scholarly journals The chemomodulatory effects of glufosfamide on docetaxel cytotoxicity in prostate cancer cells

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2168 ◽  
Author(s):  
Reem T. Attia ◽  
Mai F. Tolba ◽  
Ruchit Trivedi ◽  
Mariane G. Tadros ◽  
Hossam M.M. Arafa ◽  
...  

Background. Glufosfamide (GLU) is a glucose conjugate of ifosfamide in which isophosphoramide mustard is glycosidically linked to theβ-D-glucose molecule. Based on GLU structure, it is considered a targeted chemotherapy with fewer side effects. The main objective of the current study is to assess the cytotoxic potential of GLU for the first time in prostate cancer (PC) cells representing different stages of the tumor. Furthermore, this study examined the potential synergistic activity of GLU in combination with docetaxel (DOC).Methods. Two different cell lines were used, LNCaP and PC-3. Concentration-response curves were assessed. The tested groups per cell line were, control, GLU, DOC and combination. Treatment duration was 72 h. Cytotoxicity was assessed using sulforhodamine B (SRB) assay and half maximal inhibitory concentration (IC50) was calculated. Synergy analyses were performed using Calcusyn®software. Subsequent mechanistic studies includedβ-glucosidase activity assay, glucose uptake and apoptosis studies, namely annexin V-FITC assay and the protein expression of mitochondrial pathway signals including Bcl-2, Bax, Caspase 9 and 3 were assessed. Data are presented as mean ± SD; comparisons were carried out using one way analysis of variance (ANOVA) followed by Tukey-Kramer’s test for post hoc analysis.Results. GLU induced cytotoxicity in both cell lines in a concentration-dependent manner. The IC50 in PC-3 cells was significantly lower by 19% when compared to that of LNCaP cells. The IC50 of combining both drugs showed comparable effect to DOC in PC-3 but was tremendously lowered by 49% compared to the same group in LNCaP cell line.β-glucosidase activity was higher in LNCaP by about 67% compared to that determined in PC-3 cells while the glucose uptake in PC-3 cells was almost 2 folds that found in LNCaP cells. These results were directly correlated to the efficacy of GLU in each cell line. Treatment of PC cells with GLU as single agent or in combination with DOC induced significantly higher apoptosis as evidenced by Annexin V-staining. Apoptosis was significantly increased in combination group by 4.9 folds and by 2.1 Folds when compared to control in LNCaP cells and PC-3 cells; respectively. Similarly, the expression of Bcl-2 was significantly decreased while Bax, caspase 9 and 3 were significantly increased in the combined treatment groups compared to the control.Conclusion. GLU has a synergistic effect in combination with DOC as it increases the cell kill which can be attributed at least partially to apoptosis in both the tested cell lines and it is suggested as a new combination regimen to be considered in the treatment of the prostate cancer. Further experiments and clinical investigations are needed for assessment of that regimen.

2020 ◽  
Vol 7 ◽  
Author(s):  
Priscila E. Kobayashi ◽  
Patrícia F. Lainetti ◽  
Antonio F. Leis-Filho ◽  
Flávia K. Delella ◽  
Marcio Carvalho ◽  
...  

Canine prostate cancer (PC) presents a poor antitumor response, usually late diagnosis and prognosis. Toceranib phosphate (TP) is a nonspecific inhibitor of receptor tyrosine kinases (RTKs), including vascular endothelial growth factor receptor (VEGFR), platelet-derived growth factor receptor (PDGFR), and c-KIT. This study aimed to evaluate VEGFR2, PDGFR-β, and c-KIT protein expression in two established canine PC cell lines (PC1 and PC2) and the transcriptome profile of the cells after treatment with TP. Immunofluorescence (IF) analysis revealed VEGFR2 and PDGFR-β protein expression and the absence of c-KIT protein expression in both cell lines. After TP treatment, only the viability of PC1 cells decreased in a dose-dependent manner. Transcriptome and enrichment analyses of treated PC1 cells revealed 181 upregulated genes, which were related to decreased angiogenesis and cell proliferation. In addition, we found upregulated PDGFR-A, PDGFR-β, and PDGF-D expression in PC1 cells, and the upregulation of PDGFR-β was also observed in treated PC1 cells by qPCR. PC2 cells had fewer protein-protein interactions (PPIs), with 18 upregulated and 22 downregulated genes; the upregulated genes were involved in the regulation of parallel pathways and mechanisms related to proliferation, which could be associated with the resistance observed after treatment. The canine PC1 cell line but not the PC2 cell line showed decreased viability after treatment with TP, although both cell lines expressed PDGFR and VEGFR receptors. Further studies could explain the mechanism of resistance in PC2 cells and provide a basis for personalized treatment for dogs with PC.


2021 ◽  
Author(s):  
Md Imtiaz Khalil ◽  
Vibha Singh ◽  
Judy King ◽  
Arrigo De Benedetti

Abstract Background: Majority of prostate cancer (PCa) related fatalities occur due to metastasis of cancer cells to adjacent and distal organs. We identified the novel interaction between two kinases (TLK1-MK5) that in part may initiate a signaling cascade promoting PCa metastasis. In PCa, TLK1-MK5 signaling might be crucial as androgen deprivation therapy leads to increased expression of TLK1 and compensatory activation of MK5 in metastatic castration-resistant prostate cancer patients. Methods: We performed scratch wound repair and 3D chemotactic migration assays to determine the motility rates of different TLK1 and MK5 perturbed cells. Co-IP, His, and GST pull down, in vitro kinase (IVK) assays and mass spectrometry (MS) were conducted to determine TLK1-MK5 interaction and phosphorylation. Western blotting (WB), immunohistochemistry (IHC) and bioinformatic analysis were used to examine TLK1 and pMK5 levels in PCa cell lines, mice prostate tumors and PCa tissue microarray (TMA). Results: Both genetic depletion and pharmacologic inhibition of TLK1 and MK5 can significantly reduce wound healing rate in MEF and LNCaP cells. However, TLK1 overexpression alone in the MK5 −/− MEF cells did not increase the wound healing which suggested that TLK1 cannot enhance cellular migration in absence of MK5. Our reciprocal co-IPs, His- and GST pull down assays confirmed TLK1-MK5 interaction in cultured cells. Incubation of purified recombinant TLK1B and MK5 increases the phosphorylation of MK5 and its kinase activity. MS analysis identified three unique phosphorylation sites in MK5 (S160, S354, S386) by TLK1B. While our WB detected substantial amount of pMK5 S354 and TLK1 in all major PCa cell lines, anti-androgen treatment increased pMK5 S354 level in a dose-dependent manner and pharmacologic inhibition of TLK1 reduces pMK5 S354 level in LNCaP cells. IHC staining of TRAMP mice prostate tissues also exhibited increased pMK5 S354 level in aggressive tumor compared to benign regions. Finally, IHC analysis of PCa TMA indicated a correlation between elevated pMK5 S354 level and generally higher Gleason scores as well as nodal metastatic status of the tumors. Conclusion: Our data support that TLK1-MK5 signaling is functionally involved in driving PCa cell motility and clinical aggressiveness, hence, disruption of this axis may inhibit the metastasis of PCa.


Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 3471-3471
Author(s):  
Amy Johnson ◽  
Lisa Smith ◽  
Jiuxiang Zhu ◽  
Nyla Heerema ◽  
Sara Guster ◽  
...  

Abstract Chronic lymphocytic leukemia (CLL) is an incurable adult leukemia characterized by disrupted apoptosis. While the majority of patients with CLL are asymptomatic at diagnosis, most progress and require therapy. Identification of new targets and therapeutic agents is therefore a high priority for the treatment of CLL. Synthetic chemistry yielded derivatives of the COX-2 inhibitor, celecoxib, with increased ability to induce apoptosis in the 1–10 μ M range in prostate cancer cells, a similar proposed mechanism of action, and increased in vivo activity in a murine prostate cancer xenograft model. Based upon these data, a Rapid Access to Intervention Development (RAID) proposal is underway to generate OSU03012 for clinical studies in prostate cancer. In addition, we are examining the biologic effects of these new agents in primary CLL cells and lymphoblastic cell lines, showing a novel mechanism of cell killing independent of caspase activation and bcl-2 over-expression. To determine the in vitro activity against CLL cells, 11 CLL patient PBMCs were incubated in various concentrations of OSU03012. The LC50 at 24 hrs was 7.12μM and decreased to 5.45μM at 72 hrs. We show both early (annexin-V positive) and late (both annexin-V/PI positive) apoptosis concurrent with loss of mitochondrial membrane potential typical of apoptosis. These data suggest OSU03012 is highly cytotoxic toward CLL cells in vitro at doses well below those attainable without toxicity in a murine model. Additionally, we show that OSU03012 mediates apoptosis by activation of the intrinsic, mitochondrial pathway of apoptosis but also activates alternative caspase independent cell death pathways. CLL cells from 8 patients were incubated in 10μM OSU03012 for 24 hrs and assessed for caspase-3 and PARP. Immunoblots reveal a dose dependent increase in active caspase-3 concurrent with a decrease in the pro-form. This occurred concurrently with the appearance of the 85 kD cleaved product of PARP that is a known downstream target of caspase-3. In the same 8 patient lysates we saw no change in the inactive pro-form of caspase-8, but consistent processing of caspase-9. These data suggest that OSU03012 in part utilizes the intrinsic pathway of apoptosis to promote CLL cell death. Incubation of CLL cells with z-VAD-fmk and OSU03012 did not abrogate cell death, but eliminated processing of caspase-9, caspase-3 and PARP, suggesting that this agent also activates caspase independent mechanisms of cell death. Given the caspase dependent and independent pathways utilized by OSU03012, we assessed the dependence of cell death on bcl-2 expression. Here we show that bcl-2 over-expression in the 697 lymphoblastic cell line greatly diminishes the apoptosis observed with fludarabine, but potent apoptosis is equally observed with OSU03012 compared to the empty vector cell line. Furthermore, in the bcl-2 over-expressing cell line, caspase-3 and PARP cleavage was not observed despite equivalent apoptosis supporting further multiple mechanisms of cell killing induced by OSU03012. In summary, OSU03012 is an oral bioavailable therapeutic agent that has potent in vitro activity against primary CLL cells. This cytotoxicity is mediated by both caspase dependent and independent pathways and can overcome bcl-2 over-expression. These data provide support for further investigation of the mechanism of action of OSU03012 in CLL cells and performance of early Phase I studies in CLL as part of the RAID process.


Blood ◽  
2010 ◽  
Vol 116 (21) ◽  
pp. 3974-3974
Author(s):  
Koramit Suppipat ◽  
Xiao Zhu ◽  
Chun Shik Park ◽  
H. Daniel Lacorazza

Abstract Abstract 3974 Acute lymphoblastic leukemia (ALL) is the most common form of hematologic malignancy in children. In spite of significant advances achieved in the treatment of childhood ALL, one fifth of these patients still relapse after the standard treatment. Moreover, relapse ALL is the second most common cause of cancer-related deaths in children. The development of novel therapies is prevented by a limited understanding of the exact pathobiology. There are emerging evidences that the transcription factor KLF4 has a tumor suppressor property in ALL. Recently, a gene expression classifier study in pediatric precursor B-cell ALL (pre-B ALL) showed that KLF4 expression was significantly reduced in high risk ALL patients with positive MRD after induction. This finding suggests a possible role of this cell cycle inhibitor on the development, expansion and drug-resistant of leukemic cells. Several studies demonstrate that overexpression of KLF4 in normal B cells and BCR transformed B cells show increased apoptosis and reduced proliferation. Furthermore, we recently described that KLF4 inhibits proliferation of naïve lymphocytes by activating p21 (Yamada, et al, 2009). Sulphoraphane (SF; 4-methylsulfonylbutyl isothiocyanate) is a dietary compound derived from Cruciferae vegetables with anti-carcinogenic activity in colon cancer by upregulating KLF4 and p21 among other genes. Thus, we hypothesized that SF could also exhibit anti-leukemic activity in human-derived acute lymphoblastic leukemia cells via the activation of KLF4. The pre-B ALL cell lines (Nalm6, REH, RS-4, SUP-B15) and an EBV transformed B cell line were treated with different concentrations of SF (0-40 μM) for 24–48 hours. Then, cell number was estimated using an ATP-based viability method. Flow cytometric analysis of ANNEXIN-V/7-AAD binding as well as CFSE dilution was used to measure apoptosis and proliferation respectively. We found that SF induced cytotoxicity in Nalm-6, REH and RS-4 cell lines in a dose and time dependent manner. This cytotoxic effect was less pronounced in EBV-transformed B cell line. SF treatment led to increased ANNEXIN-V and 7-AAD positive cells (82% apoptotic cells in SF-treated versus 9% in DMSO control). Further, SF-treated cells displayed significantly less proliferation in comparison to DMSO controls thus suggesting that SF inhibits cellular proliferation. Preliminary data also suggest that SF-mediated apoptosis is caused by upregulation of KLF4. In conclusion, Sulphoraphane exhibits an anti-leukemic property by inducing apoptosis and abrogating proliferation in pre-B ALL cell lines. Thus, sulphoraphane could potentially be used as an adjunctive therapy in a subgroup of pre-B ALL patients who have decreased expression of KLF4. Disclosures: No relevant conflicts of interest to declare.


1992 ◽  
Vol 68 (06) ◽  
pp. 662-666 ◽  
Author(s):  
W Hollas ◽  
N Hoosein ◽  
L W K Chung ◽  
A Mazar ◽  
J Henkin ◽  
...  

SummaryWe previously reported that extracellular matrix invasion by the prostate cancer cell lines, PC-3 and DU-145 was contingent on endogenous urokinase being bound to a specific cell surface receptor. The present study was undertaken to characterize the expression of both urokinase and its receptor in the non-invasive LNCaP and the invasive PC-3 and DU-145 prostate cells. Northern blotting indicated that the invasive PC-3 cells, which secreted 10 times more urokinase (680 ng/ml per 106 cells per 48 h) than DU-145 cells (63 ng/ml per 106 cells per 48 h), had the most abundant transcript for the plasminogen activator. This, at least, partly reflected a 3 fold amplification of the urokinase gene in the PC-3 cells. In contrast, urokinase-specific transcript could not be detected in the non-invasive LNCaP cells previously characterized as being negative for urokinase protein. Southern blotting indicated that this was not a consequence of deletion of the urokinase gene. Crosslinking of radiolabelled aminoterminal fragment of urokinase to the cell surface indicated the presence of a 51 kDa receptor in extracts of the invasive PC-3 and DU-145 cells but not in extracts of the non-invasive LNCaP cells. The amount of binding protein correlated well with binding capacities calculated by Scatchard analysis. In contrast, the steady state level of urokinase receptor transcript was a poor predictor of receptor display. PC-3 cells, which were equipped with 25,000 receptors per cell had 2.5 fold more steady state transcript than DU-145 cells which displayed 93,000 binding sites per cell.


2020 ◽  
Vol 16 (6) ◽  
pp. 735-749 ◽  
Author(s):  
Özgür Yılmaz ◽  
Burak Bayer ◽  
Hatice Bekçi ◽  
Abdullahi I. Uba ◽  
Ahmet Cumaoğlu ◽  
...  

Background:: Prostate cancer is still one of the serious causes of mortality and morbidity in men. Despite recent advances in anticancer therapy, there is a still need of novel agents with more efficacy and specificity in the treatment of prostate cancer. Because of its function on angiogenesis and overexpression in the prostate cancer, methionine aminopeptidase-2 (MetAP-2) has been a potential target for novel drug design recently. Objective:: A novel series of Flurbiprofen derivatives N-(substituted)-2-(2-(2-fluoro-[1,1'- biphenyl]-4-il)propanoyl)hydrazinocarbothioamide (3a-c), 4-substituted-3-(1-(2-fluoro-[1,1'-biphenyl]- 4-yl)ethyl)-1H-1,2,4-triazole-5(4H)-thione (4a-d), 3-(substitutedthio)-4-(substituted-phenyl)- 5-(1-(2-fluoro-[1,1'-biphenyl]-4-yl)ethyl)-4H-1,2,4-triazole (5a-y) were synthesized. The purpose of the research was to evaluate these derivatives against MetAP-2 in vitro and in silico to obtain novel specific and effective anticancer agents against prostate cancer. Methods: The chemical structures and purities of the compounds were defined by spectral methods (1H-NMR, 13C-NMR, HR-MS and FT-IR) and elemental analysis. Anticancer activities of the compounds were evaluated in vitro by using MTS method against PC-3 and DU-143 (androgenindependent human prostate cancer cell lines) and LNCaP (androgen-sensitive human prostate adenocarcinoma) prostate cancer cell lines. Cisplatin was used as a positive sensitivity reference standard. Results:: Compounds 5b and 5u; 3c, 5b and 5y; 4d and 5o showed the most potent biological activity against PC3 cancer cell line (IC50= 27.1 μM, and 5.12 μM, respectively), DU-145 cancer cell line (IC50= 11.55 μM, 6.9 μM and 9.54 μM, respectively) and LNCaP cancer cell line (IC50= 11.45 μM and 26.91 μM, respectively). Some compounds were evaluated for their apoptotic caspases protein expression (EGFR/PI3K/AKT pathway) by Western blot analysis in androgen independent- PC3 cells. BAX, caspase 9, caspsase 3 and anti-apoptotic BcL-2 mRNA levels of some compounds were also investigated. In addition, molecular modeling studies of the compounds on MetAP-2 enzyme active site were evaluated in order to get insight into binding mode and energy. Conclusion:: A series of Flurbiprofen-thioether derivatives were synthesized. This study presented that some of the synthesized compounds have remarkable anticancer and apoptotic activities against prostate cancer cells. Also, molecular modeling studies exhibited that there is a correlation between molecular modeling and anticancer activity results.


2018 ◽  
Vol 18 (4) ◽  
pp. 573-582 ◽  
Author(s):  
Khaled R.A. Abdellatif ◽  
Mostafa M. Elbadawi ◽  
Mohammed T. Elsaady ◽  
Amer A. Abd El-Hafeez ◽  
Takashi Fujimura ◽  
...  

Background: Some 2-thioxoimidazolidinones have been reported as anti-prostate and anti-breast cancer agents through their inhibitory activity on topoisomerase I that is considered as a potential chemotherapeutic target. Objective: A new series of 3,5-disubstituted-2-thioxoimidazolidinone derivatives 10a-f and their S-methyl analogs 11a-f were designed, synthesized and evaluated for cytotoxicity against human prostate cancer cell line (PC-3), human breast cancer cell line (MCF-7) and non-cancerous human lung fibroblast cell line (WI-38). </P><P> Results and Method: While compounds 10a-f showed a broad range of activities against PC-3 and MCF-7 cell lines (IC50 = 34.0 – 186.9 and 24.6 – 147.5 µM respectively), the S-methyl analogs 11a-f showed (IC50 = 22.7 – 198.5 and 16.9 – 188.2 µM respectively) in comparison with 5-fluorouracil (IC50 = 60.7 and 40.7 µM respectively). 11c (IC50 = 22.7 and 29.2 µM) and 11f (IC50 = 28.7 and 16.9 µM) were the most potent among all compounds against both PC-3 and MCF-7 respectively with no cytotoxicity against WI-38. Conclusion: The newly synthesized compounds showed good activity against PC-3 and MCF-7 cell lines in comparison with 5-fluorouracil. Compounds 11c and 11f bound with human topoisomerase I similar to its known inhibitors and significantly inhibited its DNA relaxation activity in a dose dependent manner which may rationalize their molecular mechanism as cytotoxic agents.


2020 ◽  
Vol 20 (6) ◽  
pp. 930-942 ◽  
Author(s):  
Imran Khan ◽  
Sadaf Mahfooz ◽  
Irfan A. Ansari

Background: In recent years, natural products have received great attention for cancer prevention owing to their various health benefits, noticeable lack of toxicity and side effects, and the limitations of chemotherapeutic agents. Andrographolide, a labdane diterpenoid is a principal bioactive constituent of Andrographis paniculata Nees, exhibits significant anticancer activity. Objective: The efficacy of andrographolide on colon cancer cells is yet to be elucidated completely. Therefore, we investigated the anticancer efficiency of andrographolide in colon cancer DLD1 cell line. Methods: Antiproliferative activity of andrographolide on DLD1 cells was evaluated by MTT assay, LDH release assay, morphological analysis and colony formation assay. Induction of apoptosis was determined by DAPI staining, Annexin V-FITC staining assay, and caspase-3 activation assay. Role of andrographolide induced cellular reactive oxygen species (ROS) and its association with apoptosis induction in DLD1 cells was elucidated by DCFDA dye. Synergistic ability of andrographolide with 5- fluorouracil (5-FU) and paclitaxel (PTX) was evaluated by MTT assay. Results: Results of the present study indicated that andrographolide declined cell viability of DLD1 cells in a concentration and time-dependent manner. Andrographolide induced apoptosis via nuclear condensation, phosphatidylserine externalization and caspase-3 activation. It also augmented cellular ROS levels which were in turn associated with apoptosis induction in DLD1 cells. Moreover, andrographolide displayed synergistic activity with 5-FU and PTX against DLD1 cells. Conclusion: The present study showed that andrographolide demonstrated antiproliferative and apoptotic properties, moreover it also displayed synergistic effect with chemotherapeutic drugs in colon cancer DLD1 cells.


Molecules ◽  
2021 ◽  
Vol 26 (8) ◽  
pp. 2212
Author(s):  
Mohammad Shahidul Islam ◽  
M. Ali ◽  
Abdullah Mohammed Al-Majid ◽  
Abdullah Saleh Alamary ◽  
Saeed Alshahrani ◽  
...  

The Friedel–Crafts reaction between substituted indoles as nucleophiles with chalcones-based benzofuran and benzothiophene scaffolds was carried out by employing a highly efficient bimetallic iron–palladium catalyst system. This catalytic approach produced the desired bis-heteroaryl products with low catalyst loading, a simple procedure, and with acceptable yield. All synthesized indole scaffolds 3a–3s were initially evaluated for their cytotoxic effect against human fibroblast BJ cell lines and appeared to be non-cytotoxic. All non-cytotoxic compounds 3a–3s were then evaluated for their anticancer activities against cervical cancer HeLa, prostate cancer PC3, and breast cancer MCF-7 cell lines, in comparison to standard drug doxorubicin, with IC50 values 1.9 ± 0.4 µM, 0.9 ± 0.14 µM and 0.79 ± 0.05 µM, respectively, and appeared to be moderate to weak anticancer agents. Fluoro-substituted chalcone moiety-containing compounds, 3b appeared to be the most active member of the series against cervical HeLa (IC50 = 8.2 ± 0.2 µM) and breast MCF-7 cancer cell line (IC50 = 12.3 ± 0.04 µM), whereas 6-fluroindol-4-bromophenyl chalcone-containing compound 3e (IC50 = 7.8 ± 0.4 µM) appeared to be more active against PC3 prostate cancer cell line.


2020 ◽  
Vol 45 (4) ◽  
pp. 423-428
Author(s):  
Ali Mert Özgönül ◽  
Aycan Aşık ◽  
Burak Durmaz ◽  
Ramin Aslaminabad ◽  
Cumhur Gündüz ◽  
...  

AbstractObjectivesRecently, phenolic compounds (quercetin, kaempferol, ellagic acid (EA), and myricetin) as natural sources have been suggested to be used for treatment and chemoprevention of prostate cancer. Since rosehip includes the above molecules in high concentration, we set out to investigate possible anti-proliferative effect of rosehip tea on the prostate cancer cell line.MethodsThe flavonol content of rosehip tea prepared at different temperatures and time intervals was determined first and then the antiproliferative effect of tea samples was established by adding tea samples to the prostate cancer cell line (VCaP and LNCaP).ResultsQuercetin was more effective in LNCaP cell than in VCaP cell (IC50 = 20 and 200 μM, respectively). The boiled fruit shredded at minute 7 showed the highest levels of quercetin, EA and kaempferol and the boiled fruit at minute 7 had the highest levels of kaempferol and EA. The tea samples were prepared in concentrations relevant to their IC50 values, added to the VCaP and LNCaP cell lines. The antiproliferative effect of rosehip tea on VCaP cells was slightly greater than that of LNCaP cells.ConclusionEach of the flavonols exhibits an antiproliferative effect. Our data clearly indicated that rosehip as a natural source of all flavonols had an antiproliferative effect on androgen-sensitive prostate cancer. Now that it is important to use natural sources in cancer, rosehip seems to be a promising natural product to be used to treat the prostate illness.


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