Influence mesenchymal stem cells on aneuploidy of the tumor cells of Lewis lung carcinoma

Author(s):  
Tetiana Nikolaienko ◽  
Liudmyla Garmanchuk ◽  
Olena Dzhus ◽  
Larisa Kladnytska
Author(s):  
М.В. Филимонова ◽  
В.В. Южаков ◽  
А.С. Филимонов ◽  
В.М. Макарчук ◽  
Л.Н. Бандурко ◽  
...  

Цель исследования - изучение механизмов противоопухолевой активности ингибитора NOS Т1023 и оценка перспективности его дальнейшей разработки. Методика. В качестве опухолевой модели использована эпидермоидная КЛЛ, штамм которой получен из банка опухолевых материалов ФГБУ РОНЦ им. Н.Н. Блохина и поддерживался на самцах мышей C57BL6j. КЛЛ трансплантировали самцам мышей F1 (CBA´C57BL6j) путем подкожного введения 1,5×106 клеток карциномы в 0,1 мл суспензии на основе среды 199 в область латеральной поверхности правого бедра. Для сравнительной оценки противоопухолевой эффективности использовали ингибитор NOS под шифром Т1023, синтезированный в лаборатории радиационной фармакологии МРНЦ им. А.Ф. Цыба, и VEGF-ингибитор бевацизумаб (БВЗ). Животным первой опытной группы ежедневно, со 2 по 20 сутки вводили соединение Т1023 (60 мг/кг, в/б); второй опытной группы - трижды, на 2, 5 и 10 сут вводили БВЗ (12 мг/кг, в/б); третьей опытной группы - по этим схемам и в таких же дозах вводили и Т1023, и БВЗ (при комбинированном применении Т1023 вводили через 4 ч после введения БВЗ). Контрольным животным в качестве плацебо со 2 по 20 сутки вводили 0,9% раствор натрия хлорида (0,2 мл, в/б). Противоопухолевые эффекты оценивали, сравнивая размеры опухолевых узлов, длительность задержки роста и индекс торможения роста опухоли у контрольных и опытных животных. Гистологические методы исследования включали иммуноокрашивание на PCNA, CD31, пимонидазол и морфометрический анализ микроскопических изображений. Результаты сравнительных исследований показали, что соединение Т1023 и VEGF-ингибитор бевацизумаб (БВЗ) оказывают однонаправленное влияние на карциному легких Льюис (КЛЛ), сопровождающееся торможением роста и подавлением метастазирования неоплазии. Воздействие и Т1023, и БВЗ вызывало снижение содержания сосудов в перитуморальных зонах и в «горячих точках» ангиогенеза, усиливало гипоксию паренхимы КЛЛ и стимулировало апоптоз опухолевых клеток. При комбинированном применении Т1023 и БВЗ их антинеопластическая эффективность в отношении ингибирования ангиогенеза и девитализации опухолевых клеток соответствовала аддитивному действию. Заключение. Результаты позволяют предполагать, что основой противоопухолевой активности Т1023 является антиангиогенное действие и свидетельствуют о перспективности применения ингибиторов NOS в ангиостатической терапии солидных злокачественных новообразований в сочетании с имеющимися антинеоваскулярными средствами. The aim. Study of mechanisms of NOS inhibitor T1023 antitumor activity and estimation of its prospects for further development. Methods. Epidermoid Lewis lung carcinoma (LLC) from N.N. Blokhin NMRCO bank of tumor materials was used as a tumor model. Maintenance of tumor cell culture was provided by intramuscular injection of tumor cells suspension to C57BL6j mice every 14 days. Then LLC cells were transplanted to male F1 mice (CBA´C57BL6j) by subcutaneous injection of 1,5×106 cells in 0,1 ml of 199 medium into the lateral surface of the right hip. Comparative studies of antitumor efficacy were carried out using NOS inhibitor T1023, synthesized in the laboratory of radiation pharmacology of A.F. Tsyb MRRC, and VEGF inhibitor Bevacizumab (BVZ). Mice from the first experimental group were injected intraperitoneally (ip) with compound T1023 at dose 60 mg / kg from day 2 to 20; animals from the second experimental group were treated with BVZ at dose 12 mg / kg ip at days 2, 5 and 10; the third experimental group received T1023 in combination with BVZ according to these schemes and at the same doses (T1023 was administered 4 hours after administration of BVZ). Mice from the control group received 0,9% sodium chloride solution (0,2 ml, ip) as a placebo daily from 2 to 20 days. Antitumor effects were assessed by comparing the tumor size, duration of tumor growth delay and the index of tumor growth inhibition in control and experimental groups. Histological examination methods included immunostaining on PCNA, CD31, pimonidazole and morphometric analysis of microscopic images. Results. Comparative studies have shown that compound T1023 and VEGF inhibitor Bevacizumab (BVZ) have unidirectional effects on Lewis lung carcinoma (LLC), accompanied by growth inhibition and suppression of metastasis of neoplasia. The effect of both T1023 and BVZ caused a decrease in vascular content in the peritumoral zones and in the “hot spots” of angiogenesis, increased the hypoxia in the LLC parenchyma, and stimulated apoptosis of tumor cells. The combined use of T1023 and BVZ, caused the antineoplastic efficacy against inhibition of angiogenesis and devitalization of tumor cells which was estimated as additive effect. Conclusion. The results suggest that the basis of antitumor activity of T1023 is the anti-angiogenic effect and indicate the prospects of using NOS inhibitors in the angiostatic therapy of solid malignant neoplasms in combination with available anti-neovascular agents.


1998 ◽  
Vol 16 (7) ◽  
pp. 623-632 ◽  
Author(s):  
Dan Popovic ◽  
Khaled M El-Shami ◽  
Ezra Vadai ◽  
Michael Feldman ◽  
Esther Tzehoval ◽  
...  

1999 ◽  
Vol 142 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Hayao Nakanishi ◽  
Kiyoshi Kobayashi ◽  
Tuyoshi Nishimura ◽  
Kenichi Inada ◽  
Tetsuya Tsukamoto ◽  
...  

Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 2862-2862
Author(s):  
Shashank Jain ◽  
Susan Russell ◽  
Jerry Ware

Abstract A key receptor supporting the normal role of platelets in hemostasis and thrombosis is the collagen receptor, glycoprotein (GP)VI. GPVI is a member of the immunoglobulin super family and is uniquely expressed on the surface of platelets where it is assembled with the ITAM-bearing activation subunit, FcR-g. We have previously reported the generation of a murine model of GP VI deficiency that revealed profound defects in collagen-induced platelet aggregation and major defects in platelet activation following adhesion under flow to fibrillar collagen. More recently, we have generated congenic GPVI deficient animals through an extensive breeding scheme to the inbred C57BL/6J strain. The relevance of specific platelet receptors in experimental metastasis is emerging with work from our laboratory establishing a key role for the platelet glycoprotein Ib- IX complex. We have now performed similar studies using congenic GPVI deficient animals. In this experimental model, murine tumor cells are placed in the tail vein of mice and establishment of lung tumor burden or lung tumor foci is examined two weeks following injection. This model represents a syngeneic model where animals are fully immunocompetent and the injected tumor cells were originally derived from animals of the C57BL/6J strain. Experiments comparing B16F10.1 cells (murine melanoma) and D121 cells (murine Lewis lung carcinoma) have been performed revealing a consistent and statistically significant reduction in tumor foci as a consequence of GPVI absence. In the case of melanoma cell injections into wild type C57BL/6J mice, a mean of 270 foci (SEM 44.0, n=6) is reduced to a mean of 134 foci (SEM 11.6, n=7) in the absence of platelet GPVI (p = 0.013). Similar reductions were observed using Lewis lung carcinoma cells with wild type animals revealing a mean of 132 surface foci (SEM 13.4, n=15) and GPVI deficient animals having a mean of 69 foci (SEM 7.9, n=12; p = 0.0003). Using either cell line an approximate reduction of 50% in the number of visible tumor foci was observed. Additional studies have been performed to compare the size and growth rate of subcutaneously implanted tumor cells, i.e., primary tumor growth. Here, we observed no noticeable size difference in primary tumors harvested 17 days following subcutaneous injection of D121 cells comparing the presence or absence of platelet GPVI. These results demonstrate in the platelet GPVI facilitates experimental tumor metastasis but does not contribute in the growth of primary tumors. These studies underscore the well-established paradigm of platelet adhesion and activation in hemostasis and thrombosis being applicable to mechanisms participating in the spread of cancer. The importance of metastasis in the prognosis for recovery from cancer can not be under emphasized. Indeed, the spread of metastatic disease represents a fundamental change in significantly shortening the life span of the cancer patient. Thus, understanding the molecules that regulate metastasis identifies potential targets for therapeutic intervention that could significantly improve the patient’s prognosis.


Neoplasia ◽  
2005 ◽  
Vol 7 (3) ◽  
pp. 234-240 ◽  
Author(s):  
Vivek R. Shinde Patil ◽  
Erik B. Friedrich ◽  
Allison E. Wolley ◽  
Robert E. Gerszten ◽  
Jennifer R. Allport ◽  
...  

Medicina ◽  
2009 ◽  
Vol 45 (6) ◽  
pp. 480 ◽  
Author(s):  
Dalia Akramienė ◽  
Gražina Graželienė ◽  
Janina Didžiapetrienė ◽  
Egidijus Kėvelaitis

Objective. During the photodynamic treatment, complement system is activated and tumor cells are opsonized with iC3b fragment. β-glucans can enhance cytotoxicity of iC3bopsonized cells due to their specific interaction with complement receptor 3 (CR3; CD11b/CD18) on the surface of the effector cells. In contrast to microorganisms, tumor cells lack β-glucan as a surface component and cannot trigger complement receptor 3-dependent cellular cytotoxicity and initiate tumor-killing activity. This mechanism could be induced in the presence of β-glucans. This study aimed at determining the influence of coadministration of β-glucan from barley on the efficacy of photodynamic tumor therapy (PDT). Material and methods. C57 Bl/6 female mice bearing Lewis lung carcinoma were used throughout the study. Mice were randomized into groups (15 in each group) and exposed to the treatment with intravenous Photofrin injection (dose, 10 mg/kg) and after 24 h following laser illumination, or with oral administration of β-glucan from barley at a dose of 400 μg/mouse per day up to 5 days, or with their combination. Tumor growth dynamics and survival of the treated and untreated mice were monitored. Results. Tumor volume in all treated groups was significantly lower (P<0.001) than that in the control group. The most effective tumor growth suppression (P=0.033) was achieved in mice treated with combination of PDT and β-glucan from barley as compared with PDT alone. The best survival was achieved in the same group, but difference was not significant as compared to the control group (P=0.143) and to PDT alone group (P=0.319). Conclusions. The present study demonstrates that coadministration of β-glucan from barley can enhance efficacy of photodynamic therapy.


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