scholarly journals Potent anti-tumor activity of a syringolin analog in multiple myeloma: a dual inhibitor of proteasome activity targeting β2 and β5 subunits

Oncotarget ◽  
2018 ◽  
Vol 9 (11) ◽  
pp. 9975-9991 ◽  
Author(s):  
Takashi Yoshida ◽  
Masaki Ri ◽  
Takashi Kanamori ◽  
Sho Aoki ◽  
Reham Ashour ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Proteasome Activity ◽  
Dual Inhibitor ◽  
Anti Tumor Activity

scholarly journals Anti-tumor activity of a novel proteasome inhibitor D395 against multiple myeloma and its lower cardiotoxicity compared with carfilzomib

2021 ◽  
Vol 12 (5) ◽  
Author(s):  
Xuxing Shen ◽  
Chao Wu ◽  
Meng Lei ◽  
Qing Yan ◽  
Haoyang Zhang ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Proteasome Inhibitor ◽  
Osteoclast Differentiation ◽  
Dependent Manner ◽  
Serum Enzyme ◽  
Herg Channels ◽  
Anti Tumor Activity ◽  
Dose Dependent

AbstractCarfilzomib, a second-generation proteasome inhibitor, has significantly improved the survival rate of multiple myeloma (MM) patients, but its clinical application is still restricted by drug resistance and cardiotoxicity. Here, we identified a novel proteasome inhibitor, D395, and assessed its efficacy in treating MM as well as its cardiotoxicity at the preclinical level. The activities of purified and intracellular proteasomes were measured to determine the effect of D395 on the proteasome. CCK-8 and flow cytometry experiments were designed to evaluate the effects of D395 on cell growth and apoptosis. The effects of D395 and carfilzomib on serum enzyme activity, echocardiography features, cardiomyocyte morphology, and hERG channels were also compared. In our study, D395 was highly cytotoxic to MM cell lines and primary MM cells but not normal cells, and it was well tolerated in vivo. Similar to carfilzomib, D395 inhibited osteoclast differentiation in a dose-dependent manner. In particular, D395 exhibited lower cardiotoxicity than carfilzomib in all experiments. In conclusion, D395 is a novel irreversible proteasome inhibitor that has remarkable anti-MM activity and mild cardiotoxicity in vitro and in vivo.

scholarly journals PS1360 LONG NON-CODING RNA NEAT1 TARGETING TRIGGERS ANTI-TUMOR ACTIVITY AND RESULTS IN CHEMO-SENSITIZING EFFECT IN MULTIPLE MYELOMA CELLS

HemaSphere ◽  
2019 ◽  
Vol 3 (S1) ◽  
pp. 621
Author(s):  
E. Taiana ◽  
V.K. Favasuli ◽  
D. Ronchetti ◽  
K. Todoerti ◽  
F. Pelizzoni ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Myeloma Cells ◽  
Non Coding Rna ◽  
Sensitizing Effect ◽  
Long Non Coding Rna ◽  
Anti Tumor Activity

scholarly journals Exploring EZH2-Proteasome Dual-Targeting Drug Discovery through a Computational Strategy to Fight Multiple Myeloma

Molecules ◽  
2021 ◽  
Vol 26 (18) ◽  
pp. 5574
Author(s):  
Filipe G. A. Estrada ◽  
Silvia Miccoli ◽  
Natália Aniceto ◽  
Alfonso T. Garcia-Sosa ◽  
Rita C. Guedes
Keyword(s):  
Multiple Myeloma ◽  
Drug Discovery ◽  
Chemical Space ◽  
Acquired Resistance ◽  
Developed Countries ◽  
Qsar Model ◽  
Neoplastic Disease ◽  
Dual Inhibitor ◽  
Dual Targeting ◽  
Proteasome 20S

Multiple myeloma is an incurable plasma cell neoplastic disease representing about 10–15% of all haematological malignancies diagnosed in developed countries. Proteasome is a key player in multiple myeloma and proteasome inhibitors are the current first-line of treatment. However, these are associated with limited clinical efficacy due to acquired resistance. One of the solutions to overcome this problem is a polypharmacology approach, namely combination therapy and multitargeting drugs. Several polypharmacology avenues are currently being explored. The simultaneous inhibition of EZH2 and Proteasome 20S remains to be investigated, despite the encouraging evidence of therapeutic synergy between the two. Therefore, we sought to bridge this gap by proposing a holistic in silico strategy to find new dual-target inhibitors. First, we assessed the characteristics of both pockets and compared the chemical space of EZH2 and Proteasome 20S inhibitors, to establish the feasibility of dual targeting. This was followed by molecular docking calculations performed on EZH2 and Proteasome 20S inhibitors from ChEMBL 25, from which we derived a predictive model to propose new EZH2 inhibitors among Proteasome 20S compounds, and vice versa, which yielded two dual-inhibitor hits. Complementarily, we built a machine learning QSAR model for each target but realised their application to our data is very limited as each dataset occupies a different region of chemical space. We finally proceeded with molecular dynamics simulations of the two docking hits against the two targets. Overall, we concluded that one of the hit compounds is particularly promising as a dual-inhibitor candidate exhibiting extensive hydrogen bonding with both targets. Furthermore, this work serves as a framework for how to rationally approach a dual-targeting drug discovery project, from the selection of the targets to the prediction of new hit compounds.

scholarly journals Metformin and FTY720 Synergistically Induce Apoptosis in Multiple Myeloma Cells

2018 ◽  
Vol 48 (2) ◽  
pp. 785-800 ◽  
Author(s):  
Yi Zhao ◽  
Enfan Zhang ◽  
Ning Lv ◽  
Liang Ma ◽  
Shunnan Yao ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Er Stress ◽  
Resistance Mechanisms ◽  
Ros Generation ◽  
Dependent Manner ◽  
Mtor Signaling Pathway ◽  
Resistant Disease ◽  
Ros Scavenger ◽  
Anti Tumor Activity ◽  
Mtt Assays

Background/Aims: Patients with multiple myeloma (MM) invariably relapse with chemotherapy-resistant disease, underscoring the need for new therapeutic options that bypass these resistance mechanisms. Metformin is a widely prescribed antidiabetic drug with direct antitumor activity against various tumor cell lines. FTY720, also known as fingolimod, is an immune-modulating agent approved by the FDA as oral medication to treat the relapsing form of multiple sclerosis (MS). In recent years, FTY720 has attracted attention due to its anti-tumor activity. To explore an optimized combinational therapy, interactions between metformin and FTY720 were examined in MM cells. Methods: MTT assays were employed to assess the viability of MM cells. An apoptotic nucleosome assay was employed to measure apoptosis. Loss of mitochondrial membrane potential (MMP, ΔΨm) and cellular levels of ROS were measured by flow cytometry. qRT-PCR was used to analyze the expression of mRNAs. Western blotting assays were applied to measure the levels of proteins involved in different signaling pathways. Results: Coadministration of metformin and FTY720 synergistically inhibited the proliferation of MM cells. Increased levels of apoptosis, activation of caspase-3 and cleavage of PARP were detected after cotreatment with metformin and FTY720. These events were associated with modulation of Bcl-2 proteins, loss of MMP, ER stress induction, and inhibition of the PI3K/AKT/mTOR signaling pathway. The metformin/FTY720 regimen markedly induced ROS generation; moreover, apoptosis, ER stress and inhibition of PI3K/AKT/ mTOR were attenuated by the ROS scavenger NAC. Conclusions: Exposure to metformin in combination with FTY720 potently induces apoptosis in MM cells in a ROS-dependent manner, suggesting that a strategy combining these agents warrants further investigation in MM.

Anti-tumor activity of the proteasome inhibitor BSc2118 against human multiple myeloma

2015 ◽  
Vol 366 (2) ◽  
pp. 173-181 ◽  
Author(s):  
Meirong Zang ◽  
Zengjun Li ◽  
Lanting Liu ◽  
Fei Li ◽  
Xin Li ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Proteasome Inhibitor ◽  
Human Multiple Myeloma ◽  
Anti Tumor Activity

scholarly journals TRIM13 (RFP2) downregulation decreases tumour cell growth in multiple myeloma through inhibition of NF Kappa B pathway and proteasome activity

2013 ◽  
Vol 162 (2) ◽  
pp. 210-220 ◽  
Author(s):  
Moshe E. Gatt ◽  
Kohichi Takada ◽  
Mala Mani ◽  
Mikael Lerner ◽  
Marjorie Pick ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Cell Growth ◽  
Tumour Cell ◽  
Proteasome Activity ◽  
Nf Kappa B ◽  
Tumour Cell Growth

A Multicenter Phase I/II Trial Evaluating the Safety and Efficacy of Lenalidomide [Revlimidä (R), CC-5013] in Combination with Doxorubicin and Dexamethasone (RAD) in Patients with Relapsed or Refractory Multiple Myeloma.

Blood ◽  
2005 ◽  
Vol 106 (11) ◽  
pp. 5136-5136 ◽  
Author(s):  
C. Gerecke ◽  
S. Knop ◽  
M.S. Topp ◽  
S. Kotkiewitz ◽  
H. Gollasch ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Phase I ◽  
Dose Level ◽  
Fixed Dose ◽  
Severe Toxicity ◽  
Refractory Multiple Myeloma ◽  
Dose Levels ◽  
Anti Tumor Activity ◽  
Level 2 ◽  
Dose Limiting Toxicity

Abstract Introdution: Lenalidomide (Revlimid™) is Celgene’s lead clinical compound in a new group of drugs called IMiDs, which have immunomodularory properties. The drug has been evaluated in phase-I, II, and III clinical trials for the treatment of multiple myeloma (MM). Lenalidomide shows substantial anti-tumor activity in patients with refractory or relapsed MM and significantly prolongs time to tumor progression (TTP) compared to standard therapy in these patients. Lenalidomide was well tolerated in these trials, the only dose limiting toxicity in a phase-I trial was myelosuppression. In order to further improve therapeutic efficacy and to overcome drug resistance we are currently evaluating Lenalidomide (Revlimid™) in combination with doxorubicin and dexamethasone (RAD) for the treatment of patients with refracrory or relapsed MM in a phase-I/II trial. Methods: Patients with relapsed or refractory multiple myeloma recieve a fixed dose of either 10 mg or 15 mg Revlimid Revlimid™ given daily for 21 days (d 1–21) in combination with doxorubicin (adriamycin) and dexamethasone, to be repeated on day 29. Three dose levels of doxorubicin (adramycin) are planned: 4 mg/m2 day 1–4, 6 mg/m2 day 1–4 and 9 mg/m2 day 1–4. 40 mg dexamethasone is given orally day 1–4 and day 17–20 at a fixed dose. 3– 6 cycles are applicated unless severe toxicity or disease progression occurs. Results: RAD treatment was well tolerated at dose level 1 and dose level 2. Therefore, current dose escalation is continued. All patients treated at the first two dose levels (6/6) responded to RAD treatment. Further updated results on this trial will be presented.

A Humanized Anti-Ganglioside GM2 Antibody, BIW-8962, Exhibits ADCC/CDC Activity against Multiple Myeloma Cells and Potent Anti- Tumor Activity in Mouse Xenograft Models.

Blood ◽  
2008 ◽  
Vol 112 (11) ◽  
pp. 1718-1718 ◽  
Author(s):  
Toshihiko Ishii ◽  
Asher Alban Chanan-Khan ◽  
Jazur Jafferjee ◽  
Noreen Ersing ◽  
Takeshi Takahashi ◽  
...  
Keyword(s):  
Multiple Myeloma ◽  
Cell Lines ◽  
Phase 1 ◽  
Xenograft Model ◽  
Surface Expression ◽  
Scid Mice ◽  
Subcutaneous Xenograft ◽  
Anti Tumor Activity

Abstract BIW-8962 is a humanized anti-ganglioside GM2 (GM2) monoclonal antibody, produced by Poteligent technology to enhance ADCC activity. GM2 is expressed on many cancer cells including multiple myeloma (MM), small cell lung cancer and glioma cells. In this study, we evaluated the anti-myeloma activity of BIW-8962 in preclinical myeloma models both in vitro and in vivo. Expression of GM2 was analyzed in 15 human MM cell lines by FCM. Eleven out of 15 MM cell lines had positive surface expression of GM2. GM2 as a potential target was then verified in primary MM samples obtained from patients. Eleven out of 15 samples were positive for GM2. We then used two GM2 positive MM cell lines (U266B1 and KMS-11) and evaluated ADCC and CDC activity of BIW-8962 in vitro. BIW-8962 exhibited a potent ADCC and less potent CDC activity. In vivo anti-tumor activity of BIW-8962 was then examined using the standard subcutaneous xenograft model; KMS-11 was inoculated in the flank of SCID mice. BIW-8962 (intravenously administered biweekly for 3 weeks) exhibited a potent anti-tumor activity from as low a dose level as 0.1 mg/kg. Furthermore, in a more clinically relevant model, in which OPM-2/GFP (GM2 positive MM cell line) cells were intravenously inoculated into SCID mice with preferentially tumor growth within the bone marrow microenvironment, BIW-8962 (intravenously administered biweekly for 4 weeks, 10 mg/kg) suppressed OPM-2/GFP cell growth and serum M protein elevation, demonstrating in vivo anti-myeloma effect of BIW-8962. Our preclinical investigations rationalize clinical evaluation of BIW-8962 in patients with MM. Currently BIW-8962 is being investigated in a Phase 1 study in patients with multiple myeloma.

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