
Synthetic Glucocorticoid

Abstract Introduction: The objective of this study was to analyze the morphological structure of the heart and aorta of rats treated with the synthetic glucocorticoid dexamethasone. Material and Methods: Male Wistar rats were divided into two groups: 08 control rats undergoing treatment with a 0.9% saline solution for 10 days and 08 rats treated for 10 days with dexamethasone (2mg/kg animal weight). Results: Histological analysis detected a mild cardiac hypertrophy and 15% reduction of collagen located in the aorta of animals treated with glucocorticoid when compared to the control group. Conclusion: We conclude that treatment with dexamethasone for a period of 10 consecutive days is able to promote morphological changes in the structure of the heart chamber and, impair morphological structure of aorta.

STUDIES ON THE EFFECTS OF PHAGOCYTIC STIMULATION ON MICROBIAL DISEASE: V. STIMULATION OF PHAGOCYTIC ACTIVITY OF MONOCYTES AGAINST TUBERCLE BACILLI, STRAIN BCG

1956 ◽  
Vol 34 (1) ◽  
pp. 571-579
Author(s):  
Béla Gözsy ◽  
László Kátó
Keyword(s):  
Phagocytic Activity ◽  
Guinea Pigs ◽  
Saline Solution ◽  
Defense Mechanism ◽  
Direct Action ◽  
Intraperitoneal Administration ◽  
Cellular Defense ◽  
Appropriate Treatment ◽  
Stimulation Of

Monocytes were obtained by the washing of the peritoneal cavity of guinea pigs with Hanks' solution six days after intraperitoneal administration of a saline solution containing glycogen. Phagocytosis of tubercle bacilli (BCG strain) was studied after a one hour incubation at 37 °C. under the influence of histamine and 1,4-dimethyl-7-isopropyl-bicyclo-decapentane, which latter substance had shown a beneficial influence on the outcome of experimental tuberculosis. Histamine increased the phagocytic activity of monocytes, within the limits of 1 μgm. to 10 μgm per ml. This stimulation was inhibited in vitro by a synthetic antihistamine substance. Fifty and 100 μgm. per ml. histamine decreased the phagocytosis of tubercle bacilli (BCG) by the monocytes. Monocytes withdrawn from histamine treated guinea pigs showed no stimulated activity. From 0.5 to 100 μgm. per ml. of 1,4-dimethyl-7-isopropylbicyclo-decapentane stimulated the phagocytic activity of monocytes against tubercle bacilli (BCG) in vitro and monocytes withdrawn from animals treated with the same substance showed equally a stimulated activity. This increased phagocytosis was equally inhibited in vitro by the antihistamine, but to a lesser degree than the inhibition of the histamine stimulated phagocytosis. The above observations suggest that the stimulating action of the 1,4-dimethyl-7-isopropyl-bicyclo-decapentane is a direct action on the monocytes rather than an indirect one caused by activation of latent histamine. Experiments also show the possibility of stimulation of the cellular defense mechanism, by appropriate treatment.

Corpus cardiacum stimulated trehalose efflux from cockroach (Periplaneta americana) fat body: control by calcium

1985 ◽  
Vol 63 (1) ◽  
pp. 63-66 ◽  
Author(s):  
J. E. Steele ◽  
T. Paul
Keyword(s):  
Cyclic Amp ◽  
Periplaneta Americana ◽  
Saline Solution ◽  
Fat Body ◽  
Surrounding Medium ◽  
Physiological Saline ◽  
Corpus Cardiacum ◽  
Physiological Saline Solution ◽  
Stimulation Of

Cockroach fat body incubated in a simple physiological saline solution releases trehalose to the surrounding medium. The output of trehalose occurs in the absence of ambient Ca2+ and decreases slowly with time. In two separate experiments, 0.1 mM CaCl2 added to the saline increased the output of trehalose on average by 70% but higher concentrations of Ca2+ did not further increase the efflux of trehalose. Stimulation of trehalose efflux by corpus cardiacum extract is absolutely dependent on extracellular Ca2+, no increase occurring beyond the basal level in the absence of the ion. The activity of corpus cardiacum extract increases as the concentration of CaCl2 is increased to 0.5 mM. This concentration of Ca2+ in the saline permits the extract to increase trehalose efflux by as much as 60% above the basal level. Corpus cardiacum extract, as well as the hypertrehalocaemic agents cyclic AMP and theophylline, increase significantly the influx of Ca2+ into fat body in vitro. The basal efflux of trehalose from fat body and that stimulated by corpus cardiacum extract is not dependent on extracellular Mg2+.

Use of Cellular Technologу at Surgical Correction of Congenital Lower Limb Length Discrepancy in Children

2011 ◽  
Vol 18 (1) ◽  
pp. 3-9
Author(s):  
S P Mironov ◽  
Nikolay Petrovich Omel'yanenko ◽  
O V Kozhevnikov ◽  
V K Il'ina ◽  
A V Ivanov ◽  
...  
Keyword(s):  
Bone Marrow Cells ◽  
Limb Length Discrepancy ◽  
Main Group ◽  
Control Group ◽  
Duration Of Treatment ◽  
Length Discrepancy ◽  
First Results ◽  
Cellular Technology ◽  
Stimulation Of

First results of application of cultivated autologous stromal bone marrow cells for the stimulation of distraction bone regenerates' reparative regeneration in 8 patients aged from 3.7 to 16 years with congenital lower extremity length discrepancy (main group) are presented. In 24 children with similar pathology aged from 2.5 to 14 years (control group) no cellular technology was used. In the main group duration of treatment reduces to 4.5-6.5 months versus 7.5- 11 months in the control one. That enabled to avoid potential complications related to the long-term fixation of the extremity in the distraction apparatus.

scholarly journals COMBINATION OF PLATELET RICH PLASMA, LOWINTENSITY PULSED ULTRASOUND AND SILDENAFIL ORAL SPRAY IN TREATMENT OF ERECTILE DYSFUNCTION

2019 ◽  
pp. 42-49
Author(s):  
Yurii Zasieda
Keyword(s):  
Erectile Dysfunction ◽  
Growth Factors ◽  
Erectile Function ◽  
Platelet Rich Plasma ◽  
Treatment Protocol ◽  
Main Group ◽  
Control Group ◽  
Pulsed Ultrasound ◽  
Stimulation Of ◽  
Intracavernous Injections

Relevance. Some non-pharmacological methods, such as low-intensity pulsed ultrasound (LIPUS) proved to be effective in ED treatment due to stimulation of penile tissue regeneration and penile hemodynamics increase. The biological methods that utilize cellular growth factors such as platelet-rich plasma (PRP) therapy proved to be effective in stimulation of neovascularization processes and correction of endothelial dysfunction while ED treatment.Local negative pressure (LNP) therapy shall be considered as an auxiliary method to PRP and LIPUS due to its ability to slow down PRP outflow from injection zones. Sildenafil («Strondex») is perspective pharmacological addition to ED treatment protocol. Aim. Evaluation of the efficacy and safety of therapeutic model of combined application of PRP intracavernous injections, LNP, LIPUS and Sildenafil («Strondex») for vasculogenic (arterial and corporal veno-occlusive) ED treatment.Materials and methods. Prospective study was conducted in a group of 64 outpatients with diagnosis of erectile dysfunction of vascular genesis (ICD-10: N48.4) in Men’s Health Clinic (Kyiv, Ukraine). “International Index of Erectile Function-5” (IIEF-5), “Erectile Hardness Score” (EHS) were used as the tools for clinical assessment. Ultrasonic cavernous bodies scanning and pharmacodopplersonography were used for the data validation.Study results. Main group patients underwent treatment consisting of 6 sessions of PRP intracavernous injections and 12 sessions of local penile LIPUS combined with LNP and Sildenafil («Strondex») pharmacotherapy. Control group underwent 12 sessions of local penile LIPUS combined with LNP and the same pharmacotherapy. According to the IIEF-5 data obtained 12 weeks after the study the erectile function improvement was found in 27 patients of the main group and 20 patients of the control group. EHS improved by 1 point or more in 29 and 20 patients correspondingly.Conclusions. Treatment protocol specifying combination of PRP, LIPUS, LNP and Sildenafil («Strondex») is promising due to PRP-therapy augmentation by intracavernous ultrasonic activation of platelet growth factors, but the data obtained require further physiological validation and clinical placebo-controlled studies with involvement of larger groups of population.

scholarly journals Assessment of prognostic factors in extracranial germ cell tumors in children

2021 ◽  
Vol 67 (6) ◽  
pp. 829-836
Author(s):  
Symbat Salieva ◽  
Riza Boranbayeva ◽  
Bakhram Zhumadullayev ◽  
Ergali Sarsekbayev ◽  
Oleg Bydanov
Keyword(s):  
Overall Survival ◽  
Prognostic Factors ◽  
Survival Rate ◽  
Germ Cell ◽  
Malignant Tumors ◽  
Survival Rates ◽  
Tumor Resection ◽  
Germ Cell Tumors ◽  
Morphological Structure ◽  
High Sensitivity

Germ cell neoplasms in the group of benign and malignant tumors heterogeneous in morphological structure, clinical features and prognosis. A special characteristic of germ cell tumors is their high sensitivity to platinum-containing chemotherapy, which allows cure of up to 80–90% patients. However 20–25% of patients with a common type have overall survival rate of less than 50%. The aim of the study is to assess the survival rate of children with extracranial germ cell tumors and to identify adverse risk factors. Methods. The study includes 116 children with extracranial germ cell tumors treated from 2013 to September 2009. Treatment consisted of tumor resection and platinum based on platinum chemotherapy. Survival rate was assessed by the Kaplan-Mayer method. Prognostic factors are determined according to IGCCCG, MaGIC, MAKEI, RODO. Results. Overall and event free survival rates were 79±5% and 76±4%, respectively. The worst overall survival had patients with extragonadal tumors, advanced stages of a disease, high initial level of AFP (≥10 000 ng/ml), non-seminoma version of state treasury bills and extra pulmonary metastases. Conclusion. Survival rate in children with extracranial germ cell tumors depends on the prognostic factors. Statistically significant predictors of the poor prognosis were extragonadal localization of a tumor and the AFP level ≥10 000 ng/ml.

scholarly journals Right ventricular failure and pulmonary hypertension at recurrent thromboembolism of small branches of the pulmonary artery in cancer patients

2015 ◽  
Vol 96 (4) ◽  
pp. 492-497
Author(s):  
I A Kamalov ◽  
M G Tukhbatullin
Keyword(s):  
Heart Failure ◽  
Pulmonary Hypertension ◽  
Pulmonary Artery ◽  
Venous Thrombosis ◽  
Malignant Tumors ◽  
Vena Cava ◽  
Right Heart Failure ◽  
Main Group ◽  
Control Group ◽  
Right Heart

Aim. Develop new approaches to the diagnosis of right heart failure and pulmonary hypertension in recurrent thromboembolism of small branches of the pulmonary artery in patients with malignant tumors. Methods. 83 patients with malignant tumors of various localizations were examined and followed-up. The main group included 49 patients with malignant tumors of various localizations and related venous thrombosis. The control group included 34 patients who did not have venous thrombosis. Patients in both groups underwent ultrasonography of inferior vena cava system veins and echocardiography at intervals of 3-4 days during the diagnosis and treatment of malignant tumors. Right ventricle ejection fraction and systolic pressure in the pulmonary artery were calculated at echocardiography. Results. No signs of inferior vena cava system veins thromboses, right heart failure, pulmonary hypertension were identified in patients of the control group while setting up the diagnosis and treatment of malignancies. In 38 out of 49 patients of the main group, right ventricular failure and pulmonary hypertension of varying severity were detected. The condition of 46 patients of the main group gradually improved after treating with anticoagulants. Conclusion. Recanalization of venous thrombosis is accompanied by frequent rejection of micro thrombi and embolization of small branches of pulmonary artery, causing right heart failure and pulmonary hypertension, which can be promptly detected by repeated echocardiography.

scholarly journals Fetoplacental complex parameters’ changes during repeated increase of the blood volume in female rabbits

2020 ◽  
Vol 11 (6) ◽  
pp. 37-44
Author(s):  
Nataliya G. Pavlova ◽  
Anastasiya A. Yakovleva
Keyword(s):  
Blood Volume ◽  
Functional State ◽  
Saline Solution ◽  
Experimental Studies ◽  
Main Group ◽  
Placental Insufficiency ◽  
New Drugs ◽  
Control Group ◽  
Fetoplacental Complex ◽  
Preclinical Trials

One of the mandatory stages of introducing new drugs into obstetric practice is preclinical trials, the purpose of which is to study the effect of drugs on the development of fetuses and placentas. When conducting experimental studies, the main group of animals receiving the drug is compared with the control group of animals that do not receive drugs. At the same time, the volume of the test drug itself can significantly change the blood volume (BV) of an experimental animal, especially a small one, and such administration repeated repeatedly over several days can accumulate this effect, having an adverse effect on the functional state of the fetus. A model of chronic placental insufficiency created on the 18th day of pregnancy in female rabbits by ligating 1/3 of the preplacental vessels in one uterine horn was used to study the effect on the development of the brain and placenta of normally developed and retarded fetuses of multiple daily (1928 days of pregnancy) infusions of saline solution to females in a volume of 6% of the animals BV and comparable to the volume of medications used in the treatment of placental insufficiency in clinical practice (main group of rabbits). It was found that repeated daily administration of saline solution to a female rabbit in the second half of pregnancy, which is about 6% of the BV, causes a violation of the functional state of her normally developed and, to an even greater extent, retarded fetuses. This is manifested by a 1.4-fold reduced survival rate of fetuses in the intact horn of the uterus and a more pronounced violation of brain metabolism in fetuses of the intact and experimental horns compared to those of the control group of females.

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