The preclinical activity of lenalidomide in urothelial carcinoma (UC).

2012 ◽  
Vol 30 (15_suppl) ◽  
pp. e15002-e15002
Author(s):  
Jonathan M. Levitt ◽  
Keith S. Chan ◽  
Weiguo Jian ◽  
Seth P. Lerner ◽  
Guru Sonpavde

e15002 Background: Lenalidomide is approved for multiple myeloma and deletion 5q myelodysplastic syndromes (MDS) and demonstrates immune modulation, anti-angiogenic activity and direct anti-tumor cytotoxicity. A rationale can be made to evaluate the preclinical activity of lenalidomide in urothelial carcinoma (UC) based on the importance of these pathways. Methods: The in vitro anti-tumor activity of lenalidomide was evaluated in 4 human (5637, TCC-SUP, RT4, RT112) and 1 murine (MB49) cell line. Anti-proliferative activity activity (MTT assay), apoptosis (Annexin-FITC immunohistochemistry [IHC], flow cytometry) and cell viability by colony forming assay were measured. In vivo examination of activity of daily oral lenalidomide 10 mg/kg orally once daily or placebo for 4 weeks is examined in a syngeneic immunocompetent mouse model employing MB49-Luc25 cells injected subcutaneously in C57BL/6 mice. Murine tumors will be studied for anti-tumor activity. Results: In vitro activity of lenalidomide was detected at low ~1 µM concentrations (attainable in human subjects) against a non-invasive human UC cell line (RT4). Long-term cultures of RT4 cells for 10 days with daily repletion of lenalidomide reduced cell viability and colony forming ability to 75.6% of controls. Induction of apoptosis in RT4 was demonstrated by Annexin-FITC IHC and flow cytometry compared to control (30.11 vs. 14.74%). Invasive human UC cells and murine MB49 cells did not demonstrate apoptosis with lenalidomide exposure in vitro. Futher, lenalidomide did not inhibit overall tumor growth in the syngeneic immunocompetent murine model; immune activity and stem cell directed activity will be presented. Conclusions: Lenalidomide demonstrated preclinical anti-tumor activity against non-invasive human UC cells. Given its favorable toxicity profile compared to cytotoxic chemotherapy, clinical evaluation in patients with non-muscle-invasive bladder cancer and recurrence after BCG therapy may be warranted.

2013 ◽  
Vol 31 (6_suppl) ◽  
pp. 294-294
Author(s):  
Weiguo Jian ◽  
Jonathan M. Levitt ◽  
Keith S. Chan ◽  
Seth P. Lerner ◽  
Guru Sonpavde

294 Background: Lenalidomide (Len) is an immunomodulatory drug (IMiD) approved for hematologic conditions and demonstrates immune modulation, anti-angiogenic activity and direct anti-tumor cytotoxicity. A rationale can be made to evaluate the preclinical activity of Len in UC. Methods: The in vitro anti-tumor activity of Len was evaluated in 4 human (5637, TCC-SUP, RT4, RT112) and 1 murine (MB49) cell line. Anti-proliferative activity activity (MTT assay), apoptosis (Annexin-FITC immunohistochemistry [IHC], flow cytometry) and cell viability by colony forming assay were measured. In vivo activity of daily oral Len 10 mg/kg or placebo orally for 5 days a week for up to 4 weeks was examined in syngeneic immunocompetent C57BL/6 mice bearing subcutaneous (SC) MB49-Luc25 tumors and RT4 subcutaneous xenografts. Tumors underwent immunohistochemistry (IHC) for microvessel density (CD31), apoptosis (cleaved caspase [cc]-3) and CD3+/CD20+ lymphocyte infiltration. Cereblon, a molecular target of Len was analyzed by IHC. Results: In vitro cultures for 3 days with daily repletion of Len showed significant pro-apoptotic activity (flow cytometry) at low micromolar concentrations attainable in human subjects (2.2 µM) against RT4 cells, a superficially invasive human UC cell line. Long-term cultures of RT4 cells for 2 weeks with daily repletion of Len significantly reduced cell viability and colony forming ability. Cereblon expression was numerically lower in sensitive RT4 cells compared to resistant 5637 cells (p=NS). In the immunocompetent model in vivo, Len did not decrease tumor size, or increase cc-3 and CD3+/CD20+ lymphocytes, but post-Len tumors exhibited decreased CD31 (p<0.05). In RT4 xenografts, Len significantly decreased the size of tumors and CD31, and increased cc-3 (all p<0.05). Cereblon expression increased in Len treated RT4 xenografts (p=0.024). Conclusions: Lenalidomide demonstrated selective preclinical activity against superficially invasive low grade human UC cells attributable to direct tumor cell apoptosis and anti-angiogenic activity. Clinical evaluation in patients with low grade or non-invasive UC and further study of cereblon as a predictive biomarker may be warranted.


2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Tamires Rocha Falcão ◽  
Aurigena Antunes de Araújo ◽  
Luiz Alberto Lira Soares ◽  
Iuri Brilhante de Farias ◽  
Wliana Alves Viturino da Silva ◽  
...  

Background.Libidibia ferrea(L. ferrea)is found throughout the northeastern region of Brazil, where it has been used in folk medicine with beneficial effects on many inflammatory disorders.Purpose. This study investigated the phytochemical composition of the crude extract and fractions ofL. ferreafruit and evaluated its anti-inflammatory and antinociceptive activitiesin vivoand effect on cell viabilityin vitro.Methods. Characterization of polyphenols present in crude extract (CE), hydroalcoholic fractions of 20-80% ethanol (CE20, CE40, CE60, and CE80), aqueous fraction (AqF), and ethyl acetate (EAF) fractions ofL. ferreafruit was performed by chromatographic analysis.Anti-inflammatory activity was evaluated by using a carrageenan-induced peritonitis model submitted to a leukocyte migration assay and myeloperoxidase activity (MPO) analysis. Total glutathione and malondialdehyde (MDA) levels were assessed to evaluate the oxidative stress level. Antinociceptive activity was evaluated by acetic acid-induced abdominal writhing and hot plate test.In vitrocell viability was determined by using MTT assay in a mouse embryonic fibroblast cell line (3T3 cells).Results. Chromatography revealed the presence of ellagic acid content in EAF (3.06), CE (2.96), and CE40 (2.89). Gallic acid was found in EAF (12.03), CE 20 (4.43), and CE (3.99).L. ferreacrude extract and all fractions significantly reduced leukocyte migration and MPO activity (p<0.001).L. ferreaantioxidant effect was observed through high levels of total glutathione and reduction of MDA levels (p<0.001). Acetic acid-induced nociception was significantly inhibited after administration ofL. ferreacrude extract and all fractions (p<0.001). Crude extract and all fractions significantly increased the viability of the 3T3 cell line (p<0.05).Conclusions. The appropriate extraction procedure preserves the chemical components ofL. ferreafruit, such as gallic acid and ellargic acid. Crude extract and fractions ofL. ferreafruit exhibited anti-inflammatory, antioxidant, antinociceptive activitiesin vivoand enhanced cell viabilityin vitro.


2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Daniela Franco Bueno ◽  
Gerson Shigueru Kabayashi ◽  
Carla Cristina Gomes Pinheiro ◽  
Daniela Y. S. Tanikawa ◽  
Cassio Eduardo Raposo-Amaral ◽  
...  

Abstract Background Bone reconstruction in congenital craniofacial differences, which affect about 2–3% of newborns, has long been the focus of intensive research in the field of bone tissue engineering. The possibility of using mesenchymal stromal cells in regenerative medicine protocols has opened a new field of investigation aimed at finding optimal sources of multipotent cells that can be isolated via non-invasive procedures. In this study, we analyzed whether levator veli palatini muscle fragments, which can be readily obtained in non-invasive manner during palatoplasty in cleft palate patients, represent a novel source of MSCs with osteogenic potential. Methods We obtained levator veli palatini muscle fragments (3–5 mm3), during surgical repair of cleft palate in 5 unrelated patients. Mesenchymal stromal cells were isolated from the muscle using a pre-plating technique and other standard practices. The multipotent nature of the isolated stromal cells was demonstrated via flow cytometry analysis and by induction along osteogenic, adipogenic, and chondrogenic differentiation pathways. To demonstrate the osteogenic potential of these cells in vivo, they were used to reconstruct a critical-sized full-thickness calvarial defect model in immunocompetent rats. Results Flow cytometry analysis showed that the isolated stromal cells were positive for mesenchymal stem cell antigens (CD29, CD44, CD73, CD90, and CD105) and negative for hematopoietic (CD34 and CD45) or endothelial cell markers (CD31). The cells successfully underwent osteogenic, chondrogenic, and adipogenic cell differentiation under appropriate cell culture conditions. Calvarial defects treated with CellCeram™ scaffolds seeded with the isolated levator veli palatini muscle cells showed greater bone healing compared to defects treated with acellular scaffolds. Conclusion Cells derived from levator veli palatini muscle have phenotypic characteristics similar to other mesenchymal stromal cells, both in vitro and in vivo. Our findings suggest that these cells may have clinical relevance in the surgical rehabilitation of patients with cleft palate and other craniofacial anomalies characterized by significant bone deficit.


Blood ◽  
2009 ◽  
Vol 114 (22) ◽  
pp. 283-283
Author(s):  
Randall M Rossi ◽  
Valerie Grose ◽  
Polly Pine ◽  
Richard I Fisher ◽  
Craig T. Jordan ◽  
...  

Abstract Abstract 283 Certain malignant B-cells rely upon B-cell receptor-mediated survival signals. Spleen tyrosine kinase (Syk) initiates and amplifies the B-cell receptor-mediated signal. We and others have demonstrated that fostamatinib disodium (FosD: a prodrug of R406, a potent and specific inhibitor of Syk) induces apoptosis in lymphoma cell lines and primary tumors. A recent clinical trial has demonstrated significant clinical activity of FosD in relapsed/refractory B-cell non-Hodgkin lymphoma (NHL) and chronic lymphocytic leukemia, and minimal overlap in toxicities with conventional agents. Given this background, future development in B-cell NHL will include rational combinations of FosD and currently available therapies. Therefore, we conducted in vitro and in vivo studies of rational combinations including FosD, in anticipation of clinical trial development. First, using a human DLBCL cell line of GCB genotype, (OCI-Ly19), we analyzed in vitro the combination of R406 with the following agents: fludarabine, rapamycin, rituximab, bendamustine and bortezomib. Increased cytotoxicity was observed using in vitro culture assays with the addition of fludarabine, rapamycin, or rituximab to R406. Cell viability at 72 hours was 25% with R406 alone, 27% for fludarabine alone, and only 9% for the fludarabine/R406. At 48 hours, cell viability was 49% using R406 alone, 31% using rituximab alone, and 21% for rituximab/R406. At 120 hours using primary lymphoma cells (DLCL27), there were no viable cells treated with the rapamycin/FosD combination, compared with rapamycin alone (7%) or FosD alone (25%) The addition of bortezomib or bendamustine to FosD resulted in only a minimal additive increase in cytotoxicity. Results with all combinations were similar with the OCI-Ly10 human DLBCL line of ABC genotype. We then performed in vivo studies by subcutaneous transplantation of the DLBCL cell line OCI-Ly19, (engineered to express luciferase allowing for real time in vivo imaging) into immune deficient NOD/SCID mice which reproducibly formed tumors. Recipient animals were separated into uniform cohorts when the tumors were less than or equal to 500 mm3 in size. The animals were then simultaneously treated with FosD (n=7; 3 gm/kg ad. lib.; translates into 2-5 micromolar R406 systemically throughout the 24h period) and either bortezomib, (n=6; 0.4 mg/kg weekly IP), or rituximab, (n=13; 3 mg/kg, 2x weekly IP). Analysis of the OCI-Ly19 tumor volumes at day 46 showed a median of 2364 mm3 with bortezomib alone compared with 1823 mm3 with bortezomib and FosD. When FosD was combined with rituximab the most significant cytotoxicity was observed: (p=0.01; median tumor volume of 497 mm3 following the combination) in comparison to either FosD alone (3150 mm3) or rituximab alone (1764 mm3). We conclude that the addition of FosD appears to increase activity against NHL of several drugs, including fludarabine and rapamycin. These agents have significant activity in indolent and mantle cell NHL as well as CLL. Moreover, there is no evidence that FosD impedes rituximab responses in vitro or in vivo; in fact we have suggested possible synergy with the combination of rituximab and FosD. Based upon the documented single agent activity of FosD in humans, and this data, clinical trials are now indicated using these promising combinations in NHL and CLL. Disclosures: Pine: Rigel: Employment. Friedberg:Rigel: Research Funding.


2020 ◽  
Author(s):  
Yue-zhi Zhang ◽  
Shu-jing Ge ◽  
Qing-zhen Leng ◽  
Jian-jun Ma ◽  
Hanchen Liu

Abstract Background: This study aimed to confirm the cytotoxicity of zymosan in AHH-1 cells and HIECs and to determine the treatment time and dose of zymosan at which it exerts radioprotective effects.Methods: AHH-1 cells and HIECs were administered 0, 20, 40, 80 or 160 μg/mL zymosan. The CCK-8 assay and flow cytometry were used to evaluate cell viability and apoptosis 24 h, 48 h, and 72 h after administration. Furthermore, 12 h before irradiation, the cells were treated with 0, 5, 10, or 20 μg/mL zymosan and then irradiated with 4 Gy X-rays. Cell viability and apoptosis were measured by the CCK-8 assay and flow cytometry at 24 h. In addition, the protective effect of zymosan against radiation in vitro was compared to that of 20 μg/mL LPS as a positive control. In vivo, weight, the spleen index and the thymus index were measured to evaluate the toxicity of 0, 5, 10, 20 and 10 mg/kg zymosan. In addition, rats were treated with 0, 2, 4, 8 or 10 mg/kg zymosan and then irradiated with 7 Gy X-rays. The survival rate, spleen index and thymus index were evaluated. The protective effect of zymosan against radiation in vivo was compared to that of 10 mg/kg LPS a positive control. Results: The viability and apoptosis of cells treated with different doses of zymosan for different treatment times were not different from those of control cells (p<0.05). Furthermore, cell viability and apoptosis were clearly improved after zymosan preadministration (p<0.05). The radioprotective effect of zymosan was dose-dependent. In addition, the viability of cells pretreated with zymosan was higher than that of cells pretreated with LPS, and the apoptosis rate of zymosan-treated cells was lower than that of cells pretreated with LPS (p<0.05). In vivo, weight, the spleen index and the thymus index were significantly decreased by zymosan at a concentration of 20 mg/kg (p<0.05). Further experiments showed that the concentration at which zymosan exerted radioprotective effects was 10 mg/kg. The radioprotective effect of zymosan was better than that of LPS pretreatment (p<0.05). Conclusion: Zymosan is nontoxic to cells and exerts a better radioprotective effect than LPS.


2021 ◽  
Vol 11 ◽  
Author(s):  
Tingting Liu ◽  
Hongyue Wang ◽  
Zhiyong Liu ◽  
Jing Zhang ◽  
Yan Liu ◽  
...  

Objective: We screened the TNBC stem cells using phage display (PD) and acquired the specific binding clones; and then the positive phage DNAs were amplified and extracted, synthesized with specific polypeptides, and labeled with fluorescein isothiocyanate (FITC). Finally, we identified the specificity of the polypeptides in vitro and in vivo.Methods: Human breast cancer cell line MDA-MB-231 and human mammary gland cell line hs578bst were chosen in our study, and MDA-MB-231 breast cancer stem cells (BCSCs) were cultured and identified by flow cytometry. The phage peptide library was screened using MDA-MB-231 BCSCs, the positive phage clones were identified by ELISA, and the DNA of the positive phages was extracted and sent to a biotechnology company for sequencing. According to the sequencing results, a specific polypeptide was synthesized and labeled with FITC. In the end, the specificity of a polypeptide to BCSCs was identified in vivo and in vitro.Results: The MDA-MB-231 BCSCs were cultured and enriched with the “serum and serum-free alternate” method. The BCSCs were found to have characteristics of CD44+/CD24−/low epithelial surface antigen (ESA) and ALDH+ with flow cytometry. The phage was enriched to 200-fold after three rounds of screening for MDA-MB-231 BCSCs. The positive phages were sequenced; then a polypeptide named M58 was synthesized according to sequencing results. Polypeptide M58 has a specific affinity to MDA-MB-231 BCSCs in vivo and in vitro.Conclusion: Specific polypeptides binding to MDA-MB-231 BCSCs were screened out by PD screening method, which laid a theoretical foundation for the targeted therapy and further research of BCSCs.


PLoS ONE ◽  
2014 ◽  
Vol 9 (1) ◽  
pp. e83818 ◽  
Author(s):  
Omar Saeed Ali Al-Salahi ◽  
Dan Ji ◽  
Amin Malik Shah Abdul Majid ◽  
Chan Kit-Lam ◽  
Wan Zaidah Abdullah ◽  
...  

1996 ◽  
Vol 3 (2) ◽  
pp. 63-66 ◽  
Author(s):  
Lorraine K. Webster ◽  
Silvina Rainone ◽  
Ernst Horn ◽  
Edward R. T. Tiekink

The [Ph3PAu(6-MP)] complex, where 6-MPH is 6-mercaptopurine, is active against the cisplatinresistant cell line, mouse leukaemia L1210/DDP, as is the precursor compound [Ph3PAuCl], suggesting that the thiolate is not critical for activity. Against the human cell lines, FaDu (squamous cell carcinoma) and SKOV-3 (ovarian carcinoma), both [Ph3PAu(6-MP)] and [Ph3PAu(6-TG)], where 6-TGH is 6-thioguanine, were active. [Ph3PAu(6-MP)] was active against a murine PC6 plasmacytoma, but not as active as cisplatin.


2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Yue-zhi Zhang ◽  
Shu-jing Ge ◽  
Qing-zhen Leng ◽  
Jian-jun Ma ◽  
Han-chen Liu

Abstract Background This study aimed to confirm the cytotoxicity of zymosan in vitro and in vivo and determine the appropriate treatment time and the dose of zymosan. Methods AHH-1 cells and HIECs were administered by 0, 20, 40, 80 or 160 μg/mL zymosan. The CCK-8 assay and flow cytometry were used to evaluate the cell viability and apoptosis 24 h, 48 h, and 72 h after administration. Furthermore, 12 h before irradiation, the cells were treated with 0, 5, 10, or 20 μg/mL zymosan and then irradiated with 4 Gy X-rays. Cell viability and apoptosis were measured by the CCK-8 assay and flow cytometry at 24 h. In addition, the protective effect of zymosan against radiation in vitro was compared to that of 20 μg/mL LPS. In vivo, weight, the spleen index, and the thymus index were measured to evaluate the toxicity of 0, 5, 10, 20, and 10 mg/kg zymosan. In addition, rats were treated with 0, 2, 4, 8, or 10 mg/kg zymosan and then irradiated with 7 Gy X-rays. The survival rate, organ index were evaluated. The protective effect of zymosan against radiation in vivo was compared to that of 10 mg/kg LPS a positive control. Results The viability and apoptosis of cells treated with different doses and treatment times of zymosan were not different from those of control cells (p < 0.05). Furthermore, cell viability and apoptosis were clearly improved after zymosan preadministration (p < 0.05). The radioprotective effect of zymosan was dose-dependent. In addition, the viability of cells pretreated with zymosan was higher than that of cells pretreated with LPS, and the apoptosis rate of zymosan-treated cells was lower than that of cells pretreated with LPS (p < 0.05). In vivo, weight, the spleen index and the thymus index were significantly decreased by zymosan at a concentration of 20 mg/kg (p < 0.05). Further experiments showed that the concentration at which zymosan exerted radioprotective effects was 10 mg/kg. The survival curves in the irradiated rats were barely separated between the LPS treatment and zymosan treatment. Conclusion Zymosan administration before radiation exposure significantly increased cell viability and the survival rates of rats.


2021 ◽  
Vol 11 ◽  
Author(s):  
Qing Xiao ◽  
Qi-Meng Liu ◽  
Ru-Chao Jiang ◽  
Kai-Feng Chen ◽  
Xiang Zhu ◽  
...  

Previous studies have indicated that α1D/1A antagonist naftopidil (NAF) suppresses prostate growth by decreasing cell proliferation without affecting apoptosis and prostate volume in benign prostatic hyperplasia (BPH). A NAF-derived α1D/1A antagonist 1- benzyl-N-(3-(4-(2-methoxyphenyl) piperazine-1-yl) propyl)-1H-indole-2- carboxamide (HJZ-12) has been reported from our laboratory, which exhibits high subtype-selectivity to both α1D- and α1A- AR (47.9- and 19.1- fold, respectively) with respect to a1B-AR in vitro. However, no further study was conducted. In the present study, a pharmacological evaluation of HJZ-12 in BPH was performed on an estrogen/androgen-induced rat BPH model and human BPH-1 cell line. In vivo, HJZ-12 exhibited better performance than NAF in preventing the progression of rat prostatic hyperplasia by not only decreasing prostate weight and proliferation (similar to NAF) but also, shrinking prostate volume and inducing prostate apoptosis (different from NAF). In vitro, HJZ-12 exhibited significant cell viability inhibition and apoptotic induction in BPH-1 cell line, without presenting cell anti-proliferation properties. Intriguingly, the role of HJZ-12 on cell viability and apoptosis was an α1-independent action. Furthermore, RNA-Seq analysis was applied to screen out six anti-apoptotic genes (Bcl-3, B-lymphoma Mo-MLV insertion region 1 [Bmi-1], ITGA2, FGFR3, RRS1, and SGK1). Amongst them, Bmi-1 was involved in the apoptotic induction of HJZ-12 in BPH-1. Overall, HJZ-12 played a remarkable role in preventing the progression of prostatic hyperplasia through α1-independent apoptotic induction, indicating that it will be a multi-target effective candidate for BPH treatment.


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