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Cancer: Myeloma

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Total 122 results found since Jan 2013.

The mechanism of SP1/p300 complex promotes proliferation of multiple myeloma cells through regulating IQGAP1 transcription
Publication date: November 2019Source: Biomedicine & Pharmacotherapy, Volume 119Author(s): Zhouxiang Jin, Shujuan Zhou, Haige Ye, Songfu Jiang, Kang Yu, Yongyong MaAbstractOur previous research had firstly shown that MM cells overexpressed IQGAP1 gene and activated Ras/Raf/MEK/ERK pathway. But the mechanism of IQGAP1 overexpression and IQGAP1 gene transcription regulation remains uncertain. The mechanism of IQGAP1 overexpression and transcriptional regulation of IQGAP1 gene in myeloma cells was explored in the study. Through bioinformatics analysis and prediction we predicted and screened transcription factor Sp1 as a poss...
Source: Biomedicine and Pharmacotherapy - September 17, 2019 Category: Drugs & Pharmacology Source Type: research

The mechanism of SP1/p300 complex promotes proliferation of multiple myeloma cells through regulating IQGAP1 transcription.
Abstract Our previous research had firstly shown that MM cells overexpressed IQGAP1 gene and activated Ras/Raf/MEK/ERK pathway. But the mechanism of IQGAP1 overexpression and IQGAP1 gene transcription regulation remains uncertain. The mechanism of IQGAP1 overexpression and transcriptional regulation of IQGAP1 gene in myeloma cells was explored in the study. Through bioinformatics analysis and prediction we predicted and screened transcription factor Sp1 as a possible upstream regulator of IQGAP1.The proliferation, cell cycle and downstream ERK1/2 and p-ERK1/2 proteins were detected after siRNA-IQGAP1 was transfect...
Source: Biomedicine and pharmacotherapy = Biomedecine and pharmacotherapie - September 15, 2019 Category: Drugs & Pharmacology Authors: Jin Z, Zhou S, Ye H, Jiang S, Yu K, Ma Y Tags: Biomed Pharmacother Source Type: research

Long noncoding RNA H19 promotes vincristine resistance in multiple myeloma by targeting Akt.
Authors: Wang Y, Xu S, Wang L, Liu J, Wang J, Zhou J Abstract Multiple myeloma is a malignant proliferation of plasma cells that results from a single clone. Manifestations include bone pain or fractures, kidney failure, susceptibility to infection, anemia, and hypercalcemia. To investigate the relationship between vincristine (VCR) resistance and Long noncoding RNA H19 (Lnc-RNA H19) in multiple myeloma (MM) this experiment was set up. For this aim, RT-PCR was used to detect the expression of lnc-RNA H19 in 60 MM patients from No.215 Hospital of Shaanxi Nuclear Industry and 50 healthy controls, and further detected...
Source: Cellular and Molecular Biology - October 14, 2020 Category: Molecular Biology Tags: Cell Mol Biol (Noisy-le-grand) Source Type: research

The combination of C-Myc rearrangement and 1q21 gain is associated with poor prognosis in multiple myeloma
AbstractThe prognostic value of chromosomal 1q21 gain in newly diagnosed multiple myeloma (NDMM) remains controversial. Add-on Myc aberrations may further worsen the outcome. To investigate whether specific genes located at the 1q21 region, such as myeloid cell leukemia 1 (Mcl-1), are involved in NDMM progression, we examined bone marrow cytogenetic abnormalities in 153 patients with NDMM by fluorescence in situ hybridization. Their response to treatment and survival was also analyzed.C-Myc andMcl-1 expressions in bone marrow samples were analyzed by RT-PCR. The expression of Mcl-1 was evaluated in bone marrow sections by ...
Source: Annals of Hematology - March 8, 2021 Category: Hematology Source Type: research

Bim downregulation by activation of NF- κB p65, Akt, and ERK1/2 is associated with adriamycin and dexamethasone resistance in multiple myeloma cells
In this study, we examined the MDR mechanism in adriamycin- and dexamethasone-resistant cells. RPMI8226/ADM, ARH-77/ADM, RPMI8226/DEX, and ARH-77/DEX cells exhibited enhanced nuclear factor κB (NF-κB) p65, Akt, and extracellular signal-regulated kinase 1/2 (ERK1/2) activation. Combination treatment with NF-κB p65, phosphoinositide 3-kinase (PI3K), and mitogen-activated protein kinase 1/2 (MEK1/2) inhibitors resensitized to adriamycin and dexamethasone via increased Bim expression. A lthough treatment with MDR1 or Survivin siRNA did not overcome adriamycin and dexamethasone resistance in RPMI8226/ADM and RPMI8226/DEX cel...
Source: Clinical and Experimental Medicine - November 30, 2022 Category: Research Source Type: research

Gene silencing of the BDNF/TrkB axis in multiple myeloma blocks bone destruction and tumor burden in vitro and in vivo
Abstract Osteolytic bone diseases are a prominent feature of multiple myeloma (MM), resulting from aberrant osteoclastic bone resorption that is uncoupled from osteoblastic bone formation. Myeloma stimulates osteoclastogenesis, which is largely dependent on an increase in receptor activator of NF‐κB ligand (RANKL) and a decrease in osteoprotegerin (OPG) within the bone marrow milieu. Recently, brain derived neurotrophic factor (BDNF) was identified as a MM‐derived factor that correlates with increased RANKL levels and contributes to osteolytic bone destruction in myeloma patients. Because tyrosine receptor kinase B (T...
Source: International Journal of Cancer - February 19, 2013 Category: Cancer & Oncology Authors: Li‐Sha Ai, Chun‐Yan Sun, Ya‐Dan Wang, Lu Zhang, Zhang‐Bo Chu, You Qin, Fei Gao, Han Yan, Tao Guo, Lei Chen, Di Yang, Yu Hu Tags: Cancer Cell Biology Source Type: research

Activating transcription factor 4, an ER stress mediator, is required for, but excessive ER stress suppresses osteoblastogenesis by bortezomib.
Abstract Endoplasmic reticulum (ER) stress is induced in matrix-producing osteoblasts and plays an essential role in osteoblastogenesis. Although the bone anabolic activity of proteasome inhibitors has been demonstrated, the roles of ER stress induced by proteasome inhibition in osteoblastogenesis remain largely unknown. Here we show that bortezomib translationally increases protein levels of activating transcription factor 4 (ATF4), a downstream mediator of ER stress, in bone marrow stromal cells and MC3T3-E1 preosteoblastic cells. The suppression of ATF4 expression by siRNA abrogated osteocalcin expression and m...
Source: International Journal of Hematology - May 25, 2013 Category: Hematology Authors: Nakamura S, Miki H, Kido S, Nakano A, Hiasa M, Oda A, Amou H, Watanabe K, Harada T, Fujii S, Takeuchi K, Kagawa K, Ozaki S, Matsumoto T, Abe M Tags: Int J Hematol Source Type: research

β‐Caryophyllene oxide Inhibits Constitutive and Inducible STAT3 Signaling Pathway Through Induction of the SHP‐1 Protein Tyrosine Phosphatase
Abstract Constitutive activation of STAT3 is frequently observed and closely linked with proliferation, survival, invasion, metastasis and angiogenesis in tumor cells. In the present study, we investigated whether β‐caryophyllene oxide (CPO), a sesquiterpene isolated primarily from the essential oils of medicinal plants such as guava (Psidium guajava), and oregano (Origanum vulgare L.), can mediate its effect through interference with the STAT3 activation pathway in cancer cells. The effect of CPO on STAT3 activation, associated protein kinases and phosphatase, STAT3‐regulated gene products and apoptosis was investiga...
Source: Molecular Carcinogenesis - June 13, 2013 Category: Molecular Biology Authors: Chulwon Kim, Somi K. Cho, Shweta Kapoor, Ansu Kumar, Shireen Vali, Taher Abbasi, Sung‐Hoon Kim, Gautam Sethi, Kwang Seok Ahn Tags: Research Article Source Type: research

Regulation of cellular processes by interleukin‐16 in homeostasis and cancer
This article will review the cellular process for generating IL‐16, the biological activities for both the pro‐ and secreted forms of the protein, and then the mechanism by which these forms contribute to cancer progression. As a soluble cytokine the ability to reduce or eliminate IL‐16 synthesis through siRNA approaches or bioactivity through the use of neutralizing antibody treatment may represent a novel therapeutic approach. J. Cell. Physiol. © 2013 Wiley Periodicals, Inc.
Source: Journal of Cellular Physiology - July 29, 2013 Category: Cytology Authors: Jillian Richmond, Marina Tuzova, William Cruikshank, David Center Tags: Mini‐Review Source Type: research

CD147 regulates the expression of MCT1 and lactate export in multiple myeloma cells.
Abstract Increased use of the glycolytic pathway, even in the presence of oxygen, has recently been recognized as a key characteristic of malignant cells. However, the glycolytic phenotype results in increased lactic acid production and, in order to prevent cellular acidosis tumor cells, must increase proton efflux via upregulation of pH regulators such as proton-pumps, sodium-proton exchangers, and/or monocarboxylate transporters (MCT) (e.g., MCT1, MCT4). Interestingly, expression of MCT1 and MCT4 has been previously shown to be dependent upon expression of the transmembrane glycoprotein CD147. Recently, we demon...
Source: Cell Cycle - September 3, 2013 Category: Cytology Authors: Walters DK, Arendt BK, Jelinek DF Tags: Cell Cycle Source Type: research

Syntaxin-4 is implicated in the secretion of antibodies by human plasma cells.
Abstract PCs are responsible for the production and secretion of antibodies, the effector molecules of the humoral immune response. The molecular mechanisms responsible for vesicle docking and secretion implicated in the antibody-secretion process are not well-known, as they have not been studied, but it is known that SNARE proteins are responsible for many membrane-fusion processes in the cell. We show here that freshly isolated human colon LP-PCs and T-PCs from MM-PC patients and the U266 cell line, as a model for PC secretion, contain a set of these proteins. SNAP23, STX3, and STX4 were localized mainly in the ...
Source: Journal of Leukocyte Biology - October 21, 2013 Category: Hematology Authors: Gómez-Jaramillo L, Delgado-Pérez L, Reales E, Mora-López F, Mateos RM, García-Poley A, Brieva JA, Campos-Caro A Tags: J Leukoc Biol Source Type: research

Chemotherapy stimulates syndecan-1 shedding: A potentially negative effect of treatment that may promote tumor relapse.
Abstract In patients with multiple myeloma, the heparan sulfate proteoglycan syndecan-1 (CD138) is shed from the surface of tumor cells and accumulates in the serum and within the extracellular matrix of the bone marrow where it promotes tumor growth and metastasis. In the present study we discovered that commonly used anti-myeloma drugs stimulate syndecan-1 shedding both in vitro and in animals bearing myeloma tumors. Enhanced shedding is accompanied by increased syndecan-1 synthesis prior to drug induced tumor cell death. Addition of a caspase inhibitor blocks the drug-induced shedding of syndecan-1 in vitro ind...
Source: Matrix Biology - October 18, 2013 Category: Molecular Biology Authors: Ramani VC, Sanderson RD Tags: Matrix Biol Source Type: research

Adhesion to fibronectin induces p27(Kip1) nuclear accumulation through down-regulation of Jab1 and contributes to cell adhesion-mediated drug resistance (CAM-DR) in RPMI 8,226 cells.
In conclusion, our data suggest that Jab1 plays an important role in CAM-DR, which depends on pSer10-p27(Kip1)-mediated subcellular localization of p27(Kip1). The understanding of this novel molecular mechanism may prove valuable in designing new therapeutic approaches for CAM-DR in Multiple myeloma. PMID: 24170542 [PubMed - as supplied by publisher]
Source: Molecular and Cellular Biochemistry - October 30, 2013 Category: Biochemistry Authors: Fei M, Hang Q, Hou S, He S, Ruan C Tags: Mol Cell Biochem Source Type: research

A role for activator of G-protein signaling 3 (AGS3) in multiple myeloma.
In this report, we delineate the anti-apoptotic role of AGS3 in multiple myeloma (MM). To do this, we developed a cell apoptotic model induced by doxorubicin in MM. Our data indicate that decreased expression of AGS3 is correlated with reduced levels of p-CREB in the apoptotic model. The negative role of AGS3 in cell apoptosis was further confirmed by knocking down AGS3. The microenvironment has been shown to influence tumor cell phenotype in response to chemotherapy. Since cell adhesion-mediated drug resistance remains a major obstacle for successful treatment of MM, we constructed a cell adhesion model in MM and detected...
Source: International Journal of Hematology - December 5, 2013 Category: Hematology Authors: Shao S, Huang X, Wang Y, He S, Xu X, Zhu X, Yang X, Ding Z, Yao L, Huang Y, Wang C Tags: Int J Hematol Source Type: research